JPS638191A - Connector for hanging concrete product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Major Field of the Invention This invention relates to a fastener for hanging concrete products.

(Prior art) Generally, when manufacturing concrete products such as U-shaped grooves, a locking tool for screwing a hanging metal fitting is buried in advance, and the opening of this locking tool is connected to the outer surface of the concrete product. The structure is exposed flush with the surface, making it easier to hang it with a crane when transporting and laying concrete products.

That is, as shown in FIG. 9, the U-shaped groove 310 both side walls 3
The openings 33 of the cylindrical locking tools embedded in the two (only one side wall 32 is shown) are exposed to the outside, and a bolt 34 is screwed into the openings 33. Then, as shown in FIG. 10, by locking the metal fitting M connected to the wire W etc. to the base end of the bolt 34, the U-shaped groove 3
1 is designed to be hung horizontally using a crane or the like.

However, there are various obstacles at the work site such as accumulated earth and sand, construction tools, etc., and it may be a factor to make the bolt 34 protrude from the outer surface of the side wall 32 of the U-shaped groove 310. Hanging can be difficult.

(Problems to be Solved by the Invention) As described above, this invention attempts to solve the problem that horizontal lifting is difficult when there are obstacles at the work site. Regardless of the situation, the object of the present invention is to provide a fastening device for hanging concrete products that can be hung horizontally.

Structure of the Invention (Measures to Solve the Problems!Jt) In order to solve the above-mentioned problems, this invention has the following features: In order to solve the above-mentioned problems, a screw thread is carved on the inner circumferential surface of the locking device body, which is approximately cylindrical, and , the closed end surface of a cap member that is attached to the end of the locking tool body and buried in the concrete product integrally with the locking tool body is formed so as to be punchable, and the cap member is further attached to the locking tool body. In this state, the length from the open end of the anchor body to the closed end surface of the cap member is made equal to the thickness of the buried part of the concrete product.

(Function) By employing the above-mentioned means, the present invention exposes the open end of the anchor body on one surface of the concrete product on the same plane as the buried site. Further, the closed end surface of the camp member is exposed on the same plane as the other surface of the concrete product, and the closed end surface can be punched out to open it.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to FIGS. 1 to 8.

FIG. 1 shows a locking tool according to the present invention, which is composed of a locking tool main body 1 having a substantially cylindrical shape and a cap member 2 which is replaceably attached to the main body 1 of the locking tool.

First, the main body 1 of the locking tool will be explained.
An opening 4 is formed at the front end, and four movement prevention fins are provided at equiangularly spaced positions in the circumferential direction, as shown in FIG. 5 is formed. The movement prevention fins 5 have a tapered shape that is higher at the rear, and a retaining flange 6 is formed at the rear end of the large diameter portion 3 to connect the rear ends of the movement prevention fins 5. Furthermore, a thread 7 is threaded on the rear part of the inner circumferential surface of the locking tool main body 1.

A small-diameter portion 8 is formed rearward of the retaining flange 6 of the locking device main body 1, and its outer circumferential surface has a tapered mounting surface 9 with a small diameter at the rear.

The length of this small diameter portion 8 is set to such a length that it will not deform when a bolt 19 described later is inserted.

The cap member 2 also has a mounting portion 1 formed in the front half thereof.
0, and a small-diameter extending portion 12 that continues from the mounting portion 10 via a stepped portion 11, and the rear end of the extending portion 12 is closed by a closed end surface 13. Note that the inner circumferential surface of the mounting portion 10 of the cap member 2 is a surface 9 for mounting the locking tool main body 1.
A tapered locking surface 14 is formed corresponding to the step portion 11, and an abutting surface 15 is formed at a position corresponding to the stepped portion 11.

Further, an annular punching groove 16 is formed on the entire outer peripheral edge of the inner surface of the closed end surface 13 of the cap member 2, and is punched out when the closed end surface 13 is strongly hit with a metal fitting or the like.

Here, a method for embedding the above-mentioned locking tool in the concrete product C will be explained below.

First, as shown in FIG. 2, the cap member 2 is externally fitted onto the small diameter portion 8 of the locking tool body 1, and the cap member 2 is pushed until the tip surface of the small diameter portion 8 comes into contact with the contact surface 15. Attaching the locking tool 4 and the locking tool main body 1 brings the surfaces 9 into pressure contact with each other. Therefore, the cap member 2 is firmly and reliably attached to the locking tool main body 1. At this time, the length from the opening 4 of the locking tool body 1 to the closed end surface 13 of the cap member 2, and both the inner and outer frame plates 17 at the desired location of the locking tool embedding of the frame F for cement pouring shown in FIG. The cap members 2 are selected so that the spacing between them is equal. Note that a bolt insertion hole B having the same diameter as the inner diameter of the opening 4 of the locking tool main body 1 is formed in the outer frame plate 17.

In the above state, position the locking tool main body 1 outward and open the opening 4.
is placed in the frame F so as to correspond to the bolt insertion hole B, the opening 4 of the locking device main body 1 and the closed end surface 13 of the cap member 2 are in contact with the inner surfaces of both frame plates 17, respectively. Become. In this state, the locking tool is held between the outer frame plates 17 and held in a predetermined position. Then, the closing bolt 20 is inserted into the bolt insertion hole B of the frame plate 17 and screwed into the locking tool main body 1 to close it.

After that, when cement is poured into the frame F, since the opening 4 of the locking device main body 1 is closed with the closing bolt 20, the cement leaks into the locking device main body 1 from the opening 4. Never. When the cement hardens, the locking tool is buried in the concrete product C, and the opening 4 of the locking tool main body 1 and the closed end surface 13 of the cap member 2 are flush with both sides of the concrete product C. do.

As shown in FIG. 5, a bolt 19 connected to the wire W via a metal fitting 18 is screwed into the main body 1 of the locking device, so that the locking device can be firmly installed.

Concrete product C with anchors embedded using the above method
To lay the wire W, as shown in FIG. 7, the wire W is suspended by a crane and transported to a desired work position.

Now, how to use the locking tool configured as described above will be explained below.

When the concrete product C is suspended horizontally, the bolt 19 is basically screwed into the anchor body 1 from the outside of the concrete product C, as shown in FIG. However, as shown in Figure 7, when transporting concrete product C, if there are obstacles such as accumulated earth and sand or construction tools at the work site,
The bolts 19 protruding from the outer surface of the concrete product C interfere with obstacles and prevent smooth transportation. In this case, after screwing the bolts 19 back from the locking device body 1, Cap member 2 exposed from the inner surface
Hit the closed end surface 13 of the block with a metal fitting or the like.

Then, the closed end surface 13 is punched out by the action of the punching groove 16 and opened. Thereafter, as shown in FIG. 6, the bolt 19 is inserted into the locking tool main body 1 from the opening through the cap member 2 and is engaged. Therefore, the 8th vg.
As shown in J, the bolts 19 protrude inward from the inner surface of the concrete product C, and do not interfere with obstacles at the work site. Therefore, regardless of the situation at the work site, the concrete product C is reliably transported horizontally.

Furthermore, the concrete products C have different thicknesses depending on their uses, and are manufactured with different intervals between the frame plates 17 of the frame F. In this case, it is possible to replace the camping member 2 attached to the locking tool main body 1 and use one having a different length depending on the spacing between the frame plates 17. Therefore, even when buried in concrete products C having different thicknesses, the same locking tool main body 1 can be used, and only the cap member 2 needs to be replaced. Therefore, there is no need to manufacture a plurality of locking tool bodies 1 having different lengths, resulting in excellent economical efficiency.

In addition, when suspending the concrete product C horizontally, the locking tool body 1
Since four movement prevention fins 5 are formed in the locking tool body 1, even if the bolt 19 is strongly screwed into the locking tool main body 1, the locking tool main body 1
can be prevented from moving within the concrete product C due to rotation, displacement, etc.

In addition, when suspending concrete product C horizontally, the locking tool body 1
Since the retaining flange 6 receives the upward force applied to the
The locking tool main body 1 will not shift upward and be removed from the concrete product C.

Furthermore, since a plurality of movement prevention fins 5 are formed on the large diameter portion 3 of the locking device body 1, and a retaining flange 6 is provided to connect these fins, the dead weight of the concrete product C, In addition to dispersing the stress caused by external forces such as shaking, the movement prevention fins 5 are tapered so that the rear end is higher, so even if a large external force is applied, the entire length will receive the force and break. Never.

Effects of the Invention As detailed above, the present invention has a screw thread formed on the inner circumferential surface of a locking device body having a substantially cylindrical shape, and a locking device that is attached to the end of the locking device body. The closed end face of the cap member, which is embedded in the concrete product integrally with the main body, is formed to be punchable, and the closed end face of the cap member is punched from the open end of the fastener main body with the cap member attached to the fastener main body. By making the length of the concrete product equal to the thickness of the buried part of the concrete product, it has the excellent effect of being able to be hung horizontally regardless of the conditions at the work site.

[Brief explanation of the drawing]

Fig. 1 is a front view embodying the locking device of the present invention, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a side view of Fig. 1, and Fig. 4 is a side view of Fig. 1.
The figure is a cross-sectional view showing how to embed the locking device in a concrete product, Figure 5 is a cross-sectional view showing the state in which the bolt is screwed into the locking device, and Figure 6 is a cross-sectional view showing how the bolt is screwed into the locking device. 7 is a front view showing a concrete product horizontally suspended, FIG. 8 is a front view showing another concrete product horizontally suspended, and FIG. 9 is a conventional A partially cutaway front view showing the technique, and FIG. 10 are front views showing the same prior art. Locking tool body 1, cap member 2, thread 7, closed end surface 1
3. Concrete product C0 Patent applicant Masami Masami, representative
Patent Attorney On 1) Hiroshi Nobuo Figure 10

Claims (1)

[Claims] 1. A screw thread (7) is formed on the inner peripheral surface of the locking device main body (1) having a substantially cylindrical shape, and the locking device is attached to the end of the locking device main body (1). The closed end surface (13) of the cap member (2) to be buried in the concrete product (C) integrally with the locking tool body (1) is formed so as to be punchable, and the cap member (13) is embedded in the locking tool body (1). With the member (2) attached, move from the open end of the locking device body (1) to the closed end surface (
13) A locking device for hanging a concrete product, characterized in that the length up to 13) is equal to the thickness of the buried part of the concrete product (C). 2. The locking device for hanging a concrete product as set forth in claim 1, characterized in that the closed end surface (13) is formed with a punched groove (16) extending over the entire outer peripheral edge thereof. 3. The locking tool main body (1) has a large diameter part (3) and a large diameter part (
3), and a tapered mounting surface (9) is provided on the outer peripheral surface of the small diameter portion (8). Fasteners for hanging concrete products as described. 4. The cap member (2) has a tapered locking surface (14) on a part of its inner peripheral surface, which corresponds to the mounting surface (9) of the locking device body (1). A fastener for hanging a concrete product according to claim 1.