JP2000072297A - Rolling device in equipment for manufacture perforated rolled bag made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winder capable of smooth winding without disconnection and having good operation even for a perforated bag-forming tube having many perforated cut parts and allowing easy disconnection in use. SOLUTION: This roll winder is provided with: a winding receiving roller 51 for winding a perforated bag-forming tube 1a having perforations and a sealed part and rotated at the same peripheral velocity as the carrying speed of the tube 1a; a winding shaft upwardly downwardly parallel movably installed at the upper side of the winding receiving roller 51 and having a demountable winding core at its outer boundary; and a winding auxiliary roller 52 placed at the upper side of the winding shaft in parallel, upwardly downwardly parallel movable, downwardly energized and rotated at the same or slightly higher peripheral velocity as or than the peripheral velocity of the winding receiving roller 51. The perforated bag-forming tube 1a is wound on the outer boundary of the winding core mounted on the winding shaft, and placed on the winding receiving roller 51. The winding auxiliary roller 52 is abutted to the upper side surface of the perforated bag-forming tube 1a for winding operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin material, such as polyethylene, which is continuously formed into a cylindrical shape, and is stretched to a thin film shape.
A roll winding device in an apparatus for manufacturing a perforated rolled synthetic resin bag for winding a perforated bag processing tube formed with a heat fusion seal portion into a roll shape.

[0002]

2. Description of the Related Art In general, this type of perforated roll-wound synthetic resin bag manufacturing apparatus comprises a synthetic resin tube formed by stretching a synthetic resin tube extruded into a cylindrical shape to a required thickness. As shown in FIG. 7, the tube 1 is formed into a band to form a seal portion 2 forming a bag bottom in the width direction, and then a perforation 3 for cutting is formed in parallel with the seal portion 2 as shown in FIG. This is wound into a roll.

[0003] In the conventional perforation forming of this type of apparatus, for example, as shown in FIG. 8, a continuously fed tube 1 is wound around a metal receiving roll 10 and continuously fed. A perforation is formed by hitting the moving rotary cutter 11 against a metal perforation receiving roll 10, and similarly, the tube 1 wound around the metal sealing receiving roll 12 is used for sealing. The seal portion 2 is formed by rotating and pressing the heater 13. The winding device 1 winds the perforated bag processing tube 1a thus processed.
4 to wind up.

In this type of conventional winding device, a cylindrical winding core 16 is fixed to a winding shaft 15 by screws or the like, a tube 1a is wound therearound, and the winding shaft 15 is connected to a torque converter by a motor. Forced rotation through
Winding is performed while adjusting the tension constant.

[0005]

In such a conventional winding apparatus, it is difficult to adjust the tension applied to the perforated bag processing tube at the time of winding, so that the tension applied to the tube has to be increased. Therefore, cutting tends to occur during winding, and in order to eliminate this cutting, the proportion of the part cut by perforation must be reduced, and if a large cutting force is required during use, There was a compelling problem.

The present invention has been made in view of such a conventional problem,
Even if the perforated bag processing tube has a large percentage of perforated cut portions and can be easily cut during use,
Smooth winding is possible without causing cuts,
Moreover, it is intended to provide a winding device with good operability.

[0007]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
The synthetic resin tube is sequentially conveyed by a plurality of feed rollers,
Along with forming a perforation for cutting on the tube during the conveyance, a perforated bag processing tube having a seal portion formed in parallel with the perforation is wound up sequentially in a roll shape around the core. In the roll winding device in the apparatus for manufacturing a rolled synthetic resin bag with perforations to be formed, the perforated bag processing tube formed with the perforations and the seal portion is wound around at the same week speed as the transport speed of the synthetic resin tube. A winding take-up roller having a rotating take-up roller, a take-up shaft having a take-up core detachably mounted on an upper side of the take-up take-up roller and being parallel to the roller and capable of moving vertically up and down; It is arranged on the upper side in parallel with this and is vertically movable so as to be able to move up and down and is urged downward. A winding auxiliary roller which is rotated at a slightly higher peripheral speed, and the perforated bag processing tube is wound around the outer periphery of a winding core mounted on the winding shaft, and is placed on the winding receiving roller, The winding assist roller is brought into contact with the upper surface thereof to perform a winding operation.

It is preferable that both ends of the take-up shaft are fitted to a vertically oriented guide so that the take-up shaft can be moved vertically, and that both ends can be inserted and removed from above the guide.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
Referring to FIG.

FIG. 1 shows a schematic configuration of an apparatus for manufacturing a rolled bag with perforations using a winding apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a synthetic resin tube, 20 denotes a perforation forming apparatus, 40 is a heat sealing device,
50 is a winding device.

The perforation forming apparatus 20 includes a hollow cylindrical perforation roller 21, and a pair of collapsible rollers for moving the synthetic resin tube 1 sequentially fed around the perimeter of the perforation roller 21. 22, 22 are installed at intervals in the circumferential direction.

As shown in FIG. 2, the perforated roller 21 is
A fixed shaft 23 is passed through the center, is rotatably supported on the outer periphery thereof, and is rotated by a motor via a gear. The rubbing rollers 22 are also driven to rotate in the same manner.
The peripheral velocities of 1, 2, 22 are set to be the same.

A perforation cutter 24 is provided in the perforation roller 21 so as to be able to move in and out in the radial direction. As shown in FIGS. 3 and 4, the cutter 24 has a large number of cutting blades 25 each having a mountain-shaped tip, which are arranged in a line. The cutting blades 25 protrude from the outer periphery of the perforated roller at a predetermined rotation angle position. 1, and a perforation 3 is formed.

The cutter 24 is replaceably fixed to a cutter support 26. The cutter 24 is installed so as to be reciprocally movable in a roller radial direction in a slide guide 27 of the support 26, and is protruded at a fixed position by a cutter in / out operation means 30. It has become so.

The cutter access operation means 30 includes a fixed cam 31 provided on a fixed shaft 23 at the center of the perforation roller 21.
, A cam follower 32 fixed to the cutter support 26, and a return spring 33 for urging the cam follower 32 toward the cam. Each time the perforation roller 21 rotates, the cam follower 32 Is extruded, the cutter 24 protrudes from the outer peripheral surface of the roller, breaks through the tube 1 wound around the outer periphery of the roller, and a perforation 3 is formed.

In this perforation forming apparatus, the perforation cutter moves in and out of the tube at a position where the synthetic resin tube is continuously conveyed and is wound around the perimeter of the perforation roller to form a perforation in the tube. With this configuration, when forming a perforation by projecting the cutter, it can be performed without applying any tension to the synthetic resin tube. Therefore, even if the ratio of the cut portion of the perforation is increased, the perforation processing is performed. There is no breakage inside, and since it can be processed during the continuous transport of the tube, it is possible to send at high speed,
Work efficiency is high.

Further, since the cutter projects from the inside of the perforated roller around which the tube is wound in the direction penetrating the tube, the edge of the cutting blade is almost eliminated,
Since a sharp state can be always maintained, the perforations formed are always constant, high quality can be maintained, and the cost can be reduced because the cutting blade has a long life.

Further, a pair of guide rollers are provided in parallel with the perforation roller at intervals in the circumferential direction of the outer peripheral surface of the perforation roller, and the guide rollers are combined between the respective guide rollers and the perforation roller. By winding the synthetic resin tube around the perimeter of the perforation roller with the resin tube interposed, perforation can be formed in a state where the perforation forming portion is fixed to the perimeter of the perforation roller by a pair of guide rollers, More accurate and consistent quality perforations can be formed.

As shown in FIG. 1, the heat sealing device 40 is provided adjacent to the perforation roller 21 and receives a roller 41 for winding the synthetic resin tube 1 formed with perforations in a folding direction. A sealing heater 43 supported on a rotating shaft 42 parallel to the roller 41, and a guide roller 4 for attaching the tube 2 to the receiving roller 41.
4, the receiving roller 41 and the heater 43 are rotated at the same peripheral speed, and the tube 1 is sandwiched between the receiving roller 41 and the heater 43 for each rotation, so that the tube 1 is adjacent to the perforation 3. The seal portion 2 is formed in parallel with.

As shown in FIGS. 1 and 5, the take-up device 50 includes a take-up receiving roller 51 which is driven to rotate at the same peripheral speed as the perforated roller 21, and a take-up auxiliary roller 52 positioned above the take-up roller 51. And both rollers 51, 5
A cylindrical core 53 is sandwiched between the two cores, and a perforation and a seal portion are formed on the outer periphery of the core 53 in the previous step, and the perforated bag processing tube 1 a wound around the winding roller 51 is wound. Like that.

The winding core 53 is detachably fitted on the outer periphery of the winding shaft 54. As shown in FIG. 6, the winding shaft 54 has a plurality of annular grooves 54a, 54a,... Formed in a circumferential direction, and rubber O-rings 55, 55,. It is fitted. The outer peripheral surface of each O-ring 55 is a winding shaft 54.
The O-ring 55 is shrunk by the inner peripheral surface of the winding core 53 when the core 53 is fitted to the outer surface of the core 53, and the inner surface of the winding core 53 is elastically moved by the reaction force at that time. It is designed to prevent the pressure from coming off.

At both ends of the take-up shaft 54, bearings 56, 56 having a diameter smaller than the largest diameter portion thereof are always non-removably attached. This is a pair of guides 57, 57 provided on both sides of the take-up receiving roller 51. And is movably mounted up and down along the guide. The upper ends of the guides 57 and 57 are open, and the bearings 56 and 57
56 can be taken in and out from the upper end.

The take-up auxiliary roller 52 is rotatably supported at the tip of an arm 58 that can swing vertically. The arm 58 has a shaft 59 having a fixed central portion.
(Shown in FIG. 1), and a winding assist motor 60 is supported at the other end of the arm 58.
The motor 60 rotates the winding auxiliary roller 52 via the belt 61 at a weekly speed equal to or slightly higher than the peripheral speed of the winding receiving roller 51.

The arm 58 is provided with the winding assist roller 5.
The two sides are balanced so as to rotate downward, and the winding assist roller 52 is pressed against the outer periphery of the winding core 53 by the downward force.

In the winding device 50 constructed as described above, the tip of the perforated bag processing tube 1a with the perforation 3 and the seal portion 2 wound around the take-up receiving roller 51 is connected to the bearings 56, 56 at both ends. It is set so that it is wound around the outer periphery of the winding core 53 mounted on the winding shaft 54 inserted in the guides 57, 57. At this time, the winding core 53 is placed on the winding receiving roller 51 with its upper side pressed by the winding auxiliary roller 52.

In this state, the tube 1a is fed in, and by rotating the take-up receiving roller 51 and the take-up auxiliary roller 52, the tube 1a is sequentially wound around the outer periphery of the winding core 53 at the same speed as the tube 1a.

In the figure, 62 and 63 are tubes 1a.
This is a guide roller that is driven to rotate at the same week speed as the feed speed.

Each of the rollers described above is connected to the heat sealing device 40.
Except that the seal receiving roller 41 is made of metal, the other uses a material whose outer peripheral surface is coated with, for example, a rubber material or the like which has a large frictional force on the tube 1.

[0029]

As described above, in the winding device in the apparatus for manufacturing a perforated roll-wound synthetic resin bag according to the present invention, the perforated bag-forming tube formed with perforations and a seal portion is wound around the synthetic resin bag. A take-up receiving roller that rotates at the same speed as the conveying speed of the resin tube, and is disposed above the take-up receiving roller in parallel with the roller, and is installed so as to be vertically movable in parallel, and a detachable core is provided on the outer periphery. A take-up shaft, and a take-up auxiliary roller which is disposed above and parallel to the take-up shaft, is parallelly movable up and down, is urged downward, and is rotated at the same peripheral speed as the take-up receiving roller. The perforated bag processing tube is wound around an outer periphery of a winding core attached to the winding shaft, and is placed on the take-up receiving roller. By performing the winding operation by contacting the winding assist roller, the peripheral speed of the wound roll is always the same as the winding receiving roller, and the winding force of the torque converter or the like is not adjusted. Thus, the perforated bag processing tube fed at a constant speed can be sequentially wound up at the same speed as the transport speed and with almost no tension.

Further, the winding shaft has both ends fitted to a vertically oriented guide so as to be movable in the vertical direction, and the both ends can be inserted and withdrawn from the upper part of the guide. It is easy to remove the roll and the operability is good.

Further, the winding shaft has a large-diameter portion having an outer diameter substantially equal to the inner diameter of the winding core and a small-diameter portion smaller than the large-diameter portion. Since a plurality of core inner surface pressing springs protruding outward from the diameter are provided at regular intervals in the circumferential direction, the attachment and detachment of the core with respect to the take-up shaft is facilitated, resulting in effects such as good operability.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an entire apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of the perforation roller according to the first embodiment;

FIG. 3 is a partially enlarged front view of the perforation cutter according to the first embodiment;

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a partial longitudinal sectional front view showing a winding device of the above.

FIG. 6 is a cross-sectional view showing a winding shaft according to the first embodiment.

FIG. 7 is a perspective view of an example of a perforated processing tube wound by the conventional apparatus and the apparatus of the present invention.

FIG. 8 is a side view schematically showing a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synthetic resin tube 1a Perforated bag processing tube 2 Seal part 3 Perforation 20 Perforation forming device 21 Perforation roller 22 Splicing roller 23 Fixed shaft 24 Perforation cutter 25 Cutting blade 26 Cutter support base 27 Slide guide 30 Cutter Outgoing / in operation means 31 Cam 32 Cam follower 33 Return spring 40 Heat sealing device 41 Receiving roller 42 Rotating shaft 43 Heater 50 Winding device 51 Winding roller 52 Winding auxiliary roller 53 Winding core 54 Winding shaft 54a Depression 55 O-ring 56 Bearing 57 Guide 58 Arm 59 Shaft 60 Motor 61 Belt 62, 63 Guide roller

Claims (2)

[Claims] 1. A synthetic resin tube is sequentially conveyed by a plurality of feed rollers, and a perforation for forming a perforation for cutting is formed in the tube during the conveyance, and a seal portion is formed in parallel with the perforation. In a roll winding device in a device for manufacturing a roll-wound synthetic resin bag, the bag processing tube is configured to be sequentially wound up in a roll shape around the outer periphery of a winding core, wherein the perforation and the seal portion are formed. A bag receiving tube is wound around, and a take-up receiving roller that rotates at the same week speed as the transport speed of the synthetic resin tube, and is installed on the upper side of the take-up receiving roller so as to be movable parallel to the roller and up and down, A take-up shaft having a detachable winding core on the outer periphery thereof, and an upper side of the take-up shaft, which is disposed in parallel with the take-up shaft, and which can be vertically moved in parallel and downward. A winding auxiliary roller that is urged and rotated at a peripheral speed equal to or slightly higher than the peripheral speed of the take-up receiving roller. A perforated roll-wound synthetic resin characterized in that a bag processing tube is wound and placed on the take-up receiving roller, and the upper side surface is brought into contact with the take-up auxiliary roller to perform a winding operation. Roll winding device in bag manufacturing equipment. 2. A take-up shaft, which has both ends fitted to a vertically oriented guide so as to be vertically movable,
The roll winding device according to claim 1, wherein the both ends can be freely inserted and removed from an upper portion of the guide.