JP2789314B2 - Method and apparatus for manufacturing toilet paper roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a coreless toilet paper roll.

[0002]

2. Description of the Related Art 2 having a tapered surface oblique to an axis.
After winding a paper sheet directly on a winding shaft composed of a half shaft portion of a book without using a paper core tube to form a long roll paper, the winding shaft is divided into two and the roll paper is removed. Japanese Patent Publication No. 55-326 discloses a method of manufacturing a toilet paper roll in which an adhesive is adhered to a hole of a core.
No. 18 is known. The conventional method of manufacturing toilet paper described above involves directly feeding paper without using a paper core tube onto a winding shaft configured so that two half shaft portions having a tapered surface inclined with respect to the axis can be divided into two. After winding and forming a roll, each half-shaft portion is largely moved to at least the length of the paper roll and largely separated while being divided, thereby removing the paper roll from the winding shaft and extracting the winding shaft. The adhesive is adhered to the inner surface of the core hole through a long rod having a sponge sphere containing an adhesive at the tip of the core hole formed by the method, and is cured.

[0003]

However, in the above-mentioned conventional manufacturing method, when the paper roll wound on the winding shaft is removed, the half-shaft portion of the winding shaft which can be divided is at least placed on the paper roll. The removal operation is extremely troublesome because it must be moved to a length greater than the length, and cannot be automated mechanically. Also, in general, the manufacturing apparatus has a long paper sheet flow direction and the axial direction of the take-up shaft is narrow, but in the above-described conventional apparatus, the left and right sides of the take-up shaft are individually longer than the length of the paper roll. Requires a very large space inside the workplace. Therefore, there is a need for a method and apparatus for manufacturing a toilet paper roll that does not require wasted space, is extremely simple, and can be automated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has been proposed in order to meet the demands of the related art. The present invention is directed to an end portion between a first unit shaft and a second unit shaft. In addition to providing a taper part oblique to the axis, a guide groove and a guide pin are provided in the taper part of both unit shafts,
By inserting the guide pin of the other unit shaft into the guide groove of the tapered portion of one unit shaft, the tapered portions of both unit shafts are overlapped, and the most extended state where both unit shafts are stretched and thinned most, The paper sheet is wound up in the most reduced state of the winding shaft, which can be restricted by the guide groove and the guide pin, and the paper sheet is wound up by a certain length. The method for manufacturing a toilet paper roll, wherein the wound paper sheet roll is removed from the winding shaft while the rotation of the winding shaft is stopped and converted to the most extended state, and the manufacturing method is performed. The present invention relates to a manufacturing apparatus.

[0005]

When the take-up shaft is in the most contracted state, the paper sheet is taken up as a roll, and in that state, one or both unit axes of the take-up shaft are moved in a restricted range to bring the paper sheet into the most extended state. Since it is converted and becomes thinner, the wound paper roll can be easily removed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

[0007] The toilet paper roll manufacturing apparatus of the present invention has a winding shaft 1. The winding shaft 1 is composed of a first unit shaft 11 and a second unit shaft 21. At one end of each unit shaft, tapered portions 12, 22 which are oblique to the axis are formed. And each of the tapered portions 12,
22 has a flat surface.

[0010] Guide pins 14 and 24 provided with heads 13 and 23 are respectively provided on the tapered portions 12 and 22 of both unit shafts 11 and 21 at positions located on the tip side of the tapered portions. Position it on the base end side of the tapered part,
The guide grooves 15 and 25 having a length along the axial direction are formed.

The guide grooves 15 and 25 are stepped with different widths, and the sides facing the tapered portions become narrow portions 16 and 26 so that the guide pins 14 and 24 can be inserted and moved, and the unit shaft is formed. The sides facing the outer surface of the head are the wide portions 17, 27, and the heads 13, 23 can be accommodated and moved.

Therefore, the tapered portions 12 and 22 of the two unit shafts 11 and 21 are superimposed in surface contact, and one of the unit shafts
The head 23 (13) is housed in the wide portion 17 (27) by passing the guide pin 24 (14) of the other unit shaft through the guide groove 15 (25) of the first (21), and the tapered portion 22 (1) is housed.
When fixed to 2), both unit shafts 11 and 21 are connected,
It can move within the range of the length of each guide groove 15, 25.

The winding shaft 1 constructed in this manner has two unit shafts 11, 21 by both tapered portions 12, 22.
Is restricted to the most contracted and thickest contracted state, and the most expanded and thinned most extended state. In addition, since the most contracted state and the most extended state are locked by the guide groove and the guide pin, the conversion between the two states can be automatically operated mechanically by a solenoid, a plunger, a cam mechanism, or the like.

Therefore, the paper sheet is gradually taken up in a state where the take-up shaft is thick and in the minimum contraction state, and the paper sheet is taken up by a predetermined length to form a paper roll. By moving one or both of the unit shafts only within a restricted range, the winding shaft is converted into a thinned maximum extension state from a minimum reduction state. Therefore, the take-up shaft can be easily removed from the paper roll, and the removed take-up shaft can be manually or mechanically converted to the minimum contraction state and the paper sheet can be taken up again.

Although the present invention has been described based on the embodiments in the drawings, the present invention can be implemented in any manner without changing the configuration described in the claims. In the above-described embodiment, the case where the paper sheet is directly wound on the winding shaft has been described.However, the winding shaft and the paper core are integrally formed in the thickest and most reduced state by attaching the paper core to the winding shaft. When the paper sheet is wound up and the paper sheet is wound up on the paper core by a certain length, the core may be converted into a narrowest stretched state to extract the paper core.

[0014]

In summary, according to the present invention, the first unit shaft and the second unit shaft are provided with a tapered portion at an end with respect to the axis, and a guide is provided at the tapered portion of both unit shafts. A groove and a guide pin are provided, and the taper portion of both unit shafts is superimposed by inserting the guide pin of the other unit shaft into the guide groove of the tapered portion of one unit shaft, so that both unit shafts become the most elongated and thin. The paper sheet is wound up in the most reduced state of the winding shaft, which can regulate the maximum stretched state and the most contracted state, which is the most contracted and thickened, within the range of the guide groove and the guide pin, and keeps the paper sheet constant. A toilet paper characterized in that the wound paper sheet roll is removed from the winding shaft while the rotation of the winding shaft is stopped in a state where the winding shaft has been wound for a long time and the state is changed to a narrowest extended state. METHOD FOR PRODUCING Roru those, and a manufacturing apparatus.

Therefore, when converting between the most contracted state and the most extended state, the take-up shaft moves only by a small length, so that no wasted space is required in the factory, and it is simple. Conversion is possible with a simple operation. Moreover, since the conversion state between the most contracted state and the most extended state is fixed, it can be automatically operated by using a solenoid, a plunger, a cam mechanism, etc. It has a very high practical value.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a part of a winding shaft according to an embodiment of the present invention.

FIG. 2 is a plan view of a part in which the winding shaft is in a thickest and most reduced state.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view of the winding shaft in a narrowest extended state.

FIG. 5 is a vertical cross-sectional view of the winding shaft in a narrowest extended state.

FIG. 6 is a sectional view taken along line BB of FIG. 3;

FIG. 7 is a cross-sectional view taken along line CC of FIG. 4;

FIG. 8 is a cross-sectional view taken along line DD of FIG. 4;

FIG. 9 is a cross-sectional view taken along line EE of FIG. 4;

FIG. 10 is a sectional view taken along line FF of FIG. 4;

FIG. 11 is a sectional view taken along line GG of FIG. 4;

[Explanation of symbols]

 1 Winding shaft 11, 21 Unit shaft 12, 22 Tapered portion 13, 23 Head 14, 24 Guide pin 15, 25 Guide groove

Claims (2)

(57) [Claims] 1. An end portion between a first unit shaft and a second unit shaft is provided with a tapered portion oblique to an axis, and a guide groove and a guide pin are provided in a tapered portion of both unit shafts. By inserting the guide pin of the other unit shaft into the guide groove of the tapered portion of one unit shaft, the tapered portions of both unit shafts are overlapped, and the most elongated state where both unit shafts are stretched and thinned most, The paper sheet is wound up in the minimum shrinking state of the winding shaft, which can regulate the contracted and thickest minimum shrinkage in the range between the guide groove and the guide pin, and the paper sheet is wound up by a certain length. A method of manufacturing a toilet paper roll, wherein the wound paper sheet roll is detached from the winding shaft while the rotation of the winding shaft is stopped to convert the wound paper sheet roll into a narrowest extended state. 2. An end portion between the first unit shaft and the second unit shaft is provided with a tapered portion oblique to the axis, and a guide groove and a guide pin are provided on the tapered portions of both unit shafts. By inserting the guide pin of the other unit shaft into the guide groove of the tapered portion of one unit shaft, the tapered portions of both unit shafts are overlapped, and the most elongated state where both unit shafts are stretched and thinned most, An apparatus for manufacturing a toilet paper roll, characterized in that the maximum contraction state, which is shrunk to be thick, can be regulated by a guide groove and a guide pin.