JPH0319404B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to objects to be fastened, such as plates, which are attached to certain types of members with screws or nails. -Relates to a method for setting nails in a temporary state in advance.

[Conventional technology]

For example, for flash plates and locks for recessed outlets that are installed on walls, pillars, etc., the screws and nails used for the installation are pre-set in a temporary state at the time of shipment from the factory, and installation work is carried out on site. There are known devices that allow this to be carried out conveniently. For example, as a temporary fixing method for screws and nails of this type, there is a method in which a pilot hole is drilled in the portion of the plate member to be tightened, and a tassel pin screw is screwed into the hole.

In addition, as other conventional technology,
As shown in the publication, a mounting hole is drilled in a continuous manner in a part of the peripheral wall of the through-hole for inserting a wooden screw, and a columnar elastic body is inserted into the mounting hole. There is one in which the wood screw inside the through hole is pressed down to prevent it from falling out.

[Problem to be solved by the invention]

However, in the former conventional example, it takes time and effort to screw the pin screw into the prepared hole drilled in the plate member.
This screwing process is time consuming and troublesome.
In addition, they often fall off or fall due to vibrations or contact with other objects during transportation.

In the latter conventional example, it is troublesome to machine a mounting hole for inserting the columnar elastic body in addition to the through hole, and the through hole and the mounting hole are in communication, so when it comes time to tighten the wooden screw, it is difficult to There is a complaint that it is not tightened straight and tends to be on the mounting hole side. In addition, a part of the rod-shaped elastic body needs to protrude from the mounting hole into the through-hole to prevent the wooden screw from coming out, so when the diameter of the through-hole changes, rod-shaped elastic bodies of various sizes are prepared to match this. It is uneconomical. Furthermore, wooden screws have heavy heads, and rod-shaped elastic bodies must have sufficient elasticity to prevent them from tilting or falling off due to vibrations or external forces. Since the holes must be set deep, the objects to be fastened having these through holes and mounting holes are disadvantageously limited to relatively thick objects.

The present invention was made to solve these problems, and aims to simplify and streamline the work of temporarily fastening screws and bolts to objects to be fastened, and to ensure that they do not fall off.

[Means to solve the problem]

In this invention, holding holes for screws and nails provided in objects to be fastened are filled with an ultraviolet ray or electron beam curable resin, and the screws and nails are held in the resin with their heads protruding and their shafts. The part is embedded so that the entire circumference is surrounded by the resin, and then the resin is cured by ultraviolet rays or electron beam irradiation.

[Effect]

When the ultraviolet ray or electron beam curable resin is in a liquid state, it is sufficient to embed screws and nails in the resin.

Ultraviolet or electron beam curable resins are cured in a short time by ultraviolet or electron beam irradiation.

When the ultraviolet or electron beam curable resin is cured by ultraviolet or electron beam irradiation, the entire circumference of the shaft of screws and nails is surrounded by the resin in a solid state, and the screws and nails can be held straight and firmly fixed, making them easier to transport. It will no longer tilt or fall off due to vibrations over time.

〔Effect of the invention〕

According to the method of the present invention, screws and nails can be simply embedded in ultraviolet or electron beam curable resin when it is in a liquid state. Compared to the time required for screwing and driving these screws, there is also no need to prepare a mounting hole for inserting an elastic body to prevent falling off, and the work can be done in an extremely short time and efficiently. Furthermore, since ultraviolet or electron beam curable resins can be cured in a short time, the temporary fixing work time can be further shortened.

In addition, UV or electron beam curable resin can be cured to a pencil hardness of 6 to 7H, so screws and nails are less likely to tilt or fall off due to vibration during transportation or contact with other objects. It can be held in a straight and firm temporary state, and when it is time to tighten or drive it, it can be tightened or driven straight.

In addition, by selecting various properties (elasticity, coloring, etc.) of the ultraviolet or electron beam curable resin,
It is of great practical value as it can be applied to all types of objects, regardless of the diameter of the holding hole of the objects to be fastened, the strength of the objects to be fastened, the material (ceramics, glass, etc.), and the thickness.

〔Example〕

The details will be explained below based on the drawings.

The drawing shows an example of temporarily fixing screws to the flash plate of a recessed outlet. 1 is a flash plate made of metal such as aluminum, copper, iron, or plastic; 2 is a screw; The cover plate 1 has an outlet exposure hole 3 in the center of it.
is opened, and screw/nail holding holes 4 having a countersunk cross section for temporarily fixing the screws 2 are opened above and below the outlet exposure hole 3.

In FIG. 3, to temporarily fasten the screws 2, first releasably bond the back plate 5 to the back surface of the flash plate 1 to close the bottom of the holding hole 4, and then fill the holding hole 4 with ultraviolet or electron beam curable resin 6. After filling the resin 6, insert the tip 2a of the screw 2 into the head 2b.
Insert in an upright position with the protruding part. Next, the resin 6 is irradiated with an ultraviolet ray or electron beam irradiation lamp 7,
The resin 6 is subjected to a curing reaction to form the screw holder 6a integrally with the flash plate 1. With this, the screws 2 are temporarily fixed in the holding holes 4, and finally the back plate 5 is peeled off.

When using the flash plate 1 to which the screws 2 have been temporarily secured, place the plate 1 against the wall or pillar so that the outlet embedded in the wall or pillar is exposed through the exposure hole 3, and tighten the screws 2. It is installed by turning the head 2b of the plug with a screwdriver and screwing the tip 2a into the bracket 8 of the outlet (see Fig. 4). At this time, it is preferable that the holding hole 4 is formed to have a dish-shaped cross section as shown in the illustrated example, since there is no fear that the screw holder 6a will be pulled out of the holding hole 4 due to the strong tightening force of the screw 2.

As the ultraviolet ray or electron beam curable resin 6,
For example, if a urethane acrylate system is used, it will have a very high viscosity due to the hydrogen bonding of the urethane bonds,
If you use a solvent-free type such as (trade name), it has a high viscosity, so it can hold the screw 2 in an upright position well even when it is uncured, and the resin 6 hardens in a few seconds, so it will harden easily. screw 2 until
I don't lean towards it. In addition, the molecular weight of polyether polyol in urethane acrylate can be softened by increasing the molecular weight between crosslinks, and even when the screw 2 is tightened forcefully, it exhibits elasticity as a spring washer, preventing loosening of the screw 2 and preventing the flash plate from loosening. It can also prevent cracking.

In the above embodiment, the screw 2 is embedded after filling the holding hole 4 with ultraviolet or electron beam curable resin 6, but instead of this, the tip 2a of the screw 2 is inserted into the back plate as shown in FIG. 5 into the holding hole 4.
Alternatively, the ultraviolet ray or electron beam curable resin 6 may be poured and filled after being stood upright inside.

In addition to the screw 2, a nail or something similar can also be used. In addition to flash plates, objects to be fastened include various objects that can be fastened with screws and nails.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a flash plate with screws and nails temporarily fastened by the method of the present invention, FIG. 2 is an enlarged sectional view taken along the line - - in FIG. An explanatory diagram of how to temporarily fasten nails, Fig. 4 is a partial sectional view of the flash plate being tightened with temporarily fastened screws and nails, and Fig. 5 is an illustration of another method shown corresponding to Fig. 3. It is a modified example figure. 1...Flash plate, 2...Screw, 4...
...Hole for holding screws and nails, 5...Back plate, 6...Ultraviolet or electron beam curing resin, 7...Irradiation lamp.

Claims (1)

[Claims] 1. In the holding hole for screws and nails provided in the object to be fastened,
While filling an ultraviolet or electron beam curable resin, screws and nails are embedded in the resin so that their heads protrude and the entire circumference of their shafts is surrounded by the resin, and then the resin is poured into the resin. It is characterized by being cured by ultraviolet rays or electron beam irradiation.
A method for temporarily fastening screws and nails to objects to be fastened.