CN101468655B - Wheel brake - Google Patents

Abstract

The invention relates to a safe and reliable floor brake. The locking pedal lever and the unlocking pedal lever do not intersect, and even if fingers and objects enter between the locking pedal lever and the locking releasing pedal lever, they are not clamped by force. The ground brake includes a support portion with a plate-shaped support portion at the upper end, which is biased upward and can be stretched; a substantially “く”-shaped locking pedal lever is hinged on the support portion by a first pin, and extends forward and backward across the support portion , on its rear end side, a locking pin that can be engaged with the bracket portion is installed, and a pedal portion is installed on its front end side; the lock release pedal lever is arranged side by side on the outside of the locking pedal lever, and its rear end side is controlled by the second The pin is hinged on the inside of the above-mentioned support part; the connecting piece between the above-mentioned 2nd pin and the locking pin.

Description

floor brake

technical field

The present invention relates to an improvement of a floor brake for fixing a wheelbarrow equipped with a wheel portion such as casters at a desired position.

Background technique

In the past, the ground brake, for example, as shown in No. 53-52767, includes: a cylindrical bracket; a pressure rod lifting body that can be lifted coaxially with respect to the cylindrical bracket; A compression spring that biases the lifting body of the pressing rod upward; a shaft protruding outward from the shaft end that is arranged transversely to the above-mentioned bracket; a locking pedal rod that is freely swingably connected around the above-mentioned shaft, and has a The pedal part has the first pin parallel to the above-mentioned axis at the other end, and also includes a ㄑ-shaped arm formed between the above-mentioned pedal part and the first pin; The second pin is arranged parallel to the first pin through the bearing receiving piece at the bottom; the L-shaped lock release is formed parallel to the locking pedal lever by fitting the first pin and the second pin, and arranged parallel to the above-mentioned locking pedal lever pole. With the stepping action of the above-mentioned locking pedal, the pressure rod lifting body and the bracket are extended through the connecting piece. From this state, the first pin passes through the connection line between the second pin and the shaft, and the first pin of the locking pedal rod and the pressure rod When the lever lifts the body side contact, it becomes the locked state. When locking, the pedal member of the unlocking pedal lever rises, and when the lock is released, since the pedal member of the unlocking pedal lever is at a high position, the operator can easily operate it.

At this time, the lock release pedal lever is hinged at two positions of the first pin and the second pin, and rotates in the forward direction and the reverse direction with the second pin as a fulcrum during operation, so the first pin is displaced in conjunction with this, The lock release pedal lever is also displaced at the same time.

Since the lock pedal lever and the lock release pedal lever are arranged side by side, during operation, the lock pedal lever and the lock release pedal lever cross in opposite rotational directions.

In particular, when the lock is released, the spring force of the compressed spring is large, and there is a fear that the pedal levers may be caught because the pedal levers cross each other.

In consideration of the above, an arc-shaped elongated hole that allows rotation in the stepping direction of the lock-release pedal lever is formed on the lock-release pedal lever, and the position of the lock-release pedal lever is kept at almost the same position, but the lock-release pedal lever The position is almost constant, and when the lock is released, the same problem still exists due to the overlapping of the locking pedal lever and the locking releasing pedal lever.

The inventor of the present invention proposed a floor brake in Japanese Patent Application Laid-Open No. 2006-240504. The release pedal lever and the connecting piece are not directly linked, and the article is not clamped strongly when the lock is released. The ground brake includes: a bracket part, the upper end of which has a plate-shaped support part and is biased upward and can be stretched; the locking pedal lever is hinged on the above-mentioned bracket part by the first pin, and at the same time, it extends forward and backward across the bracket part, and the rear A lock pin that can be engaged with the bracket part is installed on the end side, and a pedal part is installed on the front end side; the lock release pedal lever is arranged side by side on the outside of the lock pedal lever, and the rear end side is hinged to the above-mentioned supporting part by the second pin inside; the connecting piece located between the second pin and the locking pin and hinged with the second pin and the locking pin; the operation part protruding from the position where the locking release pedal lever can contact the connecting piece; A biasing member is located between the lock release pedal levers and biases the lock release pedal levers in a direction approaching the lock pin. The ground brake can achieve corresponding results.

Patent Document 1 Real Public Zhao No. 53-52767 refers to its Figure 1

Patent Document 1 Japanese Patent Laid-Open No. 2006-240504

Contents of the invention

The present inventors conducted further studies to provide a floor brake that reduces the size of the lock release pedal lever and the lock pedal lever, and at the same time forms the lock pedal lever into a roughly ㄑ shape. Pedal levers do not intersect, and fingers and objects are not strongly caught when the lock is released.

[Measures to solve the problem]

In order to solve the above-mentioned problems, the present invention includes in the ground brake of technical solution 1:

The bracket part includes a movable part with a supporting part at the upper end, and the movable part is biased upward relative to the fixed body part and can be stretched;

The locking pedal lever is hinged on the fixed part of the above-mentioned bracket part by the first pin in the middle part, and at the same time, its both ends extend forward and backward beyond the bracket part, and the rear end part is provided at a position higher than the above-mentioned first pin There is a locking pin, and a pedal part is installed on its front end;

The lock release pedal lever is located above the lock pedal lever, and its two ends extend forward and backward beyond the above-mentioned bracket part, the rear end part of which is hinged on the above-mentioned support part by the second pin, and the pedal part is installed on the front end part thereof ;

A pin receiving portion formed on the lower surface of the lock release pedal lever engages with the lock pin of the lock pedal lever when unlocking, and displaces the lock pin in the lock release direction;

A connecting piece, one end of which is fixed to the above-mentioned second pin, and the other end is hinged on the above-mentioned locking pin, and can swing with the above-mentioned second pin as a fulcrum;

a biasing member that biases the above-mentioned lock release pedal lever at the standby position in the upward direction,

The lock pin is displaceable to a lock position located in front of a connection line between the first pin and the second pin, and a lock release position located behind the connection line.

In the invention of technical scheme 2, it is characterized in that:

The bracket part is composed of a movable part and a body part,

The body part is composed of a base part, a leg part erected on the base part, and an inner cylinder part supported on the leg part,

The movable part is composed of an outer tube part that is overlaid on the inner tube part and can slide freely up and down. The plate-shaped support part is fixed on the outer tube part.

A first spring biasing the bracket portion in the shortening direction is provided between the support portion and the first pin fixed to the inner tube portion.

In the invention of technical scheme 3, it is characterized in that:

The connecting piece is formed into a substantially U-shaped cross-section consisting of a pair of left and right side plates and an upper connection piece connecting the pair of side plates above. The upper parts of the left and right side plates are hinged on the second pin, and The lower part of the plate is hinged on the locking pin,

The hinge position of the second pin is arranged inside the hinge position of the unlocking pedal lever and the second pin.

Invention effect

In the present invention, the locking release pedal lever is slightly tilted to displace the locking pin from the front of the connecting line between the first pin and the second pin to the rear of the connecting line between the first pin and the second pin, so that the locking pedal lever can be displaced from the locked position to the unlocked position.

Therefore, when operating, since the lock release pedal lever and the lock pedal lever do not intersect, there is no need to worry about pinching fingers, objects, etc. between the lock release pedal lever and the lock pedal lever, and when the lock is released, due to the lock The release pedal lever and the lock pedal lever are not interlocked, so the safety is high.

Moreover, since there is no need to use long holes as in the prior art, the product does not shake and has excellent stability.

In the present invention, when the lock is unlocked, the lock release pedal lever and the lock pedal lever are not interlocked, and when the lock is locked, the lock release pedal lever operates the lock pin of the lock pedal lever. Even if the operation stroke of the lock release pedal lever is small, the Lock and unlock the locking pedal lever.

Description of drawings

Fig. 1 is a partial cross-sectional view of an unlocked state of an embodiment of a floor brake according to the present invention.

Fig. 2 is a side view showing a locked state of the floor brake shown in Fig. 1 .

Fig. 3 is a side view when the lock release pedal lever is manipulated to unlock from the locked state shown in Fig. 2 .

Fig. 4 is a side view of the ground brake shown in Fig. 2 in an unlocked state.

Fig. 5 is a plan view of the unlocked state of the ground brake shown in Fig. 2 .

Fig. 6 is a front view of the unlocked state of the ground brake shown in Fig. 2 .

Fig. 7 is a front view showing the connection of the unlocking pedal lever, the connecting piece, and the locking pedal lever of the floor brake shown in Fig. 1 .

[Description of Reference Signs]

1 Floor brake 2 Support part 3 Bracket part 4 Lock pedal lever 5 Lock and release pedal lever

6 connecting piece 21 bracket 31 base part 32 leg part 33 inner cylinder part 34 outer cylinder part

35 ball seat 36 spring bracket 37 compression spring 41 rod body 42 pedal part 51 release pedal body 52 pedal part 61 side plate 62 connecting piece S1 first spring S2 spring

Detailed ways

Hereinafter, preferred embodiments of the floor brake of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]

The ground brake 1 shown in Figures 1 and 2 includes: a support portion 2 with a plate shape at the upper end and a support portion 3 that is biased upward and can be telescopic, a locking pedal lever 4 hinged on the support portion 3, and arranged side by side on the support portion 3. The unlocking pedal lever 5 whose outer side and rear end side of the locking pedal lever 4 is hinged to the inside of the support part 2 , and the connecting piece 6 which is bridged between the front end of the locking pedal lever 4 and the inner surface of the support part 2 and is hinged.

In addition, in this embodiment, the left side in the figure is taken as the front, and the right side is taken as the rear.

[stand part]

The stand portion 3 is composed of a movable portion and a non-movable body portion. The main body part is composed of a base part 31 , a leg part 32 erected on the base part 31 , and an inner cylinder part 33 supported by the leg part 32 .

The movable portion is constituted by an outer cylinder portion 34 that is fitted over the inner cylinder portion 33 and is slidable up and down, and the plate-shaped support portion 2 is fixedly installed on the outer cylinder portion 34 .

The base part 31 has a ball seat 35 on the upper surface, and a compression spring 37 is built between a spring bracket 36 provided at the lower end of the inner tube part 33 and the ball seat 35 to rotatably support the base part 31 .

A coil spring S1 as a first biasing member is built between the inner cylinder portion 33 and the outer cylinder portion 34 .

The upper end of the coil spring S1 is hooked on the top surface of the outer cylindrical portion 34 fixed to the support portion 2 , and the lower end is hung on the first pin P1 penetrating the inner cylindrical portion 33 horizontally.

Therefore, when the inner cylinder part 33 is pushed down, the coil spring S1 is opened to increase the elastic force, and at the same time, the inner cylinder part 33 protrudes from the outer cylinder part 34, and the bracket part 3 is elongated as shown in FIG. 2 .

Also, a semicircular notch 34a is formed on the lower end edge of the outer cylinder 34, and when raised, fits with the first pin P1 protruding from the inner cylinder 33, whereby the inner cylinder 33 rises by a predetermined stroke.

[Lock Pedal Lever]

Then, the locking pedal lever 4 is installed at a midway position of the above-mentioned bracket part 3 , and the middle part of the locking pedal lever 4 is hinged to the first pin P1 and extends forward and backward beyond the bracket part 3 .

In this embodiment, the locking pedal rod 4 is composed of a pair of left and right rod bodies 41 sandwiching the bracket part 3, a locking pin P3 straddling between the rear ends of the pair of rod bodies 41, and a pair of rod bodies 41 straddling. The pedal part 42 is formed between the front ends of the rod body 41. The rod body 41 has a substantially U-shape, and the bent portion is hinged to the above-mentioned first pin P1 and extends upward.

The lock pin P3 is provided on the rear end side of the lock pedal lever 4 and is always located above the first pin P1.

As will be described later, when the pedal portion 42 of the locking pedal lever 4 is stepped on to extend the bracket portion 3, the above-mentioned lock pin P3 engages with the outer peripheral wall of the outer tube portion 34 of the bracket portion 3, and the reverse direction of the locking pedal lever 4 is applied. The rotation is locked, and the extended state of the bracket part 3 is maintained.

Both ends of the first pin P1 protrude outward from the inner cylinder 33 of the bracket portion 3 and are hinged to positions below the central bent portions of the pair of lever bodies 41 of the lock pedal lever 4 .

[Lock release pedal lever]

The unlocking pedal levers 5 are arranged side by side outside the lever body 41 on one side of the locking pedal lever 4 .

In the situation shown in the figure, the lock release pedal lever 5 is formed by a rod-shaped release pedal body 51 arranged on one side of the bracket part 3, and the front of the release pedal body 51 is bent and connected to the pedal of the lock pedal lever 4. The part 42 is separated from the pedal piece part 52 extending outward.

Reference numeral 55 denotes a stopper that engages with the back of the support portion 2 and controls rotation of the unlocking pedal lever 5 in the clockwise direction in the drawing, and 56 denotes a stopper that controls rotation in the counterclockwise direction in the drawing.

The rear end side of the unlocking pedal lever 5 is hinged to a bracket 21 protruding from the rear surface of the support portion 2 via a second pin P2.

[Connecting piece]

Then, both ends of the connecting piece 6 are hinged to the above-mentioned lock pin P3 and the second pin P2.

The connecting piece 6 has the following structure. A pair of left and right side plates 61 are connected by an upper connecting piece not shown in the figure, and the cross section is formed into a substantially U-shaped shape. The upper parts of the left and right side plates 61 are hinged on the second pin P2, and the lower parts Hinged to locking pin P3.

The second pin P2 is horizontally spanned between a pair of left and right brackets 21 hanging down on the back of the support portion 2, and protrudes outward.

Then, on the outside of the bracket 21, at first, the left and right pair of upper parts of the connecting piece 6 are hinged on the second pin P2, and on the outside, the front end side of the above-mentioned lock release pedal lever 5 is hinged on the second pin P2, and the connecting piece 6 is hinged on the second pin P2. The hinge position with respect to the 2nd pin P2 is provided in the inner side of the hinge part of the unlocking pedal lever 5. As shown in FIG.

[spring]

A biasing member biased at the lock standby position is provided on the above-mentioned lock release pedal lever 5 .

In this embodiment, a coil spring S2 wound around the second pin P2 is attached, one end of which is hung inside the support portion 2, and the other end is hung on the upper portion of the lock release pedal lever 5 described above. The unlocking pedal lever 5 is biased at a standby position where the unlocking pedal lever 5 is in a substantially horizontal posture.

[Positional relationship of the pin]

The first pin P1 is fixed to the inner cylinder portion 33 , and the second pin P2 is fixed below the support portion 2 , but the positions of the first pin P1 and the lock pin P3 are changed by expansion and contraction of the bracket portion 3 .

The lock pin P3 is displaced relative to the connecting line L between the first pin P1 and the second pin P2, and when it reaches the line L, the biasing force exerted by the coil spring S1 built in the bracket part 3 is at a dead point. , by crossing this line L, the biasing force acts in the exceeding direction.

Thus, as described above, if the locking pedal lever 4 is in the locked position of FIG. 2 , the locking pin P3 crosses the above-mentioned dead point and displaces to its front position, and since it is biased in the locking direction, the locking pedal lever 4 can maintain the locked posture.

At this time, the outer cylinder portion 34 acts as a stopper, and the lock pin P3 cannot be further displaced forward beyond the stopper.

A step-shaped notch for receiving a pin that engages with a lock pin P3 of the lock pedal lever 4 when locked is provided on the lower surface of the lock release pedal lever 5 , and constitutes an operation portion 13 .

In the locked posture shown in FIG. 2 , when the unlocking pedal lever 5 is stepped on to the position indicated by the dotted line in the figure, the operating portion 13 formed at the lower end of the unlocking pedal lever 5 pushes the lock pin P3.

As a result, the connecting piece 6 rotates counterclockwise in the drawing with the second pin P2 as a fulcrum.

By the rotation of the connecting piece 6, the lock pin P3 crosses the line L between the above-mentioned P1-P2 and moves backward (see FIG. 3 ).

And at the same time, by the operation of the connecting piece 6, the locking pedal lever 4 rotates in the clockwise direction in the figure with the first pin P1 as a fulcrum, and the pedal part 42 is displaced to the unlocking position which is almost the same as or higher than the unlocking pedal lever 5. (Refer to Figure 1).

And, if the pedal part 42 of the lock pedal lever 4 is stepped down from the unlocked position, the connecting piece 6 will move, and once the lock pin P3 crosses the line L between the above-mentioned P1-P2, as shown in FIG. The locking pedal lever 4 is biased counterclockwise in the drawing.

Then, the lock pin P3 engages with the outer cylindrical portion, and the position of the lock pedal lever 4 can be locked.

In this embodiment, although the pedal portion 52 of the unlocking pedal lever 5 is close to the support portion 2, the tilting angle for unlocking is also small.

Thereby, when the lock release lever 5 rotates and the lock lever 4 is unlocked, the lock release lever 5 and the lock lever 4 do not intersect.

In addition, when unlocking, the unlocking pedal lever 5 is biased by the coil spring S2 only at the position of the second pin P2 serving as the rear end pivot, and the operation is not restricted by the locking pedal lever 4 .

Moreover, in this embodiment, the locking pedal lever 4 is formed into a ㄑ shape with a downwardly recessed center, and there is no need to worry about pinching fingers or the like due to a relatively large distance from the support portion 2 all the time.

Also as shown in the example of FIG. 2 , since the tilting angle of the unlocking pedal lever 5 is small, it is difficult to pinch a finger, an object, etc. between the locking pedal lever 4 and the unlocking pedal lever 5 .

Even if fingers are caught, the connecting piece 6 is rotated with the second pin P2 as a fulcrum, and the locking pedal lever 4 is rotated in a direction away from the unlocking pedal lever 5 .

Thus, when stepping on the pedal portion 52 of the unlocking pedal lever 5, and in conjunction with this, when the pedal portion 42 of the locking pedal lever 4 jumps up, even if a finger enters the pedal portion 52 of the unlocking pedal lever 5, it will not It will be sandwiched between the unlocking pedal lever 5 and the locking pedal lever 4.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various design changes can be made according to the application without departing from the spirit of the present invention.

Claims (3)

1. wheel brake comprises:

Cradle portion comprises that the upper end has the movable part of support, and described movable part upwards is biased and flexible with respect to the body that is fixed;

The locking pedal-rod, it partly is hinged on the fixed part of above-mentioned cradle portion by the 1st pin midway, and simultaneously, its two ends are crossed cradle portion and extended along front and back, in its back-end in the section than above-mentioned the 1st the pin top location be provided with stop pin, at its leading section tread portion is installed;

The latch-release pedal-rod is positioned at the top of this locking pedal-rod, and its two ends are crossed above-mentioned cradle portion and extended along front and back, and rearward end wherein is hinged on the above-mentioned support by the 2nd pin, on the leading section therein tread portion is installed;

The pin acceptance division, its be formed on this latch-release pedal-rod below, when unlocking, engage with the stop pin of above-mentioned locking pedal-rod, make stop pin to the displacement of latch-release direction;

Connecting strap, one end are fixed in above-mentioned the 2nd pin, and the other end is hinged on the above-mentioned stop pin, can be take above-mentioned the 2nd pin as a spot wobble;

Biasing member, its position of readiness in upward direction is setovered to above-mentioned latch-release pedal-rod,

Above-mentioned stop pin can be indexed to the latched position in the place ahead that is positioned at above-mentioned the 1st pin and the 2nd connection lead of selling and be positioned at the latch-release position at the rear of connection lead.

2. wheel brake as claimed in claim 1, it is characterized in that: above-mentioned cradle portion is made of movable part and body,

Body by base portion, vertical be located at the leg section on this base portion, the inner cylinder portion that is supported on this leg section consists of,

Movable part is made of the urceolus section that is enclosed within on this inner cylinder portion outward and but easy on and off slides, and described support is tabular support, and it is installed in this urceolus section,

The 1st spring that edge shortening direction is setovered to cradle portion is arranged on above-mentioned tabular support and is fixed between the pin of the 1st on the inner cylinder portion.

3. wheel brake as claimed in claim 1, it is characterized in that: above-mentioned connecting strap forms by pair of right and left side plate, the top that up above-mentioned pair of side plates linked to each other and is connected with the roughly shape of コ word shape of section that sheet forms, the upper articulation of left side plate is on the 2nd pin, the lower hinge of left side plate is on stop pin, and the articulated position of above-mentioned the 2nd pin is configured in the inboard of the articulated position of latch-release pedal-rod and the 2nd pin.

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