JP3936809B2 - Papermaking dryer canvas joint - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint for connecting both ends of a paper-making dryer canvas body.
[0002]
[Prior art]
The paper dryer dryer used in the dryer part of a paper machine is composed of warps and wefts made of synthetic fibers, and joints are provided at both ends of the endless dryer canvas body. Used as an endless connection. Conventionally, as a joint structure, the wefts are removed from both ends of the end canvas body, and the reed warp-like warp is turned back by removing the wefts. A warp loop seam structure that weaves the folded tip into the canvas body, meshes the warp loops formed at both ends of the canvas body, and inserts and connects the connecting core wire to the warp loop common hole formed by meshing, The spiral filament made of synthetic resin monofilament is meshed with the warp loop, the spiral filament fixing core wire is inserted into the common hole formed by meshing, and the spiral filaments formed at both ends of the canvas body are meshed with each other. A spiral seam structure is generally used in which a connecting core wire is inserted into and connected to a spiral wire common hole formed by joining and meshing. It is.
[0003]
In addition, the joint that combines the warp loop seam structure and the spiral seam structure is a warp loop seam with a joint at the center that is equivalent to the paper passing width of the canvas body for the purpose of improving the thermal and mechanical strength of both ears. Japanese Unexamined Utility Model Publication No. 4-92598 discloses a paper dryer dryer joint having a structure in which a joint at both ears of the canvas body has a spiral seam structure.
[0004]
[Problems to be solved by the invention]
As described above, a spiral seam structure or a warp loop seam structure is generally employed as the joint structure, but each has advantages and disadvantages. For example, in the spiral seam structure, the shape, material, etc. of the spiral filament can be appropriately selected according to the atmosphere of the dryer part of the paper machine and according to the usage situation, and is resistant to bending fatigue. In addition, core wire insertion is simple and excellent in workability. On the other hand, since the spiral filament is composed of a single continuous synthetic resin monofilament, when one part of the spiral filament is cut for some reason during the travel of the canvas, the spiral shape is broken in a chain due to the tension related to the joint, so-called It has the disadvantage that mouth opening occurs.
[0005]
On the other hand, in the warp loop seam structure, since the warp loop is formed by the warp of the canvas body, it is limited by the woven structure of the canvas body, the horizontal density, the thickness, etc., making it difficult to prepare the loop space, and the warp loop is small Therefore, workability is difficult, for example, it takes time to insert the core wire. It is also vulnerable to bending fatigue. On the other hand, because warp loops are formed from individual warps, even if one warp loop is cut for some reason during the running of the canvas, it does not affect other warp loops, and is linked like a spiral filament. Has the advantage that no mouth opening occurs.
[0006]
In addition, the joint described in Japanese Utility Model Publication No. 4-92598 discloses that the joints of both ears of the canvas main body are connected to the main body of the canvas in order to realize heat resistance and high strength of both ears of the canvas main body at low cost. It has a spiral seam structure that consists of heat-resistant, high-strength spiral filaments that are hooked to the ears. However, as is well known, the dryer canvas is always in contact with the palm plate for detecting the running of the paper machine, so that both ears of the canvas body are particularly susceptible to abrasion damage due to the palm plate, and the joint portion is It is the biggest cause of damage. It is no exaggeration to say that the life of the canvas body is affected by the presence or absence of damage to the joint. Therefore, especially the spiral filaments hooked to the ears of the canvas main body are easily damaged by the palm plate, and once a part of the spiral filaments is cut, the spiral shape is broken in a chain due to the tension on the joint. In other words, so-called mouth opening occurs, and the joint portion is likely to be damaged. In addition, the joint described in the above publication is provided with a stepped portion on both ears of the canvas body, so that the joint of the spiral seam structure and the joint of the warp loop seam structure are aligned on the same line, and a common connecting core wire is used. Due to the structure of the connected joint portion, there are problems such as the weft of the stepped portion and the unraveling of the warp.
[0007]
In view of the problems of the conventional joint structure, the present invention aligns the joint of the spiral seam structure and the joint of the warp loop seam structure on the same line and connects them with a common connecting core wire without providing a step in the canvas body. Therefore, even if the joint has a spiral seam structure, it is possible to prevent the chain opening of the spiral filaments and to provide a joint that is resistant to abrasion damage of the canvas ear by the palm plate.
[0008]
[Means for Solving the Problems]
In the present invention, the joint structure of the canvas body corresponding to the non-sheet passing width is a warp loop seam structure in which the loop formed by folding the warp yarn of the canvas body is connected by the connecting core wire, The joint structure is a spiral seam structure in which the spiral filaments with both ends of the spiral filaments hooked to the boundary between the non-sheet-passing width equivalent part and the sheet-passing width equivalent part of the canvas body are connected by a connecting core wire. In a warp loop seam structure in which loops formed by turning back warp yarns of a main body are connected by connecting core wires, warp loop-back loops A for inserting loops formed by turning back warp yarns through spiral wire fixing core wires A And warp loopback loops B for inserting a connecting core wire having a loop shape larger than the loop A are alternately arranged, and further Both ends of Iraru streak fixing core, by hooking in a substantially central portion of the non-passing width corresponding portion of the canvas main body, has solved these problems.
[0009]
That is, the joint according to the present invention classifies the joint types of the canvas body corresponding to the non-sheet passing width portion and the sheet passing width corresponding portion, and adopts a spiral seam structure as the sheet width corresponding portion of the canvas body to form a spiral seam structure. By hooking both ends of the filament to the boundary between the non-sheet passing width equivalent portion and the sheet passing width equivalent portion of the canvas body, the spiral filament is configured not to be damaged by the palm plate. On the other hand, the warp loop seam structure is adopted in the portion corresponding to the non-sheet passing width of the canvas body so that the entire joint is not affected even if the palm plate is worn and damaged.
[0010]
Further, the joint according to the present invention has a warp loop seam structure in which the loop formed by warp wrapping is inserted into the warp loop back loop A for inserting the spiral wire fixing core wire, and a loop shape larger than the loop A. By alternately arranging the warp folding loops B for passing through the connecting core wires having a joint, a joint having a spiral seam structure and a joint having a warp loop seam structure can be obtained without providing step portions on both ears of the canvas body. It is configured so that it can be connected to a common connecting core line aligned with the same line. In addition, the spiral wire fixing core wire is configured so as not to be damaged by the palm plate by hooking both ends of the spiral wire fixing core wire to substantially the central portion of the canvas body corresponding to the non-sheet passing width. ing.
[0011]
Since the joint according to the present invention has the above-described configuration, it prevents the spiral filaments from being chain-opened and becomes a joint that is resistant to abrasion damage of the canvas ear due to the palm board.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The structure of the joint of the present invention will be described based on the embodiments with reference to the drawings. FIG. 1 is a plan view showing the outline of the joint (1) of the papermaking dryer canvas of the present invention, and FIG. 2 is the papermaking dryer of the present invention. FIG. 3 is an enlarged cross-sectional view of the warp loop seam joint AA of the canvas joint (1), and FIG. 3 is an enlarged cross-sectional view of the spiral seam joint BB of the joint (1) of the papermaking dryer canvas of the present invention. Yes. In addition, an Example is an example of this invention and is not limited to an Example.
[0013]
【Example】
The dryer canvas body (2) for papermaking is a double weave canvas obtained by weaving warps (3) and wefts (4) made of synthetic resin monofilament. The dryer canvas body (2) is the joint of the dryer canvas. It is connected endlessly in (1). The weft thread (4) is removed from both ends of the canvas body (2), which is formed by a known method, in the non-sheet passing width equivalent part (5) of the canvas body at the joint (1). The warp-shaped warp yarn (3) exposed by the above is folded back, and when one of the two is formed into a loop shape, the warp loop-back loop A (7) for inserting the spiral wire fixing core wire (6); A warp folding loop B (9) for inserting a connecting core wire (8) having a larger loop shape than the loop A (7) is formed, and the loop A (7) and the loop B (9) are alternately arranged. . The warp folded tip is woven into the canvas body, the warp folded loops B (9) formed at both ends of the canvas body are engaged with each other, and the connecting core wire (8) is inserted into the warp loop common hole formed by the engagement. An insertion warp loop seam structure joint (12) was formed.
[0014]
Next, the weft yarn (4) is removed from both ends of the canvas body (2), similarly formed by a known method, at the joint (1) at the canvas passage width equivalent portion (10). The warp-shaped warp yarn (3) exposed by removing is folded back, one of the two is looped, and a warp loop-back loop A (7) for inserting the spiral wire fixing core wire (6) is provided. The spiral filament fixing core wire (6) is inserted into the common hole formed by meshing the spiral filament (11) made of synthetic resin monofilament with the warp folding loop A (7). The spiral filaments (11) formed at both ends of (2) are meshed with each other, and the connecting core wire (8) is inserted into and coupled to the spiral filament common hole formed by meshing the spiral filaments (11). )of Sealed multiplied by the end in the boundary portion of the canvas main body non-passing width equivalent part of (2) (5) and passing width corresponding portion (10) to form a spiral seam construction joint (13).
[0015]
Both ends of the spiral wire fixing core wire (6) are hooked to the substantially central portion of the non-sheet passing width portion (5) of the canvas body (2), and the joint (1) of the paper making dryer canvas of the present invention is attached. Obtained.
[0016]
In the above, the spiral seam structure joint (13) and the warp loop seam structure joint (12) are aligned on the same line without providing step portions at both ends of the canvas body, and are connected by a common connecting core wire (8). Has been. Further, since both ends of the spiral wire fixing core wire (6) are hooked to the substantially central portion of the non-sheet-passing width equivalent portion (5) of the canvas body (2), the spiral wire fixing core wire hooking is performed. The warp loop-back loop A outside the portion (14) (on both ears of the canvas body) is not inserted with the spiral wire fixing core wire.
[0017]
【The invention's effect】
The joint of the paper making dryer canvas of the present invention has the spiral seam structure in the joint structure corresponding to the paper passing width which occupies the main part connecting the canvas main body. Therefore, the advantages of the spiral seam structure can be utilized. The shape, material, etc. can be appropriately selected according to the usage conditions according to the atmosphere of the dryer part of the paper machine, strong against bending fatigue, easy to insert the core wire, and excellent in workability. In addition, the non-sheet-passing width equivalent part including both ears of the canvas body, which is susceptible to abrasion damage due to the palm board, consists of a warp loop seam structure joint, thus preventing the continuous opening of the spiral filaments, which is a disadvantage of the spiral seam structure. In addition, it is a joint that is resistant to abrasion damage of the canvas ear by the palm plate, which is an advantage of the warp loop seam structure. As described above, the joint of the paper-making dryer canvas according to the present invention is a combination of a spiral seam structure joint and a warp loop seam structure joint without providing a step portion on both ears of the canvas body, and a spiral wire strip utilizing the advantages of both. It is a strong joint against abrasion damage caused by the palm board of a paper machine that prevents chain opening.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of a joint (1) of a papermaking dryer canvas of the present invention.
FIG. 2 is an enlarged cross-sectional view of a warp loop seam structure joint AA of a joint (1) of a papermaking dryer canvas of the present invention.
FIG. 3 is a cross-sectional enlarged view of a spiral seam structure joint portion BB of a joint (1) of a papermaking dryer canvas of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Joint of the dryer canvas for papermaking of this invention 2 Dryer canvas main body 3 Warp yarn 4 Weft 5 Non-sheet passing width equivalent part of canvas main body 6 Spiral filament fixing core wire 7 Warp yarn return loop A
8 Core wire for connection 9 Warp wrap loop B
DESCRIPTION OF SYMBOLS 10 Passing width equivalent part of canvas main body 11 Spiral wire 12 Warp loop seam structure joint 13 Spiral seam structure joint 14 Spiral wire fixing core wire latching part 15 Spiral wire thread latching part

Claims (3)

For connecting paper fabric dryer canvas ends woven with synthetic warps and wefts, for connecting the joint structure of the canvas body to the non-sheet-passing width, and connecting the loop formed by folding the warp of the canvas body The warp loop seam structure is connected by a core wire, and the joint structure of the canvas body corresponding to the paper passing width is connected to the boundary between the non-sheet passing width equivalent part and the paper passing width equivalent part of the canvas body. A papermaking dryer canvas joint characterized by a spiral seam structure in which spiral wires are connected by a connecting core wire. In a warp loop seam structure in which loops formed by folding warp yarns of a canvas body are connected by a connecting core wire, the loops formed by folding the warp yarns pass through the spiral wire fixing core wire. A and a warp folding loop B for inserting a connecting core wire having a larger loop shape than the loop A, wherein the loop A and the loop B are alternately arranged. The paperboard dryer canvas joint described. 3. The papermaking dryer canvas joint according to claim 2, wherein both ends of the spiral wire fixing core wire are hooked to a substantially central portion of a portion corresponding to the non-sheet passing width of the canvas body.

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