JPWO2005119069A1 - Fixed fixture - Google Patents

Abstract

An object of the present invention is to provide a fixing fixture that is easy to use and can be easily fastened, can strongly fasten a brittle fastened product without damaging it, and can obtain high airtightness. In order to achieve this object, slits 21 opened along the longitudinal direction are formed at predetermined intervals in the circumferential direction, and screw insertion holes 24 are formed at the rear end portion with a bottom, and the inside of the rear end portion is formed. As a rear end sandwiching surface 23, and a mounting frame 2 formed by forming a flange portion 25 in the outer radial direction of the rear end portion, and a fitting fitted inside the front end of the mounting frame 2 so as to be movable in the longitudinal direction. The locking head 31 is provided with elastic blades 32 radially extending on the rear end side of the locking head 31 and projecting rearward from the respective slits of the mounting frame 2. The locking member 3 having a screw threaded hole 33 formed on the line is interposed between the locking member 3 and the rear end sandwiching surface 23 of the mounting frame 2 inside the mounting frame 2, and a screw is provided on the axis. The reinforcing elastic member 4 is formed by forming the insertion hole 42.

Description

  The present invention relates to a fixing fixture used when fixing a member to a wall or the like that cannot reach the inside or the back surface, and particularly suitable for a wall that is fragile and easily collapsed when strongly tightened such as gypsum board. It concerns a fixture.

  2. Description of the Related Art Conventionally, there has been proposed a fixed fixture for fastening another member to a place or member such as the inside of a wall that cannot be accessed. For example, Japanese Patent Publication No. 48-24975 discloses an attachment tightening tool having a screw hole in the axial direction and a plurality of elastic claws expanded in the radial direction (Patent Document 1). ). When attaching an object to be fastened to the object to be fastened with the fastening device for fastening, the fastening device for fastening is screwed onto the tip of the mounting screw penetrating the object to be fastened and the fastening screw is pushed to move the fastening object The tightening tool for mounting is inserted into the mounting hole drilled in while opposing the elastic force of the elastic claw. Then, after the elastic claws are expanded inside the fastener, the attachment tightening tool is pulled by rotating while pulling the attachment screw toward the front, and the object to be fastened is fastened to the head of the attachment screw. It is like this.

Japanese Patent Publication No. 48-24975

However, the invention described in JP-B-48-24975 has the following problems.
(1) When inserting the mounting tightening tool into the mounting hole, the mounting screw is screwed and pushed in by this. Must be inserted. Therefore, it is not easy to use, and it is difficult to fasten particularly when the object to be fastened is heavy.
(2) Since the mounting hole has a diameter that allows the mounting tightening tool to pass through, a gap is formed between the mounting hole and the mounting screw, and airtightness and waterproofness are low.
(3) If the mounting screws are simply tightened, the mounting tightening tool is not fixed, so that they will rotate together with the rotation of the mounting screws. For this reason, in the tightening work, the mounting screw must be turned while being pulled toward the front side, that is, the elastic claw must be brought into contact with the inner surface of the fastening object to be hooked and tightened, and the work efficiency is extremely poor.
(4) A fastener made of a brittle material such as a gypsum board will be collapsed by the elastic claw if the mounting screw is tightened too much.

  The present invention has been made to solve such problems, and is easy to use and can be easily fastened, and even a brittle fastener can be strongly fastened without damage, and has high airtightness. It is an object of the present invention to provide a fixed fixture capable of achieving the desired properties.

  The feature of the fixing fixture according to the present invention is that a plurality of slits opened along the longitudinal direction are formed on a cylindrical side surface at a predetermined interval in the circumferential direction, and a bottom end rear end portion is formed. A mounting frame having a screw insertion hole formed therein, the inside of the rear end portion serving as a rear end sandwiching surface, and a flange portion formed radially outward of the rear end portion, and the inside of the tip of the mounting frame. A plurality of locking heads that are movably fitted in the longitudinal direction, and that extend radially from the rear end side of the locking heads and that project rearward from each slit of the mounting frame. A locking member having elastic blades and having a screw threaded hole formed on the axis of the locking head; and a rear end sandwiching surface inside the mounting frame and the locking frame. It has a reinforcing elastic member which is interposed between the member and a screw insertion hole formed on the axis.

  Further, in the present invention, it is preferable that a streak-shaped ridge portion that is fitted into each slit of the mounting frame is formed on an outer peripheral surface of the reinforcing elastic member.

  Further, in the present invention, the screw threaded hole of the locking member may be formed of a female screw forming trough and a female screw forming bulge without forming a female screw in advance.

  Further, a feature of the fixing fixture according to the present invention is that a locking head having a screw threaded hole formed on an axis and a locking member having a plurality of elastic blades radially expanded from the locking head. And a fixing elastic member that is fixed to the elastic blade of the locking member, has a screw insertion hole formed on the axis, and has an elastic flange portion in the outer radial direction of the rear end portion. .. Further, in the present invention, the screw threaded hole of the locking member may be formed of a female screw molding valley portion and a female screw molding bulging portion without previously forming the female screw.

  According to the present invention, it is easy to use and can be fastened easily, and even a fragile fastener such as a gypsum board can be strongly fastened without being damaged, and further, the airtightness is improved and the waterproofness and the soundproofing are excellent. Can be realized.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing a fixing fixture 1a according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line 2A-2A in FIG. As shown in FIGS. 1 and 2, the fixed fixture 1a according to the first embodiment has a mounting frame 2 formed in a substantially cylindrical shape, a locking member 3 fitted in the mounting frame 2, and The reinforcing elastic member 4 is fitted into the mounting frame 2 on the rear side of the locking member 3. The fastening screw X is fastened to the fixed fixture 1a to fasten the fastening object X and the fastening object Y.

  The fixed fixture 1a of the first embodiment will be described in more detail. 3 is a front view of the mounting frame 2, FIG. 4 is a side view seen from the left side (front end side) of FIG. 3, FIG. 5 is a side view seen from the right side (rear end side) of FIG. 3, and FIG. 6 is a sectional view taken along line 6A-6A of FIG. As shown in FIGS. 3 and 6, a plurality of slits 21, four slits 21 in the present embodiment, are formed in the mounting frame 2 at equal intervals along the longitudinal direction thereof. Further, as shown in FIGS. 4 and 6, an opening 22 into which the locking member 3 and the reinforcing elastic member 4 can be fitted is formed on the front end side in the longitudinal direction of the mounting frame 2. On the other hand, on the rear end side in the longitudinal direction of the mounting frame 2, a rear end sandwiching surface 23 is formed on the inner surface of the bottomed rear end. As shown in FIGS. 4 and 5, the rear end holding surface 23 is provided with a screw insertion hole 24 through which the mounting screw 5 can be inserted.

  Further, a flange portion 25 protruding in the radial direction is formed at the rear end portion in the longitudinal direction of the mounting frame 2. The diameter of the flange portion 25 is formed to be larger than the diameter of the prepared hole h1 of the fastener X described later. Further, on the outer side surface near the rear end portion, four projecting pieces 26 are formed at equal intervals in the circumferential direction along the longitudinal direction. When the mounting frame 2 is fitted into the prepared hole h1, the protruding piece 26 prevents the mounting frame 2 from rotating by being caught in the prepared hole h1.

  Next, the locking member 3 is formed of an elastically deformable member such as plastic. The locking head 31 which is the main body of the locking member 3 is formed in a cylindrical shape, and a plurality of elastic blades 32 are radially provided on the rear end side of the locking head 31, as shown in FIGS. 7 to 10. Has been expanded to. In the first embodiment, four elastic blades 32 are extended. As shown in FIGS. 1 and 2, the elastic blade 32 is protruded rearward from the respective slits 21 of the mounting frame 2 when fitted into the mounting frame 2. When it is fitted into the mounting frame 2, the elastic blade 32 is recessed in the inner diameter direction using a predetermined jig and is inserted from the opening 22 of the mounting frame 2. Further, as shown in FIGS. 8 and 10, the locking head 31 is formed with a screw screw hole 33 on the axis, and the screw screw hole 33 has a female screw screwed with the mounting screw 5. 33a is formed. The locking member 3 is moved rearward along the longitudinal direction of the mounting frame 2 by screwing the mounting screw 5 onto the female screw 33a and rotating the same.

  In the first embodiment, the female screw 33a is formed in advance in the screw engagement hole 33. However, as shown in FIGS. 11 and 12, the female screw 33a may be formed by the mounting screw 5 being screwed into the female screw 33a without being formed in advance and screwed as it is. For example, in FIG. 11 and FIG. 12, the screw threaded hole 33 is composed of a female screw forming trough 33b and a female screw forming bulge 33c. As a result, at the same time when the mounting screw 5 is screwed in, the female screw forming bulge 33c is scraped and screwed with the mounting screw 5. According to such a locking member 3, there is an advantage that it is not necessary to limit the screw diameter in advance and it is possible to deal with the mounting screws 5 of various sizes. The number of female screw forming troughs 33b and female screw forming bulges 33c is not limited to three or four, and may be increased or decreased as appropriate.

  Further, as shown in FIG. 13, when the locking head 31 of the locking member 3 is fitted into the mounting frame 2 and is moved rearward by tightening the mounting screw 5, the locking head 31 is moved along the longitudinal frame portion. A moving groove 34 may be formed to facilitate movement. The moving groove 34 is formed corresponding to the frame portion of the mounting frame 2 in the longitudinal direction, that is, formed between the elastic blades 32.

  The reinforcing elastic member 4 is made of an elastic material such as a polymer material having a high elasticity such as rubber, and has a substantially cylindrical shape. The reinforcing elastic member 4 is inserted into the mounting frame 2 through the opening 22 and is brought into contact with the rear end sandwiching surface 23 of the mounting frame 2. Further, as shown in FIGS. 14 and 15, the outer peripheral surface of the reinforcing elastic member 4 is streaked at a position corresponding to the longitudinal frame portion and each slit 21 when the elastic member 4 is fitted into the mounting frame 2. Uneven surface is formed. The ridge portion 41 is fitted in each slit 21.

  Further, as shown in FIGS. 2 and 15, a screw insertion hole 42 for inserting the mounting screw 5 is formed on the axis of the reinforcing elastic member 4. Therefore, in the fixed fixture 1a according to the first embodiment, in which the reinforcing elastic member 4 is fitted to the rear end side of the mounting frame 2 and then the locking member 3 is fitted to the front end side thereof. The two screw insertion holes 24, the screw insertion hole 42 of the reinforcing elastic member 4, and the screw engagement hole 33 of the locking member 3 are formed in a substantially straight line.

  Next, the operation of the fixing fixture 1a in the first embodiment having such a configuration will be described with reference to FIGS. 16 to 19.

  When the object to be fastened Y is fastened to the fastened object X that cannot be reached inside by the main fixing fixture 1a, first, the fastened hole h1 is bored in the fastened object X. The diameter of the prepared hole h1 may be formed to be the same as or slightly larger than the outer diameter of the mounting frame 2. On the other hand, the object to be fastened Y is formed with a screw hole h2 into which the mounting screw 5 is inserted and a taper portion t to be engaged with the head of the mounting screw 5.

  Then, when the fixed fixture 1a is inserted into the prepared hole h1 as shown in FIG. 16, the elastic blade 32 of the locking member 3 is housed in the slit 21 of the attachment frame 2 in accordance with this inserting operation. At this time, although frictional resistance may be generated between the elastic blade 32 and the prepared hole h1 and it may be caught, the reinforcing elastic member 4 is interposed between the elastic blade 32 and the rear end sandwiching surface 23. Therefore, the locking member 3 moves forward in accordance with the operation of pushing the mounting frame 2 and passes through the prepared hole h1 without stopping. Then, when the elastic blade 32 completely passes through the prepared hole h1, as shown in FIG. 17, the elastic blade 32 is restored by its elastic force and radially expands from each slit 21. When the fixed fixture 1a is inserted into the prepared hole h1, the insertion end position is determined by the flange portion 25 of the attachment frame 2 coming into contact with the fastener X, and the fixed fixture 1a is dropped inside the prepared hole h1. It does not end up.

  Next, the mounting screw 5 is inserted with the screw hole h2 of the object to be fastened Y aligned with the prepared hole h1 of the fastener X. The inserted mounting screw 5 passes through the screw insertion hole 24 of the mounting frame 2 and the screw insertion hole 42 of the reinforcing elastic member 4, and then reaches the screw engagement hole 33 of the locking member 3. When the mounting screw 5 is rotated in this state, the mounting screw 5 is screwed into the female screw 33a of the locking member 3 and the locking member 3 is pulled toward the front side (FIG. 18). At this time, the mounting frame 2 receives a rotational force in the circumferential direction via the locking member 3 due to the rotational torque of the mounting screw 5, but the projection piece 26 bites into the inner wall surface of the prepared hole h1 to prevent rotation, and Prevent rotation. When the tightening is further increased and the rotational force in the circumferential direction is increased, the reinforcing elastic member 4 is pressed by the elastic blades 32 and elastically deformed as described later, and bulges outward and the prepared hole h1 and Since it abuts on the peripheral portion, co-rotation can be prevented.

  When the mounting screw 5 is further tightened, as shown in FIG. 19, the elastic blade 32 comes into contact with the inner wall of the fastener X, and is expanded further. As the elastic blade 32 moves rearward, the reinforcing elastic member 4 also slides the protrusion 41 along the slit 21 and moves rearward. As a result, the reinforcing elastic member 4 contracts in the longitudinal direction and expands in the radial direction. Then, the head of the mounting screw 5 is locked to the taper portion t of the object to be fastened Y. As described above, the fastening object X and the fastening object Y are sandwiched and fastened to the head of the mounting screw 5 and the elastic blade 32 of the reinforcing elastic member 4 and the locking member 3.

According to the first embodiment as described above, the following effects can be obtained.
1) As shown in FIG. 20, the reinforcing elastic member 4 elastically deforms and is interposed between the elastic blade 32 and the fastening object X, and abuts on the peripheral edge portion of the prepared hole h1 to reach the tip of the elastic blade 32. Since the force is dispersed and buffered, it is possible to prevent the fastener X from being damaged by the elastic blade 32. As a result, it is possible to firmly fasten a brittle wall material such as gypsum board.
2) By using the mounting frame 2 and the reinforcing elastic member 4, the tensile strength and the shear strength are improved.
3) As shown in FIG. 20, since the reinforcing elastic member 4 elastically deforms and protrudes from the slit 21, the gap with the mounting screw 5 and the gap with the prepared hole h1 are filled, resulting in improved airtightness and waterproofness. It is possible to realize fastening with excellent soundproofing.

  Next, a second embodiment of the present invention will be described with reference to FIGS. 21 to 24. It should be noted that, in the configuration of the second embodiment, configurations that are the same as or equivalent to the configurations of the first embodiment described above are assigned the same reference numerals and repetitive description is omitted.

  The feature of the fixing fixture 1b in the second embodiment is that the fixing elastic member 6 is used instead of the reinforcing elastic member 4 in order to reduce the number of parts. This fixing elastic member 6 has substantially the same structure as the reinforcing elastic member 4, but as shown in FIGS. 21 and 24, the protrusion 41 is not formed on the outer peripheral surface of the cylindrical main body. A flange portion 61 is formed at the rear end portion. The front end portion of the fixing elastic member 6 is fixed to the rear end of the locking head 31 and around the root of the elastic blade 32 with an adhesive or the like.

  Then, when the object to be fastened Y is fastened to the object to be fastened X using the fixing fixture 1b of the second embodiment, the elastic blade 32 is inserted into the prepared hole h1 while being biased radially inward, and fixed. The elastic member 6 is pushed in. At this time, the outer diameter of the fixing elastic member 6 may be arbitrarily set as long as it is inserted into the prepared hole h1. Easy to close and prevent co-rotation. Further, since the flange portion 61 abuts on the fastener X, it does not accidentally fall off.

  When the locking member 3 passes through the prepared hole h1, the elastic blade 32 expands. After that, the locking member 3 is pulled toward the front side by screwing the mounting screw 5. Then, similarly to the first embodiment, the object to be fastened Y is fixed to the object to be fastened X by being held by the head of the mounting screw 5, the elastic blade 32 and the elastic member 6 for fixing.

  According to the second embodiment as described above, in addition to the effects of the first embodiment described above, the fixed fixture 1B according to the present invention can be configured with a smaller number of parts. Further, since it is possible to contact the prepared hole h1 and the peripheral portion thereof without passing through the slit 21 of the mounting frame 2, the adhesiveness is further enhanced.

  Next, a more specific example of the fixed fixture 1a in the above-described first embodiment will be described. In the following examples, the to-be-fastened object Y was fixed to the fastened object X by the fixing fixture 1a of the first embodiment, and the tensile strength test was performed. In this tensile strength test, five test pieces were prepared and their average value was calculated. In the following examples, the fastener X uses a gypsum board, and a prepared hole h1 having a diameter of 11.0 mm is drilled in this gypsum board. In addition, a 5.0 mm diameter mounting screw 5 was used for fastening. Further, as a comparative example to each example, a fixed fixture without the reinforcing elastic member 4 was prepared, and the tensile strength was measured in the same manner.

  In Example 1, a gypsum board with a thickness of 9.5 mm was used. As a result, as shown in FIG. 25, the fixed fixture of Comparative Example 1 had an average tensile strength of about 0.33 kN, whereas the fixed fixture 1a of the present example had an average tensile strength of about 0.5 kN. It is recognized that the tensile strength of Example 1 is improved by 1.5 times or more as compared with Comparative Example 1.

  In Example 2, a gypsum board having a thickness of 12.5 mm was used. As a result, as shown in FIG. 26, the fixing fixture of Comparative Example 2 had an average tensile strength of about 0.46 kN, whereas the fixing fixture 1a of Example 2 had an average tensile strength of about 0.6 kN. The strength was shown, and it was confirmed that the tensile strength of Example 2 was improved by about 1.3 times or more as compared with Comparative Example 2.

  According to each of the above examples, the use of the reinforcing elastic member 4 as in the first embodiment shows that the tensile strength is improved by at least 30 to 50%. Although gypsum board is used as the fastener X in each of the above examples, it goes without saying that a higher tensile strength value can be obtained by using the fastener X having higher strength.

  The fixed fixtures 1a and 1b according to the present invention are not limited to the embodiments described above, and can be modified as appropriate. For example, in each of the above-described embodiments, four slits 21 of the mounting frame 2 are formed and four elastic blades 32 are formed, but the number of slits 21 is not limited to this, and may be increased or decreased as appropriate.

The front view which shows 1st Embodiment of the fixing fixture which concerns on this invention. It is sectional drawing in the 2A-2A line of FIG. It is a front view of the attachment frame of the 1st Embodiment of this invention. It is the side view seen from the left side (front end side) of FIG. It is the side view seen from the right side (rear end side) of FIG. It is sectional drawing in the 6A-6A line of FIG. It is a front view of the locking member of this 1st Embodiment. It is the side view seen from the left side (front end side) of FIG. It is the side view seen from the right side (rear end side) of FIG. It is sectional drawing in the 10A-10A line of FIG. It is a side view which shows other embodiment of the locking member of this 1st Embodiment. It is a side view which shows other embodiment of the locking member of this 1st Embodiment. It is a front view which shows other embodiment of the locking head of this 1st Embodiment. It is a front view of the elastic member for reinforcement of this 1st embodiment. It is a side view of FIG. It is a figure explaining the fastening operation by the fixed attachment of this 1st Embodiment. It is a figure explaining the fastening operation by the fixed attachment of this 1st Embodiment. It is a figure explaining the fastening operation by the fixed attachment of this 1st Embodiment. It is a figure explaining the fastening operation by the fixed attachment of this 1st Embodiment. It is sectional drawing in the state fastened by the fixed attachment of this 1st Embodiment. It is a front view of the fixed attachment of this 2nd Embodiment. It is the side view seen from the left side (front end side) of FIG. It is the side view seen from the right side (rear end side) of FIG. FIG. 24A is a cross-sectional view taken along the line 24A-24A in FIG. 22. 4 is a table showing the results of tensile strength test in Example 1. 7 is a table showing the results of tensile strength test in Example 2;

Explanation of symbols

1a, 1b Fixed mounting tool 2 Mounting frame 3 Locking member 4 Reinforcement elastic member 5 Mounting screw 6 Fixing elastic member 21 Slit 22 Opening part 23 Rear end holding surface 24 Screw insertion hole 25 Flange part 26 Projection piece 31 Locking Head 32 Elastic blade 33 Screw screwing hole 33a Female screw 33b Female screw forming valley 33c Female screw forming bulge 34 Moving groove 41 Projection 42 Screw insertion hole 61 Flange h1 Pre-hole h2 Screw hole t Tapered part X Fastener Y Fastener

Claims (5)

A plurality of slits opened along the longitudinal direction are formed on the cylindrical side surface at predetermined intervals in the circumferential direction, and a screw insertion hole is formed at the rear end of the bottom. An inner side of the rear end portion is a rear end holding surface, and a mounting frame formed by forming a flange portion in the outer radial direction of the rear end portion,
The mounting frame has a locking head that is fitted inside the front end of the mounting frame so as to be movable in the longitudinal direction, and extends radially from the rear end side of the locking head, and is rearward from each slit of the mounting frame. A locking member having a plurality of elastic blades projecting in the direction, and a screw threaded hole is formed on the axis of the locking head,
A reinforcing elastic member which is inside the mounting frame, is interposed between the rear end sandwiching surface of the mounting frame and the locking member, and has a screw insertion hole formed on an axis line. And fixed fixture.   The fixed fixture according to claim 1, wherein a streak-shaped protrusion is formed on the outer peripheral surface of the reinforcing elastic member so as to be fitted into each slit of the attachment frame.   The screw threaded hole of the locking member according to claim 1 or claim 2, wherein the female screw is not formed in advance and is formed of a female screw forming trough and a female screw forming bulge. A fixed fixture characterized in that A locking head having a screw threaded hole formed on the axis, and a locking member having a plurality of elastic blades radially expanded from the locking head,
A fixing fixture fixed to the elastic blade of the locking member, having a screw insertion hole formed on the axis, and an elastic flange member having an elastic flange portion formed in the outer radial direction of the rear end portion. .   5. The screw threaded hole of the locking member according to claim 4, wherein the female screw is not formed in advance and is formed of a female screw forming valley portion and a female screw forming bulge portion. Fixed fixture to do.

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