JPH0285031A - Car seat inverting and supporting device - Google Patents

Abstract

PURPOSE:To provide possibility of using a single sheet once again upon inverting fore and aft by installing a supporting table through a parallel link mechanism, which can be inverted and swung in the direction fore and aft of the car body, and fitting this supporting table with a revolving table supporting sheet with possibility of revolving round a vertical shaft. CONSTITUTION:An invertive supporting device 16 to support a sheet is equipped with a supporting table 37 through a parallel link mechanism 36 capable of invertedly swinging in the direction of fore and aft on a plate-shaped stationary table to be fixed to the body 1 of tractor. This parallel link mechanism 36 is composed of a left and a right front link 38 and a rear link 39. A revolving table 60 supports a vertical shaft 61 fixed to its center with possibility of only rotating with a bearing boss 62 in the center of this supporting table 37, and the seat 15 is secured onto a slide plate 64 furnished slidably fore and aft along a left and a right guide rail 63 on this revolving table 60 through a pivot 65 and cushion rubber 66. The supporting table 37 and revolving table 60 are equipped with a lock pin to have locking and a locating mechanism 67 to make location of the revolving table 60 in the position 180 revolved round the vertical shaft 61.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat reversal support device for a vehicle.

(Prior Art) When a vehicle such as a tractor is used to carry out a specific task by attaching a working machine such as a backhoe to the rear of the vehicle, conventionally, the work equipment is attached to the back of the vehicle, in addition to the regular driver's seat installed on the vehicle. It was common to have a driver's seat on the side of the machine.

(Problems to be Solved by the Invention) Conventionally, two sheets were required, which was uneconomical. Additionally, if the work equipment is installed close to the vehicle body, the two seats may interfere with each other, so the work equipment must be installed at a distance from the vehicle body to prevent interference between the seats. There were also problems with front and rear weight balance.

SUMMARY OF THE INVENTION In view of these conventional problems, an object of the present invention is to enable a single sheet to be used by reversing it forward and backward.

(Means for Solving the Problems) As a means for solving the problem, the present invention provides a support base 37 on the vehicle body l via a parallel link mechanism 36 that is swingable in the longitudinal direction, and the seat 15 is attached to the support base 37. A swivel base 60 is provided to be able to freely rotate around a vertical axis 61, and a lock pin 68 for locking the swivel base 60 at a rotational position around the vertical axis 61 is provided on the support base 37, so that when the parallel link mechanism 36 is raised, The lock pin 68 is moved in conjunction with the rising movement of the parallel link mechanism 36.
The release lever 78 that separates the
It is pivoted to 7 so that it can swing vertically.

(Effect) Next, the effect will be explained. The seat 15 is fixed in the solid line state shown in FIGS. 1 and 6 during normal operation of the loader machine, and is fixed in the imaginary line state shown in FIGS. 1 and 6 during backhoe operation.

In the solid line state, the support base 37 and the swivel base 60 are locked so as not to rotate 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, the support stand 37 etc. can be raised and lowered below the seat height indicated by the solid line, so when the operator sits on the seat 15, the entire support stand 37 is lowered and the spring cover 92 of the suspension spring 90 is moved to the spring receiver of the fixed stand 35. 93, and the spring 9
Suspensilane action by 0 is obtained.

When reversing the seat 15 back and forth from the solid line state to the imaginary line state, first move the release handle 84 forward (a in Fig. 1).
direction), the engaging tool 83 is rotated around the pivot 82 in the direction indicated by the arrow b to remove it from the engaging rod 52, and the seat 15 is released from the seat 15 at the height indicated by the solid line. Then, the springs 53 and 54 cause the front and rear links 38 and 39 of the parallel link mechanism 36 to swing upward in the directions of arrows C and d about the pivot shafts 42 and 43, respectively, and the parallel link mechanism 36 stands up. When the parallel link mechanism 36 is in the upright state, the elastic engagement plate 59 engages with the engagement recess 58 of the positioning mechanism 57, so that the parallel link mechanism 36 is maintained in that state.

On the other hand, when the rear link 39 swings until it reaches the upright state, the release lever 53a of the rear link 39 engages the release lever 78 from above, and the release lever 78 moves downward around the pivot 44 against the spring 80. (arrow e in FIG. 3) and pulls down the lock pin 68 as shown by arrow f in FIG.
7. The swivel base 60 is unlocked. As a result, the swivel table 60 becomes freely rotatable, and the parallel link mechanism 3
Since the seat 15 is sufficiently raised by the rising of the seat 15, the seat 15 can be turned to the rearward position without coming into contact with nearby levers.

When the seat 15 is reversed back and forth, the ball 72 of the positioning mechanism 67 engages with the engagement hole 70 to position the swivel base 60. Next, while resisting the springs 53 and 54, the parallel link mechanism 3
6 backward, the release lever 7 will be released, contrary to the above.
8 is rotated upward by the spring 80, the lock pin 76 engages with the engagement hole 75 and locks the swivel base 60 to the support base 37 so as not to rotate. When the rear link 39 comes into contact with the stopper 41 after further tilting, the engagement tool 83 engages with the engagement rod 51 of the parallel link mechanism 36, and the support base 37 is fixed so that it cannot move up and down. The front/back flip operation is completed. During backhoe work, an operator sits on the seat 15 at this imaginary line position.

(Example) Hereinafter, the present invention will be described in detail with regard to the illustrated example.
The figure illustrates a case where a front loader 2 and a backhoe 3 are attached to the front and rear of a tractor body 1. In Figure 6,
The tractor body 1 has front wheels 4, 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 a rear axle case 9, and is covered from the inside by a rear wheel fender 10. Reference numeral 11 denotes a sunshade device, which supports a roof 14 by a pair of left and right front struts 12 and rear struts 13, and a seat 1 disposed between the left and right rear wheel fenders 10.
5 is attached to the tractor body 1 so as to cover it from above. The rear column 13 also serves as a safety frame,
It is attached to the rear axle case 9, and the front strut 12 is attached on the rear wheel fender 10. The seat 15 is attached to the tractor body l via a reversing support device I6 so as to be reversible back and forth.

The front loader 2 has a boom 1 pivotably attached to the upper ends of a pair of left and right masts 17 so as to be able to move up and down.
A packet 19 is rotatably attached to the tip of the mast 1.
7 and the boom 18, a boom cylinder 20, a boom 1
A packet cylinder 21 is interposed between each of the packets 19 and 19. The mast 17 is detachably attached to a mounting base 22 provided at the center of the tractor body 1, and the front end of a place 23 extending forward from the mast 17 is detachably attached to a bracket 24 at the front end of the tractor body 1.

The backhoe 3 is removably attached to the tractor body 1 via a mounting mechanism 25, and the backhoe 3 is attached to the machine frame 2.
6, swivel frame 27, boom 28, arm 29, packet 3
0, a boom cylinder 31, an arm cylinder 32, a packet cylinder 33, a control box 34, etc.

The reversing support device 16 that supports the sheet 15 is constructed as shown in FIGS. 1 to 5. That is, in FIGS. 1 and 2, reference numeral 35 denotes a plate-shaped fixed base, which is fixed to the tractor body 1 via a hydraulic device 6 or the like. Parallel link mechanism 36
A support stand 37 is provided via. The parallel link mechanism 36 includes a pair of left and right front links 38 and a rear link 39, and one end of the front link 38 and the rear link 39 is attached to a pair of left and right side plates 40 attached to the fixed base 35 with a pivot 42.
．． 43, 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 stand 37 is at a low position, slightly spaced upward from the fixed stand 35, as shown by the solid line in FIG.
In the backward position, it is located at a high position in line with the backhoe 3 side, as shown by the imaginary line in the figure. In this backward position, the rear link 39 of the parallel link mechanism 36 comes into contact with a stopper 41 installed between a pair of left and right side plates 40 . Stopper 41
is a band plate bent into a dogleg shape, with left and right side plates 4
0 are interconnected and reinforced. Spring hooks 49, 50 and engaging rods 51, 52 are attached between the left and right pair of front links 38 and rear links 39, and the rear links 39
A release rod 53a is attached near the pivot 45 between them. A helical spring 53.54 is fitted around the pivot shaft 42. These springs 53 and 54 urge the parallel link mechanism 36 to stand up. On the other hand, a positioning mechanism 57 is provided between the front link 38 and the support base 37, as shown in FIG. 3, for positioning the parallel link mechanism 36 in an upright state. This positioning mechanism 5
7 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 engage and disengage from the engagement recess 58.

Reference numeral 60 denotes a swivel base, and as shown in FIGS. 1 to 3, a vertical shaft 61 is fixed to the center thereof, and this vertical shaft 61 can only be rotated by a bearing boss 62 fixed to the center of the support base 37. freely supported. Therefore, the swivel table 60 is freely rotatable about the vertical axis 61 with respect to the support table 37. A sliding plate 64 that can be slid and fixed forward and backward along a pair of left and right guide rails 63 is provided on the swivel base 60, and a pivot 65 is mounted on this sliding plate 64.
The seat 15 is attached via cushion rubber 66. The support base 37 and the swivel base 60 are provided with a positioning mechanism 67 for positioning the swivel base 60 at a position rotated by 180 degrees around the vertical axis 61, and a lock bin 68 for locking. That is, as shown in FIG.
A pawl 72 is housed in a holding cylinder 71 of the support base 37 so as to be engaged with and disengaged from one of the engaging holes 69 and 70, and the ball 72 is urged upward. There is a spring 73.

The lock pin 68 is vertically slidably provided on the support base 37 via a guide tube 76 so as to be engaged with and disengaged from one of two engagement holes 74 and 75 formed at point-symmetrical positions. The lock pin 68 has a retaining pin 77 at its lower end, and the retaining pin 77 is slidably inserted into the long hole 79 of the release lever 78. The release lever 78 has a front end pivoted to the pivot shaft 44 so as to be able to swing up and down, and a rear end extending rearward passing below the release rod 53a.When the parallel link mechanism 39 is raised, the release lever 78 When the locking pin 68 is engaged and rotated downward, the lock pin 68 is pulled down and the lock of the swivel base 60 to the support base 37 is released.

Note that the release lever 78 is urged upward by a helical spring 80 wound around the pivot shaft 44.

An engaging tool 83 is rotatably attached to the rear end of the swivel base 60 by a pivot 82, and this retaining tool 83 has a height below the solid line in FIG. In the facing position, they are removably engaged with the engaging rods 51 and 52 of the parallel link mechanism 36 so as to allow the respective seats 15 to move up and down below the height of the imaginary line. 84 is a release handle for operating the engagement tool 83;
It is located at the center of the front end of the swivel base 60, and the release handle 84 is operatively connected to the engagement tool 83 via an interlocking rod 85 and a pin 86. - The 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 the rear end of the interlocking rod 85 urges the engagement tool 83 in the engagement direction. A spring 89 is fitted.

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 attached to the lower end of this spring 90.
is fitted. On the other hand, the spring cover 9 is attached to the fixed base 35.
A spring receiving portion 93 is provided such that the spring receiving portion 2 is in contact with the spring receiving portion 93 .

(Effects of the Invention) According to the present invention, a support base 37 is provided via a parallel link mechanism 36 that can be reversed and swung in the longitudinal direction of the vehicle body 1, and a swivel base &0 for supporting the sea) 15 is provided on this support base 37. Vertical axis G1・
The swivel base 6 is installed with a lock bin 68 so that it can be rotated freely.
0 is locked in the rotational position, one seat 15 can be used by reversing it back and forth. Further, the lock bin is released by a release lever 78 when the parallel link mechanism 36 is raised, and when the swivel base 60 is turned,
Since it is in a lifted state by the parallel link mechanism 36, it can be turned without interfering with other members. Furthermore, the release lever 7 is pivotally attached to the support base 37 so as to be able to swing up and down, and the lock bin 68 is operated by the rocking movement of the release lever 7.
8 moves smoothly, and the support structure for the release lever 78 can be simplified, so there is no deformation of the release lever 78 (durability is improved).

[Brief explanation of drawings]

The drawings illustrate one embodiment of the present invention, and show the first embodiment of the present invention.
The figure is a cross-sectional side view of the main part, Figure 2 is a bottom view of the same, Figure 3 is a cross-sectional side view when standing up, Figure 4 is a cross-sectional rear view, and Figure 5 is a cross-sectional side view of the same.
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 stand, 36... Parallel link mechanism, 37... Support stand, 60
... Swivel base, 61 ... Vertical shaft, 68 ... Lock bin, 78 ... Release lever, 83 ... Engagement tool, 84 ...
・Examination handle, 90...Spring for suspension.

Claims (1)

[Claims] (1) A support base (37) is provided on the vehicle body (1) via a parallel link mechanism (36) that can swing freely in the front and rear directions, and a swivel base that supports the seat (15) is provided on the support base (37). (60
) is provided so as to be able to freely rotate around the vertical axis (61), and the swivel base (60
) is provided in the support base (37) with a lock pin (68) that locks it in a rotational position around the vertical axis (61), and the parallel link mechanism (
When the parallel link mechanism (36) is raised, a release lever (78) that detaches the lock pin (68) from the swivel base (60) is attached to the support base (37) so that it can swing vertically. A vehicular seat inversion support device characterized by being pivotally connected to.