JPH0667701B2 - Vehicle seat reversing support device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle seat reversing support device.

(Prior Art) In a vehicle such as a tractor, for example, when a work machine such as a backhoe is mounted behind the vehicle body to perform a predetermined work, the work is conventionally performed separately from a regular driving seat provided on the vehicle body. It was common to provide an operating seat on the machine side.

(Problems to be Solved by the Invention) In the past, two sheets were required, which was uneconomical. Further, when the working machine is mounted close to the vehicle body, the two seats may interfere with each other. Therefore, the working machine must be mounted away from the vehicle body so that the seats do not interfere with each other. There was also a problem in terms of weight balance between the front and rear.

The present invention has been made in view of such conventional problems, and an object thereof is to enable one sheet to be used by reversing it forward and backward.

(Means for Solving the Problem) As a means therefor, the present invention provides a parallel link mechanism that is swingable in the front-rear direction on the vehicle body 1 and biased in the standing direction.
A support base 37 is provided via 36, and the seat 15 is attached to the support base 37.
A lock pin that locks the swivel base 60 that supports the swivel base 60 around the vertical axis 61, and locks the swivel base 60 at the rotational position around the vertical axis 61.
68 is provided on the support base 37, and the locking pin 68 is provided on the support base 37, and the locking pin 68 is provided on the support base 37. When the parallel link mechanism 36 is erected through the 37 so as to be movable up and down, and the parallel link mechanism 36 is erected after the engagement tool 83 is disengaged, the lock pin 68 is swiveled in conjunction with the erection operation of the parallel link mechanism 36.
A release lever 78 for separating downward from 60 is pivotally attached to a support base 37 so as to be vertically swingable.

(Operation) Next, the operation will be described. The seat 15 is fixed in the state of solid lines in FIGS. 1 and 6 during normal operation of the loader work machine, and fixed in the state of phantom lines in FIGS. 1 and 6 during backhoe work.

In the solid line state, the support base 37 and the swivel base 60 are non-rotatably locked by the lock pin 68, and the engagement tool 83 is engaged with the engagement rod 52 of the parallel link mechanism 36. In this case, since the support base 37 and the like can be raised and lowered below the solid line seat height,
When the operator sits on the seat 15, the entire body descends, and the spring cover 92 of the suspension spring 90 is attached to the spring receiving portion of the fixed base 35.
It contacts 93 and the suspension action by spring 90 is obtained.

When the seat 15 is turned back and forth from the solid line state to the imaginary line state, first, the release handle 84 is pulled forward (the direction indicated by the arrow a in FIG. 1), and the engagement tool 83 is rotated around the pivot 82 in the direction indicated by the arrow b. Then, the seat 15 is turned to be disengaged from the engaging rod 52, and the locking of the seat 15 at the height of the solid line is released. Then, the front and rear links 38, 39 of the parallel link mechanism 36 are swung upward by the springs 53, 54 around the pivots 42, 43 in the directions indicated by arrows c and d, and the parallel link mechanism 36 is erected. Then, in the upright state, since the elastic engagement plate 59 engages with the engagement recess 58 of the positioning mechanism 57, the parallel link mechanism 36 is held in that state.

On the other hand, when the rear link 39 swings until it reaches the standing state,
The release rod 53a of the rear link 39 engages with the release lever 78 from above, and this release lever 78 pivots around the pivot 44 downward (indicated by arrow e in FIG. 3) against the spring 80, and the lock pin Since the 68 is pulled down as shown by the arrow f, the lock pin 68 is moved to the swivel base 60.
It disengages from the engaging hole 74 and unlocks the swivel base 60 with respect to the support base 37. This allows the swivel base 60 to swivel and is sufficiently lifted by the uprighting of the parallel link mechanism 36, so that it does not come into contact with the nearby levers.
The seat 15 can be turned to the rearward position.

When the seat 15 is turned upside down, the ball 72 of the positioning mechanism 67
Engages with the engagement hole 70 to position the swivel base 60. Next, when the parallel link mechanism 36 is tilted backward while resisting the springs 53 and 54, the release lever 78 is rotated upward by the spring 80, contrary to the above, so that the lock pin 76 is engaged with the engagement hole 75. To lock the swivel base 60 on the support base 37 so that it cannot swivel. Then, when the rear link 39 further abuts against the stopper 41, the engaging tool 83 engages with the engaging rod 51 of the parallel link mechanism 36,
The support base 37 is fixed so that it cannot move up and down, and the operation of reversing the seat 15 back and forth is completed. At the time of backhoe work, the operator sits on the seat 15 at this imaginary line position.

(Example) Hereinafter, the present invention will be described in detail with reference to the illustrated example.
The figure illustrates a case where a front loader 2 and a backhoe 3 are mounted in front of and behind the tractor body 1. In FIG.
The tractor body 1 has front wheels 4 and rear wheels 5, and a hydraulic device 6 at the rear. 7 is a bonnet and 8 is a handle. The rear wheel 5 is supported by the tractor body 1 via the rear axle case 9 and covered from the inside by a rear wheel fender 10. 11 is an awning device, a pair of left and right front columns
A roof 14 is supported by 12 and rear columns 13, and is attached to the tractor body 1 so as to cover a seat 15 arranged between the left and right rear wheel fenders 10 from above. The rear support column 13 also serves as a safety frame and is mounted on the rear axle case 9, and the front support column 12 is mounted on the rear wheel fender 10. The seat 15 is mounted on the tractor body 1 via a reversing support device 16 so as to be reversible in the front-rear direction.

The front loader 2 pivotally attaches a boom 18 to the upper ends of a pair of left and right masts 17 so that the boom 18 can move up and down, and a bucket 19 pivotally attaches to the tip of the boom 18 so as to rotate the mast 17 and the booms.
A boom cylinder 20 is interposed between the boom cylinder 18 and the bucket cylinder 21, and a bucket cylinder 21 is interposed between the boom 18 and the bucket 19. mast
17 is a mounting base 22 provided at the center of the tractor body 1,
The front end of the brace 23 extending forward from the mast 17 is detachably attached to the bracket 24 at the front end of the tractor vehicle body 1.

The backhoe 3 is removably mounted on the tractor body 1 via a mounting mechanism 25. The backhoe 3 is a machine frame 26,
The swing frame 27, the boom 28, the arm 29, the bucket 30, the boom cylinder 31, the arm cylinder 32, the bucket cylinder 33, the control box 34, and the like.

The reversing support device 16 for supporting the seat 15 is shown in FIGS.
It is configured as shown in the figure. That is, FIG. 1 and FIG.
In the figure, reference numeral 35 denotes a plate-like fixed base, which is fixed to the tractor vehicle body 1 through a hydraulic device 6 and the like.
A support base 37 is provided via a parallel link mechanism 36 that can be inverted and rocked in the front-rear direction. The parallel link mechanism 36 includes a pair of left and right front links 38 and a rear link 39. The front link 38 and the rear link 39 have pivot shafts 42, 43 on a pair of left and right side plates 40 of which one end is mounted on the fixed base 35. And the other end is pivotally supported at the rear end of the support base 37 by pivots 44 and 45, respectively.

In the forward position, the support base 37 is a fixed base as shown by the solid line in FIG.
It is located at a low position, which is slightly separated from 35, and at the rearward position, it is located at a high position in line with the backhoe 3 side as shown by a virtual line in the figure. At the rearward position, the rear link 39 of the parallel link mechanism 36 contacts the stopper 41 provided between the pair of left and right side plates 40. The stopper 41 is formed by bending a strip plate into a V shape, and connects the left and right side plates 40 to each other to reinforce each other. A pair of left and right front links 38 and rear links 39
In between, spring hooking rods 49, 50 and engaging rods 51, 52 are attached,
A release rod 53a is attached between the rear links 39 near the pivot 45. Spiral springs 53, 54 are fitted around the pivots 42, 43. One end of each of the springs 53, 54 is a spring hook portion 55, 56 of the fixed base 35, and the other end is a spring hook rod 49, 50. The parallel link mechanism 36 is urged by these springs 53 and 54 so as to stand up. Meanwhile, the front link 38 and the support base
As shown in FIG.
A positioning mechanism 57 is provided for positioning in the upright state. The positioning mechanism 57 has an engagement recess 58 formed at the tip of the front link 38, and an elastic engagement plate 59 attached to the support base 37 so as to be engaged with and disengaged from the engagement recess 58.

Reference numeral 60 is a swivel base, and a vertical axis 61 is fixed to the central portion thereof as shown in FIGS. 1 to 3, and the vertical axis 61 is rotated only by a bearing boss 62 fixedly provided in the central portion of the support base 37. It is supported freely. Therefore, the swivel base 60 is rotatable about the vertical axis 61 with respect to the support base 37. A sliding plate 64 is provided on the swivel base 60 so as to be slidable forward and backward along a pair of left and right guide rails 63, and the seat 15 is mounted on the sliding plate 64 via a pivot 65 and cushion rubber 66. Has been. Support 37 and swivel 60
A positioning mechanism 67 for positioning the swivel base 60 at a position swiveled 180 degrees about the vertical axis 61 and a lock pin 68 for locking the swivel base 60 are provided. That is, the positioning mechanism 67
As shown in FIG. 5, two engaging holes 69, 70 formed in the swivel base 60 at point-symmetrical positions and the holding of the support base 37 so as to be engaged with and disengaged from one of the engaging holes 69, 70. Ball 72 in tube 71
And a spring 73 for urging the ball 72 upward.
The lock pin 68 has two engagement holes 7 formed at point symmetrical positions.
It is provided on the support base 37 via a guide tube 76 so as to be slidable up and down so as to be engaged with and disengaged from one of the 4, 75. The lock pin 68 has an engagement pin 77 at the lower end, and the engagement pin 77 is a release lever.
It is slidably inserted into the long hole 79 of 78. Release lever 78
Has a front end pivotally pivoted by a pivot 44 and a rear end extending rearward under the release rod 53a, and the release rod 53a is engaged when the parallel link mechanism 39 stands up. Then, by rotating downward, the lock pin 68 is pulled down, and the lock of the swivel base 60 with respect to the support base 37 is released. The release lever 78 is biased upward by a spiral spring 80 wound around the pivot 44.

An engaging member 83 is rotatably attached to the rear end of the swivel base 60 by a pivot 82.
Is attached to the parallel link mechanism 39.
The front and rear sides are engaged with each other to engage and disengage so as to prevent standing up. The front position is below the height of the solid line in FIG. 1, and the rear position is below the height of the imaginary line. In the following, the engaging rods 5 of the parallel link mechanism 36 are respectively arranged so as to allow the seat 15 to be lifted and lowered.
Engages freely with 1,52. Reference numeral 84 denotes a release handle for operating the engagement tool 83, which is disposed at the center of the front end of the swivel base 60. The release handle 84 is interlockingly connected to the engagement tool 83 via the interlocking rod 85 and the pin 86. Has been done. Interlocking rod 85
Is inserted into a pair of front and rear guide plates 87, 88 on the swivel base 60 so as to be slidable back and forth, and an engaging member 83 is provided at a rear end portion of the interlocking rod 85.
A spring 89 is biased to bias the spring in the engaging direction. A suspension spring 90 is attached to a spring receiving plate 91 that connects the pair of left and right front links 38, and a spring cover 92 made of synthetic resin or the like is fitted to the lower end of the spring 90. On the other hand, the fixed base 35 is provided with a spring receiving portion 93 so that the spring cover 92 contacts.

(Effects of the Invention) According to the present invention, the support base is provided via the parallel link mechanism 36 which is swingable in the front-back direction of the vehicle body 1 and biased in the standing direction.
A swivel for supporting the seat 15 is provided on the support 37.
60 is provided so as to be rotatable about the vertical axis 61, the swivel base 60 can be locked at the rotating position by the lock pin 68, and the standing up can be prevented by the engaging tool 83 when the parallel link mechanism 36 is tilted forward or backward. Therefore, the parallel link mechanism 36 is released by disengaging the engaging tool 83.
By standing up and turning the seat 15, one sheet 15 can be reversed and used.

Further, the lock pin 68 is a parallel link mechanism after the engagement tool 83 is disengaged.
When the 36 is erected, the release lever 78 is used to release the pedestal downward, and when the swivel base 60 is swung, it is lifted by the parallel link mechanism 36 (after the standing operation is completed). It is extremely easy to operate and can be turned without interfering with other members. Further, since the release lever 78 is pivotally attached to the support base 37 so as to be swingable up and down, and the lock pin 68 is operated by the swing motion of the release lever 78, the support base 37 does not rattle and the release lever 78 is released. Since the movement of the lever 78 is smooth and the support structure of the release lever 78 can be simplified, the durability of the release lever 78 is improved without deformation of the release lever 78.

[Brief description of drawings]

The drawings illustrate one embodiment of the invention,
The figure is a sectional side view of the main part, FIG. 2 is a bottom view of the same, FIG. 3 is a sectional side view at the time of standing, FIG. 4 is a sectional rear view, and FIG.
FIG. 6 is an enlarged view taken along the line V-V in the figure, and FIG. 6 is a side view of the whole. 1 ... tractor body, 2 ... front loader, 3 ... backhoe, 15 ... seat, 35 ... fixed base, 36 ... parallel link mechanism, 37 ... support base, 60 ... swivel base, 61 ... Vertical axis,
68 …… Lock pin, 78 …… Release lever, 83 …… Engaging tool,
84 …… Release handle, 90 …… Suspension spring.

Claims (1)

[Claims] 1. A support base (37) is provided on a vehicle body (1) via a parallel link mechanism (36) which is swingable in the front-back direction and biased in the standing direction, and the support base (37) is provided on the support base (37). Sheets (15)
A swivel base (60) for supporting the swivel is provided around the vertical axis (61), and a lock pin (68) for locking the swivel base (60) at a turning position around the vertical axis (61) is provided on the support base (37). ), The parallel link mechanism (36) has an engaging member (83) for engaging and disengaging in a state where the parallel link mechanism (36) is tilted forward or backward to prevent standing up, the lock pin (68) When the parallel link mechanism (36) is erected through the support base (37) so as to be vertically movable and stands up after the engagement tool (83) is disengaged, the lock pin (68) is interlocked with the standing operation of the parallel link mechanism (36). A seat reversing support device for a vehicle, characterized in that a release lever (78) for detaching (1) from the swivel base (60) is pivotally attached to a support base (37) so as to be vertically swingable.