JP2002012347A - Reel winding/unwinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow smooth and uniform winding/unwindiung during high-speed rotation by concentrically and precisely expanding/contracting a reel with respect to a supporting shaft. SOLUTION: A plurality of reel materials 5 arranged along the direction of a rotational center A radially from the rotational center A are mounted on a base plate 4 with the supporting shaft 3 as a center so that they can be moved perpendicularly to the rotational center A and in the state that they are energized to the rotational center A. Cam bodies 6 each having an inclined portion 13 inclined to the direction of the rotational center A are provided on the respective reel materials. A slide contact body connected to an operating shaft 8 movable along the direction of the rotational center A has slide contact with the cam body 6. Thus, the cam bodies 6 are guided perpendicularly to the direction of the rotational center A with the movement of the slide contact body 9 to cause the expansion/contraction of the reel 12 consisting of the plurality of reel materials 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for winding and unwinding a plastic film or the like without a core.

[0002]

2. Description of the Related Art A device for winding a plastic film or the like without a core is widely used in a film forming device or the like, and a skein frame winding device is often used for such winding.
Conventionally, various types of skein frame winding devices have been used. For example, as shown in FIG. A plurality of slender plate-shaped skein frame members b arranged in parallel, and two support rods c and d for supporting between the skein frame member b and the support shaft a per skein frame material, A skein frame e is formed by arranging a plurality of skein frame members b around the circumference of the support shaft a. In this skein frame winding device, one of the support rods c and d corresponding to one skein frame material has one end c.
1 is slidably connected to the skein frame member b, and the other end c2 is pin-connected to the support shaft a. The other support rod d has one end d1 connected to a pin on the skein frame b, and the other end d2 connected to an operating shaft f slidably fitted on a support shaft a. According to this method, when the operating shaft f advances and retreats in the axial direction of the support shaft a by a predetermined stroke, the two support rods c and d expand and contract in a so-called pantograph manner.
By raising and lowering d, the diameter of the skein frame e is increased and reduced.

Further, in a skein frame winding device in which the skein frame expands and contracts, as shown in FIG. 7, a plurality of skein frame members b are arranged around the circumference of the support shaft a in the same manner as described above. A support rod c for supporting the member b is fixed to the support shaft a. A pivot arm g is pin-connected to a tip end of the support rod c so as to be rotatable. The other end is also pin-connected to the skein frame member b, and the skein frame member b is thus connected to the support rod c via the rotating arm g. And
The pressing plate h that contacts one end of the skein frame member b is configured to be able to advance and retreat in the axial direction by the operating shaft f. According to this method, when the operating shaft f advances and retreats in the axial direction of the support shaft a by a predetermined stroke, the pressing plate h advances and retreats the skein frame member b, and the rotating arm g connected to the skein frame member b Are raised and lowered with the connecting portion on the supporting rod c side as a fulcrum, whereby the skein frame is expanded and reduced in diameter. In order to stroke the operating shaft in these skein frame winding devices, both a manual type and an automatic type such as a motor or an air cylinder can be used.

However, in the above-described skein frame winding device, when the operating shaft is operated to expand and contract the skein frame, the skein frame material moves in the axial direction. There is a problem that it is necessary. In addition, since the operating mechanism is composed of a number of links supporting the movable member with pins, the pin support portion of the movable member is likely to be loosened during long-time use,
There is also a problem that the radial distances of the plurality of skein frame members are not uniform, so that smooth winding becomes difficult particularly at high speed rotation. Furthermore, if the skein frame take-up device is operated with the position of the operating shaft adjusted and the skein frame material diameter determined at the start, the web roll becomes loose during operation and the skein frame needs to be expanded. It may be.

Further, when the web roll wound by the skein frame winding device having the above structure is once removed from the skein frame and attached to a similar skein frame, there is the following problem. For example, a coreless web roll that has been wound once on a skein frame and then removed is applied to an anti-inspection machine to perform inspection processing, or a web roll wound on a skein frame winding device is wound by a rewinding machine. In some cases, replacement is performed. In such a case, the removed coreless web roll must be mounted on the skein frame of the apparatus for unwinding again. At this time, when the wound coreless web roll is removed from the skein frame material, as shown in FIG. 8, even though the outer periphery of the web roll i is circular, the inner periphery is a part in contact with the skein frame material. Usually, it has irregularities with j as a concave portion and is loosely wound. Such a web roll is generated because the winding is performed with a strong tension as the diameter increases at the time of winding.When the web roll is once again mounted on the skein frame material and unwound, the diameter becomes large. Even if unwinding is started with a predetermined tension from outside, when the unwinding progresses and the diameter decreases, the unwinding of the unwinding web roll itself becomes loose. In such a state in which the winding is loose, a gap occurs between the web roll and the skein frame material, and the predetermined unwinding tension cannot be maintained. Therefore, it is necessary to increase the diameter of the skein frame and reset it to the same tension as at the start.
There has been a problem that the operation has to be stopped and the diameter of the frame material must be increased.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the skein frame member is perpendicular to the support shaft when the outer diameter of the skein frame is enlarged or reduced. To prevent the skein frame material from moving in the axial direction of the center of rotation to prevent winding deviation during winding and unwinding. It can be expanded and contracted, enabling smooth and uniform winding and unwinding at high speed rotation.
The tension in the radial direction of the winding diameter is constant even in the process where the web roll diameter fluctuates small during unwinding. An object is to provide an unwinding device.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and has a base plate which is disposed so as to penetrate a rotating support shaft and is attached to the support shaft, and a rotation of the support shaft. A plurality of skein frame members which are arranged around a center, each of which is radially arranged from the rotation center side with respect to the base plate, and each of which is mounted so as to be movable in a direction orthogonal to the rotation center, A cam body having an inclined portion projecting from each of the skein frame members toward the center of rotation and inclined with respect to the direction along the center of rotation, and provided movably in the direction along the center of rotation through the support shaft Operating shaft, a sliding contact member attached to the operating shaft and slidably in contact with the cam body, and biasing means for constantly biasing the skein frame member toward the center of rotation. Skeins with features Providing a winding unwinding device, it is to solve the above problems.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. In the figure, reference numeral 1 denotes a skein frame winding / unwinding device. The skein frame winding / unwinding device 1 is rotatably supported by a frame portion 2 serving as a framework of the device, and has a support shaft 3 projecting from the frame portion 2. A disk-shaped base plate 4 which is attached to the support shaft 3 so as to penetrate the support shaft 3 and rotates at a position near the frame portion 2.
A plurality of skein frame members 5 arranged around the support shaft 3 protruding from the base plate 4 and each extending along the direction of the rotation center A; An operation in which the cam member 6 is located, and is inserted into a hollow portion 7 extending from the frame portion 2 side of the support shaft 3 to a required position so as to be movable along the direction of the center of rotation and co-rotate with the support shaft 3. A shaft 8, a sliding contact body 9 located around the support shaft and surrounded by the plurality of skein frame members 5,
An urging means 10 for urging each of the skein frame members 5 toward the support shaft is provided.

A gear (not shown) is attached to the support shaft 3 at a portion located in the frame portion 2, and the support shaft 3 is transmitted via a transmission mechanism including other gears and clutches meshing with the gear. When the winding is performed in the skein frame winding / unwinding device 1, a driving force is transmitted to the support shaft 3 by connecting a motor to the transmission mechanism. When unwinding is performed, a braking device is connected to the transmission mechanism so that a braking force is transmitted to the support shaft 3 side.

As shown in FIG. 2, on one side of the base plate 4 attached to the support shaft 3, a plurality of ridges 11 are radially arranged around a rotation center A. The skein frame members 5 are slidably connected to each other so that the skein frame members 5 are respectively arranged in a radial direction and can be moved in a direction orthogonal to the rotation center A. Further, each of the skein frame members 5 is provided to be long along the direction of the rotation center A, and in the skein frame 12 configured by a plurality of skein frame members 5 arranged around the rotation center A, By moving each of the skein frame members 5 in the centripetal direction and the centrifugal direction in the same manner, the diameter of the skein frame 12 can be increased and reduced. In the illustrated embodiment, the end of each of the skein frame members 5 opposite to the base plate 4 is bent toward the rotation center A, so that a web roll in a non-core state is placed on the skein frame 12. When the tape is attached, the tapered portion serves as a guide so that the inner peripheral portion of the web roll can be easily attached to the skein frame 12 and easily detached from the skein frame 12.

The cam body 6 provided on each of the skein frame members 5 is a plate member attached so as to project from the inner surface of the skein frame member 5 toward the rotation center A. Two are provided along. And
Each of the cam bodies 6 has an inclined portion 13 inclined from the distal end side (curved distal end side) of the skein frame member 5 toward the base plate 4 so as to approach the support shaft 3 side from the skein frame member 5. It has the parallel part 14 which follows the direction of the rotation center A continuously as a part of side. In one skein frame member 5, the two inclined portions 13 have the same inclination, and the two parallel portions 1
4 has the same distance from the rotation center A. Furthermore, the starting positions of the inclined portions 13 of the cam members 6 on the distal end side of the plurality of skein frame members are concentric, and the starting positions of the inclined portions 13 of the cam members 6 on the base plate 4 side are also concentric. .

As shown in the drawing, one end of the operating shaft 8 is positioned so as to protrude from the hollow portion 7 of the frame portion 2 of the support shaft 3 to the side opposite to the skein frame 12. Are connected to one end of the operating shaft 8 through a stay 16 and a thrust bearing 17, and the operating shaft 8 moves in the hollow portion 7 of the support shaft 3 by the expansion and contraction operation of the air cylinder 15. It is provided so that it can move. The thrust bearing 17
Is used to enable the operating shaft 8 co-rotating with the support shaft 3 to freely rotate with respect to the stay 16 side. Also,
In the drawing, reference numeral 16a denotes a detent shaft having one end attached to the frame portion 2 and penetrating the stay 16, and the stay 16 is not rotated around the viewpoint center A by the detent shaft 16a. It is provided to move in the direction.

The operating shaft 8 moves the sliding body 9 along the direction of the center of rotation A. The hollow portion 7 is supported by the hollow shaft 7 so that the sliding body 9 can be moved at a required distance. 3 are formed in the length direction. And the operating shaft 8
The end on the side opposite to the thrust bearing 17 side is set so as to move on the side of the area where the skein frame 12 is formed, and is shown in FIGS. In the movement range, a long hole 18 is opened in the support shaft 3 along the direction of the rotation center A so as to communicate with the hollow portion 7, and a pin 19 penetrating the end of the operating shaft 8.
Project from the long hole 18 and can move in the longitudinal direction of the long hole 18.

The sliding contact body 9 has a rotation center A so that it can correspond to the inclined portions 13 at two positions in the direction of the rotation center A.
Are provided in the mounting holes 9a provided in the sliding contact body 9 located on the base plate 4 side.
Is mounted, the sliding member 9 on the base plate 4 side and the operating shaft 8 are connected and fixed, and a plurality of rods 20 are connected so that the distance between the two sliding members 9 is constant. Passed between nine. Thus, the operating shaft 8
Moves in the direction of the center of rotation A, the two sliding contact bodies 9 also move in the direction along the center of rotation A while keeping a distance from each other. In FIGS. 1 and 5, the cam body 6 is shown in order to clearly show the connected state of the two sliding members 9.
The rod 20 and the rod 20 are illustrated as overlapping, but the position of the rod 20 is set at a position that does not interfere with the cam body 6 as shown in FIG. Each of the sliding members 9 is made of a material having lubricity, and has a substantially disk shape as shown in FIG. Corresponding grooves 21 are provided, and the inclined portions 13 are fitted into the grooves 21 so as to be slidable. 1 and 5, the pins 19 and the mounting holes 9a are represented so as to correspond to the grooves 21 in order to clearly show the pins 19 and the mounting holes 9a. Set to a position that does not interfere.

The biasing means 10 is composed of a tension spring passed around the center of rotation A through each of the through holes 5a provided in the base end portion of the skein frame member 5,
Each skein frame member 5 is similarly urged in the centripetal direction (the rotation center A side) by the urging means 10 (see FIG. 4).

Since the respective skein frame members 5 are constantly urged toward the rotation center A by the urging means 10 as described above, the cam body 6 is in contact with the sliding contact member 9. ,
If the two sliding members 9 move in the direction along the rotation center A by the movement of the operating shaft 8, the sliding movement of the inclined portion 13 of the cam body 6 fitted into the groove 21 of the sliding member 9 is performed. As a result, each skein frame member 5 moves while being guided by the ridge 11, and the skein frame 12 is enlarged or reduced. In the illustrated embodiment, the inclined portion 13 with which the sliding contact body 9 can slide and contact is inclined toward the rotation center A over the base plate 4 side starting from the inner surface side of the skein frame member 5. Therefore, if the operating shaft 8 moves to the tip side of the skein frame member 5 in a state where the sliding contact body 9 is located at the boundary position between the inclined portion 13 and the parallel portion 14, the skein frame 12 is reduced in diameter. (See Figure 1)
Conversely, if the operating shaft 8 moves in the retreating direction in a state where the sliding member 9 is located at the start end position of the inclined portion 13 or in the middle of the inclined portion 13, the diameter of the skein frame 12 is increased. (See FIG. 5). If the sliding body 9 does not move on the rotation center A, the diameter of the skein frame 12 does not change. In the figure, 22
Is a limit switch, which is capable of detecting that the unwinding from the skein frame has been completed and the diameter of the skein frame material has reached a required position by expanding the diameter. The limit switch 22 can detect the end of unwinding. It is provided as follows.

As described above, the diameter increasing operation and the diameter reducing operation of the skein frame 12 and the maintenance of the diameter size are performed while the skein frame 12 is being unwound and rotated. The tension in the radial direction of the web roll wound around 12 is adjusted so that the tension of the web to be unwound is constant.
Of course, it is possible to change the diameter of the skein frame 12 even when the rotation of the skein frame 12 is stopped. In this case, the skein frame 12 may be expanded before the rotation after the web roll is mounted.
Although the case of unwinding is shown in the above embodiment, the device of the present invention can also be used for winding.

[0018]

According to the present invention described above, the skein frame rotates when the skein frame is rotating and wound by the driving shaft and the required braking force is applied to the support shaft side. During unwinding, even if the sliding body is moved along the direction of the center of rotation, the cam bodies of the skein frame members that slide on the sliding body move in the direction orthogonal to the center of rotation. As the sliding members move, the skein frames move in the same way toward the center of rotation and away from the center of rotation. It expands and contracts without shifting in the axial direction of the rotation center. Also, when unwinding by attaching a web roll that has looseness on the inner circumference side and the inner circumference shape is uneven, when the diameter of the web roll becomes small and the winding starts to loosen, the rotation By increasing the diameter of the skein frame, it is possible to prevent rattling of the unwinding web roll and the skein frame, and to apply a constant pressure in the radial direction of the unwinding web roll. Thus, the tension applied to the web can be kept constant. Furthermore, a cam body slides on a sliding member movable in the direction of the center of rotation without a movable member supported by pins as in a conventional skein frame winding device. Since each frame material is guided in a direction perpendicular to the direction of the rotation center, each skein frame material is supported without play, and the movement distance of each skein frame material when expanding and contracting the skein frame It is possible to adjust the slack of the web roll properly while keeping the web roll constant.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a skein frame winding / unwinding device according to the present invention.

FIG. 2 is an explanatory view showing a base plate in one example.

3A is an explanatory view showing a sliding contact body located on a support shaft, and FIG. 3B is an explanatory view showing an end of an operating shaft to which the sliding contact body is connected.

FIG. 4 is an explanatory diagram showing a state in which the skein frame is viewed from the center of rotation.

FIG. 5 is an explanatory diagram showing a state where the diameter is expanded.

FIG. 6 is an explanatory diagram showing a conventional example.

FIG. 7 is an explanatory diagram showing a conventional example.

FIG. 8 is an explanatory view showing a coreless web roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Skein frame winding / unwinding device 2 ... Frame part 3 ... Support shaft 4 ... Base plate 5 ... Skein frame material 6 ... Cam body 8 ... Operating shaft 9 ... Sliding contact body 10 ... Urging means 11 ... Convex ridge 12 ... Skew Frame 13: Inclined part

Claims (1)

[Claims] 1. A base plate which is disposed so as to penetrate a rotating support shaft as a center and is attached to the support shaft; and a base plate which is disposed around a rotation center of the support shaft and is radially arranged from the rotation center side with respect to the base plate. A plurality of skein frame members which are arranged in a direction and are respectively movably mounted in a direction orthogonal to the center of rotation, and a direction along the center of rotation extending from each of the skein frame members toward the center of rotation. A cam body having an inclined portion inclined with respect to the axis, an operating shaft provided to be movable in a direction along the center of rotation through the support shaft, and a sliding member attached to the operating shaft and sliding on the cam body. A skein frame winding / unwinding device, comprising: a sliding contact member that comes into contact with the skein frame; and a biasing unit that constantly biases the skein frame member toward the center of rotation.