JPH03213441A - Seat with adjusting mechanism - Google Patents

Abstract

PURPOSE:To facilitate a change of a seat position with a simple structure by connecting an upper frame and a lower frame via a deformable specific X- shaped link mechanism so as to be capable of being elevated or lowered and capable of changing its seat angle. CONSTITUTION:In a seat with an adjusting mechanism in which both the height and the seat angle are simultaneously adjustable, in an operator's seat of a construction machine, the rear end side surface of an upper frame 1 and the front end side surface of a lower frame 2 are connected with a link 3, and also the rear end side surface of the lower frame 2 and the central part of the link 3 are connected with a link 5. Further, the front end side surface of the upper frame 1 and the central part of the link 3 are connected with a link 4; and the link pins 13, 7 provided on the upper end part of the link 4 and the lower end part of the link 3 respectively are slidably engaged with the adjusting grooves 14, 8 formed in the respective frames 1, 2. And the respective pins 13, 7 are locked by engagedly inserting them in any of the engaging holes in the locks 15, 9 which have been supported by the respective frames 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seat with an adjusting mechanism, and in particular to a height and seat angle (hereinafter referred to as seat angle) used as an operator seat for construction machinery such as a hydraulic excavator. This invention relates to a sheet with an adjustment mechanism that allows adjustment of the angle (referred to as corner).

BACKGROUND OF THE INVENTION Hydraulic excavators are equipped with an operator seat with various adjustment mechanisms. Although seat height adjustment mechanisms and seating angle adjustment mechanisms have conventionally existed in these operator seats, they are independent mechanisms. Recently, seats with an adjustment mechanism that allow simultaneous adjustment of the seat height and seating angle have also been used.

The seat with the adjustment mechanism shown in Fig. 5 has two seats each in the front and rear.
A total of four links are placed on the left and right sides of the seat, making it possible to adjust the seat height and U-seating angle. In FIG. 5, the front end side surface of the upper frame 21 and the front end side surface of the lower frame 22 are connected by a link (A) 23, and the center part of the link (A) 23 and the front end side surface of the upper frame 21 are connected by a link (A) 23. D) Connected by 24. Similarly, the rear end side surface of the upper frame 21 and the rear end side surface of the lower frame 22 are connected by a link (B) 25, and further, the center part of the link (B) 25 and the rear end side surface of the lower frame 22 are connected to each other.
1 is connected to the rear end side surface by a link (C) 26. Adjustment grooves 27 and 28 are bored in the side surfaces of the upper frame 21 and lower frame 22, respectively, and the links (
A) 23 upper end pin (G) 29 and link (B) 25
The pin (H) 30 at the upper end can slide within the adjustment groove 27, and the pin (C) 31 at the lower end of the link (A) 23 can slide within the adjustment groove 28.
It is possible to slide inside. Locks (A) 3 each having a plurality of wave-shaped recesses are provided at both ends of the adjustment groove 27.
2. A lock (B) 33 is rotatably attached, and a lock (A) 32. A coil spring 34 is installed between the locks (B) 33.

When the lock (A) 32 is released, the pin (G) 29 can slide in the adjustment groove 27 provided on the side surface of the upper frame 21, and by changing the position of the pin (G) 29, the link (D) 24 can be moved upward. A pin connected to the frame 21 (
E) The height of 36 changes. Furthermore, when the lock (B) 33 is released, the pin (H) 30 becomes able to slide within the adjustment groove 27, and by changing the position of the pin (H) 30, the pin that connects the link (C) 26 to the upper frame 21. (
F) The height of 36 changes. Therefore, the adjusted pin (E)
The height and seating angle of the seat are determined by the change in height between the seat 35 and the pin (F) 313.

FIG. 5 shows a state in which the seat height is at its highest position and the seat angle is 0 degrees, that is, the seat surface is horizontal.

6 to 8 are explanatory diagrams showing changes in seat height and seating angle due to adjustment of the seat with the above-mentioned adjustment mechanism, and locks (A) and (B) are omitted. FIG. 6 shows the case where the seat is in the lowest position and the seating angle is 0 degrees, and FIGS. 7 and 8 show the case where the seating angle is adjusted to the maximum.

[Problems to be Solved by the Invention] However, in the seat with the adjustment mechanism of the above structure, a total of four links are used, two on each side of the seat on one side of the seat, so the structure is complex and the number of parts is low. There are 8 links and 16 connecting pins per unit.
The number of books has increased, which has a negative impact on manufacturing costs.

The present invention has focused on the above-mentioned conventional problems, and an object of the present invention is to provide a seat with an adjustment mechanism that has a simple structure and can easily adjust the height and seating angle of the seat.

[Means for Solving the Problems] In order to achieve the above object, the seat with an adjustment mechanism according to the present invention connects the rear end side surface of the upper frame and the front end side surface of the lower frame with a link (A), and Link the front end side surface and the center of the link (A) (B)
Also, the pin (A) that connects the rear end side surface of the lower frame and the center part to the link with the link (C), and the pin (A) that connects the front end side surface of the upper frame and the link (B), is drilled in the upper frame side surface. 5- The pin (D) connecting the front end side surface of the lower frame and the link (A) is slidable within the adjustment groove bored in the side surface of the lower frame, and the pin (D) connects the front end side surface of the lower frame with the link (A). A), (D)
Locks are provided on the sides of the upper frame and lower frame to fix the frame in the desired position.

[Operation] According to the above configuration, the upper frame and the lower frame are connected by three links (A), (B), and (C), and the connection part between the front ends of the upper and lower frames and the links is Since the frame can slide in adjustment grooves provided on each frame, by moving the connecting part between the lower frame and the link (A) in the front and back direction, the pin (B)
As the height changes, the sitting angle also changes. Further, by moving the connecting portion between the upper frame and the link (B) in the front-back direction, the upper frame rotates around the pin (B), and the seating angle changes. By combining these operations, the height and sitting angle of the seat can be adjusted.

6 [Example] Examples of the seat with an adjustment mechanism according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic left side view of the sea I with an adjustment mechanism. The upper frame 1 and the lower frame 2 have link (A) 3, link (B) 4, and link (C) 5 on both left and right sides, respectively. It is connected. The link (A) 3 has an upper end rotatably connected to the rear side surface of the upper frame 1 with a pin (B) 6, and a lower end with a pin (D) 7 attached to the link (A) 3. It penetrates an adjustment groove 8 bored in the side surface of the frame 2 and projects outward. Said pin (
D) 7 can freely slide within the adjustment groove 8. On the left side surface of the lower frame 2, a lock (B) 9 having a plurality of wave-shaped recesses is pivotally attached with a pin 10 so as to cover the adjustment groove 8 of the lower frame J12, and a pin (D) protruding from the adjustment groove 8. )7 can be fixed.

Further, the end of the lock (B) 9 opposite to the pin 10 is connected to the lower frame 2 via a coil spring 11.

Link (B) 4 connects the lower end with pin (C) 12 to link (A)
A pin (A) 13, which is rotatably connected to the upper frame 3 and whose upper end is attached to the link (B) 4, protrudes outward through an adjustment groove 14 drilled in the side surface of the upper frame 1. . The pin (A) 13 can freely slide within the adjustment groove 14. A lock (A) 15 having a plurality of wave-shaped recesses is pivoted on the left side surface of the upper frame 1 with a pin 16 so as to cover the adjustment groove 14 of the upper frame 1, and a pin protruding from the adjustment groove 14. (A) 13 can be fixed. Also, pin 16 of lock (A) 15
The opposite end is connected to the upper frame 1 via a coil spring 17.

Also, link (C) 5 is linked at the upper end with pin (C) 12 (
A) It is rotatably connected to 3, and the lower end is connected to lower frame 2.
It is rotatably connected to the pin (E) 1B.

In the seat with an adjustment mechanism configured as described above, FIG. 1 shows a state in which the seat height is at the highest position and the seating angle is 0 degrees, that is, the seat surface is horizontal. To lower the seat height, release the lock (B) 9 and slide the pin (D) 7 forward to lower the height of the pin (B) 6. Fix the position of pin (D) 7 with lock (B) 9, then release lock (A) 15, slide pin (A) 13 forward, and then lock (A) 15 at an appropriate position. Once it is fixed, the adjustment of the seat height and sitting angle is completed.

FIG. 2 shows the seat lowered to the lowest position by the above operation, and FIGS. 3 and 4 show the seat angle adjusted to the maximum. However, in Figures 2 to 4, locks (A) and (B) are omitted.

[Effects of the Invention] As explained above, the present invention has a seat with an adjustment mechanism that has a simple structure consisting of three left and right links and five pins each. The number of parts has been significantly reduced to 3/4 in terms of the number of links and 5/8 in the number of pins.
Manufacturing costs can be reduced.

In addition, since the seat has a larger adjustment range for both height and antler than conventional seats with adjustable mechanisms, it is easier to adapt the seat position to the physique and driving posture of the construction machine operator, making the seat easier to use.

[Brief explanation of drawings]

Figures 1 to 4 are explanatory views of the left side of the seat with an adjustable mechanism according to the embodiment. When the height is set to the lowest position and the seat angle is 0 degrees, Figure 3 shows the seat tilted forward, and when the seat angle is set to the maximum, Figure 4 shows the seat tilted back. The figure shows the case where the seat angle is set to the maximum after adjustment. Figures 5 to 8 are explanatory views of the left side of a seat with an adjustment mechanism according to the conventional technology. When the seat angle is set to the lowest position and the seat angle is 0 degrees, Figure 7 shows the seat tilted forward, and when the seat angle is set to the maximum, Figure 8 shows the seat tilted back. The figure shows the case where the seat angle is set to the maximum. Figures 2 to 4 and 6 to 8 are locks (A);
(B) has been omitted. 1... Upper frame 2 battle... fight ◆◆ Lower frame 3... Link (A) 4... Link (B) 5... Link (C ) 7...Bin (D) 8.14...Adjustment groove 9...Lock (B) 13...Bin (A) 15...・Lock (A)

Claims (1)

[Claims] The rear end side surface of the upper frame 1 and the front end side surface of the lower frame 2 are connected by a link (A) 3, and the front end side surface of the upper frame 1 and the center part of the link (A) 3 are connected by a link (B) 4. A link (C) 5 connects the rear side of the frame 2 and the center of the link (A) 3, and a pin (A) connects the front side of the upper frame 1 to the link (B) 4.
) 13 is an adjustment groove 14 bored on the side surface of the upper frame 1.
The pin (D) 7, which is slidable inside and connects the front end side surface of the lower frame 2 and the link (A) 3, is slidable inside the adjustment groove 8 bored in the side surface of the lower frame 2, and A seat with an adjustment mechanism, characterized in that a lock (A) 15 and a lock (B) 9 for fixing the pin (D) 7 at a desired position are provided on the sides of the upper frame 1 and the lower frame 2, respectively. .