JP2024032136A - Clamp for attaching separate parts - Google Patents

Abstract

The present invention provides a clamp for attaching another member that can be used when incorporating another member, such as a brace material, into a steel pipe of a framework structure such as a temporary scaffold. [Solution] A wedge body 5 is provided with a distal side retaining protrusion 7 at its distal end portion 5a, and a distal wedge insertion hole 3 provided in a U-shaped main body 2 is provided with a distal side retaining protrusion 7 at its distal end portion 5a. The rear wedge insertion hole 4 of the U-shaped main body 2 is wide enough to be inserted into and taken out from the wedge body, and has a width that prevents the distal end retaining protrusion 7 from passing through. A cutout recess 8 is provided for moving the side wedge insertion hole 4 through the rear end wedge insertion hole 4 in a state lowered to the lower end thereof, and when the presser member 6 is pivotally supported, its pivot support 10 is provided. However, when the distal end portion 5a of the wedge body is moved in and out of the rear end side wedge insertion hole 4 using the notch recess 8, the distal end portion 5a of the wedge body enters the moving path. [Selection diagram] Figure 1

Description

The present invention relates to a clamp for attaching another member, which can be used when incorporating other members, such as brace materials, into a steel pipe of a framework structure such as a temporary scaffold.

When incorporating braces into a framework structure such as a temporary scaffolding, the ends of the diagonal braces are overlapped with the two vertically oriented steel pipes that make up the framework structure, allowing the two pipe clamps to rotate freely relative to each other. The vertical steel pipe and the end of the bracing material diagonally overlapping the vertical steel pipe are connected to each other using a double pipe clamp, or two vertical steel pipes are connected to each other using a double pipe clamp. A method has been adopted in which the horizontal member and the end of the brace material are stacked on top of each other and connected using bolts and nuts.

However, with the conventional method described above, it takes time and effort to screw in the fastening bolts included in the pipe clamp and the bolts and nuts that directly fasten the horizontal members and the ends of the brace material, making it difficult to proceed with the work efficiently. There was a problem. Of course, wedge-type clamps that are fastened by driving wedges instead of fastening bolts are also known, but in this wedge-type clamp, the wedges that are driven in strongly slide into contact with the circumferential surface of the steel pipe, and the wedges and When the circumferential surface of the steel pipe comes into a line contact state, and stress is concentrated at this line contact portion, not only the circumferential surface of the steel pipe is severely damaged, but there is also a risk that the wedge body may be deformed and damaged.

The present invention proposes a clamp for attaching a separate member that can solve the above-mentioned conventional problems, and the clamp for attaching a separate member according to the present invention has the following features: For ease of understanding, the reference numerals used in the description of the embodiment are shown in parentheses: a U-shaped body (2) with a separate member attachment part (1), and this U-shaped body ( The wedge body (5) is used by passing through the two wedge insertion holes (3, 4) provided in both arm parts (2a, 2b) of 2), and the U-shaped A holding member (6) is pivotally supported on the arm portion (2b) on one side of the main body (2), and by driving the wedge body (5), a steel pipe (2) into which the U-shaped main body (2) is fitted is formed. In the clamp for attaching another member that clamps P) between the curved bottom part (2c) of the U-shaped main body (2) via the holding member (6), the wedge body (5) has a tip on the driving direction side. The distal end portion (5a) of the wedge body (5) is provided with a distal side retaining protrusion (7) that protrudes laterally from the vertical side surface of the portion (5a), and the distal end portion (5a) of the wedge body (5) The distal wedge insertion hole (3) through which the wedge body (5) passes is formed wide enough to allow the distal end (5a) of the wedge body (5) to be inserted and removed together with the distal side retaining protrusion (7). The rear end side wedge insertion hole (4) through which the rear end portion (5b) passes is provided with a width through which the distal side retaining protrusion (7) of the wedge body (5) cannot pass through. ) when moving through the rear wedge insertion hole (4) with the tip (5a) of the wedge (5a) lowered to the lower end of the rear wedge insertion hole (4), the tip of the wedge (5) A notched recess (8) through which the side retaining protrusion (7) passes is provided on the side surface near the lower end of the rear wedge insertion hole (4), and the pivot support (10) of the presser member (6) is , is provided at a position below the wedge body (5) when the steel pipe is fastened, on one arm part (2b) equipped with the rear end side wedge insertion hole (4), and the shaft of this holding member (6) When the branch (10) inserts and removes the tip (5a) of the wedge (5) into and out of the rear wedge insertion hole (4) using the notched recess (8), the wedge (5) ) is configured to fit within the movement path of the tip (5a).

According to the configuration of the present invention, when assembling, before pivoting the presser member to the U-shaped main body, the tip of the wedge body is inserted toward the inside of the U-shaped main body from the rear end side wedge insertion hole. At this time, the distal end of the wedge is inserted through the rear wedge insertion hole by inserting and passing the distal retaining protrusion on the side surface of the distal end of the wedge into the notch recess provided in the rear wedge insertion hole. It can be inserted into the U-shaped body through the hole. After the tip of the wedge is inserted into the inside of the U-shaped main body from the rear-end side wedge insertion hole in this way, the presser member is pivotally supported by the U-shaped main body. That is, a presser member is inserted under the tip of the wedge that has entered the inside of the U-shaped body, and the end of the presser member that constitutes the shaft support is attached to the rear end side of the U-shaped body. It is pivotally supported on one side of the arm with a wedge insertion hole so that it can be opened and closed.

In the clamp for attaching another component of the present invention, which has been assembled as described above, the wedge body, with both ends of the wedge body inserted into the wedge insertion holes of both arms of the U-shaped main body, is in the normal wedge driving direction. If the wedge moves in the opposite direction, the tip of the wedge will come out of the wedge insertion hole on the front end side into the inside of the U-shaped body, but the tip of the wedge will further pass through the wedge insertion hole on the rear end side. There is no danger that the wedge will fall out of the U-shaped body by passing from the inside outward. That is, in order for the distal end of the wedge to pass through the rear wedge insertion hole, the distal end retaining protrusion of the wedge must pass through the cutout recess provided near the lower end of the rear wedge insertion hole. The wedge body must move through the U-shaped body, and the shaft support of the presser member is inserted into the movement path of the tip of the wedge body at this time, so as long as the presser member is pivotally supported by the U-shaped body, the wedge body It is impossible for the wedge body to accidentally fall off from the U-shaped body or to be artificially removed from the U-shaped body.

The above-mentioned effect can be expected due to the presence of the distal-side retaining protrusion provided at the distal end of the wedge body, but according to the configuration of the present invention described above, the rear-end side of the U-shaped body can be inserted into the wedge. Using the notched recess provided near the lower end of the side of the hole, insert the tip of the wedge body equipped with the protrusion for preventing the tip from falling out from the rear wedge insertion hole into the inside of the U-shaped body. After inserting, it is only necessary to pivot the presser member at a predetermined position on the U-shaped body, and the tip of the wedge inserted into the inside of the U-shaped body through the rear wedge insertion hole as in the conventional case. In addition, there is no need to perform processing operations for forming the retaining protrusion, such as pressing the protrusion to form the retaining protrusion or attaching a separate member constituting the protrusion to the tip of the wedge by welding or the like. This makes it easy to assemble the clamp for attaching another component. In other words, the wedge body is always integrated into the U-shaped body, so there is no risk of the wedge body accidentally coming off, and there is no need to prepare the wedge body and assemble it into the U-shaped body during use. can be obtained easily and inexpensively.

When carrying out the present invention, the wedge body (5) is bent downwardly from the left and right sides along the length of the top plate (11) and the top plate (11). The wedge body (5) is formed into a gate-shaped cross section with a side plate part (12), and the lower side of the side plate part (12) at the tip (5a) of this wedge body (5) has an overhang part ( 12a), and the distal-side retaining protrusion (7) is located below the protruding portion (12a) from the center of the height of the distal end portion (5a) including the protruding portion (12a). The height of the rear end (5b) is higher than the height of the rear end wedge insertion hole (4) on the lower side of the rear end (5b) of this wedge (5). A protrusion (17) can be provided to protrude downward. According to this configuration, even when the distal side retaining protrusion is formed by press working, a necessary and sufficient plate surface can be secured under the distal retaining protrusion, and the distal retaining protrusion can be Not only is it easier to form by press working, but the lower side of the wedge between the protruding part on the lower side of the tip and the protruding part on the lower side of the rear end is recessed inward, making it easier to form the side plate of the wedge. Compared to the case where the height of the entire section is increased, the increase in weight of the wedge body can be minimized.

Further, the U-shaped main body (2) includes a U-shaped strip plate portion (13) in which the strip plate provided with the wedge insertion holes (3, 4) is curved into a U-shape, and this U-shaped strip plate portion (13). The holding member (6) includes left and right U-shaped side plate portions (14) that are bent inwardly from both left and right sides of the body, and the holding member (6) is attached to the steel pipe (P) into which the U-shaped body (2) is fitted. A curved thick plate part (15) that curves along the circumferential surface, and a pair of left and right parts connected to one end of the curved thick plate part (15) and located inside the left and right U-shaped side plates (14). A supporting shaft (9) passing through the pair of left and right bearing plate parts (16) is installed between the left and right U-shaped side plate parts (14) to hold the presser member ( The lower side of the wedge (5) which constitutes the shaft support (10) of 6) and passes through the two wedge insertion holes (3, 4) is the pair of left and right sides of the shaft support (10) of the holding member (6). It can be configured to loosely fit between the bearing plate parts (16) of the bearing plate part (16). According to this configuration, the height of the presser member relative to the wedge body can be increased even slightly, compared to a shaft support in which a cylindrical portion through which the support shaft passes is provided on one end of the presser member, and the entire structure is lightweight and It can be configured compactly.

FIG. 1 is a front view of a clamp for attaching another member according to an embodiment of the present invention when the clamp is not in use. FIG. 2 is a right side view of FIG. 1. FIG. 3 is a partially cutaway cross-sectional plan view of the wedge body being stretched between both arm portions of the U-shaped main body. FIG. 4 is an exploded perspective view of the components excluding the wedge body. FIG. 5 is a longitudinal sectional front view showing the first step when fitting the U-shaped main body onto the steel pipe. FIG. 6 is a longitudinal sectional front view showing the second stage of the same. FIG. 7 is a longitudinal sectional front view showing a state in which the U-shaped main body is fixed to an externally fitted steel pipe with a wedge body. FIG. 8 is a cross-sectional plan view showing the first step in assembling the clamp for attaching another member. FIG. 9 is a longitudinal sectional front view showing the first stage of the same. FIG. 10 is a cross-sectional plan view when the wedge body is pulled out from the assembled clamp for attaching another member. FIG. 11 is a longitudinal sectional front view of the same as above. FIG. 12 is a left side view of the main parts same as above. FIG. 13 is an elevational view showing an example of use of the clamp for attaching another member according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the attached FIGS. 1 to 7. The clamp for attaching another member of the present invention includes a U-shaped main body 2 having a separate member attaching portion 1, A wedge body 5 is used by passing through two wedge insertion holes 3 and 4 provided in both arm parts 2a and 2b of this U-shaped body 2, and a wedge body 5 is used by penetrating the two wedge insertion holes 3 and 4 provided in both arm parts 2a and 2b of this U-shaped body 2, and A holding member 6 is pivotally supported on the arm portion 2b so as to be freely openable and closable, and by driving the wedge body 5, the steel pipe P that the U-shaped main body 2 is fitted onto is pushed through the holding member 6 to the curved bottom of the U-shaped main body 2. 2c.

The wedge body 5 has a gate-shaped cross section, and includes a top plate part 11 and a side plate part 12 that is bent downward from both left and right sides along the length of the top plate part 11. On the lower side of the side plate 12 at the tip 5a of the wedge body 5, an overhang 12a is formed that projects downward, and the height is higher than the center position of the tip 5a including the overhang 12a. A protrusion 7 for preventing the distal end from falling off is provided at a lower position of the overhanging portion 12a. Further, a protrusion 17 that extends downward flush with the rear end surface of the wedge body 5 is integrally formed on the side plate portion 12 at the rear end portion 5b of the wedge body 5. In the illustrated embodiment, the overhanging portions 12a and the protruding portions 17 are provided in pairs symmetrically on the lower sides of the left and right side plate portions 12 of the wedge body 5, but they may also be provided on only one side plate portion 12. . Further, the distal end retaining protrusion 7 may also be provided on each of the both side plate portions 12, but in this embodiment, it is provided only on the side plate portion 12 having the overhang portion 12a on one side. The distal end retaining protrusion 7 is formed by pressing outward from the inside of the side plate 12 so as to protrude integrally with the side plate 12 in a hemispherical shape.

The U-shaped main body 2 includes a U-shaped strip plate portion 13 in which a strip plate provided with the wedge insertion holes 3 and 4 is curved into a U-shape, and a U-shaped strip plate portion 13 that is bent inward from both left and right sides of the U-shaped strip plate portion 13. It is provided with both left and right U-shaped side plate portions 14. The holding member 6 extends upward from both left and right sides of a curved thick plate portion 15 that curves along the circumferential surface of the steel pipe P into which the U-shaped main body 2 is fitted, and a flat plate portion 15a at one end of this curved thick plate portion 15. It is comprised of a pair of left and right bearing plate parts 16 that are bent and connected to each other and adjacent to the inside of the left and right U-shaped side plate parts 14. A support shaft 9 passing through the pair of left and right bearing plate portions 16 is installed between the left and right U-shaped side plate portions 14 to constitute a shaft support 10 of the presser member 6. The support shaft 9 passes through shaft holes 23 provided concentrically in both the left and right U-shaped side plates 14, and is secured to the arm by a head 9a at one end and a post-molded retaining head 9b at the other end. It is fixed to the section 2b. Further, the support shaft through hole 18 provided in both the left and right bearing plate parts 16 is arranged so that the support shaft 9 passing through the hole can be located at such a low position that it touches the upper surface of the flat plate part 15a of the holding member 6. The long hole is continuous in an L-shape from the plate portion 16 to the flat plate portion 15a.

The separate member attachment part 1 is configured to correspond to the separate member to be actually attached, but in this embodiment, bolts are attached to each part so that the ends of the brace material can be connected with connecting bolts and nuts. It has a gate-shaped structure in which the upper ends of a pair of side plate parts 20 in which holes 19 are provided concentrically are connected by a connecting plate part 21, and the direction in which the pair of side plate parts 20 of this connecting plate part 21 are connected is The vertical section is concavely curved along the curved surface of the curved bottom 2c of the U-shaped main body 2, and the connecting plate parts 21 are attached to the outside of the curved bottom 2c of the U-shaped main body 2 in a state in which they are in surface contact with each other. . For this attachment, bolts and nuts passing through the attachment through hole 22 provided at the center of the curved bottom portion 2c may be used, but in this embodiment, by welding the two around their contact surfaces, It is combined and integrated.

The distal end wedge insertion hole 3 provided in the U-shaped main body 2 is formed wide enough to allow the distal end portion 5a of the wedge body 5 to be inserted and removed together with the distal side retaining protrusion 7, and the rear end portion of the wedge body 5 The rear end side wedge insertion hole 4 through which the wedge body 5b penetrates has a width that does not allow the distal end retaining protrusion 7 of the wedge body 5 to pass through, and extends below the lower side of the wedge body 5 when used for fastening steel pipes. The lower end portion 4a is configured to have a height of 1. Furthermore, when the tip 5a of the wedge body 5 is lowered to the lower end 4a of the rear wedge insertion hole 4, a tip side retaining protrusion 7 is provided on the side surface of the rear wedge insertion hole 4 near the lower end. A semicircular notch 8 is provided through which the material can pass. In addition, on both side plate parts 12 of the arm part 2b provided with the rear end side wedge insertion hole 4 of the U-shaped main body 2, there is a support member shaft support located directly beside the lower end 4a of the rear end side wedge insertion hole 4. A shaft hole 23 is provided concentrically.

To explain the method of assembling the clamp for attaching another member according to the present invention having the above-mentioned structure, as shown in FIGS. Insert it from the outside. At this time, the tip portion 5a of the wedge body 5 inserted into the rear end side wedge insertion hole 4 is inserted into a cutout recess in which the tip side retaining protrusion 7 is provided at a position near the lower end of the side of the rear end side wedge insertion hole 4. 8, and operate so that the distal-side retaining protrusion 7 passes through the notch recess 8. After this, the presser member 6 is pivotally supported by the U-shaped main body 2. That is, the presser member 6 is inserted under the tip 5a of the wedge body 5 that has entered the inside of the U-shaped main body 2 from the rear end side wedge insertion hole 4, and the pair of left and right bearing plate portions of the presser member 6 are inserted. 16 is positioned inside the shaft hole 23 provided in the side plate portion 12 of the arm portion 2b of the U-shaped main body 2, and in this state, the support shaft 9 is inserted through the shaft hole 23 and the support shaft through hole 18, A retaining head 9b is formed at the tip of the support shaft 9 protruding from the side plate part 12 of the arm part 2b, and the support shaft 9 is fixed by sandwiching the arm part 2b with the head 9a. As a result, the holding member 6 is attached to the U-shaped main body 2 so as to be able to open and close up and down around the support shaft 9.

As shown in FIG. 13, the clamp for attaching another member of the present invention configured as described above includes vertical support columns 24a, 24b made of a pair of left and right steel pipes P, and these support columns 24a, 24b connected to each other. When incorporating a brace material 27 that diagonally connects and integrates both supports 24a and 24b between the upper and lower horizontal connecting members 25 into a temporary scaffold framework structure 26 that is composed of horizontal connecting members 25 that are connected and integrated. Can be used. To explain an example of the procedure for assembling the brace material 27, for example, two separate member attachment clamps C1 and C2 are attached to each end of the brace material 27 in advance, and the ends of the brace material 27 are bolted to the respective separate member attachment parts 1. They are attached by connecting them with nuts, and clamps C1 and C2 for attaching separate members are connected to the upper end attachment position of the brace material of one of the struts 24a and the lower end attachment position of the brace material of the other strut 24b, and both the struts 24a, The brace member 27 can be diagonally installed between the parts 24b.

The method of connecting the separate member attachment clamps C1 and C2 to the supports 24a and 24b (steel pipes P) will be explained based on FIGS. 5 to 7. As shown in FIG. The arm portion 2b is pulled out to the rear end wedge insertion hole 4 side to the limit position (the state in which the distal end retaining protrusion 7 of the wedge body 5 abuts the side of the rear end wedge insertion hole 4), and the holding member is pulled out. 6 is moved upward around the support shaft 9 to open the space between both arm portions 2a and 2b of the U-shaped main body 2. In this state, the U-shaped bodies 2 of the separate member attachment clamps C1 and C2 are externally fitted onto the supports 24a and 24b (steel pipes P). Thereafter, as shown in FIG. 6, the presser member 6 is moved downwardly around the support shaft 9, and the columns 24a, 24b are moved between the curved thick plate portion 15 and the curved bottom portion 2c of the U-shaped main body 2. (Steel pipe P) is sandwiched. Finally, with the distal end 5a of the wedge 5 inserted from the inside into the distal wedge insertion hole 3 of the other arm 2a of the U-shaped main body 2, the rear end of the wedge 5 is struck. Enter 5. As a result, two locations in the length direction of the upper side surface of the wedge body 5 (the surface of the top plate portion 11) are located at the upper side of the tip side wedge insertion hole 3 of the U-shaped main body 2 and the upper side of the rear end side wedge insertion hole 4. At the same time, the lower side of the wedge body 5 (the lower side of the left and right side plate portions 12) is pressed downward against one location C on the curved surface of the curved thick plate portion 15 of the presser member 6, As a result, the holding member 6 clamps and fixes the supports 24a, 24b (steel pipe P) between the curved bottom 2c of the U-shaped main body 2, and the U-shaped main body 2 is fixed to the supports 24a, 24b (steel pipe P). Clamps C1 and C2 for attaching separate members are fixed through them.

As shown in FIG. 7, when the U-shaped main body 2 is fixed to the steel pipe P of a predetermined diameter using the wedge body 5, the position of the lower side of the wedge body 5 is almost constant. At this time, the wedge body 5 is separated upward from the support shaft 9 of the shaft support 10 of the presser member 6. Further, the pair of left and right bearing plate portions 16 of the shaft support 10 are inserted between the left and right side plate portions 12 of the wedge body 5 and the U-shaped side plate portions 14 of the U-shaped main body 2. Judging from this state, the position of the lower side of the rear end side wedge insertion hole 4 should be slightly lower than the lower side of the wedge body 5 in this state of use, but in the present invention, The position of the lower side of the rear end side wedge insertion hole 4 is lowered, and the rear end side wedge is inserted so as to have a lower end portion 4a that protrudes relatively largely below the lower side of the wedge when used for fastening steel pipes. By configuring the hole 4 vertically and lowering the tip 5a of the wedge body 5 to the lower end 4a of the rear end side wedge insertion hole 4, a tip end hole protruding from the side surface of the tip 5a of the wedge body 5 is formed. The locking protrusion 7 is configured to be able to move through a cutout recess 8 provided on the side surface of the rear wedge insertion hole 4 near the lower end.

Therefore, before the presser member 6 is pivotally supported by the U-shaped main body 2, that is, in a state where the pivot support 10 of the presser member 6 is not present, the tip portion 5a of the wedge body 5 is inserted into the rear end side wedge insertion hole 4. When inserting, by lowering the tip 5a of the wedge 5 to a height such that it touches the lower end of the rear wedge insertion hole 4, the side surface of the tip 5a of the wedge 5 is lowered. The distal end retaining protrusion 7 is configured to be able to pass through and move into a notched recess 8 provided on the side surface of the rear wedge insertion hole 4 near the lower end. As a result, before attaching the presser member 6 to the U-shaped main body 2, the tip portion 5a of the wedge body 5 is inserted into the inside of the U-shaped main body 2 through the rear end side wedge insertion hole 4 using the notched recess 8. Once closed, the wedge body 5 can be moved upward within the rear end side wedge insertion hole 4, so with the wedge body 5 raised upward, the presser member 6 is pivotally supported on the U-shaped main body 2 by the support shaft 9. be able to.

That is, according to the configuration of the present invention, after inserting the tip end 5a of the wedge body 5 into the inside of the U-shaped main body 2 from the rear end side wedge insertion hole 4, the presser member 6 is pivoted to a predetermined position of the U-shaped main body 2. By supporting it, a clamp for attaching another member in which the wedge body 5 is integrated with the U-shaped body 2 without the risk of the wedge body 5 accidentally falling off from the U-shaped body 2 can be obtained. After inserting the tip of the wedge 5, which is not provided with the retaining protrusion 7, into the inside of the U-shaped body 2 through the rear-end side wedge insertion hole 4, the wedge body 5 is located between both arms 2a and 2b of the U-shaped body 2. For example, a separate member may be fixed to the tip 5a of the wedge 5 by welding or the like, and a retaining protrusion protruding from the side surface of the tip 5a can be provided, but compared to such a normally considered configuration. According to the configuration of the present invention, the work of assembling the clamp for attaching another member with the U-shaped main body, the holding member, and the wedge body can be performed extremely easily.

The clamp for attaching another member of the present invention can be utilized when other members, such as brace materials, are incorporated into a steel pipe of a framework structure such as a temporary scaffold.

1 Separate component attachment portion 2 U-shaped main body 2a, 2b Arm portion 2c Curved bottom portion 3 Wedge insertion hole on the distal end side 4 Wedge insertion hole on the rear end side 4a Lower end portion 5 Wedge body 5a Tip portion 5b Rear end portion 6 Holding member 7 Removal on the distal end side Stopping protrusion 8 Notch recess 9 Support shaft 9a Head 9b Post-formed retaining head 10 Axial support of presser member 11 Top plate 12 Side plate 12a Overhang 13 U-shaped strip plate 14 U-shaped side plate 15 Curved thickness Plate portion 15a Flat plate portion 16 Bearing plate portion 17 Projection portion 18 Support shaft through hole 19 Bolt hole 20 Pair of side plate portions 21 Concave connecting plate portion 22 Mounting through hole 23 Shaft hole 24a, 24b Vertical support column 25 Horizontal connection member 26 Frame structure of temporary scaffolding 27 Brace material C1, C2 Clamp for attaching another member P Steel pipe

Claims (3)

A U-shaped main body equipped with a separate member attachment part, a wedge body that is used by passing through two wedge insertion holes provided in both arms of this U-shaped main body, and A presser member is provided on one side of the arm and pivotally supported so as to be openable and closable, and by driving the wedge, the steel pipe into which the U-shaped body is fitted is held between the U-shaped body and the curved bottom of the U-shaped body via the presser member. In the clamp for attaching another member, the wedge body is provided with a distal side retaining protrusion that protrudes laterally from a vertical side surface of the distal end portion on the driving direction side, and the distal end of the wedge body is provided with a distal side retaining protrusion that protrudes laterally from a vertical side surface of the distal end portion on the driving direction side. The distal wedge insertion hole through which the wedge passes through is formed wide enough to allow the distal end of the wedge to be inserted and removed together with the distal retaining protrusion, and the rear wedge insertion hole through which the rear end of the wedge penetrates , the wedge body has a width through which the protrusion for preventing the distal end side of the wedge body from coming off cannot pass through, and the distal end portion of the wedge body is moved through the rear end side wedge insertion hole with the distal end portion being lowered to the lower end of the rear end side wedge insertion hole. A notched recess through which the protrusion for preventing the distal end of the wedge body passes is provided on the side surface near the lower end of the rear wedge insertion hole, and the shaft support of the presser member is formed so that the protrusion on the distal end side of the wedge body passes through. One arm portion provided with a hole is provided at a position below the wedge body when the steel pipe is fastened, and the shaft support of this presser member uses the notch recess to move the tip of the wedge body to the rear side. A clamp for attaching another member that is inserted into the movement path of the tip of the wedge when it is inserted into and removed from the end wedge insertion hole. The wedge body has a gate-shaped cross section, and includes a top plate portion and side plate portions that are bent downwardly from both left and right sides along the length of the top plate portion. An overhang that projects downward is formed on the lower side of the side plate at the distal end of the body, and the distal end retaining protrusion is located at a height lower than the center position of the distal end including the overhang. A protrusion is formed at a lower position where the overhang is located, and a protrusion is provided on the lower side of the rear end of the wedge for making the height of the rear end higher than the height of the rear wedge insertion hole. 2. The clamp for attaching another member according to claim 1, wherein the portion protrudes downward. The U-shaped main body includes a U-shaped strip plate portion in which the strip plate provided with the wedge insertion hole is curved into a U-shape, and left and right U-shaped portions that are bent inward from both left and right sides of the U-shaped strip plate portion. The holding member includes a curved thick plate part that curves along the circumferential surface of the steel pipe into which the U-shaped main body is externally fitted, and a curved thick plate part that is connected to one end of the curved thick plate part, and is connected to the left and right sides. It consists of a pair of left and right bearing plate parts located inside both U-shaped side plate parts, and a support shaft passing through the pair of left and right bearing plate parts is installed between the left and right U-shaped side plate parts and serves as an axis of the presser member. 3. A support for attaching another member according to claim 1 or 2, wherein the support member is configured such that the lower side of the wedge body is configured to fit loosely between a pair of left and right bearing plate portions in the pivot support of the presser member. clamp.

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