JPH0629932Y2 - Pedal device for work vehicle with boom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pedal device for a work vehicle with a boom.

(Prior art) As a work vehicle used for harvesting fruits at high places in an orchard, the base of a boom equipped with a riding bucket for worker riding at the tip is rotatably supported on the vehicle body, Japanese Patent Application No. 63-1478 (No. 1-106497) has proposed that the bucket is moved up and down and turned by rotating the boom in the vertical and horizontal directions.

The rotation operation of the boom is performed by a pedal provided on the floor of the boarding bucket. As shown in FIG. 5, the pedal has a pedal shaft 43 provided upwardly from an opening 42 formed in the floor 41, It consists of a tread 44 provided on the upper end of the pedal shaft 43,
The lower part of the pedal shaft 43 is supported swingably in the front-rear direction and the left-right direction. Then, the boom is rotated in the up-down direction and the left-right direction by swinging the pedal shaft 43 in the front-rear direction and the left-right direction by the stepping operation of the step board 44.

(Problems to be solved by the invention) In the above-mentioned conventional one, the picked fruits are put in a box or the like provided outside the boarding bucket, but depending on the operator, the picked fruits may be stored in the boarding bucket. Someone puts it on the floor 41 and stacks it. Also, when the box for storing the fruits is full and some fruits are left unpicked, the leftover picked fruits are picked up and the floor 41 is used as described above.
May be placed on top. On the other hand, a space is required between the tread 44 and the floor 41 to allow the stepping motion of the tread 44. In addition to this, from the ergonomic point of view, the height of the tread 44 from the upper surface of the floor 41 that is easy to step on is required. Sometimes set to
There is a gap between the 44 and the floor 41 to the extent that fruits such as apples and tangerines enter, and when the fruit A placed on the floor 41 enters the gap, the tread 44 will cause the tread 44 to fall when the treadle 44 is operated. A
There is a risk that the operation of stepping on the tread 44 may be hindered by interfering with.

Then, this invention aims at solving the said problem by interposing an elastic body between a tread and a floor.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above-mentioned object is to mount a loading bucket 13 on the tip of a boom 9 whose base is rotatably supported on the vehicle body 2. An operation pedal shaft 19 provided swingably supported on the floor 16 of the boarding bucket 13 is provided in an upwardly projecting manner, and the pedal shaft 19 is oscillated by stepping on a tread 20 provided at the upper end of the pedal shaft 19. Boom 9 by movement
Is a work vehicle that is rotated, and prevents an obstacle from entering between one of the tread 20 and the floor 16 and is elastically deformed by being pressed to the other when the tread 20 is operated. The point is that the elastic body 30 is provided.

(Function) The elastic body 30 is located between the tread 20 and the floor 16 and
This prevents obstacles from entering between the floor 16 and the floor 16. Further, when the tread plate 20 is stepped on, the pedal shaft 19 swings so that the tread plate 20 on the tread side and the floor 16 come close to each other, but the elastic body 30 is elastically deformed in a compressive manner between the two to step on the tread plate 20. And the elastic force of the elastic body 30 becomes a resistance to give a proper stepping sensation. Further, the elastic restoring force of the elastic body 30 helps the tread 20 to return from the stepped position to the original neutral position.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, reference numeral 1 is a work vehicle with a boom used for harvesting fruits at high places in an orchard, and a vehicle body 2 is mainly composed of a frame to which pipe materials are connected. Left and right front wheels 3L, 3R and left and right rear wheels 4L, 4R are attached to the front and rear of the vehicle body 2, and the left and right front wheels 3L, 3R are driven by an engine 5 mounted on the rear portion of the vehicle body 2 via a transmission mechanism 6.

A swing shaft 7 is rotatably attached to the rear of the vehicle body 2 about the vertical axis, and a boom support bracket 8 is attached to the upper end of the swing shaft 7, and the base of the boom 9 is attached to the support bracket 8 about the pivot 10. It is rotatably attached. A boarding bucket 13 is attached to the tip of the boom 9.
The cylinder cylinder end of the lifting cylinder 11 is pivotally attached to the lower end of the swivel shaft 7, the rod end of the cylinder 11 is pivotally attached to the boom 9, and the boom 9 is pivoted in the vertical direction when the cylinder 11 expands and contracts. The bucket 13 is moved up and down. Further, the rod end of the turning cylinder 12 is pivotally attached to the boom support bracket 8, the cylinder end of the cylinder 12 is pivotally attached to the vehicle body 2, and the boom 9 is extended in the left-right direction around the turning shaft 7 by the extension and contraction of the cylinder 12. The boarding bucket 13 is turned by turning.

The boarding bucket 13 is always kept in substantially the same posture by an auxiliary boom 14 which forms a parallel link with the boom 9. In addition, the boarding bucket 13 has a left / right running lever.
15L and 15R are attached, and the left front wheel is caused by swinging the left lever 15L back and forth.
3L rotates in the forward / reverse direction, and the right front wheel 3R rotates in the forward / reverse direction due to the forward / backward swing of the right lever 15R, and the forward / backward movement and the left / right steering are performed.

A pedal 17 for raising and lowering and turning is arranged on one side of a floor 16 of the boarding bucket 13. As shown in FIG. 1 and FIG. 2, the pedal 17 includes a pedal shaft 19 provided so as to project upward from an opening 18 formed in the floor 16, and a tread plate 20 provided at an upper end of the pedal shaft 19.
It consists of and. The tread plate 20 is made of a plate material, is formed in a rectangular shape in plan view, and the pedal shaft 19 is located at the center thereof. The U-shaped metal fitting 21 is fixed to the lower end of the pedal shaft 19, and the U-shaped metal fitting 21
Is pivotally supported by a pivot shaft 22 provided on the lower surface of the floor 16 and rotatable about a horizontal axis center through a pin 23 extending in the front-rear direction. An arm 24 attached to the rotating shaft 22 is pivotally connected to a rod 25 connected to a push-pull wire (not shown) for operating a control valve that controls the lifting cylinder 11,
By the forward and backward swinging of the pedal shaft 19 by the stepping operation of the tread plate 20 in the forward and backward directions shown by the phantom line in the figure, the rotary shaft 22 is rotated and the rod 25 is pushed and pulled, and the lifting cylinder 11 is expanded and contracted. It Further, a pair of rods attached to the U-shaped metal fitting 21.
One end of an L-shaped relay arm 27 is interposed between the two, and the other end of the relay arm 27 is rotatably supported about the vertical axis and used for operating a control valve that controls the swiveling cylinder 12. It is connected to a push-pull wire (not shown) via a connecting rod 28 and a swing arm 29. Then, the pedal shaft 19 by the stepping operation of the tread plate 20 in the left-right direction shown by the phantom line in FIG.
By the left-right swinging of the relay arm 27, the other end of the relay arm 27 is rotated, the swinging arm 29 swings back and forth, the rod 28 is pushed and pulled, and the swing cylinder 12 is extended and retracted. The tread 20
Is returned from the stepped position to the neutral position by the push-pull wire.

An elastic body 30 is fixed to the lower surface of the tread plate 20. The elastic body 30 is provided around the pedal shaft 19 at a distance and has a rectangular tubular shape, and has a slight gap 31 between the elastic body 30 and the floor 16. Further, the outer peripheral surface 30a of the elastic body 30 is the edge 20a of the tread 20.
The fruit (obstacle) picked and placed on the floor 16 is prevented from entering between the tread 20 and the floor 16. Further, the elastic body 30 is made of an easily elastically deformable material such as sponge rubber, and as shown by the phantom lines in FIGS. 1 and 2, it is pressed against the upper surface of the floor 16 when the tread 20 is stepped on and elastically compressed. While deforming and allowing the stepping motion of the tread 20,
The elastic force acts as a resistance, giving a proper feeling of stepping,
Moreover, the elastic restoring force assists the pedal 17 to return from the depressed position to the neutral position.

The elastic body 30 may be provided on the floor 16 side.

(Effect of the Invention) According to the present invention, the elastic body provided on one of the tread 20 and the floor 16
Obstacles are prevented from entering between the tread 20 and the floor 16 by means of 30, so that the stepping operation of the tread 20 is not hindered. Further, the elastic body 30 is elastically deformed in a compression state between the tread plate 20 and the floor 16 when the tread plate 20 is stepped on, and thus the tread plate 20.
While allowing the stepping action of 20, the elastic force of the elastic body 30 serves as resistance to give an appropriate stepping sensation. Further, the elastic restoring force of the elastic body 30 can help the tread 20 to return from the stepped position to the original neutral position.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a rear sectional view of an essential part, FIG. 2 is a side sectional view of the essential part, FIG. 3 is an overall plan view, and FIG. An overall side view and FIG. 5 are schematic views showing a conventional example. 2 ... Body, 9 ... Boom, 13 ... Boarding bucket, 16 ...
… Floor, 19… Pedal shaft, 20… Tread, 30… Elastic body.

Claims (1)

[Scope of utility model registration request] 1. A boarding bucket (13) is provided at the tip of a boom (9) whose base is rotatably supported on a vehicle body (2) and swings on a floor (16) of the boarding bucket (13). A freely supported operation pedal shaft (19) is provided in an upwardly protruding shape.
Pedal shaft by stepping on the tread (20) provided at the upper end of (9)
A work vehicle in which a boom (9) is pivotally operated by swinging (19), and an obstacle is prevented from entering between one of the tread (20) and the floor (16). A pedal device for a boom-equipped work vehicle, further comprising an elastic body (30) that is elastically deformed by being pressed by the other side when the step board (20) is stepped on.