JP6462512B2 - Anchor head fixing member for anchor rust prevention and anchor head fixing structure thereof - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention provides an anchor head anchoring member for anchor rust prevention that can accurately and reliably fill grout around the anchor head of the anchor and can improve rust prevention performance against the anchor, and the anchor head thereof. It relates to the fixing structure.

  Patent Documents 1 and 2 are known as techniques for providing an anchor such as a lock bolt in an anchor installation hole at an anchor installation location. The “anchor mounting washer” of Patent Document 1 is such that a concrete support constructed for slope protection reduces the protruding height of the entire structure fixing the anchor head when the anchor is provided, and With the aim of improving workability, the opening of the anchor mounting hole in the concrete support formed on the slope has a height corresponding to the total height of the nut with a ball seat that is screwed to the head of the anchor. A body part having an inner peripheral surface inclined and having a bottom part as a seat part of a nut body with a ball seat, and a saddle plate part that is provided around the upper and lower intermediate positions of the body part to perform the pressing function of the concrete support. The provided anchor mounting washer is used, and the height of the anchor head fixing structure as a whole is lowered by setting the ball seated nut body as a position submerged from the surface of the concrete support.

  The “anchor mounting device” of Patent Document 2 is capable of preventing the head of the anchor and the rust prevention cap from being damaged by falling rocks, etc. In the anchor mounting apparatus for fixing the head of the bearing plate to the bearing plate, a large diameter hole is formed around the head of the anchor of the bearing plate, and the fixing member for fixing on the surface of the large diameter hole of the bearing plate is a large diameter hole. The fixing member and the head of the anchor are fixed in the large-diameter hole.

JP 2012-246703 A JP 2000-178969 A

  This type of anchor is used to stabilize the slope (slope). As a rust prevention technique for the anchor end (head) of the anchor, a cap that covers the anchor end is provided, and grease is filled in the cap to rust the anchor end. However, in general, since the cap protrudes greatly from the slope, there is a concern that the cap may be damaged by falling rocks or the like.

  Examining Patent Document 1 from the viewpoint of rust prevention, an anchor mounting washer having a body portion and a heel portion having an inner peripheral surface as an inclined surface or a hook-like surface is inserted into the head portion of the anchor, and the head portion of the anchor A nut body with a ball seat that is screwed onto the washer is fastened to the washer, and a rust prevention cap that covers the anchor head is fitted into the washer.

  In the installation procedure of the anchor mounting washer, the anchor is inserted into the drilling hole, cement is injected into the drilling hole, then the washer is mounted on the head of the anchor, and the anchor is first positioned. After the cement has hardened, remove the washer from the anchor head, and in the drilling hole, inject mortar material around the anchor head protruding from the cement, and before the mortar material hardens, reattach the washer to the anchor head. Attach to the part.

  As described above, since the anchor is constructed on the slope, the drilling hole into which the anchor is inserted is formed in an oblique direction in which the cement injected into the inside leaks without becoming full. In order to fill the space where the cement leaks and becomes empty, it is necessary to inject a mortar material around the anchor head of the anchor.

  In order to inject mortar into the drilling hole, the washer attached to the head of the anchor must be removed once in order to locate the anchor, mortar must be injected, and then the washer must be attached again to prevent rust. Workability for securing was not good.

  In addition, in the case of a mortar material having fluidity, a mortar material that is kneaded is used because it leaks one after another from the hole as well as cement and cannot be fully injected into the hole. Since the hardened mortar material is manually filled in the hole, it is easy for air to accumulate in the hole, and as a result, it is difficult to obtain a reliable rust prevention effect.

  In addition, performing the above rust prevention work on a large number of anchors is very laborious and has poor workability. Eventually, neither the device for rust prevention of the anchor nor the rust prevention structure was sufficient.

  Patent Document 2 can adopt other drilling (inserting an anchor into a pre-drilled drilling hole) and self drilling (forming a drilling hole with the anchor itself) as a construction procedure.

  In other drilling, the grout is filled from the drilling hole into the large-diameter hole, and the anchor is inserted into the drilling hole with the fixing member, nut and washer attached thereto.

  In other drilling, in the same manner as in Patent Document 1, it is necessary to remove the fixing member, for example, to add additional grout of the kneading, and then to attach the fixing member again, in connection with constructing the anchor on the slope. The rust-proofing construction has the same problem as that of Patent Document 1, and the rust-proofing device and the rust-proofing structure are insufficient.

  In self-drilling, drilling using a hollow rod-shaped anchor, then attaching a fixing member, nut and washer to the anchor head, and then from the grout injection hose connected to the anchor head, through the hollow part of the anchor, The grout is filled into the hole and the large diameter hole. The filled grout is discharged from the groove portion of the flange portion through the gap between the large-diameter hole portion and the fixing member, whereby the grout is filled around the head portion of the anchor.

  However, the grout tends to settle with hardening, thereby creating voids around the anchor head. It was difficult to secure sufficient and reliable rust prevention because the voids could not be filled later with a grout.

  Assuming that the groove is used to fill the grout, the washer installed on the slope blocks the groove of the fixing member due to the structure, and eventually the grout is refilled to prevent rust. It was difficult to guarantee. Therefore, it has been difficult to ensure a sufficient rust-proofing effect regardless of whether it is constructed by self-drilling, as an apparatus, or as a structure.

  The present invention was devised in view of the above-described conventional problems, and is capable of accurately and surely filling the grout around the anchor head of the anchor and improving the rust prevention performance against the anchor. An object of the present invention is to provide an anchor head fixing member for rust prevention and an anchor head fixing structure thereof.

  The anchor head anchoring member for anchor rust prevention according to the present invention has a hollow cylindrical body inserted into an anchor installation hole at an anchor installation location, and the hollow cylindrical body has an anchor inside the anchor installation hole. In order to fix the anchor head portion of the anchor exposed from the grout material to be fixed to the anchor installation position, the anchor head portion has an accommodating portion for accommodating the anchor head portion, and the anchor installation hole inward side. The lower end portion facing the grout material is engaged with a nut body screwed to the anchor head portion, and the upper end portion is engaged with the anchor installation location on the outer side of the anchor installation hole. An anchor head fixing member, which is formed by extending outward at the upper end portion of the hollow cylindrical body, and is provided around the anchor installation hole, and the flange portion and the hollow cylindrical body Between the above An injection for filling the filler in the filling space between the hollow cylindrical body and the grout material formed in the anchor installation hole and penetrating the flange portion with the car head interposed therebetween An outer surface of the hollow cylindrical body is recessed from the hole and the discharge hole, and is formed from the flange portion toward the lower end side of the hollow cylindrical body, and communicates with the injection hole and the discharge hole, respectively. In addition, an injection groove and a discharge groove communicated with the filling space, and a lid body that is detachably provided in the hollow cylindrical body, closes the injection hole and the discharge hole, and seals the housing portion. It is characterized by that.

  The flange portion has an annular groove that connects the injection hole and the discharge hole to each other along a circumferential direction thereof, and the annular groove is closed by the lid body, and the annular filling portion of the filler It is characterized by forming.

  The anchor head fixing structure for anchor rust prevention according to the present invention uses the anchor head fixing member for anchor rust prevention to fix the anchor head of the anchor at the anchor installation location, and the filler. It is characterized by being filled with a foam material.

  In the anchor head fixing member for anchor rust prevention and the anchor head fixing structure thereof according to the present invention, the grout can be filled accurately and surely around the anchor head of the anchor, and the rust prevention performance against the anchor Can be improved.

1 is a side sectional view of a hollow cylindrical body showing a preferred embodiment of an anchor head fixing member for anchor rust prevention according to the present invention. It is a top view of the hollow cylindrical body shown in FIG. It is explanatory drawing for demonstrating the cover body provided in the hollow cylindrical body shown in FIG. 1, Comprising: FIG. 3 (A) is a side view of a cover body, FIG.3 (B) is a latching of a cover body. It is an expanded view of a cylinder part. It is explanatory drawing for demonstrating the effect | action of the anchor head fixing member for anchor rust prevention which concerns on this invention, and an anchor head fixing structure, Comprising: The construction construction which shows a mode that a hollow cylindrical body is inserted in an anchor installation hole It is side sectional drawing of a 1 step | paragraph. FIG. 5 is a side sectional view of a construction second stage showing a state where the hollow cylindrical body is installed at the anchor installation location following FIG. 4. FIG. 6 is a side sectional view of a third stage of construction showing a state where the anchor head of the anchor is fixed to the anchor installation location with a nut body, following FIG. 5. FIG. 7 is a side cross-sectional view of the fourth stage of construction showing a state where the filler is filled into the filling space between the hollow cylindrical body and the grout material following FIG. 6. FIG. 8 is a side sectional view of a fifth stage of construction showing a state where the filling of the filler is completed and the lid is attached to the hollow cylindrical body following FIG. 7. FIG. 9 is a side sectional view of the sixth stage of construction showing a state where the anchor head fixing structure for anchor rust prevention is completed following FIG. 8.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of an anchor head fixing member and an anchor head fixing structure for anchor rust prevention according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a lock bolt is illustrated as an anchor and will be described below. The anchor is not limited to a rock bolt, and may be a ground anchor such as a PC steel wire or a stranded wire made of PC steel wire.

  As shown in FIGS. 1, 2, and 9, a bolt installation hole 3 is formed in a lock bolt installation location 2 where an anchor, for example, a lock bolt 1 is installed to reinforce the ground surface or the like. In the illustrated example, the lock bolt installation location 2 is shown as a horizontal plane, but in the case of a slope, it is an inclined plane.

  The bolt installation hole 3 is often provided at a substantially right angle to the surface of the lock bolt installation location 2. Of course, it does not have to be a right angle. The bolt installation hole 3 may be formed by any other drilling method or self-drilling method. In the illustrated example, a solid shaft-like lock bolt 1 of another perforation type is shown. In the case of the self-drilling method, a hollow shaft-shaped lock bolt having an axial through portion for injecting grout material may be used.

  The bolt installation hole 3 is cut along the length direction of the lock bolt 1. The lock bolt 1 is inserted into the bolt installation hole 3 along its length direction.

  In order to fix the inserted lock bolt 1 in the bolt installation hole 3, a grout material 4 such as cement or mortar is filled in the bolt installation hole 3. The grout material 4 is provided inside the bolt installation hole 3 up to a depth position below the installation position of the hollow cylindrical body 5 described later. Therefore, most of the lock bolt 1 is embedded in the grout material 4 inside the bolt installation hole 3, while its bolt head 1 b is exposed upward from the grout material 4.

  When the lock bolt installation location 2 is an inclined surface and the bolt installation hole 3 is formed obliquely with respect to the direction of gravity, the grout material 4 cannot completely fill the bolt installation hole 3, and naturally The bolt head 1 b of the lock bolt 1 is exposed upward from the grout material 4.

  The bolt head fixing member 6 of the lock bolt according to the present embodiment is provided in the bolt installation hole 3 of the lock bolt installation location 2 configured as described above (see FIG. 9). The bolt head fixing member 6 mainly includes a hollow cylindrical body 5 having an upper opening 5a and a lower opening 5b, and is detachably provided on the upper part of the hollow cylindrical body 5 so as to cover the upper opening 5a. And a lid 7.

  An annular flange portion 8 is formed on the upper end portion of the hollow cylindrical body 5 by extending it outward. The hollow cylindrical body 5 is inserted into the bolt installation hole 3 from the opening of the bolt installation hole 3 toward the inside. The upper end portion of the hollow cylindrical body 5 having the upper opening 5 a is projected outward of the bolt installation hole 3 including the flange portion 8.

  The lower end portion of the hollow cylindrical body 5 having the lower opening 5b is positioned on the inner side of the bolt installation hole 3 so as to face the grout material 4 from above. The lower end portion of the hollow cylindrical body 5 may face the grout material 4 by being embedded in the grout material 4.

  The inner space inside the hollow cylindrical body 5 forms an accommodating portion 5c for accommodating the bolt head 1b of the lock bolt 1, and when the hollow cylindrical body 5 is inserted into the bolt installation hole 3, the grout material The bolt head 1b exposed from 4 is accommodated by being inserted into the accommodating portion 5c of the hollow cylindrical body 5 from the lower opening 5b. Inside the hollow cylindrical body accommodating portion 5c, a nut body 9 is screwed onto the bolt head 1b, and this nut body 9 is engaged with the lower end portion of the hollow cylindrical body 5 (around the lower opening 5b). .

  The flange 8 at the upper end of the hollow cylindrical body 5 is seated on a washer 10 provided on the lock bolt installation location 2, whereby the upper end of the hollow cylindrical body 5 is installed with a lock bolt via the washer 10. Engage with point 2. Therefore, the hollow cylindrical body 5 is pressed toward the inner side of the bolt installation hole 3 by the action of the screwing fastening force of the nut body 9 to the bolt head 1b, whereby the flange portion 8 at the upper end portion is pressed. The lock bolt 1 is pressed against the surface of the lock bolt installation location 2 so that the lock bolt 1 is fixed to the lock bolt installation location 2, whereby the force acting on the lock bolt installation location 2 is transmitted to and supported by the lock bolt 1. The

  In detail, the hollow cylindrical body 5 has an inner peripheral surface on the upper opening 5a side on which a locking cylinder portion 11 of the lid 7 to be described later is locked, formed as a cylindrical surface, and on the lower opening 5b side. Regardless of the installation angle of the lock bolt 1, the inner peripheral surface is in contact with the ball seat of the nut body 9 with a ball seat and is engaged with each other in a semi-spherical, bowl-like or bowl-like smooth manner. Formed with a three-dimensional curved surface. The outer peripheral surface of the hollow cylindrical body 5 is formed along the inner peripheral surface form.

  In addition, in this embodiment, although the nut body 9 with a ball seat is illustrated and demonstrated, a nut without a ball seat may be sufficient. Moreover, the outer peripheral surface of the hollow cylindrical body 5 may not be formed along the inner peripheral surface form.

  The outer peripheral surface on the upper opening 5 a side of the hollow cylindrical body 5 faces the inner peripheral surface of the bolt installation hole 3, and the outer peripheral surface on the lower opening 5 b side of the hollow cylindrical body 5 is on the upper surface of the grout material 4. Face. Accordingly, a filling space S of the filler 12 described later is formed inside the bolt installation hole 3 between the grout material 4 and the hollow cylindrical body 5.

  In the illustrated example, the upper end portion of the hollow cylindrical body 5 has an outer diameter dimension of the flange portion 8 smaller than the inner diameter of the bolt installation hole 3, and the annular washer 10 provided around the opening of the bolt installation hole 3. In this case, the flange 8 is formed larger than the bolt installation hole 3 so that the lock bolt is used without using the washer 10. You may make it engage with the installation location 2. FIG.

  The flange portion 8 extends vertically between the flange portion 8 and the hollow cylindrical body 5 so as to pass through the flange portion 8 and fill the space between the hollow cylindrical body 5 and the grout material 4 inside the bolt installation hole 3. An injection hole 13 and a discharge hole 14 for filling S with the filler 12 are formed. The injection hole 13 and the discharge hole 14 are arranged so as to sandwich the bolt head 1b therebetween, that is, at positions opposite to each other with the bolt head 1b interposed therebetween, specifically, relative to each other in the diameter direction of the flange portion 8. Provided. Therefore, it can be confirmed that the filler 12 has spread to every corner of the filling space S.

  The filler 12 is injected into the injection hole 13 from the outside of the bolt installation hole 3, and the injected filler 12 flows into the filling space S. From the discharge hole 14, the overflowing filler 12 is discharged from the filling space S inside the bolt installation hole 3 together with the air inside. The injection hole 13 and the discharge hole 14 are formed from the outer surface of the hollow cylindrical body 5 from the flange portion 8 to the thick portion of the hollow cylindrical body 5 due to the formation position of the injection groove 15 and the discharge groove 16 described later. It is formed so as to partially bite.

  In other words, the injection hole 13 and the discharge hole 14 are formed from the upper side to the lower side across the flange portion 8 and the hollow cylindrical body 5, and the lower ends thereof are formed so as to reach the lower surface of the flange portion 8. .

  The hollow cylindrical body 5 is formed with an injection groove 15 and a discharge groove 16 that communicate with the injection hole 13 and the discharge hole 14, respectively. Both the injection groove 15 and the discharge groove 16 are formed by recessing the outer surface of the hollow cylindrical body 5, that is, by biting into the thick part of the hollow cylindrical body 5. The injection groove 15 and the discharge groove 16 are formed with a length connecting the filling space S and the injection hole 13 and the discharge hole 14 of the flange portion 8.

  Specifically, the injection groove 15 and the discharge groove 16 have a length that reaches the filling space S from the bottom of the flange portion 8 toward the lower end portion of the hollow tubular body 5. It is formed with a length exceeding 10 and reaching the filling space S.

  Since the injection groove 15 and the discharge groove 16 are formed by recessing the outer surface of the hollow cylindrical body 5, even if the outer surface of the hollow cylindrical body 5 is in contact with the inner surface of the bolt installation hole 3, or an annular washer Even if it contacts the inner surface (bolt insertion hole) 10, the injection hole 13 and the discharge hole 14 are always communicated with the filling space S without being blocked by the inner surface (bolt insertion hole). 14 is secured.

  As shown in FIGS. 3 and 9, the lid body 7 includes a lid portion 17 that covers the housing portion 5 c of the hollow cylindrical body 5 and abuts on the upper surface of the flange portion 8 from above, and a lower portion from the lid portion 17. A cylindrical locking cylinder portion 11 is formed to be hung down, inserted into the upper opening 5a of the hollow cylindrical body 5 and locked to the inner peripheral surface on the upper opening 5a side. . The lid body 7 covers the housing portion 5 c to conceal the bolt head portion 1 b and the nut body 9 from the outside of the hollow cylindrical body 5.

  An annular groove 18 that connects the injection hole 13 and the discharge hole 14 to each other is formed along the circumferential direction on the upper surface of the flange portion 8 that covers the lid portion 17 (see FIGS. 1 and 2). When the lid portion 17 of the lid body 7 is brought into contact with the upper surface of the flange portion 8, the annular groove 18 is sealed and the annular groove 18 is formed as an annular filling portion 19 (see FIG. 9).

  As will be described later, when a foam material such as urethane foam is used as the filler 12, the foam material that fills the filling space S and increases its volume is directed from the injection hole 13 and the discharge hole 14 toward the upper surface of the flange portion 8. Since the overflowing and overflowing foamable filler 12 flows through the annular groove 18, the annular groove 18 is closed by the lid portion 17, so that the annular groove 18 is filled with the filler 12. 19 Of course, it is not limited to overflow, and the filler 12 may be poured into the annular groove 18.

  Of course, it is not limited to the foam material, and even the filler 12 having no foaming property is filled until the filler 12 filled in the filling space S overflows from the injection hole 13 and the discharge hole 14, and further annular If the groove 12 is filled with the filler 12, the lid body 7 is attached to the hollow cylindrical body 5, thereby ensuring a considerable watertight effect and ensuring a rust prevention effect.

  A plurality of locking projections 20 are formed at equal intervals in the circumferential direction on the cylindrical inner peripheral surface of the hollow cylindrical body 5 on the upper opening 5a side.

  The locking cylinder portion 11 of the lid body 7 is provided with a rubber ring 21 for sealing that is positioned directly below the lid portion 17, and is positioned below the rubber ring 21, so that the circumferential direction of the locking cylinder portion 11 is provided. A plurality of helical locking grooves 22 that are detachably locked to the respective locking projections 20 are formed along. When the lid 7 is attached to the hollow cylindrical body 5, the rubber ring 21 is pressed against the inner peripheral surface on the upper opening 5 a side above the locking projection 20.

  In the illustrated example, three locking projections 20 are formed at a pitch of 120 °, and three locking grooves 22 are formed at the same pitch as the locking projections 20.

  The locking groove 22 extends from the start end portion 22a opened downward to the lower end of the locking cylinder portion 11 to the end portion 22b toward the middle portion in the vertical direction of the locking cylinder portion 11 on the half circumference of the locking cylinder portion 11. The length is less than that (see FIG. 3B). The locking groove 22 is formed with a groove width capable of locking the locking protrusion 20 except for the starting end portion 22 a, and the starting end portion 22 a is formed with a large and wide groove width in the circumferential direction of the locking cylinder portion 11.

  When the lid body 7 is attached to the hollow cylindrical body 5, the locking projection 20 smoothly enters the start end portion 22 a of the locking groove 22 without being almost aligned, and then the locking projection is turned by turning the lid body 7. 20 moves toward the inner depth of the locking groove 22 and is locked to the locking groove 22, whereby the lid body 7 is quickly and liquid-tightly attached to the hollow cylindrical body 5 with a short rotation stroke. be able to.

  Next, the bolt head fixing structure for lock bolt rust prevention according to the present embodiment will be described in accordance with a construction procedure. First, as shown in FIG. 4, the bolt installation hole 3 is formed in the lock bolt installation location 2, and the grout material 4 is injected into the bolt installation hole 3 and the lock bolt 1 is inserted and installed. Moreover, the hollow cylindrical body 5 and the washer 10 are prepared.

  Next, as shown in FIG. 5, the washer 10 is installed at the lock bolt installation location 2, and the hollow cylindrical body 5 is inserted into the bolt installation hole 3 to expose the bolt head 1 b exposed from the grout material 4. Is inserted into the accommodating portion 5c through the lower opening 5b. At this time, the hollow cylindrical body 5 is supported inside the bolt installation hole 3 by the flange portion 8 being engaged with the lock bolt installation location 2 via the washer 10.

  Next, when the grout material 4 is hardened and the lock bolt 1 is fixed inside the bolt installation hole 3, the nut body 9 is screwed into the bolt head 1b as shown in FIG. The hollow cylindrical body 5 is pressed downward with a combined fastening force. Due to the screwing and fastening action of the nut body 9, the flange portion 8 of the hollow cylindrical body 5 is pressed against the lock bolt installation location 2, whereby the lock bolt 1 is fixed to the lock bolt installation location 2.

  Next, as shown in FIG. 7, the filler 12 is filled into the filling space S through the injection groove 15 from the injection hole 13 of the hollow cylindrical body 5. The filler 12 that fills and overflows the filling space S is discharged from the discharge hole 14 through the discharge groove 16 while pushing out air. Thereby, the filler 12 with high fluidity is filled, and the filler 12 can be fully filled in the filling space S between the grout material 4 and the hollow cylindrical body 5 by a single filling operation. .

  In the illustrated example, the lock bolt installation location 2 is a horizontal plane, but the same applies to the case of an inclined surface. In the case of an inclined surface, the injection hole 13 is positioned below the inclined surface, and the discharge hole 14 is positioned above the inclined surface.

  Thereby, first, the rust prevention performance between the hollow cylindrical body 5 and the grout material 4 around the bolt head 1 b inside the bolt installation hole 3 is ensured up to the height position of the flange portion 8. At this time, the filler 12 is filled up to the annular groove 18. Further, as the filler 12, it is desirable to use a foam material whose volume increases after filling.

  Next, as shown in FIGS. 8 and 9, the lid body 7 is prepared, and the locking projections 20 are locked to the locking projections 20 so as to be screwed into the hollow cylindrical body 5. Thus, the hollow cylindrical body 5 is hermetically sealed. That is, the housing part 5c is sealed with the lid part 17, and the injection hole 13 and the discharge hole 14 of the flange part 8 are closed.

  Thereby, the antirust performance with respect to the flange part 8 upper direction is ensured. When closing the injection hole 13 and the like, the annular groove 18 is also closed. Since the closed annular groove 18, that is, the annular filling portion 19 is filled with the filler 12, particularly the foaming material, the rust prevention performance can be further enhanced.

  According to the bolt head fixing member 6 for locking bolt rust prevention and the bolt head fixing structure according to the present embodiment described above, the hollow cylindrical body 5 inserted into the bolt installation hole 3 of the lock bolt installation location 2. The hollow cylindrical body 5 is used for fixing the bolt head 1b of the lock bolt 1 exposed from the grout material 4 for fixing the lock bolt 1 in the bolt installation hole 3 to the lock bolt installation location 2. A nut body 9 having a receiving portion 5c for receiving the bolt head 1b on its inner side and a lower end facing the grout material 4 on the inner side of the bolt installation hole 3 screwed to the bolt head 1b. The bolt head fixing member 6 of the lock bolt 1 is engaged with the lock bolt installation location 2 on the outer side of the bolt installation hole 3, and is connected to the upper end of the hollow cylindrical body 5. Formed by expanding outward, 3 bolt mounting holes Are formed through the flange portion 8 in such a manner that the bolt head portion 1b is sandwiched between the flange portion 8 provided between the flange portion 8 and the hollow cylindrical body 5 through the washer 10. 3 The injection hole 13 and the discharge hole 14 for filling the filler 12 into the filling space S between the hollow cylindrical body 5 and the grout material 4 inside, and the hollow cylindrical body 5 with its outer surface recessed. The injection groove 15 and the discharge formed from the flange 8 over the washer 10 toward the lower end of the hollow cylindrical body 5 and communicated with the filling hole 13 and the discharge hole 14 and with the filling space S, respectively. The bolt head fixing member 6 includes a groove 16 and a lid 7 that is detachably provided in the hollow cylindrical body 5, closes the injection hole 13 and the discharge hole 14, and seals the accommodating portion 5 c. The bolt head 1b of the lock bolt 1 is used Since it is fixed to the lock bolt installation location 2, once the hollow cylindrical body 5 is attached to the lock bolt 1, it is not necessary to remove it, and the filling body 12 can be filled with the lid body 7 once. The filler 12 can be accurately and surely filled into the filling space S including the mounting portion with the hollow cylindrical body 5, that is, around the bolt head 1b of the lock bolt 1 inside the bolt installation hole 3. 1 can be drastically improved.

  If the lock bolt installation location 2 is an inclined surface, there may be a location where the washer 10 is in close contact with the outer surface of the hollow cylindrical body 5, but the injection hole 13, the discharge hole 14, and the injection groove 15 according to the present embodiment. In addition, the discharge groove 16 is not blocked, and the filling space S can be appropriately filled with the filler 12.

  The flange portion 8 has an annular groove 18 that connects the injection hole 13 and the discharge hole 14 to each other along the circumferential direction thereof. The annular groove 18 is closed by the lid body 7, and the annular filling of the filler 12 is performed. Since the portion 19 is formed, by filling the annular groove 18 or the annular filling portion 19 with the filler 12 when the lid body 7 is attached, the filler 12 is filled into the annular groove 18 following the filling of the filling space S. Rust prevention performance can be further improved only by continuous work of filling. Further, since the annular filling portion 19 filled with the filler 12 is provided, the watertight performance at the joint portion between the flange portion 8 and the lid body 7 can be improved.

  By using the bolt head fixing member 6 for lock bolt rust prevention described above and filling the foam material as the filler 12, not only can the filling space S be sufficiently filled using the foaming action. The filling material 12 can be filled in the annular filling portion 19 formed by the attachment of the lid body 7, and high rust prevention performance can be reasonably ensured.

  In addition, before attaching the cover body 7 to the accommodating part 5c, you may make it fill with rust preventive materials, such as grease, and raise the rust prevention of the bolt head 1b further.

DESCRIPTION OF SYMBOLS 1 Lock bolt 1b Bolt head 2 Lock bolt installation location 3 Bolt installation hole 4 Grout material 5 Hollow cylindrical body 5c Housing part 6 Bolt head fixing member for lock bolt rust prevention 7 Lid body 8 Flange part 9 Nut body 12 Filling Material 13 Injection hole 14 Discharge hole 15 Injection groove 16 Discharge groove 18 Annular groove 19 Annular filling part S Filling space

Claims (3)

The hollow cylindrical body inserted into the anchor installation hole at the anchor installation location, the hollow cylindrical body, the anchor head of the anchor exposed from the grout material that fixes the anchor inside the anchor installation hole, In order to fix to the anchor installation location, the anchor head has an accommodating portion for accommodating the anchor head, and a lower end portion facing the grout material on the inner side of the anchor installation hole is provided on the anchor head. An anchor head anchoring member of an anchor that is engaged with a screwed nut body and whose upper end is engaged with the anchor installation position on the outer side of the anchor installation hole,
A flange portion formed to extend outward at the upper end portion of the hollow cylindrical body, and provided around the anchor installation hole;
Between the flange portion and the hollow cylindrical body, the flange portion is formed so as to penetrate the anchor head portion, and the hollow cylindrical body and the grout material inside the anchor installation hole are formed. An injection hole and a discharge hole for filling the filling space between
An outer surface of the hollow cylindrical body is recessed, formed from the flange portion toward the lower end side of the hollow cylindrical body, communicated with the injection hole and the discharge hole, and communicated with the filling space. An injection groove and a discharge groove,
Anchor head anchoring for anchor rust prevention, comprising: a lid body that is detachably provided on the hollow cylindrical body, closes the injection hole and the discharge hole, and seals the housing portion. Element.   The flange portion has an annular groove that connects the injection hole and the discharge hole to each other along a circumferential direction thereof, and the annular groove is closed by the lid body, and the annular filling portion of the filler The anchor head fixing member for anchor rust prevention according to claim 1, wherein:   The anchor head fixing member for anchor rust prevention according to claim 1 or 2, wherein the anchor head of the anchor is fixed to the anchor installation location, and a foam material is filled as the filler. Anchor head anchoring structure for anti-rust anchor.

Images