JPH089410B2 - Moving rack safety device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving rack device for controlling the movement of a plurality of shelves so that a working passage is optionally formed between the shelves, and particularly, the safety thereof is improved. The present invention relates to a safety device for a movable rack.

[0002]

2. Description of the Related Art As is well known, in a shelving apparatus for storing a large number of articles, files, etc., a moving shelving apparatus such as the one mentioned above is often used in order to improve space efficiency. In addition, such a moving shelf device is generally one in which a work passage corresponding to a target work surface of the shelf is formed by manually driving the individual shelf. It becomes difficult to move it manually when it becomes large or when there are many shelves.

Therefore, conventionally, by providing a self-propelled mechanism on each shelf and operating a passage selection switch corresponding to the work passage to be formed, a desired work passage is automatically formed. A variety of such moving shelving devices have been developed. That is, in this type of moving shelf device, a motor and a passage selecting switch are installed on each of a plurality of shelves set to be movable along a specified rail, and a passage selecting switch provided on an arbitrary shelf A. By operating, each of the shelves is moved by the motor so that the work passage a corresponding to the shelf A is formed. After the work passage a corresponding to the shelf A is formed, the work passage a is automatically interlocked so as to be held. This interlock state is maintained until the operator operates the reset switch installed on the shelf A, for example, when the worker leaves the work passage a.

By the way, in the actual work of taking out stored items from the moving shelf device, when the work passage b corresponding to the desired shelf B is formed by chance, the passage selection switch of the shelf B is operated. Without this, that is, without interlocking for holding the work passage b, an operator often goes into the work passage b to perform work. In this case, if another worker operates the passage selection switch of a shelf other than the shelf B, the problem arises that the shelf B is moved.

Therefore, conventionally, a safety measure is provided to install a safety stop bar on each shelf and forcibly stop the movement of each shelf by pushing this safety stop bar by an operator. ing.

However, in such a safety measure,
Until the safety stop bar touches the worker, the shelves are actually moved, so it is still not sufficient in terms of safety. For example, some workers forget to take out the work passage c that is about to be closed when the work for taking out the work passage c corresponding to the desired shelf C is completed and another work passage is opened. You may be in the aisle while the shelves are moving, such as when you are picking up something, and if you are an inexperienced worker, you should not enter the work aisle without interlocking. When someone is working on the floor, the operator suddenly moves the shelf and tries to close the aisle due to the operation of another worker, and he / she hurts to forget to press the safety stop bar, resulting in a more dangerous situation. Is actually happening, and it cannot be said that the safety stop bar alone is sufficient to ensure the safety.

[0007]

As described above, the conventional safety measures using the safety stop bar are still insufficient in terms of safety, and the worker does not interlock and the work passage When entering inside or entering the work passage that is about to be closed, the shelves will move even though there are workers in the work passage,
There is a problem that it cannot be said that it is a sufficient safety measure.

Therefore, the present invention has been made in consideration of the above circumstances, and when an operator enters the working passage without interlocking or enters the working passage that is about to be closed. In addition, it is an object of the present invention to provide an extremely good safety device for a moving shelf, which is provided with further safety measures.

[0009]

A safety device for a movable shelf according to the present invention comprises a plurality of shelves which are set so as to be movable along specified rails, and a motor which is set on each of the plurality of shelves. It is intended for a moving shelf device in which the shelves are movement-controlled to selectively form working passages between arbitrary shelves. Then, a detector for detecting that the worker has passed through the entrance / exit portion is installed at the entrance / exit portion of each work passage corresponding to each of the plurality of shelves, and while it is being closed.
When an operator enters the work passage of the
Interlock by automatically stopping the movement of shelves based on
And the worker enters the work passage while it is open.
When you open the shelves, do not stop the movement of the shelves and
To the existing work passage, select the passage selection switch corresponding to that passage.
Work without interlock without operating the switch
When the person enters , it is configured to automatically interlock.

[0010]

According to the above structure, the entrance and exit of the work passage formed on the work surface of each of the plurality of shelves,
A detector is installed to detect that a worker has passed through the entrance / exit , and first, the worker is placed in a work passage that is being closed.
When asked, the shelves are automatically stopped and interlocked based on the output of the detector, so it is possible that the shelves will be moved when the worker is in the work corridor. It is possible to secure enough safety. In addition, in the work passage already open,
Do not operate the passage selection switch corresponding to that passage.
Ku, that even if the operator entered without the interlock, automatically interlock or vignetting Runode the shelves based on the output of the detector, also this point to ensure a sufficient safety be able to. Furthermore, in the middle of opening
When workers enter the work corridor of
Since it is not stopped, the work passage is
Work in the aisle without waiting until the width is reached
It is possible to trace and improve work efficiency.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the entire state of the movable shelf device. In this case, for the sake of convenience, the first to third movable shelves 12a, 12 are provided with respect to the fixed shelf 11 set at the left end.
An example in which b and 12c are set is shown. These movable shelves 12a to 12c are set so as to be moved by wheels on a common rail 13, and each of the movable shelves 12a to 12c is equipped with motors M1 to M3 for rotationally driving the wheels. These motors M1 to M
According to the rotation direction of 3, the movable shelves 12a to 12c are moved to the right or left.

Further, the fixed shelf 11 and the movable shelf 12a ...
Each of the 12c is provided with limit switches LS0 to LS3 which are set adjacent to each other and are operated in a state of being brought into contact with the stop mechanism 14. Further, the fixed shelves 11 and the movable shelves 12a to 12c are provided with safety bar switches SB0 to SB3 which are operated by safety stop bars (not shown) set on the respective work surfaces. In addition, the fixed shelf 11 and the movable shelf 12
a to 12c are provided with passage selection switches PB0 to PB3 for instructing the formation of a work passage for each work surface, and for each work passage formed by moving the movable shelves 12a to 12c. Therefore, illumination lamps FL0 to FL3 such as fluorescent lamps are provided. The passage selection switches PB0 to PB3 also have the function of the above-described reset switch for releasing the interlock state.

Further, the fixed shelf 11 and the movable shelf 12a.
.. to 12c are provided with detectors IP0 to IP3 for detecting that the worker has passed through the entrances and exits of the respective work passages formed on the respective work surfaces. These detectors IP0 to IP3 are respectively combined with the light emitters OP0 to OP3, and are configured such that the light signals generated from the light emitters OP0 to OP3 are received by the detectors IP0 to IP3. By being blocked, it is detected that the worker has passed through the entrance / exit. In FIG. 1, CS indicates a main power switch, and LP indicates an indicator lamp for confirming that the main power is turned on.

FIG. 2 shows the configuration of an electric circuit system provided on the movable shelf 12a. In addition, other movable shelves 12
Since the configuration of the electric circuit system provided in b and 12c is similar to that of the movable shelf 12a shown in FIG. 2, the movable shelf 12a will be described here and the other movable shelves 12b and 12c.
The description thereof will be omitted. That is, the path selection switch PB1, the limit switches LS0 and LS1 and the safety bar switch SB1 are turned on and off and the detector IP.
The detection outputs of 1 are input to the input circuit 15, respectively.

The ON / OFF state of each switch and the detection output of the detector IP1 input to the input circuit 15 are supplied to a control circuit 16 including a microcomputer or the like to determine the situation, The output circuit 17 is controlled according to the determination result. This output circuit 17
On the basis of a command from the control circuit 16
The motor M1 is rotationally driven, the rotation is stopped, and the interlock state is controlled via the
Lighting and extinguishing of 1 are controlled.

Here, the operation when the worker enters the work passage while the movable shelves 12a to 12c are moving will be described with reference to the flow charts shown in FIGS. First, when the passage selection switches PB0 to PB3 are operated in step S2 after the start (step S1), a work passage corresponding to the operated passage selection switches PB0 to PB3 is formed in step S3. As described above, the movable shelves 12a to 12c start moving, and the illumination lights FL0 to FL3 of the work passage formed are turned on. Then, in step S4, when the worker enters the open work passage, in step S5,
The detectors IP0 to IP3 detect that the worker has passed through the entrance / exit of the work passage.

Then, in step S6, it is judged whether or not the unconditional stop is set. This unconditional stop setting unconditionally stops the movement of the movable shelves 12a to 12c regardless of whether the work passage in which the worker has entered is being opened or is being closed. Mode. If it is the unconditional stop setting (YES), step S7
Then, after the movement of the movable shelves 12a to 12c is immediately stopped,
In step S8, the movable shelves 12a to 1 on both sides of the work passage
2c is interlocked.

If the unconditional stop is not set (N
O), in step S9, it is determined whether or not the work passage that the worker entered is in the middle of closing, and if it is in the middle of closing (YES), in step S7, the movable shelves 12a to 12a ... After the movement of 12c is immediately stopped, step S
At 8, the interlocks are applied to the movable shelves 12a-12c on both sides of the work passage. On the other hand, if it is determined in step S9 that the worker's work passage is not a closed passage (NO), step S10
Then, the movable shelves 12a to 12c are continuously moved, and in step S11, the movable shelves 12a to 12c are stopped after the working passage having the regular width is formed, and then the step S8 is performed.
Thus, the movable shelves 12a to 12c on both sides of the work passage are interlocked.

Thereafter, in step S12, the work by the worker is started in the work passage, the work is finished in step S13, and the worker exits the work passage in step S14. Then, in step S15, when the worker again operates the passage selection switches PB0 to PB3 for the working passage that the worker has left, in step S16, the movable shelves 1 on both sides of the working passage.
With the interlock of 2a-12c released,
The illumination lamps FL0 to FL3 are turned off, and the process ends (step S1).
7) Is done.

Next, in the work passage already opened by the worker, the passage selection switches PB0 to PB3 corresponding to the passage are provided.
The operation in the case of operating without operating, that is, without interlocking the shelves on both sides of the working passage will be described with reference to the flowchart shown in FIG. First, when it is started (step S18) and the worker enters the work passage already open in step S19, in step S20, the detectors IP0 to IP3 pass the entrance / exit portion of the work passage by the worker. Detect that you have done.

Then, in step S21, the illumination lamps FL0 to FL3 of the work passage that the worker entered are turned on, and the movable shelves 12a to 1 on both sides of the work passage are turned on.
2c is interlocked. Then, in step S22, the work by the worker is started in the work passage, and in step S23, the work is finished,
At 24, the worker exits the work corridor. Then, in step S25, when the worker operates the passage selection switches PB0 to PB3 of the work passage that the worker exits, in step S26, the interlocks of the movable shelves 12a to 12c on both sides of the work passage are released, and the lighting is performed. The lights FL0 to FL3 are turned off, and the process ends (step S27).

Therefore, according to the configuration of the above-described embodiment, the operator can install the entrance / exit portion at the entrance / exit portion of the work passage formed on the work surface of each of the fixed shelf 11 and the movable shelves 12a to 12c. Detector IP that detects passing
0 ~ IP3 installed, if there is an unconditional stop setting, movable shelf 1
When 2a~12c worker while the is moving entered the work passage, an interlock automatically stops the movement of the movable shelves 12a~12c based on the output of the detector IP0~IP3 In addition, the interlock is released by the operator operating the passage selection switches PB0 to PB3 after exiting from the work passage, so that the movable shelves can be used when the worker is in the work passage. 12a
Since ~ 12c is not moved, the safety can be sufficiently ensured.

If the unconditional stop is not set, even if the worker enters the open work passage, the movable shelf 1
The movement of the movable shelves 12a to 12c is continued until the work passage having the regular width is formed without stopping the movement of the movements 2a to 12c. This is because if it is a work passage that is open, there is virtually no danger even if a worker enters, but rather, the work passage does not have to wait until a work passage with a regular width is formed. This is because it is possible to improve work efficiency by going inside and working. In short, whether or not the unconditional stop setting is performed may be appropriately selected as needed.

Further, even if the worker enters the working passage without interlocking, the detectors IP0-I
Since the movable shelves 12a to 12c are automatically interlocked based on the output of P3, sufficient safety can be ensured. When the detectors IP0 to IP3 detect that the worker has entered the work passage, the worker exits the work passage and selects the passage selection switch P.
It continues until B0 to PB3 are operated.

With respect to this point, the conventional movable shelf prevents damage to the stored items by moving the shelves when the stored items on the shelf fall into the aisle, and an operator interlocks the already opened aisle. In order to prevent the danger when other workers open the other corridors during the work without going out, the height of the underframe and waist should be adjusted corresponding to each corridor. Safety stop bars are provided on the upper and lower two stages of the shelf plate portion at the upper position.

However, if a safety stop bar is provided on the shelf board, it becomes difficult to set the shelf board up and down freely depending on the size of the stored items, and the original advantage of the moving shelf cannot be utilized. Become. Also, only this shelf board has a different specification from other shelf boards.

Therefore, non-contact detectors IP0 to IP3 are provided at the entrance and exit of the passage, and even if the worker does not notice the interlock in the already opened passage, the shelves on both sides of the passage are automatically added. By interlocking, it is possible to omit the safety stop bar of the shelf board portion, eliminate the restriction of vertical movement of the shelf board, and realize a safe and very easy-to-use moving shelf. The present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the scope of the invention.

[0028]

As described above in detail, according to the present invention,
It is said that further safety measures can be taken when a worker enters the work passage without interlocking or enters the work passage that is about to be closed.
At the same time, it is possible to provide a very good safety device for a moving shelf that can also contribute to improving work efficiency .

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a safety device for a movable shelf according to the present invention.

FIG. 2 is a block configuration diagram showing an electric circuit system of the embodiment.

FIG. 3 is a flowchart shown to explain the operation of the embodiment.

FIG. 4 is a flowchart shown to explain the operation of the embodiment.

FIG. 5 is a flowchart shown to explain another operation of the embodiment.

[Explanation of symbols]

11 ... Fixed shelf, 12a-12c ... Movable shelf, 13 ... Rail, 14 ... Stop mechanism, 15 ... Input circuit, 16 ... Control circuit, 17 ... Output circuit, 18 ... Drive circuit, M1-M3 ... Motor, LS0-LS3 ... Limit switches, SB0-S
B3 ... Safety bar switch, PB0-PB3 ... Path selection switch, FL0-FL3 ... Illumination lamp, IP0-IP3 ... Detector, OP0-OP3 ... Light emitter, CS ... Main power switch, LP ... Indicator lamp.

Claims (1)

[Claims] 1. A plurality of shelves are set so as to be movable along specified rails, and the movement of the shelves is controlled by motors respectively set on the plurality of shelves, so that the shelves can be moved between arbitrary shelves. In a moving shelf device that selectively forms a work passage, at a doorway portion of each work passage corresponding to each of the plurality of shelves, a detector that detects that a worker has passed through the doorway portion is installed, Work guide that is being closed
Based on the output of the detector when a worker enters the road
Automatically stops the movement of the shelf and interlocks
A worker entered the work passage while opening
When you do not stop the movement of the shelf,
For an open work corridor, select the corridor selection switch
Without operating the switch without interlock
A safety device for a mobile shelf, which is configured so that an interlock is automatically applied when a trader enters .