JP2024038959A - insert for deck plate - Google Patents

Abstract

To provide an insert for deck plates that enables efficient and safe installation of bolts protruding downward from a floor or screw holes exposed on a floor surface as fastening parts for screws to directly fix lighting, facility stands or the like under concrete floors where deck plates are used, and also that provides high work efficiency when assembling products.SOLUTION: An insert for a deck plate is inserted through an open hole provided in the deck plate from above and attached to the deck plate, and comprises, in an anchor with a flange-shaped head, and a shank having a screw hole at a lower end, an insert body having a washer, and a coil spring that presses the washer onto an upper surface of the deck plate between the washer and the flange-shaped head at an outer periphery of the shank, and an engagement member integrally formed with a mounting portion having a screw portion for screwing into the screw hole in the anchor, and an expandable and contractible engagement piece that straddles the open hole and contacts a lower surface of the deck plate when the insert is mounted through the open hole in the deck plate on an outer surface of the mounting portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to a deck plate insert for directly attaching and fixing lighting, equipment frames, etc. to the underfloor of a concrete floor structure using deck plates.

As shown in Patent Document 1, a conventional insert for a deck plate includes an insert main body consisting of a shank having a brim-shaped head and a female thread at the lower end, and a washer member and a spring member attached to the outer periphery of the shank. and a cylindrical member provided with an overhanging portion that can extend outward in the outer circumferential direction when inserted into the deck plate and installed, and the cylindrical member is attached to the insert main body by screwing into a female threaded portion of the insert main body. A configuration is disclosed in which the temporary fixing member is included.
To use the method, before pouring concrete, a cylindrical member is pushed downward into a through hole drilled in the deck plate, and the overhanging part contacts the bottom surface of the deck plate, and at the same time, the compressed reaction force of the spring member attached to the shaft part is applied. The washer member is pressed against the upper surface of the deck plate, and the washer member is attached with the deck plate sandwiched between them.
After concrete is poured, the temporary fixing member is rotated with a rotary tool and removed together with the cylindrical member, so that the insert body is buried in a predetermined position under the floor, and a lighting fixture or They can be fixed by fastening hexagonal bolts of a predetermined length through mounting holes provided in the base plate of the piping frame.

Further, as shown in Patent Document 2, there is provided an anchor consisting of a flange-shaped head and a body forming a bolt shaft at the lower end, a washer and a coil spring attached to the outer periphery of the body of the anchor, and a coil spring attached to the lower surface of the deck plate. A cylindrical engaging member is formed in which three expandable and contractible engaging pieces are formed on the upper end circumference, and a threaded groove is formed on the inner wall to be screwed into the bolt shaft, and the engaging member is attached to the bolt shaft. A configuration configured by screwing and connecting is disclosed.
To use the method, before pouring concrete, push the engaging member downward into the through hole drilled in the deck plate, and the engaging piece contacts the lower surface of the deck plate, and the washer is released by the compressive force of the coil spring attached to the anchor body. is pressed against the upper surface of the deck plate, and installed with the deck plate sandwiched between them. After concrete is poured, the engaging member is manually rotated and removed from the bolt member, and the bolt is placed in the specified position under the floor. It is arranged in a downwardly protruding state, and can be fixed by tightening a nut to the bolt through a mounting hole provided in the board of the lighting equipment or piping mount.

In both Patent Documents 1 and 2, the anchor is attached to the deck plate in advance to provide a screw fastening part on the concrete floor, and after concrete is poured, the anchor to be buried becomes a concrete anchor, and in Patent Document 1, the anchor is The screw hole provided in the part is exposed to the floor surface, and in Patent Document 2, the bolt protrudes downward from the floor, and the material to be fixed can be fastened and fixed with a hexagonal bolt or hexagonal nut. It is something.

In the above conventional method, in Patent Document 1, the cylindrical member is removed by loosening the temporary fixing member (hexagonal bolt), so two parts come off together with the cylindrical member, so it is difficult to remove the cylindrical member at an unstable high place. Since this is also work, there is a possibility that parts may separate and fall, resulting in a major disaster. Furthermore, there were also problems such as the large number of parts, making assembly of the product extremely complicated.

In Patent Document 2, since the engagement member and the anchor are connected by screws to the bolt shaft, it is necessary to remove the engagement member from the bolt shaft that protrudes downward from under the concrete floor after concrete is poured. It is necessary to manually rotate the engaging member, and the work is performed at an unstable height, which takes time and reduces work efficiency. Further, there were also problems in that the assembly of the product was very complicated due to the screw connection.

JP 2019-60106 Publication Design registration No. 1524890

The present invention was made in view of the above-mentioned conventional problems, and is used as a fastening part for screws for directly fixing lighting, equipment frames, etc. under a concrete floor using a deck plate. To provide an insert for a deck plate, which enables efficient and safe installation of screw holes exposed on the floor surface and has good working efficiency when assembling the product.

The first structure is an insert for a deck plate that is inserted into a through hole drilled in a deck plate from above and attached, and the anchor includes a brim-shaped head and a body having a screw hole at the lower end, and the body is attached to the anchor. an insert body equipped with a washer on the outer periphery of the insert body, a coil spring between the washer and the brim-shaped head for pressing the washer against the upper surface of the deck plate, and a mounting having a threaded part to be screwed into the threaded hole of the anchor. and an expandable/contractable engagement piece that straddles the through hole and comes into contact with the lower surface of the deck plate when the deck plate is inserted through the through hole and attached to the outer surface of the attachment portion. It is characterized by comprising an engaging member.

A second configuration is characterized in that the engaging member fits into a socket of a rotary tool.

The third configuration is an insert for a deck plate that is inserted into a through hole drilled in a deck plate from above and attached, and the anchor includes a brim-like head and a body having a bolt shaft at the lower end, and the body is attached to the anchor. an insert body equipped with a washer on the outer periphery of the anchor, a coil spring between the washer and the flanged head for pressing the washer against the upper surface of the deck plate, and a flexible piece that can be attached to and detached from the bolt shaft of the anchor. a cylindrical mounting portion provided therein; and an expandable and contractible engagement piece that straddles the through hole and abuts the lower surface of the deck plate when the deck plate is installed by inserting the through hole into the outer surface of the mounting portion. It is characterized by comprising an integrally formed engagement member.

A fourth configuration is characterized in that the engaging member fits into a socket of a rotary tool.

According to the first configuration, the engagement member has a mounting portion having a threaded portion that is threaded into the threaded hole at the lower end of the anchor of the insert body, and when the engagement member is installed by inserting the through hole of the deck plate into the outer surface of the mounting portion. Since the expandable and contractible engagement piece that straddles the hole and abuts the bottom surface is integrally formed, there is no fear that the parts will separate and fall when removing the engagement member, making it safe to work with. Since the number of points is reduced, assembly work can also be labor-saving.

According to the second configuration, since the engaging member fits into the receptacle of the rotary tool, assembly and removal can be performed easily and quickly using the rotary tool, so that work efficiency can be improved.

According to the third configuration, since the engaging member is a cylindrical attachment part surrounding the anchor's bolt shaft with a detachable flexible piece, it can be assembled by press-fitting it into the bolt shaft, so it can be assembled by press-fitting it into the bolt shaft. can be done quickly, improving the efficiency of assembly work.

According to the fourth configuration, since the engaging member fits into the socket of the rotary tool, it can be easily and quickly removed using the rotary tool, thereby improving work efficiency.

FIG. 1 is a perspective view of Embodiment 1 of the present invention. FIG. 1 is an exploded perspective view of Embodiment 1 of the present invention. They are a front view (a), a right side view (b), a top view (c), and a bottom view (d) of Embodiment 1 of the present invention. It is a figure showing the construction method of Embodiment 1 of the present invention. It is a perspective view showing Embodiment 2 of the present invention. FIG. 2 is an exploded perspective view of Embodiment 2 of the present invention. They are a front view (a), a right side view (b), a top view (c), and a bottom view (d) of Embodiment 2 of the present invention. It is a figure which shows the construction method of Embodiment 2 of this invention.

(Embodiment 1)
Embodiment 1 of the present invention will be described in detail using FIGS. 1 to 3.
The insert main body 10 includes an anchor 14 having a screw hole 13 at the lower end of a body 12 having a brim-like head 11 formed at the upper end, and a disc-shaped anchor 14 that is fitted around the outer periphery of the body 12 of the anchor 14. It is composed of a washer 15 and a coil spring 16. The coil spring 16 is disposed between the washer 15 and the flanged head 11, and when compressed, the spring's reaction force abuts against the lower surface of the flanged head 11 and presses the washer 15 toward the deck plate.
The engagement member 20 has a mounting part 21 as a base material, which is formed to have a width slightly smaller than the diameter of the through-hole so that it can be inserted through the through-hole of the deck plate, and the upper end thereof is screwed into the screw hole 13 of the anchor 14. A threaded portion 22 for attachment is formed, and engaging pieces 23, 23 extending obliquely upward are formed on the outer surface to face each other. When the pair of engaging pieces 23, 23 pass through the through-hole of the deck plate, they bend inward to reduce the width of the overhang, and after passing, they restore to their original shape and straddle the through-hole and attach to the underside of the deck plate. overhang After the locking pieces 23, 23 pass through the through hole, their upper end surfaces abut. The insert main body 10 can be attached with the deck plate sandwiched between the washer 15 pressed toward the deck plate by the reaction force of the coil spring 16 and the engaging pieces 23, 23. At the lower part of the mounting portion 21, contact pieces 24, 24 are formed facing each other to fit into a receptacle of a rotary tool. A closing piece 25 having approximately the same diameter as the body 12 of the anchor 14 is formed at the base end of the threaded portion 22 . The closing piece 25 comes into contact with the periphery of the screw hole 13 of the anchor 14 and closes the gap between the screw hole 13 and the screw portion, thereby preventing concrete slag leaking from the gap between the screw hole 13 and the through hole of the deck plate into the screw hole 13. It is possible to prevent it from adhering to the surface or its periphery. It is preferable that the engaging member 20 is made of plastic and integrally molded.

Next, a method of using Embodiment 1 of the present invention will be described using FIG. 4.
The construction procedure is shown below.
(a) Drill a predetermined through hole C in the deck plate A with a drill bit B.
(b) Attach the insert according to this embodiment to the through hole C. First, insert the engaging member 20 from the lower end side so that the engaging pieces 23, 23 bend inward to reduce the overhang width. After being pushed in and passing through, it is restored and extends over the lower surface of the deck plate A while straddling the through hole, and its upper end surface abuts. The upper surface of the deck plate A is pressed against the deck plate A by the reaction force of the coil spring 16 attached to the outer periphery of the body 12 of the anchor 14, and the engaging pieces 23, 23 that come into contact with the lower surface of the deck plate A press the washer 15 toward the deck plate A. It can be installed with the .
(c) Concrete D is poured.
(d) After the concrete has hardened, the hex socket E is fitted into the mounting part 21 of the engagement member 20 from the bottom surface of the deck plate A, and the engagement member 20 is removed from the screw hole 13 of the anchor 14 by turning it. The hole 13 is exposed. Since the engaging member 20 is one integral part, there is no fear that the part will disassemble and fall.
(e) Fix the equipment frame F by screwing the fixing bolt G into the screw hole 13.

(Embodiment 2)
Embodiment 2 of the present invention will be described in detail using FIGS. 5 to 7.
In the second embodiment, only the parts that are different from the first embodiment will be explained, and the explanation of the common parts will be omitted. The second embodiment differs from the first embodiment in the configuration of the bolt shaft 170 of the insert body 100 and the engagement member 200. One end of the bolt shaft 170 is screwed into the screw hole 130 of the anchor 140, and fixed by caulking. Alternatively, the bolt shaft 170 may be formed integrally with the anchor 140, for example, by cold or hot pressing or cutting. The engagement member 200 uses a cylindrical attachment portion 210 as a base material, which is formed to have a circumferential diameter that is inserted through the through hole of the deck plate, and has a diameter that becomes slightly smaller than the threaded outer diameter of the bolt shaft 170 downward from its lower end. Three flexible pieces 220 are provided around the circumference. The inner wall of the flexible piece 220 is provided with a locking piece 260 that protrudes toward the center and locks into the thread groove of the bolt shaft 170, respectively.
That is, in the mounting part 210, when the bolt shaft 170 is pushed into the gap at the center of the flexible pieces 220 on three sides, the flexible pieces 220 are bent outward, and the gap at the center expands in diameter. Then, it is assembled at a predetermined position on the bolt shaft 170.
The locking piece 260 provided on the flexible piece 220 locks into the thread groove of the bolt shaft 170 to prevent it from slipping, and since it follows the thread groove, it can also play the role of a screw. It can also be removed from the shaft 170.
Three engaging pieces 230 are formed diagonally upward from the outer surface of the attachment portion 210 at equal intervals. When these engaging pieces 230 pass through the through holes of the deck plate, they bend inward and contract in diameter, and after passing, they restore and extend over the lower surface of the deck plate while straddling the through holes, so that their upper end surfaces are The deck plate is sandwiched between the washer 150 which is in contact with the washer 150 and is urged toward the deck plate by the reaction force of the coil spring 160. A contact piece 240 is formed on the outer surface of the flexible piece 220 to fit into a socket of a rotary tool.
Furthermore, a covering piece 250 having approximately the same diameter as the body 120 of the anchor 140 is formed at the upper end of the cylindrical attachment part 210, and is in contact with the periphery of the screw hole 130 of the anchor 140 to cover the bolt shaft 170. To prevent concrete slag leaking from the gap between the deck plate and the through hole from adhering to the thread groove of the bolt shaft 170. It is preferable that the engaging member 200 is made of plastic and integrally molded.

Next, a method of using Embodiment 2 of the present invention will be explained using FIG. 8.
The construction procedure will be shown below, but steps (a) to (c) are the same as in Embodiment 1 and will therefore be omitted.
(d) After the concrete has hardened, the engaging member 20 is removed from the bolt shaft 170 by fitting the hexagonal socket E into the flexible piece 220 at the lower end of the mounting portion 210 of the engaging member 200 from the lower surface of the deck plate A and turning it. Remove it to expose the bolt shaft 170. Since the engaging member 200 is a single integral part, there is no fear that the part will disassemble and fall.
(e) Attach the equipment frame F to the bolt shaft 170 and fasten it with the fixing nut H to fix it.

10, 100 Insert body 11, 110 Flange-shaped head 12, 120 Body 13, 130 Screw hole 14, 140 Anchor 15, 150 Washer 16, 160 Coil spring 170 Bolt shaft 20, 200 Engagement member 21, 210 Mounting part 22 Screw Part 220 Flexible pieces 23, 230 Engagement pieces 24, 240 Contact piece 25 Closure piece 250 Covering piece 260 Locking piece A Deck plate B Drill bit C Through hole D Concrete E Hex socket F Equipment frame G Fixing bolt H Fixing nut

Claims (4)

An insert for a deck plate that is installed by inserting it from above into a through hole drilled in the deck plate,
An anchor including a flanged head and a body having a screw hole at the lower end, a washer on the outer periphery of the body, and a washer pressed against the upper surface of the deck plate between the washer and the flanged head. An insert body equipped with a coil spring,
a mounting part having a threaded part to be screwed into the screw hole of the anchor; and a mounting part having a threaded part that is screwed into the screw hole of the anchor; 1. An insert for a deck plate, comprising an engaging member in which the contacting expandable and contractible engaging pieces are integrally formed. The deck plate insert according to claim 1, wherein the engaging member fits into a socket of a rotary tool. An insert for a deck plate that is installed by inserting it from above into a through hole drilled in the deck plate,
An anchor including a flanged head and a body having a bolt shaft at a lower end, a washer on the outer periphery of the body, and a washer pressed against the upper surface of the deck plate between the washer and the flanged head. An insert body equipped with a coil spring,
A cylindrical mounting part surrounding the bolt shaft of the anchor with a flexible piece that can be attached and detached; 1. An insert for a deck plate, comprising an engaging member integrally formed with an expandable and contractible engaging piece that comes into contact with the lower surface of the deck plate. 4. The deck plate insert according to claim 3, wherein the engaging member fits into a socket of a rotary tool.

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