JP2984575B2 - Structure of the joint part of the endless conveyor belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drier canvas for papermaking or a joint of a conveyor belt as a conveyor belt for processing nonwoven fabrics, fabrics, foods and the like.

[0002]

2. Description of the Related Art Conventionally, as a coupling for a papermaking dryer canvas, as shown in Japanese Utility Model Laid-Open Publication No. 55-106697, both ends of a canvas main body are folded back and polymerized and fixed to the main body. Joint in which a spiral wire is meshed with a spiral loop,
As in Japanese Patent Publication No. 04, a weft is pulled out in the middle, a cord is formed with a warp, and both ends are folded back to form a loop, the reinforcing fabric is sewn to the canvas body, and a joint using a metal hook is devised. I have.

[0003] Alternatively, as disclosed in Japanese Utility Model Laid-Open Publication No. 63-170500, one of two adjacent warps of an extended warp extended by removing end wefts at both ends of a canvas is folded and joined. A loop is formed, the other is removed according to the folded length of one, and the folded warp is sewn into the lacking portion of the warp caused by this removal to form a joint, and a restraining yarn thinner than the canvas warp is formed at the joint. Or a joint inserted along the warp to wrap the state-of-the-art weft.
No. 94, the end of a plain-woven open mesh canvas is folded back to form a loop, a spiral wire is engaged with the loop, and a portion of the weft and its warp of the folded portion that is folded back and polymerized. There is a joint having a joint structure in which a binding thread thinner than the canvas main body weft is spelled into a rectangular weave portion formed by extracting the main body weft located above and connected to the canvas main body.

Further, in Japanese Patent Application Laid-Open No. 6-183532, when forming joining loops of extended warp at both ends of a base fabric woven in a plain weave with synthetic resin monofilament, one of adjacent warps is formed. The adjacent extended warp is folded back and sewn into that portion, and the intersection of the end of the extended warp and the end of the warp that has been removed is left on the same warp on the back side of the base fabric. And a heat-fixed portion, and cut at both protruding portions and a surface not protruding from the back surface of the base fabric to form a joint portion.

[0005]

However, when these are used as joining loops of a plain-woven open mesh canvas, for example, the one disclosed in Japanese Utility Model Laid-Open No. 55-106697 has a doubled end portion twice that of the main body canvas. Because the papermaking dryer canvas is stretched by the curved surface of the roll, the smaller the roll diameter is, the harder it is to bend because of its thickness, and the polymerization end does not follow the curved surface of the roll as much as the main body. Since the boundary between the portion and the canvas main body is repeatedly bent, there is a problem that the boundary is cut easily before the end of the life of the main body because the fatigue breakage occurs more easily than other portions.

[0006] Next, Japanese Utility Model Laid-Open No. 51-94804 discloses the use of a metal hook for the same reason as described above, which has a problem at the boundary with the metal hook. Although it is greatly eased by comparison, the same problem may occur due to the double warp.

In Japanese Utility Model Application Laid-Open No. 63-199194, when a joint is used for an open mesh canvas having a plain weave, the coarser the mesh, the more inclined the loop hole becomes. However, there is a problem that it is difficult to insert the core wire when making it endless.

Further, in the case of Japanese Patent Application Laid-Open No. Hei 6-183532, only the extended warp end and the warp are fused by heat fusion. Thus, the tension in the longitudinal direction of the canvas may cause the fused portion to be easily broken by fatigue.

The present invention has been made to solve such a problem.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided an endless conveyor belt made of synthetic resin monofilament or synthetic resin multifilament and woven into an open mesh having a plain weave structure. The extended warp is extended to a set of two types of warp: a long warp, which keeps its length as it is, and a short warp, which is drawn and cut by a predetermined number of wefts from the end of the base fabric and cut. The long warp is folded back to form a joining loop, and the long warp is again folded back with the weft entangled with the yarn end of the short warp and sewn from the conveyor belt main body side toward the loop forming section side. It is characterized by the following.

According to another aspect of the present invention, in a conveyor belt formed by weaving a synthetic resin monofilament or a synthetic resin multifilament into an open mesh having a plain weave structure, wefts at both ends of a base fabric are removed and extended. Two types of warp yarns, a long warp yarn that keeps its length as it is and a warp yarn that is not cut and pulled out by a predetermined number of wefts from the end of the base fabric (hereinafter referred to as a drawn warp yarn), are put together as one set. The long warp is folded back to form a joining loop, and the long warp is sewn to the weft at the extreme end where the drawn-out warp is entangled, and then folded again to conveyer belt body side (hereinafter referred to as body side). From the loop forming portion side toward the main body side. It is characterized in that the writing.

The open mesh used in the present invention is:
A plain weave with a relatively coarse mesh is good. In particular, in the case of a monofilament open mesh, it is desirable that the warp occupancy is 35% or less and the mesh size of the open mesh is larger than 50 mesh. Warp occupancy 35%
As described above, if the mesh size of the open mesh is smaller than 50 mesh, it becomes difficult to bind the warp after forming the loop portion, and therefore, it is impossible to form the joint portion which is the subject of the present invention. The warp occupancy is a value calculated by the following equation.

[0013]

(Equation 1)

Further, for example, the folded portion (3A) after forming the loop portion in FIG.
For example, the folded portion (3B) is folded with a different weft from the folded portion (3A), so that the stress is distributed and applied to several wefts. It is necessary to form (3A).

In the present invention, in order to form a loop (5) and form a joint after being folded again (3A), a warp stitched from the side of the conveyor belt toward the loop forming portion is formed. The length of the part (4) is 1
cm to 5 cm is good, and the spelling length is 1
When the length is 0 cm or more, the warp occupancy may increase due to the binding of the warp, which may cause a reduction in the length of the conveyor belt in the width direction or a decrease in the air permeability of the conveyor belt.

According to another aspect of the present invention, the loop (5) is formed, and after being folded again (3C) , a joint is formed from the conveyor belt main body toward the loop forming section in order to form a joint. Of the warp binding part (4)
Length, or the warp yarns are not cut pull a length of several partial weft from the base fabric ends (11) to form a joint portion, spelling of warps are incorporated spelling toward the loop forming portion on the conveyor belt body The length of the embedded portion (6) is preferably 1 cm to 5 cm.

In the folded portion (3A) as described above, it is necessary to distribute the stress to several wefts so that no stress is applied to one weft.
The conveyor belt forming A) has a width in the longitudinal direction of 5 cm or more.
In the range of 20 cm, it is better to disperse form on SL folded portion (3A) within its scope. Further, the number of wefts to which the above-mentioned dispersed stress is applied within the above range is 1
It is preferable that the number is zero or less.

Further, as a method of joining the conveyor belt according to the present invention, as shown in FIGS. 3 and 4, a spiral wire can be engaged with the loop forming portion by an auxiliary core wire.

[0019]

According to the present invention, since the folded warp ends are firmly held in the tissue by being sewn, the loop portion or the joint portion is damaged when tension is applied to the warp and the warp ends may be damaged. Of the warp ends can be suppressed. Further, since the warp and the weft are physically entangled with each other, the joint has flexibility, and fatigue damage of the joint due to bending can be suppressed.

[0020]

EXAMPLES Example 1] FIG warp as shown in 1 (1) and weft (2) are both wire diameter polyethylene terephthalate 0.5mm monounsaturated
Warp density and weft density with I La instrument has no a dryer canvas base fabric is woven in an open mesh plain weave of both 16 yarns / inch.

The extended warp extended by removing the end weft from both ends of the base fabric and having the same length as the long warp (7).
And two types of short warps (8) cut out by pulling out a length of 10 to 30 wefts from the end of the base fabric and cutting one by one.
As a set, the long warp yarn (7) was folded to form a joining loop (5). Next, the long warp (7) is bound to the weft (9) entangled with the yarn end of the short warp (8), and then folded again (3A), and the loop forming portion (5) is conveyed from the conveyor belt body side. ) Side to form a joint portion. The folded portion was dispersedly formed over a width of 10 cm with respect to the longitudinal direction of the canvas.

[0022] [Embodiment 2] FIG 2 warps as shown in (1) and weft (2) are both wire diameter polyethylene terephthalate 0.5mm monounsaturated
Warp density and weft density with I La instrument has no a dryer canvas base fabric is woven in an open mesh plain weave of both 16 yarns / inch.

At each end of the base fabric, the extended warp removed by removing the weft at the end is replaced with a long warp (1) which keeps its length.
0) and 10 to 30 wefts from the end of the base fabric and are not cut and cut (hereinafter referred to as drawn warps) (1)
The two types of warp yarns 1) were put together to form a set, and the long warp yarns (10) were folded back to form a joining loop (5). Then, after binding the long warp (10) to the weft (9) at the extreme end where the drawn warp (11) is entangled, it is folded again (3C) on the conveyor belt main body side (hereinafter referred to as main body side). From above toward the loop forming portion (5). Next, the drawn warp (1)
1) was folded back (3D) with the endmost weft (9) and sewn from the loop forming portion (5) side toward the main body to form a joint portion. The folded portion was dispersedly formed over a width of 10 cm with respect to the longitudinal direction of the canvas.

[Embodiment 3] As shown in FIG. 3, a spiral wire (12) is engaged with an auxiliary core wire (13) to a loop forming portion (5) at an end portion of a canvas having a plain weave structure prepared in the embodiment 1. The joint of the conveyor belt was formed by combining.

[Embodiment 4] As shown in FIG. 3, a spiral wire (12) is engaged with an auxiliary core wire (13) to a loop forming portion (5) at an end of a canvas having a plain weave structure prepared in the above-mentioned Embodiment 2. The joint of the conveyor belt was formed by combining.

The joint strengths of the conveyor belts produced in the above examples were all 30 kg / cm or more.

[0027]

According to the present invention, a joining loop is formed by removing one end of a weft from both ends of a base fabric and folding one of two adjacent warps of the extended warp. By wrapping the warp with the weft of the base fabric again and binding it into the base fabric structure, the warp is firmly bonded to the base fabric structure, so that the joint strength is improved, and furthermore, the joint part of the joint is physically Since it is caused by the entanglement of the warp and the weft, there is no effect on the elongation due to the tension directly applied to the base fabric or the shrinkage due to heat. Further, since the folded portion of the warp and the weft is formed so as to disperse the stress applied to the portion, it is possible to prevent the opening of the base fabric.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a joint portion of a conveyor belt of the present invention.

FIG. 2 is an enlarged view of a joint part of the conveyor belt of the present invention.

FIG. 3 is a diagram of an end of the conveyor belt in which a spiral wire is engaged with a loop forming portion.

FIG. 4 is a side view of a main part of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warp 2 Weft 3A Warp return part 4 Warp binding part 5 Loop forming part 12 Spiral wire 13 Auxiliary core wire

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-110739 (JP, U) JP-A 55-111999 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65G 15/30-15/58 F16G 3/10 D06H 5/00 D21F 7/10

Claims (2)

(57) [Claims] 1. An endless conveyor belt made of synthetic resin monofilament or synthetic resin multifilament woven into an open mesh having a plain weave structure, the extended warp extended by removing the weft at both ends of the base fabric. To
Two types of warp yarns, a long warp yarn that keeps its length as it is and a short number of short warp yarns that are drawn out from the end of the base fabric by a predetermined number of weft yarns, are put together as one set, and the long warp yarns are folded back to form a joining loop. A conveyor belt, wherein the long warp yarn is sewn to the weft yarn entangled with the yarn end portion of the short warp yarn, folded again, and sewn from the conveyor belt main body side to the loop forming unit side. Structure of the joint. 2. A conveyor belt formed by weaving a synthetic resin monofilament or a synthetic resin multifilament into an open mesh having a plain weave structure, wherein the extended warp extended by removing the end weft from both ends of the base fabric. Two types of warp yarns, a long warp yarn that maintains its original length and a warp yarn that is not cut and cut out by a predetermined number of wefts from the end of the base fabric (hereinafter referred to as a drawn warp yarn), are put together as one set, and the long warp yarn is folded back and joined. After forming the loop, the long warp is bound to the endmost weft where the drawn-out warp is entangled, and then folded again to move from the conveyor belt body side (hereinafter referred to as the body side) to the loop forming section side. A conveyor, wherein the drawn-out warp is folded back by the endmost weft yarn and bound from the loop forming portion side toward the main body side. Structure of the belt joint.