JPH018451Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an automatic guided vehicle equipped with a roller-type transfer device for loading cargo.

Prior Art In general, a roller-type transfer device in an automatic guided vehicle can be moved between a load restraining position and a non-retaining position at the loading/unloading end (on one side or both sides) in order to prevent the load from shifting or falling during transportation. It is equipped with a rotating or vertically moving stopper mechanism. Therefore, in order to avoid interference with the stopper mechanism, the roller located at the loading/unloading end of the transfer device, that is, the outermost roller, must be placed inside the loading/unloading end. However, in order to smoothly transfer loads at the station, that is, to receive and deliver loads, it is effective to minimize the distance between the outermost roller and the roller on the station side.
Due to the above-mentioned restrictions, the distance between the rollers inevitably becomes large, which poses a problem in that the smoothness of receiving and delivering is impaired.

Purpose of the invention The purpose of the present invention is to provide an automatic guided vehicle that can smoothly receive and deliver cargo by eliminating the above-mentioned conventional drawbacks.

Structure of the invention The present invention places the roller located at the loading/unloading end of a roller-type transfer device in an automatic guided vehicle at a loading/unloading position at the same height as other rollers and at a load restraining position higher than the other rollers. The rollers are movable and can be used not only for transferring loads, but also as stoppers for loads.

Embodiment 1 Embodiment 1 of the present invention will be specifically described below with reference to FIGS. 1 to 4. In the figure, reference numeral 1 denotes a roller-type transfer device in an automatic guided vehicle, and the transfer device 1 includes a large number of rollers 2 in two rows, front and rear.
is a recess 5 formed in the cargo frame 5 on the vehicle body 4
They are arranged parallel to each other and rotatably supported by a shaft such that their upper surfaces are slightly higher than the upper surface of the frame.

Of the rollers 2, the two rollers 3 on the left and right, which are located at the outermost side at the loading/unloading end, function for loading and unloading cargo and for preventing the cargo from falling.
It is attached to the loading platform frame 5 so that it can move up and down. That is, each dual-purpose roller 3 is connected to the loading platform frame 5.
It is arranged as close to the outside as possible within a range that does not protrude from the side surface of the carrier, and both ends are rotatably supported by roller shafts 6, and the roller shafts 6 are arranged in guide holes formed in the platform frame 5. 7 so as to be movable up and down, and is prevented from rotating by the flat surface portion, and is supported by a pair of front and rear lift devices 8 housed within the platform frame 5. As shown in FIGS. 3 and 4, each lift device 8 includes a linear electromagnetic solenoid or fluid cylinder 9 (hereinafter simply referred to as a cylinder), a lift arm 10 that supports the roller shaft 6, and a cylinder 9. The cylinder 9 is connected to a bracket 14 fixed to the loading platform frame 5 by a pin 15, and the relay link 13 is connected to a bracket 14 fixed to the loading platform frame 5 by a pin 15. It is rotatably supported by a support shaft 17 on a bracket 16 fixed to the platform frame 5. The lift device 8 configured as described above has the dual-purpose roller 3 placed at a loading/unloading position (the solid line position in FIG. 4) at the same height as the aforementioned roller 2 exclusively for transfer, and from the roller 2 exclusively for transferring. It is also designed to be able to move up and down to a high load restraining position (the position shown by the imaginary line in FIG. 4). Note that the loading platform frame 5 is opened to avoid interference with the upper end of the lift arm 10.

This embodiment is configured as described above,
Therefore, when receiving or delivering the cargo W to the ground rollers 18 of the station, the dual-purpose roller 3 on the non-loading/unloading side is held in the load restraining position, but the dual-purpose roller 3 on the loading/unloading side is held in the load restraining position. 8 is lowered to the loading/unloading position by the contraction operation of the cylinder 9, and acts as a loading/unloading position, and the loading/unloading W is smoothly received or handed over. Furthermore, when the load W is loaded onto the transfer device 1, the dual-purpose roller 3 is raised to the load restraining position by the extension operation of the cylinder 9 of the lift device 8, and acts as a stopper to prevent the load from falling. It can be prevented.

Example 2 Next, Example 2 will be explained based on FIGS. 5 to 7. In this embodiment, the transfer roller 2 and the dual-purpose roller 3 are each driven by a chain mechanism 19 (the drive device is not shown), and the dual-purpose roller 3 and the roller shaft 6 are integrated. The dual-purpose roller 3 is rotatably supported by a bell crank 21 that is pivotally supported by a bracket 20, and is moved by a swinging lift type between a load/unload position and a load restraint position as shown in FIG. . Incidentally, fluctuations in the tension of the chain 19a due to the vertical displacement of the dual-purpose roller 3 are adjusted by a tension pulley 22. Therefore, according to this embodiment, by moving the dual-purpose roller 3 up and down in the same manner as in the previous embodiment, it can be used for transferring loads and preventing the load from falling. Since it is a driving roller, it is possible to receive and deliver packages more smoothly.

Furthermore, in this embodiment, as shown in the figure, a free roller 23 with a smaller diameter is installed between the dual-purpose roller 3 located on the outermost side and the dedicated roller 2 adjacent thereto, and this is effective when receiving packages. It is. That is, when the ground roller 18 on the station side is inclined or when the ground roller 18 is located at a higher position than the rollers 2 and 3 on the conveyance vehicle side, the tip of the load W is attached to the rollers 2 and 3 as shown in the figure.
However, the free roller 23 described above can solve this problem and facilitate the receiving of the cargo W.

Note that the means for raising and lowering the dual-purpose roller 3 is not limited to that shown in the drawings, and can be modified as appropriate.

Effects of the Invention As detailed above, according to the present invention, in an automatic guided vehicle equipped with a roller-type transfer device, the outermost roller at the loading/unloading end is used not only for loading and unloading, but also for loading and unloading. It can be used as a stopper for
By omitting the conventional stopper mechanism, it is possible to reduce the number of parts and costs, and the rollers can be arranged over the entire width of the vehicle, making it possible to smoothly receive and deliver luggage.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the automatic guided vehicle, FIG. 2 is a plan view, FIG. 3 is a perspective view showing the main parts, and FIG. 4 is a sectional view showing the operating mode. , FIG. 5 is a plan view showing another embodiment, FIG. 6 is a view taken along the - line in FIG. 5, and FIG. 7 is a view taken along the - line in FIG. 5. 1... Transfer device, 2... Dedicated roller, 3...
Dual purpose roller, 5... Loading platform frame, 8... Lift device, 9... Cylinder, 10... Lift arm.

Claims (1)

[Scope of utility model registration request] In an automatic guided vehicle equipped with a roller-type transfer device for loading, the roller located at the loading/unloading end of the rollers making up the loading/unloading device is placed at the same height as the other rollers. An automatic guided vehicle characterized by being able to move to a load restraining position higher than other rollers.