JPH0415577Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to an interlock device for an engine hood in an industrial vehicle.

(Prior Art) Conventionally, in an industrial vehicle, for example, an engine-powered forklift, an engine hood rotatably attached for maintenance and inspection of the engine, etc. has a driver seat provided above it. When the engine hood is opened, a caution label is attached to the side of the driver's seat to prevent the driver's seat from colliding with various members attached to the rear of the vehicle body.

(Problem that the invention aims to solve) However, with only a caution label, it relies only on the driver's attentiveness, and if the driver accidentally opens the hood, the driver seat will be attached to the rear of the vehicle. In some cases, the vehicle collided with various other components, damaging both components.

The purpose of this invention is to solve the above-mentioned problems and provide an interlock device for an engine hood in an industrial vehicle that can reliably prevent collision and damage between the driver seat and the members behind the seat.

Composition of the invention (Means for solving the problem) In order to achieve the above object, this invention has a driver seat placed thereon, an engine hood that is rotatably supported rearward together with the seat, and an engine hood at the rear of the engine hood. an avoidance position in which at least one of a restriction member that restricts the rotation of the driver seat and a rotation obstacle disposed at a rear position of the driver seat does not interfere with the other when the driver seat rotates; interference avoidance means for moving the driver seat or rotational obstacle to the avoidance position; position detection means for detecting displacement of the driver seat or rotational obstacle made movable by the interference avoidance means to the avoidance position; The gist of the invention is to include a release means for releasing the restriction on rotation of the engine hood by the restriction member when displacement of an object to the avoidance position is detected.

(Operation) When the driver seat or the rotating obstacle is moved to the avoidance position by the interference avoidance means, the displacement is detected by the position detection means. Then, based on this detection, the release means is activated, and the rotation restriction of the engine hood by the restriction member is released. However, if displacement to the avoidance position is not detected, the release means does not operate, and the engine hood is held in a rotationally restricted state by the restricting member.

(Example) An example in which the interlock device of this invention is applied to an engine-type forklift that uses LP gas as fuel will be described below with reference to the drawings.

In FIG. 1, a body frame 2 of a forklift 1 is provided with an engine hood (hereinafter simply referred to as a hood) 3 for protecting an engine and electrical components mounted on the upper part of the body frame 2. The hood 3 connects its base end to the rear part 4 of the vehicle body of the forklift 1.
As shown in FIG. 3, the hood 3 is attached to the hood 3 so that it can be rotated rearward using a hinge pin 5 that engages the hood 3. The hood 3 can be opened using a handle hole 6 formed in the hood 3 to maintain the engine and electrical components. We are making inspections possible. Driver seat (hereinafter simply referred to as seat)
7 is fixed to the upper side of the hood 3, and
rotates with.

A pair of left and right rear frame pillars (hereinafter simply referred to as pillars) 8 erected on the vehicle body frame 2
A pair of upper and lower mounting arms 9a and 9b provided at the rear of seats a and 8b are formed at approximately the same height as the backrest of the seat 7. The cylinder bracket 10, which serves as an interference avoidance means, is used to place a cylinder 11 filled with LP gas and which acts as a rotational obstacle, and its base end is connected to the hinge pin 12 with respect to the mounting arm 9b of the right pillar 8b. It is pivotally supported so as to be rotatable rearward, and its distal end is connected to the mounting arm 9a of the left pillar 8a by a connecting pin 13 that can be inserted into and removed from the mounting arm 9a.

A limit switch 14 as a position detection means attached to the right pillar 8b is a switch that detects the rotational position of the bracket 10, and when the seat 7 rotates rearward, the bracket 10 interferes with the rotation. It turns off when it is in the position, and turns on when it is in the avoidance position where it does not interfere.

In FIG. 3, a hook 15 as a regulating member
is rotatably attached to the vehicle body frame 2 by a hinge pin 16 at its base end, and its tip end hook portion 15a is attached to the hook hole 1 formed in the hood 3.
7 to restrict rotation of the hood 3. The spring 18 has one end connected to the vehicle body frame 2 and the other end connected to the hook 15, and provides an elastic force so that the hook 15 is always engaged with the latching hole 17.

An electromagnetic solenoid 19 serving as a release means has an actuator 19a connected to the hook 15, and operates based on the operation of the limit switch 14. When the switch 14 is on, the electromagnetic solenoid 19 operates and releases the hook via the actuator 19a. 15 is rotated against the elastic force of the spring 18. Based on this rotation, the hood 3 is disengaged from the hook 15. A battery 20 for supplying power to the electromagnetic solenoid 19 is disposed in the frame 2, and is electrically connected to the limit switch 14 and the electromagnetic solenoid 19 by cables 21 and 22, as shown in FIG.

Next, the operation of the interlock device constructed as described above will be explained.

Now, when the tip of the cylinder bracket 10 is connected to the mounting arm 9a by the connecting pin 13, that is, when the cylinder 11 is in the interference position where it interferes with the rotation of the seat 7, the limit switch 1
4 is in contact with the same bracket 10 and is turned off. Therefore, the electromagnetic solenoid 19 does not operate, and the hook 1
5 is held in engagement with the latch hole 17. As a result, the hood 3 cannot be opened.

Next, the cylinder bracket 10 is attached to the mounting arm 9.
When the cylinder 11 is disconnected from the seat 7 and rotated, that is, when the cylinder 11 is in an avoidance position where it does not interfere with the rotation of the seat 7, the limit switch 14 is released from the bracket 10 and turned on. Therefore, the electromagnetic solenoid 19 is activated and the hook 15 is removed from the latching hole 17. As a result, the hood 3 can be opened.

As described above, in this embodiment, the cylinder bracket 10 on which the cylinder 11 is mounted is mounted on the pillars 8a, 8.
Since the hood 3 cannot be opened while connected to the mounting arms 9a and 9b of b, the hood 3 will not be opened carelessly and the seat 7 attached to the hood 3 will not collide with the cylinder 11. Therefore, damage to the sheet 7, cylinder 11, cylinder bracket 10, etc. can be prevented.

Note that this invention is not limited to the above-mentioned embodiments, and may be implemented as follows.

As shown in FIGS. 5 and 6, in a forklift 1 having a muffler 31 as a rotational obstacle erected on the rear part 4 of the vehicle body, a seat 7 collides with the muffler 31 and the muffler 31 is damaged. The invention of the present application may be applied to prevent this from happening.
In this case, the muffler 31 is connected to the exhaust pipe 32.
Hinge pin 33 constituting interference avoidance means for
The limit switch 14 is fixed to the rear part 4 of the vehicle body, and is turned on only when the muffler 31 is rotated clockwise in FIG. 6 to avoid collision with the seat 7.

Further, as shown in FIG. 7, the seat 7 is slid forward by a slide mechanism (not shown) as an interference avoidance means to prevent it from colliding with the rear cylinder bracket 10 and muffler 31 when the hood 3 is rotated. It may also be applied to forklifts. In this case, a wire cable 36 is provided, one end of which is fixed to the back of the seat 7 and the other end connected to the center of the hook 15 via support members 34 and 35, which are respectively attached to the hood 3 and the vehicle body frame 2. . Then, by sliding the seat 7 forward, the wire cable 36 is connected to the hook 15.
is rotated clockwise to remove the hook portion 15a from the latch hole 17 of the hood 3, thereby allowing the hood 3 to rotate.

The point of this invention is that when the hood 3 is to be opened and the hood 3 is rotated, the seat 7 is in a positional relationship where it collides with various members that are rotational obstacles provided at the rear part 4 of the vehicle body. Any device may be used as long as it has a structure that restricts the hood 3 so that it cannot be opened and, conversely, releases the rotation restriction of the hood 3 when the hood 3 is displaced to a position that avoids a collision.

Effects of the invention As detailed above, according to this invention, the positional relationship between the driver seat and the rotational obstacle placed behind the seat can be shifted to a positional relationship where they do not interfere with each other when the seats are rotated, by means of interference avoidance means. Since the engine hood cannot be rotated backwards unless the engine hood is rotated, it is possible to reliably prevent collisions and damage between the driver seat and rotational obstacles when the hood is rotated, and this is useful as an interlock device for engine hoods in industrial vehicles. This is an excellent idea in practical terms.

[Brief explanation of the drawing]

Figure 1 is a side view of a forklift embodying this idea, Figure 2 is a plan view showing how the cylinder bracket is installed, Figure 3 is a sectional side view of the main part showing how the interlock device is installed, and Figure 4 is a side view of a forklift embodying this idea. Figure 5 is an electrical circuit diagram showing the electrical configuration of the interlock device.
6 are a side view and a side view of a main part of a forklift showing another example of this invention, and FIG. 7 is a side sectional view of a main part showing a state in which an interlock device is installed, also showing another example. In the figure, 1 is a forklift, 2 is a vehicle body frame, 3 is an engine hood, 4 is a rear part of the vehicle body, 6 is a hand hole, 7 is a driver seat, 8a and 8b are rear frame pillars, and 10 is a cylinder bracket as an interference avoidance means. , 14 is a limit switch as a position detection means, 15 is a hook as a regulating member, 15a is a hook portion, 17 is a latching hole, 18
19 is a spring, 19 is an electromagnetic solenoid as a release means, 31 is a muffler, and 36 is a wire cable.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An engine hood on which a driver seat is placed and supported so as to be able to rotate rearward together with the seat, a regulating member that restricts rearward rotation of the engine hood, and a driver seat or Interference avoidance means for moving at least one of the rotating obstacles arranged at the rear position of the driver seat to an avoidance position where it does not interfere with the other when the driver seat rotates, and the interference avoidance means can be moved. position detection means for detecting displacement of the driver seat or rotational obstacle to the avoidance position; when the position detection means detects displacement of the driver seat or rotational obstacle to the avoidance position; An interlock device for an engine hood in an industrial vehicle, comprising a release means for releasing rotation restriction of the engine hood by a restriction member. 2. An interlock device for an engine hood in an industrial vehicle according to claim 1, wherein the position detection means is a limit switch. 3. An interlock device for an engine hood in an industrial vehicle according to claim 1, wherein the release means is an electromagnetic solenoid, and the actuator thereof is connected to a regulating member consisting of a hook. 4. The position detecting means and the releasing means are wire cables connected at one end to the driver seat and at the other end to a regulating member consisting of a hook. Interlock device. 5. The interference avoidance means is a bracket that is horizontally rotatable about the base end supported by a hinge pin, and a rotational obstacle is placed on the bracket.A utility model registration request. An interlock device for an engine hood in an industrial vehicle according to item 1.