CN207856191U - A kind of portable folding board for lying on back - Google Patents

Abstract

The utility model provides a portable foldable supine board, which includes a leg assembly and a supine board assembly. Strut bottom bar. The retaining leg is arranged on the pillar, and the pillar bottom bar is arranged on the bottom of the pillar and is perpendicular to the pillar. One end of the center seat assembly is connected with an adjustable angle with the upper end of the pillar, the other end is connected with one end of the rear seat assembly with an adjustable angle, and the other end of the rear seat assembly is connected with the cushion assembly with an adjustable angle. The center seat board assembly and the rear seat board assembly are combined to form a supine board surface, and the cushion assembly falls to the ground as a seat cushion. The supine board can be transformed into the form of a fitness chair, and the supine board can be folded by pulling out the pin shafts at the folding joints. The foldable sit-up board diversifies the functions of the sit-up board. The foldable structure saves floor space and is easy to carry and store, making it more suitable for home use.

Description

A portable folding supine board

technical field

The utility model belongs to the technical field of fitness equipment, and relates to an improvement of a supine board, in particular to a portable folding supine board.

Background technique

With the improvement of people's living standards and the enhancement of health awareness, fitness activities have gradually become people's fashion sports, and now various fitness equipment has gradually begun to enter the families of ordinary people. As a kind of practical fitness equipment, the supine board has the advantages of convenient use and good exercise effect, and is loved by the majority of fitness enthusiasts. The traditional supine board is generally a fixed one-piece structure with a single function, cannot be folded, takes up a lot of space, and is inconvenient to carry, so it is not suitable for home use.

How to design a portable folding supine board, which has multiple functions, is convenient to fold and store and carry, has a small floor space, and is suitable for family use is a problem to be solved urgently in this area.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the utility model provides a portable folding supine board, which has diversified functions, saves floor space, is convenient for storage and carrying, and is suitable for family use.

The purpose of this utility model is achieved by the following technical solutions:

A portable foldable supine board, comprising outrigger assembly and supine board assembly, characterized in that the supine board assembly includes a mid-seat board assembly, a rear seat board assembly and a cushion assembly, and the outrigger assembly 1 includes a pillar, a leg and the bottom rod of the pillar, the retaining legs are arranged on the pillar, the bottom rod of the pillar is arranged at the bottom of the pillar and is perpendicular to the pillar; one end of the center seat assembly is connected with the upper end of the pillar by an adjustable angle, The other end and one end of the back seat assembly are in an adjustable angle connection, and the other end of the back seat assembly is in an adjustable angle connection with the cushion assembly; the middle seat assembly and the back seat assembly are combined into a supine board On the board surface, the cushion assembly falls to the ground as a cushion.

Improvement to the above technical solution: the support of the leg assembly is a square tube, a support bolt hole passing through the square tube is opened at the lower end, and a support pin hole is opened above the support bolt hole; The center seat assembly described above includes the center seat and two center seat bottom beams, the two center seat bottom beams are fixed at the middle of the bottom surface of the center seat at intervals along the front and back direction of the center seat, and are connected with the outrigger assembly A front U-shaped frame is set between the two middle seat bottom beams at one end of the front U-shaped frame, and upper pin holes and lower bolt holes are opened on the two side walls of the front U-shaped frame; Handrails perpendicular to the bottom beam of the center seat plate and parallel to the bottom surface of the center seat plate are respectively arranged on the two center seat plate bottom beams; the upper ends of the pillars are inserted into the middle of the two side walls of the front U-shaped frame, Go through the lower bolt holes on the two side walls of the front U-shaped frame and the pillar bolt holes at the lower end of the pillar, and fix them with nuts so that the legs and the center seat can be rotated and folded; The upper pin hole on the two side walls of the U-shaped frame and the pillar pin hole at the lower end of the pillar make the legs and the center seat board fixed at a certain angle to form an assembly A.

A further improvement to the above technical solution: a rear U-shaped frame is set between the two center seat bottom beams at the end where the center seat assembly is connected to the rear seat assembly, and on both sides of the rear U-shaped frame A shaft retaining groove is opened at the upper end of the wall, and a first pin hole and a second pin hole penetrating through the side walls of the two bottom beams of the center seat are provided on the two bottom beams of the center seat; The panel assembly includes a rear seat board and a rear seat board bottom beam. The rear seat board bottom beam is a square tube fixed on the middle part of the bottom surface of the rear seat board along the front and rear directions of the rear seat board. A long pin hole is opened on the top, and a stop shaft perpendicular to the bottom beam and parallel to the bottom surface of the back seat is fixed on the bottom surface of the bottom beam of the back seat close to the long pin hole. The length of the stop shaft is longer than the two the distance between the two retaining shaft grooves; insert the end of the rear seat plate sill with the retaining shaft between the two side walls of the rear U-shaped frame, and make the rear seat plate and the middle seat plate on the same plane, Use a long pin to pass through the second pin hole on the middle seat plate assembly and the long pin hole on the rear seat plate assembly, so that the retaining shaft is stuck on the rear side of the rear U-shaped frame, and the middle seat plate and the rear seat plate Position to form the supine deck, making up assembly B.

A further improvement to the above technical solution: a connection shaft perpendicular to the bottom beam of the back seat and parallel to the bottom surface of the back seat is provided on the bottom beam of the back seat at the end where the back seat assembly is connected to the seat cushion assembly; The side of the cushion plate at one end of the assembly connected to the rear seat assembly is provided with a connecting sleeve matching the connecting shaft on the rear seat assembly; the connecting sleeve is connected to the connecting shaft to form a cushion type supine board assembly C .

A further improvement to the above technical solution: two pull cord assemblies are also configured, the pull cord assemblies include a pull rope, a pull ring and a gourd buckle, one end of the pull rope is connected to the gourd buckle, and the other end is connected to the pull A U-shaped ring is provided at both ends of the bottom rod of the pillar; the gourd buckles of the two pull cord assemblies are respectively connected to the U-shaped rings on the two ends of the bottom rod of the pillar, forming a fully functional supine plate.

A further improvement to the above technical solution: when the rear seat board assembly is connected to the middle seat board assembly, insert the end of the rear seat board bottom beam with the stop shaft between the two side walls of the rear U-shaped frame of the middle seat board, and make the rear seat board The plate is perpendicular to the middle seat plate, and the long pin passes through the first pin hole on the middle seat plate assembly and the long pin hole on the rear seat plate assembly, and clamps the retaining shaft on the retaining shaft of the rear U-shaped frame In the slot, the middle seat board and the rear seat board are positioned to form a fitness chair shape.

A further improvement to the above technical solution: the pillar of the outrigger assembly is provided with a plurality of bolt fixing holes of different heights, and the blocking legs are fixed in the bolt fixing holes of different heights with bolts to adjust the blocking legs in stages the height of.

A further improvement to the above technical solution: the support of the leg assembly is provided with a long slotted hole along the height direction, and the blocking legs are fixed to different positions of the long slot holes on the support with bolts to continuously adjust the height of the blocking legs .

Advantage and positive effect of the present utility model are:

The portable foldable supine board of the utility model has the functions of a supine board and a fitness chair, so that its functions are diversified, and the structure is simple, the cost is low, the folding conversion operation is convenient, the floor space is saved, and it is also convenient to carry and store, and is more suitable for families use.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a portable folding supine board of the present invention;

Fig. 2 is a partial structure schematic diagram of a portable folding supine board of the present invention;

Fig. 3 is a structural schematic diagram of an assembly A of a portable folding supine board of the present invention;

Fig. 4 is a structural schematic diagram of an assembly B of a portable folding supine board of the present invention;

Fig. 5 is a structural schematic diagram of an assembly C of a portable folding supine board of the present invention;

Fig. 6 is a schematic diagram of the assembly structure of a fitness chair with a portable folding supine board of the present invention;

Fig. 7 is a schematic diagram of a folded state of a portable foldable supine board of the present invention.

The serial numbers in the figure are:

1-leg assembly: 1.1-pillar, 1.2-nut, 1.3-U-shaped ring, 1.4-pillar bottom rod, 1.5-knob, 1.6-stop leg, 1.7-pillar pin hole, 1.8-pillar bolt hole;

2-Central seat assembly: 2.1-Central seat, 2.2-Handrail, 2.3-Lower bolt hole, 2.4-Upper pin hole, 2.5-Front U-shaped frame, 2.6-Central seat bottom beam, 2.7-Axis retaining groove , 2.8-rear U-shaped frame, 2.9-first pin hole, 2.10-second pin hole;

3-rear seat assembly: 3.1-rear seat, 3.2-rear seat bottom beam, 3.3-stop shaft, 3.4-long pin hole, 3.5-connecting shaft;

4-Cushion components: 4.1-Cushion board, 4.2-Connecting bushing;

5-drawing rope components: 5.1-drawing rope, 5.2-drawing ring, 5.3-gourd buckle;

6-pin shaft, 7-bolt, 8-long pin shaft.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1-Fig. 2, an embodiment of a portable foldable supine board of the present invention includes an outrigger assembly 1 and a supine board assembly. The above-mentioned supine board assembly includes a middle seat board assembly 2, a rear seat board assembly 3 and a cushion assembly 4, and the above-mentioned outrigger assembly 1 includes a pillar 1.1, a retaining leg 1.6 and a pillar bottom rod 1.4, and the retaining leg 1.6 is arranged on the pillar 1.1, at the bottom of the pillar The rod 1.4 is arranged at the bottom of the column 1.1 and is perpendicular to the column 1.1. One end of the above-mentioned center seat assembly 2 is connected with an adjustable angle to the upper end of the pillar 1.1, and the other end is connected with an adjustable angle with one end of the rear seat assembly 3. Angle-adjustable movable connection; the middle seat assembly 2 and the rear seat assembly 3 are combined into a supine board surface, and the cushion assembly 4 falls to the ground as a cushion.

Specifically: as shown in Figure 2, the pillar 1.1 of the above-mentioned outrigger assembly 1 is a square pipe, and a pillar bolt hole 1.8 passing through the square pipe is opened at its lower end, and a pillar passing through the square pipe is opened above the pillar bolt hole 1.8 Pin hole 1.7. The center seat assembly 2 includes a center seat 2.1 and two center seat bottom beams 2.6, and the two center seat bottom beams 2.6 are fixed on the middle part of the bottom surface of the center seat 2.1 along the front and rear directions of the center seat 2.1. A front U-shaped frame 2.5 is arranged between the two center seat bottom beams 2.6 at one end connected to the outrigger assembly 1, and an upper pin hole 2.4 and a lower bolt hole are opened on the two side walls of the front U-shaped frame 2.5 2.3. Handrails 2.2 perpendicular to the bottom beams 2.6 of the center seat and parallel to the bottom surface of the center seat 2.1 are respectively provided on the two center seat bottom beams 2.6 on both sides of the front U-shaped frame 2.5. Insert the upper end of the pillar 1.1 into the middle of the two side walls of the front U-shaped frame 2.5, pass the bolt 7 through the lower bolt hole 2.3 on the two side walls of the front U-shaped frame 2.5 and the pillar bolt hole 1.8 at the lower end of the pillar 1.1, and fix it with a nut, The supporting legs 1 and the center seat board 2 can be rotated and folded. In the opened state, pass the upper pin hole 2.4 on the two side walls of the front U-shaped frame 2.5 and the pillar pin hole 1.7 on the lower end of the pillar 1.1 with the pin 6, so that the supporting leg 1 and the center seat plate 2 are fixed to a fixed position. angle, forming assembly A. As shown in Figure 3.

A rear U-shaped frame 2.8 is arranged between the two center seat bottom beams 2.6 at the end where the center seat assembly 2 and the rear seat assembly 3 are connected, and a shaft retaining groove is respectively opened on the upper ends of the two side walls of the rear U-shaped frame 2.8 2.7. A first pin hole 2.9 and a second pin hole 2.10 are provided on the two center seat bottom beams 2.6 to penetrate through the side walls of the two center seat bottom beams 2.6. The above-mentioned recliner assembly 3 includes a recliner 3.1 and a recliner bottom beam 3.2. The recliner bottom beam 3.2 is a square tube fixed in the middle of the bottom surface of the recliner 3.1 along the front-to-back direction of the recliner 3.1. A long pin hole 3.4 is provided on the rear seat bottom beam 3.2 at one end connected to the center seat assembly 2, and a long pin hole 3.4 is fixed on the bottom surface of the rear seat bottom beam 3.2 close to the long pin hole 3.4. The parallel stop shaft 3.3, the length of the stop shaft 3.3 is greater than the distance between the two stop shaft grooves 2.7 on the center seat assembly 2. Insert the end of the rear seat bottom beam 3.2 with the retaining shaft 3.3 between the two side walls of the rear U-shaped frame 2.8, and make the rear seat 3.1 and the middle seat plate 2.1 on the same plane, and use the long pin shaft 8 to pass through the middle seat plate The second pin hole 2.10 on the component 2 and the long pin hole 3.4 on the rear seat assembly 3 make the retaining shaft 3.3 stuck on the rear side of the rear U-shaped frame 2.8, and the middle seat plate 2.1 and the rear seat plate 3.1 are positioned to form a supine board Board surface, which constitutes assembly B. As shown in Figure 4.

Set a connecting shaft 3.5 perpendicular to the rear seat bottom beam 3.2 and parallel to the bottom surface of the rear seat board 3.1 on the rear seat bottom beam 3.2 at one end of the rear seat assembly 3 and the seat cushion assembly 4; 3. The side of the cushion board 4.1 at one end of the connection is provided with a connecting shaft sleeve 4.2 matched with the connecting shaft 3.5 on the rear seat assembly 3. The connecting shaft sleeve 4.2 is connected with the connecting shaft 3.5 to form a cushion type supine board assembly C. As shown in Figure 1.

The portable foldable supine board of the present utility model is also equipped with two pull cord assemblies 5, and the pull cord assembly 5 includes a stay rope 5.1, a pull ring 5.2 and a gourd buckle 5.3, one end of the stay rope 5.1 is connected to the gourd buckle 5.3, and the other is One end is connected to the pull ring 5.2. A U-shaped ring 1.3 is respectively arranged at both ends of the pillar bottom bar 1.4; the gourd buckles 5.3 of the two pull cord assemblies 5 are respectively connected to the U-shaped rings 1.3 on the two ends of the pillar bottom bar 1.4 to form a complete function supine board. As shown in Figure 5.

When the rear seat assembly 3 is connected to the middle seat assembly 2, insert the end of the rear seat bottom beam 3.2 with the stop shaft 3.3 between the two side walls of the rear U-shaped frame 2.8 of the middle seat, and make the rear seat 3.1 and The middle seat plate 2.1 is vertical, use the long pin shaft 8 to pass through the first pin shaft hole 2.9 on the middle seat plate assembly 2 and the long pin hole 3.4 on the rear seat plate assembly 3, and clamp the retaining shaft 3.3 on the rear U In the shaft retaining groove 2.7 of the frame 2.8, the middle seat plate 2.1 and the rear seat plate 3.1 are positioned to form a fitness chair. As shown in Figure 6.

In order to facilitate the use of different groups of people, one embodiment of adjusting the height of the retaining leg 1.6 is: a plurality of bolt holes of different heights are provided on the pillar 1.1 of the outrigger assembly 1, and the retaining leg 1.6 is fixed on different bolt holes with bolts. In the hole, the height of the retaining leg 1.6 can be adjusted in stages; another embodiment for adjusting the height of the retaining leg 1.6 is: a long slot hole is arranged along the height direction on the pillar 1.1 of the leg assembly 1, and the retaining leg 1.6 is fixed with bolts The height of the blocking leg 1.6 is continuously adjusted at different positions of the long slot holes on the pillar 1.1.

The specific assembly method of the utility model portable folding supine board is as follows:

Step 1: Insert the upper end of the pillar 1.1 of the outrigger assembly 1 between the two side walls of the front U-shaped frame 2.5 of the center seat assembly 2, and use the bolt 7 to pass through the lower bolt holes on the two arms of the front U-shaped frame 2.5 2.3 and the pillar bolt hole 1.8 at the lower end of the pillar 1.1 are fixed with nuts. At this time, the outrigger 1 and the center seat plate 2 can be rotated and folded. In the opened state, the long pin shaft 8 passes through the upper part of the two arms of the front U-shaped frame 2.5. The pin hole 2.4 and the pillar pin hole 1.7 at the lower end of the pillar 1.1 just fix the support leg 1 and the center seat plate 2 at a certain angle to form an assembly A, as shown in Figure 3 .

Step 2: Insert the end of the rear seat beam 3.2 on the rear seat assembly 3 with the retaining shaft 3.3 between the two side walls of the rear U-shaped frame 2.8 of the middle seat plate on the assembly A, and make the rear seat 3.1 and the middle seat Plate 2.1 is on the same plane, use long pin 8 to pass through the second pin hole 2.10 on the middle seat plate assembly 2 and the long pin hole 3.4 on the rear seat plate assembly 3, at this time the retaining shaft 3.3 is stuck on the rear U-shaped frame 2.8 Position the middle seat plate 2.1 and the rear seat plate 3.1 to form the supine plate surface to form assembly B, as shown in Figure 4.

Step 3: Connect the connecting shaft sleeve 4.2 on the cushion assembly 4 with the connecting shaft 3.5 on the rear seat assembly 3 on the assembly B to form a cushion-type supine board assembly C, as shown in FIG. 1 .

Step 4: Connect the gourd buckles 5.3 of the two pull cord assemblies 5 to the two U-shaped rings 1.3 on the outrigger assembly 1 to form a complete supine board, as shown in FIG. 5 .

The other steps in the above-mentioned installation steps remain unchanged, and only the second step is changed to: Insert one end of the back seat bottom beam 3.2 with the stop shaft 3.3 between the two side walls of the rear U-shaped frame 2.8 on the middle seat plate 2.1, and make The rear seat plate 3.1 is perpendicular to the middle seat plate 2.1, and the long pin 8 passes through the first pin shaft hole 2.9 on the middle seat plate assembly 2 and the long pin hole 3.4 on the rear seat plate assembly 3. At this time, the retaining shaft 3.3 is stuck on the rear U In the retaining shaft groove 2.7 of the shape frame 2.8, the middle seat plate 2.1 and the rear seat plate 3.1 are positioned in the form of a fitness chair, as shown in Figure 6.

When folding: pull out the pin shaft 6 at the joint between the outrigger assembly 1 and the center seat assembly 2 of the assembled complete supine board (as shown in Figure 5) or the complete fitness chair (as shown in Figure 6), and pull out the center seat Pull out the long pin shaft 8 at the connection between the board assembly 2 and the back seat assembly 3, then rotate the outrigger assembly 1 above the center seat assembly 2, rotate the back seat assembly 3 above the outrigger assembly 1, and finally place the seat cushion assembly 4 Rotate to the top of the rear seat board assembly 3, and the supine board or fitness chair is folded into a folded storage state, as shown in FIG. 7 .

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples. Those of ordinary skill in the art, within the essential scope of the present utility model, make changes, modifications, additions or Replacement should also belong to the protection scope of the present utility model.

Claims (10)

1. a kind of portable folding board for lying on back, including leg assembly, board for lying on back component, which is characterized in that the board for lying on back component Including middle seat component, recoil board group part and cushion component, the leg assembly includes pillar, gear leg and pillar bottom bar, institute It states gear leg to be arranged on pillar, the pillar bottom bar is arranged in the bottom of pillar and vertical with pillar；The middle seat component One end and the upper end of pillar be that adjustable-angle be flexibly connected, the other end is that adjustable-angle is movable with recoil board group part one end Connection, the other end of the recoil board group part are that adjustable-angle is flexibly connected with the cushion component；The middle seat component It is combined into board for lying on back plate face with recoil board group part, the cushion component landing is used as cushion.

2. portable folding board for lying on back described in accordance with the claim 1, which is characterized in that the pillar of the leg assembly is one Square tube is provided with the branch stud bolt hole of perforation square tube in its lower end, the branch pin of perforation square tube is provided with above branch stud bolt hole Axis hole；The middle seat component includes middle seat and two middle seat bottom girders, two middle seat bottom girders in seat it is front and back Direction gauge is fixed in the middle part of the bottom surface of middle seat, is arranged between two middle seat bottom girders of one end that leg assembly is connect U-shaped frame before one is provided with upper pin hole and lower bolt hole on the two side of the preceding U-shaped frame；In two of preceding U-shaped frame both sides Handrail vertical with middle seat bottom girder and parallel with middle seat bottom surface is respectively arranged on seat bottom girder；By the upper end of the pillar It is inserted among the two side of the preceding U-shaped frame, lower bolt hole and the lower rod end on preceding U-shaped frame two side is passed through with bolt Branch stud bolt hole, be used in combination nut to fix, make the supporting leg and middle seat can be with rotary folding；It is passed through with axis pin in open configuration The pillar pin shaft hole in upper pin hole and lower rod end on preceding U-shaped frame two side makes the supporting leg be fixed into centainly with middle seat Angle constitutes assembly A.

3. portable folding board for lying on back according to claim 2, which is characterized in that the middle seat component with it is described U-shaped frame after setting one, each in the two side upper end of rear U-shaped frame between two middle seat bottom girders of one end of recoil board group part connection Open a gear shaft slot, opened up on two middle seat bottom girders perforation two middle seat bottom girder side walls the first pin shaft hole and Second pin shaft hole；The recoil board group part includes rear seat and recoil board bottom beam, and the recoil board bottom beam is a square tube, along rear The front-rear direction of seat is fixed in the middle part of the bottom surface of the rear seat, is being connect on the recoil board bottom beam of one end with middle seat component Open up long pinhole, close to the long pinhole recoil board bottom beam bottom surface on fix one it is vertical with bottom girder and with recoil board bottom face Parallel gear shaft, the length of the gear shaft are more than the spacing of two gear shaft slots on middle seat component；By the recoil board bottom Beam has one end of gear shaft to be inserted between the two side of the rear U-shaped frame, and makes the rear seat and middle seat board in the same plane, With the long pinhole on the second pin shaft hole and recoil board group part having strong market potential on middle base plate assembly, make the gear shaft card in the rear The rear side of U-shaped frame positions middle seat board and rear seat to form board for lying on back plate face, constitutes assembly B.

4. portable folding board for lying on back described in accordance with the claim 3, which is characterized in that seat component and the seat in the rear Pad assembly, which connects, is arranged a connecting shaft vertical and parallel with recoil board bottom face with recoil board bottom beam on the recoil board bottom beam of one end； Side setting in the seating pad of one end that the cushion component is connect with recoil board group part and the connection on the board group part of recoil The matched connecting bushing of axis；By the connecting bushing and the connection axis connection, cushion type board for lying on back assembly C is formd.

5. according to claim 1-4 any one of them portable folding board for lying on back, which is characterized in that be also configured with two drawstrings Component, the lanyard assembly include that drawstring, draw ring and cucurbit are buckled, and one end of the drawstring connects the cucurbit and buckles, and the other end connects The draw ring is connect, one U-loop is respectively set at the both ends of the pillar bottom bar；The cucurbit of two lanyard assemblies is buckled and is connected respectively to In U-loop on pillar bottom bar both ends, the board for lying on back of complete function is formd.

6. according to the portable folding board for lying on back described in claim 3 or 4, which is characterized in that board group part and middle seat board in recoil When component connects, in thering is one end of gear shaft to be inserted on recoil board bottom beam after seat board between the two side of U-shaped frame, and make the recoil Plate is vertical with middle seat board, and the long pinhole on the first pin shaft hole and recoil board group part on middle base plate assembly is passed through with long pin shaft, will The gear shaft card in the gear shaft slot of U-shaped frame, makes the middle seat board be positioned with rear seat in the rear, forms ab lounge form.

7. according to claim 1-4 any one of them portable folding board for lying on back, which is characterized in that the leg assembly The bolt fixing hole of multiple and different height is provided on pillar, the gear leg is fixed by bolts to the bolt fixing hole of different height Middle stepping adjusts the height of the gear leg.

8. portable folding board for lying on back according to claim 6, which is characterized in that set on the pillar of the leg assembly It is equipped with the bolt fixing hole of multiple and different height, the gear leg is fixed by bolts to stepping tune in the bolt fixing hole of different height Save the height of the gear leg.

9. according to claim 1-4 any one of them portable folding board for lying on back, it is characterised in that the leg assembly Pillar upper edge short transverse is provided with a long slot bore, and the different location that gear leg is fixed by bolts to long slot bore on the pillar is continuous Adjust the height of the gear leg.

10. portable folding board for lying on back according to claim 6, it is characterised in that the pillar upper edge of the leg assembly Short transverse is provided with a long slot bore, gear leg be fixed by bolts to long slot bore on the pillar different location continuously adjust it is described Keep off the height of leg.