JPH036010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a seat device that allows direction changes, and is used for example in industrial vehicles such as forklift trucks.

``Prior Art'' Industrial vehicles such as forklift trucks frequently change their direction of travel at cargo handling locations to perform cargo handling operations such as reloading cargo.

The seats of conventional industrial vehicles are most commonly fixed to the vehicle body so that they cannot change direction. In such vehicles, when the vehicle changes direction and the driver turns to the rear or side, the driver must leave the seat in place and twist the body into an awkward position. In this case, the seat is set to rotate around a fixed center of rotation, such as the center of gravity.

``Problems to be solved by the invention'' However, with such conventional technology, when the seat is rotated, the operator's legs swing considerably, which causes the operator's feet to move away from the brake and clutch pedals, making it more difficult to control the vehicle. However, there was a problem that it was difficult to use.

The present invention has been made by focusing on these conventional problems, and provides a seat device that can change direction without worsening the steering posture and can make the direction change operation smooth. is intended to provide.

"Means for Solving the Problems" The gist of the present invention for achieving the above object is as follows: (1) A vehicle body side rail fixed to the vehicle body and a seat side rail slidably fitted thereto. Two rows of slide rails are arranged corresponding to the left and right sides of the seat, and an extendable connecting bar is installed between the front ends of the seat side rails of the two rows of slide rails, and both ends of the connecting bar are Each of the slide rails is rotatably connected to the seat side rail of the corresponding slide rail about a substantially vertical axis, and at least one end is movably connected to the front end of the seat side rail of the corresponding one of the slide rails, A seat device comprising a front end portion fixed to a movably connected side of the connecting bar, and a rear end portion of the seat supported so as to be slidable laterally.

(2) Two rows of slide rails consisting of a vehicle body side rail fixed to the vehicle body and a seat side rail slidably fitted to the vehicle body side rail are arranged corresponding to the left and right sides of the seats, and the two rows of slide rails are arranged to correspond to the left and right sides of the seats. An extendable connecting bar is installed between the front ends of the seat side rails of the corresponding one of the slide rails, and one end of the connecting bar is rotatable around a substantially vertical axis at the front end of the seat side rail of the corresponding slide rail. It is movably connected to the front end and connected to the other slide rail at the other end via a lock plate base, and the lock plate base is slidable on the upper surface of the front end of the seat side rail of the other slide rail. The lock plate base is placed on the seat and is installed so as to be rotatable around a substantially vertical axis and to be movable back and forth through a pin and a long hole extending in the longitudinal direction of the seat, and a locking plate base is provided with a locking and disengaging portion at its free end. When the pin is at one end of the elongated hole, it is outside the trajectory of the engagement section of the lock plate base on the seat side rail of the other slide rail, and when it is at the other end, it is located within the trajectory. a latch plate having a locking part that fixes the front end of the seat to the side of the connecting bar that moves together with the front end of the corresponding seat side rail, while the rear end of the seat slides laterally; The present invention resides in a seat device that can be supported.

``Operation'' When the seat-side rail of one slide rail is moved forward, the seat rotates along with this seat-side rail, shifting laterally around the front end of the other slide rail as the seat-side rail moves forward. ,
The mechanical center of rotation is located far away, allowing the seat to change direction without causing the occupant's legs to swing excessively.

Also, if the seated person stops pushing his or her legs out to change the direction of the seat and moves the seat forward,
The lock plate base moves relative to the seat-side rail of the other slide rail so that the pin, which is the center of rotation of the seat, is located at the rear end of the slot, and the locking part of the latch plate is positioned at the free end of the lock plate base. It is out of the trajectory of the engagement/disengagement part.

If you change the direction of the seat as described above, the engaging/disengaging part of the lock plate base will be in a position corresponding to the engaging part of the latch plate, and if you stop the direction change movement of the seat and stretch your legs for maneuvering etc. As the seat moves back slightly, the pin moves to the front end of the elongated hole, and the locking portion of the lock plate base locks with the locking portion of the latch plate, thereby locking the seat in that position.

Similarly, when returning the seat to its original direction, the seat can be restrained in that position or released by simply moving the seat back and forth, and if used in a pilot's seat, it can change direction naturally.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 5, seats 20 are mounted on the body 11 of a forklift truck 10, which is an industrial vehicle.
is installed, and the seat device 30 according to this embodiment
is for supporting this seat 20.

As can be seen in Fig. 1, two rows of slide rails 40a and 40b are arranged corresponding to the left and right sides of the seat 20, and both slide rails are connected to the vehicle body 1.
The main parts are a vehicle body side rail 41 fixed to the vehicle body side rail 41 and a seat side rail 42 slidably fitted thereto.

One slide rail 40a is not provided with a longitudinal movement restraint mechanism, but the other slide rail 40a is not provided with a longitudinal movement restraint mechanism.
0b, and its operating lever 43 is attached to the slide rail 40b.

Seat side rail 4 of one slide rail 40a
A connecting bracket 44 rotatable around a substantially vertical axis via a vertical pin 42a is installed at the front end of the other slide rail 40b, and a lock plate base 45 is installed at the front end of the other slide rail 40b.
a and an elongated hole 45a that is long in the front-rear direction.

A disengaging portion 45b including a notch is formed at the free end of the lock plate base 45.
A guide surface 45d is formed at the distal end 45c of the lock plate base 45, and a stopper 45e that comes into contact with the side surface of the seat-side rail 42 of the slide rail 40b is fixedly provided.

A latch plate 46 corresponding to the lock plate base 45 is fixed to the seat side rail 42 of the slide rail 40b, and the latch plate 46 has a piece-shaped locking part 46a facing the locking part 45b of the lock plate base 45. ing.

The locking/disengaging portion 45b of the lock plate base 45 and the locking portion 46a of the latch plate 46 are connected to the elongated hole 45a of the lock plate base 45 and the vertical pin 42a.
In accordance with the displacement amount s1 in which
It is set to be relatively displaced by 2.

Connection bracket 44 and lock plate base 4
A connecting bar 50 is installed between the connecting bar 5 and the connecting bar 50.

The connecting bar 50 is configured to be expandable and retractable by an outer cylinder 51 and an inner rod 52. An end 51a of the outer cylinder 51 forming one end of the connecting bar 50 is connected to the connecting bracket 44, and the inner rod 52 is connected to the connecting bracket 44. The end portion is connected to a lock plate base 45.

As shown in FIG. 4, the end 51a of the outer cylinder 51
is a screw shaft 44a fixed to the connection bracket 44.
The end 51a of the outer cylinder 51 is connected to the seat-side rail 4 of the slide rail 40a, and the end 51a of the outer cylinder 51 is connected to the seat-side rail 4 of the slide rail 40a.
It is connected to the front end of No. 2 so as to be rotatable around a substantially vertical axis and movable together with the front end.
The end of the insert rod 52 is similarly connected to the lock plate base 45.

The front end 22 of the frame 21 of the seat 20 is fixed to an outer cylinder 51 on which the connecting bar 50 is movably connected together with the front end of the seat-side rail 42 of one slide rail 40a, as shown in FIG. As can be seen, a shoe member 24 is installed on the rear end portion 23 of the frame 21 of the seat 20.

The show member 24 has slide rails 40a, 40
The stopper legs 24a,
24b is fixedly installed, and the stopper leg 24a is provided with a guide slope 24c.

Next, the action will be explained.

First, to explain the operation schematically, as shown by the solid line in FIG. 7, when only the seat side rail 42 of one slide rail 40a on the left side in the figure is advanced from a state where the seat 20 faces forward, the connection is made. The bracket 44 moves together with the front end of the seat side rail 42 and rotates about the vertical pin 42a.

As the connection bracket 44 moves and rotates, the end of the outer cylinder 51 of the connection bar 50 also moves together with the connection bracket 44, and the connection bar 50 extends as the outer cylinder 5 and the inner rod 52 slide. At the same time, it rotates approximately around the vertical pin 42a of the other slide rail 40b, resulting in the state shown by the imaginary line in FIG.

Since the front end of the seat 20 is fixed to the outer cylinder 51 of the connecting bar 50, it rotates integrally with the outer cylinder 51 and changes direction. At this time, the show member 24 is attached to the slide rails 40a and 4 at the rear of the seat 20.
It slides laterally on the seat side rails 42, 42 of 0b and is driven.

As a result, the seat 20 changes direction without leaving the operating range C of the pedals A and B in front of it, as shown by the dashed line in FIG. The difference becomes clear when compared with the conventional direction change position shown by the two-dot chain line.

To explain the operation in more detail, with the seat 20 facing forward as shown in FIGS. 1 and 3, the seat 20 is moved back and forth by operating the operating lever 43 of the longitudinal movement restraint mechanism. For example, the position of the seat 20 can be adjusted while facing forward.

If no rotational force is applied while the seat 20 is restrained by the longitudinal movement restraint mechanism, the seat 20 maintains its posture. Since the seated person usually stretches his or her legs out, the vertical pin 42a is located at the front end of the elongated hole 45a in the slide rail 40b.

When the seated person twists his or her body to rotate the seat 20 clockwise in FIG. 3, the seat 20 begins to rotate due to this action. That is, the seat-side rail 42 of one slide rail 40a begins to move forward.

The seated person stops pushing his or her feet to change direction, and instead a force is applied to move the seat 20 forward, so the seat 20 moves slightly forward and the vertical pin 42a moves behind the long hole 45a. Move to the edge. Therefore, the locking portion 46a of the latch plate 46 is located outside the locus of movement of the locking and disengaging portion 45b of the lock plate base 45.

When the seat 20 is rotated sufficiently, the lock plate base 45 also rotates, and the lock plate base 4
The locking portion 46a of the latch plate 46 is in a position where it can be fitted into the notch of the locking/disengaging portion 45b of No.5. Since the locking portion 46a of the latch plate 46 is located outside the locus of movement of the locking portion 45b or the distal end portion 45c of the lock plate base 45, the locking portion 46a of the latch plate 46 is in a state where it can be inserted without interference.

Then, when the seat 20 is stopped and the seated person consciously or unconsciously puts his or her feet up, the seat 20 moves backward, and the locking portion 46a of the latch plate 46 engages with the notch in the locking/disengaging portion 45b of the lock plate base 45. 6 and locks the lock plate base 45, resulting in the state shown in FIG.

For convenience of operation, the locking portion 46 of the latch plate 46
When the seat 20 changes direction while the seat 20 is located within the movement locus of the locking/disengaging portion 45b of the lock plate base 45, the guide surface 45d of the elongated hole 45a abuts and guides the locking portion 46a of the latch plate 46.

When the seat 20 is changing direction, the locking portion 46a of the latch plate 46 fits into the notch of the tip 45c of the lock plate base 45 and locks the lock plate base 45, so that the seat 20 may be accidentally moved. never returns.

When restoring the seat 20, stop pushing your feet and move the seat 20 forward a little, so that the locking part 46a of the latch plate 46 comes out of the notch of the locking part 45b of the lock plate base 45. Open the lock plate base 45. Then, when the seated person twists his or her body to rotate the seat 20 in the return direction, the seat 20 rotates naturally, and the stopper 45e fixed to the lock plate base 45 comes into contact with the side surface of the seat-side rail 42 of the slide rail 40b. The seat 20 returns to its forward facing position.

In response to the direction change operation of the seat 20, the shoe member 24 provided at the rear end of the seat 20 slides on the seat side rails 42, 42 of the slide rails 40a, 40b.

Further, the seat 20 can be tilted forward as a whole by raising the rear part so as to rotate around the screw shaft 44a which is the central axis of the connecting bar 50. After the vehicle body 11 is tilted forward, an inspection port opens and the interior can be inspected. If the seat 20 is out of position when returning to its original position, the guide slope 24c comes into contact with the seat-side rail 42 of the slide rail 40b and guides the seat 20, so that the seat 20 can be returned reliably.

In addition, in the above embodiment, the connecting bar 50 is connected to the outer cylinder 5.
1 and an interpolation rod 52 to make it expandable and contractible.
The structure is not limited to this; for example, the connecting bar 50 may be made as a single unit, and its end may be inserted through the lock plate base 45 to make the entire connecting bar 50 expandable and retractable.

In addition, although the structure in which the shoe member 24 is provided at the rear of the seat 20 and slides on the seat side rails 42, 42 of the slide rails 40a, 40b is shown,
The stopper legs 24a, 24b may slide on the upper surface of the vehicle body 11.

"Effects of the Invention" According to the seat device according to the present invention, it is possible to change the direction of the seat without forcing the seated person into an unreasonable posture, and the seat can be seated by utilizing the natural movement of the seated person when changing direction. Since the change of direction is restrained or released, the change of direction is performed extremely naturally, and the seat can be provided with an extremely excellent usability.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which FIG. 1 is a perspective view of a seat device, FIG. 2 is a perspective view of a forklift truck equipped with the seat device, and FIG. 3 is a plan view of the front part of the seat device. , FIG. 4 is a cross-sectional view taken along the line of FIG. 3, FIG. 5 is a rear view of the lower part of the seat device, FIG. 6 is a plan view of the front part of the seat device in a state where the direction has been changed, and FIGS. 7 and 8. is an operation explanatory diagram. 10... forklift truck, 11... vehicle body, 20... seat, 24... shoe member, 30...
...Seat device, 40a, 40b...Slide rail, 41...Vehicle side rail, 42...Seat side rail, 42a...Vertical pin, 44...Connection bracket, 45...Lock plate base, 45a...
Elongated hole, 45b...Latching/disengaging portion, 46...Latch plate, 46a...Locking portion, 50...Connecting bar.

Claims (1)

[Scope of Claims] 1. Two rows of slide rails consisting of a vehicle body side rail fixed to the vehicle body and a seat side rail slidably fitted thereto are arranged corresponding to the left and right sides of the seat, and 2. An extendable connecting bar is installed between the front ends of the seat side rails of the slide rails in the row, and both ends of the connecting bar are connected to the seat side rails of the corresponding slide rails so as to be rotatable around a substantially vertical axis. , at least one end of which is movably connected with the front end of the seat side rail of the corresponding one of the slide rails, fixing the front end of the seat to the movably connected side of said connecting bar, while the rear of the seat A seat device whose end portions are supported so as to be slidable laterally. 2. Two rows of slide rails consisting of a vehicle body side rail fixed to the vehicle body and a seat side rail slidably fitted to the vehicle body side rail are arranged corresponding to the left and right sides of the seats, and the seats on the two rows of slide rails are arranged correspondingly to the left and right of the seats. An extendable connecting bar is installed between the front ends of the side rails, and one end of the connecting bar is rotatable around a substantially vertical axis at the front end of the seat side rail of one of the corresponding slide rails, and the front end is rotatable around a substantially vertical axis. The other end is connected to the other slide rail via a lock plate base, and the lock plate base is slidable on the upper surface of the front end of the seat side rail of the other slide rail. At the same time, the lock plate base is placed so that it can be rotated around a substantially vertical axis and moved back and forth through a pin and a long hole that extends in the longitudinal direction of the seat. When the pin is at one end of the elongated hole, the pin is located outside the trajectory of the engagement portion of the lock plate base on the seat side rail of the slide rail, and when it is at the other end, it is located within the trajectory. A latch plate having a locking portion is fixed, and the front end of the seat is fixed to the side of the connecting bar that moves together with the front end of the corresponding seat side rail, while the rear end of the seat is slidable in the lateral direction. A seating device supported by