JPH10110475A - Anchor metal fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage in construction materials or hitting sounds by hitting an anchor socket, at the same time, reduce the number of components and to save rotational control force of an anchor bolt. SOLUTION: An anchor metal fixture is equipped with an anchor socket 2 pressed into a concrete hole 1 to fix and an anchor bolt 3 screwed in from an opening of one end 5 of the anchor socket 2. Then, while a slit 13 is formed in the other end 6 of the anchor socket 2, a head 16 pressed into the inside circumference 6b and widely opened is monolithically formed in the front end of an axis section 15 of the anchor bolt 3. A nut 19 is monolithically provided to the lower end face 14a of the head 14 in the anchor bolt 3, at the same time, when the front end 16a of the head 16 is interlocked with an opening edge 4c of the other end in a boundary 20 between the head 14 and nut 19, a cutting groove 21 for cutting off the boundary 20 with opposite torque of the nut 19 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor fitting for expanding an end of an anchor socket inserted into a fixing hole formed in a wall or the like with an anchor bolt screwed into the anchor socket.

[0002]

2. Description of the Related Art Conventionally, many types of post-installed anchors of this type have been provided.
No. 8413 discloses an anchor fitting in which a vertically split groove is formed at one end of a sleeve, and a plug having a trapezoidal cross section is inserted into the groove, and the sleeve is driven into the hole by a special tool. Because the sleeve stops at the bottom and expands one end of the sleeve, the sleeve is supported in the hole, and when a bolt is screwed into the sleeve, the bolt is supported by the sleeve. A similar thing to this is disclosed in
There is an anchor fitting described in JP-A-330525 and JP-A-6-116953.

In the driving anchor described in JP-A-59-147110, a vertically split groove is formed at one end of a sleeve, and a conical taper having a predetermined length is formed on an inner surface thereof. When the push-out member inserted into the sleeve is driven toward the bottom of the hole, the tapered portion expands. Similar to this, there is an anchor fitting described in Japanese Utility Model Laid-Open No. 5-94333.

[0004]

However, in the above-mentioned conventional anchor, the sleeve and the push-out member are driven into the hole in order to expand one end of the sleeve. Therefore, for example, when attaching a metal fitting for hanging a picture to a wall or a metal fitting for preventing furniture from falling down using the anchor metal, for example, a wall or a decorative wall provided separately from the wall. May be damaged or destroyed, or the wallpaper or the like may peel off. In addition, the vibration and impact at the time of the driving are so severe that it inconveniences neighbors and the like.

Further, when the sleeve or the like is expanded by impact, the depth of the hole formed in the wall must be made accurate. If it is too deep, the required required pull-out strength cannot be obtained. In addition, it is difficult to confirm the strength, and there is a drawback that the length of the projection from the wall is irregular and the appearance is deteriorated.

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

Furthermore, most of the anchors provided so far require at least three or more parts, so that a large number of parts not only increases the cost but also reduces the efficiency of the manufacturing operation. Inviting.

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 the bolt is screwed onto the sleeve and the load is not fully supported on the wall or ceiling, there is a risk that the sleeve will easily fall out of the hole.

Accordingly, the present invention provides an anchor having a small number of parts, which can be firmly supported without hitting the sleeve or the like for expanding.

[0010]

According to the first aspect of the present invention,
A cylindrical anchor socket having both ends opened, and an anchor bolt screwed into the inside from one end side opening of the anchor socket, and a vertical groove is formed along the axial direction on a peripheral wall at the other end of the anchor socket. On the other hand, a head for expanding the other end of the anchor socket through the vertical groove is integrally provided at the tip of the shaft of the anchor bolt, and an inner peripheral surface is provided at the outer end of the head of the anchor bolt. A nut having a female screw formed integrally therewith, and a cutting groove for cutting said boundary portion with a predetermined rotational torque is formed at a boundary portion between said head portion and said nut.

According to a second aspect of the present invention, a locking means is provided at the tip end of the head for locking the opening edge of the other end when the tip protrudes from the opening at the other end of the anchor socket. The boundary portion is cut through the cutting groove by the reverse rotation torque of the anchor bolt in a state where the tip of the head is locked to the opening edge of the other end.

According to a third aspect of the present invention, the locking means includes:
It is characterized by being formed by an annular locking claw.

[0013]

1 to 3 show an embodiment of an anchor according to the present invention. The anchor is a tube which is inserted and fixed into a concrete hole 1 of a ceiling wall C made of a building material. An anchor socket 2 having the shape of an arrow, and an anchor bolt 3 screwed into the interior of the anchor socket 2 from one end opening. The concrete hole 1 is previously drilled in the ceiling wall C from below.

The anchor socket 2 is shown in FIGS.
As shown in FIGS. 1A and 1B, a cylindrical main body 4 having a predetermined length and having openings 4a and 4b formed at both ends is provided. A plurality of torsion-shaped outer peripheral surfaces 5a of one end 5 of the cylindrical main body 4 are provided. The rib 8 is formed substantially along the axial direction, and a female screw portion 9 is formed on the inner peripheral surface of the one end portion 5 so as to extend to the inner peripheral surface of the central portion 7. The peripheral wall near the opening 4a of the one end portion 5
The outer peripheral surface is formed in a tapered shape having a large diameter toward the bottom in the figure, and a lower end surface 5b having the maximum diameter is formed in an annular shape.

On the other hand, the other end 6 of the cylindrical main body 4 is
The outer diameter of the central portion 7 is gradually reduced from the outer peripheral surface 7a of the central portion 7 to the distal end edge on the side of the opening 4b, and the inner peripheral surface 6b is similarly formed from the inner peripheral surface of the central portion 7 to the opening 4a. Hole edge 4c
The taper shape is gradually reduced up to. A helical rib 10 in the same direction as the torsion rib 8 is integrally formed substantially at the center of the outer peripheral surface 6a of the other end, and double annular ribs 11 and 12 are integrally formed at the distal end. Is formed.

Further, on the peripheral wall of the other end portion 6, the other end portion 6 is provided.
To allow for deformation in the direction of diameter expansion or diameter reduction
A slit 13 which is one of the vertically divided grooves is formed, and the length of the slit 13 extends from the leading edge of the other end 6 to approximately the center 7.

The twisted rib 8 at the one end 5 is
The spiral rib 10 and the annular ribs 11 and 12 at the other end 6 are formed in a substantially trapezoidal cross section with the lower end side notched in the figure, and have a claw shape. Has become. Furthermore, the outer diameter of the annular rib 12 at the tip is set to be larger than the inner diameter of the concrete hole 1 and the outer diameter of the lower annular rib 11 and the spiral rib 10.

The anchor bolt 3 is shown in FIGS.
A and B, a hexagonal head 14 and the head 14
A shaft portion 15 integrally provided at the center of one end surface 14a of the first shaft portion, and a head 16 integrally provided at the tip of the shaft portion 15.

The head 14 extends relatively long in the axial direction, and has a female screw portion 14b extending from the center of the lower end surface 14a in FIG.
And a coaxial nut 19 is integrally provided on the lower end surface 14a. This nut 19
Has a hexagonal outer shape similar to that of the head 14, and a second female screw 19a having the same pitch as the female screw 14b is formed therein. The female threads 14b and 19a of the head 14 and the nut 19 are for screwing a suspension bolt 22 for suspending and supporting an angle member described later.

The shaft portion 15 has a predetermined length that is completely screwed into the anchor socket 2, and has a male screw portion 17 screwed with the female screw portion 9 of the anchor socket 2 over the entire outer peripheral surface.
Are formed.

The head 16 is formed in a shaft shape slightly smaller in diameter than the male screw diameter of the shaft portion 15, and its axial length is adjusted to the length of the shaft portion 15 when the head portion is inserted into the anchor socket 2. The length 16a is set to such a length as to protrude from the other end opening 4b, and the outer peripheral surface 16b is a flat surface without a male screw or the like. The distal end portion 16a of the head 16 has an outer peripheral surface 16b formed as a tapered surface with a gradually decreasing diameter toward the distal end side, and the anchor socket 2 when inserted into the axial center position.
An annular locking claw 18, which is locking means for locking to the inside of the anchor socket 2 by locking to the opening edge 4c at the other end of the anchor socket 2, is integrally formed.

An annular cutting groove 21 is formed at a boundary 20 between the head 14 and the nut 19.
The cutting groove 21 is used to connect the head 16 to the anchor socket 2.
When the head tip 16 protrudes from the other end opening 4b and the locking claw 18 is locked to the other end opening edge 4c to prevent slipping out, the nut 19 is rotated in the reverse direction. The depth is set to a value that can be cut by a predetermined or more torsional torque generated in the boundary portion 20 by the rotation torque.

The operation of this embodiment will be described below with reference to FIGS. That is, first, as shown in FIGS. 4 and 5, the anchor socket 2 is inserted into the concrete hole 1 from the other end 6 while lightly tapping the one end 5 from below with a hammer or the like to perform positioning. Thereafter, when the one end 5 is further struck with a hammer or the like and pushed into the concrete hole 1, the anchor socket 2 is press-fitted while rotating by the guide action of the torsion rib 8 and the spiral rib 10, and the other end 6 is pressed. An inward pressing force is applied to the large-diameter annular rib 12 on the inner peripheral surface 1a of the concrete hole 1, and the other end 6 is reduced in diameter through a plurality of slits 13 as shown in FIG. It is pushed in while being deformed. In particular, since the annular rib 12 increases the amount of diameter-reduction deformation at the distal end side, a large reaction force is generated in the radially expanding direction, and the anchor socket 2 is relatively strong on the inner peripheral surface 1a of the concrete hole 1. The whole can be held firmly. Further, since the torsional ribs 8 and the helical ribs 10 increase the frictional resistance due to the engagement with the inner peripheral surface 1a of the concrete hole 1, the anchor socket 2 can be more firmly and surely temporarily fixed. Therefore, it is not necessary to hold the anchor socket 2 by hand particularly in the upward work, and the subsequent work becomes extremely easy.

When the anchor socket 2 is completely press-fitted as shown in FIG. 6, a strong temporary fixing state is maintained by the reaction force in the radially expanding direction by the annular rib 12, and the one end 5 Since the lower end face 5b having the maximum diameter near the opening 4a is pressed against the opening edge 1b of the concrete hole 1 and functions as a stopper, it is possible to prevent the anchor socket 2 from being driven too much. In addition, the opening edge 1b of the concrete hole 1 is closed in a water-tight manner, and a sealing function is exerted, whereby water can be prevented from falling from the concrete hole 1 and the appearance can be improved.

Further, since the torsion rib 8 is formed in a substantially triangular cross section, the inner peripheral surface 1 of the concrete hole 1 is formed.
a of the spiral rib 11
Since the annular ribs 11 and 12 are claw-shaped, a strong locking force with respect to the inner peripheral surface 1a after the press-fitting is obtained, and the above-mentioned temporary fixing force can be further promoted.

Next, the anchor bolt 3 is screwed through the spring washer 23 into the anchor socket 2 which has been temporarily temporarily fixed. First, the distal end 16a of the head 16 is connected to the one end 5a. The male screw part 17 of the shaft part 15 is screwed into the female screw part 9 of the inner peripheral surface of the one end part 5 while being inserted into the inside from the opening 4a of the head part 5, and then the head 14 is turned by a tool such as a spanner and screwed. . Then, as shown in FIG. 7, the outer peripheral surface 1 of the head 16 rotating synchronously with the shaft 15
6b gradually and strongly presses against the inner peripheral surface 6b of the other end portion 6 of the anchor socket 2 in the reduced diameter state.

Thereafter, when the anchor bolt 3 is further screwed in, the head 16 also pushes the inside of the other end portion 6 while rotating by the pressing force of the shaft portion 15. The large-diameter annular rib 12 which has been expanded at the same time as the distal end 16a projects from the other end 6 opening 4b as shown in FIG.
The locking claw 18 is firmly locked to the hole edge 4c of the opening 4b by the strong reaction force in the diameter-reducing direction. At this point, the head 16
As a result, the other end 6 is pushed open in the radially expanding direction via the slit 13, so that each of the annular ribs 11, 12 and the annular rib 10 bites into the inner peripheral surface 1 a of the concrete hole 1 more strongly, and the inner periphery of the anchor socket 2 becomes The surface 1a can be firmly held.

Next, as shown in FIG. 8, the male screw portion 22b on the outer peripheral surface of the tip end portion 22a of the suspension bolt is screwed into the nut 19 and the female screw portions 19a and 14b of the head portion 14 from below.
The suspension bolt 22 is tightened with a predetermined tool.

Subsequently, when only the nut 19 is reversely rotated from this state with a tool such as a spanner, the boundary portion 20 is cut by the torsional torque generated in the boundary portion 20 by the reverse rotation torque as shown in FIG. The nut 19 is separated from the head 14 by being twisted off by the groove 21.

Thereafter, as shown in FIG. 10, when the nut 19 is rotated forward again and tightened, the nut 19 functions as a double nut, and the suspension bolt 22 is firmly connected to the head 14 of the anchor bolt 3. It becomes possible to do.

Therefore, the anchor socket 2 and the anchor bolt 3, which are firmly and securely fixed to the ceiling wall C,
The suspension bolts 22 can be reliably and stably connected via the nuts 19.

As described above, according to the present embodiment, since it is not necessary to apply a hit to expand the distal end portion of the anchor socket as in the conventional case, the wall may be damaged or damaged by the hitting force. Can be prevented, and the generation of an impact sound can also be prevented.

Further, since it can be composed of two parts, the anchor socket 2 and the anchor bolt 3, the number of parts can be reduced, the manufacturing work can be improved, and the cost can be reduced. Especially,
Since the nut 19 is also formed integrally with the anchor bolt 3 in advance, the number of parts can be further reduced, and parts management becomes easier.

In addition, after the anchor bolt 3 is connected to the anchor socket 2, the nut 19 can be easily cut off from the boundary portion 20 via the cutting groove 21 to immediately function as a double nut. Bolt 22
A large improvement in the efficiency of the mounting work can be achieved, and a strong mounting state can be obtained.

Further, since the outer diameter of the annular rib 12 at the other end 6 is set to be larger than the inner diameter of the concrete hole 1, the reaction force of the other end 6 in the diameter-expanding direction when pushed into the concrete hole 1 is large. Become. As a result, a strong and reliable temporary fixing state with respect to the inner peripheral surface 1a of the concrete hole 1 of the anchor socket 2 is obtained. Thereafter, the work of screwing the anchor bolts 3 becomes easier and the safety is improved.

Further, the inner peripheral portion 6b of the other end 6 is formed in a tapered shape, so that the diameter of the other end 6 is increased in accordance with the enlargement of the diameter of the annular rib 12 and the pushing of the head 16. Of the anchor socket 2 with respect to the inner peripheral surface 1a of the concrete hole 1 is further increased.

Further, since the plurality of slits 13 of the anchor socket 2 extend almost to the vicinity of the central portion 7, when the anchor bolt 3 is screwed into the anchor socket 2 as described above, the pushing force of the head 16 causes the anchor socket 3 to be pushed. In addition to the other end 6 of FIG. 2, the center 7 is also deformed in the radially expanding direction through the slit 13 to form the inner peripheral surface 1 of the concrete hole 1.
The outer peripheral surfaces 6a and 7a and the lower end surface 5b are pressed against a. Therefore, the anchor socket 2 completely buried in the concrete hole 1 has the other end 6, the center 7 and the one end 5 pressed against the inner peripheral surface 1 a of the concrete hole 1, respectively.
Since a three-point pressure contact state is obtained, the holding force of the anchor socket 2 is further increased. Therefore, the other end 6 and one end 5
Damage of the inner peripheral surface 1a of the concrete hole 1 on the other end 6 side due to the swinging of the anchor socket 2 which is likely to occur in the case of two-point pressure welding with the above, can be reliably prevented. Inadvertent detachment of the anchor socket 2 can be prevented.

The present invention is not limited to the configuration of the above-described embodiment. The cutting groove 21 may be intermittent instead of being annular, and its depth is limited by the reverse rotation torque of the nut 19. It can be set to a depth that can be easily cut according to. That is, the anchor bolt 3 and the nut 19 after the manufacturing process are performed.
The depth may be set so that the nut 19 can be cut by an arbitrary reverse rotation torque while ensuring the integrity of the nut 19.

Accordingly, even if the locking force of the locking claw 18 at the opening edge 4c at the other end is not obtained, the frictional resistance between the head 16 and the inner peripheral surface 6b of the other end 6 and the tightening torque of the shaft 15 can be used. It is also possible to cut the nut 19 with the reverse rotation torque within a range where the anchor bolt 3 does not rotate. Therefore,
The locking claw 18 is not always required to cut the nut 19.

The cross-sectional shape of the torsional rib 8 may be not only triangular but also conical or polygonal. In short, the concrete hole 1 and the concrete hole 1 are not hindered when the anchor socket 2 is driven into the building material. Any shape may be used as long as the shape enhances the binding property of.

[0041]

As is apparent from the above description, according to the present invention, the other end of the anchor socket is expanded by the pressing force of the head due to the screwing of the anchor bolt, and the shaft and the head are cut off. As a result, the head is left in the anchor socket, so that it is possible not only to eliminate the necessity of a special tool as in the related art, but also to prevent damage or damage to the building material due to impact, and also to prevent the generation of an impact sound.

Further, as described above, since the opening is not expanded by hitting, it is not necessary to insert the anchor socket and to precisely construct the depth of the fixing hole of the building material. The projection lengths of the anchor sockets or the anchor bolts can be made uniform regardless of the above.

Further, it is possible to reduce the number of parts, to improve the efficiency of manufacturing and processing operations, and to reduce the cost. In particular, since the nut can be formed integrally with the anchor bolt, the number of parts can be further reduced, and parts management can be facilitated.

Further, after the anchor bolt is connected to the anchor socket, the nut can be easily cut off from the head of the anchor bolt through the cutting groove and can immediately function as a double nut. A great improvement in the efficiency of the mounting operation can be achieved, and a strong mounting state can be obtained.

According to the second aspect of the present invention, by utilizing the locking force of the locking means, it is possible to reliably prevent the accidental removal of the anchor bolt from the anchor socket and to reduce the large reverse rotation torque for the nut. Since the nut can be provided, the nut can be easily and easily separated from the head.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an anchor according to the present invention.

FIG. 2A is a front view of an anchor socket provided in the present embodiment, and FIG. 2B is a longitudinal sectional view of the anchor socket.

FIG. 3 is a front view of the anchor bolt provided in the embodiment.
B is a longitudinal sectional view of the anchor bolt.

FIG. 4 is a diagram illustrating the operation of the present embodiment.

FIG. 5 is an operation explanatory view of the present embodiment.

FIG. 6 is an operation explanatory view of the present embodiment.

FIG. 7 is an operation explanatory view of the present embodiment.

FIG. 8 is an operation explanatory view of the present embodiment.

FIG. 9 is an operation explanatory view of the present embodiment.

FIG. 10 is a diagram illustrating the operation of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Concrete hole (fixing hole) 2 ... Anchor socket 3 ... Anchor bolt 4 ... Cylindrical body 4a, 4b ... Opening 5 ... One end 6 ... Other end 6a ... Outer peripheral surface 6b ... Inner peripheral surface 7 ... Center 9 ... Female thread part 12 ... Circular rib 13 ... Slit (vertical groove) 14 ... Head 14a ... Lower end face 15 ... Shaft part 16 ... Head 17 ... Male thread part 18 ... Locking nail 19 ... Nut 20 ... Boundary part 21 ... Cutting groove

Claims (3)

[Claims] 1. An anchor socket comprising: a tubular anchor socket having both ends opened; and an anchor bolt screwed into an interior of the anchor socket through an end of the anchor socket. A head for expanding the other end of the anchor socket through the vertical groove is integrally provided at the tip of the shaft of the anchor bolt, and the outer end of the head of the anchor bolt is formed. In addition, a nut with a female screw formed on the inner peripheral surface is provided integrally,
An anchor fitting wherein a cutting groove for cutting the boundary by a predetermined rotational torque is formed at a boundary between the head and the nut. 2. An end of the head is provided with a locking means for locking the opening edge of the other end of the head when the end protrudes from the opening of the other end of the anchor socket. The anchor according to claim 1, wherein the boundary is cut through the cutting groove by reverse rotation torque of the anchor bolt in a state where the portion is locked to the opening edge of the other end. 3. An anchor according to claim 2, wherein said locking means is formed by an annular locking claw.