JPH0310281Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an orthogonal type fastening fitting for pipe materials used for fastening orthogonal pipe materials in framing pipe materials used for construction scaffolding, etc.

[Technical background of the invention and its problems]

Conventionally, in this type of orthogonal fastening fitting, each C-shaped gripping part that grips orthogonal pipe members is rotatably attached to a cross-shaped pedestal, and each is inserted into a bolt hole near the tip of the gripping part. A bolt is used that connects perpendicular vertical and horizontal pipes by engaging a small hole drilled near the tip of the bolt with a projection attached to a cross-shaped pedestal and tightening the nut. However, this metal fitting has a weak force to withstand the shearing force applied to support the orthogonal pipe material, and the bolt tightening the grip or the protrusion that engages with it may be destroyed. It has drawbacks such as being dangerous and having a complicated structure, making it unsuitable for mass production.

In addition, regarding metal fittings in which the flat parts of the tube material gripping parts are joined back to back and the tube materials are fastened so as to cross at right angles, there are also publications such as Utility Model Publication No. 41-13241 and Utility Model Publication No. 35-25552.
No. 1, Utility Model Publication No. 57-58645, Japanese Patent Application Publication No. 53-96227, etc., but none of these are intended to increase the shear strength, which is the original purpose of orthogonal fastening metal fittings, and are not suitable for mass production. There were various drawbacks such as:

That is, in the fastening fitting of Utility Model Publication No. 13241/1973, a tongue-like piece is provided so that a window is formed by punching in the flat part that is the joining part, and this tongue-like piece is inserted into the window of the other fastening fitting. They are fitted into the flat parts and bent and fixed to the flat parts, respectively, and are connected so as to embrace each other.

However, simply bending and fixing them to each other in this way does not increase the shear strength, and in actual use, it is impossible to tighten them if they are produced in exactly the same shape. Inconveniences arise, such as having to produce one and the other to be combined individually.

And regarding the invention of Utility Model Publication No. 35-25552,
A bolt hole and a small hole are drilled in the flat part of one fastening metal joint, and a protrusion corresponding to this small hole is provided in the flat part of the other joint, and a hole equal to the flat seat is bored between them, and the height of the protrusion is It has a structure in which a washer having a thickness of 100 mm or more is inserted. By inserting and inserting washers, the purpose is to support the pipe material perpendicularly or parallelly, as well as to support it at a certain angle. It was necessary to make two types, one shaped and one shaped.

Furthermore, the device disclosed in Japanese Utility Model Application Publication No. 57-58645 rotatably connects a pair of fastening fittings to each other by a shaft member, and furthermore, a holding means for holding both fastening fittings in a non-rotatable manner is provided between both fastening fittings. This is a pipe material tightening device that prevents the welded parts and riveted parts of the fastening fittings from being sheared and the frame pipe material falling due to excessive loads applied to the free end side of the horizontal pipe material when the frame or frame is disassembled. It is only intended to prevent. Moreover, according to the holding means for non-rotatably holding the tightening device, one of the pair of fastening fittings is formed with a concave portion and the other is formed with a convex portion. Therefore, it is not possible to confirm whether or not both fastening fittings are connected in the proper position, and in particular, even if the connecting part of the fastening fittings is deformed due to excessive load, it is difficult to check whether the connecting parts of the fastening fittings are structurally easily deformed or not. There was an inconvenience that could not be determined. In other words, once a job site has been completed, these types of fastening fittings are collected and carefully sorted based on the technical instructions, but even if the lids and bolts are easily checked for deformation, rust, etc., they are important. Deformed or deformed rivets and pins cannot be confirmed due to the structure, and inspection of them must be done exclusively, and if used beyond the limits of use, the scaffolding can easily become dangerous. . Furthermore, two types of molds are required to form the pair of fastening fittings, resulting in a problem of high manufacturing costs.

In the structure connecting fittings disclosed in JP-A No. 53-96227, a pair of base fittings are each provided with a phase difference of 90°,
Each base metal fitting is integrally fixed with a plurality of rivets. This type of fixing means is extremely common as a means of fixing connecting fittings called a so-called orthogonal clamp, and this kind of fixing means alone has a limited limit strength against excessive loads applied in the orthogonal direction. Therefore, it has been desired to provide an orthogonal type fastening fitting that has excellent strength against this load.

[Purpose of invention]

Therefore, this idea was devised to eliminate the above-mentioned drawbacks of conventional fastening fittings, and the joint flat part of each orthogonal fastening fitting for pipe materials used as a pair is made by embossing. Although the convex part, the small hole that fits into the convex part, and the rivet hole have the same shape, they are provided so that they engage correspondingly when joined orthogonally, so that the joint part can be easily The purpose of the present invention is to provide an orthogonal type fastening fitting for pipe materials that dramatically increases the strength against shearing force, has the same structure, is suitable for mass production, and is extremely inexpensive.

[Summary of the idea]

Therefore, the gist of this invention is to provide two protrusions at a fixed interval on the flat joint part, and to move the two protrusions in the same direction around the midpoint of the line connecting the protrusions. Two small holes of a size to fit into the convex parts are drilled at each position rotated 90 degrees, and when the rivet holes are further rotated 90 degrees about the midpoint, the rivet holes are formed at positions where they overlap each other. A pair of fastening fittings are formed, the convex portion of one fastening fitting is fitted into the small hole of the other fastening fitting, and a rivet is inserted into the mutually overlapping rivet holes of both fastening fittings. This is due to the fact that they were joined together.

[Example of idea]

One embodiment of this invention will be described below. The reference numeral A shown in the figure is a first fastening fitting, and this first fastening fitting A is attached to a connecting piece 1 having a substantially hook-shaped cross section and a shaft attached to one end of the connecting piece 1. C-shaped fastening movable piece 2
They are formed in pairs with exactly the same shape so that they can be combined and connected to each other. The free end of the movable tightening piece 2 is provided with a notch 5 into which a tightening bolt 3 pivotally attached to the other end of the joint piece 1 engages. The joining flat part 6 of the joining piece 1 is provided with two convex parts 7 by embossing at an appropriate constant interval in the central lateral direction. Then, centering on the midpoint of the line connecting these two convex portions 7,
Two small holes 8 each having a size to fit into the two protrusions 7 are formed at positions where the two protrusions 7 are rotated 90 degrees in the same direction.
Each hole is perforated vertically. And these 2
Four rivet holes 9 of the same size as the small holes 8 are drilled at four corners of a square where each of the protrusions 7 and the small holes 8 are at the midpoints of one side.

The two protrusions 7 are not limited to being provided in the horizontal direction, but may be provided in any position, such as in the vertical direction or in the diagonal direction, as long as they have an appropriate constant interval.
The two small holes 8, which are sized to fit into these convex portions 7, have a positional relationship corresponding to the two convex portions 7, respectively, and are aligned with the line connecting the two convex portions 7. These two protrusions 7 are drilled at positions rotated 90 degrees in the same direction about the midpoint. The convex portion 7 of one of the fastening fittings A
is fitted into the small hole 8 of the other fastening fitting A, and a rivet 10 is inserted into the overlapping rivet hole 9 of both fastening fittings A and B to join them.

Furthermore, the rivet hole 9 is 90 degrees centering on the midpoint.
The size and number are not particularly limited as long as they are positioned so that they overlap each other when rotated.

Next, to explain the use of this, the first fastening fitting A
and the second fastening fitting B are used as a pair by joining the joining flat portions 6 of the respective joining pieces 1 such that they are orthogonal to each other. That is, the convex part 7 provided on the joint flat part 6 of the first fastening metal fitting A is fitted into the small hole 8 bored in the joint flat part 6 of the second fastening metal fitting B, and at the same time, the convex part 7 provided on the joint flat part 6 of the second fastening metal fitting B is fitted. The convex part 7 provided on the joint flat part 6 is fitted into the small hole 8 provided on the joint flat part 6 of the first fastening metal fitting A, and further, each of the first fastening metal fitting A and the second fastening metal fitting B is fitted. Four rivet holes 9 drilled in the joining flat part 6 are fixed with rivets 10 to join the first fastening fitting A and the second fastening fitting B. Then, the vertical and horizontal framework tubes X are sandwiched between the joint piece 1 and the movable tightening piece 2 of the first fastening fitting A and the second fastening fitting B, respectively, and are pivoted to the joint piece 1. The tightening bolt 3 is engaged with the notch 5 of the movable tightening piece 2 and tightened with the nut 4 to firmly fix it.

[Effect of idea]

Therefore, two protrusions 7 are provided at regular intervals on the joining flat portions 6 of each of the pair of orthogonal fastening fittings for pipe materials, that is, the pair of first fastening fittings A and second fastening fittings B. Two small holes 8 having a size to fit into the protrusions 7 are formed at positions where the two protrusions 7 are rotated 90 degrees in the same direction around the midpoint between the protrusions 7.
Since the joint flat part 6 of the joint piece 1 of the first fastening metal fitting A and the second fastening metal fitting B are joined perpendicularly, the joint flat part 6 of the first fastening metal fitting A is bored. The two convex portions 7 are fitted into the two small holes 8 bored in the joint flat portion 6 of the second fastening metal fitting B, respectively, and the two convex portions 7 of the second fastening metal fitting B are fitted into the two small holes 8 formed in the joint flat portion 6 of the second fastening metal fitting B. The portion 7 also fits into the small hole 8 of the joint flat part 6 of the first fastening fitting A to engage with each other, and the first fastening fitting A holds the frame tube material X in the vertical or horizontal direction, respectively. This has the effect that the strength against the rotational force in the opposite direction, that is, the so-called shearing force, applied to the second fastening fitting B is extremely strong. Therefore, it is possible to provide a fastening fitting that has extremely superior load-bearing strength compared to a conventional fastening fitting of this type called a so-called orthogonal clamp, which is connected by four rivets.

Since the joint flat portion 6 of the first fastening fitting A and the second fastening fitting B is provided with rivet holes 9 which overlap each other when rotated 90 degrees around the midpoint, the first fastening fitting A and second fastening fitting B
When the rivet holes 9 of the first fastening metal fitting A and the second fastening metal fitting B overlap each other, the rivet holes 9 of the first fastening metal fitting A and the second fastening metal fitting B are fixed with a rivet 10, and the first fastening metal fitting A and the second fastening metal fitting B are connected to each other. The fastening fitting B can be easily joined.

Moreover, while fitting the convex portion 7 of one fastening metal fitting A into the small hole 8 of the other fastening metal fitting A,
Since the rivets 10 are inserted into the rivet holes 9 of the two fastening fittings A and B, which overlap with each other, and the two fastening fittings A and B are joined together, it is possible to confirm whether or not both the fastening fittings are connected in the proper position. . Therefore, the problem of conventional fasteners of this kind, where the scaffolding is likely to become dangerous if used beyond its usage limit, has been solved.

Furthermore, since the pair of fastening fittings A and B are both formed in the same shape, they are easy to manufacture.
Compared to conventional fastening fittings that require two types of molds to form a pair of fastening fittings, the fastening fittings can be provided at an extremely low cost.

Further, as shown in the figure, a square shape is formed such that the convex portion 7 and the small hole 8 provided in the joint flat portion 6 of the first fastening fitting A and the second fastening fitting B are respectively at the midpoint of one side. If four rivet holes 9 of the same shape as the small holes 8 are drilled at the four corner positions, there will be a total of six small holes 8 and rivet holes 9 of the same shape, three in parallel. can be done extremely easily.

The orthogonal fastening fitting formed in this way has two convex portions 7 provided on the joint flat portion 6.
The combination of the two small holes 8 that fit into these and the rivets 10 through the four rivet holes 9 dramatically strengthens the strength against shearing force applied to the joint.

That is, according to a shear strength test of the joint of the orthogonal fastener according to this invention, the shear torque was approximately 10,500
Kg/cm, which increases the strength by approximately 64% compared to the conventional product which only had 6400 Kg/cm, and greatly reduces the risk of shearing accidents of orthogonal fastening fittings used in the framework of pipe materials at construction sites. It has very beneficial effects such as reducing

Then, this pair of first fastening fittings A and second fastening fittings
Since it has exactly the same shape as the fastening fitting B and its structure is extremely simple, it is suitable for mass production and can be provided at low cost.

Not only that, when the first fastening metal fitting A and the second fastening metal fitting B are assembled and connected with the rivet 10, the convex part 7 and the small hole 8 in each joint flat part 6 fit into each other. In the fitted state, it can be visually recognized that the protrusion 7 is located within the small hole 8 (see FIG. 2). As a result, for example, due to repeated use, a shearing load is applied to the rivet 10, and as this gradually increases, the protrusion 7 in the small hole 8 slides away from its center. By looking at this, you can easily check when the usage limit is reached.
Therefore, during repeated use, the presence or absence of load resistance can be easily checked by looking at the positional deviation between the convex portion 7 and the small hole 8, which dramatically improves the safety of on-site work. is possible.

As explained above, according to this invention, the convex part, the small hole that fits into the convex part, and the rivet hole are engaged with each other at orthogonal positions in each joint flat part of the orthogonal type fastening fitting for pipe materials. Because it is positioned so that In addition, each pair of fastening fittings has exactly the same shape and has a simple structure, so great effects such as mass production at low cost can be expected.

[Brief explanation of the drawing]

1 to 3 show an embodiment of this invention, in which FIG. 1 is a perspective view, FIG. 2 is a perspective view in a used state, and FIG. 3 is a sectional view in a used state. A...First fastening fitting, B...Second fastening fitting, X
... Frame pipe material, 1 ... Joint piece, 2 ... Tightening movable piece, 3 ... Tightening bolt, 4 ... Nut, 5 ... Notch, 6 ... Joint flat part, 7 ... Convex part , 8...Small hole, 9...Rivet hole, 10...Rivet.

Claims (1)

[Claims for Utility Model Registration] 1. Two protrusions are provided at a fixed interval on the flat joint part, and the two protrusions are arranged at 90 degrees in the same direction with the center of the line connecting the protrusions as the center. Two small holes each large enough to fit into the convex portion are drilled at the rotated position,
Further, if you rotate it 90 degrees around the midpoint,
A pair of fastening metal fittings each having rivet holes formed at positions where they overlap each other is formed, and the convex portion of one fastening metal fitting is fitted into the small hole of the other fastening metal fitting, and the two fastening metal fittings are connected to each other. An orthogonal type fastening fitting for pipe materials, characterized in that a rivet is inserted into the rivet hole and joined together. 2. A square with two protrusions horizontally provided, two small holes that fit into these protrusions vertically, and the two protrusions and the small holes each being the midpoint of one side. The orthogonal type fastening fitting for pipe materials according to claim 1, which is a utility model registration, and has four rivet holes having the same shape as the small holes at the four corners of the pipe.