JPH056325Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mounting device for fixing a threaded pipe for an insert having a female thread formed on the inner periphery within a formwork.

(Prior Art) As a conventional technology, there is a structure shown in FIG.

In Fig. 1, 1 is a formwork made of steel plate, and in this formwork 1, a through hole 2 having a slightly larger diameter than the inner diameter of the threaded pipe 3 is formed at a place where the threaded pipe 3 for insert is attached. .

Then, the bolt 4 is inserted into the through hole 2 from the outside of the formwork 1 so that its threaded part 4a projects into the formwork 1, and the threaded part 4a is screwed into the threaded pipe 3 arranged inside the formwork 1. There was one in which the threaded pipe 3 was fixed inside the formwork 1.

(Problems to be Solved by the Invention) The conventional method described above has the disadvantage that the threaded pipe 3 must be attached to the formwork 1 by operating from inside and outside the formwork 1, and the installation work is time-consuming.

In particular, formwork on the ground side or side formwork with obstacles on the outside has the disadvantage that the threaded pipe 3 cannot be attached to these formworks because there is no working space on the outside of the formwork. It was hot.

Further, when removing the formwork 1 from the molded product, the bolts 4 must be removed in advance, which has the disadvantage that this removal requires time and effort.

Furthermore, the through-holes 2 formed in the formwork 1 have a large diameter, which reduces the rigidity of the formwork 1 and has the disadvantage that the drilling operation requires time and effort.

The object of the present invention is to provide a new device for attaching a threaded pipe for insert to a formwork, which eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is constructed as follows.

In other words, a truncated conical mounting seat is provided with the outer diameter of the smaller diameter side approximately corresponding to the outer diameter of the threaded pipe, and a recess is formed in the axial center of the end of the smaller diameter side, and a soft material is used to secure the mounting seat on the larger diameter side. A truncated conical holder having an outer diameter slightly larger than the inner diameter of the threaded pipe is provided, and the end of the large diameter portion of the holder is fitted and supported in the recess of the mounting seat,
The holder and the mounting seat are fastened and fixed to the formwork by a bolt passing through the axis of both from the small-diameter end of the holder.

In addition, a truncated conical mounting seat with the outer diameter of the smaller diameter side approximately corresponding to the outer diameter of the threaded pipe and a recess formed in the axial center of the end of the smaller diameter side is fixed to the inner surface of the formwork, and a soft A truncated cone-shaped holder is provided with the outer diameter of the larger diameter side slightly larger than the inner diameter of the threaded pipe depending on the material, and the holder is supported by fitting into the recess of the mounting seat at the end of the large diameter part. However, the holder may be fastened and fixed to the mounting seat by a bolt passing through the axial center of the holder from the small-diameter end of the holder.

(Function) Since the present invention has the above structure, when the threaded pipe is pushed into the holder, the holder is elastically deformed and press-fitted into the inlet of the threaded pipe, holding the threaded pipe upright and closing the inlet. It will be sealed.

Furthermore, since the holder is an elastic body, it can accommodate variations in the inner diameter of the threaded pipe.

Furthermore, the screw holes formed in the formwork for fixing the mounting seats have a small diameter.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In the drawings, Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the formwork removed from the molded product, and Fig. 3 is a cross-sectional view showing how the beam is attached to the molded product using a threaded pipe. FIG. 4 is a sectional view showing another embodiment.

In FIG. 1, reference numeral 5 denotes a formwork made of a steel plate, in which a small-diameter screw hole 5a is formed at a location where a threaded pipe 6 for insert is to be attached.

The threaded pipe 6 is formed of a metal material into a cylindrical shape with a bottom, an inlet portion 6a having a large diameter and a smooth circular surface, and a female thread 6b formed deep inside.

Reference numeral 7 denotes a mounting seat formed in the shape of a truncated cone from a metal material.The outer diameter of the small diameter side of the upper part is formed to a diameter that approximately corresponds to the outer diameter of the threaded pipe 6. A circular recess 7a having a diameter slightly larger than the diameter of the entrance portion 6a is formed, and a through hole 7b having approximately the same diameter as the aforementioned screw hole 5a is formed in the axial center portion.

8 is a holder made of soft synthetic resin in the shape of a truncated cone, and the outer diameter of the larger diameter side of the lower part is connected to the threaded pipe 6.
The inner diameter of the inlet part 6a is slightly larger than that of the inlet part 6a, and the outer diameter of the small diameter side of the upper part is slightly smaller than the inner diameter of the inlet part 6a. A through hole 8a is formed.

The mounting seat 7 is placed inside the mold 5 through the screw hole 5a of the mold 5, and the lower portion of the holder 8 is fitted and supported in the recess 7a of the mounting seat 7.

Next, after passing the bolt 9 through the through holes 8a and 7b of the holder 8 and the mounting seat 7 from the upper side of the holder 8, the lower part of the bolt 9 is inserted into the screw hole 5a of the formwork 5.
, thereby tightening and fixing the holder 8 and mounting seat 7 to the formwork 5.

Then, the inlet portion 6a of the threaded pipe 6 is press-fitted into the holder 8, and the lower end of the threaded pipe 6 is brought into contact with the upper surface of the mounting seat 7, thereby supporting the threaded pipe 6 upright within the formwork 5. As shown in the figure, a formwork 5 is filled with concrete 10.

In this case, the inlet portion 6a of the threaded pipe 6 is connected to the holder 8.
Since the threaded pipe 6 is sealed tightly, water containing cement will not enter into the threaded pipe 6, and the female thread 6b will not be clogged.

After the concrete 10 has hardened, as shown in FIG. 2, when the formwork 5 is removed, a concrete molded product 11 in which a threaded pipe 6 is inserted is obtained, and the entrance portion 6a of the threaded pipe 6 is opened to the outside. It turns out.

Then, as shown in FIG. 3, a beam 12 is placed on the lower surface of the concrete molded product 11, a bolt 13 is inserted from the lower surface side and screwed into the female thread 6b of the threaded pipe 6, and the beam 12 is attached to the concrete. It is fixed to the lower surface of the molded product 11.

Note that when the holder 8 becomes worn or damaged due to use, the bolt 9 is operated to replace the holder 8 with a new one.

FIG. 4 shows another embodiment.

This one has a screw hole 7 in the axial center of the mounting seat 7'.
c is formed and fixed to the inner surface of the formwork 5 by welding a, a holder 8 similar to that shown in FIG. 8 through the through hole 8a, and then screwed the lower part of the bolt 9' into the screw hole 7c of the mounting seat 7, thereby tightening and fixing the holder 8 to the formwork 5 via the mounting seat 7'. is different from the previous embodiment.

In this way, the screw hole 5 formed in the formwork 5
a can be omitted, and the rigidity of the formwork 5 is further increased.

(Effect of the invention) As is clear from the above explanation, according to the invention, the threaded pipe is press-fitted into a holder made of an elastic material installed in the formwork, so that the work space on the outside of the formwork is Regardless of the presence or absence of threaded pipes, threaded pipes can be easily attached, and the formwork can be easily removed from molded products.

Further, since the holder is elastically deformed to fit and support the threaded pipe, its supporting force is stable even if there are variations in the inner diameter of the threaded pipe. Furthermore, the screw holes formed in the formwork for attaching threaded pipes can be made extremely small in diameter or can be omitted, resulting in effects such as increased rigidity of the formwork.

[Brief explanation of drawings]

Figure 1 is a sectional view showing an embodiment of the present invention, Figure 2 is a sectional view with the formwork removed from the molded product, and Figure 3 is the beam attached to the molded product using a threaded pipe. A sectional view, FIG. 4 is a sectional view showing another embodiment,
FIG. 5 is a sectional view showing a conventional example. 5...Formwork, 5a...Threaded hole, 6...Threaded pipe for insert, 6a...Inlet part, 6b...Female thread,
7... Mounting seat, 7a... Recess, 7b... Through hole, 7c... Screw hole, 8... Holder, 8a... Through hole, 9... Bolt, 10... Concrete, 1
1... Concrete molded product, 12... Beam, 13...
...Bolt, a...welding.

Claims (1)

[Scope of claim for utility model registration] 1. The outer diameter of the small diameter side approximately corresponds to the outer diameter of the threaded pipe,
A truncated conical mounting seat is provided with a recess formed in the shaft center of the end of the small diameter side, and the outer diameter of the large diameter side is made of a soft material to be slightly larger than the inner diameter of the threaded pipe. A platform-shaped holder is provided, the holder is fitted and supported at the end of the large diameter part into the recess of the mounting seat, and the holder and the mounting seat are connected by a bolt passing through the axis of both from the small diameter end of the holder. A device for attaching threaded pipes for inserts to a formwork, characterized by tightening and fixing them to the formwork. 2. Make the outer diameter of the small diameter side approximately correspond to the outer diameter of the threaded pipe,
In addition, a truncated conical mounting seat with a recess formed in the shaft center of the end of the small diameter side is fixed to the inner surface of the formwork, and the outer diameter of the large diameter side is made slightly larger than the inner diameter of the threaded pipe using a soft material. A truncated conical holder is provided, the end of the large diameter part of the holder is fitted and supported in the recess of the mounting seat, and the holder is passed through the axial center of the holder from the end of the small diameter side of the holder. A device for attaching threaded pipes for inserts to formwork, characterized by tightening and fixing them to the mounting seats with bolts.