JPH0539950Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention mainly relates to a driver's seat device for a construction vehicle.

Prior Art FIG. 5 is a side view of a hydraulic excavator. In the figure, 1 is a driver's cab of a hydraulic excavator, 2 is a driver's seat, 3 is a work attachment attached to the front part of the hydraulic excavator, and 4 is a crusher. FIG. 6 is a side view of the driver's seat 2. In the figure, 5 is the seat of the driver's seat 2, 6 is a seat elevating mechanism such as a pantograph type or parallel link type, and 7 is a longitudinal slide mechanism for adjusting the position of the seat 5 in the longitudinal direction.

The height of the conventional driver's seat 2 can be changed within the range h to H by adjusting the seat lifting mechanism 6. Further, by adjusting the longitudinal slide mechanism 7, the seat 2 can be moved in the longitudinal direction within a range of stroke S.

Problems that the invention aims to solve Hydraulic excavators are used for excavation work by attaching a bucket to the work attachment, or for building demolition work by replacing a crusher with the tip. Therefore, when the driver visually observes the area directly below the front and back of the vehicle at an angle θ below the horizontal plane (HL), the driver performs driving operations while lifting the waist forward from the seat. Furthermore, when working in a high place at an angle α above the horizontal plane, the worker had to bend his neck to visually inspect the high place. As a result, drivers experience early fatigue, lower back pain, neck pain, etc., resulting in driving problems, and on the other hand, the driving posture is not normal, which poses operational risks.

The object of this invention is to solve the above-mentioned problems and provide a seat device in which a driver's seat can be rotated and adjusted in the longitudinal direction.

Means for Solving the Problems The means of this invention taken to solve the above problems are as follows: (a) A support frame is erected on the upper surface of the driver's cab floorboard, and a post member is slid vertically on the support frame. (b) Further, a bracket member is provided vertically near the center of the lower surface of the seat, and the bracket member and the upper end of the post member are connected to be rotatable in the front-rear direction, (c) A plate member is vertically disposed on the lower surface of the seat at a side position close to the bracket member, and a pin hole is bored in the lower end of the plate member, D.Meanwhile, a link lever is provided on the side of the support frame body. , the central part of the link lever is attached to the side boss of the support frame so as to be rotatable in the front and back direction,
and an elongated hole is bored in the upper side of the link lever along its longitudinal direction, and a guide pin is pivotally connected to the elongated hole and the pin hole of the plate member, and e. The fixed bracket and the lower end of the link lever are connected via a mechanical lock mechanism.

Operation B: When adjusting the tilt of the seat in either the forward or backward direction, press the knob located near the driver's seat, and the pressure is applied to the remote control mounting part of the mechanical lock mechanism via the link mechanism or push-pull cable. The lock of the mechanical lock mechanism is released.

(b) While the above knob is held down, the mechanical lock mechanism is unlocked. That is, the connecting portion between the bracket member on the underside of the seat and the upper end of the post member is in a freely rotatable state. Therefore, the driver can manually rotate the seat in the front and rear directions with light force.

(c) When the driver releases his/her finger from the knob after tilting the seat to a desired angle, the knob returns to its original position and the mechanical lock mechanism is locked again.

D. The seat can be tilted and adjusted to a desired longitudinal angle as described in items A to C above.

Embodiments Hereinafter, embodiments of this invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator equipped with a seat device 8 according to this invention. Second
The figure is a side view showing the seat device 8. In the figure, 9 is the driver's seat, 10 is the seat of the driver's seat 9, 11 is the seat lifting mechanism for the driver's seat 9, and 12 is the seat lifting mechanism 1.
1 is a lift locking part, 13 is a lift operation lever, 14
1 is the front and back sliding mechanism of the seat 10, 15 is the floor plate, 1
6 is a support frame, 17 is a post member, 18 is a bracket member, 19 is a pivot pin, 20 is a plate member, 21 is a pin hole in the plate member 20, 22 is a guide pin, 23 is a link lever, 24 is a link A long hole portion of the lever 23, 25 a pivot pin, 26 a fixing bracket, 27 a mechanical lock mechanism, 2
8 is a remote control mounting part of the mechanical lock mechanism 27, 29 is a push-pull cable, 3
0 is a knob. FIG. 3 is a front view seen from A in FIG. In the figure, 31 is the support frame 16
The side boss 32 is a spring member for the seat lifting mechanism 11. FIG. 4 is a side view of the seat device 8 showing a state in which the seat 10 is tilted in the longitudinal direction.

Next, the configuration of the seat device 8 according to this invention will be described with reference to FIGS. 1 to 4. Driver seat 1 floorboard 1
A support frame 16 is erected on the upper surface of 5, and the support frame 1
6, a post member 17 was fitted so as to be slidable in the vertical direction. Further, a bracket member 18 is vertically provided near the center of the lower surface of the seat 10, and the bracket member 18 and the upper end of the post member 17 are connected by a pivot pin 19 so as to be freely rotatable in the front and rear direction. Further, on the lower surface of the seat 10, the above-mentioned bracket member 18
A plate member 20 was vertically disposed at a side position close to the plate member 20, and a pin hole portion 21 was bored at the lower end of the plate member 20. On the other hand, a link lever 23 is provided on the side of the support frame 16, and the link lever 23
near the center of the side boss 31 of the support frame 16
The link lever 23 is attached so as to be rotatable in the front-rear direction, and an elongated hole 24 is bored in the upper side of the link lever 23 along its longitudinal direction, and the elongated hole 24 and the pin hole 21 of the plate member 20 are connected to the pin hole 21 of the plate member 20. The guide pin 22 was pivotally mounted. At the same time, a fixed bracket 26 provided on the floor plate 15 and the lower end of the link lever 23 are connected via a mechanical lock mechanism 27.

Next, the function of the seat device 8 according to this invention will be described with reference to Fig. 4. When adjusting the tilt of the seat 10 in either the forward or rearward direction, the knob 30 provided near the driver's seat 9 is pushed in the direction of the arrow A, and the pushing force acts on the remote control mounting portion 28 of the mechanical locking mechanism 27 via the push-pull cable 29 or a link mechanism (not shown), and the lock of the mechanical locking mechanism 27 is released. Then, the connection portion between the bracket member 18 on the underside of the seat 10 and the upper end of the post member 17 becomes freely rotatable. The driver can then rotate the seat 10 in the forward or rearward direction with a light manual force. For example, when the seat 10 is tilted backward, the seat 10 rotates about the pivot pin 19 between the bracket member 18 and the upper end of the post member 17 as a fulcrum, and the guide pin 22 of the plate member 20 rotates about the pivot pin 22 of the plate member 20.
The knob 30 slides along the elongated hole 24 of the link lever 23. At that time, the link lever 23 rotates about the pivot pin 25 as a fulcrum. When the driver has tilted the seat 10 to the desired angle α' and releases his/her fingers from the knob 30, the knob 30 returns to its original position and the mechanical locking mechanism 27 is locked again. As a result, the seat 10 is fixed in a state in which it is tilted backward by the angle α'. The seat 10 can also be tilted forward by the angle θ' in the same manner as above.

Effects of the Idea A hydraulic excavator can be used for excavation work by attaching a bucket to its work attachment, or for building demolition work by replacing a crusher with the tip. Therefore, when the driver visually inspects the area immediately below the front of the hydraulic excavator, he or she performs driving operations while lifting his/her waist forward from the seat. Also, when performing work at heights such as demolishing buildings, they bent their necks to visually inspect the heights. As a result, drivers experience early fatigue, lower back pain, neck pain, etc., resulting in driving problems, and on the other hand, the driving posture is not normal, which poses operational risks.

However, in the seat device according to this invention, a support frame is provided upright on the upper surface of the floorboard of the driver's cabin, and the post member is fitted into the support frame so as to be slidable in the vertical direction.
Further, a bracket member and a plate member were provided vertically on the lower surface of the seat, and the bracket member and the upper end of the post member were rotatably connected. Further, a link lever having an elongated hole is rotatably provided on the side of the sliding frame, so that the guide pin of the plate member can slide along the elongated hole. Then, the lower end of the link lever and the fixing bracket on the upper surface of the floor plate were connected via a mechanical lock mechanism. Therefore, the driver can rotate the seat forward and backward with light force by simply pushing the knob with their fingers.

Therefore, with the driver's seat device according to this invention, when the driver is working while visualizing directly below the front or near a high place, the driver can tilt forward or backward to a desired angle and sit in a comfortable position. You can operate the vehicle by This improves the driving posture and driving sensation during the above-mentioned work, and improves work efficiency and safety.

[Brief explanation of the drawing]

Fig. 1 is a side view of a hydraulic excavator equipped with a seat device according to this invention, Fig. 2 is a side view showing the seat device of this invention, Fig. 3 is a front view seen from A in Fig. 2, and Fig. 4 is a side view of a hydraulic excavator equipped with a seat device according to this invention. FIG. 5 is a side view of a seat device showing tilting of the seat, FIG. 5 is a side view of a hydraulic excavator, and FIG. 6 is a side view of a conventional driver's seat. 2, 9...driver's seat, 5,10...seat, 8...
Seat device, 16... Support frame body, 17... Post member, 18... Bracket member, 20... Plate member, 23... Link lever, 24... Elongated hole portion,
27...Mechanical lock mechanism.

Claims (1)

[Scope of utility model registration request] In a driver's seat installed in a construction vehicle, a support frame is erected on the upper surface of the floorboard of the driver's cabin, and a post member is fitted into the support frame so as to be slidable in the vertical direction. A bracket member is vertically disposed near the seat, and the bracket member and the upper end of the post member are rotatably connected in the front and rear direction, and a plate is provided at a side position near the bracket member on the lower surface of the seat. A member is installed vertically, and a pin hole is drilled in the lower end of the plate member, and a link lever is provided on the side of the support frame, and the vicinity of the center of the link lever is inserted back and forth into the side boss of the support frame. A long hole is formed in the upper side of the link lever along its longitudinal direction, and a guide pin is pivotally connected to the long hole and the pin hole of the plate member. Further, a driver's seat device characterized in that a fixed bracket provided on a floor plate of a driver's cabin and a lower end of the link lever are connected via a mechanical lock mechanism.