Connecting member

Abstract

To provide a connecting member for use in a corrugated pipe, which can shorten the time for assembly work and reduce construction costs.SOLUTION: The present invention relates to a connecting member formed by cylindrically shaping a corrugated sheet that is folded into a U-shape and has flanges formed at both ends, with the flanges overlapped. The connecting member is used for a corrugated pipe in which a plurality of through holes formed in an upper flange, which is located on an upper side, and a plurality of through holes formed in a lower flange, which is located on a lower side, are formed at intervals along the corrugation direction, and they are disposed at overlapping positions when the upper flange and the lower flange are overlapped vertically. The connecting member connects the upper flange and the lower flange in a region where at least two of the plurality of through holes are formed, with the upper flange and the lower flange being overlapped vertically.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a connecting member used for a corrugated pipe suitable for use as a temporary drainage channel or the like at a construction site of civil engineering structures such as embankments or building structures.

Background Art

[0002] In the construction of civil engineering structures such as embankments, in order to prevent the collapse and outflow of the embankment due to running water or the like, a drainage channel as a so-called culvert is often constructed in the embankment. When constructing this drainage channel, a corrugated pipe made of corrugated steel plates is frequently used. This corrugated pipe is formed in a cylindrical shape by combining two semi-circular members (see, for example, Patent Document 1).

[0003] The corrugated pipe described in Patent Document 1 has a corrugated cross-sectional shape and has an upper piece and a lower piece whose cross-sectional shapes are each formed in a semi-circular arc shape. Flange portions are respectively formed along the axial direction of the corrugated pipe at both lower edges of the upper piece and both upper edges of the lower piece, and a plurality of through holes are formed in each flange portion along the axial direction of the corrugated pipe. Then, the upper piece and the lower piece are overlapped vertically with each other's flange portions, and the vertically overlapped flange portions are connected by bolts and nuts passed through the respective through holes, thereby forming a cylindrical shape.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In Patent Document 1, bolts and nuts are used as connecting members between the upper piece and the lower piece, and they are connected by passing bolts and nuts through all of the plurality of through-holes formed in each flange portion. However, the number of through-holes increases in proportion to the length of the corrugated pipe, and the longer the pipe is, the more time-consuming the assembly work becomes, and there is a problem that the construction work is troublesome. And, with the recent shortage of workers and aging of the workforce, it has been necessary to simplify the work and reduce the number of operations.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide a connecting member used for a corrugated pipe that can shorten the time of assembly work and reduce the construction cost.

Means for Solving the Problems

[0007] The connecting member according to the present invention is a connecting member in which a corrugated sheet bent into a U shape with flanges formed at both ends has the flanges overlapped in a cylindrical shape, and a plurality of through-holes formed in the upper flange, which is the flange located on the upper side, and a plurality of through-holes formed in the lower flange, which is the flange located on the lower side, are formed at intervals along the corrugation direction, and are used for a corrugated pipe arranged at a position where they overlap when the upper flange and the lower flange are overlapped vertically, and in a state where the upper flange and the lower flange are overlapped vertically, it connects the upper flange and the lower flange in a range where at least two of the plurality of through-holes are formed.

Effects of the Invention

[0008] According to the connecting member of the present invention, in a state where the upper flange and the lower flange of the corrugated sheet constituting the corrugated pipe are overlapped vertically, the upper flange and the lower flange in a range where at least two through holes out of a plurality of through holes are formed are connected. That is, since it is not necessary to connect all of the plurality of through holes by passing bolts and nuts therethrough as in the prior art, compared with the prior art, the time for the assembly work can be shortened, the work can be simplified and the number of operations can be reduced, so that the construction cost can be reduced.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

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Figure 23

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments will be described with reference to the drawings. Note that the embodiments are not limited by the content described below. Also, in the following drawings, the size relationships of the respective constituent members may be different from the actual ones.

[0011] Embodiment 1. FIG. 1 is a perspective view showing an example of use of a corrugated pipe 100 in which a connecting member 30 according to Embodiment 1 is used. FIG. 2 is a front view of the corrugated pipe 100 in which the connecting member 30 according to Embodiment 1 is used. FIG. 3 is a plan view of the upper member 10 of the corrugated pipe 100 in which the connecting member 30 according to Embodiment 1 is used. FIG. 4 is a plan view of the lower member 20 of the corrugated pipe 100 in which the connecting member 30 according to Embodiment 1 is used. FIG. 5 is an enlarged view of a part of the side surface of the corrugated pipe 100 in which the connecting member 30 according to Embodiment 1 is used.

[0012] Hereinafter, the configuration of the connecting member 30 according to Embodiment 1 and the corrugated pipe 100 in which it is used will be described with reference to the drawings. In the following description, for ease of understanding, terms indicating directions, such as "upper", "lower", "right", "left", "front", "rear", etc., are used as appropriate, but this is for the purpose of explanation, and these terms do not limit the embodiments. Also, in Embodiment 1, in a state where the connecting member 30 and the corrugated pipe 100 are viewed from the front, terms such as "upper", "lower", "right", "left", "front", "rear", etc. are used.

[0013] The corrugated pipe 100 to which the connecting member 30 according to Embodiment 1 is applied is used as a temporary drainage channel or the like at a construction site of a civil engineering structure such as an embankment or a building structure as shown in FIG. 1. As shown in FIGS. 2 to 4, the corrugated pipe 100 has an upper member 10 and a lower member 20 formed by bending a corrugated sheet such as a corrugated steel plate or a corrugated stainless steel plate, which has been corrugated, in an arc shape (U shape) in a direction (X direction) orthogonal to the corrugation direction (Z direction). Note that the upper member 10 and the lower member 20 may be semi-circular or U-shaped when viewed from the front.

[0014] The upper member 10 is formed by bending a corrugated sheet having ridges and valleys alternately connected in the flow path direction in an arc shape so as to be convex upward in a direction (X direction) orthogonal to the corrugation direction (Z direction). The upper member 10 also includes an upper curved portion 11 curved in an arc shape so as to be convex upward, and upper flanges 12 provided at both ends in a direction (X direction) orthogonal to the corrugation direction (Z direction) of the upper curved portion 11 and protruding outward. A plurality of through holes 14 on the curved portion side are formed at both ends of the upper curved portion 11 in the corrugation direction (Z direction) at intervals along the direction (X direction) orthogonal to the corrugation direction (Z direction). The upper flange 12 also has a corrugated shape in which ridges and valleys are alternately connected in the flow path direction, and a plurality of through holes 13 are formed in the upper flange 12 at intervals along the corrugation direction (Z direction). Note that the number of through holes 13 formed in the two upper flanges 12 may be the same (for example, 15 for both), or different (for example, 15 for one and 16 for the other).

[0015] The lower member 20 is formed in an arc shape that is convex downward by curving a corrugated sheet with mountain portions and valley portions alternately connected in the flow path direction in a direction (X direction) orthogonal to the corrugating direction (Z direction). Further, the lower member 20 includes a lower curved portion 21 that is curved in an arc shape so as to be convex downward, and lower flanges 22 that are provided at both ends in a direction (X direction) orthogonal to the corrugating direction (Z direction) of the lower curved portion 21 and protrude outward. A plurality of curved portion side through holes 24 are formed at both ends of the lower curved portion 21 in the corrugating direction (Z direction) at intervals along the direction (X direction) orthogonal to the corrugating direction (Z direction). The lower flange 22 also has a corrugated shape in which mountain portions and valley portions are alternately connected in the flow path direction, and a plurality of through holes 23 are formed in the lower flange 22 at intervals along the corrugating direction (Z direction). Note that the number of through holes 23 formed in the two lower flanges 22 may be the same (for example, 15 in both cases) or different (for example, 15 in one and 16 in the other).

[0016] The plurality of through holes 13 of the two upper flanges 12 and the plurality of through holes 23 of the two lower flanges 22 are arranged at positions where they overlap when the upper flanges 12 and the lower flanges 22 are superposed vertically (Y direction). The corrugated pipe 100 is in a state where the upper flange 12 of the upper member 10 arranged on the upper side and the lower flange 22 of the lower member 20 arranged on the lower side are superposed vertically (Y direction), and as shown in FIG. 5, the upper flange 12 and the lower flange 22 superposed vertically (Y direction) are connected by a plurality of connecting members 30 described later. By doing so, as shown in FIG. 2, a corrugated pipe 100 having a cylindrical shape is formed when viewed from the front.

[0017] Further, a plurality of curved portion side through holes 14 at both ends in the direction (Z direction) in which the crests and troughs of the upper curved portion 11 are alternately connected are arranged at positions that overlap when one end portion of the upper curved portion 11 of one of the two upper members 10 and the other end portion of the upper curved portion 11 of the other upper member 10 are vertically (Y direction) overlapped. Similarly, a plurality of curved portion side through holes 24 at both ends in the direction (Z direction) in which the crests and troughs of the lower curved portion 21 are alternately connected are arranged at positions that overlap when one end portion of the lower curved portion 21 of one of the two lower members 20 and the other end portion of the lower curved portion 21 of the other lower member 20 are vertically (Y direction) overlapped. The corrugated pipe 100 is connected through bolts and nuts to the plurality of curved portion side through holes 14 in a state where one end portion of the upper curved portion 11 of the upper member 10 and the other end portion of the upper curved portion 11 of another upper member 10 are vertically (Y direction) overlapped. Similarly, the corrugated pipe 100 is connected through bolts and nuts to the plurality of curved portion side through holes 24 in a state where one end portion of the lower curved portion 21 of the lower member 20 and the other end portion of the lower curved portion 21 of another lower member 20 are vertically (Y direction) overlapped. By connecting the plurality of upper members 10 to each other and the plurality of lower members 20 to each other in this way, the corrugated pipe 100 can be extended in the axial direction (Z direction).

[0018] FIG. 6 is a perspective view of the connecting member 30 according to Embodiment 1. FIG. 7 is a front view of the connecting member 30 according to Embodiment 1. Next, the connecting member 30 according to Embodiment 1 will be described. The connecting member 30 is formed by overlapping flanges at both ends of a corrugated sheet bent in a U shape into a cylindrical shape. As shown in FIGS. 6 and 7, the connecting member 30 is a corrugated sheet such as a corrugated steel plate or a corrugated stainless steel plate that has been corrugated and has a rectangular shape in plan view. However, the shape of the connecting member 30 is not limited to the above. The connecting member 30 has a main body portion 31 having a wave shape in which the peak portions 31a and the valley portions 31b are alternately connected, and a plurality of protrusions formed at intervals along the direction (Z direction) in which the peak portions 31a and the valley portions 31b of the main body portion 31 are alternately connected. The plurality of protrusions are composed of a first protrusion 33 and a second protrusion 34. The first protrusion 33 is provided at one end in the direction (Z direction) in which the peak portions 31a and the valley portions 31b of the main body portion 31 are alternately connected, and protrudes laterally from the one end. The second protrusion 34 protrudes upward from the other end in the direction (Z direction) of the peak portion 31a of the main body portion 31, or the peak portion 31a and the valley portion 31b alternately connected. The plurality of protrusions are respectively inserted into the plurality of through holes 13 of the upper flange 12 and the plurality of through holes 23 of the lower flange 22. In FIG. 6, the number of the second protrusions 34 is three, but it is not limited thereto, and may be one or more.

[0019] FIG. 8 is a first perspective view for explaining the attachment method of the connecting member 30 according to Embodiment 1. FIG. 9 is a second perspective view for explaining the attachment method of the connecting member 30 according to Embodiment 1. FIG. 10 is a perspective view showing a state in which the connecting member 30 according to Embodiment 1 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. FIG. 11 is a front view showing a state in which the connecting member 30 according to Embodiment 1 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. Next, the attachment method of the connecting member 30 will be described.

[0020] First, as shown in FIG. 8, the connecting member 30 is disposed below the lower flange 22 (in the Y direction). Next, as indicated by the white arrow in FIG. 8, one end side of the connecting member 30 where the first protrusion 33 is provided is moved toward the upper flange 12 and the lower flange 22, and the first protrusion 33 is inserted into the through holes 13 and 23. Thereafter, the other end side of the connecting member 30 is moved toward the upper flange 12 and the lower flange 22, and as shown in FIG. 9, the second protrusion 34 is inserted into the through holes 13 and 23. At this time, the connecting member 30 is arranged such that the ridge portion 31a of the connecting member 30 overlaps with the ridge portions of the upper flange 12 and the lower flange 22, and the groove portion 31b of the connecting member 30 overlaps with the groove portions of the upper flange 12 and the lower flange 22. Finally, as shown in FIGS. 10 and 11, the second protrusion 34 is bent laterally. In this way, by bending the second protrusion 34 laterally after inserting it into the through holes 13 and 23, it is possible to prevent the connecting member 30 from coming off from the upper flange 12 and the lower flange 22 (in the Y direction). In FIGS. 10 and 11, the second protrusion 34 is bent to the right side, but the present invention is not limited thereto, and the second protrusion 34 may be bent to the left side.

[0021] As described above, the connecting member 30 is attached to the upper flange 12 and the lower flange 22. And the connecting member 30 connects the upper flange 12 and the lower flange 22 in the range where the plurality of through holes 13 and 23 are formed in the corrugated direction (Z direction) of the upper flange 12 and the lower flange 22. By using the connecting member 30, it is not necessary to connect all of the plurality of through holes 13 and 23 by passing bolts and nuts therethrough as in the prior art. Therefore, compared with the prior art, the time for the assembly work can be shortened, the work can be simplified and the number of operations can be reduced, so that the construction cost can be reduced.

[0022] Note that only the connecting member 30 may be used to connect the upper flange 12 and the lower flange 22, or bolts and nuts may be used in combination.

[0023] In Embodiment 1, the first protrusion 33 of the connecting member 30 protrudes laterally from one end in the direction (Z direction) in which the ridges 31a and valleys 31b of the main body 31 are alternately connected. However, the present invention is not limited to this, and it may protrude upward like the second protrusion 34. However, it is easier to position the first protrusion 33 and the second protrusion 34 of the connecting member 30 with the plurality of through holes 13 and 23 of the upper flange 12 and the lower flange 22 when the first protrusion 33 of the connecting member 30 protrudes laterally from one end, and it is easier to attach the connecting member 30 to the upper flange 12 and the lower flange 22.

[0024] As described above, the connecting member 30 according to Embodiment 1 is a connecting member 30 in which a corrugated sheet bent into a U shape with flanges formed at both ends is overlapped in a cylindrical shape with flanges. The plurality of through holes 13 formed in the upper flange 12, which is the flange located on the upper side, and the plurality of through holes 23 formed in the lower flange 22, which is the flange located on the lower side, are formed at intervals along the corrugation direction, and are used for a corrugated pipe arranged at positions where they overlap when the upper flange 12 and the lower flange 22 are overlapped vertically. In a state where the upper flange 12 and the lower flange 22 are overlapped vertically (Y direction), it connects the upper flange 12 and the lower flange 22 in a range where at least two of the plurality of through holes 13 and 23 are formed.

[0025] The connecting member 30 according to Embodiment 1 also has a corrugated main body 31 in which ridges 31a and valleys 31b are alternately connected, and a plurality of protrusions that protrude from the ridges 31a of the main body 31 and are inserted into the plurality of through holes 13 and 23 of the upper flange 12 and the lower flange 22.

[0026] According to the connecting member 30 according to Embodiment 1, in a state where the upper flange 12 and the lower flange 22 are overlapped vertically (in the Y direction), the upper flange 12 and the lower flange 22 in a range where at least two of the plurality of through holes 13 and 23 are formed are connected. That is, since it is not necessary to connect them by passing bolts and nuts through all of the plurality of through holes as in the prior art, compared with the prior art, the time for the assembling work can be shortened, the work can be simplified and the number of operations can be reduced, so that the construction cost can be reduced.

[0027] Further, in the connecting member 30 according to Embodiment 1, among the plurality of protrusions, the first protrusion 33 provided at one end in the direction in which the peak portions 31a and the valley portions 31b are alternately continuous protrudes laterally from the one end, and the other second protrusion 34 protrudes upward. After the second protrusion 34 is inserted into the plurality of through holes 13 and 23 of the upper flange 12 and the lower flange 22, it is bent laterally.

[0028] According to the connecting member 30 according to Embodiment 1, by bending the second protrusion 34 laterally after inserting it into the through holes 13 and 23, it is possible to prevent the connecting member 30 from coming off the upper flange 12 and the lower flange 22. Further, since the first protrusion 33 protrudes laterally from one end of the connecting member 30, it is easy to position the first protrusion 33 and the second protrusion 34 of the connecting member 30 and the plurality of through holes 13 and 23 of the upper flange 12 and the lower flange 22, and it is easy to attach the connecting member 30 to the upper flange 12 and the lower flange 22.

[0029] Embodiment 2. Hereinafter, Embodiment 2 will be described. However, descriptions of the parts overlapping with Embodiment 1 will be omitted, and the same reference numerals will be given to the same parts or corresponding parts as those in Embodiment 1.

[0030] FIG. 12 is a perspective view of the connecting member 40 according to Embodiment 2. FIG. 13 is a front view of the connecting member 40 according to Embodiment 2. As shown in FIGS. 12 and 13, the connecting member 40 is a corrugated sheet such as a corrugated steel plate or a corrugated stainless steel plate that has been corrugated, and has a rectangular shape in plan view. However, the shape of the connecting member 40 is not limited to the above. The connecting member 40 has a main body portion 41 having a wave shape in which the peak portions 41a and the valley portions 41b are alternately connected, and a plurality of protrusions formed at intervals along the direction (Z direction) in which the peak portions 41a and the valley portions 41b of the main body portion 41 are alternately connected. The plurality of protrusions are composed of a first protrusion 43 and a second protrusion 44. The first protrusion 43 is provided on one peak portion 41a of the main body portion 41 and protrudes in the direction (X direction) in which the peak portion 41a extends from the peak portion 41a. The second protrusion 44 is provided on the valley portions 41b on both sides in the direction (Z direction) in which the peak portions 41a and the valley portions 41b of the first protrusion 43 are alternately connected, and protrudes in the direction (X direction) in which the valley portions 41b extend from those valley portions 41b. In FIGS. 12 and 13, the number of the first protrusions 43 is 1 and the number of the second protrusions 44 is 2, but it is not limited thereto. The number of the first protrusions 43 may be two or more, and the number of the second protrusions 44 may be three or more.

[0031] FIG. 14 is a first perspective view for explaining the attachment method of the connecting member 40 according to Embodiment 2. FIG. 15 is a second perspective view for explaining the attachment method of the connecting member 40 according to Embodiment 2. FIG. 16 is a perspective view showing a state in which the connecting member 40 according to Embodiment 2 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. FIG. 17 is a front view showing a state in which the connecting member 40 according to Embodiment 2 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. Next, the attachment method of the connecting member 40 will be described.

[0032] First, as shown in FIG. 14, arrange the connecting member 40 laterally (in the X direction) of the lower flange 22. Next, apply stress to the connecting member 40 to cause distortion, and in a curved state that bulges upward, move the connecting member 40 toward the upper flange 12 and the lower flange 22 as shown by the white arrow in FIG. 14. Then, as shown in FIG. 15, arrange the first protrusion 43 of the connecting member 40 above the crest of the upper flange 12 and the lower flange 22, and arrange the second protrusion 44 of the connecting member 40 below the trough of the upper flange 12 and the lower flange 22. Finally, as shown in FIGS. 16 and 17, push the connecting member 40 in only by pushing it toward the upper flange 12 and the lower flange 22. Then, by unloading the connecting member 40, since the curved connecting member 40 tries to return to its original state, the upper flange 12 and the lower flange 22 are clamped from above and below by the first protrusion 43 and the second protrusion 44 of the connecting member 40 due to its elastic force. Therefore, it is possible to prevent the connecting member 40 from coming off the upper flange 12 and the lower flange 22.

[0033] In the above manner, the connecting member 40 is attached to the upper flange 12 and the lower flange 22. And the connecting member 40 connects the upper flange 12 and the lower flange 22 in the range where a plurality of through holes 13 and 23 are formed in the corrugated direction (Z direction) of the upper flange 12 and the lower flange 22. By using the connecting member 40, it is not necessary to connect all of the plurality of through holes 13 and 23 by passing bolts and nuts therethrough as in the prior art. Therefore, compared with the prior art, the time for the assembly work can be shortened, the work can be simplified and the number of operations can be reduced, so that the construction cost can be reduced.

[0034] Also, in the connecting member 40 according to the second embodiment, when attaching to the upper flange 12 and the lower flange 22, the through holes 13 and 23 are not used. Therefore, all or part of the hole drilling processes performed on the upper flange 12 of the upper member 10 of the corrugated pipe 100 and the lower flange 22 of the lower member 20 can be omitted, and the manufacturing cost of the corrugated pipe 100 can be reduced. Note that by omitting only part of the hole drilling process, a smaller number of through holes 13 and 23 than usual are formed in the upper flange 12 and the lower flange 22. Therefore, the through holes 13 and 23 can be used for positioning, or a part of the upper flange 12 and the lower flange 22 can be connected with bolts and nuts. As an example of omitting only part of the hole drilling process, for example, the through holes 13 and 23 are formed only at both ends in the corrugation direction (Z direction) of the upper flange 12 and the lower flange 22, or the through holes 13 and 23 are formed skipping two or three in the corrugation direction (Z direction) of the upper flange 12 and the lower flange 22, etc.

[0035] Note that, for connecting the upper flange 12 and the lower flange 22, only the connecting member 40 may be used, or a combination of bolts and nuts etc. may be used.

[0036] Also, in the second embodiment, although the first protrusion 43 of the connecting member 40 is provided on the peak portion 41a of the main body portion 41 and the second protrusion 44 of the connecting member 40 is provided on the valley portion 41b of the main body portion 41, it is not limited thereto, and the first protrusion 43 may be provided on the valley portion 41b of the main body portion 41 and the second protrusion 44 may be provided on the peak portion 41a of the main body portion 41.

[0037] FIG. 18 is a perspective view of a connecting member 40A according to a modification of Embodiment 2. FIG. 19 is a front view of the connecting member 40A according to the modification of Embodiment 2. As shown in FIGS. 18 and 19, the connecting member 40A may be provided with a raised portion 45 on the second protrusion 44. This raised portion 45 is a protrusion inserted into the through holes 13 and 23. Further, the raised portion 45 is raised upward from the side where the second protrusion 44 protrudes (the upper side in the X direction in FIG. 18) toward the opposite side (the lower side in the X direction in FIG. 18). That is, the raised portion 45 becomes higher as it goes from the side where the second protrusion 44 protrudes (the upper side in the X direction in FIG. 18) toward the opposite side (the lower side in the X direction in FIG. 18). Regarding other configurations of the connecting member 40A, they are the same as those of the connecting member 40.

[0038] FIG. 20 is a first perspective view for explaining a mounting method of the connecting member 40A according to a modification of Embodiment 2. FIG. 21 is a second perspective view for explaining the mounting method of the connecting member 40A according to the modification of Embodiment 2. FIG. 22 is a perspective view showing a state where the connecting member 40A according to the modification of Embodiment 2 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. FIG. 23 is a front view showing a state where the connecting member 40A according to the modification of Embodiment 2 is attached to the upper flange 12 of the upper member 10 and the lower flange 22 of the lower member 20 of the corrugated pipe 100. Next, the mounting method of the connecting member 40A will be described.

[0039] First, as shown in FIG. 20, the connecting member 40A is arranged on the side (X direction) of the lower flange 22. Next, stress is applied to the connecting member 40A to cause distortion, and in a curved state that bulges upward, the connecting member 40A is moved toward the upper flange 12 and the lower flange 22 as indicated by the white arrow in FIG. 20. Then, as shown in FIG. 21, the first protrusion 43 of the connecting member 40A is arranged above the peak portions of the upper flange 12 and the lower flange 22, and the second protrusion 44 of the connecting member 40A is arranged below the valley portions of the upper flange 12 and the lower flange 22. Finally, as shown in FIGS. 22 and 23, the connecting member 40A is pushed in only as far as it can be pushed toward the upper flange 12 and the lower flange 22. Then, by unloading the connecting member 40A, since the curved connecting member 40A tries to return to its original state, the upper flange 12 and the lower flange 22 are clamped from above and below by the first protrusion 43 and the second protrusion 44 of the connecting member 40A due to its elastic force. Further, the raised portion 45 is fitted into the through holes 13 and 23. Specifically, the raised portion 45 is raised upward from the side in the moving direction (upper side in the X direction in FIG. 20) when the connecting member 40A is attached toward the opposite side (lower side in the X direction in FIG. 20). Therefore, when the connecting member 40A is pushed toward the upper flange 12 and the lower flange 22, the raised portion 45 is pushed downward by the lower flange 22. In that state, when the connecting member 40A is further pushed toward the upper flange 12 and the lower flange 22 and the raised portion 45 reaches the positions of the through holes 13 and 23, it returns to its original state and fits into the through holes 13 and 23. Therefore, the raised portion 45 can be easily fitted into the through holes 13 and 23, and further suppression of the connecting member 40A coming off from the upper flange 12 and the lower flange 22 can be achieved.

[0040] As described above, the connecting members 40 and 40A according to Embodiment 2 are formed by bending a corrugated sheet that is bent into a U shape with flanges formed at both ends into a cylindrical shape with the flanges overlapped. A plurality of through holes 13 formed in the upper flange 12, which is the upper flange located on the upper side, and a plurality of through holes 23 formed in the lower flange 22, which is the lower flange located on the lower side, are formed at intervals along the corrugation direction. They are used for a corrugated pipe arranged at positions where they overlap when the upper flange 12 and the lower flange 22 are overlapped vertically. In a state where the upper flange 12 and the lower flange 22 are overlapped vertically (in the Y direction), the upper flange 12 and the lower flange 22 in the range where at least two of the plurality of through holes 13 and 23 are formed are connected.

[0041] Further, the connecting members 40 and 40A according to Embodiment 2 include a main body portion 41 having a corrugated shape in which the peak portions 41a and the valley portions 41b are alternately connected, a first protrusion portion 43 protruding in the direction (X direction) in which the peak portion 41a extends from the peak portion 41a of the main body portion 41, and second protrusion portions 44 provided on both sides of the main body portion 41 in the direction (Z direction) in which the peak portions 41a and the valley portions 41b of the first protrusion portion 43 are alternately connected, protruding in the direction in which the valley portion 41b extends from the valley portion 41b. The upper flange 12 and the lower flange 22 are sandwiched between the first protrusion portion 43 and the second protrusion portion 44. Alternatively, the connecting members 40 and 40A according to Embodiment 2 include a main body portion 41 having a corrugated shape in which the peak portions 41a and the valley portions 41b are alternately connected, a first protrusion portion 43 protruding in the direction (X direction) in which the valley portion 41b extends from the valley portion 41b of the main body portion 41, and second protrusion portions 44 provided on both sides of the main body portion 41 in the direction (Z direction) in which the peak portions 41a and the valley portions 41b of the first protrusion portion 43 are alternately connected, protruding in the direction in which the peak portion 41a extends from the peak portion 41a. The upper flange 12 and the lower flange 22 are sandwiched between the first protrusion portion 43 and the second protrusion portion 44.

[0042] According to the connecting members 40 and 40A according to the second embodiment, in a state where the upper flange 12 and the lower flange 22 are overlapped vertically (in the Y direction), the upper flange 12 and the lower flange 22 in a range where at least two of the plurality of through holes 13 and 23 are formed are connected. That is, since it is not necessary to connect them by passing bolts and nuts through all of the plurality of through holes as in the prior art, compared with the prior art, the time for the assembly work can be shortened, the work can be simplified and the number of operations can be reduced, so that the construction cost can be reduced.

[0043] Further, the connecting member 40 according to the second embodiment is arranged with the first protrusion 43 above the peak portions of the upper flange 12 and the lower flange 22 and the second protrusion 44 below the valley portions of the upper flange 12 and the lower flange 22 in a state of being curved so as to be convex upward. Alternatively, the connecting members 40 and 40A according to the second embodiment are arranged with the first protrusion 43 below the valley portions of the upper flange 12 and the lower flange 22 and the second protrusion 44 above the peak portions of the upper flange 12 and the lower flange 22 in a state of being curved so as to be convex upward.

[0044] According to the connecting members 40 and 40A according to the second embodiment, the upper flange 12 and the lower flange 22 are clamped from above and below by the first protrusion 43 and the second protrusion 44 of the connecting members 40 and 40A by the elastic force with which the curved connecting members 40 and 40A try to return to the original state. Therefore, it is possible to prevent the connecting members 40 and 40A from coming off the upper flange 12 and the lower flange 22.

[0045] Further, in the connecting member 40A according to the second embodiment, the second protrusion 44 is provided with a raised portion 45 that fits into the plurality of through holes 13 and 23 of the upper flange 12 and the lower flange 22.

[0046] According to the connecting member 40A according to the second embodiment, since the raised portion 45 is fitted into the through holes 13 and 23 of the upper flange 12 and the lower flange 22, it is possible to further prevent the connecting member 40A from coming off the upper flange 12 and the lower flange 22.

Explanation of reference numerals

[0047] 10 Upper half member, 11 Upper curved portion, 12 Upper flange, 13 Through hole, 14 Curved portion side through hole, 20 Lower half member, 21 Lower curved portion, 22 Lower flange, 23 Through hole, 24 Curved portion side through hole, 30 Connecting member, 31 Main body portion, 31a Ridge portion, 31b Valley portion, 33 First protrusion portion, 34 Second protrusion portion, 40 Connecting member, 40A Connecting member, 41 Main body portion, 41a Ridge portion, 41b Valley portion, 43 First protrusion portion, 44 Second protrusion portion, 45 Raised portion, 100 Corrugated pipe.

Claims

1. A corrugated sheet bent in a U shape with flanges formed at both ends, which is a connecting member with the flanges overlapped in a cylindrical shape, A plurality of through holes formed in the upper flange, which is the flange located on the upper side, and a plurality of through holes formed in the lower flange, which is the flange located on the lower side, are formed at intervals along the corrugation direction, and are used for a corrugated pipe arranged at positions where they overlap when the upper flange and the lower flange are overlapped vertically, In a state where the upper flange and the lower flange are overlapped vertically, it connects the upper flange and the lower flange in a range where at least two of the plurality of through holes are formed. Connecting member.

2. A wavy main body portion in which ridges and valleys are alternately connected, A plurality of protrusions protruding from the ridges of the main body portion and inserted into the plurality of through holes of the upper flange and the lower flange. The connecting member according to claim 1.

3. Among the plurality of protrusions, the first protrusion provided at one end in the direction in which the ridges and valleys are alternately connected protrudes laterally from the one end, and the other second protrusions protrude upward. After the second protrusions are inserted into the plurality of through holes of the upper flange and the lower flange, they are bent laterally. The connecting member according to claim 2.

4. A main body portion having a wavy shape in which ridges and valleys are alternately connected, A first protrusion protruding from the ridge of the main body portion in the direction in which the ridge extends, Second protrusions provided on both sides of the main body portion in the direction in which the ridges and valleys of the first protrusion are alternately connected and protruding in the direction in which the valleys extend from the valleys, The upper flange and the lower flange are sandwiched between the first protrusion and the second protrusion. The connecting member according to claim 1.

5. In a state of being curved so as to be convex upward, the first protrusion is arranged above the ridges of the upper flange and the lower flange, and the second protrusion is arranged below the valleys of the upper flange and the lower flange. The connecting member according to claim 4.

6. A main body portion having a wavy shape in which ridges and valleys are alternately connected, A first protrusion protruding from the valley of the main body portion in the direction in which the valley extends, provided on both sides of the main body portion in the direction in which the peak portions and the valley portions of the first protrusion portion are alternately continuous, and having a second protrusion portion protruding in the direction in which the peak portion extends from the peak portion, the first protrusion portion and the second protrusion portion sandwich the upper flange and the lower flange The connecting member according to claim 1.

7. with the first protrusion portion disposed below the valley portion of the upper flange and the lower flange and the second protrusion portion disposed above the peak portion of the upper flange and the lower flange in a state of being curved so as to be convex upward The connecting member according to claim 6.

8. the second protrusion portion is provided with a raised portion that fits into the plurality of through holes of the upper flange and the lower flange The connecting member according to claim 6 or 7.

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