JPH05106619A - Fixture member and fixing method therefor - Google Patents

Abstract

PURPOSE:To prevent with high durability the fall-off of a fixture member being fixed to, for example, a concrete wall, by mounting an expanding member to one end of a cylindrical fixture member, the one end thereof being formed with slits to make the member expandible in diameter, and driving a mounting end portion of the expanding member into a fixing hole of the wall surface and expanding the member. CONSTITUTION:A plurality of axial slits 32a are formed in one end of a cylindrical body 32 to form expandible pieces 32b. On the other hand, an expanding member 34 is formed by a base portion 34b and a regulation portion 34a so as to be fitted into the one end of the cylindrical body 32. The outer diameter of the base portion 34b is made same as the inner diameter of the body 32, and the outer diameter of the regulation portion 34a is made larger than the inner diameter, the two portions being connected together by a taper portion 34c. The expanding member 34 is fitted into the expandible-piece 32b forming end of the body 32, and the resulting body 32 is inserted into an insertion hole 10a of a concrete wall 10 from the expanding-member 34 side to cause a fore end of the expanding member 34 to abut against the bottom surface of an engaging hole 10b. Subsequently, an end portion of the body 32 projecting from the wall 10 is hammered to expand the expandible pieces 32b by the taper portion 34c of the expanding member 34 to thereby fix the fixture member to the interior of the engaging hole 10b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture which can be extremely firmly fixed to, for example, a concrete wall surface and a fixing method therefor.

[0002]

2. Description of the Related Art For example, it is common practice to fix a fitting such as a mirror or a shower to a wall surface of a bathroom made of concrete or to fix a drainage pipe or a water supply pipe to a wall surface of a building through the fitting. ing. As a method of attaching these mounting brackets to a concrete wall surface, for example, a hole is bored in the wall surface, the mounting bracket is directly embedded in this hole, or a bolt is embedded in the hole, and the mounting bracket is screwed to the bolt. ..

[0003]

When the mounting metal fitting is fixed via a bolt, the bolt itself is loosened due to external factors such as vibration and impact on the metal fitting as the years go by. As a result, the fixing strength of the bolt to the wall surface is reduced, and the weight of the body to be mounted or the like is added to the bolt, so that the bolt, the mounting bracket, or the like falls off the wall surface.

Therefore, as a solution to the above-mentioned drawbacks,
For example, there is a device "nail" disclosed in Japanese Utility Model Laid-Open No. 61-55505. This nail includes an inner shaft having a conical tip, and an outer shaft fitted to the inner shaft and having a split groove formed at one axial end thereof. Then, by driving the inner shaft and the outer shaft into the wall, the outer shaft is expanded radially outward to firmly fix both shafts to the wall.

However, since the inner shaft is a straight cylinder, there is a drawback that the inner shaft comes off from the outer shaft when an external factor such as vibration or shock is applied to the inner shaft. Further, since the outer shaft only expands with a gentle inclination, there is still a problem that the fixing force becomes weak with time.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the prior art, and can be removed by external factors such as vibration and shock. It is an object of the present invention to provide a novel fixing tool and fixing method that can significantly extend the durable life.

[0007]

In order to overcome the above problems and achieve the intended purpose, a fixture according to the present invention is formed in a cylindrical shape and extends from one end thereof to a predetermined length in the axial direction. A body in which a plurality of extending slits are formed at predetermined intervals in the circumferential direction, a base portion set to an outer diameter dimension substantially the same as the inner diameter dimension of the body, and a regulation set to an outer diameter dimension larger than the inner diameter dimension of the body And a base portion and a restriction portion which are connected by a tapered portion.

Further, a fixing method of a fixing device according to another invention of the present application is a method of fixing the fixing device to a wall or the like, which has an inner diameter substantially the same as the outer diameter of the cylindrical fixing member main body. A hole is bored in the wall, an engaging hole having a diameter larger than that of the insertion hole is formed at the depth end, and the outer diameter of the base and the outer diameter of the fixture are set to be substantially the same as the inner diameter of the fixture body. An expansion body, which is connected to a restriction portion set to a diameter dimension by a taper portion, is fitted and inserted into the fixture body from the base side thereof, and the fixture body with the expansion body mounted is projected from the shaft end of the body. By inserting the restriction portion side into the insertion hole, the restriction portion faces the engagement hole with its tip abutting the bottom portion, and then the end portion protruding from the wall surface of the fixture main body is directed toward the wall surface. The end of the main body where the slit is formed into the taper of the expansion body. Characterized in that so as to expanded radially engaging hole I.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a fixing device and a fixing method of the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

(Regarding Fixture) FIG. 1 shows a fixture according to the present invention. The fixture 30 is a hollow main body 32 set to a required length and is attached to one end of the main body 32. And the expanding body 34. A plurality of slits 32a extending in the axial direction over the required length are formed at one end in the axial direction of the fixture body 32 at predetermined intervals in the circumferential direction. Then, the expansion piece 3 is provided between the slits 32a, 32a.
2b is formed, and the expansion piece 32b functions to fix the fixture 30 to the wall surface (see FIG. 5). Further, on the outer periphery of the end of the fixture main body 32 opposite to the end where the expanding piece 32b is formed, for example, a mounted object such as a mirror or a shower fitting is attached.
A male screw portion 32c to which a nut 36 for fixing (not shown) is screwed is formed.

The expansion member 34 has a base portion 34b having an outer diameter substantially equal to the inner diameter of the fixture body 32, and a restricting portion 34a having an outer diameter larger than the inner diameter of the fixture body 32. The restriction portion 34a and the base portion 34b are connected by a tapered portion 34c. The base 34b of the expansion body 34 is connected to the expansion piece 3 of the fixture body 32.
2b is inserted into an insertion hole 10a, which will be described later, in a state of being inserted into an end portion where 2b is formed. The outer diameter of the restricting portion 34a is set to be the same as or slightly smaller than the outer diameter of the fixture main body 32 so that the restricting portion 34a can be easily inserted into the insertion hole 10a.

(Regarding Device for Forming Insertion Hole and Engagement Hole in Wall) Here, in order to fix the fixing member 30 to the wall 10, first, the insertion hole 10a and the engagement hole 10b are formed in the wall 10. The drilling device 20 shown in FIG. 2 is preferably used for this drilling. In the punching device 20, a cone-shaped first cutting blade 22 is detachably disposed at the tip of a main body 21 formed in a cylindrical shape, and a radius of the main body 21 is provided inside the main body 21. Multiple that can appear outwards
The second cutting blades 26 (two in the embodiment) are provided. The device 20 is configured to be rotationally driven by a rotary electric motor (not shown).

A recess 22a is formed on the rear surface of the first cutting blade 22.
Is formed, and the cutting blade 22 has a concave portion 22a formed in the main body 2
The cutting blade 22 is attached by being fitted into a recess 21b formed at the shaft end of the cutting blade 1, and the cutting blade 22 is configured to rotate integrally with the main body 21. The diameter of the cutting blade 22 is set to be the same as the outer diameter of the main body 32 of the fixture 30. That is, when the diameter of the main body 32 changes due to the change in the specifications of the fixture 30, the cutting blade 22 can be replaced correspondingly.

The first in the main body 21 of the punching device 20
Two grooves 28, 28 having a phase angle of 180 ° are formed behind the position where the cutting blade 22 is disposed, and the groove 28 is set to communicate with the central through hole 21 a of the main body 21. Further, inside each groove 28, a second cutting blade 26 is rotatably and pivotally supported in a state where the blade portion is directed outward in the radial direction, and the second cutting blade 26 is rotatably supported on the outer periphery of the pivotally supporting portion of the second cutting blade 26. The engaging teeth 26a are formed over a predetermined range. Further, a sliding shaft 24 is disposed in the center through hole 21a of the main body 21 so as to be movable in the axial direction, and at the tip of the sliding shaft 24, a second shaft is formed as shown in FIG.
Racks 24a, 24a that mesh with the engaging teeth 26a, 26a of the cutting blades 26, 26 are formed. Therefore, by moving the sliding shaft 24 forward and backward, the pair of cutting blades 26, 26 are projected and retracted outward from the grooves 28, 28 as shown in FIG. In addition, the second cutting blades 26, 26 are provided with grooves 28, 2
When it is immersed in the cutting edge 8, the cutting edge portion is set to be located inside the outer peripheral edge portion of the first cutting blade 22.

[0015]

Next, the case of fixing the fixing device having the above-described structure to a wall will be described in relation to the fixing method of the present application.

First, the first cutting blade 22 having the same diameter as the diameter of the main body 32 of the fixture 30 fixed to the wall 10 is attached to the tip of the drilling device 20, and is attached to the tip of the body 21. As shown in FIG. 3A, the second cutting blade 2
6 and 26 are immersed in the grooves 28 and 28. In this state, the main body 21 is rotated at a high speed by a rotary electric motor (not shown), and the first cutting blade 22 is pressed against the wall surface. By the rotation of the first cutting blade 22, an insertion hole 10a having the diameter dimension of the cutting blade 22 is formed in the wall 10 (see FIG. 3B). At this time, the second cutting blades 26, 26 are
Since it is located inside the outer peripheral edge of the cutting blade 22 of
The inner diameter of the insertion hole 10a is kept constant.

Next, with the main body 21 of the drilling device 20 kept rotating, the movement in the axial direction is stopped,
The sliding shaft 24 is axially moved forward by an appropriate means. As a result, the second cutting blades 26, 2 are engaged via the engaging teeth 26a, 26a that mesh with the rack 24a of the sliding shaft 24.
6 rotates, and as shown in FIG. 3C, gradually protrudes outward from the grooves 28, 28 in the radial direction. As a result, the insertion hole 1
The end in the depth direction of 0a is further cut in the radial direction.
Then, as shown in FIG. 3D, the second cutting blades 26, 26
Is rotated to a state orthogonal to the axis of the main body 21, whereby a substantially semicircular engagement hole 10b is formed at the tip of the insertion hole 10a.
Are drilled (see FIG. 4). Insertion hole 10a and engagement hole 1
After drilling 0b, the sliding shaft 24 is moved backward in the axial direction, the second cutting blades 26, 26 are inserted into the grooves 28, 28, and the main body 21 is pulled out from the insertion hole 10a.

With the base portion 34b of the expanding member 34 fitted and inserted in the end portion of the fixing member 30 on which the expanding member 32b is formed, the fixing member main body 32 is inserted from the mounting portion side of the expanding member 34. Insert into the hole 10a. As shown in FIG. 5A, when the tip of the restricting portion 34a of the expanding body 34 comes into contact with the bottom of the engaging hole 10b, the movement of the expanding body 34 is restricted and the fixing body 32 is expanded. The tip of the opening piece 32b is the expanding body 3
The taper portion 34c of No. 4 contacts. Next, the end portion protruding from the wall surface of the fixture main body 32 is driven toward the wall surface by an appropriate means, so that the expanding piece 32b extends along the tapered portion 34c as shown in FIG. 5 (b). Expand in the radial direction. Since the plurality of expansion pieces 32b radially expand in the engagement hole 10b having a diameter larger than that of the insertion hole 10a, the outer peripheral surface of the expansion piece 32b has an engagement hole 10 in the insertion hole 10a.
The fixing tool body 32 is firmly fixed in the insertion hole by biting into the end portion directed to b.

The fixture body 3 fixed to the wall 10 in this way
The object to be attached is firmly fixed by inserting the object to be attached such as a mirror or a fixture for a shower into the end protruding from the wall surface of 2 and tightening it with the nut 36. In addition, if the nut is integrally formed on the fixture main body 32, the attached body can be fixed only by driving the main body 32 into the wall 10.

[0020]

As described above, according to the fixing device and the fixing method of the present invention, the engaging hole having a larger diameter than the insertion hole is formed at the end of the insertion hole formed in the wall in the depth direction. It is possible to prevent the fixing tool from coming off easily by providing the expanding piece of the fixing tool in the engaging hole. Further, since the expansion piece bites into the end portion of the insertion hole directed to the engagement hole, even if vibration or impact is applied to the fixture body, it does not loosen, and there is an advantage that the durability can be extremely improved. ..

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a fixture according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a drilling device for drilling an insertion hole and an engagement hole in a wall.

FIG. 3 is an explanatory view showing a process of drilling an insertion hole and an engagement hole in a wall by a drilling device.

FIG. 4 is a cross-sectional view of a wall having an insertion hole and an engagement hole formed therein.

FIG. 5 is an explanatory view showing a process of fixing a fixture to a wall.

[Explanation of symbols]

 10 Wall 10a Insertion hole 10b Engagement hole 30 Fixture 32 Fixture body 32a Slit 34 Expanding body 34a Restricting portion 34b Base portion 34c Tapered portion

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[Procedure amendment]

[Submission date] October 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a fixture according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a drilling device for drilling an insertion hole and an engagement hole in a wall.

FIG. 3 is an explanatory view showing a state before the insertion hole and the engagement hole are drilled in the wall by the drilling device.

FIG. 4 shows a state in which an insertion hole is drilled in the wall by the drilling device.
FIG.

FIG. 5 shows a state in which an engagement hole is drilled in a wall by a drilling device.
FIG.

FIG. 6 shows a state in which the drilling of the engagement hole by the drilling device is completed.
FIG.

FIG. 7 is a cross-sectional view of a wall having an insertion hole and an engagement hole formed therein.

8 fixture there is shown a process of fixing to the wall
Insert the fixture body into the insertion hole from the mounting side of the expansion body.
It is an explanatory view showing a closed state .

FIG. 9 shows a process of fixing the fixture to the wall.
The expansion piece of the fixture body along the taper of the expansion body.
It is explanatory drawing which shows the state expanded in a radial direction.

[Explanation of Codes] 10 Wall 10a Insertion Hole 10b Engagement Hole 30 Fixture 32 Fixture Main Body 32a Slit 34 Spreading Body 34a Restricting Part 34b Base 34c Tapered Part

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

Claims (2)

[Claims] 1. A body (32) which is formed in a cylindrical shape and has a plurality of slits (32a) extending from one end thereof in the axial direction over a predetermined length at a predetermined interval in the circumferential direction; The base (34b) is provided with a base portion (34b) set to an outer diameter dimension substantially the same as the inner diameter dimension of (32) and a restriction portion (34a) set to an outer diameter dimension larger than the inner diameter dimension of the main body (32). ) And the restricting portion (34a) are connected by a taper portion (34c) to an expanding body (34). 2. A method of fixing a fixture (30) to a wall (10) or the like, which comprises forming an insertion hole (10a) having an inner diameter substantially the same as the outer diameter of the fixture body (32) formed in a cylindrical shape. While forming a hole in the wall (10), an engaging hole (10b) having a larger diameter than the insertion hole (10a) is formed at the depth end, and the outer diameter is approximately the same as the inner diameter of the fixture body (32). Dimensioned base (34b) and large outer diameter restriction (34b)
The expansion body (34), which is connected to a) by a tapered portion (34c), is inserted into the fixture body (32) from the base side thereof, and the fixture body (32) to which the expansion body (34) is attached is attached. The main body (3
From the side of the restriction portion (34a) protruding from the shaft end of (2), the insertion hole (10
By inserting the restriction part (34a) into the engaging hole (10b) with its tip abutting the bottom part, the end protruding from the wall surface of the fixture body (32) is inserted. By pushing the part toward the wall surface, the slit (3
2a) is formed, the end of the expanding body (34) along the taper portion (34c) of the engaging hole (10b) to radially expand in the fixing method of the fixture ..