JPS6245953Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat positioning and locking device for a mobile agricultural machine.

Recently, various improvements have been made to the seats of agricultural tractors and other mobile agricultural machinery from an ergonomic standpoint to make them easier to operate and less tiring.One of these improvements is changing the seat mounting position to match the operator's body. A seat positioning device is provided that is configured to allow the user to position the seat.

However, this type of conventional positioning device has a structure in which multiple holes are drilled in the support that supports the seat, the shaft is inserted through the holes, and cotter pins or snap pins are inserted at both ends of the shaft to prevent it from falling out. Therefore, when changing the position of the seat, remove the split pin or snap pin inserted into the shaft, pull out the shaft, move the seat back and forth, align the holes in the shaft, and reinsert the shaft. It is necessary to insert a cotter pin or the like, which is very troublesome and takes a lot of time, and the movement can only be adjusted in stages.

The present invention solves the above-mentioned drawbacks at once with a simple structure, and consists of fixing a channel-shaped seat support body to the fuselage, which has rising pieces on both the left and right sides, each with a horizontal guide hole. A shaft supporting a sheet is supported between the two guide slots so as to be slidable and rotatable along the edge of the guide slot, and a cam body is integrally provided on the shaft, An operating lever is fixed to one end of the shaft, and rotation of the operating lever causes the cam body to press against or separate from the bottom surface of the seat support, thereby locking or unlocking the seat. The seat position can be easily and steplessly adjusted to the optimal position to suit the operator's body by simply rotating the control lever without having to attach or detach pins or shafts or align holes one by one. An object of the present invention is to provide a seat positioning lock device for a mobile agricultural machine, which allows an operator to quickly carry out adjustment work while remaining seated.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, FIG. 1 is a side view of an agricultural tractor 1, in which 2 is a hydraulic case, and 3 is a seat mounted above the hydraulic case 2. be. Reference numeral 4 denotes a channel-shaped seat support body having rising pieces 4a and 4b on both the left and right sides, and this seat support body 4 is integrally fixed on the hydraulic case 2 by a method such as welding. The pieces 4a, 4b are provided horizontally with elongated guide holes 5, 5' which are long in the front-rear direction.

A shaft 6 is inserted between the guide holes 5 and 5', and the seat 3 is supported by the shaft 6 via a leg seat 3a. The shaft 6 is slidable and rotatable along the edges of the guide slots 5 and 5', and a pin 7 for preventing the seat support 4 from slipping out is attached to the shaft 6 via a collar 8. It is inserted. Reference numeral 9 denotes an operating lever fixed to one protruding end of the shaft 6, and 10 is a handle thereof.

Reference numeral 11 denotes a cam body made of an elastic material such as rubber or synthetic resin, and this cam body is provided integrally with the shaft 6, and when the operating lever 9 is tilted to the horizontal position, the inside of the seat support body 4 is rotated. Bottom surface 4c
When it is brought into pressure contact with the inner bottom surface 4c and raised to a vertical position, it separates from the inner bottom surface 4c.

The illustrated example shows a configuration in which the shaft 6 is eccentrically inserted and fixed into a cylindrical cam body 11, but the shape, number, etc. of the cam body are not limited to the illustrated example. Alternatively, the cam body may be made of metal and an elastic plate made of rubber or synthetic resin may be attached to the inner bottom surface 4a of the seat support 4.

Numeral 12 is a cushion rubber fixed to the rear back surface of the seat 3, and a synthetic resin plate 13 is fixed to the lower end of the cushion rubber to facilitate sliding.

In the figure, 14 is a hydraulic lift arm.

In the configuration as described above, if the operating lever 9 is now rotated from the horizontal position shown by the solid line in FIG. 2 to the vertical position shown by the phantom line, the shaft 6 and the cam body 11 will also rotate together. At this time, cam body 1
1 is eccentrically fixed to the shaft 6, so that it is rotationally displaced in a direction away from the inner bottom surface 4c of the seat support 4. Therefore, the shaft 6 and the sheet 3 supported by the sheet support 4 via the shaft 6 can be moved to any desired position within the range of the elongated guide holes 5, 5'.

Furthermore, when attempting to fix the seat, the cam body 11 is pressed against the inner bottom surface of the seat support 4 by rotating the operating lever 9 from the upright position to the horizontal position in the opposite manner to the above. 3 is securely fixed to the support 4 in a locked state.

Therefore, according to the present invention, when changing the seat position as necessary, there is no need to attach or detach the pin 7 or the shaft 6 each time, and it is possible to simply operate the pin 7 or the shaft 6 without using any tools. Lever 9
By simply rotating the seat 3, the seat 3 can be manually slid to an optimal position and locked at that position.

Moreover, the adjustment work of the seat 3 can be carried out extremely easily and quickly by the operator rotating the operating lever 9 with one hand while sitting in a seated position, and sliding the seat 3 in the front and rear directions with the other hand. Since the seat position can be adjusted steplessly within the range of the guide slots 5 and 5', the optimum seat position can be secured according to the operator's body, etc.
This allows the operator to work comfortably in the most maneuverable position without being forced into an unreasonable posture, thereby minimizing fatigue.

As described above, the present invention has a channel-shaped seat support having rising pieces on both left and right sides with guide slots provided horizontally, and a shaft supporting the seat between the two guide slots. is slidably and rotatably supported along the edge of the guide elongated hole, a cam body is integrally provided on the shaft, and an operating lever is fixed to one end of the shaft. The structure is configured so that the cam body is pressed into contact with or separated from the bottom surface of the seat support body by the rotation operation of the seat support body to lock or unlock the seat, so there is no need to attach or detach split pins or shafts one by one or to align holes. The seat position can be easily positioned and securely fixed in the optimum position that is easiest to operate according to the operator's body, etc., by simply rotating the control lever without using any tools or the like. At the same time, the seat position can be adjusted steplessly within the range of the guide slot, and the adjustment work can be done quickly while the operator is seated without being forced into an unreasonable position. In addition, it has the effect of simplifying the structure and making it easy to assemble, thereby reducing costs.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is an overall side view of an agricultural tractor equipped with the present invention, Fig. 2 is an explanatory view of the operation of the main parts, Fig. 3 is a front view of the main parts, and Fig. 4 is an exploded perspective view of the main parts. In the figure, 3 is the seat, 4 is the seat support, 4a, 4
b is a rising piece, 5 and 5' are guide elongated holes, 6 is a shaft, 9 is an operating lever, and 11 is a cam body.

Claims (1)

[Scope of utility model registration request] A channel-shaped seat support body having rising pieces on both left and right sides with guide slots provided horizontally is fixed to the fuselage, and a shaft supporting the seat is placed between the two guide slots on the edge of the guide slot. A cam body is integrally provided on the shaft, and an operating lever is fixed to one end of the shaft, and the cam body is rotated by rotating the operating lever. 1. A seat positioning and locking device for a mobile agricultural machine, characterized in that it is configured to lock or unlock the seat by pressing against or separating from the bottom surface of a seat support.