JP3129321U - Single pipe fitting - Google Patents

Abstract

The present invention relates to a plurality of single pipes and joint fittings connected in series, and enables disassembly of the single pipe and joint fitting at an arbitrary portion, and enables local removal of a part of a continuous single pipe handrail and the like.
A single pipe joint fitting (1) of a single pipe scaffold includes an outer pipe (2), a fixed inner pipe (3), a guide rod (4), and a movable inner pipe (5). The guide rod regulates the movement of the movable inner pipe in the axial center (XX) direction and the rotational direction. The movable inner tube moves between a protruding position (I) that protrudes from the outer tube and engages with the locking pin of the single tube, and a retracted position (II) that is disengaged from the locking pin and retracts into the outer tube. .
[Selection] Figure 1

Description

  The present invention relates to a single pipe joint fitting, and more particularly to a single pipe joint fitting for a single pipe scaffold that connects a plurality of single pipes for scaffolds in series.

  As temporary working scaffolds used in construction sites for construction and civil engineering, single pipe scaffolds, bracket scaffolds, bitty scaffolds, suspended scaffolds, overhang scaffolds, and the like are known. The single pipe scaffold is a temporary scaffold having a structure in which a single steel pipe is assembled using a binding metal fitting, a joint metal fitting, and the like, and is used in many construction sites.

  In the work passage formed by the cloth frame of the single pipe scaffold, a handrail for preventing fall is usually provided. Generally, a handrail is formed along a work path by connecting a plurality of single pipes in series and horizontally with joint fittings. If desired, a plurality of single-pipe handrails are arranged along the work path.

  As a joint fitting for connecting single pipes in series, a single pipe joint fitting in which an annular large-diameter portion (collar) and a small-diameter portion having a circular cross-section are concentrically and integrally connected is conventionally employed. The small-diameter portion extends on both sides of the large-diameter portion and is inserted into the open ends of the single tubes on both sides. At the end of the single pipe, a locking pin (detent pin) that penetrates the single pipe in the diameter direction is attached. On the other hand, an L-shaped groove that can receive the pin is formed in the small diameter portion of the single pipe fitting. Is done. The small diameter portion inserted into the open end of the single tube is rotated with the pin received in the L-shaped groove, and the pin is locked in the L-shaped groove. Single pipe joint fittings having such a pin and L-groove locking mechanism are described in, for example, Japanese Patent Application Laid-Open Nos. 7-18851 and 7-243257. The single pipe fitting is also called a single pipe joint or a straight joint. In addition, a single pipe joint fitting with a tight fitting (clamp member) is also known.

  FIG.10 and FIG.11 is the perspective view and front view which show the structure and usage method of the conventional single pipe joint metal fitting.

  As shown in FIG. 10, the single pipe joint fitting A is formed of a tubular member in which a central large-diameter portion B and small-diameter portions C on both sides are integrated. The small diameter portion C is concentrically connected to both sides of the large diameter portion B. A pair of L-shaped grooves D are formed at the open ends of the small diameter portions C.

The small-diameter end C of the single pipe fitting A is inserted into the open end of the single pipe F as shown in FIG. A locking pin G penetrating the single pipe F in the diameter direction is fixed to the single pipe F. When the single pipe joint fitting A is rotated in the direction of the arrow with the pin G inserted into the L-shaped groove D, The pin G is locked to the L-shaped groove D, and the single pipe joint fitting A is connected to and locked to the single pipe F as shown in FIG. Next, the single pipe H is assembled to the single pipe fitting A so that the opposite small-diameter end C is inserted into the open end of the single pipe H, and the L-shaped groove D forms the single pipe H in the diametrical direction. The penetrating locking pin I is received. When the single pipe H is rotated in the direction of the arrow, the single pipe H is connected to the single pipe joint fitting A and locked as shown in FIG. By sequentially connecting the single pipe and the joint fitting in this way, a large number of single pipes can be connected in series, thereby forming a horizontal handrail extending over the entire length of the scaffold on the single pipe scaffold. it can.
JP-A-7-18851 JP-A-7-243257

  In an actual construction work, it may be necessary to partially and transiently remove the handrail of the temporary scaffolding for carrying in large equipment or carrying in materials according to the progress of the construction. However, according to the structure of the conventional single pipe joint bracket in which the single pipe and the joint bracket are sequentially connected to construct the continuous handrail, the single pipe and the joint are removed in accordance with the reverse operation procedure of the connection in order to partially remove the handrail. After disassembling the metal fittings sequentially and removing a large number of single pipes over a fairly wide area, the single pipe handrails must be reconstructed except for specific areas. That is, in a handrail in which a single pipe is connected using a conventional single pipe joint fitting, not only the single pipe in the area where the handrail needs to be removed, but also a wide range of single pipes far beyond this must be temporarily removed. In addition, it is not possible to locally remove only the single tube in the area where the handrail needs to be removed.

  The present invention has been made in view of such problems, and the object of the present invention is to locally remove only a specific single pipe with respect to a large number of single pipes connected in series by a single pipe joint fitting. It is to provide a single pipe joint fitting that enables the above.

In order to achieve the above object, the present invention has an annular large-diameter portion and a small-diameter portion having a circular cross section that is concentrically disposed on both sides of the large-diameter portion and integrated with the large-diameter portion. Is a single pipe joint fitting of a single pipe scaffold that is locked to the end of the single pipe by rotating relative to the single pipe in a state of being inserted into the end opening of the single pipe for scaffolding,
An outer tube (2) constituting the large-diameter portion;
A fixed inner pipe (3) fixed to the outer pipe (2) and forming the small diameter portion on one side of the outer pipe (2);
A movable inner pipe (5) inserted in the outer pipe (2) and projecting in the axial direction from the outer pipe (2) so as to form the small diameter portion on the opposite side of the outer pipe (2);
A guide rod (4) that engages with the outer tube (2) and restricts or prohibits the rotation of the movable inner tube (5);
The guide rod (4) moves integrally with the movable interior pipe (5) in the axial direction,
The movable inner pipe (5) is protruded from the outer pipe (2) and inserted into the end opening of the single pipe according to the guide of the guide rod (4), and the outer pipe ( 2) To provide a single pipe fitting that moves to a retracted position (II) to be retracted.

  According to the above configuration of the present invention, the single pipe joint bracket is the same as the conventional single pipe joint bracket in that the small diameter portion (the fixed inner pipe (3) and the movable inner pipe (5) is inserted into the end opening of the single pipe. ) On both sides and sequentially connecting the single pipe and the joint fitting, it is possible to connect a large number of single pipes in series. Accordingly, a horizontal handrail or the like extending over the entire length of the scaffold can be formed on the single pipe scaffold by the single pipe joint fitting and the single pipe.

  When disassembling the single pipe fitting and the single pipe, rotate the single pipe to be removed with respect to the movable inner pipe (5), then move the movable inner pipe (5) to the retracted position (II) and move it. The interior pipe (5) may be retracted into the exterior pipe (2). By retracting the movable inner pipe (5), the end of the single pipe to be removed can move in the horizontal direction or the vertical direction. By moving the end of the single tube in the lateral direction or the vertical direction with respect to the axis, only the single tube to be removed can be moved in the direction of the axis without interfering with other single tubes. The opposite end of the single pipe is usually connected to other single pipe fittings (the single pipe fittings of the present invention or the conventional single pipe fittings). By moving in the core direction, the connection with other single pipe joint fittings can be released. Thus, the single pipe whose both ends are released from the single pipe joint fitting can be detached from the handrail alone.

  According to the single pipe joint fitting of the present invention, only a specific single pipe can be locally removed with respect to a large number of single pipes connected in series by the single pipe joint fitting.

  According to a preferred embodiment of the present invention, the movable inner pipe (5) is integrated with the single pipe locking portion (6) protruding from the outer pipe (2) and the single pipe locking portion (6), An in-tube moving part (7) that moves in the pipe (2) is formed, and the inner end of the in-pipe moving part (7) is inserted into the fixed interior pipe (3). When the movable inner pipe (5) is retracted to the retracted position (II), the in-pipe moving part (7) moves into the fixed inner pipe (3). According to such a configuration, the movable inner tube (5) can be moved without increasing the length of the outer tube (2) constituting the large-diameter portion. Preferably, the total length of the single pipe locking portion (6) is such that the inner end of the single pipe locking portion (6) is in contact with or close to the inner end of the fixed interior pipe (3) in the retracted position (II). Set to do.

  Preferably, a pair of L-shaped grooves (33, 63) that engage with locking pins at the end of the single pipe are formed at the outer ends of the movable inner pipe (5) and the fixed inner pipe (3). The movable inner pipe (5) and the fixed inner pipe (3) are fixed to the end of the single pipe by the locking pins being locked in the L-shaped grooves (33, 63).

  More preferably, the outer tube (2) has a pair of slots (long holes) (21) extending in the axial direction, and the guide rod (4) is formed from a bolt / nut assembly passing through the slot (21). Become. The bolt penetrates the movable inner tube (5) so as to move integrally with the movable inner tube (5) in the axial direction. The slot (21) guides the bolt / nut assembly in the axial direction and restricts or prohibits the rotation of the movable inner pipe (5).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view, a front view, a plan view and a transverse sectional view showing an embodiment of a single pipe joint fitting according to the present invention. 2 is an exploded sectional view of the single pipe joint fitting shown in FIG. 1, and FIG. 3 is a front view, a plan view, and a vertical sectional view of the single pipe joint fitting showing the retracted position of the movable interior pipe.

  The single pipe fitting 1 is composed of an outer tube 2, a fixed inner tube 3, a guide rod (guide rod) 4 and a movable inner tube 5. The outer tube 2, the fixed inner tube 3, and the movable inner tube 5 are arranged concentrically around the axis XX. The outer tube 2 is formed with a large-diameter portion or a collar on the single-tube joint fitting 1 so that the end portions (indicated by phantom lines in FIG. 1) of the single tubes 8 and 9 can be abutted. The fixed inner pipe 3 protrudes from the outer pipe 2 in the axial center (XX) direction, and a small diameter portion that can be inserted into the open end of the single pipe 8 is formed in the single pipe joint fitting 1. The movable inner tube 5 includes a single tube locking portion 6 that protrudes from the outer tube 2 in the axial direction, and an in-pipe moving portion 7 that extends from the single tube locking portion 6 into the outer tube 2. The single pipe engaging portion 6 forms a small diameter portion that can be inserted into the open end of the single pipe 9 in the single pipe joint fitting 1. The guide rod 4 is supported by the outer tube 2 so as to be movable in the axial direction, and engages with the movable inner tube 5 to guide the movable inner tube 5 in the axial direction.

  As shown in FIG. 2, the outer tube 2 is made of a steel tube having a true circular cross section having an inner diameter d1, and a pair of slots (long holes) 21 extending in the axial direction are symmetrical with respect to the axial core. Is drilled. As shown in FIG. 1 (D), the guide rod 4 is composed of a steel hexagon bolt 41 and a steel nut 42 that is screwed to the tip screw portion of the bolt 41. By fastening the nut 42 to the tip screw portion of the bolt 41, the bolt 41 and the nut 42 are moored to the outer tube 2 so as to be movable along the slot 21.

  The fixed inner tube 3 is made of a steel tube material having a true circular cross section having an outer diameter substantially the same as the inner diameter d1 of the outer tube 2. The inner end portion 31 of the fixed inner pipe 3 is inserted into the opening end of the outer pipe 2 and is integrally fixed to the outer pipe 2 by welding or the like using the welding hole 22. The outer end portion 32 of the fixed inner pipe 3 protrudes outward in the axial direction from the opening end of the outer pipe 2. A pair of L-shaped grooves 33 whose ends are open are formed at the distal end portion of the outer end portion 32.

  The single tube locking portion 6 is made of a steel tube material having a true circular cross section having an outer diameter substantially the same as or slightly smaller than the inner diameter d1 of the outer tube 2. A pair of L-shaped grooves 63 whose ends are open are formed in the outer end 62 of the single tube locking portion 6. The in-pipe moving part 7 is made of a steel pipe having a true circular cross section that is concentrically joined to the single pipe locking part 6. The outer end 72 of the in-pipe moving part 7 is inserted into the inner end 61 of the single pipe locking part 6 and is integrated with the inner end 61 by fixing means such as welding. Circular holes 63 and 73 through which the bolts 41 can be inserted are formed at the joint portion between the outer end portion 72 and the inner end portion 61.

  The in-pipe moving part 7 is inserted into the outer tube 2. As shown in FIG. 1D, the shank portion of the hexagon bolt 41 passes through the circular holes 63 and 73. If desired, the bolt 41 may be fixed to the single pipe engaging part 6 and / or the in-pipe moving part 7 by fixing means such as welding.

  The fixed interior pipe 3 and the single pipe locking part 6 have the same inner diameter d2. The in-pipe moving part 7 has an outer diameter that is substantially the same as or slightly smaller than the inner diameter d2 of the fixed inner pipe 3 and the single pipe locking part 6. As shown in FIG. 1A, the inner end 71 of the in-pipe moving part 7 is inserted into the inner end 31 of the fixed interior pipe 3. The outer peripheral surface of the in-pipe moving part 7 is in sliding contact with the inner peripheral surface of the fixed interior pipe 3.

  The movable inner pipe 5 moves in the axial direction together with the bolt 41 and the nut 42. The slot 21 restricts or prohibits the rotation of the movable inner pipe 5 by guiding the movement of the bolt 41 and the nut 42 in the axial direction. The movable inner tube 5 moves in the axial direction in the outer tube 2 with the movement of the bolt 41 in the slot 21.

  FIG. 3 shows a state in which the movable inner pipe 5 is completely retracted into the outer pipe 2 (retraction position II). The inner end 61 of the single pipe locking part 6 is in contact with or close to the inner end 31 of the fixed interior pipe 3 at the retracted position II. The outer end portion 62 of the single tube engaging portion 6 is stationary in a state where it is substantially flush with the end surface of the outer tube 2 at the retracted position II. The total length L1 of the single tube locking part 6 is set in advance so that such a form of the retracted position II is obtained. If desired, the total length L1 may be set so that the single tube locking portion 6 is stationary with the outer end 62 slightly retracted from the end surface of the outer tube 2, or a disassembly operation described later (FIG. 9). As long as (B)) is not hindered, the total length L1 may be set so that the outer end portion 62 slightly protrudes from the end surface of the outer tube 2.

  When the movable inner pipe 5 is moved to the retracted position II, the single pipe locking portion 6 slides on the inner wall surface of the outer tube 2, and the inner tube moving portion 7 slides on the inner wall surface of the fixed inner tube 3. The movement of the movable inner pipe 5 is regulated by the slot 21 and the guide rod 4, and the movable inner pipe 5 is stationary at the retracted position II shown in FIG. Note that the inclination of the movable inner pipe 5 (inclination with respect to the axis XX) that may occur during the movement of the movable inner pipe 5 is regulated by the inner wall surfaces of the outer pipe 2 and the fixed inner pipe 3.

  Thus, the movable inner tube 5 is displaced between the protruding position (FIG. 1, position I) completely protruding from the outer tube 2 and the retracted position (FIG. 3, position II) completely retracted into the outer tube 2. .

  4 to 7 are front views showing a single pipe connection method using the single pipe joint fitting 1.

  FIG. 4 shows a process of connecting and locking the single pipe joint fitting 1 to the single pipe 8 for the handrail of the single pipe scaffold that has already been constructed. The single pipe 8 is connected to another single pipe joint bracket (a single pipe joint bracket of the present invention or a conventional single pipe joint bracket) at an end portion (not shown) opposite to the illustrated end portion. Already connected to a tube (not shown).

  The single pipe 8 is composed of a steel single pipe 81 for scaffolding having a true circular cross section, and a steel locking pin (rotating stop pin) 82 is fixed to the open end of the single pipe 81. The pin 82 penetrates the single pipe 81 in the diameter direction. The fixed interior pipe 3 of the single pipe joint fitting 1 is inserted into the single pipe 81 in a state where the open end of the L-shaped groove 33 is aligned with the pin 82. When the single pipe joint fitting 1 is rotated in the direction of the arrow when the pin 82 is completely accommodated in the L-shaped groove 33, the single pipe joint fitting 1 is concentrically connected to the single pipe 8 as shown in FIG. And locked.

  Next, as shown in FIG. 5, the single pipe 9 is connected to the single pipe joint fitting 1. As with the single pipe 8, the single pipe 9 is composed of a steel single pipe 91 for scaffolding having a true circular cross section with a steel locking pin (detent pin) 92 fixed to the open end. The pin 92 penetrates the single pipe 91 in the diameter direction. By aligning the pin 92 with the open end of the L-shaped groove 63 and moving the single pipe pipe 91 in the axial direction, the single pipe locking portion 6 is inserted into the single pipe pipe 91 as shown in FIG. The

  When the single pipe 91 is rotated in the direction of the arrow shown in FIG. 6 when the pin 92 is completely accommodated in the L-shaped groove 63, the single pipe 9 is attached to the single pipe fitting 1 as shown in FIG. Concentrically connected and locked.

  FIG. 8 is a plan view showing a handrail of a single pipe scaffold formed by connecting a plurality of single pipes in series by the single pipe joint fitting 1, and FIG. 9 is a single view showing the state of the single pipe joint fitting when the connection is released. It is a front view of a pipe fitting metal fitting.

  A handrail of a single pipe scaffold constructed using the single pipe joint fitting 1 is shown in FIG. The single pipe 9 connected in series to the single pipe 8 by the single pipe joint fitting 1 is fastened to the building pipe 11 of the single pipe scaffold by the tight fitting (clamp member) 12. The single pipe 10 is further connected to the end of the single pipe 9 by another single pipe joint fitting 1 '(single pipe joint fitting of the present invention or a conventional single pipe fitting).

  The single tubes 8, 9, 10 form a continuous straight tubular handrail on the single tube scaffold. For example, a handrail in the specific area 15 shown in FIG. It may be necessary to remove it transiently. FIG. 8B to FIG. 8E show a step of removing the handrail of the span between building lots corresponding to the specific region 15.

  First, the binding forces of the three fastening fittings 12 (the fastening fittings 12A: 12B: 12C shown in FIG. 8B) fixing the single pipe 9 are released, and the restriction of the single pipe 9 is released. The single tube 9 is released so as to be freely rotatable. Next, as indicated by an arrow in FIG. 8C, the single pipe 9 is rotated, and the single pipe joint fitting 1 and the single pipe 9 are relatively rotated to a position where they can be separated (FIG. 9A).

  FIG. 9A shows a state of the single pipe joint fitting 1 that can be separated from the single pipe 9. As shown in FIG. 9A, when the L-shaped groove 63 rotates relative to the rotational position at which the pin 92 can be released as the single tube 9 rotates, the pin 92 moves in the axial direction relative to the L-shaped groove 63. Therefore, the movable inner tube 5 and the single tube 9 can be relatively displaced in the axial direction.

  In this state, when the movable inner tube 5 is drawn into the outer tube 2 and the movable inner tube 5 is moved to the retreat position II (FIG. 3), the single tube 9 is a single tube joint as shown in FIG. 9B. The engagement with the metal fitting 1 is released, and as a result, it is possible to move in the direction (lateral direction or vertical direction) orthogonal to the axis XX. As shown in FIG. 8D, when the single tube 9 is inclined, the single tube 9 can be moved in the tube length direction without interfering with the single tube 8. The other end of the single pipe 9 connected to the single pipe fitting 1 ′ is disconnected from the single pipe 9 and the single pipe fitting 1 ′ by rotating the single pipe 9 and moving in the pipe length direction. It is burned.

  Thus, the single pipe 9 having both ends released from the single pipe joint fittings 1, 1 'can be detached from the fastening fitting 12 (12A: 12B: 12C) alone.

  After the single pipe 9 is removed, the relatively short single pipe 16 is connected to the single pipe joint fitting 1 as shown in FIG. 9 (E), and is fastened to the building pipe 11 by the fastening fitting 12 (12A: 12B: 12C). Is done. As a result, the specific region 15 from which the handrail is removed is formed between the single tube 16 and the single tube 10.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications or variations can be made within the scope of the present invention described in the claims of the utility model registration. It can be changed.

For example, the single pipe joint bracket of the present invention may be used not only as a single pipe joint bracket for a handrail single pipe but also as a single pipe joint bracket for connecting single pipes in other parts.
Further, the outer tube, the fixed inner tube, and the movable inner tube may be close to each other with a slight gap or clearance.
Further, a mechanical element other than the bolt / nut assembly may be employed as the guide rod.

  The present invention is applied to a single pipe joint fitting for connecting single pipes of a single pipe scaffold in series. According to the single pipe joint bracket of the present invention, since the connection of the single pipe and the joint bracket can be released at an arbitrary portion with respect to a large number of single pipes and joint brackets coupled in series, Only a part of the single tube can be removed locally. Therefore, when a single pipe of a handrail is connected by the single pipe joint fitting of the present invention, it is possible to locally remove any part of the handrail or replace it with a short single pipe. An effect is obtained.

It is the longitudinal cross-sectional view which shows the Example of the single pipe joint metal fitting which concerns on this invention, the front view, the top view, and a cross-sectional view. It is a disassembled sectional view which shows the component of the single pipe joint metal fitting shown in FIG. It is the front view, top view, and longitudinal cross-sectional view of the single pipe joint metal fitting which show the retreat position of a movable interior pipe. It is a front view which shows the single pipe connection method using a single pipe joint metal fitting, and the process of connecting and locking a single pipe joint metal fitting (1) to the single pipe (8) of the handrail already constructed is shown. It is a front view showing a single pipe connection method using a single pipe fitting, showing the process of connecting another single pipe (9) to the single pipe fitting (1) locked to the end of the single pipe Yes. It is a front view which shows the single pipe connection method using a single pipe fitting, and the process of locking the single pipe (9) connected to the single pipe fitting to the single pipe fitting (1) is shown. It is a front view which shows the single pipe connection method using a single pipe joint metal fitting, and the state which connected the single pipe (8,9) of both sides in series by the single pipe joint metal fitting (1) is shown. It is a top view which shows the handrail of the single pipe scaffold formed by connecting a some single pipe in series with a single pipe joint metal fitting, The process for removing the handrail of the span between specific buildings is illustrated. It is a front view of the single pipe joint metal fitting which shows the state of the single pipe joint metal fitting at the time of connection release. It is a perspective view which shows the structure of the conventional single pipe joint metal fitting. It is a front view which shows the single pipe connection method using the conventional single pipe joint metal fitting.

Explanation of symbols

1 Single pipe fitting 2 Exterior pipe 3 Fixed interior pipe 4 Guide rod (Guide rod)
5 Movable interior pipe 6 Single pipe locking part 7 In-pipe moving part 8, 9, 10, 16 Single pipe 21 Slot (long hole)
41 Hexagon bolt 42 Nut 82, 92 Locking pin (Non-rotating pin)
XX shaft core

Claims (4)

An annular large-diameter portion, and a small-diameter portion having a circular cross section that is concentrically disposed on both sides of the large-diameter portion and integrated with the large-diameter portion, and the small-diameter portion is formed at the end opening of the single tube for scaffold In the single pipe joint bracket of the single pipe scaffold that locks to the end of the single pipe by rotating relative to the single pipe in the inserted state,
An outer tube (2) constituting the large-diameter portion;
A fixed inner pipe (3) fixed to the outer pipe and forming the small diameter portion on one side of the outer pipe;
A movable inner tube (5) inserted in the outer tube and projecting in the axial direction from the outer tube so as to form the small diameter portion on the opposite side of the outer tube;
A guide rod (4) that engages with the outer tube and restricts or prohibits the rotation of the movable inner tube;
The guide rod moves in the axial direction integrally with the movable interior pipe,
The movable inner pipe moves from a protruding position (I) that protrudes from the outer pipe and is inserted into an end opening of the single pipe, and a retracted position (II) that is drawn into the outer pipe according to the guidance of the guide rod. A single pipe fitting.   The movable inner pipe is composed of a single pipe locking part protruding from the outer pipe, and an in-pipe moving part that is integrated with the single pipe locking part and moves in the outer pipe, and an inner end of the in-pipe moving part is The single pipe joint bracket according to claim 1, wherein the single pipe joint bracket extends into the fixed interior pipe.   The total length of the single pipe locking part is set so that the inner end of the single pipe locking part is in contact with or close to the inner end of the fixed interior pipe at the retracted position. Single pipe joint bracket as described in 1.   The outer tube has a pair of slots extending in the axial direction, and the guide rod includes a bolt and nut assembly that passes through the slot, and the bolt of the assembly passes through the movable inner tube. The single pipe joint metal fitting according to any one of claims 1 to 3, wherein:

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