JPH026162Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a temporary insert that temporarily fixes the bolt fixing insert to the inner surface of the formwork before concrete pouring when installing embedded bolts in a concrete structure. This relates to a locking device.

Prior art and its problems Conventionally, in order to temporarily fasten the above-mentioned insert to a concrete formwork, as shown in FIG. 52 itself, passing it through the through hole 52 from the outside of the formwork 51, and screwing it into the male threaded part 55 of the insert 54 arranged on the inner surface of the formwork 51 was common. However, in this case, the bolt through holes 52 of the formwork 51 need to have a large diameter to allow the embedded bolts 53 to pass through, and therefore, in order to reuse the formwork, it is necessary to repair the through holes to close them. It was hot.

This idea was made in view of the above-mentioned circumstances, and is a temporary fixing device for inserts designed to keep the repairs of the formwork to the minimum necessary and allow the repaired formwork to be reused as is. The purpose is to provide

Throughout this specification, the "tip" direction refers to the screwing direction of a small diameter bolt for temporary fixing.
The proximal direction refers to the opposite direction. In addition, regarding the inside-outside relationship, the side where concrete is poured is referred to as the inside, and the opposite direction is referred to as the outside, based on the formwork. Furthermore, the term "formwork" is used to include metal forms, wooden forms, etc.

Means for solving the problem As shown in the attached FIGS. 1 and 2, the insert temporary fixing device according to the present invention has a screw on the tip side of the large-diameter female screw portion 2 of the insert 1 for the embedded bolt.
A small diameter female threaded portion 3 having a smaller diameter than this is provided,
Insert positioning members 6 and 16 having small diameter holes 5 and 15 for bolt penetration are provided in the proximal opening 4 of the large diameter female threaded portion 2, and the small diameter bolt 8 for temporary fixing passing through the formwork 7 is inserted into the small diameter It is passed through the holes 5 and 15 and screwed into the small diameter female threaded portion 3.

The small-diameter female threaded portion 3 can be formed by screwing a male threaded member 14 having the small-diameter female threaded portion 3 in the axial center into the large-diameter female threaded portion 2 provided in a penetrating manner in the insert 1, or by screwing the male threaded member 14 having the small-diameter female threaded portion 3 in the axial center, or by inserting the large The male screw member 14 having the small diameter female screw portion 3 is integrally formed within the female screw portion 2, thereby providing the female screw portion 2 with a large diameter.

The insert positioning members 6 and 16 are made of metal or plastic plates, and the outer surface thereof has
Preferably, the packing 1 has small holes 9 and 19 that are concentric with the small diameter holes 5 and 15 and have smaller diameters.
0 and 20 are provided. Therefore, the small hole 9,
By closely fitting the small diameter bolt 8 into the small diameter bolt 19, slag is prevented from entering the large diameter female threaded portion 2 through the gap between the small diameter holes 5, 15 and the small diameter bolt 8 during concrete pouring.

Further, a tapered concave surface 11 is provided between the large diameter female threaded portion 2 and the small diameter female threaded portion 3. Therefore, the tip of the small diameter bolt 8 is the large diameter female threaded part 2.
From there, it is guided by the tapered concave surface 11 and reaches the small diameter female threaded portion 3.

Function The small diameter bolt 8 for temporary fixing has a small diameter that fits the small diameter female screw part 3, so the bolt through hole 12 that is made in the formwork 7 in order to pass the bolt 8 through it.
It may also be of small diameter.

Further, the bolt 8 is connected to the opening 4 of the large-diameter female threaded portion 2.
The insert 1 is passed through the small diameter holes 5, 15 of the insert positioning members 6, 16 provided in the insert positioning members 6, 16, and is screwed into the small diameter female threaded portion 3, so that the insert 1 is temporarily fixed accurately at the required position on the inner surface of the formwork 7, and temporarily After stopping, the position will not shift.

Embodiments Next, this invention will be specifically explained with reference to illustrated embodiments.

Example 1 In Fig. 1, the embedded bolt insert 1
A large-diameter female threaded portion 2 is provided in a penetrating manner, and a male threaded member 14 having a small-diameter female threaded portion 3 in the axial direction and a tapered concave surface 11 on the base end side of the female threaded portion 3 is screwed into the distal end portion 13 thereof. It is. Further, an opening 4 having a larger diameter is provided at the base end of the large-diameter female thread 2, and a fitting protrusion 6a of the insert positioning member 6 is fitted into the opening 4, and a flange 6b of the member 6 is inserted into the opening 4. It is sandwiched between the base end surface of the insert 1 and the inner surface of the formwork 7. The insert positioning member 6 has a small diameter hole 5 for passing a bolt through it at a position corresponding to the small diameter female screw portion 3.

A packing 10 is disposed on the outer surface of the fitting protrusion 6a, and a small hole 9 that is concentric with the small diameter hole 5 and smaller in diameter than the small hole 5 is bored in the packing 10.

Small-diameter bolt through-holes 12 are drilled in the formwork 7 at predetermined positions, and small-diameter bolts 8 for temporary fixing are passed through the holes 12 from the outside, passing closely through the small holes 9 of the packing 10, and then It passes through the small-diameter hole 5 of the insert positioning member 6 and is guided by the tapered concave surface 11 to reach the small-diameter female threaded portion 3 and is screwed into the female threaded portion 3 .

In this way, the insert 1 is reliably temporarily fixed at a predetermined position on the inner surface of the formwork 7.

Embodiment 2 In this embodiment, the insert positioning member 16 is disposed within the opening 4, and the fitting protrusion 16 of the member 16
a is fitted into the large-diameter female threaded portion 2. Also, a packing 20 having a small hole 19 is disposed on the outer surface of the fitting protrusion 16a.

The other configurations are the same as those of the first embodiment.

Effects of the invention As described above, according to this invention, on the tip side of the large diameter female threaded portion 2 of the embedded bolt insert 1,
A small diameter female threaded portion 3 having a smaller diameter than this is provided,
Insert positioning members 6 and 16 having small diameter holes 5 and 15 for bolt penetration are provided in the proximal opening 4 of the large diameter female threaded portion 2, and the small diameter bolt 8 for temporary fixing passing through the formwork 7 is inserted into the small diameter Since it is passed through the holes 5 and 15 and screwed into the small-diameter female threaded portion 3, the small-diameter bolt 8 for temporary fixing only needs to be of a small diameter that fits the small-diameter female threaded portion 3; The bolt through holes 12 drilled in the formwork 7 may also have a small diameter. Therefore, repairs to the formwork 7 can be kept to the minimum necessary and the repaired formwork 7 can be reused as is. Thus, according to the temporary fixing device of this invention, the cost of concrete construction can be reduced by simplifying the work.

Further, the small diameter bolt 8 is inserted into the insert positioning members 6 and 16 provided in the opening 4 of the large diameter female threaded portion 2.
Since the insert 1 is passed through the small diameter holes 5 and 15 of the mold and screwed into the small diameter female threaded part 3, the insert 1 can be temporarily fixed accurately at the required position on the inner surface of the formwork 7, and even after temporary fixing, there is no possibility of displacement of the temporary fixing position. can be prevented.

[Brief explanation of drawings]

1 and 2 are longitudinal sectional views showing the insert temporary fixing devices of Examples 1 and 2 of this invention, and FIG. 3 is a vertical sectional view showing the conventional temporary insert fixing device. 1...insert, 2...large diameter female thread, 3...
...Small diameter female threaded portion, 4...Opening, 5, 15...Small diameter hole, 6, 16...Insert positioning member, 7
... Formwork, 8 ... Small diameter bolt, 9, 19 ... Small hole, 10, 20 ... Packing, 11 ... Tapered concave surface, 12 ... Bolt through hole.

Claims (1)

[Claims for Utility Model Registration] 1. A small-diameter female threaded portion 3 having a smaller diameter is provided on the distal end side of the large-diameter female threaded portion 2 of the embedded bolt insert 1, and a proximal opening 4 of the large-diameter female threaded portion 2 is provided. Insert positioning members 6 and 16 having small diameter holes 5 and 15 for bolt penetration are provided, and small diameter bolts 8 for temporary fixing that have passed through the formwork 7 are passed through the small diameter holes 5 and 15 to form the small diameter female screws. A temporary fixing device for an insert for fixing an embedded bolt in a concrete formwork, which is screwed into part 3. 2 On the outer surface of the insert positioning members 6, 16,
Packing 10, 20 having small holes 9, 19 concentric with the small diameter holes 5, 15 and smaller in diameter
The device according to claim 1 of the utility model registration claim, wherein the device is provided with: 3. The device according to claim 1 or 2 of the utility model registration, wherein a tapered concave surface 11 is provided between the large diameter female threaded portion 2 and the small diameter female threaded portion 3.