JPS6317853Y2 - - Google Patents

Description

[Detailed description of the invention] Recently, pipe frames made of aluminum alloy, etc. have been widely used, and the applicant previously provided a three-way joint at a node where three pipes intersect in a pipe frame. This relates to a four-way joint where two pipes intersect.

As shown in FIG. 1, the present application includes an A joint that is rotatable around a central axis and rotatable around a shaft pin that pivotally supports the head;
B that can rotate freely around the A′ joint and the tongue piece at one end.
Like the joint, it consists of a B′ joint. It is used at the joint points of the pipe frame, such as the circled points shown in FIG.

First, embodiments of the A joint will be described with reference to FIGS. 3 to 5. The head 1 of the A-joint has a cylindrical shape with a hemispherical shape 2, and a through hole 4 for a shaft pin 3 passes through the head 1 from right to left in the figure. In the embodiment, a cross-recessed round machine screw is used as the shaft pin 3, and the tip of the machine screw is screwed into the head 1 3'. Then, at the apex of the hemisphere 2, from the front to the back, there is a connecting rod 1, which will be described later.
A deep groove 5 is formed as a relief for the groove 6. The body 6 is a cylindrical column with a head 1 and a step 6', and the thickness of the pipe fitted externally to the body 6 is preferably the same as that of the step 6'. The A joint of the embodiment is an integral body made of hard synthetic resin.

The A' joint is exactly the same as the A joint in the illustrated example, but the groove width of the deep groove 5 may be slightly smaller.

Next, we will explain the B joint and B' joint. They are completely the same, and as shown in Figures 1 and 6,
The tip of the B' joint is a tongue piece 7, and a through hole 8 for a connecting rod 16 is opened in the vertical direction approximately in the center of the tongue piece 7. The surfaces where both tongue pieces 7, 7' come into contact with each other are joint B,
Located on the center line 9 of B', a pot-bottom-shaped recess 10 is formed around the through hole 8 on the other surface of the tongue piece. The illustrated recess 10 has the same curved surface as the head hemisphere 2 of the A, A' joints. The body 11 is a cylindrical one-piece body made of hard synthetic resin, and 12 shown in FIG. 6 indicates a pipe that fits into the B joint.

Next, the connecting parts will be explained with reference to FIGS. 8 and 9. Reference numeral 13 denotes a U-shaped metal fitting, which has a female thread 14 at the bottom of the groove that is screwed into the tip of a connecting rod 16, and has a circular hole 15 approximately in the center through which the shaft pin 3 passes from side to side. 16 is a connecting rod that connects A joint and A' joint via B and B' joints,
One end (the upper end in the figure) is provided with a male screw 18 for screwing into the U-shaped fitting, and the other end has a round hole 17 through which the shaft pin 3 of the A' joint passes.

Next, one means of assembling and connecting the four-way joint of the present invention will be outlined. First, as shown in Fig. 3, insert the U-shaped metal fitting 13 into the deep groove 5 of the A joint head, and then tighten the shaft pin (round head screw) 3.
Insert it from right to left as shown in the figure, and insert U-shaped bracket 1.
3 is pivoted and further advanced, its tip is screwed to the A joint head, and the tip of the connecting rod 16 is screwed to the groove bottom 14 of the U-shaped metal fitting 13.

On the other hand, as shown in FIG. 6, the B joint tongue piece 7' and the B' joint tongue piece 7 are brought into contact with each other with the recess 10 facing outward, the through holes 8 are aligned, and the head spherical shape 2 of the A joint is inserted into the upper surface recess 10. Similarly, the spherical head 2 of the B' joint is brought into contact with the lower surface recess 10. At this time, the connecting rod 16
As shown in Figure 3, the lower end of the joint B' is in the deep groove 5 of the joint B', so insert the shaft pin (round head screw) 3 from the right in the figure, pass through the round hole 17 provided at the lower end of the connecting rod 16, and join. The rod 16 is pivotally supported, then advanced further and screwed onto the head of the B' joint.

With the four-way joint of the present invention, if the joints in the four directions can be adjusted to the required angles when constructing the frame, they will not be mutually displaced until the frame is dismantled.
As the shaft pin 3, ordinary machine screws and bolts are sufficient.

The B and B' joints of the four-way joints connected as described above can rotate horizontally, and the A and A' joints can rotate and tilt, so they function as so-called universal joints, and the four joints The purpose of connection can be achieved with one type of this invention for any angle of the node where the pipes intersect.

[Brief explanation of the drawing]

FIG. 1 is an exploded explanatory external view of the parts of the present invention, and the circles in FIG. 2 indicate examples of the positions in which the present invention is used.
In Figure 3, joints B and B' are excluded for convenience of explanation, and joints A
and A' joints are connected, and a partially broken surface is shown in a front view in a vertically aligned position, FIG. 4 is a right side view of FIG. 3, and FIG. 5 is a bottom view of FIG. 3. FIG. 6 is a partially cutaway front view of the four-way joint of the present invention in which the B and B' joints are arranged in a straight line from side to side, with the A joint slanting toward the rear side and the A' joint hanging downward. FIG. 7 is also a partially cutaway view showing a different position with the B' joint omitted. Figure 8 shows the U-shaped metal fitting, with A being a front view and B being a side view. Figure 9 shows the connecting rod, A is a front view and B is a side view. A, A'...Rotation, rotary universal joint, B, B'...
Rotating universal joint, 1... Head, 2... Hemispherical, 3...
...Axis pin, 4...Through hole, 5...Escape groove (deep groove),
7... tongue piece, 8... through hole, 10... recess, 16
...Joining rod, 17...Round hole.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of two joints A and A' that can freely rotate and tilt, and two joints B and B' that can rotate horizontally, the heads of the joints A and A' has a hemispherical cylindrical shape, and the shaft pins 3, 3 pass through the head on the left and right sides, and the head has an escape groove 5 for the connecting rod extending from the front to the back, and the body has a It has a cylindrical shape and is internally fitted into the pipe, and the ends of the B and B' fittings have through holes 8 and 8, respectively.
8, the body is internally fitted into the pipe, and a pot-bottom-shaped recess is formed around the through hole on the upper surface of the tongue, and the recess on the surface of the tongue of B and B' joints is placed on the outside. A,
The head of the A' joint is brought into contact with the joint, and the through hole 17 previously provided at the other end of the connecting rod 16 rotatably supported directly or indirectly on the shaft pin 3 of one A joint head 1 is passed through. A four-way joint on a pipe frame with a shaft pin 3 that passes through the head of the other A' joint. (2) One end of the connecting rod 16 is attached to the bottom surface 14 of the U-shaped fitting 13 that is pivotally supported by the shaft pin 3 of one A joint head.
A four-way joint for a pipe frame according to claim (1) of the utility model registration, wherein the other end is directly pivotally supported by a shaft pin 3 passing through the A' joint head.