JP2545147B2 - Single-wafer machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention deforms the end portion of the uppermost sheet material of a plurality of stacked sheet materials and separates it from the sheet material of the next layer. Regarding leaf device.

[Prior Art] A sheet-fed device has been proposed in which the uppermost sheet material of a plurality of sheet materials is adsorbed and supplied to an apparatus or the like.

A conventional sheet-fed device 60 will be described with reference to FIGS.

As shown in FIGS. 5 to 7, the single-wafer mechanism 60 includes a first air cylinder 62 and a first air cylinder 62.
A support member 64 connected to the tip of the drive shaft 62A is provided. Further, at both ends of the support member 64, first suction members 68 are arranged with their suction surfaces facing downward and corresponding to the ends of the plurality of sheet materials 66.

The first suction member 68 is a slide shaft 70 supported by the support member 64 so as to be slidable in a direction perpendicular to the longitudinal direction of the support member 64, and a suction cup support member 72 fixed to the tip of the slide shaft 70. And a suction cup 74 to which the suction cup support member 72 is fixed, and a stopper 76 fixed to the suction cup support member 72. A compression coil spring 78 is externally fitted to the slide shaft 70 between the support member 64 and the suction cup support member 72.

Further, the limit switch 80 is fixed to the first support member 64, and the contactor 80A is arranged on the movement locus of the tip portion of the slide shaft 70. This limit switch 80
When the stopper 76 is pressed against the uppermost sheet material 66 by the operation of the first air cylinder 62 after the stopper 76 contacts the uppermost sheet material 66, the slide shaft 70 moves in the longitudinal direction of the support member 64. And a contact 80A is brought into contact with the tip end of the slide shaft 70 by moving in the direction perpendicular to the air cylinder to detect the operation stop position of the air cylinder.

Further, two second air cylinders 82 are fixed to the middle portion of the support member 64. The drive shaft 82A of the second air cylinder 82 penetrates through the support member 64 and projects toward the suction cup 74, and a second suction member 84 having the same structure as the first suction member 68 is arranged at the tip end portion. Has been done. This second suction member
A suction cup support member 86 having the same structure as the suction cup support member 72 is fixed to the tip of the drive shaft 82A of the air cylinder 82.
The suction cup support member 86 has the same construction as the suction cup support member 72.
88 and stopper 90 are fixed. There may be a case where two or more second air cylinders 82 are provided.

In the single-wafer mechanism 60 having the above-described structure, the first air cylinder 62 operates and the drive shaft 62A descends from the state shown by the solid line in FIG. When the drive shaft 62A of the air cylinder 62 descends, the support arm 64 moves downward and the stopper 76 contacts the uppermost sheet material 66 of the plurality of sheet materials 66. As shown in FIG. 6, when the first air cylinder 62 is further operated, the slide shaft 70 moves in the axial direction, the tip end contacts the contactor 80A, and the stopper 90 causes the surface of the uppermost sheet material 66 to contact. Abut. In this state, the suction cup 88 also contacts the surface of the uppermost sheet material 66.

The operation stroke of the first air cylinder 62 is determined by the stoppers 76 and 90, and from this state, negative pressure is supplied to the suction cups 74 and 88. As a result, the uppermost sheet material 66 is adsorbed.

Next, the operation of the air cylinder 62 is temporarily stopped, the air cylinder 82 operates in the extending direction, and the air cylinder
When air is supplied so that 62 operates in the reverse direction,
As shown in the figure, the drive shaft 62A rises to separate both ends of the uppermost sheet material 66 from the next layer sheet material 66. The drive shaft 82A detects the auto switch 82B attached to the air cylinder 82 at a place where it extends a certain length. The operation of the air cylinder 62 is stopped by this detection signal, and air is blown from the vicinity of both ends of the uppermost sheet material 66 to the next layer sheet material 66 by a nozzle (not shown) to ensure separation of the uppermost sheet material 66. .

[Problems to be Solved by the Invention] However, in the above-described conventional single-wafer apparatus, the amount of flapping varies with the detection of the auto switch 82B and the air cylinder 6
2 Depends on the linear velocity variation. Therefore, it is not possible to add a constant amount of flapping.

Furthermore, in the conventional single-wafer apparatus, two (two or more) are used to move the second suction member, resulting in high cost.

Further, since the stop position of the first air cylinder is detected by the limit switch, an error occurs in the stop position of the first air cylinder due to the deviation of the detection timing. Therefore, the amount of tilt of the sheet material changes. Therefore, there is a problem that the uppermost sheet material cannot be stably separated from the next layer sheet material.

In consideration of the above facts, the present invention can always add a certain amount of tilt when separating the uppermost sheet material from the next layer sheet material, and stably stabilize the uppermost sheet material in the next layer sheet material. It is an object to provide a single-wafer device that can be separated from

[Means for Solving the Problems] In order to achieve the above object, according to the present invention, a first supporting member that supports an adsorbing member and a protrusion of the first air cylinder by contacting the adsorbing member and the uppermost sheet material. It is characterized in that a second support member having a pressing member for preventing the above and a second air cylinder capable of moving the first support member with respect to the second support member by a predetermined distance are provided.

[Operation] According to the present invention having the above configuration, when the first support member moves toward the uppermost sheet material by the driving of the first air cylinder, the first suction member supported by the first support member. And the second support member and the second suction member supported by the second support member approach the surface of the uppermost sheet material. In this case, the drive shaft of the first air cylinder is adjusted to have a stroke length that allows the first and second suction members to suck the uppermost sheet material of the stacked sheet materials. The second supporting member is provided with a pressing member that comes into contact with the uppermost sheet material to forcibly prevent the first air cylinder from projecting and stop.

When the first adsorbing member and the second adsorbing member approaching the surface of the uppermost sheet material adsorb the uppermost sheet material, the second air cylinder operates in the extending direction to move the first supporting member to the first supporting member. It is moved a predetermined distance from the second support member. As a result, the edge of the sheet material is deformed and a tilt is applied. At this time, air can be blown from the end portion provided with the tilt to further ensure the separation from the sheet material of the next layer. Next, the second air cylinder operates in a contracting direction so that the first support member approaches the second support member, and
The first air cylinder operates to move the first suction member and the second suction member that have sucked the uppermost sheet material in the direction away from the next layer sheet material. The pressure supplied to the first air cylinder in this case may be any pressure required to lift the first and second support members, the first and second suction members, and one sheet material. .. By this operation, the uppermost sheet material is separated from the next layer sheet material.

In the first air cylinder, the suction member and the pressing member are brought into contact with the surface of the uppermost sheet material without using a detecting means such as a micro switch, and the pressing member forcibly stops the lowering of the first air cylinder. Therefore, the stop position does not have an error, and the amount of flapping given by the second air cylinder with respect to the stop position of the first air cylinder is always constant. Can be reliably separated.

In addition, even if the number of stacked sheet materials decreases and the operating stroke of the first air cylinder changes, the second air cylinder always operates with the position of the uppermost sheet material as a reference. Is constant, and the uppermost sheet material can be stably separated from the next layer sheet material.

Further, in the present invention, since one second air cylinder is used, the cost can be reduced.

[Embodiment] FIGS. 1 to 4 show an embodiment of a sheet feeding apparatus 10 according to the present invention. FIG. 1 is a front view, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 are operation views.

As shown in FIGS. 1 and 2, the sheet-fed device 10 is provided with a base plate 12, and the base plate 12 is a device to which the sheet-fed device 10 is applied (for example, a photosensitive planographic printing plate is used). A pair of mounting portions 14 to be mounted on a PS plate auto feeder for supplying to a printing apparatus or the like are provided at both ends.

A first air cylinder 16 having a drive shaft facing downward is provided at an intermediate portion on one surface (front surface in FIG. 1) of the base plate 12 and has a substantially L-shaped cross section.
It is fixed at 18. The tip portion of the drive shaft of the first air cylinder 16 penetrates the suction cup support bar 20 which is the first support member arranged in the lower part of the air cylinder, and is arranged below the suction cup support bar 20. Is connected to the intermediate portion of the pressing bar 22 which is the second supporting member.

Guide rods 24 are arranged on both sides of the first air cylinder 16. This guide rod 24 has a substantially L-shaped cross section.
It is supported on the base plate 12 by a character-shaped bracket 26. The guide rod 24 penetrates the linear ball bearing 20a supported by the suction cup support bar 20, and its tip end is connected to the pressing bar 22.

A second air cylinder 46 is arranged in the middle of the suction cup support bar 20. The drive shaft of the air cylinder 46 passes through the suction cup support bar 20, and the tip end is connected to the pressing bar 22. The operation of the second air cylinder 46 causes the suction cup support bar 20 to move away from or approach the pressing bar 22.

Therefore, the suction cup support bar 20 and the pressing bar 22 are moved downward in FIG. 1 by the operation of the first air cylinder 16.

The suction cups 28 and 30 are arranged on both sides of the suction cup support bar 20 in the longitudinal direction. A suction cup support portion 28A of the suction cup 28 is supported by penetrating the suction cup support bar 20, and the suction surface is located downward.
A negative pressure is supplied to the suction cup 28 from a negative pressure supply means (not shown).

The suction cup 30 is attached to the moving bracket 32 which is slidably supported in the longitudinal direction at the end of the suction cup support bar 20.
Are pierced and supported, and the suction surface is located downward. The suction cup 30 can cope with the case where the length of the attracted member, for example, the PS plate, in the width direction is different due to the movement of the moving bracket 32 in the longitudinal direction.

In addition, between the guide rod 24 of the suction cup support bar 20, the suction cup 34,
36 are arranged. In these suction cups 34 and 36, suction cup support portions 34A and 36A respectively penetrate the suction cup support bar 20 and are supported by the pressing bar 22, and the suction surface is located below the pressing bar 22. Therefore, when the suction cylinder support bar 20 and the pressing bar 22 are moved downward by the operation of the air cylinder 16, the suction cups 34 and 36 are moved downward and come into contact with the surface of the uppermost sheet material, for example, the photosensitive lithographic printing plate. These suckers 34,
Negative pressure is supplied to 36 by negative pressure supply means (not shown), and the uppermost sheet material is adsorbed.

Also, air nozzles 38, 40 are provided on both sides of the sucker support bar 20.
Is arranged. The air nozzle 38 is supported by the suction cup support bar 20 through a bracket 42, and the suction cup 40 is supported by a moving bracket through a bracket 44. These air nozzles are provided so as to project in the direction in which they contact each other, and air is ejected in the direction in which they contact each other.

Four pressing members 48 are attached to the lower surface side of the pressing bar 22. These pressing members 48 are made of rubber and contact the attracted member.

 Next, the operation of this embodiment will be described.

In the initial state, as shown in FIG. 1, the drive shaft of the second air cylinder 46 is pulled into the main body, and the suction cup support bar 20 and the pressing bar 22 are close to each other. First
The drive shaft of the air cylinder 16 is pulled into the main body, and the suction cup support bar 20 and the pressing bar 22 are moved to the upper portion, that is, the base plate 12 side.

From this state, the first air cylinder 16 operates,
When the drive shaft projects from the inside of the main body, the suction cup support bar 20 and the pressing bar 22 move downward. In this case, the drive shaft of the first air cylinder 16 is adjusted so as to have a stroke length only capable of adsorbing the uppermost sheet material of the laminated sheet materials, and is supplied to the first air cylinder 16. The pressure to be applied may be any pressure required to lower the first and second support members, the first and second suction members, etc., and is, for example, about 2 kg / cm ² . As shown in FIG. 3, when the drive shaft of the air cylinder 16 projects, the pressing member 48 of the pressing bar 22 abuts the sheet material 50 and the suction cups 28, 30,
34 and 36 contact the surface of the sheet material 50. At this time, the pressing member 48 forcibly prevents the drive shaft of the first air cylinder 16 from descending. When the suction cups 28, 30, 34, 36 come into contact with the surface of the sheet material, negative pressure is supplied to the suction cup by negative pressure supply means (not shown), and the suction cups 28, 30, 34, 36 adsorb the sheet material 50.

With the suction cups 28, 30, 34, 36 adsorbing the sheet material 50,
The second air cylinder 46 operates based on this position to move the suction cup support bar 20 upward. As a result, the end portion of the sheet material 50 is bent upward as shown in FIG. From this state, air is blown below the sheet material 50 from the air nozzles 38, 40 to separate the sheet material 50 from the sheet material 50 located below the sheet material 50, and thereafter, the drive shaft of the first air cylinder 16 is Since the drive shaft of the second air cylinder 46 is also drawn into the main body at the same time as it is drawn into the main body, the separated sheet material 50 returns from the agitated state to the horizontal state and the suction cups 28, 30, 34, 36. Is moved upward by. In this case, the pressure supplied to the first air cylinder 16 is the pressure required to lift one sheet material such as the first and second support members, the first and second suction members, and the like. Well, for example, about 5 kg / cm ² .

As described above, the uppermost sheet material 50 is separated from the next layer sheet material.

In this embodiment, a single second air cylinder 46 sucks
Since the 34 and 36 are moved, the operation timing of the suction cups 34 and 36 does not shift as in the conventional case, and the adjustment is easy.

Moreover, since the second air cylinder is single, the cost can be reduced.

Further, unlike the conventional case, the first air cylinder 16 is forcibly stopped by the pressing member 48 without using the limit switch. The sheet material can be adsorbed in the abutting state, and the second air cylinder 46 is operated with this position as a reference, so that the amount of tilt of the sheet material 50 can be made constant.

In this embodiment, the example of the photosensitive lithographic printing plate is shown as the sheet material, but the present invention is not limited to this, and the present invention can be applied to the case of sheeting other sheet materials.

Further, in the present embodiment, the example of the suction cups 28, 30, 34, 36 is shown, but the present invention is not limited to this, and the number of suction cups may be two or more.

[Effects of the Invention] As described above, in the present invention, since the second air cylinder is operated with the stop position of the first air cylinder as a reference, the amount of fluttering of the uppermost sheet material is always constant, and this maximum The upper layer sheet material can be separated from the next layer sheet material.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a sheet feeding apparatus according to the present invention,
FIG. 2 is an exploded perspective view showing the sheet feeding device, FIG. 3 is a front view showing a state where the sheet feeding device adsorbs the sheet material, and FIG. 4 is a front view showing a state where the sheet material is tilted. 5 to 7 are front views showing a conventional single-wafer apparatus. 10 …… Sheet feed device, 16 …… First air cylinder, 20 ……
Sucker support bar (first support member), 22 ... Holding member (second support member), 28, 30, 34, 36 ... Sucker, 46 ...
Second air cylinder, 50 ... Sheet material.

Claims (1)

(57) [Claims] 1. A first adsorbing member for adsorbing opposite ends of a top sheet material of a plurality of sheet materials, a first supporting member for supporting the first adsorbing member, and the first adsorbing member. A second adsorbing member that adsorbs an intermediate portion of the uppermost sheet material when adsorbing the uppermost sheet material of the adsorbing member, a second supporting member that supports the second adsorbing member, and A first air cylinder for moving the first support member and the second support member toward and away from the uppermost sheet material; and a first air cylinder supported by the second support member to contact the uppermost sheet material. A pressing member for coming into contact with the first air cylinder to forcibly prevent the first air cylinder from projecting; and a second air cylinder for separating the first support member from the second support member. Single wafer device.