JP2015200083A - Clamp for temporary work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance working efficiency when using a clamp for temporary work of mutually connecting a U-shaped clamp and a pipe clamp.SOLUTION: A bolt having a screw shaft part 7a thicker than a bolt 10a of a fastening bolt-nut 10 of a pipe clamp 2, is used for a fastening bolt 7 of a U-shaped clamp 1, and a second hexagonal head part 7c of the same size as a hexagonal nut 10b of the fastening bolt-nut 10 of the pipe clamp 2 is integrally formed in a concentric two-stage overlapping state in a size stored inside the contour of this hexagonal head part 7b, in the hexagonal head part 7b of the fastening bolt 7 of this U-shaped clamp 1.

Description

  The present invention relates to a temporary work clamp in which a U-shaped clamp and a pipe clamp are connected to each other.

  This kind of temporary construction clamp is a steel pipe that constitutes a scaffold, etc. to a steel frame such as an H-shaped steel used for a beam at a construction site, or a steel pipe that connects the scaffold to the steel frame. It is used when combining. Specifically, as described also in Patent Document 1, the U-shaped clamp is a fastening that screw-penetrates one side plate portion of the U-shaped main body and the parallel side plate portions of the U-shaped main body facing each other. The pipe clamp includes a base member connected to the U-shaped main body of the U-shaped clamp, a movable pressing member pivotally supported at one end of the base member so as to be openable and closable, and the base member. The fastening bolt nut is pivotally supported on one end of the bolt so that the end of the bolt can be pivoted. The loose end of the movable presser member is fitted with the bolt of the fastening bolt nut so as to be freely detachable. A notch recess is formed, and the movable presser member is fastened to the base member by a hexagonal nut of the fastening bolt nut in which a bolt is fitted in the notch recess. Steel pipe can be clamped between Those configured to. The U-shaped clamp tightens the fastening bolt with the U-shaped main body fitted to the side of the steel frame, and the steel frame between the tip of the fastening bolt and one of the parallel side plate portions of the U-shaped main body. The steel pipe sandwiched between the base member of the pipe clamp and the movable holding member connected to the U-shaped clamp is fixed to the fastening bolt by fixing the U-shaped clamp to the steel frame. The end of the base member and the free end of the movable pressing member are fastened to each other with a nut, thereby fixing the pipe clamp.

JP 2004-225338 A

  Therefore, if bolts of the same thickness are used for the fastening bolt of the U-shaped clamp and the bolt of the clamping nut of the pipe clamp, the size of the hexagonal head of the clamping bolt of the U-shaped clamp and the pipe clamp Using the same socket set in an electric power tool such as an impact screwdriver with the same size as the hexagon nut of the fastening bolt and nut, you can rotate the fastening bolt of the U-shaped clamp and the nut of the fastening bolt nut of the pipe clamp. In the state of use, the clamping bolt of the clamp must be clamped with a pressing force between the pressing spring washer at the tip of the clamping bolt and the clamp body. Therefore, a very large compressive stress is applied, and the bolt of the pipe clamp fastening nut can be a base member that holds the entire steel pipe. Since the frictional force on the steel pipe surface of the holding member only needs to be increased by the tensile stress acting on the bolt, the bolt of the bolt nut for fastening the pipe clamp is different from the bolt for fastening the clamp. Even if a thin object is used, there is no problem in strength, and the cost can be reduced. However, when the bolts for tightening the nuts of the clamps of pipe clamps are used in this way, the size of the hexagonal heads of the bolts for fastening of the clamps is Power tools such as impact screwdrivers when rotating the clamp bolt of the U-shaped clamp and when rotating the nut of the bolt nut for fastening the pipe clamp. However, there is a problem in that the socket set in the socket must be replaced with one of a different size, which takes time and reduces work efficiency.

  The present invention proposes a temporary work clamp capable of solving the conventional problems as described above, and the temporary work clamp according to the present invention understands the relationship with the embodiments described later. For the sake of simplicity, the reference numerals used in the description of the embodiment are shown in parentheses, and are a clamp for temporary construction in which the U-shaped clamp (1) and the pipe clamp (2) are connected to each other. The U-shaped clamp (1) is threaded through one side plate (4) of the U-shaped main body (3) and the parallel side plates (4, 5) facing each other. The pipe clamp (2) includes a base member (8) connected to the U-shaped body (3) of the U-shaped clamp (1), and the base member (8). A movable presser member (9) that is pivotally supported at one end so as to be openable and closable, and a bolt (10a) that is pivotally supported at the other end of the base member (8). A fastening bolt nut (10), and a notch recess (not shown) in which the bolt (10a) of the fastening bolt nut (10) is detachably fitted to the free end portion of the movable holding member (9). 11) is formed, and the hexagon nut (10b) of the fastening bolt nut (10) in which the bolt (10a) is fitted in the notch recess (11), the movable presser member (9) is moved to the base member. In the clamp for temporary construction constructed so that the steel pipe can be clamped and fixed between the movable presser member (9) and the base member (8) by fastening to the direction of (8), the U-shaped clamp (1) For the fastening bolt (7), a bolt having a screw shaft portion (7a) thicker than the bolt (10a) of the fastening bolt nut (10) of the pipe clamp (2) is used. The fastening bolt nut (10) of the pipe clamp (2) has a size that fits inside the contour of the hexagonal head (7b). The second hexagonal head of the same size as the hexagonal nut (10b) (7c) has integral formed configuration to the state overlapping concentric bunk.

  According to the configuration of the present invention, a thick bolt having a large compressive strength is used for the fastening bolt of the U-shaped clamp, and it is only necessary to obtain a necessary tensile strength for the bolt of the bolt nut for fastening the pipe clamp. By using thin bolts, not only can the pipe clamp be made compact and lightweight, but the cost of the entire clamp can be reduced. In addition, when mounting and removing this clamp, when using only the socket for rotation operation that fits the nut of the tightening bolt nut of the narrower pipe clamp, when rotating the fastening bolt of the U-shaped clamp, The fastening bolt can be rotated without any problems using the small second hexagonal head that is integrally formed on the original large hexagonal head. There is no need to replace the socket for a different size. Therefore, work efficiency can be increased. Of course, when rotating the fastening bolt of the U-shaped clamp, the second hexagonal head is not affected by using the rotational socket that fits the large hexagon head of the original size of the fastening bolt. It is also possible to perform a powerful rotation operation.

FIG. 1 is a front view showing a pipe clamp in a longitudinal section. FIG. 2 is a left side view of the U-shaped clamp. FIG. 3 is a plan view of the U-shaped clamp.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Reference numeral 1 denotes a U-shaped clamp, and 2 denotes a pipe clamp. The U-shaped clamp 1 is composed of a U-shaped main body 3 and a fastening bolt 7 screwed through the one end side plate portion 4 of three continuous side plate portions 4 to 6 of the U-shaped main body 3. Are a base member 8 connected to the U-shaped main body 3 of the U-shaped clamp 1, a movable pressing member 9 pivotally supported by one end of the base member 8, and the other end of the base member 8. The bolt 10a of the fastening bolt nut 10 is detachably fitted to the free end portion of the movable presser member 9. A notch recess 11 is formed, and the movable presser member 9 is fastened toward the base member 8 by a hexagonal nut 10b of the fastening bolt nut 10 in which a bolt 10a is fitted in the notch recess 11. Configured to get.

  More specifically, the U-shaped main body 3 of the U-shaped clamp 1 is a steel plate provided with a concave groove portion 12 that is released only inside and continues in a U-shape, and an overhang plate portion 13 that projects from the peripheral edge of the concave groove portion 12. The one end side plate portion 4 is provided with a through screw hole 14 formed by machining the inner side of the burring hole protruding inward, and the fastening screw hole 14 is fastened to the through screw hole 14. The bolt 7 is threaded through. As the fastening bolt 7, for example, a screw in which a hexagonal head 7 b having an opposite side of 21 mm is integrally formed on the outer end of the screw shaft portion 7 a of M14 can be used.

  The clamp for temporary construction of this embodiment has a direction in which the pipe clamp 2 is positioned outside the other end side plate portion 5 of the C-shaped clamp 1 as shown by a solid line and a virtual line as shown by a solid line. The prismatic member 15 attached to the outer side of the base member 8 of the pipe clamp 2 is capable of switching the direction to the direction of the outer side plate portion 6 of the U-shaped clamp 1. A retaining pin 15a is provided in a portion of the prismatic member 15 located in the U-shaped clamp 1 so as to penetrate the L-shaped continuous opening 16 over the other end side plate portion 5 and the intermediate side plate portion 6 inward. Is attached. Further, at one end of the prismatic member 15, a pipe clamp support seat 15b is provided on the base member 8 of the pipe clamp 2 so as to protrude from the pipe clamp support seat 15b concentrically with the prismatic member 15. A shaft portion 15c that penetrates the through hole and a retaining plate 15d that is screwed and fastened to the shaft portion 15c inside the base member 8 are provided, and the pipe clamp 2 is rotatable around the shaft portion 15c. .

  The base member 8 and the movable pressing member 9 of the pipe clamp 2 are pressed products of steel plates provided with side wall portions 8a and 9a that protrude inward from both sides, respectively. In a state in which one end portion is fitted into one end portion of the side wall portion 8 a of the base member 8, both of them are pivotally connected by a support shaft 17 penetrating the side wall portions 8 a and 9 a so as to be openable and closable. Between the other end portions of 8a, an inner end bearing portion 10c of the bolt 10a of the fastening bolt nut 10 is connected by a support shaft 18 parallel to the support shaft 17 so as to be opened and closed and swingable. At the free end of the bolt 10a, a retaining head 10d having a diameter that fits inside the outline of the hexagon nut 10b is formed. As the bolt 10a of the fastening bolt nut 10, a screw W7 / 16-14, for example, which is thinner than the screw shaft portion 7a of the fastening bolt 7 of the U-shaped clamp 1 is used. As the hexagon nut 10b, A size smaller than the hexagonal head 7b of the fastening bolt 7 of the U-shaped clamp 1 and within a contour thereof, for example, a 17 mm opposite side can be used.

  In the clamp for temporary construction configured as described above, according to the present invention, the hexagonal nut 10b in the fastening bolt nut 10 of the pipe clamp 2 is provided outside the hexagonal head 7b of the fastening bolt 7 of the U-shaped clamp 1. The second hexagonal head 7c of the same size as is integrally formed in a concentric two-tiered state. A pressing spring washer 7d is attached to the inner end of the screw shaft portion 7a of the fastening bolt 7 of the U-shaped clamp 1 so as to be able to rotate.

  The above-mentioned temporary work clamp itself composed of the U-shaped clamp 1 and the pipe clamp 2 is used by a conventionally known method. Briefly, when the steel pipe for connecting the temporary scaffolding itself or the steel pipe for connecting the temporary scaffolding to the steel frame is connected to the steel frame, the U-shaped clamp 1 is fitted to the side of the steel frame, and the other end side plate part 5 is used for fastening The fastening bolt 7 is fastened while being sandwiched between the tip pressing spring washer 7d of the bolt 7 and the other end side plate portion 5 of the U-shaped clamp 1 and the pressing spring washer 7d at the tip of the fastening bolt 7 are connected. The U-shaped clamp 1 is attached to the steel frame while sandwiching the side of the steel frame between them. At this time, depending on the direction and position of the steel pipe to be attached, the pipe clamp 2 is positioned outside the other end side plate portion 5 of the U-shaped clamp 1 or positioned outside the intermediate side plate portion 6 of the U-shaped clamp 1. The prismatic member 15 that is interlocked with the change in the direction of the pipe clamp 2 is fixed to the U-shaped clamp 1 by the side of the steel frame sandwiched by the U-shaped clamp 1. When the U-shaped clamp 1 is attached to the side of the steel frame in this way, the movable presser member 9 is put on the steel pipe applied to the inner side of the base member 8 of the pipe clamp 2 and the fastening bolt nut 10 is attached to the support shaft 18. And the bolt 10a is fitted into the notch recess 11 at the free end of the movable presser member 9. In this state, the hexagon nut 10b is tightened, and the steel pipe between the base member 8 and the movable presser member 9 is clamped and fixed.

  When the temporary work clamp is used as described above, the fastening bolt 7 of the U-shaped clamp 1 is obstructed by the second hexagonal head 7c with a socket that fits the hexagonal head 7b of the original large size. It can be fitted to the hexagonal head 7b and rotated by an electric tool, but the electric tool at that time has a thin socket that fits the hexagonal nut 10b of the thin fastening bolt nut 10 on the pipe clamp 2 side. If it is in the mounted state, the thin socket can be fitted to the second hexagonal head 7c of the fastening bolt 7 of the U-shaped clamp 1 and rotated with an electric tool. In other words, both the hexagon nut 10b of the fastening bolt nut 10 of the pipe clamp 2 and the fastening bolt 7 of the U-shaped clamp 1 are rotated using a single type of socket set in the electric tool. I can do it.

  In addition, the structure of the clamp for temporary construction which can implement this invention is not limited to what was shown in the said Example. For example, the pipe clamp 2 in the above embodiment is fixed in a fixed direction with respect to the prismatic member 15 (the pipe clamp 2 cannot be rotated around the shaft portion 15c). The pipe clamp 2 is fixed in a fixed direction outside the other end side plate portion 5 in the clamp 1 or is attached so as to be able to rotate around an attachment shaft, and the intermediate side plate portion 6 in the U-shaped clamp 1. The pipe clamp 2 is fixed in a fixed direction outside or is temporarily mounted around the mounting shaft so that it can rotate about itself, the U-shaped clamp 1 and the pipe clamp 2 change the distance between them. The present invention can also be applied to a temporary work clamp that is connected via an intermediate connection member.

  The clamp for temporary work of the present invention is a temporary work that can efficiently perform a connecting work for connecting a steel pipe constituting a temporary scaffold to a steel frame on a building side or a steel pipe for connecting the temporary scaffold to a steel frame at a construction site. Can be used as a clamp for

DESCRIPTION OF SYMBOLS 1 U-shaped clamp 2 Pipe clamp 3 U-shaped main body 4-6 Side plate part of U-shaped main body 7 Clamping bolt 7a Screw shaft part 7b Hexagon head 7c Second hexagonal head 7d Spring washer for pressing 8 Pipe Clamp base member 9 Pipe clamp movable pressing member 10 Fastening bolt nut 10a Bolt 10b Hexagon nut 10c Bearing portion 10d Retaining head 11 Notch recess 15 Square columnar member 15c Pipe clamp rotating shaft 16 Opening 17 , 18 Spindle

Claims (1)

  This is a temporary work clamp in which a U-shaped clamp and a pipe clamp are connected to each other, and the U-shaped clamp is formed by screwing one side plate of the U-shaped main body and the parallel side plate facing each other. The pipe clamp comprises a base member connected to the U-shaped main body of the U-shaped clamp, a movable pressing member pivotally supported at one end of the base member so as to be openable and closable, The fastening bolt nut is pivotally supported at one end of the bolt on the other end of the base member, and the bolt of the fastening bolt nut is detachable at the free end of the movable presser member. A notch recess to be fitted is formed, and the movable presser member is fastened to the base member by a hexagonal nut of the fastening bolt nut in which a bolt is fitted to the notch recess. And ba In the temporary construction clamp configured so that the steel pipe can be clamped and fixed between members, the fastening bolt of the U-shaped clamp has a screw shaft portion thicker than the bolt of the fastening bolt nut of the pipe clamp. The hexagonal head of the fastening bolt of this U-shaped clamp has a size that fits inside the outline of the hexagonal head, and is the same size as the hexagonal nut of the fastening bolt nut of the pipe clamp. A clamp for temporary construction, in which the square heads are integrally formed in a concentric double-stacked state.

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