JPH03133809A - Automatic warehouse - Google Patents

Abstract

PURPOSE:To improve safety by a method wherein an object to be detected is mounted on the uppermost stage moving part of an input and output device, and the object to be detected is detected by a device on the elevating platform side when the uppermost stage moving part is moved to the given position of the input output device. CONSTITUTION:In combination of running of a running body on a specified route, elevation of an elevating platform 16, and lateral entering and existing movement of an input and output device 18, a cargo is taken in and out. When a lowermost stage moving part 24 is moved to a given position in a fixing part 21 through entering and existing movement of the input output device 18, a control tool 43 turns ON a limit switch 42 to stop a motor 36. Simultaneously, the uppermost stage moving part 33 also enters and exists. When the uppermost stage moving part 33 is moved to a given position in the fixing part 21, a reflection plate 45 is brought into a state to be positioned facing a photoelectric switch 47, the photoelectric switch 47 is turned ON and a delivery device is operated. But, when the uppermost stage moving part is not moved to the position, the delivery device is not operated to sound an alarm.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to the loading and unloading of cargo into and out of compartment storage spaces of shelves.
This invention relates to an automatic warehouse that is automatically operated by a loading/unloading device.

BACKGROUND OF THE INVENTION Various types of automatic warehouses have been provided in which a divided storage space is formed so that a plurality of items can be freely stored in the depth direction, and a multi-stage loading/unloading device is provided. For example, as seen in Japanese Patent Application Laid-Open No. 157102/1982, a shelf having a plurality of compartment storage spaces in the vertical direction is provided, and each compartment storage space is formed so as to be able to freely store a plurality of items in the depth direction. A configuration is provided in which a lifting platform is provided on the front side of the shelf, and a loading/unloading device that can be freely moved in and out is provided on the lifting platform.

The loading/unloading device is of a multi-stage fork type, and by operating its uppermost movable portion (primary fork) on the front or back of the divided storage space, it is possible to load/unload a plurality of items in the depth direction. The uppermost movable section is equipped with an inventory detector and the like. The above-mentioned loading and unloading device is operated by hanging and passing a plurality of chains between each fork, and in order to detect when the uppermost movable part is housed in the lifting platform, a limit switch is installed on the lifting platform side. In addition, an operating tool for the limit switch is provided on the lower surface of the lowermost movable section.

Problems to be Solved by the Invention According to the above-mentioned conventional type, when the check 7 extends or breaks during operation, even when the lowermost movable part is housed in the lifting platform and the operating tool is detected by the limit switch, The upper movable section will remain in the divided storage space, and moving to the next operation such as traveling based on the above-mentioned detection will cause a dangerous situation such as the uppermost movable section colliding with the shelf side.

An object of the present invention is to provide an automatic warehouse that can be controlled so that even if the egress/egress drive device of the ejector is damaged, the move will not proceed to the next operation unless the uppermost movable part is completely settled in a predetermined position. The point is to provide the following.

Means for Solving the Problems In order to achieve the above object, the automatic archive in the present invention includes:
A shelf with multiple compartment storage spaces in the vertical direction is provided, and each compartment storage space is formed so that it can freely store multiple items in the depth direction.
A delivery device having a lifting platform is provided on the front side of the shelf,
The elevating table is provided with a multi-stage loading/unloading device that can freely move in and out of the divided storage space, and a driving device for the loading/unloading device, and a detected object is provided in the uppermost movable part of the loading/unloading device. A detection device is provided on the lifting platform side to detect the detected object when the uppermost stage movable part is housed in a predetermined position of the loading/unloading device.

According to the configuration of the present invention, cargo can be loaded into and taken out of the target compartment storage space by a combination of the lifting and lowering movement of the lifting platform and the lateral movement in and out of the loading/unloading device. At that time, by setting the protrusion amount of the top movable part to a single reach that is approximately equal to the left and right length of the top movable part, it is possible to enter and exit the front part of the compartment storage space, and the protrusion amount can be adjusted to a single reach that is approximately equal to the left and right length of the top movable part. By having a double reach that is almost double the left and right length of the compartment, it is possible to enter and exit from the back of the divided storage space. Then, move the loading and unloading device in and out, and the top movable part is at the specified position! , the detection device detects the object to be detected, and the delivery device is thereby controlled to perform the next operation. In addition, when the ejection/retraction drive device performs the intended retraction movement and the uppermost movable part cannot be placed in the designated position due to damage to the egress/retraction drive device, the detection device may not detect the object to be detected. Therefore, the delivery device does not move on to the next operation.

Example An embodiment of the present invention will be described below based on the drawings.

4 to 6, reference numeral 1 denotes a fence having a plurality of compartment storage spaces 2 in the vertical and horizontal directions, and includes vertical frames 3 erected at predetermined intervals and cargo trays attached to the inner surfaces of these vertical frames 3. It is composed of plates 4 and the like, and is arranged in pairs with a passage 5 in between. The compartment storage space 2 has a depth dimension L1 set so that a plurality of loads, here two loads 7, can be stored in the depth direction. A delivery device 9 is disposed within the passageway 5 and is movable along a constant diameter H8 along the front surface of the shelf 1.

This delivery device 9 includes a traveling body 12 supported by a floor rail 10 via wheels 11, a traveling drive device 13 interlocked with the wheels 11, and a boss 14 erected from the traveling body 12.
The guide rail 15 attached to this guide rail 1
5, a lifting drive device 17 interlocked with the lifting table 16, a pair of front and rear loading and unloading devices 18 disposed on the lifting table 16 so as to be able to move in and out in the lateral direction, and a control panel 19.
It consists of. The loading/unloading device 18 is of a multistage fork type, and as shown in FIGS.
2 and a guide roller 23 to support and guide the lowermost movable part 24, and a support roller 25 to this lowermost movable part 24.
and a lower intermediate stage movable part 27 that is supported and guided via a guide roller 26 and an upper intermediate stage movable part 30 that is supported and guided by this lower intermediate stage movable part 27 via a support roller 28 and a guide roller 29. , an uppermost movable section 33 supported and guided by the upper intermediate movable section 30 via a support roller 31 and a guide roller 32. The ejection/removal drive device 35 of the ejection/removal device 18 is connected to a motor 36 which is attached to the lower surface of the fixed part 21 and can be freely driven in forward and reverse directions, and a drive feed ring 37 attached to the output shaft of the motor 36 and a plurality of idle chain rings. The lowermost stage movable part 24 and the lower intermediate stage movable part 27
The first chain 38 is fixed to the lower intermediate stage movable part 27 in the same way, and the second chain 39 is similarly hung on the lower intermediate stage movable part 27 side and has both ends fixed to the lowermost stage movable part 24 and the lower intermediate stage movable part 27. It is composed of a third chain 40 that is hung on the upper intermediate stage movable part 30 and fixed at both ends to the lower intermediate stage movable part 27 and the uppermost stage movable part 33. In addition, Cheno 38-4
0 etc. are arranged separately for left side protrusion operation and right side protrusion operation.

A limit switch 42 is disposed on the fixed part 21 via a bracket 41, and a limit switch 42 is disposed on the lower surface of the lowermost movable part 24 when the lowermost movable part 24 is in a predetermined position. Operation tool 4 to turn on
3 is provided. Note that when turned on, the motor 36 is stopped via the control panel 19.

A reflecting plate 45, which is an example of an object to be detected, is attached to the lower surface of the uppermost movable part 33 via a bracket 46, and this reflecting plate 45 faces laterally and downward.

A photoelectric switch 47, which is an example of a detection device, detects the reflection plate 45 when the uppermost movable part 33 is placed in a predetermined position within the elevator platform 16.
It is arranged on the side via a bracket 48.

Next, the operation of the above embodiment will be explained.

Basically, cargo is handled by a traveling aircraft 12 on a fixed path 8.
, the vertical movement of the lifting platform 16, and the loading/unloading device 18.
This is performed in combination with the lateral pick-up and drop-off movement, and thereby the cargo can be transferred between the target compartment storage space 2 and the cargo receiving platform 6. At this time, the loading/unloading device 18 operates the motor 36 so that each chino 38, 39, 4
The protruding or retracting movement is performed in multiple stages through the 0, etc., and at this time, by making the amount of protrusion of the uppermost movable part 33 a single reach that is approximately equal to the left-right length of the fixed part 21, as shown in FIG. As shown in FIG. By providing a double reach, it is possible to enter and exit the inner part of the divided storage space 2.

Then, the loading/unloading device 18 is moved in and out, and the lowermost movable section 2
4 is placed in a predetermined position within the fixed part 21, the operating tool 43 turns on the limit switch 42, thereby stopping the motor 36 via the control panel 19. At this time, the uppermost movable part 33 also moves back and forth, and when the uppermost movable part 33 is settled in a predetermined position within the fixed part 21, the reflection plate 45 faces the photoelectric switch 47. Then, the optical axis from the photoelectric switch 47 collides with the reflection plate 45 and is reflected, which turns on the photoelectric switch 47, and the delivery device r11.9 starts the next operation according to instructions from the control panel 19. I will be moving.

Furthermore, for example, due to stretching or cutting of the chino 38, 39, or 40, even when the egress/retraction drive device 35 performs the intended retraction movement, the uppermost movable portion 33 may not be in the predetermined position within the pronation of the fixed portion. In this case, if the reflecting plate 45 does not face the photoelectric switch 47, the photoelectric switch 47 will not be turned on because a reflected optical axis will not occur, and the delivery device 9 will not move on to the next operation. By issuing an alarm or the like, the operator is informed of the unexpected situation.

Effects of the Invention According to the present invention having the above configuration, it is possible to confirm whether or not the retraction movement of the loading/unloading device has been performed normally by detecting whether or not the uppermost stage movable part is housed in a predetermined position. If the ejection/retraction drive device is damaged due to stretching or cutting of the chino, it can be controlled so that it does not move on to the next operation, thereby avoiding a dangerous situation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the loading/unloading device, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, and FIG. 4 is a plan view showing the fence and delivery device. , FIG. 5 is a side view of the same, and FIG. 6 is a front view of the same. DESCRIPTION OF SYMBOLS 1... Shelf, 2... Compartment storage space, 4... Load receiving plate, 7... Load, 8... Fixed path, 9... Delivery device, 12... Traveling body, 16.・・Lifting platform, 18・・
- Loading/unloading device, 19... Control panel, 21... Fixed part, 24... Lowermost movable part, 27... Lower intermediate stage movable part, 30... Upper intermediate stage movable part, 33...・Top stage movable part, 35... Exit/retraction drive device, 36... Motor, 3
8...1st chain, 39...2nd chain, 40...
・Third chain, 45...Reflector (detected object), 47・
・Photoelectric switch (detection device)

Claims (1)

[Claims] 1. Provide a shelf with multiple compartment storage spaces in the vertical direction,
Each compartment storage space is formed to be able to freely store a plurality of items in the depth direction, and a delivery device having a lifting platform is provided on the front side of the shelf, and the lifting platform has multiple stages that can freely move in and out of the compartment storage space. A type loading/unloading device and an ejection drive device for the loading/unloading device are provided, a detected object is provided on the uppermost movable part of the loading/unloading device, and the uppermost movable portion is provided at a predetermined position of the loading/unloading device on the side of the lifting platform. An automatic warehouse characterized by being provided with a detection device that detects the object to be detected when the parts are stored.