JPH0215622Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a device for forming holes for lifting and reversing concrete products, which are formed for reversing concrete products for use in waterways, etc., using a lifting and reversing jig. It is.

[Prior Art and Problems] A conventional device for forming holes for lifting and reversing concrete products is a through hole in which a locking rod 2 to which a high nut 1 is screwed is bored in an outer form 3, as shown in Fig. 1. A cylindrical buried member 5, which is inserted into the locking rod 4 and has both ends open from the inside, is fitted onto the tip of the locking rod 2, and in this state is inserted between the inner formwork 6 and the outer formwork 3. The concrete was filled and solidified, and then the locking rod 2 was pulled out using an electric tool.

However, when filling the inside of the mold with concrete, the concrete milk vest gets stuck between the buried member 5 and the locking rod 2 as shown by arrow P.
There was a problem in that an extremely large force was required to pull out the locking rod 2 after the concrete had solidified, and clean holes could not be formed.

[Purpose of the invention] Thus, the present invention has been devised to address these conventional problems, and it is possible to easily pull out the locking bar manually without using an electric tool, and An object of the present invention is to provide an apparatus for forming holes for lifting and reversing concrete products, which prevents concrete milk pest from entering the holes.

[Structure of the invention] The device for forming holes for lifting and reversing concrete products according to the present invention forms holes for lifting and reversing in both side walls of a concrete product formed by filling concrete between an inner formwork and an outer formwork. This is a device for forming holes for lifting and reversing concrete products, which can form holes for lifting and reversing concrete products. an embedded member main body that is located at an end and has a knob that protrudes from both ends of the locking rod main body, and is inserted from the outside into the through hole of the outer form frame; and
A locking piece projecting outward is formed on the outer periphery at approximately the center in the longitudinal direction, and the buried member is fitted into the buried member locking rod from inside the outer form frame with the outer form frame interposed therebetween; It is formed into a plate shape and has a diameter equal to or larger than the inner diameter of the embedded member, and a female threaded part or a male threaded part is formed in the center of one side to be screwed with the tip of the locking rod main body, and the outer formwork and and a closing member that is screwed and fixed to the buried member locking rod so as to close the tip opening of the buried member with the buried member interposed therebetween.

[Example] The present invention will be described below based on an example shown in the drawings.

Drawings 2 to 7 show a first embodiment of the present invention.

The device for forming a hole for lifting and reversing a concrete product in the first embodiment is a buried member 1 shown in FIG.
0 and the buried member locking rod 14 shown in FIGS. 3 and 4.
and a closing member 11 shown in FIG. 5 or 6.

The buried member 10 is made of metal or synthetic resin, has a substantially cylindrical pipe shape with a hollow portion inside, and is open at both ends.

Furthermore, a locking piece 13 that projects outward is bored at a substantially central position in the longitudinal direction of the outer periphery of the buried member 10 in order to further strengthen the integration with concrete. Note that the shape of this locking piece 13 is not limited in any way.

Next, the buried member locking rod 14 is attached to the buried member 10.
A cylindrical locking rod main body 16 inserted into the locking rod main body 16 and a locking rod main body 16 located on the rear end side of the locking rod main body 16.
It consists of a knob 15 protruding from both sides.

The diameter of the locking rod main body 16 is formed to be slightly smaller than the inner diameter of the buried member 10 so as to provide a loose fit to the buried member 10.

Further, a female threaded portion 12 having a smaller diameter than the main body diameter is formed at the tip of the locking rod main body 16.

Note that the buried member locking rod 14 is made of a synthetic resin member or a metal member.

Next, the closing member 11 closes the rear part of one end of the buried member 10, and has a disc shape with approximately the same diameter as the outer diameter of the buried member 10, and has a central portion on one side. A male threaded portion 17 is formed which screws into the female threaded portion 12 at the tip of the locking rod main body 16.

The closing member 11 may be made of metal or synthetic resin.

Note that, as shown in FIG. 6, if a flange piece 20 is provided on the outer periphery of the closing member 11 that protrudes from the side surface on the male threaded portion 17 side, the adhesion between the closing member 11 and the buried member 10 can be further improved. be able to.

By the way, in FIG. 3, reference numeral 3 indicates an outer formwork. A through hole 4 is bored in the outer formwork 3, and a guide member 18 is attached to the outside of the through hole 4.

Next, the procedure for attaching the buried member 10, the buried member locking rod 14, and the closing member 11 will be explained.

First, the embedded member locking rod 14 is inserted into the through hole 4 from the outside toward the inside. Next, after fitting the embedded member 10 into the inserted locking rod 14 between the inner formwork 6 and the outer formwork 3, the locking rod main body 16
The male threaded portion 17 of the closing member 11 is screwed into the female threaded portion 12 at the tip.

Therefore, the closing member 10 is connected and fixed to the buried member locking rod 14 with the outer form 3 and the drilling member 10 interposed therebetween.

In the above state, concrete is filled between the inner formwork 6 and the outer formwork 3. At this time, the closing member 10 and the buried member locking rod 14 are threadedly connected via the guide member 18 and packing 19 with the outer formwork 3 and the buried member 10 interposed therebetween, so that the impact or The vibrator, which is used to improve the filling of concrete, can reliably deal with the swinging of the locking rod due to vibrations, etc.

After the concrete has solidified, the locking rod 14 can be easily removed by turning the knob 15 of the buried member locking rod 14 and pulling it.

Next, a second embodiment of the present invention will be described.

8 to 11 show a second embodiment of the present invention.

In this embodiment, the outer peripheral surface of the closing member 11 is formed as an inclined surface 21, and this closing member 11
One end of the embedded component 10 into which the embedding part 10 is fitted is an expanded part 22.

Therefore, when the closing member 11 and the buried component 5 are fitted together, the inclined surface 21 and the expanded portion 22 are closely attached.

In both of the above-described two embodiments, the female threaded portion 12 is formed at the tip of the locking rod main body 16, and the male threaded portion 17 is formed at the center of one side of the closing member 11 to be screwed into the female threaded portion 12. However, there is no need to limit the mounting position.

That is, there is a male threaded portion 17 at the tip of the locking rod main body 16.
, and the female threaded portion 12 may be formed at the center of one side of the closing member 11.

Next, FIG. 10 shows an embodiment of the packing 19.

As shown, tapered surfaces 23, 23 are formed on the surface of the packing 19 to face each other, and a stepped portion 24 is formed between the tapered surfaces 23, 23.

By forming the tapered surfaces 23, 23 on the surface of the packing 19, when the buried member locking rod 14 is installed, the knob 15 can be attached to the tapered surface 23.
3 and 23, the inner closing member 11 and buried member 10 can be more firmly connected to the outer buried member locking rod 14 with the outer form 3 interposed therebetween.

Furthermore, even if play occurs between the buried member 10 and the outer form 3 or between the buried member 10 and the closing member 11 after the closing member 11 and the buried member locking rod 14 are screwed together, it can be easily fixed. Can be adjusted.

Furthermore, by forming the stepped portion 24 on the surface of the packing 19, the knob 15 is locked to the stepped portion 24 when the buried member locking rod 14 is attached, so that the buried member locking rod 14 rotates and the buried member
0, there is no risk of it coming off the outer formwork 3.

[Effect of the invention] Thus, the present invention has the above-mentioned configuration, and in the device for forming holes for lifting and reversing concrete products according to the present invention, the base end opening of the buried member is closed by the inner surface of the outer form. Since the tip opening is closed with a closing member, concrete milk pest does not enter into the buried member.

In addition, the closing member is screwed and fixed to the buried member locking rod (the tip of the locking rod body) with the outer formwork and the buried member in between, so it is not affected by the impact force when filling with concrete or the concrete. There is no risk that the buried member will move due to vibrations from a vibrator or the like to ensure sufficient filling.

Furthermore, after the concrete has solidified, the buried member locking rods can be easily pulled out manually without using power tools.

Furthermore, according to the present invention, conventional types of buried members can be used as they are, so compatibility with conventional products is good, and manufacturing costs can be reduced.

In addition to the buried parts, the only parts to be buried are the closing parts, which are small parts and extremely low in cost. It can also be said that it is extremely excellent.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a conventional example, Fig. 2 is a schematic diagram of a buried member, Fig. 3 is a schematic diagram showing a buried member locking rod, Fig. 4 is a schematic diagram showing a knob, Fig. 5, 6
The figure is a sectional view showing the closing member, FIG. 7 is a usage state diagram, FIGS. 8 to 11 are respective schematic diagrams showing the second embodiment, FIG. 12 is a perspective view of packing, and FIG.
The figure is a schematic diagram showing the overall usage of the present invention. P...arrow, 1...tall nut, 2...locking rod,
3...Outer formwork, 4...Through hole, 5...Embedded member, 6
... Inner formwork, 10 ... Buried member, 11 ... Closing member, 12 ... Female threaded portion, 13 ... Locking piece, 14 ...
... Buried member locking rod, 15 ... Knob, 16 ... Locking rod main body, 17 ... Male thread, 18 ... Guide member, 19 ... Packing, 20 ... Flange piece,
21... Inclined surface, 22... Expanded portion, 23... Tapered surface, 24... Stepped portion.

Claims (1)

[Scope of Claim for Utility Model Registration] Concrete that can form lifting and reversing holes in both side walls of a concrete product that is formed by filling concrete between an inner form and an outer form with perforated holes. This is a device for forming a hole for lifting and reversing a product, and includes a locking rod body that has a male thread or a female thread at its tip, and is located in the rear end of the locking rod body and has a cylindrical shape as a whole. an embedding member main body that is provided with a knob that protrudes on both sides of the stop rod main body and is inserted into the through hole of the outer formwork from the outside, and has a substantially cylindrical shape and is open at both ends;
A locking piece is formed on an outer periphery approximately at the center in the longitudinal direction and extends outward, and the buried member is fitted into the buried member locking rod from the inside of the outer mold frame with the outer mold frame interposed therebetween; It is formed into a substantially disk shape and has a diameter equal to or larger than the inner diameter of the embedded member, and a female threaded part or a male threaded part is formed in the center of one side to be threaded with the tip of the locking rod main body, and the outer mold A hole for lifting and reversing a concrete product, comprising: a frame and a closing member that is screwed and fixed to the buried member locking rod so as to close the tip opening of the buried member with the frame and the buried member in between. Forming device.