JP2006132251A - Steel pipe scaffold, construction method for building using the steel pipe scaffold, joint for steel pipe scaffold, and base fixture and plug for steel pipe scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel pipe scaffold enabling the easy routing of an air hose for pneumatic-operated tools and capable of increasing workability in using the pneumatic-operated tools, a construction method for a building using the steep pipe scaffold, a joint for the steel pipe scaffold capable of easily constructing the steel pipe scaffold, and a metal fixture and a plug for the steel pipe scaffold. <P>SOLUTION: This steel pipe scaffold comprises a plurality of column parts formed by vertically connecting steel pipes to each other and is installed in a construction site having a plurality of working areas in the vertical direction. At least one column part is so formed to communicate at least some of the vertically connected steel pipes with each other and maintain the inside of the communicated steel pipes in an airtight state. Openable air vent hole communicating with the steel pipes brought in an airtight state are formed in the column part at a plurality of positions in the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steel pipe scaffold for facilitating the construction of a building using a pneumatic tool, a method for constructing a building using the steel pipe scaffold, a joint for a steel pipe scaffold capable of easily constructing the steel pipe scaffold, and a steel pipe. The present invention relates to a base bracket for a scaffold and a stopper for a steel pipe scaffold.

  When assembling a building or painting a wall, etc., two types of steel pipe scaffolds, a single pipe scaffold or a frame scaffold, are first placed around the building frame and the building, which are generally constructed construction sites (For example, refer nonpatent literature 1) Assembling one of them as a scaffold, it is made to work safely also in a high place.

  By the way, there are power tools and pneumatic tools as hand-held power tools. Hitachi Koki's pneumatic impact driver WH10AC, electric impact driver WH6DC (battery 7.2V), electric impact driver WH12DK (battery 12V) , Electric impact driver WH10VA2 (single-phase 100V) Table 1 comparing the product specifications described in the catalog, and Air Soak KS-35 as a pneumatic saw, Makita Co., Ltd. as an electric saw Small reciprocating saw JR1000FT (single phase 100V), Saber saw CR13VC (single phase 100V) manufactured by Hitachi Koki Co., Ltd. Saber saw CR17Y (single phase 100V) manufactured by Hitachi Koki Co., Ltd. Saber saw CR18DV (manufactured by Hitachi Koki Co., Ltd.) Compare product specifications in each catalog of battery 18V) As shown in Table 2, the pneumatic tool has an advantage that it is lightweight and can be efficiently operated in a short time compared to the electric tool.

However, as shown in Tables 1 and 2, the pneumatic tools are less used at actual work sites, although they have the advantage of being lighter, smaller, and better in performance than electric tools.
The cause is considered to be due to, for example, the following problems when using a pneumatic tool.

That is, as shown in FIG. 20, the air moving tool 100 has to pull the air hose 300 from the air compressor 200 installed on the ground to the work area where the work of the steel pipe scaffold 400 is to be performed. The air hose 300 must be extended from the ground as the floor is reached. Therefore, the higher the floor, the longer it takes to route the air hose and the more labor is required.
When using a pneumatic tool simultaneously in a plurality of work areas on different floors, the air hose 300 must be pulled from the ground for each work area, which complicates the work site.

Published by Japan Standards Association: Japanese Industrial Standards JIS A 8951 Steel Pipe Scaffold (Revised July 1, 1995)

  In view of the above circumstances, the present invention is a steel pipe scaffolding that can easily perform the work of air hoses of a pneumatic tool and can improve the workability using the pneumatic tool, and the construction of a building using the steel pipe scaffold. It is an object of the present invention to provide a method, a steel pipe scaffolding joint, a steel pipe scaffolding base bracket, and a steel pipe scaffolding plug, which can easily construct the steel pipe scaffolding.

  In order to achieve the above object, a steel pipe scaffold according to the present invention is a steel pipe scaffold provided in a construction site having a plurality of column parts formed by connecting steel pipes vertically and having a plurality of work areas in the vertical direction. The at least one column portion is formed so that at least some of the vertically connected steel pipes communicate with each other and the inside of the communicated steel pipes is maintained in an airtight state, The air pipe is communicated with the airtight steel pipe and can be opened and closed at a plurality of positions in the vertical direction of the column portion.

In the steel pipe scaffold according to the present invention, the air vent has at least a tip part of which a plug or a socket provided at the tip of the air hose is detachable, and is opened when the plug or socket is attached, and the steel pipe and the air hose Is preferably formed by a socket or plug having a valve body that closes the air vent in an airtight state when the plug or socket is not attached.
The air vents are preferably provided at least for each work area, and are not provided on the building frame or building land constituting the column part, but for steel pipe scaffolds such as pedestal joints and single pipe joints. It is preferably provided on a steel pipe scaffolding base fitting or the like such as a joint, a jack-type base fitting, or a fixed base fitting.

The building construction method according to the present invention includes assembling the steel pipe scaffold of the present invention, connecting an air hose from the compressed air supply means to any air vent of the column, and supplying compressed air into the column. In addition, an air vent near the work area and an air moving tool are connected to perform construction using the air moving tool.
In the present invention, the pneumatic tool is not particularly limited. For example, an impact wrench, impact driver, drill, nailing machine, saw, ratchet wrench, sander, grinder, chimney, etc. And those using compressed air itself such as blowers and dust collectors.

  The steel pipe scaffold joint according to the present invention has steel pipe fitting portions at both ends, one steel pipe fitting portion is fitted to a pipe end of a steel pipe constituting the steel pipe scaffold, and the other steel pipe fitting portion is a steel pipe. In a steel pipe scaffolding joint that is fitted to the pipe ends of other steel pipes constituting the scaffold and connects the steel pipes and the steel pipes, both steel pipes have a cylindrical hollow part with openings at both ends that penetrate between the steel pipe fitting parts. The fitting portion is characterized by being provided with a seal (sealing device) that is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe and that hermetically isolates the inside and outside of the steel pipe.

  The steel pipe scaffolding joint of the present invention preferably includes an air vent that communicates with the cylindrical hollow portion and can be connected from the outside in a state in which both the steel pipe fitting portions are fitted to the steel pipe.

  The steel pipe scaffolding base metal fitting according to the present invention is a steel pipe scaffolding base metal fitting having a bottom plate and a steel pipe fitting portion fitted to a pipe end of a steel pipe erected on the bottom plate. It is characterized in that it is provided with a seal that is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe and that isolates the inside and outside of the steel pipe in an airtight manner.

  The steel pipe scaffolding base bracket of the present invention includes a cylindrical hollow part having a bottomed cylindrical shape that penetrates through the steel pipe fitting part and is open on the distal end side of the steel pipe fitting part, and the cylindrical hollow part. It is preferable to provide an air vent which can be connected from the outside in a state where the steel pipe fitting portion is fitted to the steel pipe.

  A plug for a steel pipe scaffold according to the present invention has a steel pipe fitting part fitted to a pipe end of a steel pipe constituting the steel pipe scaffold, and the steel pipe fitting part is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe. It is characterized by having a seal that hermetically isolates the inside and outside of the steel pipe.

  Further, the steel pipe scaffolding plug of the present invention penetrates the inside of the steel pipe fitting portion and has a cylindrical hollow portion having a bottomed cylindrical shape that is open on the distal end side of the steel pipe fitting portion, and the cylindrical hollow portion. It is preferable to provide an air vent that communicates and can be connected from the outside in a state where the steel pipe fitting portion is fitted to the steel pipe.

  Further, in the steel pipe scaffolding joint, the steel pipe scaffolding base bracket and the steel pipe scaffolding plug of the present invention, the air vent has at least a tip part of which a plug or a socket provided at the tip of the air hose is detachable. Or, it is formed by a socket or plug with a valve body that is opened when the socket is attached, makes the steel pipe communicate with the air hose, and closes the air vent when the plug or socket is not attached. Is preferred. In this way, as a socket that forms at least the tip of the air vent, for example, a high coupler (high coupler is a trademark) TW type socket SM type (for female screw mounting), purge high coupler PVR manufactured by Nitto Kohki Co., Ltd. A commercially available type such as a socket type SM (for female screw mounting) can be used.

In the present invention, the material of the seal used for the steel pipe fitting portion is not particularly limited, and examples thereof include a rubber-like elastic body, cloth-filled rubber, synthetic resin, felt, leather, and other soft materials.
The shape of the seal is not particularly limited as long as the inside and outside of the steel pipe can be isolated airtight.

  In the present invention, the steel pipe is not particularly limited, but generally a galvanized steel pipe or a stainless steel pipe is used. Further, the steel pipe scaffolding joint, the steel pipe scaffolding base metal fitting, and the steel pipe scaffolding plug are not particularly limited. However, it is preferable to form a portion to which the excessive weight is made of a galvanized steel material or a stainless steel material.

  As described above, in the steel pipe scaffold according to the present invention, at least one of the column parts communicates with each other at least some of the steel pipes connected vertically, and the inside of the connected steel pipes is airtight. It is formed so as to be held in a state and communicates with the steel pipe in the airtight state, and air vents that can be opened and closed are provided at a plurality of locations in the vertical direction of the column portion. If an air hose from an air compressor is connected to one of the provided air vents, and compressed air is fed from the air compressor, the column portion will be filled with compressed air. If the pneumatic tool is connected to one of the air vents, the pneumatic tool can be used in the work area. That is, it is easy to route the air hose of the pneumatic tool, and the workability using the pneumatic tool can be improved.

Further, the steel pipe scaffold of the present invention has an air vent, at least the tip of the air vent, a plug or socket provided at the tip of the air hose is detachable, and is opened when the plug or socket is attached. If the inside and the air hose are in communication with each other, and the plug or socket is not installed, the air vent is closed in an airtight state. The inside and the air hose can be easily communicated with each other and the air vent can be kept airtight, thereby improving workability.
Furthermore, if the steel pipe scaffold of the present invention is configured such that the air vent is provided at least for each work area, the length of the air hose connected to the pneumatic tool can be shortened. The routing work becomes easier.

  The construction method of the building concerning this invention assembles the steel pipe scaffolding of Claim 1 or Claim 2 in a construction site, and connects the air hose from a compressed air supply means to the air vent of either of a pillar part. In addition to supplying compressed air into the column part, connecting the air vent near the work area and the pneumatic tool, and using the pneumatic tool, construction of the air hose is facilitated, Work with pneumatic tools is easier.

The steel pipe scaffold joint according to the present invention has steel pipe fitting portions at both ends, one steel pipe fitting portion is fitted to a pipe end of a steel pipe constituting the steel pipe scaffold, and the other steel pipe fitting portion is a steel pipe. In a steel pipe scaffolding joint that is fitted to a pipe end of another steel pipe constituting the scaffold and connects the steel pipe and the steel pipe,
It has a cylindrical hollow part with openings at both ends that penetrate between both steel pipe fitting parts, and both steel pipe fitting parts are pressed against the inner surface of the steel pipe in a fitted state to the steel pipe, and have a seal that hermetically isolates the inside and outside of the steel pipe Therefore, only by connecting the steel pipe and the steel pipe forming the column part of the steel pipe scaffold via this joint, the steel pipe and the steel pipe of the column part can communicate with each other and be connected to the outside in an airtight state. Therefore, the steel pipe scaffold of the present invention can be easily constructed.

  The steel pipe scaffolding base metal fitting according to the present invention is a steel pipe scaffolding base metal fitting having a bottom plate and a steel pipe fitting portion fitted to a pipe end of a steel pipe erected on the bottom plate. Since it has a seal that is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe and hermetically isolates the inside and outside of the steel pipe, the steel pipe fitting part is fitted to the steel pipe that is the lowest end of the column part of the steel pipe scaffold. The lower end of the pillar portion can be easily sealed by simply supporting Therefore, the steel pipe scaffold of the present invention can be easily constructed.

  A plug for a steel pipe scaffold according to the present invention has a steel pipe fitting part fitted to a pipe end of a steel pipe constituting the steel pipe scaffold, and the steel pipe fitting part is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe. Since it has a seal that isolates the inside and outside of the steel pipe in an airtight manner, the upper end of the column part can be sealed only by fitting the steel pipe fitting part to the steel pipe that is the uppermost end of the column part of the steel pipe scaffold. Can do. Therefore, the steel pipe scaffold of the present invention can be easily constructed.

  Further, the steel pipe scaffolding joint, the steel pipe scaffolding base bracket and the steel pipe scaffolding plug of the present invention include a steel pipe scaffolding joint, wherein the steel pipe scaffolding joint has a cylindrical hollow part with openings at both ends penetrating between both steel pipe fitting parts. The metal fitting and the steel pipe scaffolding plug each have a cylindrical hollow portion with a bottomed cylindrical shape that is open at the distal end side of the steel pipe fitting portion, and communicate with the cylindrical hollow portion to fit the steel pipe. If the structure is equipped with an air vent that can be connected from the outside with the part fitted to the steel pipe, it can be used in place of the conventional steel pipe scaffolding joint, steel pipe scaffolding base bracket, and steel pipe scaffolding plug. The steel pipe scaffold of the present invention can be easily obtained. That is, the other members of the steel pipe scaffold need only be conventional ones, so that the steel pipe scaffold of the present invention can be obtained at low cost.

  Furthermore, the steel pipe scaffolding joint, the steel pipe scaffolding base bracket and the steel pipe scaffolding plug of the present invention are detachable with an air vent and a plug or socket provided at the tip of the air hose with at least the tip of the air vent. It is formed by a socket or plug with a valve body that is opened when the plug or socket is attached to bring the inside of the steel pipe into communication with the air hose and closes the air vent in an airtight state when the plug or socket is not attached. With this configuration, it is possible to easily maintain the communication state between the steel pipe and the air hose and the airtight state of the air vent by attaching and detaching the air hose, and the workability is improved.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 7 show a first embodiment of a steel pipe scaffold according to the present invention.

As shown in FIG. 1, this steel pipe scaffold A is a framework scaffold, and is an construction site by assembling parts such as a building frame 1a, a cloth frame (or a cloth frame with a floor) 1b, and a cross brace 1e. It is provided along the wall W of the object, and the provisions stipulated in Section 2 “Scaffolding” of Chapter 10 “Passage, Scaffolding, etc.” of Part 2 “Safety Standards” of the Occupational Safety and Health Regulations, and Japanese Industrial Standards JIS A 8951 “Steel Pipe Scaffolding” as well as Basic No. 401012 “Guidelines for Handrail Precedence Method” established by the Ministry of Health, Labor and Welfare on April 1, 2003, will not be damaged.
And each pillar part 10a, 10b is formed by connecting the steel pillar leg pillar 11 which comprises the building frame 1a to an up-down direction.

  Moreover, among these pillar parts 10a and 10b, the upper and lower leg pillars 11 are used as the joints for steel pipe scaffolds of the present invention shown in FIGS. Jack-type base metal fitting 2b as the base metal fitting for steel pipe scaffolding of the present invention shown in FIG. 2 and FIG. The steel pipe scaffolding plug 2c of the present invention shown in FIGS. 2, 6 and 7 is attached to the upper end of the pedestal 11 which is supported by the above and constitutes the uppermost end of the column part 10a of the A to U parts. Further, the column part 10b other than the parts a to u is not shown, but the pedestal 11 is connected using a conventional pedestal joint and is supported using a conventional jack-type base fitting. .

  As shown in FIG. 3, the pedestal joint 2 a includes a flange portion 21 and steel pipe fitting portions 22 provided on both sides of the flange portion 21, from one steel pipe fitting portion 22 to the other steel pipe fitting. A cylindrical hollow portion 23 penetrating to the joint portion 22 is provided inside.

As shown in FIG. 4, both the steel pipe fitting parts 22 are provided with a main body part 22a, an O-ring 22b as a seal, and a locking part of the O-ring 22b. The main body portion 22 a has an outer diameter that is substantially the same as or slightly smaller than the inner diameter of the steel pipe that forms the pedestal 11.
The locking portion is connected to the end portion of the main body portion 22a on the insertion side to the pedestal 11, and includes an engagement recess 22d and a locking collar portion 22e as shown in FIG.

The engaging recess 22d has a tapered surface whose outer diameter gradually decreases toward the end of the steel pipe fitting portion 22 on the insertion side to the leg pillar 11.
The locking collar 22e is connected to the end of the engagement recess 22d on the insertion side to the pedestal 11 and has a maximum outer diameter that is substantially the same as or slightly smaller than the main body 22a.

  The O-ring 22b has a ring shape with a circular cross section, and is externally fitted to the engaging recess 22d. The inner diameter of the O-ring 22b is always in close contact with the tapered outer peripheral surface of the engaging recess 22d, and the outer diameter is When fitted into the engaging recess 22d, it is formed so as to have a diameter that is substantially the same as or slightly larger than the maximum diameter of the inner diameter tolerance of the steel pipe constituting the pedestal 11. That is, if the O-ring 22b is a pedestal 11 having an inner diameter within an inner diameter tolerance range as shown in FIG. 4 (b), the O-ring 22b is reliably between the inner surface of the pedestal 11 and the outer peripheral surface of the engaging recess 22d. Compressed state.

  The flange portion 21 is drilled so that two screw holes 21a communicate with the cylindrical hollow portion 23, and has an air vent with a screw tube portion 51 provided at one end and a socket 52 provided at the other end. The pipe joint 5 is integrated by screwing the screw cylinder portion 51 into the screw hole 21a.

  The socket 52 is detachable with a plug (not shown) provided at the tip of an air hose H1 (H2, H3), which will be described later, and the cylindrical hollow portion 23 and the air hose H1 (H2, H3) when the plug is attached. And a valve body (not shown) for closing the pipe joint 5 in an airtight state when the plug is not attached.

  This pedestal joint 2a is as described above, and by fitting the steel pipe fitting portions 22 at both ends to the upper and lower pedestals 11 until the end surfaces of the pedestals 11 abut against the flange portions 21, respectively. The pedestal 11 and the pedestal 11 can be connected. In this connected state, the O-ring 22b is compressed between the inner surface of the pedestal 11 and the outer peripheral surface of the engaging recess 22d so that compressed air does not leak from the connecting portion. Further, in the case of this steel pipe scaffold A, the retaining metal fitting 11b is suspended between the locking pins 11a of the cross bars 1e provided on the upper and lower leg pillars 11 at the connecting portion between the leg pillars 11 and 11. The pillar 11 is prevented from coming off from the pillar joint 2a.

As shown in FIG. 5, the jack-type base metal fitting 2 b includes a floor plate (base plate) 24, a screw cylinder 25, an adjustment nut 26, and a connection metal fitting 27.
The floor plate 24 is formed of a rectangular plate material.

The screw tube 25 includes a steel pipe fitting portion 25f, a screw tube main body portion 25b, and a pipe joint connecting portion 25d, and penetrates from the steel pipe fitting portion 25f to the pipe joint connecting portion 25d. It has a cylindrical hollow portion 25a having a bottomed cylindrical shape in which the front end side in the mating direction is in an open state. The cylindrical hollow portion 25a is sealed in an airtight state by fixing the lower end of the screw cylinder 25 to the floor plate 24 by welding or the like.
The screw cylinder body 25b is threaded on its outer peripheral surface, and an adjustment nut 26 described later is screwed into the screw cylinder main body 25b.
The steel pipe fitting portion 25f has the same shape as the steel pipe fitting portion 22 of the pedestal column joint 2a.

  The pipe joint connecting portion 25d is formed so that two screw holes 25e (only one appears in the figure) communicate with the cylindrical hollow portion 25a. And the pipe joint 5 used as an air vent is being fixed to the pipe joint connection part 25d by screwing the screw cylinder part 51 of the pipe joint 5 similarly to the leg pillar joint 2a to this screw hole 25e.

The adjustment nut 26 includes a nut body 26a and a handle 26b.
The nut main body 26a is screwed into the screw cylinder main body portion 25b, and can be adjusted up and down while receiving the lower end of the pedestal 11 by rotating with the handle 26b. Yes.

  The connecting fitting 27 includes a handle clamp part 27a and a leg pillar clamp part 27b. The handle 26b is clamped by the handle clamp part 27a, and the lower end part of the leg pillar 11 is clamped by the leg pillar clamp part 27b. It prevents the pedestal 11 from coming off due to the pressure of.

  As shown in FIGS. 6 and 7, the steel pipe scaffolding plug 2 c includes a plug main body 28 and a connection fitting 29. The plug main body 28 has a steel pipe fitting portion 28a and a head portion 28b, and is open at the front end side in the fitting direction of the steel pipe fitting portion 28a, and has a cylindrical hollow shape having a bottomed cylindrical shape reaching the head portion 28b. A portion 28c is provided.

  The steel pipe fitting part 28a has the same structure as the steel pipe fitting part 22 of the pedestal column joint 2a. In FIG. 7, the female 28g is an O-ring as a seal.

The head portion 28b has a screw hole 28d communicating with the cylindrical hollow portion 28c on the wall surface, and the screw tube portion 51 is screwed into the screw hole 28d in the same manner as the pedestal joint 2a. The pipe joint 5 is fixed.
Further, an insertion hole 28f of the locking pin 7 described later is formed at a position off the cylindrical hollow portion 28c of the head portion 28b.

The connecting metal fitting 29 includes two arm portions 29d disposed so as to sandwich the pedestal 11 from both sides, and a connecting portion 29a that connects the arm portions 29d in a state of facing each other.
The arm portion 29d is provided with a locking hole 29e of a locking pin 7 to be described later on the open end side.

  The connecting portion 29a is formed in a shape surrounding the substantially half circumference of the pedestal 11, and a locking hole 29b through which the locking pin 11a of the crossing bar 1e provided in the pedestal 11 is inserted is formed at the center. It is installed.

And this steel pipe scaffolding plug 2c inserts the locking pin 11a into the locking hole 29b provided in the connecting part 29a with the arm part 29d facing upward, and supports the connecting metal fitting 29 to the pedestal 11, The steel pipe fitting portion 28a of the plug main body 28 is fitted to the uppermost pedestal 11 so that the insertion hole 28f of the head portion 28b coincides with the locking hole 29e of the arm portion 29d. Then, the insertion locking portion 71 of the locking pin 7 is inserted from the locking hole 29e of one arm portion 29d through the insertion hole 28f of the plug body 28 toward the locking hole 29e of the other arm portion 29d. Thus, it is attached in a state in which it is prevented from coming off from the pedestal 11.
That is, the locking pin 7 includes an insertion locking portion 71 and a locking lever 72.

The insertion locking portion 71 has a cylindrical shape that is substantially the same as or slightly smaller in diameter than the inner diameter of the locking hole 29e and the insertion hole 28f, and a locking head 71a that is larger in diameter than the locking hole 29e and the insertion hole 28f is provided. The other end is provided with a slit 71b.
The slit 71b has a tapered surface 71c on the wall surface on the locking head 71a side.

The locking lever 72 has a plate shape whose thickness is slightly thinner than the width of the slit 71b, a long hole 72a is formed in the longitudinal direction of the locking lever 72, and a corner portion at one end in the longitudinal direction. Is cut out at an angle along the tapered surface 71c of the slit 71b.
The locking lever 72 is rotatable about the pivot pin 71d as a result of the pivot pin 71d provided in the slit 71b being inserted into the elongated hole 72a, and the elongated hole 72a. It is slidable in the long axis direction.

  The locking pin 7 has the tapered surface 71c facing upward, and the notched portion of the locking lever 72 is received by the tapered surface 71c so that the longitudinal axis of the locking lever 72 and the axis of the insertion locking portion 71 are aligned. With the locking lever 72 side at the top in the substantially matched state, the insertion hole of the plug main body 28 is inserted from the locking hole 29e of the one arm portion 29d until the locking head 71a hits the outer wall surface of the one arm portion 29d. The insertion locking portion 71 is inserted through 28f toward the locking hole 29e of the other arm portion 29d. Next, the locking lever 72 protruding outside from the locking hole 29e of the other arm portion 29d is pulled in the axial direction of the long hole 72a until the notch portion is disengaged from the tapered surface 71c. The insertion locking part 71 is prevented from coming off by rotating around the support pin 71d, and the insertion locking part 71 prevents the stopper 2c from coming off.

  In this steel pipe scaffold A, the column parts 10a of the A to U parts shown in FIG. 1 connect the upper and lower leg pillars 11 via the leg pillar joint 2a, and the lowermost leg pillar 11 is connected to the jack-type base metal fitting 2b. Since the steel pipe scaffolding plug 2c is attached to the upper end of the uppermost leg column 11, for example, as shown in FIG. 1, the jack-type base metal fitting 2b of the A and A column parts 10a is provided. A plug provided at the tip of the air hose H1 from the air compressor AC as the compressed air supply means of the present invention is fitted into the socket 52 of one pipe joint 5, and the jack-type base metal fitting 2b of the columnar portion 10a is fitted. The socket 52 of the other pipe joint 5 is fitted with a plug provided at one end of the connecting air hose H2, and the socket of one pipe joint 5 of the jack-type base metal fitting 2b of the columnar portion 10a is connected. When compressed air is supplied from the air compressor AC in a state where the plug provided at the other end of the connecting air hose H2 is fitted to the joint 52, the compressed air is filled into the interior of the columnar portion 10a of the u. .

Then, as shown in FIG. 1, any pipe joint 5 in the vicinity of the work area of the column part 10a of the A to U parts and the air distributor 54 are connected by an air hose H3, and the air moving tool 55 is air By connecting to the distributor 54, the work in the work area can be easily performed.
Further, when moving to the next work area, the connection between the pipe joint 5 and the air distributor 54 is released, the air distributor 54 and the air moving tool 55 are carried to the next work area, and the pipe joint near the work area. 5 and the air distributor 54 may be connected again by the air hose H3.

Further, when working in a plurality of work areas at the same time, each pneumatic tool 55 may be connected to the pipe joint 5 in the vicinity of each work area via the air distributor 54.
Note that the pneumatic tool 55 may be directly connected to the pipe joint 5 via the air hose H3 instead of the air distributor 54. Also, a structure in which a fitting recess or a fitting cylinder portion into which the lower end of the handrail column is fitted is provided on the side surface of the upper end of the uppermost leg column 11 or the upper end of the stopper 2c, and the handrail column and the handrail are provided on the uppermost portion. It does not matter.

8 and 9 show another example of the pedestal joint used for the steel pipe scaffold A. FIG.
The pedestal joint 3a shown in FIG. 8 has a steel pipe fitting portion 30 having a cylindrical fitting portion main body 30a and a truncated cone shaped seal 30b fixed to the insertion side end of the fitting portion main body 30a. Except for being provided, it is the same as the pedestal joint 2a.

  In the pedestal joint 3b shown in FIG. 9, the steel pipe fitting portion 31 includes a cylindrical fitting portion main body 31a and a substantially bell-shaped seal 31b fixed to the insertion side end of the fitting portion main body 31a. Except for being provided, it is the same as the pedestal joint 2a.

10 to 15 show a second embodiment of the steel pipe scaffold according to the present invention.
As shown in FIG. 10, the steel pipe scaffold B is a single pipe scaffold, and the column portion 4 a of the key portion of the column portions 4 a and 4 b is a vertical steel pipe as shown in FIG. 11. As shown in FIG. 14 and FIG. 15, the steel pipe scaffolds of the present invention are constructed by connecting the built land 41 to each other through a single pipe joint 6 a as a joint for steel pipe scaffolds of the present invention. A steel pipe scaffolding plug 6b of the present invention is mounted on the upper end of a building 41 that is supported by a fixed base metal fitting 6c as a base metal fitting and constitutes the uppermost end. Moreover, although the pillar part 4b other than the hook part is not shown in the drawing, the vertical steel pipe building sites 41 are connected to each other by using a conventional single pipe joint, and the lowest building site 41 is provided. Is supported using a conventional fixed base metal fitting.

As shown in FIG. 12, the single pipe joint 6 a is locked at a position corresponding to the locking pin insertion hole 42 provided in the building 41 with the steel pipe fitting portion 61 fitted in the building 41. It has the same structure as the pedestal joint 2a except that it includes pin insertion holes 62 and an O-ring 62a is fitted on the inner surface of the locking pin insertion hole 62.
In FIG. 12, 61a is a main body portion, 61b is an O-ring as a seal, 61d is an engaging recess, 61e is a locking collar portion, 63 is a flange portion, 64 is a cylindrical hollow portion, and 5 is a pipe joint. .

And this single pipe joint 6a is connected with the building ground 41 through the following locking pins 7 used for the conventional steel pipe scaffold. That is, the locking pin 7 includes an insertion locking portion 71 and a locking lever 72.
The insertion locking portion 71 has a cylindrical shape that is substantially the same or slightly smaller in diameter than the inner diameters of the locking pin insertion hole 42 and the locking pin insertion hole 62 and substantially the same as or slightly larger than the inner diameter of the O-ring 62a. A locking head 71a having a diameter larger than that of the stop pin insertion hole 42 is provided, and a slit 71b is provided at the other end.

The slit 71b has a tapered surface 71c on the wall surface on the locking head 71a side.
The locking lever 72 has a plate shape whose thickness is slightly thinner than the width of the slit 71b, a long hole 72a is formed in the longitudinal direction of the locking lever 72, and a corner portion at one end in the longitudinal direction. Is cut out at an angle along the tapered surface 71c of the slit 71b.

  The locking lever 72 is rotatable about the pivot pin 71d as a result of the pivot pin 71d provided in the slit 71b being inserted into the elongated hole 72a, and the elongated hole 72a. It is slidable in the long axis direction.

That is, this single pipe joint 6a can connect the building site 41 and the building site 41 as follows.
First, the flange portion 63 abuts on the end surface of the building 41 and the end portions of the upper and lower building sites 41 to be connected so that the locking pin insertion holes 62 coincide with the locking pin insertion holes 42 of the building land 41. Both steel pipe fitting parts 61 are fitted.

  Next, with the locking pin 7 facing the taper surface 71c upward, the notch portion of the locking lever 72 is received by the taper surface 71c, and the longitudinal axis of the locking lever 72 and the axis of the insertion locking portion 71 are With the locking lever 72 side at the top, the locking pin 72 is inserted from one locking pin insertion hole 42 side of the building 41 until the locking head 71a hits the outer wall surface of the building 41. After passing through the holes 62, 62 toward the other locking pin insertion hole 42, the notch portion of the locking lever 72 that has come out from the other locking pin insertion hole 42 is disengaged from the tapered surface 71c. Even if the locking lever 72 is rotated around the pivot pin 71d by pulling it in the axial direction of the long hole 72a to the position, and the force in the pulling direction (the locking head 71a direction) is applied to the locking pin 7, The locking lever 72 is locked to the outer wall surface of the building 41. To. That is, the locking pin 7 prevents the single pipe joint 6a from coming off from the building 41.

  The upper and lower building grounds 41 connected by the single pipe joint 6a are in communication with each other via the cylindrical hollow portion 64 of the single pipe joint 6a, and are connected to the inside of the building land 41 by the O ring 62a and the O ring 61b. The outside is isolated in an airtight state.

As shown in FIGS. 11 and 13, the steel pipe scaffold plug 6b is not provided with an insertion hole 28f in the head 65 like the head 28b of the steel pipe scaffold plug 2c. Except having the same steel pipe fitting part 61, it is the same as the plug 2c for steel pipe scaffolds. In FIG. 13, 5 is a pipe joint.
That is, the steel pipe scaffolding plug 6b has a head 65 that abuts on the upper end surface of the uppermost building 41, and the locking pin insertion hole 42 of the building 41 and the locking pin insertion hole of the steel pipe fitting 61. After fitting the steel pipe fitting part 61 to the building site 41 so that it matches 62, the locking pin 7 similar to the single pipe joint 6 a is used to prevent the steel pipe fitting part 61 from coming off from the building site 41. It has become.

As shown in FIGS. 14 and 15, the fixed base metal fitting 6 c includes a base metal fitting body 66 and a locking pin 7 a that also serves as an air vent.
The base metal fitting body 66 includes a rectangular base plate 66a and a steel pipe fitting portion 61 'suspended from the base plate 66a.

The steel pipe fitting part 61 ′ has the same structure as the steel pipe fitting part 61 of the single pipe joint 6a except that the cylindrical part 61f having the same outer diameter as the locking hook part 61e is provided above the locking hook part 61e. It has become.
The locking pin 7 a includes a pin body 73, a branch joint 74, and two pipe joints 5.

That is, the pin main body 73 includes a cylindrical hollow portion 73a, and a communication hole 73b communicating with the cylindrical hollow portion 64 is formed at a position facing the cylindrical hollow portion 64 of the steel pipe fitting portion 61 ′ on the wall surface. The locking pin 7 is the same except that a screw 73c is provided on the peripheral surface on the opening end side of the cylindrical hollow portion 73a and the end portion on the branch joint 74 side gradually increases in diameter toward the screw 73c. This has the same structure as the insertion locking portion 71 of FIG.
The branch joint 74 includes three screw holes 74a to 74c communicating with each other, the screw 73c of the pin main body 73 is screwed into one screw hole 74a, and the screw tube portion of the pipe joint 5 is fitted to the other screw holes 74b and 74c. 51 is screwed together.

  In the fixed base metal fitting 6c, first, the lower end surface of the lowermost building land 41 hits the upper surface of the floor plate 66a, and the locking pin insertion hole 42 of the building land 41 and the locking pin insertion of the steel pipe fitting portion 61 ′ are inserted. After fitting the steel pipe fitting portion 61 ′ to the building site 41 so as to match the hole 62, the pin main body 73 is locked until the expanded portion of the pin main body 73 hits the outer wall surface of the building land 41. In the same manner as the pin 7, the building block 41 is inserted from the side of one locking pin insertion hole 42 toward the other locking pin insertion hole 42 via the locking pin insertion holes 62, 62, and then the other locking pin. The locking lever 72 that has come out from the pin insertion hole 42 is pulled in the axial direction of the long hole 72a until the notch portion is disengaged from the tapered surface 71c, and the locking lever 72 is rotated. It is locked to the outer wall surface of the building 41.

  In this steel pipe scaffold B, the column part 4a of the hook portion shown in FIG. 10 connects the upper and lower building sites 41 to each other through the single tube joint 6a, and the lowermost building site 41 is fixed to the fixed base. Since the steel pipe scaffolding plug 6b is attached to the upper end of the uppermost building land 41 while being supported by the metal fitting 6c, for example, as shown in FIG. A plug provided at the tip of the air hose H1 from the air compressor AC is fitted into the socket 52 of one pipe joint 5 of 6c, and the other pipe joint 5 of the fixed base metal fitting 6c of the key post 4a is fitted. A plug provided at one end of the connecting air hose H2 is fitted into the socket 52, and the other end of the connecting air hose H2 is connected to the socket 52 of one pipe joint 5 of the fixed base metal fitting 6c of the pillar 4a. Establishment In the state that the fitted plug, compressed air is supplied to the air compressor AC, compressed air is filled in the column portion 4a of the mosquito-click.

Then, as shown in FIG. 10, one of the pipe joints 5 in the vicinity of the work area of the column part 4a of the hook portion and the air distributor 54 are connected by an air hose H3, and the air moving tool 55 is By connecting to the distributor 54, the work in the work area can be easily performed.
Further, when moving to the next work area, the connection between the pipe joint 5 and the air distributor 54 is released, the air distributor 54 and the air moving tool 55 are carried to the next work area, and the pipe joint near the work area. 5 and the air distributor 54 may be connected again by the air hose H3.

Further, when working in a plurality of work areas at the same time, each pneumatic tool 55 may be connected to the pipe joint 5 in the vicinity of each work area via the air distributor 54.
Note that the pneumatic tool 55 may be directly connected to the pipe joint 5 via the air hose H3 instead of the air distributor 54.

16 to 18 show a third embodiment of the steel pipe scaffold according to the present invention.
As shown in FIGS. 16 to 18, this steel pipe scaffold C includes a plurality of pillars, in which some pillars 8 a are constructed by 81, 82 and a connection air hose H <b> 4, which will be described in detail below, a fixed base A metal fitting 83 and a conventional single pipe joint 87 are formed.

That is, the building site 81 is arranged at the lowermost end of the column portion 8a, and the inside is partitioned by the airtight partition wall 81a on the upper end side.
And two elbow type pipe joint mounting nozzles 81b are connected with a 90 ° angle shift in the circumferential direction of the building 81 slightly below the airtight partition wall 81a.

In addition, two short pipe fitting mounting nozzles 81c are connected to the lower end portion of the building 81 by welding with an angle shifted by 180 ° in the circumferential direction of the building 81.
The elbow type pipe fitting mounting nozzle 81b and the short pipe type pipe fitting mounting nozzle 81c are connected to the pipe fitting 5 similar to the above at their tips.

On the other hand, the interior of the building 82 is partitioned by an airtight partition wall 82a at the upper end portion and the lower end portion, respectively, and two elbow types are provided slightly above the lower airtight partition wall 82a and slightly below the upper airtight partition wall 82a. The pipe joint mounting nozzle 82b is connected by welding with an angle shifted by 90 ° in the circumferential direction of the building 82.
The elbow-type pipe joint mounting nozzle 82b is also connected to the pipe joint 5 similar to the above at the tip thereof.

As shown in FIG. 18, a fixed base metal fitting 83 as a steel pipe scaffolding base metal fitting of the present invention comprises a steel pipe fitting portion 84 and a floor plate 85, and a cylindrical hollow portion 84g provided in the steel pipe fitting portion 84. Is provided for “thief stealing” to reduce the weight of the fixed base metal fitting 83, and does not serve as a compressed air passage, and is provided with a locking pin insertion hole 84a provided in the steel pipe fitting portion 84. The structure is the same as that of the base metal fitting body 66 except that the O-ring is not provided on the inner surface. In FIG. 18, 84b is a main body portion, 84c is an O-ring as a seal, 84d is an engaging recess, 84e is a locking collar portion, and 84f is a cylindrical portion.
The connecting air hose H4 includes plugs P that fit into the sockets 52 of the pipe joint 5 at both ends thereof.

The column portion 8a connects the building site 81 (82) and the building site 82 in the vertical direction using a conventional single pipe joint 87, and the steel pipe fitting of the fixed base metal fitting 83 to the lowermost building site 81. It is formed by fitting the joint portion 84. The building 81 is held in an airtight state by an O-ring 84c of the steel pipe fitting portion 84 and an airtight partition wall 81a, and the building site 82 is held in an airtight state between the airtight partition walls 82a by upper and lower airtight partition walls 82a. Therefore, by connecting the pipe joint 5 of the lower building 81 (82) and the pipe joint 5 of the upper building 82 via the air hose H4, the building 81 (82) and the building The ground 82 is in a communicating state and an airtight state is maintained.
Although not shown in the figure, if a plug P of an air hose from the air compressor AC is connected to the pipe joint 5 connected to the short pipe type fitting mounting nozzle 81c of the building 81, the inside of the column portion 8a. Can be filled with compressed air.

FIG. 19 shows a fourth embodiment of the steel pipe scaffold according to the present invention.
As shown in FIG. 19, the steel pipe scaffolding D includes a horizontal member 92 in which leg pillars 91 (only one side is shown in the figure) formed by steel pipes constituting the building frame 9 connect the both leg pillars 91. And the upper and lower pedestals 91 on both sides of the upper and lower building frames 9 are connected as steel pipe scaffolding joints having the same shape as the single pipe joint 6a shown in FIG. A steel pipe scaffolding plug 95 similar to the steel pipe scaffolding plug 6b shown in FIG. 13 is attached to the upper end of the uppermost leg column 91. Further, the lowermost pedestal 91 is received at its lower end by a jack-type base fitting 96 as a steel pipe scaffolding base fitting.
That is, in the jack-type base metal fitting 96, the steel pipe fitting portion 97 has the same shape as the steel pipe fitting portion 84 of the fixed base metal fitting shown in FIG. 18, and the pipe joint 5 is not mounted. Except that the fitting portion 97 is fixed to the base plate 98 via a solid screw rod 99, it is the same as the jack-type base metal fitting 2b.

  According to this steel pipe scaffold D, since the pillars 91 on both sides are in communication with each other via the horizontal member 92 and the stiffener 93, one pillar part formed by the upper and lower building frames 9 is used. If an air hose (not shown) from an air compressor is connected to one of the pipe joints 5a, the other pillar portion is interposed via the horizontal member 92 and the stiffener 93 as the compressed air is indicated by an arrow. (Not shown).

  The present invention is not limited to the above embodiment. For example, in the steel pipe scaffold described above, compressed air is supplied only to the pillars of A to C or C. However, a structure may be adopted in which compressed air is supplied to all the pillars. Further, the handrail pillar may be connected to the leg pillar or the building site via a leg pillar joint or a single pipe joint, and compressed air may be supplied to the handrail pillar.

In the above embodiment, the socket is provided with a valve body that is opened when the plug is attached and is closed when the plug is not attached. However, a valve body that can be operated manually regardless of whether the plug is attached or not is provided. Alternatively, a cap that can be detachably attached to the tip of the air vent and that can be hermetically closed may be provided, and the cap may be removed when the air hose is attached.
Furthermore, in the above embodiment, the plug is provided on the air hose side and the socket is provided on the column side, but the reverse is also possible.

The 1st Embodiment of the steel pipe scaffold concerning this invention is represented, The figure (a) is a front view of a steel pipe scaffold, The figure (b) is the XX sectional drawing of the figure (a). FIG. 2 is a partially cutaway sectional view of a column part of the steel pipe scaffold shown in FIG. It is sectional drawing of the connection state of the pedestal joint which is a joint for steel pipe scaffolds of this invention used for the steel pipe scaffold of FIG. It is sectional drawing explaining the fitting method of the steel pipe fitting part to the pedestal of FIG. 2, Comprising: The figure (a) shows the state after fitting, and the figure (b) shows the state after fitting. It is sectional drawing of the pedestal support state of the jack type | mold base metal fitting which is the base metal fitting for steel pipe scaffolds of this invention used for the steel pipe scaffold of FIG. It is a front view of the mounting part of the stopper for steel pipe scaffolds of this invention used for the steel pipe scaffold of FIG. FIG. 7 is a sectional view taken along line VV in FIG. It is sectional drawing of the connection state of the other examples of the pedestal joint used for the steel pipe scaffold of FIG. It is sectional drawing of the connection state of the other examples of the pedestal joint used for the steel pipe scaffold of FIG. 2nd Embodiment of the steel pipe scaffold concerning this invention is represented, The figure (a) is a front view of a steel pipe scaffold, The figure (b) is the YY sectional view taken on the line of the figure (a). It is a partially notched sectional view of the column part of the steel pipe scaffold of FIG. It is an expanded sectional view of the connection part by the single pipe joint of the pillar part of FIG. It is an expanded sectional view of the mounting part of the stopper for steel pipe scaffolds of the pillar part of FIG. It is sectional drawing of the support part by the fixed type base metal fitting of the pillar part of FIG. It is the SS sectional view taken on the line of FIG. It is a principal part sectional view of the pillar part showing the 3rd embodiment of the steel pipe scaffold concerning the present invention. It is an expanded sectional view of the connection part of the building area of a pillar part of FIG. 16, and a building area. It is an expanded sectional view of the support part by the fixed type base metal fitting of the pillar part of FIG. FIG. 7 is a cross-sectional view of a main part of a column portion showing a fourth embodiment of a steel pipe scaffold according to the present invention. An example of a conventional steel pipe scaffold is shown, in which (a) is a front view of the steel pipe scaffold, and (b) is a cross-sectional view taken along the line ZZ of (a).

Explanation of symbols

A, B, C, D Steel pipe scaffolds H1, H2, H3, H4 Air hose P Plug AC Air compressor (compressed air supply means)
2a, 3a, 3b, 94 Pole column joint (joint for steel pipe scaffolding)
2b, 96 Jack-type base bracket (Base bracket for steel pipe scaffolding)
2c, 6b, 95 Steel pipe scaffold plugs 4a, 4b, 9a, 10a, 10b Column 5 Pipe joint (air vent)
6a, 87 Single pipe joint 7a Locking pin (air vent)
11 pedestal (steel pipe)
22, 30, 31, 61, 61 ', 84 Steel pipe fitting portions 22b, 61b, 62a, 84c O-ring (seal)
23, 25a, 28c, 64, 73a Cylindrical hollow portion 30b, 31b Seal 41, 81, 82 Building (steel pipe)
52 Socket 55 Pneumatic tool 83 Fixed base bracket (Steel bracket base bracket)

Claims (13)

In steel pipe scaffolding provided in a construction site comprising a plurality of column parts formed by connecting steel pipes up and down, and having a plurality of work areas in the vertical direction,
The at least one column portion is formed so that at least some of the vertically connected steel pipes communicate with each other and the inside of the communicated steel pipes is held in an airtight state, A steel pipe scaffold characterized by having air vents that can communicate with a steel pipe in an airtight state and that can be opened and closed at a plurality of locations in the vertical direction of the column portion.   At least the tip of the air vent is detachable from the plug or socket provided at the tip of the air hose, and is opened when the plug or socket is attached to bring the steel hose into communication with the air hose. The steel pipe scaffold according to claim 1, wherein the steel pipe scaffold is formed by a socket or a plug provided with a valve body that closes an air vent in an airtight state when the socket is not attached.   The steel pipe scaffold according to claim 1 or 2, wherein an air vent is provided at least for each work area.   Assembling the steel pipe scaffold according to claim 1 or claim 2 at the construction site, connecting an air hose from the compressed air supply means to any air vent of the column, and supplying compressed air into the column, A construction method for a building, characterized in that an air vent near the work area is connected to an air moving tool and is constructed using the air moving tool. Steel pipe fitting parts at both ends, one steel pipe fitting part is fitted to the pipe end of the steel pipe constituting the steel pipe scaffold, and the other steel pipe fitting part is the pipe end of the other steel pipe constituting the steel pipe scaffold In steel pipe scaffolding joints that are connected to each other and connect steel pipes,
It has a cylindrical hollow part with openings at both ends that penetrate between both steel pipe fitting parts, and both steel pipe fitting parts are pressed against the inner surface of the steel pipe in a fitted state to the steel pipe, and have a seal that hermetically isolates the inside and outside of the steel pipe A joint for steel pipe scaffolds characterized by   The joint for steel pipe scaffolds according to claim 5, further comprising an air vent that communicates with the cylindrical hollow part and can be connected from the outside in a state where both the steel pipe fitting parts are fitted with the steel pipes.   At least the tip of the air vent is detachable from the plug or socket provided at the tip of the air hose, and is opened when the plug or socket is attached to bring the steel hose into communication with the air hose. The joint for steel pipe scaffolding of Claim 6 formed with the socket or plug provided with the valve body which closes an air vent to an airtight state in the non-mounting state of a socket. In a steel pipe scaffolding base bracket having a floor plate and a steel pipe fitting portion fitted to a pipe end of a steel pipe erected on the floor plate,
The base fitting for a steel pipe scaffold, wherein the steel pipe fitting portion is provided with a seal that is pressed against the inner surface of the steel pipe in a fitted state with the steel pipe and isolates the inside and outside of the steel pipe in an airtight manner.   A cylindrical hollow portion having a bottomed cylindrical shape that penetrates the inside of the steel pipe fitting portion and is open at the distal end side of the steel pipe fitting portion, and communicates with the cylindrical hollow portion, and the steel pipe fitting portion is fitted with the steel pipe. The base metal fitting for steel pipe scaffolding according to claim 8 provided with an air vent which can be connected from the outside in the combined state.   At least the tip of the air vent is detachable from the plug or socket provided at the tip of the air hose, and is opened when the plug or socket is attached to bring the steel hose into communication with the air hose. The steel pipe scaffolding base metal fitting according to claim 9, which is formed by a socket or a plug provided with a valve body that closes the air vent in an airtight state when the socket is not attached.   It has a steel pipe fitting part fitted to the pipe end of the steel pipe constituting the steel pipe scaffold, and this steel pipe fitting part is pressed against the inner surface of the steel pipe in a fitted state to the steel pipe and seals the inside and outside of the steel pipe in an airtight manner. A steel pipe scaffolding plug characterized by comprising:   A cylindrical hollow portion having a bottomed cylindrical shape that penetrates the inside of the steel pipe fitting portion and is open at the distal end side of the steel pipe fitting portion, and communicates with the cylindrical hollow portion, and the steel pipe fitting portion is fitted with the steel pipe. The steel pipe scaffolding plug according to claim 11, further comprising an air vent that can be connected from the outside in a combined state.   At least the tip of the air vent is detachable from the plug or socket provided at the tip of the air hose, and is opened when the plug or socket is attached to bring the steel hose into communication with the air hose. The steel pipe scaffolding plug according to claim 12, which is formed by a socket or a plug provided with a valve body that closes the air vent in an airtight state when the socket is not attached.

Images