JPH0584256B2 - - Google Patents

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 front and back 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 approximately flat, at least the bottom of the seat cushion is positioned above the seat slide rail, which helps to move the center of gravity of the seated person downwards for a more stable feeling. There is a limit.

In addition, since the bottom plate of the seat cushion is also approximately flat, if the seated person moves to either the left or right side due to some force, the seated person will be seated above the seat slide rails located at both the left and right ends of the seat. The center may shift, and vibrations of the aircraft via the seat slide rails 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, and is designed so that the plate surface at the center is located lower than the plate surfaces at both ends of the sheet in the left-right direction. A seat cushion having a bottom plate formed in a shape of The seat cushion is disposed so as to be located above the plate surface of the central portion of the seat cushion, and a recess extending in the front-rear direction of the seat is formed at both ends of the bottom plate of the seat cushion, and the recess and the The present invention is characterized in that a hinge bracket for opening and closing the seat, which is rotatable in the front and rear directions of the seat, is arranged between the seat slide mechanism and the upper surface of the seat slide rail.

(Function) Since the center portion 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 rail of the seat slide rail, making it possible to lower the center of gravity of the seat. Also,
Since the center portion of the seat bottom plate is depressed downward, when a seated person moves in the left-right direction of the seat, both left and right end portions of the seat bottom plate obstruct movement of the seating center. Furthermore, a recess extending in the front-back direction of the seat is formed at both ends of the bottom plate of the seat cushion, and a seat opening/closing hinge that can rotate in the front-rear direction of the seat is provided between the recess and the upper surface of the seat slide rail of the seat slide mechanism. Since the bracket is provided, it is possible to prevent dust and rainwater from outside from entering the recess and corroding the seat slide rail and the hinge bracket.

(Example) Fig. 2 shows an agricultural working machine to which this invention is applied. Behind the machine body 3 supported between front wheels 1 and rear wheels 2, left and right rear wheels (one is not shown) omission)
A fender 4 is attached to cover each of the two. A seat 5 is disposed between both fenders 4.

As shown in FIG. 3, this seat 5 consists of a seat cushion 5A and a seat bag 5B, and below the seat cushion part 5A is a pair of hinge brackets 6 formed in the shape of a channel extending in the longitudinal direction of the aircraft body 3. is installed. The front part of this double hinge bracket 6 is slightly slanted forward from the middle and is narrower than the rear part, and the front end is connected to a hinge 9 attached to the front end of the seat slide rail 7 by a pin (not shown). connected via. Further, the seat slide rail 7 constituting the seat slide mechanism engages with a fixed rail 8, and slides on the fixed rail 8 in the seat longitudinal direction along the rail extending direction.

As shown in Fig. 1, the seat cushion 5A
For example, the seat cover 10 is made of nylon,
It is generally composed of a cushion 11 made of polyurethane, for example, 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. Moreover, the both ends 1
Recesses 12d and 12e extending in the front-rear direction of the seat 5 are formed in the recesses 2b and 12c, and the horizontal portion 13A of the substantially L-shaped seat pipe frame 13 is attached to both recesses 12d and 12e. Note that the horizontal portion 13A of the seat pipe frame 13 connects to the concave portions 12d, 12 of the bottom plate 12 via the connecting pin 13a.
The vertical portion 13B of the seat pipe frame 13 is arranged and fixed within the seat bag 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,
As the central portion 12a of the bottom plate 12 caves in,
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 portion 12a, and as a result, an extra thickness H of the cushion 11 can be secured. The seated person can maintain a stable sitting posture, and the center of gravity J can also be lowered.

In addition, due to the depression of the central portion 12a, the seated person
The seated person will continue to remain seated in the range P indicated by the two-dot chain line in the figure, and if the seated person receives a force that moves the center of gravity J to either the left or right, for example, when the work equipment makes a sharp turn, Even in this case, the upwardly protruding end portions 12b and 12c act as walls, preventing their movement.

(Effects of the Invention) As described above, according to the present invention, there is provided a seat cushion having a bottom plate formed such that the plate surface of the center portion is located below the plate surfaces of both end portions in the left-right direction of the seat; A seat slide mechanism having seat slide rails provided on both sides of the cushion in the left-right direction of the seat and extending in the front-rear direction of the seat is arranged so that at least the upper surface of the seat slide rail is above the plate surface of the central portion of the seat cushion bottom plate. A concave portion extending in the seat longitudinal direction is formed at both ends of the bottom plate of the seat cushion, and a concave portion extending in the seat longitudinal direction of the seat sliding mechanism is disposed between the concave portion and the upper surface of the seat slide rail of the seat sliding mechanism. Since the seat is characterized by a hinge bracket for opening and closing the seat that can be rotated in the direction, the thickness of the cushion can be ensured by the amount that the central part of the bottom plate is depressed, and the seated person can maintain a stable sitting posture. In addition, the center of gravity is lowered, and the recessed part prevents dust and rainwater from entering from the outside, improving the durability of the seat rail and hinge bracket. Even if a hinge bracket for opening and closing the seat in the longitudinal direction is provided, the entire seat can be placed at a low position by making the upper surface of the rail higher than the central plate surface of the seat bottom surface.

In addition, due to the depression of the center part, the seated person will always maintain a stable sitting posture in the center part, and even when the seated person's center of gravity moves to either the left or right, the center part will bulge upward compared to the center part. Its movement is hindered by the lateral support action of both 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 affect the seated person. It will never be reached.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a side view of the tractor with the seat shown in FIG. 1 attached, and FIG. 3 is an exploded perspective view of the seat. 5... Seat, 5A... Seat cushion, 7
...Seat slide rail, 7a...Top surface of rail, 8...Fixed rail, 12...Bottom plate, 12a...
...Central portion, 12b, 12c...Both ends.

Claims (1)

[Claims] 1. A seat cushion having a bottom plate formed such that the plate surface in the center is located below the plate surfaces at both ends of the seat in the left-right direction, and a seat cushion provided on both sides of the seat in the left-right direction of the seat, A seat slide mechanism having a seat slide rail extending in the direction of A recess extending in the front-rear direction of the seat is formed at both ends of the bottom plate, and a hinge bracket for opening and closing the seat that is rotatable in the front-rear direction of the seat is arranged between the recess and the upper surface of the seat slide rail of the seat slide mechanism. A work machine seat structure characterized by: