JPH11229621A - Scaffolding post equipped with joint metal fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a scaffold usable repeatedly by using a lightweight aluminum extrusion molding for a post. SOLUTION: An auxiliary metal fixture 30 having the same size as that of a circumferential inside 33 and a flat inside 34 is fitted into a post 10 having a non-circular section consisting of a circumference section 11 and a flat section 12, and the auxiliary metal fixture 30 is fixed to the post 10 with rivets 36 and bolts. Then, a joint metal fixture 20 and an upper auxiliary metal fixture 30 are fitted into the post 10, and the upper auxiliary metal fixture 30 is fixed to the post 10. By the constitution, since the joint metal fixture 20 is held between auxiliary metal fixtures 30 and 30 from the vertical direction by bringing the internal circumference thereof into with the side of the post 10, it is stably held in a mounting position. Horizontal members are mounted by means of joint holes 22, and a work scaffolding is constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support for constructing a scaffold used in a construction site such as a house building and a painting.

[0002]

2. Description of the Related Art At a construction site, a horizontal stay is connected to an iron column horizontally or diagonally to construct a working scaffold. Conventionally, various methods have been proposed for connecting the column and the horizontal stay. For example, 3-149
In Japanese Patent Publication No. 78, a connecting portion of a horizontal stay is fitted to a flange fixed to a column, and a wedge penetrating the flange and the connecting portion is inserted. In Japanese Utility Model Publication No. 7-55558, a horizontal stay having U-shaped joint pieces fixed to both ends is prepared, and a joint plate fixed to a support and a U-shaped joint piece are overlapped and wedge-stopped to form a U-shaped joint. A connection structure in which a part of a joint piece abuts on a side surface of a column is introduced.

[0003]

The material used for the scaffold is dismantled after the completion of the construction and reused at the next construction site. Therefore, a connecting structure capable of connecting and detaching to and from a horizontal stay is desired, and a joint plate is welded to a column as disclosed in Japanese Patent Publication No. 3-14978 and Japanese Utility Model Publication No. 7-51558. Further, in consideration of transportation and handling, it is desired to use a lightweight member. An extruded aluminum alloy material (hereinafter, simply referred to as an extruded aluminum material) is an example of a material having excellent lightness and withstanding a load applied at a construction site or the like. However, when extruded aluminum members are used for the pillars, which are the main components of the scaffold, if the joint plate is fixed to the pillars by welding, the strength of the pillars decreases due to heat input during welding, and the required strength cannot be secured. Therefore, in order to use an extruded aluminum material, a connection structure different from a conventional iron column is required. The present invention has been devised to meet such a demand, and by using a column made of an extruded aluminum material having a flat portion to enable a stable mounting of a connecting bracket, welding or the like is performed. It is an object of the present invention to construct a scaffold that is lightweight and excellent in strength without the risk of material deterioration or deformation and to enable reuse of materials.

[0004]

According to the present invention, there is provided a work scaffolding support having a noncircular cross-section in which a plurality of longitudinally extending flat portions are formed at equal intervals in a circumferential direction. An extruded column, a ring-shaped main body having an opening into which the post is fitted at the center, and a plurality of connection holes provided in the ring-shaped main body, including a flat portion. An auxiliary fitting having an inner surface corresponding to the non-circular cross section of the support, and having a flat portion formed with a through-hole for mounting fitting insertion, and an auxiliary fixed to the support on the upper and lower sides in the longitudinal direction of the support. The ring-shaped connection fitting is clamped by the fitting. The connecting metal fitting may be a ring-shaped divided connecting metal fitting that comes into contact with the flat portion of the column. Further, the auxiliary fitting may be formed integrally with the ring-shaped connecting fitting. In the case of the split connecting fitting, it is necessary to integrate the auxiliary fitting with the auxiliary fitting.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A pillar 10 according to the present invention is made by cutting an extruded aluminum material into a predetermined length. Prop 10
Is a non-circular shape having a plurality of flat portions 12 provided at equal intervals between circumferential portions 11 as shown in FIG. 1 (a). The width of the flat portion 12 in the circumferential direction is set to a width in which the connecting fitting 20 and the auxiliary fitting 30 are attached in a stable state. In the flat portion 12, female screw holes to which bolts, rivets and the like for fixing the auxiliary metal fittings 30 are fixed, or insertion holes 13 to be inserted are provided at predetermined intervals along the longitudinal direction of the column 10. . In addition, instead of a normal bolt,
A drilling tapping screw may be used. In this case, the auxiliary fitting 30 can be fixed to the flat portion 12 of the support column 10 without forming the insertion hole 13 in the support column 10 in advance.

[0006] The connecting bracket 20 has a ring shape in which an opening 21 into which the support 10 is inserted is formed at the center.
A plurality of connection holes 22 are formed at equal intervals in a plane portion of the ring-shaped main body. The connection hole 22 is used for engaging the transverse member according to a conventional method when constructing the work scaffolding, or for fixing with a bolt or the like. It is preferable that the opening 21 be defined by a circumferential inner surface 23 and a flat inner surface 24 having substantially the same size as the outer surface of the column 10 in order to prevent rotation of the column 10.

An opening 31 into which the column 10 is inserted is formed in the center of the auxiliary fitting 30 as well. The inner side surface of the auxiliary fitting 30 facing the opening 31 is constituted by a circumferential inner surface 33 and a flat inner surface 34 corresponding to the outer side surface of the support 10. The outer side surface of the auxiliary fitting 30 may be cylindrical as shown, or may be any of non-circular side surfaces corresponding to the circumferential inner surface 33 and the flat inner surface 34. A plurality of through holes 35 facing the opening 31 from the flat inner surface 34 are formed in the tube wall of the auxiliary fitting 30.

When attaching the connecting fitting 20 to the support 10, the lower auxiliary fitting 30 is first fitted into the support 10 and the auxiliary support 30 is fixed to the support 10 at a predetermined position. In the case of FIG. 1, a blind rivet 36 is used for fixing the auxiliary fitting 30. The blind rivet 36 inserted into the through hole 35 of the auxiliary fitting 30 is used to
Is pulled out, the tip 3 of the blind rivet 36 is moved by the mandrel tip 37 a disposed inside the support 10.
6a is expanded to form a swaging portion 38. Caulking part 38
Is pressed against the inner wall surface of the insertion hole 13 (b). As a result, the auxiliary fitting 30 is fixed to the support 10 in a detented state. Next, from the end of the support 10, the connection fitting 2
0 and the upper auxiliary fitting 30 is further inserted. When the upper auxiliary fitting 30 is brought into close contact with the connecting fitting 20 and is fixed to the column 10 in the same manner as the lower auxiliary fitting 30, the connecting fitting 20 is sandwiched between the upper and lower auxiliary fittings 30.
Is fixed to the support 10 (c).

The fixed connecting fitting 20 is fixed to the inner circumferential surface 23.
The flat inner surface 24 abuts on the circumferential portion 11 and the flat portion 12 of the column, and the vertical movement is restrained by the upper and lower auxiliary fittings 30. Therefore, even when a slight load is applied, the scaffold does not move up and down along the column 10 and is used for constructing a stable scaffold. Further, since the connecting fitting 20 is ring-shaped, for example, when a downward force is applied to the connecting fitting 20 on one side in the circumferential direction of the column 10, an upward force is applied on the opposite side. This also
The movement of the connection fitting 20 along the up and down direction of the column 10 is prevented. Further, when the thickness of the connection fitting 20 is increased, the contact area with respect to the support pillar 10 is increased, so that a stronger connection joint is obtained.

The connection fitting 20 fixed to the column 10 is used for fixing a pipe material or the like serving as a horizontal stay. For example, by attaching and fixing a fitting at the end of the pipe to the connecting hole 22 of the connecting fitting 20, the pipe material is attached to the column 10 via the connecting fitting 20, and a working scaffold is constructed. When the work scaffold is dismantled, the work scaffold can be easily dismantled by removing a pipe material or the like that becomes a horizontal stay from the connection hole 22 of the connection fitting 20 according to a conventional method. Further, the pillar 10 is reused at the construction site as in the related art.

As shown in FIG. 2, the number of the flat portions 12 formed on the column 10 is four or more along the circumferential direction as long as a sufficient contact area with the connecting metal member 20 and the auxiliary metal member 30 can be obtained. You can also. According to the shape of the flat portion 12, the connecting fitting 20 and the auxiliary fitting 30 having the circumferential inner surfaces 23, 33 and the flat inner surfaces 24, 34 formed in the same positional relationship are used. In FIG. 2, the auxiliary fitting 30 is fixed to the column 10 using a drilling tapping screw. In this case, the insertion hole 13 is
Need not be formed in advance, and the processing cost is reduced.

Instead of the ring-shaped connection fitting 20 shown in FIG. 1, a connection fitting that is attached to the flat portion 12 of the column 10 may be used as the connection fitting. For example, as shown in FIG. 3, one of the flat portions 12 formed at equal intervals in the circumferential direction of the column 10 is selected, and the divided connecting metal fitting 25 is fixed to the column 10 with bolts 39 (a). .
Since the connecting fitting 25 is a split type, it can be fixed by shifting the height position of the adjacent connecting fittings 25, 25 (b), and can be used for a wide range of applications such as attaching a diagonal brace material to a column outside the horizontal stay. Also available. Since the split-type connecting bracket 25 merely touches a part of the flat portion 12 without surrounding the column 10 in the circumferential direction, the split-type connecting bracket 25 needs to be integrally formed with the fastening portion 26 having the function of the auxiliary fitting 30. is there. In addition, as the ring-shaped connection metal fittings shown in FIGS. 1 and 2, the one in which the auxiliary metal fitting 30 is integrally formed can be used, and similarly, a joint having high connection strength can be obtained. In addition, the ring-shaped connecting bracket 20 (FIG. 1) and the split-type connecting bracket 25 (FIG. 3)
It can be produced by cutting an extruded aluminum material having a predetermined cross-sectional shape into a predetermined length. For example, an extruded aluminum member having a cross-sectional shape hatched in FIG.

[0013]

As described above, the working scaffolding support of the present invention employs a method of fixing the connecting member for attaching the horizontal member to the support by mechanical fixing means. Without it, it is used as a scaffolding material that can be used repeatedly. In addition, since the connecting fittings are mechanically connected, there is no reduction in material strength, which is a problem in the case of being affected by heat during welding, and a work scaffold utilizing the lightness, durability, and strength of the extruded aluminum material. Is constructed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view (a), a plan sectional view (b), and a side view (c) of a work scaffolding support provided with a ring-shaped connecting fitting.

FIG. 2 is a plan sectional view (a) and a side view (b) of a work scaffolding support having flat portions in four directions.

FIG. 3 is a plan sectional view (a) and a side view (b) of a work scaffolding post to which a split-type connecting bracket is attached.

[Explanation of symbols]

10: Support 11: Circumference 12: Flat 1
3: Insertion hole 20: Connection fitting 21: Opening 22: Connection hole
23: Circumferential inner surface 24: Flat inner surface 25: Divided connecting metal fitting 26: Fastening part 30: Auxiliary metal fitting 31: Opening 33: Circumferential inner surface
34: Flat inner surface 35: Through hole 36: Blind rivet 37:
Nut 38: Washer 39: Bolt

Claims (5)

[Claims] 1. A pillar made of an extruded aluminum member having a non-circular cross section in which a plurality of flat portions extending in a longitudinal direction are formed at equal intervals in a circumferential direction, and an opening into which the pillar is fitted is formed in the center. It has a ring-shaped main body and has a ring-shaped connection fitting with a plurality of connection holes provided in the ring-shaped main body, and an inner surface corresponding to the non-circular cross section of the support including the flat part, and for inserting the mounting fitting into the flat part And a connecting metal fitting, wherein the ring-shaped connecting metal is clamped by the auxiliary metal fittings fixed to the column on the upper side and the lower side in the longitudinal direction of the column. Post for work scaffold. 2. The work scaffolding post according to claim 1, wherein the auxiliary fitting is integrated with the ring-shaped connecting fitting. 3. The work scaffold post according to claim 1, wherein the connecting fitting and the auxiliary fitting are formed by cutting an extruded aluminum material. 4. A connecting hole having a pillar made of an extruded aluminum member having a non-circular cross-section in which a plurality of flat parts are formed at equal intervals in a circumferential direction, and a side surface in surface contact with the flat part of the pillar. The split-type connecting metal fitting, and the auxiliary metal fitting that is formed integrally with the split-type connecting metal fitting, through which the split-type connecting metal fitting is sandwiched on the upper side and the lower side with respect to the longitudinal direction of the support column, and a through-hole for mounting bracket insertion is formed. A work scaffolding support provided with a connecting fitting, comprising: 5. The support for a working scaffold according to claim 4, wherein the integrally formed split-type connecting metal fitting and auxiliary metal fitting are formed by cutting an extruded aluminum material.