TWI446885B - Chain belt - Google Patents

Description

Chain belt

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a fastener chain of a zipper that breaks when the excessive lateral pulling force is applied.

In a state where the zipper is closed and the element rows are engaged with each other, if a pulling force is applied in a direction in which the pair of left and right chain belts are pulled apart, the chain cloth or the sprocket may be broken when the specific pulling force is exceeded. At this time, if the chain cloth breaks, repairing the broken chain cloth becomes a difficult task.

On the other hand, in the case where the excessively large tensile force is applied, in the case where the fastener element is broken, it is easier to repair the zipper by replacing the broken fastener element with a new fastener element. In particular, with a large sprocket zipper, the zipper can be repaired by replacing the broken sprocket and installing the repairing sprocket.

Japanese Patent Publication No. Sho 53-71661 (Patent Document 1) discloses a manual injection molding machine for attaching and fixing a new fastener element to a chain lacking a part of a chain element by injection molding. Bring it.

In the manual injection molding machine described in Patent Document 1, the molding die is positioned by the adjacent fastener elements of the missing fastener elements, and the mounting position or the mounting pitch of the fastener elements fixed by the new injection molding can be determined.

In addition, Japanese Patent Publication No. Sho 60-35127 (Patent Document 2) discloses a zipper which greatly increases the attachment of the chain cloth and the sprocket when the sprocket is attached and fixed to the chain cloth by injection molding. For the purpose of strength, the fastener element is attached and fixed to the leg portion of the chain cloth, and has a rapid cooling portion having a thickness of 60% or less of the maximum thickness.

In the slide fastener described in Patent Document 2, a concave portion or the like is formed on the leg portion to promote cooling after injection molding, and voids generated inside the fastener element during cooling are reduced, whereby the attachment strength of the chain cloth and the fastener element can be greatly increased.

Prior technical literature Patent literature

Patent Document 1: Japanese Open Publication No. 53-71661

Patent Document 2: Japanese Patent Publication No. 60-35127

In recent years, it has been known to use a zipper at a joint portion of a fixed net for fish culture. For example, when a fixed net for carp culture is formed, a plurality of nets are formed by using a pull-bond, which facilitates the manufacture or combination of the net, and is easy to repair the net damaged by use.

However, with the growth of squid, after the continuous use of the fixed net for 2 years and 3 years, not only the net itself will be damaged, but also the zipper used for jointing may be damaged. In addition, the zipper used for the joining of such a fixed net uses a tensile force (for example, 250 kg/25 mm).

When an excessively large tensile force is applied to the slide fastener to cause the fastener element attached to the fastener tape to be broken, the manual fastener injection molding machine described in Patent Document 1 can be used to mount and fix the new fastener element to the chain fabric to replace the broken fabric. Chain teeth. However, when the new fastener element is attached and fixed, it is necessary to transport the mesh to the repairing site provided with the mold or the injection molding machine disclosed in Patent Document 1, and it is difficult to easily mount the fixed fastener element in the field or on the ship.

Further, as described in FIG. 2 of Patent Document 1, when the resin-made sprocket is completely detached from the chain fabric, the operation of attaching and fixing the new sprocket to the portion of the missing sprocket can be directly performed, but in the chain. In the case where the tooth is broken in the meshing neck, the leg of the fastener must be removed from the chain cloth before the work of mounting and fixing the new fastener element.

Fig. 14 is a view showing a state in which the fastener element 914 and the chain fabric of the zipper 910 are damaged when a strong lateral pulling force is applied to the previous zipper 910 in the engaged state. The damage state that may have occurred with the previous zipper 910 is explained below.

The zipper 910 has a pair of left and right chain belts 916, 917. The chain belts 916 and 917 are formed by attaching and fixing a plurality of fastener elements 912, 913 and 914 to opposite side edges of the respective chain cloths. In the example shown in Fig. 14, the slider for engaging and disengaging the pair of left and right chain belts 916, 917 is omitted.

If the zipper 910 in the engaged state exerts a transverse pulling force in the left-right direction shown in FIG. 14 and the force is continuously increased, the zipper 910 may be damaged when the maximum lateral pulling force that the zipper 910 can withstand is exceeded. .

As a result of the damage of the zipper 910, first, the sprocket 912, 913, and 914 in the engaged state are broken. If the transverse pulling force applied to the sprocket 912, 913, 914 in the engaged state is continuously increased, the rupture 921 is generally caused by the thin meshing neck portion 78 having the smallest sectional area. The example shown in Fig. 14 shows a state in which the meshing neck portion 78 having a sectional area smaller than the engaging head portion 70 of the fastener element 914 is broken 921.

On the other hand, in the case where the breaking strength of the fastener elements 912, 913, and 914 of the zipper 910 is strong, the chain fabric of the fastener tapes 916 and 917 is broken 920.

However, in the case where the engaging neck portion 78 of the sprocket 914 is broken 921, since the engaging head portion 70 in the engaged state is detached, the possibility that the zipper 910 instantaneously reaches the separated state is increased. If the zipper 910 is in a separated state, the meshing of the nets will be released, thereby causing a significant loss of the cultured fish to escape from the fixed net. Further, the leg portion of the broken sprocket is maintained in a state of being fixed and fixed across the edge of the chain cloth. Therefore, in order to replace the broken sprocket and to fix the new sprocket, it is necessary to first perform the work of removing the broken sprocket.

The work of removing the sprocket from the chain cloth is generally difficult to perform, especially for the sprocket of the zipper used for the joint of the fixed net, and it is particularly difficult to remove the large sprocket with a mounting pitch of about 15 mm to 30 mm.

Further, when the strength of the fastener elements 912, 913, and 914 is increased so that the fastener elements 912, 913, and 914 are not broken, as shown in Fig. 14, the chain cloth is broken 920. If the chain cloth breaks 920, it is necessary to replace the chain belt 917, and such repair is more difficult.

Therefore, it is preferred that the zipper used for the purpose of repairing is not only suitable for the lateral tensile force, but also that the chain cloth does not break and breaks or deforms in a portion other than the meshing neck of the sprocket. Structure. Further, a recessed portion is formed in the leg portion of the slide fastener described in Patent Document 2, and the purpose of forming the recessed portion is to increase the attachment strength of the link fabric and the fastener element by promoting cooling after injection molding. Therefore, when a transverse pulling force is applied to the slide fastener described in Patent Document 2 and the lateral pulling force is gradually increased, the meshing neck portion having a small cross-sectional area is broken and the slide fastener is separated.

The present invention has been made in view of the above problems, and an object thereof is to provide an engaging head and a meshing neck of a broken sprocket even in the case where a lateral force of the breaking strength is applied to break a part of the sprocket. The chain can be maintained in a state of meshing with the sprocket on the opposite side, and the sprocket of the element of the sprocket which does not remain broken.

In order to achieve the above object, the chain belt of the present invention is fixedly mounted with a plurality of fastener elements on opposite side edges of the pair of right and left chain cloths, wherein the fastener element is used as one of the directions perpendicular to the chain cloth surface. When the first surface is the second surface and the other surface is the second surface, the first leg portion is attached and fixed to the first surface side across the edge of the chain cloth, and the second leg is attached and fixed to the second surface side. a meshing neck portion extending from the first and second leg portions toward the opposite side of the fastener element; and an engaging head portion extending from the meshing neck portion in the same direction and protruding in the longitudinal direction of the chain cloth; The minimum cross-sectional area of the engaging neck portion is Sn, and the cross-sectional area of at least a part of the chain width direction of at least one of the first and second leg portions and the cross-sectional area of the cross section parallel to the longitudinal direction of the chain fabric is Sf. Next, the relationship of Sn>Sf is satisfied.

Further, it is preferable that a core portion thicker than the chain cloth is extended on the opposite end edges of the pair of left and right chain cloths; and the first and second leg portions of the fastener element are attached and fixed across the core portion The cross-sectional area Sf is a cross-sectional area parallel to the extended core portion and passing through the surface of the core portion.

Further, in a preferred configuration, the relationship between the cross-sectional area Sn and the cross-sectional area Sf satisfies 0.8 × Sn > Sf.

Moreover, it is preferable that at least one of the first and second leg portions has a sheet portion whose size is thinner than the thickness direction of the meshing neck portion and which reduces the cross-sectional area Sf.

Moreover, it is preferable that the sheet portion is formed in a concave shape on at least one of the first and second leg portions.

Further, it is preferable that the dimension of the longitudinal direction of the sheet portion of the concave shape is formed to be larger than the longitudinal direction of the fastener neck.

Furthermore, it is preferable that a part of the fastener tape including the resin element row is made of metal and is divided into two and a half repairing chain clips in the direction of the front and back of the resin. Stay in the chain cloth, and then screw it to install and fix it on the chain cloth.

According to the chain belt of the present invention, since the minimum sectional area Sn of the engaging neck portion of the fastener element which is arranged at the opposite end edges of the fastener tape and the sectional area Sf of the leg portion are satisfied, the relationship of Sn>Sf is satisfied, and therefore, When a strong lateral pulling force is applied in a direction in which the pair of left and right chain belts are pulled apart from each other, the leg portion having a small sectional area is broken before the meshing neck portion is broken.

When the break occurs at the foot of the sprocket before the neck is engaged, the sprocket will be detached from the previously attached chain cloth. Even if the breakage occurs in the case of the foot, the engaging head and the engaging neck of the sprocket remain in a state of meshing with the element rows of the opposite side. Even if the leg portion of the sprocket is broken, the shape of the engaging head and the engaging neck can be maintained, so that the pair of left and right links can be maintained in mesh with each other. Further, since the sprocket which is not likely to continue to be used due to the breakage of the leg portion of the sprocket is detached from the chain cloth, it is not necessary to perform the work of removing the broken sprocket when the repair of the new sprocket is performed.

Further, in the case where a core portion thicker than the chain cloth is stretched on the opposite end edges of the pair of left and right chain cloths, and the leg portions of the fixed fastener elements are attached across the core portion, the parallel to the chain is extended The cross-sectional area of the core portion of the cloth passing through the core portion is Sf, and when the minimum cross-sectional area of the meshing neck portion is Sn, the relationship of Sn>Sf is satisfied. Thereby, when a transverse pulling force exceeding the breaking strength is applied, the breaking can occur earlier than the meshing neck portion of the sectional area Sn and the leg portion passing through the sectional area Sf of the core portion.

Further, by setting the relationship between the sectional area Sn of the meshing neck portion and the sectional area Sf of the leg portion to satisfy 0.8 × Sn > Sf, it is possible to more reliably cause the fracture to occur earlier than the meshing neck portion of the sectional area Sn. Pass the foot of the cross-sectional area Sf of the core.

Further, since the first or second leg portion is formed into a thin portion which is thinner than the thickness direction of the meshing neck portion and the cross-sectional area Sf is reduced, the strength of the leg portion can be maintained to secure a specific lateral pulling force of the slide fastener, and The fracture can occur earlier than the meshing neck portion of the sectional area Sn and occurs at the foot portion of the cross-sectional area Sf passing through the core.

Further, by forming the sheet portion of the first or second leg portion in a concave shape, even if a small amount of foreign matter adheres to the first or second leg portion, the foreign matter enters the concave shape sheet when the slider is slid. Therefore, the slider can be smoothly slid. It is particularly suitable for use in a case where it is difficult to clean the element rows, for example, when the zipper is used in the sea.

Further, by forming the dimension of the concave-shaped sheet portion in the longitudinal direction of the chain fabric to be larger than the dimension of the longitudinal direction of the meshing neck portion, the breakage can be appropriately caused.

Further, when the resin-made fastener element is broken, it is easy to use a metal-made and two-half repairing fastener element to sandwich the chain cloth and screw it with a screw instead of the broken fastener element. Repair the chain.

Hereinafter, a representative embodiment of a slide fastener to which the fastener tape of the present invention is applied will be specifically described with reference to the drawings.

Fig. 1 is a view showing a use example in which the zipper 10 to which the fastener tapes 16 and 17 of the present invention are applied is applied to the joining of the fixed net 2 for fish culture. 2 is an enlarged plan view showing the vicinity of the zipper 10 in which the nets 4 of the fixed net 2 are joined to each other.

In the embodiment shown in Fig. 1, a plurality of zippers 10 are used for joining the nets 4 constituting the fixed net 2 having a circumference of about 20 m. For example, the fixed net 2 shown in Fig. 1 is used for the culture of squid and has been used continuously for 3 years or more. As shown in FIG. 1 and FIG. 2, by forming a fixed net 2 by joining a plurality of nets 4 using a zipper 10, the manufacture and installation and disassembly of the net 4 and the fixed net 2 can be easily performed, and damage due to use can be easily repaired. Network 4.

Next, the configuration of the slide fastener 10 will be described with reference to Fig. 2 . As shown in FIG. 2, the zipper 10 includes a pair of left and right chain belts 16, 17 and a slider 50. A plurality of fastener elements 12 and 13 are attached and fixed to the opposite side edges of the chain fabric constituting the pair of left and right chain belts 16, 17 so as to be aligned with the core portion 14. The embodiment shown in Fig. 2 shows that the fixed sprocket 12, 13 is attached across the core portion 14 which is thickly extended in the form of the opposite end edges of the chain cloth, but the invention is not limited to the chain cloth. The embodiment in which the opposite end edges form the core portion 14 can also be applied to the fastener elements attached to the chain cloth not including the core portion 14. Mounting the fastener elements 12, 13 across the core 14 extending thickly in the form of opposite ends of the chain cloth

In the state shown in FIG. 2, the slide preventing member 50 is connected to one end of the row of the fastener elements 12, 13 arranged at the opposite end edges of the fastener tapes 16, 17 (the upper end portion in the example shown in FIG. 2). It falls off and limits the stop 18 above its range of movement. Further, at the other end of the row of the fastener elements 13 arranged at one end edge of the fastener tape 17 (the lower end portion in the example shown in Fig. 2), the tail cylinder for preventing the slider 50 from coming off and restricting the movement range thereof is attached and fixed. 19. The upper stopper 18 is connected to each of the respective chain belts 16, 17 and the tail cylinder 19 is attached and fixed only to the side of the chain belt 17.

Further, the other end (the lower end portion in the example shown in Fig. 2) of the row of the fastener elements 12 arranged at one end edge of the fastener tape 16 is connected to the insertion portion which is opened in the tail cylinder 19 Insert the pin 30. Further, as the material of the fastener elements 12 and 13, the tail cylinder 19, and the plug 30, a resin molded article such as polyacetal can be used.

When the slider 50 is lowered in the direction shown in Fig. 2 by the state shown in Fig. 2, the fastener elements 12, 13 in the engaged state are introduced from the engagement opening which is opened toward the lower side of the slider 50. On the other hand, the left and right sprocket teeth 12 and 13 in the separated state are led out from the introduction ports of the right and left openings above the slider 50. If the slider 50 is further lowered, the engagement opening of the slider 50 abuts against the tail cylinder 19 and reaches the lowermost position. In this state, if the chain belt 16 is pulled upward as shown in Fig. 2, the latch 30 is disengaged from the tail cylinder 19, and the left and right chain belts 16, 17 are separated from each other.

When the left and right chain belts 16, 17 in the separated state are rejoined to each other, the engagement opening of the slider 50 is first lowered to abut against the lowermost portion of the tail cylinder 19. Thereafter, the pin 30 fixed to the end edge of the fastener tape 16 is inserted from the introduction port on the left side of the slider 50 shown in Fig. 2, and inserted into the insertion portion of the tail cylinder 19. Thereafter, the slider 50 (moving upward as shown in Fig. 2) is pulled up.

Then, the left and right sprocket teeth 12 and 13 which are in the separated state are introduced from the introduction ports which are opened to the right and left of the upper portion of the slider 50, and the sprocket teeth 12 and 13 which are in the meshing state are led out from the engagement opening of the slider 50. Thus, the separation and joining of the nets 4 to each other can be easily performed. The separation and joining of the nets 4 are relatively simple, and therefore can also be carried out in water.

Next, the configuration of the fastener tapes 16 and 17 of the present invention and the configuration of the fastener elements 12 and 13 arranged at the opposite end edges thereof will be described with reference to Figs. 3 and 4 . Fig. 3 is an enlarged perspective view showing a portion of the fastener tapes 16, 17 shown in Fig. 2 in an engaged state. Figure 4 is an enlarged plan view of the sprocket 12, 13 shown in Figures 2 and 3.

As shown in FIG. 3, the fastener elements 12 and 13 are respectively arranged in the opposite edge of the pair of right and left chain belts 16, 17. A core portion 14 projecting thicker than the chain cloth is extended on the opposite end edges of the chain fabrics constituting the pair of left and right chain belts 16, 17. Further, the fastener elements 12 and 13 are attached and fixed to the fastener fabric in a form that straddles the core portion 14 (the core portion 14 is sandwiched between the front and back sides).

As shown in Fig. 4, the fastener elements 12 and 13 are provided with a leg portion 72U and a leg portion 72D which are attached and fixed to the front and back surfaces of the chain cloth (the first surface and the second surface of the chain cloth) across the edge of the chain cloth (the 1 foot and 2nd foot). In addition, since the state shown in FIG. 3 and FIG. 4 is viewed from the first surface side of the two faces perpendicular to the chain fabrics of the chain belts 16, 17, the leg portion 72D on the second surface side is hidden on the back side. I can't see it.

An engaging neck portion 78 extends from the leg portion 72U and the leg portion 72D to the opposite side fastener elements 13, 12. The engaging head portion 70 is extended from the engaging neck portion 78 to the opposite side sprocket 13, 12 in a convex form. The engaging neck portion 78 is formed in a thinner portion between the leg portions 72U, 72D and the engaging head portion 70. The engaging neck portion 78 is a portion that engages the protruding engaging head portion 70 of the opposite side of the sprocket 13, 12 when engaged, and is engaged with the engaging head portion 70 by the engaging neck portion 78 to withstand the left and right The transverse pulling force in the direction in which the chain belts 16, 17 are pulled apart from each other.

Further, as shown in FIG. 4, from the thinner portion of the engaging neck portion 78 of the sprocket 12, 13 to the leg portions 72U, 72D, two front and rear meshes are extended parallel to the chain cloth on both sides of the engaging neck portion 78. Tab 71. The dimension of the in-frame engaging projection 71 in the longitudinal direction of the chain is larger than the dimension of the leg portions 72U and 72D in the longitudinal direction of the chain. Further, in the center of the top portion of the engaging head portion 70 (in the thickness direction of the end portion on the opposite side to the leg portions 72U, 72D), a front and rear meshing concave portion 73 parallel to the chain cloth is opened. The engagement recess 73 in the crown is engaged with the portion of the front and rear engaging projections 71 of the fastener elements 13, 12 on the opposite side when engaged. When engaged, the crown engaging projections 71 of the opposite side sprocket teeth 13, 12 are fitted into the front and rear engaging recesses 73, thereby resisting the upper thrust applied in the vertical direction (thickness direction) with respect to the chain fabric surface. The sprocket teeth 12, 13 in the engaged state are prevented from deviating from each other in the vertical direction with respect to the chain cloth surface.

In the embodiment shown in Fig. 2 and Fig. 3, a portion of the surface opposite to the surface of the leg portions 72U and 72D is formed with a concave portion 72P having a concave shape in plan view. The sheet portion 72P is formed to reduce the cross-sectional area of the leg portions 72U, 72D in the cross section passing through the core portion 14 which is parallel to the core portion 14 extending over the side edge of the fastener fabric and perpendicular to the fastener fabric.

The cross-sectional shape of the meshing neck portion 78 of the fastener elements 12 and 13 and the cross-sectional shape of the sheet portion 72P will be described below with reference to Figs. 5 and 6 . Fig. 5 is a view for explaining the shape of the V-V cross section of the engaging neck portion 78 shown in Fig. 4 and the sectional area Sn of the engaging neck portion 78. Fig. 6 is a view for explaining the shape of the VI-VI cross section of the leg portions 72U and 72D shown in Fig. 4 and the sectional area Sf of the leg portions 72U and 72D.

As shown in Fig. 5, the section of the engaging neck portion 78 of the sprocket 12, 13 has a length relative to the thickness direction of the sprocket 12, 13 (the direction perpendicular to the chain surface), relative to the length of the core 14. A generally rectangular cross section with a short direction. Further, from the thinner side walls of the engaging neck portion 78, two front and rear engaging projections 71 extend in parallel with the longitudinal direction of the core portion 14. Here, the minimum sectional area of the engaging neck portion 78 shown in Fig. 5 is defined as Sn. In the embodiment shown in Fig. 5, the cross-sectional area parallel to the longitudinal direction of the chain cloth and orthogonal to the surface of the chain fabric surface is shown. However, the present invention is not limited to the cross-sectional area of the cut surface, and the cross-sectional area of the cross-sectional area Sn is as long as It is sufficient to obtain a cross section of the minimum sectional area of the engaging neck portion 78.

Next, the cross-sectional shape of the leg portions 72U and 72D will be described with reference to Fig. 6 . Fig. 6 is a cross section showing the leg portions 72U, 72D which are parallel to the longitudinal direction of the chain cloth and which are orthogonal to the surface of the chain fabric and which pass through the substantially central portion of the core portion 14. In addition, the core 14 shows its appearance rather than a cross section.

As shown in Fig. 6, the cross-sectional shapes of the leg portions 72U and 72D can maintain the rigidity of the leg portions 72U and 72D by setting the both side portions in the longitudinal direction of the core portion 14 of the leg portions 72U and 72D. Further, even when a lateral pulling force is applied to the pair of chain belts 16, 17 in the engaged state, the leg portions 72U, 72D can be prevented from opening and the core portion 14 can be prevented from coming off.

In general, after several years have elapsed after the zipper is sunk into the sea, foreign matter such as seaweed or shellfish is attached thereto to hinder the sliding of the slider, but the zipper 10 of the above-described fastener elements 12 and 13 is formed by The sheet portions 72P of the leg portions 72U, 72D of the sprocket 12, 13 are recessed more than the surfaces of the leg portions 72U, 72D, so that when the slider 50 is slid, foreign matter enters the recess portion, so that it is smooth. The effect of sliding.

A portion of the surface on the open side of the fastener elements 12 and 13 that is attached to the back side of the portion of the fastener fabric across the core portion 14 is formed with a concave-shaped sheet portion 72P. By forming the sheet portion 72P, the cross-sectional area of the leg portions 72U, 72D passing through the surface of the core portion 14 can be reduced. Further, as shown in FIGS. 2 to 4 and 6, a concave-shaped sheet portion 72P is formed on one of the surfaces of the open sides of the fastener elements 12 and 13, and the outer shape of the fastener elements 12 and 13 is maintained in the previous chain. The teeth have the same size, whereby a standard slider can be used as the meshing and separating slider for the fastener elements 12 and 13.

Here, as shown in FIG. 6, when the cross-sectional areas of the leg portions 72U and 72D which are parallel to the longitudinal direction of the fastener fabric are each Sf, the relationship between the cross-sectional area Sn and the cross-sectional area Sn of the meshing neck portion 78 is formed. Sn>Sf is satisfied, whereby when a strong lateral pulling force is applied in a direction in which the pair of left and right chain belts 16, 17 are pulled apart from each other, the foot portions 72U, 72D having a small sectional area occur before the meshing neck portion 78 is broken. The possibility of breakage is increased.

Further, by making the relationship between the sectional area Sn of the meshing neck portion 78 and the sectional area Sf of the leg portions 72U and 72D satisfying 0.8 × Sn > Sf, the meshing neck of the fracture earlier than the sectional area Sn can be more surely made. 78 occurs in the foot portions 72U, 72D of the sectional area Sf.

Further, in addition to the relationship between the above-described sectional area Sf and the sectional area Sn, the dimension of the longitudinal direction of the sheet portion 72P is made larger than the dimension of the longitudinal direction of the engaging neck portion 78, so that it is more suitable for fracture. shape.

In one of the above-described fastener elements 12, 13, the dimension of the longitudinal direction of the leg portions 72U, 72D is 11.8 mm, the dimension of the longitudinal direction of the engaging neck portion 78 is 5.4 mm, and the thickness direction of the fastener elements 12, 13 For the sprocket 12 and 13 having a size of 11.6 mm and a core portion 14 having a thickness of 2.2 mm, Sf = 41 mm ² and Sn = 56 mm ² satisfy the above relationship of 0.8 × Sn > Sf. Further, in order to maintain the attachment strength of the fastener elements 12 and 13, and prevent deformation of the leg portions 72U and 72D, the dimension of the sheet portion 72P in the thickness direction from the chain surface of the leg portions 72U and 72D is formed to be larger than the distance of the sheet portion 72P. The dimension of the surface of the leg portions 72U, 72D in the thickness direction (the depth dimension of the sheet portion 72P). Preferably, if the maximum dimension in the thickness direction of the chain fabric surface from the leg portions 72U, 72D is set to 100%, the depth of the sheet portion 72P at the position is preferably less than 45%, and the thickness of the chain fabric surface is It should be more than 55%. The sectional area Sf and the sectional area Sn can be calculated from the broken sprocket or from any sprocket on the other chain belts 16, 17 different from the broken sprocket.

When the break occurs in the foot portions 72U, 72D prior to the engagement of the neck portion 78, the fastener elements 12, 13 are detached from the previously attached chain cloth. In this state, the meshing head portion 70 and the meshing neck portion 78 of the fastener elements 12 and 13 which are broken at the leg portions 72U and 72D are maintained in a state of meshing with the fastener elements 13, 12 on the opposite side.

Even if the leg portions 72U and 72D are broken, the meshing head portion 70 and the engaging neck portion 78 are maintained in shape, so that the pair of left and right chain belts 16, 17 can be engaged with each other. Further, since the sprocket portions 72U and 72D are broken and the sprocket which cannot be used continuously is detached from the chain cloth, it is not necessary to perform the sprocket 12 to be broken when the new sprocket is repaired and fixed. 13 Demolition work.

The embodiment shown in FIG. 6 is an embodiment in which the sheet portion 72P having a concave shape is formed on both the leg portion 72U and the leg portion 72D. However, the sheet portion 72P is formed on either of the leg portion 72U and the leg portion 72D, and The cross-sectional area Sf of either one of the leg portion 72U and the leg portion 72D is formed to be smaller than the sectional area Sn of the engaging neck portion 78, whereby the fracture may occur earlier than the meshing neck portion 78 of the sectional area Sn and occur at the foot of the sectional area Sf. Part 72U or foot 72D. Moreover, the strength of the fracture is lower than the strength at which the chain is broken.

Thereafter, the fracture state of the fastener elements 12 and 13 which are generated when an excessive lateral pulling force is applied to the pair of left and right chain belts 16, 17 will be described with reference to FIG. Fig. 7 is a perspective view showing a state in which the leg portions 72U of the fastener elements 12 and 13 are broken and the fastener elements 12 and 13 are separated from the fastener tapes 16 and 17. The same components as those shown in FIGS. 3 and 4 are denoted by the same reference numerals, and their description is omitted.

As shown in FIG. 3, when a large lateral pulling force is continuously applied to the pair of left and right chain belts 16, 17 in the engaged state, the leg portion 72U (or the foot portion 72D) formed to have a smaller sectional area Sf is set earlier than The chain of strong breaking strength or the meshing neck 78 having a large cross-sectional area is broken. As a result, the strength of the fastener elements 12 and 13 to the chain cloth is substantially eliminated, so that the fastener elements 12 and 13 are detached from the chain cloth. In the embodiment shown in Fig. 7, at least a part of the leg portions 72U and 72D is formed in a portion having a sectional area Sf. Therefore, the fracture can be more reliably generated in the leg portion of the sectional area Sf.

Next, another embodiment in which the sectional area Sf of the leg portion is made smaller than the sectional area Sn of the engaging neck portion in the fastener element of the slide fastener will be described with reference to Figs.

Fig. 8 is a perspective view showing another embodiment of the fastener elements 112, 113 to which the opposite side edges of the fastener tapes of the fastener tapes 116 and 117 are attached. Fig. 9 is a view showing a meshing state in which the sprocket teeth 112, 113 of the pair of left and right chain belts 116, 117 shown in Fig. 8 are engaged with each other, and is cut at a right angle to the longitudinal direction of the chain belts 116, 117. Sectional view. Fig. 10 is a view for explaining the shape of the X-X cross section of the engaging neck portion 78 shown in Fig. 9 and the sectional area Sn. Fig. 11 is a view for explaining the shape of the XI-XI cross section of the leg portions 172U and 172D shown in Fig. 9 and the cross-sectional area Sf. It is noted that the same reference numerals are given to the parts having the same functions as those of the elements 12 and 13 shown in FIG. 4, and the description thereof is omitted.

As shown in FIGS. 8 and 9, the fastener elements 112 and 113 are provided with a leg portion 172U and a leg portion that are attached and fixed to the front and back surfaces of the chain cloth (the first surface and the second surface of the chain cloth) across the edge of the chain cloth. 172D (1st foot and 2nd foot). In the perspective view shown in FIG. 8, the leg portion 172D on the second surface side is hidden from the back surface and is not observed.

The sheet portion 172P of the leg portions 172U, 172D of the fastener elements 112, 113 is formed to be thinner in a stepwise manner with respect to the meshing neck portion 78 in parallel with the chain cloth. The sheet portion 172P is formed in parallel with the core portion 14 of the side wall of the chain fabric and perpendicular to the chain cloth to reduce the cross-sectional area of the leg portions 172U and 172D passing through the surface of the core portion 14.

The slider 150 which causes the sprocket teeth 112, 113 to be in an engaged state or a separated state with each other is indicated by a broken line in FIG. The slider 150 shown in Fig. 9 is in a state in which the sprocket teeth 112, 113 which are in the meshing state are inserted into each other as viewed from the meshing port side of the slider 150. Inside the slider 150, a sprocket guiding passage for inserting the sprocket 112, 113 is formed by the upper flap 52, the lower flap 53, and the flange 50F. Further, between the flange 50F extending at both end edges of the upper flap 52 and the flange 50F extending from both end edges of the lower flap 53, a chain insertion passage for inserting the fastener is formed. Further, from the center of the upper portion of the upper flap 52 to the upper side shown in Fig. 9, a tab support portion 56 for attaching the tab of the slider 150 is erected.

The cross-sectional shape of the meshing neck portion 78 of the fastener elements 112 and 113 and the cross-sectional shape of the sheet portion 172P will be described below with reference to Figs. 10 and 11 . Fig. 10 is a view for explaining the shape of the X-X cross section of the engaging neck portion 78 shown in Fig. 9 and the sectional area Sn of the engaging neck portion 78. Fig. 11 is a view for explaining the shape of the XI-XI cross section of the leg portions 172U and 172D shown in Fig. 9 and the sectional area Sf of the leg portions 172U and 172D.

As shown in FIG. 10, the section of the engaging neck portion 78 of the sprocket 112, 113 has a length relative to the thickness direction of the sprocket 112, 113 (the direction perpendicular to the chain surface), relative to the length of the core 14. A generally rectangular cross section with a short direction. Further, from the thinner side walls of the engaging neck portion 78, two front and rear engaging projections 71 extend in parallel with the longitudinal direction of the core portion 14. Here, the minimum sectional area of the engaging neck portion 78 shown in Fig. 10 is defined as Sn. In the embodiment shown in Fig. 10, the cross-sectional area parallel to the longitudinal direction of the chain cloth and orthogonal to the surface of the chain fabric surface is shown. However, the present invention is not limited to the sectional area of the cut surface, as long as it is the engaging neck portion 78. The profile of the smallest cross-sectional area is sufficient.

Next, the cross-sectional shape of the leg portions 172U and 172D will be described with reference to Fig. 11 . Fig. 11 is a cross-sectional view showing the leg portions 172U and 172D which are parallel to the longitudinal direction of the fastener fabric and which are orthogonal to the surface of the fastener fabric and which pass through the substantially central portion of the core portion 14. In addition, the core 14 shows its appearance rather than a cross section.

A sheet portion 172P which is thinner than the shape of the meshing neck portion 78 is formed on the surface of the open side of the sprocket 112, 113 which is attached to the back side of the portion where the leg portions 172U and 172D are attached to the core portion 14 across the core portion 14. By forming the sheet portion 172P, the cross-sectional area of the leg portions 172U, 172D passing through the surface of the core portion 14 can be reduced.

Here, as shown in FIG. 11, when the cross-sectional area of the leg portions 172U and 172D parallel to the longitudinal direction of the fastener fabric is Sf, the relationship between the cross-sectional area Sn of the meshing neck portion 78 and the meshing neck portion 78 is satisfied. Sn>Sf, whereby a strong transverse force is applied in a direction in which the pair of left and right chain belts 116, 117 are pulled apart from each other, and the leg portions 172U, 172D having a small cross-sectional area are broken before the meshing neck portion 78 is broken. The possibility is increasing.

Further, by making the relationship between the sectional area Sn of the meshing neck portion 78 and the sectional area Sf of the leg portions 172U and 172D satisfying 0.8 × Sn > Sf, it is possible to more reliably break the meshing neck earlier than the sectional area Sn. The portion 78 occurs in the leg portions 172U and 172D of the sectional area Sf.

When the break occurs at the foot portions 172U, 172D prior to the engagement of the neck portion 78, the sprocket teeth 112, 113 are detached from the previously attached chain cloth. In this state, the meshing head portion 70 and the engaging neck portion 78 of the sprocket teeth 112, 113 where the leg portions 172U, 172D are broken remain in a state of meshing with the sprocket teeth 113, 112 on the opposite side.

Even if the leg portions 172U and 172D of the fastener teeth are broken, the shape of the engaging head portion 70 and the engaging neck portion 78 is maintained, so that the meshing state of the pair of left and right chain belts 116, 117 can be maintained. Further, since the sprocket portions 172U and 172D are broken and the sprocket which cannot be used continuously is detached from the chain cloth, it is not necessary to perform the sprocket 112 to be broken when the new sprocket is repaired and fixed. 113 Demolition work.

In addition, in the embodiment shown in FIG. 10 and FIG. 11, the core portion 14 formed thicker than the chain cloth is extended on the opposite end edges of the pair of right and left chain cloths. However, the present invention is not limited to the core portion 14 having the core portion 14 on the chain cloth. The chain belts 116, 117 can also be applied to a chain belt having a planar chain cloth that does not include the core portion 14.

In addition, the embodiment shown in FIG. 11 is an embodiment in which both the leg portion 172U and the leg portion 172D are formed with the sheet portion 172P. However, the sheet portion 172P is formed on either the leg portion 172U and the leg portion 172D, and the foot is formed. The cross-sectional area Sf of any one of the portion 172U and the leg portion 172D is formed to be smaller than the sectional area Sn of the engaging neck portion 78, whereby the fracture portion may be generated at the foot portion of the sectional area Sf earlier than the meshing neck portion 78 of the sectional area Sn. 172U or foot 172D.

Then, as shown in Fig. 12, when the fastener elements 12 and 13 are detached from the fastener tapes 16 and 17 due to excessive lateral pulling force or the like as shown in Fig. 7, the portions of the fastener elements 12 and 13 are detached. The configuration of the repaired sprocket 212 is reinstalled. Fig. 12 is a view showing a state before the fixing sprocket 212 is attached and fixed to the fastener tapes 16, 17, and shows a cross-sectional view taken along a section perpendicular to the longitudinal direction of the fastener fabric. Moreover, FIG. 13 is a cross-sectional view showing a state in which the repairing sprocket 212 is attached and fixed to the fastener tapes 16, 17. It is noted that the same reference numerals are given to the parts having the same functions as those of the elements 12 and 13 shown in FIG. 4, and the description thereof is omitted.

As shown in FIGS. 12 and 13, the repairing sprocket 212 is divided into two halves of the fastener element in the front and back directions. The two repairing fastener elements 212 shown in FIG. 12 and FIG. 13 are the same shape, but they may be combined with different shapes.

When the repairing sprocket 212 is attached and fixed to the fastener tapes 16, 17, first, the two repairing fastener elements 212 are clamped and positioned from the direction of the fastener fabric by using the clamp at a specific position equal to the fastener tapes 16, 17. Thereafter, a hole for mounting and fixing is opened in the chain cloth, and the screw 210 is inserted into the screw hole 212H of the two repairing sprocket 212 and the hole for mounting and fixing. Thereafter, the two repair sprocket teeth 212 are attached and fixed to the chain cloth by the opposite side lock nut 211. In this way, the repair of the chain belts 16, 17 can be performed simply. This work can also be carried out on a ship that hoists the fixed net 2. Further, as the material of the repairing sprocket 212, a metal such as stainless steel or a copper alloy can be used.

Industrial availability

The use of the chain belt of the present invention is not limited to the use of the fixed nets to each other.

2. . . Fixed network

4. . . network

10,910. . . zipper

12, 13, 112, 113, 912, 913. . . Chain teeth

14. . . Core

16, 17, 916, 917. . . Chain belt

18. . . Upper stop

19. . . Open tail

50, 150. . . Slider

50F. . . Flange

52. . . Upper wing

53. . . Lower wing

56. . . Pull tab support

70. . . Meshing head

71. . . Meshing tabs

72D, 72U, 172D, 172U. . . Foot

72P, 172P. . . Sheet portion

73. . . Meshing recess in the table

78. . . Meshing neck

210. . . Screw

211. . . Nut

212. . . Repairing sprocket

212H. . . screw hole

920. . . fracture

921. . . fracture

Sf. . . Sectional area of the foot of the sprocket

Sn. . . Sectional area of the meshing neck of the sprocket

Fig. 1 is a view showing an example of use for bonding a zipper to a fixed net for fish culture.

Figure 2 is an enlarged plan view showing the vicinity of a zipper joining the nets of the fixed nets to each other.

Fig. 3 is a perspective view showing a part of the chain belt in the engaged state shown in Fig. 2 in an enlarged manner.

Figure 4 is an enlarged plan view showing the sprocket shown in Figures 2 and 3.

Fig. 5 is a view for explaining the shape of the V-V cross section of the engaging neck portion shown in Fig. 4 and the sectional area Sn of the engaging neck portion.

Fig. 6 is a view for explaining the shape of the VI-VI cross section of the leg portion shown in Fig. 4 and the sectional area Sf of the leg portion.

Fig. 7 is a perspective view showing a state in which the fastener element is detached from the fastener tape due to breakage of the leg portion of the fastener element.

Fig. 8 is a perspective view showing another embodiment of the fastener element attached to the opposite side edge of the fastener tape of the fastener tape.

Fig. 9 is a view showing a meshing state in which the sprocket pairs of the pair of left and right chain belts shown in Fig. 8 are engaged with each other.

Fig. 10 is a view for explaining the shape of the X-X cross section of the engaging neck portion shown in Fig. 9 and the sectional area Sn of the engaging neck portion.

Fig. 11 is a view for explaining the shape of the XI-XI cross section of the leg portion shown in Fig. 9 and the sectional area Sf of the leg portion.

Fig. 12 is a cross-sectional view showing a state before the repairing fastener element is attached to the fastener tape.

Fig. 13 is a cross-sectional view showing a state in which the repairing fastener element is attached to the fastener tape.

Fig. 14 is a view for explaining a state of damage which occurs when a strong transverse force is applied to a previous zipper.

12, 13. . . Chain teeth

14. . . Core

16, 17. . . Chain belt

72P. . . Sheet portion

72U. . . Foot

Claims (1)

a chain belt attached to a pair of opposite side edges of a pair of left and right chain cloths respectively fixed with a plurality of sprocket teeth (12, 13), wherein the sprocket (12, 13) is perpendicular to the chain surface When one of the directions is the first surface and the other surface is the second surface, the first leg portion (72U) is attached and fixed to the first surface side across the edge of the chain cloth; a second leg portion (72D) on the second surface side; an engaging neck portion (78) extending from the first and second leg portions (72U, 72D) toward the opposite side fastener elements (13, 12); The engaging neck portion (78) further extends in the same direction and protrudes in the longitudinal direction of the chain cloth (70); wherein, when the minimum sectional area of the engaging neck portion (78) is Sn, the first and the first When at least a part of the width direction of at least one of the leg portions (72U, 72D) and the cross-sectional area of the cross section parallel to the longitudinal direction of the chain fabric are Sf, the relationship of Sn>Sf is satisfied; a core portion (14) formed thicker than the chain cloth at a opposite end edge of the pair of chain fabrics; the first and second leg portions (72U, 72D) of the fastener elements (12, 13) straddle the core portion ( 14) mounted and fixed to the opposite end edge of the chain cloth; the sectional area Sf is parallel to the extended core portion (14) and the cross-sectional area of the surface passing through the core portion (14); Both of the leg portions (72U, 72D) form a sheet portion which is thinner than the dimension of the engaging neck portion (78) in the thickness direction and which reduces the sectional area Sf; and passes through the surface of the core portion (14) Chain length direction of the sheet portion (72P) The size is formed to be larger than the longitudinal direction of the fastener neck (78).