JP2004251117A - Injection nozzle, resin injector and pinning work method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection nozzle, a resin injector and a pinning work method that appropriately injects resin, inserts anchor pins, and repairs the external walls of buildings in a simplified way. <P>SOLUTION: In an injection nozzle 12 for injecting adhesive resin materials into a hole 7 formed penetrating finishing materials 3 of a building wall 2 and extending to a predetermined depth thereof, the injection nozzle 12 is provided with a discharge port 22 at its end, a nozzle 15 inserted into the hole 7, and an adjustment seal 16 mounted at an external circumference of the nozzle 15 near its base that comes into contact with and seals the opening of the hole 7. The adjustment seal 16 is structured to be adjustable in axial length at the nozzle base area to adjust the length of the nozzle 15 inserted into the hole 7 so that the nozzle discharge port 22 may reach the bottom of the hole 7. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to an injection nozzle, a resin injector, and a pinning method used for repairing (pinning) an outer wall surface of a building.

  By the way, the pinning method repairs an outer wall composed of a skeleton and a finishing material, and is performed in order to prevent peeling and peeling of the finishing material from the skeleton caused by a gap between the skeleton and the finishing material generated over time. Construction of the outer wall. Conventionally, this type of pinning method uses a drill or the like to form an insertion hole by piercing an outer wall made of a frame and a finishing material, and inserting an injection nozzle of a resin injector into the insertion hole to form an adhesive system. After the resin is injected, the anchor pin is inserted, and after the resin is cured for about 24 hours, the resin dripping or overflowing from the insertion hole opening that occurs when the resin is injected and when the anchor pin is inserted is processed. Then, the surface is treated with putty or the like, and the coating treatment is performed to finish. In this case, the injection nozzle is formed in a tapered shape from the base side toward the distal end portion having the discharge port, and injects the resin in a state in which the insertion hole opening is sealed using the tapered portion. is there. In addition, all screw pins are used as anchor pins.

  In the resin injector used in such a conventional pinning method, since the injection nozzle is tapered, the tip of the injection nozzle does not reach the bottom of the insertion hole and the vicinity of the opening depends on the amount of the insertion hole. It can only be injected from the ground. For this reason, the resin is not properly injected into the bottom of the insertion hole, and a gap is formed in the bottom of the insertion hole.When the injection nozzle is removed from the insertion hole after the resin is injected, the resin is injected by the compressed air in this gap. The resin overflows from the opening of the insertion hole, which requires wiping the opening of the insertion hole. In addition, when the anchor pin is inserted into the insertion hole, the resin overflows further, so even if the resin is wiped off, repairing with putty and surface painting etc. are performed afterwards to impair the aesthetic appearance of the opening. In need of.

  Further, since the resin is not properly injected into the bottom portion of the insertion hole, even when the anchor pin is inserted, the resin is not adhered to the bottom portion even when the anchor pin is inserted, so that a sufficient pinning design strength cannot be obtained. In addition, in the pinning method using a resin injector having the above-described injection nozzle or an anchor pin, it is necessary to go through a large number of construction steps in order to pin one hole, which is inefficient. It has become.

  An object of the present invention is to provide an injection nozzle, a resin injector, and a pinning method that can appropriately perform resin injection and insertion of an anchor pin, and that simplify repair work on a building outer wall surface.

  The injection nozzle of the present invention is an injection nozzle that injects an adhesive resin into an insertion hole formed by penetrating a finishing material and piercing a skeleton to a predetermined depth. A nozzle to be inserted into the insertion hole, and an adjustment seal mounted on the outer peripheral surface of the base side of the nozzle, abutting against the opening of the insertion hole and sealing the same, and the adjustment seal is provided on the base side thereof. By adjusting the length in the axial direction, the length of insertion of the nozzle into the insertion hole can be adjusted so that the discharge port reaches the bottom of the insertion hole.

  According to this configuration, the adjustment seal attached to the nozzle, when the opening of the insertion hole is sealed, the insertion length of the nozzle into the insertion hole, the discharge port is located at the bottom of the insertion hole. Adjust to reach. This makes it possible to inject the resin from the bottom of the insertion hole with the opening of the insertion hole sealed. For this reason, it is possible to prevent the resin from overflowing from the insertion hole at the time of injection, and it is possible to inject an appropriate amount of resin without causing a gap at the bottom. The frame is concrete or wooden, and the finishing material is mortar, tile, stone, or the like. Further, it is preferable to use an epoxy resin as the resin.

  In this case, the adjustment seal is configured to be adjustable by cutting the base side, and it is preferable that the adjustment seal is formed with a plurality of cutting instruction lines describing the depth of the insertion hole. .

  Similarly, the adjustment seal is preferably divided into a plurality of pieces.

  A resin injector according to the present invention includes the above-described injection nozzle and an injector body to which the injection nozzle is detachably mounted.

  The pinning method of the present invention is a pinning method for repairing an outer wall composed of a skeleton and a finishing material by using the above-described resin injector, wherein the insertion hole is formed by piercing the finishing material and piercing the skeleton to a predetermined depth. A resin injection step of injecting resin from the bottom of the insertion hole with the insertion hole sealed by a resin injector, and a finishing material inserted into the insertion hole into which the resin has been injected. And a pin inserting step of inserting an anchor pin for anchoring the anchor.

  ADVANTAGE OF THE INVENTION According to the injection nozzle of this invention and the resin injection device provided with this, in the state which prevented the resin overflow from the insertion hole opening part by the adjustment seal, and by adjusting the insertion length of a nozzle by an adjustment seal. The resin can be injected from the bottom of the insertion hole. Therefore, it is possible to appropriately inject the resin into the insertion hole without forming a gap at the bottom of the insertion hole, and to omit the resin wiping operation. In addition, the amount of resin injected can be adjusted, and resources can be used effectively.

  According to the pinning method of the present invention, since the adjustment seal attached to the nozzle is configured to be adjustable, the resin is inserted from the bottom of the insertion hole while the opening of the insertion hole is sealed with the adjustment seal. Can be injected, the anchor pin can be properly inserted, and sufficient pinning strength can be obtained.

  Hereinafter, an injection nozzle according to an embodiment of the present invention, a resin injector including the same, and an anchor pin will be described with reference to the accompanying drawings, and a pinning method using them will be described. This injection nozzle is for injecting a resin into an insertion hole formed by penetrating a finishing material and piercing a skeleton to a predetermined depth, and capable of injecting a resin from a bottom portion of the insertion hole. It is. The resin injector is provided with the injection nozzle detachably. Further, the anchor pin is inserted into the insertion hole into which the resin has been injected. Furthermore, this pinning method uses the resin injector and the anchor pin to simplify the repair work on the outer wall.

  FIG. 1 is a schematic diagram in which a resin injector is used for an outer wall. The outer wall 1 is composed of a concrete skeleton 2 as a base thereof and a finishing material 3 provided on the outer surface of the concrete skeleton 2 with a predetermined thickness. The finishing material 3 is made of a mortar layer 4 having an adhesive function, a tile 5 attached to the mortar layer 4, a stone, or the like, and decorates and protects the surface of the concrete skeleton 2. Generally, the outer wall 1 peels off at the interface between the concrete skeleton 2 and the finishing material 3 with the passage of time, and a gap 6 is generated. FIG. 1A shows that the finishing material 3 is composed only of the mortar layer 4, and FIG. 1B is that the finishing material 3 is composed of the mortar layer 4 and the tile 5 in order from the concrete skeleton 2 side, and the tile 5 is FIG. 3 shows a state where the mortar layer 4 is bonded to the concrete skeleton 2. In the following description, the case of FIG. 1A in which the outer wall 1 includes the concrete skeleton 2 and the mortar layer 4 will be described in order to avoid redundant description.

  The outer wall 1 is formed with an insertion hole 7 having a predetermined diameter and penetrating the mortar layer 4 and drilling the concrete skeleton 2 to a predetermined depth. In the insertion hole 7, a counterbore 8 having a diameter larger than the diameter of the insertion hole 7 in the concrete skeleton 2 is formed at an opening of the mortar layer 4. The counterbore 8 is formed in a shape corresponding to a pin head 31 of an anchor pin 30 described later. Here, the resin injector 10 will be described with reference to FIG.

  The resin injector 10 includes a pump-type injector main body 11 for supplying the resin R, and an injection nozzle 12 detachably mounted on the injector main body 11. As shown in FIG. 18, the injector body 11 includes a cylindrical casing 70, a pump body 71 to which the casing 70 is detachably attached, and a substantially “L” -shaped lever 72 held by the pump body 71. Have. In the pump body 71, a casing 70 filled with resin R in a tube is set from the right side in the figure, and the injection nozzle 12 is mounted from the left side in the figure. The injector main body 11 is configured to inject the resin R from the injection nozzle 12 by a predetermined amount by manually operating (reciprocatingly rotating) the lever 72. The resin R to be injected is an epoxy resin, but may be another resin.

  The injection nozzle 12 includes a main body joint 14, a nozzle main body 15 (nozzle) extending from the main body joint 14 and having a discharge port 22 at a distal end, and an adjustment seal 16 attached to the nozzle main body 15. . In a state where the injection nozzle 12 is inserted into the insertion hole 7, the resin injection device 10 seals the counterbore 8 of the insertion hole 7 with the adjustment seal 16, and inserts the nozzle inserted into the deep bottom of the insertion hole 7. The resin R can be injected from the discharge port 22 of the main body 15.

  The main body joint part 14 includes a male screw part 17 and a butting part 18 formed integrally with the male screw part 17 on the base side which is the injector main body 11 side, and a flow path of the resin R is formed at the axis. ing. The main body joint portion 14 is detachably attached to the injector body 11 by screwing the male screw portion 17 into a female screw portion (not shown) formed on the pump body 71 of the injector body 11. The inner peripheral surface of the rear end portion of the male screw portion 17 is formed in a funnel shape so that the resin R supplied from the injector body 11 can easily flow in. The abutment portion 18 also serves as a tool engagement portion for screwing the male screw portion 17 into the injector body 11 and a seal receiving portion for receiving the adjustment seal 16. The main body joint 14 holds the nozzle main body 15 formed integrally with the abutting part 18.

  The nozzle main body 15 is composed of a large-diameter outer cylinder 20 formed integrally with the main body joint portion 14 and a small-diameter inner cylinder 21 inserted and fixed to the tip of the outer cylinder 20. The outer cylinder 20 has a predetermined length and is formed so as to be insertable into the insertion hole 7, and has therein a flow path of the same diameter that communicates with the flow path of the resin R formed in the abutting portion 18. And the tip is formed in a tapered shape. The inner peripheral surface of the distal end portion of the outer cylinder 20 is formed to have a small diameter corresponding to the outer diameter of the inner cylinder 21 so that the rear portion of the inner cylinder 21 can be inserted and fixed.

  The inner cylinder 21 has an injection needle-like form in which a discharge port 22 is formed at the distal end, and is fixed to the distal end of the outer cylinder 20 at the rear. Further, an internal flow path connected to the discharge port 22 at the distal end communicates with the flow path of the outer cylinder 20. The discharge port 22 is an opening having an elliptical cross section formed by diagonally cutting the tip of the inner cylinder 21. This allows the resin R to be injected even when the distal end of the inner cylinder 21 is in contact with the bottom of the insertion hole 7 (described later). An adjustment seal 16 is fitted to the outer cylinder 20 on the base side. In addition, it is preferable that the main body joint part 14 and the outer cylinder 20 are integrally formed of resin, and the inner cylinder 21 is preferably formed of a metal such as stainless steel.

  The adjustment seal 16 is formed of a substantially cylindrical rubber member having a hollow portion corresponding to the outer diameter of the outer cylinder 20, and is formed integrally with the sealing portion 24 on the distal end side and the sealing portion 24. And a base-side adjustment unit 25. The sealing portion 24 includes an insertion portion 26 having a small diameter corresponding to the insertion hole 7 and a sealing portion 27 having an outer peripheral portion formed in a substantially conical shape. It comes into contact with the counterbore 8 to seal the counterbore 8. Thus, when the resin R is injected, the return of the resin R from the insertion hole 7 can be prevented. In this case, since the adjustment seal 16 is a rubber-like member, an appropriate sealing effect for the counterbore 8 can be obtained. The inner peripheral portion of the rear end of the adjusting portion 25 is chamfered so as to guide the adjusting seal 16 and easily fit into the outer cylinder 20.

  The adjusting section 25 has a distal end formed integrally with the sealing section 24, has a radial thickness larger than the diameter of the insertion hole 7, and has an axial length adjusted on the base side. It is configured to be possible. That is, the adjusting unit 25 can shorten the axial length by cutting the base side in the circumferential direction. Thereby, the axial length of the adjustment seal 16 to be attached to the outer cylinder 20 is adjusted. Although not shown, it is preferable that a cutting instruction line describing the depth dimension of the insertion hole 7 is provided on the outer peripheral surface of the adjustment unit 25.

  Therefore, the adjusting seal 16 can adjust the length of the adjusting section 25 in the axial direction, thereby adjusting the insertion length of the injection nozzle 12 into the insertion hole 7. That is, by adjusting the size of the adjustment seal 16, the discharge port 22 can be made to face the deep bottom of the insertion hole 7, and the resin R can be injected from the deep bottom without leaving a gap in the deep bottom. Hereinafter, a method of adjusting the adjustment seal 16 will be described with reference to FIG.

  FIG. 3 shows a method of adjusting the injection nozzle 12 when the depth of the insertion hole 7 is changed according to the thickness and characteristics of the finishing material 3 of the outer wall 1. This adjusting method is performed so that the resin R can be injected in a state where the tip of the inner cylinder 21 is close to (or in contact with) the inner bottom of the insertion hole 7. Adjust the insertion length of. For example, as shown in FIG. 3 (a), when the insertion hole 7 has a shallow drilling depth, the prepared adjustment seal 16 is fitted to the outer cylinder 20 so that the discharge port 22 is located at the bottom. Can be seen. In addition, as shown in FIGS. 3B and 3C, when the outer wall 1 is configured to include the tile 5 in the finishing material 3, the insertion hole 7 has a deep perforation depth. There must be. In this case, by appropriately cutting the adjusting portion 25 of the adjusting seal 16, the axial length of the adjusting seal 16 is adjusted, and the discharge port 22 faces the inner bottom.

  Next, the anchor pin 30 will be described with reference to FIG. The anchor pin 30 is made of stainless steel or the like, and has a pin head 31 having a circular cross section corresponding to the shape of the counterbore 8, a rod-shaped pin body 32 integrally formed with the pin head 31, An O-ring 33 (seal member) attached to the neck portion of the body portion 32 on the pin head 31 side. The anchor pin 30 inserted into the insertion hole 7 has the pin head 31 and the O-ring 33 positioned at the counterbore 8, and the pin body 32 reaches the innermost part of the insertion hole 7.

  An external thread is engraved on the outer peripheral surface of the pin body 32 to increase the pull-out strength, and is formed to have a diameter slightly smaller than the diameter of the insertion hole 7. The pin head 31 is finished by baking or the like so that the upper end surface, which is the top surface, matches the surface of the finishing material 3 (mortar layer 4 or tile 5). The O-ring 33 has an outer diameter slightly larger than the shape of the pin head 31, and is in contact with the pin head 31 when fitted to the pin body 32.

  When the anchor pin 30 is inserted into the insertion hole 7, the pin body 32 anchors the concrete frame 2 and the finishing material 3 via the resin R, and the O-ring 33 surrounds the inner periphery of the counterbore 8. Close to the surface. Then, the pin head 31 and the O-ring 33 close the counterbore 8, and the top surface of the pin head 31 is flush with the surface of the finishing material 3. That is, the anchor pin 30 prevents the resin R from overflowing from the counterbore hole 8 by the O-ring 33, and in this state, the resin R solidifies, so that the pin body 32 is inserted into the insertion hole through the resin R. 7 is fixed. Note that the anchor pin 30 may not include the O-ring 33, and the role of the O-ring 33 may be combined with the pin head 31.

  In addition, as an example of the size of the anchor pin 30 in this case, when the insertion hole 7 is formed with a diameter of 6.5φ, and the counterbore hole 8 is formed with a diameter of 8.5φ and a length of 5 mm. In the above, the anchor pin 30 is prepared such that the diameter of the pin head 31 is 8.2φ, the diameter of the pin body 32 is 5.0φ, and the total length is 50, 60, 70 mm. These may be appropriately selected according to the depth of the perforation. For example, when the drilling depth is 60 mm, the anchor pin 30 having a total length of 50 mm may be used.

  Next, a pinning method for repairing the outer wall 1 using the resin injector 10 and the anchor pin 30 will be described in accordance with a construction order. This pinning method includes a perforation step of perforating an insertion hole 7 having a predetermined depth in the outer wall 1, a resin injection step of injecting a resin R into the insertion hole 7 using a resin injector 10, and a resin R And a pin insertion step of inserting the anchor pin 30 into the insertion hole 7 into which the hole has been injected. FIGS. 5 to 7 show process diagrams of this construction process. FIG. 5 (a) shows a drilling process, and FIGS. 5 (b), 6 (c) and (d) show resin injection. FIG. 7E and FIG. 7F show a pin insertion step.

  First, in the drilling step, as shown in FIG. 5A, the outer wall 1 is drilled using a drilling tool such as a drill 40. That is, the concrete skeleton 2 is perforated to a predetermined depth so as to penetrate the mortar layer 4 as the finishing material 3, and the insertion hole 7 is formed. In this case, the insertion hole 7 and the counterbore hole 8 are formed at the same time by using a drill with the auxiliary bit 41 attached to the base of the drill 40 (two-stage digging operation). Thereafter, the chips attached to the insertion hole 7 are suctioned and cleaned with a blower or the like, and the process proceeds to a resin injection step.

  In the resin injection step, as shown in FIG. 5B, the axial length of the adjusting portion 25 of the adjusting seal 16 is cut in advance so that the discharge port 22 of the inner cylinder 21 reaches the deep bottom of the insertion hole 7. Thus, the insertion length of the outer cylinder 20 is adjusted so that the distal end of the inner cylinder 21 approaches or comes into contact with the inner bottom of the insertion hole 7. Then, the sealing portion 24 of the adjustment seal 16 is pressed against the counterbore hole 8, and while the sealing portion 24 is sealed, the lever 72 of the injector body 11 is operated (pumping operation) to inject the resin R into the insertion hole 7. To go. The resin R flows through the body joint portion 14, the outer cylinder 20, and the inner cylinder 21 in order, is discharged from the discharge port 22 of the inner cylinder 21, and starts to be injected from the deep bottom of the insertion hole 7 (FIG. 6C). reference).

  By further operating the lever 72, the resin R is injected from the deep bottom of the insertion hole 7 toward the opening. As a result, the resin R wraps around the inner cylinder 21 and subsequently wraps the outer cylinder 20, and is further injected into the gap 6 at the interface between the concrete skeleton 2 and the mortar layer 4. When the resin R is filled up to the vicinity of the counterbore 8, the pumping becomes extremely heavy, and it is felt that the injection of the resin R is completed (see FIG. 6D). In this case, since the resin R is injected while the counterbore hole 8 is sealed by the sealing portion 24, the resin R does not overflow from the insertion hole 7 at the time of injection.

  In addition, an appropriate amount of the resin R injected from the resin injector 10 is injected in preparation for insertion of the anchor pin 30. Since the insertion length of the outer cylinder 20 into the insertion hole 7 can be determined from the length of the adjustment seal 16, specifically, the axial length of the adjustment portion 25, the insertion length of the outer cylinder 20 (or The length of the adjustment seal 16 in the axial direction is determined in advance so that an appropriate amount of the resin R can be injected. After the appropriate amount of resin R has been injected, the resin injector 10 is pulled out of the insertion hole 7 and the process proceeds to a pin insertion step. In addition, in the resin injection of the embodiment, since air is not sealed in the insertion hole 7, even if the injection nozzle 12 is pulled out from the insertion hole 7, the resin R does not leak (inversely, the inside of the insertion hole 7 is negative). Pressure).

  In the pin inserting step, the resin R is inserted into the insertion hole 7 while guiding the pin body 32 of the anchor pin 30 (see FIG. 7E). The anchor pin 30 is inserted into the inner bottom portion so as to push the resin R in the insertion hole 7. Along with this, the resin R flows into the gap 6 so as to fit into the pin body 32, and a part of the resin R is pushed out toward the counterbore 8. When the pin body 32 of the anchor pin 30 reaches the bottom, the O-ring 33 comes into close contact with the inner peripheral surface of the counterbore 8, and the pin head 31 is accommodated in the counterbore 8, and the pin head 31 The surface is flush with the surface of the mortar layer 4. Therefore, the counterbore hole 8 is sealed by the O-ring 33, and the injected resin R does not leak from the insertion hole 7. By curing in this state, the anchor pin 30 can be connected to the concrete frame via the resin R. The anchor 2 and the mortar layer 4 are anchored with sufficient pulling strength (see FIG. 7F).

  As described above, by the above three steps, the step of repairing the outer wall 1 can be simplified, and sufficient pinning strength can be maintained. Further, since the anchor pin 30 whose top surface of the pin head 31 is finished is inserted so as to be flush with the surface of the finishing material 3, unevenness of the finishing material 3 in the counterbore 8 is prevented. And post-treatments such as a surface treatment with a putty and a coating treatment can be omitted. Note that, instead of forming the outer cylinder 20 integrally with the abutting portion 18 (the main body joint portion 14), the outer cylinder 20 may be configured separately from the main body joint portion 14.

  Next, another embodiment of the injection nozzle 12 in the resin injector 10 of the present embodiment will be described. FIG. 8 shows an injection nozzle 12 according to the second embodiment. In this embodiment, the nozzle body 15 is formed of a single cylindrical tapered nozzle. The tapered nozzle is a tapered cylindrical body that forms a flow path of the resin R at the axis and has a discharge port 22 at the tip end, and is formed integrally with the main body joint portion 14. That is, the base side of the tapered nozzle is sufficiently thinner (smaller than the insertion hole 7) and has a sufficient length as compared with the conventional commercially available injection nozzle 12. Also in this case, the adjusting seal 16 is detachably mounted on the base side of the tapered nozzle.

  According to this configuration, by adjusting the size of the adjustment seal 16, the discharge port 22 of the tapered nozzle can face the deep bottom of the insertion hole 7. The adjustment of the adjustment seal 16 in this case is configured by a selection formula described later, and it is preferable to select and adjust one of a plurality of types of the adjustment seals 16. Also in this case, the tapered nozzle may be formed separately from the main body joint portion 14 so as not to be formed integrally with the main body joint portion 14, and may be configured to be freely inserted into and removed from the main body joint portion 14.

  9 to 11 show an injection nozzle 12 according to the third embodiment. This embodiment has a form similar to that of the first embodiment, but the inner cylinder 21 is configured to be slidable. That is, the nozzle body 15 is the same in that it is composed of a large-diameter outer cylinder 20 and a small-diameter inner cylinder 21 formed integrally with the abutting portion 18, but a part of the inner cylinder 21 , Are slidably held by the outer cylinder 20. That is, the base side of the inner cylinder 21 is engaged with the outer cylinder 20 in a nested manner, and is configured to be able to advance and retreat with respect to the outer cylinder 20.

  The inner cylinder 21 has a discharge port 22 at the distal end, and a guiding part 23 formed in a funnel shape at the tail end, and the internal flow path communicates with the flow path of the outer cylinder 20. I have. The guiding portion 23 is formed so as to expand so that the resin R flowing from the outer cylinder 20 can be easily introduced into the inner cylinder 21. The outer cylinder 20 is formed so that the inner diameter excluding the distal end is larger than the shape of the guiding portion 23, while the inner diameter of the distal end is formed to be substantially the same as the outer diameter of the inner cylinder 21. And is formed larger than the shape of the guiding portion 23. Therefore, even if the inner cylinder 21 slides to the maximum with respect to the outer cylinder 20, the guide portion 23 abuts at the position of the distal end of the outer cylinder 20, so that the inner cylinder 21 does not fall off the distal end of the outer cylinder 20. .

  In this case, the resin R supplied from the injector main body 11 flows through the main body joint portion 14, the outer cylinder 20, and the inner cylinder 21 in this order, but the inner cylinder 21 uses the guiding part 23. When the resin R is drawn from the outer tube 20, the flow-in resistance of the resin R flowing through the outer tube 20 causes the guide portion 23 to be pushed toward the distal end and slide toward the distal end. I have. Therefore, the inner cylinder 21 slides toward the distal end side with respect to the outer cylinder 20 in response to the injection input of the resin R, and when the distal end abuts against the bottom of the insertion hole 7, the slide is suppressed. You.

  Note that the outer cylinder 20 has a predetermined length and is formed so as to be insertable into the insertion hole 7, that the adjustment seal 16 is fitted on the base side, and that the discharge port 22 is The other configuration is the same as that of the first embodiment, such as having an opening with an elliptical cross section formed by cutting the tip of the inner cylinder 21 obliquely. However, the adjustment seal 16 in this embodiment does not adjust the insertion depth of the discharge port 22 of the injection nozzle 12 but directly adjusts the insertion length of the outer cylinder 20 because the inner cylinder 21 is slidable. Is adjusted.

  To put it simply, unlike the first embodiment, the adjustment seal 16 is not exclusively used to make the distal end of the inner cylinder 21 face the deep bottom of the insertion hole 7. Rather, the main purpose is to adjust the insertion length of the outer cylinder 20 into the insertion hole 7, and the sub-object is to make the distal end portion of the inner cylinder 21 abut against the bottom portion of the insertion hole 7. That is, the outer cylinder 20 is inserted into the insertion hole 7 using the adjustment seal 16 so that the volume of the outer cylinder 20 (preferably including the volume of the inner cylinder 21) substantially matches the volume of the anchor pin 30. The depth is adjusted. Based on this point, a method of adjusting the adjustment seal 16 will be described below with reference to FIGS.

  FIGS. 10 and 11 show a resin injecting step in the case where the adjustment seal 16 having the adjustment portion 25 having a predetermined axial length is attached to the outer cylinder 20. As shown in FIG. 10A, in a state where the adjustment seal 16 of the injection nozzle 12 is sealed by contacting the counterbore 8, the discharge port 22 of the inner cylinder 21 does not reach the bottom. ing. From this state, the resin R is injected into the insertion hole 7 by operating the lever 72 of the injector body 11. The resin R flows through the main body joint portion 14, the outer cylinder 20, and the inner cylinder 21 in order, and slides the inner cylinder 21 to the inner bottom with respect to the outer cylinder 20, and inserts the distal end of the inner cylinder 21 into an insertion hole. 7, while being in contact with the inner bottom portion, the liquid is injected from the discharge port 22 (see FIG. 10B).

  Thereby, the resin R is injected from the bottom portion of the insertion hole 7, so that the resin R can be appropriately injected without generating a gap (air pool) at the bottom portion. Therefore, in the initial stage of the resin injection process, even if the adjustment seal 16 is not accurately adjusted so that the discharge port 22 reaches the deep bottom, the inner cylinder 21 slides, so that the discharge port 22 faces the deep bottom. The resin R can be injected. Thereby, the above-mentioned sub-object is achieved.

  Next, the main purpose of adjusting the insertion length of the outer cylinder 20 will be described. By further operating the lever 72 from the above state, the resin R is injected from the deep bottom of the insertion hole 7 to the front opening side, and is injected into the gap 6 between the concrete skeleton 2 and the mortar layer 4. It spreads to the vicinity of the counterbore 8. (See FIG. 11C). In this case, the insertion hole 7 has a resin unfilled portion into which the resin R has not been injected, particularly by the volume of the outer cylinder 20. Therefore, the length of insertion of the outer cylinder 20 into the insertion hole 7 corresponds to the amount of the resin unfilled portion.

  On the other hand, the insertion length of the outer cylinder 20 can be adjusted by adjusting the axial length of the adjustment section 25. Therefore, the insertion length of the outer cylinder 20 can be known from the axial length of the adjusting portion 25, and the amount of the resin unfilled portion can be known. Therefore, if the axial length of the adjustment unit 25 is known, the amount of the resin-unfilled portion is inevitably determined, so that the axial length of the adjustment unit 25 can be used as an index of the amount of resin to be injected. That is, by quantifying the amount of resin to be injected in advance from the relationship between the axial length of the adjustment unit 25 and the amount of perforation of the insertion hole 7, an appropriate amount of resin R can be injected. Thereby, an appropriate amount of the resin R injected from the resin injector 10 is injected in preparation for insertion of the anchor pin 30. Note that the punching step and the pin inserting step are the same as in the first embodiment, and thus are omitted.

  12 to 14 show an injection nozzle 12 according to the fourth embodiment. The injection nozzle 12 has an inner cylinder 21 formed to have a small diameter and a slightly larger diameter at the rear end, an outer cylinder 20 formed to have a larger diameter than the inner cylinder 21 and incorporating a part of the inner cylinder 21, A spring 28 housed in the cylinder 20, a main body joint 14 connected to the rear part of the outer cylinder 20, and an O-ring 19 fitted between the outer cylinder 20 and the main body joint 14 are provided. . In addition, a female screw is formed in the main body joint portion 14, and this portion is attached to the injector main body 11.

  The inner cylinder 21 has a discharge port 22 at a distal end, a front end of a spring 28 abuts at a rear end, and an outer peripheral surface of a body of the inner cylinder 21 is held at a distal end of the outer cylinder 20. It is configured to be slidable with respect to the tube 20. The outer cylinder 20 is formed such that the inner diameter of the distal end is made slightly narrower, and houses a spring 28 between the rear end of the inner cylinder 21 and the main body joint 14. Note that the rear end of the inner cylinder 21, which is slightly larger, is engaged with the front end of the outer cylinder 20 so as not to fall off the front end of the outer cylinder 20. Further, the inner cylinder 21 and the outer cylinder 20 are formed to have a smaller diameter than the insertion hole 7 formed by the pinning method. Further, as described later, the O-ring 19 abuts against and seals the counterbore hole 8 of the insertion hole 7 when injecting the resin.

  The main body joint 14 has an opening, which is a flow path for the resin R, communicating with the inside of the outer cylinder 20, and the rear end of the spring 28 abuts against the inner deep wall of the main body joint 14 at the position of the opening. I have. Therefore, the inner cylinder 21 is urged toward the distal end in the normal state by the resilient action of the spring 28, and slides into a state where the rear end of the inner cylinder 21 abuts on the distal end of the outer cylinder 20. ing. On the other hand, the inner cylinder 21 is configured to slide toward the base by applying an external force to the base at the tip. However, when the outer cylinder 20 is filled with the resin R (the resin R enters the gap with the inner cylinder 21), the spring force of the spring 28 is extremely weakened due to the viscous resistance of the resin R. , Which slides the inner cylinder 21 to complement the injection input of the resin R.

  FIG. 14 shows a part of the process of injecting the resin R using the resin injector 10. The insertion depth of the insertion hole 7 with the counterbore 8 is shorter (shallower) than the total length of the inner cylinder 21 and the outer cylinder 20 in the normal state of the resin injector 10. When the inner cylinder 21 and the outer cylinder 20 are inserted into the insertion holes 7 and the O-ring 19 is abutted against the counterbore 8, and the injector body 11 is pumped, the spring force of the spring 28 and the injection of the resin R are performed. As a result, the distal end of the inner cylinder 21 comes into contact with the inner bottom of the insertion hole 7. Further, by repeating the pumping, the resin R is injected from the discharge port 22 of the inner cylinder 21, and the insertion hole 7 is filled with the resin R from the deep bottom.

  FIG. 15 shows an injection nozzle 12 according to the fifth embodiment. In the injection nozzle 12, the adjustment seal 16 is received not by the main body joint portion 14 but by the stopper 29 fixed to the outer peripheral surface of the outer cylinder 20. Needless to say, the stopper 29 may not be of a fixed type but may be of a type that can be moved and adjusted in the axial direction. For example, the stopper 29 is a female screw (preferably, a double nut), and is screwed to a male screw formed on the base side of the outer cylinder 20 so that the movement can be adjusted. This makes it possible to adjust the insertion length of the outer cylinder 20 into the insertion hole 7 by appropriately moving the position of the stopper 29.

  16 and 17 show another embodiment of the adjustment seal 16. As shown in FIG. 16A, a plurality of types of adjustment seals 16 having different overall lengths (axial lengths) are prepared. Each of the adjustment seals 16 has a sealing portion 24 and a sealing portion 24. And the adjusting portions 25 formed integrally with each other and having different axial lengths. For example, one having the same sealing portion 24 and a total length of α, β, γ, and δ is prepared. In other words, a plurality of types of adjusting seals 16 having different total lengths are provided so as to be exchangeable so as to correspond to the depth of the insertion hole 7, and one of the types can be selected and used. Thus, the resin R can be injected from the bottom of the insertion hole 7.

  As shown in FIG. 16B, the adjusting seal 16 includes a sealing portion 24 and a plurality of types of adjusting portions 25 formed separately from the sealing portion 24 and having different axial lengths. I have. That is, a plurality of types of the adjusting portions 25 are prepared as pieces having different axial lengths, and the pieces can be appropriately selected and used in combination to correspond to the depth of the insertion hole 7. For example, a plurality of types of adjusting portions 25 having axial lengths of L1, L2, L3 and L4 are prepared, and by appropriately combining them, the adjusting portions 25 correspond to the drilling depth of the insertion hole 7. is there. Here, the sealing portion 24 and the adjusting portion 25 having the length L1 may be combined for the insertion hole 7 at the shallowest, and the sealing hole 24 for the insertion hole 7 having a length of L2 or more and L3 or less is sealed. What is necessary is just to combine the part 24 and the adjustment part 25 whose length is L1 and L2.

  Further, as shown in FIG. 16C, the adjustment seal 16 includes a sealing portion 24 and a plurality of adjusting portions 25 formed separately from the sealing portion 24 and having the same axial length. ing. That is, a plurality of the adjusting portions 25 are prepared as pieces having the same axial length, and the pieces can be appropriately selected and used in combination to correspond to the drilling depth of the insertion hole 7. . Note that the shape of the sealing portion 24 may be tapered.

  Further, as shown in FIG. 16D, the adjusting seal 16 includes a sealing portion 24 and an adjusting portion 25 formed integrally with the sealing portion 24. The adjusting portion 25 is formed by making cuts (cutting instruction lines) in the circumferential direction at a plurality of locations. That is, the adjusting unit 25 is formed by arranging a plurality of pieces (four pieces in FIG. 16D). Each piece can be separated from an adjacent piece, and the adjustment seal 16 is configured to be adjustable in length in the axial direction. In addition, according to the adjusting seal 16, the adjusting seal 25 is detachable even from the state of being attached to the outer cylinder 20 or the like, and the length of the adjusting unit 25 can be quickly adjusted.

  As shown in FIG. 17A, the adjustment seal 16 includes a sealing portion 24 and an adjustment portion 25 formed separately from the sealing portion 24. The length in the axial direction can be adjusted by being screwed into the shaft. That is, in the sealing portion 24, the external thread 50 is formed on the outer peripheral surface of a portion protruding from the adjustment portion 25 side, while the adjustment portion 25 is formed to be depressed corresponding to the protruding portion. Inside, a female screw 51 to be screwed with the male screw 50 is formed. The axial length can be adjusted by the screw length of the sealing portion 24 to the adjusting portion 25. The shaft center is formed in a hollow shape corresponding to the outer diameter of the outer cylinder 20 or the like on which the adjustment seal 16 is mounted. Formed on the side.

  Further, as shown in FIG. 17B, the adjustment seal 16 includes a sealing portion 24 and an adjusting portion 25 formed separately from the sealing portion 24. , The axial length can be adjusted. That is, the sealing portion 24 has the engagement protrusion 60 protruding toward the adjustment portion 25 side. The engagement protrusion 60 has an engagement protrusion 61 formed at a rear end thereof, and the engagement protrusion 61 engages with an engagement recess 63 described later. The adjusting portion 25 has a retaining portion 62 formed to be depressed corresponding to the engaging projection 60. A plurality of engagement recesses 63 are formed in the retaining portion 62 in the axial direction. Therefore, the adjustment seal 16 can be adjusted in the axial direction by engaging the engagement protrusion 61 with the engagement recess 63 corresponding to the depth of the insertion hole 7.

  Therefore, according to the above-described adjustment seal 16, it is possible to provide the resin injector 10 corresponding to the depth of the insertion hole 7. That is, the resin injector 10 allows the discharge port 22 to face the bottom of the insertion hole 7 by adjusting the adjustment seal 16, and injects the resin R from the bottom without leaving a gap in the bottom. Will be able to do it.

  As described above, the case where the finishing material 3 mainly consists of only the mortar layer 4 in the construction process of the pinning method has been described, but as shown in FIG. However, the same applies to the case where tile 5 is also included. As a construction method in this case, it is more preferable to perform the drilling directly on the tiles 5 instead of performing the pinning method on the joints between the tiles 5.

It is a cross-sectional schematic diagram which uses the resin injector used for the pinning method concerning one Embodiment of this invention with respect to the insertion hole formed in the outer wall. FIG. 3A is a plan view showing a nozzle body of the resin injector, and FIG. FIG. 5 is a schematic partial cross-sectional view showing a state in which the adjustment seal length of the resin injector is made to correspond to the depth of the insertion hole. It is a top view of an anchor pin. It is a (a) perforation process drawing which shows the construction process of the pinning method, and (b) is a resin injection process first half figure. It is a (c) resin injection process middle stage figure and the (d) resin injection process late stage figure which show the construction process of a pinning method. It is a (e) early stage figure of a pin insertion process which shows the construction process of a pinning method, and (f) a late stage diagram of a pin insertion process. It is a top view of an injection nozzle concerning a 2nd embodiment. It is the (a) top view and the (b) sectional view showing the injection nozzle concerning a 3rd embodiment. It is a (a) resin injection process early stage figure and (b) resin injection process middle stage figure which show the construction process of the pinning method using the injection nozzle which concerns on 3rd Embodiment. (C) A late drawing of a resin injection step showing an execution step of a pinning method using an injection nozzle according to a third embodiment. It is a partial section front view of an injection nozzle concerning a 4th embodiment. It is a front view of the injection nozzle concerning a 4th embodiment. It is a partial section schematic diagram showing the state where the injection nozzle concerning a 4th embodiment was inserted in the insertion hole. It is a front view of the injection nozzle concerning a 5th embodiment. It is a front view of the adjustment seal concerning other embodiments. It is a front view of the adjustment seal concerning other embodiments. It is a top view which shows the injector main body of a resin injector.

Explanation of reference numerals

Reference Signs List 1 outer wall 2 concrete body 3 finishing material 4 mortar layer 5 tile 6 gap 7 insertion hole 8 counterbore hole 10 resin injector 12 injection nozzle 14 main body joint part 15 nozzle body 16 adjustment seal 20 outer cylinder 21 inner cylinder 22 discharge port 23 Attracting part 24 Sealing part 25 Adjusting part 28 Spring 30 Anchor pin 31 Pin head

Claims (5)

In an injection nozzle for injecting an adhesive resin into an insertion hole formed by penetrating the finishing material and drilling the body to a predetermined depth,
A nozzle having a discharge port at the tip and inserted into the insertion hole,
An adjustment seal attached to the outer peripheral surface on the base side of the nozzle, abutting against the opening of the insertion hole and sealing the same.
By adjusting the length of the adjusting seal in the axial direction on the base side thereof, the insertion length of the nozzle into the insertion hole can be adjusted so that the discharge port reaches the bottom of the insertion hole. An injection nozzle characterized by being configured as described above. The adjustment seal is configured to be adjustable by cutting the base side,
The injection nozzle according to claim 1, wherein a plurality of cutting instruction lines indicating the depth of the insertion hole are formed in the adjustment seal.   The injection nozzle according to claim 1, wherein the adjustment seal is divided into a plurality of pieces.   A resin injector comprising: the injection nozzle according to claim 1; and an injector body to which the injection nozzle is detachably mounted. A pinning method for repairing an outer wall made of a skeleton and a finishing material using the resin injector according to claim 4,
A perforation step of penetrating the finishing material, and perforating the frame to a predetermined depth to form an insertion hole;
A resin injecting step of injecting a resin from the bottom of the insertion hole with the insertion hole sealed by the resin injector,
A pin insertion step of inserting the anchor pin for anchoring the finishing material to the frame in the insertion hole into which the resin has been injected.