JPH06263275A - One sheet taking off method and one sheet taking-off device for plate material - Google Patents

Abstract

PURPOSE:To take off plural stacked plate materials reliably one by one particularly in an NC press system. CONSTITUTION:Intervals are secured mutually in the direction along the plate material surfaces of plural stacked plate materials, and plural attracting pads (101a-101h) arranged at a distance from the plate material surfaces are brought into contact with the outermost parts of a plate material 2a so as to be sucked. Next, while holding at least a single suction pad (101b, 101c, 101f or 101g) among the plural attracting pads in a contact position with the plate materials, the residual suction pads (101a, 101d, 101e and 101h) are retreated by a prescribed distance from the contact position while keeping an attracting condition to the plate material 2a, and elastic bending is given to the plate material 2a, and the margin parts are tucked up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-rolling method and a single-rolling apparatus, and is particularly applied when a plurality of plate materials stacked in an NC press system are rolled up one by one and sucked and conveyed to the next step. The above method and apparatus.

[0002]

2. Description of the Related Art In various press machines for processing plate materials, it is necessary to sequentially convey and supply the stacked plate materials one by one, and a manipulator for performing this unmanned has become popular in recent years. For example, in a numerically controlled turret punch press (NCTPP), a large number of stacked plate materials are vacuum-sucked one by one by a vacuum suction pad (hereinafter, simply referred to as “suction pad”) and transported to a predetermined location. A loader / unloader for supplying to NCTPP is additionally provided.

By the way, the stacked plate materials are easily adhered to each other and cannot be separated more easily when oil is attached to the surface. For this reason, it is not possible to reliably separate the plates one by one simply by picking them up with a suction pad and lifting them up.If two plates are conveyed in close contact, the system will be forced. There are inconveniences such as stopping and having to be manually separated by a person. Therefore, various methods for surely separating and adhering the stacked and adhered plate materials one by one are
Conventionally adopted.

FIG. 7A shows a plate material separating method called an air blow method, which is used in the conventional suction and conveyance. In this method, when the uppermost plate material b adsorbed by the adsorption pads a and a is raised, air is blown from a nozzle d between the plate material b and another plate material c closely adhered to the lower surface thereof to separate the two. It is something that is done.

FIG. 7B shows a plate material separating method called a magnet floater method. in this way,
The plate material is magnetized with the same polarity by the electromagnet e, and each iron plate f,
With the repulsive force (repulsive force) of g, h ..., the end portions of the plate material are floated to separate the iron plates f, g, h ... from each other, and these are sequentially adsorbed by the adsorption pads a, a to be conveyed. I have to.

[0006]

By the way, in the air blow method, accurate air blowing is required between the plate material b and the plate material c, and as the thickness of the plate material becomes thinner, the above accurate air blowing is required. It becomes difficult to separate the plate materials. Further, when the plate material b and the plate material c are strongly adhered to each other through the oil film, it is difficult for air to enter between the plate materials b and c, and the plate materials b and c are almost separated from each other. There is a problem saying that it is impossible. On the other hand, the magnet floater method
Since it can be applied only to magnetic materials (mainly iron plates), there is a problem that it cannot be applied to non-ferrous metal plates such as aluminum plates and brass plates, non-metal plates such as plastic plates and bakelite plates.

The present invention has been proposed in order to solve the above problems and is stacked and adhered regardless of the material and thickness of the plate materials or the presence or absence of an oil film between the plate materials. An object of the present invention is to provide a method for winding a single sheet of plate material that can reliably separate a plurality of sheet materials one by one, and a single sheet winding device suitable for carrying out this method.

[0008]

SUMMARY OF THE INVENTION A method of rolling a single sheet of plate material according to the present invention includes at least one sheet material for winding, which is arranged in a direction along the plate material surface of a plurality of stacked sheet materials with a space therebetween. A first step of bringing the suction pad and at least one pressing member into contact with the endmost plate member of the plate members, and adsorbing the turning-up suction pad to the plate member; Holding the adsorbing pad for advancing with the plate material while retracting the adsorbing pad for turning up a predetermined distance from the abutting position while adsorbing the adsorbing pad for turning up to the plate material, thereby elastically bending the plate material to roll up the peripheral edge of the plate material And a process.

Further, the single-sheet turning device of the present invention comprises at least one adsorbing pad for turning, which is arranged at a distance from each other in a direction along the plate surface of a plurality of stacked plate materials, At least one pressing member, means for bringing the turning-up suction pad and the pressing member into contact with the endmost plate member of the plate members, and the pressing member at the contact position with the endmost plate member And a hoisting means for retracting the adsorbing pad for turning up while retracting the adsorbing pad for turning up a predetermined distance from the abutting position.

Further, the pressing member may be a suction pad, or the hoisting means may be a fluid cylinder capable of individually advancing / retreating the turning suction pad and the pressing member. In addition, the fluid cylinder may be provided with an extension point detection sensor and a contraction point detection sensor.

Usually, as a means for bringing the turning-up suction pad and the pressing member into contact with the plate member, a driving means different from the fluid cylinder (for example, a member (hand) that supports the cylinder) is used.
The air cylinder that drives itself) is also used. It should be noted that the driving means and the fluid cylinder are combined with each other in order to move the suction suction pad and the pressing member for turning forward toward the plate material to contact them, or to retract the suction pad and the pressing member from the plate material. It is also possible to operate it to perform the contact, forward movement or backward movement.

If the turning suction pad (or the suction pad used as the pressing member) adopted in these means has a structure capable of sufficiently sucking the plate material by a negative pressure suction force, There are no restrictions on size, shape, material, etc. Further, the required number of turning-up suction pads and pressing members are each at least one. Here, when the plate material is small and lightweight, only one turning-up suction pad may be provided. When the plate material is large and heavy, a large-diameter suction pad for turning may be used (in this case, only one may be used),
A suction pad may be used as the pressing member.

Furthermore, in order to adsorb a plate material (particularly, a heavy material such as a metal plate material) in a stable state, it is possible to appropriately increase the number of adsorbing pads for turning up and adsorbing pads used as pressing members. it can. For example, two turning-up suction pads and two suction pads as pressing members are
Two sets of turning-up suction pads, pressing members, pressing members, and turning-up suction pads arranged in a straight line are arranged side by side, and the turning-up suction pads (four in total) at both ends of each set are plate ends. It is also possible to impart elastic bending to the part.

[0014]

In the method of rolling one sheet of plate material according to the present invention,
The turning suction pad and the pressing member, which are arranged at a predetermined interval in the direction along the plate surface, are moved forward with respect to the plate member at the end of the stacked plate members. Then, the turning-up suction pad and the pressing member are brought into contact with the plate member at the end portion, and the plate member is sucked by the negative pressure suction force of the turning-up suction pad (first step). At this time, when the suction pad is used as the pressing member, a negative pressure suction force may be applied to the suction pad.

Next, with the pressing member being held at the contact position with the plate member, the turning suction pad is retracted by a predetermined distance. As a result, elastic bending is imparted to the plate material, and the peripheral edge portion thereof is rolled up against the adhesive force with the second plate material (the plate material adjacent to the endmost plate material) (second step). At this time, even if a liquid such as an oil film is present between the plate members and it is difficult to separate the plate members one by one, the plate members can be rolled up with an efficiency higher than the manual operation. When the method of the present invention is used as an NCTPP conveying device, the plate materials adsorbed to the turning-up adsorption pad separated from the second plate material are conveyed one by one to the next step. At this time, when a suction pad is used as the pressing member, a negative pressure suction force is also applied to the suction pad, and reliable transport is guaranteed. Note that normally,
The elastic bending of the plate material separated from the second plate material is released by operating the turning suction pad and the pressing member relative to each other immediately after the separation or during the transportation.

In the single-sheet turning device according to the present invention, the mutual distance between the turning suction pad and the pressing member in the direction along the plate material surface and the retreat distance of the turning suction pad at the time of hoisting are determined by bending the plate material. It is appropriately set according to elasticity. For example, when the plate material is thin or when the bending elasticity of the plate material is small, if the mutual interval is set to be small, even if the retracting distance of the suction pad for turning up is small, the peripheral portion of the plate material is large. Can be lifted. On the other hand, if the plate is thick or if the bending elasticity of the plate is large, set the above mutual gap to a large value and increase the retracting distance of the suction pad for turning up to ensure the peripheral edge of the plate. You can also lift it.

When a fluid cylinder is used as a means for advancing / retreating the turning-up suction pad and the pressing member (that is, turning-up means), and an extension point detection sensor and a contraction point detection sensor are provided in the cylinder. Is easy to determine if the bottom dead center of the hand or the cylinder is separated from the plate (ie,
It is possible to detect whether or not top dead center is reached. If one fluid cylinder provided with this sensor is provided in the hand, the above-mentioned bottom dead center or top dead center can be detected, but by providing a plurality of fluid cylinders, it is possible to easily detect warpage of a plate material or obstacles. .

[0018]

1 to 4 show an embodiment of a method for turning a sheet and a device for turning a sheet according to the present invention. In FIG. 4, the single-sheet winding device constitutes a part of the plate material suction / conveyance device 1, and is used as a loader / unloader as a manipulator attached to the NCTPP.

In the plate material adsorption / conveyance device 1, a large number of plate materials 2 in a stacked state (not limited to iron plates, non-ferrous metal plates, plastic plates, bakelite plates, and the like) can be used.
A base member for transporting to a predetermined position on the table 3 such as CTPP and capable of reciprocating between the upper position of the plate material 2 and the upper position of the table 3 along the rails 5 and 5 laid on the frame 4. 6 is provided.

A cylinder 7a of a hand elevating means 7 using an air cylinder is erected and fixed on the upper surface of the central portion of the base member 6, and the piston rod 7b has a piston rod 7b.
Projecting below. And this piston rod 7b
The center of the hand 8 is connected to the lower end of the hand.

The hand 8 has left and right supporting portions 8a and 8b extending horizontally along the left and right sides of the plate member 2 and a central portion of the piston rod 7b connected to the supporting portions 8a and 8b.
And a connecting portion 8c which is connected to the intermediate portion of the plate member 2 and has an overall H shape and is supported substantially parallel to the plate member 2. Air cylinders 9a to 9f (which form the winding means of the present invention) are respectively projected on the lower surfaces of the supporting portions 8a and 8b downward at a predetermined pitch interval.
The turning suction pads 10c and 10f are not used at the tips of the air cylinders 9c and 9f (hereinafter, the tips of the cylinder rods are referred to as "tips of the air cylinder" for convenience), and the tips of the air cylinders 9a and 9d are not used for turning. Adsorption pads 10a and 10d are provided respectively. Also,
A pressing member is provided at the tips of the air cylinders 9b and 9e.

In this embodiment, each of the suction pads 10a,
10c, 10d, and 10f are cup-shaped members made of an appropriate elastic material such as synthetic rubber, and the plate member 2 is sucked by pressing the opening of the plate member 2 to a negative pressure. Negative pressure suction type, and each of them is connected to a negative pressure source (not shown) via an air hose (not shown). Further, in the present embodiment, the pressing member 1
0b and 10e are made of synthetic resin such as synthetic rubber.

Next, with reference to FIGS. 1 to 3, the operation of the plate material suction / transport device 1 shown in FIG. 4 will be described. As shown in FIG. 1, the hand lifting means 7 operates to operate the piston rod 7b.
When is extended downward, the suction pads and the pressing members (10a to 10f) at the tips of the air cylinders 9a to 9f attached to the hand 8 are simultaneously pushed to the uppermost (endmost) plate member 2
It descends toward the a side, and these come into contact with the uppermost plate material 2a. Here, the suction pads 10a, 10c, 10d, and 10f are sucked onto the plate member 2a by the negative pressure supplied from the negative pressure source (not shown), and the first step is completed.

Next, as shown in FIG. 2, the suction pad 1
0a, 10d and pressing members 10b, 10e are plate materials 2a
Adhesion pad 10c, 10f for turning over while pressing
Only rises by a predetermined amount H. As a result, elastic bending is imparted to the plate material 2a, the peripheral edge thereof is lifted upward against the adhesive force with the lower plate material 2b, and separated from the lower plate material 2b, and the second step is completed.

In this embodiment, as shown in FIG.
The suction pads 10a, 10d and the pressing members 10b, 10e that have pressed the plate member 2a are the suction pads 10 for turning up.
C and 10f, the plate material 2a is completely separated from the second plate material 2b, and the elastic bending of the plate material 2a is released. After this, the plate material 2a is attached to the piston rod 7
When a is shortened, it further rises, and is conveyed to the NCTTP table 3 as the base member 6 moves along the rails 5 and 5 (see FIG. 4).

The release of the elastic bending of the plate 2a is
Although it was performed by raising the suction pads 10a, 10d and the pressing members 10b, 10e which are not for turning up, after the first step, the piston rod 7a is shortened and the plate member 2
a is raised in a state of being elastically bent, and thereafter, the cylinders 9c and 9f to which the suction pads 10c and 10f for turning are attached are set to the initial height (the height of the suction pads 10a and 10d and the pressing members 10b and 10e). ), The elastic bending can be released. Thus, when lowering the cylinders 9c and 9f to the initial height, the suction members 10a and 10d or the pressing members 10 are pressed.
b and 10e can be fixed. That is, instead of the cylinders 9a, 9d or 9b, 9e, a non-expandable rod can be used.

As described above, the many plate materials 2 are not limited to iron plates, but may be aluminum plates, stainless plates, copper plates, plastic plates, bakelite plates, or the like having high rigidity. Even if it is thin, it can be rolled up one by one.

FIG. 5 shows another embodiment of the present invention. In the single-sheet turning device (namely, the plate material suction / conveying device 1), four air cylinders 91a to 91h are used, four on each side of the hand 8, and the tip end of these air cylinders 91a to 91h are used for turning. Pads 101a, 101d, 101
e, 101h, suction pad 1 used as a pressing member
01b, 101c, 101f, 101g are attached. In this embodiment, the air cylinders 91a, 91
A group of d, 91e, 91h, and cylinders 91b, 9
The groups 1c, 91f, and 91g perform the same series of operations (however, the operations of the groups are different from each other). In the single-sheet turning device shown in FIG.
The h is lowered to suck the suction pads 101a to 101h onto the plate material 2a. Then, the suction pads 101b, 101c, 101f, 101g as pressing members are held in the lowered position, and the turning-up pads 101a, 101d, 101 are held.
e and 101h are operated so as to be raised by a predetermined amount H, and elastic bending is applied to the plate material 2a. After this, the suction pads 101b, 101c, 101f, 1 as pressing members
The elastic bending is released by raising 01 g.

FIGS. 6A and 6B show an example of an air cylinder provided with an extension point detecting sensor and contraction point detecting sensors S1 and S2. The air cylinder 9 shown in the figure is provided with ports A and B for injecting and ejecting air at both ends, and by injecting and ejecting air from the port A (that is, ejecting and injecting air from the port B), The pistons 12 can be arranged upside down. Further, the sensors S1 and S2 can detect that the piston 12 is at the bottom dead center and the top dead center, and in the free state, the piston 12 can easily move up and down by applying a slight load.

For example, the apparatus shown in FIG.
If the cylinder 9 shown in FIG. 2 is used, it can be used for detecting the bottom dead center of the hand 8. That is, when the entire hand 8 (see FIG. 5) is lowered from the state where the sensor 2 of FIG. 6 (a) is ON, the suction pad 101 reaches the plate material 2 a stacked below and the piston 12 is pushed. In this state, the sensor S1 is switched from ON to OFF, so that the bottom dead center can be detected (see FIG. 6B). In addition, all of the cylinders 91a to 91h in FIG.
When the cylinder 9 of FIG. 6B is used and the state of FIG. 6A is changed to the state of FIG. 6B, the hand 8 is stopped to absorb the warp and inclination of the plate material 2a. be able to. Furthermore, such a cylinder 9 can also be applied to obstacle detection. That is, when the sensor S2 is turned on before the bottom dead center is detected while the hand 8 is descending, it can be determined that the movement of the hand 8 is obstructed by the obstacle.

The present invention does not prevent the combined use with the conventional technique, and can be appropriately used together with the conventional air blow system or the like, if necessary.

[0032]

As described above, the present invention has the following effects. (1) A plurality of stacked plate materials can be reliably separated one by one regardless of the material and thickness of the plate materials, and regardless of the presence or absence of an oil film or the like between the plate materials. This can eliminate forced stoppage of the press system. (2) When the air cylinder provided with the extension point detection sensor and the contraction point detection sensor is used, the bottom dead center of the hand can be detected, and the warp of the plate material and the obstacle can be easily detected. Become. (3) In the loader / unloader such as NCTPP to which the present invention is applied, regardless of the material and thickness of the plate material or the presence or absence of an oil film between the plate materials, a plurality of plate materials that are stacked and closely adhered to each other is also used. It is possible to reliably separate and suck and transport each one, and it is possible to achieve unmanned work.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first step of a one-sheet winding method according to the present invention.

FIG. 2 is an explanatory diagram of a second step of the one-sheet turning method according to the present invention.

FIG. 3 is an explanatory view showing a state of plate material separation in the single-sheet turning method according to the present invention.

FIG. 4 is an NCT to which the single-sheet turning device according to the present invention is applied.
It is a perspective view of the loader / unloader for PP.

FIG. 5 is a view showing another embodiment of the single-sheet turning device according to the present invention.

FIG. 6 is a diagram showing a cylinder using an extension point detection sensor and a contraction point detection sensor used in the present invention,
(A) is a figure which shows the state before adsorption | suction, (b) is a figure which shows the state at the time of adsorption | suction.

7A and 7B are explanatory views of a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Single-rolling device 2 Plate material 7 Hand raising / lowering means 8 Hand 9 Cylinder provided with a sensor 9a-9f Air cylinder 91a-91h Air cylinder 10c, 10f Adsorption pad for turning 10a, 10d Adsorption pad 10b, 10e not for turning Pressing member 101 suction pad 101a, 101d, 101e, 101h turning pad 101b, 101c, 101f, 101g suction pad as a pressing member

Claims (5)

[Claims] 1. At least one vacuum suction pad for turning and at least one pressing member, which are arranged with a gap between each other in a direction along the plate surface of a plurality of stacked plate materials, A first step of bringing the endmost plate member of the plate members into contact and adsorbing the turning vacuum suction pad to the plate member; and holding the pressing member at the contact position with the endmost plate member, A second step of rolling up the peripheral edge of the plate material by retracting the vacuum suction pad for turning up the plate material by a predetermined distance from the abutting position and applying elastic bending to the plate material. A method of turning one sheet of plate material. 2. At least one vacuum suction pad for turning, at least one pressing member, which is arranged with a gap between each other in a direction along the plate surface of a plurality of stacked plate materials, and the turning. Means for bringing the vacuum suction pad and the pressing member into contact with the outermost plate member of the plate members, and the turning vacuum suction member while holding the pressing member at the contact position with the end plate member. A single-rolling-up device for a plate material, comprising: a roll-up device that retracts the pad while adhering to the plate material from a contact position by a predetermined distance. 3. The single-sheet turning device according to claim 2, wherein the pressing member is a vacuum suction pad. 4. The plate member according to claim 2 or 3, wherein the hoisting means is a fluid cylinder capable of individually advancing / retreating each pressing member and the hoisting vacuum suction pad. Single page turning device. 5. The single-rolling device according to claim 4, wherein the fluid cylinder is provided with an extension point detection sensor and a contraction point detection sensor.