JPH084242A - Mounting structure of fixing metal fitting to plate architectural material - Google Patents

Abstract

PURPOSE:To facilitate the mounting work when a fixing metal fitting such as bolt is mounted on a plate architectural material reverse surface and facilitate the boring of a mounting hole. CONSTITUTION:A mounting hole 12 of bead-end hole form is formed on the reverse surface of a plate architectural material 10, and a fixing metal fitting 14 having a shaft part 18 and a head part 20 having a diameter larger than the shaft part 18 and equal to or slightly smaller than the bore diameter of the mounting hole 12 is inserted into the mounting hole 12 from the head part 20 side. In the inserted state, a dropping-out preventing member 24 having a coil spring part 26 formed by winding a metal wire rod, which has an outer diameter larger than the mounting hole 12 in the free state and a bore diameter smaller than the diameter of the head part 20 of the fixing metal fitting in the installed state to the mounting hole 12 is inserted into the mounting hole 12 in the diameter contracted state to prevent the dropping-out of the fixing metal fitting 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-like building material such as a tile, and more particularly to a mounting structure suitable for application of a fixing metal fitting to a large plate-like building material having a side of 300 mm or more.

[0002]

2. Description of the Related Art As a method for applying a plate-like building material such as tiles, a wet method in which the back surface of the plate-like building material is adhered to the work surface via mortar, etc. Various construction methods such as construction methods are implemented.

In the former wet method, there is a risk that the plate-shaped building material may fall off when the plate-shaped building material is peeled off from the mortar or the like. Therefore, as shown in FIG. One end of the wire 102 is fixed to the backside of the wire 100 with an organic adhesive 104, and the other end is fixed to the work surface 108 with a fastener such as a screw 106. In case of emergency, the plate-shaped building material 1
I am trying not to drop 00.

However, such an organic adhesive 10
In the case of fixing the wire 102 by No. 4, the adhesive 104 may be deteriorated due to aging, etc., and there is a problem in reliability. Therefore, it is a desirable method to project the fixing member from the back surface of the building material 100 and fasten the wire 102 to the fixing member.

On the other hand, in the latter dry method, as shown in FIG. 4 (B), bolts 112 are provided on the back surface of the plate-shaped building material 110.
It has been conventionally practiced to stand up and fasten the connecting fitting to the back surface of the plate-shaped building material 110 with the bolt 112.

Here, as means for raising the bolts 112 on the plate-shaped building material 110, bolt holes 114 are formed in the back even part of the plate-shaped building material 110 and the bolts 112 are inserted therein, while the plate-shaped building material 110 side. A pin hole 116 is bored from the end face, and the pin 118 is inserted into the pin hole 116.
The bolt 112 is inserted into an insertion hole 120 formed in the bolt 112 to prevent the bolt 112 from coming off.

[0007]

However, as shown in FIG.
In the case of the mounting structure of the bolt 112 shown in (B), it is necessary to perforate the plate-shaped building material 110 for each bolt 112 at two places (bolt hole 114 and pin hole 116), and especially, the side. Drilling the pin hole 116 from the end face is extremely difficult because high positional accuracy is required.
There was a problem that the processing cost was high.

[0008]

The invention of the present application has been made to solve such a problem. Thus, the invention of the present application forms a blind hole-shaped mounting hole on the back surface of a plate-like building material, and has a shaft-shaped portion and a diameter larger than the shaft-shaped portion and equal to or slightly smaller than the inner diameter of the mounting hole. A metal wire rod is wound into a coil in a state in which a fixing bracket having a head is inserted into the mounting hole from the head side, and in a free state, an outer diameter is larger than the mounting hole and to the mounting hole. In the mounted state, a retaining member having a coil spring-shaped portion having an inner diameter smaller than the diameter of the head of the fixing metal fitting is inserted into the mounting hole in a reduced diameter state to prevent the fixing metal fitting from coming off. (Claim 1).

According to another invention of the present application, in the mounting structure according to claim 1, the mounting hole is a straight hole having an inner peripheral surface extending straight and straight with respect to an axis thereof. (Claim 2).

Still another invention of the present application is the mounting structure according to claim 1 or 2, wherein the fixing metal fitting is a bolt having a male screw on the shaft-like portion (claim 3).

According to a still further invention of the present application, in the mounting structure according to claim 3, the back surface of the head of the bolt is tapered so that the diameter becomes gradually smaller as it goes to the tip end side of the shaft-shaped portion. A nut is screwed into the male screw of the nut portion, and the nut is fitted to the shaft portion at a surface of the nut facing the bolt head or at a position closer to the bolt head than the nut. The surface of the fitting member that moves forward by screwing in is a taper shape in which the diameter gradually decreases as it goes to the bolt head side, and by screwing the nut, the coil spring shape of the retaining member is formed. The portion is forcibly expanded in the mounting hole and pressed against the inner peripheral surface of the hole (claim 4).

[0012] Still another invention of the present application is as follows.
Alternatively, in the mounting structure of 4, the one end on the opening side of the mounting hole of the coil spring-shaped portion of the retaining member is a hook portion that projects radially outward (claim 5).

[0013]

As described above, according to the first aspect of the invention, the fixing metal fitting with the head is inserted into the mounting hole of the plate-shaped building material from the head side, and the retaining hole having the coil spring-shaped portion is provided in the mounting hole. The member is inserted in a reduced diameter state to prevent the fixing metal fitting from coming off.

The coil spring-shaped portion of the retaining member inserted into the mounting hole is pressed against the inner peripheral surface of the hole by its own elastic force and is firmly fixed thereto. The locking action of the retaining member prevents the fixing fitting from coming off the mounting hole.

According to the present invention, the fixing metal fitting is inserted into the mounting hole only by inserting the fixing metal fitting into the mounting hole of the plate-shaped building material and then inserting the coil spring portion of the retaining member into the mounting hole in a reduced diameter state. The fixing bracket can be attached to the plate-shaped building material with an extremely simple operation.

Further, the insertion of the coil spring-shaped portion of the retaining member into the mounting hole can be carried out by rotating the retaining member and screwing the coil spring-shaped portion while reducing the diameter of the coil spring-shaped portion. The retaining member can be easily attached.

According to a second aspect of the present invention, the mounting hole is a straight hole. According to the present invention, it is easy to machine a plate-shaped building material, and the inner peripheral surface of the hole has the above-mentioned structure. The coil spring-shaped portion of the retaining member can be sufficiently brought into close contact with a wide area, and a strong fixing force can be generated.

According to a third aspect of the present invention, the fixing metal fitting is a bolt having a male thread on the shaft portion. According to the present invention, the male thread of the bolt can be used to easily connect other metal fittings such as a connecting metal fitting. It can be fastened or connected.

According to a fourth aspect of the present invention, the back surface of the head of the bolt is tapered, and a fitting surface such as a washer fitted to the shaft of the nut or bolt is formed with a tapered surface. According to the invention, as the nut is screwed in, an expanding force is exerted on both ends of the coil spring-shaped portion by the action of the pair of tapered surfaces, whereby the coil spring-shaped portion is forcibly expanded in diameter and the mounting hole It is pressed against the inner peripheral surface. As a result, the bolt, the retaining member, and the nut are fixed firmly and integrally in the mounting hole.

According to a fifth aspect of the present invention, a hooking portion is formed at one end of the coil spring-shaped portion of the retaining member. According to the present invention, a rotational operation force is applied to the coil spring-shaped portion at the hooking portion. Therefore, the coil spring-shaped portion can be inserted into the mounting hole while reducing the diameter with good workability.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 3, reference numeral 10 is a flat plate-shaped building material made of ceramics, and mounting holes 12 are formed in four even parts on the back surface. As shown in FIG. 1, the mounting hole 12 is a hole of a stop form, and the inner peripheral surface thereof is a straight hole extending straight in a direction parallel to the hole axis.

Bolts 14 as fixing fittings are attached to the plate-shaped building material 10 in the respective mounting holes 12. FIG. 1 specifically shows the mounting structure of the bolt 14. As shown in the figure, the bolt 14 has a shaft portion 18 and a head portion 20, and a male screw 22 is formed on the shaft portion 18. The head portion 20 has a diameter larger than that of the shaft-like portion 18 and substantially equal to or slightly smaller than the inner diameter of the mounting hole 12.

Reference numeral 24 denotes a retaining member made of a metal wire rod, which has a coil spring-shaped portion 26 formed by winding the metal wire rod in a coil shape. The coil spring-shaped portion 26 is
The windings are closely wound in a close contact state, and the outer diameter thereof is slightly larger than the inner diameter of the mounting hole 12 in the free state. Further, the inner diameter is smaller than the diameter of the bolt head 20 when mounted in the mounting hole 12.

In the mounting structure of this embodiment, the bolt 14 can be mounted in the mounting hole 12 as follows. That is, first, the bolt 14 is attached to the mounting hole 12 from the head 20 side.
Insert inside. Next, the coil spring-shaped portion 26 of the retaining member 24 is inserted into the mounting hole 12 in a reduced diameter state.

The coil spring-shaped portion 26 inserted into the mounting hole 12 is strongly pressed and fixed to the inner peripheral surface of the mounting hole 12 by its own elastic force, and prevents the bolt 14 from coming off the mounting hole 12. . The work of inserting the coil spring portion 26 of the retaining member 24 into the mounting hole 12 can be performed as follows.

First, a part of the tip end side of the coil spring-shaped portion 26 is inserted into the mounting hole 12, and then the coil spring-shaped portion 26 is rotated (at this time, the coil spring-shaped portion 2).
6 is rotated in the direction in which the diameter of the coil 6 is reduced), and the coil spring-like portion 26 is gradually inserted in the mounting hole 12 while being radially reduced.

At this time, the coil spring-shaped portion 26 is inserted into the mounting hole 12 as if it were screwed. That is, in this example, the retaining member 24 can be inserted into the mounting hole 12 by screwing it in,
It can be mounted in the mounting hole 12 very easily.

At this time, it is convenient to use the jig 25 shown in FIG. Here, the jig 25 is a cylindrical member having a void 27 inside and has a hook portion 28 at the lower end. The jig 25 is externally fitted to the shaft-shaped portion 18 of the bolt 14, the hook portion 28 is hooked on the hook portion 30 of the retaining member 24, and then the jig 25 is rotated. As a result, the coil spring-shaped portion 26 is inserted into the mounting hole 12 while being gradually reduced in diameter from the fitting portion into the mounting hole 12 while being rotated.

As described above, in the mounting structure of this example,
After inserting the bolt 14 into the attachment hole 12 of the plate-shaped building material 10, the bolt 14 can be easily attached to the attachment hole 12 by simply rotating the retaining member 24 and inserting the bolt 14 into the attachment hole 12.

At this time, the retaining member 24 is strongly pressed against the inner peripheral surface of the mounting hole 12 by the elastic force of the coil spring-shaped portion 26, and is firmly fixed. Therefore, the bolt 14 is prevented from coming off the plate-shaped building material 10.

In the case of this example, since the mounting hole 12 is a straight hole, the coil spring-shaped portion 26 of the retaining member 24 can be sufficiently adhered to the inner peripheral surface of the hole over a wide area. It is possible to generate a strong fixing force. Further, it is easy to form a hole in the plate-shaped building material 10, and the processing cost can be kept low.

FIG. 2 shows another embodiment of the present invention. As shown in (a) of the figure, the bolt 32 has a shaft-shaped portion 34 and a head portion 36, and a male screw 38 is formed over the entire shaft-shaped portion 34. The head portion 36 of the bolt 32 is a tapered surface 40 whose diameter gradually decreases as the rear surface advances toward the tip of the shaft-shaped portion 34.

Reference numeral 42 denotes a fitting member fitted to the shaft-shaped portion 34 of the bolt 32, and is more bolt-shaped than the nut 46.
It is fitted to the shaft-like portion 34 at the side position. The surface of the fitting member 42 on the bolt head 36 side is
The tapered surface 44 has a diameter that gradually decreases toward the side.

In this example, the mounting hole 12 is formed as follows.
A bolt 32 can be attached to the. First bolt 3
The head 36 of No. 2 is inserted into the mounting hole 12, the coil spring-shaped portion 26 of the retaining member 24 is inserted into the mounting hole 12 in a reduced diameter state, and then the fitting member 42 is shaped like the shaft of the bolt 32. The nut 46 is screwed in along the male screw 38 of the bolt 32 while being fitted to the portion 34. At this time, the fitting member 42
Moves forward as the nut 46 is screwed in, and finally contacts one end of the coil spring-shaped portion 26 of the retaining member 24. With further advancement, the coil spring of the retaining member 24 cooperates with the tapered surface 40 of the bolt head 36. The flare 26 is forcibly expanded.

As a result, the bolt 32, the retaining member 24, and the nut 46 are integrally fixed to the mounting hole 12.

In the above example, the fitting member 42 is separate from the nut 46, but as shown in FIG.
The lower half of the nut 48 on the bolt head side may be the tapered surface 50. In this case, the number of required parts is small.

Although the embodiments of the present invention have been described in detail above, the present invention can also be carried out by injecting and filling a resin into the mounting hole 12 and then solidifying it after the fixing members such as bolts and the retaining member are inserted. In this case, the fixing metal fitting can be more firmly fixed, and it is also possible to prevent water from entering the inside of the mounting hole 12 after the plate-shaped building material 10 is attached and causing frost damage. Also, the present invention has a side of 300 m.
The effect is great when applied to large building materials of m square or more, but it is also applicable to building materials smaller than that.

Further, in the present invention, the coil spring-like portion may not be closely wound, that is, there may be a gap between the windings.

The mounting structure of the present invention can be applied not only to the dry type but also to the wet type, and the present invention can be configured in a modified form without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a diagram showing a mounting structure of a bolt as a fixing metal fitting which is an embodiment of the present invention.

FIG. 2 is a view showing a bolt mounting structure according to another embodiment of the present invention.

FIG. 3 is a perspective view of the back surface of the plate-shaped building material in which bolts are mounted on the plate-shaped building material according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

 10 Plate-shaped building material 12 Mounting hole 14,32 Bolt 18,34 Shaft-shaped part 20,36 Head 22,38 Male screw 24 Detachment prevention member 26 Coil spring-shaped part 28,30 Hook part 40,44,50 Tapered surface 46,48 Nut

Claims (5)

[Claims] 1. A mounting hole in the form of a stop hole is formed on the back surface of a plate-shaped building material, and a shaft-shaped portion and a head having a diameter larger than that of the shaft-shaped portion and equal to or slightly smaller than the inner diameter of the mounting hole. In the state where the fixing bracket having is inserted into the mounting hole from the head side,
A coil spring-shaped portion formed by winding a metal wire in a coil shape, the outer diameter of which is larger than the mounting hole in the free state and the inner diameter of which is smaller than the head diameter of the fixing bracket when mounted in the mounting hole. An attachment structure for mounting a fixing metal fitting to a plate-like building material, wherein a retaining member having a diameter is inserted into the mounting hole in a reduced diameter state to prevent the fixing metal fitting from coming off. 2. The mounting structure according to claim 1, wherein the mounting hole is a straight hole having an inner peripheral surface extending straight and parallel to an axis of the mounting hole. Mounting structure for fixing metal fittings. 3. The mounting structure according to claim 1 or 2, wherein the fixing metal fitting is a bolt having a male screw on the shaft-shaped portion. 4. The mounting structure according to claim 3, wherein the back surface of the head portion of the bolt is tapered so that the diameter gradually decreases as it goes to the tip side of the shaft-like portion, while the male screw of the shaft-like portion has a nut. Is screwed, and is fitted to the shaft-like portion at a surface of the nut facing the bolt head or at a position closer to the bolt head than the nut, and is fitted forward by screwing the nut. The surface of the mounting member on the bolt head side has a taper shape in which the diameter gradually decreases toward the bolt head side, and the coil spring-shaped portion of the retaining member is screwed into the mounting hole by screwing the nut. A structure for mounting a fixture to a plate-shaped building material, which is forcibly expanded and pressed against the inner peripheral surface of the hole. 5. The mounting structure according to claim 1, 2, 3 or 4, wherein one end of an opening side of the mounting hole of the coil spring-shaped portion of the retaining member is a hook portion that projects radially outward. Mounting structure for fixing metal fittings to plate-like building materials.