JPH02128936A - Seat structure of working machine - Google Patents

Abstract

PURPOSE:To maintain sufficient thickness of a seat cushion by sinking the plate face in the middle of the seat bottom plate lower than the plate faces at the two ends, and locating the oversurface of a seat slide rail situated at the two ends above the plate face in the middle. CONSTITUTION:A seat cushion 5A is composed on a seat cover 10, cushion 11, and bottom plate 12. The central part 12a of this bottom plate 12 is recessed downward, and the two ends 12b, 12c shall be situated above the plate face of this central part 12a. At the two ends 12b, 12c, recesses 12d, 12e are formed stretching in the direction fore and aft of the seat 5 and are fitted with a horizontal part 13A of a seat pipe frame 13. The oversurface 7a of a seat slide rail 7 is located above the plate face of the central part 12a. Thereby sufficient thickness H is secured for the cushion 11, and the center of gravity J of a person seated can be sunk to accomplish stabilization.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat attached to an agricultural working machine such as a tractor.

(Prior Art) Conventionally, a seat attached to a tractor is provided with a seat slide rail so as to be slid in the longitudinal force direction, while the bottom plate of the seat cushion is formed substantially flat.

(Problem to be Solved by the Invention) However, according to the configuration of the above-mentioned prior art, since the bottom plate of the seat cushion is substantially flat, at least the bottom of the seat cushion is located above the seat slide rail. There is a limit to how much the center of gravity can be moved downward to provide a more stable feeling.

In addition, since the bottom plate of the seat cushion is also approximately flat, if the seated person receives some force and moves to the left or right, the seating center will be located above the seat slide rails located at both the left and right ends of the seat. may move,
The vibrations of the aircraft body via the seat slide rail are directly transmitted to the seated occupant, causing discomfort to the seated occupant.

(Means for Solving the Problems) The present invention has been made to solve the problems of the prior art. Of the seat slide mechanisms formed to be positioned below the surface of the seat and extending in the longitudinal direction of each seat at both end portions, at least the rail upper surface of the seat slide rail is located above the plate surface of the central portion. It is characterized by being arranged so that the

(Function) Since the center of the bottom plate of the seat is depressed downward,
The bottom of the seat cushion can be positioned below the upper surface of the seat slide rail, making it possible to lower the center of gravity of the seat. In addition, since the bottom of the seat is depressed downward at its center, when a seated person moves in the left-right direction of the seat, both left and right ends of the seat bottom plate prevent the center of the seat from moving.

(Example) Fig. 2 shows an agricultural working machine to which this invention is applied. Behind the machine body 3 supported between the front wheels 1 and 2, left and right rear wheels (one is not shown) (Omitted) Fenders 4 are attached to cover the respective parts 2. A seat 5 is arranged between both fenders 4.

As shown in FIG. 3, this seat 5 consists of a seat cushion 5A and a seat back 5B, and below the seat cushion part 5A is a pair of hinge brackets 6 formed in a channel shape extending in the rearward direction of the fuselage 3. is installed. The front part of both hinge brackets 6 is slightly lowered from the middle and is narrower than the rear part, and the front end has a pin (not shown) attached to a hinge 9 attached to the front end of the seat slide rail 7. connected via. Further, the seat slide rail 7 constituting the seat slide mechanism engages with the fixed rail 8, and moves on the fixed rail 8 in the direction of the rear force internal force along the rail extending direction.

As shown in FIG. 1, the seat cushion 5A is generally composed of a seat cover lo made of, for example, nylon, a cushion 11 made of, for example, polyurethane, and a bottom plate 12. Here, the center portion 12a of the bottom plate 12 is depressed downward, and both left and right end portions 12b% and 12c are located above the plate surface of the center portion 12a. Furthermore, recesses 12d and 12e extending in the front-rear direction of the seat 5 are formed in both end portions 12b and 12c, and both recesses 12d
.

12e is the water N of the abbreviated sheet pipe frame 13.
F section 13A is attached. Note that the horizontal portion 13A of the sheet pipe frame 13 is connected to the bottom plate 12 via the connecting bin 13a.
The vertical portion 13B of the seat pipe frame 13 is arranged and fixed within the seat back 5B by appropriate means.

Note that the fixed rail 8 is fixed to a support panel 15 attached between the rear panel 14 and the rear cover.

Since this embodiment is configured as described above, the bottom plate 12
By caving in the central part 12a of the cushion, both seat slide rails 7 can be placed upward, specifically, the rail upper surface 7a of the seat slide rail 7 can be placed above the plate surface of the central part 12a, and as a result, the cushion An extra thickness H of the eyes 11 can be ensured, a stable sitting posture of the seated person can be maintained, and the center of gravity position J can be lowered.

In addition, due to the depression of the center Ffll l 2 a, the seated person will continue to maintain the sitting position in the range P indicated by the two-dot chain line in Fig. 1, and for example, when the work equipment makes a sharp turn, etc.
Even if the seated person receives a force that moves the center of gravity 11i1J to either the left or right, the upwardly protruding end portions 12b and 12c act as walls to prevent the center of gravity from moving.

(Effects of the Invention) As described above, according to the present invention, the bottom plate of the seat is formed such that the plate surface at the center thereof is located lower than the plate surfaces at both ends of the seat in the left and right direction, and Among the seat slide mechanisms extending in the longitudinal direction of each seat, at least the top surface of the seat slide rail is located above the plate surface of the central portion, so that the bottomless center The thickness of the cushion can be ensured by the amount that the portion is depressed, and the seated person can maintain a stable sitting posture, and the center of gravity can also be lowered.

4゜In addition, due to the depression of the central part, the seated person will always maintain a stable sitting posture in the central part, and even when the seated person's center of gravity moves to either the left or right, the position will be higher than the central part. Its movement is hindered by the lateral support of the raised ends.

In this case, the seat slide rails are arranged at both ends of the bottom plate, so the seated person does not move onto the seat slide rail, and therefore, the vibrations of the aircraft via the seat slide rail directly reach the seated person. It won't hurt.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
Side view of the tractor with the seat shown in the figure attached, Figure 3!
FIG. 3 is an exploded perspective view of the seat. 5... Seat, 5A... Seat cushion, 7...
・Seat slide rail, 7a...Rail top surface, 8・
...Fixed rail, 12...Bottom plate, 12a...Central part, 12b112c...Both ends.

Claims (1)

[Claims] 1. The bottom plate of the seat cushion is formed so that the plate surface at the center thereof is positioned lower than the plate surfaces at both ends of the seat in the left-right direction, and the seat slide extends in the front-rear direction of each seat at both ends. 1. A seat structure for a work machine, wherein the mechanism is arranged such that at least the upper surface of the seat slide rail is located above the plate surface of the central portion.