JPH0219478Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe support used for formwork support in construction work.

In general, pipe supports for formwork shoring are determined according to the Japanese Industrial Standards (hereinafter referred to as
It is stipulated to use one that complies with JIS (referred to as JIS).

For example, the lumbar pipe that makes up the pipe support is
The screw tube is made according to the standard of type 2 (STK41) specified in JISG3444 (outer diameter x wall thickness = 60.5 mm x 2.3 mm), and the screw tube is made according to the standard (SGP) specified in JISG3452 (outer diameter x wall thickness = 60.5 mm x 3.8mm), and the plug-in tube is regulated to use one of the three types (STK51) specified in JISG3444 (outer diameter x wall thickness = 48.6mm x 2.4mm).

However, in a member that complies with the above standards, the inner diameter of the screw tube is 52.9 mm, and the inner diameter of the waist tube is 52.9 mm.
The outside diameter of the plug-in tube is 48.6mm while it is 55.9mm.
However, when using the insertion tube by inserting it into the screw tube and the waist tube, there is a distance of 4.3 mm between the screw tube and the insertion tube, and a distance of 7.3 mm between the waist tube and the insertion tube.
This creates a gap of mm.

Therefore, in the pipe support described above,
Due to the gaps created between the threaded pipe, the waist pipe, and the insertion pipe, the insertion pipe cannot be maintained perpendicular to the waist pipe, so that the weight of the formwork, reinforcing bars, and the installation of Since the insertion pipe supports the load of concrete, etc. in an eccentric state with respect to the waist pipe from the vicinity of the screw pipe opening, not only the supporting force of the pipe support decreases, but also the formwork is lowered. This resulted in problems such as poured concrete flowing out and pipe supports bending.

This idea was developed in view of the above circumstances.
The purpose is to maintain the insertion pipe in an upright state with respect to the waist pipe, while smoothly removing concrete, etc. that enters the gap between the screw pipe and the insertion pipe through the long hole of the screw pipe. The purpose is to provide a pipe support that can be drained.

Therefore, the present invention provides an inward protrusion having an inner diameter approximately equal to the outer diameter of the insertion tube at the upper end opening of the screw tube, and a plurality of protrusions at the connection portion between the waist tube and the screw tube. When the support pin is passed through the inner circumferential surface of the adjustment pin hole and the lowermost position of the adjustment pin hole, the protrusion is fixed by welding across the waist tube and the screw tube, while the height of the protrusion is set such that an imaginary line connecting the inner surfaces of each of these protrusions is approximately equal to the outer diameter of the insertion tube. It is characterized by this.

The pipe support according to the present invention will be explained below with reference to the embodiment shown in the drawings.

In the figure, 2 is a waist tube with a screw tube 3 fixed by welding at the upper end and a square base plate 5 at the lower end, and 6 is a waist tube with a square receiving plate 7 at the upper end and its length. This insert tube 6 is an insert tube with a plurality of adjustment pin holes 8, 8... provided at appropriate intervals in the horizontal direction, and whose outer diameter is smaller than the inner diameter of the waist tube 2 and screw tube 3. By inserting it into the screw tube 2 and waist tube 3, the pipe support 1 is formed.

A pair of elongated holes 4 extending in the length direction are formed in the screw tube 3 so as to face each other, and a ring-shaped hole having an inner diameter approximately equal to the outer diameter of the insertion tube 6 is formed at the upper end opening thereof. An inward protrusion 11 is provided around the circumference, and a support pin 9 is provided on the inner circumferential surface of the connecting portion between the screw tube 3 and the waist tube 2 and at the lowest position of the adjustment pin hole 8. Three protrusions 12 are arranged at equal intervals in the circumferential direction at positions facing the lower end of the insertion tube 6 when penetrated, and these protrusions 12 are connected to the waist tube 2 and the screw tube. 3 and fixed by welding, as shown in FIG. The dimensions are set to be approximately equal to.

Reference numeral 20 denotes an adjustment ring which is screwed into the threaded tube 3 and has a handle 22 swingably supported on its side through a pin 21. The upper end surface 2 of this adjustment ring 20
3, the adjustment pin hole 8 through the elongated hole 4;
8... is engaged with the support pin 9 passed through it.

The pipe support constructed as described above is configured to pull up the insertion tube 6 inserted into the waist tube 2 so that the receiving plate 7 is at a predetermined height, and furthermore, to Adjustment pin holes 8, 8
Select one pin hole 8 located approximately in the center of the elongated hole 4 provided in the screw tube 3 from among..., pass the support pin 9 through this pin hole 8 through the elongated hole 4, and The adjustment ring 20 screwed onto the threaded tube 3 is rotated to raise the adjustment ring 20 so that its upper end surface 23 engages with the support pin 9. Further, fine adjustment of the receiving plate 7 in the height direction is performed by minute rotation of the adjusting ring 20.

A support beam (not shown) is placed on the support plate 7 that has been set at a predetermined height in this way, a formwork (not shown) is placed on the support beam, and reinforcing bars (not shown) are placed on the top surface of the formwork (not shown). Concrete (not shown) is cast in a reinforced manner, and the dead weight of the formwork, etc., or the load of the reinforcing bars and the concrete to be cast is transferred from the receiving plate 7 to the insertion pipe 6, and then to the insertion pipe. It is transmitted from the screw tube 3 and the waist tube 2 to the base plate 5 through the support pin 9 that passes through the adjustment pin hole 8 provided in the screw tube 3 and the waist tube 2 through the adjustment ring 20 that engages with the support pin 9. .

In the above pipe support, the insertion tube 6 includes an inward protrusion 11 provided at the upper end opening of the screw tube 3 and a plurality of protrusions 12 provided at the connection between the screw tube 3 and the waist tube 2. As a result, it is always maintained in an upright state without being eccentric with respect to the waist tube 2, so that the load applied to the receiving plate 7 can be reliably received.

In addition, since the protrusion 12 is fixed by welding on the inner circumferential surface of the connecting portion between the screw tube 3 and the waist tube 2, spanning both tubes, the screw tube 3 and the waist tube 2 are fixed by welding. This will further increase the strength of the connection.

Therefore, during concrete pouring work, concrete flowing down onto the outer peripheral surface of the screw tube 3 enters the inner peripheral surface of the screw tube 3 through the elongated hole 4 and connects the screw tube 3 and the insertion tube 6. However, the protrusions 12 provided at the connection between the screw tube 3 and the waist tube 2 are provided at a predetermined interval in the circumferential direction, and these protrusions 1
As mentioned above, even if concrete enters the gap between the screw tube 3 and the insertion tube 6 through the elongated hole 4, it will immediately flow downward from the gap between the protrusions 12 and There is no possibility that it will remain in the gap between the screw tube 3 and the insertion tube 6 and harden.

As described above, in the present invention, the insertion tube is connected to the waist tube by the inward protrusion provided at the upper end opening of the screw tube and the plurality of protrusions provided at the connection portion between the screw tube and the waist tube. Of course, it can always be held upright without eccentricity,
The protrusion is fixed by welding on the inner circumferential surface of the connecting portion between the screw tube and the waist tube, so that it spans both the tubes, so that the protrusion is fixed to the screw tube and the waist tube to be fixed by welding. It also serves as a reinforcing member for the connection part with the pipe, and the strength of the connection between the waist pipe and the screw pipe can be increased as a whole.

Moreover, in the present invention, by arranging the plurality of protrusions provided on the inner circumferential surface of the connecting portion between the threaded tube and the waist tube at predetermined intervals in the circumferential direction, the threaded tube can be connected from the long hole of the screw tube to the waist tube. Concrete, etc. that enters the gap between the base pipe and the waist pipe can be flowed downward through the gap created between the protrusions, and there is no risk that the plug pipe will not be able to slide up and down with respect to the waist pipe. be.

In summary, according to the present invention, by rationally arranging the protrusions at specific positions as described above, the strength of the joint between the two pipes is increased, and concrete etc. It is possible to reliably prevent the insertion pipe from becoming stuck in the waist pipe, and at the same time, the insertion pipe is always kept upright without being eccentric with respect to the waist pipe, and the weight of the formwork, etc., or the load of reinforcing bars, concrete, etc. We have now been able to provide a highly stable pipe support that can provide reliable support.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially omitted front view, FIG. 2 is a partially cutaway front view showing the main part enlarged, and FIG. 3 is FIG. 2A. -A sectional view, FIG. 4 is a sectional view of the main part of the lumbar tube, and FIG. 5 is a sectional view taken along line BB in FIG. 2...Waist tube, 3...Screw tube, 4...Long hole, 6...
...Plug-in pipe, 11...Inward protrusion, 12...Protrusion.

Claims (1)

[Scope of utility model registration request] A screw tube with a pair of elongated holes is fixed to the upper end of the waist tube by welding, and an insertion tube is provided with a plurality of adjustment pin holes and whose outer diameter is smaller than the inner diameter of the screw tube and the waist tube. is inserted into the screw tube and waist tube, and a support pin passed through one of the adjustment pin holes through the long hole is engaged with the upper end surface of the adjustment ring screwed into the screw tube, and the In a pipe support that enables fine adjustment in the height direction by rotating an adjustment ring, an inward protrusion having an inner diameter approximately equal to the outer diameter of the insertion tube is provided around the upper end opening of the screw tube, and , a plurality of protrusions are placed on the inner circumferential surface of the connecting portion between the waist tube and the screw tube and at a position facing the lower end of the insertion tube when the support pin is passed through the lowermost position of the adjustment pin hole. The protrusions are arranged at predetermined intervals in the circumferential direction, and are fixed by welding across the waist tube and the screw tube, while the protrusions are arranged at a virtual distance connecting the inner surfaces of the respective protrusions. A pipe support characterized in that the height of the wire is approximately equal to the outer diameter of the insertion pipe.