JPS6329934Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anchor for use in soft and porous materials such as foamed concrete.

A similar type of anchor has heretofore been known as Utility Model Publication No. 19449/1983. However, it had the following drawbacks.

(b) There are many parts.

(b) Production is troublesome. Particularly, it is troublesome to assemble the belt-shaped metal plate.

(c) It will be expensive.

(d) Strong support force may not be obtained because the crotch split is not performed reliably.

In addition, a member was used to forcibly open the ends of the pair of legs of the anchor.
No. 20609 is publicly known. However, this also has the following drawbacks.

(a) Since the leg spread member is a thin strip or thin wire,
Assembling the parts is troublesome.

(b) Since the slits forming the legs are only made in a short range at the tip, in practice, it is extremely difficult to open the legs deep in the foamed concrete after driving the anchor deeply.

(c) The leg opening member is composed of a thin strip or wire,
It is easy to break or bend when folded.

(d) The only part where the leg spreading member generates resistance is the extremely small bent part, and it is not possible to obtain enough force to spread the anchor leg body deep in the hard foam concrete. Moreover, the force obtained to open the legs is unstable and varies widely.

(e) After driving, the pulling force is not very large.

The present invention aims to eliminate these conventional drawbacks.

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments.

As shown in FIG. 1, the anchor of the present invention has a pair of legs 1, 1 having a semicircular cross section, which are integrally connected at a head 2 with their flat surfaces facing each other. A ring body 3 is attached to the outer periphery of the saw legs 1, 1 so as to be slidable in the axial direction. Thus, the cut 13 of this anchor is formed over the entire length except for the head 2.

Tapered surface portions 5, 5 are formed at the tips of the flat opposing surfaces 4, 4 of the pair of legs 1, 1, respectively, and the opposing surfaces 4, 4 have a widening tapered shape at the tips.

As shown in FIGS. 3 and 4, the ring body 3 has a substantially circular outer ring part 6 that is fitted around the outer periphery of the legs 1, 1, and also has a substantially circular outer ring part 6 that is fitted around the outer circumference of the legs 1, In between, as shown in FIG. 2, there is provided a crotch part 7 that cuts in immediately after the start of driving during driving.

Specifically, the outer ring part 6 has a circular flat washer shape, and the split part 7 is suspended from the outer ring part 6 in a U-shape. The outer ring part 6 and the split part 7 are integrally formed, and when viewed from the axial direction, the split part 7 bridges the circular outer ring part 6 in the diametrical direction. The ring body 3 in the illustrated example has the shape of a loincloth, so to speak, and as is clear from FIG. In step 7, split the legs 1, 1 into two. and,
The tapered portions 8, 8 are formed by thinning the inner peripheral side of the U-shaped crotch portion 7, and when inserted between the pair of legs 1, 1 as described above, a “wedge” effect is created. Make it even smoother. Also, Figures 1 and 4
As shown in the figure, the height h from the lower surface of the outer ring part 6 to the inner peripheral edge of the split part 7 is set smaller than the height H of the tapered surface part 5 of the legs 1, 1. 2
As shown in the picture, if you hit it a little, it will immediately start opening your legs.

Further, as in another modification shown in FIG. 5, it may be preferable to form the outer ring part 6 and the split part 7 in the same plane because it is easy to manufacture.

In addition, in Fig. 5, by using relatively soft copper, aluminum, etc. as the material, Fig. 2 →
It is also preferable that as the needles are driven in sequentially, the central crotch part 7 stretches to form a "loincloth" shape similar to that shown in FIG. 3.

Still another modification shown in FIGS. 6 to 8 shows a ring body 3 that can be manufactured extremely easily by press working or the like.

In Fig. 6, two upright pieces 9, 9 are made in a semicircle from a circular or oval plate material, leaving the center.
The crotch cleft part 7 is formed by raising and holding the crotch part 7. In this case as well, the tapered portions 8, 8 will be provided.

In FIGS. 7 and 8, after the processing such as pressing shown in FIG. 6, the tips of the upright pieces 9, 9 are bent 10, 10 in a direction closer to each other, as shown in FIG. When used by driving the two upright pieces 9,
9, the tapered portions 8, 8 acting as wedges are maintained, and the legs 1, 1 are forcefully split to form a bifurcated shape. be.

In FIG. 2, in order to use the anchor according to the present invention, it is driven into a wall 11 such as foamed concrete using a hammer (not shown). 12 indicates an object to be attached.

As described above, since it is determined that h<H, the outer ring portion 6 of the ring body 3 immediately contacts the object 12 to be attached even if the amount of driving is small, and remains in that position, and the leg body 1 The chisel is being driven in. Therefore, the crotch part 7 of the ring body 3 is forcibly connected to the pair of legs 1,
It cuts in between the opposing surfaces 4 and 4 of 1, and the same figure -
As in, the legs 1, 1 gradually expand,
After driving, it can withstand strong pulling force. So-called,
It becomes a dovetail-like driven state and exhibits strong pull-out resistance.

In the present invention, as described above, the pair of legs 1, 1 are separated by a cut 13 up to the head 2.
The legs 1,
Tapered surface portions 5, 5 are formed at the tips of the opposing surfaces 4, 4 of the pair of legs 1, 4, so that the tips of the opposing surfaces 4, 4 have an expanding tapered shape, and further, a sliding portion is formed on the outer periphery of the pair of legs 1, 1. A circular flat washer-shaped outer ring portion 6 that is movably fitted on the outside.
A ring body 3 is movably attached to the legs 1, 1, and integrally has a split part 7 intervening between the opposing surfaces 4, 4 of the legs 1, 1, and Part 7
has tapered portions 8, 8 on both sides so that the wall thickness decreases on the side of the head 2, and is constructed by bridging the outer ring portion 6 in its diameter direction when viewed from the axial direction. The following significant practical effects can be obtained.

Assembly is easy because the outer annular portion 6 of the ring body 3 only needs to be fitted onto the legs 1, 1. Moreover, there are no parts that will break even if handled roughly.

Due to the tapered surface part 5 and the tapered part 8, the legs can be opened smoothly immediately after driving. In particular, the opening edge of a driving hole formed in a wall such as foamed concrete is not destroyed, and a strong pulling force can be obtained. That is, during driving, the outer ring part 6 suppresses the vibration of the legs 1, 1 in the direction away from each other, and breaks the opening edge of the driving hole in the wall such as foamed concrete into small pieces. It prevents you from doing so.

Even when driven in roughly, a stable and powerful pulling force is always obtained. In particular, since the outer ring part 6 in the shape of a circular flat washer is bridged by the split part 7 in the diametrical direction, a stable posture can be maintained at all times during driving.

The legs 1, 1 can be expanded widely (as shown in Fig. 2), and a stronger pulling force can be achieved.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figures are a partially sectional front view for sequentially explaining how to use the ring body, and Figure 3 is a perspective view showing an example of a ring body.
FIG. 4 is an enlarged sectional view of the same, FIG. 5 is an enlarged sectional view of a modified example of the ring body, FIGS. 6 and 7 are perspective views showing still another embodiment, and FIG. 8 is a ring of the ring shown in FIG. 7. It is a front view of the body. 1... Leg body, 2... Head, 3... Ring body, 4
... Opposing surface, 5 ... Tapered surface part, 6 ... Outer ring part,
7...Cleft part, 8...Tapered part, 13...Cut.

Claims (1)

[Scope of utility model registration request] The pair of legs 1, 1 are separated by a cut 13 up to the head 2, and are interconnected and integrated at the head 2, and the tips of the opposing surfaces 4, 4 of the legs 1, 1 are Forming tapered surface portions 5, 5, the opposing surfaces 4, 4
The distal end thereof is expanded and tapered, and further includes a circular flat washer-shaped outer ring portion 6 that is slidably fitted on the outer periphery of the pair of legs 1, 1, and the above-mentioned opposing portion of the legs 1, 1. A ring body 3 integrally having a crotch part 7 intervening between the surfaces 4, 4 is movably attached to the leg bodies 1, 1, and the crotch part 7 has a thick wall on the side of the head 2. An anchor characterized in that it has tapered portions 8, 8 on both sides so that the angle decreases, and is constructed by bridging the outer ring portion 6 in its diametrical direction when viewed from the axial direction.