JPH0624277Y2 - Vehicle seat - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a vehicle seat suitable for use in various types of civil engineering such as shovel cars, vehicles for construction work, and the like.

[Conventional technology]

As shown in FIG. 4, in an excavator car 1 known as various industrial vehicles, particularly civil engineering and construction work vehicles, a shovel 3 is attached to the tip of an arm 2 extending toward the front of the vehicle. The operator H is provided with a seat 6 in the cockpit 5 which is provided in the substantially central portion of the vehicle body 4 in consideration of the center of gravity and the like.
Sit down and do the required shovel operation.

[Problems to be solved by the device]

However, in the above-described shovel car 1, the field of view from the worker H seated on the seat 6 is limited, as indicated by θ in FIG. The parts, etc., could not be seen in the seated state. On the other hand, in the shovel car 1 of this type, the part to be worked by the shovel 3 is often the invisible part, and therefore the worker H stands up every time work is required and the operating panel of the shovel 3 is operated. It is unavoidable that not only the operation is troublesome, but also the operator H feels tired, and it is necessary to take some measures.

[Means for Solving the Problems]

In order to meet such a demand, a vehicle seat according to the present invention includes a pair of front and rear links that support a seat cushion frame that constitutes a seat cushion on a seat fixing portion, a front end side of the seat cushion frame and a seat. The mechanical lock mechanism is provided between the fixed portion side and the fixed portion side to apply a pulling force to the front end portion of the seat cushion frame by a lock release operation.

[Action]

According to the present invention, the seat cushion supported by the pair of front and rear links is always kept substantially horizontal on the seat fixing portion while the mechanical lock mechanism is locked, and the mechanical lock mechanism is unlocked. By causing the rear side link to stand up by the accompanying pulling force, the seat cushion is tilted so that the rear end side of the seat cushion is higher than the front end portion.

〔Example〕

1 to 3 show an embodiment in which the vehicle seat according to the present invention is applied to a work seat for an excavator car. In these figures, the same or corresponding parts as those in FIG. 4 described above are designated by the same reference numerals. The description is omitted.

Here, in these drawings, a schematic structure of the seat 6 as a work seat will be briefly described. In the drawings, reference numeral 10 denotes a slide rail 12a, which constitutes a front and rear slide mechanism 12 as a seat fixing portion on a floor surface 11 of a vehicle compartment. A seat cushion supported via 12b, a seat back 13 arranged upright on the rear end side thereof, and a headrest 13a at the upper end thereof, which has a well-known seat structure, the details of which are omitted. There is.

Now, according to the present invention, in the seat 6 described above, the seat cushion 10 is placed on the front-rear slide mechanism 12 so that the rear end side is higher than the front end side, as is apparent from FIGS. 1 to 3. The feature is that it is supported so that it can be tilted. That is, according to the present invention, before supporting the seat cushion frame 20 constituting the seat cushion 10 on the slide rail 12b,
A pulling force is applied to the front end portion of the seat cushion frame 20 by an unlocking operation by a pair of rear links 21, 22 and an operation lever (not shown) provided between the front end side of the seat cushion frame 20 and the slide rail 12b. The mechanical lock mechanism 23 is provided. Further, in this embodiment, the pair of front and rear links 21, 22 is formed such that the front side link 21 is shorter than the rear side link 22.

In the figure, 24 and 25 are the frame 2 of the front link 21.
0, a pivotal support portion to the rail 12b, 26 and 27 are pivotal support portions to the frame 20 and the rail 12b of the rear side link 22, and in this embodiment, both ends of the mechanical lock mechanism 23 are connected to the upper end side pivotal portion of the front side link 21. 24 shows the case where the rear link 22 and the lower end side pivotal support portion 27 are connected to each other. However, the present invention is not limited to this, and may be arranged at an appropriate position as long as the same acting force can be obtained. Further, as the mechanical lock mechanism 23, for example, one having a well-known configuration as shown in Japanese Utility Model Laid-Open No. 50-95710 may be used, but the point is that a pulling force such as a return spring is applied by an unlocking operation. It suffices that the rear link 22 be acted on the front end portion of the frame 20 to change the rear link 22 from the inclined state to the rear of the seat to the standing state, and the stepless adjustment can be performed to lock the link at an appropriate position.

And according to such a structure, the seat cushion 1
0 is always kept substantially horizontal on the slide rail 12b in the locked state of the mechanical lock mechanism 23 (shown by the solid line in FIGS. 1 and 2), and the lock release operation of the mechanical lock mechanism 23 is performed. Since the rear link 22 is erected by the pulling force, the seat cushion 10
The seat cushion 1 is arranged so that the rear end side is higher than the front end side, as shown by the imaginary line in FIGS. 1 and 2.
0 can be tilted. Therefore, according to such a seat 6, the worker H can obtain a sitting posture that is almost the same as when he / she stood up while still sitting on the seat 6, and as a result, it is difficult to see the feet of the vehicle. It is possible to gradually widen the field of view so that the operator can visually recognize it even at such a work place as described above, and it is possible to exert an effect when operating a shovel or the like.

It should be noted that the present invention is not limited to the structure of the above-described embodiment, and the shapes and structures of the respective portions can be freely modified and changed as necessary, and various modifications can be considered. For example, in the above-described embodiment, the pair of front and rear links 21 and 22 that support the seat cushion 10 are replaced by the front link 21.
Shows a case in which it is formed shorter than the rear link 22, but it goes without saying that they may have the same length. In short, the links 21 and 22 keep the seat cushion 10 in a horizontal state at all times, and the mechanical lock mechanism 23 is unlocked to cause the rear link 2 to move.
It is preferable that the movement of 2 causes the rear end side of the seat cushion to be higher than the front end side.

Further, the vehicle seat according to the present invention is not limited to the work seat in the shovel car as described above, but can be applied to various work vehicles that require similar seating posture changes, and can exert the effect. .

[Effect of device]

As described above, according to the vehicle seat of the present invention, the pair of front and rear links that support the seat cushion frame that constitutes the seat cushion on the seat fixing portion, and the seat fixing to the front end side of the seat cushion frame. Since it is configured to include a mechanical lock mechanism that is provided between the seat cushion frame and the front side of the seat cushion frame to apply a pulling force to the front end portion of the seat cushion frame, the seat cushion can be always maintained in spite of its simple and inexpensive structure. Can be maintained in a substantially horizontal state on the seat fixing part when the mechanical lock mechanism is locked, and when the operator expands the field of view and performs work operations while looking at the feet of the vehicle, the mechanical lock mechanism Pull the rear link up by the pulling force of the lock release operation, and set the rear end side of the seat cushion more than the front end side. The seat cushion can be tilted so that various tasks can be performed while the seated posture is maintained, and various problems such as workability as in the past can be eliminated. There is.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a vehicle seat according to the present invention, FIG. 2 is a schematic side view of a seat cushion support portion which is a main portion thereof, and FIG. 3 is a schematic diagram showing a main portion configuration thereof. FIG. 4 is an exploded perspective view showing the schematic construction of a suitable shovel car to which the present invention is applied. In the figure, 1 ... shovel car, 4 ... vehicle body, 5 ... cockpit, 6 ... seat (vehicle seat), 10 ... seat cushion, 12 ... front / rear slide mechanism, 12a, 12b
...... Slide rails, 20 ...... Seat cushion frames 21,22 ...... Front and rear links, 23 ...... Mechanical lock mechanism, 24,25; 26,27 ...... Pivot support, H ...
…worker.

Claims (1)

[Scope of utility model registration request] 1. A lock provided between a pair of front and rear links for supporting a seat cushion frame constituting a seat cushion on a seat fixing portion, and a front end side of the seat cushion frame and a seat fixing portion side. The seat cushion frame is provided with a mechanical lock mechanism that applies a pulling force to the front end portion of the seat cushion frame, and the seat cushion is normally kept in a substantially horizontal state on the seat fixing portion in the locked state of the mechanical lock mechanism. A vehicle seat characterized in that a rear link is brought into an upright state in accordance with an unlocking operation, and a rear end side of a seat cushion is configured to be tiltable so as to be higher than a front end side.