JP2743482B2 - Industrial vehicle safety devices - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety device for protecting a driver during operation of an industrial vehicle.

(Prior art)

As shown in FIG. 7, conventionally, a forklift truck 9 is provided with a head guard 91 above a driver's seat 92 to protect the driver against falling objects from above.

On the other hand, in consideration of the event that the forklift truck 9 rolls over, a battery is not discharged from the battery case 8 under the driver's seat. That is, as shown in FIG.
Is composed of a main body case 80 and a battery hood 85 covering the main body case 80. Then, the battery case 8 is disposed and fixed between the cross plate 81 and the rear plate 82 fixed to the frame 95 of the forklift truck 9. Then, the battery 83 is inserted into the battery case 8.

The battery hood 85 is attached to the cross plate 81 above the main body case by hinges 84 so as to be openable and closable. The hinges 84, 84 are locked in hinge holes 811, 811 of the cross plate 81. A fixing pin 86 is provided behind the battery hood 85, and the fixing pin 86 is inserted into the pin hole 821 of the rear plate 82. The hinge 84 and the fixing pin 86 are provided so that the battery case 8 is not opened even when the vehicle body rolls over.
Safety locking pins 841 and 861 are provided.

Therefore, even if the forklift truck 9 rolls over, the driver is temporarily protected in the space between the driver seat on the battery case 8 and the head guard 91.

On the other hand, it is also conceivable that the driver is thrown out of the vehicle body without being held in the above-mentioned space when the vehicle rolls over, and becomes the underlay of the vehicle body.

Therefore, in order to cope with such a problem, a safety device disclosed in, for example, JP-A-62-240300 has been proposed. In this safety device, a support member is provided on each of the left and right sides of the upper frame of the head guard so as to be protrudable, a gas cylinder is connected to the support member, and a high-pressure gas supply cylinder is connected to the gas cylinder. It is. When the vehicle rolls over, the tilt angle of the vehicle body is detected by a tilt sensor, and a high-pressure gas is supplied to the gas cylinder based on the detection signal to cause the support member to protrude. The support member prevents the forklift truck from completely rolling over and protects the driver.

Japanese Utility Model Laid-Open Publication No. Sho 57-67096 proposes a safety device in which a projection is always projected from a head guard.

[Problem to be solved]

However, of the above prior arts, the former requires special devices such as a high-pressure gas cylinder, a gas cylinder, and a tilt sensor. In the latter case, the projections are always present, which hinders the operation of the forklift truck.

Further, the above-mentioned prior arts are safety devices that assume a state in which the vehicle has rolled over.

The same applies to side frames such as forklift trucks and shovel loaders.

In view of such a conventional problem, the present invention has a simple structure,
An object of the present invention is to provide a safety device for an industrial vehicle that can prevent rollover before it occurs.

[Solutions to solve the problem]

The present invention relates to a safety device provided on a side frame of an industrial vehicle such as a forklift truck to prevent the vehicle body from rolling over. The safety device operates a pendulum with respect to the side frame in a vehicle body side direction. A stopper plate that can be mounted
The stopper plate is always held so as not to operate the pendulum, and the stopper plate is bent inwardly of the side frame on its lower surface, and when the vehicle is about to roll over, A safety device for an industrial vehicle, comprising: a lower plate that supports a vehicle body in contact with the vehicle.

Most notable in the present invention is that a pendulum-operated stopper plate is provided on a side frame of an industrial vehicle, and a lock is provided so that the stopper plate does not always operate the pendulum.

As shown in the embodiment, the stopper plate is mounted on the side frame by a hinge or the like so that the pendulum can operate. The pendulum operation is configured to swing in the lateral direction of the industrial vehicle. The stopper plates are provided on the side frames on both sides of the vehicle body. One or more stopper plates are provided on one side frame. Multiple cases are useful if one stopper plate does not open.

As shown in FIGS. 2 and 3, the lower surface of the stopper plate is bent in an L-shape toward the inside of the side frame, and has a lower plate that contacts the ground and supports the vehicle body when the vehicle body is inclined. Also, on the lower surface of the lower plate of the stopper plate,
It is preferable to provide unevenness (FIG. 5) for preventing slip, a rubber plate, and the like.

In addition, the safety device is provided with a locking member so that the stopper plate does not always perform the pendulum operation. However, when the vehicle body leans and rolls over,
The structure must allow the stopper plate to swing out to the side of the vehicle body by the pendulum operation (FIG. 4).
At this time, the inclination angle of the vehicle body is about 30 degrees or less. Such a configuration includes a locking pin shown in FIGS.
There is a magnet (magnet) shown in the figure.

Further, it is also possible to provide a tilt sensor for detecting the tilt of the vehicle body, disconnect the connection between the locking member and the stopper plate, and operate the stopper plate with a pendulum according to a signal from the tilt sensor.

(Operation)

In the present invention, when an industrial vehicle such as a forklift truck inclines on a laterally inclined surface or the like and the vehicle body is about to roll over, the stopper plate disengages from the locking device and the stopper plate is moved by the pendulum operation. Swing the lower part to the side of the vehicle. The lower plate provided at the lower end of the stopper plate is in contact with the ground to support the vehicle body, thereby preventing further inclination and rollover. Therefore, the driver can grip the vehicle body or escape from the vehicle body.

Also, during normal operation, the pendulum does not operate because the stopper plate is locked by the locking tool. Therefore, there is no hindrance to the operation of the industrial vehicle, and no noise is generated by the pendulum operation of the stopper plate during operation.

(Effect)

Therefore, according to the present invention, it is possible to provide a safety device for a side frame which has a simple structure and can prevent the vehicle body from rolling over.

〔Example〕

First Embodiment A safety device for an industrial vehicle according to an embodiment of the present invention will be described.
This will be described with reference to FIGS. Safety device 1 of this example
Is applied to the forklift truck 9.

As shown in FIGS. 1 to 3, the safety device 1 includes a stopper plate 10 operably mounted on a side frame 90 of a forklift truck 9 and a stopper provided on a lower surface of the side frame 90. And a locking pin 901.

The stopper plate 10 has a lower plate 101 bent inwardly below the side frame 90, and has an L shape as a whole. The lower plate 101 has a notch 103 as shown in FIG. 5, and a stopper 102 is fixed near the opening of the notch 103. The locking pin 901 is inserted into the notch 103. The width of the notch 103 and the diameter of the locking pin 901 are substantially the same.

The upper part of the stopper plate 10 is mounted on the spacer 12 via the hinge 11 as shown in FIGS. The spacer 12 is fixed to the side frame 90 by welding 121.

The stopper plate 10 is mounted on the left and right side frames 90 of the forklift truck 9 respectively.

 Next, the function and effect will be described.

First, during normal operation, the stopper plate 10 is in a state of being suspended by the hinge 11. The lower plate 101 of the stopper plate 10 is located below and inside the side frame 90.

A locking pin 901 provided at the lower end of the side frame 90
As shown in FIGS. 2 and 3, the stopper plate 10
Is located outside the stopper plate 10 in the notch hole 103. Further, the diameter of the locking pin 901 is substantially the same as the width of the notch 103, and both are in contact.
Therefore, the stopper plate 10 is loosely held by the locking pin 901.

Therefore, when the forklift truck 9 is operating, the stopper plate 10 is held without pendulum operation in the left-right direction of the side frame 90. Therefore, operation of the forklift truck is not hindered, and no noise is generated by the operation of the pendulum.

Next, when the vehicle body is inclined on a laterally inclined surface or the like and a danger of rollover occurs, as shown in FIG. 4, the stopper plate 10 causes the pendulum operation with the hinge 11 as a fulcrum.
Then, the lower plate 101 of the stopper plate 10 is swung out of the side frame 90. Therefore, the lower plate 101 comes into contact with the ground E. As a result, the forklift truck 9 that is tilting is supported by the stopper plate 10, and further tilting is prevented.

That is, in FIG. 4, in order to prevent the center of gravity C of the vehicle body from coming out of the contact point A of the tire 94 due to its inclination and not to roll over, in the present embodiment, the pendulum is actuated below the stopper plate 10 when the vehicle body is inclined. Swing the plate outward, and further outwardly of the contact point A of the tire 94, the stopper plate
It is configured to provide a grounding point B by 10. Therefore, the vehicle body does not roll over.

In addition, when a lateral pressing force is further applied during the inclination, the stopper plate 10 plays a role of absorbing the impact, and the damage to the driver can be minimized.

In addition, at the time of the inclination, the lower plate 101 of the stopper plate 10 is swung outward by the pendulum operation. However,
A locking pin 901 is inserted into the notch 103 of the lower plate 101,
A stopper 102 is provided at the opening of the notch 103.
Therefore, at the time of swinging, the stopper 102 does not come into contact with the locking pin 901 and the lower plate 101 does not swing significantly outward. Therefore, the stopper plate 10 is securely grounded as shown in FIG.

As described above, according to this example, it is possible to prevent the vehicle from rolling over with a simple structure.

Second Embodiment As shown in FIG. 5, the safety device of the present embodiment is provided with an uneven portion 15 on the lower surface of the lower plate 101 of the stopper plate 10 in the first embodiment.

According to this example, when the vehicle body is tilted, the uneven portion 15 comes into contact with the ground, thereby preventing the lower plate 101 from slipping. Therefore, the rollover can be more reliably prevented than in the first embodiment. Further, the same effects as in the first embodiment can be obtained.

Third Embodiment In this embodiment, a magnet plate (permanent magnet plate) 16 is mounted inside the stopper plate 10, and the magnet plate 90 is also provided outside the side frame 90 so as to face the magnet plate 16.
5 is provided. The stopper plate 10 is mounted similarly to the first embodiment.

According to this example, the stopper plate 10 is attracted to the side frame 90 by the magnet plates 16 and 905. Therefore, during normal operation, the stopper plate does not operate as a pendulum.

However, when the vehicle body tilts, a pendulum operation occurs in which the lower plate 101 of the stopper plate 10 is swung outward with the hinge as a fulcrum. And the pendulum operating force is a magnet
Greater than the suction force between 16,905. Therefore, the rollover of the vehicle body can be prevented by the stopper plate 10 as in the first embodiment. Therefore, the same effect as in the first embodiment can be obtained.

[Brief description of the drawings]

1 to 4 show the safety device of the first embodiment, FIG. 1 is an overall perspective view of a forklift truck, FIG. 2 is a perspective view of the safety device, FIG. 3 is a plan view of a stopper plate, and FIG. 4 is an explanatory view of vehicle body rollover prevention, FIG. 5 is a side view of a stopper plate of the second embodiment, FIG. 6 is a cross-sectional view of a main part of the safety device of the third embodiment, and FIGS. FIG. 7 is a perspective view of a conventional forklift truck, and FIG. 8 is an exploded perspective view of a battery case. 1 Safety device, 10 Stopper plate, 103 Notch hole, 11 Hinge, 15 Uneven portion, 16,905 Magnet, 9 Forklift truck, 90 Side frame, 901 Stop pin,

Claims (1)

(57) [Claims] 1. A safety device provided on a side frame of an industrial vehicle such as a forklift truck for preventing the vehicle body from rolling over, the safety device comprising a pendulum in a side direction of the vehicle body with respect to the side frame. A stopper plate operably mounted on the vehicle body, and a stopper which normally holds the stopper plate so as not to operate as a pendulum. Is about to overturn,
An industrial vehicle safety device having a lower plate that supports a vehicle body in contact with the ground.