JPH0227044Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an insert buried in a concrete slab, and particularly to an insert used when the concrete slab is covered with a heat insulating material.

(Prior art) Inserts are buried in a concrete slab and bolts are attached to them to support ceiling panels, piping, etc., but they must be fixed in advance to formwork before concrete is poured. No.

By the way, when burying this insert in a concrete slab, there is no problem if you pour concrete directly onto the formwork, but if you lay a heat insulating material on the formwork and then pour the concrete on top of this heat insulating material. The following problems arose when pouring. That is, since bolts for supporting a ceiling panel or the like must be attached to the insert later, a portion of the insert must communicate with the outside of the insulation material.
Therefore, before fixing the insert to the formwork, holes must be made in advance at the places where the insert of the insulation material is to be fixed. However, preparing holes in the insulation material in advance is extremely troublesome, as it is necessary to drill the holes at right angles to the insulation material in order to suspend the bolts vertically downward. Furthermore, if the hole once drilled is in an inappropriate position, it may be necessary to refill it. This hole-drilling work is even more troublesome when the insulation material is relatively hard, such as wood wool board made from thinly cut wood hardened with cement. It becomes work.

In order to save the trouble of making holes in such a heat insulating material, an insert as seen in, for example, Japanese Utility Model Application Laid-Open No. 58-190502 has been proposed. As shown in FIG. 12, this insert has a screw hole 73 in which a female thread 72 is threaded at the lower end of an insert shaft portion 71 into which an insert seat body 70 is fitted. A protrusion 75 having a protrusion 74 is provided on the upper part of the screw hole 73, and an attachment 78 having a nail 76 fixed therein is fitted.

Furthermore, as shown in the figure, in this insert, the heat insulating material 40 is simply sheared without being compressed by the attachment 78. A cavity must be provided in the attachment 78, which requires considerable effort to manufacture. Further, since this attachment 78 does not have a part for inserting a jig such as a nail puller, it is difficult to remove it from the formwork 30, and therefore it cannot be reused. Furthermore, since a portion 42 of the insulation material 40 remains within the attachment 78 after the insert is fixed to the formwork 30, this also causes the attachment 7
It is difficult to use 8 again.

Further, as the heat insulating material, as mentioned above, there is a material such as a wood wool board made by cutting wood into thin strips and hardening it with cement, and there is also a material made of a synthetic resin such as styrofoam. If the heat insulating material is a wood wool board, the degree of shrinkage of this wood wool board is less than that of Styrofoam, so it is impossible to compress and fill it into the insert attachment 78 shown in FIG. 12. In other words, the insert shown in FIG. 12 can only be used as a heat insulating material such as Styrofoam, which can shrink relatively significantly.

(Problem that the invention attempts to solve) This invention was made in view of the above-mentioned actual situation, and the problem that it attempts to solve is that there is no need to make holes in the insulation material when fixing it. Needless to say, it is an object of the present invention to provide an insert that has a simple structure, allows the fixture to be easily removed from the formwork, and is reusable.
Furthermore, the problem to be solved by the present invention is not limited to the degree of shrinkage of the applied insulation material, but is also effective when the insulation material is something like wood wool board that is relatively difficult to compress. The purpose is to provide inserts.

(Means for Solving the Problems) The means adopted by the present invention to solve the above problems is that a fixing device for fixing the insert body to the formwork is formed on the central lower surface of the insert body. a cylindrical body part which is fitted and supported at the upper part in the recess and has an axial notch; a fixed body which is fitted and supported at the inner upper end of the cylindrical body part; This insert is characterized by comprising a fixing nail protruding outward from the lower end of the cylindrical body.

A specific example of this means will be explained below with reference to the drawings. Figure 1 shows an insert 100A according to the present invention.
The insert 100A shown here includes an insert main body 10 and a fixture 20 that is assembled to the insert main body 10 and fixes the insert main body 10 on the formwork 30 with a heat insulating material 40 in between. The insert main body 10 is fixed onto a formwork 30 by a fixture 20. In this case, a heat insulating material 40 is interposed between the formwork 30 and the concrete slab 50, and the insert 100A is placed on this heat insulating material 40. When the insert 100A is fixed to the formwork 30 in this way, the heat insulating material 4
The part located inside the fixture 20 of 0 has already been sheared.

The insert main body 10 mainly consists of a head 11, a body 13, and a flange 15, and in this example, these head 11, body 13, and flange 15
is integrally formed from synthetic resin. Head 1
A nut 12 for fixing a bolt for supporting a ceiling plate or the like is placed inside the nut 1, and the nut 12 is covered by a lid 11a fitted onto the head 11. Further, a bolt insertion hole 14 formed at the center of the body portion 13 is connected to the nut 12. The lower end of the bolt insertion hole 14 opens downward at the center of the flange portion 15, so that the above-mentioned bolt can be inserted toward the nut 12. Flange part 1
5 is flat and has a large area so that when placed on the heat insulator 40, the axis of the body 13 is perpendicular to the heat insulator 40. A fixture 2 is provided on the lower surface of this flange portion 15.
A recess 16 is formed into which the upper part of 0 is removably fitted.

The fixing tool 20 consists of a fixing body 21, a cylindrical body part 22, and a fixing nail 23. In the case of this example, the head of the metal fixing nail 23 is integrally molded so as to be located approximately at the center of the synthetic resin fixing body 21,
As a result, the fixed main body 21 is formed in a solid state. This fixing tool 20 has a fixing body 21 fitted to the upper part of the cylindrical body part 22, and the upper part can be freely inserted into and removed from the recess 16 of the insert body 10, and the shoulder part of the cylindrical body part 22 22a and a portion of the upper surface of the fixture 20 are brought into contact with a portion of the lower surface of the insert body 10, thereby positioning and fixing the fixture to the insert body 10.
The cylindrical body portion 22 is made of metal and has a predetermined elastic force.
As shown in FIG. 2, this cylindrical body portion 22 has a single notch 24 formed in its axial direction.

FIG. 3 shows an insert 100B that is another example of the present invention. This insert 100B
The difference between this and the above insert 100A is that
Driving tool 1 whose insert bodies 10 are separate from each other
0a and a support 10b. The driving tool 10a includes a head 11 in which a nut 12 is embedded, and a body 13 having a bolt insertion hole 14.
It is formed by integrally molding these from synthetic resin. On the other hand, the support 10b has a recess 16 formed on its lower surface and a cylindrical body 1 in the center.
By forming 7a, a guide hole 17 is provided that stands upright with respect to the flange portion 15. When the driving tool 10a is driven into the support tool 10a with a hammer or the like, the fixed body 21 is in contact with the lower end surface 13a of the body 13.
It slides downward within the guide hole 17 of 0b.

Furthermore, FIG. 4 shows an insert 100C which is yet another example of the present invention. The insert 10 shown in FIG. 3 of this insert 100C
The difference from 0B is the fixing body 2 of the fixture 20.
1 At the top, there is a bolt insertion hole 1 of the insert body 10.
4 is provided with a protrusion 21b that is fitted into the protrusion 21b. Then, the protrusion 21b of the fixed body 21 is fitted into the bolt insertion hole 14 of the insert body 10,
The cylindrical body part 22 of the fixture 20 is brought into contact with the lower end of the body part 13 of the insert body 10, and the insert body 1
0 and the fixture 20 are integrated to form the insert 100C.

(Aspects of Use and Effects) Next, insert 100 configured as described above
When using A in actual work,
This will be explained with reference to FIGS. 5 to 8. First, the upper part of the fixture 20 is fitted into the recess 16 located at the lower end of the bolt insertion hole 14 of the insert body 10, and the insert body 10 and the fixture 20 are integrated to form the insert 100A. The insert 100A thus constructed is inserted into a predetermined position of the heat insulating material 40 placed on the formwork 30 using the fixing nail 23. If this position setting is inappropriate, simply pull out the insert 100A and change its position. Even if the position is changed in this way, the insulation material 4
0 will not cause any fatal damage.

When the head 11 of the insert main body 10 is struck with a hammer or the like against the insert 100A positioned in this way, the cylindrical body portion 22 will be attached to the heat insulating material 4.
Penetrate into it while shearing 0. As a result, if the lower end of the cylindrical body portion 22 comes into contact with the upper surface of the formwork 30, further driving of the insert body 10 becomes difficult, and the fixing nails 23 of the fixing tool 20
is pushed into the formwork 30 by a predetermined amount. At this time, the lower surface of the fixing body 21 comes into contact with the upper surface of the heat insulating material 40 for the first time, and the cylindrical portion 22 of the fixing tool 20
completely shears a portion of the insulation 40 as shown in FIG. In addition, the fixing body 21 of the fixture 20
is only in contact with the upper portion of the remaining portion 42 of the heat insulating material 40 that has been sheared at the cylindrical body portion 22, and is not compressed. In this way, insert 100
After fixing A to the formwork 30, insert 1
The state shown in FIG. 1 is that concrete is poured around 00A and the heat insulating material 40 to form a concrete slab 50.

In the shearing of the heat insulating material 40 by the cylindrical body portion 22 described above, the heat insulating material 40 is of course made of a porous and soft material such as a synthetic resin such as styrofoam. This can be done smoothly even when the material 40 is made of a relatively hard material such as a wood wool board. In other words, in the case of the fixture 20 used in this insert 100A, the heat insulating material 40 is sheared only by press-fitting the cylindrical body 22, and the heat insulating material 40 located inside the cylindrical body 22 is sheared. This is because there is no need to compress it at all. Therefore, regardless of the material of the heat insulating material 40, the insert 100A
Holes for bolt insertion are formed in this heat insulating material 40 without any restrictions.

Once the concrete slab 50 is solidified as described above, the formwork 30 is removed. FIG. 5 shows this state. This removal operation is extremely easy. That is, in the case of the fixing tool 20, only a part of the fixing body 21 and the cylindrical body part 22 are inserted and inserted into the recess 16 of the insert body 10 so as to be freely inserted and removed, and the shoulder of the cylindrical body part 22 is inserted into the recess 16 of the insert body 10. Part 2
2a merely contacts the lower surface of the flange portion 15. Moreover, the remaining portion 42 of the heat insulating material 40 located below the fixture 20 has already been completely sheared with respect to other parts, and the formwork 30 is fixed to the heat insulating material 40 or the concrete slab 50 side. Since it is not in its original condition, this removal work is extremely easy.

After removing the formwork 30 in this way, the heat insulating material 4 located under the insert 100A
A shearing port 41 is formed at 0, and the remaining portion 42 of the heat insulating material 40 corresponding to the shearing port 41 is formed between the formwork 30 and the fixture 20.
remains between. That is, the remaining portion 42 is attached to the fixture 2
It remains housed in the cylindrical body part 22 that constitutes 0. As shown in FIG. 6, this cylindrical body part 22 can be easily removed from the formwork 30 side by pushing out the notch 24 with the tip of a driver 62, etc., and thereby the remaining part 42 can be exposed. (See FIG. 7) Furthermore, even if the heat insulating material 40 is made of wood wool, the remaining portion 42 can be easily removed using a sharp tool. The fixing nail 23 that is still fixed to the formwork 30 is the eighth
As shown in the figure, a part of the nail puller 60 is placed below the fixed body 21 and can be easily removed by prying it like a lever.

Note that the above is substantially the same for inserts 100B and 100C.

(Example) In the above example, the upper part of the fixed body 21 is wrapped around the cylindrical body part 22. However, the present invention is not limited to this, and as shown in FIG. The upper end portion may be locked to a shoulder portion 21c formed on the lower side of the fixed body 21. Further, a first
It is also possible to form an inclined surface 22b as shown in FIG. In this case, the inclined surface 22b makes it possible to shear the heat insulating material 40 even more easily.

Furthermore, as shown in FIG. 11, it is preferable that the cut 24 of the cylindrical body part 22 is not just a straight line, but a hole 22c is formed in a part thereof to facilitate insertion of a tool. By using this hole 22c, when removing the fixture 20 from the formwork 30, the work can be facilitated.

(Effect of the invention) As explained above, insert 1 according to the invention
According to 00A, 100B or 100C, there is no need to form holes in the insulation for insertion of inserts. Therefore, the work of fixing the insert to the formwork can be carried out extremely easily.

In addition, the formwork can be easily removed from the insert according to the present invention fixed in a concrete slab because the fixing tool of the insert is relatively easily locked to the main body. Not only that, but also because the notch 24 is formed in the cylindrical body part 22 constituting the fixture, the cylindrical body part 22 can be easily removed using this notch 24 without damaging it. . Therefore, the fixture constituting the insert can be easily removed from the formwork, and the removed fixture can be reused.

In addition, regarding the fixture 20 used for this insert 100A, 100B or 100C,
The heat insulating material 40 is sheared only by press-fitting the cylindrical body 22, and there is no need to actively compress the heat insulating material 40 located within the cylindrical body 22.
No matter what the material of the insulation material 40 is,
The insert 100A, 100B or 100
C can form bolt insertion holes in this heat insulating material 40 without any restrictions.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the insert according to the present invention;
Fig. 2 is an exploded perspective view of the fixture, Fig. 3 is a longitudinal sectional view corresponding to Fig. 1 showing another embodiment, and Fig. 4 is a longitudinal sectional view corresponding to Fig. 1 showing yet another embodiment. It is a diagram. Each of FIGS. 5 to 8 is a longitudinal sectional view for sequentially explaining the insert fixing operation and the fixing tool removal operation. Also, Figures 9 to 1
FIG. 0 is a longitudinal section showing another embodiment of the cylindrical body portion constituting the fixture, and FIG. 11 is a perspective view thereof. moreover,
FIG. 12 is a longitudinal sectional view for explaining a conventional insert. Explanation of codes, 100A, 100B, 100C...
...Insert, 10...Insert body, 11...
...Head, 12...Natsu, 13...Torso, 14...
...Bolt insertion hole, 15...Flange part, 16...
Recess, 17... Guide hole, 10a... Driving tool,
10b...Support, 20...Fixing tool, 21...Fixing body, 22...Cylinder part, 23...Fixing nail, 24
... cut, 30 ... formwork, 40 ... insulation material, 5
0...Concrete slab.

Claims (1)

[Claims for Utility Model Registration] An insert consisting of an insert body and a fixture that is assembled to the insert body and fixes the insert body on a formwork with a heat insulating material in between, wherein the fixture is attached to the insert body. A cylindrical part that is fitted and supported at the upper part in a recess formed in the central lower surface of the cylindrical part and has an axial notch, a fixed body that is fitted and supported at the inner upper end of this cylindrical part, and An insert comprising a fixing nail provided at a lower part and protruding outward from the lower end of the cylindrical body part.