JPH0649540B2 - Roll holder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll holder, and more particularly, it is extremely easy to load and unload a web winding roll,
Moreover, the present invention relates to a roll holder that can always set the set position of the roll to be constant when the roll is loaded.

BACKGROUND ART Rolls obtained by winding a single web such as a long paper, a film, or a metal foil, or a composite sheet such as a laminated film (hereinafter simply referred to as “web”) around a hollow core are used in various industrial fields. Widely used depending on the application. For example, in a bag-making filling and packaging machine, a roll wound with a synthetic resin web as a packaging material roll is loaded at a predetermined position in the machine frame, and the web is continuously fed out to form a bag body, Various pillow packaging bags are manufactured by filling the bag with products. In this type of packaging machine, when the original roll 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, an abutment block 12 having a conical taper is fixed to a spindle 10 whose one end is rotatably held in a machine frame (not shown), and a winding core 16 of a roll body 14 is inserted into the spindle 10. Then, after one opening of the winding core 16 is fitted into the conical surface of the block 12 and abutted against the conical surface of the block 12, another conical block 18 is attached to the support shaft 10.
Insert. Then, the conical surface of the block 18 is inserted into and fitted into the other opening of the winding core 16, so that both blocks 1
The roll body 14 is mounted on the support shaft 10 by sandwiching the roll body 14 with 2, 18 and rotating the handle 20 attached to the block 18 to fix the block 18 to the support shaft 10. Has become.

However, according to the roll holder having the above-described structure, the conical block 18 is removed every time the roll is replaced, the roll body 14 is fitted into the block 12 and abutted against each other, and then the roll body 14 and It is necessary to raise and adjust the roll body having a considerable weight so that the center of the support shaft 10 is aligned with the center of the support shaft 10, and then to attach the block 18, which requires an extremely complicated operation.

Also, due to the order change of the web, the roll body 14
If the width of the roll body is changed, it is necessary to determine the center of the roll body 14 in the web feeding direction and adjust so that the web is not biased to the left and right, and skill and time are required for this adjustment. Was needed.

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in the roll holder according to the prior art, and it is an object of the present invention to provide a suitable solution to this problem, and it is extremely easy to load and unload the supporting means. It is an object of the present invention to provide a roll holder that has a novel configuration that can be performed and that can always set the set position of the roll body.

Means for Solving the Problems In order to achieve the above-mentioned object, a roll holder according to the present invention includes a hollow support tube that detachably supports a web winding roll, and a peripheral surface of the hollow support tube at a required central angle. A plurality of penetrating long grooves that are bored and extend in the longitudinal direction thereof are rotatably inserted and supported inside the hollow support tube with their axes aligned.
A screw shaft that is rotated in the forward and reverse directions by a rotating means, and a pair of moving members that are screwed into the screw shaft and that can move close to and away from each other along the hollow support tube under the rotating action of the screw shaft. In the roll holder provided, the one moving member is arranged in the hollow support tube in a state in which the rotation is restricted, and is a plurality of members which are spaced apart from each other by a predetermined distance in the circumferential direction and correspond to the respective through long grooves. The locking claw is provided in a retracted position that allows the web winding roll to be inserted into the support tube without protruding outward from the peripheral surface of the hollow support tube as the moving member moves. To a contact position capable of contacting the opening end of the web winding roll protruding outward from the peripheral surface of the support tube, the movable member is configured to move via the through long groove, and the other moving member is It is installed in the hollow support tube with its rotation restricted. At a position spaced apart by a predetermined distance in the circumferential direction and corresponding to each of the penetrating long grooves, it projects outward from the circumferential surface of the support tube and always faces an abutting position capable of abutting the open end of the web winding roll. A plurality of locking pieces are provided, and by moving a pair of moving members close to each other under the rotating action of the screw shaft, the opening ends of the web winding roll externally inserted in the hollow support tube are It is characterized in that the locking claw and the locking piece are brought into contact with each other.

Embodiments Next, a roll holder 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 according to an embodiment of the present invention. The roll holder 22 includes a hollow support tube 24 and a screw inserted and supported by the hollow support tube 24 with their axes aligned. Basically, it is composed of a shaft 26 and a pair of moving members 28 and 30 which are attached to the screw shaft 26 in relation to each other. In the present specification, the screw shaft refers to one shaft formed with right-hand threads and left-hand threads on both sides.

That is, as shown in FIG. 2, the hollow support tube 24 is horizontally rotatably supported, for example, at an appropriate location (a loading location of a web winding roll) of a bag-making filling and packaging machine.
By externally inserting the winding core 16 of the roll body 14 through the free end of the roll body 14, the roll body 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 three holes are drilled in the circumferential direction of 24 at a central angle of 120 °.

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 includes male screws 40 and 42, which are threaded as left and right screws, on both sides of the shaft, and bearings 44 and 44 arranged at both ends in the longitudinal direction inside the hollow support tube 24.
It is rotatably supported. Further, a handle 46 as a rotating means is attached to the left end portion (the free end portion side of the hollow support tube 24) of the screw shaft 26, and by manually rotating the handle 46, the screw shaft 26 can be rotated normally and reversely. It is designed to rotate in the direction.

As shown in FIG. 2, a pair of moving members 28 and 30 formed by internally threading a female screw are correspondingly inserted into the male screws 40 and 42 of the screw shaft 26. As shown in FIG. 1, the one moving member 28 has a cylindrical portion 28a.
And a tapered portion 28b formed of a cone having a larger diameter than this and a flange portion 28c, and a sleeve 48 pivotally supporting a locking claw 32 to be described later is slidably fitted into the cylindrical portion 28a. . 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. Bolts 52 can be respectively screwed onto the outer peripheral surface of the flange portion 28c at positions corresponding to the three penetrating long grooves 36, and the bolts 52 face the penetrating long grooves 36 in the hollow support tube 24. By
The rotation of the moving member 28 is restricted.

The moving member 30 screwed into the right side of the screw shaft 26 is composed of a cylindrical portion, and three locking pieces 34 protruding in the radial direction are fixed to the peripheral surface thereof at a central angle of 120 °. The locking piece 34 faces the three penetrating long grooves 38 formed in the hollow support tube 24 at a central angle of 120 °, and the long groove 3 is formed.
The moving member is dimensioned so as to constantly project in the radial direction from the outer peripheral surface of the hollow support tube 24 via 8 and to come into contact with the opening end of the winding core 16 of the roll body 14 so as to come into contact therewith. 30 is capable of traveling in the longitudinal direction and is restricted from rotating in the circumferential direction. Therefore, the screw shaft 26
If you rotate, the moving member 2
It will be appreciated that 8, 30 move relatively closer and further apart within the hollow support tube 24.

Next, the expansion mechanism of the locking claw 32 attached in relation to the moving member 28 will be described. As can be seen from FIGS. 1 and 2, the locking claw 32 is composed of a plate material having an inclined portion 32a, an abutting portion 32b and a sliding contact portion 32c, and is pivotally supported at its base by a sleeve 48 so as to be rotatable. Has been done. That is, as shown in FIG. 1, a total of three slits 5 are formed on the outer peripheral surface of the sleeve 48 at 120 ° intervals in the circumferential direction.
Each of the locking claws 32 is pivotally attached to the sleeve 48 by inserting the base of the locking claw 32 into each of the four and inserting a pin 56 into the slit 54 and the base. It Further, the three locking claws 32 have the locking claws 3
An O-ring 60 made of an elastic material is wound so that 2 does not always come out from the through long groove 36 of the hollow support tube 24, and the locking claw 32 is moved toward the center of the hollow support tube 24 (at the retracted position). (Towards) always energized. In addition,
In a state where the locking claw 32 faces the retracted position where it does not project from the through long groove 36, the roll body 1 to the hollow support tube 24 is
Extrapolation of 4 is allowed. Further, in the closed state of the locking claw 32, the contact portion 32b of the locking claw 32 is dimensioned so as to slightly face the penetrating long groove 36, and regulates the rotation of the sleeve 48.

The sleeve 48 is inserted into the hollow support tube 24 while being slidably inserted into the moving member 28. At this time, two annular grooves recessed in the outer periphery of the sleeve 48 are
An O-ring 58 capable of contacting the inner wall of the hollow support tube 24,
58 are respectively fitted, and at the beginning 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, and the movement in the axial direction is restricted. When the moving member 28 moves in a direction approaching the sleeve 48 whose movement is restricted, the locking claw 32 is attached to the tapered portion 28b of the moving member 28.
The sliding contact portion 32c of the lock settles down, and the locking claw 3 is formed due to the wedge effect.
2 spreads outward in the radial direction, and finally projects from the penetrating long groove 36 so as to come into contact with the opening end portion of the winding core 16 of the roll body 14 inserted into the hollow support tube 24. It reaches the contact position. The sliding contact portion 32c is the moving member 28.
In the state of being in contact with the flange portion 28c, the contact portion 32b of the locking claw 32 protrudes at a right angle from the peripheral surface of the hollow support tube 24 as shown in FIG.

Further, three locking claws 34 are fixed to the other moving member 30 as described above. An inclined surface 34a and a vertical surface 34b are formed on the locking claw 34, and the end surface of the winding core 16 of the roll body 14 is pressed by the vertical surface 34b. Further, since the locking piece 34 always projects from the outer peripheral surface of the hollow support tube 24, when the roll body 14 is externally inserted into the hollow support tube 24, the vertical surface 34b serves as a stopper for the roll body 14. To fulfill.

The male screws 40, 42 of the screw shaft 26 and the moving member 2
The corresponding female threads of 8 and 30 are threaded at the same pitch. Therefore, the moving member 2 when the screw shaft 26 rotates
8 and the moving member 30 have the same movement amount, whereby the roll body 1 clamped by the locking claw 32 and the locking piece 34.
The center in the web feeding direction of 4 (the center of the roll body set) is always set at a fixed position.

Operation of Embodiment Next, the operation of the roll holder according to this embodiment will be described. In the roll holder 22 according to this embodiment, when the roll body 14 is removed, as shown in FIG. 2, the three locking claws 32 face the retracted position where they do not project from the outer peripheral surface of the hollow support tube 24. Therefore, the roll body 14 can be easily attached to the hollow support tube 24. In this case, the locking piece 34 arranged in the direction of extrapolation of the roll body 14
Always faces the abutting position projecting from the outer peripheral surface of the hollow support tube 24, so that the end of the roll body 14 finally abuts on the locking piece 34 and is prevented from moving.
It is designed to be prevented from being located outside the moving range of 8 and 30.

After the roll body 14 is externally inserted into the hollow support tube 24, the handle 46 attached to the end of the screw shaft 26 is manually operated,
By rotating the screw shaft 26 in a predetermined direction, the pair of moving members 2
8 and 30 are moved toward each other. In the initial stage of the movement of the moving member 28, the sleeve 48 fitted into the moving member 28 does not move due to the frictional resistance between the O-rings 58, 58 and the inner wall of the hollow support tube 24, and the sleeve 48 does not move.
Only the moving member 28 moves axially in the through hole. 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 protrudes from the outer peripheral surface of the hollow support tube 28 to reach the contact position. And the sliding contact portion 32c of the locking claw 32
However, it abuts 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 pressed by the moving member 28 in the axial direction, so that the O-rings 58, 5
8 is moved in the axial direction together with the moving member 28 against the friction resistance between the inner wall of the hollow support tube 24 and the inner wall 8. The inclined portions 32a and 34a formed on the locking claw 32 and the locking piece 34
Is inserted and fitted into the opening of the winding core 16 of the roll body 14 as the moving members 28 and 30 move. Further, a pressing force in the axial direction acts, and as shown in FIG. 4, the abutment portion 32b and the vertical portion 34b of the locking claw 32 and the locking piece 34 move the core 16
The open end of the roll body 14 is pressed, and the roll body 14 is reliably loaded and fixed to the hollow support tube 24.

Next, when the roll body 14 is removed, the handle 46
By rotating the two in the opposite direction, both moving members 28, 3
0s are moved in the directions away from each other. At this time, since the locking claw 32 is always urged in the closing direction by the O-ring 60, the locking claw 32 is slidably contacted with the tapered portion 28b of the moving member 28 in the hollow support tube 24 as the moving member 28 moves. It will be destroyed. Therefore, the force for pressing the roll body 14 in the axial direction is released, and the roll body 14 can be easily removed.

The sleeve 48 fitted into the moving member 28 has O-rings 58, 58 at the beginning of the movement of the moving member 28.
Because of the frictional resistance, the hollow support tube 24 does not move. 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.

EFFECTS OF THE INVENTION As described above, according to the roll holder of the present invention, like the conventional holder, the conical block is removed every time the roll is replaced, and the central axis of the inserted roll body is aligned and adjusted. This does not require complicated work, and even a person who has no particular experience can easily perform roll replacement work. Further, even when the width of the roll body is changed due to the order change, the set position of the roll body 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]

1 is an exploded perspective view of a roll holder according to the present invention, FIG.
FIG. 3 is a vertical cross-sectional view of the roll holder according to the present invention cut at a central angle of 120 ° in a state of waiting for loading of a web winding roll, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. FIG. 4 is a vertical sectional view of the roll holder according to the present invention cut at a central angle of 120 ° while the web winding roll is loaded and held, and FIG. 5 is an explanatory view of the roll holder according to the prior art. . 14 ... Roll body, 24 ... Hollow support tube 26 ... Screw shaft, 28, 30 ... Moving member 32 ... Locking claw, 34 ... Locking piece 36, 38 ... Penetrating long groove, 40, 42 ... … Male screw

Claims (3)

[Claims] 1. A hollow support tube for detachably supporting a web winding roll, and a plurality of through long grooves formed in a peripheral surface of the hollow support tube at a required central angle and extending in a longitudinal direction thereof. ,
A screw shaft that is rotatably inserted and supported in the hollow support tube with its axis aligned and is rotated in forward and reverse directions by a rotating means, and is screwed into the screw shaft, and the screw shaft is rotated under the action. In a roll holder provided with a pair of moving members that can be moved toward and away from each other along a hollow support tube, the one moving member is disposed in the hollow support tube in a state in which rotation is restricted, and A plurality of locking claws spaced apart by a predetermined distance in the circumferential direction and corresponding to the respective through long grooves are provided, and the locking claws move outward from the peripheral surface of the hollow support pipe as the moving member moves. From a retracted position that allows extrapolation of the web winding roll that does not project to the support tube, to a contact position that can contact the open end of the web winding roll that projects outward from the peripheral surface of the support tube, It is configured to move through the through long groove, and The member is disposed in the hollow support tube in a state in which the rotation is restricted, and is projected outward from the peripheral surface of the support tube at a position corresponding to each of the through long grooves with a predetermined gap in the circumferential direction. A plurality of locking pieces that always come into contact with the open end of the web winding roll are provided, and the pair of moving members are moved close to each other under the rotating action of the screw shaft, A roll holder characterized in that the locking claws and locking pieces are configured to abut against both open end portions of a web winding roll externally inserted into the hollow support tube. 2. The roll holder according to claim 1, wherein the screw shaft is formed with screw portions in left and right opposite directions, and the respective moving members are screwed into the respective screw portions. 3. The plurality of locking claws are pivotally supported at predetermined intervals in the circumferential direction by a sleeve provided slidably within a predetermined range along the screw shaft, and the contact position and the retracted position are provided. The roll holder according to claim 1 or 2, wherein the roll holder is configured to be movable between the roll holder and the roll holder.