JPH10159185A - Anchor fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage, impact noise, etc., of a building material due to impact of an anchor socket, reduce the number of part items and save loabor of rotational operating force of an anchor bolt. SOLUTION: An anchor fitting is furnished with an anchor socket 2 press fitted and fixed in the inside of a concrete hole and an anchor bolt 3 to be screwed from an opening of one end part 5 of the anchor socket 2. A slit 13 is formed on the other end part 6 of the anchor socket 2, and a head 16 to extend and open the other end part 6 by press fitting it on an inner peripheral surface 6b of the other end part 6 is integrally provided on a head end part 15a of a shaft part 15 of the anchor bolt 3. A groove for cutting to cut a boundary part 19 by torsional torque more than specified generated by a torque difference of fastening torque of the shaft part 15 and sliding frictional torque against the other end part inner peripheral surface 6b of the head 16 is formed on the boundary part 19 of the shaft part 15 and the head 16.

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 tubular anchor socket which is inserted and fixed in a fixing hole of a building material and has both ends formed with an opening, and an anchor bolt which is screwed into the one end of the anchor socket through a female screw formed in one end of the anchor socket. A vertical groove is formed along the axial direction on the peripheral wall of the other end of the anchor socket, while the other end of the anchor socket is press-fitted into the other end of the anchor socket at the tip of the shaft of the anchor bolt. A head for expanding the portion, and a torque difference between the tightening torque of the anchor bolt and the friction torque of the head against the inner peripheral surface of the other end of the anchor socket at a boundary between the head and the tip of the shaft. A cutting groove for cutting the boundary portion by a predetermined or more torsional torque generated in the step is formed.

[0011] The invention according to claim 2 is characterized in that a cylindrical anchor socket which is inserted and fixed in a fixing hole of a building material and has both ends formed with an opening, and a female screw portion formed in one end of the anchor socket. An anchor bolt screwed into the one end portion, and a peripheral wall at the other end portion of the anchor socket,
While forming a vertically split groove along the axial direction, a head for press-fitting into the other end of the anchor socket and expanding the other end is provided at the tip of the shaft of the anchor bolt, and A cutting groove is formed at the boundary with the tip of the shaft portion, and a locking means for locking at the other end side opening edge of the anchor socket is provided at the tip of the head. A boundary portion is cut through the cutting groove by the reverse rotation torque of the anchor bolt in a state of being locked to the end opening edge.

In the invention according to claim 3, a flange-shaped rib is provided on the outer periphery of the other end of the anchor socket on the distal end side, and the outer diameter of the rib is set to be larger than the inner diameter of the fixing hole of the building material. It is characterized by:

The invention according to claim 4 is characterized in that the inner peripheral surface of the other end of the anchor socket is formed in a tapered shape in which the diameter of the distal end is gradually reduced.

According to a fifth aspect of the present invention, the vertical groove at the other end of the anchor socket extends to substantially the center of the anchor socket.

According to a sixth aspect of the present invention, a female screw portion formed on the inner peripheral surface of one end portion of the anchor socket is formed on the opening side of one end portion, and from the formation end of the female screw portion to a substantially central portion of the anchor socket. A cylindrical guide groove having a diameter slightly larger than the root diameter of the female screw portion is formed on the inner peripheral surface of the anchor bolt, and the guide groove slides on the outer peripheral surface of the base located on the boundary side of the head of the anchor bolt. The invention according to claim 7, wherein a flange portion that can be crushed by a predetermined radial compression torque is provided, wherein the flange portion has an external thread that is screwed to the internal thread portion on an outer peripheral surface. And the length in the longitudinal direction of the head is set to a length that can be crushed by a predetermined radial compression torque.

[0016]

1 to 3 show a first embodiment of an anchor according to the present invention. The anchor is inserted and fixed in a concrete hole 1 of a ceiling wall C of concrete as a building material. The anchor socket 2 includes a cylindrical anchor socket 2 and an anchor bolt 3 that is screwed into the anchor socket 2 from an opening at one end thereof. Concrete hole 1
Are preliminarily drilled from below in the ceiling wall C.

The anchor socket 2 is shown in FIGS.
As shown in FIGS. 1A and 1B, a cylindrical body 4 having a predetermined length and having openings 4a and 4b formed at both ends is provided. An outer peripheral surface 5a of one end 5 of the cylindrical body 4 has a twisted shape. The plurality of ribs 8 are 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 of the tubular main body 4. . The peripheral wall of the one end 5 near the opening 4a has an outer peripheral surface formed in a tapered shape having a large diameter toward the bottom in the figure, and a lower end surface 5b having a maximum diameter thereof 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
A slit 13 is formed as four vertically-divided grooves which allow deformation in the direction of diameter expansion or diameter reduction. It is extended to the vicinity.

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.

When the head 14 is screwed into the anchor socket 2 on the outer peripheral side of one end face 14a, the head 14 is crushed by a pressing force against a lower surface of an angle member 21 to be described later and press-fitted into a small diameter projection 14b.
Are provided.

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

The head 16 is provided with a tip 15 of a shaft 15.
a is formed in a shaft shape having substantially the same diameter as that of the shaft portion 15, and the length in the axial direction is such that the tip portion 16 a protrudes from the other end opening 4 b when inserted into the anchor socket 2 together with the length of the shaft portion 15. The length is set, and the outer peripheral surface 16b is a flat surface without screws 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 20 is formed at the boundary 19 between the tip 15a of the shaft 15 and the head 16. When the head 16 is inserted into the anchor socket 2 and the anchor bolt 3 is tightened through the shaft portion 16 and the male and female screw portions 9 and 17 of the one end portion 5, the cutting groove 20 is used for the anchor bolt 3. 3 and the outer peripheral surface 16b of the head 16 with respect to the inner peripheral surface 6b of the other end 6.
The depth is set to a depth that can be cut by a predetermined or more torsional torque generated at the boundary portion 19 due to a torque difference between the sliding friction torque and the sliding friction torque.

Hereinafter, the operation of the present embodiment will be described 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. After that, when one end 5 is further hit with a hammer or the like and pushed into the concrete hole 1,
The anchor socket 2 includes a torsion rib 8 and a helical rib 10.
Is press-fitted while turning by the guide action of
The inner peripheral surface 1a of the concrete hole 1
As shown in FIG. 5, the other end 6 is pushed inward through a plurality of slits 13 while being reduced in diameter. In particular, the amount of diameter reduction deformation of the distal end side is increased by the annular rib 12, and conversely, a large reaction force is generated in the diameter increasing direction, and the inner peripheral surface 1a of the concrete hole 1 is formed.
Therefore, it is possible to firmly hold the entire anchor socket 2 with a relatively strong force. Further, since the torsion ribs 8 and the spiral ribs 10 bite into the inner peripheral surface 1a of the concrete hole 1 to increase the frictional resistance, the anchor socket 2
A more secure and reliable temporary fixing can be achieved. Therefore, it is not necessary to hold the anchor socket 2 by hand particularly in the upward operation, and the subsequent operation 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 of the annular rib 12 in the radially expanding direction, and the one end 5 is fixed. 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. Further, the opening edge 1b of the concrete hole 1 is closed in a water-tight manner, and a sealing function is exhibited to prevent water from falling from the concrete hole 1, and the appearance can be improved.

Further, since the torsional 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 into the anchor socket 2 which has been temporarily temporarily fixed. First, the distal end 16a of the head 16 is connected to one end 5a.
Male screw portion 1 of shaft portion 15 while being inserted through opening 4a of
7 is screwed into the female thread 9 on the inner peripheral surface of the one end 5, and then
The head 14 is turned by a tool such as a spanner and screwed in.
Then, as shown in FIG. 7, the outer peripheral surface 16b of the head 16 rotating synchronously with the shaft portion 15 gradually and strongly comes into pressure contact with the inner peripheral surface 6b of the other end portion 6 in the reduced diameter state of the anchor socket 2.
Then, due to the torque difference between the sliding friction torque between the anchor bolt 3 and the inner peripheral surface 6b of the other end of the anchor socket 2 due to the turning of the head 16 and the tightening rotation torque of the anchor bolt 3, a predetermined or more torsional torque is applied to the boundary 19. When this occurs, the boundary 19 is twisted off by the cutting groove 20. In other words, the shaft portion 15 is in the middle of the screwing of the anchor bolt 3.
And the head 16 is divided.

Thereafter, when the anchor bolt 3 is further screwed in, the head 16 pushes the inside of the other end portion 6 in a straight line without being rotated by the pressing force of the shaft portion 15 thereafter. At the same time as the tip 16a projects from the other end 6 opening 4b as shown in FIG.
8 firmly engages with the hole edge 4c of the opening 4b. At this time, the other end 6 is pushed open by the head 16 through the slit 13 in the radially enlarged direction.
2 and the annular rib 10 bite into the inner peripheral surface 1a of the concrete hole 1 more strongly, and the anchor socket 2 is inserted into the inner peripheral surface 1a.
Can be held firmly.

Next, as shown in FIG. 9, when the anchor bolt 3 is rotated in the reverse direction and pulled out from the anchor socket 2, the shaft 16 and the separated head 16 are separated by the locking force of the locking claw 18. The annular rib 1 remains in the end 6 and
Even if a strong reaction force in the diameter reducing direction of the other end portion 6 acts on the other end portion 6, the escape from the anchor socket 2 is reliably prevented.

Subsequently, as shown in FIG. 10, a predetermined angle member 21 is attached to the anchor bolt 3 and screwed into the anchor socket 2 again, and the angle member 21 is attached to the ceiling wall C or the like via the anchor socket 2. It becomes possible to attach firmly and securely.

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 prior art, 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.

Moreover, since the shaft portion 15 of the anchor bolt 3 and the head 16 are separated by torsion torque during the pushing, the head 16 can be pushed in a straight line without rotating it. The sliding frictional resistance between the outer peripheral surface 16b of the head 16 and the inner peripheral surface 6b of the other end 6 becomes sufficiently small. As a result, the tightening operation force of the anchor bolt 3 can be reduced, and the entire mounting work of the anchor socket 2 and the like can be easily performed, and the mounting work efficiency can be greatly improved.

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 in the radially expanding direction of the other end 6 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. Therefore, the subsequent screwing work of the anchor bolt 3 becomes easy, and
Safety is improved.

Further, since the inner peripheral portion 6b of the other end 6 is formed in a tapered shape, 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.
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.
Are pressed against the inner circumferential surface 1a of the concrete hole 1 to obtain a three-point pressed state, so that the opposing force against the external force in the pulling-out direction and the horizontal direction is increased, and the holding force of the anchor socket 2 is further increased.

Therefore, the inner peripheral surface 1a of the concrete hole 1 on the other end 6 side is surely prevented from being damaged due to the swinging of the anchor socket 2 which is likely to occur in the case of two-point pressure contact between the other end 6 and the one end 5. It is possible to prevent the anchor socket 2 from being accidentally pulled out due to an increase in the diameter of the hole 1 due to such damage.

The torsion rib 8 cuts into the inner peripheral surface 1a of the concrete hole 1 to impart a strong holding force to the anchor socket 2 in the rotation direction. The swiveling of the anchor socket 2 when it is inserted can be reliably restricted. For this reason, the screwing work of the anchor bolt 3 becomes easy.

Moreover, as described above, the anchor socket 2
Since the force against the external force in the pulling-out direction and the horizontal direction increases, the mounting strength of the anchors mounted on the same building material becomes uniform and constant. Therefore, the reliability of attachment by the anchor is improved.

FIGS. 11A and 11B show another example of the anchor bolt 3 used in the present invention, in which the locking claw at the tip 16a of the head 16 is omitted. Other configurations such as the cutting groove 20 are the same as those of the previous embodiment.

Therefore, although the head 16 which has moved straight after the screwing of the anchor bolt 3 is projected from the opening 4b at the other end 6 of the anchor socket 2, it does not engage with the opening edge by the engaging claw. 12, the edge of the hole of the opening 4b bites into the outer peripheral surface 16b due to a large deformation force in the diameter reducing direction, so that a relatively strong locking force is obtained.
Can be prevented from accidentally slipping out.

Moreover, by eliminating the locking claws,
Manufacturing workability is improved, and cost is also advantageous.

FIGS. 12 and 13 show a second embodiment of the present invention, in which a guide groove 22 is mainly formed inside the anchor socket 2 and a flange portion 23 is formed on the outer peripheral surface of the anchor bolt 3. .

More specifically, the anchor socket 2
12A and 12B, the other end 6 of the tubular main body 4
The outer diameter of the outer peripheral surface 6a is set to be substantially uniform, and the inner diameter of the inner peripheral surface 6b is also set to be uniform. The spiral rib 10 formed on the outer peripheral surface 6a
Is formed with a larger number of turns than that of the first embodiment, and a single large-diameter annular rib 12 is provided integrally at the tip, not double.

Further, four vertically crossed slits 13 formed in the peripheral wall of the other end 6 in the longitudinal direction are formed in a tapered shape from the center 7 to the leading edge of the other end 6. The other end 6 is formed such that the amount of diameter reduction at the tip end side is increased.

A female screw portion 9 is formed on the inner peripheral surface of the one end portion 5 of the cylindrical main body 4 from the edge of the opening 4a to about 1/3 of the length of the one end portion 5, A cylindrical guide groove 22 is formed from the edge of the female screw portion 9 on the inner peripheral surface to the vicinity of the central portion 7.

The guide groove 22 has an inner peripheral surface 22a formed to be flat, and has a uniform inner diameter slightly larger than the inner diameter of the valley portion of the female screw portion 9.

Further, an annular stopper 24 having a stepped diameter is formed on the other end 6 side of the guide groove 22.

On the other hand, as shown in FIG. 13, the anchor bolt 3 is basically the same as that of the first embodiment, and has a head portion 14 and a shaft portion 15 having a male screw portion 17 formed on the outer peripheral surface and a head portion. 16, the tip of the shaft 15 and the head 16
A cutting groove 20 is formed at a boundary 19 between the cutting groove 20 and the cutting groove 20.

The head 1 near the cutting groove 20
6, a flange portion 23 is formed on the outer peripheral surface. The flange portion 23 has a substantially annular shape, and the outer peripheral surface has the shaft portion 1.
A male screw 23a having the same diameter as the male screw part 17 on the outer circumference 5 is formed, and a length L of the head 16 in the longitudinal direction is set to a length of about two peaks of the male screw 23a. Therefore, the flange portion 23 is slidably movable in the guide groove 22 and has a short length L of about two ridges. The thread can be collapsed.

Therefore, the operation of this embodiment is basically the same as that of the first embodiment.
As shown in, for example, the action of inserting the anchor bolt 3 into the anchor socket 2 when a part C1 of the gravel kneaded and dispersed in the concrete composition forming the ceiling wall C is exposed in a part of the concrete hole 1. It is in. In other words, when the concrete hole 1 is drilled,
As shown in FIG. 4, there is a problem in that a relatively large gravel C1 is applied to the inner peripheral surface of the concrete hole 1 to expose the inside of the hole.

More specifically, the anchor socket 2
As shown in FIG. 15, the other end 6 is pushed into the concrete hole 1 while hitting it with a hammer or the like while reducing the diameter through a plurality of slits 13, and the other end 6 itself is linear. The annular rib 12, the spiral rib 10, and the torsional rib 8 bite into the inner peripheral surface 1a and are firmly held. Next, as shown in FIGS. 15 and 16, first, while inserting the head 16 of the anchor bolt 3 through the opening 4 a of the anchor socket 2, the male screw portion 17 of the shaft portion 15 is inserted.
Is screwed into the female screw portion 9, and then the head portion 14 is turned with a tool such as a spanner to screw the entire body into the male screw portion 9.
Are guided in sliding contact with the inner peripheral surface 22 a of the guide groove 22, whereby the head 16 pushes linearly while rotating inside the other end 6.

When a predetermined or more torsional torque is generated at the boundary 19 due to the torque difference between the sliding friction torque due to the turning of the head 16 and the tightening rotational torque of the anchor bolt 3, the torsion is cut off from the cutting groove 20. The shaft 15 and the head 16 are separated during the screwing of the anchor bolt 3 as in the first embodiment. After that, when the anchor bolt 3 is further screwed in, the head 16 is
Due to the pressing force of 5, the anti-swing portion 23 is pushed forward while sliding on the inner end surface 6b of the other end 6 in a straight line while being guided by the inner peripheral surface 22a of the guide groove 22 without rotating.

Further, when the tip 16a of the head 16 pushes the inside of the other end 6, as shown in FIG.
a, a force acts to push the other end 6 in the expanding direction, so that the annular rib 12 is located at the portion 1 where the gravel C1 is in contact.
In 2a, the expansion deformation is restricted by the gravel C1, and only the opposite side 12b side is expanded and deformed. For this reason, the upper end of the other end 6 is inclinedly deformed in the direction of the opposite portion 12b, and the axis X1 of the anchor bolt 3 and the axis X2 of the other end 6 are shifted in the radial direction. Therefore, at this time, the head 16 locally receives a large reaction force in the bending direction from the inner peripheral surface of the other end portion 6 on the one side portion 12a side. In other words, at this time, the vicinity of the central portion 6c of the other end portion 6 is pressed against the inner peripheral surface 1a of the concrete hole 1, so that the pressed position (near the central portion 6c) becomes the fulcrum of the head 16,
A bending moment is generated at one end 23b of the flange portion 23 opposite to the direction in which the head 16 is bent, and the entire head 16 is bent in a reverse shape in the direction opposite to the gravel C1 as shown in the figure. At the same time, one end 23b of the flange 23 presses against the inner end face 22a of the guide groove 22, and a compressive force of a predetermined torque acts. For this reason, the male screw 23a thread on the one end 23b side is crushed, and the entire head 16 is inclined in the bending direction. As a result, the point of action of the head 16 in the rectilinear direction substantially coincides with the axis X2 of the bent other end portion 6, and the head 1
The reaction force from the one side portion 12a of the annular rib 12 to the ring 6 is reduced. In other words, by tilting the head 16 along the bent shape of the other end 6 by the crushing action of the flange 23, the unbalanced load received from the inner peripheral surface 6 b of the other end 6 is reduced.

For this reason, the head 16 suppresses an increase in sliding frictional resistance with the inner peripheral surface 6b of the other end portion 6, and as a result,
Even if the head 1 is pushed while pushing due to gravel C1, etc.
Even if a bending force is generated in the anchor bolt 6, the turning torque of the anchor bolt 3 can be reduced. Therefore, the shaft 1
In addition to the reduction in sliding resistance due to the linear movement of the head 16 resulting from the separation of the head 5, the tightening operation force of the anchor bolt 3 can be reduced.

Further, when the anchor bolt 3 is further screwed in from the above point, the head end 16a is moved to the position shown in FIG.
When the flange 23 projects from the opening 4b of the other end 6 by a predetermined length 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 of the annular rib 12 and the annular rib 12
And the anchor socket 2 is firmly held by the inner peripheral surface 1a.

Next, as shown in FIG. 18, the anchor bolt 3 is reversed and pulled out, and the angle member 21 is mounted and fixed again by the anchor bolt 3 as in the first embodiment.

Other functions and effects are the same as those of the first embodiment.

The present invention is not limited to the configuration of each of the above embodiments, and the cutting groove 20 may be intermittent instead of being annular, and the depth of the cutting groove 20 is determined by the amount of the protrusion of the anchor bolt 3. Can be set to a depth that allows cutting at any position according to the conditions. That is, the shaft portion 15 and the head 16 after the manufacturing process
The depth may be set such that the anchor socket 2 can be cut off halfway while being pushed while ensuring the integrity of the anchor socket 2.

Further, the spiral rib 11 may be a plurality of annular ribs, and the cross-sectional shape of the torsion rib 8 may be not only triangular but also conical or polygonal. Any shape may be used as long as the shape enhances the bondability with the concrete hole 1 as long as it does not hinder the anchor socket 2 from being driven into the building material.

[0063]

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 accurately set the depth of the fixing hole of the building material into which the anchor socket is to be inserted. The projection lengths of the anchor sockets or the anchor bolts can be made uniform regardless of the above.

Further, the number of parts can be reduced, the workability of manufacturing processing can be improved, and the cost can be reduced.

Further, according to the first aspect of the present invention, since the head is screwed off from the shaft during the screwing of the anchor bolt, the head can be pushed in a straight line instead of rotating thereafter. . Thereby, the sliding frictional resistance between the other end of the anchor socket and the head is sufficiently reduced as compared with the case of rotation. As a result, the labor for tightening the anchor bolts can be reduced, the work of mounting the anchor socket can be facilitated, and the efficiency of the mounting work can be improved.

According to the third aspect of the present invention, since the outer diameter of the rib is made larger than the inner diameter of the fixing hole, the reaction force of the other end in the diameter expanding direction when the anchor socket is pushed into the fixing hole is reduced. growing. As a result, a strong and reliable temporary fixing state with respect to the fixing hole of the anchor socket is obtained.

According to the fourth aspect of the present invention, since the inner peripheral surface of the other end is formed in a tapered shape, the reaction force in the radially increasing direction of the other end is further increased in conjunction with the increase in the diameter of the rib. Thus, a stronger holding force of the anchor socket can be obtained.

Further, according to the fifth aspect of the present invention, a strong pressing force can be obtained at three points of one end, the other end, and the center of the anchor socket with respect to the fixing hole. The opposing force is increased, and the holding force of the anchor socket is further increased. In particular, the metal contact near the center is prevented by the strong pressing force at the center of the anchor socket.

According to the sixth aspect of the present invention, an uneven load is generated in the bending direction from the other end of the anchor socket to the head when the head is pushed forward due to gravel or the like exposed in the concrete hole. However, since the head can be inclined in the bending direction of the other end by the collapse of the flange portion,
An increase in sliding friction resistance between the outer peripheral surface of the head and the inner peripheral surface of the other end is suppressed. As a result, an increase in the tightening operation force of the anchor bolt is suppressed, and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of an anchor of 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, and FIG. 3B is a longitudinal sectional view of the anchor bolt.

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

FIG. 5 is a diagram illustrating the operation of the embodiment.

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

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

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

FIG. 9 is a diagram illustrating the operation of the embodiment.

FIG. 10 is an operation explanatory view of the embodiment.

FIG. 11A is a front view showing another example of the anchor bolt,
B is a longitudinal sectional view of the anchor bolt.

FIG. 12A is a front view of an anchor socket provided in a second embodiment of the present invention, and FIG. 12B is a longitudinal sectional view of the anchor socket.

FIG. 13 is a front view of the anchor bolt provided in the second embodiment.

FIG. 14 is an operation explanatory view of the embodiment.

FIG. 15 is a diagram illustrating the operation of the embodiment.

FIG. 16 is an operation explanatory view of the embodiment.

FIG. 17 is an operation explanatory view of the embodiment.

FIG. 18 is an operation explanatory view of the 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 screw part 12 ... annular rib 13 ... slit (longitudinal groove) 15 ... shaft part 16 ... head 17 ... male screw part 18 ... locking claw 19 ... boundary part 20 ... cutting groove 22 ... guide groove 22a ... inner peripheral surface 23 ... Flange

Claims (7)

[Claims] 1. A tubular anchor socket which is inserted and fixed in a fixing hole of a building material and has both ends formed with an opening, and is screwed into said one end portion via a female screw portion formed in one end portion of said anchor socket. An axially extending vertical groove is formed on the peripheral wall of the other end of the anchor socket, while being press-fitted into the other end of the anchor socket at the distal end of the shaft of the anchor bolt. A head for expanding the other end is provided, and a tightening torque of an anchor bolt and friction of the head against the inner peripheral surface of the other end of the anchor socket are provided at a boundary between the head and the tip of the shaft. An anchor fitting characterized in that a cutting groove for cutting the boundary portion by a predetermined or more torsional torque generated by a torque difference from a torque is formed. 2. A cylindrical anchor socket which is inserted and fixed in a fixing hole of a building material and has both ends opened, and is screwed into said one end portion via a female screw portion formed in one end portion of said anchor socket. An axially extending vertical groove is formed on the peripheral wall of the other end of the anchor socket, while being press-fitted into the other end of the anchor socket at the distal end of the shaft of the anchor bolt. And a head for expanding the other end is provided, a cutting groove is formed at a boundary between the head and the tip of the shaft, and an opening at the other end of the anchor socket is provided at the tip of the head. A locking means for locking to the edge is provided, and the boundary 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. Characterized by anchor gold Utensils. 3. An anchor socket, wherein a flange-shaped rib is provided on the outer periphery of the distal end of the other end of the anchor socket, and the outer diameter of the rib is set to be larger than the inner diameter of the fixing hole of the building material. Item 3. An anchor according to item 1 or 2. 4. The anchor according to claim 1, wherein the inner peripheral surface of the other end of the anchor socket is formed in a tapered shape in which the diameter of the distal end gradually decreases. 5. The anchor according to claim 1, wherein the vertical groove at the other end of the anchor socket extends to substantially the center of the anchor socket. 6. A female screw formed on an inner peripheral surface of one end of the anchor socket is formed on an opening side of the one end, and a female screw is formed on an inner peripheral surface from a forming end of the female screw to a substantially central portion of the anchor socket. While forming a cylindrical guide groove slightly larger in diameter than the valley diameter of the portion, the guide bolt slides in the guide groove on the base outer peripheral surface located on the boundary side of the head of the anchor bolt and has a predetermined radial direction. 6. An anchor according to claim 1, wherein said flange is provided with a flange which can be crushed by said compression torque. 7. The flange portion has an external thread on an outer peripheral surface thereof which is screwed into the female thread portion, and the length in the longitudinal direction of the head is set to a length that can be collapsed by a predetermined radial compression torque. 7. The setting is set.
Anchor fitting as described.