JPH0224813Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an insert for a deck plate, and more specifically, when pouring concrete into the ceiling of a building using a deck plate as a formwork.
Inserts for deck plates (hereinafter simply referred to as inserts) are fixed to this deck plate and are buried in the surface layer of the poured concrete layer to suspend specified pipes, equipment, etc. from the ceiling surface. It is related to.

(Prior Art) As an example of this type, an anchor for attaching a hanging bolt described in Japanese Utility Model Publication No. 52-16010 has been known.

In this example, a threaded bolt is provided protruding from the upper end of a cylindrical body with a female thread formed on the inner peripheral surface, and several upwardly sloping locking pieces are provided integrally with the bolt on the outer peripheral surface of the lower end of the bolt. A cap-shaped obturator with a cylindrical body protruding from the back of its center is fitted onto this bolt, and a nut is screwed into the bolt, and by tightening the nut, the lower end of the obturator's body engages the bolt. It is constructed so that the pieces can be pushed open.

(Problem to be solved by the invention) Conventionally, the situation was as described above, so when the obturator was attached to the deck plate and fixed, the body of the synthetic resin obturator pushed open the latching piece of the cylindrical body. Since the latch piece is attached with a cylindrical shape, stress is constantly applied to the latch piece, and the latch piece and obturator deteriorate over many years of use, reducing the pressing force of the latch piece to the deck plate. The adhesion force between the main body and the deck plate decreases, and the supporting force between the device attached to the cylindrical body and the deck plate decreases, increasing the risk of the device falling.

The above points were problematic.

In view of these shortcomings, the present invention has been designed to ensure that the adhesion between the insert and the deck plate does not deteriorate even after many years of use, and that the device attached to the insert can be reliably supported by the deck plate, making it easier to attach the device to the deck plate. The purpose of this invention is to provide an insert that can be inserted reliably and quickly.

(Means for Solving the Problems) In the present invention, one side of a cylindrical body formed with a support hole for inserting a suspension bolt inside is closed with a female screw portion inside, and the other side of the cylindrical body is closed. An elastic piece that can be expanded and contracted in the diametrical direction of the cylindrical body is provided, and an insert main body having a male screw portion is provided on the outer peripheral surface of the cylindrical body between the elastic pieces on one side and the other side of the cylindrical body. A fixing nut having a female thread corresponding to the male thread of the main body is screwed into the male thread of the insert main body.

(Example) Embodiments of the present invention will be described based on the drawings.

1 and 2 show an insert according to a first embodiment of the present invention, which is composed of an insert body A and a fixing nut B. As shown in FIGS.

The insert main body A is a cylindrical body of different diameters molded from resin, and has a support hole for inserting a suspension bolt inside, and a male screw part 2 is provided in the center of the small diameter part 1 to be screwed into the fixing nut B. A substantially hemispherical collar 3 is connected to the lower end of the small diameter part 1, and a plurality of collars (4 in the embodiment) are provided between the lower end of the small diameter part 1 and the male screw part 2.
Elongated holes 4 are provided in the axial direction at equal intervals in the circumferential direction, so that a plurality of elastic pieces 5 are provided at the lower end of the small diameter portion 1 of the insert body A.

A hexagonal nut 8 and a hexagonal plate-shaped lid 9 are fitted into a hexagonal nut insertion hole 7 provided in the large diameter portion 6 at the upper end of the cylindrical body, respectively, and are fixed to the large diameter portion 6. One side of the body is occluded.

In order to fix an insert having such a configuration to the deck plate P, first, a mounting hole 10 is bored at a predetermined position in the deck plate P, as shown in FIGS. 3 and 4. The diameter of this attachment hole 10 is slightly larger than the outer diameter of the small diameter portion 1 of the insert main body A, and smaller than the diameter of the collar 3.

Then, screw the fixing nut B onto the male threaded part 2 of the insert body A, positioning it slightly above the position when fixing it, and press the collar 3 side of the insert body A from above the deck plate P into the mounting hole 10. Let me touch you,
Insert main body A into mounting hole 1 in the same state.
Push it into 0. At this time, an external force in the direction perpendicular to the axis of the insert body A is applied to the plurality of elastic pieces 5 on which the collar 3 is provided, causing the diameter to contract momentarily and the collar 3 to be attached to the mounting hole 1.
0 and immediately after the collar 3 passes through the attachment hole 10, it returns to its original shape due to the elasticity of the elastic piece 5 itself (see FIG. 3). After that, when the fixing nut B is manually tightened using the handle 11, the upper end surface of the collar 3 and the lower end surface of the fixing nut B come into contact with the lower and upper surfaces of the deck plate P, respectively, and clamp the deck plate P. In this state, the insert is firmly fixed to the deck plate P (see FIG. 4). At this time, the elastic piece 5 having the collar 3 is in a normal state, and no stress is applied thereto.

Incidentally, reference numeral 12 in FIG. 4 indicates a hanging bolt whose upper end is screwed into the female screw portion 13 of the hexagonal nut 8.

5 to 8 show an insert according to a second embodiment of the present invention, which is composed of an insert body A' and a fixing nut B.

This insert body A' is molded from resin, and has a support hole for inserting a hanging bolt formed inside the cylindrical body 14, and a hexagonal fitting body 15 having a hexagonal nut insertion hole 19 at the upper end of the cylindrical body 14. A male screw portion 16 is provided in the center of the cylindrical body 14 to be screwed into the fixing nut B, and long holes 17 are provided in the axial direction at opposing positions in the lower end of the cylindrical body 14. A lower end portion of the elastic tongue piece 18 is connected to the cylindrical body 14 at the lower end of the elongated hole 17 . When an external force is applied to each elastic tongue piece 18 in a direction perpendicular to the axis of the cylindrical body 14, each elastic tongue piece 18 slightly rotates about its base end and enters the elongated hole 17. When the external force is released, the elastic tongue piece 18 The tongue piece 18 returns to its original shape due to its own elasticity.

Hexagonal nut insertion hole 19 of hexagonal nut fitting body 15
A hexagonal nut 8 and a lid 20 are respectively fitted and fixed to the cylindrical body 14, and one side of the cylindrical body 14 is closed by the lid 20.

In order to fix the insert with such a configuration to the deck plate P, as shown in FIG.
Position it slightly above when it is fixed and screw it together, and insert the insert body from above the deck plate P.
The lower end side of the cylindrical body 14 of A' is brought into contact with the mounting hole 10, and the insert main body A' is pushed into the mounting hole 10 in that state. At this time, the two opposing elastic tongues 18 provided on the cylindrical body 14 have
When an external force is applied in the direction perpendicular to the axis of the cylindrical body 14, the two elastic tongues 18 momentarily approach each other and pass through the attachment hole 10. Immediately after the two elastic tongues 18 pass through the attachment hole 10, The elastic tongue pieces 18 are restored to their original shape by their own elasticity. After that, handle 11
When the fixing nuts B are tightened by hand using the Fixed. At this time, the elastic tongue piece 18 is in its normal state,
This is a state where no stress is applied.

In addition, in the above embodiment, the insert body A,
One side of the cylindrical body A' has a larger diameter than the cylindrical body as a large diameter portion 6 and a hexagonal fitting 15, but the head may have the same diameter as the cylindrical body.

(Effects of the invention) Since the invention has the above configuration, it has the following effects.

(1) Insert the elastic piece of the insert body into the mounting hole of the deck plate that has a mounting hole, and use the restoring force of the elastic piece to return the elastic piece to its original shape on the back side of the deck plate, and then insert the male screw part of the insert body. By screwing the fixing nut into the
The insert can be fixed to the deck plate by sandwiching the deck plate between the upper end surface of the elastic piece of the insert body and the lower end surface of the fixing nut.
When fixed, the elastic piece is in a state where no stress is applied, so the elastic piece will not deteriorate even after many years of use, and the adhesion force between the insert and the deck plate will not decrease, so the insert The equipment to be mounted is securely supported by the deck plate and is safe.

(2) During fixing work, the insert can be fixed to the deck plate simply by pushing the insert body into the mounting hole of the deck plate and tightening the fixing nut in that state, so the work can be done reliably and quickly.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the insert of the first embodiment of the present invention, Fig. 2 is a half-sectional front view of the insert, and Fig. 3 is the same, showing the flange of the insert body A passed through the mounting hole of the deck plate. 4 is a cross-sectional view of the insert fixed to the deck plate, FIG. 5 is an exploded perspective view of the insert of the second embodiment of the present invention, and FIG. 6 is a half-sectional front view of the same. 7 is an enlarged perspective view of the insert cut away along the - line in FIG. 6, and FIG. 8 is a sectional view of the insert fixed to the deck plate. Explanation of symbols of main parts, A...Insert body, B...Fixing nut, 2...Male thread part, 5...
Elastic piece, 13...Female screw part.

Claims (1)

[Scope of utility model registration request] One side of a cylindrical body formed with a support hole for inserting a hanging bolt is closed with a female screw portion 13 on the inside, and an elastic piece 5 that can be expanded and contracted in the diameter direction of the cylindrical body is provided on the other side of the cylindrical body. is provided, and an insert main body A having a male screw portion 2 is provided on the outer peripheral surface of the cylindrical body between the elastic piece 5 on one side and the other side of the cylindrical body,
This insert for a deck plate is made by screwing a fixing nut B provided with a female thread corresponding to the male thread part 2 of the insert main body A into the male thread part 2 of the insert main body A.