JPH0714276Y2 - Sheet material feeder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is an apparatus for automatically lifting and inserting a sheet-like material into a molding die or the like in a resin molding manufacturing process or the like and pasting it. It is about.

[Prior Art] FIG. 5 is a perspective view showing a conventional sheet material feeder shown in, for example, Japanese Utility Model Publication No. 61-86340. This conventional example shows the case of a sheet-shaped film. In the figure, the sheet-like film 3 is laminated on a film base 16 which moves up and down in a film frame 20 fixed to the film carrier 1. The moving rack 6 fixed to the film carrier 1 is engaged with the suction roller 9 and the spur gears 8 of the two auxiliary rollers 10, and the three spur gears 8 are also engaged with the fixed rack 7. The suction roller 9 arranged coaxially with the left end spur gear 8 is formed of a hollow tube and has a slit-shaped suction hole 26 along one generatrix of the outer peripheral portion of the cylinder. It is connected to a suction means (not shown) for applying a negative pressure to 26.
The two auxiliary rollers 10 are arranged coaxially with the center and right end spur gears 8. The bearings on one side of the suction roller 9 and the two auxiliary rollers 10 are not shown. The air blowing nozzle 11 is fixed to the fixed rack 7 while maintaining a predetermined positional relationship with the suction roller 9. The suction plate 12 has three suction holes 27, 28, 29 on the lower surface thereof, and each suction hole is connected to suction means (not shown) by the corresponding nipples 30, 31, 32. The suction cup 12 is fixed to the tip of a robot arm 13, and the extension of the robot arm 13 allows the suction cup 12 to move to the position of the mold 14.

Next, the operation of the above conventional example will be described. 6 and 7
The operation of this conventional example is shown in FIGS. FIG. 6 shows the initial state. When the operation is started, the motor 23 shown in FIG. 5 rotates in the arrow A direction, and the belt 4 on the pulley 25 moves the film carrier 1 in the arrow C direction. The suction roller 9 moves on the sheet-shaped film 3 while rotating in the direction of arrow A. The suction hole 26 of the suction roller 9 becomes negative pressure by a suction means (not shown), and when the sheet-shaped film 3 faces the upper surface, the sheet-shaped film 3 is sucked. The three spur gears 8 sandwiched between the movable rack 6 and the fixed rack 7 and engaged with each other rotate in the direction of arrow A by the movement of the film carrier 1. 7th
The figure shows a state in which the suction roller 9 is rotated by about 1/4 by the movement of the film carrier 1 in the C direction. The suction roller 9 lifts up the edge of the sheet-like film 3, and at this moment, the air blowing nozzle 11 blows out air to vibrate the edge and blow air into the gap, so that one sheet of the sheet-like film 3 is cut. Peel off the adhesion between the second sheet and the second sheet and below, and lift the first sheet of the top sheet completely. When the film carrier 1 further moves to the position shown in FIG. 8, the sheet-shaped film 3 is wound around about half the circumference of the suction roller 9, and the end face of the sheet-shaped film 3 is positioned at the suction hole 27 of the suction disc 12. It is configured to come. At the same time as the state shown in FIG. 8, the suction holes 2 connected to the nipples 30, 31, and 32 that are connected to the suction means (not shown)
Negative pressure is applied to 7, 28 and 29, and the edges of the sheet-shaped film 33 are adsorbed. When the suction holes 27 suck the sheet-shaped film 3, suction by the slit-shaped suction holes 26 of the suction roller 9 is stopped. The film carrier 1 further continues to move in the direction of arrow C, and the sheet-like film 3 having the end portions adsorbed by the adsorption holes 27 is adsorbed on the lower surface of the adsorption disc 12 while reversing the front and back. When the sheet-shaped film 3 is also sucked by the suction holes 28 and 29, respectively, the robot arm 13 extends in the direction of arrow E to move the suction plate 12 above the molding die 14 to form the sheet-shaped film 3 in the molding die. At the same time when the sheet-shaped film 3 is pressed against the inner surface of the mold 14, suction of the suction holes 27, 28, and 29 is stopped, and air is blown to insert the sheet-shaped film 3 into the molding die 14 and stick it. When the attachment of the sheet-shaped film 3 is completed, the robot arm 13 moves the suction plate 12 to the original position and stops. Further, the motor 23 rotates in the B direction and moves the film carrier 1 in the D direction to return it to the initial position.

[Problems to be solved by the invention] When the first sheet material is lifted at once in a vertical direction to the upper surface of the laminated sheet material, the lower surface of the first sheet material comes into surface contact. The gap between the second sheet and the second sheet is temporarily in a vacuum state, the gaps between the following sheets are similar, and the second and subsequent sheets are simultaneously lifted. In the case where thin dielectric sheets are stacked, static electricity naturally accumulates and attracts each other. The larger the contact area, the greater the attracting force and the separation becomes difficult. In order to solve such a problem, in the device previously devised by the same applicant, one sheet-like object is once fixed to the suction roller while moving the laminated sheet-like objects, and then the suction roller is newly re-established. It was configured to be moved from the to the suction cup and to the molding die by the movement of the suction cup. The apparatus has many steps for moving the sheet-like material in this way, and it is difficult to insert the material at a precise position in the final stage, and to increase the speed for attaching the material, and the mechanism is considerably complicated. However, there is a problem that the number of parts is large and the device becomes large. Further, since the wrapping angle of the sheet-like material wound around the suction roller is 180 °, there is a problem that it cannot be used for a thick sheet-like material or a material with high rigidity.

The present invention has been made to solve the above problems, and reliably separates the first and second laminated sheet-like objects, even in the case of a thin sheet-like object having a dielectric material. The purpose is to obtain a device that reduces the influence of static electricity. Another object of the present invention is to obtain a sheet-like material feeding device that can be used for thick sheets and high-rigidity sheets, while reducing the number of steps for moving the sheet-like objects, simplifying the structure, and downsizing the apparatus. .

[Means for Solving the Problems] A sheet-shaped material feeding device according to the present invention is a sheet-shaped product in which a suction roller having a slit-shaped suction hole on at least one generatrix of a cylindrical surface and the suction roller are laminated. The suction roller is rotated around its axis while being arranged at one end on the first surface of the object and sucking the end of the first sheet-like object by the suction hole of the suction roller. However, a moving mechanism for rolling a predetermined distance, an auxiliary suction plate provided in the moving mechanism and having at least one slit-shaped suction hole, the suction roller, the moving mechanism, and the auxiliary suction disc are integrated. As a feed unit that is rotatable about a rotation axis that is parallel to the rotation axis of the suction roller, and one sheet that is attracted to the supply unit by tilting and raising the supply unit from the upper surface of the stacked sheet-like objects. Sai of the eye A rotating mechanism for moving the sheet-like material to a predetermined position of the grounded molding die, an electrostatic adder for adding static electricity to the sheet-like material adsorbed by the supply section, and an attraction or sticking of the sheet-like material. In order to do so, a switching means for switching the suction or blowing operation of air by the suction holes of the suction roller and the auxiliary suction disk, and the first sheet position in the stacked sheet-like materials are always fixed and stacked. And a sheet-like object raising / lowering mechanism for pressing the sheet-like object against the supply section at a desired pressure with a constant pressure.

[Operation] The slit-shaped suction holes on at least one generatrix of the cylindrical surface of the suction roller are negatively pressured by the suction means to suck the first end portion of the stacked sheet-like materials.

Next, the suction roller that has sucked one end of the sheet-like material rolls on the surface of the sheet-like material by the moving mechanism, and sucks only the first sheet of the laminated sheet-like material at a predetermined angle. Bend the roller.

Next, the supply unit that integrates the suction roller, the moving mechanism, and the auxiliary suction plate is such that the end portion of the first sheet material that is sucked is lifted from the remaining stacked sheet materials. By being rotated by the rotating mechanism, the first sheet-like material is completely separated from the second and subsequent sheet-like materials.

The first sheet separated from the second and subsequent sheets is charged with static electricity by a static electricity adding device and moved to a grounded molding die at a predetermined position to move to a predetermined surface of the molding die. Sheets are attached.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a perspective view of a supply unit showing an embodiment of the present invention,
This is a case where the sheet-shaped film 3 is used as the sheet-shaped material. The sheet-like film 3 is laminated on a film base 16 which moves up and down in the film frame 20. The film base 16 is attached to the piston 18 of the air cylinder 17 via a spring 35 so as to move up and down in the film frame 20. The air cylinder 17 is fixed to a film lifting rack 2 of a sheet-like object lifting mechanism described later. Film stand lifting motor
A pinion 19 attached to 22 engages with the film lifting rack 2 and drives the film lifting rack 2 up and down. The sheet-like object raising / lowering mechanism in this embodiment is composed of a film raising / lowering rack 2, an air cylinder 17, a pinion 19, a film stand raising / lowering motor 22, and photoelectric switches 15a and 15b each including a light emitting portion and a light receiving portion which will be described later.

The suction roller 9 arranged so as to come into contact with the upper surface of the laminated sheet-shaped films 3 has a hollow inside. The suction roller 9 has a slit-shaped suction hole 26 formed on at least one generatrix of the cylindrical surface on the outer periphery thereof. The slit-shaped suction hole 26 is located at a position facing the upper surface of the sheet-like film 3 in the initial state. Is designed to be. The spur gear 8 is coaxially fixed to both ends of the suction roller 9, and the diameter of the suction roller 9 and the diameter of the pitch circle of the spur gear 8 are the same. The spur gear 8 meshes with the intermediate spur gear 42, and the intermediate spur gear 42 meshes with the rack 45. The spur gear 8 has no gear formed over the entire circumference thereof, and is formed only at a position where it meshes with the intermediate spur gear 42, and is designed so that the gear does not contact the upper surface of the sheet-like film 3. Since the spur gear 8 rotates only about 1/3 together with the suction roller 9 fixed to the spur gear 8, gears are formed only about half the circumference of the spur gear 8 that meshes with the intermediate spur gear 42, and the remaining half circumference part is the suction roller. It is made to coincide with the cylindrical surface of the sheet-shaped film 9 so that the upper surface of the sheet-shaped film 3 does not come into contact with the surface of the spur gear 8 even if the spur gear 8 rotates. The shafts of the spur gear 8 and the intermediate spur gear 42 are received by a bearing plate 39, and the bearing plate 38 maintains a predetermined positional relationship between the spur gear 8, the intermediate spur gear 42, and the rack 45 by the bearing plate 39. The bearing plate 39 is connected to the air cylinder 38. In addition, the auxiliary suction plate 36 is fixed to the rack 45, and the auxiliary suction plate 36 has suction holes.
36a is formed. The auxiliary suction board 36 is arranged so that the suction holes 36a are in contact with the upper surface of the laminated sheet-shaped film 3. The supply unit 50 including the suction roller 9, the spur gear 8, the auxiliary suction plate 36, the air cylinder 38, the bearing plate 39, the intermediate spur gear 42, and the rack 45 is connected to the rotating arm 37 that is a rotating mechanism so that it can move. It is configured. The slit-shaped suction holes 26 of the suction roller 9 and the suction holes 36a of the auxiliary suction plate 36 are connected to suction means (not shown). In the present embodiment, the spur gear 8, the bearing plate 39, the intermediate spur gear 42, the rack 45.
The moving mechanism is configured by.

Next, the operation of the above embodiment of the present invention will be described. When it is attempted to lift only the first upper end of the laminated sheet-like film 3 which is easily charged and is perpendicular to the sheet surface at once, the surface contact with the lower side of the first sheet-like film 3 which is about to be lifted The gap between the second sheet-like film 3 and the second sheet-like film 3 is temporarily in a vacuum state, and the gaps between the following sheet-like films are also in a vacuum state. It will be lifted at the same time. Further, when the thin sheet-like films 3 made of a dielectric material are laminated, static electricity naturally accumulates in these sheet-like films 3 and attracts each other, and the larger the contact area is, the larger the force acts. And separation becomes difficult.

In the present invention, the above effect is reduced by gradually widening the gap between the first film and the second film, and when the adsorbed film is curved with an appropriate radius, the rigidity of the film itself causes This is because the force to return to the original plane acts and the fact that bending makes the contact surface between the first sheet and the second sheet deviate, which facilitates separation.

2, 3 and 4 show the operating state of this embodiment. FIG. 2 shows the initial state, in which the hollow suction roller 9 is pressed against the upper surface of the sheet-like film 3 from above by a spring (not shown). In the initial state of FIG. 2, when the slit-shaped suction holes 26 on one generatrix of the cylindrical surface on the outer circumference of the suction roller 9 are made negative pressure by the suction means, the sheets in the film frame 20 that are stacked are stacked. The first sheet of the upper end of the film 3 is adsorbed.

Next, when the air cylinder 38 is contracted by air pressure,
The bearing plate 39 fixed to the tip of the rod of the air cylinder 38 moves. As shown in FIG. 3, the movement of the bearing plate 39 causes the intermediate spur gear 42 meshed with the rack 45 to rotate, and the spur gear 8 meshed with the intermediate spur gear 42 also rotates. At the same time, the suction roller 9 rolls on the upper surface of the sheet-shaped film 3 while the first sheet end portion is sucked onto the upper end of the sheet-shaped film 3. This rolling causes a gap between the first sheet and the second sheet of the sheet-shaped film 3 on the side of the suction roller 9 to form a gap.

Next, as shown in FIG. 4, the supply unit 50 connected to the rotating arm 37 is rotated about the axis of the rotating arm 37 by the rotating arm 37 so as to lift the suction roller 9 side.
By this operation, the gap between the first and second sheets of film 3 is gradually widened, and the first sheet of film 3 is separated from the second and subsequent sheets of film 3. At this time, since the suction hole 36a in the auxiliary suction board 36 has a negative pressure by suction means (not shown), the intermediate portion of the sheet-shaped film 3 is also sucked and the first sheet-shaped film 3 is supplied. It is completely fixed to the part 50. At this time the supply section
50 can be set at an oblique position or a vertical position with respect to the upper surface of the laminated sheet-like films 3 as necessary.

Next, the surface of the sheet-shaped film 3 fixed to the supply unit 50 is charged with static electricity by a static electricity adding device composed of a DC high-voltage generating circuit and needle electrodes, and the sheet-shaped film 3 is rotated by the rotating arm 37. Is moved to the molding die in the predetermined position. Here, the suction operation by the suction roller 9 and the suction holes 26, 36a of the auxiliary suction disk 36 in the supply unit 50 moved to the molding die is stopped by the switching means such as a valve, and conversely these suction holes 26 The sheet-shaped film 3 is inserted into a predetermined position in the molding die and affixed by blowing air from 36a. Since the molding die is grounded, the sheet-like film 3 charged by the static electricity applying device is firmly adhered and fixed to a predetermined surface of the molding die by a suction force by static electricity. Sheet film 3
When the sticking to the molding die is completed, the supply unit 50 moves to the position of the initial state shown in FIGS. 1 and 2, which is the upper surface on which the sheet-shaped film 3 is laminated by the rotating arm 37, for example. Stop.

The photoelectric switches 15a and 15b composed of a light emitting portion and a light receiving portion are for detecting the upper end surface of the laminated sheet films 3. When the laminated sheet-shaped film 3 is supplied to the molding die by the supply unit 50, the upper end surface of the laminated sheet-shaped film 3 is lowered, and the light of the light emitting unit 15a of the photoelectric switch is received by the light receiving unit. It is incident on 15b. As a result, the film base lifting motor 22 rotates in the direction of the arrow (FIG. 1) to move the rack 2 connected to the film base 16 upward. Therefore, the upper end surface of the laminated sheet-like films 3 is always kept at a constant height.

Incidentally, in the supply device of the present embodiment, in order to ensure the upper end surface of the laminated sheet-like film at a constant position, after the first sheet-like film is supplied to the molding die,
The film base 16 is temporarily lowered by the air cylinder 17 and then lifted up, and the film base 16 of this embodiment is configured to stop at the position where the photoelectric switches 15a and 15b are operated at this time.

When the supply unit 50 returns to the initial position and stops, the piston 18 is returned to the position having a certain distance from the film base 16, and the film base 16 is pushed up by the spring 35. The elastic force of the spring 35 at this time is
Since 18 is arranged with a certain distance from the film base 16, it is always constant regardless of the amount of lamination of the sheet-shaped film 3, and the pick-up operation of the sheet-shaped film 3 by the suction roller 9 and the auxiliary suction plate 36. Is assured.

In addition, in the above-described embodiment, the supply unit 50 for the sheet-like film 3 is used.
However, one rotary arm 37 is provided with two or more supply parts 50, and the sheet-like film 3 cannot be inserted and attached to two or more corresponding molding dies. It is feasible.

Further, although the sheet-shaped film 3 is described in the present embodiment, the present invention can be applied to other sheet-shaped objects.

[Advantage of the Invention] As described above, according to the present invention, the first sheet of the stacked sheet-like objects is gradually lifted from the end portion on the suction roller side, and the sheet-like article of the second sheet or less is surely removed. In addition to being able to separate, it is possible to separate and pick up difficult-to-separate sheet-like materials such as thin sheet films that are dielectrics, and firmly bond and fix them to the prescribed positions of the molding die. It will be possible.

Further, according to the present invention, the sheet-like material wound around the suction roller does not need to be bent greatly, and there is an effect that it can be used for a thick sheet or a material having high rigidity.

Further, according to the present invention, a suction device having a suction hole and a supply unit having a spur gear, an intermediate spur gear, a rack, a bearing plate and the like can be integrally driven so that a small-sized supply device having a simple mechanism can be provided. In addition to being able to obtain, it becomes possible to simultaneously feed two or more closely stacked sheet-like materials to corresponding positions.

[Brief description of drawings]

FIG. 1 is a perspective view showing a supply part of a sheet-like material supply device according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are operation explanatory views showing an operation state of the present invention, and FIG. FIG. 6 is a perspective view showing the structure of a conventional sheet-shaped material feeding device, and FIGS. 6, 7, and 8 are operation explanatory diagrams showing the operating state of the conventional sheet-shaped material feeding device. 3 is a sheet film, 8 is a spur gear, 9 is a suction roller, 37 is a rotating arm, 38 is an air cylinder, 39 is a bearing plate, 42 is an intermediate spur gear, and 45 is a rack. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A suction roller having a slit-shaped suction hole on at least one generatrix of a cylindrical surface, wherein the suction roller is arranged at one end on the first surface of a laminated sheet material. A moving mechanism for rotating the suction roller about its axis by a predetermined distance while sucking an end portion of the first sheet-like object by a suction hole of the suction roller, and provided in the moving mechanism. An auxiliary suction plate having at least one slit-shaped suction hole; the suction roller, the moving mechanism, and the auxiliary suction plate are integrally rotatable about a rotation axis parallel to the rotation axis of the suction roller. Feeding unit, tilting and raising the feeding unit from the upper surface of the stacked sheet-like objects to move the first sheet-like object adsorbed by the feeding unit to a predetermined position of a grounded molding die. Rotating mechanism, front A static electricity adding device for adding static electricity to the sheet-like material adsorbed to the supply part, and switching of air suction or blowing operation by the suction holes of the suction roller and the auxiliary suction plate in order to attract or stick the sheet-like material. Switching means for performing the above, and a sheet-like object elevating mechanism for always keeping the position of the first sheet in the laminated sheet-like objects constant and pressing the laminated sheet-like objects against the supply section at a constant pressure when desired. A device for feeding a sheet-like material, which is characterized by: