JP2000127957A - Truck conveyance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with strict positioning and dispense with fitting for positioning and an electric recognition means by improving a connection means of a truck and a driving vehicle. SOLUTION: This is a truck conveyance device in which a driving vehicle 2 slips under a truck to connect it with the truck for conveyance. A locking pin is provided in a lower part of the truck, and a locking plate 12 capable of rising and lowering is provided in the driving vehicle 2. A pin receive hole 13 which receives the locking pin and has such area that can absorb positioning error of the truck and a pin locking hole 14 which is continuously brought into contact with both front and rear ends of the pin receive hole 13 to lock the locking pin are formed on the locking plate 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley transportation device, and more particularly to a trolley transportation device for pulling a hand-held trolley by a drive vehicle sunk underneath to transport a predetermined route unmanned. is there.

[0002]

2. Description of the Related Art As shown in FIG. 5, a driving vehicle 2 is inserted under a hand-operated type bogie 1 and connected to the bogie 1 to convey the bogie 1 along a predetermined route 6 unmanned. Transport devices are widely used in hospitals, offices, and the like. As shown in FIG. 5, this type of conventional truck transport device is provided with a locking hole 27 in a lower frame 26 of the truck 1 and two locking pins 25 which can be moved up and down on an upper portion of the driving vehicle 2. It was done. After the driving vehicle 2 is sunk under the carriage 1 and stopped, the locking pin 25 is raised to be locked in a locking hole 27 formed in a lower frame 26 of the carriage 1, and the driving vehicle 2
Is transported along the traveling route 6 so that the bogie 1
Is towed by the driving vehicle 2 and is carried unmanned.

[0003]

As described above, the conventional connecting means between the driving wheel 2 and the bogie 1 includes the locking pin 25 and the locking hole 2.
7, it is necessary that the locking pin 25 and the locking hole 27 match exactly. Lock pin 25
The inner diameter of the locking hole 27 is larger than the outer diameter of the locking hole 27 to make it easier to fit. However, if the inner diameter of the locking hole 27 is too large, the gap between the locking pin 25 and the locking hole 27 becomes too large. There is a problem that the bogie 1 rattles during towing. In addition, since the carriage 1 itself has a traveling error of about ± 10 mm, it is very difficult to position the carriage 1 after the carriage 1 enters.

Conventionally, a positioning bracket or the like is attached to the traveling path 6, or a recognition mark is provided on the traveling path to electrically detect the mark (see Japanese Patent Application Laid-Open No. 9-5737). It is necessary to perform positioning, and there has been a problem that positioning means is complicated.

The present invention has been made in view of such a problem, and an object of the present invention is to improve the connecting means between a bogie and a driving car so that precise positioning is not required. Another object of the present invention is to provide a carriage transporting device that does not require a metal fitting for positioning and an electric recognition means.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention according to claim 1 is directed to a bogie transport device in which a drive vehicle is sunk under a bogie and connected to and transported with the bogie. A locking pin is provided at one of the lower part of the bogie and the upper part of the bogie, and the relative movement of one of the lower part of the bogie and the upper part of the bogie relative to the locking pin is made closer to or away from the locking pin. A pin receiving hole having a width capable of receiving the locking pin and absorbing a positioning error of the bogie, and being connected to front and rear ends of the pin receiving hole. A pin locking hole for locking the locking pin is formed.

The invention according to claim 2 is characterized in that the pin receiving hole is a substantially circular hole. According to a third aspect of the present invention, the locking pin is attached to the entrance of the pin locking hole so that the locking pin rotates in a direction to enter the pin locking hole and does not rotate in the opposite direction. A spring swing type stop key provided is provided. The invention according to claim 4 is characterized in that, when the drive vehicle is separated from the bogie, the locking plate is lowered to release the locking between the locking plate and the locking pin.

[0008] The driving wheel is sunk under the carriage and stopped, and the locking plate is moved in a direction approaching the locking pin with the locking plate positioned below or above the locking pin. As a result, the locking pin enters the receiving hole of the locking plate. When the driving wheel is slightly moved in this state, the locking pin is guided while sliding in contact with the inner peripheral edge of the pin receiving hole regardless of the position in the pin receiving hole. Fits in the hole.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bogie transport drive vehicle according to an embodiment of the present invention. The same members or those having the same functions as those in FIGS. 5 and 6 are denoted by the same reference numerals. In FIG. 1, reference numeral 1 denotes a truck, and 2 denotes a driving vehicle that sneaks under the truck 1 and conveys it. The cart 1 is provided with wheels 4 at a lower portion of a loading section 3 for loading luggage, and has two locking pins 5 protruding from the bottom surface. The driving wheel 2 has a structure in which wheels 8 are provided at a lower portion of a case 7 and a coupling mechanism 10 is provided at an upper portion of the case 7. As shown in FIGS. 3 and 4, the connecting mechanism 10 includes a locking plate 12 attached to an upper end of a lifting rod 11. The locking plate 12 has a structure in which a substantially circular pin receiving hole 13 is formed at the center, and pin locking holes 14 are connected to both ends of the pin receiving hole 13 at the front and rear ends.

The pin locking hole 14 has an inner diameter enough to fit the locking pin 5, and the pin receiving hole 13 is set to have a size capable of absorbing a positioning error of the carriage 2. A spring swing type locking key 15 for preventing the locking pin 5 from coming off is provided at the entrance of the pin locking hole 14. That is, the locking key 15 is rotatably supported by the shaft 16, is urged clockwise in FIG. 3 by the spring 17, and is stopped clockwise by the stopper 18.

A connecting member 19 is attached to the lower end of the lifting rod 11, and a rack 20 extending downward is attached to the connecting member 19. The pinion 21 meshing with the rack 20 is rotated by a driving device 22 including a motor, a speed reduction mechanism, and the like, and the rack 20 is moved up and down to raise and lower the locking plate 12 via the lifting rod 11. .

Next, the operation will be described based on the above configuration. In FIG. 1, the driving vehicle 2 is sunk under the carriage 1 with the locking plate 12 lowered, and the pin receiving hole 13 of the locking plate 12 is positioned below the locking pin 5 of the carriage 1. Stop. That is, the positioning at this time only needs to be within the range of the pin receiving hole 13 for the locking pin 5, and strict positioning is not required. Next, the pinion 21 is rotated by the driving device 22 and the rack 20 is raised, whereby the locking plate 12 is raised. As a result, the locking pin 5 enters the pin receiving hole 13 of the locking plate 12.

When the driving vehicle 2 is slightly moved in this state,
The locking plate 12 also moves, so that the locking pin 5 is finally fitted in the pin locking hole 14 regardless of the position in the pin receiving hole 13. For example, if the locking pin 5 is located near the side of the pin receiving hole 13 and the locking plate 12 moves, the locking pin 5
Is in contact with the arc portion of the inner peripheral edge of the pin receiving hole 13 and is guided while sliding. And the locking pin 5 is the stop key 15
, The locking key 15 rotates counterclockwise (in the direction of the arrow) around the shaft 16 to allow the locking pin 5 to pass therethrough. To the position. Since the rear end of the stop key 15 is locked by the stopper 18 and does not further rotate clockwise, the lock pin 5 fitted in the pin lock hole 14 is prevented by the stop key 15 and escape is prevented. You.

In the above-described embodiment, the shape of the pin receiving hole 13 is substantially circular. This shape is a preferable shape because errors in any directions can be absorbed evenly and positioning directivity is lost. However, the present invention is not limited to this. Further, an example in which the mechanism of the rack 20 and the pinion 21 is used as the means for raising and lowering the locking plate 12 has been described, but the present invention is not limited to this.
For example, a feed screw mechanism, a link mechanism, or any other linear reciprocating mechanism may be used. In the above-described embodiment, the locking pin is provided at the lower part of the bogie and the locking plate is provided at the upper part of the driving vehicle. However, the present invention is not limited to this. A locking pin may be provided on the side.

[0015]

As described in detail above, according to the first aspect of the present invention, a locking pin is provided at one of the lower part of the bogie and the upper part of the bogie facing each other, and the lower part of the bogie and the A locking plate is provided on one of the upper portions so as to be relatively movable in a direction approaching and separating from the locking pin.
A pin receiving hole having a size capable of receiving the locking pin and absorbing a positioning error of the bogie, and a pin locking hole connected to front and rear ends of the pin receiving hole and locking the locking pin are provided. A bogie transport device characterized by being formed. A locking pin is provided at the lower part of the bogie, a driving plate is provided with a locking plate which can be raised and lowered, and the locking plate has a pin receiving hole having a size capable of receiving the locking pin and absorbing a positioning error of the bogie. The pin locking holes are formed at both ends of the pin receiving hole, so if the locking pin is in any position of the pin receiving hole in a wide area, it will be guided to the pin locking hole, and the bogie and the driving wheel Can be connected. Therefore, since the positioning range when the driving vehicle is connected is widened to the range of the pin receiving hole, high-precision positioning means, for example, laying of positioning fittings or electrical detection means, is not required, and the configuration can be simplified and manufactured at low cost.

According to the second aspect of the present invention, since the pin receiving hole is a substantially circular hole, errors in any direction can be uniformly absorbed, and the directivity of positioning can be eliminated. According to the third aspect of the invention, since the spring swing type stop key is provided at the entrance of the pin locking hole, after the locking pin is fitted into the pin locking hole, the locking pin is set to the pin. Escape from the locking hole is prevented, and reliable connection becomes possible. According to the fourth aspect of the invention, when the drive vehicle is separated from the bogie, the locking plate is lowered to release the locking between the locking plate and the locking pin. Unlocking with the locking pin can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a carriage transport device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of a main part of the driving vehicle.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a side view of a conventional carriage transport device.

FIG. 6 is a plan view of FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 cart 2 driving wheel 5 locking pin 12 locking plate 13 pin receiving hole 14 pin locking hole 15 locking key 17 spring 20 rack (elevating means) 21 pinion (elevating means) 22 driving device (elevating means)

Claims (4)

[Claims] 1. A bogie transporting device for transporting a drive vehicle underneath a bogie and connected to the bogie, wherein a locking pin is provided at one of a lower portion of the bogie and an upper portion of the bogie facing each other. A locking plate is provided on one of the lower part of the bogie and the upper part of the bogie so as to be relatively movable in a direction approaching and separating from the locking pin, and the locking plate receives the locking pin. A pin receiving hole having a size capable of absorbing the positioning error of the bogie, and a pin locking hole connected to front and rear ends of the pin receiving hole to lock the locking pin. Dolly transport device characterized. 2. The carriage conveying device according to claim 1, wherein said pin receiving hole is a substantially circular hole. 3. A spring swing is mounted at an entrance of the pin locking hole so as to rotate in a direction in which the locking pin enters the pin locking hole and not to rotate in the opposite direction. The bogie transport device according to claim 1 or 2, further comprising a stop key of a type. 4. When the driving vehicle is separated from the bogie,
The carriage transport device according to any one of claims 1 to 3, wherein the locking plates are lowered to release the locking between the locking plates and the locking pins.