JP6152411B1 - Single pipe connection mechanism in scaffold and scaffold comprising the same - Google Patents

Abstract

A single pipe connection mechanism in a suspension scaffold and a suspension scaffold including the same are capable of adjusting the connection direction of the single pipe. A single pipe connection mechanism for connecting a single pipe and a single pipe to each other in a suspended scaffold includes: at least one single clamp capable of gripping the single pipe; The first connecting single pipe extending adjacent to the gripped single pipe and the first connecting single pipe are coupled to the same side as the side to which the single clamp is fixed, and the first connecting single pipe A second connecting single pipe having a tip portion capable of holding a single pipe different from the single pipe gripped by the pipe, a connecting bolt for rotatably connecting the second connecting single pipe to the first connecting single pipe, And the connecting bolt penetrates the first connecting single pipe and the second connecting single pipe and rotatably connects the second connecting single pipe to the first connecting single pipe. And the second connecting single pipe in a position surrounding the connecting bolt in the radial direction of the connecting single pipe. Further comprising a pipe sleeve for supporting the single pipe from the inside. [Selection] Figure 2A

Description

  The present invention relates to a single pipe connection mechanism for connecting a single pipe and a single pipe to each other in a scaffold, and a scaffold including the same.

  Conventionally, in order to expand a scaffold, a single pipe connection mechanism that connects a single pipe and a single pipe of the scaffold has been proposed (for example, Patent Document 1).

  In the single pipe connection mechanism proposed in Patent Document 1, a single pipe having a connecting pin at the tip is inserted into another single pipe and connected by a connecting pin, and a bolt is attached to each plate extending upward from the single pipe main body. The single pipe and the single pipe are fixed by inserting and tightening.

Japanese Patent Laid-Open No. 11-13275

  However, according to the mechanism proposed in Patent Document 1, only a single tube can be attached and expanded in one direction, and the expansion direction of the scaffold is limited. On the other hand, there are many places where there are bending in the left-right direction and inclination in the up-down direction, such as the vicinity of a ramp on an expressway and the outer peripheral surface of a gas tank. In the mechanism of Patent Document 1, a scaffold cannot be formed along such a portion.

  Thus, it can be said that there is still room for improvement from the viewpoint that the connection direction of the single pipe can be adjusted according to the shape of the object on which the scaffold is formed.

  Accordingly, an object of the present invention is to make it possible to adjust the connection direction of a single tube according to the shape of an object on which the scaffold is formed in a single tube connection mechanism in a scaffold and a scaffold including the same.

  In order to achieve the above object, the present invention is configured as follows.

  According to one aspect of the present invention, there is provided a single tube connection mechanism for connecting a single tube and a single tube to each other in a scaffold, and at least one single clamp capable of gripping the single tube, and fixing the single clamp to the outer peripheral portion. The first connecting single pipe extending adjacent to the single pipe gripped by the single clamp is connected to the same side as the side to which the single clamp is fixed with respect to the first connecting single pipe, A second connecting single pipe having a tip portion capable of holding a single pipe different from the single pipe held by the first connecting single pipe, and the second connecting single pipe being rotatable to the first connecting single pipe A connecting bolt for connecting the first connecting single pipe, the second connecting single pipe and the second connecting single pipe to be rotatably connected to the first connecting single pipe; The first connecting single pipe and the second connecting single pipe extend in the radial direction of the connecting single pipe at a position surrounding the connecting bolt. Further comprising a pipe sleeve for supporting the respective connecting monotube from inside, to provide a single-pipe connecting mechanism.

  Moreover, according to one aspect of the present invention, the single pipe connection mechanism, the first single pipe gripped by the single clamp of the single pipe connection mechanism, and the second connection single pipe of the single pipe connection mechanism are provided. There is provided a suspension scaffold comprising a second single tube held by a tip portion, and extending in such a manner that the axial directions of the first single tube and the second single tube intersect each other.

  Moreover, according to one aspect of the present invention, there is provided a method for expanding a suspended scaffold by connecting a single pipe and a single pipe in a suspended scaffold to each other using a single tube connection mechanism having two connected single tubes. The single pipe already provided in the suspension scaffold is gripped by at least one single clamp fixed to the outer periphery of the first connection single pipe of the single pipe connection mechanism so as to be adjacent to the first connection single pipe And a step of adjusting the rotation posture of the second connecting single pipe rotatably connected to the first connecting single pipe by the connecting bolt on the same side as the side to which the single clamp is fixed, and Holding the single pipe different from the single pipe gripped by the first connecting single pipe by the tip of the second connecting single pipe, and adjusting the rotational posture of the second connecting single pipe The step is a connecting bolt that penetrates both the first connecting single pipe and the second connecting single pipe. As a shaft, the method includes a step of rotating a second connection single pipe with respect to the first connection single pipe, and as a first connection single pipe and a second connection single pipe, at a position surrounding a connection bolt inside the first connection single pipe There is provided a method for extending a suspension scaffold, which uses a pipe sleeve that further includes a pipe sleeve that extends in the radial direction of a connecting single pipe and supports each connecting single pipe from the inside.

  According to the single pipe connection mechanism and the scaffold including the same according to the present invention, the connection direction of the single pipe can be adjusted according to the shape of the object on which the scaffold is formed.

The perspective view of a scaffold provided with the single pipe | tube connection mechanism concerning Embodiment 1. FIG. Perspective view of single pipe connection mechanism Front view of single pipe connection mechanism Plan view of single pipe connection mechanism Flowchart of single pipe connection method by single pipe connection mechanism The figure explaining the connection method of the single pipe by the single pipe connection mechanism The figure which shows the state which changed the posture of the single pipe connection mechanism Flow chart of scaffold expansion method using single pipe connection method with single pipe connection mechanism The figure explaining the expansion method of the scaffold using the connection method of the single pipe by the single pipe connection mechanism Plan view showing the lower structure of the expanded scaffold Plan view showing the upper structure of the expanded scaffold The perspective view which shows the external appearance of the structure in which the expanded scaffold and the scaffold were formed The perspective view which shows the external appearance of the structure in which the expanded scaffold and the scaffold were formed The perspective view which shows the external appearance of the structure in which the expanded scaffold and the scaffold were formed Bottom view showing the appearance of the expanded scaffold and the structure on which the scaffold is formed The perspective view which shows the external appearance of the structure formed by the scaffold extended by the single pipe | tube connection mechanism of Embodiment 2, and a scaffold. The top view which shows the external appearance of the structure in which the scaffold extended by the single pipe | tube connection mechanism of Embodiment 2 and the scaffold was formed. The side view which shows the external appearance of the structure in which the scaffold extended by the single pipe | tube connection mechanism of Embodiment 2 and the scaffold was formed The perspective view which shows the external appearance of the structure in which the scaffold expanded by the conventional construction method and the scaffold were formed A plan view showing the appearance of a scaffold formed by a conventional method and a structure in which a scaffold is formed Side view showing the appearance of a structure formed by a scaffold and a scaffold expanded by a conventional construction method

  According to the first aspect of the present invention, there is provided a single pipe connection mechanism for connecting a single pipe and a single pipe to each other in a scaffold, wherein the single pipe is gripped on the outer peripheral portion. A first connecting single pipe that is fixed and extends adjacent to the single pipe gripped by the single clamp, and is connected to the same side as the side on which the single clamp is fixed with respect to the first connecting single pipe , A second connection single tube having a tip portion capable of holding a single tube different from the single tube held by the first connection single tube, and the second connection single tube being rotatable to the first connection single tube A connecting bolt for connecting to the first connecting single pipe and the second connecting single pipe so that the second connecting single pipe is rotatably connected to the first connecting single pipe. Extending in the radial direction of the connecting single pipe at a position surrounding the connecting bolt inside the first connecting single pipe and the second connecting single pipe. Further comprising a pipe sleeve for supporting the respective connecting monotube from inside Te, provides a single pipe connecting mechanism. Thereby, the connection direction of the single pipe | tube hold | maintained by a 2nd connection single pipe | tube can be made adjustable by adjusting the rotation attitude | position of a 2nd connection single pipe | tube. In addition, since the single clamp and the second connection single pipe are attached to the same side with respect to the first connection single pipe, the scaffold is placed when the scaffold plate is arranged on the single pipe held and held by these members. Steps between the plates are less likely to occur. In this way, it is possible to adjust the connection direction of the single pipe while maintaining safety. Furthermore, by adjusting the gripping posture of the single tube by the single clamp of the first connecting single tube, it becomes possible not only to adjust the horizontal angle by rotating the second connecting single tube, but also to adjust the vertical angle. A more flexible single pipe connection is possible.

  According to the 2nd mode of the present invention, it further has a washer arranged between the 1st connecting single pipe and the 2nd connecting single pipe, and the connection bolt is the 1st connecting single pipe, the washer, and the 2nd. The single pipe connection mechanism according to the first aspect is provided, which penetrates the single connection pipe. Thereby, the connection direction of the single pipe | tube hold | maintained by a 2nd connection single pipe | tube can be made adjustable by adjusting the rotation attitude | position of a 2nd connection single pipe | tube. In addition, since the single clamp and the second connection single pipe are attached to the same side with respect to the first connection single pipe, the scaffold is placed when the scaffold plate is arranged on the single pipe held and held by these members. Steps between the plates are less likely to occur. In this way, it is possible to adjust the connection direction of the single pipe while maintaining safety. Furthermore, by adjusting the gripping posture of the single tube by the single clamp of the first connecting single tube, it becomes possible not only to adjust the horizontal angle by rotating the second connecting single tube, but also to adjust the vertical angle. A more flexible single pipe connection is possible.

  According to the third aspect of the present invention, the distal end portion of the second connection single pipe is a single pipe different from the single pipe held by the first connection single pipe, and the direction in which the second connection single pipe extends. The single pipe connection mechanism according to the first aspect or the second aspect, which is held so as to extend in the same direction, is provided.

  According to the fourth aspect of the present invention, the single pipe connection mechanism according to any one of the first to third aspects, the first single pipe gripped by the single clamp of the single pipe connection mechanism, A second single pipe held by the tip of the second connection single pipe of the pipe connection mechanism, and the axial directions of the first single pipe and the second single pipe extend so as to cross each other. Provide a scaffold.

  According to the fifth aspect of the present invention, using a single pipe connection mechanism including two connection single pipes, the single pipe and the single pipe in the suspension scaffold are connected to each other, and the suspension scaffold is expanded. The single pipe already provided in the suspension scaffold is gripped by at least one single clamp fixed to the outer periphery of the first connection single pipe of the single pipe connection mechanism so as to be adjacent to the first connection single pipe A step of arranging, a step of adjusting a rotation posture of a second connection single pipe rotatably connected by a connection bolt to the same side to which the single clamp is fixed with respect to the first connection single pipe; Holding a single pipe different from the single pipe gripped by the first connection single pipe by the tip of the second connection single pipe, and adjusting the rotational posture of the second connection single pipe Axes the connecting bolt that penetrates both the first connecting single pipe and the second connecting single pipe A step of rotating the second connection single pipe with respect to the first connection single pipe, the first connection single pipe and the second connection single pipe at a position surrounding the connection bolt in the interior, There is provided a method for extending a suspension scaffold, which uses a pipe sleeve that further includes a pipe sleeve that extends in the radial direction of a connecting single pipe and supports each connecting single pipe from the inside.

  According to the sixth aspect of the present invention, the step of adjusting the rotation posture of the second connecting single pipe is performed using the connecting bolt penetrating both the first connecting single pipe and the second connecting single pipe as an axis. The fifth aspect includes a step of rotating the second connection single pipe with respect to the first connection single pipe through a washer disposed between the one connection single pipe and the second connection single pipe. Provide a method for extending the suspension scaffold.

  According to the seventh aspect of the present invention, the step of holding the single pipe different from the single pipe gripped by the first connecting single pipe by the tip of the second connecting single pipe includes the first connecting single pipe. The method for extending a suspended scaffold according to the fifth aspect or the sixth aspect, comprising the step of holding a single pipe different from the single pipe gripped by the pipe so as to extend in the same direction as the direction in which the second connection single pipe extends. .

(Embodiment 1)
FIG. 1 is a perspective view of a single pipe connection mechanism 50 and a scaffold 1 including the same in Embodiment 1. FIG. 8C-8F are views showing the appearance of the scaffold 1 and the structure 26 on which the scaffold 1 is formed.

  The scaffold 1 is installed below or on the side of the structure 26 as a scaffold for a worker to perform repair work on the structure 26 (FIGS. 8C-8E) such as a highway and a bridge. is there. The scaffold 1 in the first embodiment is a suspended scaffold that is fixed by being suspended on the balustrade 11 of the structure 26. The balustrade (high rail) in this specification is an end structure that protrudes upward at the edge of a structure 26 such as a highway or a bridge in order to prevent a vehicle or a person from falling. In the scaffold 1, the worker can perform repair work such as painting the wall surface of the balustrade 11.

  As shown in FIG. 1, the scaffold 1 includes a scaffold plate 2, first horizontal single tubes 3 and 4, a first vertical single tube 5, a fixture 6, an L-shaped member 7, and a second member. Vertical single tube 8, second horizontal single tube 9, third vertical single tube 10, third horizontal single tube 12, and single tube connection mechanism 50. The number of these members shown in FIG. 1 is merely an example, and is not limited to these numbers. FIG. 1 is a diagram in which the main part of FIGS. 8C-8F is extracted, and the number of single tubes is omitted (the number of single tubes may be increased or decreased as appropriate). In FIG. 1, only the scaffold 1 formed on one side surface of the structure 26 is shown, but as shown in FIGS. 8C-8E, a similar scaffold is also formed on the balustrade on the opposite side surface. Below the object 26 are connected to each other in the horizontal direction.

  The single pipe connection mechanism 50 shown in FIG. 1 is connected to the first horizontal single pipe 3. The single pipe connection mechanism 50 can hold the first horizontal single pipe 3 (first single pipe) and can hold a single pipe (second single pipe) different from the first horizontal single pipe 3. Mechanism. By connecting such a single pipe connection mechanism 50 to the scaffold 1, a new single pipe can be connected to the scaffold 1 to sequentially expand the scaffold 1. In particular, the single pipe connection mechanism 50 in the first embodiment is configured to be able to adjust the connection direction of a new single pipe. The specific structure and operation of the single pipe connection mechanism 50 will be described later.

  The scaffold board 2 is a plate-like member that serves as a base for workers to perform work. Each scaffold plate 2 in the first embodiment has a rectangular outer shape having a longitudinal direction A and a short direction B orthogonal to the longitudinal direction A. The first horizontal single tubes 3 and 4 are pipes arranged in the horizontal direction. Each of the first horizontal single tubes 3 and 4 supports the plurality of scaffold plates 2 directly or indirectly. The first horizontal single tube 3 is arranged to extend in the B direction, and the first horizontal single tube 4 is arranged to extend in the A direction below the first horizontal single tube 3. The first horizontal single tube 3 and the first horizontal single tube 4 are orthogonal to each other in plan view, and the intersecting portion is fixed using, for example, an orthogonal clamp (not shown). The first vertical single pipe 5 is a pipe arranged so as to extend along the vertical direction C. One end side (lower side) of the first vertical single tube 5 in contact with the scaffold plate 2 is fixed to the first horizontal single tube 4 by a fixture 6. The other end side (upper side) of the first vertical single tube 5 is fixed to a second horizontal single tube 9 described later.

  An L-shaped member 7 is attached to the end of the first horizontal single tube 4. On the L-shaped member 7, a scaffold plate 13 different from the scaffold plate 2 is placed at a position adjacent to the plurality of scaffold plates 2. A third vertical single tube 10 extending in the vertical direction C is attached to the upper end portion of the L-shaped member 7. By providing the third vertical single tube 10 and the L-shaped member 7, it is possible to attach and arrange a fall-preventing panel or net to these members, and to function as a fall-preventing mechanism.

  The second horizontal single tube 9 disposed above the first horizontal single tube 4 extends in the direction A and is orthogonally clamped to each of the first vertical single tube 5 and the third vertical single tube 10 described above. It is a pipe fixed by (not shown). The second horizontal single tube 9 is disposed along the upper surface of the balustrade 11. A second vertical single pipe 8 is further fixed to the second horizontal single pipe 9.

  A third horizontal single tube 12 is provided between the second horizontal single tube 9 and the first horizontal single tubes 3 and 4. The third horizontal single tube 12 extends in the A direction similarly to the second horizontal single tube 9 and is fixed to each of the first vertical single tube 5 and the third vertical single tube 10. The third horizontal single pipe 12 and the first horizontal single pipe 4 are arranged on the opposite side (inside) to the side where the L-shaped member 7 and the third vertical single pipe 10 are attached. It is connected to a horizontal single pipe extending from a scaffold provided on the opposite side or the structure 26 itself.

  Next, the structure of the single pipe connection mechanism 50 will be described with reference to FIGS. 2A to 2C. 2A to 2C are a perspective view, a front view, and a plan view of the single pipe connection mechanism 50, respectively.

  2A-2C, the single pipe connection mechanism 50 includes a first connection single pipe 14, a second connection single pipe 15, a connecting bolt 16, a nut 17, a washer 18, and two single connections. A clamp 19 and a holding member 20 are provided. The second connection single tube 15 is rotatably attached to the first connection single tube 14. Thereby, the connection direction of the single pipe | tube hold | maintained / connected by the 2nd connection single pipe | tube 15 can be adjusted.

  The first connecting single tube 14 and the second connecting single tube 15 are both single tubular members, and in the first embodiment, single tubes having substantially the same diameter are used. A connecting bolt 16, a nut 17, and a washer 18 are provided at a connection location between the first connecting single pipe 14 and the second connecting single pipe 15. The connecting bolt 16 passes through both the first connecting single pipe 14 and the second connecting single pipe 15, and the nut 17 is arranged to tighten the connecting bolt 16. The rotation posture of the second connecting single pipe 15 with respect to the first connecting single pipe 14 can be adjusted around the connecting bolt 16. The washer 18 is disposed between both members at the connection location of the first and second connection single tubes 14 and 15 and functions as a buffer member.

  The end portion of the first connection single tube 14 and the end portion of the second connection single tube 15 are arranged adjacent to each other in the vertical direction, and the first connection single tube 14 is arranged from the top of the first connection single tube 14 in the overlapping portion in the vertical direction. The connecting bolt 16 is inserted so as to penetrate to the lower part of the two connecting single tubes 15.

  Two single clamps 19 are fixed to the outer periphery of the first connection single tube 14. The two single clamps 19 in the first embodiment are fixed to the same side (for example, the upper side) with respect to the first connection single tube 14 so as to grip one single tube in cooperation. That is, two single clamps 19 are arranged on the same line along the tube axis direction of the first connection single tube 14. On the other hand, the direction of the single clamp 19 is set so that the single pipe gripped by the single clamp 19 and the first connecting single pipe 14 extend adjacently in parallel.

  Similar to the single clamp 19, the second connection single pipe 15 is attached to the same side (for example, the upper side) as the single clamp 19 with respect to the first connection single pipe 14. The second connection single pipe 15 has a distal end portion 15a on the side facing the base end side, with the connection side with the first connection single pipe 14 being the base end side. A holding member 20 is attached to the distal end portion 15a. The holding member 20 is a member that holds a single pipe different from the single pipe held by the single clamp 19. The holding member 20 in the first embodiment is configured as a cylindrical member in the same manner as the first and second connecting single tubes 14 and 15, and more than the first and second connecting single tubes 14 and 15. A thing with a small diameter is used.

  A connecting pin 15b as a rod-like member penetrating the inside is provided at the distal end portion 15a of the second connection single tube 15. The holding member 20 is formed with a recess 20b (FIG. 2B) that fits with the connecting pin 15b and a recess 20a having the same shape as the recess 20b. By fitting the recess 20b of the holding member 20 and the connecting pin 15b of the second connection single pipe 15, the second connection single pipe 15 and the holding member 20 can be attached. On the other hand, a single tube having a connection pin similar to the connection pin 15b of the second connection single tube 15 is fitted into the recess 20a of the holding member 20, thereby enabling the holding member 20 to hold a new single tube. Yes.

  Further, as shown in FIG. 2B, pipe sleeves 29a and 29b are provided inside the first connection single pipe 14 and the second connection single pipe 15 to support the connection single pipes 14 and 15 from the inside. ing. Specifically, a pipe sleeve 29 a is provided at a position surrounding the connecting bolt 16 inside the first connecting single pipe 14. The pipe sleeve 29a extends in the radial direction of the first connecting single tube 14 and is in contact with an opposed position of the inner peripheral portion of the first connecting single tube 14, so that the first connecting single tube 14 is connected from the inside. To support. A pipe sleeve 29 b is provided at a position surrounding the connecting bolt 16 inside the second connection single pipe 15. The pipe sleeve 29b extends in the radial direction of the second connection single pipe 15 and is in contact with an opposed position of the inner peripheral portion of the second connection single pipe 15, so that the second connection single pipe 15 is connected from the inside. To support. The pipe sleeves 29 a and 29 b are both hollow and substantially cylindrical members and extend in the axial direction of the connecting bolt 16. The pipe sleeves 29 a and 29 b having such a configuration function as members that absorb stress when the first and second connecting single tubes 14 and 15 are tightened by the connecting bolt 16.

  A single pipe-to-single pipe connection method using the single pipe connection mechanism 50 configured as described above will be described with reference to the flowchart of FIG. 3 and FIGS. 4 (a) to 4 (d). The methods shown in FIGS. 3 and 4 (a) to 4 (d) are merely examples, and the present invention is not limited to these methods.

  First, the single tube is gripped by the single clamp 19 (step S1). Specifically, the first horizontal single tube 3 already provided in the scaffold 1 is held by the single clamp 19. As shown in FIG. 4A, the two single clamps 19 cooperate to hold the first horizontal single tube 3.

  Next, the holding member 20 is attached (step S2). Specifically, the holding member 20 is attached to the second connecting single tube 15 of the single tube connecting mechanism 50 fixed to the first horizontal single tube 3. As described above, the concave portion 20b of the holding member 20 is fitted to the connecting pin 15b provided at the distal end portion 15a of the second connecting single tube 15. By rotating the holding member 20 in the circumferential direction in the fitted state, the holding member 20 is attached and fixed so as not to come out of the second connecting single pipe 15 (FIG. 4B).

  Next, the rotation posture of the second connection single tube 15 with respect to the first connection single tube 14 is adjusted (step S3). Specifically, in the state where the nut 17 is loosened, as shown in FIG. 4C, the second connecting single pipe 15 is changed to the first connecting single pipe 14 with the connecting bolt 16 as the rotation axis. In contrast, it is rotated by a predetermined angle θ. The predetermined angle θ is a rotation angle of the second connecting single tube 15 with respect to the same direction as the first connecting single tube 14 and the first horizontal single tube 3. In the example shown in FIG. 4C, the second connecting single tube 15 is rotated so as to swing its head in the left-right direction within the horizontal plane.

  Finally, another single pipe is connected (step S4). Specifically, as illustrated in FIG. 4D, the new single tube 3 a is held by the holding member 20 attached to the second connection single tube 15. More specifically, a single tube 3a having a connection pin similar to the connection pin 15b of the second connection single tube 15 is used, and the connection pin of the single tube 3a is fitted into the recess 20a of the holding member 20 and held. Attach to member 20.

  The first horizontal single pipe 3 (first single pipe) and another single pipe 3a (second single pipe) are connected via the single pipe connection mechanism 50 by performing the above-described steps S1-S4. can do. At this time, as shown in FIG. 4 (d), the axial directions of the first horizontal single tube 3 and another single tube 3a can be set so as to intersect each other.

  According to the single pipe connection mechanism 50 according to the first embodiment, the second connection single pipe 15 is rotatably attached to the first connection single pipe 14. Thereby, the connection direction of the single pipe | tube which the 2nd connection single pipe | tube 15 hold | maintains can be adjusted by adjusting the rotation attitude | position of the 2nd connection single pipe | tube 15. The single clamp 19 and the second connection single tube 15 are attached to the same side (for example, the upper side) with respect to the first connection single tube 14. Thereby, when the scaffold board 2 is arrange | positioned on the single pipe | tube hold | gripped by the single clamp 19, and the single pipe | tube hold | maintained by the 2nd connection single pipe | tube 15, it becomes difficult to produce the level | step difference between scaffold boards. As another method, a method of connecting a single pipe and a single pipe using a universal clamp is conceivable. However, in this method, a step is generated between the single pipe and the single pipe, and a scaffold plate is placed on these single pipes. If arranged, a step will occur. On the other hand, according to the single pipe connection mechanism 50 according to the first embodiment, since the steps between the scaffolding plates are unlikely to occur, the connection direction of the single pipe can be adjusted while maintaining safety. .

  Furthermore, according to the single pipe connection mechanism 50 according to the first embodiment, not only the horizontal angle adjustment by the second connection single pipe 15 but also the vertical angle adjustment with respect to the connection direction of the new single pipe. Is possible. In the example shown in FIGS. 4A to 4D, the first connecting single tube 14 is rotated so that the second connecting single tube 15 swings in the horizontal direction in the horizontal plane. Although the posture is fixed, it is not limited to such a case. By changing the gripping posture of the first horizontal single tube 3 by the first connection single tube 14 in step S1, the posture of the single tube connection mechanism 50 can be adjusted. In the example shown in FIG. 5, as compared with the examples shown in FIGS. 4A to 4D, the posture of holding the first horizontal single tube 3 by the first connecting single tube 14 is changed. Thereby, the 2nd connection single pipe 15 can be rotated within the plane inclined with respect to the horizontal surface. In this way, by changing the gripping posture of the first horizontal single tube 3 by the first connecting single tube 14, not only the horizontal angle adjustment by the rotation of the second connecting single tube 15 but also the vertical angle. Adjustment is also possible, and a more flexible single pipe connection is possible.

  In the first embodiment, two single clamps 19 are used. By providing two single clamps 19, the single tube can be gripped more firmly than in the case of providing only one, and safety can be improved. In addition, the first horizontal single tube 3 and the first connecting single tube 14 can be fixed to each other while suppressing the displacement of the respective directions. Furthermore, by using a general-purpose component called a single clamp, the workability when working with the component can be improved, and the versatility of the single-tube connection mechanism 50 can be improved. The manufacturing cost can also be reduced.

  In the first embodiment, a mechanism for rotatably attaching the second connecting single pipe 15 to the first connecting single pipe 14 is realized by using a simple and general-purpose mechanism such as a connecting bolt 16 and a nut 17. doing. As a result, the workability when adjusting the rotation posture of the second connection single pipe 15 can be improved, the versatility of the single pipe connection mechanism 50 can be improved, and the manufacturing cost of the single pipe connection mechanism 50 is also reduced. can do.

  In the first embodiment, the washer 18 is disposed between the first connecting single tube 14 and the second connecting single tube 15. In this way, by causing the washer 18 to function as a buffer member, the rotation posture of the second connection single tube 15 with respect to the first connection single tube 14 can be adjusted smoothly. Furthermore, since the strength of the first and second connection single tubes 14 and 15 can be maintained, safety can be improved.

  In the first embodiment, the single tube is held by the second connecting single tube 15 via the holding member 20. By using the holding member 20 as described above, it is possible to improve workability when holding the single pipe by the second connecting single pipe 15.

  In the first embodiment, the second connecting single tube 15 and the holding member 20 are attached by a simple mechanism of the connecting pin 15b and the recess 20b. Thereby, workability | operativity at the time of attaching the holding member 20 can be improved.

  In the first embodiment, the connecting single pipes 14 and 15 extend in the radial direction at positions where the connecting bolts 16 are surrounded in the first connecting single pipe 14 and the second connecting single pipe 15. Pipe sleeves 29a and 29b for supporting the tubes 14 and 15 from the inside are provided. The pipe sleeves 29 a and 29 b function as members that absorb stress when the first and second connecting single tubes 14 and 15 are tightened by the connecting bolt 16. Therefore, damage to the first and second connection single tubes 14 and 15 can be reduced. Thereby, while being able to hold | maintain the shape of the 1st and 2nd connection single pipes 14 and 15, a lifetime can be lengthened, safety | security can be improved.

  Next, an expansion method for expanding the scaffold 1 using the single pipe connection method by the single pipe connection mechanism 50 described above will be described with reference to the flowchart of FIG. 6 and FIGS. 7 (a) to 7 (f). . 7 (a) to 7 (f) are side views of the scaffold 1 shown in FIG. 1, in which only members necessary for explanation are shown, and other members are not shown ( For example, the fixture 6, the L-shaped member 7, the second vertical single pipe 8, the balustrade 11 and the like).

  First, the single pipe connection mechanism 50 is connected to the scaffold 1 (step S5). Specifically, as shown in FIG. 7A, the scaffold plate 2, the first horizontal single tubes 3, 4, the first vertical single tube 5 (third vertical single tube 10) and the third horizontal In the state where the single pipe 12 is shown, the first connecting single pipe 14 is connected to the first horizontal single pipe 3. A specific method is similar to step S1 described with reference to FIGS. 3 and 4, and the first horizontal single tube 3 is held by a single clamp 19 (not shown).

  Next, the holding member 20 is attached to the second connection single pipe 15 (step S6). Further, the rotation posture of the second connection single pipe 15 is adjusted (step S7). Since the specific method is the same as steps S2 and S3 described with reference to FIGS. 3 and 4, the description thereof will be omitted.

  Next, the temporary single pipe 21 is installed (step S8). Specifically, as shown in FIG. 7B, a temporary single tube 21 is attached under the third horizontal single tube 12 (or the first vertical single tube 5 or the third vertical single tube 10). At this time, the direction (angle θ) in which the second connecting single pipe 15 whose rotational posture is adjusted in step S7 is made to coincide with the direction in which the temporary single pipe 21 is extended.

  Next, the support tube 22 is installed (step S9). Specifically, as shown in FIG. 7C, the support tube 22 inserted through the movable support tube 23 is fixed to the temporary single tube 21. The movable support tube 23 is a pipe that is inserted into the support tube 22 and is slidably held in the support tube 22. The support tube 22 having such a moving support tube 23 is fixed in a state parallel to the temporary single tube 21 using a predetermined clamp member.

  Next, the movable support tube 23 and the support tube 22 are connected to the new single tube 3a (step S10). Specifically, as shown in FIG. 7 (d), a new single tube 3a is prepared, the tip of the single tube 3a and the tip of the movable support tube 23 are connected by the first connecting member 24, and A portion slightly behind the tip of the tube 3 a and the support tube 22 are connected by a second connecting member 25. In the example shown in FIG. 7D, the first and second connecting members 24 and 25 both use chain-like connecting members.

  Next, the movable support tube 23 and the new single tube 3a are sent out in front of the scaffold 1 (step S11). Specifically, in the state where one worker (not shown) placed on the scaffolding plate 2 has the single tube 3a and another worker (not shown) has the movable support tube 23, As shown to 7 (e), both the single tubes 3a and 23 are simultaneously sent ahead. At this time, the rear end of the new single pipe 3 a is aligned with the holding member 20 of the single pipe connection mechanism 50.

  Next, the new single tube 3a is connected to the holding member 20 (step S12). Specifically, the holding member 20 holds the rear end of the single tube 3a sent forward in the previous step S11. A specific method is the same as that in step S4 described with reference to FIGS.

  By performing steps S5 to S12 described above, another single pipe 3a can be newly connected to the scaffold 1.

  Thereafter, the horizontal single tube 4a is disposed below the single tube 3a, the scaffold plate 2a is disposed on the single tube 3a, and the vertical single tube 5a is disposed on the scaffold plate 2a. As shown, a new scaffold 1a similar to the scaffold 1 can be formed. Thereafter, while the temporary single tube 21 and the support tube 22 are used while being slid in the scaffold formation direction, the steps S5-S12 are repeated to sequentially form and expand the expanded scaffold having the same structure as the scaffold 1a. Yes (slide method). According to such a slide construction method, since the worker can expand the scaffold only by working on the scaffolding plates 2 and 2a, the scaffold can be quickly and safely used without using an aerial work vehicle or the like. Can be assembled. Thus, it can be said that the scaffolding can be formed and repair work can be performed without blocking highways and bridges, which is excellent in convenience.

  Note that the order of steps S5 to S12 is not limited to the example shown in FIG. As long as the scaffold having the same structure as the scaffolds 1 and 1a can be formed, the order of the steps may be appropriately changed. Moreover, you may increase / decrease the number of scaffolding boards, single pipes, etc. as needed. Depending on the increase / decrease, the number of scaffolding plates or single tubes used in steps S5 to S12 or the order of the steps may be appropriately changed.

  An example of an external view of the scaffold expanded by the above method is shown in FIGS. 8A to 8F. FIG. 8A is a plan view of the lower stage of the scaffolds 1 and 1a (the stage where the first horizontal single tubes 3 and 4 are disposed). FIG. 8B is a plan view of the upper stage of the scaffolds 1 and 1a (stage where the support pipe 22 and the movable support pipe 23 are arranged). FIGS. 8C-8F show the appearance of the scaffolds 1, 1a and the expressway 26 as an object on which the scaffolds are formed. The angle in the connecting direction of the single pipe shown in FIGS. 8A and 8B is shown larger than the actual angle for the sake of explanation. For example, a straight distance of 150 m may be required to rotate the connection direction of the single pipe by 90 degrees.

  According to the method for extending the scaffold 1 of the first embodiment, the connection direction of the single tube 3a held by the second single connection tube 15 can be adjusted by adjusting the rotational posture of the second single connection tube 15. It can be. Further, since the single tube connection mechanism 50 in which the single clamp 19 of the first connection single tube 14 and the second connection single tube 15 are attached to the same side of the first connection single tube 14 is used. When the scaffolding plates 2 and 2a are disposed on the single tubes 3 and 3a, a step between the scaffolding plates is less likely to occur. Thereby, the safety | security of the worker who performs work on the scaffolding plates 2 and 2a can be maintained. Thus, according to the method for extending the scaffold 1 of the first embodiment, it is possible to adjust the connection direction of the single tubes 3a while maintaining safety.

  Furthermore, in step S5, by adjusting the holding posture of the first horizontal single tube 3 by the single clamp 19, not only the horizontal angle adjustment by the rotation of the second connection single tube 15 but also the vertical angle. Adjustment is also possible (see FIG. 5). For example, there are many places where not only left and right turns but also up and down slopes exist, such as the vicinity of ramps on highways. According to the scaffold expansion method of the first embodiment, it is possible to cope with both the bending in the left-right direction and the inclination in the vertical direction, so that a safer scaffold suitable for such a place can be formed.

(Embodiment 2)
In the first embodiment, the “suspending scaffold” provided on the expressway has been described as an example. However, the scaffold 1 in this specification is not limited to the suspended scaffold, and is generally a scaffold such as a scaffold that is used without being suspended on a structure. including. For example, in a large tank for storing city gas, LP gas, industrial gas, etc., the present invention can be applied to a scaffold used by being attached to the outer peripheral surface of the tank. Embodiment 2 demonstrates the example which applied the single pipe | tube connection mechanism 50 mentioned above to the scaffold in a tank. The description common to the first embodiment will be omitted, and the difference will be mainly described.

  An application example of the second embodiment is shown in FIGS. 9A to 9C. As shown in FIGS. 9A to 9C, the single pipe connection mechanism 50 can also be applied to the tank 30 for containing gas or the like. 9A to 9C show a spherical tank as an example of the tank 30. FIG.

  A comparison between the method using the single pipe connection mechanism 50 of the second embodiment and the method using a conventional orthogonal clamp will be described with reference to FIGS. 10A to 10C in addition to FIGS. 9A to 9C. FIGS. 10A to 10C are assembly drawings of scaffold plates according to the conventional method, and correspond to FIGS. 9A to 9C, respectively.

  As shown in FIGS. 10A to 10C, in the conventional method, the horizontal single pipe 42 is disposed so as to extend in the horizontal direction from the outer surface of the tank 30, and the horizontal single pipe 41 and the horizontal single pipe 42 are connected by the orthogonal clamp 40. . Furthermore, the scaffolding plates 43 disposed on the horizontal single tube 42 are disposed so as to overlap each other at the end portions. In such a form, a step is generated between the adjacent scaffold plates 43.

  On the other hand, as shown in FIGS. 9A-9C, in the construction method of the second embodiment, on the outer surface of the tank 30, the horizontal single tube 4 extending in the horizontal direction and the vertical single tube 28 extending in the vertical direction (upward) are provided. It is fixed. The horizontal single tube 4 and the horizontal single tube 3 are fixed by an orthogonal clamp 27a, and the vertical single tube 28 and the horizontal single tube 3 are fixed by another orthogonal clamp 27b. Further, the horizontal single tubes 3 are connected to each other using a single tube connection mechanism 50. In such a connection form, the scaffolding plate 2 is supported by each single pipe so that an operator on the scaffolding plate 2 can perform various operations on the outer surface of the tank 30. According to such a form, since it connects using the single pipe connection mechanism 50, the horizontal single pipe 4 which supports the scaffold board 2 can be arrange | positioned in the same height position, and between scaffold boards 2 mutually It is possible to prevent the level difference from occurring. Thereby, it is possible to prevent the operator who performs the work on the scaffolding board 2 from tripping, and the carriage can be used. For this reason, safety can be improved dramatically and work efficiency can also be improved.

  As for the market environment, the import of natural gas currently exceeds the import of oil, and the future energy base of Japan has completely shifted to natural gas. In that sense, an increase in the number of spherical tanks for natural gas storage is expected in the future, compared with the conventional cylindrical tanks for oil storage, and the environment for increasing demand for spherical tanks has been prepared.

  Although the present invention has been described with reference to the first and second embodiments, the present invention is not limited to the first and second embodiments. For example, in the first and second embodiments, the case where a new single pipe is held and connected via the holding member 20 has been described. However, the present invention is not limited to such a case. For example, the second connecting single pipe 15 may directly hold a new single pipe without providing the holding member 20. In this case, a recess similar to the recess 20a of the holding member 20 is provided at the tip of the second connecting single tube so that the tip of the second connecting single tube has a structure capable of directly holding the single tube. May be formed.

  In the first and second embodiments, the case where the two single clamps 19 are provided in the first connection single tube 14 has been described. However, the present invention is not limited to such a case, and one or three or more single clamps 19 are provided. May be. By providing two or more single clamps 19, the first horizontal single pipe 3 can be more stably fixed. In addition, when two single clamps 19 are provided as in the first and second embodiments, the first horizontal connection mechanism 50 is simplified without making the configuration of the single pipe connection mechanism 50 excessively complicated. The single tube 3 can be stably fixed.

  In the first and second embodiments, the case where the first horizontal single tubes 3 and 4, the second horizontal single tube 9 and the third horizontal single tube 12 are arranged to extend in the horizontal direction has been described. In addition to such a case, the structure 26 may be tilted up and down from the horizontal direction according to the tilt of the structure 26 or the like.

  The present invention is applicable to any single pipe connection mechanism for connecting a single pipe and a single pipe to each other in a scaffold and a scaffold including the single pipe connection mechanism. In particular, the single-tube connection mechanism is effective in places where there are left-right bends and up-down inclinations, so it can be used for scaffolds installed on the outer peripheral surface of tanks and suspension scaffolds installed near ramps on expressways. Useful.

DESCRIPTION OF SYMBOLS 1 Scaffolding 2 Scaffolding board 3 1st horizontal single pipe (1st single pipe)
3a Single pipe (second single pipe)
4 First horizontal single pipe 5 First vertical single pipe 6 Fixture 7 L-shaped member 8 Second vertical single pipe 9 Second horizontal single pipe 10 Third vertical single pipe 11 Railing 12 Third horizontal Single pipe 13 Scaffold plate 14 First connection single pipe 15 Second connection single pipe 16 Connecting bolt 17 Nut 18 Washer 19 Single clamp 20 Holding member 21 Temporary single pipe 22 Support pipe 23 Moving support pipe 24 First connection member 25 Second connecting member 26 Structure 27a Orthogonal clamp 27b Orthogonal clamp 28 Vertical single pipe 29a Pipe sleeve 29b Pipe sleeve 50 Single pipe connection mechanism

Claims (7)

A single pipe connection mechanism for connecting a single pipe and a single pipe in a scaffold,
At least one single clamp capable of gripping a single tube;
A first connecting single tube that is fixed to the outer periphery of the single clamp and extends adjacent to the single tube held by the single clamp;
A tip portion that is connected to the same side as the side to which the single clamp is fixed with respect to the first connection single pipe and that can hold a single pipe different from the single pipe held by the first connection single pipe. A second connecting single tube having
A coupling bolt for rotatably coupling the second connection single pipe to the first connection single pipe,
The connecting bolt penetrates the first connecting single pipe and the second connecting single pipe and rotatably connects the second connecting single pipe to the first connecting single pipe.
A single pipe further comprising pipe sleeves extending in the radial direction of the connection single pipe and supporting each connection single pipe from the inside at a position surrounding the connection bolt in the first connection single pipe and the second connection single pipe Connection mechanism. A washer disposed between the first connecting single pipe and the second connecting single pipe;
The single-tube connection mechanism according to claim 1, wherein the connection bolt penetrates the first connection single pipe, the washer, and the second connection single pipe.   The distal end portion of the second connection single pipe holds a single pipe different from the single pipe held by the first connection single pipe so as to extend in the same direction as the direction in which the second connection single pipe extends. Item 3. The single pipe connection mechanism according to item 1 or 2. The single pipe connection mechanism according to any one of claims 1 to 3,
A first single pipe gripped by a single clamp of a single pipe connection mechanism;
A second single pipe held by the tip of the second connection single pipe of the single pipe connection mechanism,
A scaffold in which the axial directions of the first single pipe and the second single pipe extend so as to cross each other. A method for extending a suspension scaffold by connecting a single pipe and a single pipe in a suspension scaffold to each other using a single tube connection mechanism having two connection single tubes,
The single pipe already provided in the suspension scaffold is gripped by at least one single clamp fixed to the outer periphery of the first connection single pipe of the single pipe connection mechanism so as to be adjacent to the first connection single pipe Placing step;
Adjusting the rotation posture of the second connection single pipe rotatably connected to the first connection single pipe by the connection bolt on the same side as the side on which the single clamp is fixed;
Holding a single pipe different from the single pipe gripped by the first connecting single pipe by the tip of the second connecting single pipe,
The step of adjusting the rotation posture of the second connecting single pipe is a second step with respect to the first connecting single pipe with the connecting bolt penetrating both the first connecting single pipe and the second connecting single pipe as an axis. Rotating the connecting single tube of
The first connection single pipe and the second connection single pipe further include pipe sleeves extending in the radial direction of the connection single pipe and supporting each connection single pipe from the inside at a position surrounding the connection bolt inside the first connection single pipe and the second connection single pipe A method for extending the suspension scaffold.   The step of adjusting the rotation posture of the second connection single pipe includes the first connection single pipe and the second connection around the connection bolt penetrating both the first connection single pipe and the second connection single pipe. The method for extending a suspension scaffold according to claim 5, comprising the step of rotating the second connecting single pipe with respect to the first connecting single pipe through a washer disposed between the single pipes.   The step of holding the single pipe different from the single pipe held by the first connecting single pipe by the tip of the second connecting single pipe is a single pipe different from the single pipe held by the first connecting single pipe. The method for extending a suspended scaffold according to claim 5 or 6, comprising a step of holding the tube so as to extend in the same direction as the direction in which the second connecting single tube extends.

Images