JP4481130B2 - Civil engineering bag - Google Patents

Description

  The present invention relates to a civil engineering bag body that is used in civil engineering work and in which an end of a seamless tubular fabric is closed by sewing and an injection material is injected therein.

  Conventionally, in many various civil works such as a preload shell method, a bag body (a civil engineering bag body) formed by closing an end portion of a seamless tubular fabric by sewing is often used. This civil engineering bag body is used in accordance with various uses in various civil engineering work by injecting an injection material such as concrete, mortar, cement milk or the like into the inside thereof. As such a civil engineering bag, for example, a civil engineering bag used in the preload shell method described in Patent Document 1 is known. This civil engineering bag has a large-diameter portion woven without a seam and small-diameter portions at both ends thereof, and is sewn with a uniform seam that crosses in the width direction of the bag. The small diameter part of the part is closed.

JP 2001-295598 A (page 4, FIG. 1-2)

  In the conventional civil engineering bag, like the civil engineering bag described in Patent Document 1, both end portions are closed by being sewn with uniform seams crossing in the width direction of the bag. For this reason, when the injection material is injected into the civil engineering bag body, a force acts in a direction in which the end closed by the stitching is peeled off, that is, a direction in which the seam is opened, by the pressure generated by the injection. Therefore, when the injection pressure of the injection material acts, even if the pressure is much lower than the breaking pressure of the base fabric constituting the bag body, the sewing thread breaks or the seam is cut by the force acting in the direction of opening the seam. May loosen up.

  In view of the above circumstances, the present invention relates to a civil engineering bag body made of a tubular woven fabric, and provides a civil engineering bag body capable of improving the pressure resistance of a joint portion that joins end portions of the bag body. Objective.

Means and effects for solving the problems

Civil bag of the present invention relates to a bag body made of a tubular fabric.
The civil bag of the present invention has some features as described below in order to achieve the above object, alone the following characteristics, or comprises in combination.

The first aspect of civil bag of the present invention for achieving the above object, moving in a direction away from each other of a pair of edge portions in opposing positions in at least one end of the tubular fabric A first joint that restrains the first joint, and when the force is applied to the pair of edge portions in a direction away from each other, a force in a shear direction is applied to the first joint. Is that the pair of edge portions are joined together.

  According to this configuration, for example, when the injection material is injected into the bag body and a force in a direction away from the pair of edge portions is applied, a force in the shearing direction is applied to the first joint portion. The force acting in the direction of separating the pair of edge portions can be greatly reduced. For this reason, the pair of edge portions can be firmly held in a restrained state, for example, when an injection material is injected, the injection pressure is higher than the breaking pressure of the base fabric constituting the bag body. It is possible to prevent the joint from being damaged by extremely small pressure (for example, if the first joint is formed by sewing, the sewing thread is cut or the seam is loosened). Therefore, the pressure resistance of the joining part which joins the edge part of a bag body can be improved.

The second feature of civil bag of the present invention, the pair of edge portions, said end tip side so that the ends of the tubular fabric in the state of the double barrel inside the tubular fabric That is, it is formed of a portion folded back.

  According to this structure, since a pair of edge part which is in the state of a double cylinder is stitched | sutured by a 1st junction part, it can join and restrain so that a pair of edge part may be clamped more firmly.

The third feature of civil bag of the present invention further includes, first joining the second joint portion which is joined in a state combined closes the opening end of the tip side of the end portion of the tubular fabric The portion is constraining movement of the pair of edge portions in a direction away from each other so as to cover the second joint portion disposed inside the double cylinder.

  According to this configuration, since the opening end on the distal end side of the end portion of the tubular fabric is closed at the second joint portion, when the injection material is injected into the bag body, the leakage of the injection material from the end portion is prevented. It can prevent more reliably.

The fourth feature of civil bag of the present invention, the first joint is that joined the pair of edge portions to each other in a laminated state with each other.

  According to this configuration, when a pair of edge portions are joined in a state of being overlapped with each other, a force in the shear direction acts on the first joint portion when a force acts in a direction to separate the pair of edge portions from each other. In addition, it is possible to easily realize a configuration in which the pair of edge portions are restrained by bonding.

The fifth feature of civil bag of the present invention, the first joint is that it comprises a connecting element that both end portions are joined in a state of being superimposed on each of the pair of edge portions .

  According to this configuration, by joining the connecting element and the pair of edge portions in a state of being overlapped with each other, when a force acts in a direction separating the pair of edge portions from each other, a force in the shear direction is applied to the first joint portion. The structure which restrains a pair of edge part so that it may act can be implement | achieved easily.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. The bag body according to the embodiment of the present invention is a civil engineering bag body used in civil engineering work, and can be widely applied in various civil engineering work using a bag body into which an injection material is injected. . For example, it can be used in many various civil works such as a preload shell method. In addition, various injection materials, such as concrete, mortar, and cement milk, can be widely used as the injection material injected into the civil engineering bag of the present embodiment.

  Moreover, the civil engineering bag body of this embodiment is comprised as a bag body, for example by closing the edge part of a seamless tubular textile fabric by stitching. FIG. 1 is a perspective view illustrating a seamless tubular fabric 1 (hereinafter referred to as a tubular fabric 1). The tubular woven fabric 1 shown in FIG. 1 is woven so that the body portion 2 extends with the same diameter, and the open ends 3 on the respective distal end sides of both end portions thereof are not closed. The civil engineering bag of the present embodiment is configured by closing the end of the tubular fabric 1 by stitching. The present invention can also be applied to a bag body joined by means other than sewing (for example, adhesion, welding, etc.), and can be applied to a tubular woven fabric with a seam. Moreover, this embodiment is applicable also to the cylindrical fabric which is not woven so that it may extend with the same diameter. For example, the present embodiment can be applied to various tubular fabrics such as different diameter tubular fabrics woven so that the body portion has a large diameter and both end portions have a small diameter. Hereinafter, the civil engineering bag according to this embodiment will be described separately in the first to fourth embodiments.

(First embodiment)
FIG. 2 is a schematic diagram for explaining a civil engineering bag 11 (hereinafter also referred to as bag 11) according to the first embodiment of the present invention. 2A shows a cross section of the bag 11 in the middle of manufacturing, and FIG. 2B shows a cross section of the bag 11 in the completed state. As shown in FIG. 2B, the bag body 11 includes a cylindrical body portion 21 and end portions 22 at both ends (only one end is shown in FIG. 2). A first sewing portion (first joint portion) 23 and a second sewing portion (second joint portion) 24 are formed at the end 22 of the bag body 11.

  The bag 11 is formed by closing the end of the tubular fabric 1 (see FIG. 1) by sewing (it can be joined by means other than sewing, for example, adhesion or welding). In the manufacture of the bag 11, first, as shown in FIG. 2A, the second sewing portion 24 is formed. Then, as shown in FIG. 2 (b), after the second sewing portion 24 is folded back inside the tubular fabric 1, the first sewing portion 23 is formed as shown in FIG. 2 (c). . In addition, the injection port (not shown) for inject | pouring an injection material in the bag body 11 is attached to the predetermined location of the trunk | drum part 21, for example.

  The 2nd sewing part 24 is formed by sewing in the state which closed the opening end 3 (refer FIG. 1) of the front end side in the edge part of the cylindrical textile fabric 1 together. For example, as shown in FIG. 2A, the tubular fabric 1 is sewn in a state where it is folded once while the opening end 3 on the distal end side is closed.

  Further, the first sewing portion 23 is formed by sewing together a pair of edge portions 25, 25 that are located at opposite positions at the end portion 22. By the first sewing portion 23, the movement of the pair of edge portions 25, 25 in the direction away from each other is restricted by the sewing. By forming the first sewing portion 23 in this manner, the first sewing portion 23 is formed when a force is applied to the pair of edge portions 25 and 25 in a direction away from each other. The pair of edge portions 25 and 25 are restrained by stitching so that a shearing force acts on the sewing thread 26. As shown in FIG. 2 (b), the pair of edge portions 25, 25 has the second sewing portion on the inside of the body portion 21 so that the end portion 22 of the tubular fabric 1 is in a double tube state. It is folded and formed. Then, the first sewing portion 23 is sewn in a state where the tips of the pair of edge portions 25 and 25 are overlapped with each other so as to cover the second sewing portion 24 disposed inside the double cylinder. Is formed.

  As described above, the bag body 11 described above is used in various civil engineering operations. For example, by injecting various injection materials such as cement milk and mortar from an injection port (not shown), the bag body 11 can be used for various civil engineering operations. It will be used accordingly.

  According to the civil engineering bag body 11, when the injection material is injected and a force in a direction separating the pair of edge portions 25 and 25 is applied, the sewing thread 26 forming the first sewing portion 23 is applied to the sewing thread 26. On the other hand, the force in the shearing direction acts, and the force acting in the direction in which the pair of edge portions 25 and 25 are separated, that is, the direction in which the seam is opened can be greatly reduced. For this reason, the pair of edge portions 25 and 25 can be firmly held in a restrained state, and sewing is performed at a pressure lower than the injection pressure of the injection material reaches the breaking pressure of the base fabric constituting the bag body 11. It is possible to prevent the thread 26 from being cut or the seam from being loosened. Therefore, it is possible to improve the pressure resistance of the sewing portion that stitches the end portion 22 of the bag body 11 when the injection material is injected.

  Moreover, according to this civil engineering bag 11, since the opening end 3 on the distal end side of the end portion 22 of the tubular fabric 1 is closed at the second sewing portion 24, leakage of the injection material from the end portion 22 is prevented. It can prevent more reliably.

(Second Embodiment)
Next, the civil engineering bag 12 according to the second embodiment of the present invention will be described. FIG. 3 is a schematic diagram for explaining a civil engineering bag body 12 (hereinafter also referred to as a bag body 12) according to the second embodiment, and shows a cross section of the bag body 12. As shown in FIG. 3, the bag body 12 includes a cylindrical body portion 31 and end portions 32 at both end portions (only one end portion is shown in FIG. 3). A first sewing portion (first joint portion) 33 and a second sewing portion (second joint portion) 34 are formed at the end portion 32 of the bag body 12.

  The 2nd sewing part 34 is formed similarly to the 2nd sewing part 24 of the bag 11 of 1st Embodiment. That is, it is formed by suturing in a state where the opening end 3 on the distal end side of the tubular woven fabric 1 is closed and then folded back. Further, the first sewing portion 33 is constituted by a stitching portion 37 and a connecting fabric 38. The connecting fabric 38 constitutes a connecting element that connects a pair of edge portions 35.35 located at positions opposed to each other at the end portion 32. Then, both end portions of the connecting fabric 38 are stitched by the stitching portions 37 and 37 in a state where the both ends are overlapped with the pair of edge portions 35 and 35, respectively. By forming the first sewing portion 33 in this way, the sewing forming the sewing portion 37 of the first sewing portion 33 when a force acts in a direction away from each other with respect to the pair of edge portions 35. The pair of edge portions 35 and 35 are restrained so that a shearing force acts on the yarn 36.

  Note that the pair of edge portions 35 and 35 are formed by portions where the tip side is bent inward so that the end portion 32 is in a double cylinder state, as in the case of the bag body 11. Then, the pair of edge portions 35 and 35 are sewn in a state of being overlapped with both end portions of the connecting fabric 38 so as to cover the second sewing portion 34 disposed inside the double cylinder, One sewing portion 33 is formed.

  The bag body 12 described above is also used in civil engineering work in the same manner as the bag body 11. For example, various injection materials such as cement milk and mortar are injected from an injection port (not shown) so that the bag body 12 can be used for various civil engineering works. It will be used accordingly. The bag body 12 can also provide the same effects as the bag body 11.

(Third embodiment)
Next, a civil engineering bag 13 according to a third embodiment of the present invention will be described. FIG. 4 is a partial perspective view of a civil engineering bag body 13 (hereinafter also referred to as a bag body 13) according to the third embodiment, and FIG. 5 is a view of the bag body 13 viewed from one end side. is there. As shown in FIGS. 4 and 5, the bag body 13 includes a cylindrical body portion 41 and end portions 42 at both ends (only one end portion is shown in FIG. 4). The end portion 42 is formed with a sewing portion 43 constituting the third joint portion of the present embodiment.

  The bag body 13 is formed by closing the end of the tubular woven fabric 1 (see FIG. 1) by stitching, similarly to the bag bodies 11 and 12. That is, the end portion 42 is closed by the sewing portion 43. An injection port (not shown) for injecting the injection material is appropriately attached to a predetermined portion of the body portion 41 or the like.

  Further, as shown in FIGS. 4 and 5, the sewing portion 43 is provided so as to form four ridges (gathers) 44 at the end portion 42. Then, a plurality of pairs (four pairs) of edge portions 45 and 45 in the end portion 42 of the tubular fabric 1 are sewn together with the sewing thread 46 closed. Further, the four heels 44 formed by providing the sewing portion 43 are arranged in a radial manner so as to have a point-symmetrical arrangement and a line-symmetrical arrangement. In addition, the process which provides the closing part 47 which stitches together this gathering part in the cross shape is given to the gathering part where the four collars 44 arranged radially are gathered.

  The bag body 13 described above is also used in civil engineering work in the same manner as the bag bodies 11 and 12, and, for example, by injecting various injection materials such as cement milk and mortar from an inlet (not shown), It will be used according to the application.

  In the civil engineering bag 13, the end of the bag 13 is sewn in a state in which a plurality of pairs of edge portions 45 and 45 are closed so as to form four ridges 44 at the end 42 of the bag 13. By closing the portion 42, the average radius of curvature of the curved portion 48 (see FIG. 5) formed in the end portion 42 can be reduced (the average curvature can be increased). For this reason, the stress which arises in each curved part 48 formed in the edge part 42 can be reduced by providing the four collars 44. Thereby, it can suppress that the sewing thread | yarn 46 break | disconnects or the seam loosens with a pressure smaller than the injection | pouring pressure of an injection material reaches the fracture | rupture pressure of the base fabric which comprises the bag body 13. FIG. Therefore, it is possible to improve the pressure resistance of the sewing portion that stitches the end portion of the bag body when the injection material is injected.

  When three or more ridges are not formed at the end of the bag, that is, when the opening end of the bag is simply closed, the radius of curvature of the curved portion formed at the end of the bag is It becomes a large radius depending on the caliber of the bag body. However, by forming three or more ridges at the end of the bag, the radius of curvature of the curved portion formed at the end of the bag can be reduced, and the stress acting on the end can be reduced. Can do. In addition, the stress which arises in the curved part formed in the edge part of a bag body can be considered similarly to the axial direction and circumferential direction stress which arise in a thin cylinder. That is, it can be considered that the stress generated in the bending portion is approximately proportional to the curvature radius of the bending portion and the internal pressure acting on the bending portion. Therefore, the stress which arises in an edge part can be reduced by providing three or more ridges in an edge part, and making the curvature radius of each curved part small.

  Further, according to the civil engineering bag 13, the four ridges 44 arranged radially are arranged so as to have a point-symmetrical arrangement and a line-symmetrical arrangement, so that each curvature radius in the curved part 48 formed on the end part 42 is almost equal. It can be made smaller so as to be uniform, and the radius of curvature can be prevented from locally increasing.

(Fourth embodiment)
Next, a civil engineering bag 14 according to a fourth embodiment of the present invention will be described. FIG. 6 is a view of a civil engineering bag body 14 (hereinafter also referred to as a bag body 14) according to the fourth embodiment as viewed from one end side, and FIG. It is the schematic diagram which showed the cross section in a state. As shown in FIGS. 6 and 7, the bag body 14 includes a cylindrical body portion 51 and end portions 52 at both end portions (only one end portion is shown in FIGS. 6 and 7). Moreover, the sewing part 53 which comprises the 3rd junction part of this embodiment, and the sewing part 59 which comprises the 4th junction part of this embodiment are formed in the edge part 52 of this bag body 14. As shown in FIG.

  The bag body 14 is formed by closing the end of the tubular fabric 1 (see FIG. 1) by sewing. In manufacturing the bag body 14, first, as shown in FIG. 7A, a sewing portion 59 is formed. Then, a sewing portion 53 is formed as shown in FIG. 6 in a state where the sewing portion 59 is folded back inside the tubular fabric 1 as shown in FIG. An injection port (not shown) for injecting the injection material is appropriately attached to a predetermined portion of the body portion 41 or the like.

  The sewing part 59 is formed by sewing in a state in which the opening end 3 (see FIG. 1) on the distal end side at the end of the tubular fabric 1 is closed. For example, as shown in FIG. The woven fabric 1 is sewn in a state of being folded back while the open end 3 of the woven fabric 1 is closed. Moreover, the sewing part 53 is provided so that the four reeds (gather) 54 may be formed in the edge part 52 similarly to the sewing part 43 of the bag 13 of 3rd Embodiment (refer FIG. 6). The sewing portion 53 is provided so that a plurality of pairs (four pairs) of edge portions 55 and 55 in the end portion 52 of the tubular fabric 1 are sewn together with a sewing thread 56 closed. Further, the four heels 54 formed by providing the sewing portion 53 are radially arranged so as to have a point-symmetrical arrangement and a line-symmetrical arrangement.

  The four pairs of edge portions 55 and 55 are formed of bent portions formed by folding the tip side inward so that the end portion 52 of the tubular fabric 1 becomes a double tube (see FIG. 7B). . Then, a plurality of pairs of edge portions 55 and 55 are sewn together so as to cover the sewing portion 59 arranged inside the double cylinder, and the sewing portion 53 is formed. .

  The bag body 14 described above is used in civil engineering work in the same manner as the bag bodies 11 to 13, and various injection materials such as cement milk and mortar are injected from an injection port (not shown), so that it can be used for various civil engineering works. It will be used accordingly. And since this bag 14 is formed with four (three or more) ridges 54 at the end 52, similarly to the bag 13, the average radius of curvature at the curved portion 58 (see FIG. 6). Can be reduced, and the stress generated in the end portion 52 can be reduced. Therefore, it is possible to improve the pressure resistance of the sewing portion that stitches the end portion of the bag body when the injection material is injected.

  Moreover, according to this bag 14, since the opening end 3 on the front end side of the tubular fabric 1 is closed by the sewing portion 59, the leakage of the injection material from the end portion 52 can be prevented more reliably. .

  Further, in the bag body 14, a restraining member for restraining the movement of the plurality of pairs of edge portions 55 and 55 in the opening direction of the collar 54 is further provided in the vicinity of the gathering section where the four collars 54 arranged radially are gathered. Can be provided.

  FIG. 8 is a diagram illustrating a case where a plurality of bolts 61 and nuts 62 that are attached so as to close a plurality of pairs of edge portions 55 and 55 are provided as the restraining member, and a side surface corresponding to FIG. It is shown as a diagram. In this way, it is possible to more firmly restrain the plurality of pairs of edge portions 55 and 55 from being opened only by a simple configuration in which the bolt 61 and the nut 62 are attached. FIG. 9 illustrates a case where a connecting belt 63 that connects the pair of intercostal portions 64 and 64 located at positions facing each other via the above-described collecting portion is provided as such a restraining member. Similarly to FIG. 8, it is shown as a plan view corresponding to FIG. In addition, in FIG. 9, the case where the both ends of the connection belt 63 are connected with the intercostal space portion 64 is illustrated. Thus, it can restrain more firmly so that the collar 54 may not be opened only by a simple configuration in which the collar portion 64 is coupled by the coupling belt 63. Therefore, as shown in FIGS. 8 and 9, by further providing a restraining member, the movement in the opening direction of the collar 54 is restrained, and the end portion 52 of the bag body 14 is sewn at the time of injecting the infusion. The pressure resistance of the part can be further improved.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made as long as they are described in the claims. For example, the following modifications may be made.

(1) In 1st and 2nd embodiment, the 2nd sewing part (2nd junction part) which closed the opening end of the front end side does not necessarily need to be provided. For example, after forming a 1st sewing part, you may close together suitably so that an opening part may not remain in an edge part. Moreover, in 1st and 2nd embodiment, a pair of edge part does not need to be formed by the front end side being turned inward so that an edge part may be in the state of a double cylinder.

(2) In 2nd Embodiment, the fabric for a connection which comprises a connection element may be comprised so that a pair of edge part may be respectively connected in multiple places. Moreover, it does not need to be formed of a fabric, and various connecting elements such as a belt-shaped member can be used.

(3) In the third and fourth embodiments, the number of ridges formed at the end may be any number as long as it is three or more. Further, the ridges formed at the end portions do not necessarily have to be arranged radially.

(4) In the fourth embodiment, as an example of the restraining member, a member made of a bolt and a nut and a member made of a connecting belt have been described.

It is the perspective view which illustrated the seamless tubular fabric. It is a schematic diagram for demonstrating the civil engineering bag which concerns on 1st Embodiment of this invention. It is a schematic diagram for demonstrating the civil engineering bag which concerns on 2nd Embodiment of this invention. It is a partial perspective view of the bag for civil engineering concerning a 3rd embodiment of the present invention. It is the figure which looked at the civil engineering bag shown in FIG. 4 from one end side. It is the figure which looked at the civil engineering bag which concerns on 3rd Embodiment of this invention from one edge part side. It is the schematic diagram which showed the cross section in the state in the middle of manufacture of the bag for civil engineering shown in FIG. It is a figure explaining the restraint member applied with respect to the civil engineering bag shown in FIG. It is a figure explaining the restraint member applied with respect to the civil engineering bag shown in FIG.

DESCRIPTION OF SYMBOLS 1 Tubular fabric 11 Civil engineering bag body 22 End part 23 1st sewing part (1st junction part)
24 Second sewing part (second joint part)
25 Edge

Claims (5)

A civil engineering bag made of tubular woven fabric,
A first joint that restrains the movement of the pair of edge portions at positions facing each other at at least one end of the tubular fabric in a direction away from each other;
The first joint portion has the pair of edge portions so that a force in a shearing direction acts on the first joint portion when a force acts on the pair of edge portions in a direction away from each other. A civil engineering bag characterized by being joined.   The pair of edge portions is formed by a portion formed by folding the end of the end portion into the inside of the tubular fabric so that the end portion of the tubular fabric is in a double tube state. The civil engineering bag according to claim 1. A second joining part joined in a state of closing the opening end on the front end side in the end part of the tubular fabric,
The first joint portion restrains the movement of the pair of edge portions in a direction away from each other so as to cover the second joint portion disposed inside the double cylinder. The civil engineering bag according to claim 2.   The civil engineering bag according to any one of claims 1 to 3, wherein the first joint portion is sewn in a state where the pair of edge portions overlap each other. The said 1st junction part is provided with the connection element joined in the state in which the both ends overlapped with each of a pair of said edge part, The Claim 1 thru | or 3 characterized by the above-mentioned. The civil engineering bag described.

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