JPH02200936A - Insert for deck plate - Google Patents

Abstract

PURPOSE:To secure an insert with ease and perfection by providing a tapered male screw in an insert for hanging an appliance and screwing it into the prepared hole in the deck plate of a roof concrete. CONSTITUTION:At the lower edge of an insert 1, a tapered male screw 4 and an edge 5 coming in touch with the screw are provided and in the inner periphery of a hollow portion, a male screw 6 is formed in the inner periphery of a hollow portion. Next in a deck plate P, a prepared hole large enough for the tip of the male screw 4 to enter is formed. The tip of the male screw 4 is pressed in the prepared hole and a tool is inserted into a hexagon socket 7 for rotation. While the male screw 4 itself is making threading, screwing is continued for fixture until the edge 5 has come in touch with the deck plate P. After concrete is applied and is hardened, an appliance is suspended through a hanging rod 11. It is thus possible to secure the insert on the deck plate with ease and great fixing strength.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a deck plate insert (hereinafter simply referred to as an insert) that is used by being fixed to a deck plate.
It is related to.

[Conventional technology]

The deck plate functions as a formwork when pouring concrete, and is used by being attached to the ceiling of a factory or the like without being removed.

When attempting to bury inserts in concrete in order to suspend various appliances on a ceiling surface made of this deck plate, it is not possible to fix the inserts by nailing them to the deck plate itself, as can be done with wooden formwork. It is difficult to fix the insert to the deck plate.

As conventional inserts used while being fixed to such deck plates, those shown in FIGS. 8 to 1O are known.

This insert consists of an insert main body 21 having a female thread 21a formed on the inner circumferential surface of a cylindrical body whose upper end is closed, a resin cap 22 externally fitted to approximately the lower half of the insert main body 21, and an insert main body 21. A washer 23 that is slidably fitted onto the outside of the main body 21, and this one shear 2.
3 and a compression spring 24 elastically loaded between the head 21b of the insert main body 21.

As shown in FIG. 9, the upper end portion of the cap 22 is divided into a plurality of pieces along the circumferential direction to form an elastically deformable tongue piece 22a.

When the entire insert is pushed into the pilot hole 26 formed in the deck plate 25, the upper end of the cap 22 is inserted into the tongue piece 22.
The diameter of the cap 22 is reduced due to the elastic deformation of the hole 2.
6, the tongue piece 22a of the camp 22 returns to its original shape, and the de-tsuki plate 25 is sandwiched between the upper end surface of the cap 22 and the washer 23 by the elastic restoring force of the compression spring 24. Then, the insert is fixed to this deck plate 25.

In this way, conventional inserts are composed of a large number of parts, resulting in a complex structure and increased cost.In addition, they have a structure in which the deck plate is inserted and fixed from above and below using the elastic restoring force of a compression spring. Therefore, there was a problem in that if an external force was applied to the insert, it would easily come off.

[Problem to be solved by the invention]

An object of the present invention is to simplify the structure of the insert so that it can be easily and reliably fixed to a deck plate.

[Means for Solving the Problems] The insert according to the present invention is characterized in that a tapered male thread is integrally formed on the outer peripheral surface of the lower end portion of the insert body.

[Action of the invention]

To fix the insert according to the present invention to the deck plate, a prepared hole is bored in the deck plate with a size corresponding to the minimum diameter portion of the tapered male thread formed on the outer peripheral surface of the lower end of the insert body.

If you push the tapered male screw formed on the outer circumferential surface of the lower end of the insert body into the prepared hole and rotate it without tapping into this prepared hole, the tapered male screw formed on the outer circumferential surface of the lower end of the insert body will open. The male screw itself is screwed into the pilot hole while setting it up.

In this way, the deck can be installed by simply inserting the Tevar male screw formed on the outer circumferential surface of the lower end of the insert body into the pilot hole and rotating it, without having to drill into the pilot hole drilled in the deck plate. Since the insert can be fixed to the plate, the work of fixing the insert to the deck plate can be done quickly, and the insert is fixed to the deck plate by screwing the tapered male thread into the inner periphery of the prepared hole, so it can be fixed easily. Strength increases.

〔Example〕

Embodiments of the invention are shown in FIGS. 1-6.

Insert A, as shown in FIGS. 1 and 2,
A cylindrical insert main body 1 is provided with a flange 2 at its upper end, and a tapered cylindrical section 3 having an outer diameter smaller than the outer diameter of the insert main body 1 is integrally provided at its lower end. Tapered male thread 4 on the outer peripheral surface of the cylindrical part 3
This is the configuration in which .

This tapered male thread 4 has a tapered shape such that the outer diameter gradually increases from the tip to the base. A stepped portion is provided at the connection portion between the insert body 1 and the tapered cylindrical portion 3, and an abutting end surface 5 that abuts against the deck plate P is provided in this stepped portion.

The cylindrical insert main body 1 and the tapered cylindrical portion 3 having the tapered male thread 4 formed on the outer peripheral surface thereof are concentric. A female thread 6 is formed on the inner periphery of the hollow portion of the insert main body l, and this female thread 6 is connected to the hollow portion 3a of the tapered cylindrical portion 3.

Further, a hexagonal hole 7 for rotating the insert A is provided at the upper end of the insert main body 1.

In order to fix the insert A having such a configuration to the deck plate P, as shown in FIG.
Drill pilot hole 8 in. The inner diameter of this prepared hole is large enough to allow the tip of the tapered male thread 4 formed on the outer peripheral surface of the tapered cylindrical portion 3 to enter slightly.

Next, as shown in FIG. 4, the tip of the tapered male screw 4 formed on the outer circumferential surface of the lower end of the insert body L is pushed into the prepared hole 8 made in the deck plate P.

Then, as shown in FIG. 5, a hexagonal shaft-shaped rotary tool 9 is inserted into the hexagonal hole 7 provided at the upper end of the insert body l, and while pressing the insert body l against the deck plate P, the rotary tool When the insert main body 1 is rotated by 9, the tapered screw 4 formed on the outer peripheral surface of the lower end of the insert main body 1 is screwed into the prepared hole 8 while being tapped. When the tapered screw 4 is screwed into the prepared hole 8 until the contact end surface 5 provided on the insert body 1 contacts the deck plate P, the insert 8 is fixed to the deck plate P as shown in FIG. Ru.

As shown in FIG. 6, the upper end of the hanging rod 11 is inserted into the hollow portion 3a of the tapered cylindrical portion 3 protruding from the lower surface of the deck plate P, and the male thread lla of the hanging rod 11 and the insert body I are connected. Female thread 6 formed on the inner peripheral surface of the hollow part
are screwed together, thereby suspending various appliances from the ceiling surface via the hanging rod 11.

Further, as shown in FIG. 7, if a groove portion 12 is provided along the axial direction of the tapered cylindrical portion 3 in the portion of the tapered thread 4 formed on the outer peripheral surface of the tapered cylindrical portion 3,
Since the thread of the tapered screw 4 is divided along the helical line direction, the taper screw 4 can be screwed into the prepared hole 8 of the deck plate P.

In the above embodiment, a hexagonal hole 7 is provided at the upper end of the insert body 1, and a hexagonal shaft-shaped rotary tool 9 is inserted into the hexagonal hole 7 to rotate the insert A. It is also possible to make the provided flange into a polygonal shape and insert a rotary tool into the polygonal flange to rotate the insert. Various means are possible for rotating the insert.

[Effects of the Invention] According to the present invention, there is no need to tap the pilot hole drilled in the deck plate (the tapered screw formed on the outer peripheral surface of the lower end of the insert body is pushed into the pilot hole). Since the insert can be fixed to the deck plate by simply rotating it, it is possible to quickly fix the insert to the deck plate. By inserting the insert into the deck plate, the insert is fixed to the deck plate, thereby increasing the fixing strength of the insert.

As described above, according to the present invention, the simple structure of forming a tapered thread on the outer circumferential surface of the lower end of the insert body makes it possible to easily fix the insert to the deck plate, which has been considered troublesome in the past, and to fix the insert to the deck plate, which has been considered troublesome in the past. It becomes possible to perform the process reliably with fixed strength.

[Brief explanation of the drawing]

1 to 7 are diagrams for explaining the present invention, in which FIG. 1 is a cutaway perspective view of insert A according to the present invention, FIG. 2 is a front sectional view, and FIG. The figure is a cross-sectional view of the deck plate P with the prepared hole B made, and Figure 4 is
FIG. 5(a) is a front view of the state in which the tip of the tapered screw 4 formed on the outer peripheral surface of the lower end of the insert body l is pushed into the pilot hole 8 drilled in the deck plate P; FIG. In (b), the rotary tool A9 is inserted into the hexagonal hole 7 of the insert body 1, and the insert body 1 is rotated, so that the tapered screw 4 is screwed into the prepared hole of the deck plate P. Plan and front view, No. 6
The figure is a front cross-sectional view of the hanging rod 11 suspended from the insert A fixed to the deck plate P, and FIG. be. 8 to 1O are diagrams for explaining the conventional technology, in which FIG. 8 is a sectional view of a conventional insert, and FIG. 9 is a cross-sectional view of a camp 22 constituting the conventional insert.
FIG. 1θ, a partially cutaway perspective view, is a cross-sectional view of the insert attached to the deck plate 25. The explanations of the symbols of the main parts constituting the present invention are as follows. A: Insert P: Deck plate 1: Insert body 3; Tapered cylindrical portion 4: Tapered group screw Patent applicant Mirai Kogyo Co., Ltd. January 22, 1990 1999 Patent Application No. 18774 24 Title of Invention: Denki Plate Insert 3, Relationship to the Amendment Case Address of Patent Applicant: 1695 Umata, Wanouchi-cho, Anhe-gun, Gifu Prefecture l
Figure 10 5, the number of claims increased by the amendment 6, the "Detailed Description of the Invention" and "Brief Description of the Drawings" columns of the specification subject to the amendment, and the drawings Figures 8 to 11 7 , Contents of the amendment As shown in the attached sheet 8, List of attached documents (1) Drawings [Figures 8 to 11] ・・・・・・1
Circular A: The specification of the present application is amended as follows. 1. In the 5th and 6th lines of the second shell, "...As conventional inserts, those shown in Figures 8 to 10 are known." , as shown in FIGS. 9 to 11 are known. ” he corrected. 2. Page 2, line 15, ``As shown in Figure 9...
.'' is corrected to ``As shown in FIG. 10,...''. 3. On page 8, lines 4 to 12, the sentence ``In the above example, various possibilities can be considered.'' is deleted and amended as follows. [In the above embodiment, a hexagonal hole 7 is provided at the upper end of the insert body 1, and a hexagonal shaft-shaped rotary tool 9 is inserted into this hexagonal hole 7.
For example, as shown in FIG. 8, the flange 2 provided on the insert main body L is made into a polygonal shape such as a hexagonal shape, and the flange of this polygonal shape is inserted. It is also possible to rotate the insert by fitting a rotating tool on the outside of the deck bullet, and there are various ways to rotate the insert in order to screw the taper screw into the pilot hole of the deck bullet. . 4. On page 9, line 12, ``Figures 1 to 7 are...'' is corrected to ``Figures 1 to 8 are...''. 5. Page 1 O, lines 6 to 8 [...Figure 7 is a front view of insert A. J is corrected as follows. "FIG. 7 is a front view of an insert A in which a groove 12 is provided in the tapered male thread 4, and FIG. 8 is a perspective view of an insert A in which the flange 2 is hexagonal." 6. Delete the sentence "Figures 8 to 10 are cross-sectional views" in lines 9 to 14 of page 10,
Correct as shown below. 9 to 11 are diagrams for explaining the conventional technology, and FIG. 9 is a sectional view of a conventional insert;
FIG. 10 is a partially cutaway perspective view of a cap 22 constituting a conventional insert, and FIG. 11 is a sectional view of the insert attached to a deck plate 25. ”B1 Drawings 8 to 1O of the present application are amended to look like the drawings attached to this document, and a new drawing 11 is added. Note that the revised drawings Figures 9 to 11 are related to changes in the drawing numbers, and there are no changes in content, so a copy of the drawings with the changed drawing numbers written in red will be submitted. -End- Figure

Claims (1)

[Claims] An insert for a deck plate characterized by a tapered male thread integrally molded on the outer peripheral surface of the lower end of the insert body.