JP2005336760A - Round pipe and suspended scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable round pipe capable of effectively preventing falling; and a suspended scaffold capable of easily assembling with excellent stability and capable of effectively preventing slipping-out of the round pipe from a pipe clamp. <P>SOLUTION: A square pipe part 3 of a cross-sectional square shape having a corner part 4 projecting outward from an outer peripheral surface of a round pipe part 2, is continuously arranged in the round pipe part 2 in at least one end part of the cross-sectional circular round pipe part 2. The suspended scaffold is constituted by using the round pipe 1 of such a constitution as a rolling pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a round pipe and a suspension scaffold used in a construction site or the like.

  In a construction site, a long metal round pipe is widely used as a constituent member of a suspended scaffold or a constituent member of a formwork.

  For example, in a suspended scaffold, a round pipe is used as a frame member or a crosspiece for supporting the scaffold plate, or as shown in FIG. 4 of Patent Document 1, a main rope stretched under the bridge or the like is used. A round pipe is used as a support bar for supporting a safety net for preventing a fall, or a round pipe is used as a support bar for supporting a handrail bar or a handrail. In addition, pipe clamps exclusively for round pipes are widely used for connecting round pipes or connecting round pipes and ropes.

  Moreover, as a suspension scaffold, it has a pair of side frames arranged in parallel with a gap, and a round pipe provided between the two side frames in an erected shape, and ends of the round pipes on the opposing surfaces of the two side frames. A substantially U-shaped support bracket is fixed to support the pin, and a pin member is erected and fixed at a substantially central portion in the length direction of the lower wall portion of the support bracket, and the pin member is inserted through both ends of the round pipe. What formed the hole is put into practical use (for example, refer patent document 2).

JP-A-6-185019 JP-A-8-128191

  The round pipe is widely used because it is inexpensive and easy to handle, but because it is easy to roll, when it is used at a high place such as a suspended scaffold, it rolls and falls from the scaffold etc. Is concerned. In order to prevent such a pipe from dropping, it is conceivable to use a square pipe instead of a round pipe. However, a square pipe is more expensive than a round pipe, and a pipe clamp for a round pipe currently in use is used. The existing equipment cannot be used as it is, for example, it is necessary to switch to a pipe clamp for a square pipe, which increases the economic burden on the contractor, and the switch to a square pipe has not been made sufficiently. It's real.

  In addition, in a suspended scaffolding in which round pipes are connected by pipe clamps, in addition to the problems caused by dropping of round pipes as described above when assembling the scaffolds, if the nut member of the pipe clamp that connects the round pipes loosens, May come off from the pipe clamp.

  Furthermore, in the suspension scaffold described in Patent Document 2, in addition to the problem due to the drop of the round pipe as described above when assembling the scaffold, the pin member is hidden by the round pipe when the round pipe is attached to the support bracket. Therefore, the alignment work between the through hole of the round pipe and the pin member of the support bracket is complicated, and if the hole diameter of the through hole is set large for efficient alignment, looseness is likely to occur. , Etc.

  An object of the present invention is a round pipe that can be manufactured inexpensively and that can effectively prevent a fall, and a suspension that can be easily assembled with good stability and can effectively prevent the round pipe from falling out of a pipe clamp. Is to provide a scaffold.

  In the round pipe according to the present invention, a square pipe portion having a square cross section having a corner portion protruding outward from the outer peripheral surface of the round pipe portion is connected to the round pipe portion at least at one end portion of the round pipe portion having a circular cross section. Is provided.

  Here, a square pipe portion is formed by aligning circumferential positions at both ends of the round pipe portion, the length of the square pipe portion is set within a range of 10 to 40 mm, and the square pipe portion is Forming a substantially square cross section is a preferred embodiment.

  The first suspension scaffold according to the present invention has a main body portion formed by connecting a plurality of scaffold pipes with pipe clamps, and a scaffold plate installed on the main body portion, and the scaffold pipe is the above-described first aspect. The round pipe of any one of -4 is used.

  A second suspension scaffold according to the present invention includes a pair of side frames arranged substantially parallel to each other at intervals, a scaffold pipe provided between the two side frames, and a scaffold plate placed on the scaffold pipe. A substantially U-shaped support fitting that opens upward is secured to at least the opposing surfaces of the two side frames with an interval in the length direction of the side frame, and the lower wall of the support fitting A pin member extending upwards is fixed at a substantially central part of the part, and the scaffolding pipe has corners protruding outward from the outer peripheral surface of the round pipe part at both ends of the round pipe part having a circular section. A square pipe portion having a substantially square cross section is provided to be connected to the round pipe portion with the circumferential position aligned, and a through hole through which the pin member is inserted is formed at both ends of the round pipe portion. Side frame pin in the through hole With inserting the member, the angled pipe scaffold pipes are fitted between the vertical wall of the support bracket, it is provided with a scaffolding pipe laid shape between the two side frames.

  According to the round pipe according to the present invention, the round pipe portion is provided with a square pipe portion having a square cross section having a corner portion protruding outward from the outer peripheral surface of the round pipe portion at at least one end portion of the round pipe portion having a circular cross section. Because the round pipe is prevented from rolling by the square pipe part, it is possible to effectively prevent the round pipe from falling from a high place such as a suspended scaffolding. Can be improved. Moreover, since a round pipe can be stably installed in a flat surface using a square pipe part, the work efficiency of various construction using a round pipe can be improved. In addition, since the square pipe is formed only at the end of the round pipe, the pipe clamps for the round pipe are used as they are, and pipes and pipes and wires are connected to each other. Therefore, it is possible to perform various kinds of construction work, and there is no economic burden on the construction contractor. Furthermore, even when the pipe clamp is somewhat loosened, the square pipe portion is caught by the pipe clamp, so that the round pipe can be prevented from falling out of the pipe clamp, so that the safety of the suspension scaffold can be further improved.

  Here, if the square pipe portions are formed by aligning the circumferential direction positions at both ends of the round pipe portion, the stability when the round pipe is installed on a flat surface can be further improved. The work efficiency of various construction work using a pipe can be further improved.

  In addition, by setting the length of the square pipe portion within a range of 10 to 40 mm, it is possible to prevent the round pipe from rolling while preventing the square pipe portion from hindering the mounting of the pipe clamp or the like. Can do.

  Furthermore, when the square pipe portion is formed in a substantially square cross section, a plurality of round pipes can be bundled in a compact manner, and the stability of the round pipes in the bundled state can be improved, and the storage and transportability can be improved. .

  According to the first suspension scaffold according to the present invention, the square pipe portions having a substantially square cross section having corner portions protruding outward from the outer peripheral surface of the round pipe portion are provided at both ends of the round pipe portion having a circular cross section. Therefore, when the suspension scaffold is assembled, the square pipe portion can effectively prevent the round pipe constituting the suspension scaffold from being rolled and dropped, so that the same effect as the round pipe can be obtained. Moreover, even when the pipe clamp is somewhat loosened, the square pipe portion is caught by the pipe clamp, so that the scaffold pipe can be effectively prevented from falling off from the pipe clamp, so that the safety of the suspended scaffold can be further improved.

  According to the second suspension scaffold according to the present invention, the square pipe portions having a substantially square cross section having corner portions protruding outward from the outer peripheral surface of the round pipe portion are provided at both ends of the round pipe portion having a circular cross section. Therefore, when the suspension scaffold is assembled, the square pipe portion can effectively prevent the problem that the scaffold pipe constituting the suspension scaffold rolls and falls. Moreover, when assembling the scaffolding pipe to the side frame, the square pipe part is fitted between the vertical wall parts of the support bracket, and the pin member of the side frame is inserted into the through hole of the round pipe part, so Scaffolding pipes will be installed in a mounting shape, but the pin member can be mounted in the through hole with the square pipe section having a substantially square cross section fitted to the substantially U-shaped support fitting and temporarily aligned Alignment of the through hole with respect to the pin member becomes extremely easy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an embodiment of the round pipe 1 will be described. Fig.1 (a) is a perspective view of the round pipe 1 of a present Example, FIG.1 (b) is an enlarged perspective view which showed the one edge part. As can be seen from FIGS. 1 (a) and 1 (b), the round pipe 1 of the present embodiment is obtained by processing both ends of a single pipe having a general configuration of 48.6 mm in diameter into a square shape, and has a round cross section. A square pipe section 3 having a square section having a corner section 4 protruding outward from the outer peripheral surface of the round pipe section 2 is provided at both ends of the section 2 so as to continue to the round pipe section 2. However, the square pipe portion 3 may be formed only at one end of the round pipe 1 as long as the round pipe 1 is prevented from falling. It is also possible to form the round pipe 1 by processing the end of a single tube having a diameter other than 48.6 mm into a square shape.

  The square pipe portion 3 is formed in a square cross section, and has four corner portions 4 that protrude outward from the outer peripheral surface of the round pipe portion 2. In the present embodiment, the square pipe portion 3 is formed in a substantially square cross section, but if it has at least one corner portion that protrudes outward from the outer peripheral surface of the round pipe portion 2, it can have any cross sectional shape. You may form, for example, you may form in polygonal shapes, such as a rectangle, a triangle, a pentagon, a hexagon, or an octagon. Further, the protruding amount of the corner portion 4 to the outside of the outer peripheral surface of the round pipe portion 2 can be arbitrarily set, but if it is less than 2 mm, a sufficient rolling prevention function cannot be obtained, and if it exceeds 5 mm, the processing machine becomes large. Therefore, it is preferable to set to 2 mm or more and 5 mm or less. In addition, when the length of the square pipe portion 3 is less than 10 mm, the rolling prevention function cannot be sufficiently obtained, and when it exceeds 40 mm, the holding of the round pipe 1 by the pipe clamp may be hindered. It is preferable to set to 10 mm or more and 40 mm or less. Furthermore, in this embodiment, since the square pipe portion 3 is formed in a square section, the angle of the corner portion 4 is set to about 90 °, but it can also be formed in an acute angle shape of less than 90 °.

  Since the round pipe 1 of the above-described embodiment has a substantially square shape, the round pipe 1 has a property that it is difficult to roll while having a round basic shape. Therefore, for example, when assembling the suspension scaffold 10 using this round pipe 1, it is possible to prevent the round pipe 1 from falling from the scaffold and to improve the safety of the work site. Moreover, since it is excellent in installation stability, not only the suspension scaffold 10 but the work efficiency of various construction work using the round pipe 1 can be improved. Moreover, since the square pipe portion 3 is formed only at the end portion of the round pipe 1, various construction work can be performed using the existing equipment as it is, such as a pipe clamp for the round pipe 1 currently used. Since it becomes possible, it does not become an economic burden on the contractor.

  Next, the suspension scaffold 10 using the said round pipe 1 is demonstrated.

  As shown in FIGS. 2 to 5, the suspension scaffold 10 includes a pair of side frames 11 arranged substantially in parallel with a space therebetween, and a scaffold pipe 12 provided in a erected shape at regular intervals between the side frames 11. And a scaffolding plate 13 placed on the upper side of the plurality of scaffolding pipes 12.

  The scaffold pipe 12 is composed of the round pipe 1 described above in which the square pipe sections 3 having a square cross section are formed at both ends of the round pipe section 2 at the same circumferential position. Through holes 5 are respectively formed in the vicinity of both ends of the round pipe portion 2 so as to correspond to the substantially central portion in the length direction of one of the parallel sides of the square pipe portion 3, and both the through holes 5 are arranged substantially in parallel. ing.

  The side frame 11 is formed by connecting a plurality of metal unit frames 14 having a rectangular cross section in the length direction, and the adjacent unit frames 14 are connected by a connecting metal fitting 16 disposed inside the end portion.

  A substantially U-shaped support fitting 15 that opens upward is fixed to the opposing surfaces of the side frames 11 with a gap in the length direction of the side frames 11. The support fitting 15 is formed in a substantially U shape by a pair of substantially parallel vertical wall portions 15a and a lower wall portion 15b connecting the lower ends thereof, and the interval between the vertical wall portions 15a is substantially equal to the diameter of the round pipe portion 2. A pin member 17 that is set to have the same or slightly larger dimensions and extends upward is fixed to a substantially central portion of the lower wall portion 15b. The round pipe 1 is arranged such that the ends of the square pipe portion 3 and the round pipe portion 2 are disposed between the vertical wall portions 15a, and the through hole 5 is inserted into the pin member 17 so that the support metal 15 is viewed from above. It is detachably attached. The pin member 17 is set to be shorter than the diameter of the round pipe portion 2, and the height of the vertical wall portion 15a is set to be slightly higher than that of the pin member 17, and the square pipe portion 3 is fitted between the vertical wall portions 15a. In a state where the round pipe 1 is temporarily aligned in the circumferential direction, the pin member 17 is inserted into the lower through hole 5 so that the pin member 17 can be easily aligned with the through hole 5. It is configured. However, it is also possible to configure the pin member 17 to be longer than the diameter of the round pipe portion 2 and insert the pin member 17 through the upper and lower through holes 5.

  Female screw members 18 are provided on the upper surface of the side frame 11 at regular intervals in the length direction, hook members 19 are screwed onto the female screw members 18, and the suspension scaffold 10 is a chain 20 that is hung on the hook members 19. Is supported in a suspended state.

  In this embodiment, the suspended scaffolding 10 is configured by the combination of the side frame 11, the scaffolding pipe 12, and the scaffolding plate 13. However, as shown in FIG. 6, a pair of parent pipes arranged substantially in parallel at intervals. A frame-shaped main body portion 24 is formed by 21, a colobasi pipe 22 arranged at regular intervals in the length direction of the main pipe 21, and a pipe clamp 23 connecting the main pipe 21 and the colobasi pipe 22. The round pipe 1 of the present invention can be similarly applied to a well-known suspended scaffold 26 configured by installing a scaffold plate 25 on the main body 24. In the suspended scaffold 26, the above-described round pipe 1 is used as the corroded pipe 22, so that the collapsible pipe 22 can be prevented from falling. Further, as shown in FIG. 7, the corner 4 of the corner pipe portion 3 of the round pipe 1 constituting the collabashi pipe 22 in the state where the corona bush pipe 22 is sandwiched between the base portion 23 a and the holding portion 23 b of the pipe clamp 23, Since it is arranged outside the inner peripheral edge of the holding portion 23b, even when the nut member 26 of the pipe clamp 23 is somewhat loosened, it is possible to prevent the round pipe 1 from falling out of the pipe clamp 23, thereby further improving the safety at the work site. It can be improved. However, in this case, the through hole 5 may be omitted.

(A) of the round pipe of a present Example is a perspective view, (b) is the expanded perspective view which showed the one edge part. Perspective view of hanging scaffold Exploded perspective view of the main part of the suspension scaffold Sectional view taken along line IV-IV in FIG. V-V line cross-sectional view of FIG. Perspective view of other structures VII-VII sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Round pipe 2 Round pipe part 3 Square pipe part 4 Corner part 5 Through-hole 10 Suspended scaffold 11 Side frame 12 Scaffold pipe 13 Scaffold plate 14 Unit frame 15 Support metal fitting 15a Vertical wall part 15b Lower wall part 16 Connection metal fitting 17 Pin member 18 Female thread member 19 Hook member 20 Chain 21 Parent pipe 22 Collaborative pipe 23 Pipe clamp 23a Base portion 23b Holding portion 24 Body portion 25 Scaffold plate 26 Suspended scaffold 26 Nut member

Claims (6)

  At least one end of the round pipe part having a circular cross section is provided with a square pipe part having a square cross section having a corner part protruding outward from the outer peripheral surface of the round pipe part so as to be connected to the round pipe part. Round pipe.   The round pipe of Claim 1 which formed the square pipe part in the circumferential direction position in the both ends of the said round pipe part.   The round pipe of Claim 1 or 2 which set the length of the said square pipe part in the range of 10-40 mm.   The round pipe according to claim 1, wherein the square pipe portion has a substantially square cross section.   The round pipe according to any one of claims 1 to 4, which has a main body part formed by connecting a plurality of scaffolding pipes with a pipe clamp, and a scaffolding plate installed on the main body part. Suspended scaffold characterized by using. Having a pair of side frames arranged substantially in parallel with an interval, a scaffolding pipe provided in a erected shape between the two side frames, and a scaffolding plate placed on the scaffolding pipe;
A substantially U-shaped support fitting that opens upward is fixed to at least the opposing surfaces of both side frames at a distance in the length direction of the side frame, and substantially at the center of the lower wall portion of the support fitting. A pin member extending upward is fixed upright,
As the scaffold pipe, round pipes having substantially square cross-sections having corners projecting outward from the outer peripheral surface of the round pipe part at both ends of the round pipe part having a round cross-section are aligned in the circumferential direction. Using the one that is connected to the part and formed a through hole through which the pin member is inserted at both ends of the round pipe part,
The pin member of the side frame is inserted into the through hole of the scaffold pipe, and the square pipe portion of the scaffold pipe is fitted between the vertical wall portions of the support bracket, and the scaffold pipe is provided in a erected shape between the side frames. ,
Suspended scaffold characterized by that.

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