JPH06100105A - Automatic warehouse - Google Patents

Abstract

PURPOSE:To secure safety of an operator in charge of maintenance and inspection by providing a take-in-and-out device moving on a constant route, providing a control device and a door body of the take-in-and-out device at a position opposite to the constant route and providing a light transmission device to deliver and receive a signal between the door body and the take-in-and-out device. CONSTITUTION:A take-in-and-out device 1 moving on a constant route 4 in front of shelves 2, 3 having a load storage space and having a take-in-and-out tool 5 is provided. In a position opposite to the constant route 4, a control device 26 and a door body 13 free to open and close of the take-in-and-out device 1 are provided. On this door body 13, light transmission devices 27, 28 connected to the control device 26 and to deliver and receive a signal to and from the take-in-and-out device 1 are provided. Control is carried out by delivering the signal from the control device 26 to the take-in-and-out device 1 through the light transmission devices 27, 28. Consequently, it is possible to move the take-in-and-out device 1 and to make a motion combined with the take-in-and-out tool 5. Additionally, at the time of maintenance and inspection of the shelves 2, 3 and the take-in-and-out device 1, the light transmission devices 27, 28 stop without confronting the take-in-and-out device 1, and accordingly, it is possible to secure safety of an operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic warehouse which is installed indoors for storing and storing loads, and for loading and unloading loads as needed.

[0002]

2. Description of the Related Art Conventionally, as an automatic warehouse of this type, for example, the structure disclosed in Japanese Utility Model Laid-Open No. 1-169511 is provided.

That is, conventionally, as shown in FIG. 4, shelves 2 and 3 having a plurality of load storage spaces and rails 9 and 10 arranged outside the ends of the shelves 2 and 3 are freely movable. Outside of the loading and unloading devices 7 and 8, the traveling crane 1 for loading and unloading, which can travel freely on the shelves 2 and 3 and the travel path (constant route) 4 along the front surfaces of the loading and unloading devices 7 and 8, and the loading and unloading devices 7 and 8. A safety fence 16 disposed in each of the above, and a crane operation panel 11, a safety fence 12, and an opening / closing door 13 which are disposed in a U-shape at a position lateral to the material handling devices 7 and 8 and facing the traveling passage 4. have. The loading and unloading traveling crane 1 is provided with an elevator carriage 6 on which cargo storage spaces for shelves 2 and 3 and loading and unloading devices 7 and 8 are loaded and unloaded. A fork 5, which is a tool for taking in and out, is provided. Further, as shown in FIG. 5, the crane operation panel 11 is provided with an operation panel 14 on the surface thereof and a control device (hereinafter referred to as a ground side control device) 15 inside thereof.

Further, as shown in FIGS. 5 and 6, a hinge 17 of an opening / closing door 13 is provided on the side of the safety fence 12, and a crane operation panel 11 is provided.
A member 18 for restricting the movement of the opening / closing door 13 is provided on the front surface (the surface opposite to the traveling passage 4) of the fixed wall 11a (the surface of the traveling passage 4) so as not to open / close on the traveling passage 4 side. 13 is configured to open and close to the front side.
An opening / closing lever 19 is provided above the front surface of the fixed wall 11a of 13 and the lock lever 20 is connected to the shaft on the back side of the opening / closing lever 19.
A hook 22 for hooking the lock lever 20 on the fixed wall 11a and a limit switch 23 for detecting that the lock lever 20 is hooked on the hook 22 by moving the detection lever 23a are provided. Further, an interlock circuit in which the crane power on / off electromagnetic relay 24 is operated via the power switch 25 by the normally closed contact 23b of the limit switch 23 is provided. In addition, at the lower part of the back surface of the crane operation panel 11, the traveling side control device 26 is provided so as to face the optical transmission device (not shown) of the control device (hereinafter referred to as the traveling side control device) 26 of the traveling crane 1 for loading and unloading. An optical transmission device 27 for transmitting a signal to is provided.

According to this conventional type, the crane operation panel 11
By operating the operation panel 14 of the above, by transmitting a command signal from the ground side control device 15 to the traveling side control device 26 by the optical transmission device 27, the loading and unloading traveling crane 1 loads the desired shelves 2, 3 on the shelves 2. Loads are transferred between the storage space and the handling devices 7 and 8.

Further, the limit switch 23 detects whether the open / close door 13 is in the closed state, and only when the closed state is detected by the limit switch 23, the electromagnetic relay 24 for turning on / off the power supply is operated to turn on / off. Power is supplied to the traveling crane 1 for shipping. Therefore, when the operator opens the opening / closing door 13, the supply of power to the loading / unloading traveling crane 1 is stopped, so that the loading / unloading traveling crane 1 is stopped,
The safety of workers is achieved.

[0007]

However, according to the above-mentioned conventional type, when the limit switch 23 is in the locked state, the power supply to the loading / unloading traveling crane 1 is not stopped even if the opening / closing door 13 is opened. Since the operation of the loading / unloading traveling crane 1 is continuously executed, the worker may be at risk.

The present invention solves the above problems,
Further, the object is to provide an automated warehouse equipped with worker safety measures.

[0009]

In order to solve the above problems, an automatic warehouse of the present invention comprises a shelf having a plurality of load storage spaces,
Provided is a loading / unloading device having a loading / unloading tool that is movable along a front path of the shelf and can be moved in and out laterally, and can be opened and closed with a control device of the loading / unloading device at a position facing the predetermined path. A door body is provided, and the door body is provided with an optical transmission device that is connected to the control device and exchanges signals with the access device.

[0010]

According to the above configuration of the present invention, a signal is sent from the control device to the loading / unloading device via the optical transmission device to perform control, whereby the movement of the loading / unloading device is combined with the lateral movement of the loading / unloading device. By performing the operation, the load can be delivered to and from the target load storage space.

Further, the maintenance and inspection of the shelves and the loading / unloading device are carried out by the operator opening the door and entering into a predetermined route with the operation of the loading / unloading device stopped. The optical transmission device no longer faces the access device,
Since the sending and receiving of signals is stopped, the loading / unloading device is stopped, and the safety of workers is ensured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional example shown in FIGS.

1 and 2, reference numeral 13 'denotes an opening / closing door modified so that the fixed wall 11a side of the crane operation panel 11 is used as a fulcrum, and an opening / closing lever 19, a lock lever 20, and a hook.
22 and limit switch 23 are moved to the safety fence 12 side.

An optical transmission device 27 'for transmitting a signal to the traveling side control device 26 is provided below the rear surface of the opening / closing door 13'. An optical transmission device 28 of the traveling side control device 26 is provided at a position facing the optical transmission device 27 'when the opening / closing door 13' is closed.

FIG. 3 is a control block diagram of the automatic warehouse of the present invention.
Show to. The ground-side control device 15 and the traveling-side control device 26 include an optical transmission device 27 'fixed to the opening / closing door 13' and this optical transmission device 2 '.
7'is connected via an optical transmission device 28 installed in the traveling crane 1 for loading and unloading. A detection signal is input to the traveling-side control device 26 from a sensor system 29 that is installed in the loading / unloading traveling crane 1 and includes an encoder of a traveling motor. A drive signal is output to a drive system 30 including a traveling motor, a raising / lowering carriage 6 raising / lowering motor, and a fork 5 driving motor (none of which are shown). In addition, a power supply device 32 to which the AC power is supplied to the loading / unloading traveling crane 1 via a cable 31 provided along the traveling passage 4.
Is provided. Further, the cable 31 is provided with a contact 24a of a power on / off electromagnetic relay 24 which is turned on when the limit switch 23 is turned on, that is, when the opening / closing door 13 'is closed.

Further, the signal of the basic pulse number is always output from the optical transmission device 27 ', and when the control signal is sent from the ground side control device 15, the pulse number set in advance for the control signal is set. Is changed to output. Further, the optical transmission device 28 of the traveling side control device 26 means that it always receives the signal, and when detecting that the signal is interrupted, it outputs an abnormality signal to the traveling side control device 26, and the traveling side control device. When 26 receives this abnormal signal, it outputs a stop signal to drive system 30,
The traveling of the traveling crane 1 for loading and unloading, the raising and lowering of the elevator carriage 6, and the loading and unloading operation of the fork 5 are all stopped.

With the above construction, maintenance and inspection of the shelves and the loading / unloading device are performed by the operator opening the open / close door 13 'and entering the traveling path 4 while the operation of the loading / unloading traveling crane 1 is stopped. However, at that time, the optical transmission device 27 ′ provided on the opening / closing door 13 ′ does not face the optical transmission device 28 of the traveling side control device 26, and the signal constantly output is the optical transmission device of the traveling side control device 26. Since it is not received at 28, the traveling-side control device 25 stops all operations of the loading / unloading traveling crane 1, thus ensuring the safety of the worker.

As described above, the conventional limit switch 23 turns off the contact 24 of the power-on / off electromagnetic relay 24 to stop the supply of power to the loading / unloading traveling crane 1, and also By stopping the operation of the traveling crane 1 for loading and unloading on the traveling side control device 25 side of the traveling crane 1 for use as well, it is possible to double the safety measures for workers and improve the safety reliability. .

In the present embodiment, the optical transmission device 27 'is transferred to the opening / closing door 13', and the fact that the optical axis is displaced due to the opening operation of the opening / closing door 13 'makes it impossible to transmit a signal. However, a single optical oscillator is provided for the opening / closing door 13 of the conventional example, and a light receiving device for receiving the light of this optical oscillator is provided for the traveling crane 1 for loading / unloading. It is also possible to detect the opening operation. However, there is a problem that the cost increases due to the addition of the optical oscillator and the light receiver.

[0020]

According to the present invention having the above-described structure, by the control of the control device, a combined operation of the movement of the loading / unloading device and the lateral movement of the loading / unloading device is performed, so that a desired load storage space can be obtained. It is possible to transfer cargo between the two.

Further, the maintenance and inspection of the shelves and the loading / unloading device are carried out by the operator opening the door and entering into a predetermined route with the operation of the loading / unloading device stopped. The optical transmission device no longer faces the access device,
Since the transmission and reception of signals are stopped, the loading / unloading device is stopped, and thus the safety of the worker can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a main part of an automated warehouse according to an embodiment of the present invention.

FIG. 2 is a front view of a crane operation panel and an opening / closing door of the automated warehouse.

FIG. 3 is a control block diagram of the same automated warehouse.

FIG. 4 is a perspective view of a main part of a conventional automated warehouse.

FIG. 5 is a front view of a conventional crane operation panel and an opening / closing door of an automated warehouse.

FIG. 6 is a perspective view of a main part of an opening / closing door of a conventional automatic warehouse and a control circuit diagram thereof.

[Explanation of symbols]

 1 Traveling crane for loading and unloading (loading / unloading device) 2, 3 Shelf 4 Traveling path (fixed route) 5 Fork (loading / unloading device) 11 Crane operation panel 13 'Open / close door (door body) 15 Ground-side control device 26 Travel-side control device 27 ', 28 Optical transmission equipment

Claims (1)

[Claims] 1. A shelf having a plurality of load storage spaces and a loading / unloading device having a loading / unloading device that is movable on a fixed path along the front surface of the shelf and that can be moved in and out laterally are provided on the fixed path. A control device of the loading / unloading device and an openable / closable door body are provided at opposing positions, and an optical transmission device connected to the control device and transmitting / receiving a signal to / from the loading / unloading device is provided on the door body. An automated warehouse characterized by that.