JPH0319528Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an insert that is fixed to a formwork and embedded in a concrete wall. Concerning inserts for fixing.

(Prior art) A conventional insert has a nail hole at the bottom,
A fixing nail was inserted into this and fixed by driving it into the formwork with a hammer or the like.

(Problem that the invention aims to solve) However, with conventional fixation using nails, if a worker accidentally trips on the insert fixed on the formwork, the nail surface is formed straight, so the insert may be damaged. There was a problem with the upper part easily coming off.

In contrast, the present inventor proposed that by providing a screw structure at the tip of the insert and screwing it into the formwork to fix it, the insert would be more effective than conventional inserts in which fixing nails are driven in with a hammer or the like to fix it to the formwork. , proposed that the screw grooves would make it more securely fixed to the formwork, making it difficult for it to come off upwards.

The present invention was developed in view of these circumstances, and the first purpose of the present invention is to provide an insert with a screw structure at the tip, which can be screwed into the formwork by hand and fixed. It is something.

Furthermore, in Utility Application No. 60-65831, the present inventor proposed that in order to further strengthen and ensure the fixation of the insert to the formwork, the insert equipped with a fixing screw such as a screw nail was driven halfway, and We have proposed a driving tool that can be screwed into the formwork afterwards, thereby making it easier to fix the insert to the formwork, and making it easier and more efficient to fix the insert.

As shown in FIGS. 5 to 7, this driving tool consists of a driving tool body 26 and a sliding driving body 27, and a groove 22 that extends upward from the lower end of the driving tool main body 26. A notch 23, which serves as a holding portion for temporarily holding the insert, is formed in series with the groove 22. The sliding driving body 27 is fitted into the driving tool main body 26 from above so as to be able to freely move up and down.

A second object of the present invention is to use the driving tool to
It attempts to provide an insert for fixing to formwork.

(Means for solving the problem) Therefore, the insert according to the present invention has an insert main body whose head is formed in a non-circular shape, and a removable insert at the bottom of the insert main body, in order to rotate the insert and screw it into the formwork. It is fitted and equipped with a rotation stopper to follow the rotation of the insert body,
It is characterized by consisting of a fixing device having a fixing screw at the tip for screwing into the formwork and fixing the insert.

(Function) Therefore, in the case of this insert, the fixing device is inserted into the lower part of the insert body, the head of the insert body formed in a non-circular shape is held in the hand or a driving tool, and the The rotational force of the driving tool can be applied to the insert, thereby making it possible to screw and fix the insert into the formwork.

(Example) Hereinafter, the present invention will be explained according to an example shown in the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which the insert includes an insert main body 1,
It consists of a fixing tool 2 having a fixing screw 5 at its tip for fixing the insert by screwing it into the formwork.

Now, in the case of this embodiment, the head of the insert body 1 is formed with a vertically elongated protrusion 3 protruding from a cylindrical outer peripheral surface.

The fixture 2 is adapted to be removably inserted into a bolt insertion hole 6 formed in the lower part of the insert main body 1. Furthermore, a convex portion 4 is formed on the upper outer periphery of the fixture 2 as a rotation preventing portion. A recess 7 is formed in the bolt insertion hole 6 of the insert body 1 so as to correspond to the projection 4 . As a result, when the fixture 2 is inserted into the lower part of the insert body 1, the convex portion 4 and the concave portion 7 are engaged with each other, and the fixture 2 follows the rotation of the insert body 1.

Therefore, as shown in Figs. 3 and 4, in order to fix the insert to the formwork, insert the insert body 1.
Insert the fixture 2 into the bolt insertion hole 6 at the bottom, hold the head of the insert body 1 with your hand, place the tip of the fixing screw 5 of the fixture 2 on the formwork 29, and insert the protrusion on the insert body 1. The insert consisting of the insert main body 1 and the fixture 2 is rotated by pressing the thumb against one of the parts 3 and the index or middle finger against the other. As a result, the fixing screw 5 is screwed into the formwork 29 while cutting a threaded groove, and the insert is thus fixed to the formwork 29.

At this time, the insert fixed to the formwork 29 is tightened to the formwork 29 by the screw groove of the fixing screw 5, so that it becomes difficult to come off from the formwork 29 and is more firmly fixed.

The insert can also be secured to the mold using a driving tool 20 shown in FIG.

That is, as shown in FIG.
A notch 23 inserted further into the groove 22 and connected to the groove 22
By hooking the insert to the driving tool 2
Temporarily hold at 0. When the driving tool 20 is rotated in this manner, the protrusion 3 comes into contact with the side edge of the groove 22, thereby making it possible for the insert to follow the rotational operation of the driving tool 20.

To fix the insert to the formwork using this driving tool 20, first insert the fixing tool 2 into the bolt insertion hole at the bottom of the insert main body 1, and as shown in FIG. By inserting the protrusion 3 formed on the outer periphery of the head of the insert body 1 through the groove 22 formed in the driving tool 20, and further hooking it into the notch 23 connected to the groove 22, the insert body 1 and the fixing tool are removed. 2 is temporarily held in a driving tool 20.

Next, as shown in FIG. 7, the driving tool 20 is moved to a predetermined position on the formwork 29, the lower end of the driving tool 20 is lowered, and the grip 28 of the sliding driving body 27 is lifted by hand and driven down. Repeat this driving down of the sliding driving body 27 once or twice, and attach the fixing screw 5 to the formwork 2.
Enter halfway into 9. Next, when the driving tool 20 is rotated in the screwing direction of the insert, both the insert and the driving tool 20 rotate, and the fixing screw 5 is screwed into the formwork 29 to fix the insert to the formwork 29.

At this time, the insert fixed to the formwork 29 is tightened to the formwork 29 by the screw groove of the fixing screw 5, as described in FIGS. 3 and 4, and becomes difficult to come off from the formwork 29. Fixed more firmly.

In addition, since the insert is rotated and screwed into the formwork, the head of the insert main body 1 only needs to be formed in a non-circular shape, and in addition to the protrusion 3 of the above embodiment,
As shown in FIG. 8, the entire head of the insert body 1 may be formed into a flat shape, or as shown in FIG. 9, several pins 8 protruding from the outer periphery of the head of the insert body 1 may be formed. You can. Further, as shown in FIG. 10, the head of the insert main body 1 may be formed into a hexagonal shape. In this case, the inner shape of the insert insertion portion of the driving tool 20 is also formed into a hexagonal shape to match the head shape of the insert main body 1, as shown in FIG. 11 in the case of the insert shown in FIG. The outer peripheral surface of the head of the main body 1 and the inner peripheral surface 25 of the driving tool 20
The insert follows the rotational operation of the driving tool 20 through contact with the driving tool 20.

Further, although the protrusions 3 in the embodiment are formed at two locations, the present invention is not limited to this, and may be formed at any number of locations. In addition, if it is formed in two places, it is sufficient to temporarily hold the driving tool 20 and follow the rotation of the driving tool 20.

Furthermore, regarding the rotation prevention part of the fixture 2, in addition to the above-mentioned embodiment, as shown in FIG. The rotation of the insert body 1 may be followed by fitting the concavo-convex body 10 into the bolt insertion hole 6 in the lower part of the insert body 1. Further, as shown in FIG. 13, a notch 11 is formed in the lower part of the insert main body 1, and a locking body 12 that can be locked in the notch 11 is formed on the upper outer periphery of the fixture 2. The fixing tool 2 is locked into the notch 11, thereby inserting the fixture 2 into the insert body 1.
It may also be possible to follow the rotation of .

(Effects of the invention) In this way, the insert according to the invention can be used by inserting a fixture into the lower part of the insert body, holding the head of the non-circular insert body by hand or a driving tool, and inserting the fixing tool into the lower part of the insert body. Alternatively, the rotational force of the driving tool can be applied to the insert, thereby making it possible to easily screw and fix the insert into the formwork.

Such inserts are more firmly fixed to the formwork than conventional inserts which are fixed simply by driving nails, and can prevent the inserts from coming off upward due to the nails coming off.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the insert according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is an exploded perspective view with the insert main body and fixture separated, and FIG. and Fig. 4 are side views showing the state when the insert shown in Fig. 1 is fixed to the formwork, Fig. 5 is a perspective view of the driving tool used for the insert shown in Fig. 1, and Fig. 6 is a FIG. 7 is a perspective view showing a state in which the insert shown in FIG. 1 is temporarily held in a driving tool; FIG. 7 is a vertical sectional side view showing a state in which the insert shown in FIG. 1 is fixed to a formwork; FIGS. Fig. 10 is a perspective view showing different examples of inserts according to the present invention in which the head shape of the insert body is different, and Fig. 11 is a part of a driving tool used for the insert shown in Fig. 10. The cutout portion perspective view, FIGS. 12 and 13 each show different examples of the rotation prevention portion of the fixture, and are exploded perspective views of the insert main body and the fixture separated. In the figure, 1 is an insert body, 2 is a fixture, 3 is a protrusion, 4 is a convex portion, and 5 is a fixing screw.

Claims (1)

[Scope of utility model registration request] In order to rotate the insert and screw it into the formwork,
An insert body whose head is formed into a non-circular shape,
A fixing device that is removably inserted into the lower part of the insert body, has a rotation stopper to follow the rotation of the insert body, and has a fixing screw at the tip to screw into the formwork and fix the insert. Insert consisting of.