JP2006144847A - Resin belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin belt formed in a joint-less type which requires no joint working and securely preventing reveling phenomenon from occurring at the end part of the belt. <P>SOLUTION: In this resin belt, a hollow-weaved canvas is formed in a core, dipping treatment is applied to the canvas core, and a resin cover is stacked on at least one surface of the dipping-treated canvas core. A spun yarn is used for the weft of the hollow-weaved canvas forming the belt in the longitudinal direction, the weaving density of the weft is made high to form a high-dense fabric structure using the weft of N in quantity so that the requirement of expression 1 can be satisfied, where S is the English yarn count of weft. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a resin belt having a canvas as a core, and more particularly to a resin belt that prevents a fraying phenomenon mainly having a canvas core at the belt end.

  Conventionally, a resin belt has been manufactured by pressure-bonding a resin cover such as a urethane sheet to a woven fabric serving as a core, or by laminating a non-vulcanized rubber composition and vulcanizing it.

  In addition, a cut edge operation for cutting a wide belt material into a predetermined width is performed to manufacture a belt having a desired width dimension. Therefore, the cut surface of the canvas core body is exposed at both side edges (belt ears) in the width direction of the belt.

  If meandering or misalignment occurs during belt running, the ears of the belt are damaged by rubbing against pulley flanges, conveyor frames, and the like, and a fraying phenomenon mainly consisting of a canvas core occurs.

  The fraying phenomenon means that the knitted yarn constituting the canvas core is frayed, and the resin layer laminated on the canvas core together with the frayed yarn is broken.

  Therefore, in order to prevent the fraying phenomenon, a belt in which a predetermined core amount is given by dipping a canvas core body of a cut edge type resin belt a plurality of times has already been filed (for example, see Patent Document 1). .

  The dipping treatment is to coat the entire surface by immersing the canvas in a tank containing a resin adhesive (for example, solution urethane).

  In order to prevent the fraying phenomenon, a belt in which a warp yarn of a canvas core corresponding to the longitudinal direction of the belt is used as a spun yarn using short fibers has already been filed (for example, see Patent Document 2).

  Further, when manufacturing a resin belt having a predetermined circumferential length, an endless belt is manufactured by jointing belt-shaped belts cut to a predetermined length. However, in order to produce a seamless belt that does not require joint processing, a seamless woven fabric bag-woven as a core body is used, a core body cut to a predetermined belt width is formed, and a urethane sheet or the like is formed on the core body. It is known to produce a seamless belt by laminating and vulcanizing.

  In general, bag weaving means that warp yarns are arranged in two upper and lower layers, the wefts open the two adjacent warp yarns, make one round trip around the opened shed, and then each adjacent one The warp is opened upside down and the weft is recirculated to create a plain weave canvas. At this time, only the weft turn-back portions at both ends in the width direction are connected and the central portion is separated, and the canvas is woven into a tubular shape.

  Therefore, a belt having a tubular canvas woven as a core can be a seamless belt that does not require joint processing.

  At that time, the longitudinal direction (circumferential direction) of the belt, that is, the warp direction of the belt corresponds to the weft direction of the fabric, and the width direction of the belt, that is, the weft direction of the belt corresponds to the warp direction of the fabric. Become.

The applicant also has filed an application relating to a conveyor belt in which a bag-woven cylindrical woven fabric is applied as a tensile body and a method for manufacturing the same. (For example, see Patent Document 3)
Japanese Patent Laid-Open No. 10-297730 (page 1-3, FIG. 1) JP 11-130222 A (page 1-3, FIG. 1) Japanese Examined Patent Publication No. 63-35526 (page 1-3, Fig. 4)

  The conventional cut-edge type resin belt has a structure in which the canvas core is exposed on the cut surface of the belt ear, and the belt end contacts the pulley flange, conveyor frame, etc. due to meandering or deviation generated during belt running. Fraying phenomenon occurs when rubbed.

  When the fraying phenomenon occurs, the belt end has a shabby appearance, giving an unpleasant feeling, and the thread or the resin layer that becomes shabby may fall, and may be scattered around and mixed into the conveyed object. Occurs.

  In particular, in the food industry in which food is conveyed by a resin conveyor, it is a problem in terms of food hygiene and quality control that foreign matters are mixed into the conveyed food, and it is desirable to employ a resin belt that does not cause fraying.

  In order to prevent the fraying phenomenon, the effect of the belt using a canvas core body in which the warp yarn composed of short fibers is simply used as a belt in which the dipping process is simply performed a plurality of times or in the longitudinal direction of the belt. Is still inadequate.

  Furthermore, in the belt using the bag-woven canvas core body, since there is no joint part that is most easily damaged by the belt, the life can be extended. Further, since there is no joint portion that increases in weight, the density becomes uniform over the entire length of the belt, and the belt is optimal for a weighing conveyor.

  However, in order to increase the strength of the canvas core, monofilament yarn is used for the warp of the woven fabric and the conventional bag woven canvas is simply woven into a plain weave. Since the density cannot be increased, it is difficult to sufficiently prevent fraying of the weft in the longitudinal direction of the belt exposed at the belt end.

  For this reason, in a belt using a canvas core body that is simply woven into a plain weave, the belt end portion comes into contact with the pulley flange, the conveyor frame, etc. due to meandering or shifting when the belt runs, and a fraying phenomenon occurs. The problem is not resolved.

  In order to solve the above-described problems, an object of the present invention is to provide a resin belt that is a seamless belt that does not require joint processing and that can more reliably prevent fraying at the belt end. .

  In order to achieve the above object, the invention according to claim 1 is characterized in that a bag-woven canvas is used as a core, the canvas core is dipped, and a resin cover is laminated on at least one surface of the dipped canvas core. When the warp of the bag woven canvas in the width direction of the resin belt is a monofilament yarn, the weft density of the bag woven canvas constituting the longitudinal direction of the resin belt is used as the aligned yarn, and the weave density is It is characterized by high density.

  According to the invention according to claim 1 having the above-described configuration, since the canvas core body is woven, a seamless belt that does not require joint processing can be obtained. Furthermore, since the weft yarn is driven and weaved as the weft yarn, even if the warp yarn of the bag-woven canvas is a monofilament yarn, the weave density of the canvas core body that hits the longitudinal direction of the belt can be increased. Therefore, a fraying phenomenon of the belt end can be prevented by using a canvas core having a dense woven structure with a high weave density.

  The invention according to claim 2 is characterized in that the number N of wefts per 5 cm width of the bag-woven canvas satisfies the following mathematical formula 1.

ここで、Ｎが緯糸本数（５ｃｍ当たりの本数）であり、Ｓは緯糸の英式綿番手である。

Here, N is the number of wefts (number per 5 cm), and S is the English cotton count of the wefts.

  According to the invention according to claim 2 having the above-described configuration, since the weft is a bag weave using aligned yarns, the number of high-density wefts cannot be achieved by a normal bag weave.

  The invention according to claim 3 is characterized in that the weft is a 20-30 th spun yarn made of short fibers having a fiber length of 25-75 mm, and the weave density is 80-150 yarns / 5 cm.

  According to the invention according to claim 3 having the above-described configuration, the weft yarn having a short fiber length is used as the canvas core body having a dense woven structure, so that the fraying phenomenon at the belt end portion is further effectively prevented. be able to.

  The invention according to claim 4 is characterized in that the weft is an aligned yarn of S-twisted yarn and Z-twisted yarn.

  According to the invention which concerns on Claim 4 which has said structure, the resin belt which can prevent a fraying phenomenon and can prevent the shift | offset | difference at the time of belt travel can be obtained.

  The invention according to claim 5 is characterized in that a carbon-containing yarn is added to the weft.

  According to the invention according to claim 5 having the above-described configuration, it is possible to obtain a resin belt that can prevent the fraying phenomenon and has good conductivity.

  The invention according to claim 6 is characterized in that the warp is a monofilament yarn and the weaving density is 65/5 cm or more.

  According to the invention concerning Claim 6 which has said structure, the intensity | strength of the canvas core body equivalent to the width direction of a belt can be improved, and the resin belt provided with the canvas core body of a dense woven structure can be obtained.

According to the present invention, a resin belt that is seamlessly woven and has a densely woven canvas core body can be obtained without a seam and can effectively prevent the belt fraying phenomenon. Can do.

  Hereinafter, embodiments of the resin belt according to the present invention will be described in detail with reference to FIGS. 1 to 5.

  FIG. 1 is a cross-sectional view showing a configuration example of a resin belt according to the present invention. FIG. 2 is a schematic view of a bag weave. FIG. 3 is a schematic plan view showing an example of a woven structure of a canvas core. FIG. 4 is an explanatory view of the appearance of the fraying test apparatus. FIG. 5 shows a frayed state (photo substitute) of the belt after the fray test.

  The resin belt 1 shown in FIG. 1 has a canvas core body 2 dipped in a tank containing a resin adhesive (for example, solution urethane), dipped, and a coating layer 3 is formed on the entire surface. In this configuration, a resin cover is laminated on at least one surface. As the resin cover, the resin belt 1 may be formed by laminating the front side cover layer 4 shown by the solid line in the figure, but the resin belt may further include the back side cover layer 5 shown by the imaginary line and having the cover layers on both sides. .

  The core body 2 is, for example, a canvas woven with warps T and wefts Y or a woven fabric coated with an adhesive rubber. When a canvas seamlessly configured in a belt shape is adopted, the canvas core is A smooth and continuous structure is obtained, and the rubber composition can be integrally coated on the surface of the core to produce a seamless belt. Therefore, when a canvas woven on the canvas core 2 is applied, a resin belt without a step or a joint can be manufactured, which is preferable.

  As described above, bag weaving means that warp yarns are arranged in two upper and lower layers, and the weft yarns are reciprocated once so as to circulate around the sheds of the respective warp yarns of the two layers. On the contrary, since the weft is circulated again by opening the weft, only the weft turn-back portions at both ends in the width direction are connected and the central portion is separated, and the canvas is woven in a tubular shape. .

  FIG. 2 shows a schematic diagram of the bag weave 30. The first layer of warp A31 and the second layer of warp A32 are spirally reciprocated so that the weft Y circulates in a cylindrical fabric ( It can be seen that weaving canvas.

  For this reason, a belt using a woven fabric woven with a bag as a canvas core body can be integrally manufactured by coating a resin layer on the core body. Moreover, the longitudinal direction (circumferential direction) of the belt obtained at this time corresponds to the weft Y direction of the woven fabric.

  The longitudinal direction (circumferential direction) of the belt, that is, the warp direction of the belt corresponds to the weft Y direction of the fabric, and the width direction of the belt, that is, the weft direction of the belt corresponds to the warp T direction of the fabric.

  Also, when weaving a bag, a conventional bag woven canvas that is woven into a plain weave simply using a monofilament yarn for the warp of the fabric does not increase the weft density during weaving because of the rigidity of the monofilament yarn. In the present embodiment, the warp is used as the aligned yarn, and a plurality of wefts are aligned and driven to increase the weft density (alignment effect).

  FIG. 3 shows an example of the weave structure of the canvas core body, but the aligned yarn is adopted as the weft Y that is driven into the warp T. In the figure, two wefts Y1 and Y2 are aligned, but three or four may be used depending on the thickness of the yarn, and the number is not particularly limited to two.

In addition, when the 20 to 30th spun yarn made of short fibers having a fiber length of 25 to 75 mm is used as the weft Y, the weft Y is 80 to 80 when the thick yarn of about 20th is aligned. Good results were obtained with about 130 pieces. In addition, in the case of 30th finer than that, the number of driving can be increased to about 150. That is, when 20-30th spun yarn was used, good results were obtained when the number of wefts Y (weaving density) was 80-150 / 5 cm. In addition, when the number of aligned lines is increased to 3 or 4 instead of double alignment, the weft density can be further increased because the arrangement can be made more densely.

  When the number of driven-in pieces (the number N of wefts per 5 cm in width) is expressed by a mathematical formula, the following mathematical formula 1 applies.

ここで、Ｓは緯糸Ｙの英式綿番手である。

Here, S is the English cotton count of the weft Y.

  According to Equation 1, when the weft Y is 20th, the number N of wefts is approximately 80 to 125 / 5cm, and when the weft Y is 30th, approximately 100 to 153 / 5cm. Therefore, when 20-30th wefts are used, it becomes 80-153 pieces / 5cm, and it turns out that it is a numerical formula which agrees well with the above-mentioned experimental result.

  As described above, when the aligned yarn is adopted as the weft Y, it is preferable that the S twisted yarn and the Z twisted yarn are aligned and driven. With this configuration, the twisting torques of each other are canceled out and equalized, so there is no residual torque in the canvas core, preventing the belt from skewing or meandering when the belt is wound around the pulley can do.

  Further, when the S twisted yarn and the Z twisted yarn are aligned, they may be aligned in the order of SZ-SZ, SSZZ-SSZZ, or SZS-ZSZ and driven in order. That is, the S twisted yarn and the Z twisted yarn need only be arranged at an equal ratio.

  As described above, since the fabric configuration adopts the spun yarn in the longitudinal direction (circumferential direction) of the resin belt 1, the resin adhesive (for example, solution urethane) penetrates into the fabric reliably when dipping. Glued. Further, since the weft Y composed of spun yarn (short fibers) is woven into the canvas at high density, the canvas core 2 has a structure that is difficult to fray due to the entanglement effect between the short fibers.

  If the belt meanders or deviates while the resin belt 1 is traveling, the belt end comes into contact with the pulley flange, the conveyor frame or the like and rubs, causing a fraying phenomenon.

  However, as described above, the spun yarn having a structure in which a number of short fibers are twisted in the longitudinal direction of the resin belt 1 is woven at a high density and impregnated with a resin adhesive. It is fixed and difficult to fray. Further, even if a fraying phenomenon occurs, the short fibers constituting the spun yarn are only frayed, so that the fraying of the yarn is not propagated and the appearance of the belt is not impaired.

  Further, it is also possible to add a carbon-containing yarn to the weft Y when bag-weaving and align it. With this configuration, a fraying phenomenon can be prevented and a resin belt having good conductivity can be obtained, and static electricity generated when the conveyed object and the resin belt 1 are rubbed can be diffused, and a conductor such as a pulley can be connected. It is preferable that it can be discharged via.

  In order to increase the weave density of the canvas core body 2, it is preferable not only to increase the number of weft yarns Y driven, but also to increase the weave density of the warp yarns T. At this time, if the warp T is a monofilament yarn and the weaving density is 65/5 cm or more, since the monofilament yarn having a high single yarn strength is used, the strength of the canvas core corresponding to the width direction of the belt is increased. At the same time, the rigidity in the width direction of the belt can be increased. Therefore, it is possible to provide a belt that has belt strength and is difficult to deform. In addition, since the weaving density is increased by using the weft Y as the aligning yarn, the resin belt that can further prevent the fraying phenomenon is preferable because of the aligning effect and the entanglement effect described above.

  Next, the results of the fraying test will be described with reference to FIGS.

  The fraying test apparatus M shown in FIG. 4 includes a pulley 11 that is rotatably fitted with a resin belt 10 fitted therein. Further, the end of the resin belt 10 is mounted on the outside of the pulley 11 so as to slightly protrude, and the contact plate 13 is pressed against the protruding belt end 10A.

  The contact plate 13 is swingably supported by the support member 12 via a support shaft 13B, and a contact plate tip portion 13A is pressed against the belt end portion 10A by a weight 15 suspended via a rotation guide 14. . That is, the pressing force F of the abutting plate tip 13A can be adjusted by changing the weight of the weight 15.

  Here, a fraying test was performed by adding 1 kg of weight with the belt end 10A protruding H (for example, 7 mm) and setting the pulley rotation so that the belt peripheral speed became 50 m / min.

  FIG. 5 shows the results of the fraying test performed continuously for 24 hours. In the conventional resin belt 1A, the warp corresponding to the width direction of the belt is polyester monofilament 600 denier, and the warp density is 65/5 cm. In addition, a 1 mm resin cover layer is laminated on a bag-woven canvas in which the weft corresponding to the longitudinal direction (circumferential direction) of the belt is twisted 50/10 cm with English count 30 (Ne30) and the weft density is 70/5 cm. It is a thing. As shown in the figure, the conventional resin belt 1 </ b> A is damaged by severely damaging the end of the belt and causing a long fraying phenomenon. However, the resin belt 1B according to the present embodiment has the same polyester monofilament 600 denier warp density of 65 / 5cm, the weft is an English count 30 (Ne30), the twist number is 50 / 10cm, and the weft density is 120 / It has a high-density weaving structure of 5cm. Therefore, the weft density is as high as 1.7 times, and even if the fraying test is performed for the same time under the same conditions, almost no fraying phenomenon occurs as shown in the figure.

  As described above, according to the present invention, it is possible to increase the weave density of the weft of the canvas core that hits the longitudinal direction (circumferential direction) of the belt. The fraying phenomenon at the end can be prevented. In addition, since it is a canvas core body having a dense woven structure with wefts made of short fiber length spun yarn, it becomes difficult for the fraying of the yarn to propagate, and the fraying phenomenon at the belt end can be more effectively prevented. .

  As the spun yarn of the weft Y according to the present invention, polyester is mainly employed, but a spun yarn made of short fibers or mixed fibers such as polyamide, vinylon, rayon, aramid fiber, cotton, etc. is appropriately selected and used. You can also

Further, a bag weave having a desired circumferential length is cut into a predetermined width to obtain a canvas core, and a belt body is formed by coating a rubber composition or the like on one side or both sides of the canvas core. Alternatively, a resin belt having a desired width can be obtained by cutting a wide belt body into a predetermined width (cut edge operation).

  The front side cover layer 4 (see FIG. 1) is a surface that forms the conveying surface of the belt body, and has functions (hardness, sliding, rigidity, etc.) and design (color, aperture, pattern, etc.) required by the conveyed item. The material (for example, a rubber composition such as urethane rubber or silicon rubber) and the shape (thickness, surface shape, etc.) corresponding to the material are appropriately selected.

  Further, the thickness E of the resin belt 1 is an important dimension for designing the minimum pulley diameter constituting the transport system in relation to the belt strength and flexibility, and in this embodiment, the thickness E of the belt is set to 0. About 3 to 3 mm. Therefore, the resin belt can be applied from a small conveyance system having a small-diameter pulley by a relatively low strength belt to a conveyance system having a relatively large-diameter pulley.

  If the belt thickness E is 0.2 mm or less, sufficient belt strength cannot be obtained and the belt is not suitable as a conveyance belt. If the belt thickness E is 4 mm or more, the minimum pulley diameter becomes large, and This is because the system becomes larger than necessary.

  As described above, since the resin belt 1 according to the present invention is manufactured using a woven fabric as a canvas core body 2, the core body 2 has a smooth surface without any step or seam. is there. Therefore, an overall thin belt can be manufactured, and a belt body in which the core body 2 is subjected to dipping treatment to form the coating layer 3 on the entire surface and the front cover layer 4 is laminated thereon can be configured. Thus, a smooth belt having a thin and uniform thickness can be obtained, in which a step or the like does not occur on the belt surface, and a fraying phenomenon hardly occurs.

  As described above, according to the present invention, since the resin belt has no seam and can prevent the belt end fraying phenomenon, a resin belt particularly suitable for a food conveyance belt or a weighing conveyor can be obtained.

It is sectional drawing which shows one structural example of the resin belt which concerns on this invention. It is a schematic diagram of a bag weave. It is a schematic plan view which shows an example of the woven structure of a canvas core. It is external appearance explanatory drawing of a fraying test apparatus. The frayed state of the belt after the fray test (photograph substituted) is shown.

Explanation of symbols

1 Resin belt 2 Canvas core 3 Coating layer 4 Front cover layer (resin cover)
10A belt end 30 bag weaving E belt thickness T warp Y weft

Claims (6)

A resin belt having a bag-woven canvas as a core, dipping the canvas core, and laminating a resin cover on at least one surface of the dipped canvas core,
When the warp yarn of the bag woven canvas that is the width direction of the resin belt is a monofilament yarn, the weft density of the bag woven canvas constituting the longitudinal direction of the resin belt is used as the aligned yarn, and the weaving density is increased. Characteristic resin belt. 2. The resin belt according to claim 1, wherein the number N of wefts per 5 cm width of the bag-woven canvas satisfies the following formula 1.

Here, N is the number of wefts (number per 5 cm), and S is the English cotton count of the wefts.   3. The resin according to claim 1, wherein the weft is a 20-30 th spun yarn made of short fibers having a fiber length of 25-75 mm, and has a weaving density of 80-150 / 5 cm. belt.   The resin belt according to any one of claims 1 to 3, wherein the weft is an aligned yarn of S-twisted yarn and Z-twisted yarn.   The resin belt according to claim 4, wherein a carbon-containing yarn is added to the weft. 6. The resin belt according to claim 1, wherein the warp is a 600 denier polyester monofilament yarn, and the weave density is 65/5 cm or more.

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