JP7410541B2 - Anchor bolts, washers, and foam building materials - Google Patents

Description

The present invention relates to anchor bolts, washers, and foam building materials.

An example of an anchor bolt using a foam material is one described in Patent Document 1 below. In this method, the embedded part of the anchor bolt is coated with a resin foam, the coating layer is impregnated with a room temperature thermosetting resin composition, and this is inserted into a drilled hole and hardened.

On the other hand, as a building material using a conventional foam material, there is one described in Patent Document 2 below. This is made by laminating an unfoamed foamable synthetic resin on the back side of a base material, which is heated with a hot air generator to foam after construction.

Japanese Unexamined Patent Publication No. 54-128128 Japanese Patent Application Publication No. 57-130654

However, in the prior art of Patent Document 1 mentioned above, since a room temperature thermosetting resin is used, it takes several days to harden. Furthermore, the conventional technique disclosed in Patent Document 2 requires a hot air generator and takes time to sufficiently harden depending on the construction site.

The present invention focuses on the above points, and its purpose is to sufficiently foam in a short time. Other purposes are to obtain good strength, waterproofness, moisture resistance, heat insulation, sound insulation, etc.

The anchor bolt of the present invention includes a bolt and a sleeve, and the sleeve has an enlarged diameter portion that is enlarged in diameter by a tapered head of the bolt, and the anchor bolt has an enlarged diameter portion between the bolt and the sleeve. The present invention is characterized in that a foam is provided and the foam is foamed by applying electricity between the bolt and the sleeve to generate heat in the bolt or the sleeve.

According to one of the main embodiments, a foaming hole is provided in the sleeve, and a foaming agent is discharged from the foaming hole during foaming. Alternatively, a washer is provided that is electrically joined to the sleeve and joined to the bolt with an insulator interposed therebetween, and a power source is connected between the washer and the bolt to supply electricity. shall be. According to another embodiment, the energization is performed by a portable or portable power source. According to yet another embodiment, the sleeve is provided with a reduced diameter portion. Furthermore, a slit is provided in the reduced diameter portion.

The washer of the present invention is a washer for use with any of the above-mentioned anchor bolts, and is characterized in that the portion joined to the sleeve is a conductor, and an insulator is provided between the conductor and the bolt. shall be. According to one of the main embodiments, the washer includes a conductive washer body and an insulating plate, and the washer body is provided inside the insulating plate to insulate the washer body and the bolt. It is characterized by having a cylinder inserted into the hole. According to another embodiment, the washer is provided with a pin for attaching a current-carrying clip.

These and other objects, features, and advantages of the present invention will become apparent from the following detailed description and accompanying drawings.

According to the present invention, the heating element that generates heat when energized is provided with a foam. Specifically, a foam is provided between the bolt and the sleeve of the anchor bolt, and electricity is applied between the bolt and the sleeve to generate heat in the bolt or the sleeve, thereby foaming the foam. I decided to let him do it. Thereby , foaming can be carried out sufficiently in a short time, and good strength, waterproofness, moisture resistance, heat insulation, sound insulation, etc. can be obtained.

1 is a perspective view showing the structure of Example 1 of the anchor bolt of the present invention. FIG. 3 is a diagram showing the effect of the first embodiment. FIG. 3 is a diagram showing the effect of the first embodiment. It is a perspective view showing Example 2 of the building material of the present invention. FIG. 7 is a perspective view showing another structure of Example 2. FIG. 7 is a main sectional view showing Example 3 of another anchor bolt of the present invention. FIG. 6 is a main sectional view showing a fourth embodiment of another anchor bolt of the present invention. It is a figure which shows Example 5 of the insulating washer of this invention.

Hereinafter, the best mode for carrying out the present invention will be described in detail based on Examples.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows the overall structure of the anchor bolt of this embodiment. In the figure, an anchor bolt 100 has a structure in which a bolt 110 passes through a sleeve 120. The bolt 110 includes a tapered head 114 at the tip of a threaded portion 112, and the sleeve 120 has an enlarged diameter portion 122 on the tapered head 114 side. The enlarged diameter portion 122 includes a plurality of slits 124 in the axial direction, and minute irregularities are formed on the outer peripheral surface. The above points are similar to known anchor bolts.

In this embodiment, foam holes 126 are provided in the sleeve 120 at appropriate intervals, and a foam 130 is placed inside the sleeve 120. As the foam 130, a foaming agent in a state before foaming is used, and in the illustrated example, it has a cylindrical shape.

An insulating washer 140 is installed at the lower end of the bolt 110. The insulating washer 140 has an insulating tube 144 provided inside the washer body 142, thereby electrically insulating the washer body 142 and the bolt 110. The insulating cylinder 144 is preferably made of heat-resistant material, such as Teflon (registered trademark) or Bakelite.

Next, the operation of this embodiment will be explained with reference to FIGS. 2 and 3. An embedded hole 152 of an appropriate diameter is formed in advance in the concrete 150 in which the anchor bolt 100 is installed. As shown in FIG. 2(A), the bolt 110 is inserted into the embedded hole 152, and the sleeve 120 is inserted into the embedded hole 152 and the bolt 110. In this state, the nut 154 is screwed onto the threaded portion 112 of the bolt 110, and the sleeve 120 is raised. Then, as shown in FIG. 2B, the expanded diameter portion 122 of the sleeve 120 becomes expanded in diameter by the tapered head 114 of the bolt 110. The above procedure is the same as for a general anchor bolt.

Next, in this embodiment, the nut 154 is removed from the threaded portion 112 of the bolt 110, and the insulating washer 140 (washer body 142 and insulating cylinder 144) is attached in its place. Then, the washer body 142 of the insulating washer 140 comes into contact with the sleeve 120. If necessary, the insulating washer 140 is fixed to the threaded portion 112 with a nut 154. Then, as shown in FIG. 3(C), a power supply 158 supplies electricity between the washer body 142 and the lower end of the bolt 110. The power source 158 may be either alternating current or direct current.

Then, as shown by the arrow in the figure, current flows from the washer body 142 to the bolt 110 via the sleeve 120. Then, the bolt 110 and sleeve 120 generate heat due to resistance heating. Then, the foam 130 is heated, foams and expands, and pops out from the foam hole 126 formed in the sleeve 120, creating a space between the anchor bolt 100 and the embedded hole 152, as shown in FIG. 3(D). will also be filled in.

After anchor bolt 100 is fixed in concrete embedded hole 152 in this manner, a suitable metal fitting such as a hanger (not shown) is attached to threaded portion 112 of bolt 110.

As described above, according to this embodiment, the foam 130 is provided in the sleeve 120, and electricity is applied between the sleeve 120 and the anchor bolt 100 using the insulating washer 140 to foam the foam 130. Therefore, we decided to fill the gap between the anchor bolt 100 and the embedded hole 152 with foamed resin.
a. Sufficient foaming can be achieved in a short time.
b. The joint strength between the anchor bolt 100 and the concrete 150 is improved.
c. Water is less likely to enter the embedded hole 152, improving waterproofness and moisture resistance. For example, it is possible to effectively prevent deterioration in rust quality and decrease in service life due to water gushing out from bedrock or hot spring water during tunnel construction.
This effect can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is an example in which the present invention is applied to a building material, and a foamed building material 200 includes a foamed material 220 provided on at least one of the front and back sides of a conductive plate 210 that generates heat when energized. The conductive plate 210 may be a steel plate, a corrugated plate, a mesh steel plate, etc., and if necessary, a tap 212 for energization may be provided. The foamed building material 200 is inserted into a gap 252 in a building 250, for example, as shown in FIG. When the power source 254 is connected to the remote end of the conductive plate 210 and energized as shown in FIG. 220 foams to fill the gap with 252. As a result, effects such as soundproofing, sound insulation, moisture proofing, waterproofing, and heat insulation can be obtained.

In addition, like the foamed building material 200A shown in FIG. 5, for example, three pieces of corrugated steel plates 210A, 210B, and 210C for roofing are pasted together in a crosswise manner (so that the directions of the waves are alternate). It may also be a panel filled with foam 220A, 220B between them. This increases the strength of the panel and allows wiring and piping to be easily installed on the outside. Such panels can be used as radio wave blocking panels, partition panels, and exterior wall panels.

Next, a third embodiment of the present invention will be described with reference to FIG. This example is an example in which the above-described example 1 is applied to a floor surface or the ground. When the bolts 110 are embedded in the floor surface 350, water is more likely to enter than when the bolts 110 are embedded in the ceiling. Therefore, in this embodiment, a reduced diameter portion 322 is provided on the exposed side of the sleeve 320 (see FIG. 3A). When the insulating washer 140 is attached to the threaded portion 112 of the bolt 110 and energized by the power source 158 (see (B) in the same figure), the foam 130 foams (see (C) in the same figure). At this time, in this embodiment, the foam 130 foams to fill the aforementioned reduced diameter portion 322. Thereby, waterproofness can be improved.

Next, a fourth embodiment of the present invention will be described with reference to FIG. This embodiment is an improvement on the third embodiment described above, and is an example in which a slit or groove 400 is provided in the reduced diameter portion 322 on the exposed side of the sleeve 320. The slits 400 act as air vent grooves, and a plurality of slits 400 are provided as necessary. In the illustrated example, four locations are provided symmetrically. Its width, depth, and shape may be determined as appropriate. In the case of a closed and limited space, there is a possibility that the penetration of the foam 130 may become uneven due to the relationship between the foaming pressure of the foam 130 and the sealed air pressure. Therefore, in this embodiment, by providing the slits 400, air can escape from the slits 400, and the permeation of the foam 130 during foaming can be performed well.

Next, Example 5 of the present invention will be described with reference to FIG. This embodiment is an improvement on the above-mentioned insulating washer. Figure (A) is an exploded perspective view, and Figure (B) is a main sectional view showing the installed state. As shown in FIG. 5A, the insulating washer 500 of this embodiment is composed of an outer conductive washer body 502 and an inner insulating plate 510. A pin 504 is provided on the outer peripheral side of the washer body 502. The pin 504 may have any suitable shape, but should be designed so that the current-carrying clip 520 can be easily attached thereto. The insulating plate 510 is provided with a cylinder 512 inside, which is inserted into the hole 506 of the washer body 502. This cylinder 512 corresponds to the insulating cylinder 144 described above.

When in use, as shown in FIG. 5(B), the cylinder 512 of the insulating plate 510 is inserted inside the washer body 502 and attached to the threaded portion 112 of the bolt 110. This electrically insulates washer body 502 and bolt 110. Thereafter, if necessary, the insulating washer 500 is fixed to the threaded portion 112 with a nut 154. Then, a clip 520 is attached to the pin 504 of the washer body 502, and electricity is applied. Note that the bolts 110 and nuts 154 may also be provided with pins for attaching clips.

Note that the present invention is not limited to the embodiments described above, and various changes can be made without departing from the gist of the present invention. Examples include:
(1) The structure of the anchor bolt shown in the above embodiment is an example, and can be applied to various known anchor bolts.
(2) In the above embodiments, cylindrical or plate-shaped foams were shown, but liquid or paste-like foams may be applied, or sheet-, tape-, capsule-, gel-, etc. It may have an appropriate shape depending on the situation. When forming into capsules, powder or pellets of a blowing agent are filled into capsules that dissolve by heat. As the foaming agent, various known foaming agents can be used, and a fluorescent foaming agent mixed with a fluorescent chemical may be used, or a rust preventive agent, a preservative, etc. may be mixed therein.
(3) The insulating washer 140 of the above embodiment may have various shapes and structures as long as the sleeve 120 can be energized and generate heat by resistance heating. Further, the washer body 142 may be provided with a tap for energization.
(4) As a power source for resistance heating, it may be possible to energize a plurality of heating objects at the same time, or the power source may be of a portable type so that it can be easily carried around.
(5) In the above-mentioned embodiment, an IC chip may be embedded in the foam, which records processing conditions such as the material used and the amount of current applied. By reading this, you can know the details of the work during construction.
(6) In buildings etc., resonance may be prevented by applying the present invention.

According to the present invention, a foam is provided between the bolt and the sleeve of the anchor bolt, and electricity is applied between the bolt and the sleeve to generate heat in the bolt or the sleeve, thereby increasing the foam. I decided to foam it. This allows sufficient foaming to be carried out in a short time and provides good strength, waterproofness, moisture resistance, heat insulation, sound insulation, etc., making it suitable for various types of anchor bolts .

100: Anchor bolt 110: Bolt 112: Threaded portion 114: Tapered head 120: Sleeve 122: Expanded diameter portion 124: Slit 126: Foam hole 130: Foam 140: Insulating washer 142: Washer body 144: Insulating tube 150: Concrete 152 : Hole 154: Nut 158: Power supply 200, 200A: Foam building material 210: Conductive plate 210A, 210B, 210C: Corrugated steel plate 212: Tap 220, 220A, 220B: Foam 250: Building 252: Gap 254: Power supply 320: Sleeve 322: Reduced diameter part 350: Floor surface 400: Slit 500: Insulating washer 502: Washer body 504: Pin 506: Hole 510: Insulating plate 512: Cylinder 520: Clip

Claims (11)

An anchor bolt comprising a bolt and a sleeve, the sleeve having an enlarged diameter portion whose diameter is enlarged by a tapered head of the bolt,
Providing a foam between the bolt and the sleeve,
An anchor bolt characterized in that the foam is foamed by applying electricity between the bolt and the sleeve to generate heat in the bolt or the sleeve. The anchor bolt according to claim 1, wherein a foaming hole is provided in the sleeve, and a foaming agent is discharged from the foaming hole during foaming. a washer electrically connected to the sleeve and connected to the bolt with an insulator interposed therebetween;
The anchor bolt according to claim 1 or 2, characterized in that a power source is connected between the washer and the bolt to supply electricity. The anchor according to any one of claims 1 to 3, wherein the foam is in the form of a liquid, a paste, a sheet, a tape, a plate, a rod, a cylinder, or a capsule. bolt. The anchor bolt according to any one of claims 1 to 4, wherein the energization is performed by a portable or portable power source. The anchor bolt according to any one of claims 1 to 5, characterized in that an IC chip storing the materials and energization conditions used during construction is embedded in the foam. The anchor bolt according to any one of claims 1 to 6, wherein the sleeve is provided with a reduced diameter portion. The anchor bolt according to claim 7, wherein a slit is provided in the reduced diameter portion. A washer for use in the anchor bolt according to any one of claims 1 to 8,
The part joined to the sleeve is a conductor,
A washer characterized in that an insulator is provided between the conductor and the bolt. The washer is composed of a conductive washer body and an insulating plate, and a cylinder is provided inside the insulating plate to be inserted into a hole in the washer body in order to insulate the washer body and the bolt. The washer according to claim 9, characterized in that: The washer according to claim 9 or 10, characterized in that the washer is provided with a pin for attaching a current-carrying clip.

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