JP2538796Y2 - Scaffolding frame 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 scaffolding frame fitting for connecting a lower scaffolding pipe and an upper scaffolding pipe when assembling a scaffolding frame constituted by pipes.

[0002]

2. Description of the Related Art Conventionally, there is a connecting bracket of this type shown in FIGS.

This device has a connecting pipe 1 having a locking portion 2 in the center, insertion portions 3 and 4 on both sides thereof, a short rod portion 6 at one end, and a shaft center of the connecting pipe 1 at the other end. L-shaped hook rod 5 having a long rod portion 7 having a length penetrating in a direction perpendicular to the direction
Consists of In the central locking portion 2 of the connecting pipe 1,
Through holes 8 and 9 are formed on opposing wall surfaces at positions orthogonal to the axis. The long rod portion 7 of the L-shaped hook 5 is slidably inserted into the through holes 8 and 9.
A through hole 10 into which the short rod portion 6 of the L-shaped hook 5 is inserted is formed in the wall surface of the insertion portion 3 above the connecting pipe 1. A spring 11 is mounted on the long rod portion 7 of the hook 5 inserted into the connection pipe 1, and the spring 11 urges the hook 5 toward the connection pipe 1.

When assembling the scaffold frame, first, the insertion portion 4 below the connecting pipe 1 is inserted into the upper end of the lower scaffolding pipe 15, and a through hole formed in the insertion portion 4 below the connecting pipe 1. The connecting pipe 1 is added to the upper end of the lower scaffold pipe 15 by inserting a locking pin (not shown) into the upper end of the lower scaffold pipe A by aligning the through hole formed in the upper end of the lower scaffold pipe A with 12. Next, the L-shaped hook 5 is pulled to pull out the short rod 6 from the through-hole 10 of the insertion section 3 of the connecting pipe 1, and the short rod 6 of the hook 5 is rotated upward while the short rod 6 is rotated downward. The insertion portion 3 above the connecting pipe 1 is inserted into the lower end of the scaffold pipe 16, and the position of the through hole 17 formed at the lower end of the upper scaffold pipe 16 and the position of the through hole 10 formed in the inserting portion 3 of the connecting pipe 1 are aligned. After that, the short rod 6 of the hook 5 is rotated upward,
To pull the short rod 6 into the through hole 17 of the upper scaffold pipe 16.
And into the through hole 10 of the insertion portion 3 of the connecting pipe 1.

[0005] In this way, the lower scaffold pipe 15 and the upper scaffold pipe 16 are connected via the connecting pipe 1.

[0006]

In the scaffolding frame fitting having the above structure, the hook 5 is urged toward the long rod 7 of the hook 5 in the connecting pipe 1 toward the axis of the connecting pipe 1. A spring 11 is mounted, and a bulging portion 13 for retaining is formed at the tip of the long rod portion 7 of the hook rod 5 by pressing. Therefore, in order to incorporate the hook 5 and the spring 11 into the connecting pipe 1, of the through holes 8 and 9 of the connecting pipe 1 into which the long rod 7 of the hook 5 is inserted, the through hole on the insertion side of the long rod 7 is inserted. Hole 9
Is formed larger than the other through hole 8, and after inserting the long rod 7 and the spring 11 into the connecting pipe 1 from the side of the large through hole 9,
The bush 14 inserted into the hook 5 is fitted to the inner surface of the large through hole 9, and the connecting pipe 1 around the bush 14 is caulked to fix the bush 14 to the connecting pipe 1.

However, in the above structure, the inner surface of the through hole 9 of the connecting pipe 1 into which the bush 14 is to be fitted must be precisely finished in advance by reaming, which causes a problem that the processing cost is high.

Further, the work of caulking the periphery of the through hole 9 of the connecting pipe 1 for fixing the bush 14 to the through hole 9 of the connecting pipe 1 is very difficult, and therefore, a caulking failure easily occurs. If the bush 14 is not properly caulked, the bush 14 may come off and the hook 5 may fall off.

Accordingly, the present invention is to provide a scaffolding frame fitting having a structure capable of easily and reliably mounting the connecting pipe and the L-shaped hook rod.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problem, the present invention is directed to a locking portion 22 at the center of a connecting pipe 21.
The size of the through hole 28 in which the tip side of the long rod portion 27 of the L-shaped hook rod 25 is formed to be larger than the other through hole 29 among the opposed through holes 28 and 29 formed in the L-shape. Since the tip of the long rod 27 of the hook 25 is covered with the retaining cap 32 and secured, and the spring 31 attached to the long rod 27 of the L-shaped hook 25 is locked by the inner end of the cap 32. is there.

[0011]

The work of securing the tip of the long rod portion 27 of the L-shaped hook rod 25 with the retaining cap 32 can be easily and reliably performed by caulking or the like. The attachment of the pipe 21 and the L-shaped hook 25 can be performed easily and reliably.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the scaffolding frame connecting bracket according to the present invention will be described below.

The scaffolding frame fitting according to the present invention has a locking portion 22 at the center, a connecting pipe 21 having insertion portions 23 and 24 on both sides thereof, a short rod portion 26 at one end, and a connecting portion at the other end. It consists of a combination with an L-shaped hook rod 25 having a long rod portion 27 of a length penetrating in a direction perpendicular to the axis of the pipe 21.

The locking portion 22 at the center of the connecting pipe 21
Is formed by placing a separate pipe on the connecting pipe 21 and caulking and fixing both. Through holes 28 and 29 into which the long rod portion 27 of the hook 25 is slidably inserted are formed in the locking portion 22 on the opposite wall surface at a position orthogonal to the axis of the connecting pipe 21. . One of the through holes 28 and 29 is formed to have substantially the same size as the long rod portion 27 of the hook 25. Connecting pipe 2
In the upper insertion portion 23, a through hole 30 into which the short rod portion 26 of the hook rod 25 is inserted is formed at a position above the smaller one of the through holes 28, 29. .

The long rod portion 27 of the L-shaped hook 25 is inserted through the smaller one of the through holes 28, 29 of the connecting pipe 21, and penetrates through the connecting pipe 21. The tip portion protrudes from the through hole 28. A spring 31 is fitted into the long rod portion 27 of the hook rod 25 from the larger through hole 28, and a retaining cap for locking the spring 31 is provided at the tip of the long rod portion 27 protruding from the through hole 28. 32 is fixed by caulking. Reference numeral 34 indicates the caulking portion. For fixing the long rod 27 and the retaining cap 32, a knurled part is formed at the tip of the long rod 27,
The knurl portion may be firmly fitted into the retaining cap 32.

The insertion portion 24 below the connecting pipe 21
, A through hole 33 corresponding to the locking hole formed at the upper end of the lower scaffold pipe A is formed at an opposing position so as to be orthogonal to the axis.

[0017]

As described above, according to the present invention, the L-shaped hook can be easily and reliably fixed to the connecting pipe, so that the L-shaped hook can be safely removed without danger of falling off. The frame connection fitting can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a scaffolding frame connecting bracket according to the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the above.

FIG. 3 is a diagram showing a use state of the above.

FIG. 4 is an exploded perspective view of a conventional example.

FIG. 5 is a longitudinal sectional view showing a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Connecting pipe 22 Locking part 23, 24 Insertion part 25 Hook rod 26 Short rod part 27 Long rod part 28, 29, 30, 33 Through-hole 31 Spring 32 Cap

Claims (1)

(57) [Scope of request for utility model registration] 1. An engaging portion 22 in the center and insertion portions 2 on both sides thereof.
3 and 24, and a short rod 26 at one end.
And an L-shaped hook rod 25 having a long rod portion 27 having a length penetrating in the direction perpendicular to the axis of the connecting pipe 21 at the other end. Part 2
A through hole 28 is formed in the opposing wall surface at a position orthogonal to the axis 2
An L-shaped hook 25 is formed in the through holes 28 and 29.
Of the connecting pipe 21
The short rod portion 26 of the L-shaped hook 25 is inserted into one of the insertion portions 23.
In the scaffolding frame fitting in which a through hole 30 for inserting the hook rod 25 and a spring 31 for urging the hook rod 25 and the connecting pipe 21 side are attached to the long rod portion 27 of the L-shaped hook rod 25, Opposing through hole 2 formed in the central locking portion 22
8 and 29, the size of the through hole 28 in which the tip end of the long rod portion 27 of the L-shaped hook rod 25 is located is formed larger than the other through hole 29, and the long rod portion of the L-shaped hook rod 25 is formed. 27 is secured with a cap 32 over the tip of the L-shaped hook rod 2.
The spring 31 attached to the long rod 27 of the fifth
A scaffolding frame coupling fitting locked by an inner end of the scaffold.