JP2834056B2 - Anchor fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to expanding an inner end of an anchor socket inserted into a hole formed in a wall or the like with a bolt screwed into the anchor socket, and expanding the anchor socket. The present invention relates to an anchor fitting in which a part of a bolt is left so as to be firmly retained.

[0002]

2. Description of the Related Art Conventionally, many types of post-installed anchors have been provided. For example, 62-18
In the expansion anchor described in Japanese Patent No. 413, a split groove is formed at one end of a sleeve, a plug having a trapezoidal cross section is inserted into the split groove, and the plug is inserted into the groove. And stop at one end to expand one end of the sleeve, so that the sleeve is supported in the hole, and if a bolt is screwed into the sleeve, the bolt is supported by the sleeve. Japanese Patent Application Laid-Open No. 6-330 describes a similar device.
No. 525 and Japanese Unexamined Patent Publication (Kokai) No. 6-116953.

In the driving anchor described in Japanese Patent Application Laid-Open No. Sho 59-147110, a split groove is formed at one end of a sleeve, and a conical taper having a predetermined length is formed on an inner surface of the sleeve. When the push-spread member inserted into the hole is driven toward the bottom of the hole, the tapered portion expands. The same thing as this, 5-9
There is an anchor described in Japanese Patent No. 4333.

[0004]

However, in order to expand one end of the sleeve, the sleeve or the push-out member is driven into the hole, for example, a metal fitting for hanging a picture on a wall of a building or furniture falling. In the case of attaching a metal fitting for prevention, there is a possibility that the wall body or a decorative wall provided separately from the wall body may be damaged or destroyed, or the wallpaper may be peeled off. Vibration shock is so intense that neighbors are inconvenienced.

Further, in the case of expanding the sleeve or the like by impact, unless the depth of the hole formed in the wall is made accurate, the required withdrawal strength which is expected to be too deep cannot be obtained, and it is difficult to confirm the strength. In addition, there is a drawback that the projection length from the wall body is not uniform and the appearance is not good.

When driving the sleeve into the wall,
A special tool consisting of a driving rod with a head into which the sleeve is screwed is required, and without it, the hem of the sleeve cannot be expanded without it.

Further, most of the anchors provided so far have at least three or more parts, and it is difficult to reduce the number of parts to less than three. Therefore, there is a limit in reducing the cost. If the parts were missing, they could not be used.

Further, there is no special means for surely checking whether or not the hem of each sleeve has expanded after attaching a large number of anchors to the wall or the ceiling. When a load is applied to a bolt that is screwed into a sleeve that is not completely supported on the wall or ceiling without being supported, there is a risk that the sleeve will easily fall off.

Accordingly, the present invention provides an anchor which can be firmly supported without smashing to expand the root portion and has a small number of parts.

[0010]

An anchor according to the present invention has an opening at one end and a threaded portion on an inner peripheral surface, and ribs are formed on an outer peripheral surface on one end side at predetermined intervals in a circumferential direction. An axial socket is formed on the other end side at predetermined intervals in the circumferential direction, and an anchor socket having a tapered portion formed on the inner peripheral surface on the other end side. A head having a ratchet portion formed at one end, which is engaged with a rotation stop, is divided by a circumferential groove for cutting, and a screw portion is engraved on an outer peripheral surface and is screwed into the anchor socket. It is characterized by the following.

The ribs are formed on the outer peripheral surface of the anchor socket at predetermined intervals in the circumferential direction so as to be linear in the axial direction.
The rib is formed spirally in the axial direction on the outer peripheral surface of the anchor socket, and the cross-sectional shape of the rib is substantially triangular,
The ribs are formed continuously in the longitudinal direction, the ribs are formed discontinuously in the longitudinal direction, or the anchor socket has a collar portion at an end on the side where the bolt is screwed in to prevent overdriving. An annular groove for confirming bolt tightening is formed on the end face of the flange, and a predetermined height for engaging the annular groove with the screw head of the bolt and slidingly contacting the groove bottom to leave a sliding mark. In this case, a protrusion for confirming the tightening of the bolt is integrally formed, and a concave portion having a screw portion formed on the inner peripheral surface is formed on the screw head of the bolt.

Therefore, when the anchor socket is inserted into a hole formed in a wall or the like, and the bolt is rotated forward and screwed into the anchor socket, the head slides on the tapered portion and the other end of the anchor socket expands. Open and bite into the hole inner wall,
Then, when the bolt is rotated in the reverse direction, the circumferential groove for cutting is twisted, the head remains in the expanded portion of the anchor socket, and the bolt can be removed from the anchor socket.

When the bolt is completely screwed into the anchor socket and the other end of the anchor socket is expanded, the protrusion of the screw head of the bolt is formed into an annular groove formed on the end face of the flange of the anchor socket. If a bolt is removed and a sliding mark is observed at the bottom of the annular groove in order to make a sliding mark on the bottom, it can be surely checked whether the skirt of the anchor socket has expanded or not.

Further, another embodiment of the anchor according to the present invention has an opening at one end and a threaded portion on an inner peripheral surface,
A rib is formed on the outer peripheral surface on one end side, axial split grooves are formed on the other end side at predetermined intervals in the circumferential direction, and a tapered portion is formed on the inner peripheral surface on the other end side. An anchor socket, a bolt engraved with a screw portion on the outer peripheral surface and screwed into the anchor socket, and movable while rotating in the screwing direction integrally with the bolt,
And a head remaining in the anchor socket after the anchor socket is expanded.

Therefore, when the anchor socket is inserted into a hole formed in a wall or the like, and the bolt is rotated forward and screwed into the anchor socket, the taper portion of the anchor socket slides while the head rotates integrally with the bolt. The other end of the anchor socket expands and bites into the inner wall of the hole. When the bolt is reversely rotated, the head is separated from the bolt and remains in the expanded portion of the anchor socket, and the bolt can be removed from the anchor socket.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the anchor includes an anchor socket 1 and a bolt 2, and the bolt 2 is screwed into the anchor socket 1.

In the anchor socket 1, axial ribs 3 are formed at predetermined intervals in the circumferential direction on an outer peripheral surface of a cylindrical body having a predetermined length, and a screw portion 4 is formed on an inner peripheral surface as shown in FIG. One end is opened and the other end is closed to form a split groove 5 of a predetermined length, and the other end side has an outer peripheral surface formed with a step-like annular convex and concave root 6. A tapered portion 7 is formed on the inner peripheral surface on the other end side. The root portion 6 is radially expanded outward through the split groove 5 and can bite into the inner wall of the hole.

As shown in FIG. 3, the anchor socket 1 has a spiral rib 3 on the outer peripheral surface of a cylindrical body having a predetermined length.
a may be formed. The helix may be clockwise or counterclockwise. Although the number of the ribs 3a is one, a plurality may be provided. Further, a flange 1a may be formed at the end of the anchor socket 1 on the side where the bolt 2 of the cylindrical body having a predetermined length is screwed. The other configuration is the same as that of the anchor socket 1 in FIG. 2 described above, and thus the same components are denoted by the same reference numerals and detailed description is omitted.

When the anchor socket 1 is driven into the building wall 15 (see FIG. 7) by forming the spiral rib 3a, the anchor socket 1 itself is rotated and screwed through the rib 3a, and the building wall 15 is improved. Further, by forming the flange portion 1a in the anchor socket 1, it serves as a stopper for preventing excessive driving into the building wall 15, closes the opening of the hole 16, improves the appearance, and improves the appearance. To prevent water from leaking into the room.

Although the ribs 3 and 3a have a substantially triangular cross section, the present invention is not limited to this, and the ribs 3 and 3a may be conical or polygonal pyramid-shaped projections. Any shape may be used as long as it enhances the connection with the building wall 15 without causing
In addition, although it is formed continuously in a linear or curved shape in the longitudinal direction, it may be formed in a discontinuous manner in a dotted line.

The bolt 2 has a predetermined length which is completely screwed into the anchor socket 1, and has a hexagonal screw head 8 formed at one end as shown in FIG. A circumferential groove 10 for cutting is formed on the other end side. A ratchet portion 12 in the axial direction is formed in the head 11 divided by the circumferential groove 10 without forming the screw portion 9. Are formed at predetermined intervals.

The ratchet portion 12 prevents the bolt 2 from rotating when the bolt 2 is turned in the reverse direction without entering the split groove 5 when the bolt 2 is screwed into the anchor socket 1. Can be. The bolt 2 is formed with a predetermined cross section (diameter) such that the bolt 2 is twisted off from the cutting circumferential groove 10 during the reverse rotation, and the head 11 can be pushed to the innermost portion of the anchor socket 1 during the forward rotation.

Note that, as shown in FIG.
a in a screw head 8 of FIG.
a may be formed. The bolt 2a inserts the anchor socket 1 into each of a pair of holes drilled apart from the concrete ceiling, and the anchor socket 1
After the screw 2a is screwed to the innermost part, the head 11 is rotated in the reverse direction to leave the head 11 in the anchor socket 1 and the anchor socket 1 is fixed to the ceiling. A hanging bolt is inserted into 8a and screwed into the screw portion 8b and fixed, and an angle member is horizontally hung between the pair of hanging bolts, and wiring and piping are placed on the angle member and laid behind the ceiling. Can be used for

Further, the head 11 of the bolt 2 is
As shown in FIG. 5B, a head 11 having a polygonal cross section may have a ratchet portion 12 formed at a corner thereof, and as shown in FIGS. 5C and 5D, a quadrangle or a hexagon may be used. The cross section may be a polygon. In this case, the ratchet portion 12 is not formed, but the vertex (corner) of the polygon is formed.
12a functions to change into the ratchet portion 12. Other configurations are the same as those of the bolt 21 in FIG.

Therefore, as shown in FIG.
Holes 16 and 18 into which the anchor socket 1 is to be inserted are drilled in a decorative wall 17 spaced apart therefrom by a drill or the like.
As shown in FIG.
Tap lightly with a hammer or the like to insert. It is desirable to insert a sleeve 19 into the hole 18, and the end face of the anchor socket 1 is positioned so as not to protrude from the face of the decorative wall 17.

When the bolt 2 is screwed into the anchor socket 1 as shown in FIG. 7B, the ribs 3 of the anchor socket 1 bite into the inner wall of the hole 16 to prevent the anchor socket 1 from rotating together. The ratchet part 12 does not slide on the split groove 5 and does not bite into it, so that the bolt 2 can be completely screwed into the anchor socket 1.

Then, as shown in FIG. 7C, when the head 11 reaches the end of the root 6, the root 6 is expanded toward the inner wall of the hole 16 via the tapered portion 7, and the root 6 is Dig into its inner wall. Therefore, when the bolt 2 is rotated in the reverse direction, the ratchet portion 12 enters the split groove 5 and the rotation of the head 11 is prevented. In this state, when the bolt 2 is further rotated in the reverse direction, the bolt 2 Through the head 11, and the bolt 2 comes out of the anchor socket 1, leaving the head 11 in the root 6.

Therefore, the anchor socket 1 has the hole 16
As shown in FIG. 7 (D), when the angle member 20 is attached to the unbolted bolt 2 and screwed into the anchor socket 1 again, the decorative wall 17 is not damaged. Since the support for wall hanging is formed with good appearance and firmly, furniture can be connected to the support for use as a part of measures to prevent falling due to an earthquake or the like, or a picture or the like can be hung. The angle member 20 may be inserted into the bolt 2 from the beginning, and the bolt 2 may be freely removed from the anchor socket 1.

In the above embodiment, the example of embedding in the building wall body 15 having the decorative wall 17 has been described. However, the present invention is not limited to this example. Obviously, it can be used for construction as an anchor.

Thus, according to the present invention, the head 11 is composed of only two parts, the anchor socket 1 and the bolt 2, and the bolt 2 is rotated in the anchor socket 1 in the reverse direction.
Is left in the anchor socket 1 so that it can be unscrewed, so that the bolt 2 can be freely attached and detached, and the angle material 20 and the like can be freely changed.

As shown in FIG. 8, an annular groove 1b is formed in the end face of the collar portion 1a of the anchor socket 1, while
As shown in FIG. 9, the flange 1 is attached to the screw head 8 of the bolt 2.
The protrusion 8c that engages with the annular groove 1b is integrally formed on the flange contacted by a. The tip of the projection 8c is an annular groove 1b.
Height that can contact the groove bottom 1c. Therefore, at the stage where the bolt 2 is completely screwed into the anchor socket 1 and the root portion 6 is completely expanded in the hole, FIG.
As shown in FIG. 0, the protrusion 8c slides on the groove bottom 1c, leaving a sliding mark. Therefore, by removing the bolt 2 from the anchor socket 1 and observing the presence or absence of the sliding mark, it is possible to check whether or not the root portion 6 is surely expanded, and it is possible to confirm the degree of bolt tightening. Things.

Also, the head 2 is rotated by rotating the bolt 2 in the reverse direction.
In order to omit the work of giving the torque to twist the
As shown in FIG. 11, the head 36 may be configured separately from the bolt 2. The head 36 is of a so-called cone type, and the tapered portion 7 of the anchor socket 1 abuts on the outer peripheral surface of the cone so that the root portion 6 can be expanded.

In this case, the screw portion of the bolt 2 and the head 36
Are formed at the ends of the helical steps 30, 31, respectively.
As shown in FIG. 12B, the spiral step 30 is formed by dividing the end surface of the threaded portion 9 of the bolt 2 by a center line 32 and forming one of the ends into a flat surface 33 and the other into a spiral slope 34. Therefore, a step 35 is formed at the center line 32 between the flat surface 33 and the slope 34. The helical step 31 is formed on the end face of the head 36 in a symmetrical manner.

Therefore, when the helical steps 30 and 31 abut each other, the two flat surfaces 33 and the slopes 34 coincide with each other to form a shaft body intricately and complementarily without any gap, and the head 36 is fixed to the bolt 2. Become a part of. Therefore,
When the bolt 2 is rotated forward, the head 3
When the bolt 6 rotates forward with the bolt 2 and the bolt 2 rotates in the reverse direction, the contact of the step 35 is released and the head 36 remains in the anchor socket 1.

[0035]

According to the present invention described above, since the root of the anchor socket is expanded by applying a rotational force to the bolt, and the head is cut off by applying a reverse rotational force to leave the head in the anchor socket. It can be constructed with only a quiet rotating force without the need for special tools as in the past and without the impact force that generates impact or sound, thus causing damage and damage to the wall. There is no fear, and it is suitable for construction to attach fall prevention fittings such as wall hangings, furniture, office equipment such as computers in the building.

Further, since the head to be screwed is in sliding contact with the tapered portion in the anchor socket to expand the root portion and bite the root portion into the inner wall of the hole, but not to hit the head, the anchor socket is not used. It is not necessary to carefully and precisely construct the depth of the hole into which the hole is to be inserted, so it is rough enough and the projection length of the anchor socket or bolt can be made uniform regardless of the depth of the hole, so that the construction is easy. In addition, construction with high supporting force can be performed, and the work of checking the pull-out strength is not required.

In addition, since only two parts, the anchor socket and the bolt, are sufficient, the number of parts can be reduced, manufacturing, storage, and management can be simplified, and furthermore, the cost can be reduced.

Further, since the annular groove is formed on the end face of the flange portion of the anchor socket, and the projecting portion which slides on the annular groove is formed on the screw head of the bolt in contact with the end face, the other end of the anchor socket is expanded. In this case, a sliding mark is formed in the annular groove, so that it is possible to reliably check whether the anchor socket has expanded.

Since the head is formed so as to be rotatable with respect to the bolt, the number of parts is three, but the work of applying a torque for twisting the head can be omitted. Convenience can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view (A), a plan view (B), an aa sectional view (C), and a bottom view (D) showing a component (anchor socket) of the present invention.

FIG. 3 is a longitudinal sectional front view (A), a plan view (B), an aa sectional view (C) and a bottom view (D) showing another example of the anchor socket.

FIG. 4 is a longitudinal sectional front view (A), a plan view (B), and a bb sectional view (C) showing components (bolts) of the present invention.

FIGS. 5A and 5B are longitudinal sectional front views (A), bb sectional views (B), (C), showing other examples of the component (bolt) of the present invention.
(D)

FIG. 6 is an exploded view of a construction example.

FIG. 7 is an explanatory view of a construction process.

FIG. 8 is an enlarged sectional view (A) and a plan view (B) of a main part showing still another example of the anchor socket according to the present invention.

FIG. 9 is an enlarged cross-sectional view of a main part (A) and a cross-sectional view taken along the line cc (B) showing still another example of the bolt according to the present invention.

FIG. 10 is a view for explaining the operation of the anchor shown in FIGS.

FIG. 11 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 12 is an exploded side view (A), (C) and an end view (B) of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Anchor socket 1a ... Collar part 1b ... Annular groove 2 ... Bolt 3, 3a ... Rib 4, 9 ... Screw part 5 ... Split groove 6 ... Root part 7 ... Tapered part 8 ... Screw head 8a ... Recessed part 8b ... Screw part 8c ... Protrusion 10: Cutting peripheral groove 11, 36: Head 12: Ratchet 30, 30, Helical step 33: Flat surface 34: Slope 35: Step

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16B 13/08 E02D 5/80 F16B 13/06 F16B 13/13

Claims (11)

(57) [Claims] 1. An end portion has an opening and a threaded portion on an inner peripheral surface, a rib is formed on an outer peripheral surface on one end side, and an axial split groove is formed on the other end side at a predetermined interval in a circumferential direction. And an anchor socket having a tapered portion formed on the inner peripheral surface on the other end side, and a head formed with a ratchet portion which engages with the split groove at the time of reverse rotation to form a rotation stop. It is divided by a circumferential groove for cutting, and a bolt is formed on the outer peripheral surface by threading a screw portion and screwed into the anchor socket. An anchor fitting characterized in that it remains in the anchor socket. 2. An end portion has an opening and a threaded portion on an inner peripheral surface, a rib is formed on an outer peripheral surface on one end side, and an axial split groove is provided on the other end side at a predetermined interval in a circumferential direction. An anchor socket formed with a tapered portion on the inner peripheral surface on the other end side, a bolt engraved with a screw portion on the outer peripheral surface and screwed into the anchor socket, and abutted against the bolt. An anchor comprising: a head which is integrally movable in a screwing direction and which remains in the anchor socket after the anchor socket is expanded. 3. An anchor according to claim 1, wherein the ribs are formed on the outer peripheral surface of the anchor socket at predetermined intervals in the circumferential direction and linearly in the axial direction. 4. An anchor according to claim 1, wherein the rib is formed on the outer peripheral surface of the anchor socket in a spiral shape in the axial direction. 5. An anchor according to claim 1, wherein said rib has a substantially triangular cross section. 6. The anchor according to claim 1, wherein the rib is formed discontinuously in the longitudinal direction. 7. The anchor socket according to claim 1, wherein a flange for preventing over-strike is formed at an end on which the bolt is screwed.
Anchor fitting as described. 8. An annular groove for confirming tightening of a bolt is formed on an end face of the collar portion.
An anchor according to 3, 4, 5, 6 or 7. 9. A bolt screwing confirmation protrusion of a predetermined height, which is engaged with the annular groove and slidably contacts the groove bottom, is integrally formed on the screw head of the bolt. 8
Anchor fitting as described. 10. The screw head of the bolt is formed with a concave portion having a threaded portion formed on an inner peripheral surface thereof. Anchor fitting as described. 11. A butt end portion between the bolt and the head,
The anchor fitting according to claim 2, wherein the flat surface and the helical slope are engaged by a helical step formed with the step interposed.