JPH0119683Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure for temporary bleachers used for various outdoor and indoor events, scaffolding for construction work, and other frame structures.

For example, temporary bleachers are constructed by constructing a frame using supports such as metal pipes and horizontal frames, scaffolding boards are placed at required points on the frame, and seats are placed on top of the frames. It has a skeleton structure. In this case, an arbitrary number of support rods made of pipes are connected to form a support depending on the height (length) of the support, but in the conventional support joint structure, the support structure is as shown in Figure 7. A joint member 22 is rotatably inserted into the upper end of the rod 21, and an engagement hole 24 in the form of a circumferentially elongated hole continuous with the guide groove 23 is provided in the upper part of the joint member 22, into which the joint member 22 is fitted. A protrusion 25 that fits into the engagement hole 24 using the guide groove as a guide is provided on the inner periphery of the lower end of the upper support rod 21, and the joint member 22 is attached with the lower end of the support rod 21 fitted into the joint member 22. The protrusion 25 is engaged with the stopper position of the engagement hole 24 by rotating in the direction of the arrow. However, with the above-mentioned joint structure, there is a risk that the struts may rotate unexpectedly due to shock or vibration, causing them to loosen or come off. Therefore, for safety reasons, other chains, thin bars, or other members are used to connect the upper and lower struts. This requires troublesome work, such as having to connect the terminals separately, and improvements are desired.

In view of the above, the present invention was devised for the purpose of improving the safety of the strut joint and the usability of the strut. In addition to the structure, abutments for openings are provided at the top and bottom of each strut component rod,
The socket fixed to the end of the horizontal rod is fitted across the lower spigot of the upper support rod and the upper spigot of the lower support rod, and the upper and lower at least The upper spout protrusion is equipped with a retaining pin, and the pin prevents the horizontal frame from coming off.

Hereinafter, the details of the present invention will be explained based on the drawings.
Figures 1 to 3 show a relatively short support rod 1 made of steel or other metal pipes, and 2 is a support rod with a central portion mainly consisting of a small diameter pipe that can be fitted into the support rod 1. A joint member provided with a large diameter portion 3 having the same diameter as the rod 1 is shown. Socket protrusions 4 and 5 are fixedly attached to the top and bottom of the outer surface of the support rod 1 in a standing manner.
These spigot protrusions 4 and 5 are provided with a large diameter part 6 on the lower side that serves as a stopper by fitting and welding a sleeve thereon, and a mounting plate 7 is welded to the outer surface of this large diameter part. Furthermore, the mounting plate 7 is the strut structure rod 1.
Welded and attached to the outside of the In this installed state, there is a gap between each spout protrusion 4, 5 and the strut structure rod 1, and between the upper and lower spout protrusions 4, 5 for fitting a horizontal frame side socket, which will be described later. Extra time〓
8 and 9 are provided. Further, the upper spout protrusion 4 is formed slightly longer than the lower spout protrusion 5, and as shown in FIGS. 3 and 4, a vertical slit 10 is provided at the upper end. A support shaft 11 is inserted through the slit 10 in a direction perpendicular to the slit 10, and a long plate-shaped retaining pin 1 is inserted into the slit 10.
2 is installed inside the pin 12, and the retaining pin 12 is rotatably supported by passing the spindle 11 through a long hole 12a provided in the pin 12. It fits within the shaft diameter of the spigot protrusion 4, and when turned horizontally as shown by the solid line, the protrusion 4
It is constructed so that it protrudes outward on both sides.

In the drawing, the upper and lower opening protrusions 4 and 5 are provided at two locations 180° apart in the circumferential direction of the strut component rod 1, but they may be provided at one location or at three or more locations at each required angle. good. In addition, the retaining pin 12 can be provided on the upper spouting protrusion 4 as well as on the lower splicing protrusion 5 in the same manner as described above.

On the other hand, the horizontal frame 13 to be hung on the support is a fence-like body in which a horizontal rod 15 is connected to a vertical rod 14 as shown in FIG. Sleeve-shaped sockets 16 and 17 that can fit into the protrusions 4 and 5 above and below at the same interval as the protrusions 4 and 5 are fixed by welding means or the like.

Therefore, when constructing the framework of a scaffold, etc., an arbitrary number of support rods 1 are used, and one end of the joint member 2 is inserted into the upper end of the lower support rod 1 to form the large diameter portion 3. At the same time, the joint member 2
The lower end of the upper support rod 1 is fitted to the other end, and both support rods 1, 1 are connected to the large diameter portion 3 of the joint member 2.
are connected in a butt-like manner. Thus the fifth
After connecting the struts 18 of the desired height as shown in the figures and FIG. Fit the rod (this is shown as 1a in FIGS. 5 and 6) into the lower socket protrusion 5 until it abuts the large diameter part 6, and the other lower socket 17.
With the retaining pin 12 standing vertically in the upper spigot protrusion 4 of the lower support strut (represented by 1b), fit it until it contacts the large diameter part 6, and then remove it. The retaining pin 12 is connected to its elongated hole 12a and the support shaft 1.
1 to pull it upward and rotate it to the retaining position. In this way, the retaining pin 12 prevents the socket 17 from coming out, and the support 1
The horizontal frame 13 is securely connected and fixed to the upper and lower support rods 1a and 1b.
at the same time supporting and keeping them connected. In other words, even though the strut 18 is a connected body of any number of strut-constituting rods 1, the lower socket 17 of the horizontal frame 13 that fits into the upper spout protrusion 4 of the lower strut-constituting rod 1b is removed. The retaining pin 12 prevents the horizontal frame 13 from being removed upward from the lower support rod 1b, and the lower opening protrusion 5 of the upper support rod 1a By engaging with the upper socket 16, the upper support rod 1a is prevented from moving upward relative to the horizontal frame 13, and as a result, the upper and lower support rods 1a and 1b are moved against the horizontal frame 13.
This allows both support rods 1a and 1b to be reliably held in a connected state without fear of coming off without the need for any other connecting means. In addition, by connecting the horizontal frame 13 across the upper and lower support rods 1a and 1b,
The strut strength is reinforced. Then, the horizontal frame 13 is connected to other parts of the column in the same manner as described above,
A skeleton is produced.

As described above, in the present invention, a support is constructed with a support rod connecting body, so a support of any desired height can be easily created by appropriately increasing or decreasing the number of rods used in the support. In addition, it is possible to transport and store the support in a compact state by disassembling the support, and by connecting the upper and lower support rods to the support, the joints of the upper and lower support rods can be reinforced. At the same time, it is possible to prevent the joint portion from coming off or loosening, and a robust frame structure can be obtained. In particular, when connecting the horizontal frame to the column, the upper and lower sockets at the ends of the horizontal frame are fitted into the spigots of the upper and lower strut-constituting rods, and the upper and lower sockets at the ends of the horizontal frame are pulled out using at least the spigots of the lower column-constituting rods. By using locking pins to prevent them from coming out, the upper and lower struts can be locked in a connected state with the horizontal frame, and the strut connection will not be destroyed even by shock or vibration.
Of course, there is no fear of the horizontal frame coming off, and a frame structure with excellent safety can be easily obtained.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a front view of the strut constituting rod, Fig. 2 is an enlarged plan view thereof, Fig. 3 is an enlarged front view of the upper spout protrusion, and Fig. 4 is Similarly, FIGS. 5 and 6 are enlarged side views, front views showing connection operations, and FIG. 7 is a perspective view illustrating a conventional joint structure. 1... Prop constituent rod, 4, 5... Protrusion for spigot, 1
2... Retaining pin, 13... Horizontal frame, 16, 17...
... Socket, 18... Pillar.

Claims (1)

[Scope of utility model registration request] Socket protrusions are fixed in an upright manner on the upper and lower outer surfaces of the support rod made of pipe, and at least the upper spout protrusion is equipped with a retaining pin, and the support rod is used as a joint member. A support is constructed by connecting an arbitrary number of rods through a socket, and a socket fixed at the end of the horizontal frame is connected to a protrusion for the lower spigot of the upper support rod and an upper support for the lower support rod. A joint structure for a frame such as a scaffold, characterized in that the joint structure is configured to fit across the protrusion and to prevent the pull-out by the above-mentioned pull-out retaining pin.