JPH02152806A - Moving rack - Google Patents

Abstract

PURPOSE:To simplify the constitution and to improve the safety by providing ropes having the respective one ends connected to the respective movable racks and the other ends connected to their own racks or an adjacent rack to control permission/non-permission of rack movement in a moving rack in which a working path can be arbitrarily formed between racks. CONSTITUTION:When the respective movable racks 12-15 are drawn to the left side, and connecting means 21-24 of rope-like members 17-20 are respectively connected to the second receiving portions of the adjacent racks, all the lights of indicator portions 33-36 are put out and indicator portions 37-40 are lighted. Under such a condition, in case of forming a working path between racks 13, 14, for example, connecting means 23 of rope-like members 19 is detached from receiving means 31, and installed on its own receiving means 27. By this operation, the indicator lamp 38 is put out, the indicator lamp 35 is lighted, and the movable racks 14, 15 are moved to the right to form a working path between the movable racks 13, 14. By this arrangement, the safety can be improved.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a movable shelf that moves a plurality of shelves and optionally forms a working passage between each column. , especially those designed to improve its safety.

(Prior Art) As is well known, in shelving devices for storing a large number of articles, files, etc., movable shelves as described above are often used in order to improve space efficiency. By the way, in this type of mobile shelf, each shelf is manually driven.
Generally, a work passage is formed that corresponds to the target work surface of the shelf, but when the shelf becomes large or there are many shelves, it becomes difficult to move it manually.

For this reason, conventionally, a motor and a passage selection switch are installed on each of a plurality of shelves, and by operating the passage selection switch provided on any shelf A, a working passage corresponding to that shelf A is formed. Various movable shelves have been developed in which each column is moved by the motor to automatically form a desired work passage.

By the way, in this type of movable shelf, various safety measures are taken to prevent the shelf from being moved while an operator is working in the formed working passage. As a safety measure, for example, as shown in Japanese Unexamined Patent Application Publication No. 49-52053, a string-like transition member having an electrical connection function is suspended between each shelf, and each column is connected via this transition member. Some devices are designed to supply power to a motor.

In this way, when entering the formed work passage, the power supply to the motors in each column is cut off by removing the crossing member suspended at the entrance of the passage.
This prevents the shelves from being moved carelessly during work.

However, with conventional mobile shelves that have the safety measures mentioned above, connecting devices such as sockets and connectors are used to make the transition members electrically and mechanically removable for each column. Since it is necessary to connect them, there are problems such as failures such as poor contact or breakage occurring in the connectors due to frequency of use or deterioration over time, and electrical disconnection occurring in the transition members.

(Issue 8 to be solved by the invention) As described above, in conventional movable shelves, the transition members suspended between each shelf perform an electrical connection function, so that the connections between the shelves and the transition members are There is a problem in that problems such as poor contact and wire breakage are likely to occur in the parts and the transition member itself, resulting in a lack of reliability.

Therefore, this invention was made in consideration of the above circumstances, and is an extremely simple structure that can ensure sufficient safety for workers without causing breakdowns due to frequency of use or aging. The purpose is to provide a good mobile shelf.

[Configuration of the Invention (Means for Solving the Problems) That is, the movable shelf according to the present invention includes a plurality of shelves movably set along specified rails, and The purpose of this invention is to selectively form passages between arbitrary shelves by moving the shelves using a motor.

A cable-like member having one end attached to the shelf, a connecting device attached to the other end of the cable-like member, and a connecting device provided on the shelf and connected to its own shelf can be attached and detached. 1 receiving part,
A second receiving part provided on the shelf and capable of attaching and detaching a connector connected to an adjacent shelf; and a control means for setting a state in which movement to each of the plurality of shelves is permitted or prohibited based on the switching states of the first and second switches. be.

Further, the control means allows the shelf having the connector attached to the first receiving part to move so as to form a passage, and also allows the shelf to move with the passage formed. is configured to control such that it is not permitted.

Furthermore, a certain correspondence is provided between the connector and the first and second receivers or the first and second switches to which the connector is attached, and the first and second receivers are connected to the first and second receivers. The first and second switches are configured to be operated only when the second receiving portion or the connector in a corresponding relationship with the first and second switches is attached.

(Function) According to the above configuration, a connecting tool is attached to each painting via a cable-like member, and each painting has a first receiving part that makes it possible to attach and detach the connecting tool connected to its own shelf. , a second receiving part that allows the connecting tool connected to the adjacent shelf to be attached and detached, and the first and second receiving parts are operated in conjunction with the attachment and detachment of the connecting tool to the first and second receiving parts. Based on the switching state of the second switch, the movement of each of the plurality of shelves is set to be permitted or prohibited, so that the cable member, the connector, and the first. Since there is no need to provide an electrical connection means to the second receiving part, the simple structure prevents breakdowns due to frequency of use or aging, and it is possible to ensure sufficient safety for workers. can.

Further, only when the first and second receiving portions are attached with connectors corresponding to the first and second receiving portions or the first and second switches, the first and second receiving portions are connected to the first and second receiving portions. Since the first and second switches are operated, even if another member is accidentally inserted into the first and second receiving parts, the first and second switches will not be operated undesirably, and the safety can be ensured.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the overall state of the movable shelves, and in this case, for convenience, it shows an example in which the first to fourth movable shelves 12 to 15 are set to the fixed shelf 11 set at the left end. ing. These movable shelves 12 to 15 are set to be moved by wheels on a common rail 16, and each movable shelf 12 to 15 is equipped with a motor (not shown) that rotationally drives the wheels. , each movable side 12 to 15 according to the direction of rotation of this motor.
is moved to the right or left in the figure.

Further, one ends of cable members 17 to 20 are attached to the fixed shelf 11 and movable shelves 12 to 14, respectively.

As these cable members 17 to 20, flexible materials such as cloth strings, synthetic resin ropes or chains are used. Then, the cable member 1
Connectors 21 to 24 are attached to the other ends of 7 to 20, respectively.

Here, the fixed shelf 11 and the movable shelves 12 to 14 are provided with first receivers that allow connecting devices 21 to 24 connected to the own shelves 11 to 14 via cable members 17 to 20 to be attached and detached. Sections 25 to 28 are provided, respectively. In addition, the movable shelves 12 to 15 have connectors 21 to 24 connected to the adjacent movable shelves 12 to 15 through cable members 17 to 20.
Second receiving portions 29 to 32 are provided, respectively, which allow the devices to be attached and detached.

Here, a first switch (not shown) is built into each of the first receiving parts 25 to 28, and a second switch (not shown) is built into each of the second receiving parts 29 to 32. There is. These first and second switches are normally set to the OFF state, and are linked to the fact that the connectors 21 to 24 are installed in the first and second receiving portions 25 to 28 and 29 to 32. , which is switched to the on state.

Further, the fixed shelf 11 and the movable l1ll112-14 have a first display part 3 in the vicinity of the first receiving parts 25-28.
3 to 3G are installed respectively. These first display sections 33 to 36 are turned on when the first switch is on, and turned off when the first switch is off.

Furthermore, the movable shelves 12 to 15 have second receiving portions 29.
- 32, second display sections 37-40 are installed, respectively. These second display sections 37 to 40 are turned on when the second switch is on, and turned off when the second switch is off.

Note that the fixed shelf 11 is provided with a focusing operator 41.

The general operation of the above configuration will be briefly explained. First, as shown in FIG. 1, all of the movable shelves 12 to 15 are moved to the left, and the
It is assumed that all of the second receiving parts 29 to 32 are attached. In this case, the first display sections 33 to 36 are all turned off,
All of the second display sections 37 to 40 are lit.

In such a state, for example, when attempting to form a working passage between the movable shelf 1111113 and the movable shelf 14, the worker must move the second receiving part 3 of the movable shelf 14 as shown in FIG.
The connector 23 is detached from the connector 1, and the connector 23 is attached to the first receiving part 27 of the own movable shelf 13.

Then, the second display section 39 of the movable shelf 14 is turned off, the first display section 35 of the movable shelf 13 is turned on, and as shown in FIG. direction.

When the movable shelves 14 and 15 are moved a predetermined distance, they are automatically interlocked and stopped from moving.
Here, a working passage is formed between the movable shelf 13 and the movable shelf 14. In this interlock state, even if you perform another operation to form a working passage,
At least the movable shelves 13.degree. 14 will not be moved, and the worker can enter the working passage between the movable shelves 13.degree. 14 and work safely.

When the work in the working passage formed between the movable shelves 13 and 14 is completed in this way, the worker connects the movable shelf 13 from the first receiving part 27 as shown in FIG. Ingredients 2
3 is removed, and the connecting tool 23 is attached to the second receiving part 31 of the movable shelf 14. Then, the first display section 35 of the movable shelf 13 is turned off, and the second display section 39 of the movable shelf 14 is turned on, so that the interlock is released and it is possible to form another work passage. It becomes a state.

For example, in the state shown in FIG. 4, when the worker detaches the connector 21 from the second receiving part 29 and attaches it to the first receiving part 25, the movable shelf 12.13 is moved to the right in the figure, A working passage is formed between the fixed shelf 11 and the movable shelf 12. Further, in the state shown in FIG.
6, the movable shelf 13 is moved to the right in the figure,
A working passage is formed between the movable shelves 12,13. Further, in the state shown in FIG. 4, when the worker detaches the connector 24 from the second receiving part 32 and attaches it to the first receiving part 28, the movable shelf 14 is moved to the left in the figure, and the movable shelf 14 is moved to the left in the figure. Shelf 14.1
A working passage is formed between 5 and 5.

In this case, each movable shelf 12-15 can be moved by detaching one of the connectors 21-24 from the first or second receiving part 25-28 or 29-32 to which it is attached. It is designed so that a quick emergency stop can be performed.

When the work on all the shelves 11 to 15 is completed, the worker releases the interlock, that is, the connectors 21 to 24 are attached to the second receiving parts 29 to 32, respectively. , operate the focusing operator 41 of the fixed shelf 11. Then, each of the movable shelves 12 to 15 is moved toward the fixed shelf 11, and the condensed state shown in FIG. 1 is achieved.

Next, the connectors 21 to 24 and the first and second receiving portions 25 to 28 and 29 to 32 will be explained. However, here, the connector 21 and the first receiving part 25 will be explained, and the other connectors 22 to 24 and the first and second receiving parts 26 to 28 and 29 to 32 have similar configurations. Since there is, I will omit the explanation.

That is, as shown in FIGS. 5 and 6, the connector 21
The grip portion 21b is formed at one end of an operating portion 21a formed in a substantially flat plate shape. Here, the grip portion 21b has a through hole 2 for connecting the cable member 17.
1c is formed. Furthermore, a circular through hole 21d and a vertically elongated hole 21e are formed in the center of the operating portion 21a.

On the other hand, the first receiving portion 25 is provided so as to protrude outward from the side surface of the fixed shelf 11, and has a guide hole 251 through which the operating portion 21a of the connector 21 can freely move in and out. A substantially hemispherical locking portion 252 is supported at the center of the guide hole 251 by a coiled spring 253 so as to be engaged with the through hole 21d and the elongated hole 21e of the operating portion 21a.

Further, in the first receiving portion 25, the above-described first switch 25a is provided. This first switch 25a
The operator 25b is opposed to the leading end in the insertion direction of the operating portion 21a of the connector 21. The first switch 25a has its operator 25b normally held at a position corresponding to the OFF state, and even if it is operated by an external force to a position corresponding to the ON state, the first switch 25a returns to the OFF state when the external force is removed. It is automatically returned to the corresponding position.

Here, when the operating portion 21a of the connector 21 is inserted into the guide hole 251 of the first receiving portion 25, the fifth
As shown in the figure, the elongated hole 21e is temporarily secured in a state in which it is engaged with the locking portion 252. In this temporarily fixed state, the operating portion 21a is not brought into contact with the operator 25b of the first switch 25a, and the first switch 25a remains in the off state.

On the other hand, when the connector 21 is inserted deeper from the temporarily fastened state, as shown in FIG.
The operator 25b is suppressed by the operation unit 21a to be turned on. At this time, the connector 21 is held with the locking part 252 engaged with the through hole 21d, so the first switch 25a is activated when the connector 21 is pulled out from the first receiving part 25 by the worker. It remains on unless otherwise specified.

Next, FIG. 8 shows a control device for controlling the mobile shelf as described above. That is, 42 in the figure is a main body of the control device, which is mainly configured with a main control circuit 42a made up of, for example, a computer. This main control circuit 4
2a receives information obtained from the input circuit 42C142d based on the program stored in the main memory circuit 42b.
- It performs arithmetic processing using the time storage circuit 42e, timer circuit 42f, etc., and generates and outputs various data necessary for controlling the movable shelf. .

The data output from the main control circuit 42a is used to drive the motors 12a to 15a installed on each movable shelf 12 to 15 via an output circuit 42g and a drive circuit 42h, and -15 for illuminating the work passage selectively formed between the lamps 1 to L4.

Here, the input circuit 42e includes each movable shelf 12 to 15.
limit switch 12b- for defining the width of the working passage formed between each shelf 11-15 by engaging with each other.
15b and each! ! ! Safety switches Lie to 15c are provided at the movable shelves 110 to 15 and stop the movement of the movable shelves 12 to 15 when touched by a worker in the work passage, and an indicator lamp indicates that the safety switches 12e to 15c are in an operating state. lid to 15d are connected.

In addition, the input circuit 42d includes second switches 29a to 32a and second display parts 37 to 40 provided in the second receiving parts 29 to 32 of each movable shelf 12 to 15, respectively,
First receiving portions 25- of fixed shelves 11 and movable shelves 12-14
First switches 25a to 28 respectively provided in z8
a, the first display sections 33 to 36, and the focusing operator 41
A focusing switch 41a operated by is connected thereto.

The operation of the above configuration will be explained in detail below with reference to the flowcharts shown in FIGS. 9 to 14. First, when started (step St), the main control circuit 42a controls the second movable shelves 12 to 15 in step S2.
A second switch 29a built in the receiving parts 29 to 32 of
32a are all turned on.

If all the second switches 29a to 32a are not in the on state (No), as shown in step S3, the second switches 29a to 32a in the on state are
The second display sections 37 to 40 corresponding to 32a are lit. Therefore, in step S4, the worker attaches the connectors 21 to 24 to the second receiving parts 29 to 32 corresponding to the second display parts 37 to 40 that are not lit. The connectors 21 to 24 are installed in the receiving portions 29 to 32 of the controller, and the second switches 29a to 32a are all turned on, and the process returns to step S2.

Further, in step S2, all the second switches 29a to 3
If it is determined that 2a is in the on state (YES)
, as shown in step S5, the second display sections 37 to 40
are all lit. Then, in step S6, the main control circuit 42a activates the second switch 25 built in the first receiving portions 25 to 28 of the fixed shelf 11 and the movable shelves 12 to 14.
It is determined whether all of a to 28a are in the off state.

If all the first switches 25a to 28a are not in the off state (NO), as shown in step S7, the first switches 25a to 28a in the on state are
The first display sections 33 to 3G corresponding to 28a are lit. Therefore, in step S8, the operator detects that the first switch 25 is clogged with foreign matter in the first receiving parts 25 to 28.
If a to 28a are turned on, abnormality processing such as removing the foreign object is performed, and then the process ends (step S9).
)do.

Further, in step S6, all the first switches 25a to 2
If it is determined that 8a is in the off state (YES)
As shown in step S10, the first display section 33-
All 3G lights are turned off.

In this way, all the first display sections 33 to 36 are turned off,
With all the second display sections 37 to 40 lit,
The worker moves the fixed shelf 11 and the movable shelf 12 in the step Sit.
It is determined whether or not it is requested to form a working passage between the
2, the connector 21 is pulled out from the second receiving part 29. Then, as shown in step S13, the second switch 2
9a is turned off, and the second display section 37 is turned off.

Next, in step S14, the worker connects the connector 21 to the first
It is attached to the receiving part 25 of. Then, as shown in step S15, the first switch 25a is turned on and the first display section 33 is turned on. In this state, as shown in step SIG, the main control circuit 42a starts an operation of moving the movable shelves 12 to 15 to form a working passage between the fixed shelf 11 and the movable shelf 12. .

In this path forming operation state, in step S17, the main control circuit 42a determines whether the first switch 25a, the second switch, and the switches 30a to 32a are all in the OFF state, and if they are in the ON state, (YES), the passage forming operation continues as it is, and in step 318, it is determined that the passage forming operation has ended, and the operation ends (step 5).
19) To be done.

Further, in step SL7, the first switch 25a and the second
If the switches 30a to 32a are not all on (
No), in step S2D, the main control circuit 42a forcibly stops the movement of each movable shelf 12 to 15, stops the passage forming operation, and ends the operation (step 521).

On the other hand, in step S11, if it is not required to form a work passage between the fixed shelf 11 and the movable shelf 12 (No), the worker, in step S22,
It is determined whether or not it is requested to form a working passage between Then, as shown in step S24, the second switch 30a is turned off, and the second display section 38 is turned off.

Next, in step S25, the worker connects the connector 22 to the first
It is attached to the receiving part 26 of. Then, as shown in step 826, the first switch 26a is turned on and the first display section 34 is lit. Then, in this state, as shown in step S27, the main control circuit 42a starts an operation of moving the movable shelves 12 to 15 to form a working passage between the movable shelves 12 and 13.

In this path forming operation state, in step 32B, the main control circuit 42a determines whether the first switch 26a and the second switches 29a, 31a, 32a are all on, and if they are on, (YES),
The passage forming operation continues as it is, and in step S29,
When it is determined that the path forming operation has ended, the operation is ended (step 530).

Further, if the first switch 2 (fa) and the second switches 29a, 31a, 32a are not all on (No) in step 32g, the main control circuit 42a controls the movement of each movable shelf 12 to 15 in step S31. is forcibly stopped to stop the passage forming operation, and the operation is ended (step 532).

Here, in step S22, if it is not required to form a work passage between the movable shelves 12 and 13 (No), the worker, in step S33,
It is determined whether or not it is requested to form a working passage between 3 and 14, and if it is requested (YES), the connector 23 is pulled out from the second receiving part 31 in step S34. Then, as shown in step S35, the second switch 31a is turned off, and the second display section 39 is turned off.

Next, in step 83B, the worker attaches the connector 23 to the first
The pipe is inserted into the receiving part 27 of the pipe. Then, as shown in step S37, the first switch 27a is turned on and the first display section 35 is turned on. Then, in this state, as shown in step 338, the main control circuit 42a starts an operation of moving the movable shelves 12 to 15 to form a working passage between the movable shelves 13 and 14.

In this path forming operation state, in step S39, the main control circuit 42a determines whether the first switch 27a and the second switches 29a, 30a, 32a are all in the on state, and if they are in the on state, (YES),
The passage forming operation continues as it is, and in step S40,
When it is determined that the path forming operation has ended, the operation is ended (step 541).

Further, in step S39, the first switch 27a and the second
If the switches 29a, 30a, and 32a are not all on (No), in step S42, the main control circuit 42a forcibly stops the movement of each movable shelf 12 to 15, stops the passage forming operation, and stops the operation. (step 543).

Next, in step S33, if it is not required to form a working passage between the movable shelves 13 and 14 (NO
) In step S44, the worker determines whether or not it is requested to form a working passage between movable shelves 14 and 15, and if it is requested (YES), step S45 is performed.
Then, the connector 24 is pulled out from the second receiving part 32. Then, as shown in step 34G, the second switch 32
a is turned on, and the second display section 40 is turned off.

Next, in step S47, the worker connects the connector 24 to the first
It is attached to the receiving part 28 of. Then, as shown in step 34g, the first switch 28a is turned on and the first display section 36 is lit. Then, in this state, as shown in step S49, the main control circuit 42a starts an operation of moving the movable shelves 12 to 15 to form a working passage between the movable shelves 14 and 15.

In this path forming operation state, in step S50, the main control circuit 42a determines whether the first switch 28a and the second switches 29a to 31a are all in the on state, and if in the on state (YES). ), the passage forming operation continues as it is, and in step S51, it is determined that the passage forming operation has ended, and the operation ends (step S55).
2) To be done.

Further, in step S50, the first switch 28a and the second
If the switches 29a to 31a are not all on (
NO), in step S53, the main control circuit 42a forcibly stops the movement of each movable shelf 12 to 15, stops the passage forming operation, and ends the operation (step 554).

Furthermore, if it is not required to form a working passage between the movable shelves 14 and 15 in step S44 (NO
), the worker determines whether or not the work has been completed in step S55, and if the work has not been completed (No), the process returns to step S2.

Also, if the work has been completed (YES), step 35
At B, the worker operates the focusing operator 41.

Then, as shown in step S57, the main control circuit 42
Step a starts the operation of moving the movable shelves 12 to 15 to bring them into the converging state shown in FIG. 1 earlier.

In this focusing operation state, in step 558, the main control circuit 42a determines whether all the second switches 29a to 32a are in the on state, that is, whether or not each of the connectors 21 to 24 is connected to the second receiving portion 29. - 32, and if it is on (YES), the focusing operation continues as it is, and in step S59, the end of the focusing operation is determined, and the operation ends (step 560).
) to be done.

In addition, in step 858, all the second switches 29a~
If 32a is not in the on state (No), step S6
1, the main control circuit 42a forcibly stops the movement of each movable shelf 12 to 15, stops the focusing operation, and ends the operation (
Step 562).

Therefore, according to the configuration of the above embodiment, the cable members 17 to 20. Connectors 21 to 24 and the first. Since the second receiving portions 25 to 28 and 29 to 32 are not provided with electrical connection means, the structure is simple and failures due to frequency of use or deterioration over time are less likely to occur. Also,
The movable shelves 12 to 15 can be moved by pulling out any of the connectors 21 to 24 from the first and second receiving parts 25 to 28 and 29 to 32, regardless of whether the passage is being formed or converging.
Since the movement is forcibly stopped, sufficient safety for the workers can be ensured.

Here, as shown in FIG. 15, a protrusion 211' is formed at the tip of the coupling tool 21 in the insertion direction, and a magnet sheet 21g is pasted on this protrusion 211'. Alternatively, switching may be performed by detecting magnetism with the magnetic sensor switch 43 while the connector 21 is attached to the first receiving portion 25.

According to such a configuration, even if another member is accidentally inserted into the first receiving portion 25, the magnetic sensor switch 43 will not be operated to switch, and sufficient safety can be ensured. Moreover, it is not limited to the one that detects the magnetism of the magnet sheet 21g, and for example, a magnetic card, a connector, etc.
barcode label.

A punched card or the like is pasted, and a magnetic card reader and barcode reader are installed on the first and second receiver sides.

Switching may be performed by reading the magnetic code using a punching card reader or the like.

In short, the connector and the first and second connectors to which the connector is attached
It is sufficient to establish a certain correspondence relationship between the receiving part of the connector or the first and second switches so that the first and second switches are operated only when the corresponding connector is attached. It is.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist of this invention.

[Effects of the Invention] Therefore, as described in detail above, according to the present invention, the simple structure prevents breakdowns due to frequency of use, deterioration over time, etc.
＜It is possible to provide an extremely good movable shelf that can ensure sufficient safety for workers.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a movable shelf according to the present invention, FIGS. 2 to 4 are side views for explaining the schematic operation of the same embodiment, and FIGS. 5 to 7 The figures are a side sectional view, a plan view, and a side sectional view showing details of the connector and its receiving part used in the same embodiment, respectively. FIG. 8 is a block configuration diagram showing the control device of the same embodiment, and FIGS. FIG. 14 is a flowchart for explaining the detailed operation of the same embodiment, and FIGS. 15 and 16 are a side sectional view and a plan view, respectively, showing modified examples of the connector and its receiving portion. 11...Fixed shelves, 12-15...Movable shelves, 113.
...Rail, 17-20...Rope-shaped member, 21-24.
... Connector, 25-28... First receiving part, 29-3
2... Second receiving part, 33-36... First display part, 37-40... Second display part, 41... Focusing operator, 42... Control device main body, 43...Magnetic sensor switch. Figure 1 Applicant's agent Takehiko Suzue, patent attorney Figure 2 Figure A

Claims (3)

[Claims] (1) A plurality of shelves are provided so as to be movable along a specified rail, and the shelves are moved by a motor set on each of these shelves to select a passage between arbitrary shelves. In a movable shelf that is shaped like
A cable-like member with one end attached to the shelf, a connector attached to the other end of the cable-like member, and a connector provided on the shelf and connected to its own shelf are removable. a first receiving part, a second receiving part provided on the shelf and connected to an adjacent shelf, which allows the connecting tool to be attached and detached; and the connecting tool is connected to the first and second receiving parts. first and second switches that are operated in conjunction with attachment and detachment, and a state in which movement is permitted or not permitted with respect to each of the plurality of shelves based on the switching states of the first and second switches; A movable shelf characterized by comprising a control means for setting. (2) The control means allows the shelf, on which the connector is attached to the first receiving part, to move so as to form a passage, and the shelf is in a state in which the passage is formed. 2. The movable shelf according to claim 1, wherein the movable shelf is controlled such that movement of the shelf is not permitted. (3) A certain correspondence is provided between the connector and the first and second receivers or the first and second switches to which the connector is attached, and the first and second receivers are provided with a certain correspondence. , the first
and only when the connector in a corresponding relationship with the second receiver or the first and second switches is installed;
3. The movable shelf according to claim 1, wherein the first and second switches are configured to be operated.