JPH045491Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a core support in a sheet roll unwinding section or a sheet roll winding section of a slitter winding machine, sheet rewinding machine, etc.

(Prior art) Conventionally, as this type of core support,
The type disclosed in Publication No. 44783, etc., that is, an inclined surface that is movable in the axial direction of the core from both ends of the core having a hollow portion and that engages with the inner circumferential surface of the core at the tip. There was a method in which the winding core was fixed by inserting a pair of right and left cone-shaped supports in the form of cutlery.

(Problem that the invention aims to solve) However, recently there has been a tendency to manufacture sheets made of extremely thin and extremely slippery materials. Even if it is tightly wound, the upper sheet in particular often slips in the axial direction of the winding core, causing end face displacement due to tension fluctuations that occur during and during unwinding. and,
The above-mentioned edge misalignment not only causes the sheet to run out of its normal position, causing damage to its edges, but in the worst case, the sheet may break, making it impossible to unwind. invite

On the other hand, there is also a type in which side plates are pre-installed at both ends of the core to prevent end-face slippage, but in this type, the core with side plates is used from the stage of sheet winding before unwinding the sheet roll. Therefore, it is not suitable for precision winding using modern Tatsuchi rollers, and the sheet winding length (sheet roll diameter) and side plate diameter match, and the sheet width and core length match. It belongs to
Since only a core having a desired inner diameter can be used, many types of cores with different specifications must be prepared, resulting in problems such as increased production costs and increased storage space for the cores.

(Means for Solving the Problems) Therefore, the core support of the present invention moves in the axial direction of a strip-shaped sheet roll that is wound or is wound on a core that has a hollow portion at least at both ends. The winding core has an inclined support part that engages with the inner circumferential surface of the hollow part to support the winding core when inserted into the hollow parts at both ends of the winding core, and maintains a distance from each other. It has a pair of left and right rotating supports facing each other, and an outer diameter that can come into contact with the end surface of the sheet roll,
end support means provided corresponding to each of the rotary supports, the end support means being movable and adjustable along axial guide means provided on the corresponding rotary support; It is characterized by being able to rotate synchronously with the support.

(Function) Therefore, according to the present invention, it is possible to move from both ends of the core having hollow portions at least at both ends in the axial direction of the belt-shaped sheet roll wound or to be wound on the core. A pair of rotary supports are inserted, and the inclined support portions of the rotary supports are engaged with the inner peripheral surface of the hollow part of the core to partially support the core and abut against the end surface of the sheet roll. a pair of end face support means having a possible outer diameter dimension, movable along axial guide means respectively provided on the pair of rotary supports, and rotatable in synchronization with the rotary supports; The left and right end surfaces of the sheet roll can be supported by being brought into contact with the end surfaces of the sheet roll.

(Example) Below, the first example shown in Figures 1 to 3, and the second example shown in Figure 4.
The present invention will be explained based on examples. Note that, since the core support of this embodiment is symmetrical, for convenience, all the drawings depict one (left) core support and its supporting state.

First, the first embodiment shown in FIGS. 1 to 3 will be explained. In this embodiment, the above-mentioned rotating support body is formed on the support shaft head 1 and at the rear end of the support shaft head 1 (top left end in FIG. 1). It consists of a support shaft 2 inserted into a hollow part. The support shaft head 1 and support shaft 2 are as follows:
It is fixed by a bolt 3 inserted in the axial direction from the tip of the support shaft head 1 and a key 4 interposed between the hollow part at the rear end of the support shaft head 1 and the outer circumference of the support shaft 2, and can rotate synchronously. . The support shaft 2 has one end connected to a well-known axial movement means for a winding core via a bearing (not shown). Therefore, since the support shaft 2 and the support shaft head 1 are movable in the axial direction of the winding core by the movement mechanism, the distance between the left and right support shaft heads 1 can be changed as appropriate.
The axial movement means may include a fluid pressure cylinder, a threaded shaft, or a mechanism in which the threaded shaft is rotationally driven by a motor or the like to move the support shaft in the axial direction. However, there are cases where the support shaft is pushed or pulled manually either directly or indirectly. The support shaft head 1 has an inclined surface 5 formed on its outer periphery and has a well-known cone shape. Therefore, when the support shaft head 1 is inserted into the hollow part of the winding core C of a paper tube or the like in the axial direction, both of the above-mentioned inclined surfaces 5
It is possible to engage and integrate between the core inner peripheral surface 6 and the winding core inner circumferential surface 6. Note that this support shaft head 1 has an inclined surface 5.
Four grooves 7 are formed at equal intervals in the circumferential direction. This groove 7 is formed between the support shaft head 1 and the core inner circumferential surface 6.
It acts to increase the friction between the In addition, since the support shaft head 1 of this embodiment has the inclined surface 5 for frictional engagement formed on the outer periphery as described above, the size of the core can be changed according to the winding specifications, and the inner diameter of the core can be changed. However, there is no need to replace the support shaft head with a different outer diameter.
If the inner diameter of the winding core changes drastically, remove bolt 3.
and by releasing the fixation with key 4,
It is also possible to replace the support shaft head 1 with one of a different outer diameter or length. Reference numeral 8 denotes guide grooves formed at four equal intervals in the circumferential direction of the outer periphery of the support shaft head 1 so as to have bottom surfaces parallel to the axial direction of the winding core, and constitute the above-mentioned axial guide means.

The end surface support means in this embodiment has an outer diameter dimension that can come into contact with the R end surface of a sheet roll mainly made of paper, plastic film, etc., and has a diameter slightly larger than the maximum outer diameter of the support shaft head 1. It has a donut-shaped side plate 9 having a hole in the center and is concentric with the support head 1, and has an inner diameter larger than at least the maximum outer diameter of the support shaft head 1, and is secured by four screws 10. It is composed of a support ring 11 fixed to the side plate 9. The side plate 9 is made of plastic, for example.
On the inner periphery of the support ring 11, four
radially inward sliding bodies 12 are attached. The size and position of the sliding body 12 correspond to the width and position of the guide groove 8 described above. Therefore,
The sliding body 12 and the support ring 11 and side plate 9 integrated therewith can rotate in synchronization with the support shaft head 1 by positioning the sliding body 12 within the guide groove 8. Note that three of the four sliding bodies 12 are attached to the support ring 11 with bolts 13 as shown in FIG.
However, as shown in detail in FIG. 3, the remaining one is secured by a set screw 16 that is screwed into a threaded portion 14a formed at the top of a radial through hole 14 formed in the support ring 11. In the sliding body 12, the through hole 18a corresponds to the small diameter hole 14b formed at the lower part of the through hole 14,
One end of the head 15a is capable of contacting the outer periphery of the support shaft head 1, and the upper end of the head 15a, which has an outer diameter larger than the inner diameter of the hole 14b formed at the other end, is inserted into the set screw 1 within the hole 14c.
By advancing the pin 15 that can make contact with the support ring 11 and the support shaft head 1 inward in the radial direction,
It is fixed at Furthermore, even when the supporting shaft head 1 is not present, the sliding body 12 is equipped with a set screw screwed into an axial screw hole 18b that penetrates from one end surface (upper right end surface in FIG. 3) to the through hole 18a. 17
If the pin 15 is pushed from the side and fixed in the through hole 18a (sliding body 12), the head 1 of the pin
5a is the hole 1 formed in the through hole 14 of the support ring 11
4b and the hole 14c, so it does not fall off.

By supporting the winding core C with the winding core support of this embodiment,
An example of unwinding a sheet from a belt-shaped sheet roll R will be briefly described below. First, a pair of left and right support shafts 2 are
Then, the support shaft head 1 is moved back, and the core on which the belt-shaped sheet roll R is wound is positioned on the outer periphery during the mutual spacing. In this case, the support shaft head 1
A corresponding sliding body 12 is slidably inserted into each guide groove 8 formed on the outer periphery of the slider. That is, the support ring 11 and the side plate 9 fixed thereto and having a desired outer diameter dimension are externally inserted onto the support shaft head 1. Next, the left and right support shafts 2 and support shaft heads 1 are advanced together using the aforementioned axial direction moving means, and the left and right support shaft heads 1 are respectively inserted into the hollow part of the winding core C, and the outer peripheral inclined surface 5
and the inner circumferential surface of the winding core C. Next, in order to bring the side plate 9 into contact with the end surface of the sheet roll R, the position is adjusted by moving it in the axial direction along the guide groove 8. Once the position is determined, turn the set screw 16 to set the pin 15 on the support shaft. Press it against the surface of the head 1 (bottom surface of the guide groove 8) and fix it. If the belt-shaped sheet roll R is unwound in this state, it will not shift because its left and right end surfaces are supported by the side plates 9, respectively. When the unwinding operation is completed, the core is unsupported by, for example, the reverse procedure to the above procedure.

As mentioned above, the support shaft head 1 is replaceable, and the support ring 1 is replaceable depending on the sheet roll diameter, etc.
Of course, it is also possible to replace 1 and the side plate 9, or only the side plate 9.

Next, the characteristic parts of the second embodiment shown in FIG. 4 will be explained. Note that in the drawings, the same members and the like as those in the first embodiment are designated by the same reference numerals, and explanations thereof will be omitted. In this second embodiment, a donut-shaped wall 20 is attached to the rear end surface of the support shaft head 1 with screws 23 so as to be located at the rear end of the guide groove 8 formed in the support shaft head 1.
A spring 21 is interposed between the sliding body 12 and one sliding body 12. Reference numeral 22 denotes a stopper provided near the tip of the bottom surface of the guide groove 8, and the sliding body 12 in a state where the winding core C is not supported is the same as the spring 21.
This prevents the side plate 9 and the like from falling off the support shaft head 1 due to the force of the support. In addition, it is preferable that the stopper 22 uses a removable screw, pin, etc. in order to make the side plate 9 replaceable.

Therefore, in this second embodiment, when the support shaft head 1 is inserted into the hollow part of the winding core C, the sliding body 12 retreats along the guide groove 8 against the force of the spring 21. Along with this, the side plate 9 gradually moves rearward while in contact with the end surface of the sheet roll, and its position is adjusted. And the sliding body 12 or the side plate 9
is automatically positioned when the winding core is supported. In the case of this embodiment, in order to ensure the positioning of the side plate 9, the first embodiment (third embodiment)
A fixing mechanism to the support shaft head 1 similar to that shown in the figure) is provided at one of the four sliding bodies 12 and at a corresponding location on the support ring 11, but the force of the spring 21 is relatively strong and the sliding If it is possible to strongly press the side plate 9 against the seat end surface without fixing the moving body 12 to the support shaft head 1, the fixing mechanism described above may be omitted. Further, four springs 21 may be provided for each sliding body 12, or less than four springs 21 may be provided.

Although the present invention has been explained above based on a small number of embodiments, it goes without saying that the present invention can be varied and applied in various ways using well-known techniques of designers etc. without departing from the scope of claims for utility model registration. Nor.

For example, the side plate used as the end support means is not limited to a donut shape, but may also be a propeller shape with three blades, four blades, or the like. Further, the side plate does not have to have a hole with a diameter larger than the maximum outer diameter of the support shaft head as in the illustrated embodiment. The hole may have a diameter that is large enough to be retracted from the tip of the support shaft head so that the head can support the inner periphery of the core. When supporting a core with a small diameter, the end face of the sheet roll near the core (just before the end of sheet roll unwinding) may not come into contact with the side plate due to holes in the side plate, but the deviation of the end face of the sheet roll This is not a problem because it hardly occurs when the sheet roll diameter is small. In the illustrated embodiment, the sliding body provided on the support ring is inserted into a guide groove formed on the support shaft head and guided in the axial direction.
The shape, number, and location of the guide grooves are not limited. Furthermore, the support shaft head or the outer periphery of the support shaft may be directly used as the guide surface, and in that case, a sliding body such as the illustrated embodiment may be used. Instead, an annular sliding body may be used, or the support ring may be directly fixed to the outer periphery of the support shaft or the like using a key, screw, or the like. The illustrated embodiment is
Although the support shaft and the support shaft head rotate integrally, a bearing may be interposed between them so that only the support shaft head can rotate. Further, the winding core only needs to have a hollow portion at least at both ends, and does not need to be a hollow cylinder as a whole.

Furthermore, it is also possible to use the present invention as a core support on the sheet winding side, in which case,
The left and right supports may be actively rotationally driven by a well-known drive mechanism, or only one support may be actively rotationally driven, and the other may be driven to rotate.

(Effects of the Invention) As described above, according to the present invention, even when a sheet made of a thin and slippery material is unwound or wound up, the end face of the sheet roll does not shift. Therefore, it becomes possible to unwind or wind up the sheet reliably and appropriately.
Furthermore, the end face support means can be moved and adjusted in the axial direction of the core, so even if the inner diameter of the core changes and the relative position between the supporting part of the support and the core changes, it will move accordingly, and the sheet Since it can support the end face of the roll, it has extremely high adaptability. Therefore,
Unlike the case where side plates are pre-installed at both ends of the winding core to prevent end-face misalignment, there is no need to prepare winding cores with many specifications, making it possible to save costs and to save storage of side plates, etc. There is no fear that the space will increase.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a cross-sectional explanatory view of one of the core supports, FIG. 2 is a side view of the same, and FIG. 3 is a side view of the same. FIG. 4 is an enlarged explanatory view of the main part, and FIG. 4 shows a second embodiment of the present invention, and is an explanatory cross-sectional view of one of the winding core supports. DESCRIPTION OF SYMBOLS 1... Support shaft head, 2... Support shaft, 5... Inclined surface, 6... Core inner peripheral surface, 8... Guide groove, 9... Side plate, 11... Support ring, 12... Sliding body , C... core, R... sheet roll.

Claims (1)

[Scope of utility model registration request] It is movable in the axial direction of a belt-shaped sheet roll wound or to be wound on a core having hollow portions at least at both ends, and when inserted into the hollow portions at both ends of the core, the hollow portion The sheet roll has an inclined support part on the outer periphery that engages with the inner peripheral surface of the sheet roll to support the core, and can come into contact with a pair of left and right rotating supports that face each other with a distance therebetween, and the end surface of the sheet roll. and an end face support means provided correspondingly to each of the rotary supports, the end face support means being provided along an axial guide means provided on the corresponding rotary support body. A winding core support that is adjustable in movement and rotatable in synchronization with the rotating support.