JPH0610944A - Method installing/removing method of roll film on/from roll holder - Google Patents

Abstract

PURPOSE:To extremely easily install and remove a roll, and set the setting center of a roll film in a fixed position. CONSTITUTION:In the state where three locking claws 32 arranged on one moving member 28 of a roll holder 22 are recessed to the outer circumferential surface of a hollow support pipe 24, a roll film 14 is inserted onto the hollow support pipe 24. The end part of the roll film 14 makes contact with three locking pieces 34 arranged on the other moving member 30 to arrest the movement. A screw shaft 26 arranged on the hollow support pipe 24 is rotated in a determined direction to mutually approach and separate the pair of moving members 28, 30. In accordance with the movement of the moving member 28, the locking claws 32 are protruded from the outer circumferential surface of the hollow support pipe 28. The locking claws 32 and the locking pieces 34 are finally pressed onto the core opened end part of the roll film, and the roll film is installed and fixed to the hollow support pipe 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the mounting of a roll film on a roll holder, which makes it extremely easy to load and unload the roll film, and at the same time allows the roll film to be set at a constant position when the roll film is loaded. The present invention relates to a method and a detaching method.

[0002]

2. Description of the Related Art A roll body obtained by winding a long web or a single web such as a metal foil or a composite sheet such as a laminated film around a hollow core is widely used in various industrial fields according to various applications. Has been done. For example, in a bag-making filling and packaging machine, a roll body obtained by winding a synthetic resin film as a packaging material roll (hereinafter referred to as "roll film") is loaded at a predetermined position in the machine frame, and the film is continuously fed out. By forming into a bag and filling the bag with items,
It is designed to manufacture various pillow packaging bags. In this type of packaging machine, when the roll film is used up, the operator needs to replace it with a new roll.

The conventional roll replacement has been performed by using a roll holder having a form as shown in FIG. That is, a spindle 1 whose one end is rotatably held by a machine frame (not shown)
The abutting block 12 having a conical taper is fixed to the shaft 0, and the winding core 16 of the roll film 14 is inserted through the spindle 10. Then, after one opening of the winding core 16 is fitted into the conical surface of the block 12, the conical block 18 is inserted into the spindle 10. Then, the conical surface of the block 18 is inserted into and fitted into the other opening of the winding core 16, and the roll film 1 is formed by the blocks 12 and 18.
A handle 20 that holds 4 and is attached to the block 18.
The roll film 14 is mounted on the support shaft 10 by rotating the and fixing the block 18 to the support shaft 10.

[0004]

However, according to the roll holder having the above-described structure, the conical block 18 is removed every time the roll is replaced, and the roll film 14 is fitted into the block 12 and abutted against each other. 14 and spindle 10
It was necessary to raise and adjust the roll film 14 having a considerable weight so that the centers of and would coincide with each other, and then to attach the block 18, which required a very complicated operation.

Further, when the width of the roll film 14 is changed due to the order change of the film, the center of the film feeding direction of the roll film 14 is determined so that the film is not biased to the left and right. Therefore, skill and time were required for this adjustment.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in attaching / detaching a roll film to / from the roll holder described above, and has been proposed to suitably solve this drawback. It is an object of the present invention to provide a mounting method and a mounting / demounting method of a roll film that can be performed extremely easily and in a short time, and that the setting position of the roll film can always be set constant.

[0007]

In order to achieve the above object, a method for mounting a roll film on a roll holder according to the present invention is a method for mounting a roll wound with a film on a supporting means of the roll holder. Then, after the roll film is loaded on the supporting means, a pair of holding means facing both sides of the roll film are moved close to each other in a positional relationship in which the set center of the roll film is always constant,
At least one of the sandwiching means is moved from a retracted position that allows the roll film to be inserted onto the supporting means to a contact position at which the roll film can be brought into contact with the opening end of the roll film. It is characterized in that it is sandwiched and fixed from both sides in the axial direction.

In order to achieve the above object, a method of attaching / detaching a roll film to / from a roll holder according to the present invention is a method of attaching / detaching a roll wound with a film to / from a supporting means of the roll holder. After loading the roll film on the supporting means, the pair of nipping means facing the both sides of the roll film are moved closer to each other in a positional relationship such that the set center of the roll film is always constant, so that the nipping means forms the roll film. By sandwiching and fixing from both sides in the axial direction, while moving the pair of sandwiching means away from each other, at least one of the sandwiching means is moved to a retracted position that allows the roll film to be detached from the supporting means. The roll film can be detached from the supporting means.

[0009]

After loading the roll film on the support means of the roll holder, the pair of sandwiching means facing both sides of the roll film are moved close to each other. The at least one holding means moves from a retracted position that allows the roll film to be inserted onto the support means to a contact position at which the roll film can come into contact with the opening end of the roll film. The roll film is abutted on both sides of the roll film in the axial direction and sandwiched therebetween, and the roll film is fixed to the supporting means. When removing the roll film from the supporting means, the pair of holding means are moved away from each other. At this time, at least one holding means moves to a retracted position that allows the roll film to be separated from the supporting means. This allows the roll film to be removed from the support means.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method for mounting a roll film on a roll holder and a method for mounting and demounting the roll film according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. FIG. 1 is an exploded perspective view of a roll holder in which the present invention is embodied. The roll holder 22 includes a hollow support tube 24 and a screw shaft 26 which is inserted through and supported by the hollow support tube 24 with their axes aligned. And a pair of moving members 28 and 30 that are attached to the screw shaft 26 in a relative manner. That is, as shown in FIG. 2, the hollow support tube 24 is horizontally rotatably supported, for example, at an appropriate location (roll film loading location) of a bag-making filling and packaging machine, and the free end portion of the support tube 24 is used. By externally inserting the winding core 16 of the roll film 14, the roll film 14 can be detachably supported. On the peripheral surface of the hollow support tube 24, there are provided longitudinally extending through grooves 36 and 38 for guiding a locking claw 32 and a locking piece 34, which will be described later, as shown in FIG. A total of 3 with a central angle of 120 ° in the circumferential direction
This is drilled.

Inside the hollow support tube 24, a screw shaft 26 is rotatably inserted and supported with its central axis aligned with this tube. That is, the screw shaft 26 is provided with male screws 40 and 42, which are threaded as left and right screws, on both sides of the shaft, and is rotatably supported by bearings 44 and 44 arranged at both ends in the longitudinal direction inside the hollow support tube 24. Has been done. Further, on the left end portion of the screw shaft 26 (on the free end portion side of the hollow support tube 24),
A handle 46 as a rotating means is attached, and the screw shaft 26 can be rotated by manually rotating the handle 46.
Is rotated in the forward and reverse directions.

The male screws 40 and 42 of the screw shaft 26 are
As shown in FIG. 2, a pair of moving members 28 and 30 formed by internally threading female threads are correspondingly screwed. As shown in FIG. 1, the one moving member 28 includes a cylindrical portion 28a and a tapered portion 2 including a cone having a larger diameter than the cylindrical portion 28a.
8b and a flange portion 28c, and a sleeve 48 slidably fitted into the cylindrical portion 28a and having a locking claw 32 to be described later pivotally supported therein. A U ring 50 is attached to the free end side of the cylindrical portion 28a to prevent the sleeve 48 fitted therein from falling off. The flange portion 2
Bolts 52 can be respectively screwed onto the outer peripheral surface of 8c at positions corresponding to the three through slots 36.
The rotation of the moving member 28 is regulated by exposing 2 to the through long groove 36 in the hollow support tube 24.

The moving member 30 which is screwed into the right side of the screw shaft 26 is formed of a cylindrical body, and a locking piece 34 which functions as a holding means projecting in the radial direction is formed on the peripheral surface of the moving member 30 with a central angle of 1.
A total of 3 are fixed at 20 °. This locking piece 34
The roll film 1 faces the hollow supporting tube 24 in three penetrating long grooves 38 formed at a central angle of 120 ° and constantly protrudes from the outer peripheral surface of the supporting tube 24 through the long grooves 38.
The size is set so as to face the contact position where the opening end of the winding core 16 of No. 4 can contact, and the movable member 30 can travel in the longitudinal direction and the rotation in the circumferential direction is restricted. Therefore, it will be appreciated that when the screw shaft 26 is rotated, the moving members 28 and 30 relatively move toward and away from each other in the hollow support pipe 24 under the action of the left and right screws.

Next, a mechanism for expanding the locking claw 32 that functions as a holding means attached in relation to the moving member 28 will be described. As can be seen from FIGS. 1 and 2, the locking claw 32 includes the inclined portion 32a, the contact portion 32b, and the sliding contact portion 32.
It is composed of a plate material forming c, and is rotatably supported by the sleeve 48 at the base thereof. That is, as shown in FIG. 1, the base of the locking claw 32 is inserted into each of the three slits 54 formed in the outer circumferential surface of the sleeve 48 at intervals of 120 ° in the circumferential direction, and the slit 54 and By inserting the pin 56 into the base portion, each locking claw 32 is pivotally attached to the sleeve 48 in a rotatable manner. Further, the three locking claws 32 are provided with the locking claws 32 which are hollow support tubes 24.
Retreat position that does not always project from the through long groove 36 of
An O-ring 60 made of an elastic material is wound so as to reach the (position allowing the roll film 14 to be inserted into and removed from the hollow support tube 24), and the locking claw 32 is always attached in the central direction of the hollow support tube 24. It has become a force. In the closed state of the locking claw 32, the contact portion 32 of the locking claw 32 is
b is dimensioned so as to slightly face the through long groove 36, and restricts the rotation of the sleeve 48.

The sleeve 48 is slidably inserted into the moving member 28 and is inserted into the hollow support tube 24. At this time, the two annular grooves formed in the outer periphery of the sleeve 48 are recessed. , O capable of contacting the inner wall of the hollow support tube 24
The rings 58, 58 are fitted respectively, and at the initial stage of the movement of the moving member 28, the sleeve 48 itself receives resistance due to the friction between the O-ring 58 and the inner wall of the pipe so that the axial movement is restricted. There is. Then, with respect to the sleeve 48 whose movement is restricted, the moving member 2 is moved in a direction approaching the sleeve 48.
When 8 moves, the sliding contact portion 32c of the locking claw 32 is settled on the taper portion 28b of the moving member 28, the locking claw 32 spreads outward in the radial direction due to the wedge effect, and finally, It projects from the outer peripheral surface of the hollow support tube 34 through the through long groove 36 to reach the contact position. In the state where the sliding contact portion 32c is in contact with the flange portion 28c of the moving member 28, as shown in FIG. 4, the contact portion 32b of the locking claw 32 is shown.
Is to project at a right angle from the outer peripheral surface of the hollow support tube 24.

Further, as described above, the three locking pieces 34 are fixed to the other moving member 30. This locking piece 34
An inclined surface 34a and a vertical surface 34b are formed on the end surface of the roll film 14. The vertical surface 34b presses the end of the winding core 16 of the roll film 14. Further, since the locking piece 34 faces the abutting position where it always protrudes from the outer peripheral surface of the hollow support tube 24, when the roll film 14 is externally inserted into the hollow support tube 24, the vertical surface 34b becomes the roll film 14.
On the other hand, it serves as a stopper.

The male screws 40, 42 of the screw shaft 26 are
And the corresponding internal threads of the moving members 28 and 30 are threaded at the same pitch. Therefore, the moving amounts of the moving member 28 and the moving member 30 during the rotation of the screw shaft 26 are the same, and as a result, the center of the roll film 14 sandwiched between the locking claw 32 and the locking piece 34 (the roll film The center of the set) will always be set at a fixed position.

[0018]

Next, the operation of the roll holder according to the embodiment will be described. In the roll holder 22, with the roll film 14 removed, as shown in FIG. 2, the three locking claws 32 face the retracted position where the roll film 14 is retracted from the outer peripheral surface of the hollow support tube 24. It can be easily inserted into the hollow support tube 24. In this case, since the locking piece 34 arranged in the outer insertion direction of the roll film 14 always faces the contact position protruding from the outer peripheral surface of the hollow support tube 24, the roll film 1
Finally, the end of 4 comes into contact with the locking piece 34 and is prevented from moving, so that it is prevented from being located outside the moving range of the moving members 28 and 30.

The roll film 14 is attached to the hollow support tube 24.
The handle 4 attached to the end of the screw shaft 26
6 is manually operated to rotate the screw shaft 26 in a predetermined direction to move the pair of moving members 28, 30 in a direction in which they approach each other. At the initial stage of the movement of the moving member 28, the sleeve 48 fitted into the moving member 28 has the O-ring 5
It does not move due to the frictional resistance between 8, 58 and the inner wall of the hollow support tube 24, and only the moving member 28 moves axially in the through hole of the sleeve 48. That is, due to the wedge effect of the tapered portion 28b formed on the moving member 28, the locking claw 32 is expanded outward in the radial direction and reaches the contact position protruding from the outer peripheral surface of the hollow support tube 28 from the retracted position. . Then, the sliding contact portion 32c of the locking claw 32 comes into contact with the flange portion 28c of the moving member 28 to stop the expansion.

When the screw shaft 26 is further rotated, the sleeve 48 is moved by the axial pressing force of the moving member 28 against the friction resistance between the O-rings 58, 58 and the inner wall of the hollow support tube 24. It moves axially with the member 28. Then, the inclined portions 32a and 34a formed on the locking claw 32 and the locking piece 34 are inserted and fitted into the opening of the winding core 16 of the roll film 14 as the moving members 28 and 30 move. Further, a pressing force in the axial direction is applied, and as shown in FIG. 4, the abutment portion 32b of the locking claw 32 and the locking piece 34 and the vertical portion 3 thereof.
4b is pressed against the open end of the winding core 16, the center in the film feeding direction is set at a fixed position, and the roll film 14 is reliably loaded and fixed to the hollow support tube 24.

Next, when the roll film 14 is to be removed, by rotating the handle 46 in the opposite direction, both moving members 28, 30 are moved in the directions away from each other. At this time, since the locking claw 32 is always biased in the closing direction by the O-ring 60, the outer periphery of the hollow support tube 24 is in sliding contact with the tapered portion 28b of the moving member 28 as the moving member 28 moves. It will sink from the surface and reach the evacuation position. Therefore, the force for pressing the roll film 14 in the axial direction is released, and the roll film 14 can be easily removed.

The sleeve 48 fitted into the moving member 28 does not move in the hollow support tube 24 due to the frictional resistance of the O-rings 58, 58 in the initial stage of the movement of the moving member 28. However, when the moving member 28 further moves, the U-ring 50 attached to the moving member 28 comes into contact with the end portion of the sleeve 48 and moves in the hollow support tube 24 like the moving member 28.

In the embodiment, the case where the hollow supporting tube is used as the supporting means has been described, but the present invention is not limited to this. For example, the supporting means is composed of a plurality of rods and is moved to the rods. The members may be slidably arranged. Further, instead of the plurality of locking pieces disposed on one of the moving members and functioning as a holding means, a cylindrical or square tube-shaped member having a tapered end portion is externally fitted to the hollow support tube, and the member is It is also possible to move it integrally with the moving member and bring it into contact with one opening end of the roll film. Furthermore, the left and right male threads of the screw shaft and the corresponding female threads of both moving members are threaded at different pitches, thereby varying the moving amount of both moving members when the screw shaft rotates, and by engaging the locking claws. It is also possible to set the set position of the roll film sandwiched between the locking piece and the desired position in the film feeding direction.

[0024]

As described above, according to the method for attaching / detaching the roll film to / from the roll holder according to the present invention, the complicated work of removing and attaching the holding means each time the roll is exchanged is not required, and the experience is particularly high. Even a person who does not have a roll can easily perform the roll replacement work. Further, even when the width of the roll film is changed by order change, the set position of the film can always be kept constant, and the roll replacement time can be shortened. Therefore, there is an advantage that the time for stopping the operation of the production line can be minimized and the production efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a roll holder according to an embodiment capable of implementing a method of mounting a roll film on a roll holder and a method of mounting and demounting the roll film according to the present invention.

FIG. 2 is a vertical cross-sectional view of the roll holder cut at a central angle of 120 ° in a state where the roll film is waiting to be loaded.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a vertical cross-sectional view of the roll holder with the roll film loaded and held, cut at a central angle of 120 °.

FIG. 5 is an explanatory diagram of a roll holder according to a conventional technique.

[Explanation of symbols]

 14 Roll Film 24 Hollow Support Tube (Supporting Means) 32 Locking Claw (Clamping Means) 34 Locking Piece (Clamping Means)

Claims (2)

[Claims] 1. A method of mounting a roll around which a film is wound on a support means of a roll holder, wherein a pair of holding means facing both sides of the roll film after the roll film is loaded on the support means is provided. While moving the roll films closer to each other in a positional relationship where the set center of the roll film is always constant, at least one holding means is moved from the retracted position to allow the roll film to be extrapolated to the supporting means, and the opening end of the roll film. A method for mounting a roll film on a roll holder, characterized in that the roll film is moved to a contact position where it can be contacted with, and the roll film is clamped and fixed from both axial sides by both clamping means. 2. A method for attaching and detaching a roll wound with a film to and from a support means of a roll holder, wherein a pair of holding means facing both sides of the roll film after the roll film is loaded into the support means is provided. By moving the roll films close to each other in a positional relationship where the set centers of the roll films are always constant, the roll films are clamped and fixed from both sides in the axial direction by both clamping means, and the pair of clamping means are moved away from each other. While moving at least one of the sandwiching means to a retracted position that allows the roll film to be separated from the supporting means,
A method of attaching / detaching a roll film to / from a roll holder, wherein the roll film can be detached from a supporting means.