JP2000249194A - Tape cylindrical structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply to a wide utilization range and a severe usage by winding adjoining tapes into a spiral shape with the tapes abutted to each other, joining the edges by sewing to be formed into a cylindrical structure, and sewing the width direction of the cylindrical structure. SOLUTION: A woven fabric and an unwoven fabric born to be sewn is better for making a tape 1, the woven fabric is preferable in particular, the width is, for example, 5-100 mm in a belt field 1 m so as to prevent the lowering of the productivity and meandering in winding it into the spiral shape. The prescribed width of tape 1 is abutted to an adjoining tape in their edges so as to be wound into a spiral shape and the interval between the edges are joined by sewing using a sewing thread 2 so that a cylindrical structure is formed. The formed cylindrical structure is sewn in the width direction by a sewing thread 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular structure (for example, a press-contact belt for corrugating) manufactured using a tape.

[0002]

2. Description of the Related Art When manufacturing corrugated cardboard by corrugating, the core is fed to a pair of corrugated step rolls, and the corrugated board is processed. The corrugated portion of the corrugated core is glued and the liner is applied. A method of bonding by pressing and pressing with a press roll is adopted (press roll method).

Recently, a method in which a belt is pressed into contact with a step roll on the side to be pasted, and a liner is fed between the step roll and the belt from above a stepped core to bond them together. Is attracting attention (pressure belt system).

Japanese Patent Application Laid-Open No. 7-60877 discloses a belt mainly used in a pressure contact belt system.
A wide belt having a layer structure of “skin canvas / heat-resistant elastomer layer / canvas core” is shown.

Although there is no description about corrugating, for example, Japanese Unexamined Utility Model Publication No. 6-63536 discloses a conveyor belt used in a paper feeding process.
Heat-resistant fiber base material is impregnated with fluororesin, dried and sintered, and a reinforcing layer formed on this reinforcing layer is knitted with heat-resistant fibers. A heat-resistant laminated conveyor belt comprising a wear-resistant layer provided with a property is shown.

As a loop-shaped belt manufactured using a tape, Japanese Patent Application Laid-Open No. 9-11689 discloses a long nip press belt for dewatering a fiber web. The belt includes a base fabric having a spirally wound band structure, the band structure having a width smaller than the width of the base fabric, and the base fabric having a spirally wound band structure. A plurality of non-overlapping turns, whereby the base fabric has the form of an endless loop having an inner surface, an outer surface, a length direction and a width direction, further comprising a coating of a polymeric resin on at least the inner surface of the base fabric; The coating is one that is impregnated into the substrate to provide impermeability to liquids, and that the coating is smooth and gives the belt a uniform thickness. Examples of the band-like structure include a band made of a woven fabric, a band made of a nonwoven fabric, and a band of a polymer film. In the case of a woven fabric, polyester and polyamide are used as the warp and the weft.

[0007]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 9-111 is disclosed.
Although the belt of the '689 publication is suitable for use in long nip presses, the use of ordinary polyester or polyamide makes it completely usable for applications such as corrugated press belts used in high-temperature environments. Absent. Also, at this time, even if a heat-resistant yarn is used instead of ordinary polyester or polyamide, it is used for high-speed running,
Extremely severe conditions, such as an extremely large tensile force, large vibrations, irregularities in the object to be pressed, corrugation in the width direction of the belt, and easy adhesion of glue used for lamination The above-mentioned belt cannot cope with the use of the pressure contact belt for corrugating used in the above.

The above-mentioned Japanese Patent Application Laid-Open No. Hei 9-111689.
The belt disclosed in Japanese Patent Application Publication No. 2003-115686 cannot be used not only as a belt used under severe conditions such as a pressure contact belt for corrugating, but also has insufficient strength when applied to various belts used under milder conditions. Often.

Even if the belt has a complicated structure as described in JP-A-7-60877 and JP-A-6-63536, the life of the belt when it is used for a press-contact belt for corrugating is as follows. The disadvantage is that replacements have to be made less often than expected. In the belts of these publications, weaving is performed using heat-resistant yarns for the purpose of use, but when obtaining a seamless woven fabric with a wide belt, it is necessary to keep the circumference strictly constant over the entire width. However, in the case of a woven fabric using a heat-resistant yarn, the circumference cannot be corrected even by heat setting after weaving, so that there is a problem that meandering is likely to occur during high-speed running.

Under such a background, the present invention provides a tape-shaped tubular structure which can be used in a wide range of applications and can be applied to severe use such as a pressure contact belt for corrugating. It is intended to provide.

[0011]

According to the present invention, there is provided a tape-shaped tubular structure in which a tape having a predetermined width is spirally wound so that edges of adjacent tapes abut each other, and an edge of an adjacent tape is formed. The space is joined by sewing to form a tubular structure, and the tubular structure has a configuration in which the width direction is also sewn.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

As the tape, a tape that can withstand sewing, such as a woven fabric or a nonwoven fabric, particularly a woven fabric is preferable. The width of the tape depends on the width of the target tubular structure, such as a belt.
For example, when the belt width is 1 m, for example, 5 to 10
It is often 0 mm (especially 10 to 50 mm). If the tape width is too narrow compared to the belt width, it is disadvantageous in terms of productivity.If the tape width is too wide, it becomes noticeable that the direction of the tape becomes oblique when wound into a spiral shape, causing meandering. There is a risk.

When the tape is a woven fabric, the woven structure of the woven fabric is usually a plain weave structure, but depending on the case, an oblique weave (twill) structure, a satin weave structure, or a change weave thereof It can also be an organization.

When the tape is a woven fabric, the warp and the weft constituting the woven fabric are heat-resistant and high-strength fiber yarns such as metal fibers (stainless steel fibers, shape memory alloys, etc.), ceramic fibers, A thread made of glass fiber, carbon fiber, aramid fiber, polyetheretherketone fiber, polyamideimide fiber, polyimide fiber, polybenzimidazole fiber, liquid crystal polyester fiber, or the like can be used. Of these, aramid fibers are particularly important, and polyetheretherketone fibers and stainless steel fibers are also important. The heat-resistant and high-strength fiber yarn is preferably a monofilament or a multifilament made of a long fiber. In the case of a monofilament, a plurality of filaments can be used by aligning or twisting. A slit yarn obtained by slitting a film can also be used. In addition, a fiber obtained by cutting a filament into an appropriate length and twisting the filament to impart fluff, such as a woolen yarn, is also preferably used. At least one of the warp yarn and the weft yarn may be one in which the S-twisted yarn and the Z-burning yarn are arranged in a well-balanced manner.

The warp and weft constituting the woven fabric may be any of ordinary synthetic fiber yarns (polyester fiber yarn, nylon fiber yarn, acrylic fiber yarn, polyvinyl alcohol fiber yarn, polyurethane fiber yarn, etc.) according to the use of the tubular structure. ), Semi-synthetic fiber yarns, natural fiber yarns and the like.

In the present invention, first, a tape of a predetermined width is spirally wound so that edges of adjacent tapes abut each other, and the edges of adjacent tapes are joined by sewing to form a cylindrical structure. Forming things.

The winding and sewing at this time are preferably performed as follows.
Two rolls are arranged in parallel at an appropriate distance, and a first sewing machine is arranged between the two rolls. The tape is fed out while rotating both rolls in the same direction, and a spiral is formed between the two rolls. This is achieved by sewing between the edges of the adjacent tapes with the first sewing machine while winding. At this time, the first sewing machine is retracted in accordance with the winding of the tape. Also, as in Examples 4 and 5 described below,
Two tape supply reels and two first sewing machines for supplying tape are installed, and after one of the tapes runs out, the other tape is unwound and sewing between the tape edges is performed. It is also possible to perform sewing between tape edges while feeding out both tapes while retracting one sewing machine in a direction away from each other.

As the first sewing machine described above, a staggered sewing machine capable of performing two-point zigzag stitching, four-point zigzag stitching, and the like,
A sewing machine capable of bassoon sewing is suitably used, and an overlock sewing machine or the like is sometimes used.

After the spiral structure and the joining by the sewing between the edges of the adjacent tapes are performed to form a cylindrical structure, the structure is sewn in the width direction by the second sewing machine. The width direction sewing interval at this time is set appropriately from rough to dense according to the use of the structure. The sewing in the width direction can be performed slightly obliquely or crosswise.

As the second sewing machine at the time of the width direction sewing, various sewing machines capable of forming a sewing pattern such as linear sewing, staggered sewing, scalloped sewing, blind stitch sewing, and bassoon sewing are used.

A plurality of tubular woven fabrics after sewing between edges or tubular structures after widthwise sewing can be concentrically overlapped with each other to further perform widthwise sewing or bonding.

The cylindrical structure obtained as described above is processed at an appropriate stage with a resin using various resins such as polyurethane, polyester, epoxy resin, silicone resin, fluorine resin, and other treatments. It can be performed.

An example of resin processing will be described with reference to the case of impregnation or formation of a coating layer with a fluorine-based resin.

When providing an impregnated layer of a fluorine-based resin on a tubular structure such as a belt, an operation of impregnating the tubular structure with a dispersion of polytetrafluoroethylene (PTFE), followed by drying and sintering is performed. May be repeated several times. In this dispersion processing of PTFE, if a thick coating is applied at one time, a mud crack is generated by drying. Therefore, the adhesion amount per application is limited to about 20 μm or less in the thickness of the resin after baking, and the immersion-drying-firing is 5 to 10 μm. It is desirable to repeat the process a number of times to obtain a desired thickness. The firing temperature is often about 350 to 400 ° C.

When a coating layer made of a fluororesin is provided on a tubular structure such as a belt, the PF is placed on the tubular structure from above.
A, FEP, PTFE or other fluorinated resin or a heat-resistant composition containing a large amount of powder of such fluorinated resin is melt-coated, or PFA, FEP or other fluorinated resin film or semi-melted fluorinated resin film A method of coating and thermocompression bonding is employed. In addition, a method in which a raw PTFE film is coated and then baked at an appropriate stage at a temperature of about 350 to 400 ° C. can be adopted.

Further, as a heat-resistant and high-strength fiber yarn when weaving a woven fabric as a tape, a covering yarn obtained by covering with a fluorine resin yarn (especially a film yarn) and a fluorine resin yarn are twisted. If you use a twisted yarn, or use a heat-resistant high-strength fiber yarn together with a fluorine resin yarn,
After weaving, the heat treatment above the melting point of the fluororesin causes the fluororesin thread to flow and the vertical and horizontal structures that constitute the structure to be fused and integrated. Layers can be formed.

If necessary, other layers can be added to the cylindrical structure thus obtained. For example, a layer such as a fluororesin film layer or a polyurethane resin layer can be provided at an appropriate stage on the back surface of the tubular structure. Further, at an appropriate stage, a curable resin such as a polyimide resin prepolymer may be impregnated from the back surface side of the tubular structure, and cured by curing.

The tape-shaped tubular structure of the present invention is used as a pressure contact belt for pressing a sheet to be processed against a step roll during corrugating, that is, as a belt for bonding a liner over a stepped core. Particularly useful.
The dimensions of the pressure contact belt at this time vary depending on the dimensions of the corrugator step rolls and the space between the rolls. For example, the width is about 1600 to 3000 mm and the circumference is 2000 mm.
Often more than the degree.

The tape-shaped tubular structure of the present invention can be used as a belt or a tubular material for various uses, such as a transport belt, a transport belt for baking purpose, and a protective cover for roll coating.

<Function> The tape-made tubular structure of the present invention
Since the tape winding method is adopted, the circumference and width can be set freely. In addition, because the circumference can be precisely constant over the width direction of the tubular structure, it is difficult to correct the circumference by heat setting the warp and weft used for weaving the tape when the tape is a woven cloth. Even when a heat-resistant yarn is used, a tubular structure with good dimensional accuracy can be obtained.

[0032]

The present invention will be further described with reference to the following examples.

Embodiment 1 FIG. 1 is a plan view showing an example of an apparatus for manufacturing a tape-made tubular structure according to the present invention. FIG. 2 is a front view of the manufacturing apparatus of FIG. FIG. 3 is an explanatory view showing an example of a tubular structure at a stage after sewing between edges. FIG. 4 is an explanatory view showing an example of the tape-shaped tubular structure of the present invention after sewing in the width direction. FIG.
In (4) and (4), (A) shows a plan view and (B) shows a side view.

In FIG. 1, (11) and (11) are rolls arranged in parallel with each other at a predetermined interval. Roll (1
1) and (11) are supported so that the inclination can be changed according to the width of the tape (1) to be supplied.

(12) is a first sewing machine arranged between the two rolls (11) and (11). The first sewing machine (12) is movable in the axial direction of the roll (11) along the sewing machine moving rail (13).

A tape supply reel (14) is movable in the axial direction of the roll (11) along a reel moving rail (15). (17) is a machine base.

When the tape (1) is unwound from the tape supply reel (14) while rotating the rolls (11) and (11) in the same direction, the tape (1) is rotated by the two rolls (11) and (11). Since the adjacent tapes are spirally wound so that the edges of the adjacent tapes abut each other, the first sewing machine (12) is moved backward along the sewing machine moving rail (13), and the edge of the adjacent tape is moved by the sewing machine ( Sewing according to 12). In addition, tape supply reel
The person (14) also moves along the reel moving rail (15).

As a result, a tubular structure (belt) as shown in FIG. 3 is obtained, and sewing is also performed in the width direction of the belt as shown in FIG. (2) is a sewing thread between the tape edges, and (3) is a sewing thread in the belt width direction. Thereby, the target tape-shaped tubular structure is obtained.

Aramid fiber multifilament yarn of 7000 denier as an example of a heat-resistant high-strength fiber yarn as a warp yarn, and 2 as an example of a heat-resistant high-strength fiber yarn as a weft yarn
A thin (for example, 10 mm wide) woven fabric woven with 000 denier aramid fiber multifilament yarn is used as the tape (1), and as the thread between the tape edges (2) and the belt width direction sewing thread (3). Using a sewing thread made of a multi-filament aramid fiber of 1000 denier, a tape-shaped tubular structure (tubular belt) was obtained as described above.

Next, the operation of impregnating the surface of the cylindrical belt with a dispersion of polytetrafluoroethylene (PTFE), followed by drying and firing was repeated 7 to 8 times. The firing temperature was 360-380 ° C.

The tubular belt thus obtained is
The circumference is precisely constant over the entire width of the belt, and is used as a pressure contact belt to press the sheet to be processed against the step roll during corrugating (to bond the liner over the stepped core). When a corrugated cardboard was manufactured by using the belt as a pressure contact belt, meandering hardly occurred, and troubles such as cutting, breakage, and wrinkling of the belt did not easily occur, and smooth pressure contact could be performed. This pressure contact belt was extremely tough and had a long service life.

Example 2 A narrow woven fabric woven using polyester multifilament yarns as warps and wefts was used as the tape (1), and a sewing thread between the tape edges (2) and a sewing thread in the width direction of the belt (3) As a result, a loop-shaped structure (cylindrical structure) was obtained in the same manner as above using a sewing thread made of a polyester fiber thread. This structure can be used, for example, as a protective tube to cover an air roll formed into a roll by blowing air.

Embodiment 3 FIG. 5 is a plan view showing another example of the apparatus for manufacturing a tape-made tubular structure according to the present invention. FIG. 6 is a front view of the manufacturing apparatus of FIG. In FIGS. 5 and 6, (16) denotes a second sewing machine for performing sewing in the width direction.

The winding of the tape (1), sewing between the edges of the tape (1), and sewing in the belt width direction are performed in the same manner as in the first embodiment. When performing sewing with the second sewing machine (16), it is necessary to use a separable sewing machine with a separated base or a sewing machine with an extremely deep pocket. FIG. 6 shows a roll (11).
Is shown, but two rolls (11) are usually sufficient.

Embodiment 4 FIG. 7 is a plan view showing still another example of the apparatus for producing a tape-made tubular structure according to the present invention. FIG. 8 is a front view of the manufacturing apparatus of FIG. 7 and 8, reference numeral 16 denotes a second sewing machine for performing sewing in the width direction.

The winding of the tape (1), the sewing between the edges of the tape (1), and the sewing in the belt width direction are basically performed in the same manner as in the first embodiment. (14) and two first sewing machines (12), and after the tape (1) on one tape supply reel (14) runs out, the tape (1) is removed from the other tape supply reel (14). The tape (1) can be sewn between the edges while being unreeled. This method can also be applied to a case in which belts are divided into zones using different colors or different materials as the tape (1).

Embodiment 5 FIG. 9 is a plan view showing another example of the apparatus for manufacturing a tape-made tubular structure according to the present invention. FIG. 10 is a front view of the manufacturing apparatus of FIG. 9 to 10, reference numeral (16) denotes a second sewing machine for performing sewing in the width direction.

The winding of the tape (1), the sewing between the edges of the tape (1), and the sewing in the width direction of the belt are basically performed in the same manner as in the first embodiment. (14) and two first sewing machines (12) each, and while the two first sewing machines (12) are retracted away from each other, tape
(1) and the tape (1) can be sewn between the edges.

[0049]

As described in the section of operation, the tape-made tubular structure of the present invention employs a tape winding system, so that the circumference and width can be freely set. In addition, since the circumference can be precisely constant over the width of the tubular structure, it is difficult to correct the circumference by heat setting the warp and weft used for weaving the woven fabric when the tape is a woven fabric. Even when a heat-resistant yarn is used, a tape-shaped tubular structure having good dimensional accuracy can be obtained. Furthermore, if you want to obtain a wide tubular belt or tubular material, use a tape.
(1) Since a narrow woven fabric can be used, disadvantages due to an increase in the number of warp yarns during weaving as in the prior art are eliminated, and productivity is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an apparatus for manufacturing a tape-made tubular structure according to the present invention.

FIG. 2 is a front view of the manufacturing apparatus of FIG.

FIG. 3 is an explanatory view showing an example of a tubular structure at a stage after sewing between edges.

FIG. 4 is an explanatory view showing an example of the tape-shaped tubular structure of the present invention after sewing in the width direction.

FIG. 5 is a plan view showing another example of the apparatus for manufacturing a tape-made tubular structure of the present invention.

6 is a front view of the manufacturing apparatus of FIG.

FIG. 7 is a plan view showing still another example of the apparatus for manufacturing a tape-made tubular structure according to the present invention.

FIG. 8 is a front view of the manufacturing apparatus of FIG. 7;

FIG. 9 is a plan view showing another example of the apparatus for manufacturing a tape-made tubular structure of the present invention.

FIG. 10 is a front view of the manufacturing apparatus of FIG. 9;

[Explanation of symbols]

 (1) ... tape, (2) ... sewing thread between tape edges, (3) ... sewing thread in the belt width direction, (11) ... roll, (12) ... first sewing machine, (13) ... rail for moving sewing machine, ( 14) Tape supply reel, (15) Reel moving rail, (16) Second sewing machine, (17) Machine stand

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16G 1/00 F16G 1/00 ZE

Claims (4)

[Claims] A tape having a predetermined width is spirally wound such that edges of adjacent tapes abut each other, and the edges of adjacent tapes are joined by sewing to form a cylindrical structure. A tape-shaped tubular structure characterized by having a configuration in which the width direction of the tubular structure is also sewn. 2. The tape-shaped tubular member according to claim 1, wherein the sewing between the edges of adjacent tapes is performed by staggered stitching, and the sewing in the width direction of the cylindrical structure is performed by staggered stitching or linear stitching. Structure. 3. The tape is a woven fabric, and the warp and weft constituting the woven fabric are heat-resistant fiber yarns.
The tubular structure as described in the above. 4. The tape-shaped tubular structure according to claim 1, which is a pressure contact belt for corrugating.