JP4731282B2 - Sheet connector - Google Patents

Description

  The present invention relates to a connector for a sheet represented by a construction sheet such as a paint net, a flameproof sheet, a soundproof sheet, a dustproof sheet, a safety net, and a mesh sheet used at a construction site.

  Conventionally, a number of building construction sheets have been stretched around the construction site and connected in a plane to prevent harm from falling objects, scattering of paint and dust, or leakage of noise, etc. Yes. This connection is made by providing eyelets on each side of the building construction sheet and inserting a rope through the eyelets.

  The eyelet has a hole in the end of a sheet for construction work, and the inner periphery of this hole is reinforced with metal fittings. Therefore, in the case of a building construction sheet made of a knitted fabric, the constituent fibers are cut at the positions of the holes, and the strength in the vicinity of the holes is reduced. In addition, when a strong force is applied to the rope inserted through the eyelet, the metal fitting may come off.

  For this reason, it has been proposed to use a Russell knitting structure at the end of the knitted material, which is the material for the building construction sheet, and use this hole instead of the eyelet (Patent Document 1). In addition, as an eyelet member to be separately attached to a building construction sheet, a material using a knitted fabric as a material and a hole provided in place of the eyelet by a knitted fabric structure has been proposed (Patent Document 2).

Japanese Patent Laid-Open No. 4-209268 (first page, claims) JP 2001-227124 A (page 2, claims and paragraph number 0013)

  Since what is described in Patent Documents 1 and 2 are provided with eyelets by a knitted structure without using metal fittings, the constituent fibers are not cut at the holes. Therefore, strength reduction in the vicinity of the hole can be prevented. Further, since the metal fitting is not used, it is possible to prevent the metal fitting from coming off.

  However, when sheets are connected using eyelets, gaps are inevitably generated at locations where eyelets do not exist. In particular, when a high tension is applied to the sheets, there is a case where a large space is generated at a place where the eyelet does not exist. This is because the sheets are connected only at the part of the eyelet and are not connected at the part where the eyelet does not exist. When such a gap or space is generated, a fallen object or the like may jump out of the gap, or paint, noise, dust, or the like may scatter or leak out.

  Accordingly, the present invention provides a connector that can prevent almost all of the edges of the sheets from being connected and prevent falling objects, paint, noise, dust, etc. from jumping out or leaking out of the construction site. This is a problem.

  In order to connect almost all of the edges of the sheets, it may be considered as follows. That is, as shown in FIG. 1, substantially cylindrical rope insertion holes 2, 2,... Are provided at the respective edges of the sheets 1, 1, and the rope insertion holes 2, 2 of the sheets 1, 1. , ... are engaged. Then, the rope 3 is inserted into the hollow of the substantially cylindrical rope insertion holes 2, 2,. If it does in this way, almost all of each edge of sheet 1 and 1 will be connected, and even if excessive tension is applied to sheets 1 and 1, it is hard to produce a gap and a space in a connection part. In addition, falling objects and paints can be prevented from jumping out or leaking out of the construction site.

  However, since the sheets are generally made of a knitted fabric, the rope insertion holes 2, 2,. This is because, when the rope insertion holes 2, 2,... Are made of hardware, they do not have the same flexibility as the sheets, so that they are not familiar with the sheets, are difficult to handle, and easily fall off. For this reason, the rope insertion holes 2, 2,... Must be made of a knitted fabric. However, when the rope insertion holes are made of a knitted fabric, the hollow is easily crushed, hardly becomes a cylindrical shape, and the rope 3 is difficult to insert. That happened.

  Therefore, the present invention employs a Russell knitting having a specific structure, and the portion in which the rope insertion hole is formed is configured by an insertion yarn made of a specific yarn, so that the substantially cylindrical shape is satisfactorily maintained. It is what I did.

In other words, the present invention is a rope insertion hole forming part composed of at least two belt-like parts A, A knitted with a Russell knitting structure and arranged in parallel, and only an insertion thread connecting the two belt-like parts A, A. B, B,..., And the rope insertion hole forming portions B, B,... Are arranged at predetermined intervals, and constitute each rope insertion hole forming portion B. Sheets characterized in that, as inserted yarns, twisted yarns in which a plurality of monofilaments of 200 to 600 denier are arranged and twisted to give a twist are used. It relates to a connection tool.

  As shown in FIG. 2, the connector according to the present invention includes at least two belt-like portions A and A. The belt-shaped portion A is knitted with an arbitrary Russell knitting structure by the chain knitting yarn 4 and the insertion yarn 5. As the chain knitting yarn 4 and the insertion yarn 5, any yarn may be used, but preferably a monofilament yarn of 1000 to 1500 denier is used. In particular, it is more preferable to use a plurality of, for example, two to three, monofilament yarns of 1000 to 1500 denier. As a material for the monofilament yarn, polyethylene, polypropylene, polyester, or the like can be used.

  The belt-like portions A and A are arranged in parallel, and the two are connected by rope insertion hole forming portions B, B,. And the rope insertion hole forming portions B, B,... The rope insertion hole forming portions B, B,... Are arranged at a predetermined interval. For example, the rope insertion hole forming portions B are arranged at intervals of ten or more courses of the Russell knitted structure. The portion B for forming the rope insertion hole is provided with the insertion yarn 6 inserted in several courses to a dozen courses of the Russell knitting structure. The number of courses in which the rope insertion hole forming part B is formed and the number of courses in which the rope insertion hole forming part B is not formed (the number of courses between the rope insertion hole forming parts B and B) are the number of courses of the latter. It is preferable to make it a little larger. This is because, as will be described later, the rope insertion holes 2 provided in the two sheets 1 and 1 are used so as to mesh with each other (FIGS. 1 and 4). That is, the rope insertion holes 2 of the other sheets 1 are fitted into the portions where the rope insertion holes 2 of one sheet 1 are not formed.

What is characteristic in the present invention is that a specific twisted yarn is used as the insertion yarn 6. By using this specific twisted yarn, a substantially cylindrical rope insertion hole having good shape retention is formed in the rope insertion hole forming portion B. That is, when a rope insertion hole is formed by using a non-twisted yarn as the insertion yarn 6, it is difficult to maintain a substantially cylindrical shape and is liable to be crushed. The reason for this is not clear, but it is considered that when the insertion yarn 6 is a twisted yarn, a torque is applied, so that the rigidity of the insertion yarn 6 itself is increased. This is because if the twist is not applied, no torque is applied to the insertion yarn 6 and only the rigidity of the material of the insertion yarn can be expected.

The filament used for the insertion yarn 6 is a 200-600 denier monofilament . With such a fineness, the rigidity is relatively high and twisting is also easy. The specific twisted yarn used as the insertion yarn 6 is as follows. That is, using a plurality of the monofilaments of 200 to 600 denier, get down twisting over a twisted lower thereto. Next, a plurality of lower twisted yarns are used, and an upper twist is applied to this to form a twisted yarn. By doing so, the specific twisted yarn has high rigidity and can form a substantially cylindrical rope insertion hole having good shape retention.

The number of twists applied to the specific twisted yarn is arbitrary, but is generally about 10 to 100 times / m. As for the number of twists between the lower twist and the upper twist, the lower twist is preferably about 20 to 40 times / m, and the upper twist is preferably about 40 to 80 times / m. Increasing the number of twists of the upper twist compared to the lower twist makes it easier to achieve high rigidity. If the number of twists of the upper twist is 1.5 times the number of twists of the lower twist, higher rigidity is easier to achieve. Most preferred.

The twist direction applied to the upper twist and the lower twist may be S twist or Z twist. For example, both the upper twist and the lower twist may be S twist or Z twist, the upper twist may be Z twist and the lower twist may be S twist, or the upper twist may be S twist and the lower twist may be Z twist. In short, any twist may be used as long as the number of twists and the direction of twisting are appropriately determined and high rigidity can be imparted to the insertion yarn 6.

  As described above, the connecting device according to the present invention includes two band-shaped portions A and A arranged in parallel, and rope insertion hole forming portions B and B each including only an insertion thread connecting the band-shaped portions A and A. The usage method is as follows. That is, it is folded in half with respect to the longitudinal center line of the connector as shown in FIG. Then, since the insertion yarn 6 is formed of a highly rigid twisted yarn, the rope insertion hole forming portion B constituted only by the insertion yarn 6 becomes a substantially cylindrical rope insertion hole 2. Further, the strip-like portions A and A are polymerized with each other. The edges of the sheets 1 are sandwiched between the superposed belt-like portions A and A, and are sewn by sewing or the like. Then, the belt-like portions A and A are sewn and attached to the edge of the sheet 1, and the rope insertion hole 2 extending outward from the edge of the sheet 1 is formed.

  By the above method, the sheet | seat with a connection tool by which the substantially cylindrical rope penetration hole 2 was formed in the outer side of the edge of the sheets 1 is obtained. As shown in FIG. 4, the two sheets with connection tools are opposed so that the rope insertion holes 2 are engaged with each other. And if the rope 3 is inserted in the hollow of the substantially cylindrical rope penetration hole 2 after meshing each rope penetration hole 2, two sheets with a connection tool will be connected. As a result, the two sheets are connected in the state shown in FIG.

  When sheets are connected using the connection tool according to the present invention, the state shown in FIG. 1 is obtained. That is, the rope insertion holes of the two sheets are connected in a state where they are engaged with each other. The rope insertion hole has a hollow hole in the side direction of the sheets, and the rope is inserted into the hole to connect each sheet. Therefore, almost all of the edges of each sheet are connected, and even if an excessive tension is applied to the sheets, it is less likely that a gap or space is generated in the connection portion than when connected by eyelets. Produces an effect. Therefore, when connecting the sheets according to the present invention and using them at construction sites, fallen objects, paint, noise, dust, etc. will jump out or leak out of the construction sites. There is an effect that can be prevented.

The following yarns were prepared:
[Chain knitting yarn 4 used for belt-shaped part]
An aligned yarn obtained by aligning two polyethylene monofilament yarns having a fineness of 1200 deniers was used as a chain knitting yarn 4 used for the belt-shaped portion.
[Insert thread 5 used for belt-shaped part]
An aligning yarn obtained by aligning three polyethylene monofilament yarns having a fineness of 1200 deniers was used as the insertion yarn 5 used for the belt-shaped portion.
[Insert thread 6 used for forming a rope insertion hole]
Nine polyethylene monofilaments having a fineness of 400 denier were used, and this was subjected to 32 twists / m of twist (the twist direction was S twist) to obtain a twisted yarn. Then, two lower twisted yarns were used, and an upper twist of 60 times / m (twisting direction was Z twisted) was applied thereto to obtain a twisted yarn. This twisted yarn was used as the insertion yarn 6 used for the portion for forming the rope insertion hole.

  Using the chain knitting yarn 4, the insertion yarn 5 and the insertion yarn 6 described above, a rope comprising only two strip portions A and A and the insertion yarn 6 connecting the strip portions A and A in the Russell knitting structure shown in FIG. A connecting member for sheets including the insertion hole forming portions B, B,... Was obtained. In addition, as shown in FIG. 3, the rope insertion hole forming portion B is provided with 14 courses, and the distance between the rope insertion hole forming portions B and B is 16 courses.

  The connecting members of the sheets were folded in half along the longitudinal center line, and the edges of the coating net (Russell knitting net) were sandwiched between the belt-like portions A and A, and sewn by sewing. By connecting the connecting members of the sheets in half along the longitudinal center line, a rope insertion hole forming portion B, B,... Can be automatically formed into a substantially cylindrical rope insertion hole. And this rope penetration hole hold | maintains a substantially cylindrical form favorably, Therefore, it was what was easy to insert a rope in the hollow part of a cylinder.

It is the top view which showed the state which connected two sheets using the connection tool of the sheets which concerns on an example of this invention. It is a top view (plan view like a plan view) of a connector for sheets according to an example of the present invention. Fig. 3 shows a Russell knitting structure of the connecting member of the sheets shown in Fig. 2. FIG. 3 is a plan view showing a state in which a connecting device for sheets according to an example of the present invention is sewn to each side of two sheets, and the sewn connecting devices are opposed to each other.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheets 2 Rope insertion hole 3 Rope 4 Chain knitting yarn 4 used for the belt-shaped part A
5 Insertion thread 6 used for the belt-shaped part A 6 Insertion thread 6 used for the part B for forming the rope insertion hole

Claims (8)

Rope insertion hole forming portions B, B,... Formed of at least two strip portions A, A knitted with a Russell knitting structure and arranged in parallel, and only an insertion thread connecting the two strip portions A, A The rope insertion hole forming portions B, B,... Are arranged at predetermined intervals, and the insertion yarns constituting each rope insertion hole forming portion B are as follows. A connecting device for sheets, wherein a plurality of lower twisted yarns obtained by arranging a plurality of monofilaments of 200 to 600 denier and twisting them are used.   The connecting device for sheets according to claim 1, wherein the twisted yarn is obtained by applying an upper twist using two to three lower twisted yarns. The connecting device for sheets according to claim 1 or 2, wherein the number of twists of the lower twist is 20 to 40 times / m, and the number of twists of the upper twist is 40 to 80 times / m. The connecting device for sheets according to claim 1 or 2, wherein the number of twists of the upper twist is 1.5 times or more of the number of twists of the lower twist. The connecting device for sheets according to any one of claims 1 to 4, wherein the upper twist is a Z twist and the lower twist is an S twist.   The connecting device for sheets according to any one of claims 1 to 5, wherein a monofilament yarn of 1000 to 1500 denier is used as the chain knitting yarn and the insertion yarn constituting the belt-like portion A.   7. The connecting device for sheets according to claim 6, wherein as the chain knitting yarn and the insertion yarn constituting the belt-shaped portion A, an aligning yarn obtained by aligning a plurality of monofilament yarns of 1000 to 1500 denier is used. .   The connecting device according to any one of claims 1 to 7, wherein the connecting device is a sheet with a connecting device that is sewn to at least one side of the sheet, and the connecting device is configured such that the belt-like portions A and A are superposed. In addition, the belt is folded in half so as to sandwich the edges of the sheets, and the belt-like portions A and A are sewn to the edges of the sheets by sewing or the like to form a rope insertion hole for the connecting device. The parts B, B,... Are sheets with connection tools in which a substantially cylindrical rope insertion hole is formed outside the edges of the sheets by folding the connection tool in half.

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