JP7339789B2 - Anchor and anchor construction method - Google Patents

Description

The present invention relates to an anchor and an anchor installation method.

Conventionally, when maintaining a structure (for example, a tunnel) made of concrete, mortar, stone, block, brick, etc., it is common to fix an object (for example, a backing plate) to the wall or ceiling surface of the structure. There are cases where anchors are used for the fixing work.
As a technique for installing anchors on the wall surface of a structure, a hole is formed in the wall surface of the structure, an anchor having a hollow portion is inserted into the hole and temporarily fixed, and then a resin material is inserted into the hole through the hollow portion of the anchor. is injected, the gap between the perforation and the anchor is filled with a resin material from the inner side of the perforation, and the resin material is cured and fixed secondarily (see, for example, Patent Document 1). ).

JP-A-2017-82478

By the way, when a structure is formed of blocks or bricks, the joint material at the joints of the blocks or bricks may deteriorate and be lost, and voids may be generated inside the structure due to the lack of the joint material. sometimes
Then, when the anchor is installed as in the technique of Patent Document 1, if the depth of the perforation and the gap are connected, the resin material injected into the perforation will flow into the gap.
If the resin material flows into the gap deep inside the perforation, the flow of the resin material may not be reversed appropriately in the deep part of the perforation, and the gap between the perforation and the anchor may not be properly filled with the resin material. It may be difficult to install an anchor with yield strength (withdrawal strength).

SUMMARY OF THE INVENTION An object of the present invention is to provide an anchor and an anchor installation method that can be suitably installed so as to have a predetermined yield strength.

In order to achieve the above object, one invention according to the present application is
an anchor body having a tip portion that is expanded while being inserted into a predetermined perforation, and a hollow portion that serves as a flow path for discharging the resin material injected from the rear end side from the tip portion side;
a perforation sealing member attached to the distal end of the anchor body and inserted into the perforation together with the anchor body;
a spreading member for spreading the distal end portion of the anchor body inserted into the bore;
An anchor comprising
The perforation sealing member is configured to have a size such that when it is inserted into the perforation, it slides against the hole wall of the perforation. ,
It is constructed so as to close the end of the hole connected to the gap at the back of the hole.
Further, in order to achieve the above object, one invention according to the present application is
an anchor body having a tip portion that is expanded while being inserted into a predetermined perforation, and a hollow portion that serves as a flow path for discharging the resin material injected from the rear end side from the tip portion side;
a perforation sealing member attached to the distal end of the anchor body and inserted into the perforation together with the anchor body;
a spreading member for spreading the distal end portion of the anchor body inserted into the bore;
An anchor comprising
The perforation sealing member is configured to have a size such that it slides against the hole wall of the perforation when inserted into the perforation.

With such an anchor, the perforation sealing member having a size that slides against the wall of the perforation can be packed into the perforation, and if there is a gap in the perforation, the space connecting to the gap can be closed. Therefore, the gap between the perforation and the anchor body can be satisfactorily filled with the resin material that is discharged from the distal end side of the anchor body and filled from the inside of the perforation.
If the gap between the perforation and the anchor main body can be satisfactorily filled with a resin material, the anchor main body can be firmly fixed to the perforation, so that the anchor can be preferably installed so as to have a predetermined yield strength. .

Also preferably:
The perforation sealing member is made of an elastically deformable material and has a cylindrical shape with a diameter larger than that of the perforation.

If a cylindrical perforation sealing member having a diameter larger than the diameter of the perforation is elastically deformable, the perforation sealing member is easily brought into close contact with the perforation wall when the perforation is inserted into the perforation, and is preferably brought into sliding contact with the perforation wall. be able to.

Also preferably:
The perforation sealing member is provided with a core material penetrating in the extending direction of the anchor body,
The core material is configured to maintain the posture of the perforation sealing member attached to the distal end portion of the anchor body.

When the perforation sealing member is pushed by the distal end of the anchor body and packed deep into the perforation, the perforation sealing member slides against the wall of the perforation, and therefore tends to tilt or disturb its posture. If the perforation sealing member is provided with a core material, the posture attached to the distal end of the anchor body can be maintained, and the perforation sealing member maintaining a predetermined posture can be stuffed deep into the perforation. can.

Further, another invention according to the present application is an anchor construction method,
a first step of stuffing a perforation sealing member that is in sliding contact with a hole wall of a predetermined perforation into the depth of the perforation to close the end of the perforation that leads to the gap at the depth of the perforation ;
a second step of inserting into the perforations an anchor body having a hollow portion serving as a flow path for discharging the resin material injected from the rear end side from the front end side;
a third step of expanding the distal end portion of the anchor body inserted into the bore and pressing the expanded distal end portion against the hole wall of the bore;
a fourth step of filling a resin material into the perforations through the hollow portions;
to have

With such an anchor construction method, a perforation sealing member having a size that slides against the hole wall of the perforation can be packed into the perforation, and if there is a gap in the perforation, the space connected to the gap can be closed. Therefore, the gap between the perforation and the anchor body can be satisfactorily filled with the resin material that is discharged from the distal end side of the anchor body and filled from the inside of the perforation.
If the gap between the perforation and the anchor main body can be satisfactorily filled with a resin material, the anchor main body can be firmly fixed to the perforation, so that the anchor can be preferably installed so as to have a predetermined yield strength. .

Also preferably:
When inserting the anchor body into the bore, the first step and the second step are performed simultaneously by bringing the bore sealing member into contact with the distal end portion of the anchor body and stuffing it into the bore. be done.

By doing so, the operation of stuffing the hole sealing member into the deep hole and the operation of inserting the anchor main body into the hole can be performed together, so that the working time can be shortened.
In other words, if the perforation sealing member is attached to the distal end of the anchor body so that the perforation sealing member is inserted into the perforation together with the anchor body, the operation of filling the perforation sealing member into the deep part of the perforation and the anchor body can be performed. The work of inserting into the perforation can be performed together.
Even if the perforation sealing member cannot be attached to the distal end of the anchor body, the perforation sealing member can be pushed into the perforation by the distal end of the anchor body. The work of stuffing the stop member and the work of inserting the anchor body into the bore can be performed together.

ADVANTAGE OF THE INVENTION According to this invention, an anchor can be installed suitably so that it may have predetermined|prescribed yield strength.

FIG. 4 is a side view showing the configuration of the anchor of this embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the anchor of this embodiment, is the side view (a) which shows an anchor main body, the front view (b) which shows the front-end|tip part of an anchor main body, and the side view (c) which shows a perforation sealing member. . It is explanatory drawing (a) (b) (c) regarding the construction procedure which installs an anchor. It is explanatory drawing (d), (e), and (f) regarding the construction procedure which installs an anchor. It is explanatory drawing (g) (h) regarding the construction procedure which installs an anchor. It is explanatory drawing (a) (b) regarding the modification of the construction procedure which installs an anchor.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, embodiment of the anchor which concerns on this invention, and an anchor construction method is described in detail. However, although various technically preferable limitations are attached to the embodiments described below in order to carry out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

For example, as shown in FIGS. An expanding member 30 and the like for expanding the 11 are provided.

The anchor body 10 is, for example, a stainless steel member having a substantially cylindrical shape, and includes a distal end portion 11 that is expanded while being inserted into a predetermined perforation, and a resin material injected from the rear end side of the distal end portion. A hollow portion 12 serving as a flow path for discharging from the 11 side, a rear end portion 13 having a male screw, and the like are provided.

The tip portion 11 of the anchor body 10 is provided with a slit 11a formed along the axis from the tip side, and the tip portion 11 is divided into four by the slit 11a.

The hollow portion 12 is a through hole formed along the axial center of the anchor body 10 and is formed so as to reach the slit 11 a of the tip portion 11 from the rear end side of the anchor body 10 .
The hollow portion 12 has a large-diameter portion 12a into which the expansion member 30 can enter and a small-diameter portion 12b that restricts the expansion member 30 from entering.
A large-diameter portion 12a of the hollow portion 12 is provided in a range from the rear end side of the anchor body 10 to the slit 11a.
The small-diameter portion 12b of the hollow portion 12 is provided at a portion where the slit 11a of the tip portion 11 of the anchor body 10 is formed.
That is, the expansion member 30 inserted into the hollow portion 12 from the rear end side of the anchor body 10 is restricted from entering at a position where it reaches the slit 11a of the anchor body 10 .

A nut N is screwed to the rear end portion 13 having a male screw, as will be described later.

Further, the anchor body 10 is provided with two sets of projections 14 that form a pair with the axis of the anchor body 10 interposed therebetween.
When the anchor body 10 is inserted into a predetermined bore, the four protrusions 14 come into contact with the bore wall of the bore, so that the anchor body 10 can be positioned toward the center of the bore.
The peripheral surface of the anchor main body 10 is formed with bellows-like projections and depressions so that the anchor body 10 can be easily fixed with a resin material, which will be described later.

The perforation sealing member 20 is attached to the distal end portion 11 of the anchor body 10 so as to be inserted into the perforation together with the anchor body 10, and when inserted into a predetermined perforation, the perforation sealing member 20 is in sliding contact with the hole wall of the perforation. is configured to
The perforation sealing member 20 is made of an elastically deformable material such as foamed polyethylene, and is formed in a cylindrical shape having a diameter larger than the diameter of the perforation.
If the perforation sealing member 20 having a size larger than the diameter of the perforation is elastically deformable, when the perforation sealing member 20 is inserted into the perforation, the perforation sealing member 20 is easily brought into close contact with the hole wall of the perforation, and is preferably in sliding contact. .
For example, when the diameter of a predetermined perforation is 12 mm, the perforation sealing member 20 made of foamed polyethylene was formed in a cylindrical shape with a diameter of 13 mm and a length of 20 mm.
(Here, the thickness (diameter) of the anchor body 10 is 10.2 mm, and the distance between the paired protrusions 14 across the axis is 12 mm. a 12 mm diameter bore hole is formed, where the anchor body 10 has a length of 180 mm, of which the rear end 13 has a length of 30 mm.)

The perforation sealing member 20 is packed deep into the perforation so as to be pushed by the distal end portion 11 of the anchor body 10 . If the perforation sealing member 20 having a size that slides on the wall of the perforation is stuffed into the perforation, even if there is a gap in the perforation, the end of the hole connected to the gap can be closed and the gap can be closed. The perforation space can be divided.

Further, the perforation sealing member 20 is provided with a core material 21 penetrating in the extending direction of the anchor body 10 . A needle member called an insect pin, for example, can be used for the core material 21 .
The end of the core material 21 protrudes through the perforation sealing member 20, and the perforation sealing member 20 is closed by inserting the end of the core material 21 into the slit 11a of the distal end portion 11 of the anchor body 10. It is attached to the distal end portion 11 of the anchor body 10 .
If the end of the core material 21 does not protrude from the hole sealing member 20, the hole sealing member 20 may be attached to the distal end portion 11 of the anchor body 10 with an adhesive or the like.

When the perforation sealing member 20 is pushed by the distal end portion 11 of the anchor body 10 and packed deep into the perforation, the perforation sealing member 20 is in slidable contact with the wall of the perforation. Although the posture is likely to be disturbed, if the perforation sealing member 20 is provided with the core material 21, the posture attached to the distal end portion 11 of the anchor body 10 can be maintained, and the substantially cylindrical shape is maintained. It becomes stuffed deep inside the perforation.

The spreading member 30 is, for example, a stainless steel member having a substantially bullet shape.
The distal end portion 11 of the anchor body 10 can be expanded by driving the expansion member 30 into the small diameter portion 12b of the hollow portion 12 using predetermined tools (a driving rod 3 and a hammer 4, which will be described later). can.

Next, a construction procedure for installing the anchor 100 of this embodiment on a wall surface will be described.
First, as shown in FIG. 3A, a drill D is used to form a predetermined perforation H (here, a perforation H having a diameter of 12 mm and a depth of 160 mm).
At this time, a marking M is attached to the drill D in order to form a hole H with a predetermined depth.

Next, as shown in FIG. 3(b), chips in the hole H formed by the drill D are blown off with a blower 1, or as shown in FIG. 3(c), a brush 2 is used to remove the chips. or
Such cleaning processing inside the perforations H may be repeated multiple times.
Also, a dust collector may be used to suck up the shavings in the perforations H.

Next, as shown in FIGS. 4(d) and 4(e), the attachment hole of the backing plate P attached to the wall surface W is aligned with the perforation H of the wall surface W, and the perforation sealing member 20 attached to the tip portion 11 is removed. The anchor body 10 is inserted into the hole H so as to be pushed deep into the hole H.
Then, with the hole sealing member 20 stuffed into the hole H, the nut N is screwed onto the rear end portion 13 of the anchor body 10 via the washer C to temporarily fix it.
When the anchor body 10 is inserted into the hole H, the hole sealing member 20 slides against the hole wall of the hole H and is packed deep into the hole H. The sealing member 20 can be removed so as to sweep deep into the perforation H.

Next, as shown in FIGS. 4(e) and 4(f), the expanding member 30 is inserted into the hollow portion 12 of the anchor body 10, and the driving rod 3 having approximately the same length as the anchor body 10 is used to push the expanding member 30. is struck against the small-diameter portion 12b of the hollow portion 12, and then the driving rod 3 is hit with a hammer 4 to drive the expansion member 30 into the small-diameter portion 12b of the hollow portion 12.例文帳に追加Alternatively, the expansion member 30 may be attached to the hollow portion 12 of the anchor body 10 in advance, and the expansion member 30 may be driven into the small-diameter portion 12b of the hollow portion 12 .
Then, the expanding member 30 driven into the small-diameter portion 12b of the hollow portion 12 of the anchor body 10 pushes and expands the distal end portion 11 of the anchor body 10, and the expanded distal end portion 11 is pushed into the hole wall of the perforation H. It is temporarily fixed by pressing it so that it bites into it.

Next, as shown in FIG. 5(g), a resin injector 5 is used to inject a resin material J into the hollow portion 12 from the rear end side of the anchor body 10, and the resin material J is injected from the slit opening on the distal end portion 11 side of the anchor body 10. The gap between the perforation H and the anchor body 10 is filled with the resin material J so that the discharged resin material J is filled from the inner side of the perforation H.
For example, it can be confirmed that the gap between the perforation H and the anchor body 10 is filled with the resin material J by leaking the resin material J from the gap of the C-shaped washer C.
Then, as shown in FIG. 5(h), the resin material J filled in the gap between the perforation H and the anchor body 10 is hardened and secondarily fixed, and the nut N is tightened to the rear end portion 13, thereby The installation work of the anchor 100 for attaching the backing plate P is completed.

As described above, with the anchor 100 of the present embodiment, the perforation sealing member 20 having a size that makes sliding contact with the hole wall of the perforation H can be packed into the perforation H. However, since the space connected to the gap can be closed, the gap between the hole H and the anchor body 10 can be satisfactorily filled with the resin material J that is filled from the inside of the hole H.
If the gap between the perforation H and the anchor body 10 can be satisfactorily filled with the resin material J in this manner, the anchor body 10 can be firmly fixed to the perforation H. Anchor 100 can be conveniently installed.

In other words, the anchor 100 of the present embodiment can be suitably installed even when there is a gap deep in the hole H. It can be suitably used as an anchor to be installed in a structure.
Of course, it can also be used as an anchor to be installed in a structure made of concrete or the like.

It should be noted that the present invention is not limited to the above embodiments.
For example, as shown in FIG. 6( a ), after the perforation sealing member 20 that is in sliding contact with the hole wall of the predetermined perforation H is packed into the perforation H using a rod-shaped member or the like longer than the depth of the perforation H, , as shown in FIG. 6(b), the anchor body 10 may be inserted into the bore H. After inserting the anchor body 10 into the hole H, the distal end portion 11 of the anchor body 10 is expanded, and the resin material J is filled through the hollow portion 12 .
Even with such a construction procedure, if there is a gap at the back of the perforation H, the space connected to the gap can be closed with the perforation sealing member 20, and the resin material J can fill the gap between the perforation H and the anchor body 10. can be filled well.
In other words, even if the puncture sealing member 20 is detached from the distal end portion 11 of the anchor body 10, or if the puncture sealing member 20 cannot be attached to the distal end portion 11 of the anchor body 10, the gap behind the perforation H The anchor 100 can be installed by closing the space connected to the hole with the perforation sealing member 20 .

In addition, the puncture sealing member 20 that has detached from the distal end portion 11 of the anchor body 10 or the puncture sealing member 20 that cannot be attached to the distal end portion 11 of the anchor body 10 is brought into contact with the distal end portion 11 of the anchor body 10. The anchor body 10 may be used to stuff the perforation sealing member 20 into the perforation H.

In the above embodiment, when the diameter of the perforation H is 12 mm, the perforation sealing member 20 made of an elastically deformable material has a diameter of 13 mm. Since the diameter of the perforation H is arbitrary, the perforation sealing member 20 having a size corresponding to the diameter of the perforation H may be used.
Of course, the perforation H corresponding to the thickness of the anchor body 10 may be formed, and the perforation sealing member 20 having a size corresponding to the diameter of the perforation H may be used.

In addition, it goes without saying that other specific details such as the structure can be changed as appropriate.

REFERENCE SIGNS LIST 10 anchor body 11 tip portion 11a slit 12 hollow portion 12a large diameter portion 12b small diameter portion 13 rear end portion 14 protrusion 20 perforation sealing member 21 core material 30 expansion member 100 anchor H perforation N nut C washer P backing plate W wall surface

Claims (6)

an anchor body having a tip portion that is expanded while being inserted into a predetermined perforation, and a hollow portion that serves as a flow path for discharging the resin material injected from the rear end side from the tip portion side;
a perforation sealing member attached to the distal end of the anchor body and inserted into the perforation together with the anchor body;
a spreading member for spreading the distal end portion of the anchor body inserted into the bore;
An anchor comprising
The perforation sealing member is configured to have a size such that when it is inserted into the perforation, it slides against the hole wall of the perforation. ,
An anchor, characterized in that it is constructed so as to block the end of a hole connected to a gap at the back of the hole . an anchor body having a tip portion that is expanded while being inserted into a predetermined perforation, and a hollow portion that serves as a flow path for discharging the resin material injected from the rear end side from the tip portion side;
a perforation sealing member attached to the distal end of the anchor body and inserted into the perforation together with the anchor body;
a spreading member for spreading the distal end portion of the anchor body inserted into the bore;
An anchor comprising
The anchor, wherein the perforation sealing member is sized to slide against a wall of the perforation when inserted into the perforation. 3. The anchor according to claim 1 , wherein the perforation sealing member is made of an elastically deformable material and has a cylindrical shape with a diameter larger than that of the perforation. The perforation sealing member is provided with a core material penetrating in the extending direction of the anchor body,
4. The core material according to any one of claims 1 to 3, wherein the core material is configured to maintain the posture of the perforation sealing member attached to the distal end of the anchor body. anchor. a first step of stuffing a perforation sealing member that is in sliding contact with a hole wall of a predetermined perforation into the depth of the perforation to close the end of the perforation that leads to the gap at the depth of the perforation ;
a second step of inserting into the perforations an anchor body having a hollow portion serving as a flow path for discharging the resin material injected from the rear end side from the front end side;
a third step of expanding the distal end portion of the anchor body inserted into the bore and pressing the expanded distal end portion against the hole wall of the bore;
a fourth step of filling a resin material into the perforations through the hollow portions;
An anchor construction method characterized by having When inserting the anchor body into the bore, the first step and the second step are performed simultaneously by bringing the bore sealing member into contact with the distal end portion of the anchor body and stuffing it into the bore. The anchor construction method according to claim 5 , characterized in that:

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