JPH042956Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a vehicle transport system in which a part of a vehicle transport system for moving a vehicle such as a car from the outside without using its own driving force is improved. This invention relates to a lifting device for a wheel stopper of a device.

(Prior Art) When it becomes necessary to move a vehicle that cannot be driven by its own driving force, such as a car with its engine stopped, it is a matter of course that an external force must be used to move the vehicle. In that case, what is normally done is to jack up the vehicle, place it on a truck, and move the vehicle by moving the truck. However, in order to move a vehicle by such means, it is necessary to jack up and jack down the vehicle with respect to the trolley, which is a complicated operation. Furthermore, when the vehicle is jacked up or down, it may become in an unnatural position, which may pose a danger.

(Problem to be solved by the invention) Therefore, a method devised to improve this problem has already been proposed by the present applicant (Utility Application No. 1983-
No. 118071). This proposal has a fork 2 that enters the lower part of the vehicle 1, as shown in FIG.
4 is installed. When in use, one side 4 of the wheel chocks is displaced, the fork 2 is inserted into the lower part of the vehicle 1, and the fork 2 is raised, so that the wheel (the front wheel 5 in the figure) is gripped by the wheel chocks 3 and 4. A part (front part) of the vehicle 1 is raised, and the other wheel (the rear wheel 6 in the figure) is rolled to move it. In addition, 7 in the figure
8 is the main body of the vehicle transport device, 8 is the wheel, and 9 is the operating lever.

In this device, if the fork is provided in a part of a vehicle having driving force, the vehicle to be moved can be easily moved by driving the vehicle. However, with this device, the wheel chock attached to the tip of the fork is supported in a state that only allows rotation relative to the fork, so there is no problem when driving straight, but when turning left or right, the wheel chock is attached to the fork. This causes a problem in that the rotation angle cannot be set large, making it difficult to travel in narrow spaces. Therefore, it is conceivable to install the wheel chocks at a sufficiently high position relative to the forks so that they do not come into contact with the fork even if the wheel chocks rotate, but in this way, the wheel chocks of the vehicle being moved are always Since it is located high up, there is a risk of falling if there is a step in the passageway.

In view of this, the present applicant has devised a device in which the wheel chocks are raised only when turning left or right when moving to avoid contact with forks, and has already applied for a utility model registration. doing. The device of this application has a structure in which an annular cam member is attached to a fork via a plate, a turntable is mounted on the cam member via a roller, and a wheel stopper is attached to the turntable. With this configuration, when the vehicle turns left or right during transportation, the shape of the mountain cam member causes the wheel chock to rise together with the turntable via the roller, so it does not come into contact with the fork, thus preventing any hindrance to driving. This means that it will not occur. The present invention further improves this structure and uses hydraulic pressure to assist in raising the turntable, smoothing the operation and eliminating impact when lowering the turntable.

(Means for Solving the Problems) The present invention provides a vehicle transport device in which left and right wheel chocks are attached to the tips of a fork that enters the lower part of the wheel, and an annular mountain cam member is attached to the fork via a plate. A turntable is placed on the mountain cam member via a roller, the wheel stopper is attached to the turntable, and an axis on which the turntable rotates is formed by a plunger that rises in response to hydraulic pressure. This is a wheel stop lifting device for a vehicle transport device, in which a hydraulic chamber that applies hydraulic pressure to the plunger is connected to a hydraulic power source that applies hydraulic pressure to the fork lifting mechanism.

(Function) With this configuration, by raising the plunger with hydraulic pressure, the raising of the turntable is assisted by the raising force of the plunger in addition to the relationship between the mountain cam member and the roller. This will ensure smooth operation. In addition, when descending, by controlling the discharge of oil from the hydraulic chamber of the plunger, the plunger moves gradually and without causing a shock.
You will be able to do this.

(Example) Next, an example of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 10 denotes the main body of the vehicle transport device, which moves in the left-right direction in the figure. Two forks 2, 2 are made to protrude in parallel from the main body 10, and are adapted to be raised and lowered by a lift drive device (not shown). A plate 11 is attached to the tip of the forks 2, 2 (see Figure 2),
A cylinder 12, which also serves as an axle box, is placed on top of the cylinder 12 with its bottom portion protruding from the hole 13. An O-ring 15 is attached to the lid 14 that covers the top of the cylinder 12.
A plunger 17 whose upper end is fixed to the center of the lower surface of the turntable 16 passes through the cylinder 12 and the lid 14. cylinder 1
2 functions as a hydraulic chamber that applies hydraulic pressure to the plunger 17. For this purpose, a hole 18 is provided at the bottom of the cylinder 12, and a hydraulic power source for applying hydraulic pressure to the elevating mechanism of the fork 2 is connected to the hole 18, which will be explained later.

The lower part of the cylinder 12 is formed into a circular flange part 19, and a concave part 20 and a convex part 2 are formed on the outside thereof.
1 and cam members 22 provided alternately at appropriate intervals.
are integrally provided (see FIGS. 3 and 4). A roller 23 is placed on the top of the mountain cam member 22. The roller 23 is connected to the turntable 16
The shaft 25 of the leg 24 is attached downward from the
It is rotatably attached to the shaft. As a result, the turntable 16 is placed on the mountain cam member 22 via the roller 23 and rotates around the shaft 17. At the lower end of the leg 24,
A roller 26 that rotates in the horizontal direction is attached and is in contact with the outer periphery of the mountain cam member 22. This roller 26 prevents the roller 23 from coming off the mountain cam member 22.

As shown in FIGS. 1 and 6, rod-shaped wheel stops 3 and 4 are attached to both sides of the turntable 16 at appropriate intervals (an interval suitable for receiving the wheels from below). Of the two wheel chocks 3, 4, the inner one is fixed to the turntable 16, and the outer one rotates about the shaft 27 in the direction of the arrow in FIG. It is installed so that it can be used.

As shown in FIGS. 2 and 4, cylinder 1
One end of a pipe 30 is connected to the hole 18 provided at the bottom of the pipe 30, in which a throttle valve 28 and a one-way valve 29 that only allows movement from the right to the left in the figure are connected in parallel. There is. The other end of the pipe 30 is connected to a hydraulic power source 31 for applying hydraulic pressure to a lifting mechanism (not shown) of the fork 2.

This device configured in this way operates as follows. First, the front wheels or rear wheels of the vehicle to be transported are placed on the wheel chocks 3 and 4 provided on the left, right and front sides of the turntable 16. This method may be carried out by jacking up a part of the vehicle, but by rotating the wheel chocks 4, 4 attached to the tips of the forks 2, 2 about the shaft 27 in the direction of the arrow in Fig. 1. , enter the lower part of the vehicle in that state,
After entering the lower part of the vehicle, it may be returned to its original position (parallel to the wheel chocks 3, 3).

Next, when the fork 2, 2 is raised by the lifting mechanism, the wheel to which the wheel chocks 3, 4 are applied (the front wheel 5 in FIG. 7 showing the conventional example) is separated from the road surface. The vehicle will be moved in this condition. When making a left or right turn while moving,
Or when you come to a place where the moving passage is curved,
The main body 10 and the ground wheel of the vehicle form an angle. This displacement then acts as a force to rotate the turntable 16 about the shaft 17 via the wheel chocks 3 and 4, causing the turntable 16 to rotate as shown by the broken line in FIG.

As mentioned above, the turntable 16 has rollers 23
Since it is placed on the upper part of the mountain cam member 22 through the cam member 22, when the uneven position of the mountain cam member 22 as seen from the roller 23 is oriented in a direction that intersects the wheel chocks 3 and 4 with respect to the longitudinal direction of the fork 2. If the wheel chocks 3 and 4 are set to be low and gradually rise when they are displaced from this position with respect to the center of the mountain cam member 22 (with the plunger 17 as the center), when the wheel chocks 3 and 4 are displaced as described above. , the roller 23 rests on the upper part of the convex portion 21 as shown in FIG. 5, and as a result, the turntable 16 rises by the lift amount a as shown in FIG. When the turntable 16 rises, the wheel chocks 3 and 4 also rise, so that they do not come into contact with the forks 2 and 2.

As explained above, the wheel chocks 3 and 4 are raised by the relationship between the mountain cam member 22 and the roller 23 placed on the top of the mountain cam member 22, but in the present invention, the lifting force is A part of it can be assisted by the plunger 17. That is, when it becomes necessary to raise the wheel chocks 3 and 4 during transportation (left turn, right turn, or a curved road), the hydraulic source 31
If this hydraulic pressure is applied to the cylinder 12 artificially or by activating a switch by the displacement of the fork 2 and the wheel chocks 3 and 4, the plunger 17 will rotate around the rotation center of the turntable 16. As the turntable 16 rises, the force pushes up the turntable 16, helping the action of the cam member 22 and the roller 23 to make the turntable rise smoothly. Oil from hydraulic source 31 is supplied through one-way valve 29
, so there is no influence from the throttle valve 28.

Next, when the turntable 16 descends, the oil in the cylinder 12 is returned to the hydraulic pressure source 31 side by the descent of the plunger 17, which receives the weight of the vehicle being moved, the turntable, etc.; Since the valve 29 does not allow flow in that direction, the throttle valve 28 functions to gradually return to the hydraulic pressure source 31 according to a preset throttle amount. Therefore, no shock occurs during descent. The roller 26 provided in contact with the outer periphery of the mountain cam member 22 can reduce the force applied to the plunger 17 even if the left and right balance is slightly off, thereby preventing damage and preventing the roller 23 from slipping off. This will prevent the vehicle from falling.

(Effects of the Invention) Since the present invention is configured as described above, when the vehicle turns while moving, the wheel stop can be smoothly raised by the cooperative action of the cam mechanism and the hydraulic system. As the wheel chock rises, the wheel chock does not hit the fork. When descending, the oil acts as a shock absorber, which helps prevent damage to various parts. Furthermore, since the hydraulic power source is obtained from the one for the fork elevating mechanism, there is no need to provide a separate one, which simplifies both the structure and operation, and is also advantageous in terms of maintenance.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a sectional view of a section taken along the - line in Fig. 1 and a sectional view showing the hydraulic system, and Fig. 3 is a cross section taken along the - line in Fig. 2. Figure 4 is a sectional view showing the operating state of the item in Figure 2, Figure 5 is a sectional view showing the operating status of the item in Figure 3, and Figure 6 is an enlarged view of the item in Figure 1. FIG. 7 is a side view showing the transportation situation of a vehicle as a conventional example. 2...Fork, 3, 4...Wheel chock, 10...
...Body, 11...Plate, 16...Turntable, 17...Plunger, 18...Hole, 20...
... recess, 21 ... protrusion, 22 ... mountain cam member, 2
3...roller, 28...throttle valve, 29...one-way valve, 30...pipe, 31...hydraulic source.

Claims (1)

[Claims for Utility Model Registration] (1) In a vehicle transport device in which left and right wheel chocks are attached to the tips of a fork that enters the lower part of a wheel, an annular mountain cam member is attached to the fork via a plate, A turntable is placed on the cam member via a roller, the wheel stopper is attached to the turntable, and an axis on which the turntable rotates is formed by a plunger that rises in response to hydraulic pressure. A wheel stop lifting device for a vehicle transport device, characterized in that a hydraulic chamber that applies hydraulic pressure is connected to a hydraulic power source that applies hydraulic pressure to the lifting mechanism of the fork. (2) The uneven position of the mountain cam member attached to the fork via the plate is low when the wheel chock faces in a direction that intersects the longitudinal direction of the fork, and the wheel chock does not move from this position to the mountain cam member. A wheel stopper elevating device for a vehicle transport device according to claim 1, wherein the device is set to gradually become higher when displaced with respect to the center. (3) A throttle valve is installed in the middle of the connecting pipe between the hydraulic chamber that applies hydraulic pressure to the plunger and the hydraulic source that applies hydraulic pressure to the lifting mechanism of the fork, and only the flow in the direction from the hydraulic source to the hydraulic chamber is allowed. A wheel stop lifting device for a vehicle transport device according to claim 1, characterized in that a one-way valve is connected in parallel and interposed therebetween.