JPH0556589U - Suspension seat for special vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] The impact can be sufficiently mitigated and the inclination angle of the seat back can be adjusted arbitrarily, ensuring an optimal driving posture and greatly improving ride comfort performance. To provide a suspension seat for special vehicles capable of [Structure] In a suspension seat for a special vehicle in which a seat body 1 composed of a cushion frame 2 and a back frame 3 is elastically supported on a base frame body 2 via a suspension type suspension mechanism, a lower end of the back frame 3 is a cushion frame 2 The base frame 4 is rotatably connected to the rear end of the back base frame 10, and the lower connecting end of the back base frame 10 is rotated rearward of the cushion base frame 8 under the guide of the guide pin 14 and the guide groove 13. This back base frame 1 can be freely connected
By connecting 0 to the back frame 3 via a link 11, the inclination angle of the seat back can be freely adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a suspension seat for a special vehicle that is used for the operating seat of a special vehicle such as a forklift or a tractor that has large vibration.

[0002]

[Prior Art]

 Chairs used for special vehicles such as forklifts and tractors need to absorb a large shock generated when they are used, so they have a suspension mechanism with springs under the seat cushion, and shocks on the back of the seatback. Those having a suspension mechanism in which an absorber and a spring are arranged are widely used. (For example, Jitsukai Sho 63-128138)

By the way, in addition to the effect of cushioning the shock, the suspension seat for a special vehicle is also required to arbitrarily adjust the inclination angle of the backrest to ensure a comfortable driving posture. If a mechanism is installed to add a mechanism to adjust the seat back inclination angle to the back of the seat back, the inclination angle of the backrest can be adjusted as desired, but the suspension mechanism at the bottom raises the seat cushion height and the driver's seat. However, when a suspension type suspension mechanism is provided on the back of the seat back, a complicated mechanism is added to the back to add a mechanism for adjusting the seat back inclination angle. This makes it difficult to secure an optimal driving posture and the riding comfort becomes poor. there were.

[0004]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems and can sufficiently reduce the shock generated during driving, and the height of the seat cushion can be suppressed to a low level, so that the driver's seat The suspension seat for special vehicles that can minimize the space of the vehicle and also can adjust the inclination angle of the seat back arbitrarily to ensure the optimum driving posture and to greatly improve the riding comfort performance. It was completed for the purpose of offering.

[0005]

[Means for solving the problem]

 The suspension seat for a special vehicle of the present invention, which has been made to solve the above-mentioned problems, has a special structure in which a seat body in which a seat back is connected to a seat cushion is elastically supported by a suspension mechanism on a base frame. In the vehicle suspension seat, the seat back is rotatably connected to the rear end of the cushion frame of the seat cushion with the lower end of the back frame, and the base frame is a connection point between the back frame and the cushion frame. An arc-shaped guide groove having a pivot point on the extension line of the back pivot point and having the pivot point as a center of rotation is provided below the cushion base frame so that the lower connection end of the back base frame is rotatably connected at the pivot point. The guide pin provided on the back base frame is the above-mentioned plan. And that is guided by the groove, further, the the back frame and the bar Tsu Kubesu frame is characterized in that the inclination angle of the seat back and connected via a link are also available freely adjusted.

[0006]

[Example of actual rotation]

 Next, the present invention will be described in detail based on the illustrated actual rotation example. 1 is a seat body including a seat cushion in which a seat cushion 2a is attached to a cushion frame 2 and a seat back in which a seat back 3a is attached to a back frame 3, 4 is a base frame for elastically supporting the seat body 1, and 5 is A hinge 5 that rotatably connects the cushion frame 2 and the back frame 3. Reference numeral 6 denotes a lean hose horizontally installed above the back frame 3, and a shock absorber 7 is provided at the center of the lean hose 6 for elastically supporting the seat body.

The base frame 4 is composed of a cushion base frame 8 and a back base frame 10. The seat body 1 is supported by the base frame 4 via a link mechanism. That is, the cushion frame 2 is attached to the cushion base frame 8 via the link 9, while the back frame 3 is attached to the back base frame 10 on both sides of the shock absorber 7 via the links 11. It is configured to be. Further, the cushion base frame 8 and the back base frame 10 are connected by a hinge 12a to the lower connecting end of the back base frame 10 above a substantially fan-shaped connecting portion 12 formed at the rear end of the cushion base frame 8. It is rotatably connected. The hinge 12 a is constructed so that its central axis is on an extension line of the rotation axis of the hinge 5 that connects the cushion frame 2 and the back frame 3. Further, the connecting portion 12 is provided with an arc-shaped guide groove 13 having a rotation axis as a center, and a guide pin 14 which moves in the guide groove 13 is provided in a lower portion of the back base frame 10. An inclination angle adjusting mechanism 16 including a lock member 15 such as a fastening nut for fixing the guide pin 14 at an arbitrary position is provided.

A lean hose 17 is horizontally installed at a lower portion of the back frame 3, and two springs 19 are sandwiched between the lean hose 17 and a bracket 18 protruding from the back base frame 10. Is stretched, and is configured to absorb and relax the impact by the elastic force of the spring 19 interposed between the back frame 3 and the back base frame 10 regardless of the inclination angle of the back frame 3.

[0009]

[Action]

 With this structure, the shock generated during operation is sufficiently mitigated by the suspension type suspension mechanism such as the shock absorber 7 and the spring 19 on the back surface of the back frame 3. When it is desired to adjust the tilt angle of the seat back, the lock between the cushion base frame 8 and the back base frame 10 by the lock member 15 of the tilt angle adjusting mechanism 16 is released to allow the base frame 4 to rotate freely at the hinge 12a. In addition, if the seat back or the back base frame 10 is tilted forward or backward, the back base frame 10 is guided under the guide pin 14 inserted into the guide groove 13 with the hinge 12a serving as a pivot point as the center of rotation. Is smoothly rotated and the back base frame 10 is tilted with respect to the cushion base frame 8. The tilt angle is adjusted, and the cushion frame 2 connected to the back base frame 10 by the link 11 is also driven around the hinge 5 so that the tilt angle of the seat back is set to an arbitrary position. be able to.

If the seat back can be made to have a desired inclination angle in this manner, the cushion base frame 8 of the base frame 4 and the back base frame 10 are locked by the locking member 15 again. By sitting on the seat, the seat back is also held at a predetermined angle, which allows the driver to maintain the most comfortable posture, and even when driving for a long time, he / she can drive comfortably without fatigue. You can continue to work. Further, even if the seat back is tilted at any angle by the adjustment of the unique tilt angle adjusting mechanism 16 described above, the back frame 3 and the back base frame 10 are configured to rotate about the same axis. In addition to maintaining the parallel state, the spring 19 is interposed between the two so that a predetermined elastic force is constantly acting, so that stable riding comfort performance is maintained.

[0011]

[Effect of the device]

 As is apparent from the above description, the present invention can sufficiently reduce the shock generated during driving, and can also keep the height of the seat cushion low to minimize the driver's seat space. In addition, the tilt angle of the seat back can be adjusted by providing a special tilt angle adjustment mechanism that can freely adjust the tilt angle of the back frame at the connection between the cushion base frame and the back base frame of the base frame body. The corners can be adjusted arbitrarily to ensure an optimal driving posture and greatly improve the riding comfort performance, and it also has the advantage that it can be manufactured at a low cost with a simple structure. Therefore, the present invention has an extremely large practical value as a suspension seat for a special vehicle that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a rear view showing an embodiment of the present invention.

[Explanation of symbols]

 1 seat body 2 cushion frame 3 back frame 4 base frame 8 cushion base frame 10 back base frame 11 link 13 guide groove 14 guide pin

Claims (1)

[Scope of utility model registration request] 1. A suspension seat for a special vehicle in which a seat body (1) having a seat cushion followed by a seat back is elastically supported by a base frame (4) with a suspension type suspension mechanism. The lower end of 3) is rotatably connected to the rear end of the cushion frame (2) of the seat cushion, and the base frame (4) is connected to the back frame.
The cushion base frame (8) is provided with an arc-shaped guide groove (13) around the extension of the connection point between the cushion frame (2) and the cushion frame (2) as the pivot point. The lower connecting end of the base frame (10) is rotatably connected at the pivot point and the guide pin (14) provided on the back base frame (10) is connected to the guide groove (1).
Further, the back frame (3) and the back base frame (10) are connected via a link (11) so that the inclination angle of the seat back can be freely adjusted. Suspension seat for special vehicles characterized by