JP2760279B2 - Movement control device for electric moving rack 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 movement control device of an electric moving rack device widely used in offices and libraries as a substitute for a storage, a bookshelf and the like.

[0002]

2. Description of the Related Art As an electric movable rack apparatus of this type, an electric movable rack apparatus having a plurality of movable racks having shelves mounted on a rail laid on the floor so as to be movable in a depth direction of the shelves by an electric driving device is known. General. Such a movement control device of an electric moving rack device is often arranged near a moving rack installation location, and operates a switch or the like at that position to move the moving rack to a desired position. Is configured. In order to prevent an accident of a user entering the passage formed between the moving racks, for example, a means for detecting a change in weight is provided on the floor between the rails, and a predetermined weight is set by the user or a book. There is known a control that prohibits the movement of the movable rack while detecting a weight exceeding the maximum. In such a device, a reset switch is provided at the entrance side of the movable rack so that the prohibition can be released when the user exits the passage, and the movable rack is moved when the reset switch is operated. It is configured so that it can be restarted.

[0003]

However, for a user who is always using it, operating the reset switch after use to release the interlock of prohibition of movement is a matter of daily use when using this device. This is a difficult task, but those who do not use it often may forget about the existence of such a reset switch. In that case, the next user must first go to the movable rack, operate the reset switch, and then return to the front of the movement control device again and perform the operation for movement,
Operation may be complicated.

An object of the present invention is to solve such a problem.

[0005]

In order to achieve the above object, the present invention takes the following measures. That is, the movement control device of the electric moving rack device according to the present invention includes a plurality of moving racks which are mounted on the rail so as to be able to come and go with each other, and the moving rack faces a moving rack adjacent to each other. A driving unit electrically connected to an electric movable rack device having a section, and moving the movable rack to a desired position when a passage formed between the movable racks is not in use. A movement control device for controlling a moving rack device, comprising: detecting means provided on the wall portion for detecting entry and exit into and out of a passage formed between the moving racks in a non-contact state; Movement determining means for determining movement and prohibition of movement of the moving rack forming the passage in accordance with the state of the entered and exited, and the driving means based on the determination of the movement determining means. Is electric To control the moving rack device
And the difference between the number of times of entering and exiting the passage is 0
In this case, the moving rack is allowed to move.
It is characterized in that form.

[0006] More specifically, a plurality of detection means and movement determination means are mounted on a rail so as to be able to come and go with each other.
A mobile rack consisting of mobile racks with mobile racks adjacent to each other
Motorized moving rack having a wall facing the rack
Formed between moving racks, electrically connected to equipment
Move the mobile rack to the desired position when the aisle is not in use.
Equipped with drive means to move the motorized mobile rack device
A movement control device provided on the wall portion.
Non-contact between entering and exiting the passage formed between moving racks
Detecting means for detecting the state, and a progress detected by the detecting means.
Movement forming the passage according to the state of entry and exit
A movement determining means for determining movement of the rack and prohibition of movement.
Comprising, based on the determination of the movement determining means,
The drive means controls the electric movable rack device
The detecting means is disposed in a substantially horizontal direction and outputs two output signals when a signal to be received is blocked by the ingress and egress. And a transmission unit disposed opposite to the reception unit for transmitting a signal to the reception unit, and a time difference from a point in time when one of the output signals output from the respective reception units disappears to a point in time when the remaining one disappears. A movement discriminating unit that discriminates entry and exit based on the signal, and a calculation unit that calculates the difference between the number of times of entry and exit from the passage based on a signal output from the movement determination unit. Ageruko what calculation unit consisting of a set / reset section for outputting a signal for permitting the movement of the moving rack to the drive means when the difference extending is 0
Can be.

[0007]

With this structure, the detecting means detects the entry and exit of the passage between the moving racks in a non-contact state, and the movement determining means detects the movement of the moving rack and inhibits the movement based on the detection result. Is determined, the moving rack can be driven after judging the state of movement into and out of the passage. That is, since the detection means detects both entry into and exit from the passage, it is possible to reliably detect that the passage has been unused or emptied by exiting without operating a special switch or the like when exiting from the passage. be able to.

Further, if the detecting means comprises at least the transmitting section, the receiving section, the forward / backward determining section, and the calculating section, and the movement determining means comprises the above-mentioned set / reset section, Even if the user repeatedly enters and exits the aisle a number of times, it is possible to confirm the presence of the user in the aisle by numerical values, and to determine the movement of the movable rack and the movement prohibition from the numerical values Becomes possible.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The electric movable rack device 100 is formed by mounting a plurality of movable racks 2 on a rail 1 laid on a floor F so as to be able to come and go from each other.

Each of the movable racks 2 has a form which can be used as a bookshelf having openings on both sides in the moving direction. A top plate 22 and a bottom plate 23 are connected to the upper and lower ends of a plurality of columns 21, and an intermediate height between them is provided. A movable rack body 25 is also provided at which a plurality of shelf boards 24 are also installed. A front panel 26 and a rear panel 27 are fixed to the front and rear of the movable rack body 25.

On the side surface 26a of the front panel 26, which is the opposite wall between the movable racks 2, a light emitting unit 31 as a transmitting unit and a light receiving unit 32 as a receiving unit which constitute a detecting unit in the movement control device 3 described later move. In the depth direction of the rack body 25,
At a predetermined distance in a substantially horizontal direction, for example,
Two pieces are attached at a height of about m. The light emitting unit 31 and the light receiving unit 32 are connected to the moving rack 2 adjacent to each other.
, The light receiving unit 32 and the light emitting unit 31 are arranged so as to face each other, that is, the light emitted from the light emitting unit 31 of one moving rack 2 is incident on the light receiving unit 32 of the other moving rack 2. ing. The pair arranged on the front side is the first
A pair of light-emitting portions 31a and first light-receiving portions 32a disposed on the inner side of the moving rack 2 are referred to as a second light-emitting portion 31b and a second light-receiving portion 3.
2b. With such an arrangement, the time difference can be reliably detected regardless of the user's passage position in the passage width direction. A limit switch LS that changes the height and outputs a signal when the adjacent moving rack 2 comes into contact is attached to the upper end of both sides of the rear panel.

Thus, the movable rack 2 is arranged on the rail 1 via the wheels 28 constituting the driving means TM, and can move in the depth direction of the shelf 24 along the rail 1. The wheels 28 are driven by a motor M constituting the driving means TM, and are electrically connected to the movement control device 3 installed adjacent to the electric movable rack device 100. The driving means TM includes a wheel 28, a motor M rotatable in a forward direction and a reverse direction, and a driving unit 33 described later.
It is composed of Each movable rack 2 includes a movable rack body 2
5 is connected by a connecting arm 29 which can be bent at the upper part. The connecting arm 29 has a built-in electric wiring, and sends a signal necessary for control output from the light receiving unit 31 to the movement control device 3. doing.

The movement control device 3 of this embodiment includes a motor M
Comprising: a drive unit 33 for controlling power supply to the movable rack 2; and a plurality of operation switches 34a provided corresponding to the movable rack 2 and instructing movement of the movable rack 2 corresponding to the drive unit 33 when operated. Switch unit 34, first and second light emitting units 31a and 31b and first and second light receiving units 32a and 32b attached to movable rack 2, and output signals output from first and second light receiving units 32a and 32b Advancing / retreating discriminator 35 for discriminating entry and exit from a time difference Td from the time when one of the two disappears to the time when the other disappears,
A case where the difference calculated by the calculation unit 36 constituting the movement determination means TD and the calculation unit 36 which calculates the difference between the number of times of entry and exit from the passage based on the signal output from the movement determination unit 35 is 0 And a set / reset unit 37 for outputting a signal for permitting the movement of the moving rack 2 to the driving means 33. That is, in this embodiment, as shown in FIG. 4, two pairs of the light emitting unit 31 and the light receiving unit 32, the forward / backward determining unit 35, the calculating unit 36, the set / reset unit 37, The drive unit 33 and the operation switch unit 34 are provided as one set. The forward / backward discriminating unit 35, the computing unit 36, and the set / reset unit 37 are commonly used in each movable rack 2, and the output signal from the light receiving unit 32 and the reset signal from the set / reset unit 37 are transmitted to the operation switch unit 34. An operation switch 3 corresponding to the operated moving rack 2
It may be configured so that it is switched in synchronization with 4a and input to the next stage.

The driving unit 33 is provided with, for example, a semiconductor switching element, and determines whether the rotation is forward or reverse according to the moving direction by a limit switch that is turned on of the moving rack 2 forming the passage C. When the interlock for prohibiting the movement of the moving rack 2 is reset, power is supplied to the target motor M in accordance with the operation of the corresponding operation switch 34a of the moving rack 2. The driving unit 33 may use a relay instead of a semiconductor switching element, or may be a combination of both. Operation switch 3
The control unit 4 includes, for example, an illuminated push button switch and a control circuit that self-holds a contact signal so as to be electrically resettable. The push button switch is turned off when the interlock is set and turned on when reset, and the self-hold is reset by a limit signal. Examples of the control circuit include a latch (D flip-flop) circuit.

Each of the first and second light emitting portions 31a and 31b includes, for example, a light emitting diode that emits infrared light, and constantly emits infrared light. In addition, the first and second light receiving units 32a and 32b are configured to include a phototransistor that outputs an output signal when incident infrared light is blocked. The forward / backward discriminating unit 35 compares the first output signal output from the first light receiving unit 32a with the second output signal output from the second light receiving unit 32b, and outputs the output signal that disappeared earlier and the output signal that disappeared later. And a circuit for discriminating entry and exit based on the time difference Td and respective output signals, and outputting an entry flag and an exit flag. In this case, it is not necessary to measure the actual time difference Td from the time when one output signal disappears to the time when the other output signal disappears, and it is sufficient to detect the existence of the time difference Td. When it is determined that the vehicle has entered the vehicle, an entry flag is output to the arithmetic unit 36. When it is determined that the vehicle is leaving the vehicle, an exit flag is output. The entry flag and the exit flag are represented by, for example, 2-bit data.

The arithmetic unit 36 temporarily stores the entry flag and the exit flag output from the advance / retreat determination unit 35 each time the entry flag is entered. If the entry flag is an entry flag, the computation result stored up to that point is stored. And a storage circuit for storing the obtained operation result as an operation result in place of the previous operation result, and storing the obtained operation result in the storage circuit. The latest calculation result is output to the set / reset unit 37. The set / reset unit 37 includes a circuit that determines a numerical value of a calculation result output from the calculation unit 36 and that determines a contact signal from the limit switch LS. When it is determined that the numerical value of the calculation result is 0, a reset signal for releasing the interlock of the moving rack 2 forming the passage C is output to the driving unit 33, and the moving rack 2 After the movement is completed, that is, the moving rack 2 adjacent to the moving direction
Outputs a set signal to set the interlock when touching. The output of the reset signal is performed based on the numerical value of the operation result. If the numerical value of the operation result becomes 1 or more again after outputting the reset signal, the reset signal disappears at that point, and the interface of the corresponding moving rack 2 is output. The lock works again.

The operation when a desired moving rack 2 is moved and a passage C is formed between the moving rack 2 and the adjacent moving rack 2 in such a configuration will be described. First, moving rack 2
Is performed by operating (pressing) the corresponding operation switch 34a of the operation switch unit 34. When the operation switch 34a is operated, a corresponding movement signal is input to the drive unit 33. The drive unit 33 supplies forward or reverse power to the motor M of the corresponding moving rack 2 based on the moving signal. When the desired moving rack 2 moves and comes into contact with the moving rack 2 in the moving direction, the limit switch L
When S is activated, the set / reset unit 37 outputs a set signal to the drive unit 33, and the interlock functions.
In this state, the moving rack 2 forming the passage C is in a state where movement is prohibited.

Next, when the user starts to enter the passage C, the infrared light emitted from the first light emitting section 31a is first blocked by the user's body, and does not reach the first light receiving section 32a. Next, the infrared light from the second light emitting unit 31b is cut off with a delay from the cutoff timing, and the second light receiving unit 3b
2b. Thereafter, when the user completely enters the passage C, re-light reception is started in the order of the first light receiving unit 32a and the second light receiving unit 32b. At this time, as shown in FIG. 5, the first output signal rises first, and the second output signal rises later. Then, similarly, the first output signal falls (disappears) in the order of the second output signal. Therefore, between the time when the first output signal falls and the time when the second output signal falls, a time delay corresponding to the approach speed of the user, that is, a time difference Td occurs. When the first and second output signals are input to the forward / backward determination unit 35,
It detects which output signal has disappeared first and the time difference Td has occurred, and outputs an entry flag or an advance / retreat flag based on the result. That is, if the first output signal has disappeared first, it is determined that the user has entered the path C, and an entry flag is output, and if the second output signal has disappeared first, an advance / retreat flag is output.

The operation unit 36 adds 1 to the stored operation result when the entry flag is input from the entry / exit discrimination unit 35, and subtracts 1 when the exit flag is input. For example, when the user continuously enters the passage C, the entry flag is continuously input, and the calculation result increases by the number of the entry flags. Then, when there is a withdrawal, the number of times of withdrawal is adjusted from the operation result stored at that time. The set / reset unit 37 does not output a reset signal but outputs a set signal when the operation result output from the operation unit 36 is a numerical value other than 0. Therefore, the drive unit 33 continues to be in the state where the interlock is applied by the limit switch LS, and does not energize the motor M of the movable rack 2. On the other hand, while the operation result from the operation unit 36 is 0, the set / reset unit 37 outputs a reset signal to the drive unit 33. Drive unit 33
Releases the interlock by receiving the reset signal. If the operation switch 34a is operated during this time, the movable rack 2 corresponding to the operation switch 34a is driven.

As described above, at the entrance of the passage C, the approach and the exit are detected in a non-contact manner based on the timing difference (time difference Td) at which the two infrared lights are cut off. The number of users (number of people) and the number of exits (number of people) are added and subtracted to detect the number of users existing in the passage C, and a reset signal is output when the number of users becomes zero. The person does not need to perform any operation when exiting the passage C, and the interlock is released. For this reason, even if a plurality of users repeatedly enter and exit the passage C a plurality of times, the user forgets to perform the operation when leaving, is left in an interlocked state, and wants to move the movable rack 2. The inconvenience of being unable to do so does not occur. In addition, since the interlock is reliably released after detecting that there is no user in the passage C, it is possible to prevent an accident that the user is locked in the passage C beforehand.

The present invention is not limited to the embodiment described above. For example, the above-mentioned forward / backward determination unit 35
The calculation unit 36, the set / reset unit 37, and the operation switch unit 34 may be realized by a computer system including a microcomputer. In such a computer system, the output signal from the light receiving section 32 and the set / reset signal output from the set / reset section 37 are switched in accordance with the moving rack 2 forming the passage C, and are respectively switched next. What is necessary is just to comprise so that it may input to a row | line. In this case, the control procedure in the microcomputer includes the following.

(1) When the power is turned on, the initial value of the operation result is set to 0
And store it.

(2) In response to the operated switch 34a, a signal is output to the drive unit 33 to start energizing the motor M of the corresponding moving rack 2.

(3) An interlock set signal is output to the drive unit 33 when the limit switch LS of the moved movable rack 2 is operated.

(4) The output signal input from each light receiving section 32 is detected earlier.

(5) The time difference Td from the disappearance of the previously input output signal to the disappearance of the subsequently input output signal is detected.

(6) It is determined whether to enter or exit from the detected time difference Td. If the result of the determination is ingress, the calculation result is incremented; if the result is exit, the value is decremented.

(7) The operation result is checked. If the numerical value is 0, a reset signal is output, and if it is not 0, a set signal is output.
Output to 3.

(8) When the operation switch 34a is operated during the output of the reset signal, the above-mentioned item (2) is executed.

The light emitting section 31 is formed as one light receiving section 32.
May be disposed so as to face the light emitting unit 31 so that parallel light is incident. In addition, as the receiving unit, in addition to the phototransistor that receives the infrared beam described in the above embodiment as a light receiving element,
A photoelectric conversion element such as CdS that receives white light and changes its resistance value as a light receiving element, a light receiving element capable of receiving a laser beam, and a microphone that receives an ultrasonic wave; Is also good. Correspondingly,
The transmission unit may be configured by a light source using an incandescent bulb, a laser oscillation device, and an ultrasonic oscillation device corresponding to each of the above.

Further, with respect to the mounting positions of the receiving unit and the transmitting unit, one pair is formed by the front panel 26 of the movable rack body 25.
And the remaining pair may be provided on the front wall portion of the shelf board 24 at a distance in the horizontal direction. Further, since the receiving unit and the transmitting unit are provided so as to be able to advance and retreat from the rear of the moving rack 2 on the side surface of the rear panel 27, the receiving unit and the transmitting unit may be provided in the same manner as the layout of the front panel 26. Good.

In addition, the configuration of each section is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0034]

As described in detail above, the present invention detects entry and exit into and out of a passage in a non-contact manner, and moves and inhibits movement of a moving rack forming a passage in accordance with the state. Is determined, the movement prohibition can be automatically canceled, and the situation in which the movement becomes impossible even though the passage is not used can be reliably avoided. Moreover, by counting the number of times of entry and exit (number of people) and confirming the users in the passage, it is possible to more reliably avoid immobility and prevent accidents in the passage. It becomes possible to do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a rear view showing the rear front of the moving rack of the embodiment.

FIG. 3 is an essential part perspective view showing an enlarged attachment position of a light emitting unit and a light receiving unit of the embodiment.

FIG. 4 is a block diagram showing the configuration of the movement control device of the embodiment.

FIG. 5 is a timing chart of an output signal output from the light receiving unit of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rail 2 ... Moving rack 3 ... Movement control device 31 ... Light emitting part 32 ... Light receiving part 33 ... Drive part 34 ... Operation switch part 35 ... Advance / retreat determination part 36 ... Calculation part 37 ... Set / reset part MT ... Drive means

Claims (2)

(57) [Claims] 1. An electric moving rack apparatus comprising a plurality of moving racks mounted on a rail so as to be able to contact and separate from each other, wherein the moving rack has a wall portion facing a moving rack adjacent to the moving rack. A movement control device that is electrically connected and includes a driving unit that moves a moving rack to a desired position when a passage formed between the moving racks is in a non-use state, and controls a motorized moving rack device. Detecting means for detecting entry and exit of a passage formed between movable racks in a non-contact state provided on the wall surface portion, and detecting the passage in accordance with a state of the entry and exit detected by the detection means. to form a result was provided by the movement of the moving rack and the movement determining means for determining a movement inhibition, so that the drive means controls the electric moving rack device based on the determination of the movement determining means
And the difference between the number of times of entering and exiting the passage is 0
In some cases, the moving rack is allowed to move.
Movement control device of the electric moving rack apparatus characterized by the. 2. A plurality of rails which are mounted on a rail so as to be capable of coming and going from each other.
Number of mobile racks, mobile racks adjacent to each other
Motorized moving rack having a wall surface facing the moving rack
Connected between the racks, which are electrically connected to
The mobile rack to the desired position when the
With a driving means for moving the
A movement control device for controlling, provided on the wall portion.
Access to and exit from the passage formed between the mobile racks.
Detecting means for detecting in a contact state;
The passage is formed according to the state of entry and exit
Movement determining means for determining whether to move the movable rack and prohibit the movement.
And based on the determination of the movement determining means
As the driving means controls the electric movable rack device
In this case, the detecting means may be arranged in a substantially horizontal direction and output two output signals when a signal to be received is interrupted by the ingress and egress, so that two detection means are provided. A receiving unit, a transmitting unit disposed opposite to the receiving unit and transmitting a signal to the receiving unit, and a time from when one of the output signals output from the respective receiving units disappears to when the remaining one disappears. Movement determination means, comprising: a forward / backward determining unit that determines an approach and a leaving based on a time difference between the two; A set / reset unit for outputting a signal for permitting the moving rack to move to the driving means when the difference extended by the arithmetic unit is zero.