JPH0723794U - Carrier - Google Patents

Abstract

(57) [Summary] [Purpose] Detecting the position of stacked pallets,
Allow the luggage to be transported with the pallet by the fork of the transport vehicle. A rotating plate 12 is rotatably provided at an insertion port 11 of a pallet 10 and a spring for urging the rotating plate 12 in a clockwise direction is provided. A reflecting plate 13 is attached to an outer surface of the rotating plate 12 while a transport vehicle is used. A photoelectric sensor 4 is provided at the tip of the fork 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transport device, and facilitates detection of a specific position in the height direction of pallets on which loads are stacked.

[0002]

[Prior art]

 An automated guided vehicle may be used to carry the luggage. In this case, the luggage is placed on the pallet, the fork of the automated guided vehicle is inserted into the insertion opening of the pallet, lifted, and then the luggage is transported by the automated guided vehicle.

The pallets are stacked on a loading table or the like in a state where the luggage is loaded, or they are simply stacked without using the loading table and taken out as needed. In other words, a pallet with a specific load must be loaded into a loading platform or the like, or conversely, must be unloaded from a specific location such as a loading platform. For this reason, the automatic guided vehicle can automatically detect the position where a specific load such as a loading platform is loaded.

There are two conventional means for position detection. The first method is to arrange the pallets in a row in the vertical direction and input the height from the floor surface of a specific pallet to the automatic guided vehicle in advance.The height is detected by the encoder attached to the tip of the fork. Then, the tip of the fork is inserted into the intended pallet insertion port and carried out.

As a second means, a photoelectric sensor 4 attached to a tip of a fork 3 detects a reflection plate 2 attached to a luggage 5b by an operator as shown in FIG. 4, and is given in advance. The target height of the pallet 6a is found by detecting the distance from the reflection plate 2 by an encoder. In FIG. 4, 5a and 6a are pallets, and 5b and 6b are packages.

[0008] While any of the means is used, the pallets are arranged in the horizontal direction, but the detection in the horizontal direction is performed by other detecting means not shown.

[0007]

[Problems to be solved by the device]

 However, in the method of detecting the height from the floor surface and specifying the position of the pallet, it is necessary to measure the height of the pallet at every transfer location and input the height dimension to the automated guided vehicle. . Also, when stacking without using a platform, if the heights of the packages are different, the height of the pallet must be measured before inputting.

On the other hand, in the means for detecting the height of the pallet by detecting the height from the reflection plate, the reflection plate must be attached to the baggage in the case of stacking without equipment such as a pedestal. It must have a vertical surface such as a container. It is also necessary to measure the distance from the reflection plate to the pallet and input it to the automated guided vehicle. In addition, both means require encoders for distance measurement and the encoders must be highly accurate.

Therefore, an object of the present invention is to provide a carrier device that solves such a problem.

[0010]

[Means for Solving the Problems]

 In order to achieve such an object, the structure of the present invention comprises a pallet on which a load is placed, and a carrier for inserting a fork into a pallet to lift it. , A rotatable plate is installed to block the insertion port, and a biasing device is installed to block the insertion port from the inside to the outside. The feature is that a photoelectric sensor is provided at the tip of the fork while being attached.

[0011]

[Action]

 When the forks of the carrier that face the stacked pallets are lifted, light is emitted from the light emitting part of the photoelectric sensor at the tip of the forks. When the tip of the fork reaches the height of the reflection plate, the light from the light emitting section is reflected and returns to the photoelectric sensor again to be received by the light receiving section.

At the position where the light receiving section receives the light, the fork stops rising and the fork moves forward. Then, the rotating plate having the reflecting plate is pushed by the fork to rotate, and at the same time, the fork is inserted into the insertion port of the pallet. Therefore, it is possible to search for and carry the pallet on which the desired load is placed.

[0013]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

The construction of the carrying device according to the present invention is shown in FIGS. As shown in the figure, on one lower surface of a pair of insertion openings 11 for inserting the pair of forks 3 in the pallet 10, there is provided a rotating plate 12 which is rotatable around the lower part. As shown in FIG. 1, the rotating plate 12 is provided with a stopper (not shown) so that the rotating plate 12 is not pushed to the right in FIG. A spring (not shown) is provided. A reflection plate 13 is attached to the outer surface of the rotating plate 12.

On the other hand, a photoelectric sensor 4 is provided at the tip of the fork 3 of the automated guided vehicle corresponding to the reflection plate 13 as in the conventional case.

Next, the operation of such a transport device will be described. When the fork 3 is moved up to the position of the pallet where the automated guided vehicles are stacked and the fork 3 is raised and the light is emitted from the light emitting portion of the photoelectric sensor 4, the light emitting portion of the photoelectric sensor 4 is located when the fork 3 is located at the height of the reflection plate 13. The light emitted from is reflected by the reflection plate 13. Since this light is received by the light receiving portion of the photoelectric sensor 4, the height of the fork 3 when the light receiving portion of the photoelectric sensor 4 receives the light matches the height of the pallet 10. Therefore, if the pair of forks 3 are advanced toward the pallet 10 at this time, the forks 3 hit the reflecting plate 13 and push the rotating plate 12 as shown in FIG. Then, the rotating plate 12 is rotated counterclockwise against the urging force of a not-shown panel, and the fork 3 is inserted into the pallet 10 toward the rear. After that, if the fork 3 is raised, the pallet 10 and the load are raised at the same time, and the load can be transported. Since the rotating plate 12 rotates downward, the photoelectric sensor 13 is not destroyed by the fork 3.

[0017]

[Effect of device]

 As can be seen from the above description, since the reflecting plate is attached to the pallet itself in the transport apparatus according to the present invention, an encoder or the like for detecting the distance is unnecessary. In addition, since it is not necessary to attach the reflection plate to the luggage each time as in the conventional case, the luggage does not need to have a vertical surface, and the shape can be used without limitation. In addition, it is easy to install the transfer device because it eliminates the labor required to measure the height from the floor surface or the reflection plate to the pallet and input the measured value to the transfer vehicle at each transfer place as in the conventional method. Is.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a carrying device according to the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is an explanatory view of the operation of the transfer device according to the present invention.

FIG. 4 is an explanatory view of the operation of a conventional transfer device.

[Explanation of symbols]

 3 ... Fork 4 ... Photoelectric sensor 10 ... Pallet 11 ... Inserting port 12 ... Rotating plate 13 ... Reflecting plate

Claims (1)

[Scope of utility model registration request] 1. A transporting device comprising a pallet for carrying a load and a transporting vehicle for inserting a fork into the pallet and lifting the pallet. A rotating plate is provided, and a biasing means for biasing the insertion port from the inside toward the outside is provided to attach the reflection plate to the outer surface of the rotating plate, while the photoelectric sensor is attached to the tip of the fork. A transport device provided.