JP2023150090A - Bag body provided with hanging rope for engineering work - Google Patents

Abstract

To provide a bag body provided with hanging rope for engineering work, allowing even an individual inexperienced in rope weaving to strongly joint those through simple joint operation.SOLUTION: Hanging rope 30 comprises hollow stranded rope made of a plurality of strands 31 as a unit, wherein the plurality of strands 31 comprises a bundle yarn of a plurality of monofilament yarns 32 having a twisted surface 31a with irregularity on its peripheral surface, to expose the twisted surface 31a with irregularity to inner and outer peripheral surfaces of the hanging rope 30.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bag for civil engineering work that can be applied to bank protection work, foot protection work, etc., and particularly to a bag for civil engineering work that is equipped with a hanging rope.

This will be explained with reference to FIG. As shown in FIG. 7(A), the civil engineering work bag body 60 includes a net bag body 61 having a drawstring shape, and a hanging rope 70 and a mouth-tying rope 71 assembled around the mouth of the bag body 61. (Patent Document 1).
The bag body 60 for civil engineering work is a structure for civil engineering work produced by inserting filling material 40 such as crushed stone into the inside of the bag body 61, and is used for various civil engineering works.

Since the hanging rope 70 is loaded with a weight of 3 to 8 tons, the hanging rope 70 is made of a twisted rope (generally a three-stranded rope) made of synthetic fibers with excellent tensile strength.
, the hanging rope 70 is endlessly processed using a known short splice (Patent Documents 2 and 3).

To explain the endless processing of the hanging rope 70 made of twisted rope attached to the mesh 62 of the bag body 61, the strands 71 are untwisted over a certain length at both ends of the hanging rope 70 pulled out from the bag body 61. a first step, and a second step of butting the ends of the hanging ropes 70 against each other and braiding the strands 71 on the untwisted side while inserting them between the strands 71 on the hanging rope 70 side using a hand tool called a spikey; After finishing the weaving, a third step is performed in which the untwisted strands 71 protruding from the outer peripheral surface of the hanging rope 70 are cut off.

JP 11-131447 Utility Model Publication No. 2-25592 Japanese Patent Application Publication No. 10-236380

The conventional hanging rope 70 made of twisted rope has the following problems.

<1> Highly skilled techniques are required to perform short splices. Even for a skilled engineer who is accustomed to weaving the hanging rope 70, it takes a lot of time and effort.
<2> If performed by an inexperienced person, not only the number of steps and time required for the weaving work will be doubled, but also variations in connection strength will likely occur.
If there are variations in the weaving of the strands 71, the strands 71 are likely to loosen and come off when the hanging rope 70 is lifted.
<3> In the weaving work of the strands 71, it is difficult to insert sharp spikes into the hanging rope 70 to widen the distance between the strands.
<4> When inserting a sharp spike into the hanging rope 70, the strand is easily damaged, and if the strand is damaged, the strength of the hanging rope 70 will be reduced.
<5> Not only does a difference in diameter occur at the boundary between the connecting portion 72 of the hanging rope 70 and the rope body adjacent to the connecting portion 72, but also the cut ends 73 of the plurality of woven strands 71 It protrudes from the outer peripheral surface of the terminal end (Fig. 7 (B), (C)).
Therefore, when the hanging rope 70 tries to slide through the mesh 62 of the bag body 61 when lifting the hanging rope 70, the steps formed at the boundaries of the connecting parts 72 and the cut ends 73 get caught in the knitted fabric. It cannot slide smoothly.
<6> If the hanging rope 70 is forcibly lifted with the connecting portion 72 of the hanging rope 70 caught in the mesh 62, excessive tension will be applied to some of the hanging ropes 70 and the mooring portion of the knitted fabric, causing the bag body to 61 may break.
<7> When a civil engineering structure is used in the ocean, a kink phenomenon (deformation of the hanging rope 70) is likely to occur in the textile hanging rope 70. In particular, since the three-stranded rope has a single twist, the kink phenomenon is likely to occur.
If a kink phenomenon occurs in the suspension rope 70, the strength of the rope will be significantly reduced, and there is a risk that the suspension rope 70 will break when lifting the civil engineering structure again.

An object of the present invention is to provide a bag for civil engineering work equipped with a hanging rope that can solve the above problems.

In the present invention, a hanging rope is attached to the mouth of a bag body by going around it, a first terminal part and a second terminal part are formed over a certain length at both ends of the hanging rope, and the first terminal part A first overlapping restraint part formed by inserting a part of the second end part into the rope main body of the second end part, and a second overlap restraining part formed by inserting a part of the second end part into the rope main body of the first end part. A bag for civil engineering work comprising a hanging rope in which at least a polymer restraint part is arranged in series and connected to form an endless structure, the hanging rope being woven into a braided or netted form with a plurality of strands as one unit. It is made of a hollow knitted rope, and the plurality of strands are made of a bundle of monofilament yarns having an uneven twisted surface on the circumferential surface, and the uneven twisted surface is exposed on the inner and outer circumferential surfaces of the hanging rope.
In another form of the present invention, one or more of multifilament yarn, taslan yarn, or spun yarn is mixed into a bundle yarn in which the plurality of strands are mainly composed of a plurality of monofilament yarns having an uneven twisted surface on the circumferential surface. It may also be configured by
In another embodiment of the present invention, the bundles of the plurality of monofilament yarns are twisted in the same direction, and untwisting force is applied to the bundles of the plurality of monofilament yarns.
In another embodiment of the present invention, the inner and outer circumferential surfaces of the rope main body constituting the first overlapping restraining portion and the second end portion are in contact with each other via an uneven torsion surface.
In another aspect of the present invention, when a tensile force is applied to the hanging rope, the uneven torsion surfaces formed on the inner and outer circumferential surfaces of the hanging rope become hard.
In another aspect of the present invention, the stitches of the hanging rope are expanded to form first and second introduction ports, and the first or second end portion is inserted into the rope body through the first or second introduction port. It is inserted into.
In another aspect of the present invention, when a tensile force is applied to the hanging rope, the first and second overlapping restraining portions contract in diameter to restrain the inserted first and second end portions.

With the above configuration, the present invention has at least one of the following effects.
<1> The connecting part of the hanging rope does not get caught in the mesh of the bag body, and the connecting part of the hanging rope can exhibit high tensile strength, making it possible to use the braided rope as a hanging rope for structures used in civil engineering work. became.
<2> Since a braided rope with an improved hollow structure can be used as a hanging rope, it is lighter and much more convenient to handle than conventional twisted ropes such as triple ropes.
<3> The hanging ropes can be connected in a short time by simply inserting a portion of both end portions into the rope body.
Therefore, it does not require the skilled skills required to connect conventional twisted ropes.
<4> Since the strands constituting the hanging rope are woven from both clockwise and counterclockwise directions, kinks are less likely to occur compared to conventional three-stranded ropes.

An explanatory diagram of a bag for civil engineering work equipped with a hanging rope according to the present invention Plan view of structure for civil engineering work Illustration of a hanging rope made of braided rope with a part omitted An explanatory diagram of the endless processing method for a hanging rope, (A) is an explanatory diagram of preparation before processing, (B) is an explanatory diagram of the process of inserting the first end into the right rope body, and (C) is an explanatory diagram of the process of inserting the first end into the right rope body. An explanatory diagram of the process of inserting the second terminal part into the left rope body, (D) is an explanatory diagram of the process of completing the insertion of the first and second terminal parts into the corresponding rope bodies An explanatory diagram of the connecting part of the hanging rope inserted through the mesh of the bag body These are explanatory diagrams of the connecting action of the connecting part of the hanging rope, (A) is an explanatory diagram of the connecting part of the hanging rope, and (B) is a model diagram of the connecting part of the hanging rope in the double insertion structure of the present invention. (A) is an explanatory view of the entire civil engineering work bag, (B) is an explanatory view of the connecting part of the hanging rope made of twisted rope, ( C) is a cross-sectional view of C-C in (B)

[Example 1]
1. Bag for civil engineering work on which the invention is based A bag for civil engineering work 10 on which the invention is based will be described with reference to FIGS. 1 and 2.
The bag body 10 for civil engineering work includes at least a bag body 20 made of a net and having a drawstring shape, and a hanging rope 30 of an endless structure that is assembled around the opening 22 of the bag body 20.
Note that the reference numeral 23 in the figure is a tying rope attached to the opening of the bag body 20.
By putting the filling material 40 into the bag body 20, the structure A for civil engineering work can be manufactured.

2. Bag Body The bag body 20 is a bottomed bag made of net fabric and has an opening 22.
As the net fabric for the bag body 20, for example, a very thick raschel net fabric made of double knitted synthetic fiber yarns such as polyester (1500 d/20 threads, strength 100 kgf/2 threads, or breaking elongation 50%) can be used.

The mesh 21 of the net fabric constituting the bag body 20 has a developed shape of a quadrangle or a hexagon, and is uniform throughout.
The mesh 21 is set to a size that prevents the filling material 40 from slipping out, and the typical mesh size is 25 to 50 mm.

3. Hanging Rope The hanging rope 30 is a rope that is attached by passing through the mesh 21 at the mouth of the bag body 20, and after being attached to the bag body 20, both ends of the rope are woven to form an endless structure.
In the present invention, as will be described later, a knitted rope with an improved hollow structure is used as the hanging rope 30.

<1> Reasons why conventional braided ropes have not been used as hanging ropes Generally, braided ropes are made by braiding multiple strands, and are mainly used as a substitute for ship wire ropes.
There has never been an example in which a conventional braided rope has been used as a hanging rope for a bag body 20 that encloses a filling material that is a scour-preventing member.

This is because, when used as a hanging rope, the connecting part of the rope must be connected so that it does not get caught in the mesh of the bag body, and the rope must be connected so that it can withstand the huge hanging load (2 to 10 tons) of the filling material. It is necessary to satisfy two requirements: , and the ability to connect both ends of the rope with high strength.

It has been technically difficult for conventional knitted ropes to satisfy the above two requirements at the same time.
If the connecting part of the hanging rope gets caught in the mesh of the bag body, the problem arises that the net fabric of the bag body is torn during lifting and the filling material is scattered.
Furthermore, if the strength of the connecting portion of the hanging rope is insufficient, there is a risk that the connecting portion of the hanging rope will come undone during lifting, causing the civil engineering structure to fall, leading to a serious accident.
For the above reasons, braided ropes have not been used as hanging ropes for civil engineering structures.

<2> Hanging Rope Made of Braided Rope Used in the Present Invention In the present invention, the configuration of the braided rope is improved to meet the above requirements, and the braided rope is used as the hanging rope 30 of a structure for civil engineering work. made it possible.
The hanging rope 30 is made of a hollow knitted rope in which a plurality of strands 31 are woven into a braided or netted unit.
The strand 31 consists of a bundle of a plurality of monofilament yarns 32.
The hanging rope 30 will be described in detail below with reference to FIG. 3.

<2.1> Monofilament Yarn The monofilament yarn 32 is a single yarn, and compared to multifilament, it has thicker fibers and thus has higher rigidity and hardness.
Basically, the outer peripheral surface of the monofilament yarn 32 is smooth and slippery, but in the present invention, the frictional force of the hanging rope 30 is improved by utilizing the rigidity and untwisting force of the monofilament yarn 32.

<2.2> Material of monofilament yarn The material of the monofilament yarn 32 includes, for example, spun yarn or filament yarn of chemical fibers such as polyarylate, aramid, ultra-high molecular weight polyethylene, polyester, nylon, polyethylene, polypropylene, polyvinyl alcohol, etc. Filament processed yarn can be used.

<2.3> Strand The strand 31 is produced by bundling a plurality of monofilament yarns 32 into a yarn bundle, and is used by twisting (twisting) the entire yarn bundle of these monofilament yarns 32 in a specific direction.

<2.3.1> Strand Twisting Direction The twisting direction (S twist or Z twist) of the plurality of strands 31 is the same for each set of strand units 33.
That is, the twisting direction of the strands 31 is either the opposite combination (normal twist) to the twisting direction of the strand unit 33, or the same combination (rung twist).

<2.3.2> Uneven twisted surface of strand In the present invention, an uneven twisted surface 31a is formed on the peripheral surface of the strand 31.
The reason why the uneven twisted surface 31a is formed on the circumferential surface of the strand 31 is not only to form the outer circumferential surface of the strand 31 into a rough and uneven surface, but also to form a rough surface on the circumferential surface of the strand 31 when a tensile force is applied to the hanging rope 30. This is to harden the uneven twisted surface 31a of the strand 31 to significantly increase the frictional resistance of the strand 31.

For example, when multifilaments are used as strands, even if the multifilaments are twisted, the stiffness is low, so almost no untwisting force (shrinkage force in the axial direction) is generated on the multifilaments, and the outer peripheral surface of the multifilaments is formed as a smooth surface.

In the present invention, the uneven twisted surface 31a is formed on the outer peripheral surface of the strand 31 by twisting the bundled yarn of the monofilament yarn 32.
The object to be twisted is not a single monofilament yarn 32 but an aggregate of a plurality of monofilament yarns 32.
By twisting the bundled yarn of the monofilament yarn 32, knob-shaped protrusions are formed in a spiral shape on the outer peripheral surface of the bundled yarn of the monofilament yarn 32 constituting the strand 31, and these knob-shaped protrusions form irregular irregularities. A twisted surface 31a is formed.

In other words, by twisting the entire strand 31 in a spiral shape, a continuous helical protrusion in the shape of a knob is formed on the outer peripheral surface of the strand 31.
The apparent outer diameter of the sland 31 after the sland 31 is twisted is twice the diameter of the sland 31 alone before twisting.
The concave-convex twisted surface 31a refers to the concave-convex surface formed by spiral protrusions appearing on the surface of the sland 31 whose apparent outer diameter has doubled.

<2.3.3> Principle of formation of uneven twisted surface Since the monofilament yarn 32 has rigidity and hardness, when torque is forcibly applied to the bundle of monofilament yarn 32 and twisted, the monofilament yarn 32 is twisted. An untwisting force acts in the direction opposite to the direction in which the torque is applied by the amount of elastic deformation of the bundled yarn of the yarn 32.
Although a part of the bundled yarn of the monofilament yarn 32 is plastically deformed and has a tendency to twist, untwisting force remains.
The untwisting force (shrinking force in the axial direction) remaining in the bundle of monofilament yarn 32 increases in proportion to the number of twists, and as the number of twists increases, the outer peripheral surface of the bundle of monofilament yarn 32 becomes uneven and twisted. The surface 31a is clearly visible.
The uneven twisted surface 31a is formed over the entire length of the bundle of monofilament yarns 32.
As described above, in the present invention, the untwisting force of the monofilament yarn 32 is utilized to form the irregular uneven twisted surface 31a on the outer peripheral surface of the yarn bundle of the strand 31.

The number of twists of the bundled yarn of the monofilament yarn 32 is the number of times that an irregular uneven twisted surface 31a can be formed on the outer peripheral surface of the bundled yarn of the strand 31.
For practical purposes, for example, when 80 400 d monofilaments are bundled into one monofilament yarn 32, the entire bundle of monofilament yarns 32 is preferably twisted 20 times or more.

<2.4> Strand Unit The hanging rope 30 is composed of multiple sets of strand units 33 each consisting of a plurality of strands 31, and these multiple sets of strand units 33 are woven in two directions: S twist and Z twist.
The number of strands 31 in a set of strands 31 constituting the strand unit 33 can be selected as appropriate, but is preferably in the range of 1 to 12 in practice.
The total number of strand units 33 can be selected as appropriate, but in practice it is 4 to 16.

Since a plurality of strands 31 are exposed on the inner and outer peripheral surfaces of the hanging rope 30 having a hollow structure, a continuous uneven twisted surface 31a is formed on the inner and outer peripheral surfaces of the hanging rope 30.
Furthermore, the hanging rope 30 can be expanded or contracted at any position. By compressing the hanging rope 30 in the axial direction, the diameter is increased and the stitches between the strands 31 are opened, and when the hanging rope 30 is stretched in the direction of separation, the diameter is reduced and the stitches between the strands 31 are closed.

[Manufacturing method of hanging rope]
An example of a method for manufacturing the hanging rope 30 will be described below.
a step of supplying a plurality of monofilament yarns 32; a step of performing the above-described twisting process on the bundled yarns of the plurality of monofilament yarns 32 to produce a strand 31 with irregular uneven twisted surfaces 31a formed on the outer peripheral surface; The hanging rope 30 is mechanically manufactured by performing these multiple steps of weaving multiple sets of strand units 33 made up of multiple strands 31 in parallel.

[How to connect hanging ropes]
Referring to FIG. 4, a method for connecting both ends of the hanging rope 30 that is attached to the opening of the civil engineering bag 10 will be described.

<1> Preparation for connecting hanging ropes Figure 4(A) shows the first and second terminal parts 35a and 35b formed at both ends of the hanging rope 30 before connecting, and the cylindrical insertion tool used in the connecting work. A tool 50 is shown.

The insertion jig 50 has a cylindrical part 51 into which the first and second terminal parts 35a and 35b can be inserted, and a tapered tip part 52 integrally formed at the distal end of the cylindrical part 51. While the first or second end portions 35a, 35b are inserted into the cylindrical portion 51 of the tool 50, the tip portion 52 is inserted into the hanging rope 30 for use.
The insertion jig 50 is an example, and other insertion jigs may be used, or the first and second terminal portions 35a and 35b of the hanging rope 30 may be inserted without using the insertion jig. It can be crowded.

<2> Insertion of the first end portion FIG. 4(B) is an explanatory diagram of the step of inserting the tip of the first end portion 35a of the hanging rope 30 into the middle of the second end portion 35b in the opposite direction.
A first introduction port 36b is formed near the end of the second terminal portion 35b on the right. When the rope body is compressed in the axial direction to expand its diameter, the stitches between the strands open to form an inlet.
A part of the first terminal portion 35a is inserted into the second terminal portion 35b through the first introduction port 36b.
A first overlapping restraining portion 37b is formed in the overlapping range of the second end portion 35b and the first end portion 35a.

<3> Insertion of the second end portion FIGS. 4(C) and (D) are explanatory views of the process of inserting the second end portion 35b of the hanging rope 30 halfway into the first end portion 35a in the opposite direction.
A part of the second terminal part 35b is inserted into the first terminal part 35a through the second introduction port 36a formed near the end of the first terminal part 35a on the left side, and the first terminal part 35a and the second terminal part A second polymerization restraining portion 37a is formed in the polymerization range with 35b.

The connecting portion 34 of the hanging rope 30 has a structure in which first and second terminal portions 35a and 35b are both inserted into the rope body.
Therefore, in the connecting part 34, the first polymerization restraint part 37b and the second polymerization restraint part 37a are located in series, and the first and second polymerization restraint part 23a are located between the first and second polymerization restraint parts 37a, 37b. , 23b are exposed.

As described above, the simple task is to insert the ends of the first and second terminal parts 35a and 35b of the rope main body 20 into the middle of the corresponding first and second terminal parts 35a and 35b in the opposite direction. With this, the work of connecting both end portions 35a and 35b of the hanging rope 30 can be performed.

[Characteristics of the connecting part of the hanging rope]

<1> Slidability of the connection part of the hanging rope and the mesh of the bag body The sliding property of the connection part 34 of the suspension rope 30 and the mesh 21 of the bag body 20 will be explained with reference to FIG.
In the connecting part 34 of the hanging rope 30, the first and second terminal parts 35a and 35b are inserted into the rope body, so the end of the rope does not protrude from the surface of the rope body, and no protrusions are generated. do not.
Furthermore, a large step does not occur at the boundary between the connecting portion 34 of the hanging rope 30 and the rope body.
Therefore, when the hanging rope 30 slides on the mesh 21 of the bag main body 20, the connecting part 34 of the hanging rope 30 is not caught on the mesh 21 of the bag main body 20, and can slide smoothly.
Therefore, there is no fear that the net fabric of the bag body 20 will be torn when the hanging rope 30 is lifted.

<2> Tensile strength of the connecting portion of the hanging rope The tensile strength of the connecting portion 34 of the hanging rope 30 will be described with reference to FIG.
FIG. 6(B) shows a deformed connection structure of the first and second terminal portions 35a and 35b shown in FIG. 6(A) of the connecting portions 34 inserted into the rope body.
The connecting portion 34 of the hanging rope 30 exhibits high tensile strength due to several factors described below.

<2.1> Factors due to rope gripping force (restraint force) When tension (load) F _R and F _L act on both ends of the connecting portion 34 in the direction of separation, the first and second overlapping restraining portions 23a, 23b Since the tension forces F _R and F _L also act on both ends of , equal gripping forces G ₁ and G ₂ are generated on the first and second overlapping restraining portions 23a and 23b.
The gripping forces G ₁ and G ₂ act over the entire length of the first and second polymerization restraint parts 23a and 23b, and increase in proportion to the tension forces F _R and F _L , so that The frictional resistance at 23a and 23b increases, and the tensile strength of the connecting portion 34 increases.

<2.2> Factors due to engagement of uneven torsional surfaces In the present invention, the uneven twisted surfaces 31a formed on the circumferential surface of each strand 31 appear on the inner and outer circumferential surfaces of the hanging rope 30.
Therefore, in the first and second overlapping restraining parts 23a and 23b where the rope bodies are overlapped, the uneven torsion surfaces 31a on the inner and outer peripheral surfaces of the hanging rope 30 mesh with each other, thereby increasing the frictional resistance.

<2.3> Factors due to changes in hardness of uneven torsional surface In the present invention, as explained below, by using an improved braided rope as the hanging rope 30, the tension acting on the hanging rope 30 is used to suspend the rope. The connection strength of the connection portion 34 of the rope 30 is increased.
When lifting a structure for civil engineering work, a huge tensile force acts on the lifting rope 30.
The huge tensile force acting on the hanging rope 30 acts on each strand 31, and the bundle yarn of each strand stretches in the axial direction against the untwisting force.
When the yarn bundle of each strand 31 reaches its elongation limit, the uneven twisted surface 31a formed on the surface of the yarn bundle of the strand 31 becomes hard.
By changing the uneven torsion surfaces 31a formed on the inner and outer peripheral surfaces of the hanging rope 30 to be hard, the frictional resistance of the joint surfaces in the first and second overlapping restraining parts 23a and 23b where the rope bodies are overlapped becomes significantly higher.
That is, the frictional resistance of the uneven torsion surfaces 31a formed on the inner and outer circumferential surfaces of the hanging rope 30 is significantly higher after the tension is applied than before the tension is applied.

As explained above, in the present invention, the connecting portion 34 of the hanging rope 30 is not caught in the mesh 21 of the bag body 20, and the connecting portion 34 of the hanging rope 30 has a high tensile strength due to the plurality of factors described above. Therefore, it has become possible to use the braided rope as the hanging rope 30 of a structure for civil engineering work.
It has been confirmed through actual experiments that the hanging rope 30 can withstand practical use.

[Example 2]
In the first embodiment, the strand 31 is constructed of a bundle of a plurality of monofilament yarns 32 having an uneven and twisted surface on the circumferential surface, but the present invention is not limited to this.
The strand 31 may be configured by mixing one or more of a multifilament yarn, a taslan yarn, or a spun yarn (spun yarn) into a bundle yarn mainly composed of a plurality of monofilament yarns 32.

When multifilament or taslan yarn is mixed into the monofilament yarn 32, each fiber of filament yarn or spun yarn is thinner and has a larger surface area than monofilament, so it has a higher frictional force, so it becomes 100% monofilament yarn. The frictional resistance of the circumferential surface of the strand 31 can be increased compared to the case of 32 yarn bundles.

The amount (mixing ratio) of multifilament or taslan yarn mixed into the plurality of monofilament yarns 32 can be selected as appropriate.

[Example 3]
In Example 1, the configuration in which the connecting portion 34 is configured by the first and second overlapping restraining portions 23a and 23b has been described. It is fine if it is set up.
That is, after inserting it into the rope main body and letting each of the first and second terminal parts 35a and 35b out of the rope main body, it is inserted into the rope main body again and is inserted and removed at multiple points on one side of the rope main body, Third and fourth polymerization restraint parts (not shown) may be arranged outside the first polymerization restraint part 23a or the second polymerization restraint part 23b.
The arrangement of the polymerization restraining portions can be selected as appropriate.

As in this example, by increasing the number of rows of overlapping restraining portions forming the connecting portion 34 to four or more, the connection strength of the connecting portion 34 can be further increased.

A...Structure for civil engineering work 10...Bag body for civil engineering work 20...Bag body 21...Mesh 22 of the bag body...Mesh of the bag body Mouth part 23...Tie rope 30...Hanging rope 31...Strand 31a...Uneven twisted surface 32...Monofilament thread 33...Strand unit 34 ...Hanging rope connecting part 35a...First terminal part 35b...Second terminal part 36a...Second introduction port 36b...First introduction port 40...・Infill material

In the present invention, a hanging rope is attached to the mouth of a bag body by going around it, a first terminal part and a second terminal part are formed over a certain length at both ends of the hanging rope, and the first terminal part A first overlapping restraint part formed by inserting a part of the second end part into the rope main body of the second end part, and a second overlap restraining part formed by inserting a part of the second end part into the rope main body of the first end part. A bag for civil engineering work comprising a fiber hanging rope in which at least a polymer restraint part is arranged in series and connected to form an endless structure, the hanging rope having a braided or netted structure with a plurality of strands as one unit. The plurality of strands are made of a plurality of monofilament yarn bundles, and the plurality of monofilament yarn bundles are twisted in the same direction to form the plurality of monofilament yarn bundles. In order to apply an untwisting force, the plurality of monofilament yarn bundles have an uneven torsion surface formed by a spiral protrusion on the circumferential surface, and the uneven torsion surface is exposed on the inner and outer circumferential surfaces of the hanging rope. .
In another form of the present invention, one or more of multifilament yarn, taslan yarn, or spun yarn is mixed into a bundle yarn in which the plurality of strands are mainly composed of a plurality of monofilament yarns having an uneven twisted surface on the circumferential surface. It may also be configured by
In another embodiment of the present invention, the inner and outer circumferential surfaces of the rope main body constituting the first overlapping restraining portion and the second end portion are in contact with each other via an uneven torsion surface.
In another aspect of the present invention, when a tensile force is applied to the hanging rope, the uneven torsion surfaces formed on the inner and outer circumferential surfaces of the hanging rope become hard.
In another aspect of the present invention, the stitches of the hanging rope are expanded to form first and second introduction ports, and the first or second end portion is inserted into the rope body through the first or second introduction port. It is inserted into.
In another aspect of the present invention, when a tensile force is applied to the hanging rope, the first and second overlapping restraining portions contract in diameter to restrain the inserted first and second end portions.

Claims (7)

A hanging rope is attached to the mouth of the bag body by going around it, a first terminal part and a second terminal part are formed over a certain length at both ends of the hanging rope, and a part of the first terminal part is formed. a first overlapping restraining part formed by inserting the second end into the rope main body; and a second overlapping restraining part formed by inserting a part of the second end into the rope main body of the first end. A bag for civil engineering work, comprising a hanging rope arranged in series at least and connected in an endless structure,
The hanging rope is made of a hollow braided rope in which a plurality of strands are woven into a braided or netted shape as a unit,
The plurality of strands are made of a bundle of a plurality of monofilament yarns having an uneven twisted surface on the circumferential surface,
characterized in that the uneven torsion surface is exposed on the inner and outer circumferential surfaces of the hanging rope,
A bag for civil engineering work equipped with a hanging rope. The plurality of strands are characterized in that one or more of multifilament yarn, taslan yarn, or spun yarn is mixed into a bundle yarn mainly composed of a plurality of monofilament yarns having an uneven twisted surface on the circumferential surface. A bag for civil engineering work comprising the hanging rope according to claim 1. The hanging rope according to claim 1 or 2, characterized in that the bundles of the plurality of monofilament yarns are twisted in the same direction, and an untwisting force is applied to the bundles of the plurality of monofilament yarns. Equipped with a bag for civil engineering work. The hanging rope according to claim 1 or 2, wherein the inner and outer circumferential surfaces of the rope main body constituting the first overlapping restraining portion and the second terminal portion are in contact with each other via an uneven torsion surface. A bag for civil engineering work. 3. The bag for civil engineering work equipped with a hanging rope according to claim 1 or 2, wherein when a tensile force is applied to the hanging rope, the uneven torsion surfaces formed on the inner and outer circumferential surfaces of the hanging rope harden. . A first and second introduction port is formed by expanding the stitches of the hanging rope, and the first or second end portion is inserted into the rope body through the first or second introduction port. A bag for civil engineering work comprising the hanging rope according to claim 1 or 2. 3. The suspension rope according to claim 1, wherein when a tensile force is applied to the hanging rope, the first and second overlapping restraining portions contract in diameter and restrain the inserted first and second end portions. A bag for civil engineering work equipped with a hanging rope.

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