JPS6039231Y2 - Anchor embedding - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an anchor implant.

Conventionally, in order to transport concrete products, a recess is formed in the concrete product, one end of an anchor is buried in the bottom of the recess, and the head of the anchor is made to protrude.

A hanging fitting called a coupler is hooked onto the head of this anchor to lift and suspend the concrete product.

What is required in such a system is the precise embedding of the anchor into the concrete product.

That is, if the anchor is deeply embedded in the concrete product or embedded crookedly, the coupler cannot be hooked onto the anchor, and the required strength cannot be obtained.

Conventionally, when embedding an anchor in a concrete product, as shown in Fig. 6, a cylindrical cavity was formed in a hemispherical embedding tool a fixed to a formwork f, and the anchor C standing up in the cavity was shaped like a ring. It was supported by an elastic body d, and one end of the anchor C was embedded by pouring concrete e into the formwork f.

After the concrete e has hardened, it can be removed from the formwork and the embedded tool a
As a result, a recess is formed on the surface of the concrete product, and the head of the anchor C protrudes into the recess.

A problem with such an embedding tool is that the elastic body d supporting the anchor C does not firmly clamp the anchor head, so that the anchor C is bent and embedded.

Furthermore, when applying high frequency vibration to the formwork using a vibrator, there is a drawback that the elastic body d floats up.

Other hemispherical embedding devices have been developed using elastic materials such as rubber, but these embedding devices require work to tighten screws to support the anchors on the outside of the formwork, which requires work on the bottom of the formwork. In this case, the entire formwork must be lifted up and the worker must work from below, which is both troublesome and dangerous.

The anchor embedding device according to this invention was made to improve the above-mentioned drawbacks, and the purpose is to provide an anchor embedding device that can accurately and firmly erect the anchor and is easy to work with. shall be.

Next, an example will be explained.

The anchor embedding device according to this invention includes a clamping body 1 and a pedestal 2.
Constructed by

The clamping body 1 is made of an elastic member such as rubber or synthetic resin, and clamps the head of the anchor 3.

The clamping body 1 is formed into a circular truncated cone shape with a surface 16 having a larger diameter than the ground surface 17, and is divided into two parts along the center line to form two divided bodies 1a and la.

A stepped depression 18 is formed in the center of each opposing mating surface of each divided body 1a.

Further in the center of the recessed portion 18, a groove-shaped recessed portion 11 having a semicircular cross section, at least a portion of which is continuous with the large-diameter side circular surface 16 and has a larger diameter than the outer periphery of the anchor 3, is provided in the center line direction.

The concave portion 11 has a grip portion 12 having an inner diameter that is the same as the outer diameter of the neck portion 32 of the anchor 3, a constriction portion 13 that has an inner diameter slightly larger than the outer diameter of the neck portion 32, and an inner diameter that is the same as the outer diameter of the head portion 31 of the anchor 3. A contact portion 14. and a contraction part 15 having an inner diameter slightly larger than the outer diameter of the head 31 of the anchor 3,
It is formed continuously from the large diameter side circular surface 16.

The pedestal 2 is formed by forming a recess in the concrete product, fits the aforementioned clamping body 1, and supports the anchor 3 held by the clamping body 1.

The pedestal 2 has a truncated conical outer shape, and has a penetrating space 21 formed on two parallel surfaces.

The space 21 is formed into a truncated conical shape in which the inner diameter of the opening 21a on one side is larger than the inner diameter of the opening 21b on the other side.

A ring-shaped inner flange 22 is formed on the inner periphery of the opening 21 with the smaller inner diameter of the space 21 of the pedestal 2, and the ring-shaped inner flange 22 is formed on the outer periphery, the thickness becoming smaller as it goes outward. An outer flange 23 is formed.

The inclination angle α of the outer surface of the clamping body 1 with respect to the center line and the inclination angle β of the inner surface of the pedestal 2 with respect to the center line are the same.

Further, the outer diameter of the circular surface 16 on the large diameter side of the holding body 1 is slightly larger than the inner diameter of the large diameter side opening 21a of the space 21 of the pedestal 2, and the outer diameter of the circular surface 17 on the small diameter side of the holding body 1 is , pedestal 2
The inner diameter of the small-diameter opening 21a of the space 21 is slightly larger than the inner diameter of the small-diameter opening 21a.

The state of use of the anchor embedding device having the above configuration will be explained.

The tip of the anchor 3 is held by the holding body 1.

That is, the tip ends are fitted into the recesses 11, 11 of the two divided bodies 1a, 1a, and the anchor 3 is sandwiched between the two divided bodies 1a, 1a.

At this time, since depressions 18.18 are formed on the opposing mating surfaces of the two divided bodies 1a and la, the two divided bodies 1a and l
There is a space between a.

Moreover, since the constricted parts 13, 15 each have a larger diameter than the neck part 329 and the head part 31 of the anchor 3, a space is formed around the outer periphery of the anchor 3, respectively.

The clamping body 1 is press-fitted into the space 21 of the pedestal 2 attached to the formwork floor 4.

Since the inclination angle α of the outer surface of the clamping body 1 and the inclination angle β of the inner surface of the base 2 are the same, the clamping body 1 can be fitted into the space 21 up to a certain length without the need for press-fitting.

However, the outer diameter of the circular surface 16, 17 of the holding body 1 is the space 21.
Since the openings 21a and 21b are slightly larger than the openings 21a and 21b, the entire clamping body 1 can be fitted into the space 21 by press-fitting beyond that and contracting the outer shape.

Inside the clamping body 1 there is a recessed part 18.18 and a constricted part 13.15.
A gap is formed by this, and the outer shape contracts into the internal gap by the amount that the outer shape has contracted, and the anchor 3 is firmly clamped by being pressed against the outer periphery of the anchor 3.

Further, the outer surface of the clamping body 1 comes into pressure contact with the inner surface of the space 21, so that the clamping body 1 is firmly fixed within the space 21.

Therefore, even if concrete is poured into the formwork and high-frequency vibration is applied by a vibrator, the anchor 3 will be firmly erected vertically by the clamping body 1, and the clamping body 1 will not be lifted out of the space 21 of the pedestal 2 due to vibration. , it becomes possible to embed the anchor 3 accurately at a desired depth and position.

Pedestal 2 can be created by removing the hardened concrete product from within the formwork.
As a result, a recess is formed on the surface of the concrete product, and the anchor 3 whose head protrudes by a desired height is embedded in the bottom of the recess.

Since the pedestal 2 has flanges 22 and 23 protruding, a tapered part is formed between the concave part formed in the concrete product and the surface of the concrete product formed by the formwork floor 4, so that concrete chipping is prevented. It is well-chosen without being messy.

Furthermore, as described above, since the space 21 of the pedestal 2 passes through the space 21 vertically, even if concrete enters the space 21, the concrete can be easily removed.
There is no problem with fitting.

The anchor embedding device according to this invention has the above-mentioned configuration, has a truncated conical shape, has two divided bodies, and has a recessed part and at least a part on the surface of the divided body. A clamping body with a recessed part with a larger diameter than the anchor, and a pedestal having a truncated cone-shaped space, the outer diameter of the clamping body and the inner surface of the pedestal space are made to have the same inclination angle, and the outer diameter of the clamping body is lower than the pedestal. The diameter is made slightly larger than the inner diameter of the space, so when the clamping body holding the anchor is press-fitted into the pedestal space, the clamping body presses against the side surface of the space, contracts into the gap formed inside, and presses against the anchor. do.

Therefore, the clamping body is firmly fitted into the pedestal space, and the clamping body firmly clamps the anchor, so that even if vibration is applied, the clamping body will not come off the pedestal or the anchor will fall. Never happened.

[Brief explanation of the drawing]

Fig. 1 is a perspective development view of one embodiment of the anchor embedding device according to this invention, Fig. 2 is a side view of one embodiment of the clamping body, and Fig. 3 is a side view of one embodiment of the clamping body.
The figure is a cross-sectional view taken along the line A-A, Figure 4 is a partially cutaway side view of the pedestal, Figure 5 is a vertical cross-sectional view of the anchor in an upright position, and Figure 6 is a vertical cross-section of a conventional anchor embedding device in use. It is a diagram. 1... Clamp body, la, la... Divided body, 2... Bench pedestal, 3... Anchor, 4...
・Formwork floor surface, 11... curved recess, 12... gripping part, 13... contraction part, 14... contact part,
15... Contraction part, 16.17... Circular surface, 21... Space part, 21a, 21b...
...Opening, 31...Head, 32...
・Neck.

Claims (1)

[Scope of utility model registration request] An anchor embedding device that fixes the anchor to a formwork and erects it, then embeds the anchor in a concrete product, has a circular surface that has a truncated conical shape with a larger diameter than the other surfaces, and is divided into two along the center line. A recessed part is formed in the center of the opposing mating surfaces of the two divided parts, and further in the center of the recessed part, there is a concave part that is continuous with the large-diameter circular surface and at least partially A clamping body with a groove-like recess with a substantially semicircular cross section that has a larger diameter than the outer periphery of the anchor, and a truncated conical space where the inner diameter of the opening on one side is larger than the inner diameter on the other side. The angle of inclination of the outer surface of the holding body is the same as the angle of inclination of the inner surface of the space of the pedestal, and the outer diameter of the circular surface on the large diameter side of the holding body is set to the side of the large diameter side of the space of the pedestal. An anchor embedding device characterized in that the outer diameter of the circular surface on the small diameter side of the holding body is slightly larger than the inner diameter of the opening on the small diameter side of the space of the pedestal.