JPH1159348A - Wheel stopper lock device and wheel stopper lock system including the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel stopper lock device which prevents a wheel stopper used with a towing tractor or the like from dropping from a storage part, prevents the failure to apply a parking brake at the time of parking the vehicle, and prevents the vehicle from starting with the vehicle stopper held locked, and a wheel stopper lock system including the lock device. SOLUTION: A wheel stopper 4 is stored in a storage part 5 and comprises blocks 4a, 4b and a connecting member 4c connecting the blocks 4a, 4b together, with a hole 4b' formed in the block 4b. A brake lever 8 is operated in parking a vehicle, and when pulled in the direction indicated by the arrow A, moves a lock pin 10 upward along a pin guide 11 via a link plate 9. By operating the brake lever 8 in the opposite direction to the direction indicated by the arrow A, the lock pin 10 is moved downward via the link plate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a wheel stopper used for a towing tractor or the like, and a wheel stopper locking system including the locking device.

[0002]

2. Description of the Related Art Today, parking brakes (side brakes) are provided to prevent a parked vehicle from starting to move from a passenger car to an industrial vehicle. Also, when parking on a steep slope or a slippery road, not only parking brakes but also wheel stoppers are used for tires. In particular, industrial vehicles often use wheel stoppers to prevent the vehicle from moving during loading and unloading. For example, in a transportation vehicle such as a towing tractor used for transporting luggage at an airport, loading and unloading of luggage is performed using a wheel chock.

For this reason, the above-mentioned vehicles are provided with wheel stoppers dedicated to individual vehicles, and when the wheel stoppers are not used, the wheel stoppers are stored in a storage portion to move the vehicle. Further, a step is provided in the storage section as described above to prevent the wheel stopper from dropping from the vehicle due to vibration or the like.

[0004]

However, the step provided in the conventional wheel stop storing portion is formed relatively low so as not to hinder the access of the wheel stop. Therefore, for example, when the vibration of the vehicle is large, there is a problem that the wheel stopper drops.

On the other hand, when the driver of the vehicle parks the vehicle,
If you forget to apply the parking brake, you may need to load or unload your luggage. In addition, we put wheel stopper on tire,
After the work is performed, the vehicle is often started with the wheel stopped.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and prevents a wheel stopper from dropping from a storage portion, prevents forgetting to apply a parking brake when parking a vehicle, and further applies a wheel stopper. It is an object of the present invention to provide a lock device for a wheel stopper that does not start a vehicle as it is, and a wheel stopper lock system including the lock device.

[0007]

According to the first aspect of the present invention, there is provided a brake lever operated when a parking brake of a vehicle is operated, a wheel stopper housed in a housing, and the brake lever. Wheel stop having lock means for locking the wheel stop when the brake lever is moved to the position of the brake release state and unlocking the wheel stop when the brake lever is moved to the position of the brake drive state in conjunction with the operation of This can be achieved by providing a locking device.

Here, the brake lever is a lever that is operated when operating a parking brake provided on an industrial vehicle such as a towing tractor. For example, the brake is applied by pulling the brake toward the user and returning the lever. This is a lever that releases the parking brake. The wheel stopper is a device that locks the tire on the ground, and prevents the vehicle from starting to move during parking.

The locking means is driven in conjunction with the operation of the brake lever, and locks the wheel stopper when the brake lever is moved to a position where the brake is released.
It is configured to release the lock of the wheel stopper when moved to the position of the brake driving state, and includes a lock member and a mechanism for fitting the lock member into the hole of the wheel stopper. Note that a lock pin, a lock lever, or the like is used as the lock member.

With this configuration, for example, when driving (moving) the vehicle, the brake lever is moved to the position where the brake is released (for example, the brake lever is returned), and the wheel stopper is locked by the lock member. . Therefore, during driving of the vehicle (during movement of the vehicle), the wheel stopper is securely locked by the lock mechanism, and the wheel stopper does not drop from the storage part.

On the other hand, for example, when the vehicle reaches the destination, it is necessary to stop the wheels in order to carry out the work of lifting and lowering the load.
In such a case, the wheel chock is removed from the storage portion, but the lock of the wheel chock is not released unless the brake lever has moved to the position of the brake driving state. Therefore, if a worker accidentally forgets to operate the brake lever,
The wheel stopper is locked by the lock mechanism, the wheel stopper cannot be removed from the storage portion, and it can be easily recognized that the brake lever has not been operated.

A second aspect of the present invention embodies the first aspect of the present invention, wherein the wheel stopper lock means includes a link mechanism having one end attached to the brake lever, and a second end of the link mechanism. And a lock member fitted into a hole provided in the wheel stopper.

The link mechanism connects the brake lever and the lock member and transmits the movement of the brake lever to the lock member in accordance with the operation of the brake lever. The link mechanism rotates, for example, both the brake lever and the lock member. The lever is movably mounted.

With this configuration, the driving force of the brake lever is transmitted to the lock pin via a link mechanism formed of, for example, a lever, and when the brake lever is moved to the position where the brake is released, the wheel stopper is closed. When locking and preventing the dropping of the wheel stopper while the vehicle is moving, when moving the brake lever to the position of the brake driving state,
The lock of the wheel chock is released, and the wheel chock can be taken out. Therefore, when the brake lever is not moved to the position of the brake driving state, the lock of the wheel stopper is not released and the wheel stopper cannot be taken out of the storage portion, so that it is easily understood that the parking brake is not applied.

According to a third aspect of the present invention, when the brake lever is moved to a position where the brake is released, the link mechanism operates.
When the lock member is fitted into the hole of the wheel stopper, the wheel stopper is locked, and the brake lever is moved to the position of the brake driving state, the link mechanism operates to release the engagement of the lock member. In this configuration, the lock of the wheel stopper is released.

With this configuration, for example, the lock member composed of a lock pin is fitted into the hole provided in the wheel stopper, and the wheel stopper is securely locked in the storage portion.
Even if the vehicle vibrates violently, the wheel stopper does not fall from the storage section.

A fourth aspect of the present invention embodies the first aspect of the present invention, wherein the wheel stopper lock means includes, for example, a first and a second brake lever having one end attached to the brake lever.
It is configured to include a second two wires and a lock member to which the other ends of the two wires are respectively attached and which are fitted into holes provided in the wheel stopper.

Here, the first and second two wires are respectively attached between the brake lever and the lock member. For example, the second wire is used to move the brake lever to the position where the brake is released. The operation force of the brake lever is transmitted to the lock member to lock the wheel stopper. On the other hand, when the first wire moves the brake lever to the position of the brake driving state, the lock pin is unlocked from the wheel stopper by the operation force of the brake lever.

According to a fifth aspect of the present invention, when the brake lever is moved to a position where the brake is released, the second wire is connected to the lock member (for example, When the lock pin is depressed and the lock member is fitted into the hole of the wheel stop to lock the wheel stop, while the brake lever is moved to the position of the brake driving state, the first wire is locked by the lock. The member is pushed up, the fitting of the lock member is released, and the lock of the wheel stopper is released.

According to this structure, the locking member is fitted into the hole provided in the wheel stopper, and the wheel stopper is securely locked in the storage portion. Never fall from

The sixth aspect of the present invention embodies the first aspect of the present invention, wherein the wheel stopper locking means includes, for example, a lever having one end attached to the brake lever, and a lever having one end attached to the other end of the lever. The pinion rack gear is provided and operates in conjunction with the drive of the lever, and a lock member attached to the tip of the pinion rack gear.

The lever used in this embodiment is, for example, a U-shaped lever. One end of the U-shaped lever is attached to the brake lever, and the other end of the U-shaped lever is attached to the pinion rack gear. ing. And
By driving the brake lever, the operating force of the brake lever is transmitted to the pinion and rack gear via a U-shaped lever, and the lock pin provided at the tip of the pinion and rack gear is driven to lock the wheel stopper. Configuration.

According to a seventh aspect of the present invention, when the brake lever is moved to a brake release position, for example, the dogleg-shaped lever is driven and the pinion is moved. When the rack gear is driven, the locking member is fitted into the hole of the wheel stopper, the wheel stopper is locked, and when the brake lever is moved to the position of the brake driving state, the lever is driven in the opposite direction. The pinion rack gear is driven to release the engagement of the lock member and release the lock of the wheel stopper.

According to this structure, the locking member is fitted into the hole provided in the wheel stopper, and the wheel stopper is securely locked in the storage part. Never fall from

An eighth aspect of the present invention embodies the first aspect of the present invention, wherein the wheel stopper locking means includes a first rod having one end attached to the brake lever, and a first rod. A rotating lever rotatably attached to the rod, and a second lever rotatably attached to the rotating lever.
And a lock lever provided at the other end of the rod mechanism, rotated in accordance with the drive of the rod mechanism, and fitted into a hole provided in the wheel stopper.

With this configuration, the first and second rods are combined, the lock member is fitted in the hole of the wheel stopper, and the wheel stopper is fixed to the storage portion to prevent the wheel stopper from falling. Can be.

According to a ninth aspect of the present invention, when the brake lever is moved to a position where the brake is released, the first rod moves the rotary lever to the first position. When the lock lever is fitted into the hole of the wheel stopper to lock the wheel stopper and move the brake lever to the position of the brake driving state. The first rod pivots the rotary lever to a second position, drives the second rod to release the engagement of the lock lever, and release the lock of the wheel stopper. .

A tenth aspect of the present invention embodies the first aspect of the present invention.
For example, a changeover switch that is driven in conjunction with the operation of the brake lever, a drive signal output unit that outputs a drive signal in accordance with an output of the changeover switch, and a lock member provided on the wheel stopper by an output of the drive signal output unit. And an electromagnetic lock fitted into the hole.

Here, the changeover switch is a switch that is turned on and off by operating the brake lever, and is constituted by a push switch such as a microswitch. The drive signal output means is an electric circuit that outputs a drive signal according to a signal output from the microswitch or the like. Further, the electromagnetic lock drives the electromagnetic lock according to a drive signal output from the drive signal output means,
The locking member is driven to lock the wheel stopper.

With this configuration, when the brake lever is operated, the brake lever turns on and off the micro switch, and the electromagnetic lock is driven according to the position of the brake lever to lock the wheel stopper.

According to a twelfth aspect of the present invention, when the brake lever is moved to a position where the brake is released, the changeover switch is actuated and the drive signal output means is turned on. Output drive signal,
When the electromagnetic lock is driven to fit the lock member into the hole of the wheel stopper, the wheel stopper is locked, and when the brake lever is moved to the position of the brake driving state, the drive from the drive signal output means is performed. The output of the signal is stopped, the drive of the electromagnetic lock is released, and the lock of the wheel stopper is released.

With this configuration, locking and releasing of the wheel stopper can be easily performed without using a complicated mechanism. The drive signal output means is an electric circuit that outputs a drive signal in accordance with the movement position of the brake lever switched by the microswitch or the like.
It may be realized using a computer circuit composed of U, ROM, and RAM.

According to a twelfth aspect of the present invention, in order to solve the above-mentioned problems, a brake lever operated when a parking brake of a vehicle is operated, a wheel stopper stored in a storage part, and a brake lever interlocked with the operation of the brake lever, A lock mechanism that locks the wheel stopper when the brake lever is moved to the position where the brake is released, and blocking means that prevents operation by the lock mechanism when the wheel stopper is not stored in the storage portion. This can be achieved by providing a buckle lock system having:

This embodiment is an invention having a configuration in which a wheel stop lock preventing device for preventing the operation is combined with the wheel stop lock device. That is, the present embodiment is configured to include a blocking unit that prevents the operation of the wheel stopper by the lock mechanism when the wheel stopper is not stored in the storage unit,
The blocking means performs an operation of preventing the lock member such as the lock pin or the lock lever from entering the storage portion.
Note that the blocking means is not limited to the case where the lock pin or the lock lever is not made to enter the storage portion, and may be, for example, a configuration that does not fit into a hole formed in the wheel stopper.

With this configuration, unless the wheel stopper is stored in the storage portion, the operation of the lock mechanism is prevented. For example, the brake is used to move the vehicle without removing the wheel stopper after the work is completed. When the lever is operated, the blocking means cannot operate the brake lever because the wheel stopper pin of the lock member cannot enter the storage portion, so that the operator can know that the wheel stopper has not been removed.

The thirteenth aspect of the present invention embodies the twelfth aspect of the present invention, wherein the inhibiting means comprises an operation inhibiting pin and a spring member for applying an urging force to the operation inhibiting pin. When the wheel stopper is not stored in a predetermined position of the storage portion, the operation preventing pin prevents the locking operation of the wheel stopper by the locking means by the urging force of the spring member.

Here, the storage of the wheel stopper in the storage part is released, for example, by the operator returning the operation blocking pin against the urging force of the spring member and placing the wheel stopper in a predetermined position of the storage part. It is a configuration that is performed. The released tip of the operation blocking pin abuts, for example, on the side surface of the wheel stopper.

According to a fourteenth aspect of the present invention, the above-mentioned twelfth aspect is also embodied, wherein the blocking means comprises an operation blocking pin and electromagnetic means for driving the operation blocking pin, and the wheel stopper is provided. When not stored in a predetermined position of the storage portion, the operation preventing pin prevents the locking operation of the wheel stopper by the locking means.

In this embodiment, the blocking means is composed of an electromagnetic circuit and an operation blocking pin driven by a drive signal from the circuit, and prevents the locking operation of the wheel stopper without using a complicated mechanism. Configuration.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. <First Embodiment> FIG. 1 is an external view of a towing tractor employing a wheel stopper lock device of the present embodiment.
In the figure, the towing tractor 1 is, as described above,
This is a vehicle used for carrying luggage at airports and the like.
And carry the luggage. In addition, towing tractor 1
Is towing a container-type vehicle by the towing tractor 1.

The wheel stopper 4 used in the present embodiment is configured to be stored in a storage section 5, and the storage section 5 is provided in the towing tractor 1.
Is provided between the front wheel 6 and the rear wheel 7. FIG. 2 shows a state in which the wheel stopper 4 is stored in the storage unit 5. The wheel stopper 4 used in this example has a configuration in which two blocks 4a and 4b are connected by a connecting member 4c. Here, the connecting member 4
c is formed of, for example, a pipe and is welded to the blocks 4a and 4b.

On the other hand, the brake lever 8 is used when the towing tractor 1 of this embodiment is parked, and the parking brake is applied to the towing tractor 1 by operating the brake lever 8. The brake lever 8 drives a vehicle stop lock device.

FIG. 2 is a view for explaining the structure of the wheel stopper lock device. In FIG. 1, the wheel stopper lock device includes the wheel stopper 4, the brake lever 8, and the wheel stopper locking means. The wheel stopper lock means includes a link plate 9 as a link mechanism connected to the brake lever 8 and a lock pin 10 as a lock member connected to the link plate 9. Brake lever 8
Is provided with a grip portion 8a, and a joining plate 8b is welded to a side portion. One end of the link plate 9 is rotatably mounted via a link pin 8b 'provided on the joining plate 8b. The other end of the link plate 9 is rotatably attached to the tip 10b of the lock pin 10 via a link pin 10b '.

The lock pin 10 is configured to be able to move up and down along the pin guide 11 provided on the storage section 5 described above, and is provided on the storage section 5 when the lock pin 10 moves downward. It is a configuration that penetrates into the hole. When the wheel stopper 4 is stored in the storage part 5, the hole 4 b ′ provided in the one block 4 b of the wheel stopper 4 is located immediately below the hole provided in the storage part 5. Therefore, when the lock pin 10 moves downward along the pin guide 11, the lock pin 10 passes through a hole (not shown) provided in the storage portion 5 and fits into the hole 4b 'of the block 4b (wheel stopper 4). It is a configuration that matches.

The processing operation of the wheel stopper lock device having the above configuration will be described below. As described above, the wheel stopper lock device has the configuration shown in FIG. 2, in which the brake lever 8 is in the position of the brake driving state fully pulled in the direction of arrow A. At this time, the link plate 9 moves in the same direction via the link pin 8b ', and at the same time, the lock pin 10 moves to the top along the pin guide 11 via the link pin 10b. The lock pin 1 shown in FIG.
0 indicates the state of the lock pin at the uppermost position.

On the other hand, FIG. 3 shows the position of the brake released state where the brake lever 8 is sufficiently returned in the direction of arrow B. Therefore, in this case, the link plate 9 also moves in the same direction, and lowers the lock pin 10 along the pin guide 11 (in the direction of arrow B ').
And lock the tip 10a of the lock pin 10 with the block 4b.
In the hole 4b '.

Therefore, in this embodiment, in order to move the towing tractor 1, the parking brake is released and then the towing tractor 1 is operated as shown in FIG. 4) is in a state fitted in the hole 4b '. For this reason, the wheel stopper 4 is securely locked by the lock pin 10 and does not drop from the storage unit 5 due to vibration or the like.

On the other hand, when parking the towing tractor 1 and loading or unloading luggage, for example, the wheel stopper 4 is taken out of the storage portion 5 and attached to the front wheel 6 or the rear wheel 7. However, at this time, if the wheel stopper lock device is in the state shown in FIG. 3, the wheel stopper 4 cannot be removed from the storage part 5. That is, the wheel stopper 4 cannot be taken out of the storage unit 5 when the parking brake is not applied.

Therefore, when the driver notices that he has forgotten to pull the parking brake and pulls the brake lever 8 in the direction of arrow A, the lock pin 10 comes off the hole 4b 'of the wheel stopper 4 (block 4b) as shown in FIG. The wheel stopper 4 can be taken out. With this configuration, the work can be performed with the parking brake applied to the towing tractor 1 reliably. <Second Embodiment> Next, a second embodiment of the present invention will be described.

FIGS. 4A and 4B are diagrams for explaining a second embodiment of the present invention. FIG. 7A is a diagram when the brake lever 8 is in a parking brake driving state, and FIG. 7B is a diagram when the brake lever 8 is in a released state.

In this embodiment, the structure of the towing tractor 1 to be used is the same as that shown in FIG. 1 described above, and the wheel stopper 4 used in this embodiment is also stored in the storage portion 5. The towing tractor 1 is provided between the front wheel 6 and the rear wheel 7. The wheel stopper 4 used in the present embodiment also has a configuration in which two blocks 4a and 4b are connected by a connecting member 4c.

Hereinafter, the structure of the wheel stopper lock device of this embodiment will be described with reference to FIGS. 4 (a) and 4 (b). In this example, a wheel stopper lock device is configured using a wire mechanism. In this example, two wires are used, and the first wire is used.
One end of the wire 15 is attached to the joint plate 8b provided inside the brake lever 8, and the other end is attached to the tip 10b of the lock pin 10. The wire 16 serving as the second wire has one end attached to a joint plate 8c provided outside the brake lever 8 and the other end attached to a lever 10c provided transversely to the lock pin 10.
The above-mentioned first and second wires and the lock member constitute wheel stopper locking means.

The wire 15 is joined to the joining plate 8b and the tip 10b by wire fixing brackets 17a, 17b.
It is attached using. Similarly, the bonding of the wire 16 to the bonding plate 8c and the lever 10c is also performed using the wire fixing brackets 18a and 18b. The pulley 19 is used to stretch the wire 15 and to change the direction of the tension applied to the wire 15.
Similarly, the pulleys 20 and 21 are used for stretching the wire 16 and for changing the direction of the tension applied to the wire 16.

The lock pin 10 is configured to be able to move up and down along the pin guide 11 provided on the storage section 5 described above.
The configuration for penetrating the holes (not shown) provided in the first embodiment is the same as that of the above-described embodiment. Further, when the wheel stopper 4 is stored in the storage part 5, the hole 4 b ′ provided in the one block 4 b of the wheel stopper 4 is located immediately below the hole provided in the storage part 5. Is the same as

The processing operation of the wheel stopper lock device having the above configuration will be described below. The wheel stopper lock device has a configuration shown in FIG. 4A, in which the brake lever 8 is fully pulled in the direction of arrow A. Therefore, at this time, since the upward driving force acts on the lock pin 10 via the wire 15, the lock pin 10 moves to the uppermost portion along the pin guide 11.

On the other hand, FIG. 6B shows a state in which the brake lever 8 is fully returned in the direction of arrow B, and a state in which the parking brake is released. Therefore, in this case, since a downward driving force acts via the wire 16, the lock pin 10 moves to the lowermost position along the pin guide 11. Therefore, at this time, the tip 10a of the lock pin 10 penetrates a hole (not shown) provided in the storage portion 5 and is fitted in the hole 4b 'of the block 4b (wheel stopper 4).

Therefore, also in this example, when the parking brake is released and the towing tractor 1 is driven to move the towing tractor 1 as shown in FIG. The wheel stopper 4 is securely locked by the lock pin 10 so that the wheel stopper 4 does not drop from the storage part 5 due to vibration or the like while the towing tractor 1 is moving.

On the other hand, when parking the towing tractor 1 and loading / unloading luggage, it is necessary to take out the wheel stopper 4 from the storage portion 5 and attach it to the front wheel 6 or the rear wheel 7. However, at this time, if the brake lever 8 is forgotten to be pulled, as shown in FIG.
Can not be taken from Therefore, the driver notices that he has forgotten to pull the parking brake, and can pull out the wheel stopper 4 by pulling the brake lever 8 in the direction of arrow A.

As described above, the wheel stopper lock device using the wire mechanism of the present embodiment reliably prevents the wheel stopper 4 from dropping from the storage part 5 and operates the parking brake when the towing tractor 1 is parked. It is possible to provide a wheel stopper lock device that does not forget the following. <Third Embodiment> Next, a third embodiment of the present invention will be described.

FIGS. 5A and 5B are diagrams for explaining a third embodiment of the present invention. FIG. 7A shows a case where the brake lever 8 is in a parking brake driving state, and FIG. 7B shows a case where the parking brake is released.

In this embodiment, the configuration of the towing tractor 1 to be used is the same as that shown in FIG. 1, and the wheel stopper 4 used in this embodiment is also stored in the storage portion 5. The towing tractor 1 is provided between the front wheel 6 and the rear wheel 7. The wheel stopper 4 used in the present embodiment also has a configuration in which two blocks 4a and 4b are connected by a connecting member 4c, and a hole 4b 'is formed in the block 4b.

However, the hole 4b 'formed in the block 4b (wheel stopper 4) used in this embodiment is a hole formed in the side surface of the block 4b. That is, in the first embodiment and the second embodiment described above, the hole 4b 'is formed on the upper surface of the block 4b (wheel stopper 4), whereas the block 4b (wheel stopper 4) used in this example is used. ) Has a hole 4b 'formed in the side surface thereof.

Hereinafter, the structure of the wheel stopper lock device of this embodiment will be described with reference to FIGS. 5 (a) and 5 (b). In this example, a wheel stopper lock device is configured using a pinion / rack gear mechanism. Further, in this embodiment, a dog-shaped lever 23 is used to transmit the driving force of the brake lever 8 to the pinion rack gear.

The lock pin 12 as a lock member used in this embodiment is attached to the tip of the rack gear 25, and the lock pin 1 is moved with the left and right movement of the rack gear 25.
2 is also configured to fit into a hole 4b 'formed in the block 4b. In addition, the hole 4b 'formed in the above-mentioned block 4b.
A hole (not shown) is provided in the storage section 5 facing the.

On the other hand, the movement of the rack gear 25 is performed in accordance with the rotation of the pinion gear 26. When the pinion gear 26 rotates clockwise, the rack gear 25 moves to the left in the drawing and locks the lock pin 12 with the hole 4b 'of the block 4b (wheel stopper 4). Fits. When the pinion gear 26 rotates counterclockwise, the rack gear 25 moves rightward on the paper surface, and pulls out the lock pin 12 from the hole 4b 'of the block 4b (wheel stopper 4). The rack gear 25 moves on the rack table 27 left and right.

The U-shaped lever 23 is disposed between the brake lever 8 and the pinion gear 26, and the U-shaped lever 23 and the brake lever 8 are joined by link pins 8c 'provided on the joining plate 8c. The connection between the U-shaped lever 23 and the pinion gear 26 is performed by a connecting plate 29. The connecting plate 29 has an upper end 29a rotatably attached to the above-described U-shaped lever 23, and a lower end 29b fixed to the rotation shaft of the pinion gear 26. The lever 23 and the rack gear 2 described above are used.
5, the pinion gear 26 and the lock pin 12 constitute a wheel stopper locking means.

The processing operation of the above-structured wheel stopper lock device will be described below. The wheel stopper lock device of the present embodiment has a configuration shown in FIG. 5, and the brake lever 8 is fully pulled in the direction of arrow A in FIG. Therefore, at this time, the pinion gear 26 rotates counterclockwise by the action of the dog-shaped lever 23, and the rack gear 25 moves the maximum distance to the right in the drawing. Therefore, at this time, the lock pin 12 has also moved the maximum distance to the right, and the tip of the lock pin 12 has been removed from the hole 4b 'of the block 4b (wheel stopper 4).

On the other hand, FIG. 6B shows a state in which the brake lever 8 has been fully returned in the direction of arrow B, and a state in which the parking brake has been released. In this case, the pinion gear 26 rotates clockwise, contrary to the above, and the rack gear 25 also moves the maximum distance to the left in the drawing. Therefore, at this time, the lock pin 12 has also moved the maximum distance to the left, and the tip of the lock pin 12 is fitted in the hole 4b 'of the block 4b (wheel stopper 4).

Therefore, also in this example, in order to move the towing tractor 1, even if the parking brake is released and the towing tractor 1 is operated as shown in FIG. The wheel stopper 4 is securely locked by the lock pin 12 and does not fall out of the storage part 5 due to vibration or the like.

Conversely, when parking the towing tractor 1 and loading / unloading luggage, the wheel stopper 4 is taken out of the storage section 5. At this time, if the brake lever 8 is forgotten to be pulled, the state shown in FIG.
Cannot be taken out of the storage unit 5. Therefore,
The driver notices that he has forgotten to pull on the parking brake, and pulls the brake lever 8 in the direction of arrow A, so that the wheel stopper 4 can be taken out.

As described above, even with the wheel stopper lock device using the pinion / rack gear mechanism of the present embodiment, it is possible to reliably prevent the wheel stopper 4 from dropping from the storage part 5,
In addition, it is possible to provide a wheel stopper lock device that does not forget to operate the parking brake when parking the towing tractor 1. <Fourth Embodiment> Next, a fourth embodiment of the present invention will be described.

FIG. 6 is a diagram for explaining a fourth embodiment of the present invention. Also in this example, the configuration of the towing tractor 1 used is the configuration shown in FIG. 1 described above, and the wheel stopper 4 used in this example is also stored in the storage section 5, and the storage section 5 is Is provided between the front wheel 6 and the rear wheel 7. The wheel stopper 4 used in the present embodiment also has a configuration in which two blocks 4a and 4b are connected by a connecting member 4c.

However, the block 4b (wheel stopper 4) used in the present embodiment is formed with a groove 4b "as a hole, and has a configuration in which a rotating lock lever is fitted. In this example, the lock lever 30 is fitted to the block 4b in order to lock the wheel stopper 4 as described above, and the drive of the brake lever 8 is applied to the lock lever 30. The lock lever 30 is configured to rotate the lock lever 30 in the direction of the arrow, that is, a rod mechanism is formed between the brake lever 8 and the lock lever 30. The rod mechanism includes two first and second rods 3.
1 and 32 and a rotating lever 33 that joins the rods 31 and 32. The above-described rotation of the lock lever 30 in the direction of the arrow is such that the movement of the brake lever 8 is transmitted by the above-described rod mechanism by operating the brake lever 8 in the direction of the arrow, and the lock lever 30 is rotated. In this example, the rods 31 and 32 and the rotary lever 3
3. The joining pin 30 'constitutes a wheel stopper locking means.

The rod 31 has a brake lever 8 at one end.
Is rotatably connected via a joining plate 8c and a joining pin 8c 'provided at the other end, and the other end is provided with a rotating lever 33 and a joining pin 33.
It is rotatably connected via a. In addition, rod 3
2 has one end rotatably connected to the rotation lever 33 via a connection pin 33b, and the other end connected to the lock lever 30 via a connection pin 30 '.

The processing operation of the wheel stopper lock device having the above configuration will be described below. The wheel stopper lock device of the present embodiment has a configuration shown in FIG. 6, and a state where the towing tractor 1 is parked is a state where the parking brake is fully pulled forward (in the direction of arrow A) as shown in FIG. The rod 31, the rotation lever 33, and the rod 32 are at positions (second positions) indicated by solid lines in FIG. Therefore, at this time, the lock lever 30 is also in the state of the solid line position shown in FIG. Therefore, at this time, the wheel stopper 4 can be pulled out from the storage part 5 and used, and the wheel stopper 4 can be attached to the front wheel 6 or the rear wheel 7 for use.

On the other hand, from this state, the towing tractor 1
When the brake lever 8 is operated in the direction of arrow B in order to operate the rotary lever 33, the rotary lever 33 rotates by a predetermined angle via the rod 31, and the rotary lever 30 further rotates to the position indicated by the dotted line via the rod 32. That is, the rotation lever 30 is rotated by moving the above-mentioned brake lever 8 in the direction of arrow B (moving the rotation lever 30 to the first position), and the tip 30a of the rotation lever 30 is moved to the block 4b (the wheel stopper 4). Therefore, in this case, the wheel stopper 4 is securely locked by the lock lever 30 and does not drop from the storage portion 5 due to vibration or the like.

On the other hand, when parking the towing tractor 1 and loading / unloading the luggage, the wheel stopper 4 is taken out of the storage section 5 and used. However, if the brake lever 8 is forgotten, the wheel stopper 4 cannot be taken out. Therefore,
In this case, the driver immediately notices that he has forgotten to pull the brake lever 8, and pulls the brake lever 8 in the direction of arrow A, whereby the wheel stopper 4 can be taken out.

As described above, also in the wheel stopper lock device using the rod mechanism of the present embodiment, the fall of the wheel stopper 4 from the storage portion 5 is reliably prevented, and the parking brake is operated when the towing tractor 1 is parked. It is possible to provide a wheel stopper lock device that does not forget the following. <Fifth Embodiment> Next, a fifth embodiment of the present invention will be described.

FIG. 7 is a view for explaining a fifth embodiment of the present invention. Also in this example, the configuration of the towing tractor 1 used is the configuration shown in FIG. 1 described above, and the wheel stopper 4 used in this example is also stored in the storage section 5, and the storage section 5 is Is provided between the front wheel 6 and the rear wheel 7. The wheel stopper 4 used in the present embodiment also has a configuration in which two blocks 4a and 4b are connected by a connecting member 4c, and a hole 4b 'is formed in the block 4b.

Hereinafter, the configuration of the present example will be specifically described with reference to FIG. In this example, for example, a microswitch 35 as a changeover switch is installed at a position where the brake lever 8 is turned on when the brake lever 8 is operated to the position where the parking brake is released. The ON / OFF signals of the microswitch 35 are output to a drive circuit 36 as drive signal output means, and the drive circuit 36 creates a drive signal for driving the electromagnetic lock 37.
Then, the drive circuit 36 outputs the created drive signal to the electromagnetic lock 37, and drives the electromagnetic lock 37. For example, the electromagnetic lock 37 has a built-in lock pin (solenoid) 38, and when the micro switch 35 is turned on, the drive circuit 36 outputs a drive signal for driving the lock pin 38 downward, and when the micro switch 35 is turned off, the drive circuit is turned off. 36 outputs a drive signal for driving the lock pin 38 upward.

Therefore, when the parking brake is fully pulled forward (in the direction of arrow A) as shown in the figure while the towing tractor 1 is parked, the microswitch 35 is turned off and the drive circuit 36 is turned off. Lock pin 3
8 is output. Therefore,
At this time, the lock of the block 4b (wheel stopper 4) is released, the wheel stopper 4 can be pulled out from the storage part 5 and used, and the wheel stopper 4 can be attached to the front wheel 6 or the rear wheel 7 for use.

On the other hand, from this state, the towing tractor 1
When the brake lever 8 is tilted in the direction of arrow B to drive the motor, the above-described micro switch 35 is turned on, and the drive circuit 36 outputs a drive signal for driving the lock pin 38 downward. Therefore, at this time, the block 4b (wheel stopper 4)
The lock pin 38 fits into the hole 4 b ′ of the lock member 4, and the wheel stopper 4 can be locked in the storage portion 5. Therefore, the towing tractor 1 is operated in this state, and even if there is severe vibration during this time, the wheel stopper 4 is securely locked and does not fall out of the storage section 5.

In the above-described configuration, the microswitch 35, the drive circuit 36, and the lock pin 38 constitute a wheel stopper locking means. <Sixth Embodiment> Next, a sixth embodiment of the present invention will be described.

FIGS. 8 and 9 are views for explaining a sixth embodiment of the present invention. Also in this example, the configuration of the towing tractor 1 used is the configuration shown in FIG. 1 described above, and the storage section 5 used in this example is also stored in the storage section 5, and the storage section 5 is a front wheel of the towing tractor 1. 6 and between the rear wheel 7. In addition, this embodiment has a different configuration from the first to fifth embodiments described above, and describes an example of a wheel stopper lock system (wheel stopper lock prevention device).

In this embodiment, for example, as described above, the pin guide 1
By preventing the lock pin 10 moving up and down along 1 from descending, the parking brake is prevented from being released while the wheel stopper 4 is attached to the tire. Hereinafter, a specific description will be given.

In the figure, a lock preventing pin 40 and a spring member 41 for applying an urging force to the lock preventing pin 40
It functions as lock prevention means, and the lock prevention pin 40 moves right and left along the pin guide 42. Further, one end of the spring member 41 is fixed to the stopper 43, and the other end is attached to the lock prevention pin 40 described above. Therefore, when the wheel stopper 4 is not stored in the storage section 5, the lock prevention pin 40 is at a position where the lock pin 10 that moves up and down is prevented from descending by the urging force of the spring member 41.

In such a configuration, when the wheel stopper 4 is stored in the storage section 5, the state shown in FIG. 9 is obtained. However, when the wheel stopper 4 is stored in the storage part 5, the worker moves the lock prevention pin 40 to the left side of the drawing against the urging force of the spring member 41, and stores the wheel stopper 4 in the storage part 5. Therefore, by setting the wheel stopper 4 in the storage section 5 in this manner, the lock pin 10 can be moved downward, and the lock on the lock pin 10 is released.

Therefore, the lock prevention pin 4
In order to release the lock of the lock pin 10 by moving the wheel stop 0, it is necessary to always store the wheel stopper 4 in the storage part 5, and if the wheel stopper 4 is not stored in the storage part 5, the lock pin No movement by 10 is possible. That is, the parking brake cannot be released by operating the brake lever 8. From this, for example, even if an attempt is made to move the towing tractor 1 with the wheel stopper 4 attached to the tire by mistake, the parking brake cannot be released and the wheel stopper 4 is not removed.

As described above, according to the present embodiment, the towing tractor 1 cannot be moved unless the wheel stopper 4 is stored in the storage part 5, so that even if the driver forgets to remove the wheel stopper 4 by mistake, the wheel stopper can be easily removed. It can be seen that it is still attached. <Seventh Embodiment> Next, a seventh embodiment of the present invention will be described.

FIGS. 10 and 11 are views for explaining the seventh embodiment of the present invention. Also in this example, the configuration of the towing tractor 1 used is the configuration shown in FIG. 1 described above, and the wheel stopper 4 used in this example is also stored in the storage portion 5, and the storage portion 5 is the front wheel of the towing tractor 1. 6 and rear wheel 7
It is provided between them. This example also describes an example of a wheel stopper lock system (wheel stopper lock prevention device) as in the above-described sixth embodiment. Hereinafter, a specific description will be given.

In the figure, a lock prevention pin 40 and an electromagnetic lock 44 as electromagnetic means function as lock prevention means, and the lock prevention pin 40 is driven right and left by a driving force applied from the electromagnetic lock 44. A switch 45 is provided at the lower right of the back surface of the storage unit 5, and the switch 45 is turned on when the wheel stopper 4 is stored in the storage unit 5. The ON / OFF signal of the switch 45 is output to a drive circuit 46 of the lock prevention pin 40, and the drive circuit 46 creates a drive signal for driving the electromagnetic lock 44. Then, the drive circuit 46 outputs the generated drive signal to the electromagnetic lock 44 to drive the electromagnetic lock 44. For example, when the switch 45 is turned on, the drive circuit 46 drives the lock prevention pin 40 in a pulling direction (to the left) to release the lock of the lock pin 10. On the other hand, when the switch 45 is turned off, the driving circuit 46
Is driven in the locking direction (right direction) to lock the lock pin 10.
Move to a position to prevent the descent.

Therefore, for example, the towing tractor 1
When the vehicle is parked and the wheel stopper 4 is taken out from the wheel stopper 4 in the storage portion 5 in the state shown in FIG. 11, the switch 45 is turned off, so that the drive circuit 46
Drive 0 to the locked position. Therefore, the storage portion 5 is in the state shown in FIG. 10, and the lock pin 10 cannot be lowered by the lock prevention pin 40 and is locked. still,
The wheel stopper 4 taken out of the storage part 5 is attached to the front wheel 6 or the rear wheel 7 and used.

On the other hand, when moving the towing tractor 1, the wheel stopper 4 is stored in the storage section 5. At this time, the switch 45 is stored by storing the wheel stopper 4 in the storage section 5.
Is turned on, a drive signal is output from the drive circuit 46 in a direction to unlock the lock prevention pin 40, and the lock prevention pin 40 is in the state of FIG. Therefore, the lock pin 1
0 can be lowered, and the lock on the lock pin 10 is released.

Therefore, the lock prevention pin 4
In order to release the lock of the lock pin 10 by driving the lock 0, it is necessary to always store the wheel stopper 4 in the storage part 5, and if the wheel stopper 4 is not stored in the storage part 5, the lock pin 10 locks cannot be unlocked. That is, the parking brake cannot be released by operating the brake lever 8. From this, for example, even if an attempt is made to move the towing tractor 1 with the wheel stopper 4 attached to the tire by mistake, the parking brake cannot be released and the wheel stopper 4 is not removed.

As described above, according to the present embodiment, the towing tractor 1 cannot be moved unless the wheel stopper 4 is stored in the storage part 5, so that even if the driver forgets to remove the wheel stopper 4 by mistake, the wheel stopper can be easily removed. It can be seen that it is still attached.

In the above-described seven embodiments, the example of the towing tractor 1 has been described, but the present invention can be similarly applied to other vehicles. Further, the wheel stopper lock device is not limited to the structure provided on the block 4b side, but may be provided on the block 4a side. Further, the structure of the wheel stopper is not limited to a structure in which the blocks 4a and 4b are connected by a connecting member, and may be another structure. For example, a structure in which both blocks are connected by integral molding, a structure in which both blocks are provided independently, or a structure in which only one of the blocks is provided may be used. . In this case, a lock device is provided for each block. Also, the shape of the block may be another shape that can be stopped by a wheel.

Further, the structure of the wheel stopper lock device is not limited to the structure provided on the right side surface in the drawing of the storage portion, but may be provided at another position, for example, the left side surface, the upper surface, the back surface, or the lower surface in the drawing. May be provided.

Also, the links, wires,
The lock member and the parking lever may be linked with each other using a structure other than the pinion rack gear, the drive circuit, and the like. For example, one using a belt or the like can be used.

Further, the operation of the parking brake may be used for a pedal system other than the lever system, for example.

[0100]

As described above, according to the present invention,
Since the wheel chock is always locked during vehicle operation, the wheel chock does not drop from the storage section. Further, it is possible to prevent forgetting to apply the parking brake when parking the vehicle.

Further, according to the present invention, the parking brake cannot be released unless the wheel stopper is stored in the storage part, so that the vehicle cannot be driven, and therefore, it is possible to prevent the vehicle from starting with the wheel stopper engaged.

[Brief description of the drawings]

FIG. 1 is an external view of a towing tractor employing a wheel stopper lock device according to an embodiment.

FIG. 2 is a diagram illustrating a configuration of a wheel stopper lock device according to a first embodiment, and is a state diagram when a wheel stopper is in an unlocked state.

FIG. 3 is a diagram illustrating a configuration of a wheel stopper lock device according to a first embodiment, and is a state diagram when a wheel stopper is in a locked state.

FIG. 4A is a diagram illustrating a configuration of a wheel stopper lock device according to a second embodiment, and is a state diagram when a wheel stopper is in an unlocked state. (B) is a figure explaining the composition of the wheel stopper lock device by a 2nd embodiment, and is a state figure at the time of wheel stopper being in a lock state.

FIG. 5A is a diagram illustrating a configuration of a wheel stopper lock device according to a third embodiment, and is a state diagram when a wheel stopper is in an unlocked state. (B) is a figure explaining the composition of the wheel stopper lock device by a 3rd embodiment, and is a state figure at the time of wheel stopper being in a lock state.

FIG. 6 is a diagram illustrating a configuration of a wheel stopper lock device according to a fourth embodiment.

FIG. 7 is a diagram illustrating a configuration of a wheel stopper lock device according to a fifth embodiment.

FIG. 8 is a diagram illustrating a configuration of a wheel stopper lock system according to a sixth embodiment, and is a state diagram when a lock pin is in a lock preventing state.

FIG. 9 is a diagram illustrating a configuration of a wheel stopper lock system according to a sixth embodiment, and is a state diagram in a state where lock inhibition of a lock pin is released.

FIG. 10 is a diagram illustrating a configuration of a wheel stopper lock system according to a seventh embodiment, and is a state diagram when a lock pin is in a lock preventing state.

FIG. 11 is a diagram illustrating a configuration of a wheel stopper lock system according to a seventh embodiment, and is a state diagram in a state where lock inhibition of a lock pin is released.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towing tractor 2 Driver's seat 3 Handle 4 Wheel stop 4a, 4b Block 4b 'Hole 4b "Groove 4c Connecting member 5 Storage part 6 Front wheel 7 Rear wheel 8 Brake lever 8a Handle 8b Joint plate 8b', 8c 'Link pin 9 Link Plate 10, 12 Lock pin 10b Tip 10b 'Link pin 10c Lever 11 Pin guide 15, 16 Wire 17a, 17b, 18a, 18b Wire fixing bracket 19, 20, 21 Pulley 23 U-shaped lever 25 Rack gear 26 Pinion gear 29 Connection Plate 29a Upper end 29b Lower end 30 Lock lever 31, 32 Rod 33 Rotating lever 33a, 33b, 30 'Joint pin 35 Micro switch 36 Drive circuit 37 Electromagnetic lock 38 Lock pin (solenoid) 40 Lock prevention pin 41 Spring member 42 Pin Id 43 stopper 44 electromagnetic lock 45 switch 46 driving circuit

Claims (14)

[Claims] 1. A brake lever for operating a parking brake of a vehicle; a wheel stopper stored in a storage portion; and a wheel stopper when the brake lever is moved to a position of a brake release state in conjunction with operation of the brake lever. And a wheel stopper lock device for unlocking the wheel stopper when the brake lever is moved to a position where the brake is driven. 2. The wheel stopper lock means includes: a link mechanism having one end attached to the brake lever; a lock member attached to the other end of the link mechanism, which fits into a hole provided in the wheel stopper. The lock device according to claim 1, further comprising: 3. When the brake lever is moved to a position where the brake is released, the link mechanism operates to fit the lock member into the hole of the wheel stopper to lock the wheel stopper and to release the brake lever. 3. The wheel stopper lock device according to claim 2, wherein the link mechanism operates to release the engagement of the lock member and release the lock of the wheel stopper when moving to the position of the brake driving state. 4. The first and second wheel stopper lock means, wherein one end is attached to the brake lever.
2. The wheel stopper lock device according to claim 1, comprising: two wires; and a lock member to which the other ends of the two wires are attached, respectively, and which are fitted into holes provided in the wheel stopper. . 5. When the brake lever is moved to a position where the brake is released, the second wire moves the lock member, and the lock member is fitted into the hole of the wheel stopper to release the wheel stopper. When locking and moving the brake lever to the position of the brake driving state, the first wire moves the lock member, releases the engagement of the lock member, and releases the lock of the wheel stopper. The wheel stopper lock device according to claim 4, characterized in that: 6. The wheel stop lock means, a lever having one end attached to the brake lever, a pinion / rack gear provided at the other end of the lever and operated in conjunction with driving of the lever, and the pinion. The lock device according to claim 1, further comprising: a lock member attached to a tip of a moving portion of the rack gear. 7. When the brake lever is moved to a position where the brake is released, the lever is driven, the pinion rack gear is operated, and the lock pin is fitted into the hole of the wheel stopper to thereby stop the wheel stopper. When the brake lever is moved to the position of the brake driving state, the lever is driven in the reverse direction, the pinion rack gear is operated, the engagement of the lock pin is released, and the lock of the wheel stopper is locked. The wheel stop lock device according to claim 6, wherein the lock is released. 8. The wheel stopper lock means includes: a first rod rotatably attached at one end to the brake lever; and a rotation lever rotatably attached to the other end of the first rod. A second rod having one end rotatably attached to the rotation lever; a rod mechanism rotatably provided at the other end of the second rod, and rotatably driven by the rod mechanism. The lock device according to claim 1, further comprising: a lock lever fitted into a hole provided in the wheel stopper. 9. When the brake lever is moved to a position where the brake is released, the first rod pivots the rotation lever to a first position and drives the second rod.
When the lock lever is fitted in the hole of the wheel stopper to lock the wheel stopper and the brake lever is moved to the position of the brake driving state, the first rod moves the rotary lever to the second position. The wheel stopper lock device according to claim 8, wherein the wheel stopper is rotated to drive the second rod to release the engagement of the lock lever to release the lock of the wheel stopper. 10. The wheel stop lock means, a changeover switch switched by operating the brake lever, a drive signal output means for outputting a drive signal in accordance with an output of the changeover switch, and an output from the drive signal output means. 2. A wheel stopper lock device according to claim 1, further comprising: an electromagnetic lock that fits a lock pin into a hole provided in the wheel stopper according to a drive signal. 11. When the brake lever is moved to a position where the brake is released, the changeover switch is turned on,
A drive signal is output from the drive signal output means, the electromagnetic lock is driven, the lock pin is fitted into the hole of the wheel stopper, the wheel stopper is locked, and the brake lever is moved to a position in a brake driving state. When moving, the output of the drive signal from the drive signal output means is stopped, the changeover switch is turned off, the drive signal outputs a drive signal from the output means, and the electromagnetic lock is driven to drive the lock pin. The wheel chock lock device according to claim 10, wherein the wheel chock is unlocked by removing the wheel chock from the hole. 12. A brake lever for operating a parking brake of a vehicle, a wheel stopper housed in a storage portion, and a wheel stopper when the brake lever is moved to a position of a brake release state in conjunction with operation of the brake lever. Lock means for locking the wheel stop and unlocking the wheel stop when moved to the position of the brake driving state, and blocking means for preventing operation by the lock means when the wheel stop is not stored in the storage portion. And a wheel stop lock system comprising: 13. The urging means according to claim 1, wherein said stopping means comprises an operation preventing pin, and a spring member for applying an urging force to said operation preventing pin, wherein said urging force of said spring member is provided when said wheel stopper is not stored in said storage portion. 2. The operation preventing pin prevents operation of the lock means by means of the operation preventing pin.
3. The wheel stop lock system according to 2. 14. The blocking means comprises an operation blocking pin and electromagnetic means for driving the operation blocking pin. When the wheel stopper is not stored in the storage section, the operation blocking pin is controlled by the electromagnetic means. 13. The wheel stop lock system according to claim 12, wherein the operation by the locking means is prevented.