JP2917745B2 - Roll support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll supporting device used for feeding a resin film (sheet) from a roll in a bag making machine, for example.

[0002]

2. Description of the Related Art Conventionally, as this kind, there is one disclosed in Japanese Patent Application Laid-Open No. 63-72529. That is, a roll formed by winding a film (sheet material) is rotatably supported by a rewinding device (rolling device supporting device), and the rewinded film is intermittently transported by a feeding device, and each film is cut by a cutting device. Cut into bags.

At this time, as shown in FIGS. 4 and 5, a rewinding device 60 (roll body supporting device) is composed of a pair of front and rear rotatable rollers 61, and a roll body 62 is provided between both rollers 61. Supported. According to this, as the film 63 is intermittently transported by the delivery device, the roller 61 rotates to one side and the roll body 62 rotates to the other side, and the film 63 is smoothly delivered.

[0004]

However, in the above-mentioned conventional type, as shown by a virtual line in FIG.
Is shifted in the direction of the center axis 64 during the rotation, and a problem occurs that the fed film 63 meanders in the width direction.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a roll supporting apparatus which can prevent meandering of a sheet fed from a roll.

[0006]

In order to solve the above-mentioned problems, a roll supporting apparatus according to the present invention comprises a pair of supports for rotatably supporting both ends of a center axis of a roll formed by winding a sheet. Provided, these supports are movable in the direction of the central axis of the roll body, a driving device for moving one support is provided, and an urging tool for urging the other support in the one support direction is provided. a detection device for detecting the widthwise position of the sheet material fed from the roll body is provided, the driving instrumentation
The reciprocating rod is reciprocally movable by a motor,
And an L-shaped arm that swings with a rod.
One end of the arm is connected to the tip of the
A pair of free-moving cam rollers provided at the ends
It is fitted into the groove on the outer peripheral surface of the ring provided on
The cam roller idles by the rotation of the one support,
And, by the swing of the arm, the one support tool is
It is pushed and pulled by the cam roller,
It reciprocates .

[0007]

According to the above construction, after the roll is supported by the support, the sheet is sent out from the roll. On this occasion,
If the sheet to be fed is shifted to one side in the width direction, the detecting device detects the position shift of the sheet, and the driving device operates in response to the detection, and one of the supports moves to the other side of the center axis. At the same time, the other support is pushed through the roll body and moves to the other side against the urging force. As a result, the roll body moves to the other side of the center axis, so that the deviation to one side is corrected, and the sheet is sent out from the roll body to a proper position.

When the sheet is shifted to the other side in the width direction, one support moves to one side of the center axis, and the other support moves to one side by the urging force of the urging tool. . As a result, the roll body moves to one side of the center axis, so that the deviation to the other side is corrected, and the sheet is sent from the roll body to a proper position.

As described above, by moving the roll, it is possible to correct the widthwise deviation of the sheet sent out from the roll, so that the sheet can be prevented from meandering. The driving device is as follows
Operate. That is, the reciprocating rod is moved by the motor and
The swing of the arm causes one of the supports to move
It is pushed and pulled by the roller and moves in the direction of the center axis of the roll body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a roll supporting device provided in a bag making machine, which supports a roll 3 formed by winding a long film 2 as an example of a sheet material. This long film 2 is formed in a state where the tubular tube body is folded into a gusset shape, and the welded portion 4 and the perforated portion 5 are formed, and these are formed at predetermined pitches in the length direction. It is wound in a roll around a cylindrical core 6 in advance.

The roll supporting device 1 is mounted on a pair of left and right frames 7a and 7b provided in a bag making machine. That is, both frames 7a and 7b are provided with the roll body 3
A pair of supports 9 and 10 for rotatably supporting both ends of the central shaft 8 are provided. One of the supports 9 is located on one side of the center shaft 8 and is rotatable about the same axis 11 as the center shaft 8.
And a support block 13 connected and fixed to an inner end of the support block 12. The other support 10 is located on the other side of the center shaft 8 and has the same axis 14 as the center shaft 8, and a support shaft 15 attached to the inner end of the support shaft 15 and having a bearing 19
And a support block 16 which is rotatable about the same axis 14 through the support block 16.

The two support shafts 12, 15 are connected to the frames 7a, 7
b, is movably inserted in the direction of the central axis 8 in a housing 17 attached thereto. In addition, both support blocks 13, 16
Are formed so as to be able to be fitted into and removed from the openings 18 at both ends of the core 6 by moving the support shafts 12 and 15 in the direction of the central axis 8.

The movement of the one support 9 in the direction of the central axis 8 is performed by a driving device 21. That is, this drive
Reference numeral 21 denotes a reciprocating rod 23 which is reciprocally movable up and down by driving a motor 22, and an arm 24 which is swung by the reciprocating rod 23. The motor 22 is connected to one frame 7
The reciprocating rod 23 is attached to the outer surface of the a, and reciprocates the reciprocating rod 23 up and down via a gear mechanism (not shown). The arm 24 has a shape bent at a right angle, and the center of the arm 24 is connected to a pair of brackets 25 provided on the outer surface of one frame 7a in the left-right direction via a pin 26 (the center axis of the roll body 3). The arm 24 is connected to the lower end of the reciprocating rod 23 via a link 27. Also,
The other end of the arm 24 branches into two branches, and a pair of cam rollers 28 are attached to the opposing side surfaces in a freely rotatable manner. These cam rollers 28 are fitted in grooves 30 formed on the outer peripheral surface of a ring 29 that is externally fitted on the outer end of one support shaft 12. Reference numeral 31 denotes a dog that regulates the upper limit movement of the reciprocating rod 23. 32 is provided on one support shaft 12 via gears 33 and 34.
Is a gear motor for rotating.

The movement of the other support 10 in the direction of the central axis 8 is urged to one side by a spring cylinder device 37 which is an example of an urging tool. That is, the cylinder body 38 is mounted on the outer surface of the other frame 7b.
The compression coil spring 40 for biasing the piston rod 39 into and out of the main body 38 is built in the 38. The distal end of the piston rod 39 and the outer end of the other support shaft 15 are connected by a connecting plate 41.

An example of a detecting device for detecting a positional deviation of the long film 2 sent out from the roll body 3 in the left-right direction (in the direction of the central axis 8 of the roll body 3) above the two support members 9, 10. A light projector 43 and a light receiver 44 of the photoelectric switch are provided. The light projector 43 and the light receiver 44 are attached to a bracket 45 provided on the frames 7a and 7b and face each other, and are disposed on both sides of the long film 2 fed from the roll body 3 in front and rear directions of optical axes 46a and 46a. 46b are respectively formed.

In addition to the roll supporting device 1, a feeding device (not shown) for feeding the long film 2 from the roll 3 and the long film 2 are cut from the perforations 5 on the frames 7a and 7b. A cutting device (not shown) or the like is provided.

The operation of the above configuration will be described below.
First, the motor 22 is operated to lower the reciprocating rod 23 to the lower limit position. As a result, as shown by a two-dot chain line in FIG. Expanding. Then, after the roll body 3 is positioned between the two support blocks 13 and 16, the motor 22 is operated to reciprocate the rod.
Move 23 up. As a result, the arm
24 pivots about the pin 26 to the other, so that one support shaft
12 is pushed to the other side, and both support blocks 13 and 16 are fitted into the openings 18 at both ends of the core 6, respectively. Therefore,
The roll body 3 is sandwiched and supported by the two support members 9 and 10.

Thereafter, when the gear motor 32 operates, the one support shaft 12 is driven to rotate together with the support block 13, whereby the roll body 3 and the other support block are rotated.
16 rotates following. Further, by operating a delivery device (not shown), the long film 2 is intermittently delivered from the roll body 3 and cut from the perforated portion 5 by a cutting device (not shown) to form individual bags. Used.

At this time, when the long film 2 sent out from the roll body 3 is displaced to the other as shown by the dashed line (A) in FIG. 1, the other optical axis 46b is cut off. The displacement of the long film 2 is detected. Then, in response to this detection, the motor 22 is driven to move the reciprocating rod 23 downward. As a result, the arm 24 swings to one side as shown by the two-dot chain line in FIG. 1, so that one support shaft 12 is pulled out to one side and the support 9 moves to one side of the center axis 8. At the same time, the other support 10 moves to one side following the urging force of the spring cylinder device 37. As a result, the roll body 3 moves to one side of the central axis 8, so that the long film 2
Is corrected, and the long film 2 is sent out from the roll body 3 to a regular position. In addition, the blocked optical axis
When the light 46 b is received again by the light receiver 44, the motor 22 stops driving, so that the movement of the roll body 3 in the direction of the central axis 8 stops.

When the long film 2 sent from the roll body 3 is displaced to one side, one of the optical axes 46a is cut off, so that the positional deviation of the long film 2 is detected. Then, in response to this detection, the motor 22 is driven to move the reciprocating rod 23 upward. As a result, the arm 24 swings to the other side, so that one support shaft 12 is pushed to the other side, the support 9 moves to the other side of the center shaft 8, and the other support shaft 9 is moved to the other side via the roll body 3. Spring cylinder device with support 10 pushed
It moves to the other side against the urging force of 37. As a result, the roll body 3 moves to the other side of the center axis 8, the displacement of the long film 2 to one side is corrected, and the long film 2 is sent out from the roll body 3 to a regular position.

As described above, by moving the roll body 3 in the direction of the central axis 8, the displacement of the long film 2 fed from the roll body 3 in the width direction (the direction of the central axis 8) can be corrected. In addition, the long film 2 can be prevented from meandering in the width direction.

In the above-described embodiment, the long film 2 is described as an example of the sheet material. However, this may be paper, cloth, a vinyl sheet, or the like. In the above embodiment,
A motor 22, a reciprocating rod 23 and an arm 24 are provided as an example of a driving device 21 for moving one of the supports 9.
A cylinder device may be provided instead of the reciprocating rod 23 and 22.

[0023]

As described above, according to the present invention, when a shift in the width direction of the sheet fed from the roll body is detected by the detecting device, the driving device operates in response to the detection, and the two support members are moved. Since the roll body moves to the side opposite to the shift, the roll body moves in the center axis direction and to the opposite side to the shift, the shift in the width direction is corrected, and the sheet is sent from the roll body to a regular position.

As described above, by moving the roll body to the side opposite to the misalignment, the misalignment of the sheet material sent from the roll body in the width direction can be corrected.
It is possible to prevent the sheet material from meandering in the width direction. In addition, above
The operation of the driving device is as follows. That is,
The reciprocating rod moves with the arm and the arm swings.
One of the supports is pushed and pulled by the cam roller
Move in the direction of the central axis of the body.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a roll supporting device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of the roll body supporting device.

FIG. 3 is a side view of the roll body supporting device.

FIG. 4 is a side view of a roll supporting device in a conventional example.

FIG. 5 is a front view of a roll body supporting device in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll body support apparatus 2 Film (sheet material) 3 Roll body 8 Center shaft 9,10 Supporting tool 21 Drive device 37 Spring cylinder device (Biasing tool) 43 Projector (Detector) 44 Receiver (Detector)

Claims (1)

(57) [Claims] 1. A pair of supports for rotatably supporting both ends of a central axis of a roll formed by winding a sheet material are provided, and these supports are movable in the central axis direction of the roll. A driving device for moving the support is provided, an urging tool for urging the other support in the direction of the one support is provided, and a detecting device for detecting a position in a width direction of the sheet material sent from the roll body is provided. the drive apparatus, reciprocally movable reciprocally rod by the motor
And an L-shaped arm that swings with the reciprocating rod.
Is, one end of the arm is connected to the distal end of the reciprocating rod, a pair of idle freely baldness provided at the other end of the arm
Roller in the groove on the outer peripheral surface of the ring provided on one support
Fitted into said cam roller is free rotation by the rotation of one of the support above
And the swing of the arm causes the one support
Is pushed and pulled by the cam roller,
A roll support device reciprocating in a direction .