JP4881706B2 - Felt with seam for papermaking - Google Patents

Description

  The present invention relates to a felt with a seam for papermaking, in which a loop for end joining is formed by turning back warps constituting a base fabric.

  In order to improve the workability into the paper machine, a so-called seam felt in which end felts are drawn into a felt run and both ends thereof are joined to each other to be endless is widely used. In this type of seamed felt, loops formed at the end in the length direction by folding back the warp constituting the base fabric are alternately meshed so that their center holes are aligned with each other, thereby forming a common hole formed thereby. The structure which joins both ends through a core wire is common.

Such a felt with a seam has a seam portion, and various problems that do not occur with an endless felt, such as a seam mark on a product due to structural differences between the seam portion and the ground portion, Or the problem that the non-woven fiber layer falls off at the seam part occurs, and the problem that the workability at the time of end joining deteriorates due to the deformation of the loop occurs. On the other hand, various techniques are known in which a yarn different from the ground portion is separately added in the vicinity of the loop to cope with it (for example, see Patent Documents 1 to 15).
Japanese Utility Model Publication No. 56-6479 Japanese Utility Model Publication No. 55-47920 JP 02-68389 A Japanese Patent No. 3027415 Japanese Patent No. 3629276 Special Table 2002-52365 JP 2002-523653 A Special table 2003-504533 gazette JP 2002-294579 A Japanese Patent No. 3767585 JP 2003-239194 A JP 2003-247191 A JP 2002-294579 A JP 2004-232142 A JP 2004-285554 A

  However, in the felt with seam, the shape of the loop formed by turning back the warp yarn is curved, and the roll of the paper machine comes into contact with the portion that swells on the running surface side of the loop. Wear occurs. In particular, loop wear significantly occurs at the end in the width direction of the felt, specifically, at the outer region from the vicinity of the end of the paper making width on which the wet paper web is placed. It is assumed that this occurs because there is little water functioning as a lubricant, and the loop is cut when the wear of this loop progresses, so wear at both ends is remarkable even when the central part in the width direction is still usable. For this reason, problems such as running out of the trunk at the seam occur.

  In order to deal with such a problem of loop wear, the above-mentioned conventional technique has an effect of suppressing the loop wear to some extent by the yarn added in the vicinity of the loop, but the loop that occurs remarkably at the end in the width direction. There was a disadvantage that it was not possible to effectively suppress wear.

  The present invention has been devised to solve such problems of the prior art, and its main purpose is to suppress the wear of the loop that occurs remarkably at the end in the width direction, thereby extending the life. It is an object of the present invention to provide a felt with a seam for papermaking configured to be able to achieve the above.

  In order to solve such a problem, in the present invention, as shown in claim 1, in a felt with a seam for papermaking, which has a base fabric in which a loop for end joining is formed at the folded portion of two warps. In addition, it has a partial protection weft that is provided so as to pass through the running surface side of the loop and extends only to the high wear region at both ends in the width direction.

  According to this, it is possible to suppress wear on the running surface side of the loop, which occurs remarkably in the high wear region at both ends in the width direction, by the partial protection wefts, and even if the center portion in the width direction is still usable, both ends It is possible to avoid the inconvenience that cannot be used due to the remarkable wear of the part, and to extend the life of the felt.

  In addition, since there is no partial protection weft in the other areas except for the high wear area at both ends in the width direction, adding a thread near the loop greatly clogs the air permeability of the seam. It is also possible to avoid problems such as the occurrence of seams and dirt, and the occurrence of seam marks because the physical properties of the ground are significantly different.

  In the felt with a seam for papermaking, as shown in claim 2, the proportion of the partial protection wefts located on the running surface side of the lower yarn of the two warps is on the papermaking surface side of the lower yarn. It can be set as the structure provided so that it might get entangled with the said lower thread | yarn in the entanglement form which becomes larger than the ratio which is located.

  According to this, the running surface side of the loop can be protected at a high rate by the partial protection weft, and the wear suppression effect can be further enhanced.

  In this case, it is preferable that the partial protection wefts are woven with an n / 1 structure passing through the paper surface side of one lower thread after passing through the running surface side of n (n = 2 or more) lower threads. It is.

  In the felt with a seam for papermaking, as shown in claim 3, the felt includes at least two partial protection wefts, one of which is always in the high wear region. It can be set as the structure provided so that it might be entangled with the said lower thread in the entanglement form which is located in the running surface side of the lower thread among two warps.

  According to this, the running surface side of the loop can be entirely protected by the partial protection weft, and the wear suppression effect can be further enhanced.

  In the felt with a seam for papermaking, as shown in claim 4, the felt includes at least two partial protection wefts, and one of the partial protection wefts is entangled with a lower thread of the two warps. And the other partial protection weft is provided so that the partial protection weft is entangled with the partial protection weft at a position where the one partial protection weft passes the traveling surface side of the lower thread. it can.

  According to this, since the other partial protection weft is always located on the traveling surface side of the lower thread, this partial protection weft can entirely protect the traveling surface side of the loop, and the wear suppression effect is further enhanced. Can be increased.

  In the felt with a seam for papermaking, as shown in claim 5, the felt further includes an overall protective weft that is provided so as to pass through the running surface side of the loop and extends to the full width in the width direction. it can.

  According to this, it is possible to suppress the wear of the loop in other areas excluding the high wear area, and it is possible to extend the life when used in a severely worn application depending on the part or structure of the paper machine. .

  In the felt with a seam for papermaking, as shown in claim 6, the partial protection weft and the whole protection weft are always traveled by the lower thread of the two warps in a high wear region. It can be set as the structure provided so that it might get entangled with the said lower thread | yarn by the entanglement form which is located in the surface side.

  According to this, the running surface side of the loop can be entirely protected by the partial protection wefts and the overall protection wefts, and the wear suppression effect can be further enhanced.

  In the felt with a seam for papermaking, as shown in claim 7, the whole protection weft is provided so as to be entangled with a lower one of the two warps, and the partial protection weft is provided with the whole protection. A configuration may be adopted in which the working weft is entangled with the whole protecting weft at a position passing the running surface side of the lower thread.

  According to this, since the partial protection weft is always located on the traveling surface side of the lower thread, the traveling surface side of the loop can be totally protected by the partial protection weft, and the wear suppression effect can be further enhanced. it can.

  Further, in the present invention, as shown in claim 8, in the felt with a seam for papermaking having a base fabric in which a loop for end joining is formed at a folded portion of two warp yarns, the loop passes through the running surface side of the loop. And has an overall protective weft extending across the entire width in the width direction, and the entire protective weft is a lower thread of the two warps in the high wear region at both ends in the width direction. It was provided so as to be entangled with the lower thread in an entangled form in which the ratio located on the running surface side is larger than that in other areas excluding the high wear area.

  According to this, it is possible to effectively suppress wear on the running surface side of the loop, which occurs remarkably in the high wear region at both ends in the width direction, by the overall protective weft, and the center portion in the width direction can still be used. Even in this state, it is possible to avoid the inconvenience of being unable to use because the wear at both ends is remarkable, and to extend the life of the felt.

  In this case, the overall protective weft has an n / 1 structure that passes through the paper surface side of one lower thread after passing through the running surface side of n (n = 1 or more) lower threads, and is lowered in the high wear region. A configuration in which the number n of yarns continuously passing on the traveling surface side of the yarn is woven in a manner larger than the other regions is preferable.

  In the present invention, as shown in claim 9, in a felt with a papermaking seam having a base fabric in which a loop for end joining is formed at a folded portion of two warp yarns, the loop passes through the papermaking surface side of the loop. And having partial protection wefts extending only in the high wear regions at both ends in the width direction.

  According to this, it is possible to suppress wear on the paper-making surface side of the loop, which occurs remarkably in the high wear region at both ends in the width direction, by the partial protective wefts, and even if the center portion in the width direction is still usable, both ends It is possible to avoid the inconvenience that cannot be used due to the remarkable wear of the part, and to extend the life of the felt.

  In addition, since there is no partial protection weft in the other areas except for the high wear area at both ends in the width direction, adding a thread near the loop greatly clogs the air permeability of the seam. It is also possible to avoid problems such as the occurrence of seams and dirt, and the occurrence of seam marks because the physical properties of the ground are significantly different.

  In the felt with a seam for papermaking, as shown in claim 10, the felt includes a whole protective weft that is provided so as to pass through the papermaking surface side of the loop and extends to the full width in the width direction. it can.

  According to this, it is possible to suppress the wear of the loop in other areas excluding the high wear area, and it is possible to extend the life when used in a severely worn application depending on the part or structure of the paper machine. .

  The partial protection weft may be formed by weaving the base fabric in a state of being woven in advance over the entire width, and then removing the portion of the other region except the high wear region. It is also possible to sew the partial protection wefts only in the high wear area after weaving the base fabric in the absence.

  As described above, according to the present invention, it is possible to suppress the wear on the running surface side of the loop, which occurs remarkably in the high wear region at both ends in the width direction, by the partial protection wefts, and the center portion in the width direction is still used. Even in a possible state, it is possible to avoid the inconvenience of being unable to be used because the wear on both ends is remarkable, and to extend the life of the felt.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view in the length direction showing an example of a felt with a seam according to the present invention. This felt 1 is formed by laminating a nonwoven fabric layer 3 on a base fabric 2, and the base fabric 2 is a double woven fabric in which wefts 6 are entangled with a pair of warps 4 and 5. The loops 9 for forming the end portions are formed at both ends 7 and 8 in the length direction by folding the yarns that form the warp yarns 4 and 5, respectively, and are alternately meshed so that their center holes are aligned with each other. The both ends 7 and 8 are joined by inserting the joining core wire 10 in the width direction through the formed common hole.

  The warps 4 and 5 are monofilament yarns made of a synthetic resin material such as polyamide. Similarly, the weft yarns 6 are monofilament yarns made of a synthetic resin material such as polyamide.

  The base fabric 2 is woven using warp yarns 4 and 5 on the paper machine as driving yarns on the loom, and the weft yarns 6 on the paper machine are warp yarns (warping yarns) on the loom and are driven into the core material for loop formation. A loop 9 is formed by entwining the yarn.

  The loop 9 is formed into a curved shape formed by folding back the warp yarns 4 and 5, and a protective weft 11 for protecting the lower side (running surface 13 side) of the loop 9 is formed at the base of the loop 9. The protective weft 11 is woven so as to be entangled with the lower thread 5 on the running surface side of the two warps 4 and 5 forming the loop 9.

  The protective weft 11 is a twisted monofilament and multifilament made of a synthetic resin material such as polyamide. The yarn material used for the protective weft 11 is not limited to this, and a spun yarn, a multifilament yarn, a monofilament yarn, a monofilament yarn, and the like can be used. A thread material may be used. Further, the material of the protective weft 11 is not particularly limited, and a material excellent in wear resistance other than polyamide may be appropriately selected. The same applies to the protection wefts (partial protection wefts and overall protection wefts) in the following examples.

  The upper side of the loop 9 (on the papermaking surface 14 side) has a form in which the non-woven fiber layer 3 on the end 7 side located on the front side in the running direction is protruded toward the end 8 while being hung in the paper machine. Covered with a flap 15.

  FIG. 2 is a plan view of the felt 1 shown in FIG. This felt 1 is used in a press part (squeezing / watering part) of a paper machine, and wet paper sent from a wire part (dehydration part) in the previous stage is transferred at the paper making width shown in the drawing, Lubricating in a suction box that sucks and dehydrates moisture, a press roll that depressurizes and dehydrates moisture in wet paper, with the suction width and press width shown in the figure, and in the outer region (high wear region) from near the edge of the paper making width Since there is little water functioning as an agent, significant wear occurs on the running surface side of the loop 9 in the seam portion due to friction with the suction box and the press roll.

  FIG. 3 is a schematic cross-sectional view in the width direction of the base fabric 2 shown in FIG. Here, the protective wefts (partial protective wefts) 11 extend only to the high wear regions at both ends in the width direction of the base fabric 2. The protective weft 11 can be formed by weaving a base fabric in a state where it has been woven in advance over the entire width as a warp yarn, and then removing a portion of a region other than the high wear region (low wear region). it can. Alternatively, the partial protection weft may be sewn into the high wear area after weaving the base fabric without the partial protection weft.

  In particular, in the example shown in FIG. 3A, the protective weft 11 is woven in a plain weave that floats and sinks for each one of the lower threads 5. In the example shown in FIG. 3B, the protective weft 11 is in an entangled form in which the ratio of the lower thread 5 located on the lower side of the lower thread 5 is larger than the ratio of the lower thread 5 positioned on the upper side (papermaking side). It is provided so as to be entangled with the lower thread 5. Specifically, the protective wefts 11 are woven in an n / 1 structure passing through the lower side of one lower thread 5 after passing through the lower side of n lower threads 5 (here, n = 3).

  In the example of FIG. 3A, the protective weft 11 is positioned below the lower thread 5 at a ratio of 1/2, whereas in the example of FIG. 3B, n / n + 1 (here, 3 / 4), the protective weft 11 is positioned below the lower thread 5, and the ratio of the protective weft 11 positioned below the lower thread 5 is larger than in the example of FIG. In addition, the wear suppression effect can be further enhanced.

  FIG. 4 is a cross-sectional view in the length direction showing another example of a felt with a seam according to the present invention. In the felt 41, as in the above example, the loop 9 for joining the end portions is formed at the folded portion of the two warps 4 and 5 constituting the base fabric 42. In order to protect the side (running surface 13 side), the first and second two protective wefts 43 and 44 are arranged in the length direction at the base of the loop 9. Both 44 are woven so as to be entangled with the lower thread 5.

  5 and 6 are schematic cross-sectional views in the width direction of the base fabric 42 shown in FIG. In the example shown in FIG. 5, both the first and second protective wefts (partial protection wefts) 43 and 44 extend only to the high wear areas at both ends in the width direction of the base fabric 42. On the other hand, in the example shown in FIG. 6, the first protective weft (partial protective weft) 43 extends only in the high wear region, and the second protective weft (overall protective weft) 44 is the base fabric 42. Extends to the full width.

  In particular, in the example shown in FIG. 5A, the first and second protective wefts 43 and 44 are both woven in a plain weave, and the two protective wefts 43 and 44 are intertwined with the lower thread 5. Is vertically symmetrical. In the example shown in FIG. 5 (B), the first and second protective wefts 43 and 44 both pass through the lower side of n (here, n = 3) lower yarns 5 and then one lower yarn. In this two protective weft threads 43 and 44, the entanglement position with respect to the lower thread 5 is shifted in the width direction.

  In the example of FIGS. 5A and 5B, since either one of the first and second protective wefts 43 and 44 is always located below the lower thread 5 in the high wear region, the protective weft 43 and 44 can protect the running surface side of the loop 9 as a whole, and the wear suppression effect can be further enhanced. In particular, in the example of FIG. 5B, since there are locations where the two protective wefts 43 and 44 are both located below the lower yarn 5 in the high wear region, the wear suppression effect can be further improved.

  In the example shown in FIG. 6A, similarly to the example of FIG. 5A, the first and second protective wefts 43 and 44 are woven together in a plain weave and two protective wefts 43 and 44 are used. Thus, the entanglement form with respect to the lower thread 5 is vertically symmetrical.

  In the example shown in FIG. 6B, the first protective weft 43 is woven in a plain weave, but the second protective weft 44 is woven in an n / 1 structure (here, n = 3). . In the example shown in FIG. 6C, the first protective weft 43 is woven with an n / 1 structure, and the second protective weft 44 is plain weave, contrary to the example of FIG. 6B. It is woven. In the example shown in FIG. 6D, the first and second protective wefts 43 and 44 are both woven in an n / 1 structure. In the example of FIGS. 6B to 6D, the positions passing through the upper side of the lower thread 5 by the two protective wefts 43 and 44 are shifted.

  In the example of FIGS. 6A to 6D, since one of the first and second protective wefts 43 and 44 is always located below the lower thread 5 in the high wear region, the protective weft 43 and 44 can protect the running surface side of the loop 9 as a whole, and the wear suppression effect can be further enhanced. In particular, in the example shown in FIGS. 6B to 6D, since there are portions where the two protective wefts 43 and 44 are located below the lower yarn 5 in the high wear region, the wear suppression effect is further improved. Furthermore, in the example of FIG. 6D, since there are many places where the two protective wefts 43 and 44 are located below the lower thread 5, the highest wear suppression effect can be obtained. it can. In the examples of FIGS. 6B and 6D, since the ratio of the protective weft 44 positioned below the lower thread 5 in the low wear region increases, the wear suppression effect in the low wear region can be enhanced. it can.

  As shown in FIG. 5, in a configuration in which two protective wefts both extend only in the high wear region, one protective weft is plain woven as in the examples of FIGS. 6B and 6C. Thus, a configuration in which the other protective weft is woven in an n / 1 structure is also possible.

  FIG. 7 is a sectional view in the length direction showing another example of the felt with seam according to the present invention. In the felt 71, as in the above example, the loop 9 for joining the end portions is formed at the folded portion of the two warps 4 and 5 constituting the base fabric 72, and the lower side of the loop 9 (the running surface 13). The first and second protective wefts 73 and 74 are provided at the base of the loop 9 in order to protect the side), but here, the first protective weft 73 is attached to the lower thread 5. Whereas the second protective weft 74 is provided so as to be entangled, the first protective weft 73 is entangled with the first protective weft 73 at a position where the first protective weft 73 passes below the lower thread 5. The second protective weft 74 is not entangled with the lower thread 5 and is always positioned below the lower thread 5.

  8 and 9 are schematic cross-sectional views in the width direction of the base fabric shown in FIG. In the example shown in FIG. 8, the first and second protective wefts (partial protection wefts) 73 and 74 both extend only to the high wear areas at both ends in the width direction of the base fabric 72. On the other hand, in the example shown in FIG. 9, the first protective weft (full protective weft) 73 extends over the entire width of the base fabric 72, and the second protective weft (partial protective weft) 74 is in the high wear region. Only extends to.

  In particular, in the example shown in FIG. 8A, the first protective weft 73 is woven in a plain weave, and the second protective weft 74 is arranged so that the first protective weft 73 is below the lower thread 5. It is sewn so as to be entangled with the first protective weft 73 at the passing position. In the example shown in FIG. 8B, the first protective weft 73 passes through the lower side of the lower yarn 5 of n (here, n = 3) and then passes over the upper side of one lower yarn 5 n / The second protective weft 74 is sewn so as to be entangled with the first protective weft 73 at a position where the first protective weft 73 passes below the lower thread 5. Yes.

  In the example shown in FIGS. 8A and 8B, the second protective weft 74 is always located below the lower thread 5 in the high wear region. The running surface side can be protected as a whole, and the wear suppression effect can be further enhanced. In particular, in the example of FIG. 8B, since there are many places where the two protective wefts 73 and 74 are located below the lower thread 5, a high wear suppression effect can be obtained. Since the number of intertwined portions of the second protective weft 74 with respect to the protective weft 73 is reduced, the number of manufacturing steps for sewing the second protective weft 74 can be reduced.

  In the example shown in FIG. 9A, as in the example of FIG. 8A, the first protective weft 73 is woven in a plain weave and the second protective weft 74 is the first protective weft. 73 is sewn so as to be entangled with the first protective weft 73 at a position passing under the lower thread 5. In the example shown in FIG. 9B, as in the example of FIG. 9A, the first protective weft 73 is woven in a plain weave, whereas the second protective weft 74 is The number of entangled portions with respect to one protective weft 73 is smaller than in the example of FIG.

  In the example shown in FIG. 9C, as in the example of FIG. 8B, the first protective weft 73 is woven with an n / 1 structure (here, n = 3) and the second protective weft 73 The weft 74 is sewn so as to be entangled with the first protective weft 73 at a position where the first protective weft 73 passes below the lower thread 5. In the example shown in FIG. 9D, as in the example of FIG. 9C, the first protective weft 73 is woven in an n / 1 structure and the second protective weft 74 is the first protective weft 74. Although it is sewn so as to be entangled with the weft 73 for use, the entanglement position of the second protective weft 74 with respect to the first protective weft 73 is different from the example of FIG. 9C.

  In the example of FIGS. 9A to 9D, since the second protective weft 74 is always positioned below the lower thread 5 in the high wear region, the second protective weft 74 causes the loop running surface. The side can be protected as a whole, and the wear suppression effect can be further enhanced. In particular, in the example of FIGS. 9C and 9D, since there are many locations where the two protective wefts 73 and 74 are both located on the lower side of the lower yarn 5, a high wear suppression effect can be obtained. . In the example of FIGS. 9B to 9D, since the number of entangled portions of the second protective weft 74 with respect to the first protective weft 73 is reduced, the second protective weft 74 is sewn. Manufacturing man-hours can be reduced.

  As shown in FIG. 8, in the configuration in which the two protective wefts extend only in the high wear region, the other protective weft with respect to one protective weft is the same as the example of FIG. 9B. A form in which the number of intertwined portions is reduced is also possible. Similarly to the example of FIG. 9D, a form in which the entanglement portion of the other protective weft with respect to the one protective weft is shifted is also possible.

  FIG. 10 is a schematic cross-sectional view in the width direction of a base fabric showing another example of felt with seam according to the present invention. Here, as in the above example, the end joining loop 9 is formed at the folded portion of the two warps 4 and 5 constituting the base fabric 101, and the lower side (running surface side) of the loop 9 is formed. In order to protect, a protective weft 102 is provided at the base of the loop 9, and this protective weft (overall protective weft) 102 extends to the entire width of the base fabric 101 in the width direction. Entanglement to the lower thread 5 in an entangled form in which the ratio of the lower thread 5 located on the lower side of the high wear area at both ends is larger than that in other areas (low wear area) excluding the high wear area Is provided. In addition, the state of the cross section of the base fabric 101 in the length direction is the same as the example of FIG.

  In particular, in the example shown in FIG. 10 (A), the protective weft 102 passes over the lower side of n (here, n = 3) lower threads 5 in the high wear region and then the upper side of one lower thread 5. In the other region (low wear region) excluding the high wear region, it is woven in a plain weave. In the example shown in FIG. 10B, the protective weft 102 is woven with an n / 1 structure (here, n = 7) in the high wear region, and the running surface of the lower yarn 5 in the low wear region. It is woven with an n / 1 structure (here, n = 3) in which the number n continuously passing through the side is smaller than the high wear region.

  In the example of FIGS. 10A and 10B, the ratio of the protective weft yarn 102 located below the lower thread 5 in the high wear region is larger than that in the low wear region, and the loop is generated remarkably in the high wear region. The wear on the running surface side 9 can be effectively suppressed by one protective weft 102 extending over the entire width in the width direction of the base fabric 101.

  FIG. 11 is a sectional view in the length direction showing another example of the felt with seam according to the present invention. In the felt 111, as in the above example, the loop 9 for joining the end is formed at the folded portion of the two warps 4 and 5 constituting the base fabric 112, and the lower side of the loop 9 (the running surface 13). In order to protect the side), the protective weft 113 is woven so as to be entangled with the lower thread 5, but here, in order to protect the upper side of the loop 9 (the paper making surface 14 side), the protective weft 114 Is entangled with the upper thread 4 on the papermaking surface side of the two warp threads 4,5.

  The protective wefts 114 are provided so as to extend only to the high wear areas at both ends in the width direction of the base fabric 112, as with the protective wefts 11 in the example of FIG. In this case, the protective weft 114 may be provided so as to be entangled with the upper thread 4 in the state where the protective weft 11 in the example of FIG. 3 is turned upside down.

  12 and 13 are schematic cross-sectional views in the width direction of the base fabric showing another example of the felt with seam according to the present invention. In these examples, similarly to FIG. 11, a protective weft for protecting the lower side of the loop 9 and a protective weft for protecting the upper side of the loop 9 are provided.

  In the example shown in FIG. 12A, two protective wefts (partial protection wefts) 121 and 122 extending only in the high wear region are provided to protect the lower side of the loop 9, and the loop 9 In order to protect the upper side, a single protective weft (partial protective weft) 123 extending only in the high wear region is provided. In the example shown in FIG. 12 (B), in contrast to the example of FIG. 12 (A), one protective weft (partial protection weft) 124 that protects the lower side of the loop 9 is provided. Two protective wefts (partial protection wefts) 125 and 126 for protecting the upper side are provided.

  In the example shown in FIG. 12 (C), two protective wefts (partial protection wefts) 127 and 128 extending only in the high wear region are provided to protect the lower side of the loop 9. Are provided with two protective wefts (partial protection wefts) 129 and 130 that extend only in the high wear region, and the lower protective wefts 127 and 128 include n lower yarns. 5 is woven with an n / 1 structure (here n = 3) passing through the upper side of one lower thread 5 after passing through the lower side, and the upper protective wefts 129 and 130 are one upper thread. 1 / n structure (here n = 3) passing through the upper side of the n upper threads 4 after passing through the lower side of 4.

  In the example of FIG. 12A, it is possible to increase the wear suppression effect on the lower side of the loop 9 in the high wear region, while in the example of FIG. 12B, the wear suppression on the upper side of the loop 9 in the high wear region. The effect can be enhanced. Further, in the example of FIG. 12C, since the ratio of the protective wefts 127 to 130 located on the lower side of the lower thread 5 and the upper side of the upper thread 4 is increased, both the upper and lower wear suppression of the loop 9 in the high wear region. The effect can be further enhanced.

  In the examples of FIGS. 12A and 12B, all the protective wefts are woven in a plain weave, and in the example of FIG. 12C, all the protective wefts have an n / 1 structure and 1 / n. Although it is woven by a structure, it is also possible to appropriately combine a plain weave with an n / 1 structure and a 1 / n structure (for example, n = 3, 5, etc.).

  In the example shown in FIG. 13A, a protective weft 131 (partial protective weft) that extends only in the high wear region to protect the lower side of the loop 9 and a protective weft extending over the entire width of the base fabric. (Whole yarn for overall protection) 132 is provided, and in the same manner, a protective weft (partial protection weft) 133 that extends only in the high wear region to protect the upper side of the loop 9 and the entire width of the base fabric are extended. An existing protective weft (overall protective weft) 134 is provided.

  In the example shown in FIG. 13 (B), as in the example of FIG. 13 (A), a protective weft (partial protection weft) that extends only to the high wear region in order to protect the lower and upper sides of the loop 9. 135 and 137 and protective wefts (total protective wefts) 136 and 138 extending over the entire width of the base fabric are provided, but the lower protective wefts 135 and 136 have an n / 1 structure (here, n = 3), and the upper protective wefts 137 and 138 are woven in a 1 / n structure (here, n = 3).

  In the example of FIG. 13 (A), it is possible to increase the wear suppression effect on both the upper and lower sides of the loop 9 in the high wear region, and to obtain the wear suppression effect on both the upper and lower sides of the loop 9 in the low wear region. In the example of FIG. 13B, since the ratio of the protective weft yarns located on the lower side of the lower yarn 5 and the upper side of the upper yarn 4 is increased, the effect of suppressing wear on both the upper and lower sides of the loop 9 in the high wear region is further increased. Further, the wear suppression effect on both the upper and lower sides of the loop 9 in the low wear region can be further enhanced.

  In the example of FIG. 13A, all the protective wefts are woven in a plain weave, and in the example of FIG. 13B, all the protective wefts are woven in an n / 1 structure and a 1 / n structure. However, it is also possible to appropriately combine a plain weave with an n / 1 structure and a 1 / n structure (for example, n = 3, 5, etc.).

  In addition, two protective wefts for protecting the upper side of the loop 9 are provided in the same manner as the protective wefts 73 and 74 in the example of FIG. 7, and the other protective weft is intertwined with the upper thread 4. Are also possible, and in this case, the protective wefts 73 and 74 in the examples of FIGS. 8 and 9 may be provided upside down. Further, it is possible to provide a protective weft that protects the upper side of the loop 9 in the same manner as the protective weft 102 in the example of FIG. 10. In this case, the protective weft 102 is turned upside down. What is necessary is just to provide so that the thread | yarn 4 may be intertwined.

  14 and 15 are schematic cross-sectional views in the width direction of the base fabric showing another example of the felt with seam according to the present invention. In these examples, an additional weft not intended to prevent wear of the loop 9 is provided together with a protective weft for protecting the lower or upper side of the loop 9.

  In the example shown in FIG. 14A, a protective weft 141 (partial protective weft) that extends only in the high wear region is provided to protect the lower side of the loop 9, and the upper side of the loop 9 is protected. Therefore, a protective weft (partial protective weft) 142 extending only in the high wear region is provided. In addition to these protective wefts, the additional weft 143 is entangled with the lower thread 5 so as to be entangled with the entire width of the base fabric. It is woven over. In the example shown in FIG. 14 (B), as in the example of FIG. 14 (A), a protective weft (partial protection weft) that extends only in the high wear region in order to protect the lower side and upper side of the loop 9. 144 and 145 are provided. Contrary to the example of FIG. 14A, the additional weft 146 is woven over the entire width of the base fabric so as to be entangled with the upper thread 4.

  In the example of FIGS. 14A and 14B, the effect of suppressing the wear of both the upper and lower sides of the loop 9 in the high wear region can be obtained, and the physical properties of the seam portion are brought closer to the ground by the additional wefts 143 and 146. Therefore, it is possible to reduce the seam mark caused by the difference in structure between the seam part and the ground part, and the vibration and noise during traveling in the paper machine. In particular, in the example of FIG. 14B, the additional weft 146 is made of a yarn material in which the fibers forming the nonwoven fiber layer are well entangled, that is, an aggregate yarn material in which a large number of either or both staples and filaments are assembled. Then, the nonwoven fiber layer can be firmly held, and the abrasion of the nonwoven fiber layer, in particular, the flap protruding from the nonwoven fiber layer so as to cover the upper side of the loop 9 can be prevented.

  Examples of the yarn made of the aggregate yarn material include a multifilament yarn obtained by bundling a large number of filaments, a spun yarn obtained by spinning staples, and a twisted yarn including at least one of a multifilament yarn and a spun yarn.

  In the example shown in FIG. 15A, one protective weft (partial protection weft) 151 for protecting the lower side of the loop 9 is provided, and two protective wefts for protecting the upper side of the loop 9 ( (Partial protection wefts) 152 and 153 are provided, and additional wefts 154 are woven over the entire width of the base fabric so as to be intertwined with the lower thread 5. In the example shown in FIG. 15B, two protective wefts (partial protection wefts) 155 and 156 extending only in the high wear region are provided to protect the lower side of the loop 9, and the loop 9 Is provided with one protective weft (partial protection weft) 157 that extends only in the high wear region, and an additional weft 158 is entangled with the upper thread 4 so as to be entangled with the full width of the base fabric. It is woven over.

  In the example shown in FIG. 15C, a protective weft (partial protection weft) 159 for protecting the lower side of the loop 9 is provided, and a protective weft (partial protection weft) 160 for protecting the upper side of the loop 9 is provided. Further, two additional weft threads 161 and 162 are woven over the entire width of the base fabric so as to be entangled with the lower thread 5 and the upper thread 4, respectively.

  In the example of FIGS. 15A to 15C, the effect of suppressing the wear of both the upper and lower sides of the loop 9 in the high wear region is obtained, and the seam mark and vibration / noise are suppressed by improving the physical properties of the seam portion, and the non-woven fabric. The effect of suppressing the falling off of the fiber layer can be obtained. In particular, in the example of FIG. 15A, the wear suppression effect on the upper side of the loop 9 in the high wear region is enhanced and the physical properties on the lower side of the seam portion are improved. In the example of FIG. 15 (B), on the contrary, the wear suppression effect on the lower side of the loop 9 in the high wear region is enhanced and the physical properties on the upper side of the seam portion are improved and the non-woven fiber layer is prevented from falling off. In the example shown in FIG. 15C, the physical properties of both the upper and lower sides of the seam portion can be improved and the non-woven fiber layer can be prevented from falling off.

  In the examples of FIGS. 14 and 15, the protective wefts are woven in a plain weave. However, some or all of the protective wefts are n / 1 texture and 1 / n texture (for example, n = 3, 5, etc.). It is also possible to weave with. Further, the additional wefts can be woven with an n / 1 structure and a 1 / n structure (for example, n = 3, 5, etc.) as necessary, similarly to the protective weft.

  In addition, as described above, it is preferable that the protective wefts (partial protective wefts and overall protective wefts) are woven in an n / 1 structure and a 1 / n structure from the viewpoint of enhancing the wear suppression effect of the loop 9. The present invention is not limited to this, and in addition to the plain weave (1/1) as described above, various structures such as a 2/3 structure and an entangled weave (Reno weave) are possible.

  In FIG. 3, FIG. 5, FIG. 6, FIG. 8 to FIG. 10, and FIG. 12 to FIG. The actual thickness is not related to the thickness as shown.

  The felt with a seam for papermaking according to the present invention has an effect of suppressing the wear of the loop that is remarkably generated at the end in the width direction and can extend the life, and by folding back the warp constituting the base fabric. It is useful as a felt with a seam for papermaking in which a loop for end joining is formed, particularly as a press felt used in a press part of a paper machine.

It is sectional drawing of the length direction which shows an example of the felt with a seam by this invention. It is a top view of the felt shown in FIG. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is sectional drawing of the length direction which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is sectional drawing of the length direction which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the width direction of the base fabric which shows another example of the felt with a seam by this invention. It is sectional drawing of the length direction which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric which shows another example of the felt with a seam by this invention. It is typical sectional drawing of the width direction of the base fabric which shows another example of the felt with a seam by this invention.

Explanation of symbols

2, 42, 72, 101, 112 Base fabric 3 Nonwoven fiber layer 4 Warp (upper thread)
5 Warp (lower thread)
6 Weft 9 Loop 11, 43, 44, 73, 74, 102, 113, 114, 121-137, 141, 142, 144, 145, 151-153, 155-157, 159, 160 Protective weft 143, 146, 154 ・ 158 ・ 161 ・ 162 Additional weft

Claims (10)

A felt with a seam for papermaking having a base fabric in which loops for end joining are formed at the turn-back portion of two warps,
A felt with a seam for papermaking, characterized by having a weft for partial protection that is provided so as to pass through the running surface side of the loop and extends only to a high wear region at both ends in the width direction.   The lower yarn is in an entangled form in which the proportion of the partial protection wefts is larger than the proportion of the lower yarns located on the papermaking surface side of the two warps. The felt with a seam for papermaking according to claim 1, wherein the felt is entangled with the felt.   There are at least two partial protection wefts, and one of the two partial protection wefts is always located on the running surface side of the lower yarn of the two warps in the high wear region. The felt with a papermaking seam according to claim 1 or 2, wherein the felt is entangled with the lower thread.   At least two partial protection wefts, one of the partial protection wefts is provided so as to be entangled with a lower one of the two warps, and the other partial protection weft is the one of the ones The felt with a seam for papermaking according to claim 1 or 2, wherein the partial protection weft is provided so as to be entangled with the partial protection weft at a position passing the running surface side of the lower thread.   The papermaking seam according to any one of claims 1 to 4, further comprising an overall protection weft provided so as to pass through the running surface side of the loop and extending in the entire width in the width direction. Felt with.   The partial protection weft and the overall protection weft are in an entangled form such that one of them is always located on the running surface side of the lower yarn of the two warps in the high wear region. The felt with a seam for papermaking according to claim 5, wherein the felt is entangled.   The overall protective weft is provided so as to be entangled with the lower yarn of the two warps, and the partial protective weft is located at a position where the overall protective weft passes the running surface side of the lower yarn. The felt with a seam for papermaking according to claim 5, wherein the felt is provided so as to be entangled with the protective weft. A felt with a seam for papermaking having a base fabric in which loops for end joining are formed at the turn-back portion of two warps,
The loop is provided so as to pass the running surface side of the loop, and has an overall protection weft extending in the entire width direction, and the entire protection weft is the two in the high wear region at both ends in the width direction. The ratio of the warp yarn located on the running surface side of the lower yarn is provided so as to be entangled with the lower yarn in an entangled form in which it is larger than other regions excluding the high wear region. Felt with seam for papermaking. A felt with a seam for papermaking having a base fabric in which loops for end joining are formed at the turn-back portion of two warps,
A felt with a seam for papermaking, characterized by having a weft for partial protection that extends only in a high wear area at both ends in the width direction, and is provided so as to pass through the papermaking surface side of the loop.   The felt with a seam for papermaking according to claim 9, further comprising an overall protective weft provided so as to pass through the papermaking surface side of the loop and extending over the entire width in the width direction.

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