JP2798663B2 - Hanging fittings for concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product hanging bracket used for operations such as storage, transportation, and laying of a concrete product such as a U-shaped groove.

[0002]

2. Description of the Related Art In a conventional concrete product hanging metal fitting disclosed in Japanese Utility Model Laid-Open No. 60-137781, a biasing coil spring is attached to the tip of a round rod body of an insertion metal fitting, and a side wall of the round rod body is provided. A retaining protrusion is provided at the tip, and a groove through which the retaining protrusion passes is provided in the inner wall surface of the pipe of the embedded fitting into which the round bar is inserted and removed, and the retaining protrusion protruding from the groove is movable. A huge chamber inside the pipe tip,
At the base end bottom surface of the huge chamber perpendicular to the axis of the pipe, there is provided a cutout in which the retaining projection is engaged and disengaged, which is dropped in the axial direction.

However, in this hanging bracket, the coil spring for biasing the slide of the round bar is mounted by being fitted into a blind hole formed in the center of the tip of the round bar, so that a large spring is used. If it cannot be used and it is bent or lost during use, it causes troubles such as insertion into a pipe becomes impossible. In addition, the notch is provided at a 90-degree interval from the groove, and in order to engage the retaining projection with the notch, the round bar must be rotated exactly 90 degrees after insertion into the pipe. In addition, the operability was poor.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to limit the diameter of the coil spring, so that the insertion fitting and the embedding fitting can be connected with a sufficiently large force, and the connection and disconnection of the embedding fitting and the insertion fitting can be achieved. It is an object of the present invention to provide a concrete product hanging bracket with good operability.

[0005]

Means for Solving the Problems Hereinafter, a description will be given using reference numerals in the accompanying drawings. The hanging bracket for concrete products according to the first aspect of the present invention is composed of an embedding bracket 3 and an insertion bracket 2, and is inserted. The coil spring 4 for sliding bias is fitted to the base end of the round bar 2a of the metal fitting 2, and the round bar 2
The retaining protrusions 6a and 6b are provided at the front end of the side wall of a. Grooves 3b, 3c through which retaining protrusions 6a, 6b pass are provided in the axial direction on the inner wall surface of the pipe 3a of the embedded metal fitting 3, into which the tip side portion of the round bar 2a is inserted and removed, and protrudes from the grooves 3b, 3c. A huge chamber 3f in which the retaining protrusions 6a and 6b can move is provided in the distal end of the pipe 3a. At the base end bottom surface of the expanding chamber 3f perpendicular to the axis of the pipe 3a, cutouts 3d and 3e are formed by dropping in the axial direction into and out of which the retaining projections 6a and 6b are engaged and disengaged. , 3e are provided on the bottom surface of the proximal end of the enormous chamber 3f.

According to the second aspect of the present invention, the bottom surface of the enlarged chamber 3f is inclined from the distal ends of the grooves 3b, 3c toward the inner bottom surfaces of the notches 3d, 3e. Combination guide surfaces 3g, 3h and engagement guide surface 3
Release guide surfaces 3i and 3j that are inclined from the tips of g and 3h toward the grooves 3b and 3c are provided in a mountain shape.

[0007] In use, the embedding fitting 3 is embedded and fixed at a required location when the concrete product 1 is formed.
When the concrete product 1 is to be lifted, the round bar 2a of the insertion fitting 2 is inserted into the pipe 3a of the embedding fitting 3, and the round bar 2a is pressed against the sliding bias of the coil spring 4 in the pull-out direction. Let go. At this time, the round bar 2a
The retaining protrusions 6a, 6b move within the grooves 3b, 3c of the pipe 3a. When the round bar 2a is inserted to a predetermined depth,
The retaining projections 6a, 6b pass through the grooves 3b, 3c and enter the enormous chamber 3f. When the round bar 2a is rotated in a predetermined direction at this stage, the retaining projections 6a and 6b move to the notches 3d and 3e along the engagement guiding surfaces 3g and 3h by the urging of the coil spring 4.

In the course of this movement, the round bar 2a slightly rotates,
The retaining projections 6a and 6b are deeply engaged with the notches 3d and 3e. Retaining projections 6a, 6b and notches 3d, 3
The engagement state of e is accurately held by the urging of the coil spring 4, and the embedded fitting 3 and the insertion fitting 2 are securely connected and fixed. A lifting operation is performed by hanging a wire or the like on the insertion fitting 2. After this operation, in order to remove the insertion fitting 2, the round bar 2 a is pushed in against the bias of the coil spring 4, and the retaining projections 6 a, 6 b are notched 3.
d, 3e, and the retaining projections 6a, 6b
The round bar 2a is turned until it comes to the positions b and 3c, and then it is extracted from the pipe 3.

According to the second aspect of the present invention, when the concrete product 1 is to be lifted, the round bar 2a of the insertion metal fitting 2 is inserted into the pipe 3a of the embedding metal fitting 3. Push the stopper projections 6a, 6b until they protrude from the grooves 3b, 3c of the pipe 3a. When the round bar 2a is rotated in a predetermined direction until the retaining projections 6a, 6b cross the ridgeline between the release guide surfaces 3i, 3j and the engagement guide surfaces 3g, 3h, the coil spring 4 biases the removal. The stop projections 6a, 6b are engaged with the engagement guiding surfaces 3g, 3
Because of the sliding along h, the round bar 2a further rotates slightly, and the retaining projections 6a and 6b are deeply engaged with the notches 3d and 3e.

In order to remove the insertion fitting 2 from the embedded fitting 3, the round bar 2a is pushed in against the bias of the coil spring 4, and the retaining projections 6a, 6b are released by the release guide surfaces 3i, 3.
The round bar 2a is rotated until it exceeds the association ridge line between j and the engagement guiding surfaces 3g and 3h. When this position is reached, the retaining projections 6a, 6b slide along the release guide surfaces 3i, 3j due to the bias of the coil spring 4, so that the round bar 2a further rotates slightly, and the retaining projections 6a, 6b. Are grooves 3b, 3
c. Thereby, the round bar 2a can be pulled out from the pipe 3a.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIGS. 1 to 7, an eye-shaped fitting 9 is fixed to a base end of a round bar 2a, and a lifting ring is provided at an intermediate portion of the round bar 2a. A mounting bracket 8 equipped with the bracket 8 is rotatably and slidably mounted. The spring receiving plate 5 fitted to the base end of the round bar 2a contacts the base end surface of the embedded metal fitting 3. When carrying out the lifting work, a wire or the like is alternatively applied to the eye fitting 9 or the lifting ring 8. As shown in FIGS. 2 and 3, a pair of notches 3 d and 3 e are provided on the base bottom surface of the enlarged chamber 3 f of the embedded metal fitting 3 so as to oppose each other in diameter. Notch 3d,
The groove 3e and the grooves 3b and 3c are arranged at intervals of 90 degrees. Between the grooves 3b and 3c and the notches 3d and 3e,
g and 3h are provided in a pair so as to face each other on the diameter. The engagement guide surfaces 3g and 3h are formed as single-sided inclined surfaces inclined from the tips of the grooves 3b and 3c toward the inner bottom surfaces of the cutouts 3d and 3e. The retaining projections 6a and 6b of the round bar 2a that have come out of the grooves 3b and 3c can be slightly rotated by rotating the round bar 2a in a predetermined direction as shown in FIG.
g and 3h to move deeply into the notches 3d and 3e, respectively.

In another embodiment shown in FIGS. 8 and 9, two sets of engaging guide surfaces 3g and 3h are provided on the base bottom surface of the bulging chamber 3f of the embedding fitting 3 so as to face each other in diameter. ing. That is, the engagement guide surfaces 3g and 3h are provided on all of the four arc-shaped end surfaces. Each of the two engagement guide surfaces 3g and 3h is formed as a single-flow slope inclined toward the inner bottom surfaces of the cutouts 3d and 3e.
Therefore, the round bar 2 coming out of the grooves 3b and 3c of the pipe 3a
The retaining protrusions 6a and 6b of the a are moved along one of the two engagement guiding surfaces 3g and 3h as shown in FIG. 3
d and 3e, respectively.

In the embodiment shown in FIGS. 10 and 11, the engagement guide surface 3
g, 3h and a pair of release guide surfaces 3i, 3j are provided in a pair so as to face each other on the diameter. This engagement guide surface 3
g and 3h are formed as single-flow slopes inclined from the tips of the grooves 3b and 3c toward the inner bottom surfaces of the cutouts 3d and 3e. Also, the release guide surfaces 3i, 3j are engaged guide surfaces 3g, 3
h is formed on a single-flow slope inclined toward the grooves 3b and 3c from the tip end. That is, the engagement guide surface 3g and the release guide surface 3i meet to form a chevron, and the engagement guide surface 3h and the release guide surface 3j meet to form a chevron. for that reason,
The protrusions 6a, 6b are provided on the release guide surfaces 3i, 3j and the engagement guide surface 3.
Even if the hand is released from the round bar 2a at a stage where the round bar 2a is rotated to a position beyond the ridge line with the g and 3h, the retaining projections 6a and 6b are released by the bias of the coil spring 4 so that the release guiding surface 3i. , 3j automatically slides along the grooves 3b, 3j.
c.

The embodiment shown in FIGS. 12 and 13 is a modification of the embodiment shown in FIGS. 2 and 3, and has two arc-shaped end faces 3k on which the engagement guiding surfaces 3g and 3h are not formed. ,
3k is formed on a plane perpendicular to the axis of the pipe 3a, and is a ridge on the tip end side of the engagement guiding surfaces 3g, 3h, that is, the groove 3
The opening positions of the front ends b and 3c coincide with the surface positions.

The embodiment shown in FIG. 14 and FIG.
11 is a modification of the embodiment shown in FIG. 11, and two arc-shaped end surfaces 3k, 3k on which the engagement guide surfaces 3g, 3h and the release guide surfaces 3i, 3j are not formed are perpendicular to the axis of the pipe 3a. Engagement guide surfaces 3g, 3h
And the associated ridge line of the release guide surfaces 3i and 3j and the surface position match.

In still another embodiment shown in FIG. 16 and FIG. 17, the engagement guide surfaces 3g and 3h are diametrically opposed to each other on the base bottom surface of the expansion chamber 3f of the pipe 3a of the embedding fitting 3. Two sets of release guide surfaces 3i and 3j are provided. That is, the engagement guide surfaces 3g and 3h and the release guide surfaces 3i and 3j are provided on all of the four arc-shaped end surfaces.
Each of the two engagement guide surfaces 3g and 3h is formed as a single-flow slope inclined toward the inner bottom surfaces of the cutouts 3d and 3e. In addition, two release guide surfaces 3i and 3j are respectively provided with grooves 3b and 3b from the tips of the engagement guide surfaces 3g and 3h.
It is formed on a single-flow slope inclined toward 3c.
That is, each of the two engagement guide surfaces 3g and the release guide surface 3i associates to form a mountain, and each of the two engagement guide surfaces 3h and the release guide surface 3j associates to form a mountain. For this reason, the retaining projections 6a and 6b are
The round bar 2a is rotated at a stage where the round bar 2a is rotated to a position beyond the associated ridge line between the i, 3j and the engagement guiding surfaces 3g, 3h.
The release protrusions 6a and 6b are automatically slid along the release guide surfaces 3i and 3j by the urging of the coil spring 4, and reach the grooves 3b and 3c.

[0017]

As described above, according to the first aspect of the present invention, since the coil spring 4 is fitted to the base end of the round bar 2a of the insertion metal fitting 2, the blind hole at the distal end of the round bar is formed. Unlike the conventional device to be inserted, a large-diameter spring can be used, and the embedding metal fitting 3 and the inserting metal fitting 2 can be used.
Can be firmly fixed by a sufficiently large attractive force. Only the distal end portion of the round bar 2a is inserted into the pipe 3a of the embedded metal fitting 3, and the coil spring 4 is not inserted into the pipe 3a. The insertion fitting does not become unable to be inserted, and is excellent in durability.

Further, a huge chamber 3 perpendicular to the axis of the pipe 3a.
f, a notch 3 is formed on the bottom surface of the base from the tip of the groove 3b, 3c.
engagement guiding surfaces 3g, 3 inclined toward the inner bottom surfaces of d, 3e
h, the round bar 2 passing through the grooves 3b and 3c
The retaining projections 6a and 6b of the first a are guided by the engagement guide surfaces 3g and 3h under the urging of the coil spring 4 so that the notches 3a and 6b are notched.
d and 3e are securely engaged with each other.
The connection operation between the and the insertion fitting 2 is performed smoothly and automatically, and the operability is excellent. Is done.

According to the second aspect of the present invention, the engagement guide surface which is inclined from the distal end of the groove 3b, 3c toward the inner bottom surface of the notch 3d, 3e is formed on the base bottom surface of the expansion chamber 3f of the embedded metal fitting 3. 3g, 3h and the release guide surfaces 3i, 3j inclined from the tips of the engagement guide surfaces 3g, 3h toward the grooves 3b, 3c. The projections 6a and 6b are engaged with the engagement guiding surface 3g,
3h smoothly guides and engages the notches 3d and 3e with the notches 3d and 3e, and when removing the insertion fitting 2 from the embedding fitting 3, the retaining projections 6a and 6b are formed by the release guiding faces 3i and 3j. 3c is smoothly guided, and the operability is excellent in both the connection and disconnection operations.

[Brief description of the drawings]

FIG. 1 is a right side view of an embedding fitting constituting a hanging fitting for a concrete product according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a front view of an insertion fitting constituting the hanging fitting.

FIG. 5 is a left side view of the insertion fitting.

FIG. 6 is a vertical sectional view of a main part showing a state where an insertion fitting is inserted into the embedded fitting.

7 is a longitudinal sectional view of a main part showing a state in which the insertion fitting is rotated from the state of FIG. 6 and the insertion fitting is connected to the embedding fitting.

FIG. 8 is a sectional view corresponding to FIG. 2 in another embodiment of the present invention.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is a sectional view corresponding to FIG. 2 in still another embodiment of the present invention.

11 is a sectional view taken along line DD of FIG. 10;

FIG. 12 is a sectional view corresponding to FIG. 2 in another embodiment of the present invention.

13 is a sectional view taken along line EE of FIG.

FIG. 14 is a sectional view corresponding to FIG. 2 in still another embodiment of the present invention.

FIG. 15 is a sectional view taken along line FF of FIG. 14;

FIG. 16 is a sectional view corresponding to FIG. 2 in still another embodiment of the present invention.

FIG. 17 is a sectional view taken along line GG of FIG. 16;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete product 2 Insert fitting 2a Round bar 3 Embedded fitting 3a Pipe 3b Groove 3c Groove 3d Notch 3e Notch 3f Enlarged chamber 3g Engagement guide surface 3h Engagement guide surface 3i Release guide surface 3j Release guide surface 4 Coil spring 5 Spring receiving plate 6a Retaining projection 6b Retaining projection 7 Mounting bracket 8 Lifting ring 9 Eye bracket

Claims (2)

(57) [Claims] 1. An insertion fitting 2 in which a coil spring 4 for sliding bias is fitted to a base end of a round bar 2a, and retaining projections 6a and 6b are provided at a tip of a side wall of the round bar 2a. Rod 2
On the inner wall surface of the pipe 3a into which the distal end portion of "a" is inserted and withdrawn, grooves 3b, 3c through which the retaining projections 6a, 6b pass are provided in the axial direction, and the retaining projections 6a, 6 protruding from the grooves 3b, 3c.
An enlarged chamber 3f capable of moving b is provided in the distal end portion of the pipe 3a, and cutouts 3d and 3e at which the retaining projections 6a and 6b engage and disengage are formed on the bottom surface of the enlarged chamber 3f perpendicular to the axis of the pipe 3a.
Are provided by being dropped in the axial direction, and engagement guiding surfaces 3g, which are inclined from the tips of the grooves 3b, 3c toward the notches 3d, 3e.
Embedded metal fitting 3 having 3h provided at the base bottom surface of huge chamber 3f,
A hanging bracket for concrete products consisting of: 2. Grooves 3b, 3c are formed in the bottom surface of the proximal end of the enormous chamber 3f.
Engagement guide surfaces 3g and 3h inclined toward the inner bottom surfaces of the cutouts 3d and 3e from the tip of the release guide surface 3g and 3h.
The concrete product hanging metal fitting according to claim 1, wherein i and 3j are provided in a chevron.