JPH0232182B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a positioning device for placing a loaded object supported on an automatic guided vehicle at a predetermined position with respect to a floor surface.

[Technical background of the invention and its problems]

Generally, in an automatic guided vehicle equipped with a loading object such as a transfer platform or transfer device, when stopping, the loading object is required to be placed in a predetermined position relative to the floor, and the automatic stopping of the automatic guided vehicle itself is required. If the resulting stopping accuracy does not reach the required accuracy, it is necessary to correct the position. Therefore, such a conveyance vehicle is provided with a positioning device for position correction.

FIGS. 1 and 2 show a carrier 1 equipped with a positioning device for correcting the position.

A plurality of hydraulic jacks (expanding and retracting devices) 3 are attached to the vehicle body 2 of the transport vehicle 1, with the upper ends of casings 4 being fixed. Each of these liquid pressure jacks 3
, a plunger 6 connected to the piston 5 protrudes from the casing 4 and extends downward, and a stop positioning joint member 8 having a conical concave surface 7 expanding downward is attached to the lower end of the plunger 6. It is being Further, in the hydraulic jack 3, a return spring 9 is interposed within the casing 4, and the plunger 6 is always urged upward.

In addition, a transfer table 10 (loading object) is provided on the upper surface of the vehicle body 2.
is fixed to the vehicle body 2, and wheels 11 are further supported on the sides of the vehicle body 2.

On the other hand, a plurality of stop positioning guide members 13 are provided on the floor surface 12 on which the transport vehicle 1 runs, projecting upward. This stop positioning guide member 13 has a conical convex surface 14 that expands downward so that it can engage with the stop positioning joint member 8 .

Next, the operation of the positioning device when the automatic stop position of the guided vehicle 1 deviates from a predetermined point by E in the moving direction of the guided vehicle 1 will be explained.

In this case, the hydraulic jack 3 is actuated and the plunger 6 is extended downward against the return spring 9. Accordingly, the stop positioning joint member 8 attached to the lower side of the plunger 6 is lowered, and a part of the stop positioning joint member 8 is engaged with the stop positioning guide member 13 provided on the floor surface 12. moreover,
When the plunger 6 is extended downward, the conical concave surface 7 of the stop positioning joint member 8 and the conical convex surface 14 of the stop positioning guide member 13 are completely and tightly engaged, that is, in the direction of arrow A in FIG. The conveyance vehicle 1 is moved, and finally the conical concave surface 7 of the stop positioning joint member 8 and the conical convex surface 14 of the stop positioning guide member 13 are completely and tightly engaged. Thus, the loading platform 10 of the transport vehicle 1 is positioned at a predetermined position with respect to the floor surface 12, and loading and unloading of cargo is performed at this position.

In addition, when loading and unloading of cargo is completed,
The plunger 6 is retracted by the hydraulic jack 3, and the stop positioning joint member 8 attached to the lower side of the plunger 6 is housed in the vehicle body 2.

On the other hand, if the automatic stop position of the guided vehicle 1 is deviated in the direction perpendicular to the moving direction of the guided vehicle 1, the plunger 6 is moved until the wheels 11 are separated from the floor 12, as shown in FIG. stretched downward.
Then, due to the weight of the transport vehicle 1, the conical concave surface 7 of the stop positioning joint member 8 and the conical convex surface 14 of the stop positioning guide member 13 are completely and tightly engaged.

Therefore, the hydraulic jack 3 used in such a positioning device needs to have a capacity sufficient to lift the entire transport vehicle 1. Therefore, there was a problem that the positioning device itself became large. In addition, in such a positioning device, the wheels 11 slip sideways when correcting the position, which causes the wheels 11 and the floor 12 to wear out.

[Purpose of the invention]

The present invention has been made in order to solve this problem, and an object of the present invention is to provide a positioning device that is small in size and does not cause wear on the wheels or the floor surface.

[Summary of the invention]

The present invention provides a telescopic device that is vertically expandable and retractable on the body of a transport vehicle, a stop positioning member provided below the telescoping device, and a stop positioning guide member provided on the floor surface on which the transport vehicle runs. a positioning device for positioning a loaded object supported on the vehicle body at a predetermined position on the floor surface by engaging the stop positioning joint member and the stop positioning guide member; The loading body and the expansion/contraction device are supported by a device, and are attached to the vehicle body so as to be movable in the horizontal direction, and a joining member for the vehicle body is provided on the loading body, and the joining member for the vehicle body is provided on the vehicle body. A guide member for the loaded object is provided which engages with the loaded object and places the loaded object at a predetermined position on the vehicle body.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. Note that the same parts as in the conventional one are given the same reference numerals, and the explanation thereof will be omitted.

3 and 4 show a transport vehicle 1 equipped with a positioning device according to a first embodiment of the present invention.

A plurality of transfer table guide members 15 are provided on the upper surface of the vehicle body 2 of the transport vehicle 1. This transfer table guide member 15 has a conical concave surface 16 that widens upward. Further, an opening 17 is provided at the bottom of the guide member 15 for the transfer table.

In addition, a transfer table (loading table) 10 is provided independently of the vehicle body 2.
is provided. A plurality of vehicle body joining members 18 are provided on the lower surface of the transfer table 10. This joining member 18 for the vehicle body has a conical convex surface 19 that expands upward so as to be able to engage with the guide member 15 for the transfer table.

Further, a hydraulic jack (expansion/contraction device) 3 is provided inside the vehicle body 2 and independent of the vehicle body 2 .
In this hydraulic jack 3, a plunger 6 connected to the piston 5 protrudes from the casing 4 and extends upward, and the plunger 6 is inserted into the opening 17 of the guide member 15 for the transfer table. , its upper end is fixed to the top of the vehicle body joining member 18.

Further, a stop positioning joint member 8 similar to that shown in FIG. 1 is provided on the lower side of the casing 4 of the hydraulic jack 3.

Note that the opening 17 of the guide member 15 for the transfer table
Regarding the relationship between the plunger 6 and the plunger 6 inserted therein, the difference between the radius of the opening 17 of the guide member 15 for the transfer table and the shaft radius of the plunger 6 is set to be larger than the automatic stop error of the transport vehicle 1. There is.

Next, the operation of the positioning device of the first embodiment when the automatic stop position of the guided vehicle 1 is shifted by E in the moving direction of the guided vehicle 1 from a predetermined point will be explained.

In this case, the hydraulic jack 3 is activated and the casing 4 is lowered against the return spring 9. Accordingly, the stop positioning joint member 8 attached to the lower side of the casing 4 is lowered, and a part of the stop positioning joint member 8 is engaged with the stop positioning guide member 13 provided on the floor surface 12. When the engagement is made, the plunger 6 is pushed upward against the casing 4, as shown in FIG.
Joint member 18 for vehicle body and guide member 15 for moving table
The engagement with is released. When this engagement is released, the plunger 6 can be moved in the horizontal direction within the opening 17 of the guide member 15 for the vehicle body, and due to the weight of the hydraulic jack 3 and the transfer table 10. The stop positioning joining member 8 and the stop positioning guide member 13 are completely and tightly engaged. As a result, the transfer table 10 of the transport vehicle 1 is positioned at a predetermined position with respect to the floor surface 2. Further, when loading and unloading of cargo is completed, the hydraulic jack 3 is operated, and the stop positioning joint member 8 attached to the lower side of the casing 4 is housed within the vehicle body 2. At this time, due to the weight of the hydraulic jack 3 and the transfer table 10, the joint member 18 for the vehicle body and the guide member 15 for the transfer table are tightly engaged, and the transfer table 10 is attached to the vehicle body 2.
is positioned at a predetermined position above.

The same applies when the automatic stop position of the guided vehicle 1 deviates in a direction perpendicular to the moving direction of the guided vehicle 1.

A positioning device having such a configuration and operation provides the following effects.

That is, when correcting the position of the transfer table 10, it is only necessary to lift the transfer table 10, so it is possible to downsize the hydraulic jack 3, and speed up the work and save energy.

Moreover, since the transport vehicle 1 itself is not moved when adjusting the position of the transfer table 10, the wheels 11 do not slip sideways. Therefore, wear of the wheels 11 and the floor surface 12 due to position correction can be prevented. 5 and 6 show a transport vehicle 1 with a second embodiment.

In this second embodiment, the casing 4 of the hydraulic jack 3 is directly fixed to the lower surface of a transfer platform (loading body) provided independently of the vehicle body 2.
Further, a joint member 18 for a vehicle body similar to that of the first embodiment is provided on the lower surface of the transfer table 10 at a location away from the fixing position of the casing 4, while on the upper surface of the vehicle body 2 opposite thereto. Guide member 15 for transfer table
is provided. Note that the other parts are similar to the conventional positioning device (FIGS. 1 and 2).

In this second embodiment as well, the same effects as in the first embodiment can be obtained.

In addition, in the first and second embodiments, an example in which the hydraulic jack 3 is used as the telescoping device has been described, but the present invention is not limited to such an embodiment, and an electric cylinder or an electric cylinder or the like is used as the telescoping device. A device having a function equivalent to this may also be used. In addition, the stop positioning joint member 8
The shape may be a conical convex surface, while the stop positioning guide member 13 that engages with this may have a conical concave shape. The same applies to the joining member 18 for the vehicle body and the guide member 15 for the transfer table.

〔Effect of the invention〕

As explained above, the present invention provides a telescopic device that is vertically expandable and retractable on the vehicle body of a transport vehicle, a stop positioning member is provided below the telescopic device, and a stop positioning member is provided on the lower side of the telescopic device, and a A positioning device that positions a loaded object supported on the vehicle body at a predetermined position on the floor surface by providing a stop positioning guide member on the vehicle body and engaging the stop positioning joint member and the stop positioning guide member,
The loaded body is supported by the telescopic device, and the loaded body and the telescopic device are attached to the vehicle body so as to be movable in the horizontal direction, and a joining member for the vehicle body is provided on the loaded body, and a joining member for the vehicle body is provided on the loaded body. Since the vehicle body guide member is provided which engages with the vehicle body joint member and places the loaded object at a predetermined position on the vehicle body, there is no need to lift the transport vehicle itself, so the positioning device itself can be miniaturized. In addition, it can contribute to speeding up position correction work and saving energy. Further, it is possible to prevent wear of the wheels and the floor surface when correcting the position.

[Brief explanation of drawings]

1 and 2 are schematic side views of a carrier equipped with a conventional positioning device, and FIGS. 3 and 4 are schematic side views of a carrier equipped with a first embodiment of a positioning device according to the present invention. 5 and 6 are schematic side views of a transport vehicle equipped with a second embodiment of the positioning device according to the present invention. DESCRIPTION OF SYMBOLS 1... Transport vehicle, 2... Vehicle body, 3... Liquid pressure jack (expansion device), 8... Stop positioning joining member,
10... Transfer table (loading object), 11... Wheels, 12
... Floor surface, 13 ... Stop positioning guide member, 15
... Guide member for transfer table (guide member for load object),
18... Joining member for vehicle body.

Claims (1)

[Claims] 1. A telescopic device that is vertically expandable and retractable is provided on the body of the transport vehicle, a stop positioning joint member is provided below the telescoping device, and a stop positioning guide member is further provided on the floor surface on which the transport vehicle runs, In a positioning device that positions a loaded object supported on the vehicle body at a predetermined position on the floor surface by engaging the stop positioning joint member and the stop positioning guide member, the loading object is moved by the telescopic device. At the same time, the loading body and the expansion/contraction device are attached to the vehicle body so as to be movable in the horizontal direction, and a connecting member for the vehicle body is provided on the loading body, and the connecting member for the vehicle body is connected to the vehicle body. A positioning device characterized in that a guide member for a loaded object is provided for placing the loaded object at a predetermined position on the vehicle body.