JP2000062980A - Method of taking one from stacked boards and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take one from stacked boards easily and automatically for carrying them in a board processing device. SOLUTION: This device lifts a board W using the magnetic force of a work attracting device 3 and measures the weight of the attracted board W using a board weight detector 9. If the detected weight by the board weight detector 9 at the time of attracting and lifting the board W using an initial magnetic force setting value As capable of lifting one board W is lower than a two-piece lifting determining weight setting value Cs equal to the weight determined as the one sufficiently exceeding the weight of one board, it is determined as one board W attracted. If the detected weight is equal to or higher than the two-piece lifting determining weight setting value Cs, it is determined as two or more boards W lifted. At this time, a separating process is performed so that the energization of the work attracting device 3 may be temporarily cut off and started again. After the separating process, if the detected weight is lower than the two-piece lifting determining weight setting value Cs, it is determined as one board W attracted, and if the detected weight is equal to or higher than the two-piece lifting determining weight setting value Cs, it is determined as two or more boards W lifted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for taking a single sheet of laminated plate material.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, when plate materials W are stacked on a pallet P, after the uppermost plates of the stacked plate materials W are separated one by one, for example, It is carried into the work table of a plate material processing machine such as a band saw, punch press, or laser processing machine.

Since rust preventive oil or the like is applied to the surface of the plate material W for rust prevention, the plate materials W cannot be easily separated from the uppermost plate of the loaded plate materials W one by one. A wedge 101 is driven between the uppermost plate of the plate material W and the lower layer plate W to make a gap between them, and the uppermost plate material W is hooked with a wire and carried into a plate material processing machine by a crane (not shown).

[0004]

By the way, in the conventional method for taking a single sheet of a laminated plate, since it is a manual work, it is impossible to automatically and continuously carry it into the sheet material processing machine.
Since it is not easy to drive the wedges 101 between the plate materials W, there has been a problem that it takes a long time to take one plate material W and to carry in the plate material carry-in process.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a stacking plate which can automatically and efficiently take one sheet from a stacked sheet material and carry it into a sheet material processing machine. An object is to provide a single-piece taking method and its apparatus.

[0006]

In order to achieve the above object, a method for picking up one sheet of a laminated sheet material according to the present invention according to claim 1 is to lift the sheet material by a work suction device and detect the weight of the sheet material adsorbed by the sheet material weight detection. If the weight detected by this device and the weight detected by this material weight detection device is sufficient to determine that the weight of one plate material is sufficiently exceeded, one plate material is used if it is less than the two-piece hanging judgment weight set value. Is adsorbed, and if the detected weight is equal to or more than the two-piece hanging determination weight set value, it is determined that two or more plate materials are hoisted.

Therefore, the two-piece hanging judgment weight set value corresponding to the weight at which it can be judged that the weight detected by the plate material weight detecting device when the plate material is lifted by the work suction device is sufficiently over the weight of one plate material. In the above case, it can be seen that two or more plate materials have been lifted up, so they cannot be loaded into the plate material processing machine. However, when the detected weight is less than the two-piece hanging judgment weight set value, one plate is reliably taken and the plate material is removed. It is delivered to the processing machine.

According to a second aspect of the present invention, there is provided a single-layered sheet material picking method according to the first aspect of the present invention, wherein when it is determined that two or more sheet materials have been lifted, it is a work suction device. Is temporarily shut off and re-adsorbed, the work detecting device detects the plate material after this separation process, and 1 if the weight detected by the plate material weight detecting device is less than the two-sheet hanging judgment weight set value. It is characterized in that it is determined that one plate material is adsorbed, and if the detected weight is equal to or more than the two-piece hanging determination weight set value, it is determined that two or more plate materials have been lifted.

Therefore, when the work detecting device detects that the plate material is adsorbed after the separation processing, for example, only one plate material sticks to the work adsorbing device and another plate material falls, or two plate materials fall. This is a case where the above plate materials are still attached to the work suction device without being separated. At this time, when the weight detected by the plate material weight detection device is equal to or more than the two-sheet hanging judgment weight set value corresponding to the weight at which it can be determined that the weight of one plate material is sufficiently exceeded,
Since it can be seen that two or more plate materials have been lifted, they cannot be loaded into the plate material processing machine. However, if the number of plates is only one due to the separation process, the detected weight is less than the two-piece hanging judgment weight set value. It is taken and carried into the plate material processing machine.

According to a third aspect of the present invention, there is provided a single-layered sheet material taking method according to the second aspect, wherein it is determined that two or more sheet materials have been lifted after the separating treatment. Alternatively, when the work detection device does not detect the plate material, the work suction device is lowered and the suction force set value for the two-sheet hanging detection, which is less than the suction force before the separation process, is changed to the suction value for the two-sheet hanging detection. When the plate weight is lifted again with the force setting value and the detected weight is less than the two-piece hanging judgment weight set value, it is judged that one plate material has been adsorbed, and the detected weight is the two-piece hanging judgment weight set value or more. In this case, it is characterized in that it is judged that two or more plate materials are lifted and the separation process is performed again.

Therefore, when two or more plate materials are still lifted after the separation processing or when the work detection device does not detect the plate materials, the attraction force set value at the time of two-piece hanging detection which is reduced from the attraction force before the separation processing. Since it is sucked again by the work suction device and lifted, one sheet may be picked up. In this case, it is surely decided that one sheet has been picked up and the sheet is carried into the plate processing machine. Even if two or more sheets are lifted, the separation process is performed again and the sheets are separated. Even so, even if they are not separated as usual, it is judged that two or more sheets have been lifted, so they are not carried into the plate material processing machine.

According to a fourth aspect of the present invention, there is provided a single-layer picking device for a stacked plate material. A device, and an elevating and lowering device for elevating and lowering the work suction device through the plate material weight detection device,
A work detecting device for detecting the presence or absence of a work to be adsorbed by the work adsorbing device, and two pieces of hanging weight corresponding to a weight at which the weight detected by the plate weight detecting device can be judged to sufficiently exceed the weight of one plate material. If it is less than the judgment weight set value, it is judged that one plate material has been adsorbed, and if the detected weight is the two-piece hanging judgment weight set value or more, it is judged that two or more plate materials are lifted. And a control device provided with a determination device.

Therefore, it is similar to the operation of claim 1, and it can be judged that the weight detected by the plate material weight detection device when the plate material is lifted by the work suction device is sufficiently over the weight of one plate material. If it is equal to or greater than the set value for determining the two-sheet hanging weight, which is equivalent to the weight, it can be seen that two or more plate materials have been lifted, so it is not carried into the plate material processing machine, but the detected weight is less than the two-piece hanging judgment weight set value. In this case, one sheet is surely taken and carried into the plate material processing machine.

According to a fifth aspect of the present invention, there is provided a single-layered sheet material picking device according to the present invention, wherein the controller determines that two or more sheet materials have been lifted. In this case, a separation process command for temporarily shutting off the work suction device and re-sucking is generated, and after this separation process command, the plate material is detected by the work detection device and the weight detected by the plate material weight detection device is the two-piece hanging determination weight. If it is less than the set value, it is determined that one plate has been adsorbed, and if the detected weight is greater than or equal to the set value for determining whether to suspend two plates, it is determined that two or more plates have been lifted. It is characterized by comprising.

Therefore, the operation is the same as that of claim 2, and when the work detecting device detects that the plate material is adsorbed after the separation processing, for example, only one plate material sticks to the work adsorbing device. If another plate falls,
Alternatively, it is a case where two or more plate materials are stuck to the work adsorption device without being separated. At this time, the weight detected by the plate weight detection device is equivalent to the weight at which it can be determined that the weight of one plate has been sufficiently exceeded.
If the weight exceeds the set value for the hanging judgment, it can be seen that two or more plates have been lifted, so it cannot be loaded into the plate processing machine, but if there is only one due to the separation process, the detected weight will be two. Since it is less than the judgment weight set value, one sheet is reliably taken and loaded into the plate processing machine.

According to a sixth aspect of the present invention, there is provided the single-layered sheet material picking device according to the fifth aspect, wherein the control device lifts two or more sheet materials after the separating process. If it is determined that the work detection device does not detect the plate material, the work adsorption device is lowered and the adsorption force set value at the time of two-sheet hanging detection, which is less than the adsorption force before the separation process, is changed. When the plate weight is lifted again with the suction force setting value at the time of detecting the two-sheet suspension, and when the detected weight is less than the two-sheet suspension determination weight set value, it is determined that one sheet material is adsorbed, and the detected weight is the above-mentioned. Two
The present invention is characterized by comprising a comparison / judgment device for judging that two or more plate materials have been lifted when the sheet hanging judgment weight set value is equal to or more, and again issuing the separation processing command.

Therefore, the operation is similar to that of claim 3, and when the two or more plate materials are still lifted after the separation processing or when the work detection device does not detect the plate materials, the attraction force before the separation processing is reduced. 2
When picking up a single piece, it may be picked up once because it is picked up again by the work suction device at the set suction force and lifted.
In this case, it is surely determined that one sheet has been taken, and the sheet is carried into the plate material processing machine. Even if two or more sheets are lifted, the separation process is performed again and the sheets are separated. Even so, even if they are not separated as usual, it is judged that two or more sheets have been lifted, so they are not carried into the plate material processing machine.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for taking a single sheet of a laminated plate and an apparatus thereof according to the present invention will be described below with reference to the drawings.

The single-layering apparatus for stacking plate materials according to the present embodiment is, for example, a plate material loaded on a pallet P for loading on a work table of a plate material processing machine such as a band saw, a punch press or a laser processing machine. 1 in advance
It is to separate and lift each sheet.

Referring to FIGS. 2 and 3, in the single-layering device 1 for stacking plate materials, for example, a magnet 3 as an example of a work suction device for suspending the plate material W is a piston of an ascending / descending cylinder 5 as an ascending / descending drive device. It is provided below the rod 7 via, for example, a load cell 9 as a plate weight detecting device for measuring the weight of the plate W.

The magnet 3 can switch the magnetic force as an attracting force to ON / OFF and can adjust the magnetic force through an exciting switch 11 (see FIG. 6). A load cell 9 is fixed to the upper portion of the magnet 3 with a bolt 15 via a rod-shaped magnet support member 13. A load cell holding body 19 is provided below the piston rod 7 of the lifting cylinder 5 through a flat plate-shaped flange member 17, and the load cell holding chamber 23 provided in the load cell holding body 19 is provided with a load cell. 9 is held so that it can be raised and lowered.

Since the upper surface of the flange member 17 is provided with a guide post 21 which is vertically guided by a guide member (not shown) provided on the side wall of the elevating cylinder 5, the piston rod 7 and the load cell holding member are held. The body 19 moves up and down without rotating horizontally.

The upper side surface of the load cell 9 is shown in FIG.
Further, as shown in FIG. 4, a key groove 25 is provided extending in the vertical direction, and a guide pin 27 fitted in the key groove 25 is provided on the inner wall surface of the load cell holding chamber 23 so as to project therefrom. Therefore, the load cell 9 is vertically guided through the guide pin 27 and the key groove 25, and is vertically movable without rotating in the horizontal plane.

Therefore, the magnet 3 is freely suspended in the load cell holding chamber 23 by the load cell 9 via the magnet supporting member 13.

Between the magnet support member 13 and the magnet 3, for example, an L-shaped work detection LS bracket 29 is provided as shown in FIGS. 2 and 5, and this work detection LS bracket is provided. For example, a work detection LS31 as a work detection device for detecting the presence or absence of the plate material W attracted by the magnet 3 at the tip of the bracket 29.
A (limit switch) is provided so as to slightly project from the lower end surface of the magnet 3.

Further, as shown in FIG. 3, a pressing confirmation bracket 33 is provided on the outer wall surface of the load cell holder 19, and the lower end surface of the magnet 3 is located at the lower end of the pressing confirmation bracket 33. LS35 for pressing confirmation for detecting that the plate has contacted the plate material W on the pallet P
A (limit switch) is provided, and a slight gap is provided between the tip of the pressing confirmation LS 35 and the upper end surface of the magnet 3.

With the above construction, when the magnet 3 is lowered by the operation of the lifting cylinder 5 and the lower end of the magnet 3 comes into contact with the uppermost plate material W on the pallet P, the load cell 9 is loaded.
Is brought into a state of being lifted in the load cell holding chamber 23, and the load cell holding body 19 is lowered, so that the pressing confirmation LS 35 comes into contact with the magnet 3 via the pressing confirmation bracket 33 to be turned on.

When the lower end of the magnet 3 comes into contact with the plate material W on the pallet P as described above, the work detecting LS is performed.
31 is also pressed by the plate material W to be in the ON state,
Since a changeover switch (not shown) is provided in the circuit connected to the work detecting LS31, even if the work detecting LS31 is pressed by the plate W, it is turned off by changing the changeover switch to turn off the work detecting LS31. O
It is configured so that N / OFF can be controlled.

The magnet 3, the load cell 9, the work detection LS, and the pressing confirmation LS 35 described above are electrically connected to the CPU as the control device 37.

Referring to FIG. 6, the controller 37 controls the CP
The U38 is provided, and the CPU 38 is provided with an input device 3 for inputting various data for taking one sheet from the laminated plate material.
9 and a display device 41 are provided.

As various input data, the ratio A (%) to the plate material W to be taken as a single sheet for calculating the initial magnetic force setting value As capable of lifting one plate material W and the magnet 3 are initially set. Target plate material W excited by the magnetic force setting value As
Rise standby setting time B (second) for holding the magnet 3 for a predetermined time to stand by after adsorbing the magnet, and the two-sheet hanging judgment weight setting corresponding to the weight at which it can be determined that the weight of one plate material is sufficiently exceeded The ratio C (%) to the target plate material W for calculating the value Cs and the magnetic force set value Ds when the work piece falls to be attracted again by increasing the magnetic force when the plate material W drops even if attracted by the magnet 3 are set. In order to do so, the magnetic force of the magnet 3 is reduced when the ratio D (%) to the magnetic force at the time of dropping and the lifting detection weight of the plate material W is adsorbed at a value equal to or more than the above-mentioned two-sheet hanging judgment weight set value Cs. In order to set the two-suspension detection magnetic force setting value Es to be adsorbed again, the ratio E (%) to the magnetic force at that time and the lifting detection weight of the plate material W are equal to or more than the above-mentioned two-suspension determination weight setting value Cs. Adsorbed by value Separation set time F to re-energized after interrupting temporarily energized magnet 3 to Rutoki
(Seconds), etc. are entered.

In the control device 37, for example, a memory 43A for storing the above-mentioned ratio A (%), a memory 43C for storing the ratio C (%), as a memory for storing the various input data. A memory 43D that stores the ratio D (%), a memory 43E that stores the ratio E (%), and the like are provided. Further, for example, a timer 4 for turning off the rising of the magnet 3 after the rising standby set time B, which is a timer for generating an operation command after the input set time described above.
5B, a timer 45F for re-exciting the magnet 3 after the separation process setting time F, and the like are provided.

Further, the controller 37 controls the ratio A (%) to the initial magnetic force set value As, the ratio C (%) to the two-sheet hanging determination weight set value Cs, and the ratio D (%) to the magnetic force set value when the workpiece is dropped. An arithmetic unit 47 is provided for calculating the magnetic force set value Es for two-sheet suspension detection from Ds and the ratio E (%).

Further, when the weight detected by the load cell 9 when the plate material W is adsorbed and lifted at the initial magnetic force set value As is less than the two-piece hanging determination weight set value Cs, the control device 37 sets one plate material. A comparison and determination device 49 that determines that W has been adsorbed and determines that two or more plate materials W have been lifted if the detected weight is equal to or more than the two-piece suspension determination weight set value Cs.
Is provided.

Further, the comparison / determination device 49 uses the timer 45 when it judges that two or more plate materials W are lifted.
A separation processing command is generated to operate F to temporarily shut off the excitation of the magnet 3 for a separation processing set time F (seconds) and then re-excitation, and after this separation processing command, the plate material W is moved by the workpiece detection LS31. If it is detected and the weight detected by the load cell 9 is less than the two-piece hanging judgment weight set value Cs, it is judged that one plate W has been adsorbed, and the detected weight is the two-piece hanging judgment weight set value Cs. In the above case, a function of determining that two or more plate materials W have been lifted is provided.

Further, as the comparison and determination device 49, when the absence of the plate material W is detected by the work detection LS31 after the above separation processing command, and as described above, the detected weight is the two-sheet hanging determination weight set value Cs or more. In the case of, it is determined that the magnet 3 is lowered to change the magnetic force of the magnet 3 to the magnetic force set value Es for two-sheet hanging detection, which is smaller than the magnetic force before the separation processing, and the magnetic force set value Es for two-sheet hanging detection is used. After the plate material W is again adsorbed and lifted, a function of issuing a command to repeat the separation process for the separation process set time F (second) and take one sheet as described above is provided.

With the above structure, FIG. 1, FIG. 7 and FIG.
Referring to, the operation of the single-sheet stacking device 1 will be described. The initial magnetic force setting value As is set in the controller 37 in advance at a ratio A (%) for setting the initial magnetic force (step S1). , The elevating cylinder 5 operates and the magnet 3 descends as shown in FIG.
2).

As shown in FIG. 1 (B), the lower end of the magnet 3 contacts the uppermost plate W on the pallet P,
The pressing confirmation LS35 comes into contact with the magnet 3 and turns on.
When the state is reached, the operation of the lifting cylinder 5 is stopped (steps S3 and S4).

The magnet 3 is excited, the plate material W is attracted, and the magnet 3 is raised by the operation of the elevating cylinder 5, so that the plate material W is lifted as shown in FIG. 1 (C) (steps S5 and S6). .

Since the operation of the lifting cylinder 5 is stopped after a short time of the rising standby set time B (seconds), the magnet 3
Is in a standby state at a position slightly higher than the uppermost plate W on the pallet P (steps S7 and S8).

At this time, even if the changeover switch of the circuit connected to the work detecting LS 31 is turned on, the work detecting L is detected.
When the ON signal is not generated in S31, the attracted plate material W is falling from the magnet 3, so the control device 37
In response to a command from the above, the elevating cylinder 5 operates and the magnet 3 descends (steps S9 and S10).

As in steps S3 and S4 above, the lower end of the magnet 3 contacts the uppermost plate W on the pallet P, and the pressing confirmation LS35 contacts the magnet 3 and is in the ON state. The operation of 5 is stopped (steps S11 and S12).

The magnetic force of the magnet 3 is a ratio D to the magnetic force when the plate W is dropped (in this case, the initial magnetic force setting value As).
The magnetic force set value Ds (current magnetic force × D / 100) calculated when the workpiece is dropped is changed from (%) (step S13).

Through the steps S6 to S9 described above, the plate material W is lifted by the magnetic force of the above-mentioned magnetic force set value Ds when the workpiece is dropped.

When the ON signal is generated by the work detecting LS 31, it is judged that the plate material W is attracted to the magnet 3, and the weight detected by the load cell 9 is calculated from the ratio C (%) to the target plate material W. Two-piece hanging judgment weight set value Cs (calculated weight of target plate W × C / 1) corresponding to the weight that can be judged to be sufficiently exceeding the weight of one plate
If the value is less than 00), it is determined that one plate material W is adsorbed, and the process for taking one sheet of the laminated plate is completed (steps S9 and S14).

On the other hand, when the detected weight is greater than the two-piece hanging determination weight set value Cs, it is determined that two or more plate materials W are adsorbed, and the separation process is performed. That is, as shown in FIGS. 1D and 1E, after the excitation command of the magnet 3 is turned OFF for the separation process setting time F (second), the excitation of the magnet 3 is temporarily cut off. It is excited again (steps S15 to S23).

By this separation treatment, for example, as shown in FIG. 1D, when only one plate W sticks to the magnet 3 due to the oil on the surface and another plate W falls, or two plates W fall. When the above plate material W is not separated from the magnet 3 by the oil on the surface and is still stuck, the work detection LS 31 is turned ON. However, Fig. 1 (E)
As shown in, all the plate materials W
When is dropped, the work detecting LS 31 is turned off (step S18).

When the workpiece detection LS 31 is ON, the weight detected by the load cell 9 is less than the two-piece hanging determination weight set value Cs (calculated weight of the target plate W × C / 100), as in step S14. In the case of the value, it is determined that one plate material W is adsorbed, and the step of taking one sheet of the laminated plate is completed (step S25).

On the other hand, if the detected weight is larger than the set value Cs for determining whether two sheets are suspended, two or more plate materials W are used.
Is determined to be adsorbed, and steps S2 to S4 are performed.
In the same manner as in the step of (1), the elevating cylinder 5 operates, the magnet 3 descends, the lower end of the magnet 3 contacts the uppermost plate material W on the pallet P, and the pressing confirmation LS 35 contacts the magnet 3 and turns on. As a result, the operation of the lifting cylinder 5 is stopped (steps S20 to S22).

Even when the work detecting LS 31 is OFF, the steps S20 to S22 are performed as described above.

Then, in order to reduce the magnetic force of the magnet 3 and adsorb the plate material W again, the magnetic force set value at the time of two-sheet suspension detection calculated from the ratio E (%) to the magnetic force at this time (magnetic force before separation processing) Es (current magnetic force × E / 100) is set (step S23).

Through steps S6 to S9 described above, the plate material W is lifted again by the magnetic force of the above-mentioned magnetic force set value Es at the time of detecting the two-sheet suspension. Further, the single-piece taking process of steps S14 to S23 described above is automatically repeated until the single piece of the plate material W is completed.

As described above, the stacking of single sheets is automatically and efficiently carried into the work table of the plate processing machine.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

Further, in the above-described embodiment, the magnet is used as the work suction device, but a suction device provided so that the suction force by vacuum can be adjusted may be used.

[0056]

As can be understood from the above description of the embodiment of the invention, according to the invention of claim 1, the weight detected by the plate weight detecting device when the plate is lifted by the work suction device is 1 If the two-piece hanging judgment weight set value, which is equivalent to the weight at which it can be judged that the weight of one plate material is sufficiently exceeded, it is known that two or more plate materials have been lifted, so do not carry them into the plate material processing machine. However, when the detected weight is less than the two-piece hanging determination weight set value, one sheet is surely picked up, so that it can be carried into the plate material processing machine.

According to the second aspect, when the work detecting device detects that the plate material is adsorbed after the separation processing, for example, only one plate material adheres to the work adsorbing device and another plate material falls. Alternatively, two or more plate materials are still attached to the work suction device without being separated. At this time, if the weight detected by the plate material weight detection device is equal to or more than the weight for determining that the weight of one plate material can be judged to be sufficiently exceeded, the two-piece hanging judgment weight set value is equal to or more than, the two or more plate materials are selected. Since it is known that it has been lifted, it is not carried into the plate material processing machine, but if only one sheet is left due to the separation process, the detected weight is less than the two-piece hanging judgment weight set value, so one sheet must be reliably taken and the plate material processing machine You can carry it in.

According to the third aspect, when two or more plate materials are still lifted after the separation processing, or when the work detection device does not detect the plate materials, the two-piece hanging detection reduced from the suction force before the separation processing is performed. Since the workpiece is sucked again by the workpiece suction device at the set suction force and lifted, one sheet can be taken. In this case, it is surely determined that one sheet has been taken and the sheet is carried into the plate processing machine. Even if two or more sheets are hung up, they can be separated into one sheet because the separation process is performed again. If it still does not separate, it can be judged that two or more sheets have been lifted, so do not carry it into the plate processing machine.

According to the invention of claim 4, which is similar to the effect of claim 1, the weight detected by the plate weight detecting device when the plate is lifted by the work suction device is sufficient for one plate. If the two-piece hanging judgment weight set value corresponding to the weight that can be judged to be over is exceeded, it is known that two or more plate materials have been lifted, so it is not carried into the plate material processing machine, but the detected weight is two. If the weight is less than the suspending judgment weight set value, one piece is surely taken and it can be loaded into the plate processing machine.

According to the invention of claim 5, the effect is the same as that of claim 2, and when it is detected by the work detection device that the plate material is adsorbed after the separation processing, for example, 1
This is the case where only one plate material is attached to the work adsorption device and another plate material falls, or two or more plate materials are still attached without being separated from the work adsorption device. At this time, the weight detected by the plate weight detection device is 1
If the two-piece hanging judgment weight set value, which is equivalent to the weight at which it can be judged that the weight of one plate material is sufficiently exceeded, it is known that two or more plate materials have been lifted, so do not carry them into the plate material processing machine. However, when only one sheet is obtained by the separation process, the detected weight is less than the two-sheet hanging determination weight set value, so one sheet can be reliably taken and carried into the plate material processing machine.

According to the invention of claim 6, the effect is similar to that of claim 3, and when two or more plate materials are still lifted after the separation process or when the work detecting device does not detect the plate material, the separation is performed. Since the work piece suction device again picks up the work piece with the suction force setting value when detecting the suspension of two sheets, which is less than the suction force before processing, one piece can be picked up. In this case, be sure to judge that one piece has been picked up. Carry it into the plate processing machine. Even if two or more sheets are hung up, they can be separated into one sheet because the separation process is performed again. If it still does not separate, it can be judged that two or more sheets have been lifted, so do not carry it into the plate processing machine.

[Brief description of drawings]

FIG. 1A to FIG. 1E are operation explanatory views by a single-layering device for a laminated plate material according to an embodiment of the present invention.

FIG. 2 shows an embodiment of the present invention and is a front view including a cross-section of a main part of a single-layering device for a laminated plate material.

FIG. 3 is a right side view of FIG.

FIG. 4 is a plan view taken along the line IV-IV of FIG.

5 is a plan view taken along line VV in FIG.

FIG. 6 shows an embodiment of the present invention and is a block diagram of a control device.

FIG. 7 shows an embodiment of the present invention, and is a flowchart of a method for taking one sheet of a laminated plate material.

FIG. 8 shows an embodiment of the present invention, and is a flowchart of a method for taking a single sheet of a laminated plate material.

FIG. 9 is an explanatory diagram of a conventional method for taking one sheet of a laminated plate material.

[Explanation of symbols]

1 Single sheet picking device 3 magnets (workpiece suction device) 5 Lifting cylinder 9 Load cell (plate material weight detector) 31 Work detection LS (work detection device) 35 LS for pressing confirmation 37 Control device 45B timer B 45F Timer F 49 Comparative judgment device As initial magnetic force setting value B rise standby time Cs 2 piece hanging judgment weight set value Ds Workpiece magnetic force setting value Es Magnetic force set value when detecting two hangings F Separation treatment setting time

Claims (6)

[Claims] 1. A work adsorbing device lifts a plate material and the weight of the adsorbed plate material is measured by a plate material weight detecting device, and the weight detected by the plate material weight detecting device is sufficiently larger than the weight of one plate material. If it is less than the set value of the two-piece hanging judgment weight corresponding to the weight that can be judged to be, it is judged that one plate material has been adsorbed, and if the detected weight is equal to or more than the two-piece hanging judgment weight set value, two or more A method for taking a single layer of laminated sheet material, which comprises determining that the sheet material has been lifted. 2. When it is determined that two or more plate materials have been lifted, the work adsorbing device is temporarily shut off and re-adsorption is performed, and the plate material is detected by the work detecting device after the separation process. 1 if the weight detected by the plate weight detection device is less than the set value for determining the weight of hanging two sheets
The stacking according to claim 1, wherein it is determined that one plate material is adsorbed, and if the detected weight is equal to or more than the two-piece suspension determination weight set value, it is determined that two or more plate materials have been lifted. How to take one sheet. 3. When it is determined that two or more plate materials have been lifted after the separation treatment or when the work detection device does not detect the plate materials, the work suction device is lowered and the suction force before the separation process is reduced. Change to the adsorbing force setting value when detecting a two-sheet hanging, and lift the plate again with this adsorbing force setting value when two-piece hanging is detected, and if the detected weight is less than the two-piece hanging judgment weight setting value, It is determined that a plate material has been adsorbed, and if the detected weight is equal to or more than the two-piece hanging determination weight set value, it is determined that two or more plate materials have been lifted and the separation process is performed again. Item 3. A method for taking one sheet of laminated board according to item 2. 4. A work suction device capable of lifting the plate material by suction force and adjusting the suction force, a plate weight detection device for measuring the weight of the sucked plate material, and the work suction device through the plate weight detection device. An elevating and lowering device for raising and lowering the device, a work detecting device for detecting the presence or absence of a work to be adsorbed by the work adsorbing device, and a weight detected by the plate material weight detecting device sufficiently exceeding the weight of one plate material. 2 which corresponds to the weight that can be judged
If it is less than the set value of the hanging judgment weight, it is judged that one plate material has been adsorbed, and if the detected weight is equal to or more than the set weight judgment value of hanging two pieces, it is judged that two or more plate materials have been lifted. And a control device including a comparison / determination device. 5. When the control device determines that two or more plate materials have been lifted, a separation processing command for temporarily shutting off the work adsorption device and adsorbing again is generated, and after the separation processing instruction, the work is adsorbed. When the plate material is detected by the detection device and the weight detected by the plate material weight detection device is less than the two-piece hanging determination weight set value, it is determined that one plate material is adsorbed, and the detected weight is the two-sheet hanging determination. The single-ply sheet stacking device according to claim 4, further comprising a comparison / determination device that determines that two or more plate materials are lifted when the weight is equal to or more than a set value. 6. When the control device determines that two or more plate materials have been lifted after the separation process or when the work detection device does not detect the plate materials, the work suction device is lowered and Change to the suction force setting value for two-sheet hanging detection, which is less than the suction force before separation processing, and the plate weight is lifted again with the suction force setting value for two-sheet hanging detection and the detected weight is the two-sheet hanging judgment weight set value. If it is less than the above, it is determined that one plate material is adsorbed, and if the detected weight is equal to or more than the two-piece hanging determination weight set value, it is determined that two or more plate materials are lifted and the separation process is performed again. The single-ply take-up device according to claim 5, further comprising a comparison / judgment device for issuing a command.