JPS61188341A - Sheet take-out device - Google Patents

Abstract

PURPOSE:To prevents sheets from rubbing with each other to surely separate those from each other, by providing on each of slide members, a rotary shaft which rotates in association with the reciorocating motion of the slide member, and by attaching a sheet sucker onto each of the rotary shafts. CONSTITUTION:After a first sheet 11a is absorbed under the action of suckers 16, 17, a motor 19 is driven to retract a T-like lever 35 along a guide groove 37a by means of a coupling lever 34. Thereafter, during retraction the T-like lever 35 is retracted while its tail being oscillating, since a pin 41 planted the lever 35 is guided along a cam groove 42a. Therefore, slide members 45, 46 retracts while they are alternately retarded. At this time since pinions 51, 52 are moved while they are meshed with racks 49, 50, the suckers 16, 17 are rotated in the direction of the arrow. By making the distance of the rotational movement coincident with the distance of the retraction, the first sheet 11a alone is tuned up without sheets rubbing with each other. Thereby it is possible to separate sheets from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet take-out device for separating and taking out sheets one by one using a suction cup.

[Conventional technology]

BACKGROUND OF THE INVENTION Seal extraction devices that utilize a suction-type suction cup connected to a vacuum source are widely known. When handling sheets with rough surfaces, it is easy to separate the sheets, so press the suction cup against the topmost sheet among the many stacked sheets, and then retreat straight away. You can take out the sheets one by one by simply letting the machine move. However, like sheet photographic film,
Since the surface of plastic sheets is smooth, two sheets may be taken out together while remaining overlapped. This sheet separation uses a screw.

It is known that giving the sheet reciprocating motion, curving, squeezing, pausing, etc. can be effective, and in order to give such effects, several products have been proposed in which the suction cup makes special movements. ing. For example, you can make the trajectory of the suction cup into a gentle S-shape, place the suction cup inside the magazine, and suck the topmost sheet slightly closer to the center than the edge, and then move the suction cup back to the outside of the magazine. There is one in which the suction cup is inserted to the top of the magazine again, and then the suction cup is retracted to the outside of the magazine. Another method is
Although the trajectory of the suction cup is a straight line, there is one in which the movement of the suction cup is temporarily stopped when the suction cup reaches the top of the magazine, and then the suction cup is inserted all the way into the magazine and then moved back. In these methods, since the suction cup alone cannot provide sufficient curving action to the sheet, brushes, etc. are provided on the sides of the magazine, and a rod is installed across the center of the magazine to bend the sheet across the width of the sheet. By hooking the sheet onto a brush and placing the center part of the sheet against a stick, the part that is sucked by the suction cup swells.

However, with the above-described method of moving the suction cup, there is a problem in that the sheet sucked by the suction cup is lifted while sliding on the sheet below, resulting in damage to the sheet. Furthermore, in order to give the sheet a curving effect, the sheet is pressed against a rod, and the sheet is rubbed against it while the rod passes through the rod, so scratches also occur at this time. Such scratches not only reduce the commercial value of the sheet, but also cause a significant deterioration in image quality, especially in microphotographic films in which images are recorded at a high reduction rate. Furthermore, pressure cracks may occur in the parts of the receiver that have been rubbed by the rod.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet take-out device that prevents scratches caused by sheets rubbing against each other when separating sheets, and that can reliably separate and take out sheets one by one. It is something.

[Means for solving the problem] In order to achieve the above object, the present invention provides the following steps when separating sheets:
The suction cup is moved back and forth almost parallel to the seat surface, and the suction cup is rotated in conjunction with this movement. As the suction cup rotates/retreats and rotates/advances, the end of the sheet is lifted as if it were turned over, so the sheets do not rub against each other, and moreover, a bending action (curving action) is imparted to the sheet. , it becomes possible to reliably separate the sheets.

The suction cup is of a suction type connected to a vacuum source in order to facilitate adsorption and release of the sheets so that the sheets do not come into close contact with each other, and in the case of photographic film, to prevent pressure fog from occurring. . Since this suction cup needs to be placed in the magazine when taking out sheets, at least one of the suction cup and the magazine is made retractable so that the two can be moved relative to each other.

The suction cup can be moved backward by attaching the suction cup to a sliding member that moves linearly, and the suction cup can be rotated by a cam mechanism, a rack gear mechanism, or the like.

Although one suction cup may be used, it is preferable to use two suction cups when handling sheets with high adhesion.

In this case, the two suction cups can be moved backward alternately at a slow speed to apply a squeezing action to the sheet.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

〔Example〕

In FIG. 3 showing the sheet take-out device of the present invention, a box-shaped magazine 10 is arranged horizontally, and a large number of sheets 11 are stored therein. In this example,
The sheet 11 is a microfilm, and a photosensitive layer is formed on a thin polyethylene terephthalate (PET) support. This magazine 10 is moved up and down by a lifting mechanism 12 every time the topmost magazine 11a is taken out.

A movable table 15 is arranged above the magazine 10 so as to be movable laterally. As shown in detail in FIG. 1, a sheet separation mechanism 18 whose main parts are two suction cups 16 and 17 is attached to the movable table 15. These suction cups 16, 17 are reciprocated by the motor 19 and rotated independently of each other to separate the uppermost sheet 1-11a from the others without causing the sheets to rub against each other. This reciprocation of suction 1116.17 is detected by the microswitch 20.

A sensor pin 22 that is movable in the axial direction is provided on the movable table 15 so as to protrude downward, and when the lower end of this sensor pin 22 comes into contact with the topmost sheet lla in the magazine 10, , the upper limit switch 23 is turned on at its upper end. Further, when the magazine 10 is lowered when taking out a sheet, the lower limit switch 24 is turned on at a portion thereof. These limit switches 23, 2
4. The signal from the microswitch 20 is sent to the controller 25. This controller 25 is
Lifting mechanism 12. In addition to controlling the operation of the motor 19, it also controls a motor 28 for rotating the feed screw rod 27.

The feed screw shaft 27 extends in a direction perpendicular to the moving direction of the magazine 10, and a guide rod 29 extends in parallel thereto.
is placed. The feed screw shaft 27 and the guide rod 29 pass through the brackets 15a and 15b of the moving table 15, respectively, and when the feed screw rod 27 rotates, the moving table 15
moves horizontally along the guide rod 29 and reaches the top of the exposure table 30. After releasing the sheet 11, the suction cups 16, 17 return to the top of the magazine 10 and prepare for the removal of the next sheet 11.

FIG. 1 shows a sheet separation mechanism which is the essential part of the present invention. A disc 32 is fixed to the rotating shaft 19a of the motor 19, and one end of a connecting lever 34 is connected to the disc 32 via a pin 33. This connecting lever 32
In order to detect one reciprocating movement, a recess 32a is formed on the outer periphery of the disk 32, and the microsinch 20 is turned on by this recess 32a.

The tip of the connecting L-bar 34 is placed on top of the T-shaped lever 35 and connected with a pin 36.

The upper end of this pin 36 is loosely fitted into a guide groove 37a formed in the plate 37. Two elongated holes 35a and 35b are formed at both ends of the T-shaped lever 35, and pins 39 and 40 are loosely fitted into these holes, respectively. The TI lever 35 also has a pin 41 that protrudes downward.
is formed, and this pin 41 is loosely fitted into a jagged cam groove 42a formed in the cam plate 42. When the T-shaped lever 35 is moved backward by the connecting lever 34, the T-shaped lever 35 swings backward using the pin 36 as a fulcrum due to the cooperative action of the cam groove 42a and the pin 41, thereby causing the pin 39. 40 alternately speeds up (and slows down).

The pin 39.40 is an L-shaped slide member 45.
46 are planted respectively. This slide member 45
．． 46 is slidably held by guide rods 47 and 48 arranged in the same direction as the guide groove 37a of the plate 37. In addition, a rack 49 is parallel to this guide rod 47, 48.
．． 50 are arranged respectively, and a binion 5 is placed on these
1.52 are in mesh with each other. These pinions 51 and 52 and gears 53 and 54 that mesh with these pinions, respectively, are as follows:
It is rotatably attached to slide members 45 and 46. The rotation of the gear 53.54 is transmitted to the exhaust pipe 57.58 via the rotating shaft 55.56. The suction cup 16.17 is attached to the tip of this exhaust vibrator 57.5B, and the air inside the suction cup 16.17 is connected to a vacuum source (not shown).
It is evacuated and created negative pressure.

The suction cups 16 and 17 move backward while rotating, and it has been experimentally confirmed that sheet separation can be ensured if the rotation angle is set to 60 to 90 degrees. In this embodiment, the slide member 45.46 is adapted to retract until the suction cup 16.17 reaches 90 degrees.

Next, the operation of the above embodiment will be explained with reference to FIG. First, a magazine 1 containing a large number of sheets 11
0 is raised by the lifting mechanism 12. This magazine 1
When the sensor bin 22 is pushed up by the uppermost seat lla during the rise of 0, the operation of the elevating mechanism 12 is stopped in order to turn on the upper limit switch 23.

As a result, the magazine 10 stops rising, and
The uppermost sea 1-11a is attracted by the suction action of the suction cups 16 and 17.

Next, the controller 25 rotates the motor 19.

When the motor 19 rotates, the T-shaped lever 35 is moved back along the guide groove 37a via the connecting lever 34.

During this retreat, the T-shaped lever 35 retreats while swinging because the pin 41 installed therein is guided by the cam groove 42a.

As a result, the slide members 45, 46 move backward while alternately slowing down, and at this time, the pinions 51, 52 mesh with the racks 49, 50 and move, so that the suction cups 16, 17 rotate in the arrow direction. By matching this rotational movement distance with the backward movement distance, it is possible to separate the sheets by targeting only the uppermost sheet lla without rubbing the sheets together.

The rotational movement of the suction cups 16,17 is shown in FIG. When the magazine 10 rises to the predetermined position, (A
), the suction cups 16 and 17 are both perpendicular to the sheet surface and attract the adjacent sheet 11a. Then T
Since the shape lever 35 moves backward while dancing, one of the suction cups 16 moves back quickly, and as shown in (B), the suction cup 1
6 has a larger rotation angle. This time, T-shaped lever 3
5 swings in the opposite direction, the rotation angle of the suction cup 17 increases as shown in (C). Next, as shown in ('D), the rotation angle of the suction cup 16 increases, and finally (E)
As shown in FIG. 2, the two suction cups 16 and 17 are rotated 90 degrees, and the T-shaped lever 35 reaches the retracted position and stops retracting.

In the state shown in FIG. 2(E), the rotary plate 32 has rotated 180 degrees, so when the rotary plate 32 further rotates 180 degrees, the T-shaped lever 35 moves forward while dancing (D
), (C), and (B) before returning to state (F). Due to the movement of this suction cup, the sheet 11. ]・1:
, l, bending, squeezing, pausing, reciprocating, and screwing are applied to ensure sheet separation. When this T-shaped lever 35 returns to its initial position, the microswitch 20
Since one rotation of the motor 2 is detected, the rotation of the motor 19 is stopped. When the T-shaped lever 35 returns to its initial position, the elevating mechanism 12 operates to lower the magazine 10. In addition,
The magazine 10 may be lowered after the T-shaped lever 35 returns to its initial position.

When the magazine 10 descends to the position where the lower limit switch 24 is turned on, the controller 25 turns the motor 2
Rotate 8. This motor 28 rotates the feed screw shaft 27, so that the movable table 15 horizontally moves to the position shown by the two-dot chain line and reaches above the exposure table 30, where the suction cup 16.
17 is released from suction, and the sheet lla is placed on the exposure table 30.

After releasing the sheet lla, the motor 28 is reversed, so that the carriage 30 returns to the position above the magazine 10 again.

If the sheet lla is soft, if only the end of the sheet 11a is suctioned, the other end will hang down, causing friction between the sheet and the mechanical parts. To prevent this, it is preferable to curve the seat lla by tilting the suction cups 16, 17 inward as shown in FIG.

In the embodiment described above, the magazine 10 is arranged horizontally, but it may also be arranged diagonally. In this case, the slide members 45, 46 are reciprocated obliquely.

〔Effect of the invention〕

In the present invention having the above configuration, since the suction cup is configured to move backward while rotating, the sheets do not rub against each other when the sheets are separated. Therefore, the sheets can be reliably separated without causing scratches on the sheets.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a sheet separation mechanism which is a main part of the present invention. FIG. 2 is an explanatory diagram showing the movement of the suction cup during sheet separation. FIG. 3 is a schematic diagram showing the sheet take-out device of the present invention. FIG. 4 is an explanatory diagram showing an embodiment in which the suction cup is tilted inward to prevent the sheet from sagging. lO... Magazine 11... Sheet 11a... Separated sheet 15... Moving table 16.17... Suction cup 18... Sheet separation mechanism 30... Exposure table 34... Connection lever 35... T
Lever 42...Cam groove 45.46...Slide member 49.50...Rack 51.52...Pinion 53.54...Gear. 55.56...Rotation axis.

Claims (6)

[Claims] (1) A sheet that uses a suction type suction cup that is movable relative to the magazine to suck and take out the topmost sheet among the many sheets stacked in the magazine. In the take-out device, a slide member is provided that moves substantially parallel to the sheet surface from one end of the sheet to the other end, and a rotating shaft extending in a direction perpendicular to the moving direction of the slide member is attached to the slide member; In addition to attaching the suction cup to this rotation shaft, a rotation mechanism is provided to rotate the rotation shaft in conjunction with the movement of the slide member, and by reciprocating the slide member between the initial position and the retreated position, the edge of the seat A sheet retrieval device characterized in that a suction cup that adsorbs a sheet moves while rotating. (2) The sheet take-out device according to claim 1, wherein the rotational movement distance of the suction cup and the backward movement distance of the slide member match. (3) The rotation mechanism is characterized by comprising a rack extending in the direction of movement of the slide member, a pinion that meshes with the rack, and a gear that is fixed to the rotating shaft and meshes with the pinion. A sheet take-out device according to claim 1. (4) Claim 3, characterized in that two slide members are provided side by side, suction cups are attached to each of these slide members, and the slide members are configured to move backward while rotating independently. Sheet take-out device. (5) The two slide members are connected to both ends of the T-shaped lever, and prevent the T-shaped lever from moving backward while swinging horizontally around the middle of these two connecting points. A sheet take-out device according to claim 4. (6) The sheet take-out device according to claim 5, wherein the magazine moves away from the slide member when the slide member advances toward the initial position.