JPS6246759Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fastening fitting for vertically and horizontally connecting steel pipes used for assembly scaffolding and the like.

Conventional fastening fittings of this type consist of a clamp piece for gripping (clamping) the vertical pipe and a clamp piece for clamping the horizontal pipe, which are placed back to back and integrally connected with screws or bolts. Since it consists of a metal fitting body, it is expensive due to the large number of components and man-hours required to manufacture it, and it also has the disadvantage that the above-mentioned joints are subject to overload and break down in a short period of time.

This idea focuses on the above-mentioned difficulties, minimizes the number of component parts and manufacturing man-hours, and eliminates the need to connect each component with rivets or bolts, thereby creating an inexpensive and strong product. It is an object of the present invention to provide this type of fastening fitting.

An embodiment of this invention will be described below with reference to drawings. Figs. 1a and 1b show the entire fitting 1 of this fastening fitting, in which cuts are provided radially from the four corners of a substantially rectangular metal plate toward the center. By bending the metal plate at right angles into a substantially U-shaped parallel cross section of a substantially triangular plane formed at both ends of each side of the metal plate, each of the U-shaped ear frames 2, 3, 4, and 5 is placed at the center. flat plate part 6
A metal fitting main body 1 is manufactured which is integrally formed so as to sandwich the metal parts in a substantially cross shape in a plan view. The U-shaped ear frames 2 and 4, and 3 and 5, which are located on the same axis while sandwiching the flat plate part 6 of the metal fitting main body 1, each have a U-shaped opening. Insert the other U-shaped ear frame 2 so that it faces upward.
and 3 are bent downward. The reason for this will be explained later, but as shown in FIG. They are located on approximately the same plane. For this reason, when these U-shaped ear frames 2 and 5 are formed from metal plates, they are curved upward and downward from their respective necks 9 and 10, as shown in FIG. 1a. In the figure, reference numeral 23 indicates a reinforcing protrusion that is formed to bulge out at the same time as the metal plate is bent.

As shown in FIG. 2, a pair of U-shaped ear frames 2, 4 and 3, 5 are located on the same axis, respectively.
On the other hand, one of the U-shaped ear frames 3 and 4 has a fastening arm rod 11 which is suitably bent into a substantially U-shaped cross section and has notched U-shaped fastening portions 11' and 12' at the center in the longitudinal direction.
and 12 are pivotally connected by a pivot 13, and fastening bolts 14 and 15 are also pivotally connected to the other U-shaped ear frames 2 and 5 by a pivot 16. In order to widen the tightening rotation range of the fastening bolts 14, 15, as shown in FIGS.
8 is formed.

FIG. 3 shows the state of fastening between the vertical scaffold pipe P1 and the horizontal pipe P2 when assembling the scaffold, and the fitting body 1 is sandwiched between the vertical pipes P1 and the horizontal pipes P2.
A horizontal rod P2 is arranged on the fastening arm rod 11 on one side, a vertical pipe P1 is arranged on the fastening arm rod 12 on the other side, and the fastening bolt 1
4, 15 are fastened. Engagement groove 1 at the tip of arm rod 11, 12
9 and 20 and tightened with the nut 22 via the washer 21 as appropriate. At this time, a feature of this invention is that when the horizontal pipe P2 receives a load in the direction of the arrow A, the first
Since the reinforcing protrusion 23 shown in the figure is in pressure contact with the vertical pipe P1, the load in the direction of the arrow A is directly received by the vertical pipe P1, and the metal fitting body 1, especially both pipes P1,
This unbalanced load is not applied to the flat plate portion 6 that connects P2, and it has sufficient durability against large loads. Moreover, the opening edge 8 of one U-shaped ear frame 5 and the flat plate portion 6 are formed on the same plane so as to uniformly contact the horizontal pipe P2, and the edge of the other U-shaped ear frame 2 7 and the flat plate part 6 (therefore, the reinforcing protrusion 23 which is an extension thereof) are also formed on the same plane so as to uniformly contact the vertical pipe P1, and as a result, both the horizontal and vertical pipes P1, P2 is gripped, so that the metal body 1 is not locally overloaded.

4 to 6 show the folded state of the fastener when it is not in use, that is, when it is being transported or stored. That is, in this invention, among the U-shaped ear frames 2 to 5 integrally formed in a substantially cross shape in plan view with a flat plate 6 in between, a pair of U-shaped ear frames 3, which are located on the same axis,
5, one ear frame 5 is formed so that its U-shaped opening faces upward, and the other ear frame 3 faces downward (see Fig. 1b and Fig. 6),
Since the fastening bolt 19 is pivoted to the upwardly facing ear frame 5, the fastening bolt 15 is reversed to the upward U-shaped opening side (that is, upwardly in FIG. 4) and the fastening arm rod 1 is attached.
Of the pair of U-shaped ear frames 2 and 4 located on the same axis, one of the U-shaped ear frames 2 and 4 can be folded low in bulk between the metal fitting body 1 and the U-shaped ear frame 4. The other ear frame 2 is formed to face upward, and the fastening bolt 14 is pivoted to the downward facing ear frame 2. Therefore, the fastening bolt 14 is directed downward to the U-shaped opening side (i.e., downward in the figure). By flipping the fastening bolt 14 (towards the side) and storing the fastening bolt 14 between the fitting body 1 and the fastening arm rod 12 in a low-volume manner, the bolt 14 can be placed in a low-volume state between the fitting body 1 and the fastening arm rod 12. As is clear from the comparison with the used state shown in FIG. It can be folded to a bulky size, and as an additional effect, the fastening bolt is protected between the fastening arm rod and the fitting body, so the bolt thread part will not be damaged by vibrations and shocks during transportation. .

As described above, according to this invention, the main body of the metal fitting is composed of a flat plate part and an ear frame having a substantially U-shaped cross section and integrally formed with the flat plate part sandwiching the flat plate part. Since the fastening arm rod and the fastening bolt for gripping the material to be fastened are pivotally connected to each other, the number of man-hours and component parts required for manufacturing the metal fitting body are extremely small, which naturally makes it possible to manufacture the metal fitting at a low cost. I can do it.

However, in this invention, the pair of U-shaped ears sandwiching the flat plate part and located on the same axis are provided on substantially the same plane so that the materials to be fastened are in surface contact with each other. Almost no stress from the fastened materials is applied to the metal fitting body, so it can be used stably for a long period of time.

Furthermore, in this invention, one of the pair of U-shaped ear frames located on the same axis in the metal fitting body is bent upward, and the other one is bent downward. When in use, the pair of fastening bolts pivotally attached to the U-shaped ear frame can be compactly folded and stored between the metal fitting body and the fastening arm rod, so that they do not take up much space when being transported or stored.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, of which Figures 1a and 1b are a perspective view and a side view of the main body of the metal fitting, which is the main part of this invention. Fig. 2 is a perspective view of the fastening fitting according to this invention, and Fig. 3 is a diagram showing the fastening fitting being used on a scaffolding steel pipe.
FIG. 4, FIG. 5, and FIG. 6 are a perspective view, a front view, and a plan view showing the fastening fitting in a folded state. 1...Bracket body, 2-5...U-shaped ear frame, 6...
... Flat plate part, 11, 12 ... Fastening arm rod, 14, 15
... Fastening bolt, 23 ... Reinforcement protrusion.

Claims (1)

[Claims for Utility Model Registration] 1. An ear frame having a substantially U-shaped cross section in a plan view is integrally formed with a flat plate portion sandwiched therebetween, and one of a pair of U-shaped ear frames located on the same axis. One U-shaped ear frame is bent upward and the other one is bent downward, and the fastening arm rod is attached to one U-shaped ear frame, and the fastening bolt is attached to the other U-shaped ear frame. A pair of U-shaped ears that are pivoted and located on the same axis with a flat plate part in between are provided on substantially the same plane so that the materials to be fastened are in surface contact with each other, such as scaffolding steel pipes. Fasteners for wood. 2. A fastening fitting for a material to be fastened, such as a scaffolding steel pipe, as set forth in claim 1 of the utility model registration claim, in which a reinforcing protrusion is formed in a bulging portion of the fitting body at a portion where the material to be fastened comes into contact.