JP2730367B2 - Shelf with slide table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf provided with a slide table which can move back and forth between a limit position protruding from a shelf frame and a return limit position retracted into the shelf frame.

[0002]

2. Description of the Related Art Conventionally, as this type of shelf with a slide table, there is one disclosed in Japanese Utility Model Laid-Open No. 2-107337, for example. That is, a pair of left and right guide rails are provided on the shelf frame, and a slide table which is supported and guided by these guide rails via guide rollers and is capable of moving back and forth is provided. A screw shaft is provided on the shelf frame along the extending / retracting direction, and a nut body screwed to the screw shaft is connected to the slide table, and a connection portion with an electric tool is formed at an end of the screw shaft. doing.

According to this conventional example, by connecting a power tool to a screw portion and rotating it forward and backward, the screw shaft rotates and the nut body moves along the screw shaft, and accordingly, the slide table moves. It is guided and guided by the guide rail.

[0004]

However, according to the above-mentioned conventional type, an electric tool is required to move the slide table back and forth. For this reason, in order to move the slide table at a high position from the floor surface back and forth, an operator must ride on a table or the like and operate the power tool with respect to the connection part. There is a danger that the slide tool may fall into contact with the moving slide table or the power tool may drop.

[0005] Further, in order to move the slide table at a low position near the floor surface back and forth, the operator has to crouch on the floor surface and operate the power tool, which is very difficult to operate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shelf with a slide table which can automatically and safely and easily slide out of a slide table without using an electric tool.

[0007]

According to a first aspect of the present invention, there is provided a shelf with a slide table in which a pair of left and right guide rails are disposed on a shelf frame in a front-rear direction. A slide table that is supported and guided via a guide roller is provided.
A drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and a position detecting device for detecting a limit position and a return position of the slide table are provided to instruct the slide table to move back and forth. An operation unit, when the electric motor is driven according to an operation signal of the operation unit, a slow start is performed according to a position detection signal of the position detection device,
A control device for performing a slow stop is provided.

In the shelf with a slide table according to the second invention, a pair of left and right guide rails are disposed on a shelf frame in the front-rear direction, and the slides supported and guided by these guide rails via a plurality of guide rollers. A table is provided, and the slide table is provided with a drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and an overload detecting device for detecting an overload of the electric motor. An operation unit for instructing movement is provided, and a control device for stopping driving of the motor when the overload detection signal of the overload detection device is input when driving the motor in response to an operation signal of the operation unit. It is characterized by the following.

Further, in a shelf with a slide table according to a third aspect of the present invention, a pair of left and right guide rails are arranged on a shelf frame in a plurality of stages in a front-rear direction, and a plurality of guide rails are respectively provided on the pair of left and right guide rails. A slide table supported and guided via rollers is provided, and each of the slide tables has a drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and a position for detecting a return position of the slide table. A detection device is provided, and an operation unit for instructing the slide table to move in and out, and when one slide table is pulled out in response to an operation signal of the operation unit, all slide tables are moved by a position detection signal of the position detection device. After confirming that the slide table is at the return position, a control device for driving the electric motor of the slide table is provided. That.

[0010]

According to the structure of the first aspect of the present invention, by operating the operation unit, the electric motor rotates forward or backward according to an instruction from the control device, the drive roller rotates, and the slide table is moved via the guide roller. The guide rail is supported and guided by the guide rail, and moves forward or backward of the shelf frame. By operating the operation unit in this manner, the slide table can be safely and easily and smoothly moved back and forth. The collapse of the load can be prevented.

Further, according to the configuration of the second invention, by operating the operation unit, the electric motor rotates forward or backward according to an instruction from the control device, the drive roller rotates, and the slide table controls the guide roller. The guide rail is supported and guided by the guide rail, and moves forward or backward of the shelf frame. By operating the operation unit in this manner, the slide table can be safely and easily and smoothly moved back and forth, and at the time of movement, the overload is monitored, and when the overload is detected, the electric motor is stopped. By doing so, it is possible to prevent the motor from burning.

Further, according to the configuration of the third invention, when pulling out one slide table by operating the operation unit, the control device determines that all the slide tables are returned to the return position by the position detection signal of the position detection device. Is confirmed, the electric motor of the slide table is driven, and the target slide table moves forward. In this way, by preventing double pull-out, even if an erroneous operation is performed, another slide table can be newly added to the worker who is carrying in and out the articles with respect to the slide table that has already been pulled out. Accidents such as projecting and colliding can be prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a shelf frame, which connects a pair of left and right front supports 2, a pair of right and left intermediate supports 3, a pair of right and left rear supports 4, and a front and rear space between the supports 2, 3, and 4. And a brace 6 connecting the rear supports 4, a top frame 7 connecting the upper portions of the supports 3 and 4, a lower support 8 connecting the lower portions, and the like. 1 has a pair of left and right guide rails 10 arranged in a plurality of upper and lower stages (three stages in the figure).

As shown in FIGS. 3 and 4, these guide rails 10 are formed in a channel shape, and are disposed in the front-rear direction with their open portions facing each other. Attach brackets 1 to 4 and 4
1,12,13 are connected. And the installation, pillar 2,
After attaching brackets 11, 12, and 13 to 3, 4, a connector pin 14 is passed between them. A rail member 15 is laid on the upper surface of the lower plate portion of both guide rails 10. Inside the guide rail 10, a front stopper plate 16 and a rear stopper plate 17 made of, for example, urethane rubber are provided at front and rear ends.

A slide table 20 located between the two guide rails 10 has guide rollers 21 supported and guided by rail members 15 on both sides at the rear.
Side guide rollers 22 and 23 guided on the inner surface of 10A are provided on both sides of the rear part and both sides of the middle part. Also slide table
A drive roller 24 supported and guided by the rail member 15 and rotatable in the front-rear direction, and a DC-type electric motor 25 for driving the drive roller 24 are provided on both left and right sides in the middle of the unit 20. The electric motors 25 are mounted on the slide table 20 via mounting brackets 26, and the drive rollers 24 are directly connected to the drive shafts 27, respectively.
28 is a cover for covering the electric motor 25.

A pair of front and rear magnetic proximity switches 30 and 31 are provided on the lower surface of one guide rail 10, and a magnet 32 is provided on the rear end of the lower surface of the slide table 20. The magnet 32 constitutes a position detecting device. Here, the front magnetic proximity switch 30 is provided at a position facing the magnet 32 when the slide table 20 is pulled forward and reaches the limit (projection limit) position, and the rear magnetic proximity switch 31 is Table 20 is shelf frame 1
The magnet 32 is inserted when it reaches the return limit (retreat limit) position.
Is provided at a position opposite to the above.

An operation section 33 is provided at an intermediate portion of the front column 2 on either side of the front. As shown in FIG. 5, the operation unit 33 includes a power switch for turning on and off the power.
34, a pilot lamp 35 for displaying the power-on state, an abnormal state of the shelf, a return switch 36 for instructing return of the slide table 20, a shelf No. 1 take-out switch 37 for instructing the first-stage slide table 20 to be pulled out, Shelf No. 2 output switch 3 for instructing pulling out of the second stage slide table 20
8. A shelf No. 1 output switch 39 for instructing the third stage slide table 20 to be pulled out, and an emergency stop switch 40 for instructing an emergency stop of the movement of the slide table 20 are provided.

As shown in FIGS. 3, 4 and 6, on the inner surface of the vertical plate portion 10A of one of the guide rails 10, a pair of insulating trolleys 46 as a power supply device is provided with a hanger 41 and a hanger 41. It is supported by the end cap 42 and provided in the front-rear direction. An insulation trolley feed-in portion 43 is provided at the rear end of the insulation trolley 46, and a lead wire 44 wired outside or in the rear support column 4 is connected to the insulation trolley 46 via a crimp terminal (not shown). ing. The slide table 20
On one side of the rear is a current collector that contacts the insulating trolley 46
29 are provided. One end of a lead wire 45 is connected to these current collectors 29, and the other end of the lead wire 45 is connected to the electric motor.
Connected to 25.

A control unit 50 is provided in the top frame 7. This control unit 50, as shown in FIGS.
A motor DC power supply 51 for driving the motor 25, a controller 52 for the motor 25, a controller DC power supply 53 for the controller 52, a fuse 54 for protecting a power supply circuit, a resistor 55 for dividing a DC voltage to reduce the voltage, And a plurality of relays forming a drive circuit of the electric motor 25.

AC power is supplied to the motor DC power supply 51 and the controller DC power supply 53 via the power switch 34 and the fuse 54 of the operation unit 33. The power converted to DC in the motor DC power supply 51 is supplied to the motor 25. The power supplied to the electric motor 25 via the drive circuit and converted to DC by the controller DC power supply 53 is supplied to the controller 52. When the current supplied to the motor 25 becomes an overcurrent, the motor DC power supply 51 operates the overcurrent detection contact 51A.

As shown in FIGS. 8 and 9, the controller 52 includes a return switch 36 of the operation unit 33, a shelf No. 1 switch 37, a shelf No. 2 switch 38, and a shelf No. 1 switch.
39, and the operation signal of the emergency stop switch 40 are input,
Shelf N for detecting the limit position of the first stage slide table 20
o.1 Return limit magnetic proximity switch 30, a shelf for detecting the return limit position of the first stage slide table 20 No. 1 return limit magnetic proximity switch 31, and a shelf for detecting the return limit position of the second stage slide table 20 No. 2 limit magnetic proximity switch 30, a shelf for detecting the return limit position of the second stage slide table 20, a shelf No. 2 return magnetic proximity switch 31, and a shelf for detecting the limit position of the third stage slide table 20 No. 3 limit magnetic proximity switch 30, shelf N for detecting the return limit position of the third stage slide table 20
o.3 The return limit position of the slide table 20 of the return limit magnetic proximity switch 31 and the return limit position detection signal are input, and the overcurrent detection signal of the motor DC power supply 51 (current detection contact 51A) is input. Further, the controller 52 outputs a drive signal to the pilot lamp 35, and outputs the next drive signal to a plurality of relays forming a drive circuit of the electric motor 25. A forward rotation signal of the motor 25 for pulling out the slide table 20 to the relay CR0, a reverse rotation signal of the motor 25 for inserting the slide table 20 to the relay CR1, a shelf No. 2 selection signal for selecting the drive of the second stage slide table 20 to the relay CR2, Relay C
A shelf No. 3 selection signal for selecting the drive of the third stage slide table 20 is output to R3, and a motor 25 speed switching signal for reducing the moving speed of the slide table 20 is output to the relay CR4.

As shown in FIG. 7, the drive circuit of the electric motor 25 switches the polarity of the direct current and supplies the electric power to the electric motor 25, and switches the speed of the electric motor 25 in order to switch the moving speed of the slide table 20. Speed switching unit 57, and the first
Motor 25, DCM1, DCM of stage slide table 20
1A or the motor 2 of the second stage slide table 20
5, the motor 25 of the slide table 20 of the third stage or the DCM2, DCM2A, and the motor selection unit 58 for selecting the DCM3, DCM3A.

The polarity switching unit 56 includes a contact of a relay CR0 driven by a forward rotation signal of the motor 25 and a contact of a relay CR1 driven by a reverse rotation signal of the motor 25. When the contact of the relay CR0 is turned on, the motor is switched. When a current flows from the selection unit 58 to the motor 25 and the contact of the relay CR1 is turned on, a current flows to the motor selection unit 58 from the motor 25. When a current flows from the motor selection unit 58 to the electric motor 25, the electric motor 25 rotates forward and the slide table 20 is drawn out.

The speed switching section 57 is configured by connecting the contact of the relay CR4 driven by the motor 25 speed switching signal and the resistor 55 in parallel, and when the contact of the relay CR4 operates,
The resistor 55 is inserted into the drive circuit, the voltage applied to the motor 25 is divided, and the motor 25 is decelerated,
The exit speed of is reduced.

The motor selector 58 comprises a contact of a relay CR2 driven by a shelf No. 2 selection signal and a contact of a relay CR3 driven by a shelf No. 3 selection signal. The contact of the relay CR2 is turned on. , The motor 25, DCM2 and DCM2A of the second slide table 20 are selected, and when the contact of the relay CR3 is turned on, the motor 25, DCM3 and DCM3A of the third slide table 20 are turned on.
Is selected, and the contacts of the relay CR2 and the relay CR3 are both turned off, the motor 25, the DCM1, and the DCM1A of the first stage slide table 20 are selected.

The control of the controller 52 will now be described with reference to FIGS.
This will be described according to the flowchart of First, the power switch 34 is turned on, and the AC power is
When the DC power is supplied to the controller 53 and the controller 52 is supplied, the pilot lamp 35 is turned on (step-1), and it is confirmed whether an operation signal of the return switch 36 is inputted (step-2).

When the input of the operation signal of the return switch 36 is confirmed, first, the shelf No. 1 return limit magnetic proximity switch 31 for detecting the return limit position of the first stage slide table 20 is off, that is, the first It is confirmed that the slide table 20 of the step has not returned to the return limit position (step-3), and if not, a return control flowchart shown in FIG. 11 (a) described later is executed (step-4). . Next, a shelf No. 2 for detecting a return limit position of the slide table 20 of the second stage.
It is confirmed that the return limit magnetic proximity switch 31 is off, that is, the second stage slide table 20 has not returned to the return limit position (step-5). If not, the return control flowchart is executed (step-5). -6) Then, the shelf N for detecting the return limit position of the third-stage slide table 20
o.3 Whether the return magnetic proximity switch 31 is off,
It is confirmed that the slide table 20 of the step has not returned to the return limit position (step-7), and if it has not returned, the flow chart of the return control is executed (step-8), and the processing ends.

A flowchart of the return control will be described with reference to the flowchart of FIG. First, the timer is reset to start counting (step-A1). During the first two seconds, the relay CR1, the relay CR2, and the relay CR4 are turned on, and the resistor 55 is inserted (for example, 12V).
Then, the electric motor 25 of the second stage slide table 20 and the DCM
2. An electric current is passed from the motor 25 to the motor selection unit 58 through the DCM 2A, the second slide table 20 is slowly started backward, and after 2 seconds, the relay CR4 is turned off.
With the resistor 55 bypassed (for example, 24V), the motor
25, a shelf No. 2 return limit magnetic proximity switch 31 for detecting a return limit position of the second stage slide table 20 by passing a current from the motor 25 to the motor selection unit 58 through the DCM 2 and the DCM 2A.
The second-stage slide table 20 is moved backward at a normal speed until is turned on (step-A2).

During the backward movement, after 2 seconds, a shelf No. for detecting the limit position of the slide table 20 of the second stage.
It is checked whether the second limit magnetic proximity switch 30 is off, that is, whether the second slide table 20 has started the limit position (step-A3), and the shelf No. 2 second limit magnetic proximity switch 30 is checked. , The start failure is determined, the pilot lamp 35 is flickered (step-A4), the relays CR1 and CR2 are both turned off, and the supply of power to the motor 25, the DCM2, and the DCM2A is stopped. That is, the movement of the second-stage slide table 20 is stopped (Step-A5), and the process ends. Also, if the shelf No. 2 return limit magnetic proximity switch 31 for detecting the return limit position of the second stage slide table 20 is not turned on even after 16 seconds have elapsed, that is, even if 16 seconds have elapsed, the second stage If the slide table 20 does not arrive at the return limit position, it is determined that there is an abnormality (step-A6), and steps A4 and A5 for flickering and stopping the pilot lamp are executed, and the process is terminated.

Further, a current detecting contact of the motor DC power supply 51
When the 51A is turned on and the input of the overcurrent detection signal is confirmed (Step-A7), the steps A4 and A5 of the flicker and stop of the pilot lamp are executed to protect the circuit, and the processing is terminated. When the input of the operation signal of the emergency stop switch 40 of the operation unit 33 is confirmed (Step-A8), the stop-Step A5 is executed and the processing ends.

Then, the shelf No. 2 return limit magnetic proximity switch 31 for detecting the return limit position of the second stage slide table 20 is provided.
Turns on (Step-A9), relay C for 0.5 seconds
R4 is turned on, the speed of the motor 25 is reduced with the resistor 55 inserted (step-A10), and the stop step-A5 is executed and the process is terminated.

If the input of the operation signal of the return switch 36 is not confirmed in Step-2 of FIG. 10, it is confirmed whether the operation signal of the shelf No. 1 output switch 37 is input (Step-9). When the input of the operation signal of the shelf No. 1 output switch 37 is confirmed, it is confirmed whether or not the shelf return limit magnetic proximity switches 31 for detecting the return limit positions of all the slide tables 20 are turned on. It is checked whether or not 20 is at the return limit position (step-10). If not, it is checked whether or not the shelf No. 1 return limit magnetic proximity switch 31 for detecting the return limit position of the first slide table 20 is off. That is, it is confirmed whether the first-stage slide table 20 is slightly away from the return limit position (step-11). If not confirmed, the process ends without doing anything. Step-
After the confirmation of steps 10 and 11, a flow chart of the delivery control shown in FIG. 11 (b) to be described later is executed (step-12).

If the input of the operation signal of the shelf No. 1 output switch 37 is not confirmed in step-9, it is checked whether the operation signal of the shelf No. 2 output switch 38 is input (step-13). When the input of the operation signal of the shelf No. 2 output switch 38 is confirmed, all the slide tables 20
It is confirmed whether or not the shelf return limit magnetic proximity switch 31 for detecting the return limit position is ON, that is, whether all the slide tables 20 are at the return limit position (step-14). It is checked whether the shelf No. 2 return limit magnetic proximity switch 31 for detecting the return limit position of the slide table 20 is off, that is, whether the second-stage slide table 20 is slightly away from the return limit position ( Step-1
5) If not confirmed, exit without doing anything. When the steps -14 and 15 are confirmed, the flow chart of the delivery control is executed (step -16).

If the input of the operation signal of the shelf No. 2 output switch 38 is not confirmed at Step-13, it is checked whether the operation signal of the shelf No. 3 output switch 39 is input (Step-17). When the input of the operation signal of the shelf No. 3 output switch 39 is confirmed, all the slide tables 20
It is confirmed whether or not the shelf return limit magnetic proximity switch 31 for detecting the return limit position is ON, that is, whether all the slide tables 20 are at the return limit position (step-18). It is confirmed whether the shelf No. 3 return limit magnetic proximity switch 31 for detecting the return limit position of the slide table 20 is off, that is, whether the third-stage slide table 20 is slightly away from the return limit position ( Step-1
9) If not confirmed, exit without doing anything. Further, when the steps -18 and 19 are confirmed, the flow chart of the dispensing control is executed (step -20), and the process ends.

A flowchart of the dispensing control will be described with reference to the flowchart of FIG. 11 (b), taking the slide table 20 of the second stage as an example. First, the timer is reset to start counting (step-B1). During the first two seconds, the relay CR0, the relay CR2, and the relay CR4 are turned on, and the resistance 55 is inserted (for example, 12 V).
Then, the electric motor 25 of the second stage slide table 20 and the DCM
2, a current is passed from the motor selection unit 58 side to the electric motor 25 to the DCM 2A, the second slide table 20 is slowly started forward, and after 2 seconds, the relay CR4 is turned off.
With the resistor 55 bypassed (for example, 24V), the motor
25, a current is applied to the motor 25 from the motor selection unit 58 side to the DCM2 and DCM2A until the shelf No. 2 limit magnetic proximity switch 30 for detecting the limit position of the second-stage slide table 20 is turned on. 2nd stage slide table at normal speed
Move 20 forward (step-B2).

During the forward movement, after 2 seconds, the shelf N for detecting the return limit position of the second stage slide table 20
o.2 It is checked whether the return limit magnetic proximity switch 31 is off, that is, whether the second stage slide table 20 has started the return limit position (step-B3), and the shelf No. 2
If the return limit magnetic proximity switch 31 remains on, it is determined that the start is defective, the pilot lamp 35 is flickered (step-B4), and both the relay CR0 and the relay CR2 are turned off to the motor 25, the DCM2, and the DCM2A. The power supply to the second stage, ie, the second stage slide table
Stop the movement of Step 20 (Step-B5) and end. Also, if the shelf No. 2 limit magnetic proximity switch 30 for detecting the limit position of the second stage slide table 20 does not turn on even after 16 seconds have elapsed, that is, even if 16 seconds have elapsed, the second stage If the slide table 20 does not arrive at the limit position, it is determined that there is an abnormality (step-B6), and steps B4 and B5 for flickering and stopping the pilot lamp are executed, and the process is terminated.

Further, a current detecting contact of the motor DC power supply 51
When 51A is turned on and the input of the overcurrent detection signal is confirmed (step-B7), in order to protect the circuit, flicker and stop steps B4 and B5 of the pilot lamp are executed, and the processing is terminated. When the input of the operation signal of the emergency stop switch 40 of the operation section 33 is confirmed (step-B8), the stop step-B5 is executed and the processing is terminated.

When the shelf No. 2 limit magnetic proximity switch 30 for detecting the limit position of the second stage slide table 20 is turned on (step-B9), the relay CR4 is set for 0.5 seconds.
Is turned on, and the motor 25 is set in a state where the resistor 55 is inserted.
After decelerating the speed (step-B10), the stop step-B5 is executed and the processing ends.

Under the control of the controller 52, when the operator first turns on the power switch 34, the pilot lamp
When the 35 is turned on and the second slide table 20 is pulled out, for example, when the shelf No. 2 take-out switch 38 is operated, all the slide tables 20 are at the return limit position or the second slide table 20 is slightly moved. However, if the return limit is left, a current flows in the forward direction to the motor 25, the DCM2, and the DCM2A, and the second-stage slide table 20 slowly starts from the return limit position and changes to the normal speed after 2 seconds. When it reaches the limit position, it slows down and is automatically pulled out. When the operator operates the return switch 36 to insert the slide table 20, the motor 2
5. A current flows in the reverse direction to DCM2 and DCM2A, and the second-stage slide table 20 slowly starts from the limit position, moves to the normal speed after 2 seconds, and moves to the normal limit position. And inserted automatically. When a current flows through the pair of left and right electric motors 25, the motors 25 are driven synchronously, and the driving rollers 24 are rotated in conjunction with the driving, and the slide table 20 is moved through the guide rollers 21 and the side guide rollers 22, 23. The slide table 20 is stopped at the limit position where the front side guide roller 23 is in contact with the front stopper plate 16 when the slide table 20 is pulled out. The rear side guide roller 22 stops at the return limit position where it comes into contact with the rear stopper plate 17. Further, as the slide table 20 moves back and forth, the current collector 29 slides in the front-rear direction while being in contact with the insulating trolley 50, and can supply power to the pair of left and right electric motors 25. Drive synchronously.

If the switch does not start for 2 seconds even if the switch is operated, or if the movement does not end after 16 seconds, or if an overcurrent flows, the pilot lamp 35 flickers. , Motor 25, DCM2,
When the power supply to the DCM 2A is stopped, the movement is stopped, and the emergency stop switch 40 is operated, the motor 25, the DCM
2. The power supply to the DCM 2A is stopped, and the movement stops.
When the power switch 34 is turned off, all operations stop,
The pilot lamp 35 goes out.

As described above, except when the target slide table 20 is pulled out to some extent, when all the slide tables 20 are at the return limit position, the drawers can be pulled out. Even in the case of an erroneous operation, it is possible to prevent an accident in which another slide table 20 newly protrudes and collides with a worker who is carrying in and out an article with respect to the slide table 20 that has already been pulled out. In addition, since protection against overload during movement is performed by detecting the overcurrent or detecting the position of the slide table 20 based on the timer time, accidents such as burnout of the electric motor 25 can be prevented, and slow start and slow stop are executed. Therefore, collapse of the load on the slide table 20 can be prevented.

In the above-described embodiment, the type in which the pair of left and right electric motors 25 are synchronously driven to move the slide table 20 out and back is shown. However, in this embodiment, only one motor 25 is provided and the slide table 20 is moved out and back. It may be. In the above-described embodiment, the operation unit 33 is provided in the middle of the front surface of the front support column 2. However, the operation unit 33 may be provided on the front surface of the slide table 20 or on an operation device separately provided outside the shelf.

[0043]

According to the first aspect of the present invention, the slide table can be automatically and safely and easily and smoothly moved back and forth by operating the operation unit. Slow start and slow stop of the motor can prevent the load on the slide table from collapsing.

According to the configuration of the second aspect of the present invention, by operating the operation unit, the slide table can be automatically and safely and easily and smoothly moved back and forth. By monitoring the load and stopping the motor at the time of overload, it is possible to prevent burnout of the motor.

Further, according to the configuration of the third aspect of the present invention, when one slide table is pulled out by operating the operation unit, the control device returns all the slide tables by the position detection signal of the position detection device. By driving the motor of the slide table after confirming that the slide table is at the position, double pull-out can be prevented, and therefore, even if an erroneous operation is performed, articles can be taken in and out of the slide table that has already been pulled out. It is possible to prevent an accident in which another slide table newly protrudes and collides with the worker who is performing the work.

[Brief description of the drawings]

FIG. 1 is a side view of a shelf with a slide table according to an embodiment of the present invention.

FIG. 2 is a front view of the shelf with a slide table.

FIG. 3 is an enlarged plan view of a main part of the shelf with a slide table.

FIG. 4 is a view taken in the direction of arrows AA in FIG. 3;

FIG. 5 is a front view of an operation unit of the shelf with the slide table.

FIG. 6 is a view taken in the direction of arrow BB in FIG.

FIG. 7 is a power supply and motor drive circuit diagram of the shelf with the slide table.

FIG. 8 is an input / output signal diagram of a controller of a controller of the shelf with the slide table.

FIG. 9 is a wiring diagram of the shelf with the slide table.

FIG. 10 is a flowchart of a controller of a control unit of the shelf with the slide table.

FIG. 11 is a flowchart of a controller of a control unit of the shelf with the slide table.

[Explanation of symbols]

 1 Shelf frame 10 Guide rail 20 Slide table 21 Guide roller 24 Drive roller 25 Electric motor 29 Current collector 30 Magnetic proximity switch (exit limit position) 31 Magnetic proximity switch (return limit position) 33 Operation section 51A Overcurrent detection contact 52 Controller

Claims (3)

(57) [Claims] 1. A pair of left and right guide rails are disposed on a shelf frame in a front-rear direction, and a slide table supported and guided by a plurality of guide rollers is provided on these guide rails.
The slide table is provided with a drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and a position detection device for detecting a limit position and a return position of the slide table. An operation unit for instructing retreat, and a control device for slow start and slow stop according to a position detection signal of the position detection device when driving the electric motor in response to an operation signal of the operation unit are provided. Shelf with slide table. 2. A pair of left and right guide rails are disposed on a shelf frame in a front-rear direction, and a slide table supported and guided via a plurality of guide rollers is provided on these guide rails.
The slide table is provided with a drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and an overload detecting device for detecting an overload of the electric motor. An operation unit for instructing, and a control device for stopping driving of the motor in response to an overload detection signal of the overload detection device when driving the motor in response to an operation signal of the operation unit is provided. Shelf with slide table. 3. A pair of left and right guide rails are arranged on a shelf frame in a plurality of stages in the front-rear direction, and each of the pair of left and right guide rails has a slide table supported and guided via a plurality of guide rollers. A drive roller rotatable on the guide rail, an electric motor interlocked with the drive roller, and a position detecting device for detecting a return position of the slide table, provided on each of the slide tables. When pulling out one slide table in response to an operation unit instructing the movement and an operation signal from the operation unit, it is confirmed that all the slide tables are at the return positions by the position detection signal of the position detection device. A shelf with a slide table, comprising a control device for driving the electric motor of the slide table.