JP3759157B1 - Injection nozzle for pinning method and pinning method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection nozzle for a pinning method capable of sufficiently injecting an adhesive to "float" generated between a casing and a mortar and between a mortar and a finishing material, and a pinning method using the same To do.
An injection nozzle 16 for a pinning method in which an adhesive R is injected into an insertion hole 8 penetrating a finishing material 4 and a mortar 3 and drilling a casing 2 to a predetermined depth. The nozzle body 26 is attached to the injector body 15 and has an adhesive flow path 58 connected to the injector body 15 therein, the proximal end side is held by the nozzle body 26, and the discharge port 35 is provided at the distal end. A nozzle inner cylinder 25 having a first injection channel 37 communicating the discharge port 35 and the adhesive channel 58 inside, and an inner cylinder holding portion 40 of the nozzle body 26 for holding the nozzle inner cylinder 25. The second injection flow path 52 is formed in the gap between the nozzle inner cylinder 25 and the adhesive flow path 58 and is opened to the tip of the nozzle body 26.
[Selection] Figure 3

Description

  The present invention relates to an injection nozzle for a pinning method used for repairing a wall body such as an outer wall or an inner wall in which so-called “floating” has occurred, and a pinning method using the same.

  Conventionally, as this kind of injection nozzle, a nozzle main body (body main body) having a resin flow path formed in the axial center and a base end portion are held by the nozzle main body, and are connected to the resin flow path and formed an injection flow path. An injection needle (nozzle inner cylinder) is known (see Patent Document 1). In this case, the nozzle body is made of fluoro rubber, and has a tapered portion that seals the opening of the insertion hole on the tip side. On the other hand, as a pinning method using this injection nozzle, a drilling process for drilling an insertion hole in a repaired portion of the outer wall made of finishing material (tile, stone, etc.), mortar and concrete frame, and a drilling insertion hole A resin injection step of injecting an adhesive resin (adhesive) using a resin injector equipped with an injection nozzle, and a pin insertion step of inserting anchor pins into the insertion holes into which the resin has been injected, What you have is known.

In this case, in the resin injection step, when the injection nozzle of the resin injector is inserted and pressed into the drilled insertion hole, the taper portion is in close contact with the opening of the insertion hole and sealed. When the resin injector is operated (pumping) in this state, the resin is gradually filled from the deepest portion of the insertion hole, and reaches the floating portion between the concrete frame and the mortar. Further, the resin injection is completed by performing the pumping a predetermined number of times.
JP 2003-147971 A

  However, in such an injection nozzle, when “floating” occurs not only between the concrete frame and the mortar but also between the mortar and the finishing material around the insertion hole, Since air escapes, the resin spreads only to the “float” between the concrete frame and the mortar first, and the resin may not reach the “float” between the mortar and the finishing material. In such a case, the resin must be injected into this portion while pulling out the injection nozzle. However, when the injection nozzle is pulled out, the opening of the insertion hole is unsealed, so there is a problem that the resin cannot be sufficiently distributed to the “float” between the mortar and the finishing material. .

Then, this invention makes it a subject to provide the injection nozzle for the pinning method which can fully inject | pour an adhesive agent also into the shallow part before this insertion hole, and the pinning method using the same.

The injection nozzle for the pinning method of the present invention is used by being attached to the injector body, and injecting the adhesive while sealing the opening into the insertion hole in which the wall body is drilled to a predetermined depth. In a nozzle for injection, a nozzle body which is mounted on the injector body and has an adhesive flow path connected to the injector body inside, and is held by the nozzle body in a state protruding from the tip of the nozzle body, and a discharge port at the tip And a nozzle inner cylinder having a first injection flow path communicating with the discharge port and the adhesive flow path inside, and an inner cylinder holding portion and a nozzle inner cylinder of a nozzle body for holding the nozzle inner cylinder The second injection channel that is connected to the adhesive channel and opened to the tip of the nozzle body is formed in the gap.

  In this case, in the first injection channel and the second injection channel, the flow resistance of the adhesive flowing through the first injection channel becomes the flow resistance of the adhesive flowing through the second injection channel in the initial stage of injection of the adhesive. It is preferable to be configured so as to be smaller than that.

According to this configuration, when the adhesive is injected into the insertion hole while the opening of the insertion hole is sealed by the nozzle body, the adhesive first passes through the first injection flow channel of the nozzle inner cylinder. It discharges from the discharge port and fills gradually from the deepest part of the insertion hole. Eventually, the adhesive reaches the floating portion between the housing and the mortar and flows into the floating portion. At the same time, the adhesive is discharged from the tip of the nozzle body through the second injection channel provided in the gap between the nozzle body and the nozzle inner cylinder, and is filled from before the insertion hole. Go. Eventually, the adhesive spreads to a shallow portion before the insertion hole such as a floating portion between the mortar and the finishing material.

  In this case, the nozzle body includes a body main body that holds the nozzle inner cylinder and seals the opening of the insertion hole on the outer peripheral surface, and a mounting bracket for mounting the body main body to the injector main body. The main body is preferably made of an elastic material.

  According to this configuration, when the nozzle body is pressed against the opening of the insertion hole, the outer peripheral surface of the body main body comes into close contact with the elastic body, and the elastic material is appropriately deformed to seal the opening. By this sealing, the return of the adhesive from the insertion hole is prevented, and the adhesive can be filled without excess or deficiency. The elastic material is a material that is slightly deformed by the pressing force of the operator, and the second injection channel is not blocked.

  In this case, the nozzle body includes a body main body that holds the nozzle inner cylinder and seals the opening of the insertion hole on the outer peripheral surface, and a mounting bracket for mounting the body main body to the injector main body. The main body has a nozzle outer cylinder that constitutes the inner cylinder holding portion, and a sealing member that includes the nozzle outer cylinder and seals the opening, and the nozzle outer cylinder is made of a hard resin material or a metal material. The sealing member is preferably made of an elastic material.

  According to this configuration, when the nozzle body of the injection nozzle is pressed against the opening of the insertion hole, the outer peripheral surface of the body main body is brought into close contact with the elastic body, and the elastic material is appropriately deformed to seal the opening. By this sealing, the return of the adhesive from the insertion hole is prevented, and the adhesive can be filled without excess or deficiency. Further, since the nozzle outer cylinder is hard, deformation of the second injection flow path due to the pressure of the nozzle body can be prevented, and the flow rate of the adhesive, the flow resistance, and the like can be stabilized.

  In this case, the elastic material is preferably fluororubber.

  According to this configuration, since the fluororubber is solvent resistant, deterioration with time due to the adhesive can be prevented.

  In this case, it is preferable that the nozzle inner cylinder is held by the inner cylinder holding portion so as to be able to advance and retreat.

  According to this configuration, when the adhesive is injected, the nozzle inner cylinder moves forward in the injection direction with respect to the nozzle body due to the viscous resistance (flow resistance) of the adhesive flowing through the first injection flow path of the nozzle inner cylinder. Since it hits the deepest part of the filling hole, it is possible to always inject the adhesive from the deepest part of the insertion hole even if the depth of the insertion hole varies. As a result, air cannot be accumulated in the deepest portion of the insertion hole. However, it is also possible to extend the nozzle inner cylinder to the maximum in advance, abut the inner cylinder of the nozzle in the deepest part of the insertion hole (retreat), and then inject the adhesive.

Pinning method of the present invention, the above injection nozzle, using an adhesive injector the injection nozzle consists of a syringe body which is detachably mounted in the pinning method for repairing a wall, a predetermined depth of the wall A punching process for forming an insertion hole by drilling up to a depth, an adhesive injection process for injecting an adhesive into the insertion hole while sealing the opening of the insertion hole with an adhesive injector, and an adhesive is injected And a pin insertion step of inserting an anchor pin into the insertion hole.

According to this configuration, after the insertion hole is drilled in the repair required portion of the wall body, the adhesive is injected from the deepest portion of the insertion hole by the adhesive injector. Thereafter, the anchor pin is inserted to the deepest portion in the insertion hole into which the adhesive has been injected. In this case, since the injection nozzle having the first injection channel and the second injection channel is used, the adhesive is injected from the deepest side and the opening side of the insertion hole . For example, the floating portion between the housing and the mortar and the floating portion between the mortar and the finishing material can be sufficiently distributed.

As described above, according to the present invention, since the adhesive can be injected also from the opening side of the insertion hole by the second injection flow path, the “floating” generated between the mortar and the finishing material. It is possible to sufficiently inject the adhesive even in a shallow portion before the insertion hole such as “”. Therefore, the wall body in which “floating” has occurred can be completely repaired.

  Hereinafter, an injection nozzle for a pinning method according to an embodiment of the present invention and a pinning method using the same will be described with reference to the accompanying drawings. This pinning method inserts the injection nozzle of the adhesive injector from the opening into the insertion hole drilled in the repaired part of the inner wall (wall body) such as the outside wall of the building where the “floating” has occurred, or a hole or hole. Then, an adhesive is injected, and then an anchor pin is inserted and repaired. Hereinafter, the case where it constructs on the outer wall of a building is demonstrated.

  FIG. 1 is a schematic view when an adhesive injector is used for the outer wall. As shown in FIG. 1, the outer wall 1 of a building is composed of a concrete frame 2 as a foundation, a mortar 3 applied to the surface, and a finishing material 4 such as tiles attached to the surface from the left side of the figure. Thus, a first floating portion (gap) 6 is generated between the concrete housing 2 and the mortar 3, and a second floating portion 7 is generated between the mortar 3 and the finishing material 4. In order to repair this, the outer wall 1 is formed with an insertion hole 8 penetrating the finishing material 4 and the mortar 3 and drilling the concrete casing 2 to a predetermined depth. Then, the outer wall 1 is repaired by injection of the adhesive R by the adhesive injector 10 and insertion of the anchor pin 70 (see FIGS. 4 and 7) into the insertion hole 8. .

  Here, the adhesive injector 10 will be described with reference to FIG. The adhesive injector 10 is composed of a pump-type injector body 15 that mainly supplies the adhesive R, and a pinning method injection nozzle 16 that is detachably attached to the tip of the injector body 15. It is configured.

  The injector body 15 includes a cylindrical casing 18 extending to the proximal end side, a pump body 19 to which the casing 18 is detachably attached, a substantially “L” -shaped lever 20 held by the pump body 19, and It has. The casing 18 is filled with an adhesive R, and the casing 18 is set on the pump body 19 from the right side in the figure, and the injection nozzle 16 is mounted from the left side in the figure. The injector body 15 is configured to discharge the adhesive R from the injection nozzle 16 by a certain amount by manually operating (pumping) the lever 20. The adhesive R uses an epoxy resin which is an adhesive resin, but is not limited to this, and may be an inorganic adhesive having viscosity.

  As shown in FIG. 3, the injection nozzle 16 is composed of a small-diameter nozzle inner cylinder 25 located on the distal end side, and a nozzle body 26 that forms the main body of the injection nozzle 16. A body main body 27 that holds the proximal end side of the inner cylinder 25, and a mounting fitting 28 that is mounted on the injector main body 15 while holding the body main body 27 are configured.

  The mounting bracket 28 includes a joint member 29 screwed into the pump main body 19 of the injector main body 15 and a cylindrical fastening member 30 for fixedly attaching the joint member 29 to the body main body 27. The injection nozzle 16 engages the base end side of the nozzle inner cylinder 25 with the body main body 27 in a nested manner, inserts the front end side of the joint member 29 into the base end side of the body main body 27, and the front end side of the body main body 27. Then, the fastening member 30 is covered and the fastening member 30 is screwed to the joint member 29 to be assembled.

  The nozzle inner cylinder 25 is formed like an injection needle using a metal pipe such as stainless steel or a resin pipe, and is held slidable (movable back and forth) within the body main body 27. And a restricting portion 36 formed at the base end portion. A first injection channel 37 communicating with the discharge port 35 from the restricting portion 36 is formed at the axial center of the nozzle inner cylinder 25, and a joint member is connected to the first injection channel 37 via the restricting portion 36. 29 adhesive flow paths (described later) 58 communicate with each other. The discharge port 35 is cut obliquely into an opening having an elliptical cross section, and does not close even when the tip of the nozzle inner cylinder 25 is in contact with the deepest portion of the insertion hole 8, Adhesive R can be injected appropriately. The restricting portion 36 is formed in a funnel shape so that the adhesive R flowing from the adhesive flow path 58 can be easily introduced, and at the same time, prevents the drop when the injection nozzle 16 is pulled out. The length of the nozzle inner cylinder 25 is such that the discharge hole 35 is in contact with the deepest part of the insertion hole 8 and the deepest part of the insertion hole 8 and a retaining part 51 of the nozzle outer cylinder 40 described later. It is longer (about 100 mm) than the gap. The nozzle inner cylinder 25 has a diameter of, for example, an outer diameter of 2 mm and an inner diameter of 1.8 mm.

  The body body 27 includes a nozzle outer cylinder 40 into which the nozzle inner cylinder 25 is loosely inserted, and a sealing member 41 that includes the nozzle outer cylinder 40. The sealing member 41 is made of fluoro rubber, and has a tapered portion 43 that is tapered toward the distal end side, a cylindrical portion 44 that is connected to the tapered portion 43 and is formed in a cylindrical shape, and a cylindrical portion And a thick cylindrical portion 45 having a diameter larger than 44. In this case, since the fluororubber is solvent resistant, deterioration with time is prevented. Inside the thick cylindrical portion 45, a cylindrical mounting groove 46 into which a later-described insertion portion 55 of the joint member 29 is fitted is provided so as to open the proximal end side. A shaft hole 43 is connected to the mounting groove 46 from the tapered portion 43 to the cylindrical portion 44, and a through hole 47 having a diameter smaller than that of the mounting groove 46 is provided.

  The nozzle outer cylinder 40 is formed in a cylindrical shape by a metal pipe such as stainless steel or a resin pipe, and is fitted in the through hole 47. The nozzle outer cylinder 40 is formed to be slightly longer than the through hole 47 and has a slightly larger diameter. For this reason, when the nozzle outer cylinder 40 is press-fitted into the through hole 47 in accordance with the proximal end portion of the through hole 47, the distal end portion slightly protrudes from the distal end portion of the tapered portion 43, and the nozzle outer cylinder 40 is strongly It adheres and is held by this. However, the length of the nozzle outer cylinder 40 may be the same as that of the through hole 47, and the tip of the nozzle outer cylinder 40 and the tip of the tapered portion 43 may be flush with each other. Alternatively, the nozzle outer cylinder 40 and the through hole 47 may have the same diameter, and the nozzle outer cylinder 40 may be liquid-tightly bonded to the through hole 47. Thereby, the nozzle outer cylinder 40 prevents the deformation | transformation of the 2nd injection flow path 52 by press, and stabilizes the flow volume and flow resistance of the adhesive agent R.

  A leak outlet 50 of a second injection flow path 52 to be described later is formed between the nozzle outer cylinder 40 and the nozzle inner cylinder 25, and a funnel-shaped retaining portion formed in an enlarged manner at the base end. 51 is formed. The nozzle inner cylinder 25 is loosely inserted in the axial center of the nozzle outer cylinder 40 over the entire length, and the second injection flow connected to the leak outlet 50 is inserted in the gap between the nozzle inner cylinder 25 and the nozzle outer cylinder 40. A path 52 is configured. That is, in the body main body 27 portion, the nozzle inner cylinder 25 and the nozzle outer cylinder 40 are in the form of a double pipe, and the inner surface of the nozzle inner cylinder 25 is configured with a first injection flow path 37, A second injection channel 52 is formed in the gap between the cylinder 25 and the nozzle outer cylinder 40. When the adhesive is injected, the discharge port 35 opened at the tip of the nozzle inner cylinder 25 faces the deepest part of the insertion hole 8, and the leak outlet 50 opened at the tip of the nozzle outer cylinder 40 is inserted into the insertion hole 8. Facing near the opening. Similarly to the first injection flow path 37, the second injection flow path 52 communicates with the adhesive flow path 58 of the joint member 29 through the retaining portion 51. Also in this case, the retaining portion 51 introduces the adhesive R flowing from the adhesive flow path 58 into the second injection flow path 52 and prevents the nozzle outer cylinder 40 from falling off.

  The nozzle outer cylinder 40 is formed, for example, to have a length of about 40 mm, an outer diameter of 3 mm, and an inner diameter of 2.6 mm. Here, in the first injection channel 37 and the second injection channel 52 described above, the flow resistance of the adhesive R flowing through the first injection channel 37 in the initial stage of injection of the adhesive R causes the second injection channel 52 to have a flow resistance. It is comprised so that it may become small compared with the flow resistance of the adhesive agent R which flows. That is, at the initial stage of injection of the adhesive R, the adhesive R is mainly injected from the first injection flow path 37, and the adhesive R reaches the first floating portion 6 between the concrete housing 2 and the mortar 3. In this case, the adhesive R is mainly injected from the second injection channel 52.

  More specifically, as shown in FIGS. 5 and 6, when the nozzle body 26 is pressed against the opening of the insertion hole 8, the opening is sealed, and at the same time, the tip of the nozzle body 26, that is, the leakage The outlet 50 faces a position on the nearer side than the second floating portion 7. When the adhesive R is injected into the insertion hole 8 while maintaining this sealed state, first, the viscous resistance (flow resistance) of the adhesive R flowing through the first injection flow path 37 of the nozzle inner cylinder 25 and the restricting portion 36 are received. By the injection input of the adhesive R, the nozzle inner cylinder 25 advances in the injection direction. When the nozzle inner cylinder 25 comes into contact with the deepest portion of the insertion hole 8, the flow resistance of the first injection channel 37 is smaller in the initial stage of injection, and therefore, the adhesive is discharged from the discharge port 35 via the first injection channel 37. R is discharged, and the adhesive R is gradually filled from the deepest portion of the insertion hole 8. Eventually, the adhesive R reaches the first floating portion 6 between the concrete housing 2 and the mortar 3 and flows into the first floating portion 6 so as to spread. When the adhesive R is further injected, the flow resistance of the first injection flow path 37 is increased by the already-flowed adhesive R, and this time, the adhesive R is passed through the second injection flow path 52 to which no internal pressure is applied. Is discharged from the leak outlet 50, and the adhesive R is filled from the front of the insertion hole 8. Eventually, the adhesive R reaches the second floating portion 7 between the mortar 3 and the finishing material 4 and is filled in the first floating portion 6 and the second floating portion 7 without excess or deficiency.

  As shown in FIG. 3, the joint member 29 is formed of a metal material such as stainless steel or steel, and includes an insertion portion 55 that is inserted into the mounting groove 46 of the sealing member 41, and a proximal end of the insertion portion 55. The large-diameter and large-diameter threaded portion 56 that is continuous to the side and the small-diameter threaded portion 57 that is continuous to the proximal end side of the large-diameter threaded portion 56 are integrally formed. In addition, an adhesive flow path 58 connected to the injector body 15 is formed at the axial center of the joint member 29, and the adhesive flow path 58 is connected to the first injection flow path 37 and the second injection flow path 52 as described above. Communicate. The insertion portion 55 is formed in a cylindrical shape having the same diameter as the mounting groove 46, and the adhesive flow path 58 and the respective injection flow paths 37 and 52 are communicated with each other by being inserted into the mounting groove 46. The large-diameter threaded portion 56 is formed in a cylindrical shape having a larger diameter than the insertion portion 55, and a male screw is threaded on the outer peripheral surface, and a pair of ground surfaces are ground flat on the outer peripheral surface proximal end side. A spanner hanging portion 59 is formed. A male screw is also threaded on the outer peripheral surface of the small-diameter threaded portion 57 so as to be threaded into the injector body 15. The inner diameter of the joint member 29 serving as the adhesive flow path 58 is configured to be larger than the diameters of the restricting portion 36 of the nozzle inner cylinder 25 and the retaining portion 51 of the nozzle outer cylinder 40.

  The fastening member 30 is formed in a cylindrical shape from a metal material such as stainless steel or steel, and is formed on the distal end side in connection with the large-diameter fastening portion 65 having the largest diameter in the injection nozzle 16 and the large-diameter fastening portion 65. And a small-diameter fastening portion 66. The inner diameter of the large-diameter fastening portion 65 is formed to be the same as that of the thick cylindrical portion 45 of the sealing member 41, and a female screw is engraved on the inner peripheral surface of the proximal end. The small diameter fastening portion 66 is formed so as to cover the cylindrical portion 44 of the sealing member 41, and the inner diameter thereof is also formed to be the same diameter as the cylindrical portion 44 of the sealing member 41. And the inner side step part of the large diameter fastening part 56 and the small diameter fastening part 57 engages with the outer side step part of the cylindrical part 44 and the thick cylinder part 45 of the sealing member 41, and the fastening member 30 is a joint member. The body main body 27 is held together with 29.

  As a result, the insertion portion 55 of the joint member 29 is inserted into the mounting groove 46 of the body main body 27 and the fastening member 30 is covered from the distal end side, and the male screw of the large-diameter threaded portion 56 of the joint member 29 and the fastening member 30. When the female screw of the small-diameter fastening portion 66 is screwed, the mounting groove 46 and the insertion portion 55 are brought into close contact with each other, and the adhesive flow path 58 and the injection flow paths 37 and 52 are connected. When the adhesive R flows from the injector main body 15 into the adhesive flow path 58 of the joint member 29, the adhesive R flows into the first injection flow path 37 from the restricting portion 36 of the nozzle inner cylinder 25, and outside the nozzle. The flow is diverted from the retaining portion 36 of the cylinder 40 to the flow into the second injection flow path 52 and discharged from the discharge port 35 and the leak port 50, respectively. In addition, since the nozzle inner cylinder 25 is formed in the length described above, it does not block the retaining portion 51 of the nozzle outer cylinder 40.

  Next, the anchor pin 70 will be described with reference to FIG. The anchor pin 70 is made of stainless steel or the like, and has a disk-shaped pin head 71 formed with a diameter larger than that of the opening of the insertion hole 8 and thin (0.3 mm to 0.5 mm), and a pin head. It is comprised from the rod-shaped pin trunk | drum 72 formed integrally with the part 71. FIG. The anchor pin 70 inserted into the insertion hole 8 has its pin head 71 in contact with the opening of the insertion hole 8, and the pin body 72 reaches the deepest part of the insertion hole 8.

  The pin body 72 is threaded with an external thread on its outer peripheral surface to increase the drawing strength, and is formed to have a diameter slightly smaller than the diameter of the insertion hole 8. The pin head 71 is colored by baking coating or the like so that the upper end surface, which is the top surface, matches the color of the finishing material 4.

  When the anchor pin 70 is inserted into the insertion hole 8, the pin body 72 anchors the concrete frame 2, the mortar 3, and the finishing material 4 via the adhesive R. The pin head 71 closes the opening of the insertion hole 8, and the top surface of the pin head 71 protrudes from the surface of the finishing material 4 by the thickness thereof, but is not flush with the finishing material 4. Because it is formed in, it will be inconspicuous. That is, the anchor pin 70 prevents the adhesive R from overflowing from the insertion hole 8, and the adhesive body R solidifies in this state, so that the pin body 72 is fixed to the insertion hole 8 via the adhesive R. Is done.

  Next, a pinning method for repairing the outer wall 1 using the above-described adhesive injector 10 will be described according to a construction procedure with reference to the process diagrams of FIGS. This pinning method includes a keying process for determining the drilling position (floating portion) of the insertion hole 8 by keying the outer wall 1, a drilling process for drilling the insertion hole 8 in the outer wall 1 at the drilling position, and an adhesive injection An adhesive injection process for injecting the adhesive R into the insertion hole 8 using the container 10 and a pin insertion process for inserting the anchor pin 70 into the insertion hole 8 into which the adhesive R has been injected. .

  In the keying process, the outer wall 1 is keyed using a hammer or the like, and the repaired portion of the outer wall 1 based on the keying sound, that is, the first floating portion 6 between the concrete frame 2 and the mortar 3, the mortar 3 and the finishing material 4 The second floating portion 7 is searched, and the drilling position of the insertion hole 8 is determined. Following this, the drilling position is appropriately marked at the drilling position.

  In the drilling process, each drilling position of the marked outer wall 1 is drilled using a drilling tool 75 such as a diamond core drill. That is, the concrete casing 2 is drilled to a predetermined depth so as to penetrate the finishing material 4 and the mortar 3 to form the insertion hole 8. At this time, perforation is performed at a right angle to the outer wall 1 and the perforation depth to the concrete frame 2 is 30 mm or more. Further, the insertion hole 8 is formed with a diameter (1 mm to 2 mm thick) so that the anchor pin 70 can be loosely fitted. Thereafter, since the chips and the like of the concrete housing 2 remain in the insertion hole 8, the chips and the like are removed by squirting with a blower or the like or sucking and cleaning with a vacuum dust collector or the like. However, this removal step is omitted when the chips flow out together with the cooling water.

  In the adhesive injection step, the injection nozzle 16 is inserted into the insertion hole 8 until the taper portion 43 of the body main body 27 comes into contact and the insertion depth is restricted, and the opening portion of the insertion hole 8 is inserted by the taper portion 43. Is sealed. In this state, the discharge port 35 of the nozzle inner cylinder 25 does not reach the deepest portion of the insertion hole 8, but in this state, the opening of the insertion hole 8 is pressed by the tapered portion 43, The lever 20 of the injector body 15 is operated (pumped) to inject the adhesive R into the insertion hole 8.

  When pumping is started, the nozzle inner cylinder 25 moves forward to the deepest part with respect to the body main body 27. When the tip of the nozzle inner cylinder 25 comes into contact with the deepest part of the insertion hole 8, the adhesive R is discharged from the discharge port 35 and gradually injected from the deepest part of the insertion hole 8. Eventually, it flows into the first floating portion 6 between the concrete housing 2 and the mortar 3, and at the same time, the adhesive R is also discharged from the leak outlet 50, and between the mortar 3 and the finishing material 4. It flows into the second floating part 7. At this time, air can accumulate in the insertion hole intermediate part between the first floating part 6 and the second floating part 7, but the air is generated by the negative pressure when the injection nozzle 16 is pulled out from the insertion hole 8. It will come out.

  In the pin insertion process, the insertion is performed while guiding the pin body 72 of the anchor pin 70 into the insertion hole 8 into which the adhesive R has been injected. The anchor pin 70 is inserted into the deepest portion so as to push the adhesive R in the insertion hole 8. Along with this, the adhesive R flows into the gap so as to fit the pin body 72, and a part thereof is pushed out toward the opening of the insertion hole 8. When the pin body 72 of the anchor pin 70 reaches the deepest part, the pin head 71 closes the opening of the insertion hole 8. In this case, in the adhesive injection step, the volume of the uninjected portion where the adhesive R generated after the nozzle inner cylinder 25 is pulled out is not injected is substantially the same as the volume of the anchor pin 70. Therefore, when the anchor pin 70 is inserted into the insertion hole 8, the insertion hole 8 can be substantially filled with the adhesive R without almost leaking the adhesive R from the insertion hole 8. Then, by curing in this state, the anchor pin 70 anchors the concrete casing 2, the mortar 3, the mortar 3 and the finishing material 4 with sufficient pulling strength via the adhesive R.

  As described above, according to the injection nozzle 16 of the present embodiment, it is inserted from the deepest part of the insertion hole 8 through the discharge port 35 continuous with the first injection flow path 37 and through the leak outlet 50 continuous with the second injection flow path 52. Adhesive R can be injected from the front side of the filling hole 8, so that the adhesive is sufficient for “floating” between the concrete frame 2 and the mortar 3 and between the mortar 3 and the finishing material 4. R can be injected (expands substantially circularly around the insertion hole 8). Therefore, the anchor pin 70 and the adhesive R can be effectively applied to the outer wall 1, and perfect repair of the outer wall 1 in which “floating” occurs can be performed.

  Next, a modification of the anchor pin in the pinning method according to the first embodiment will be described with reference to FIG. The anchor pin 80 is made of stainless steel or the like, and is integrally formed with a pin body portion 82 and a pin head portion 81 for holding the finishing material 4. In addition, a male screw is threaded on the outer peripheral surface of the pin body portion 82 to increase the pulling strength. The pin head 81 is formed in a dish shape and has a diameter somewhat larger than the opening diameter of the insertion hole 8 as in the first embodiment. That is, the pin head 81 has the same form as a head such as a countersunk screw (however, there is no groove for a tool) and can have sufficient strength. Further, the top surface of the pin head 81 is colored by baking coating or the like so as to match the color of the surface of the finishing material 4 as in the first embodiment.

  Here, the pinning method when the anchor pin 80 is used will be described. However, in the following description, it demonstrates focusing on a different part from 1st Embodiment. As in the first embodiment, first, the insertion hole 8 is drilled in the concrete housing 2 to a predetermined depth through the finishing material 4 and the mortar 3 with a drilling tool 75 such as a diamond core drill. Next, in correspondence with the shape of the pin head 81 of the anchor pin 80, the opening edge of the insertion hole 8 is chamfered into a dish-like shape. After chamfering, the inside of the insertion hole 8 is cleaned. Then, the adhesive R is injected into the insertion hole 8, and when the adhesive R reaches the first floating portion 6 and the second floating portion 7, the anchor pin 80 is inserted into the insertion hole 8. At that time, until the pin head 81 of the anchor pin 80 contacts the opening edge of the insertion hole 8, that is, the surface of the pin head 81 of the anchor pin 80 is flush with the surface of the finishing material 4. The anchor pin 80 is pushed in. Thereafter, curing is performed until the adhesive R is cured.

  According to this configuration, the pin head 81 of the anchor pin 80 is flush with the surface of the finishing material 4, and the pin head 81 of the anchor pin 80 is colored according to the finishing material 4. After that, the anchor pin 80 is extremely inconspicuous, and the design of the finishing material 4 is not impaired.

  Next, a second modification of the anchor pin will be described. As shown in FIG. 7C, the anchor pin 90 is made of stainless steel or the like, and is integrally formed with a pin body portion 92 and a pin head portion 91 for holding the finishing material 4. Further, a male thread is threaded on the outer peripheral surface of the pin body 92 to increase the pulling strength. The pin head 91 is formed in a circular cross section and has a diameter somewhat larger than the opening diameter of the insertion hole 8 as in the first embodiment. The top surface of the pin head 91 is colored by baking coating or the like so as to match the color of the surface of the finishing material 4 as in the first embodiment.

  Here, the pinning method in the case of using the anchor pin 90 will be described. First, an insertion hole 8 is drilled in the concrete casing 2 to a predetermined depth through the finishing material 4 and the mortar 3 by a drilling tool 75 such as a diamond core drill. In this case, a diamond core drill with an auxiliary bit attached is used, and the insertion hole 8 and the counterbore hole 94 having a diameter larger than that of the insertion hole 8 are formed simultaneously. Thereafter, the inside of the insertion hole 8 is cleaned, and then the injection nozzle 16 is inserted into the insertion hole 8, the taper portion 43 is pressed against the counterbore hole 94, and the adhesive R is injected into the insertion hole 8. When the adhesive R has spread over the first floating portion 6 and the second floating portion 7, the anchor pin 90 is inserted into the insertion hole 8. At that time, the anchor pin 90 is fixed so that the pin head 91 of the anchor pin 90 abuts against the counterbore 94, that is, the surface of the pin head 91 of the anchor pin 90 is flush with the surface of the finishing material 4. To push in. Thereafter, curing is performed until the adhesive R is cured.

  According to this configuration, the pin head 91 of the anchor pin 90 is flush with the surface of the finishing material 4, and the pin head 91 of the anchor pin 90 is colored according to the finishing material 4. Thereafter, the anchor pin 90 is extremely inconspicuous, and the design of the finish material 4 is not impaired.

  Next, another embodiment of the injection nozzle in the adhesive injector 10 of this embodiment will be described with reference to FIG. The injection nozzle 100 of the second embodiment includes a small-diameter nozzle inner cylinder 102 having a discharge port 101, a body main body 103 that holds the nozzle inner cylinder 102 so as to be movable forward and backward, and the body main body 103 as an injector main body 15. The joint part 104 is detachably attached to the joint part 104, and the fastening member 105 is attached to the joint part 104 in a fixed manner. Here, since the configuration is the same except for the body main body 103, the description is omitted. The body main body 103 is made of fluororubber and excludes the nozzle outer cylinder 40 of the first embodiment. In this case, the nozzle inner cylinder 102 is loosely inserted into the through hole 107 of the sealing member 106, and the second injection flow path 108 is configured by the gap between the nozzle inner cylinder 102 and the through hole 107. The through hole 107 in this case is formed to have substantially the same diameter as the inner diameter of the nozzle outer cylinder 40 of the first embodiment, and this through hole 107 forming portion constitutes the “inner cylinder holding portion” of the claims. Yes.

  When the body main body 103 is pressed against the opening of the insertion hole 8 using the injection nozzle 100, the outer peripheral surface of the taper portion 109 of the body main body 103 is brought into close contact with this, and the fluororubber is appropriately deformed to open the opening. Sealing is performed, and at the same time, the leakage port 110 faces a position closer to the front side than the second floating portion 7. At this time, since the fluororubber is solvent-resistant and hard, it is only slightly deformed by the pressing force of the operator, and the second injection channel 108 is not blocked. Therefore, like the injection nozzle 16 described above, the adhesive R reaches the first floating portion 6 and the second floating portion 7. Moreover, according to this structure, the number of parts can be reduced and it can be set as a simpler structure.

  The diameters (inner diameter and outer diameter) of the nozzle inner cylinders 25, 102 constituting the first injection flow path 37, the nozzle inner cylinders 25, 102 and the nozzle outer cylinder 40 constituting the second injection flow paths 52, 108, or It goes without saying that the size of the gap with the through hole 107 can be changed as appropriate.

It is a cross-sectional schematic diagram which uses the adhesive agent injection device which has the injection nozzle for the pinning method which concerns on one Embodiment of this invention with respect to the insertion hole formed in the outer wall. It is a top view of an adhesive injection device. (A) is a top view of an injection nozzle, (b) is sectional drawing of an injection nozzle. It is a top view of an anchor pin. (A) is a drilling process diagram of the pinning method according to the present embodiment, (b) is a first process diagram of an adhesive injection process, and (c) is a second process diagram. (A) is a 3rd process figure of an adhesive agent injection process, (b) is a 4th process figure, (c) is a 5th process figure. (A) is a pin insertion process diagram of an anchor pin, (b) is a pin insertion process diagram according to Modification Example 1 of the anchor pin, and (c) is a pin according to Modification Example 2 of the anchor pin. It is an insertion process figure. It is sectional drawing of the injection nozzle which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall 2 Concrete frame 3 Mortar 4 Finishing material 6 1st floating part 7 2nd floating part 8 Insertion hole 10 Adhesive agent injection device 15 Injection body 16 Injection nozzle 25 Nozzle inner cylinder 26 Nozzle body 27 Body main body 28 Mounting bracket 35 Discharge port 37 First injection channel 40 Nozzle outer cylinder 41 Sealing member 52 Second injection channel 58 Adhesive channel

Claims (7)

Used in the injector body,
In the injection nozzle for the pinning method that injects the adhesive while sealing the opening to the insertion hole drilled to the predetermined depth of the wall,
A nozzle body attached to the injector body and having an adhesive flow path connected to the injector body inside;
Inside the nozzle, which is held by the nozzle body in a state of protruding from the tip of the nozzle body, has a discharge port at the tip, and has a first injection channel that communicates the discharge port and the adhesive channel inside. A tube, and
A gap between the inner cylinder holding portion of the nozzle body that holds the nozzle inner cylinder and the nozzle inner cylinder forms a second injection flow path that is continuous with the adhesive flow path and that is open to the tip of the nozzle body. An injection nozzle for the pinning method characterized by that. The first injection channel and the second injection channel are:
In the initial stage of injection of the adhesive, the flow resistance of the adhesive flowing through the first injection flow path is configured to be smaller than the flow resistance of the adhesive flowing through the second injection flow path. The injection nozzle for the pinning method according to claim 1, wherein the injection nozzle is used. The nozzle body is
A body body that holds the nozzle inner cylinder and seals the opening of the insertion hole on the outer peripheral surface;
A mounting bracket for mounting the body body to the injector body, and
The injection nozzle for the pinning method according to claim 1 or 2, wherein the body body is made of an elastic material. The nozzle body is
A body body that holds the nozzle inner cylinder and seals the opening of the insertion hole on the outer peripheral surface;
A mounting bracket for mounting the body body to the injector body, and
The body body includes a nozzle outer cylinder that constitutes the inner cylinder holding portion, and a sealing member that includes the nozzle outer cylinder and seals the opening.
The nozzle outer cylinder is made of a hard resin material or a metal material,
The injection nozzle for the pinning method according to claim 1 or 2, wherein the sealing member is made of an elastic material.   The injection nozzle for the pinning method according to claim 3 or 4, wherein the elastic material is fluororubber.   The injection nozzle for the pinning method according to any one of claims 1 to 5, wherein the inner cylinder of the nozzle is held by the inner cylinder holding portion so as to freely advance and retract. The pinning which repairs the said wall body using the adhesive injection device which consists of the injection nozzle for the pinning construction methods in any one of Claim 1 thru | or 6, and the said injection device main body to which the said injection nozzle is detachably mounted | worn In the construction method,
A drilling step of drilling the wall body to a predetermined depth to form the insertion hole;
An adhesive injection step of injecting the adhesive into the insertion hole while sealing the opening of the insertion hole by the adhesive injector;
A pin insertion step of inserting an anchor pin into the insertion hole into which the adhesive has been injected;
A pinning method characterized by comprising

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