JP2007284177A - Non-core sheet roll and manufacturing method for non-core sheet roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-core sheet roll which, although it is a non-core and a form as a roll is retained, can be turned into a sheet by small force in order to reduce waste as much as possible. <P>SOLUTION: In the non-core sheet roll comprising a thermoplastic polymer, the sheets are temporarily adhered to each other at both ends in a width direction of the sheet roll to retain the form as the roll. The non-core sheet roll and the manufacturing method for the non-core sheet roll are preferably constituted such that the temporary adhesion is performed in a limited area at both ends of the sheet roll and adhesion strength is lower than strength of the sheet. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a coreless sheet scroll and a method for manufacturing the coreless sheet scroll, and more particularly to a coreless sheet scroll used for maintenance management of piping in a business site using a radioactive substance such as a nuclear power plant, and a coreless sheet scroll. It is related with the manufacturing method.

In maintenance management of pipes used in power plants and chemical plants, it is widely practiced to wind a curing sheet around the pipes. On the other hand, in establishments that use radioactive materials such as nuclear power plants, in order to reduce waste after use as much as possible, a coreless sheet scroll that does not use a core of a curing sheet scroll is required.

For uncore sheets,
Continuous sheet roll wound product using wrapping paper at the beginning of winding (Patent Document 1), coreless dry nonwoven fabric roll (Patent Document 2) with moderate rigidity using glue, coreless sheet roll A winding device (Patent Document 3) that uses a pair of half-winding cores that are split into two at the beginning of the winding, and a technique (Patent Document 4) related to removal of the wound sheet are disclosed.
However, the coreless sheet roll is generally difficult to maintain its shape and often uses a paste or the like, and there is still room for improvement.

JP 2002-265102 A Japanese Patent Laid-Open No. 2002- 211809 JP-A-6-144712 JP 2004-26421 A

Therefore, the object of the present invention is to
In order to reduce waste as much as possible, the present invention provides a coreless sheet roll that is coreless and retains its form as a roll, but can be turned into a sheet with a small force.

That is, the present invention
(1) A coreless sheet roll made of a thermoplastic polymer, wherein the sheets are temporarily bonded to each other at both ends in the width direction of the coreless sheet roll to maintain the form as a roll. Core sheet scroll,
(2) In a method for producing a coreless sheet roll made of a thermoplastic polymer, the sheets are temporarily bonded to each other at both ends in the width direction of the sheet roll to maintain the form as a roll. Manufacturing method of sheet roll,
(3) In the coreless sheet roll of (1), the temporary adhesion is characterized in that the form is retained as a roll, but the bond strength is lower than the strength of the sheet.
(4) In the method for producing a coreless sheet roll according to (2), the process is performed by frictional heat generated when the coreless sheet roll is cut with a saw.
(5) In the method for producing a coreless sheet roll according to (2), both ends of the coreless sheet roll are brought into contact with a heated object and temporarily bonded at both ends.
(6) In the method for manufacturing a coreless sheet roll according to any one of (2), (4), and (5), the winding start end of the sheet has one axis connected to both ends in the width direction, and The two shafts that exist only at one end each start to be wound in a sandwiched state. After the end of winding, the shaft that exists only at the end is first pulled out, and then the shaft that is connected to both ends in the width direction. It is characterized by being drawn and temporarily bonded to a coreless sheet roll.

The present invention is a coreless sheet roll. No-core means a state in which the core for winding that is not used as a sheet is not used at the center of the sheet scroll to facilitate manufacture of the sheet scroll or stabilize the form of the sheet scroll. Say. In the coreless sheet, the core part is not discarded as waste after the sheet is used. In other words, the amount of radioactive waste can be reduced in places that handle radioactive substances such as nuclear power plants.

Further, in the present invention, the scroll means an object obtained by winding a tape-like sheet in a spiral shape. A sheet refers to a thin plate-like object. Specifically, a film, a nonwoven fabric, a tape fabric, etc. can be mentioned. In the present invention, a coreless sheet roll made of a thermoplastic polymer material is preferably used. This is because temporary bonding can be easily performed at both ends of the coreless sheet roll.

  Thermoplastic means a substance that has plasticity in a heated state but loses plasticity when cooled. Examples of the thermoplastic polymer include polyester, polyamide, polyolefin, polystyrene, and methacrylic resin. The thermoplastic polymer may be imparted with flame retardancy, and conventionally known triphenyl phosphate, triphenyl phosphite, or the like can be used.

In this invention, in order to hold | maintain the form as a scroll, it is necessary to temporarily adhere at the both ends of the width direction of a coreless sheet roll. Here, the temporary adhesion is bonded to such an extent that the form as a scroll can be maintained, but when a force is applied, the sheet is bonded to such an extent that the temporary bonded portion can be pulled away without being cut. State. Specifically, it is in a state of being locally joined at both ends in the width direction of the coreless sheet roll.

In the coreless sheet roll of the present invention, in order to maintain the shape of the end of the coreless sheet roll and the central part, a tape coated with a single-sided adhesive is used to connect the end of the coreless sheet roll and the center of the coreless sheet roll It can also be bonded to the surface in advance or in addition.

  The present invention is a coreless sheet roll and a method for producing a coreless sheet roll, and is used particularly for curing. Curing here refers to the protection of construction sites, specifically wound around a pipe and used to prevent the surface of the pipe from being damaged.

In the present invention, as a method of performing temporary bonding, if a coreless sheet roll prepared in a wide width is cut using a circular saw or the like, temporary bonding on the cut surface can be performed by frictional heat generated at the time of cutting. it can. Alternatively, temporary bonding can be performed by bringing a heated object into contact with the cut surface.

In order to produce the coreless sheet roll of the present invention, one end of the sheet longitudinal method is sandwiched between two bars having a circular cross section, or two bars having a cross section of a cross section. Roll up the sheet mechanically. Next, the other end of the sheet is fixed with a film coated with an adhesive on one side. Open the space between two sandwiched rods or two rods that are split, and pull out the two rods one by one to obtain a wide coreless sheet roll.

In order to prevent the coreless sheet roll from being deformed,
The winding start end of the sheet is preferably started to be wound in a state of being sandwiched by one shaft connected to both ends in the width direction and two shafts existing only at one end in the width direction. After completion of the removal, it is preferable that a shaft that is present only at the end is first extracted, and then a single shaft connected to both ends in the width direction is extracted and temporarily bonded.

  In order to obtain a coreless sheet having a desired width, a wide coreless sheet roll is cut using a circular circular saw or the like. Temporary adhesion between sheets is performed due to frictional heat generated at the time of cutting.

FIG. 1 is a perspective view of a mechanical device for producing a coreless sheet roll according to the present invention. In FIG. 1, the installation base includes a base 11, a base leg 12, and an intermediate bearing base 13. A bearing unit (moving side) 2 includes a chuck 21, a power shaft 22, and a chuck shaft 23. Reference numeral 3 denotes a bearing unit (power side), which includes a chuck 31, a power shaft 32, and a chuck shaft 33. 4 is an intermediate bearing unit. Reference numeral 5 denotes a winding shaft unit. 6 is a power transmission shaft.

FIG. 2 is a detailed drawing of the take-up shaft unit, and in FIG. 2, a fixing metal 51, an axis A52, an axis B53, and a set screw 54 are shown. The shaft A52 and the shaft B53 are connected to the bearing unit moving side and the bearing unit.
FIG. 3 is a front view of one shaft 52 connected to both ends in the width direction and the shafts B53 and C531 existing only at one end in the width direction.
FIG. 4 shows a state during winding.

To set the winding shaft shown in FIG. 3, the fixing bracket 51 is inserted into the chuck 21 and fixed.
At the time of winding, for example, the sheet is sandwiched between the shaft A52, the shaft B53, or the shaft C531 illustrated in FIG. 3, and is fixed and sandwiched using the set screw 54. Next, it is attached to the bearing unit 2 shown in FIG.

When the winding is completed, first, the fixing bracket 51 is removed from the chuck 21, and the end of the sheet roll is fixed using an adhesive tape. Next, the set screw 54 is loosened, the shaft B and the shaft C are pulled out at both ends while the fixing bracket 51 is attached, and then the shaft A is released. By pulling the shaft B and the shaft C in the opposite directions, it is possible to prevent the coreless scroll from being deformed. Next, using a saw or the like, the sheet is cut into a desired width, temporarily bonded at the cut portion, and the adhesive tape is removed.

FIG. 5 is an end perspective view when the end is cut with a saw after winding. The part where the sheet layer 83 overlaps has a temporary adhesion part 81 and is partially joined, and the part where the sheet layer 83 is separated is an unadhered part 82. FIG. 6 is a cross-sectional view of the end portion cut with a saw after winding. Adhesion is performed at the end portion of the sheet layer 83. Since the adhesive strength of the temporary bonding portion is weak, the form as a scroll is maintained, but it can be easily peeled off during use.

According to the present invention, a coreless sheet roll is obtained. For this reason, (1) it is possible to reduce the amount of radioactive waste because it is not necessary to discard the core of the sheet scroll in facilities that handle radioactive materials such as nuclear power plants.
(2) Since the coreless sheet roll is in the form of a roll, it is not bulky and easy to handle.
(3) The method of creating the coreless sheet roll is relatively simple, and the mechanical device for creation is simple and economical.

It is a perspective view of the machine apparatus for coreless sheet roll preparation by this invention. It is a front view of the winding shaft unit by this invention. It is a front view of the winding shaft by this invention. The winding is in progress. It is an edge part perspective view of a coreless sheet roll. It is edge part sectional drawing of a coreless sheet roll

Explanation of symbols

11 Pedestal 12 Pedestal leg 13 Intermediate bearing pedestal 2 Bearing unit (moving side)
21 Chuck 22 Power shaft 33 Chuck shaft 3 Bearing unit (power side)
31 Chuck 32 Power shaft 33 Chuck shaft 4 Intermediate bearing unit 5 Take-up shaft 51 Fixing bracket 52 Axis A
53 Axis B
531 Axis C
54 Set screw 6 Power transmission shaft 7 Driving unit 8 Coreless sheet roll 81 Temporary bonding unit 82 Non-bonding unit 83 Sheet layer 9 Original roll

Claims (6)

  A coreless sheet roll made of a thermoplastic polymer, wherein the sheets are temporarily bonded to each other at both ends in the width direction of the coreless sheet roll to maintain the form as a roll. .   In a method for producing a coreless sheet roll made of a thermoplastic polymer, a sheet of the coreless sheet roll is characterized in that, at both ends in the width direction of the sheet roll, the sheets are temporarily bonded to each other to maintain the form as a roll. Production method. 2. The coreless sheet roll according to claim 1, wherein the temporary adhesion has a form which is maintained as a roll but has an adhesive strength lower than that of the sheet. The method for producing a coreless sheet roll according to claim 2, wherein the process is performed by frictional heat generated when the coreless sheet roll is cut with a saw. 3. The method for producing a coreless sheet roll according to claim 2, wherein both ends of the coreless sheet roll are brought into contact with a heated object and temporarily bonded at both ends. 6. The method for manufacturing a coreless sheet roll according to claim 2, wherein the sheet winding start end is present only on one shaft connected to both ends in the width direction and one end in the width direction. The two shafts begin to be wound in a sandwiched state, and after winding is finished, first the shaft that exists only at the end is pulled out, then the shaft that is continuous at both ends in the width direction is pulled out, A method for producing a coreless sheet roll, characterized by being prepared by temporary adhesion.

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