JP3235282B2 - Industrial vehicle safety bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety bar for preventing a driver from being thrown out of a vehicle when an industrial vehicle falls.

[0002]

2. Description of the Related Art In an industrial vehicle for cargo handling, etc.,
If a vehicle falls, it is important for safety measures to prevent the driver from being thrown out of the vehicle. This is because if the driver protrudes out of the vehicle or is released, the driver may be placed under the vehicle. As one of the measures, there is a method of protecting the driver by surrounding the torso or chest of the driver sitting in the driver's seat with a rigid protection ring (seat bar).

That is, as shown in FIG. 7, a seat bar 91 is provided which rotates about an axis 911 behind the driver's seat. During operation, the seat bar 91 is lowered as indicated by the solid line, and the seat bar 91 surrounds the driver's torso to protect the driver from being thrown out of the driver's seat.

In FIG. 7, reference numeral 92 denotes a sheet bar 9.
1 is a stopper for holding the moving member 1 in a lowered state. Seat bar 91
When the hook-shaped head 921 of the stopper 92 is pulled out from the stopper hole provided in the hook 912, the seat bar 91 is raised to the position indicated by the chain line by the restoring force of the restoring damper 93.

[0005] The head of the rod 931 of the restoration damper 93 is pivotally attached to the end of the short arm 913 of the seat bar 91 located at one side of the axis 911. The short arm 913 is the axis 91
When pivoted about 1, the long arm 914 of the seat bar 91 pivots in the opposite direction.

In FIG. 1, reference numeral 94 denotes a sheet bar 9.
1 is an operation wire for lowering the driver 1 and is connected to an end of a pedal provided under the driver's seat. When the pedal is depressed, the operation wire 94 is moved to the long arm 914 of the seat belt 91.
, And the sheet bar 91 descends. The lowered sheet bar 91 is held in the lowered state by using the stopper 92 as described above.

[0007]

However, the conventional driver protection device (safety bar) 90 has the following problems. That is, first, when the industrial vehicle is not driven and the seat bar 91 is at the upper position (the position indicated by the dashed line in FIG. 7), the seat bar 91 hinders getting on and off the industrial vehicle.

Further, it is necessary to prevent the engine hood and the battery hood from colliding with the long arm 914 of the seat bar 91 when the engine hood and the battery hood are opened and closed. As a result, the opening angle of the engine hood or the battery hood is limited, or the structure is restricted.

That is, as shown in FIG. 7, when the engine hood 95 is opened around the rotation shaft 951 as shown by an arrow,
It collides with the sheet bar 91. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a safety bar for an industrial vehicle that does not hinder getting on and off the vehicle and does not hinder opening and closing operations of an engine hood and the like.

[0010]

According to the present invention, there is provided a safety bar for an industrial vehicle for preventing a driver's body from protruding outside the vehicle when the vehicle falls down.
A slide rail vertically mounted along the rear pillar, a lifting member having a roller rolling on the slide rail, and an inverted U protruding from the lifting member toward the driver's seat.
It has a seat bar shaped like a letter, a locking device for locking the lifting member at the height of the driver's torso or chest, and a restoring member for pushing the lifting member upward. Located on the safety bar of industrial vehicles.

In the present invention, the most notable point is that a slide rail is provided which runs vertically along the rear pillar, and the rollers of the elevating member roll along the slide rail, and the elevating member is moved. Is going up and down.
The slide rail may be formed integrally with the rear pillar itself, or may be formed of a member different from the rear pillar.

[0012] The second point of most noteworthy is a locking device for locking the lifting member at the height of the driver's torso or chest.
That is, a restoring member that pushes the elevating member upward is provided. The locking device is capable of fixing the elevating member at a predetermined position on the slide rail, and uses a hook-shaped hook (see FIG. 7), a ratchet (see FIG. 5), and the like. There are various types.

The restoring member can push up the elevating member upward along the slide rail, and includes a cylinder device, a restoring damper, a spring, and the like. The restoring member includes a member that is manually operated, a member that is operated by an external signal, and a member that is biased in a predetermined direction such as a spring or a restoration damper.

The elevating member is provided with an inverted U-shaped seat bar protruding toward the driver's seat. The shape of the seat bar may be any as long as it surrounds the driver's torso or chest, and does not require a strictly U-shape. Therefore, it includes shapes such as a square, a circle, and a horseshoe.

It is preferable that the restoring member is an automatic restoring member which is urged to push up the elevating member automatically without any external operation. Then, when the locking member is released from the locked state, the lifting member is automatically restored without operating the restoring member, so that the operation is simple. Further, since a mechanism for operating the restoring member and a mechanism for stopping the restoring member are not required, it can be constituted by a cheap member such as a spring.

It is preferable that a release member is provided in conjunction with the operation lever or the operation pedal to release the locking state of the locking member. That is, the locking state of the locking member can be released by one operation of operating the operation lever or one operation of depressing the operation pedal, so that the convenience of the operation is greatly improved.

Further, if the release member is used together with the automatic restoration member, the convenience is further improved. This is because, by one operation of operating the operation lever or the operation pedal, the lifting member is unlocked and automatically returns to the original position. Further, since the lock is always released by manually applying the lock release action, the lock is not accidentally released due to, for example, vibration.

The releasing member and the locking member include, for example, the following. The locking device has a ratchet attached to the elevating member, and a ratchet pole pivotally mounted on the rear pillar. The ratchet pole has a pawl portion meshing with the ratchet, and a ratchet pole. And a driving piece for rotating the.

The release member is provided with an operation lever for release operation and an operation wire suspended between the operation lever and the driving piece. With this configuration,
By operating the operation lever to operate the driving piece by the operation wire, the pawl portion of the ratchet pawl can be pulled off the ratchet to release the lock.

[0020]

The lifting and lowering member of the safety bar according to the present invention can roll up and down by rolling the roller along the slide rail. When using the safety bar, lower the elevating member, lower the seat bar to the specified height of the driver's torso or chest, and lock the seat bar with the locking device.
Fix the lifting member (seat bar).

When the use of the safety bar is stopped, the locking state of the locking member is released, and the lifting member is raised by the restoring member. Then, the seat bar is raised to above the driver together with the lifting member. Unlike the conventional safety bar, the safety bar according to the present invention raises and lowers the seat bar in a parallel state instead of rotating the seat bar. Therefore, the seat bar can be raised in a horizontal state by parallel movement to a position near the ceiling. .

Therefore, the elevating member can be held in a state parallel to the ceiling near the ceiling (head guard), and does not incline by rotation unlike the seat bar in the conventional safety bar. Therefore, it does not hinder the driver from moving up and down, and does not collide with the elevating member even when the engine hood and the battery cover are opened and closed.
As described above, according to the present invention, it is possible to provide a safety bar for an industrial vehicle that does not hinder getting on and off the vehicle and does not hinder opening and closing operations of the engine hood and the like.

[0023]

Embodiment 1 A safety bar according to an embodiment of the present invention is shown in FIGS.
This will be described with reference to FIG. As shown in FIG. 1, this example is a safety bar 10 of an industrial vehicle 8 that prevents a driver's body from protruding outside the vehicle when the vehicle falls.
The safety bar 10 is, as shown in FIG.
11 and 812, a slide rail 11 mounted vertically and a roller 14 rolling on the slide rail 11.
Elevating member 13 having an elevating member 1 as shown in FIG.
An inverted U-shaped seat bar 15 protruding from the driver's seat 3 toward the driver's seat 82, and a locking device 20 for locking the lifting member 13 at the height of the driver's torso or chest as shown in FIG. And a restoring member 17 that pushes the elevating member 13 upward.

The restoring member 17 is an automatic restoring damper which is urged to push up the elevating member automatically without any external operation. In addition, it has a release member 30 (FIG. 2) that releases the locked state of the locking tool 20 in conjunction with the operation lever 31 shown in FIG.

As shown in FIG. 2, the latch 20 has a ratchet 21, and a ratchet pole 22 rotatably mounted on the rear pillars 811 and 812. The ratchet pole 22 includes a pawl portion 23 that meshes with the ratchet 21,
And a driving piece 24 for rotating the ratchet pawl 22. On the other hand, the release member 30 has an operation lever 31 (FIG. 1) for the release operation, and an operation wire 32 suspended between the operation lever 31 and the driving piece 24.

Hereinafter, each of them will be described in detail. As shown in FIGS. 3 and 4, a pair of left and right rear pillars 811 and 812 located behind the driver's seat 82 is formed with a slide rail 11 on which the roller 14 can roll. The slide rail 11 is located inside the rear pillars 811 and 812, that is, on the left side in the right rear pillar 812 shown in FIG.
The left rear pillar 811 shown in FIGS. 1 to 3 is formed on the right side.

As shown in FIG. 3, the elevating member 13 is connected to the main arm 131, the roller 14, the sub-arm 132, the auxiliary roller 141 attached to the sub-arm 132, and a rod 171 of a restoration damper to be described later. Long axis 1
33.

The roller 14 is mounted in the slide rail 11 and rolls along the slide rail 11. The auxiliary roller 141 is provided on the front surface 8 of the rear pillars 811, 812.
13 and holds the main arm 131 in a horizontal position.

The long shaft 133 is provided with rear pillars 811, 812.
Is projected to the outside of the rear pillar, and its end 134 is connected to the rod of the restoration damper 171. On the outer surface 814 of the rear pillar 81, the long axis 1
A narrow groove 815 (FIG. 2) for raising and lowering 33 is formed.

A restoration damper as a restoration member 17 is provided upright below the outer portions of the rear pillars 811 and 812. The rod 171 is connected to the end of the long shaft 133 of the elevating member 13 as described above. 134. A biasing force is applied to the restoration damper in a direction in which the rod 171 is extended.

A seat bar 15 is mounted in front of the main arm 131 of the elevating member 13 as shown in FIG. The seat bar 15 is a U-shaped tubular member that connects between the left and right elevating members 13.

As shown in FIG. 2, a ratchet 21 constituting the locking member 20 is mounted outside the long axis 133 of the elevating member 13. The ratchet 21 has several claws, and the outer surface 81 of the rear pillars 811, 812.
4 are located on the surface. Also, the rear pillars 811, 81
At a middle height of the second outer surface 814, a ratchet pole 22 constituting the locking tool 20 is attached.

As shown in FIG. 2, the ratchet pawl 22 rotates about a pole shaft 221 provided on the outer side surface 814 of the rear pillars 811 and 812, and has a pawl portion 23 having a pawl that engages with the pawl of the ratchet 21. And a drive piece 24 protruding in a direction perpendicular to the claw portion 23.

A coil spring 25 is mounted between a projection in the middle of the driving piece 24 and a projection 251 obliquely above the pole shaft 221. The coil spring 25 is biased to rotate the ratchet pawl 22 in a direction in which the pawl portion 23 meshes with the ratchet 21.

The end of the drive piece 24 is connected to an operation wire 32 of a release member 30, which will be described later. As shown in FIG. 1, an operation lever 31 connected to the operation wire 32 is attached to a lower front portion of the driver's seat 82.

The operating wire 32 is bent from the end of the operating lever 31 in a substantially perpendicular direction at a bending point 321 below the rear pillar 81, and the driving piece 2 of the ratchet pole 22 is bent.
4 is connected to the tip. The refraction point 321
Is located at the same point as the center of rotation when the engine hood is opened, and even when the engine hood is opened, the operation wire 32 is not loosened. When the operation lever 31 is operated, the operation wire 32 is moved as shown in FIG.
Pull down.

As a result, the ratchet pole 22 rotates clockwise, and the ratchet 21 and the ratchet pole 2
The meshing state of the second claw is released. Also, the operation lever 31
Is released, the ratchet pawl 22 and the operating lever 3 are released.
1 is restored to the original position by the coil spring 25.

Next, the operation and effect of the safety bar 10 of this embodiment will be described. During normal times when the driver does not get on, the lifting member 13 of the safety bar 10 is pushed up by the rod 171 of the restoration damper, and the head guard 83 is lifted.
(Fig. 1) It has risen to the bottom. When the driver gets on the vehicle and pulls the seat bar 15, the roller 14 of the elevating member 13 rolls on the slide rail 11, and the elevating member 13 descends together with the seat bar 15.

When the elevating member descends to the position of the driver's chest, the ratchet 21 of the locking portion 20 and the pawl portion 23 of the ratchet pawl 22 mesh with each other to lock the elevating member 13 from rising. The ratchet 21 is provided with several claws, and the locking position of the elevating member 13 can be adjusted slightly.

The lifting member 13 maintains the stopped state due to the upward biasing force of the restoration damper and the locking action of the locking member 20. When the driving is completed and the driver intends to get off, the driver 85 operates the operation lever 31.

As a result, the driving piece 24 of the ratchet pawl 22 is pulled down by the operation wire 32, and the meshing state between the ratchet 21 and the ratchet pawl 22 is released.
Then, the lifting member 13 released from the locking is moved to the restoring member 17.
And is restored to the normal position below the head guard 83.

In the safety bar 10 of this embodiment, the seat bar 15 can be raised to a position directly below the head guard 83 at a normal position where the safety bar 10 is not used. And the seat bar 15 can be held in a horizontal state without tilting. Therefore, the safety bar 10 at the normal position does not hinder the driver from getting on and off. Further, even if the engine hood 84 and the battery hood are opened, there is no possibility of collision with the safety bar.

When the safety bar 10 is lowered, it is automatically locked at a predetermined position by the ratchet 21. When the operation lever 31 is operated, the safety bar 10 is automatically restored to the original position. Thus, the operation of the safety bar 10 is extremely simple. As described above, according to the present embodiment, it is possible to provide a safety bar for an industrial vehicle that is excellent in operability without hindering getting on / off the vehicle or hindering the opening / closing operation of the engine hood or the like.

Embodiment 2 In this embodiment, as shown in FIG. 6, the slide rail 12 is attached to the rear of the rear pillar 810 without being formed integrally with the rear pillar 810 in the first embodiment. In this case, the entire safety bar 100 can be formed of a member separate from the vehicle body, and can be conveniently attached to an existing industrial vehicle later. Slide rail 12
Are separate members, and the main arm 13 of the elevating member 13
1 is slightly longer. For the others, Example 1
Is the same as

[Brief description of the drawings]

FIG. 1 is a side view of a safety bar according to a first embodiment.

FIG. 2 is an enlarged front view of an essential part of a left rear pillar of the elevating member according to the first embodiment (a front view of a portion A in FIG. 1).

FIG. 3 is a sectional plan view taken along line BB of FIG. 2;

FIG. 4 is a front view of an elevating member at a right rear pillar in the first embodiment.

FIG. 5 is an explanatory diagram of the operation of the locking device of the first embodiment.

FIG. 6 is a side view of the safety bar according to the second embodiment.

FIG. 7 is a side view of a conventional safety bar.

[Explanation of reference numerals] . . 10. safety bar, . . Slide rails, 13. . . 14. elevating members, . . Seat bar, 17. . . Restoring member, 20. . . Locking device, 30. . . Release member, 81. . . Rear pillar, 82. . . driving seat,

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 22/20-22/24 B60R 22/12 E02F 9/16 A63G 21/04 B66F 9/075

Claims (4)

(57) [Claims] 1. A safety bar for an industrial vehicle for preventing a driver's body from protruding out of the vehicle when the vehicle falls, etc. The safety bar includes a slide rail mounted vertically along a rear pillar. An elevating member having a roller rolling on the slide rail, an inverted U-shaped seat bar protruding from the elevating member toward a driver's seat, and an elevating member provided on the driver's trunk or chest. A safety bar for an industrial vehicle, comprising: a locking member that locks at a height; and a restoring member that pushes the lifting member upward. 2. The safety bar according to claim 1, wherein the restoring member is an automatic restoring member which is urged to push up the elevating member automatically without an external operation. 3. The safety bar for an industrial vehicle according to claim 1, further comprising a release member that is released from a state in which the locking member is released in conjunction with the operation lever or the operation pedal. 4. The locking device according to claim 3, wherein the locking tool has a ratchet attached to the elevating member and a ratchet pole rotatably mounted on a rear pillar. The release device has a pawl for meshing with the ratchet, and a drive piece for rotating the ratchet pawl, while the release device is provided with an operation lever for releasing operation, and an operation lever for the release lever and the drive piece. A safety bar for an industrial vehicle, comprising: an operation wire suspended therebetween.