JPH0530886Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a formwork for forming concrete U-shaped grooves, boxes, etc., and in particular, the invention relates to a formwork for forming concrete U-shaped grooves, boxes, etc. The present invention relates to a support device.

(Prior Art) As a conventional art, there is one shown in FIGS. 5 and 6.

In Fig. 5, 1 is a U made of sheet metal material.
This is a formwork for a groove, and a U-shaped inner frame 3 is fixed upside down on the upper surface of a base 2, and an outer frame 4 is placed on both left and right sides of this inner frame 3, and the inner frame 3 and outer frame 4 are End plates 5 are arranged upright at both ends of the longitudinal direction and attached to the base 2, thereby forming a molding chamber 6 with an open top surface.
form.

Each of the outer frames 4 is attached by a hinge 7 so as to be rotatable outward.

An insert metal fitting support device 8 is attached to each of the above-mentioned outer frames 4.

This insert metal support device 8 is designed as shown in FIG.

That is, through holes 9 are formed in the vertical center and both ends of the outer frame 4 in the longitudinal direction, and bolts 10 are fitted into each through hole 9 from the outside, and the tip 1 of the threaded portion is fitted into each through hole 9 from the outside.
0a protrudes into the molding chamber 6, and this tip 10a
A metal insert 11 is screwed into and tightened and fixed.

The insert 11 has a threaded hole 11a formed in the shaft center to which the bolt 9 is screwed, has a blind tip (left end), and has a length L2 slightly smaller than the width L1 of the molding chamber 6. It is formed into.

(Problems to be Solved by the Invention) In the conventional device described above, the insert fitting 11 is screwed into the tip end 10a of the bolt 10 inserted into the outer frame 4, so it is difficult to attach the insert fitting 11 to the bolt 10. In addition to requiring a lot of work, when rotating each outer frame 4 outward in order to release the molded product, each bolt 10 must be loosened and removed from each outer frame 4, which makes the mold release work difficult. There was a drawback that required a lot of work.

The object of the present invention is to obtain a novel insert support device for a formwork that eliminates the above-mentioned drawbacks.

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

That is, a through hole is formed through one wall of the formwork facing each other, a nut is fixed to protrude outward from the periphery of the through hole in one wall, and the tip is formed with a small diameter and the base with a large diameter. At the same time, a support shaft with a thread formed on the outer periphery of a large diameter is provided, and this support shaft is screwed into a nut so that its tip and base tips protrude into the formwork, and the metal material is An insert metal fitting is provided on the bottom wall of a bottomed cylindrical main body, in which a flexible spacer that protrudes outward in the axial direction and has a small diameter protruding end is fixed. The spacer is configured to be detachably loosely fitted into the tip end of the support shaft and the tip end of the base, and the projecting end of the spacer is pressed into contact with the inner surface of the other wall of the formwork.

It is effective to form the spacer in a conical shape from a soft plastic material, and to form a small-diameter projection on the bottom surface, which is press-fitted into the bottom wall of the metal insert.

(Function) Since the present invention has the above configuration, the support shaft is screwed to one wall via a nut, and when the insert fitting is fitted to this support shaft, the entrance portion of the insert fitting It fits into the base of the support shaft with a small gap, and its deep inner part fits into the tip of the support shaft with a large gap.

This increases the axial support range of the insert metal fittings by the support shaft, and when assembling the formwork,
The metal insert will not accidentally fall off the support shaft, and the metal insert will be held substantially coaxially with the support shaft at the base of the support shaft.

When the formwork is assembled in this state, that is, when one wall is brought close to the other wall, the protruding end of the spacer will come into contact with the other wall over a small area, and the insert will be sandwiched between one wall and the other wall. and will be strongly supported.

Furthermore, when one wall is rotated outward when the molded product is released from the mold, the support shaft slides within the insert and is removed outward. In this case, since the tip of the support shaft fits into the insert with a large gap, it can be smoothly removed without being caught by the insert.

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

In the drawings, FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is a sectional view of an insert fitting.

Note that the parts in Figure 1 with the same symbols as in Figure 5 are the same as those in Figure 5.
Since it has substantially the same structure as the one in the figure, its explanation will be omitted.

In Fig. 1, 15 indicates each outer frame 4, 4a, 4b.
This is an insert support device installed at the center in the vertical direction and at both ends in the longitudinal direction.

Both of the insert fitting support devices 15 have the same structure, and the one attached to the right outer wall 4a will be described in detail with reference to FIGS. 2 and 3.

That is, as shown in FIG. 2, a nut 16 is welded and fixed outward to the periphery of a through hole 9 formed through the right outer frame 4a, and the support shaft 1 is attached to this nut 16.
7 from the outside.

This support shaft 17 has a head 17a on the right end shaped like a hexagonal column, a base 17b with a large diameter, a tip 17c with a small diameter, and a thread formed on the outer periphery of the base 17b. screw-fit into the nut 16 from the left end 17b of the base 17b.
-1 and the tip portion 17C are made to protrude into the molding chamber 6. This amount of protrusion is made slightly smaller than the width L1 of the molding chamber 6.

Left end 17b-1 and tip 1 of the support shaft
Fit the insert fitting 18 to 7c.

This insert fitting 18 is shown in FIGS. 2 and 3.
As shown in the figure, it consists of a metallic main body 19 and a spacer 20 made of soft plastic.

The main body 19 has the left end portion 17b-
A fitting hole 19a having a slightly larger diameter than the outer diameter of the fitting hole 19a is formed, and a shallow lead groove 19b is formed in the peripheral wall of the fitting hole 19a, the left end is closed by a bottom wall 19c, and the axis of this bottom wall 19c is Small diameter engagement hole 19 in the center
It forms a d.

Further, the spacer 20 has a protruding end portion 20a.
(left end) is formed into a conical shape with a small diameter,
A small-diameter protrusion 20b is formed protruding rightward at the axial center of the bottom (right side), and the protrusion 20b is press-fitted into the engagement hole 19d formed in the bottom wall 19c of the main body 19 to form the spacer 20 as the main body. It is integrally fixed to 19.

In addition, the length L3 of the metal insert 18 is:
It is formed slightly longer than the width L1 of the molding chamber 6.

Next, the functions and effects of the above embodiment will be explained.

First, the support shafts 17 are screwed into nuts 16 fixed to each outer frame 4, and in this state, each outer frame 4 is rotated outward as shown by the imaginary line in FIG. The insert fitting 18 is fitted into the inner end portions of the tip portion 17c and the base portion 17b.

Then, the entrance part of the insert fitting 18 fits into the inner end (left end 17b-1) of the base 17b of the support shaft 17 with a small gap, and the inner deep part fits into the tip 17c of the support shaft 17. As a result, the axial support range of the insert fitting 18 by the support shaft 17 is increased, and the outer frame 4 is fitted with a large gap.
When assembling, the insert fitting 18 is attached to the support shaft 17.
In addition to preventing it from accidentally falling off, the support shaft 1
The insert fitting 18 is held substantially coaxially with the support shaft 17 at the inner end of the base portion 17 of the support shaft 17 .

Next, the outer frame 4 is assembled, that is, the outer frame 4 is assembled with the inner frame 3.
When approached, the protruding end 20a of the spacer 20
is in contact with the inner frame 3 in a small area, and the insert fitting 18
is firmly supported by being sandwiched between the outer frame 4 and the inner frame 3.

In this state, the molding chamber 6 is filled with fresh concrete, which is hardened and molded.

In this case, the protruding end 20a of the spacer 20 is in contact with the inner frame 3, and although this abutting part is no longer filled with fresh concrete, the protruding end 20a
Since the area is small, it does not affect the quality of the molded product.

Next, when each outer frame 4 is rotated outward in order to release the molded product, the support shaft 17 slides within the insert fitting 18 and is removed outward. At this time, the tip 17c of the support shaft 17 moves in an arc around the hinge 7, but since the tip 17c is fitted to the insert fitting 18 with a large gap, the insert fitting 18 This allows for smooth removal without getting caught in the fitting hole 19a.

As shown in FIG. 4, the spacer 20 according to the present invention has a large-diameter, cylindrical cap 20c formed at the base of a small-diameter, conical projecting end 20a, and this cap 20c is connected to the inner end of the main body 19. It may also be press-fitted. In this case, subject 1
The engagement hole 19d formed in the bottom wall 19a of 9 is omitted.

(Effects of the invention) As is clear from the above explanation, the present invention has an insert fitting that is removably fitted to a support shaft fixed to one wall of the formwork, and a small-diameter and flexible insert fitting attached to the tip. Since the spacer is brought into pressure contact with the other wall of the formwork so that the insert fitting is held between both walls of the formwork, the insert fitting can be quickly and accurately attached to the formwork.

In addition, since the tip of the support shaft is formed with a small diameter,
This has the effect that the formwork can be disassembled quickly and smoothly after molding.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part thereof, Fig. 3 is a sectional view of the metal insert, and Fig. 4 is a main part of the metal insert showing another embodiment. 5 is a sectional view showing a conventional example, and FIG. 6 is an enlarged sectional view of the main part thereof. 1...Formwork, 2...Base, 3...Inner frame, 4...
... Outer frame, 5 ... End plate, 6 ... Molding chamber, 7 ... Hinge, 9 ... Through hole. 15...Insert fitting support device, 16...Nut, 17...Support shaft, 17a
...Head, 17b...Base, 17b-1...Left end, 17c...Tip, 18...Insert fitting, 19...Main body, 19a...Fitting hole, 19b...
...Lead hole, 19c...Bottom wall, 19d...Locking hole, 20...Spacer, 20a...Protruding end, 2
0b...protrusion, 20c...cap.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A through hole is formed in one wall of the formwork facing each other, a nut is fixed protruding outward from the periphery of the through hole in one wall, and the tip part has a small diameter. The base is formed with a large diameter, and a support shaft is provided with a thread formed on the outer periphery of the large diameter, and this support shaft is screwed into a nut, and the tip and the tip of the base are inserted into the formwork. An insert fitting is formed by fixing a flexible spacer, which projects outward in the axial direction and has a small diameter projecting end, to the bottom wall of a bottomed cylindrical main body made of a metal material. The mold is characterized in that the insert fitting is detachably loosely fitted to the tip of the support shaft and the tip of the base, and the protruding end of the spacer is pressed against the inner surface of the other wall of the mold. Insert metal fitting support device for the frame. 2. The spacer according to claim 1, wherein the spacer is formed in a conical shape from a soft plastic material, and has a small diameter projection formed on the bottom surface, and this projection is press-fitted into the bottom wall of the insert fitting. Insert metal fitting support device.