JPH04106075A - Core for winding winding sheetform product side run and using method thereof - Google Patents

Abstract

PURPOSE:To facilitate pull-off of a shaft and pull-out of a core by forming the end surfaces of the gap of a core body such that the extensions of the end surfaces and the extensions of the two sides of a key are spread toward the outside of a cylinder so that the extensions cross each other between the axis of the cylinder and a gap position. CONSTITUTION:Two body gap end surfaces 11a and 11a and two sides 13a and 13a of a key 13 in a state that a key 13 is engaged with a gap 12 of a core body 11 are formed in a taper shape, spreading toward the outside of a cylinder, so that an intersection line is positioned O'. The key 13 is mounted on a shaft 1 in a state that it is engaged with the gap of the core body 11. The shaft is set to a winder, a sheet paper product the width of which is cut to a given value like a conventional product and side runs being remaining parts on both sides are wound to form a side run roll 4 and a product roll 3, from which the shaft 1 is pulled off. Only the key, 13 of the core of the roll 4 is struck out by means of a caul tool 6 and a hammer 7. The striking out of the key 13 is practicable by means of a comparatively low force.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding core for side run that occurs when a sheet-like material such as a band-shaped paperboard is continuously wound while being cut to a predetermined width. and how to use it.

[Conventional technology]

Generally, a sheet-like material such as a wide band of paperboard as an intermediate product is finally cut into a predetermined width and rolled onto a core with side runs on both sides that cannot be made into a product. Roll up into a shape. The winding state, the subsequent work of removing the core of the side run, and the key-incorporated core that has been proposed in recent years will be explained with reference to the drawings.

Figure 5 is a perspective view of a sheet-like material being wound up on a conventional core for a winder, and Figure 6 is a part of the method for removing the core from the side-run roll shown in Figure 5. 7 is a perspective view of a conventional key-incorporated winding core, and FIG. 8 is an explanatory diagram of a state in which a sheet-like material is wound around the winding core of FIG. 7.

A paperboard used in a paper manufacturing process will be described as an example of a sheet-like product. When a wide band-shaped paperboard is cut into a predetermined width while running, a site run, that is, a part that cannot be made into a product, occurs on both sides of the paperboard. Therefore, as shown in Fig. 5, the required number of product cores (in the case of rotating, one is simply shown) and the side run cores 2 are attached to the shaft 1 for the winder. The paperboard products are mounted close to each other in advance, and the paperboard product cut into a predetermined width and the side runs remaining on both sides thereof are wound up to form a product roll 3 and a side run roll 4. After winding is completed, roll winding 3,
Pull out shaft 1 from 4.

Since the side run is supplied to a waste paper processing device such as a pulper in order to reuse it as a raw material for papermaking, it is necessary to extract the side run core 2, which is made of different raw materials, from the side run roll 4. . This work is carried out as shown in Fig. 6.
is placed, the abutment tool 6 is applied to the side run core 2, and the side run core 2 is struck out with the hammer 7. However, since the side run core 2 is subjected to a large amount of seaming pressure from the many layers of side runs applied to its entire circumferential surface, the removal of the side run core 2 requires a large hammer 7 and strong arm strength. It was hard work that required a lot of work, and the side run core 2 was also damaged and could not be reused.

Therefore, recently a winding core was proposed to facilitate the removal of the side run winding core 2 (Japanese Patent Application Laid-Open No. 1-214590).
(see publication).

As shown in Fig. 7, this side-run winding core has a gap (called a notch) of a predetermined width in the wall of the cylindrical body parallel to the cylinder axis and extending over its entire length. It consists of a winding core body 8 in which a winding core 9 is formed, and a key 10 that is fitted into this gap 9 to complete the winding core shape. ), when the key 10 is inserted into the gap 9 of the core body 8, the two body gap end faces 8a, 8a and the key 1, which face each other across the gap 9,
Both side surfaces 10a, 10a of 0 are in contact with each other. The core body 8 is made of an elastic material made of synthetic resin, and when the key 10 is inserted into the gap 9, the width of the gap 9 in its natural state is expanded to form a perfect circle with an appropriate diameter. , elasticity is generated that acts to reduce the width of the gap 9, that is, its diameter. In the fitted state, the shape formed by both side surfaces 10a, 10a of the key 10, and therefore the gap end surfaces 8a, 8a of the core body 8 which are in contact with the key 10, is oriented in the direction of the cylinder axis of the core body 8. It has a tapered shape that widens at the end. As shown in FIG. 8, the function of this conventional winding core with built-in key is to attach the winding core body 8 and key 10 to the winding machine shaft 1, wind up the side run, and then pull out the shaft 1. key 10
If you push in the direction of the cylinder axis, the key 1 will be pressed due to its tapered shape.
0 is easily removed, and the core body 8 shrinks in diameter to its original natural state due to its elasticity, so that the core body 8 can also be easily pulled out from the side run roll winding 4. However, in practice, pulling out the shaft 1 from the state shown in FIG. 8 is difficult because the shaft 1 is firmly held by the key 10 and the shaft 1 is long, so the method shown in FIG. 6 cannot be used. This was also a difficult task that required strong physical strength (the reason for this will be discussed later in comparison with the present invention).

[Problem to be solved by the invention]

An object of the present invention is to eliminate the drawbacks of the above-mentioned prior art, improve the key-incorporated winding core, and facilitate the pulling out of the shaft and the winding core after side-run winding.

[Means to solve the problem]

As a result of various studies, the inventors of the present invention have found that the above problem can be solved by making the shape of the key of the conventional key-incorporated winding core, and therefore the shape of the gap into which the key fits, tapered, which is the opposite of the conventional shape. The present invention was thus completed.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a perspective view showing one example of the core for side-run winding of sheet-like materials according to the present invention separated into a core body and a key;
The figure is a perspective view showing the completed state of the winding core for side run winding of sheet-like material shown in Figure 1 with a key inserted into the core body, Figure 3 is an explanatory view showing the state of the side surface of the key, The figure is an explanatory view of the tapered shape formed by the end faces of the gap between the two bodies and both side faces of the key when the key is fitted into the gap of the core body, as viewed from the direction of the cylinder axis.

The core for side-run winding of sheet-like materials according to the present invention includes a core body having a predetermined gap formed in the cylindrical wall as described above, and a key fitted into the gap.
Both body gap end surfaces 11a, 11 of the core body 11 shown in the figure
The shapes of the two side surfaces 13a, 13a of the key 13 are as follows. That is, the second
As shown in the figure, the end surfaces 11a, 11a of the gap between the two main bodies in a state where the key 13 is inserted into the gap 12 of the core body 11.
and both sides 13a, 13a of the key 13.

As shown in FIG. 4, when each surface is extended, the core body 11
on the cylinder axis O or at the position W of the gap 12 between the cylinder axis O (Fig. 2, Fig. 4)
When the key 13 is inserted as shown in the figure, the key 1
(same as position 3) (the latter in the case of rotation)
For example, it is formed into a tapered shape that widens toward the outside of the cylinder, as shown in Fig. 4, where there is an intersection 'mO'.
This has a tapered shape that is exactly the opposite of the conventional key-incorporated core.

Generally, the core body 11 is made of core paper such as paperboard made from screen residue, and the key 13 is made of wood, and both the body gap end face 11a and the side face 13a of the key 13 have a moderately rough surface. Therefore, the key 13 is attached to the winding core body 1.
It is possible to wrap the side run several times by inserting it slightly into the gap 12 of 1 so that the respective surfaces are in contact with each other, maintaining this inserted state and rotating gently. At this time, if the key 13 cannot be maintained well fitted into the gap 12 of the core body 11, it is okay to temporarily fix the key 13 and the core body 11 with adhesive tape, etc. As the tape, adhesive tape or the like for fixing the tip of the side run to the winding core can be used instead. In order to ensure that the core body 11 of the key I3 remains inserted into the gap 2, a friction surface sufficient to hold the key 13 in the inserted state is artificially created by, for example, a large number of small irregularities. The side end surface 1 of the winding core body 11
1a and/or the side surface 13a of the key 13 (hereinafter sometimes referred to as the first aspect). In order to further ensure this fitted state, the key 13 is fitted into the gap 12 as shown by the dashed line in FIG. Set the key 1 in the gap 12 so that it has a smaller diameter than the original state.
3 is pushed into the key 13, it is more preferable that the material of the core body 11 has some elasticity to generate elasticity that pinches the key 13 (hereinafter referred to as the second mode). be).

The core for side-run winding of sheet-like materials according to the present invention is used in the following manner. First, the key 13 is inserted into the gap in the core body 11 to complete the core, and the completed core is mounted on both sides of the shaft 1 together with the product core. In cases other than the second embodiment, the core body 11 may be mounted on the shaft 1 and then the key I3 may be inserted to complete the core. The shaft 1 with each winding core attached in this way is set in a winding machine, and the paperboard product cut into a predetermined width in the conventional manner and the side runs, which are the remaining parts on both sides, are wound up to form a site run roll 4 and a product roll. Winding 3 is made, and shaft 1 is pulled out from these. This work of pulling out the shaft 1 can be done relatively easily (the reason for this will be discussed later). Next, press only the key ■3 on the winding core of side run roll winding 4 to tJ.
\Punch out with small abutment tool 6 and hammer 7. in this case,
Since the contact surface of the key 13 with the side run roll winding 4 is much smaller than that of the conventional sight run winding core 2,
The key 13 can be driven out with a relatively small force. Then between IJ! In the case of the second embodiment, the core body 11 in which the number 12 is generated is reduced to its original small diameter and can be removed by hand, and even in other embodiments, the material of the core body 11 is generally slightly deformed. Side run roll winding 4 as possible
The winding core body 11 is made smaller in diameter to narrow the width of the gap 12 due to the tightening pressure of
can be launched. For this type of punching work of the key 13 and core body 11, a table 5 as shown in FIG. 6 may be used, but it is also possible to punch the keys 13 and core body 11 horizontally with the shaft 1 pulled out. be. The keys 13 and core body 11 that have been punched out or extracted in this way are hardly damaged and can be reused.

[For production]

The functions of the winding core for side-run winding of a sheet-like material according to the present invention and the conventional core are inferred as follows.

There is usually some clearance (not shown) between the outer circumferential surface of the shaft 1 and the inner circumferential surface of the winding core so that the shaft 1 can be inserted and withdrawn freely. When the side run is wound around the winding core, the large winding pressure becomes a force that acts along the circumferential surface in the direction of reducing the diameter of the winding core due to the presence of the clearance. When the core is a conventional core with a built-in key, the above force acts on the contact surface between the core body 8 and the key 10, and due to its tapered shape, the key 10 moves in the direction of the arrow X as shown in FIG.
In other words, it will be pressed with a strong force toward the shaft 1. Furthermore, due to the tapered shape of the key 10 and the gap end face 11a of the main body, the tightening pressure of the winding side run also applies a force that directly presses the key 10 against the shaft 1.

On the other hand, when the winding core is the winding core for side-run winding of sheet-like materials according to the present invention, due to the tapered shape of the key 13, the arrow shown in FIG. It is pressed in the Y direction, that is, in the opposite direction to the shaft 1, or at least no pressing force is generated toward the shaft 1 side.

In both of these conventional key-embedded winding cores and the winding core for side-run winding of sheet-like materials according to the present invention, each key 1 is
It is conceivable that the core bodies 8 and 11 around 0.13 are displaced in directions opposite to the direction of the key 8.10, thereby weakening the influence of the movement of the key 10.13. However, these winding core bodies 8 and 11 are generally extremely sturdy, with an inner diameter of 8 mm and a thickness of 15 m or more, and although there may be some deformation due to the strong pressure of one winding side run, the shaft It is not something that can be directly conveyed to 1,
Further, it is considered that the pressing force toward the shaft side as a reaction force for pressing the key 13 in the direction opposite to the shaft 1 in the winding core for side-run winding of a sheet-like material according to the present invention is weak.

In addition, in the core for winding up sheet-like material side run according to the present invention, the winding pressure of the winding side run acts to directly press the key 13 against the shaft 1 due to the tapered shape of the main body gap end surface 11a and the key 13. do not. Taken together, it is thought that whether or not the key 10.13 is pressed against the shaft 1 greatly influences the difficulty in pulling out the shaft 1 from the side run roll winding 4. The core serves to prevent the key 13 from being pressed against the shaft 1.

〔Effect of the invention〕

As described in detail above, although the core for side-run winding of sheet-like materials according to the present invention is a core equipped with a key, the gap between the two main bodies when the key is inserted into the gap between the core bodies is A state in which the side run is wound up by configuring the end face and the extensions of both side surfaces of the key in a tapered shape that widens toward the outside so that they intersect on the cylinder axis or between the cylinder axis and the position of the gap. However, the key is not pressed against the shaft, so it is relatively easy to pull out the shaft from the side run roll winding, and the key and core body can subsequently be punched out with a relatively small force. And since the core body and key can be recovered without being damaged, they can be used repeatedly.

The industrial value of the present invention having such effects is extremely large.

[Brief explanation of drawings]

1st @ is a perspective view showing an example of the core for side-run winding of sheet-like materials according to the present invention separated into a core body and a key;
The figure is a perspective view showing the completed state of the winding core for side run winding of sheet-like material shown in Figure 1 with a key inserted into the core body, Figure 3 is an explanatory view showing the state of the side surface of the key, The figure is an explanatory view of the tapered shape formed by the end face of the gap between both bodies and both sides of the key when the key is inserted into the gap of the core body, as seen from the cylinder axis direction. FIG. 6 is a partial cross-sectional explanatory view of the method for removing the core from the side run roll winding shown in FIG. 5; FIG. 7 is a conventional key-embedding winding. Perspective view of the core, No. 8
The figure is an explanatory diagram of a state in which a sheet-like material is wound around the core of FIG. 7. In the drawings 1...Shaft 2...Conventional side run core 3...Product roll winding 4...Side run roll winding 5...Base 6...Abutting tool 7 ... Hammer 8 ... Core body 8a of the conventional key-incorporated core...
- Body gap end face 9... Gap 10 in the core body of the conventional key-incorporated core
... Conventional key 10a ... Side surface 11 of conventional key ... Core body 11a of the winding core according to the present invention...
- Body gap end face 12... Gap 13 of the core body of the core according to the present invention.
. . . Core key 13a according to the present invention. . . Side surface 0 of the key. . . Cylindrical axis O'. . . Intersection line of the surfaces. ...Key pressing direction in the present invention + 5 Figure Patent applicant Sanyo Kokusaku Pulp Co., Ltd.

Claims (1)

[Scope of Claims] 1. A core body (11) in which a gap (12) of a predetermined width is formed in the wall of a cylindrical body parallel to the cylinder axis (O) and over its entire length, and the gap ( 12) and a key (13) that is fitted into the core to complete the winding core shape, and two body gap end faces (11a), (11a) that face each other across the gap (12) when the key (13) is fitted. In the side-run winding core in which both sides (13a) and (13a) of the key (13) are in contact with each other, the key (13) is attached to the core body (11).
) is inserted into the two main body gap end faces (11
a), (11a) and both sides (13a) of the key (13)
, (13a) are directed outward from the cylinder so as to intersect on the cylinder axis (O) of the winding core body (11) or between the cylinder axis (O) and the position of the gap (12) when each surface is extended. A winding core for side-run winding of sheet-like materials, characterized by being formed in a tapered shape that widens at the end. 2. A friction surface sufficient to hold the key (13) when the key (13) is inserted into the core body (11) is formed on the side surface of the core body (11) and/or the key (13). The winding core for winding up a side-run sheet-like article according to claim 1. 3. When the winding core body (11) is in its natural state, it has a smaller diameter shape than when the key (13) is inserted into the gap (12), and when the key (13) is inserted into the gap (12), The winding core for side-run winding of a sheet-like material according to claim 1 or 2, which generates elasticity that pinches the key (13). 4. A gap (12) in the core body (11) of the core for side-run winding of a sheet-like material according to any one of claims 1 to 3.
After inserting the key (13) into the core and completing the winding core, set the thing attached to the shaft (1) in the winder and wind up the side run, and then pull out the shaft (1) from the winding core. A winding for side-run winding of a sheet-like material, characterized in that after the key (13) is hammered out with a hammer (7), the core body (11) is extracted or punched out from the winding body of the side-run roll winding (4). How to use the core.