JP2931758B2 - Connecting metal fitting and frame scaffolding member having the connecting metal fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting member used in a scaffold and a member for a scaffold having the connecting member.

[0002]

2. Description of the Related Art In general, at a construction site or the like, in order to smoothly work at a high place, for example, a scaffolding support is erected around a building, and a tread or a handrail is provided between the scaffolding supports. To build a scaffold.

[0003] Conventionally, there is a connecting bracket as shown in FIG. 10 used for connecting a handrail or the like to a scaffold support. That is, the connecting fitting 25 is attached to the cylindrical mounting portion 26.
And the mounting portion 26 is formed by a member different from the mounting portion 26.
Wedge-shaped locking portion 27 joined to the tip end surface by welding
And, it consists of. An attachment portion 26 of the connection fitting 25 is fitted and fixed to an end of the pipe member 28.
By inserting the locking portion 27 into a locking hole 30 formed around the scaffolding post 29, the pipe member 28 is connected to the scaffolding post 29.

[0004]

However, the connecting bracket 25 is formed by welding a mounting portion 26 and a locking portion 27 which are separate members. Therefore, in manufacturing the connection metal fitting 25, a process of manufacturing the mounting portion 26 and the locking portion 27, respectively, and a process of manufacturing the mounting portion 26 and the locking portion 27
Therefore, a step of welding is required, and the number of manufacturing steps is increased, resulting in an increase in cost. With the increase in the cost of the connecting fitting 25, the manufacturing cost of the framework scaffold member to which the fitting 25 is mounted has also increased. Further, the strength of the connecting fitting 25 was also low.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems existing in the prior art described above, and has as its object to reduce the number of steps, to manufacture it inexpensively, and to have high strength. The object of the present invention is to provide a framework scaffolding member having:

[0006]

To achieve the above object, according to the first aspect of the present invention, the mounting portion and the locking portion are integrally formed.
And locks with the mounting part of the connecting bracket along the peripheral surface of the scaffolding post
Position the mounting part in the longitudinal direction of the locking part so that the part
To form a pair of arcuate concave portions
Forming a recess aligned in a straight line with the pair of arc-shaped recesses;
Further, the mounting portion is located at a position orthogonal to the pair of arc-shaped concave portions.
This is a connecting fitting provided with a pair of arcuate concave portions .

[0007] In the second aspect of the present invention, the attachment portion has a shape into which an end of a scaffold tube is inserted. Claim 3
According to the invention, a frame scaffolding member is provided with the connecting fitting according to claim 1 or 2 attached thereto.

[0008]

According to the first aspect of the present invention, in the connection fitting, the mounting portion and the locking portion are integrally formed. Therefore,
Conventionally, the steps of manufacturing the mounting portion and the locking portion and the process of welding the mounting portion and the locking portion are combined into one, thereby reducing the number of processes. Therefore, it is possible to reduce the manufacturing cost of the connecting fitting and provide it at low cost. Further, the strength is not partially reduced.

According to the second aspect of the present invention, a scaffold tube is inserted into the mounting portion. According to the third aspect of the present invention, a frame scaffolding member can be provided at low cost by mounting the connecting fitting of the first or second aspect instead of the conventional connecting fitting.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a connecting scaffold according to the present invention.

As shown in FIG. 1 to FIG.
It comprises a cylindrical mounting portion 2 having both ends opened, and a wedge-shaped locking portion 3 which is vertically provided at a tip portion (a lower portion in FIG. 2) of the mounting portion 2. The inner peripheral surface central portion of the mounting portion 2 and the flange 4 is circumferentially provided, the flange 4 that has no donut shape. An arc-shaped concave portion 6 is formed at an edge of the lower portion of the opening 5 in FIG. As shown by 7 in FIG. 2, the bottom surface of the locking portion 3 has a shape in which the central portion is depressed from the distal end portion to the base end portion.
Is continuous with one of the

As shown in FIG. 7, in this embodiment,
The connection fitting 1 is manufactured by die forging, and the mounting part 2 and the locking part 3 are integrally formed. That is, the opposing end faces of the pair of upper and lower mold frames 8 are shown in FIGS.
An upper die 9 and a lower die 10 each having a shape corresponding to the connection fitting 1 shown in FIG. The metal material 100 softened by heating is placed on the lower mold 10, and the same material 100 is pressed by the upper and lower mold frames 8, so that the two molds 9 and 1 are pressed.
The material is filled in the cavity formed by being surrounded by 0, and die forging is performed. Then, the molded product is taken out of the mold frame 8 and subjected to post-processing such as deburring by press molding, so that the connection fitting 1 is obtained.

Next, a description will be given of a frame scaffold member on which the connecting fitting 1 is mounted. As shown in FIG. 5, the handrail 11 as a scaffold member is formed by fixing the connection fittings 1 to both ends of a handrail body 12 made of a straight pipe material. That is, the mounting portion 2 of the connection fitting 1 is moved from the upper opening 13 side to the handrail main body 12.
Are fitted on the outside of both ends of the
Part is inserted. The end surface of the handrail body 12 is a flange
The edge of the opening 13 of the mounting portion 2 and the peripheral surface of the handrail main body 12 are welded in a state of contact with the four side surfaces, and the connecting fittings 1 are fitted and fixed to both ends of the handrail main body 12, respectively. .

Referring to the bracket member 14 as a scaffold member, as shown in FIG. 6, a support frame 16 is fixed to the left side of a bracket body 15 made of a straight pipe by welding. The left side of the bracket member 14 has a substantially horizontal A shape. The connection fittings 1 are fixed to both ends of the bracket body 15 in the same manner as the handrail 11. A curved receiving surface 17 is formed at the lower end of the support frame 16.

Next, a scaffold constructed using the scaffold members 11 and 14 will be described. As shown in FIG.
The scaffold post 18 is supported on the ground and extends vertically upward. This is installed at a plurality of locations at a predetermined pitch, for example, around a building (not shown). On the outer peripheral surface of the scaffolding support 18, a U-shaped holding bracket 19 having an open upper surface is provided around the axis of the scaffolding support 18.
For each °, a total of four protruding parts are provided. A locking hole 20 is formed surrounded by the inner peripheral surface of the holding metal 19 and the outer peripheral surface of the scaffolding column 18. On each of the scaffolding columns 18, a plurality of the holding members 19 are provided at a plurality of locations at regular intervals in groups of four.

The locking portions 3 at both ends of the handrail 11
Are inserted into the locking holes 20 of the corresponding scaffolding posts 18 by driving with a hand hammer or the like, and the handrails 11 are horizontally installed between the adjacent scaffolding posts 18.

The bracket member 14 has one of the locking portions 3 inserted into the locking hole 20, and further has a support frame 16.
By contacting the receiving surface 17 along the peripheral surface of the scaffolding support 18, the scaffolding support 18 is horizontally cantilevered in the direction orthogonal to the direction in which the handrail 11 is installed. Treadboards 21 are provided between the bracket members 14 of the adjacent scaffolding columns 18, respectively.

As shown in FIG. 8, the handrails 11 and the bracket members 14 are alternately provided on the scaffolding columns 18 every other set of holding brackets 19. The handrail 1
When locking the bracket 1 and the bracket member 14 to the scaffolding column 18, the recess 7 formed on the bottom surface of the locking portion 3 and the mounting portion 2
A pair of recesses 6 located in the direction in which the recesses 7 extend
Are respectively abutted along the peripheral surface of the corresponding scaffolding column 18. Although not shown, the pair of concave portions 6 remaining in the mounting portion 2 are, for example, when the locking portion 3 is inserted into a scaffold member extending in a direction orthogonal to the extending direction of the locking portion 3. The recess 6 comes into contact with the peripheral surface of the scaffold member.

As described above, the handrail 11 and the tread plate 2 are provided between the plurality of scaffolding posts 18 erected around the building.
The work scaffold is assembled and erected by performing erection 1 above.

In particular, in this embodiment, the connection fitting 1 is manufactured by die forging, and the mounting portion 2 and the locking portion 3 are integrally formed. Therefore, the number of manufacturing steps can be reduced as compared with the prior art shown in FIG.

When the connecting fitting 1 is fitted into the locking hole 20 by the concave portion 6 of the mounting portion 2 and the concave portion 7 of the locking portion 3, the concave portion 7 and the concave portion 6 become the peripheral surface of the scaffolding column 18. And the backlash of the locking portion is suppressed.

Further, the handrail 11 and the bracket member 14 of this embodiment have the connecting fitting 1 having the above-described configuration at an end.
Therefore, it can be provided at a lower cost as compared with the case where the conventional connection fitting 25 is mounted.

In addition, since the mounting portion 2 and the locking portion 3 are integrated, the connection fitting 1 has high strength. It should be noted that the present invention is not limited to the above embodiment, and can be implemented in the following modes without departing from the spirit of the present invention. (1) In the above-described embodiment, the fitting 1 and the engaging portion 3 are integrally formed by die forging in the connection fitting 1, but this is changed to be integrally formed by, for example, casting, injection molding, or the like. May be. (2) In the above embodiment, the connection fitting 1 is fixed by welding to the ends of the handrail 11 and the bracket member 14, but this is changed and the connection fitting 1 is attached to the handrail 11 and the bracket member 14. Removably attach.
In this case, if the mounting portion 2 is made longer than in the above embodiment,
The member main bodies 12, 15 can be stably held. In this way, for example, when the span of the scaffolding support 18 is to be changed, it can be dealt with simply by replacing the member main bodies 12 and 15 and the connection fitting 1 can be shared. (3) The connecting bracket 1 is welded to the scaffold member body 1 by welding.
Although they are fixed to 2, 15, they may be fixed by bolting or the like. (4) The flange 4 of the connection fitting 1 is deleted so that the connection fitting 1 can be arranged at an arbitrary position in the longitudinal direction of the pipe material. To be configured so as to be perpendicular to the center and have a substantially P-shaped upper surface. That is, for example, it is used when the handrail 11 is locked in a cross shape with the suspended scaffolding column 18. (5) The flange 4 is deleted from the mounting portion 2, and the mounting portion 2 is formed in a closed cylindrical shape. In this case, the back surface of the lid abuts on the end surface of the pipe material. (6) As shown in FIG. 9, the mounting portion 2 is formed as a column having substantially the same diameter as the inner diameter of the pipe material, and is configured to be inserted into the end of the pipe material. In addition, the attachment part 2 is inserted from above in the figure up to the flange indicated by 22, and the flange 22 and the end of the pipe material are joined by welding to form a scaffold member.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (1) The locking portion 3 is vertically provided at the tip of the mounting portion 2, and the end faces of the locking portion 3 and the mounting portion 2 facing the other scaffold member 18 are formed continuously. 2. The connection fitting according to claim 1, wherein the end face has a shape (recess 6, depression 7) along the peripheral surface of the other scaffold member 18. 3.

In this way, the rattling of the locking portion can be suppressed.

[0026]

According to the first and second aspects of the present invention, it is possible to reduce the number of manufacturing steps of the connecting fitting, thereby reducing the manufacturing cost, and to provide the connecting fitting at low cost. In addition, the retaining effect is improved, and a high-strength connection fitting that can be stably held can be obtained.

According to the third aspect of the present invention, a scaffold member can be provided at low cost by mounting the above-mentioned connecting fitting.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is a top view of a connection fitting.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a sectional view taken along line CC in FIG. 1;

FIG. 5 is a front view of a handrail.

FIG. 6 is a front view of a bracket member.

FIG. 7 shows a formwork for forming the connecting fitting by die forging.

FIG. 8 is an exploded perspective view showing a state where a framework scaffold is temporarily provided using a handrail, a bracket member, and the like.

FIG. 9 is a longitudinal sectional view showing another example.

FIG. 10 is a perspective view showing a conventional connection fitting and showing a locked state of a scaffolding member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Connecting bracket, 2 ... Mounting part, 3 ... Locking part, 11 ... Handrail as a scaffolding member, 14 ... Bracket member as a scaffolding member, 18 ... Scaffolding post as a scaffolding member, 20 ...
Lock holes.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 7/22

Claims (3)

(57) [Claims] 1. A connection fitting comprising a mounting portion fixed to an end of a tube for a framed scaffold, and a locking portion protruding from the mounting portion and inserted into a locking hole provided in the framed scaffold. In the above, the mounting portion and the locking portion are integrally formed , and are formed along the peripheral surface of the scaffold support.
So that the mounting part of the connection bracket and the locking part
A pair of arc-shaped concave portions located in the longitudinal direction of the locking portion
And the locking portion is directly connected to the pair of arc-shaped concave portions.
Forming a line-shaped depression, and furthermore, the pair of circles of the mounting portion;
A pair of arc-shaped recesses is also provided at a position orthogonal to the arc-shaped recess.
Girder connection bracket. 2. The connection fitting according to claim 1, wherein the attachment portion has a shape into which an end of a scaffold tube is inserted. 3. A frame scaffold member to which the connection fitting according to claim 1 is mounted.