JPH0222176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tube joining structure for joining an end of a tube to a connected part.

(Prior art) For example, in prefabricated buildings, it is necessary to devise ways to connect the cylindrical corner posts (pipe body) of the building unit to the corner posts (connected parts) of the foundation or building units on the lower floor. be.

For example, in the joint structure described in Japanese Utility Model Publication No. 53-19605, a guide pin consisting of a tapered head part and a shank part is prepared, and the shank part of this guide pin is connected to the upper end of the column on the lower floor. to screw onto. Further, an end plate is provided at the lower end of the column on the upper floor, and the guide pin is inserted into the insertion hole of the end plate, so that the column on the upper floor is placed on the column on the lower floor.

In the joint structure described in Japanese Utility Model Application Publication No. 57-183303, a nut tightening operation opening is provided on the lower side of the column, an end plate is provided at the lower end of the column, and a cover is inserted into the insertion hole of the end plate. A bolt protruding from the connecting portion is inserted, and a nut is screwed onto the bolt by operation from the operation port and tightened, thereby joining the pillars.

In the joint structure disclosed in Japanese Patent Application Laid-Open No. 147113/1980, a column of an upper floor unit having an end plate provided at the lower end opening is mounted on a column of a lower floor unit. Then, magnetically attach a bolt to the tip of the T-wrench, insert the T-wrench through the upper end opening of the pillar on the upper floor, insert the bolt into the hole in the end plate, and screw it into the pillar on the lower floor. wear it.

(Problem to be solved by the invention) However, in Utility Model Publication No. 53-19605, accurate positioning is possible using a tapered guide pin, but the guide pin is simply inserted into the insertion hole of the end plate. Therefore, the connection strength was very weak.

In Japanese Utility Model Application Publication No. 57-183303, although the joint strength of the pillars is strengthened, there is a drawback that the strength of the pillars themselves is reduced due to the formation of the operation port. In addition, in order to work from the operation port, a work hole had to be provided in the floor, outer wall, etc.

In Japanese Patent Application Laid-Open No. 50-147113, the connection strength is increased and the strength of the column itself does not decrease because no opening is formed in the column, but there is a risk that the bolt held with a T-wrench may fall before the screwing operation. There is, and also,
It was difficult to position and screw the bolts, resulting in poor workability. Additionally, the lack of guide pins made it difficult to accurately position the upper floor columns and place them on the lower floor columns.

(Means for Solving the Problems) This invention has been made to solve the above problems, and its gist is to provide a pipe joining structure for joining an end of a pipe to a connected part. An end plate provided at the end of the body and having a non-circular insertion hole; and a locking device disposed on the end plate and having a non-circular insertion hole substantially the same shape as the insertion hole of the end plate. It consists of a plate, a shank part, and a head part, and the shank part is screwed onto the above-mentioned connected part, and the head part has a narrow taper, and the end surface on the connected part side is connected to each insertion hole of the above-mentioned end plate and locking plate. and a guide pin formed in a non-circular shape that is approximately the same shape or slightly smaller than the guide pin, and the guide pin is inserted into each insertion hole of the end plate and the locking plate, and the head portion thereof is inserted into the insertion hole of the locking plate. The pipe joining structure is characterized in that the end plate is tightened to the connected part side via the locking plate in a state shifted from the hole.

(Function) Screw the guide pin into the connected part. This guide pin is inserted through the non-circular insertion holes of the end plate of the tube and the locking plate. By rotating the guide pin, the end plate is tightened to the connected portion side via the locking plate while the head portion of the guide pin is shifted with respect to the insertion hole of the locking plate. Thereby, the tube and the connected portion are firmly joined.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, a column 1 (pipe body) is, for example, a corner column of a second-story building unit, and is made of steel and has a cylindrical shape with a rectangular cross section. Pillar 1 on this second floor
is column 11 (connected part) of the building unit on the first floor.
The guide pins 30 are connected to the connecting plates 40 via the connecting plates 40.

A flat end plate 3 is welded to the upper open end 2 of the column 1. The end plate 3 has a planar shape substantially equal to the cross-sectional shape of the column 1.
A circular insertion hole 4 is provided in the center of the end plate 3.
is formed. On the back side of the end plate 3,
A back nut 5 is welded to correspond to the insertion hole 4. Furthermore, a plurality of diaphragms 10 having insertion holes 10a are provided in the middle portion of the column 1.

A flat end plate 7 is welded to the lower open end 6 of the column 1, as shown in FIG. The end plate 7 has a planar shape substantially equal to the cross-sectional shape of the column 1. A non-circular insertion hole 8 is formed in the center of the end plate 7 . This insertion hole 8 has a circular part 8a formed in the center with the same diameter as or slightly larger than the outer diameter of a shank part 32 of a guide pin 30, which will be described later, and a long continuous part extending from both sides of this circular part 8a. Projecting parts 8a, 8
It has b. Additionally, four receiving pins 9 are provided on the upper surface of the end plate 7 so as to surround the insertion hole 8.
stands out. The receiving pin 9 has a shank portion 9a that is screwed into the end plate 7, and a head portion 9b having a larger diameter than the shank portion 9a.

A disk-shaped locking plate 20 is arranged on the upper surface of the end plate 7. As shown in FIGS. 1 and 2, the locking plate 20 has its peripheral surface in contact with the shank portion 9a of the receiving pin.
It is rotatable, and the center of rotation is prevented. Further, the locking plate 20 is restricted from moving upward by the head portion 9b of the receiving pin 9. The locking plate 20 is formed with a non-circular insertion hole 21 having substantially the same shape as the insertion hole 8 of the end plate 7. This insertion hole 21 has a circular portion 21a.
and a projecting portion 21b. In addition, the insertion hole 2
1 and insertion hole 8 are aligned, locking plate 2
0 is weakly bonded to the end plate 7 with adhesive to prevent it from turning inadvertently. A pair of stoppers 22, 22 protrudes from the upper surface of the locking plate 20 at predetermined positions facing each other at 180 degrees.

An end plate 13 is welded to the upper open end portion 12 of the column 11 on the first floor, similarly to the column 1 on the second floor. In the center of this end plate 13,
A circular insertion hole 14 is formed, and a back nut 15 is welded to the back surface of the hole 14 in correspondence with the insertion hole 14.

The guide pin 30 includes a shank portion 32 having a threaded portion 31 and a conical (tapered) head portion 33. shank part 32
is adapted to be screwed onto the back nut 15. Further, the end surface of the head portion 33 on the side of the end plate 13 is formed into a non-circular shape that is the same shape as or slightly smaller than each of the through holes 8 and 21. That is,
This end face has a circular portion 33 having the same diameter as the shank portion 32.
a, and projecting portions 33b projecting on both sides of the circular portion 33a.

The connecting plate 40 is formed to be approximately twice the size of the end plate 13 of the pillar 11, and is used to position and connect the adjacent pillars 11, 11 of one layer to each other. This connection plate 40 is formed with two non-circular insertion holes 41, 41 that are approximately the same shape as the respective insertion holes 8, 21 described above.

In the above configuration, the end plate 7 of the column 1 on the second floor is joined to the end plate 13 of the column 11 on the first floor by one guide pin 30. Specifically, first, the shank portion 32 of the guide pin 30 is screwed into the back nut 15 of the end plate 13 of the first floor column 11. From this state, as shown in FIG. 7, the guide pin 30 is inserted into the insertion hole 41 of the connecting plate 40, and the connecting plate 40 is placed on the end plate 13.

Next, the building unit on the second floor is suspended by a crane or the like, and the end plate 7 of the column 1 and the locking plate 20 are
The pillar 1 is placed on the pillar 11 while inserting the guide pin 30 through each of the insertion holes 8 and 21. At this time, since the head portion 33 of the guide pin 30 is conical, the column 1 can be guided accurately and easily.

Next, as shown in FIG. 9, a long T is inserted through the insertion hole 4 of the end plate 3 of the column 1 and the back nut 5
A wrench 50 (tightening jig) is inserted, and while being guided through the insertion hole 10a of the diaphragm 10, its tip recess 51 is fitted into the head portion 33 of the guide pin 30, and the guide pin 30 is rotated. At this time, since there is a slight gap between the head portion 33 of the guide pin 30 and the locking plate 20, as shown in FIG.
As shown in FIG. 2, initially only the guide pin 30 rotates and the locking plate 20 does not rotate. and,
When the projecting portion 33b of the head portion 33 of the guide pin 30 hits the stopper 22 of the locking plate 20, both the guide pin 30 and the locking plate 20 rotate. At this time, the adhesive state between the locking plate 20 and the end plate 7 is released. The above-mentioned locking action ensures that the head portion 33 of the guide pin 30 and the insertion hole 21 of the locking plate 20 are misaligned by 90 degrees, so that the head portion 33 of the guide pin 30 is aligned with the end plate 7 and the connecting plate. 40 insertion holes 8, 4
1, attach the end plate 7 to the first floor column 1.
It can be reliably tightened to the end plate 13 side of 1. As a result, the upper and lower columns 1 and 11 are firmly joined by tightening the single guide pin 30.

Further, since the operator can hold the guide pin 30 by hand and fit it into the nut 15 of the end plate 13, the screwing operation of the guide pin 30 is easy. The guide pin 30 can be rotated and tightened using the elongated wrench 50, and there is no need to provide an operation port on the lower side surface of the column 1, so that the strength of the column 1 does not decrease. Moreover, the T-wrench 50 is
Guide pin 30 screwed onto the pillar 11 on the first floor in advance
Since it is only necessary to tighten the screws, the tightening work can be performed reliably and easily.

In the joined state shown in FIG. 1, the shank portion 32 of the guide pin 30 is inserted into the circular hole 8a of the insertion hole 8 of the end plate 7, and only a small gap is formed between the two. It also has sufficient strength against the horizontal shearing force acting between the column and the column 11.

This invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, in order to confirm the rotation of the locking plate 20, in other words, the completion of the tightening work, a small hole may be made in the corner of the pillar 11 and observed. As shown in , one end of a wire is connected to the locking plate 20, and the other end is brought out through a small hole (not shown) in the pillar 11, and this wire is pulled in by the rotation of the locking plate 20. may be observed. Also. Each insertion hole 8, 2 of the locking plate 20 and the end plate 8
The shape of column 1 may be any shape as long as it is non-circular, and also when connecting column 1 to a foundation etc.
This invention can be applied.

(Effects of the Invention) As described above, according to the present invention, the tube body can be accurately and easily positioned with respect to the connected portion by guiding with the guide pin. By tightening this guide pin via the locking plate, the end of the tube can be firmly joined to the connected part. Also,
Since a long tightening jig can be used, there is no need to provide an operating port for the joining operation near the joining part of the tubular body as in the conventional case, and a decrease in the strength of the tubular body can be prevented.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
FIG. 1 is a sectional view showing the joined state of the columns, FIG. 2 is a sectional view taken along the line - in FIG. 1, FIG. 3 is a plan view of the end plate, and FIG. 4 is a plan view of the locking plate.
5 is a side view of the same, FIG. 6 is a plan view of the connecting plate, and FIG. 7 is a sectional view showing the state immediately before the connecting plate and the end plate of the column are inserted into the guide pin,
Figure 8 is a plan view of the first floor pillar with the guide pin screwed on;
Figure 9 is a cross-sectional view showing the state just before tightening the guide pin with a T-wrench, and Figure 10 is the middle of Figure 9.
11 is a cross-sectional view taken along the line; FIG.
FIG. 2 is a sectional view taken along line XII-XII in FIG. 11. 1... Column (pipe body), 2... End portion, 7... End plate, 8... Insertion hole, 11... Column (connected part),
20... Locking plate, 21... Insertion hole, 30...
...Guide pin, 32...Shank part, 33...Head part.

Claims (1)

[Claims] 1. In a tube joining structure in which the end of the tube is joined to the connected part, an end plate provided at the end of the tube and having a non-circular insertion hole, and an end plate disposed on the end plate. It consists of a locking plate having a non-circular insertion hole that is approximately the same shape as the insertion hole of this end plate, a shank portion, and a head portion, the shank portion being screwed onto the connected portion, and the head portion having a tapered shape. and a guide pin whose end surface on the side of the connected part is formed into a non-circular shape that is the same shape or slightly smaller than each insertion hole of the end plate and the locking plate, and the guide pin and is inserted into each insertion hole of the locking plate, and with its head portion displaced from the insertion hole of the locking plate, the end plate is tightened to the connected part side via this locking plate. A pipe joint structure characterized by: