JPH05149004A - Inverted u-shaped holder - Google Patents

Abstract

PURPOSE:To enable concrete beams to be lifted up in a straight line without bending in a chevron-shaped form by a method in which the upper end including connectors of concrete beams is covered with an inverted U-shaped holder and the concrete beams are to lifted up. CONSTITUTION:An inverted U-shaped holder A is formed of a steel face plate having openings of a sufficient size to insert eyebolt symmetrically from the center and left and right-handed hang plates 5 connected to the ends 4 of the face plate 3. Eyebolts to be connected with the hooks of a crane which are screwed with insert nuts previously buried in the surface of concrete beams assembled continuously. The eyebolts are matched with the openings 2 and exposed to the surface of the face plate 3, and the surface of the concrete beams connected is covered with the inverted U-shaped holder. The hook of a hanging rope is coupled with the eyebolts to lift up the concrete beams covered with the holder A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverted U-shaped body used when hoisting a plurality of concrete beams and connecting portions with a movable crane.

[0002]

2. Description of the Related Art Male and female connecting fittings fixed to both ends of an upper and lower tensile reinforcing bar project from both ends of a concrete beam. To connect a plurality of concrete beams at the bottom with a hollowed bottom is a downward work, which is not an easy work and requires a considerable working time. Therefore, in order to facilitate this connection work, connect as much as possible on the ground,
It must be hung and laid by a crane.

However, the concrete beam length is set to about 1.0 m, and three or more concrete beam unit connecting portions are in a movable state, that is, in order to lift the connecting portions and the concrete beam unit without restraining them. For concrete beams at the middle or both ends without connecting the suspension rope, bend the concrete beam at the both ends of the concrete beam to which the suspension rope is connected at the connecting part in a planar V shape.

Since a plurality of concrete beams to be lifted cannot be lifted in a straight line, there is a drawback that the inner side of the bent V-shape and the concrete edge of the connecting portion are compressed and damaged, which lowers the high value of the product. In addition, when laying on a concrete foundation slab that has been laid in advance while being bent, there is a drawback that it requires several times of correction work as compared to laying a concrete beam that is hoisted in a straight line. there were.

[0005]

Even if the connecting portions of a plurality of concrete beams are hung up in a movable state, a plurality of continuous concrete beams are connecting portions and do not bend in a dogleg shape, but form a straight line. Intended to be hoisted.

[0006]

[Means for Solving the Problems] In order to achieve the above object, at the upper end including a connecting portion of a plurality of concrete beams,
If the concrete U beam is covered with an inverted U-shaped body and the connection part of the concrete beam is not hung up in a plane when it is lifted, each concrete beam should be covered with a hanging plate from the side. to bound.

[0007]

[Function] By placing the inverted U-shaped body on the upper end of the continuous concrete beam unit, the continuous concrete beam unit and the connecting portion are sandwiched between the left and right hanging plates and restrained. , Prevents the action of bending in a dogleg shape.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
The inverted U-shaped body (A) is formed of a metal plate, such as an iron plate, or other material. The eyebolt (1) is used when a continuous aggregate of concrete beams (B) is lifted by a crane. A plurality of openings (2) of a size to be inserted are connected to the face plate (3), the face plate (3), and the width end (4), which are symmetrically provided from the length center of the inverted U-shaped body (A). The left and right hanging plates (5).

A plurality of openings (2) can be provided at positions that can be aligned with the positions of any insert nuts (6) of the continuous concrete beam (B). (The insert nut (6) is for inserting the eyebolt (1)) Further, the planar shape of the opening (2) may be circular, square or any other shape.

The face plate (3) is in direct contact with the upper surface (7) of the continuous concrete beam unit (B), and the continuous concrete beam unit (B) is bent from the connecting portion (8) into a dogleg shape in plan view. In this case, the face plate (3) and the left and right hanging plates (5) connected to the width ends (4) have a function of preventing the horizontal bending action of the face plate (3), and a certain thickness is required.

The hanging plate (5) is a width end (4) of the face plate (3).
To the width of the concrete beam (B), and the inner space of the left and right hanging plates (5) is adjusted to the concrete beam (B).
Are provided along the left and right side surfaces (9) of the
0) is bent outward in the lengthwise direction so that the concrete beam simple substance (B) can be easily fitted and fitted.

Further, the hanging length of the hanging plate (5) is set so as to prevent the dogleg-shaped bending of the plurality of concrete beam unit (B) connecting portions (8). Further, by providing the hanging plate (5) at right angles to the face plate (3) and on the right and left sides, it is effective in preventing the inverted U-shaped body (A) from being bent horizontally and upward and downward.

The hanging plate (5) is an inverted U-shaped body (A).
The length is not necessarily the same as the length of the face plate (3). As shown in FIG. 7, the hanging plate (5) can be divided into a short length from the width end (4) of the face plate (3) and connected to the face plate (3). In this case, the hanging plate (5) is fixed to the face plate (3) and the width end (4) by welding,
It can also be processed into an inverted U shape and fixed by welding to the face plate (3). In addition, the face plate (3) width, concrete beam alone (B)
Provided slightly wider than the width of the top surface (7), while the hanging plate (5)
It is also possible to put the tip (10) of the above into the inside and bend so that the continuous concrete beam unit (B) and the connecting portion (8) are strongly sandwiched from both eyes (9).

In order to actually use the inverted U-shaped sandwich (A), the concrete beam unit (B) is continuously assembled as shown in FIG.
The hanging hook (11) of the crane is hooked on the embedded insert nut (6), and the eyebolt (1) is inserted and screwed. (Two symmetrical positions) Next, eyebolt (1)
The opening (2) is aligned with, the eyebolt (1) is put out on the face plate (3), and the inverted U-shaped body (A) is put on the continuous concrete beam simple substance (B) upper surface (7).

Further, the opening portion (2) is aligned with the insert nut (6) of the continuous concrete beam (B), and the structure shown in FIG.
The inverted U-shaped body (A) is placed over the upper body as shown in Fig. 2, then the eyebolt (1) is inserted and screwed into the insert nut (6), and the hook (13) of the suspension rope (12) is attached to the eyebolt (6). It can be suspended by hanging on 1).

Further, when hoisting with a crane, as shown in FIG. 8, the connecting portion (8) of the concrete beam unit (B) and the horizontal rod between the crane hook (13) and the concrete beam unit (B) in order to prevent damage to the concrete. It is also possible to provide (14) and suspend the hanging between the eyebolts (1) to suspend the rope (12).

Further, the connection shape of the single concrete beam (B) is shown in FIGS. 9, 10, 11, 12, 13, and 14, but the shape of the plurality of single concrete beams (B) is shown in FIG. L.,. T. Figure 5 shows the + shape concrete beam alone (B)
It can be combined and connected with the concrete beam unit (B) of and can be lifted. In this case, it is not on the line connecting the eyebolts (1) on both sides. T. In the case of a + shaped accessory concrete beam alone (Ba), the hanging plate (5) is shown in FIG.
It can also be cut off at that part, as in 5. Furthermore,
The hanging pieces shown in FIGS. 10, 12, and 14 are more effective in protecting the connection portion (8) concrete from damage.

[0018]

Since the present invention is configured as described above, it has the following effects.

Even if a plurality of single concrete beams (B) are connected in succession, they are caught and restrained from the left and right side surfaces (9) by the hanging plate (5) of the inverted U-shaped body (A). ) Can be prevented from being folded in a plane in a dogleg shape.

Since the single concrete beam (B) can be connected on the ground, the workability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an inverted U-shaped body.

FIG. 2 is a front view of an upper surface of a continuous continuous concrete beam covered with an inverted U-shaped body, and eyebolts extending from a face plate and an opening.

FIG. 3 is a horizontal cross-sectional view of a concrete beam, which is covered with an inverted U-shaped body on the top surface.

FIG. 4 is a plan view of FIG.

FIG. 5 is a plan view of a single concrete beam.

FIG. 6 is a front view of FIG.

FIG. 7 is a main part front view showing another example of the inverted U-shaped body.

FIG. 8 is a front view showing an example in which a continuous single concrete beam is lifted by a crane using a horizontal rod.

FIG. 9 is a front view in which four concrete beams are connected in succession and an eyebolt is screwed into the endmost insert nut.

FIG. 10 is a front view in which four concrete beams are connected in succession, an inner second body is formed from the left and right ends, and eyebolts are screwed into the outer insert nuts of the concrete beams.

FIG. 11 is a front view in which four concrete beams are connected in succession and eyebolts are screwed onto the left and right end concrete beams and the inner insert nut.

FIG. 12 is a front view in which three concrete beams are connected in series, the left and right concrete beams are individually connected, and eyebolts are screwed into the inner insert nuts.

FIG. 13 is a front view in which three concrete beams are connected in succession, the left and right concrete beams are individually connected, and eyebolts are screwed to the outer insert nuts.

FIG. 14 is a front view in which two concrete beams are connected in succession and an eyebolt is screwed into an outer insert nut.

FIG. 15 is a front view in which the hanging plate of the inverted U-shaped conical body is cut out in accordance with the accessory concrete beam alone.

[Explanation of symbols]

 1 eyebolt 2 opening 3 face plate 4 width end 5 hanging plate 6 insert nut 7 upper surface 8 connection part 9 side surface 10 tip 11 hanging hook 12 hanging rope 13 hook 14 horizontal rod A inverted U-shaped sandwich B concrete beam single concrete concrete Beam alone

Claims (1)

[Claims] 1. A face plate (3) in which an opening (2) is provided symmetrically from the center of the length, and a left and right hanging plate (5) connected to the face plate (3) and the width end (4). It is characterized by Inverted U-shaped body.