JPH1061225A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the work efficiency by forming a fastener into one body beforehand to enable a fastening work, enlarge the thickness range of a plate of a member to be fastened, and improve fastening strength. SOLUTION: A fastener body 1 has a diameter such that the body 1 can be inserted into a mount hole 5a of a member 5 to be fastened has a large diameter portion 1a having at its top end an outwardly extending flange 1d adapted to contact the surface of the member 5 and a taper portion 1c which connects coaxially the portion 1a with a small diameter portion 1b. An elastic lock member 3 having a diameter such that the member 3 can be inserted into the hole 5a and a slider 2 are fitted onto the portion 1b successively from below, and a fastening screw rod 4 passing through a center hole 1e of the body 1 and a bottom wall 1f is screwed into a threaded hole 2d provided at the bottom wall 2a of the slider 2 to form them into a single body. The single body is inserted from outside into the hole 5a and the rod 4 is turned from outside by means of a tool so that the slider 2 is moved through thread to push up the member 3 so as to expand the diameter thereof, whereby the member 3 is pressed against the rear side of the member 5 to be fastened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back side (inside) of a work to be fastened to a mounting hole formed therein.
The present invention relates to a fastener that can be mounted only by an external operation without an operation from the user, and more particularly, to a fastener for fastening a plurality of members to be fastened, and to a fastener to be fixed to only one member to be fastened. The present invention relates to a fastener that can also be used as a fastener.

[0002]

2. Description of the Related Art The present applicant has proposed a movable handrail as shown in FIG. 9 for a handrail to be attached to a bathroom for a physically handicapped person, an elderly person, and other disabled persons. In this case, the upper end of the handrail c is freely movable with respect to a guide rail b mounted horizontally on a wall a or a ceiling (not shown) or the like so that the handrail c can be locked at a predetermined counter position so as to be freely lockable. At each of the lock positions, the slidable lower end d of the handrail c is engaged with the receiving seat e mounted on the bath rim f of the bathtub g so as to be freely disengageable.

However, in the bathtub g, since the lower side surface of the bath rim f is covered with the apron h,
When mounting the receiving seat e to a mounting hole (not shown) formed in the surface of the bath rim f, since operation from the back side (inside) is not possible, it is necessary to rely only on work from the outside (upper side). .

However, as fasteners conventionally used for fastening a plurality of members to be fastened, those shown in FIGS. 10 to 14 are known, and the fastener shown in FIG. And a nut j, which are screwed from both sides to fasten a plurality of members k, l to be fastened.

The fastener shown in FIG. 11 comprises three members, a clip m, a ring n, and a clip pin o, and these members are pushed in from the front side and between the members k and l to be fastened. k and l are concluded.

The fastener shown in FIG. 12 is made of one member and fastens the members k and l to be fastened by a screwing operation from the front side.
The fastened members k and l can be fastened by a screwing operation from the front side.

The fastener shown in FIG. 14 is composed of two members, a plunger p and a grommet q, and fastens the members k and l to be fastened by a pushing operation from the front side.

[0008]

However, FIG.
Takes a long time to screw in and cannot be used in places where operation from the back side is not possible.
It takes time and effort to machine the round hole r and the square hole s in each of the fastened members k and l, and the range of plate thickness that can be supported by the fastened members k and l is small. Cost.

FIG. 12 shows a member k to be fastened,
In the case of FIG. 13, the processing of the elongated hole t is troublesome, and the corresponding plate thickness range of the members to be fastened k, l is also small. Also, a large fastening strength cannot be obtained.

Further, the one shown in FIG. 14 has a defect that the mounting by the pushing operation is quick, but the corresponding plate thickness range of the members k and l to be fastened is small and the fastening strength is small.

The present invention has been made in view of such technical problems,
According to the first aspect, after being inserted from the outside into the circular hole drilled in one member to be fastened, it can be easily fastened by a screwing operation from the outside, and a large fastening strength can be obtained. It is an object of the present invention to fasten a member to be fastened with a considerably large width and to use the fastener itself as a receiving seat for a handrail as described above.

Further, according to a second aspect, the slider and the lock member as the constituent members in the first aspect,
By being integrally formed of a spring material, the number of parts can be reduced, workability in handling the parts can be improved, and cost can be reduced.

[0013]

In order to achieve the above object, according to the present invention, in the first aspect, the fastening body has a diameter that can be inserted into a mounting hole of a member to be fastened, and the outer end is covered with a diameter. A large diameter portion provided with an outward flange abutting on the surface of the fastening member, a small diameter portion narrower by a predetermined dimension than this, and the large diameter portion and a tapered portion between the small diameter portions are coaxial. The slider is formed with a bottom and has a diameter that can be inserted into the mounting hole, has a diameter substantially equal to that of the slider, and can be expanded by the tapered portion by compression in the axial direction. A lock member formed of an elastic body having a longitudinally provided cut in the peripheral wall is provided at the upper portion of the small diameter portion of the fastening body, and the slider is rotated non-rotatably on the small diameter portion in the axial direction. It is held so that it can move freely, and the screwing operation from the outside A fastening screw rod that pushes the lock member outward to expand the diameter and screw the slider so that it can be pressed against the back surface of the member to be fastened passes through the bottom wall of the center hole of the fastening body and the bottom wall of the slider. A fastener characterized by being screwed into a screw hole is characterized.

Further, according to the present invention, the fastening body has a diameter capable of being inserted into the mounting hole of the member to be fastened, and an outer end provided with an outward flange which is in contact with the surface of the member to be fastened. The large part, the small diameter part thinner by a predetermined dimension than this, and the large diameter part, the tapered part between the small diameter parts are formed coaxially,
The slider has a bottom wall having a diameter that can be inserted into the mounting hole by a spring material, and is erected integrally from the bottom wall peripheral edge, and at the tip, is expanded outward along the tapered portion, A plurality of locking pieces having locking pieces that are inclined outward and bent so as to be engaged with the back surface of the member to be fastened, wherein the slider is formed by the plurality of locking pieces. By force, the exterior is held in the small diameter portion,
A locking screw rod that expands each lock piece by screwing operation from the outside and that screws the slider so that it can be pressed against the back surface of the member to be fastened passes through the bottom wall in the center hole of the fastening body and the slider. The fastener is screwed into a screw hole in a bottom wall of the fastener.

According to the first aspect of the present invention, the lock member and the slider are sequentially provided from the bottom to the small diameter portion of the lower portion of the fastening body in advance, and are further penetrated through the bottom wall of the center hole of the fastening body. A fastening screw rod is inserted into the through hole from the outside (upper part) and screwed into a screw hole provided on the bottom wall of the slider, so that the fastening body, the slider, and the lock member can be integrally held. It is made up of one part.

When the fastener is dropped from the outside (upper side) into a mounting hole formed in the member to be fastened and inserted, the outward flange at the upper end of the large-diameter portion of the fastening body is fitted to the member to be fastened. The outer peripheral portion (surface) of the mounting hole is piled up and abutted.

Next, when a tool (driver) is inserted into the center hole from the outside and the tightening screw is operated by screwing, the screw is screwed into the screw hole, whereby the slider moves upward in the drawing, Thereby, the lock member is also pushed upward. As a result, first, the inner peripheral edge of the opening at the outer end (upper end) of the lock member abuts on the tapered portion of the fastening main body, and the lock member is further pushed up by the slider, so that the diameter is increased along the tapered portion. Then, the upper end surface abuts on the peripheral portion (back surface) inside the opening of the mounting hole in the member to be fastened.

Further, when the lock member is pushed up by the slider, the lock member is compressed in the axial direction against its resilient force, so that the upper end surface is pressed against the inner peripheral portion of the opening, thereby The fastening is completed. At this time, the lock member plays a role similar to that of the sprung washer due to its elasticity, so that the lock member hardly rattles and the loosening is prevented by the large fastening strength.

Further, in the same manner as described above, the slider is externally mounted on the small diameter portion at the lower portion of the fastening body from below, and inserted into the through hole provided on the bottom wall of the center hole from the outside (upper). By screwing the threaded rod into a screw hole engraved on the bottom wall of the slider, a single component that integrally holds the fastening body and the slider is configured.

Next, when the fastener configured as described above is inserted into the mounting hole of the member to be fastened from above, the fastening screw is screwed from above, whereby the slider rises as shown in the drawing. Then, the locking piece at the tip provided on each of the locking bullets connected to this abuts against the tapered portion of the connecting body, and each locking bullet is pushed outward along the tapered portion. Accordingly, when the slider is further lifted by further tightening the fastening screw rod, the locking piece of each locking bullet is moved to the peripheral portion (back surface) in the opening of the mounting hole of the member to be fastened.
, And the fastener is attached to the member 5 to be fastened. Also in this case, since the plurality of lock pieces are attached to the lower surface of the member to be fastened against the resilience thereof, they have the same effect as the sprung washer, and looseness and rattling are provided. Hardly occurs and a large fastening strength is obtained.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 to FIG.
1 is a longitudinal sectional view showing a state in which a fastener, which is a receiving seat of a movable handrail, is fastened to a baslim, which is a member to be fastened, and FIG.
FIG. 3 is a longitudinal sectional view showing another embodiment in the same state as FIG.
1 is a side view showing a part of the embodiment shown in FIGS. 1 and 2 in a state of being fastened in a bus limb, FIG. 4 is an exploded perspective view showing the fastener shown in FIG. 2, and FIG. FIG. 6 is a side view showing a cross-section of a part of a state in which the members to be fastened are cross-sectionally illustrated. FIG.

1 to 6, reference numeral 1 denotes a fastening body,
Reference numeral 2 denotes a slider, 3 denotes a lock member, 4 denotes a fastening screw rod, 5 denotes a member to be fastened such as a baslim, and 6 denotes a tool (driver).

As shown in FIGS. 1 to 6, the fastening body 1 has an outward flange 1d extending from the outer periphery of the upper end.
A large-diameter portion 1a having an upper portion is formed at an upper portion, a small-diameter portion 1b finer than the large-diameter portion 1b is formed at a lower portion, and the tapered portion 1c is formed of the large-diameter portion 1a and the small-diameter portion. 1b, the shafts are united to be integrated.

As shown in FIG. 3, the diameter v of the outward flange 1d of the fastening member 1 is set to be larger by a predetermined dimension than the inner diameter u of the mounting hole 5a opened in the member 5 to be fastened. As a result, as shown in FIGS. 1 and 2, the outer peripheral portion of the mounting hole 5a is brought into abutment with the outer peripheral portion of the mounting hole 5a, while the diameter w of the large-diameter portion 1a is increased.
Is set smaller by a predetermined dimension than its inner diameter u so that it can be inserted into the mounting hole 5a.

In the case of the embodiment shown in FIG. 1, the fastening body 1 has a center hole 1e recessed, and a through hole 1g provided at the center of the bottom wall 1f has the above-mentioned fastening screw 4 as the center. Hole 1
e is inserted from inside. Here, as in the embodiment shown in FIGS. 2 and 4, the center hole 1e of the fastening body 1 is vertically penetrated, and the screw plug 1i is screwed into the screw hole 1h engraved below the center hole 1e. May be screwed to form the bottom wall 1f. In such a case, a through hole 1g is formed in the center of the screw plug 1i, and the fastening screw 4 is inserted through the through hole 1g. .

As shown in FIGS. 1, 2 and 4, the slider 2 is formed in a cup shape by a bottom wall 2a and a peripheral wall 2b, and as shown in FIG.
Is formed to be the same as or slightly smaller than the diameter u of the mounting hole 5a so that it can be inserted into the mounting hole 5a from above.

Further, the slider 2 is inserted into the outer periphery of the small diameter portion 1b of the fastening body 1 from below and does not rotate around the axis, but slides in the axial direction (vertical direction in the figure). A ridge 2c vertically provided on the inner surface of the peripheral wall 2b of the slider 2 and a small-diameter portion 1b so as to be freely movable.
And a groove 1j which is vertically drilled is engaged with each other.

Next, the lock member 3 will be described with reference to FIGS. 1 to 6. As shown in FIG. 1 to FIG.
The inner diameter is the same as or slightly larger than the diameter of the small diameter portion 1b of the fastening body 1, and is set smaller than the diameter w of the large diameter portion 1a. The peripheral wall is formed so as to be slidable in the axial direction, and the diameter of the peripheral wall is increased by pressing and moving the slider 2 upward from the lower portion with respect to the tapered portion 1c. A slit 3a is vertically drilled.

Therefore, the lock member 3 and the slider 2 are
After the fitting is inserted into the small diameter portion 1b of the fastening body 1 sequentially from the lower portion, the tool 6 is inserted into the center hole 1e of the fastening body 1 from the upper portion, and the fastening screw 4 is screwed. To
Screw hole 2 penetrating to the center of bottom wall 2a of slider 2
3, the fastening body 1, the slider 2, the locking member 3, and the fastening screw 4 can be integrated into one piece as shown by a solid line in FIG. . Therefore, in this state, the fastener is mounted in the mounting hole 5a of the member 5 to be fastened as shown by a two-dot chain line in FIG.
Can be inserted from above. In this inserted state, if the tightening operation of the tightening screw rod 4 is performed by the tool 6 from the outside, the tightened state as shown in FIGS. 1 and 2 becomes possible as described above.

In FIG. 5, reference numerals 5a and 5a denote respective mounting holes opened to the members to be fastened 5, 5, respectively.
Z indicates the corresponding plate thickness range of the member to be fastened in the fastener.

Next, the invention of claim 2 shown in FIGS. 7 and 8 will be described below.
The difference from the first embodiment is that a plurality of (four in the illustrated example) locking bullets 7 are spaced from the periphery of the bottom wall 2a of the slider 2 at a predetermined interval in the circumferential direction. ‥ is extended inclining upward and inward, and the locking piece 7a in which the upper end (tip) of each of the lock bullets 7, 7 ‥‥‥ is inclined upward and outward is bent. It is. And
In this case, the slider 2, each lock bullet 7,
7 ‥‥‥ is formed by pressing a spring material such as a leaf spring to give each lock elastic piece 7, 7 ‥‥‥ an elasticity in the axial direction, that is, inward. Small diameter part 1 of fastening body 1
b is inserted and covered from the lower part, so that the lock bullets 7
Due to the elasticity of ‥‥‥, the slider 2 is held in a non-rotational state with respect to the small diameter portion 1b and slidably held in the axial direction.

Accordingly, in this case, as shown by the solid line in FIG. 8, the component is formed into one component, and as shown by the two-dot chain line in FIG. 5a
Then, after inserting from above, if the tightening screw 4 is tightened with a tool (not shown) from above, the slider 2 is lifted up, and the locking bullets 7, 7 ‥‥‥
The locking pieces 7a, 7a # at the tip of the tapered portion 1c
And further pushed up while being pushed outward along the tapered portion 1c, and as shown in FIG. 7, the tips of the locking pieces 7a and 7a
, Thereby completing the attachment of the fastener.

2, 4 and 7, reference numeral 8 denotes a cap, and 9 denotes a spring which pushes up and urges the cap 8, and these are, as already described with reference to FIG. Is used to fit the slidable lower end d of the handrail c, but it is not necessary when it is simply used to fasten the members to be fastened.

[0034]

Since the present invention is constructed as described above, according to the first aspect, each member can be pre-assembled as one part, so that it can be installed in the mounting hole of the member to be fastened. After the member is inserted from the outside, the fastening operation can be completed only by the screwing operation of the fastening screw rod from the outside, so that the fastening operation can be performed quickly and easily, and particularly, the fastening operation from the back side. Even in places where it is difficult to work, it does not hinder the work, it can be easily drilled as a mounting hole for the member to be fastened, and it is possible to use a thin plate of the member to be fastened. It is possible to cope with this by giving a considerable width to thick ones.In addition, since the lock member is made of an elastic body and performs the same function as the sprung washer, there is no loosening or backlash, By tightening with a screw rod, Deal of fastening strength can be obtained.

According to the second aspect of the present invention, since a plurality of lock pieces are formed integrally with the slider, the number of components can be reduced, and the slider and the lock piece can be easily formed by pressing the sprung material by pressing or the like. Since it can be easily formed, it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a fastener according to the first aspect of the present invention in a use state.

FIG. 2 is a longitudinal sectional view of the same other fastener in use.

FIG. 3 is an explanatory side view partially in section showing a state in which the fastener is inserted into a mounting hole of a member to be fastened.

FIG. 4 is an exploded perspective view of another fastener shown in FIG. 2;

FIG. 5 is a side view of a partial cross section in a case where two members to be fastened are fastened to each other by the fastener according to FIGS. 1 and 2;

FIG. 6 is an explanatory front view showing a range of plate thickness corresponding to a member to be fastened of the fastening tool in FIGS. 1 and 2;

FIG. 7 is a longitudinal sectional view of the fastener according to the second aspect of the present invention in a used state.

FIG. 8 is an explanatory side view partially in section showing a state in which the fastener is inserted into a mounting hole of a member to be fastened.

FIG. 9 is a perspective view showing a movable handrail provided in a bathroom and a receiving seat for a handrail as a fastener.

FIG. 10 is a perspective view showing a conventional fastener in a state before fastening.

FIG. 11 is a perspective view showing another conventional fastener in a state before fastening.

FIG. 12 is a perspective view showing a conventional different fastener in a state before fastening.

FIG. 13 is a perspective view showing a conventional different type fastener in a state before fastening.

FIG. 14 is a perspective view of a conventional other type of fastener in a state before fastening.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1a Large diameter part 1b Small diameter part 1c Taper part 1d Outward flange 1e Center hole 1f Bottom wall 2 Slider 2a Bottom wall 3 Lock member 3a Cut 4 Fastening screw 5 Fastened member 5a Mounting hole 7 Lock bullet 7a Piece

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display F16B 9/02 F16B 9/02 L

Claims (2)

[Claims] 1. A large-diameter portion having a diameter that can be inserted into a mounting hole of a member to be fastened, and an outer end provided with an outward flange that is in contact with the surface of the member to be fastened. A small diameter portion narrower by a predetermined dimension and a tapered portion between the large diameter portion and the small diameter portion are formed on the same axis, and the slider has a bottom and a diameter that can be inserted into the mounting hole. A lock member formed of an elastic body having a substantially same diameter as the slider, and a longitudinally extending cut in a peripheral wall so that the diameter can be expanded by the tapered portion by compression in the axial direction, is provided. An exterior is provided at the upper part of the small-diameter portion, and the slider is non-rotated at the small-diameter portion, and is externally held so as to be slidable in the axial direction.
A fastening screw rod that pushes the lock member outward to expand the diameter and screw the slider so that it can be pressed against the back surface of the member to be fastened passes through the bottom wall at the center hole of the fastening body and the bottom of the slider. A fastener screwed into a threaded hole in a wall. 2. A large-diameter portion having a diameter capable of being inserted into a mounting hole of a member to be fastened, and having an outward flange provided at an outer end thereof to be in contact with a surface of the member to be fastened. The slider is formed coaxially with a small-diameter portion narrower by a predetermined dimension and a tapered portion between the large-diameter portion and the small-diameter portion, and the slider has a bottom having a diameter that can be inserted into the mounting hole by a spring material. Walls and
The tip is integrally erected from the periphery of the bottom wall, and the tip is expanded outward along the tapered portion and inclined outward to be engaged with the back surface of the member to be fastened. A plurality of lock bullets having locking pieces, and the slider is externally held by the small diameter portion by the spring force of the plurality of lock bullets, and each slider is screwed from the outside. A fastening screw rod for expanding the lock bullet and screwing the slider so that it can be pressed against the back surface of the member to be fastened passes through the bottom wall of the center hole of the fastening body and is screwed into the screw hole of the bottom wall of the slider. A fastener characterized by being combined.