JP3807988B2 - Pouch body having holes and method for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag body that is disposed between a block and the ground when the block is fixed to the ground by an anchor and fills a self-hardening fluid, and a method for manufacturing the same.
[0002]
[Prior art]
In the civil engineering field, bags having holes for passing anchors are used as bags used for filling, jacks, slope bags and the like for injecting grout and the like. That is, when fixing the block to the ground with the anchor, the bag body having this hole is first arranged between the block and the ground, and after passing the anchor through the hole, the bag body is self-adhesive such as grout. By injecting the hard fluid, it is used to prevent a gap from being generated between the ground and the block and to bring the block into close contact with the ground.
[0003]
As a bag body having such a hole, generally, a through-hole is provided in each of the upper and lower base fabrics constituting the skeleton of the bag body, and a tubular fabric is sewn in the hole.
[0004]
[Problems to be solved by the invention]
However, when the hole provided in the bag body is formed of a cylindrical woven fabric, the cylindrical portion is wrinkled when folded, and thus it is difficult to ensure a predetermined hole diameter. Moreover, since it is wrinkled when it is folded, there is a problem that it is easily bulky.
[0005]
A sewing portion exists between the cylindrical portion and the upper and lower base fabrics. However, it is extremely difficult to attach the cylindrical portion to the upper and lower base fabrics so that wrinkles are not generated in the sewing portions. For this reason, wrinkles in the sewn portion tend to cause a decrease in the strength of attaching the cylindrical portion to the upper and lower base fabrics and a decrease in sealing performance that prevents the self-hardening fluid from leaking to the outside.
[0006]
The present invention has been made in view of the above problems, and prevents wrinkles from occurring, and even when folded, the hole can ensure a constant diameter, and the central portion of the bag body can be injected with a self-hardening fluid. It aims at providing the bag body which has a hole which can be inflated with it, and its manufacturing method.
[0007]
[Means for Solving the Problems]
The bag body according to claim 1 of the present invention for solving the above-mentioned problem is arranged such that when the block is fixed to the ground by an anchor, the bag body is disposed between the block and the ground, A bag body having a hole for passing an anchor, which is used when the block is brought into close contact with the ground by injecting a self-hardening fluid into the ground, wherein the hole is formed in a bellows structure. It is a bag body which has a hole.
Since the hole for passing the anchor has an accordion structure, the hole can have a constant diameter even when folded, and the central portion of the bag body can expand with the injection of the self-hardening fluid.
[0008]
A bag body having a hole according to claim 2 is the bag body having a hole according to claim 1, wherein the bellows structure is formed by sewing a perforated cloth.
Since the perforated cloth is formed by sewing, wrinkles can be prevented when the bellows structure is folded, and wrinkles of the sewn portion can be prevented.
[0009]
According to a third aspect of the present invention, there is provided the bag body having the hole according to the second aspect, wherein the bellows structure includes a portion in which a plurality of the perforated cloths are sewn and the outer edges of the perforated cloth are sewn. This is a bag body having a hole.
A bellows that can secure a constant hole diameter without wrinkling even when folded, can prevent wrinkling of the sewing portion, and can inflate the central portion of the bag body with the injection of the self-hardening fluid The structure can be easily realized.
[0010]
The bag body having a hole according to claim 4 is characterized in that, in claim 2 or 3, the bellows structure is formed in a multi-stage including a plurality of portions where the outer edges of the perforated cloth are sewn together. The bag body has a hole.
Even if the bag body has a large desired amount of expansion, a bellows structure that can secure a constant hole diameter without wrinkling when folded can be obtained.
[0011]
The bag body having a hole according to claim 5 is the bag according to any one of claims 2 to 4, wherein both end portions of the bellows structure are formed in a flange shape with the perforated cloth, and both end portions of the flange shape are It is the bag body which has a hole characterized by being attached to the edge part of the said hole in the base fabric of a bag body, respectively.
Since the flange-like portion is attached to the base fabric of the bag body, the bellows structure can be easily attached by selecting various fixing methods such as bonding not only by sewing but also by bonding. Moreover, even if it is a bag body with a large surface area and a bag body which has many holes, the hole of a bellows structure can be attached easily.
[0012]
The bag body having a hole according to claim 6 has a hole according to claim 1, wherein the bag body having a hole is a slope bag body used for a slope construction method. It is a bag.
Because the hole for passing the anchor has a bellows structure, the hole can have a constant diameter even when folded, and the center part of the bag body obtains a sloped bag body that expands with the injection of self-hardening fluid Can do.
[0013]
The method for manufacturing a bag body having a hole according to claim 7, when the block is fixed to the ground by an anchor, the bag body is disposed between the block and the ground, and a self-hardening fluid is injected into the bag body. A method of manufacturing a bag having a hole for passing an anchor, which is used when the block is brought into close contact with the ground, wherein a plurality of perforated cloths are sewn to form the hole of the bellows structure. The process includes a processing step, and the step is a method for manufacturing a bag body having holes, wherein the outer edge side is sewn after the inner edge side of the perforated cloth is sewn.
Since the outer edge side is sewn after the inner edge side of the perforated cloth is sewn, even if the base fabric of the bag body is large, the sewing work can be easily performed while rotating the entire base fabric.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional view of a slope construction method in which a block is brought into close contact with a slope ground using a bag body provided with dripping prevention means.
[0015]
In FIG. 1, A is a slope bag, 1 is an anchor, 2 is a block, 4 is a self-hardening fluid, and 5 is a fixture. The fixture 5 includes a pipe 5a and a reinforcing bar 5b. The block 2 is fixed to the uneven ground 7 with the anchor 1 in a state having a gap. A slope bag A to which a pipe 5a is attached is disposed between the block 2 and the ground 7, and the pipe 5a is fixed to the ground 7 with a reinforcing bar 5b. In the slope bag A, the intermediate cloth 10 is stretched and filled with the self-hardening fluid 4. Here, the self-hardening fluid 4 refers to a fluid that solidifies over time, such as cement milk and mortar.
[0016]
Next, in FIG.2 and FIG.3, the structure and operation | movement of the bag for slopes of 1st Embodiment of this invention are demonstrated.
[0017]
In FIG. 2, the structure of the slope bag A in the first embodiment is shown. (A) is a plan view of the slope bag A, (B) is a cross-sectional view along line aa 'in (A), and (C) is a cross-sectional view along line BB' in (A). Show. The slope bag A includes an upper cloth 8, a lower cloth 9, an intermediate cloth 10 a, an injection port 11, a bag hole 12, and an attachment portion 17. As shown in FIG. 2A, the upper cloth 8 is formed of a cloth having substantially the same size as the block 2 in a top view. As shown in FIGS. 2B and 2C, the lower cloth 9 is formed of a bottomed cloth having an upper end folding portion 15, a lower end folding portion 16, and both end surplus portions 21 and 22. The upper cloth 8 and the lower cloth 9 become the basic skeleton of the cushion bag A in the form of a cushion cushion by being sewn around the upper cloth 8 and the lower cloth 9. By cutting the approximate center of the upper cloth 8 and the lower cloth 9 into a circle and attaching the bellows-shaped three-dimensional portion 14 between the upper cloth 8 and the lower cloth 9 by sewing, the bag hole 12 through which the anchor 1 is passed. Is formed. The attachment portion 17 includes an extension portion 17a of the upper cloth 8 and a cylindrical portion 17b at the tip. The injection port 11 is attached to the upper side of the both end surplus parts 21 and 22 of the lower cloth 9. The intermediate cloth 10a is a one-piece type woven fabric, the upper end of which is sewn and fixed to the upper cloth 8 together with the upper end folding portion 15 of the lower cloth 9, and the lower end of the intermediate cloth 10a is fixed to the lower cloth 9 by sewing. The intermediate cloth 10a is provided with a hole 13 through which the bellows-shaped three-dimensional part 14 is passed.
[0018]
FIG. 3 shows a step of fixing the block to the slope using the slope bag A in the first embodiment. In addition, it shows in the cc 'cross section of FIG. In FIG. 3A, the block 2 is installed in the ground 7 with a gap, and is temporarily fixed by the anchor 1. In the gap between the block 2 and the ground 7, the slope bag A fixed to the ground 7 with the fixture 5 is arranged. In FIG. 3 (b), the self-hardening fluid 4 is injected into the slope bag A from the injection port 11. When the self-hardening fluid 4 is injected, it accumulates at the lower end of the slope bag A, and the lower end folding portion 16 expands along with the ground 7. When the self-hardening fluid 4 is further filled, the intermediate cloth 10a is pulled downward, but the portion of the lower cloth 9 above the connecting portion between the intermediate cloth 10a and the lower cloth 9 is in a relaxed state with a margin. Therefore, the lower cloth 9 is in close contact with the ground 7. In FIG. 3C, after reaching the predetermined injection pressure, the injection of the self-hardening fluid 4 is stopped. When the injection of the self-hardening fluid 4 is finished, the fastening portion 1b is fastened to the tensile portion 1a of the anchor 1. In FIG. 3B, when the self-hardening fluid 4 is cured, the reinforcing bar 5b is removed, and the pipe 5a is removed from the attachment portion 17 of the slope bag A. The slope bag A remains disposed between the block 2 and the ground 7.
[0019]
FIG. 4 is a plan view showing a state in which the slope bag A is fixed to the ground under the block 2 in the present embodiment.
[0020]
The pipe 5a is attached to the sloped bag A having the bag hole 12 in an inserted state in the cylindrical portion 17b of the attachment portion 17, and a reinforcing bar 5b is driven into the lower portion of the pipe 5a. As long as the slope bag A can withstand and be fixed even after the injection of the self-hardening fluid 4, the position where the reinforcing bar 5b is driven may be anywhere, and the number of the driven bars may be any number.
[0021]
Next, referring to FIG. 5, the configuration and operation of the bag according to the second embodiment of the present invention will be described.
[0022]
In FIG. 5, the structure of the slope bag A in 2nd Embodiment is shown. FIG. 5 (a) is a plan view of the slope bag A, FIG. 5 (b) is a cross-sectional view along the line aa 'in FIG. 5 (a), and FIG. 5 (c) is a plan view of FIG. FIG. 5B is a cross-sectional view taken along the line bb ′ in FIG. 5A. The slope bag A includes an upper cloth 8, a lower cloth 9, a split-type intermediate cloth 10 b, 10 c, an injection port 11, a bag hole 12, and an attachment portion 17. The first embodiment shown in FIG. 2 differs from the first embodiment only in the form of the intermediate cloth, and the other structure is the same as in FIG. In FIG. 5, the upper part of the upper cloth 8 and the lower part of the lower cloth 9 are connected by the split type intermediate cloths 10b and 10c, respectively.
[0023]
In the second embodiment, the step of fixing the block to the slope using the slope bag A was the same as that of the first embodiment except that the slope bag shown in FIG. 5 was used.
[0024]
In the first embodiment and the second embodiment, as the sewing position of the intermediate cloth 10a, 10b, 10c to the lower cloth 9, the distance from the lowermost portion excluding the folding portion 16 of the lower cloth 9 is 0 of the total length L. Within 1/3, the lower side is preferable because it is easy to prevent the slope bag A from protruding from the block 2. If the intermediate cloth 10 is sewn to the lower cloth 9 over 1/3, the length preventing the sagging will be too small, and the effect will be reduced. Since the cloth 9 hangs down, it makes no sense. When the bag body hole 12 for passing the anchor 1 is provided in the center portion of the slope bag A, the reinforcement of the bag body hole 12 must be considered. A position where the distance is about 1/3 to 1/5 of the full length L is preferable. Regardless of the size of the gap between the block 2 and the ground 7, it is easy to keep the connection position of the lower cloth 9 at a predetermined position. It is better to be separated from the connection position as much as possible. Further, as the sewing position of the intermediate cloth 10a, 10b, 10c to the upper cloth 8, the sewing position of the upper cloth 8 should be close to the upper end in order to maintain the length of the intermediate cloth 10a, 10b, 10c. Is desirable.
[0025]
Next, preferred embodiments of the upper cloth 8 and the lower cloth 9 used for the slope bag A will be described with respect to the first embodiment and the second embodiment. The upper cloth 8 and the lower cloth 9 should have an air permeability of 1.0 cm ³ / sec / sm ² or less. This air permeability can be adjusted by pressing the cloth. Moreover, you may adjust by carrying out resin processing of cloth. With this degree of air permeability, the slope bag A can discharge the air therein, and although there is no air accumulation, the discharge of moisture of the self-hardening fluid is suppressed. Further, one or both of the warp and weft yarns of the slope bag A may be woven with a yarn mixed with water-swellable fibers. Examples of the water-swellable fibers include starches of natural polymers, celluloses, polyvinyl alcohols of synthetic polymers, acrylics, polyethers, condensation polymers, and the like. By adjusting the adhesion amount of these resins and the like when processing into fibers, it is possible to obtain a slope bag body having desired fluid impermeability. Moreover, what carried out the application | coating process and immersion process of the water-swellable fiber in the state of a woven fabric may be used. At the beginning of injection of the self-hardening fluid 4, the excess water of the self-hardening fluid leaks from the pores of the textured bag A and between the fibers, leaving only moisture necessary for hardening the self-hardening fluid 4. It becomes a hardened body. When the self-hardening fluid 4 is further injected, the water-swellable fiber mixed with the yarn constituting the slope bag A is expanded by the moisture contained in the self-hardening fluid, and the slope bag A The holes and fibers in the textured portion are closed, and the passage of moisture inside and outside the slope bag A is eliminated. Therefore, the outflow of moisture to the outside of the slope bag A can be reduced. As described above, the bag body that can suppress the discharge of moisture is effective for the environment even when there is no intermediate cloth.
[0026]
As described below, the embodiment of the present invention may be modified as follows. In the first embodiment and the second embodiment, as a sag prevention means, the block is made up of the slope by the slope bag even when the upper cloth and the lower cloth are sewn with a rope or a belt instead of the wide woven cloth. It can be in close contact with the ground.
[0027]
In the first embodiment and the second embodiment, as the sagging prevention means, a plurality of intermediate cloths having different lengths are used, the sewing position of the upper cloth is set at one place, and the sewing position with the lower cloth is shifted. By using a multilayer intermediate cloth, the block can be brought into close contact with the ground of the slope by the slope bag. Also, using multiple intermediate cloths of the same length, shifting the sewing positions of the upper and lower cloths to make a multi-layer intermediate cloth, so that the block can be grounded by the slope bag body It can be adhered. In this way, it is effective to make the intermediate cloth multilayered when the ground is uneven.
[0028]
In 1st Embodiment and 2nd Embodiment, although the fixing tool 5 is installed in the ground 7, the position which installs the fixing tool 5 is not necessarily the ground 7 of the position immediately above the block 2, and depending on the case May be far above the block. Further, the slope bag A may be directly fixed to the block 2 if the upper cloth 8 is in a tensioned state and does not move with respect to the block 2.
[0029]
In the first embodiment and the second embodiment, the anchor 1 is provided at the center, but the anchor 1 may be provided at the four corners as long as the block 2 can be fixed. The inlet 11 may be located anywhere as long as it protrudes from the block 2 of the slope bag A, and any number may be provided.
[0030]
In 1st Embodiment and 2nd Embodiment, although it is set as the single-piece bag body matched to the magnitude | size of a block, the divided | segmented bag body may be sufficient. Further, although there are blocks such as a cross shape and a rhombus shape, the bag body may be used according to the shape and size of the block.
[0031]
Further, the slope bag according to the present invention can be used for a pressure receiving plate made of cast-in-place reinforced concrete using a reinforcing bar form. In this case, mortar is first poured into the slope bag body to eliminate the gap between the ground and the rebar form, and then concrete is placed on the rebar form.
[0032]
【Example】
Hereinafter, the first and second embodiments of the present invention will be described specifically by way of examples.
Example 1
In the first embodiment, a base fabric woven with 420 denier polyester filament yarns and having a density of 55 in the vertical direction and 55 in the horizontal direction and 52 in the horizontal direction with the density was used. When the air permeability was measured by JIS1096 (Method A), it was 0.4 cm ³ / sec / sm ² . The bag body was formed by sewing the two base fabrics into a cushion, and attached injection ports with an inner diameter of 1 mm as injection ports at two locations on both sides of the top of the bag body. The upper cloth and the lower cloth have a width of 3150 mm and a length of 3000 mm, and the lower cloth further has a side portion of 400 mm, and is folded inside the bag body at the upper end portion, the lower end portion and both end portions of the lower cloth. The intermediate cloth is a single sheet of 2780 mm wide and 2250 mm long, with the upper cloth connecting position at the top of the upper cloth, and the lower cloth connecting position is 750 mm, which is 1/4 of the total length from the lower end excluding the folding part. It was. The hole of the bag body was φ300 mm, the hole of the intermediate cloth was φ500 mm, and the three-dimensional part had a bellows structure. Moreover, the attachment part provided in the upper part of the bag for slopes was made into 3150 mm in width and 600 mm in length, and 200 mm of them was made into the cylinder shape so that a fixing tool can be inserted. First, the anchor was installed and the bag body was installed on the ground. A 4 m φ76 mm iron pipe was inserted into the attachment part of the bag body, and six φ32 mm reinforcing bars were driven directly under the pipe to fix the bag body, and then a block was set on the bag body. The anchor and the block were temporarily fixed, cement milk was injected into the bag, and after reaching a predetermined injection pressure, the injection was stopped and the anchor was tightened. After hardening the cement milk, the reinforcing bars and pipes were removed and the bag was left as it was.
[0033]
(Example 2)
In the second embodiment, a base fabric woven with a polyester filament yarn of 250 denier and having a density of 70 pcs / 縦 and 66 横 / 横 was used. When the air permeability was measured according to JIS 1096 (Method A), it was 0.8 cm ³ / sec / sm ² . The same process as in Example 1 was carried out except that the intermediate cloth was a split type and two cloths having a width of 1090 mm and a length of 2250 mm were used, and the central three-dimensional portion of the bag body was not a bellows structure. In addition, the hole of a bag body is (phi) 300 mm, and the hole for anchors is not provided in the intermediate | middle cloth.
[0034]
Example 3
In Example 1, a woven fabric in which water-swellable fibers were mixed with a base fabric was used. This is a woven fabric woven using warps and / or wefts, or a fiber in which water-swellable fibers are dipped in one of them or water-absorbing fibers.
[0035]
In Example 1, the slope bag body did not sag during cement milk injection, and hardly protruded from the block. When the upper part of the slope bag body was visually confirmed from the gap between the block and the ground, the cement milk was uniformly filled without air accumulation. Also, during cement milk injection, there was less outflow of moisture and solids than before, and there was almost no outflow of solids in particular. After the cement milk was hardened, it was confirmed by removing the block that the cement milk had spread to every corner and was in close contact with the ground and the block.
[0036]
As confirmed in Example 2 after the cement milk was cured, the vicinity of the anchor did not adhere as much as Example 1, but there was no particularly noticeable defect. The amount of moisture and solid content of cement milk was slightly more than in Example 1, but not so much as to affect the surroundings.
[0037]
In Example 3, the slope bag did not sag during the cement milk injection, and hardly protruded from the block. Moreover, there was less outflow of a water | moisture content and solid content than Example 1 during cement milk injection | pouring.
[0038]
The above is the description of the slope bag A according to the first and second embodiments. Note that the slope bag A described in the first embodiment is a bag body that includes the drooping prevention means 10 and the hole 12 that includes the bellows structure 14 through which the anchor 1 passes. By having the hole having the bellows structure in this way, the hole can have a constant diameter even when folded, and the central portion of the bag body can be expanded with the injection of the self-hardening fluid.
Here, the structure of the bag body having holes formed in the bellows structure will be described in more detail.
[0039]
In the first and second embodiments, the slope bag body has been described as an example. However, in the civil engineering field, a bag body used for filling, jacks, slope bag bodies, etc. used by injecting grout or the like. As a bag body having a hole for passing an anchor is used. That is, when fixing the block to the ground with the anchor, the bag body having this hole is first arranged between the block and the ground, and after passing the anchor through the hole, the bag body is self-adhesive such as grout. By injecting the hard fluid, it is used to prevent a gap from being generated between the ground and the block and to bring the block into close contact with the ground.
[0040]
As a bag body having such a hole, generally, a through-hole is provided in each of the upper and lower base fabrics constituting the skeleton of the bag body, and a tubular fabric is sewn in the hole.
[0041]
However, when the hole provided in the bag body is formed of a cylindrical woven fabric, the cylindrical portion is wrinkled when folded, and thus it is difficult to ensure a predetermined hole diameter. Moreover, since it is wrinkled when it is folded, there is a problem that it is easily bulky.
[0042]
A sewing portion exists between the cylindrical portion and the upper and lower base fabrics. However, it is extremely difficult to attach the cylindrical portion to the upper and lower base fabrics so that wrinkles are not generated in the sewing portions. For this reason, wrinkles in the sewn portion tend to cause a decrease in the strength of attaching the cylindrical portion to the upper and lower base fabrics and a decrease in sealing performance that prevents the self-hardening fluid from leaking to the outside.
[0043]
Therefore, the third embodiment of the present invention to be described below prevents wrinkles, and even when folded, the hole can secure a constant diameter, and the central portion of the bag body can be injected with a self-hardening fluid. It aims at providing the bag body which has a hole which can be inflated with it, and its manufacturing method.
[0044]
FIG. 6 is a view showing a structure of a bag body B (hereinafter simply referred to as “bag body B”) having holes according to the third embodiment. (A) is a plan view of the bag body B, (B) is a cross-sectional view along line aa ′ in (B), and (C) is a cross-sectional view along line BB ′ in (B) the plan view ((B). (C) shows only the cross section). The bag body B includes an upper cloth 8, a lower cloth 9, an intermediate cloth 10 a, an injection port 11, a bag hole 12, and an attachment portion 17, similarly to the bag body A of the first embodiment. (The same code | symbol is attached | subjected about the part similar to 1st Embodiment). When the bag body B is used as a slope bag body, as described in the first embodiment, the intermediate cloth 10a and the attachment portion 17 are preferably provided. These are not always necessary.
[0045]
A bag hole 12 (hereinafter simply referred to as “hole 12”) that is a hole for passing the anchor 1 in the bag B according to the present embodiment is formed by cutting out the central portion of the upper and lower base fabrics (8, 9) in a circular shape. A through hole is formed by attaching the bellows structure 30 to the cut-out portion. The position at which the holes 12 are provided is not necessarily limited to the central portion, and a desired number is appropriately provided at a desired location according to the position through which the anchor 1 is passed.
[0046]
The bellows structure 30 is composed of a perforated cloth (31, 32) having a hole in the center portion. Specifically, as shown in FIGS. 6 (a) to (c), an inner periphery 30a (inner edge) Part) and an outer periphery 30b (outer edge part), and formed by sewing and attaching two donut-shaped circular cloths (31, 32) cut out at the center. This sewing location is schematically shown in FIG. FIG. 7 is a diagram corresponding to (B) to (C) of FIG. The inner periphery 30a side of the circular cloth 31 is sewn at the edge portion of the hole 12 in the upper cloth 8 and the sewing portion (1). Similarly, the inner peripheral 30a side of the circular cloth 32 is It is sewn at the edge portion of the hole 12 and the sewing portion (2). The circular cloth 31 and the circular cloth 32 are sewn at the sewing portion {circle around (3)} between the outer peripheral 30b sides (outer edge portions). That is, the sewing parts ((1) to (3)) are parts sewn along the circumference.
[0047]
The hole 12 is formed as the bellows structure 30 to which the doughnut-shaped circular cloths (31, 32) are sewn and attached as described above, thereby preventing wrinkles when folded. Therefore, the hole 12 can ensure a constant diameter even when folded, and the central portion of the bag body B can be inflated smoothly as the self-hardening fluid is injected. And because it doesn't wrinkle when folded, it won't be bulky. In addition, since the bellows structure 30 can be formed without causing wrinkles in the sewing parts (1) to (3), the attachment strength to the upper and lower base fabrics (8, 9) is reduced, and the self-hardening fluid is reduced. The sealing performance that prevents leakage to the outside is not deteriorated. The maximum height of the bellows structure 30 stretched in the vertical direction is preferably slightly larger than the height dimension at which the bag body B is desired to be inflated because a load is not easily applied to the base fabric (8, 9).
[0048]
Further, the bellows structure of the bag body B is provided with only one portion (<3>) where the outer periphery 30b side of the circular cloth (31, 32) is sewn, as in the bellows structure 30 (hereinafter, this configuration). (Referred to as “single stage”), a plurality of stages may be provided. FIG. 8 illustrates a bellows structure 33 that includes two portions where the outer peripheral sides are sewn together. The bellows structure 33 is formed by sewing four donut-shaped circular cloths (34 to 37). That is, the circular cloth 34 is sewn with the upper cloth 8 and the sewing part {circle around (1)}, the circular cloth 37 is sewn with the lower cloth 9 and the sewing part {circle around (2)}, and the circular cloths 35 and 36 are the circular cloths 34 and 37, respectively. It is sewn on the outer periphery 33b side (sewn portions (4), (5)). The circular cloths 35 and 36 are sewn together on the inner circumference 33a side (sewn portion (3)). In this way, by adopting a multistage bellows structure, even if the amount of expansion desired for the bag body B is large, a bellows structure that can ensure a constant hole diameter without wrinkling when folded. can do. According to this configuration, the number of steps of the bellows structure can be arbitrarily formed.
[0049]
In addition, as shown in FIG. 9, the bellows structure has both end portions of the bellows structure formed in a flange shape with a circular cloth provided at both end portions, and both end portions of the flange shape are formed by holes 12 on the bag body B side. It may be attached to each edge portion. The bellows structure 38 shown in FIG. 9A includes two circular cloths (39, 40) formed in a single-stage bellows structure and two circular cloths provided in a flange shape at both end portions of the bellows structure. (41, 42). The circular cloths 39 and 40 are sewn on the outer circumference 38b side (sewing part (3)), and the circular cloths 41 and 42 are sewn on the inner circumference 38a side with the circular cloths 39 and 40, respectively (sewing part). (1), (2)). The outer peripheral side 38b of the circular cloths 41 and 42 is fixed to the upper cloth 8 and the lower cloth 9 on the outer side (adhering portions (4) and (5)), respectively.
[0050]
As described above, the bellows structure 38 is fixed to the base fabric (8, 9) of the bag body B with the flange-shaped portions (41, 42), and is not limited to sewing, but can be variously bonded by bonding. The bellows structure can be easily attached by selecting the fixing method. When injecting the self-hardening fluid into the bag B, the fixing part (4), (5) does not act in the peeling direction but acts as a shearing force, so it adheres to a wide width with an adhesive. By doing so, sufficient fixing strength can be obtained. In addition, according to the configuration of the bellows structure 38, the through hole having the bellows structure can be manufactured by post-adhesion, and therefore the bellows structure hole can be easily attached even to a bag body having a large surface area or a bag body having a large number of holes. Can do. By the way, the diameter of the hole in the upper and lower base fabrics (8, 9) is slightly larger than the diameter of the hole in the center of the circular fabric (39 to 41), so that the sealing performance of the self-hardening fluid is improved. Can do.
[0051]
Even in the case of the bellows structure provided with the flange-shaped portion, it can be formed in multiple stages similar to the bellows structure 33 as shown in FIG. Moreover, as shown in FIG.9 (c), the circular cloth of a flange-shaped part may be fixed to the upper cloth 8 and the lower cloth 9, respectively, inside. By fixing in this way, the appearance can be improved compared to the case of fixing on the outside.
[0052]
In the third embodiment, an example in which a donut-shaped circular cloth is used as the perforated cloth has been described. However, the cloth shape is not limited to this, and various cloth shapes can be selected as long as the bellows can be configured. It is. For example, a polygonal cloth with holes may be used.
[0053]
Below, the manufacturing method of the bag B which concerns on 3rd Embodiment is demonstrated. FIG. 10 schematically shows the bellows processing step for forming the hole 12 made of the bellows structure 30, and FIG. 11 schematically shows the bellows processing step for forming the hole 12 consisting of the bellows structure 38.
[0054]
In the case of the bellows structure 30, first, as shown in FIG. 10 (a), the circular cloth 31 and the upper and lower base cloths 8 and 9 in which the outer shape and the central hole are cut into a desired shape, and 32 are sewn on the inner circumference 30a side and attached (sewn portions (1), (2)). In the case of the bag body B having the intermediate cloth 10a, at this time, one end of the intermediate cloth 10a (the side corresponding to the lower end side in the case of the bag body A in FIG. 2) is sewn and attached to the lower cloth 9. In addition, the hole formed in the upper and lower base fabrics (8, 9) and the hole formed in the circular fabric (31, 32) may be previously opened before sewing or may be opened after sewing.
[0055]
Then, after the circular fabrics (31, 32) are respectively sewn and attached to the upper and lower base fabrics (8, 9), the outer peripheral 30b sides of the circular fabrics (31, 32) are sewn together (sewn portion (3)). ). That is, the sewing order is in the order of ((1), (2)) → (3). Thus, after sewing the inner circumference 30a side (inner edge side), the outer circumference 30b side (outer edge side) is sewn last, so that even when the base fabric (8, 9) is very large, 8, 9) Sewing can be easily performed while rotating the whole, and it is easy to work. It is also possible to easily perform the sewing work without passing the upper and lower base fabrics (8, 9) through the arm of the sewing machine. In particular, when the bellows diameter is small, it is difficult to sew ((1), (2)) later, but according to this method, it can be easily sewn.
[0056]
After finishing the sewing work ((1), (2)) → (3), the periphery of the upper and lower base fabrics (8, 9) is sewn, and the injection port 11 and the mounting portion 17 are attached, so that FIG. A bag body B as shown in FIG. In addition, when the bag body B is provided with the intermediate cloth 10a, when the periphery of the upper and lower base cloths (8, 9) is sewn, the other end side of the intermediate cloth 10a (in the case of the bag body A in FIG. 2). The side corresponding to the upper end side) should also be sewn together.
[0057]
The manufacturing method of the bag body B described above is a case including a bellows processing step of forming the hole 12 made of the bellows structure 30, but the same bellows is also obtained when the multi-step bellows structure 33 shown in FIG. 8 is attached by sewing. It is preferable to manufacture by a processing process. That is, it is preferable to sew the sewing parts (4, 5) last, as in the order of (1), (2), 3), 4), 5). . In this way, after the inner periphery 33a side is sewn, the sewing operation can be easily performed by sewing the outer periphery 33b side.
[0058]
Further, in the case of the bellows processing step for forming the hole 12 including the flanged bellows structure 38, the bellows portion is first formed by sewing as shown in FIG. As in the case of the bellows structure 30, the sewing sequence at this time is easy to perform if the sewing is performed in the order of (1), (2), and (3).
[0059]
Then, a hole having the same size as the minimum diameter of the bellows is made in the upper and lower base fabrics (8, 9), and the flange-like portions (41, 42) are set through these holes, respectively. The upper and lower base fabrics (8, 9) and the flange-like portions (41, 42) are fixed to each other at (5) and (5). As described above, various fixing methods can be selected by bonding or sewing. In addition, about another manufacturing process, it is the same as that of the case of the bag body provided with the hole 12 which consists of a bellows structure 30. FIG.
[0060]
Also, in the case of a multistage bellows structure with a flange as shown in FIG. 9B, the bellows portion is first created and fixed to the upper and lower base fabrics (8, 9) as in the case of the bellows structure 38. . In this case, the sewing order for creating the multi-stage bellows structure is the order of (▲ 1 ▼, ▲ 2 ▼) → ▲ 3 ▼ → (▲ 4 ▼, ▲ 5 ▼) as in the case of the bellows structure 33. This is desirable from the viewpoint of facilitating the sewing work (see FIG. 8). In the case of the bellows structure of FIG. 9C, the fixing surface of the upper and lower base fabrics and the flange-like portion is only opposite to that of the bellows structure 38 (only the difference between the outer side and the inner side). It is created in the same procedure.
[0061]
【The invention's effect】
According to the first aspect of the present invention, since the hole for passing the anchor has a bellows structure, the hole can have a constant diameter even when folded, and the central portion of the bag body expands as the self-hardening fluid is injected. be able to.
[0062]
According to the invention of claim 2, since it is formed by sewing the perforated cloth, it can be prevented from wrinkling when the bellows structure is folded, and the sewn portion can also be prevented from wrinkling. it can.
[0063]
According to the invention of claim 3, it is possible to ensure a constant hole diameter without wrinkling even when folded, and to prevent the sewn portion from wrinkling, and the center of the bag body with the injection of the self-hardening fluid A bellows structure capable of expanding the portion can be easily realized.
[0064]
According to invention of Claim 4, even if it is a bag body with a desired large expansion | swelling amount, it can be set as the bellows structure which can ensure the diameter of a fixed hole, without being wrinkled when folded.
[0065]
According to the invention of claim 5, since the flange-like portion is attached to the base fabric of the bag body, it is possible to easily attach the bellows structure by selecting various fixing methods such as bonding not only by sewing but also by bonding. it can. Moreover, even if it is a bag body with a large surface area and a bag body which has many holes, the hole of a bellows structure can be attached easily.
[0066]
According to the invention of claim 6, since the hole for passing the anchor has a bellows structure, the hole can have a constant diameter even when folded, and the central portion of the bag body expands with the injection of the self-hardening fluid. A slope bag can be obtained.
[0067]
According to the invention of claim 7, since the outer edge side is sewn after the inner edge side of the perforated cloth is sewn, even if the base fabric of the bag body is large, it is easily sewn while rotating the entire base fabric. Work can be done.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view according to an embodiment of the present invention.
FIGS. 2A and 2B are a plan view and a cross-sectional view of a slope bag A according to the first embodiment. FIGS.
FIG. 3 is a construction process diagram according to the first embodiment.
FIG. 4 is an attachment view of a slope bag A according to the first embodiment.
FIG. 5 is a plan view and a cross-sectional view of a slope bag A according to a second embodiment.
6A and 6B are a plan view and a cross-sectional view of a bag body B having a hole according to a third embodiment.
FIG. 7 is a schematic diagram for explaining a bellows structure of a bag body B according to a third embodiment.
FIG. 8 is a schematic diagram illustrating a bellows structure according to a modified example of the bag body B of the third embodiment.
FIG. 9 is a schematic diagram for explaining a bellows structure according to a modification of the bag body B of the third embodiment.
FIG. 10 is a view for explaining a method of manufacturing the bag body B having a hole according to the third embodiment.
FIG. 11 is a diagram illustrating a manufacturing method related to a modified example of the bag body B having a hole according to the third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Anchor 2 Block 4 Self-hardening fluid 7 Ground 8 Upper cloth 9 Lower cloth 12 Bag body holes 30, 33, 38 Bellows structure 31, 32, 34-37, 39-41 Circular cloth B Bag body which has a hole

Claims (7)

An anchor used when a block is fixed on the ground by an anchor, a bag is placed between the block and the ground, and a self-hardening fluid is injected into the bag to bring the block into close contact with the ground. A bag body having a hole for passing through the hole, wherein the hole has a bellows structure. The bag according to claim 1, wherein the bellows structure is formed by sewing a perforated cloth. The bag according to claim 2, wherein the bellows structure includes a portion in which a plurality of the perforated cloths are sewn and the outer edge portions of the perforated cloth are sewn together. The said bellows structure is formed in the multistage provided with two or more parts which sewed the outer edge parts of the said perforated cloth, The bag body which has a hole of Claim 2 or 3 characterized by the above-mentioned. Both end portions of the bellows structure are formed in a flange shape with the perforated cloth, and both end portions of the flange shape are respectively attached to edge portions of the holes in the base fabric of the bag body. Item 5. A bag having a hole according to any one of Items 2 to 4. The said bag body which has a hole is a bag body for slopes used for a slope construction method, The bag body which has a hole in any one of Claims 1-5 characterized by the above-mentioned. An anchor used when a block is fixed on the ground by an anchor, a bag is placed between the block and the ground, and a self-hardening fluid is injected into the bag to bring the block into close contact with the ground. A method of manufacturing a bag having a hole for passing through,
Including a bellows processing step of sewing a plurality of perforated cloths to form the hole of the bellows structure, wherein the step includes sewing the inner edge side of the perforated cloth and then sewing the outer edge side. The manufacturing method of the bag body which has a hole.

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