JPH079971Y2 - Temporary support pillar - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable temporary support column used for temporarily supporting a supported member such as a ceiling when constructing a building or mining a coal mine.

[0002]

2. Description of the Related Art A temporary support column has a threaded tube 3 at the upper end of a waist tube 2, and an insertion tube 5 is freely inserted into and removed from the upper end of the threaded tube 3 and is appropriately spaced in the longitudinal direction of the insertion tube 5. In one of the plurality of small holes 9a, 9b, 9c provided in
From the long hole 8 provided in the longitudinal direction of the screw tube 3 to the holding pin 9
The basic constitution is that the holding pin 9 is inserted and is supported from below by the screw ring 7 screwed into the screw tube 3 (see FIG. 2).

Conventionally, this temporary support column has a threaded groove directly formed on the upper end of the waist tube (not shown) or a threaded tube of the same diameter welded on the upper end of the waist tube (not shown). ) Further, as shown in FIG. 5, a collar portion 31 and a grooveless portion 32 are provided at the lower end of the screw tube 3, the grooveless portion 32 is inserted from the upper end of the waist tube 2, and a plurality of caulks on the outer periphery of the waist tube 2 are inserted. Some of them are caulked at the portion 29 and fixed.

[0004]

[Problems to be solved by the invention] Originally, the temporary support pillar was
To be as light as possible for easy handling,
In addition, in order to improve load resistance, it is desirable that the load applied to the insertion tube can be received as straight as possible and evenly by the waist tube, and there is little rattling of the insertion tube. It is desirable that the material of the threaded tube be tough in order to reduce damage to the threads.

However, among the above-mentioned conventional temporary support columns,
If a steel thread is used for the material of the lumbar canal that is cut directly into the upper end of the waist tube, the thread groove will be heavy but heavy, and if an aluminum one is used, the thread groove will be light Is inferior in toughness.

Next, the one in which the threaded tube and the waist tube are welded and fixed to each other must be made of the same kind of metal which is easy to weld the two, and therefore has the same drawbacks as those described above. It is difficult to arrange the threaded tube and the waist tube on the same central axis line for welding. Therefore, if a thin insertion tube is adopted so that the insertion tube can be inserted even if it is bent and welded, rattling will occur in the insertion tube inserted into the waist tube and the insertion tube must be supported on the same central axis line. Is difficult to perform and is inferior in load resistance.

Further, the grooveless portion 31 at the lower end of the screw tube 3 is inserted into the waist tube 2 and the outer circumference of the waist tube 2 is caulked. Increase
The waist tube can be made of aluminum to reduce weight.

However, when it is attempted to firmly crimp the grooveless portion 32 of the threaded tube and the waist tube 2 with the caulking portion 29 of the waist tube, deformation due to the caulking occurs on the inner diameter side of the grooveless portion 32 (see FIG. 5). ). Therefore, if a thin insertion tube is used so that the insertion tube can be inserted even if this deformation occurs, the above-mentioned drawbacks occur. On the other hand, if the caulking at the caulking portion 29 is loosened to such an extent that deformation on the inner diameter side does not occur, the connection between the grooveless portion 32 of the screw tube and the waist tube 2 becomes weak, and careless during construction, storage, transportation, etc. Repeated inversion of the temporary support columns due to mishandling causes the caulking at the caulking portion 29 to be easily removed.

Therefore, an object of the present invention is to provide a temporary support column which can firmly fix the waist tube 2 and the screw tube 3 and is lightweight and excellent in load resistance.

[0010]

In order to solve this problem, in the temporary support column according to the present invention, a screw tube 3 is fixed to the upper end of the waist tube 2, and the insertion tube 5 is attached from the upper end of the screw tube 3. One of the two or more small holes 9a, 9b, 9c provided in a row at an appropriate interval in the longitudinal direction of the insertion tube 5 that can be inserted and removed freely, and has a long hole provided in the longitudinal direction of the screw tube 3. 8. Insert the holding pin 9 from 8 and attach the holding pin 9 to the screw tube 3
In a temporary support column that is supported from below by a screw ring 7 that is screwed in, a long hole 12 that is the same as the long hole 8 of the threaded pipe is provided in the longitudinal direction of the pipe joint 6, and the pipe joint 6 is Inserted from the upper end of the pipe 2, aligning the position of the long hole 12 of the pipe joint with the long hole 8 of the screw pipe 3, and using the welding material 23 arranged in the welding hole 22 of the waist pipe, the waist pipe 2 and the pipe The joint 6 is welded, and the threaded pipe 3 is fitted into the pipe joint 6 and fixed thereto.

[0011]

In the temporary support column according to the present invention having the above-mentioned configuration, the pipe joint is inserted into the waist tube and both are welded with the welding material in the welding hole. Therefore, the waist tube and the pipe joint are on the same central axis line. Since the welding material is put in the welding hole and welded, the both are fixed to the inner diameter side of the pipe joint without deformation.

Further, since the screw tube is fitted into the pipe joint located on the same central axis as the waist tube, the waist tube and the screw tube are located on the same central axis through the pipe joint, and the lower end of the screw tube is Abut the top of the tube.

Further, since the insertion pipe is inserted into the pipe joint having no deformation on the inner diameter side, the inserted insertion pipe is also located on the same central axis as the pipe joint, and the insertion pipe does not rattle.

[0014]

EXAMPLE A temporary support column shown in FIG. 2 comprises a waist tube 2 having a screw tube 3 fixed to the upper end thereof, and an insertion tube 5 inserted from above the waist tube 2.

The insertion tube 5 has two or more round small holes 9a, 9 penetrating in the diameter direction at appropriate intervals in a row in the longitudinal direction.
b and 9c are provided, and a flat receiving plate 51 is provided at the upper end of the insertion tube 5. The small holes 9a, 9b, 9c may be of a size that allows the holding pin 9 to be inserted and penetrated therein, and the number of small holes may be appropriately set according to the length of the temporary support column.

The waist tube 2 is provided with a pedestal 21 at its lower end, and a welding hole 22 for welding a pipe joint at an appropriate position on the outer circumference.
Is provided.

The threaded tube 3 is provided with a foldable handle 71 for screwing a threaded ring 7 which rotates to move the threaded tube 3 up and down, for facilitating rotation. In addition, the threaded pipe 3 is provided with a long hole 8 which penetrates in the diametrical direction and extends in the longitudinal direction. The length of the long hole 8 is smaller than that of the small holes 9a, 9b, 9c of the insertion pipe 5. For each interval, the width is made equal to the diameter of this small hole.

As shown in FIGS. 1 and 3, the pipe joint 6 for connecting the waist tube 2 and the screw tube 3 has an outer diameter of
The waist tube 2 and the screw tube 3 have the same inner diameter, and the same long hole 11 as that of the screw tube 3 is provided. Further, the length of the pipe joint 6 is such that the lower end of the pipe joint 6 is inserted into the waist tube 2,
The length may be such that the screw tube 3 and the stopper ring 4 that prevents the screw ring 7 from rising can be sequentially fitted to the portion protruding from the waist tube 2.

Insert the lower end of the pipe joint 6 into the waist tube 2,
When the long holes 8 and 12 are aligned, the welding material 23 is put in the welding hole 22 of the waist tube 2, and the pipe joint 6 and the waist tube 2 are welded to each other, the inner diameter side of the pipe joint 6 is not deformed. Is firmly fixed.

Further, the screw tube 3 and the stopper ring 4 fitted on the pipe joint 6 are, for example, as shown in FIG.
It may be fixed at 5, 36.

When the pipe joint 6 and the waist tube 2 are welded in this way, the inner diameter side of the pipe joint 6 is not deformed, and the outer diameter of the insertion pipe 5 inserted into and removed from the pipe joint 6 is The diameter can be the same as the inner diameter of the pipe joint 6. Therefore, the inserted insertion tube 5 has no rattling, and the waist tube 2, the screw tube 3, the pipe joint 6 and the insertion tube 5 can all be arranged on the same central axis line. Such a load is transmitted from the holding pin 10 inserted into the small hole of the insertion tube 5 to the screw ring 7 and the screw tube 3 in this order, and is applied straight and evenly to the waist tube 2, which is excellent in load resistance.

Further, since the waist tube 2 and the pipe joint 6 are welded, it is desirable that both are made of the same kind of metal.
Lumbar tube 2, pipe joint 6, plug tube 5, etc. made of aluminum, screw tube 3
If the screws, the screw ring 7 and the like are made of steel and used properly, it is possible to form a temporary support column that is lightweight and has high strength.

This temporary support column is used as follows (see FIGS. 1 and 2). First, the screw ring 7 is lowered to the lowermost part of the screw tube 3, the insertion tube 5 is put in and taken out of the waist tube 2, and in that state, the screw tube among the round holes 9a, 9b, 9c of the insertion tube 5 is inserted. 3 is a circular hole located in the lower part of the elongated hole 8, for example, a circular hole 9
The holding pin 9 is inserted into b, and both ends of the holding pin 9 penetrate so as to protrude from the long hole 8, and the height of the temporary support column is roughly set to be slightly lower.

Next, the base plate 21 of the waist tube 2 is placed on the floor so that the receiving plate 51 of the insertion tube 5 is directly below the supported member, and the screw ring 7 screwed to the screw tube 3 is used as its handle. When it is rotated and raised by using 71, the retaining pin 9 is pushed up by the ascending screw ring 7 and rises in the elongated hole 8, and the insertion pipe 5 having the retaining pin 9 inserted in the round hole 9b is also elastic. It is paid out from the pipe 2 and rises. Then, when the insertion pipe 5 is extended until the receiving plate 51 at the upper end strongly contacts the supported member, the supported member is supported.

When the temporary support column is removed, these operations may be reversed.

If polygonal pipes or elliptic pipes are used for the pipe joint 6 and the insertion pipe 5, the round holes 9a, 9b of the insertion pipe 5,
It is convenient because it is not necessary to perform circumferential alignment so that one of the 9c is located in the elongated hole 11 of the pipe joint 6 (the elongated hole 8 of the screw tube 3). This effect is also due to the fact that the inner circumference of the pipe joint 6 is polygonal or elliptical,
The outer periphery of the pipe joint 6 may be a polygon or an ellipse corresponding to the inner periphery of the pipe joint 6.

[0027]

According to the present invention, since the lower end of the pipe joint is inserted into the waist pipe and welded to each other, and the screw pipe is fitted and fixed to the pipe joint, the structure is simple and the pipe is firmly fixed. You can Further, since the waist tube and the screw tube can be made of different metals, the waist tube can be made of an aluminum-based metal to reduce the weight.

Moreover, since the inner diameter side of the pipe joint is not deformed by welding, the outer diameter of the insertion pipe which can be inserted into and removed from the pipe joint can be made equal to the inner diameter of the pipe joint. , There is no looseness in the pipe joint.

Further, since the waist tube, the screw tube, the pipe joint and the insertion tube can all be arranged on the same central axis line, the load applied to the insertion tube is straightened to the waist tube via the screw tube. It is evenly applied and has excellent load resistance.

[Brief description of drawings]

FIG. 1 is an enlarged cutaway view of a main part of an embodiment.

FIG. 2 is a partially omitted front view of the embodiment.

FIG. 3 is an exploded perspective view of a main part of the embodiment.

FIG. 4 is an enlarged sectional view taken along line AA of FIG.

FIG. 5 is an enlarged cutaway view of a main part of a conventional example.

[Explanation of symbols]

 2 Lumbar tube 3 Threaded tube 4 Stopper ring 5 Insertion tube 6 Pipe joint 7 Threaded ring 8 Long hole of threaded pipe 9a, 9b, 9c Round hole of insertion pipe 10 Holding pin 11 Long hole of pipe joint 21 Base plate 22 Welding Hole 23 Welding material 51 Support plate 71 Handle

Claims (2)

[Scope of utility model registration request] 1. A screw tube 3 is fixed to an upper end of a waist tube 2, and an insert tube 5 is freely inserted into and removed from the upper end of the thread tube 3, and the insert tubes 5 are provided in a row at appropriate intervals in a longitudinal direction of the insert tube 5. In addition, the holding pin 9 is inserted into one of the two or more small holes 9a, 9b, 9c from the long hole 8 provided in the longitudinal direction of the screw tube 3, and the holding pin 9 is screwed into the screw tube 3. In the temporary support column which is supported from below by the screw ring 7, the same long hole 12 as the long hole 8 of the screw pipe is provided in the longitudinal direction of the pipe joint 6, and the pipe joint 6 is attached to the waist pipe 2. It is inserted from the upper end, the position of the long hole 12 of the pipe joint is aligned with the long hole 8 of the screw pipe 3, and the waist pipe 2 and the pipe joint 6 are joined by the welding material 23 arranged in the welding hole 22 of the waist pipe. A temporary support column formed by welding, and fitting and fixing the threaded pipe 3 to the pipe joint 6. 2. The inner circumference of the pipe joint 6 is a polygon or an ellipse, and the outer circumference of the insertion pipe 5 is a polygon or an ellipse corresponding to the inner circumference of the pipe joint 6. The temporary support pillar according to claim 1.