Scaffolding connecting device and method for scaffolding connecting device

Abstract

To provide a scaffolding connecting device capable of connecting to a scaffolding so as not to tilt the scaffolding, and a method for manufacturing the scaffolding connecting device.SOLUTION: A wall connector 30 connecting a building 10 and a scaffolding 20 arranged around the building 10 includes a long connecting member 31 having a first end fixed to the scaffolding 20 and a second end fixed to the building 10 and extending from the first end to the second end, and an orthogonal clamp 60 arranged on the first end side of the connecting member 31 and fixing the first end side to the scaffolding 20. On the first end side of the connecting member 31, a first flange portion 201 adjacent to the first end side of the orthogonal clamp 60 and restricting movement toward the first end side, and a second flange portion 202 adjacent to the second end side of the orthogonal clamp 60 and restricting movement toward the second end side are provided.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a scaffold connecting device for connecting a scaffold to a construction object and a method for manufacturing the scaffold connecting device.

Background Art

[0002] Conventionally, at construction sites such as building sites and demolition sites, scaffolds are installed for construction. At that time, a scaffold connecting device for connecting the scaffold to a construction object such as a building was used so that the scaffold would not collapse (for example, Patent Documents 1 to 3). The scaffold connecting device described in Patent Document 1 includes a rod-shaped main rod. The first end side of the main rod is connected to a scaffold frame pipe via a clamp. And on the second end side of the main rod, an external contact plate and an internal contact plate are provided so as to face each other. By sandwiching the outer wall of the edge of an opening such as a window of a building between the external contact plate and the internal contact plate from the inside and outside, the second end side is connected to the building. In this way, the scaffold connecting device connects the scaffold to the building. The scaffold connecting devices of Patent Documents 2 and 3 are the same.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in such a scaffolding connecting device, the connection to the building can be firmly made by the external backing plate and the internal backing plate, while the connection between the scaffolding frame pipe and the main pole is made only by a clamp. Since this clamp only tightens and fixes the tip of the main pole, for example, when a strong load is applied along the direction in which the main pole extends, such as when the scaffolding collapses to the side opposite to the building, there is a risk that the clamp will come off. Also, when a strong force is applied to the scaffolding toward the building side due to wind or the like, there is a possibility that the clamp will shift and the scaffolding will collapse toward the building side.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a scaffolding connecting device that can be connected to a scaffolding so that the scaffolding does not tilt, and a method for manufacturing the scaffolding connecting device.

Means for Solving the Problems

[0006] The means for solving the above problems is a scaffolding connecting device for connecting a construction object at a construction site and a scaffolding arranged around the construction object, having a first end fixed to the scaffolding and a second end fixed to the construction object, a long connecting member extending from the first end toward the second end, and a scaffolding-side clamp arranged on the first end side of the connecting member for fixing the first end side and the scaffolding. On the first end side of the connecting member, a first protrusion adjacent to the first end side of the scaffolding-side clamp and restricting movement to the first end side, and a second protrusion adjacent to the second end side of the scaffolding-side clamp and restricting movement to the second end side are provided.

[0007] Thereby, even when a large force is applied such that the scaffolding collapses in a direction away from the construction object, the scaffolding clamp can be locked to the first protrusion and prevented from coming off from the tip of the first end side of the connecting member. Thereby, the scaffolding can be surely connected.

[0008] Conversely, even when a force is applied such that the scaffold is pushed toward the object to be constructed, the scaffold clamp can engage with the second protrusion and prevent itself from shifting to the second end side of the connecting member. Therefore, it is possible to suppress the scaffold from tilting toward the object to be constructed due to a large displacement of the position of the scaffold clamp toward the second end side.

[0009] A second means for solving the above problems is a method for manufacturing a scaffold connecting device that connects an object to be constructed and a scaffold disposed around the object to be constructed at a construction site. The scaffold connecting device has a first end fixed to the scaffold and a second end fixed to the object to be constructed, and includes a long connecting member extending from the first end toward the second end. A clamp attachment step of attaching a scaffold-side clamp for fixing the first end side and the scaffold to the first end side of the connecting member, and a first protrusion that is adjacent to the first end side with the scaffold-side clamp as the center and restricts movement toward the first end side, and a second protrusion that is adjacent to the second end side with the scaffold-side clamp as the center and restricts movement toward the second end side, are attached to the first end side of the connecting member. In the protrusion attachment step, a hollow tube having the same inner diameter as the outer diameter of the connecting member is cut into rings to form rings, and the rings are welded or adhered to the outer peripheral surface of the connecting member to provide the protrusions.

[0010] Thereby, even when a large force is applied in a direction away from the object to be constructed such that the scaffold collapses, the scaffold clamp can engage with the first protrusion and prevent itself from coming off from the tip of the first end side of the connecting member. Thereby, it is possible to reliably connect the scaffold.

[0011] Conversely, even when a force is applied such that the scaffold is pushed toward the object to be constructed, the scaffold clamp can engage with the second protrusion and prevent itself from shifting to the second end side of the connecting member. Therefore, it is possible to suppress the scaffold from tilting toward the object to be constructed due to a large displacement of the position of the scaffold clamp toward the second end side.

[0012] In addition, a hollow tube having the same inner diameter as the outer diameter of the connecting member is cut into rings to form rings, and the rings are welded or adhered to the outer peripheral surface of the connecting member to provide protrusions. Therefore, it is not necessary to mold protrusions such as flanges with a mold, and it can be easily manufactured.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments in which the "scaffold connecting device" according to the present invention is embodied will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are denoted by the same reference numerals in the drawings, and the description of the parts with the same reference numerals is incorporated by reference.

[0015] As shown in FIG. 1, at a construction site such as a construction site, a demolition site, or a civil engineering site, a temporary scaffold 20 is installed around a building 10. The building 10, which is the object of the work, is the object of construction in the case of a construction site or a civil engineering site, and the object of demolition in the case of a demolition site. In the figure, the horizontal direction is indicated as the X direction, and the vertical direction is indicated as the Z direction.

[0016] On the outer wall 11 of the building 10, a window 12 is provided as an opening. The window 12 is composed of a window glass (not shown) and a sash provided so as to surround the window glass. The sash is composed of a frame and a window frame 13 as a frame of the opening, etc. The window frame 13 is provided so as to surround the opening, and is provided so as to project inward and outward in the horizontal direction (the vertical direction of the outer wall 11) from the outer wall 11. In FIG. 1, the right side of the outer wall 11 of the building 10 is the outside (outdoor) of the building 10, and the scaffold 20 is installed. Also, in FIG. 1, the left side of the outer wall 11 of the building 10 is the inside (indoor) of the building 10.

[0017] The scaffold 20 has a well-known configuration and includes, for example, a plurality of vertical struts 21, a horizontal scaffold pipe 22 fixed between the vertical struts 21, and a scaffold board (not shown) attached to the horizontal scaffold pipe 22, etc.

[0018] As shown in FIG. 1, the wall connection 30 as a scaffold connection device connects the building 10 and the scaffold 20 and fixes the scaffold 20 to the building 10 so that the scaffold 20 does not fall down. As shown in FIGS. 1 to 3, the wall connection 30 includes a connecting member 31 formed in a rod shape, an engaging member 32 that engages with the outer wall 11 of the building 10, a support member 33 that supports the engaging member 32, and a single clamp 34 as an attachment member (construction object side clamp) that attaches the engaging member 32 to the connecting member 31 via the support member 33.

[0019] The connecting member 31 is made of iron or steel and is composed of a long rod or pipe, etc. In this embodiment, the connecting member 31 assumes a steel pipe (so-called single pipe). The connecting member 31 is arranged so as to extend horizontally from the scaffold 20 toward the building 10. Of both ends of the connecting member 31, the first end (the right end in FIG. 1) is fixed by an orthogonal clamp 60 (scaffold side clamp) to the vertical strut 21 etc. of the scaffold 20.

[0020] As shown in FIGS. 1 and 6, the orthogonal clamp 60 is an orthogonal clamp having a ring portion 61 inserted into the first end side of the connecting member 31 or the vertical column 21, and a fastening portion 62 that reduces the diameter of the ring portion 61 and clamps the connecting member 31 or the vertical column 21 inserted into the ring portion 61. The orthogonal clamp 60 has a pair of the ring portion 61 and the fastening portion 62, and the ring portions 61 forming a pair are provided such that their insertion directions (hole directions) are orthogonal. The fastening portion 62 is composed of a nut 62a (female screw) and a bolt 62b (male screw) into which the nut is screwed, and is configured such that the ring portion 61 can be clamped by rotating and moving the nut 62a in a predetermined direction with respect to the bolt 62b.

[0021] Further, among both ends of the connecting member 31, the second end (the left end portion in FIG. 1) is inserted into the window 12 of the building 10. At this time, as shown in FIG. 1, the connecting member 31 is inserted into the window 12 of the building 10 such that the extending direction in which the connecting member 31 extends is parallel to the vertical direction (horizontal direction) of the outer wall 11. Also, as shown in FIG. 1, the connecting member 31 is disposed on the lower end side of the window 12. Note that the connecting member 31 may or may not be in contact with the window frame 13.

[0022] As shown in FIG. 2, the engaging member 32 is formed in an L shape so as to have a first portion 321 extending along the horizontal direction (that is, the extending direction of the connecting member 31) and a second portion 322 extending along the vertical direction (that is, the direction perpendicular to the extending direction). More specifically, the engaging member 32 is configured by bending a tubular square pipe having a square cross section into an L shape. Note that the engaging member 32 may be configured by welding a plurality of square pipes so as to form an L shape.

[0023] In this embodiment, the length dimension L1 of the first portion 321 in the horizontal direction is 160 mm, and the length dimension L2 of the second portion 322 in the vertical direction is 350 mm. Also, the width dimension L3 of the second portion 322 in the horizontal direction is 50 mm. The length dimension of the first portion 321 in the horizontal direction may be arbitrarily changed. For example, it may be arbitrarily changed within the range of 50 mm to 1000 mm, and preferably, it may be set within the range of 100 mm to 500 mm. Similarly, the length dimension of the second portion 322 in the vertical direction may be arbitrarily changed. For example, it may be arbitrarily changed within the range of 50 mm to 1000 mm, and preferably, it may be set within the range of 100 mm to 500 mm. Similarly, the width dimension of the second portion 322 in the horizontal direction may be arbitrarily changed. For example, it may be arbitrarily changed within the range of 20 mm to 80 mm.

[0024] This engaging member 32 is attached to the second end side of the connecting member 31 by a single clamp 34 via a support member 33 such that its first portion 321 is along (parallel to) the extending direction of the connecting member 31 and its second portion 322 is perpendicular to the extending direction of the connecting member 31.

[0025] As shown in FIG. 1, a pair of engaging members 32 are provided at the second end side of the connecting member 31. One engaging member 32a is arranged outside the building 10 in order to engage with the outer surface of the outer wall 11. And the other engaging member 32b is arranged inside the building 10 in order to engage with the inner surface of the outer wall 11.

[0026] The pair of engaging members 32a, 32b, the support member 33, and the single clamp 34 are attached to the connecting member 31 such that the pair of engaging members 32a, 32b are close to each other and the support member 33 and the single clamp 34 are spaced apart from each other. That is, the pair of engaging members 32a, 32b are attached such that their second portions 322 are close to each other in order to engage their second portions 322 with the outer wall 11 respectively.

[0027] As a result, for the engagement member 32a on the outdoor side, while its second portion 322 is disposed on the outer surface side (right side surface side) of the outer wall 11, its first portion 321 is disposed so as to extend in a direction away from the outer wall 11 to the outside (the side of the scaffold 20). Further, for the engagement member 32b on the indoor side, while its second portion 322 is disposed on the inner surface side (left side surface side) of the outer wall 11, its first portion 321 is disposed so as to extend in a direction away from the outer wall 11 to the inside (left side).

[0028] Also, the pair of engagement members 32a and 32b are attached to the connecting member 31 such that any surface constituting the second portion 322 is in surface contact with the outer wall 11. For this reason, the pair of engagement members 32a and 32b are attached to the connecting member 31 such that the surfaces of the second portions 322 of each other face each other.

[0029] As shown in FIG. 3, both end portions of the engagement member 32 are closed by welding the lid member 323. That is, the lower end portion of the second portion 322 and the end portion of the first portion 321 (the end portion on the side opposite to the second portion 322 (left side in FIG. 1)) are each closed.

[0030] Also, at the lower end portion (the tip portion of the second portion 322) of the engagement member 32, a plate member 324 as a thin plate-shaped metal fitting extending along the direction in which the second portion 322 extends (downward in this embodiment) is provided. This plate member 324 is provided so as to be flush with the contact surface of the engagement member 32 with the outer wall 11. The plate member 324 is fixed to the engagement member 32 by welding or cutting out or the like. An insertion hole 324a penetrating in the horizontal direction (the extending direction of the connecting member 31) is provided in this plate member 324. An anchor bolt 40 driven into the outer wall 11 is inserted into this insertion hole 324a. By this anchor bolt 40, the plate member 324 is fixed to the outer wall 11. As a result, the engagement member 32 is fixed to the outer wall 11 by the anchor bolt 40. Note that a rectangular single plate may be bent into an L shape to form the plate member 324 and the lid member 323, and welded to the lower end portion of the engagement member 32.

[0031] Next, the support member 33 will be described. The support member 33 is constituted by, for example, a tubular square pipe with a hollow cross-section and a square outer shape, and both ends are open. The horizontal length dimension L1 is 160 mm, and the thickness dimension L4 (the height dimension in the vertical direction) is 50 mm. Note that the horizontal length dimension of the support member 33 may be arbitrarily changed, for example, it may be arbitrarily changed within the range of 50 mm to 1000 mm, and preferably, it may be set within the range of 100 mm to 500 mm. Similarly, the height dimension of the support member 33 in the vertical direction may be arbitrarily changed, for example, it may be arbitrarily changed within the range of 20 mm to 80 mm.

[0032] The support member 33 supports the engagement member 32 such that the engagement member 32 is disposed at a predetermined first distance (50 mm in this embodiment) from the connection member 31. Further, the support member 33 is attached to the connection member 31 by a single clamp 34 at a position that is a predetermined second distance (50 mm in this embodiment) away from the contact portion with the outer wall 11 of the engagement member 32 in the extending direction in which the connection member 31 extends.

[0033] More specifically, in the vertical direction, the support member 33 is sandwiched between the first portion 321 of the engagement member 32 and the connection member 31, and in the horizontal direction, it is fixed to the first portion 321 by welding or the like at a position that is a predetermined second distance away from the contact portion (contact surface) with the outer wall 11 in the second portion 322. At this time, the lower end surface of the support member 33 is fixed so as to be in surface contact with the upper end surface of the first portion 321.

[0034] In other words, the engagement member 32 is attached to a position that is a first distance corresponding to the height dimension L4 of the support member 33 away from the connection member 31 by attaching the first portion 321 of the engagement member 32 to the connection member 31 by a single clamp 34 via the support member 33. Also, in this embodiment, the second distance is a distance corresponding to the width dimension L3 of the engagement member 32, but it may be arbitrarily changed. For example, it may be arbitrarily changed within the range of 20 mm to 80 mm.

[0035] Since it is configured in this way, a gap 50 is formed between the engaging member 32 and the connecting member 31 on the side of the outer wall 11 of the support member 33, which has a first distance in the vertical direction and a second distance in the horizontal direction. That is, as shown in FIG. 1, when the wall joint 30 is viewed from the side, in the L-shaped member composed of the engaging member 32 and the support member 33, the gap 50 is formed as if a notch is provided outside the corner portion. This gap 50 is formed in a stepped shape, that is, notched in a square shape along the vertical direction and the horizontal direction, when viewed from the side as shown in FIG. 1.

[0036] A single clamp 34 is fixed to the upper end surface of this support member 33, and the support member 33 (and the engaging member 32) is fixed to the connecting member 31 by the single clamp 34. A plurality (two in this embodiment) of single clamps 34 are provided and are arranged at different positions in the extending direction of the connecting member 31.

[0037] Note that a through hole 33a through which the mounting bolt 35 of the single clamp 34 is inserted is provided in the upper end surface of the support member 33. The mounting bolt 35 inserted through the through hole 33a is fixed inside the support member 33 by a nut 36. For this reason, the end portion of the support member 33 is open for attaching the single clamp 34. In this embodiment, both end portions of the support member 33 are opened, but if the single clamp 34 can be attached, only one of them may be opened. Also, after attaching the single clamp 34, the opening of the support member 33 may be closed with a lid member.

[0038] Next, a method of connecting the building 10 and the scaffold 20 by the wall joint 30 will be described.

[0039] First, insert the second end of the connecting member 31 through the window 12 of the building 10, and fix the first end to the scaffold 20 with the orthogonal clamp 60. When determining the vertical position of the connecting member 31, adjust the vertical position of the connecting member 31 so that the window frame 13 can be cleared into the gap 50 formed between the engaging member 32 and the connecting member 31 (so that the protruding portion of the window frame 13 is accommodated in the gap 50).

[0040] Next, adjust the position of the outdoor engaging member 32a in the extending direction (horizontal direction) so that its second portion 322 engages with the outer surface of the outer wall 11. At this time, adjust the positions of the engaging member 32a and its supporting member 33 so that the window frame 13 can be cleared into the gap 50 formed between the engaging member 32a and the connecting member 31 on the side of the outer wall 11 (left side) of the supporting member 33 (so that the protruding portion of the window frame 13 is accommodated in the gap 50). The same applies to the indoor engaging member 32b and its supporting member 33.

[0041] Thereafter, fix the positions of the engaging member 32 and the supporting member 33 by tightening the connecting member 31 with a plurality of single clamps 34. Then, fix the plate member 324 to the outer wall 11 with the anchor bolt 40, thereby fixing the lower end portion of the engaging member 32. Thereby, the connection between the building 10 and the scaffold 20 by the wall connection 30 is completed.

[0042] In the wall connection 30 of the present embodiment, the second end side of the connecting member 31 is fixed to the supporting member 33 via a plurality of single clamps 34 as described above, and is connected to the building 10 via the supporting member 33 and the engaging member 32. On the other hand, the first end side of the connecting member 31 is fixed to the vertical column 21 or the like by an orthogonal clamp 60 or the like as shown in FIG. 1 and the like. Here, the orthogonal clamp 60 is usually attached near the tip of the connecting member 31 so that the first end side of the connecting member 31 does not protrude into the scaffold 20 and interfere with the work.

[0043] Incidentally, as shown in Fig. 6, the orthogonal clamp 60 is an orthogonal clamp having a ring portion 61 inserted into the first end side of the connecting member 31 and a fastening portion 62 that reduces the diameter of the ring portion 61 and tightens the connecting member 31 inserted into the ring portion 61.

[0044] Therefore, when a large force (load) that causes the scaffold 20 to fall in a direction away from the building 10 (outer direction, right side in Fig. 1) due to its own weight or the like is applied to the scaffold 20, the orthogonal clamp 60 is pulled by the scaffold 20, and regardless of the fastening force of the fastening portion 62, the position of the ring portion 61 may move. And when there is nothing at the first end side of the connecting member 31, there is a possibility that the orthogonal clamp 60 may come off from the tip of the first end side of the connecting member 31.

[0045] Also, the single clamp 34 also has a ring portion 37 and a fastening portion 38, similar to the orthogonal clamp 60. For this reason, even if the second end of the connecting member 31 is fixed by a plurality of single clamps 34, if the connecting member 31 is pulled strongly to the right by the scaffold 20, the positions of the plurality of single clamps 34 may shift to the second end side. And when there is nothing at the second end side of the connecting member 31, there is a possibility that it may come off from the tip of the second end side of the connecting member 31.

[0046] Conversely, there may be a case where a force is applied to the scaffold 20 so that it is pushed toward the side of the building 10 (left side) due to the influence of wind or the like. In this case, if the position of the ring portion 61 is greatly shifted to the second end side with respect to the connecting member 31 together with the scaffold 20, the scaffold 20 may be greatly inclined toward the side of the building 10 (left side).

[0047] Therefore, in the wall connection 30 of the present embodiment, in order to securely fix the scaffold 20 and the wall connection 30 and prevent displacement, the devices shown in Figs. 1, 4 to 5 are provided. This will be described in detail below.

[0048] As shown in FIGS. 1 and 5, on the first end side of the connecting member 31, there are provided a first flange portion 201 as a first protrusion portion that is adjacent to the first end side with the ring portion 61 of the orthogonal clamp 60 as the center and restricts movement toward the first end side, and a second flange portion 202 as a second protrusion portion that is adjacent to the second end side with the ring portion 61 as the center and restricts movement toward the second end side. At this time, a predetermined interval L200 is provided between the first end of the connecting member 31 and the first flange portion 201. The predetermined interval L200 is arbitrary, but for example, it is set to 3 mm to 30 mm.

[0049] Also, as shown in FIGS. 1 and 4, on the second end side of the connecting member 31, a third flange portion 203 is provided on the second end side of the single clamp 34a disposed on the most second end side, and the single clamp 34 restricts movement toward the second end side as a third protrusion portion. At this time, a predetermined interval L201 is provided between the second end of the connecting member 31 and the third flange portion 203. The predetermined interval L201 is arbitrary, but for example, it is set to 3 mm to 30 mm.

[0050] The first flange portion 201, the second flange portion 202, and the third flange portion 203 (hereinafter collectively referred to as the flange portions 201 to 203) are provided so as to protrude radially from the outer peripheral surface, and are formed in an annular shape surrounding the outer peripheral surface of the connecting member 31. It should be noted that the height dimension protruding from the outer peripheral surface is preferably sufficient to lock the ring portions 37 and 61 when the clamps 34 and 60 are attached to the connecting member 31. On the other hand, when the diameter of the ring portions 37 and 61 is enlarged, it is desirable that the outer diameters of the flange portions 201 to 203 are smaller than the inner diameter of the ring portions 37 and 61. That is, when the clamps 34 and 60 are attached, the enlarged ring portions 37 and 61 are provided so as to be able to overcome the flange portions 201 to 203.

[0051] As shown in FIG. 1, in the connecting member 31, there is no other protrusion provided between the second flange portion 202 and the third flange portion 203 to restrict the movement of the single clamp 34. That is, the single clamp 34 is configured to be movable (shiftable) to the first end side in the position of the connecting member 31.

[0052] Here, a manufacturing method of the wall connection 30, more specifically, a manufacturing method of the flange portions 201 to 203 will be described. First, a step of forming a cylindrical ring by cutting a hollow tube (such as a single pipe) having an inner diameter the same as the outer diameter of the connecting member 31 is performed. Next, a protrusion attachment step of attaching the flange portions 201 to 203 by welding or bonding the ring to the outer peripheral surface of the connecting member 31 is performed.

[0053] In the extending direction of the connecting member 31, a welded portion 201a, which is a welding mark generated by welding, is provided only at the end portion of both ends of the first flange portion 201 on the side opposite to the orthogonal clamp 60. That is, only the end portion of both ends of the first flange portion 201 on the side opposite to the orthogonal clamp 60 is welded.

[0054] Similarly, in the extending direction of the connecting member 31, a welded portion 202a, which is a welding mark generated by welding, is provided only at the end portion of both ends of the second flange portion 202 on the side opposite to the orthogonal clamp 60. That is, only the end portion of both ends of the second flange portion 202 on the side opposite to the orthogonal clamp 60 is welded.

[0055] Similarly, in the extending direction of the connecting member 31, a welded portion 203a, which is a welding mark generated by welding, is provided only at the end portion of both ends of the third flange portion 203 on the side opposite to the single clamp 34. That is, only the end portion of both ends of the third flange portion 203 on the side opposite to the single clamp 34 is welded.

[0056] After attaching the flange portions 201 to 203, a clamp attachment step of attaching the clamps 34 and 60 is performed. Note that the order of these steps is arbitrary and can be changed. That is, it is sufficient that these steps are included.

[0057] The effects in the above embodiment will be described.

[0058] On the first end side of the connecting member 31, there are provided a first flange portion 201 adjacent to the first end side around the ring portion 61 of the orthogonal clamp 60 and a second flange portion 202 adjacent to the second end side around the ring portion 61. Thereby, even if a large force (load) that causes the scaffold 20 to fall in the direction away from the building 10 (outer direction, right side in FIG. 1) due to its own weight or the like is applied to the scaffold 20, the orthogonal clamp 60 can be locked to the first flange portion 201 and prevented from coming off from the tip of the first end side of the connecting member 31.

[0059] Conversely, even when a force is applied to the scaffold 20 such that it is pushed toward the building 10 (left side) due to the influence of wind or the like, the orthogonal clamp 60 can be locked to the second flange portion 202 and prevented from shifting to the second end side of the connecting member 31. For this reason, it is possible to prevent the position of the orthogonal clamp 60 from shifting greatly to the second end side and the scaffold 20 from tilting toward the building 10 (left side).

[0060] On the second end side of the connecting member 31, there is provided a third flange portion 203 that is provided on the second end side with respect to the single clamp 34 and restricts movement to the second end side. Thereby, even if the connecting member 31 is pulled outward (first end side), the single clamp 34 can be locked to the third flange portion 203 and prevented from coming off from the tip of the second end side of the connecting member 31.

[0061] Incidentally, the distance between the building 10 and the scaffold 20 may be appropriately changed according to the situation. Therefore, the distance between the single clamp 34 and the orthogonal clamp 60 may be changed. Thus, in the connecting member 31 of the present embodiment, no other protruding portions such as flange portions are provided between the third flange portion 203 and the second flange portion 202. Thereby, when the wall joint 30 is attached, it becomes possible to shift the position of the single clamp 34 toward the first end side according to the distance between the building 10 and the scaffold 20.

[0062] Each of the flange portions 201 to 203 forms a cylindrical ring by cutting a hollow tube (such as a single pipe) having the same inner diameter as the outer diameter of the connecting member 31 into a ring shape, and the ring is provided by welding or bonding to the outer peripheral surface of the connecting member 31. Thereby, it is not necessary to mold a protruding portion such as a flange with a mold, and the flange portions 201 to 203 can be easily formed.

[0063] In the extending direction of the connecting member 31, welding portions 201a to 203a are provided by welding the ends of the flange portions 201 to 203 (more specifically, the cylindrical rings constituting the flange portions 201 to 203) on the side opposite to the clamps 34 and 60 to the outer peripheral surface of the connecting member 31. Thereby, even if the clamps 34 and 60 are locked to the flange portions 201 to 203, it is possible to suppress the clamps 34 and 60 from hitting the welding portions 201a to 203a and damaging the welding portions 201a to 203a. Further, since the welding portions 201a to 203a are not provided on the side of the clamps 34 and 60, the welding portions 201a to 203a do not get in the way, and the clamps 34 and 60 can be installed until they contact the flange portions 201 to 203 (that is, until the limit).

[0064] A predetermined interval L200 is provided between the first end of the connecting member 31 and the first flange portion 201. Thereby, it is possible to prevent the welded portion 201a of the first flange portion 201 from protruding from the first end of the connecting member 31. Further, compared with the case of welding at the end of the connecting member 31, the welded portion 201a can be formed to bulge from the outer peripheral surface of the connecting member 31, and strength can be obtained to resist the force with which the orthogonal clamp 60 tries to come off. Further, when welding at the end of the connecting member 31, there is a risk that the welded portion 201a hits another member due to repeated assembly, disassembly, and transportation of the wall joint 30, resulting in deterioration of the welded portion, but such a problem is also less likely to occur. A predetermined interval L201 is also provided between the second end of the connecting member 31 and the third flange portion 203, and the same effect as the above effect can be obtained.

[0065] The support member 33 supports the engaging member 32 so that the engaging member 32 is disposed at a position separated from the connecting member 31 by a predetermined first distance (= dimension L4), and the support member 33 is disposed at a position separated from the contact portion (contact surface) that contacts the outer wall 11 of the engaging member 32 by a predetermined second distance (= dimension L3) in the extending direction in which the connecting member 31 extends. More specifically, the engaging member 32 is attached to a position separated from the connecting member 31 by a first distance corresponding to the height dimension L4 of the support member 33 by attaching the first portion 321 thereof to the connecting member 31 via the support member 33.

[0066] Accordingly, when the engaging member 32 is disposed below the connecting member 31 and engaged with the outer wall 11, a gap 50 having a first distance in the vertical direction and a second distance in the horizontal direction (extending direction) is formed directly below the connecting member 31 (between the connecting member 31 and the engaging member 32). Then, the window frame 13 provided in the window 12 of the building 10 can be passed through this gap 50. Therefore, even if there are protrusions such as the window frame 13 in the window 12 of the building 10, it is possible to preferably avoid it and bring the engaging member 32 into surface contact with the outer wall 11 and firmly engage it. Thereby, the scaffold 20 can be firmly fixed to the building 10. Also, with a simple and robust structure, it is possible to form a gap 50 having a first distance in the vertical direction and a second distance in the horizontal direction directly below the connecting member 31.

[0067] Of the end portions of the second portion 322 of the engaging member 32, a plate member 324 is provided so as to extend from the tip end portion on the side farther from the connecting member 31. The plate member 324 is provided with an insertion hole 324a through which the anchor bolt 40 is inserted. Then, the tip end portion of the engaging member 32 is fixed to the outer wall 11 by the anchor bolt 40. Thereby, it is possible to prevent the engaging member 32 and the support member 33 from moving in the vertical direction and the engagement with the outer wall 11 from being released. Therefore, the movement of the wall joint 30 in the vertical direction can be restricted and it can be surely engaged with the outer wall 11. Also, since it is provided at the tip end portion of the engaging member 32, it is possible to stably engage the engaging member 32 with the outer wall 11 as compared with the case where it is provided at another portion, for example, the upper end portion. Further, since the plate member 324 is configured flush with the contact surface of the second portion 322, it can be stably brought into contact with the outer wall 11.

[0068] Two engaging members 32 are provided. The pair of engaging members 32 are attached to the connecting member 31 by the single clamp 34 via the support member 33 such that while the engaging members 32 are close to each other, the support members 33 (and the single clamp 34) are separated from each other. One of the engaging members 32a is configured to engage with the outer surface of the outer wall 11, and the other engaging member 32b is configured to engage with the inner surface of the outer wall 11. The pair of engaging members 32a and 32b engage with each other so as to sandwich the outer wall 11. Thereby, it is possible to prevent the scaffold 20 from tilting in a direction away from the building 10 and to prevent the scaffold from tilting toward the building 10 side.

[0069] The engaging member 32 is configured by bending a tubular square pipe having a square cross section into an L shape, or by welding a plurality of square pipes so as to form an L shape. Both ends of the engaging member 32 configured in an L shape are each closed. By configuring with a square pipe, the contact area of the contact portion (contact surface) can be increased, and stable engagement can be achieved. Further, since the engaging member 32 and the support member 33 are configured by square pipes, weight reduction can be achieved. On the other hand, since the end portion of the engaging member 32 is closed by the lid member 323, the strength can be improved.

[0070] The support member 33 is fixed to the connecting member 31 at a plurality of different locations by a plurality of single clamps 34. Therefore, reliable fixing can be achieved.

[0071] (Modification example) ·In the above embodiment, if the first to third protrusions can lock with the single clamp 34 or the orthogonal clamp 60 to restrict their movement, the shape thereof is not limited to the flange portions 201 to 203 and can be arbitrarily changed. For example, a plurality of protrusions provided at predetermined intervals in the circumferential direction may be used. For example, protrusions may be provided every 90°, 120°, or 180° in the circumferential direction.

[0072] · In the above-described embodiment, a third flange portion 203 for restricting the movement of the second end side (indoor side) of the connecting member 31 toward the second end side of the single clamp 34 may not be provided.

[0073] · In the above-described embodiment, among both end portions of the flange portions 201 to 203, the welding portions 201a to 203a are provided only on the side opposite to the clamps 34 and 60, but welding portions may be provided at both ends (both sides). Further, an adhesive portion which is an adhesive mark formed by adhesion instead of the welding portions 201a to 203a may be provided.

[0074] · In the above-described embodiment, a fourth protrusion for restricting the movement of the second end side of the connecting member 31 toward the first end side of the single clamp 34 may be provided. As the fourth protrusion, a fourth flange portion having the same shape as the flange portions 201 to 203 may be provided. The fourth protrusion is preferably arranged adjacent to the first end side in the single clamp 34 which is arranged at the most first end side among the plurality of single clamps 34. In this way, it is possible to prevent the single clamp 34 from shifting toward the first end side. Therefore, it is possible to prevent the position of the single clamp 34 from shifting greatly toward the first end side and the scaffold 20 from tilting toward the side (left side) of the building 10.

[0075] · In the above-described embodiment, in the vertical direction, the first distance between the connecting member 31 and the engaging member 32 may be arbitrarily changed. For example, it may be arbitrarily changed within the range of 20 mm to 80 mm. In this case, for example, the height dimension L4 of the support member 33 may be changed. Similarly, in the horizontal direction (the extending direction of the connecting member 31), the second distance from the contact portion with the outer wall 11 of the engaging member 32 to the support member 33 may be arbitrarily changed.

[0076] · In the above-described embodiment, the second end side of the wall joint 30 may be engaged with a veranda of the building 10, a parapet on the roof, or the like.

[0077] ·In the above embodiment, the lower end portion of the engaging member 32 is fixed by the anchor bolt 40, but the fixing position may not be the lower end portion, and may be, for example, the middle portion of the second portion 322. Further, the plate member 324 may be configured to entirely cover the engaging surface of the second portion 322 in the vertical direction. That is, the second portion 322 may be configured to engage with the outer wall 11 via the plate member 324. In that case, the plate member 324 may be fixed by being attached to the second portion 322 by welding or the like. In this case, it becomes possible to stably abut against the outer wall 11.

[0078] ·In the above embodiment, the engaging member 32 may not be fixed to the outer wall 11 by the anchor bolt 40.

[0079] ·In the above embodiment, instead of the anchor bolt 40, an anti-slip mechanism may be provided on the second portion 322 of the engaging member 32. For example, protruding spikes may be provided.

[0080] ·In the above embodiment, the cross-sectional shapes of the engaging member 32 and the support member 33 may be arbitrarily changed. For example, they may be constituted by round pipes.

[0081] ·In the above embodiment, the end portion of the engaging member 32 may not be closed.

[0082] ·In the above embodiment, the engaging member 32 and the support member 33 are constituted separately and fixed by welding or the like, but the engaging member 32 and the support member 33 may be integrally formed. That is, they may be integrally formed in an L shape, and a gap 50 may be formed as if the outer corner portion is cut out.

[0083] ·In the above embodiment, a pair of the engaging members 32 may not be provided. For example, only the indoor engaging member 32b may be sufficient.

[0084] ·In the above embodiment, the number of the single clamps 34 may be arbitrarily changed. For example, only one may be sufficient.

Explanation of Reference Numerals

[0085] 10… Building, 20… Scaffold, 30… Wall connection, 31… Connecting member, 32… Engaging member, 33… Support member, 34… Single clamp, 40… Anchor bolt, 60… Orthogonal clamp, 201… First flange portion, 202… Second flange portion, 203… Third flange portion.

Claims

1. A scaffolding connecting device (30) for connecting a construction object (10) at a construction site and a scaffolding (20) arranged around the construction object, having a first end fixed to the scaffolding and a second end fixed to the construction object, and a long connecting member (31) extending from the first end toward the second end; a scaffolding-side clamp (60) disposed on the first end side of the connecting member for fixing the first end side and the scaffolding; A scaffolding connecting device, wherein on the first end side of the connecting member, a first protrusion (201) adjacent to the first end side of the scaffolding-side clamp and restricting movement toward the first end side, and a second protrusion (202) adjacent to the second end side of the scaffolding-side clamp and restricting movement toward the second end side are provided.

2. An engaging member (32) that abuts and engages with the outer wall (11) of the construction object; a support member (33) for supporting the engaging member; a construction-object-side clamp (34) for attaching the support member to the second end side of the connecting member; The scaffolding connecting device according to claim 1, wherein on the second end side of the connecting member, a third protrusion (203) is provided on the second end side with respect to the construction-object-side clamp and restricts movement toward the second end side.

3. The scaffolding connecting device according to claim 2, wherein in the connecting member, no other protrusion for restricting the movement of the construction-object-side clamp is provided between the third protrusion and the second protrusion.

4. Each of the protrusions has a flange shape provided on the outer peripheral surface of the connecting member; The scaffolding connecting device according to any one of claims 1 to 3, wherein each of the protrusions is provided by welding or adhering a cylindrical ring having the same inner diameter as the outer diameter of the connecting member to the outer peripheral surface of the connecting member.

5. Comprising a welded portion where an end of the ring and the outer peripheral surface of the connecting member are welded; The scaffolding connecting device according to claim 4, wherein the welded portion is provided at least at the end on the side opposite to the adjacent clamp.

6. A method for manufacturing a scaffolding connecting device (30) for connecting a construction object (10) at a construction site and a scaffolding (20) arranged around the construction object, The scaffold connecting device has a first end fixed to the scaffold and a second end fixed to the object to be constructed, and includes a long connecting member (31) extending from the first end toward the second end. A clamp mounting step of mounting a scaffold-side clamp (60) for fixing the first end side and the scaffold on the first end side of the connecting member. On the first end side of the connecting member, a first protrusion (201) that is adjacent to the first end side with the scaffold-side clamp as the center and restricts movement toward the first end side, and a second protrusion (202) that is adjacent to the second end side with the scaffold-side clamp as the center and restricts movement toward the second end side are included, and includes a protrusion mounting step of mounting. In the protrusion mounting step, a hollow tube having the same inner diameter as the outer diameter of the connecting member is cut into rings to form a ring, and the protrusion is provided by welding or adhering the ring to the outer peripheral surface of the connecting member. A method for manufacturing a scaffold connecting device.

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