JPH01214590A - Side run winding core and its usage - Google Patents

Abstract

PURPOSE:To make it possible to easily remove a core from a winding body after using the core by forming a cylindrical body of the core made of elastic material with a notched part in a direction of its generating line, and both end faces of the notched part into a tapered face widening inward to insert a key. CONSTITUTION:A cylindrical body 10 of a core fitted on a shaft 4 is made of elastic material, and provided with a stripe of a notched part 12 in a direction of its generating line. Both end faces 13 of the notched part are formed into tapered faces widening toward an inside hollow part 14 of the body 10. When the body 10 is fitted on the shaft 4, it expands against elastic force into a cylindrical shape, and a key 15 widening toward the inside end is pushed into the notched part 12 expanded as above-mentioned, and a side run is wound on the body 10. When the core is then removed from the shaft 4, the elastic force of the body 10 makes the key 15 fall off into the hollow part 14. The body 10 therefore shrinks, and can be simply removed from a side run winding body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a core for winding up side runs that occur when continuous paper or the like is made into a rolled product, and a method for using the core.

[Conventional technology]

Paper produced by a paper machine is cut into a desired width by a winder, and then wound up as shown in FIG. 7, for example.

In this figure, numeral 1 indicates a rolled body as a product, and numeral 2 indicates a side run rolled body.

These winding bodies 1, 2 are wound around a core 3 made of a paper tube, and the core is prepared in advance for each winding body 1.2 and held on the shaft 4 of the winder. Then, the core 3 rotates together with the shaft 4 by the drive of the winder, and winds up the cut paper. When the winding is finished, the shaft 4 is pulled out of the core 3, and the various rolled bodies 1 and 2 are rolled up. Obtainable.

Among these, the side run roll is collected as waste paper and sent to a waste paper processing device such as a pulper for processing.

In this case, it is necessary to remove the core 3 from the winding body 2.

Conventionally, as shown in FIG. 8, the winding body 2 of the side run
Place it on the pedestal 5, place the net jig 6 against the core 3, and hit the jig 6 with a large hammer 7 to knock the core 3 out of the winding body 2. I'm trying to get it out.

However, in the above method, the width of the winding body 2 becomes large and the width becomes 150 mm.
When it reaches the point where it exceeds that of my friend, core 3 will not come out. In such a case, as shown in FIG. 9, the core 3 is removed by cutting the paper layers one by one using a knife 8 and peeling them off.

[Problem to be solved by the invention]

The conventional core structure described above has no choice but to be removed by the above method, but this method is inefficient because it is manual work.
Moreover, it is dangerous because a hammer or the like is used.

Accordingly, an object of the present invention is to provide a core structure and a method for using the core that can be taken out of the side run winding body without using the above-mentioned dangerous method.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention includes a cylindrical body made of an elastic material, a single notch provided along the generatrix of the cylindrical body, and a key fitted into the notch. The end face of the notch and the end face of the key in contact with the end face are formed with a taper that widens towards the hollow part of the cylindrical body, and the contact between the two end faces causes the above-mentioned The cylindrical body resists the elastic force and is held expanded into a perfect circle.

Further, as a method of using such a side run winding core, the winder shaft is inserted into the hollow part of the cylindrical body and the key is fitted into the notch to form the side run winding core, and then the side run winding core is made into a side run winding core. After winding the side run around the core, the shaft is pulled out of the core, the cylindrical body is contracted by elastic return, and the key is released, and then the key and the cylindrical body are pulled out to form the side run winding without the core. The procedure is to obtain repossession.

[For production]

Attach the side run winding core to the winder shaft together with the product winding core.

Since the product winding core is made of a cylindrical body such as a paper tube, the core can be fixed by simply inserting a shaft into the hollow part of the core, but when installing the side run winding core, the key must be inserted into a cylindrical shape. Since it is necessary to fix the key within the notch of the main body, it is necessary to use a jig or the like or to fit the key into the notch after attaching the cylindrical main body to the shaft.

In the latter method, the shaft is inserted into the cylindrical body and the cylindrical body is expanded into a substantially perfect circle. As a result, the cylindrical body is elastically deformed, and the elastic force causes the cylindrical body to be closely fixed to the circumferential surface of the shaft. Thereafter, a key is fitted into the notch of the cylindrical body to complete the side run winding core.

After that, the cut paper is wrapped around each of the above-mentioned cores.

After winding a predetermined length, the shaft is pulled out to obtain a product winding body and a side-run winding body. From the side-run winding body, the above-mentioned shaft is pulled out from the side run winding body, from which the core needs to be removed as described above. Then, by pressing the key toward the hollow part, the core can be easily disassembled.

That is, since the notch of the cylindrical body and the key are in contact with each other through a tapered surface that widens toward the hollow part of the cylindrical body, an elastic force acts when the cylindrical body returns to its original shape. As a result, the key is forced out into the hollow part of the cylindrical body.

Therefore, the key can be immediately removed, and since the diameter of the cylindrical main body is reduced, it can be separated from the winding body and easily taken out of the winding body.

Thereafter, the side run roll is supplied to a pulper or the like as a single piece of paper without a core.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, the side run winding core 9 includes a cylindrical main body lO made of synthetic resin, which is an elastic material, and a key 11.

The cylindrical body 10 has a notch 12 along its generatrix.
is provided, and its end surface 13 is finished smoothly. Further, the cylindrical main body 10 is formed to have a slightly smaller diameter than that shown in FIGS. 1 and 2, as shown by the broken line in FIG. Therefore, the width of the notch 12 is also slightly reduced when the key 11 is not present. Further, the end surface 13 of the notch 12 is formed with a taper that widens toward the hollow portion of the cylindrical main body 10.

As shown in FIG. 2, the key 11 is a bar whose cross section is approximately trapezoidal, and the surfaces corresponding to the upper and lower bases of the trapezoid are flush with the outer and inner peripheral surfaces of the cylindrical main body 10. It is formed into a curved surface as shown in FIG.

By inserting the key 11 into the notch 12 of the cylindrical main body 10, the side run winding core 9 is completed, and in this state, the end surface 13 of the notch 12 and the key 11
The end face 15 of the cylindrical body 10 is in close contact with the cylindrical body 10, and the cross section of the cylindrical body 10 is held expanded to a perfect circle against the elastic force.

In addition, since the cylindrical main body 10 is elastically deformed in this way, it cannot maintain the perfect circular shape as the core 9 as it is. Therefore, when in use, the hollow part 1 should be
It is necessary to insert a cylindrical body consisting of a shaft into 4.

Next, a method of using the side run winding core 9 will be explained.

As shown in FIG. 3, the winder shaft 4 is inserted into the hollow part 14 of the cylindrical body 10.

At this time, the cylindrical body 10 is expanded from the state shown by the broken line to the state shown by the solid line, and is elastically deformed. Therefore, the inner circumferential surface of the cylindrical main body 10 is in close contact with the circumferential surface of the winder shaft 40.

Next, the key 11 is inserted into the notch 12 of the cylindrical main body 10. As a result, the end surface 15 of the key 11 has a cutout portion 12.
comes into contact with the end surface 13 of. Furthermore, due to the presence of the taper and the presence of the shaft 4, the key 11 will not fall out after being accommodated within the notch 12.

Note that other product cores (not shown) are also inserted and fixed relative to the shaft 4.

The shaft 4, on which various cores are attached in this way, is rotated by the drive of a winder (not shown), and as shown in FIG. 4, each core is loaded with paper as a product.

The side runs as waste paper are wound respectively. When a predetermined length of paper has been wound in this manner, the winder is stopped and the yarn 4 is pulled out of the core 9.

Then, the winding body 2 of the side run, which was in the state shown in FIG. 5 before the shaft was pulled out, changes to
At the same time as the key 11 is released from the bias by the Yant 4, it is pushed toward the hollow portion and easily removed, resulting in the state shown in FIG. 6.

That is, the 2790 cylindrical body 10 tries to return to its original shape due to its elasticity, and the force for this acts on the tapered end surface 13.15, so that the key 11 falls into the hollow part 14 of the cylindrical body 10. do. Then, the cylindrical main body 10 contracts, and its outer circumferential surface peels off from the inner circumferential surface of the side run winding body 2.

Thereafter, the key 1 and the cylindrical main body 10 are removed to the outside of the roll 2, but this operation does not require any separate tools and can be easily performed by hand.

The side-run wound body 2 from which the core 9 has been removed is then sent to a pulper (not shown).

〔Effect of the invention〕

The present invention is constructed as described above, and by pushing the key toward the hollow part from the cylindrical body due to the elasticity and taper of the cylindrical body, the key can be easily separated and the diameter of the cylindrical body can be contracted.

Therefore, there is no need to use a hammer or a knife as in the past, and the core can be removed extremely easily, quickly, and safely.

Further, according to the conventional method, the core required for side-run winding cannot be reused, but according to the present invention, since the core is not damaged when the core is removed, it can be reused, which is extremely economical.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention, FIG. 1 is a perspective view of a side run winding core, and FIG. 2 is a perspective view of a side run winding core.
3 is an exploded perspective view of the side run winding core, FIG. 4 is a perspective view of the side run winding body and product winding body held on the winder shaft, and FIG. 5 is an enlarged cross-sectional view taken along the -n line. 6 is a side view of the side run winding body with the winder shaft inserted, FIG. 6 is a side view of the side run winding body with the winder shaft pulled out and the key removed, and FIG. 9 to 9 show a conventional example, FIG. 7 is a perspective view of a side-run winding body and a product winding body held on a winder shaft, and FIG. 8 is an explanation of a core extraction method using a hammer or the like. 9 are explanatory diagrams of a core extraction method using a cutter. 1: Product winding body, 2: Side run winding body, 4: Shaft, 9: Side run winding core, 10: Cylindrical main body, 11
: Key, 12: Notch, 13° 15: End face, 14: Hollow part. Applicant Oji Paper Co., Ltd.

Claims (2)

[Claims] (1) A cylindrical body is formed of an elastic material, a single notch is provided along the generatrix of the cylindrical body, and a key is fitted into the notch, and the end surface of the notch and the end surface of the key that is in contact with the end surface is formed with a taper that widens toward the hollow portion of the cylindrical body, and the contact between the two end surfaces causes the cylindrical body to release its elastic force. A side-run winding core characterized by being expanded and held in a perfect circle against the winding. (2) A cylindrical body made of an elastic material and having a single cutout along the generatrix, and a key fitted into the cutout, the end face of the key being in contact with the end face of the cutout. A method of using a side-run winding core formed with a taper that widens toward the hollow part of the cylindrical body, the winder shaft being inserted into the hollow part of the cylindrical body. At the same time, the key is fitted into the notch to form a side run winding core, and after winding the side run around the core, the shaft is pulled out of the core and the cylindrical body is contracted by elastic return. A method of using a core for side run winding, characterized in that the key is released, and then the key and the cylindrical body are removed to obtain a side run winding body without a core.