JP5749139B2 - Injection nozzle and pinning method using the same - Google Patents

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 connection arm having an adhesive flow path connected to the injector main body, a nozzle outer cylinder supported by the connection arm and having an intermediate flow path connected to the adhesive flow path inside, 2. Description of the Related Art A known example includes a nozzle inner cylinder that is supported by a cylinder so as to advance and retreat and has an adhesive discharge port connected to an intermediate flow path, and an operation rod for advancing and retracting the nozzle inner cylinder (Patent Document 1). reference). The operation rod and the nozzle inner cylinder are linearly connected, and are slidably supported by a sealing member provided at the tip of the nozzle outer cylinder and a tail end cap provided at the tail end.
In this pinning method using an injection nozzle, a hole is drilled in the repaired part of the outer wall made of finishing material (tile or stone), mortar and concrete frame, and then the resin with the injection nozzle installed in this hole. Injection of an adhesive (epoxy resin adhesive) is performed using an injector. Specifically, the nozzle inner cylinder is operated, the adhesive outlet is aligned with the bottom of the insertion hole, and the sealing member is pressed against the opening of the insertion hole to pump the injector body. Then, the adhesive flows from the injector body to the adhesive flow path in the connection arm, the intermediate flow path of the nozzle outer cylinder, the communication hole, and the nozzle inner cylinder, and is injected from the adhesive discharge port into the insertion hole. Injection of the adhesive into the insertion hole is performed from the deepest portion, and the operation rod is appropriately operated to inject the shallow portion while matching the discharge port with the gap.

JP 2007-46231 A

  In such a conventional injection nozzle, the adhesive can be injected from the deepest part of the insertion hole, so that no air accumulation or the like occurs in the deepest part of the insertion hole, and the adhesive is injected. Can do. However, in this type of pinning method, if the injection pressure (internal pressure) is low when the adhesive is injected into the insertion hole, the adhesive does not spread sufficiently to the “float” (void), while the injection pressure (internal If the pressure is high, the finishing material may be peeled off at the gaps. For this reason, in the conventional injection nozzle, in order to perform an appropriate injection | pouring operation | work, it had to rely on the skill level of the operator who operates an injector main body.

  An object of the present invention is to provide an injection nozzle capable of sufficiently injecting an adhesive at an appropriate pressure from a deep part to a shallow part of an insertion hole without skill, and a pinning method using the same. .

The injection nozzle of the present invention is used by being attached to the injector body, and the opening is sealed before the anchor pin is loaded into the insertion hole penetrating the finishing material and drilling the casing to a predetermined depth. An injection nozzle for a pinning method for injecting adhesive while stopping, having an intermediate flow path connected to the injector body and communicating with the injector body inside, and sealing an opening at the tip portion Nozzle outer cylinder having a sealing portion, a straight nozzle inner cylinder that is supported by the sealing portion so as to be able to advance and retreat, has a communication hole communicating with the intermediate flow path on the tail end side, and has an adhesive discharge port at the tip end portion And an operation rod connected to the tail end of the nozzle inner cylinder at the tip and supported so as to be able to advance and retreat on the tail end of the nozzle outer cylinder, and the connected nozzle inner cylinder and the operation rod are The internal pressure of the adhesive injected into the filling hole exceeds the specified value. When has an area difference of the pressure receiving surface for retracting the internal pressure, the nozzle outer cylinder is provided at the tail end, while permitting reciprocating movement of the operating rod, and a sealing ring sealing the intermediate passage The resistance adjustment unit can adjust the sliding resistance of the operating rod that moves forward and backward by crushing the sealing ring, and the resistance adjustment unit is provided with a memory that serves as a guide for internal pressure. It is characterized by that.

In this case, the resistance adjusting unit includes a ring receiver that holds the sealing ring, and an adjustment cap that sandwiches the sealing ring between the ring receiver and is screwed to the ring receiver. It is preferable that a memory is attached to at least one of the caps.

According to these configurations, when the adhesive is sent out from the injector body, the adhesive is injected into the insertion hole from the adhesive discharge port through the intermediate flow path of the nozzle outer cylinder, the communication hole, and the inside of the nozzle inner cylinder. The As the adhesive is injected, the pressure in the insertion hole increases, but when the internal pressure exceeds the specified value, the nozzle inner cylinder and the operating rod retract, so injection can be performed without increasing the pressure more than necessary. The end of the injection can be visually confirmed by the retraction of the operating rod. In other words, due to the difference in the area of the pressure receiving surface between the nozzle inner cylinder and the operating rod, the adhesive reaches the predetermined value of the internal pressure enough to “float” (gap), and the finishing material does not peel off at the gap. If it is set to about a level, the adhesive can be sufficiently injected at an appropriate pressure (internal pressure) from a deep portion to a shallow portion of the insertion hole. In addition, in the inner cylinder of the nozzle, the diameter when the average film thickness of the adhesive adhering to the outer peripheral surface is added is substantially matched with the diameter of the anchor pin. After injecting, the injector body is depressurized, the injection nozzle is pushed to the deepest part, and the injection nozzle is pulled out from the insertion hole to prevent excess adhesive from overflowing when the anchor pin is loaded. can do.
Further, the sliding resistance between the sealing ring and the operating rod can be adjusted. That is, the predetermined value of the internal pressure can be finely adjusted, and the adhesive can be injected with an appropriate internal pressure according to the width of the “floating” generated in the wall body.
In addition, the sealing ring is sandwiched between the adjustment cap and the ring receiver, but the sliding resistance between the operating rod and the sealing ring is adjusted by crushing the sealing ring (predetermined value of internal pressure) Fine adjustment).
Furthermore, the magnitude of the sliding resistance between the operating rod and the sealing ring can be confirmed with a memory, and the sliding resistance can be adjusted appropriately, so that the wall material is peeled off by pressure or the adhesive is “floating”. Can be avoided. The memory preferably displays the internal pressure directly.

  In this case, the sealing ring is preferably composed of an O-ring.

  According to this configuration, the present invention can be realized with a material that is relatively easy to obtain by selecting a material.

  The pinning method of the present invention is a pinning method for repairing a wall body made of a casing and a finishing material using an adhesive injector consisting of the above-described injection nozzle and an injector body equipped with the injection nozzle, A drilling step for penetrating the housing and drilling the housing to a predetermined depth to form an insertion hole; and an adhesive injection step for injecting an adhesive into the insertion hole while sealing the opening by an adhesive injector; And a loading step of loading an anchor pin for anchoring the finishing material into the housing in the insertion hole into which the adhesive has been injected.

  According to this configuration, the pressure of the insertion hole increases with the injection of the adhesive, but the nozzle inner cylinder and the operation rod are not connected to the nozzle inner cylinder and the operation rod when the internal pressure of the insertion hole exceeds a predetermined value. Since the rod is retracted by the internal pressure, the adhesive can be injected with an appropriate filling pressure. Therefore, it is possible to prevent a situation in which the wall material is peeled off by pressure or the adhesive is not sufficiently injected into “floating”.

  Another pinning method of the present invention is a pinning method for repairing a wall made of a casing and a finishing material by using an adhesive injector comprising the above-described injection nozzle and an injector body equipped with the injection nozzle. In the detection results of the drilling process that penetrates the material and drills the housing to a predetermined depth to form the insertion hole, the gap width detection process that detects the gap width of the gap generated in the wall, and the gap width detection process Based on the resistance adjustment step of adjusting the sliding resistance by the resistance adjustment unit, the adhesive injection step of injecting the adhesive into the insertion hole while sealing the opening by the adhesive injector, and the adhesive injection And a loading step of loading an anchor pin for anchoring the finishing material into the housing in the inserted hole.

  According to this configuration, the sliding resistance between the sealing ring and the operation rod can be adjusted according to the width of the gap ("floating") generated in the wall body, which is the detection result of the gap width detection process. Can do. That is, according to the properties of each insertion hole, the adhesive can be injected at an appropriate filling pressure, and the wall material is peeled off by the pressure or the adhesive is not sufficiently injected into the “float”. Can be prevented.

In these cases, the nozzle inner cylinder is formed so that the diameter when the average film thickness of the adhesive adhering to the outer peripheral surface is added substantially matches the diameter of the anchor pin . In the meantime, it is preferable to further comprise an adhesive recovery step of operating the pressure reduction of the injector body and advancing the injection nozzle to the deepest part of the insertion hole to recover excess adhesive from the insertion hole.

  According to this structure, the excess adhesive substantially equivalent to the volume of the anchor pin can be recovered from the insertion hole by the adhesive recovery step. For this reason, wasteful consumption of the adhesive can be suppressed, and excess adhesive can be prevented from overflowing when the anchor pin is loaded. Therefore, resource saving can be achieved, and the wiping operation (wiping process) of excess adhesive can be omitted.

It is sectional drawing of the state which is using the adhesive agent injection device which concerns on one Embodiment of this invention with respect to the insertion hole of an outer wall. It is a top view of an adhesive injection device. It is sectional drawing of the injection nozzle which concerns on embodiment. It is an enlarged view of the tail end sealing part of the injection nozzle which concerns on embodiment, (a) is sectional drawing, (b) is an external view, (c) is an exploded view. It is an enlarged view of the tail end sealing part of the injection nozzle which concerns on other embodiment, (a) is sectional drawing, (b) is an external view. It is the connection part of the nozzle inner cylinder which concerns on embodiment, and its enlarged view, (a) is the schematic around a connection part, (b) is an expanded sectional view of a connection part. It is explanatory drawing about the principle which a nozzle inner cylinder and an operation rod retract automatically with the injection nozzle which concerns on embodiment, (a) is a partial expanded sectional view of an injection nozzle, (b) is related to the pressure receiving surface of the force which acts in a retraction direction. Explanatory drawing, (c) is explanatory drawing regarding the pressure receiving surface of the force which works in a forward direction. It is a front view of the anchor pin loaded in the insertion hole. (A) is the figure showing the punching process of the pinning method which concerns on this embodiment, (b) is the figure showing the space | interval width detection process, (c) shows the 1st process of the adhesive agent injection process. FIG. (A) is the figure showing the 2nd process of the adhesive injection process, (b) is the figure showing the adhesive collection process, (c) is the figure showing the pin loading process of an anchor pin. .

  Hereinafter, based on an accompanying drawing, an injection nozzle concerning one embodiment of the present invention and a pinning method using the same are explained. 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 loaded 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 11 is used for the outer wall 1. As shown in the figure, the outer wall 1 of the building is composed of a concrete frame 2 as a foundation and a finishing material 3 applied to the surface from the left side of the figure. , And the decorative material 5 such as a tile or a stone stuck on this. In this case, it is assumed that the first floating portion 6 is generated between the concrete frame 2 and the mortar 4 and the second floating portion 7 is generated between the mortar 4 and the decorative material 5. Further, in order to repair this, the outer wall 1 is formed with an insertion hole 8 that penetrates through the decorative material 5 and the mortar 4 and perforates the concrete casing 2 to a predetermined depth. Then, the outer wall 1 is repaired by injecting the adhesive with the adhesive injector 11 and inserting the anchor pin 90 into the insertion hole 8.

  Here, the adhesive injector 11 will be briefly described with reference to FIG. The adhesive injector 11 is composed of a pump-type injector main body 21 that mainly supplies and supplies an adhesive, and a pinning method injection nozzle 22 that is detachably attached to the tip of the injector main body 21. Has been.

  The injector main body 21 includes a cylindrical casing 24 extending to the base end side, a pump main body 25 to which the casing 24 is detachably attached, a substantially “L” -shaped lever 26 held by the pump main body 25, and It has. The casing 24 is filled with an adhesive, and the casing 24 is set on the pump body 25 from the right side in the figure, and the injection nozzle 22 is mounted from the left side in the figure. The injector body 21 is configured to discharge the adhesive from the injection nozzle 22 by a certain amount by manually operating the lever 26. Although the check valve is originally incorporated in the discharge portion of the injector body 21, the check valve is removed in the embodiment. In addition, although the epoxy resin adhesive is used for an adhesive agent, it is not restricted to this, For example, various organic adhesives may be an inorganic adhesive which has viscosity from the first.

  As shown in FIG. 3, the injection nozzle 22 is supported by the connection arm 31 having one end portion detachably attached to the injector body 21 and formed in an “L” shape as a whole. A cylindrical nozzle outer cylinder 32, a straight nozzle inner cylinder 33 that is supported in the nozzle outer cylinder 32 so as to advance and retreat, and an operation rod 34 connected in series to the nozzle inner cylinder 33 are provided. The adhesive sent out from the injector main body 21 by pumping flows into the nozzle outer cylinder 32 through the connection arm 31, and is discharged from the nozzle outer cylinder 32 through the nozzle inner cylinder 33 from the tip thereof.

  The connection arm 31 is composed of an elbow-shaped stainless steel or steel pipe having an adhesive flow path 36 connected to the injector body 21 inside, and male threads for connection are formed at both ends. In this case, the connection arm 31 is firmly formed to transmit a pressing force that presses the tip of the nozzle outer cylinder 32 against the opening 14 of the insertion hole 8, and the nozzle outer cylinder 32 and the operation rod 34 are connected to the injector body. The length is adjusted so that it does not get in the way of 21 pumping.

  The nozzle outer cylinder 32 includes a cylindrical outer cylinder main body 41, a distal end sealing portion 42 attached to the distal end portion of the outer cylinder main body 41, and a tail end sealing portion attached to the tail end portion of the outer cylinder main body 41. 43, and the adhesive is sealed in the outer cylinder main body 41 by the tip sealing portion 42 and the tail end sealing portion 43. The nozzle inner cylinder 33 is inserted in the tip sealing portion 42 in a liquid-tight manner, and the operation rod 34 is inserted in the tail end sealing portion 43. Thus, the nozzle inner cylinder 33 and the operation rod 34 that are integrally connected to the nozzle outer cylinder 32 are configured to be able to advance and retract.

  The outer cylinder main body 41 is formed of a stainless steel or steel pipe, and an intermediate flow path 47 communicating with the adhesive flow path 36 is formed inside by the tip sealing portion 42 and the tail end sealing portion 43. Yes. Male screws for attaching the tip sealing portion 42 and the tail end sealing portion 43 are formed at both axial ends of the outer cylinder main body 41. Further, a boss portion 48 formed with a female screw protrudes (welds) at the front and rear intermediate positions of the outer cylinder main body 41, and one end of the connection arm 31 is connected to the boss portion 48 by screw joining. The boss portion 48 is formed with a flow passage opening 50 that communicates the intermediate flow passage 47 configured inside the outer cylinder main body 41 and the adhesive flow passage 36 of the connection arm 31.

  The front end sealing portion 42 includes a sealing member 51 that seals the outer cylinder main body 41, and a front end closing cap 52 that fixes the sealing member 51 so as to wrap around the front end portion of the outer cylinder main body 41. The sealing member 51 is formed so as to protrude from the tip closing cap 52. In addition, the “sealing portion” referred to in the claims includes a sealing member 51 and a tip closing cap 52.

  The sealing member 51 is made of a solvent-resistant elastic material such as fluorine rubber or butyl rubber, and has a tapered portion 54 that seals the opening 14 of the insertion hole 8 and a body portion that continues to the rear of the tapered portion 54. 55 and a flange portion 56 connected to the rear of the body portion 55 are integrally formed. The flange portion 56 is formed to have the same diameter as the inner diameter of the tip closing cap 52 (outer diameter of the outer cylinder main body 41), and the body portion 55 is formed to have the same diameter as the circular opening of the tip closing cap 52. Further, an insertion hole 44 through which the nozzle inner cylinder 33 is inserted in a liquid-tight and slidable manner is formed in the axial center of the sealing member 51.

  The distal end closing cap 52 has a circular opening through which the body portion 55 of the sealing member 51 passes, and is screwed into the outer peripheral surface of the distal end portion of the outer cylinder main body 41 in a state of including the flange portion 56 of the sealing member 51. ing. In this state, the flange portion 56 is strongly sandwiched between the tip closing cap 52 and the end surface of the outer cylinder main body 41, and the gap between the outer cylinder main body 41 and the tip closing cap 52 is sealed.

  As shown in FIGS. 3 and 4, the tail end sealing portion 43 includes an O-ring 61 that seals between the outer cylinder main body 41 and the operation rod 34, and a tail-end cap unit in which the O-ring 61 is incorporated ( Resistance adjusting unit) 62. The tail end cap unit 62 is screwed into the tail end portion of the outer cylinder main body 41 and holds the O ring 61, and the O ring 61 is sandwiched between the ring receiver 64 and the ring receiver 64. And an adjustment cap 65 to be screwed together.

  The ring receiver 64 is integrally formed with a large-diameter portion 64a screwed to the outer peripheral surface of the tail end of the outer cylinder main body 41 and a small-diameter portion 64b to which the adjustment cap 65 is screwed. A rod insertion hole 66 through which the operation rod 34 is inserted is formed. A reference memory 72 corresponding to a memory 71, which will be described later, is engraved on the large-diameter portion 64a, located above the outer peripheral surface. Further, an annular groove 67 in which the O-ring 61 is mounted is formed at the tail end portion of the small diameter portion 64b. In this case, the annular groove 67 is formed as a shallow groove in which the mounted O-ring 61 protrudes toward the adjustment cap 65, and the O-ring 61 is appropriately crushed by the adjustment cap 65 screwed into the ring receiver 64. It has become. As long as the O-ring 61 is crushed, the adjustment cap 65 may have the annular groove 67, or both the ring receiver 64 and the adjustment cap 65 may have the annular groove 67.

  The adjustment cap 65 is integrally formed with a cylindrical female screw portion 65a that is screwed into the small diameter portion 64b of the ring receiver 64 and a pressing plate portion 65b that presses the O-ring 61. A circular hole 69 through which the rod 34 is inserted is formed. When the adjustment cap 65 is screwed into the ring receiver 64, the O-ring 61 is compressed and the space between the outer cylinder main body 41 and the operating rod 34 is sealed. Further, by adjusting the screwing of the adjustment cap 65 to the ring receiver 64, the O-ring 61 is deformed and the sliding resistance of the operation rod 34 is adjusted.

  In order to adjust the sliding resistance, a memory 71 is engraved on the outer peripheral surface of the cylindrical female screw portion 65a. Although details will be described later, the sliding resistance due to the O-ring 61 is related to the filling pressure of the adhesive into the insertion hole 8 (predetermined value of the internal pressure), and although omitted in the drawing, the memory 71 is filled. Pressure value is attached. Then, the adjustment pressure is adjusted by rotating (screwing) the adjustment cap 65 and aligning the memory 71 with the reference memory 72 of the ring receiver 64. The ring receiver 64 may be provided with a memory 71 serving as a guide for filling pressure, and the adjustment cap 65 may be provided with a reference memory 72.

  Further, as another form of the tail end sealing portion 43, a structure as shown in FIG. According to this structure, the adjustment cap 65 covers the ring receiver 64. As a result, the screwed portion of the adjustment cap 65 and the ring receiver 64 is larger than the diameter of the outer cylinder, the strength of the tail end sealing portion 43 is increased, and the positional relationship between the memory 71 and the reference memory 72 is close. Therefore, the memory 71 is easy to read.

  On the other hand, as shown in FIG. 3, the nozzle inner cylinder 33 includes an inner cylinder main body 81 formed like a straight injection needle and a connecting portion 82 for connecting the inner cylinder main body 81 to the operation rod 34. . The inner cylinder main body 81 and the connecting portion 82 are made of a metal pipe such as stainless steel or a resin pipe. An adhesive discharge port 83 that is cut obliquely is formed at the tip of the inner cylinder main body 81, and an adhesive injection channel 86 is formed inside. Moreover, the tail end part of the inner cylinder main body 81 is formed in an expanded manner, and is locked in a retaining state with respect to the connecting part 82 (see FIG. 6). As will be described in detail later, the connecting portion 82 is formed with a pair of communication holes 85 that connect the injection flow path 86 and the intermediate flow path 47 of the nozzle outer cylinder 32. The adhesive in the intermediate flow path 47 flows through the injection flow path 86 from the pair of communication holes 85 and is injected from the adhesive discharge port 83 into the insertion hole 8.

  Further, the inner cylinder main body 81 is formed so that the diameter when the average film thickness of the adhesive attached to the outer peripheral surface is added substantially matches the diameter of the anchor pin 90. Further, the inner cylinder main body 81 (nozzle inner cylinder 33) has a forward position where the connecting portion 82 abuts against the tip sealing portion 42, and the connecting portion 82 is at the bottomed portion (tail end sealing portion 43) of the outer cylinder main body 41. It is configured to be movable back and forth (slidable) between the retreat position where it abuts. The nozzle inner cylinder 33 in the forward position has the adhesive discharge port 83 reaching the bottom of the insertion hole 8, and the nozzle inner cylinder 33 in the backward position has the adhesive discharge port 83 at the tip sealing portion 42. The length of the inner cylinder main body 81 is designed so as to slightly protrude from. Specifically, in order to correspond to the assumed deepest insertion hole 8, it is designed so that the projecting dimension from the distal end sealing portion 42 of the inner cylinder main body 81 at the advanced position is about 100 mm. The nozzle inner cylinder 33 has a diameter of 2 to 4 mm, for example.

  As shown in FIG. 6, the connecting portion 82 is formed in a columnar shape, and is connected to the inner cylinder mounting member 91 in which the tail end portion of the inner cylinder main body 81 is locked in a retaining state, and the inner cylinder mounting member 91. And a rod connecting member 92 to which the operation rod 34 is connected. The inner cylinder mounting member 91 is formed in a thick cylindrical shape, and has an annular locking portion 91a that locks the tail end portion of the inner cylinder main body 81 on the distal end side. Further, an internal thread portion 91 b into which the rod connecting member 92 is screwed is formed on the inner peripheral surface of the inner cylinder mounting member 91. Furthermore, an adhesive chamber 91c that is continuous with the injection flow path 86 of the inner cylinder main body 81 is formed between the annular locking portion 91a and the female screw portion 91b.

  A pair of communication holes 85 penetrating the inner cylinder mounting member 91 in the radial direction is formed so as to communicate the adhesive chamber 91c and the intermediate flow path 47. The adhesive that has passed through the intermediate channel 47 of the nozzle outer cylinder 32 flows into the adhesive chamber 91c through the pair of communication holes 85, and is guided from the adhesive chamber 91c to the injection channel 86 of the inner cylinder main body 81. The communication hole 85 may be one, or may be three or more. The shape is preferably circular or elliptical.

  The rod connecting member 92 has a male screw portion 92a screwed to the female screw portion 91b of the inner cylinder mounting member 91 on the tip end side, and a screw hole 92b screwed to the tip end portion of the operation rod 34 on the tail end side. .

  As shown in FIG. 3, the operation rod 34 includes a rod main body 95 and an operation knob 96 that is detachably attached to the tail end portion of the rod main body 95, and is connected to the rod by a male screw formed at the distal end portion of the rod main body 95. Screwed into the tail end of the member 92. When the operation knob 96 is held and the operation rod 34 is moved forward and backward, the nozzle inner cylinder 33 connected thereto moves forward and backward between the forward movement position and the backward movement position.

  Although details will be described later, in the injection nozzle 22 of this embodiment, when the nozzle inner cylinder 33 is pushed into the insertion hole 8 to start injection (pumping) of the adhesive, the adhesive gradually starts from the deepest portion of the insertion hole 8. When the pressure in the insertion hole 8 (and in the injection nozzle 22) exceeds a predetermined value, the nozzle inner cylinder 33 and the operating rod 34 are automatically retracted.

  Therefore, referring to FIG. 7, the principle of automatically retreating the nozzle inner cylinder 33 and the operation rod 34 and the adjustment method of the sliding resistance of the operation rod 34 by the adjustment cap 65 performed in connection therewith. explain.

  First, the principle that the nozzle inner cylinder 33 and the operation rod 34 are automatically retracted will be described. The force in the backward direction acting on the nozzle inner cylinder 33 and the operation rod 34 is obtained by multiplying the adhesive pressure Ps by the area receiving the pressure in the backward direction of the adhesive. In the present case, the area includes the area A1 obtained by subtracting the cross-sectional area of the inner cylinder main body 81 from the cross-sectional area of the connecting portion 82, the cross-sectional area A2 of the inner cylinder main body 81, and the disconnection of the injection flow path 86 of the inner cylinder main body 81. The area A3 is added and substantially corresponds to the cross-sectional area S1 of the connecting portion 82. Therefore, it can be seen that the force of S1 × Ps works in the backward direction with respect to the nozzle inner cylinder 33 and the operation rod 34.

  On the other hand, the forward force acting on the nozzle inner cylinder 33 and the operating rod 34 is obtained by multiplying the pressure Ps of the adhesive by the area of the surface receiving the pressure in the forward direction of the adhesive and the atmospheric pressure P to the atmospheric pressure P. It is the sum of the product multiplied by the area of the surface in the forward direction. Specifically, the pressure Ps from the adhesive is applied to the area B1 obtained by subtracting the cross-sectional area of the operating rod 34 from the cross-sectional area of the connecting portion 82, and the atmospheric pressure is applied to the cross-sectional area B2 of the operating rod 34. Assuming that the cross-sectional area of the operating rod 34 is S2 and the atmospheric pressure is P, it can be seen that a force of (S1−S2) × Ps + S2 × P acts on the nozzle inner cylinder 33 and the operating rod 34 in the forward direction.

  When the difference between the two is obtained, S1 * Ps-{(S1-S2) * Ps + S2 * P} = S2 * (Ps-P). Since the adhesive is injected by pumping, the pressure Ps of the adhesive is larger than the atmospheric pressure P. Therefore, S2 × (Ps−P) force (Fs) is applied to the nozzle inner cylinder 33 and the operating rod 34 in the backward direction. According to this equation, the force applied to the nozzle inner cylinder 33 and the operation rod 34 is proportional to the cross-sectional area of the operation rod 34 passing through the nozzle outer cylinder 32 and the difference between the adhesive filling pressure and the atmospheric pressure. I understand.

  On the other hand, in this case, the O-ring 61 is sandwiched between the ring receiver 64 and the adjustment cap 65 and is installed in a state of sealing between the outer cylinder main body 41 and the operation rod 34, and the frictional force is opposite to the movement direction. Fk is working. The frictional force Fk is expressed as Fk = μ × N (N is a vertical drag). Accordingly, the frictional force Fk can be changed depending on the friction coefficient μ, that is, the sliding resistance. By changing the sliding resistance due to the O-ring 61 and balancing the force Fs and the frictional force Fk that the nozzle inner cylinder 33 tries to move in the backward direction, the nozzle inner cylinder 33 and the operating rod 34 are automatically moved at an appropriate pressure. Therefore, the adhesive can be sufficiently injected into the insertion hole 8 with an appropriate pressure.

  Next, the anchor pin 90 will be briefly described with reference to FIG. The anchor pin 90 is made of stainless steel or the like, and has a disk-shaped pin head 101 formed with a diameter larger than that of the opening 14 of the insertion hole 8 and thin (0.3 mm to 0.5 mm), and a pin head. It is composed of a rod-shaped pin body portion 102 that is formed integrally with the portion 101 and is somewhat smaller in diameter than the diameter of the insertion hole 8. The anchor pin 90 inserted into the insertion hole 8 has its pin head portion 101 in contact with the opening edge of the insertion hole 8, that is, the surface of the decorative material 5, and the pin body portion 102 of the insertion hole 8. It reaches the deepest part. A male thread is threaded on the outer peripheral surface of the pin body portion 102 in order to increase the pulling strength, thereby forming a so-called full screw pin. Further, the pin head 101 is colored by baking painting or the like so as to match the color of the finishing material 3. Note that the pin head 101 may be formed in a dish shape. In such a case, a step of chamfering the opening 14 of the insertion hole 8 in accordance with the pin head 101 is added to the step of the pinning method described later. Similarly, the pin head 101 may be formed in a flat head shape having a diameter that matches the diameter of the counterbore. In such a case, a step of forming a counterbore hole in the opening 14 of the insertion hole 8 is added to the step of the pinning method described later.

  Next, with reference to FIG. 9 and FIG. 10, a pinning method for repairing the outer wall 1 using the adhesive injector 11 will be described according to a construction procedure. This pinning method is based on the results of the drilling step of drilling the insertion hole 8 in the outer wall 1 at the drilling position, the gap width detecting step of detecting the gap width and the number of voids generated in the outer wall 1, and the gap width detecting step. The tail end cap unit 62 is used to adjust the resistance of the sliding resistance, the adhesive injection step of injecting the adhesive into the insertion hole 8 using the adhesive injector 11, and the injector body 21. The pressure reducing operation is performed and the injection nozzle 22 is advanced to the deepest part of the insertion hole 8 to recover the excess adhesive from the insertion hole 8 and the insertion hole 8 into which the adhesive has been injected. And a pin loading step for loading the anchor pin 90.

  In the drilling step, the insertion holes 8 are drilled at the drilled positions of the marked outer wall 1 using a drilling tool 105 such as a diamond core drill. That is, the concrete casing 2 is drilled to a predetermined depth so as to penetrate the decorative material 5 and the mortar 4 to form the insertion hole 8. At this time, the outer wall 1 is perforated at a right angle, and the perforation depth of the concrete frame 2 is 30 mm or more. Further, the insertion hole 8 is formed in a straight hole having a larger diameter (1 mm to 2 mm thick) so that the anchor pin 90 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 suctioning and cleaning with a vacuum dust collector or the like. However, in the case of drilling using cooling water and the chips flowing out together with the cooling water, this removal step is omitted.

  In the gap width search step, the gap width is searched using an ear-pick-like search jig 106 or the like. That is, the exploration jig 106 is inserted into the insertion hole 8 and pulled by the hook portion 107 so as to trace the hole wall of the insertion hole 8. When there is a gap, the pressure transmitted to the finger from the side surface of the insertion hole 8 through the exploration jig 106 is reduced at the tip of the gap. Measure the depth at that time. Furthermore, when it is pulled so as to trace the hole wall, the hook portion 107 is caught at the tail end portion of the gap. The depth at this time is measured, and the gap width is measured based on the difference in depth between the tip and tail ends of the gap. Although not shown in the figure, a “pressure setting table” that shows the relationship between the gap width and the appropriate filling pressure (predetermined value of the internal pressure) is prepared, and the adjustment of the next process is performed based on the “pressure setting table”. Is done.

  In the resistance adjustment step, the adjustment cap 65 is rotated (screwed) based on the “pressure setting table”, and the filling pressure is finely adjusted according to the memory 71. In practice, the sealing cap (O-ring) 61 is crushed by rotating the adjustment cap 65, and the sliding resistance of the operating rod 34 is adjusted. As a result, the adhesive spreads enough to “float” the internal pressure according to the width of the gap (“float”) generated in the wall as a result of the above-described void width exploration step, and at the gap portion It is adjusted to an appropriate filling pressure such that the finishing material 3 or the like is not peeled off. As shown in FIG. 1, when there are a plurality of floating portions (the first floating portion 6 and the second floating portion 7), the proper filling pressure is set based on the widest floating portion.

  In the adhesive injection step, the advanced nozzle inner cylinder 33 is inserted into the insertion hole 8, abutted against the hole bottom, and the sealing member 51 is brought into contact with the opening 14 of the insertion hole 8, thereby The discharge dimension of the cylinder 33 is adjusted. Then, with the opening 14 sealed (pressed) by the tapered portion 54 of the sealing member 51, the lever 26 of the injector body 21 is operated (pumped) to inject the adhesive into the insertion hole 8. To go. When the pumping is started, the adhesive is discharged from the adhesive discharge port 83 of the nozzle inner cylinder 33, and the adhesive is injected from the deepest portion of the insertion hole 8. When the pressure in the insertion hole 8 and the injection nozzle 22 (adhesive filling pressure) exceeds the set appropriate filling pressure value, the nozzle inner cylinder 33 and the operating rod 34 are gradually retracted. Thereby, the adhesive including the floating portion is sufficiently injected from the deep portion to the shallow portion of the insertion hole 8 with an appropriate pressure.

  In the adhesive recovery process, the injector body 21 is depressurized and the inner cylinder body 81 is pushed to the deepest part of the insertion hole 8. Specifically, the lever 26 of the injector main body 21 is operated in the opening direction, and then the nozzle inner cylinder 33 (inner cylinder main body 81) is pushed into the deepest portion of the insertion hole 8 via the operation rod 34. Then, the adhesive of only the volume of the injected injection nozzle 22 is collected in the injector main body 21. After the adhesive is collected, when the injection nozzle 22 (nozzle inner cylinder 33) is pulled out from the insertion hole 8, the adhesive adhering to the outer peripheral portion of the injection nozzle 22 is carried out from the insertion hole 8. As described above, the inner cylinder main body 81 is formed such that the diameter when the average film thickness of the adhesive attached to the outer peripheral surface is added substantially matches the diameter of the anchor pin 90. Therefore, the volume of the adhesive carried out to the outside is substantially equal to the volume of the anchor pin 90.

  In the pin loading process, the pin body 102 of the anchor pin 90 is loaded while being guided into the insertion hole 8 into which the adhesive has been injected. The anchor pin 90 is loaded into the deepest portion so as to push away the adhesive in the insertion hole 8. Along with this, the adhesive flows into the gap so as to conform to the pin body 102. When the pin body 102 of the anchor pin 90 reaches the deepest part, the pin head 101 closes the opening 14. In the adhesive injection step, the volume of the non-injected portion where the adhesive generated after the nozzle inner cylinder 33 is pulled out is substantially the same as the volume of the anchor pin 90, so that the anchor pin is inserted into the insertion hole 8. When 90 is inserted, the insertion hole 8 can be substantially filled with the adhesive without almost leaking the adhesive from the insertion hole 8.

  As described above, according to the injection nozzle 22 of the present embodiment, the adhesive injection work is performed by pressing (sealing) the sealing member 51 of the nozzle outer cylinder 32 against the opening 14 of the insertion hole 8. In this case, since the sliding resistance of the operation rod 34 is adjusted by the tail end cap unit (resistance adjusting portion) 62, the nozzle inner cylinder 33 is moved forward while maintaining the inside at an appropriate pressure. The nozzle inner cylinder 33 can be automatically retracted without the rod 34 being retracted. Thereby, the adhesive can be sufficiently injected from the deep part of the insertion hole 8 to the shallow part (including the floating part). Moreover, since the injection | pouring nozzle 22 is finally inserted and the excess adhesive agent is collect | recovered, resource saving can be achieved and the wiping operation | work of an excess adhesive agent can be abbreviate | omitted.

  DESCRIPTION OF SYMBOLS 1 Outer wall 2 Concrete frame 3 Finishing material 8 Insertion hole 11 Adhesive injector 14 Opening part 21 Injector body 22 Injection nozzle 32 Nozzle outer cylinder 33 Nozzle inner cylinder 34 Operation rod 42 Tip sealing part 47 Intermediate flow path 61 O ring 62 Tail end cap unit 64 Ring receiver 65 Adjustment cap 71 Memory 83 Adhesive outlet 85 Communication hole 90 Anchor pin

Claims (6)

Used in the injector body,
This is an injection nozzle for the pinning method, in which an adhesive is injected into the insertion hole that penetrates the finishing material and the casing is drilled to a predetermined depth before the anchor pin is loaded. And
Said injector being connected to the body, which has an intermediate passage communicating with the syringe body internally, and the nozzle outer cylinder having a sealing portion for sealing the opening at the distal end,
Is movably supported by the sealing portion, and the nozzle inner cylinder of straight shape having an adhesive discharge opening in the distal end portion and having a communication hole communicating with the intermediate flow passage to the tail side,
Is connected to the tail end of the nozzle inner cylinder at the tip, and a supported operating rod retractably in the tail end of the nozzle outer cylinder,
Linked the nozzle inner cylinder and the operating rod, when the internal pressure of the injected adhesive to said charging hole exceeds a predetermined value, have a surface area difference of the pressure receiving surface receding by the internal pressure And
The nozzle outer cylinder is provided at the tail end portion, allows the operation rod to advance and retract, and seals the intermediate flow path, and crushes the sealing ring to advance and retract. A resistance adjusting portion capable of adjusting the sliding resistance of the operating rod.
The injection nozzle according to claim 1, wherein a memory that serves as a guide for the internal pressure is attached to the resistance adjusting unit . The resistance adjustment unit includes a ring receiver that holds the sealing ring, and an adjustment cap that sandwiches the sealing ring between the ring receiver and is screwed into the ring receiver.
The injection nozzle according to claim 1 , wherein the memory is attached to at least one of the ring receiver and the adjustment cap . The injection nozzle according to claim 1, wherein the sealing ring is an O-ring. Claims 1 using an adhesive injector made of said syringe body fitted with said injection nozzle and the injection nozzle according to any one of 3, was in pinning method for repairing a wall member made of a skeleton and finishing materials And
A piercing step of forming a charging hole by puncturing the penetrating and the precursor of the finishing material to a predetermined depth,
By the adhesive injector, the adhesive injection step of injecting the adhesive into the charging hole while sealing the opening,
The charging hole to which the adhesive is injected, pinning method which is characterized by comprising a loading step, the loading of the anchor pin for anchoring the finishing material to the precursor. Claims 1 using an adhesive injector made of said syringe body fitted with said injection nozzle and the injection nozzle according to any one of 3, was in pinning method for repairing a wall member made of a skeleton and finishing materials And
A piercing step of forming a charging hole by puncturing the penetrating and the precursor of the finishing material to a predetermined depth,
And the gap width detection step of detecting a gap width of the air gap occurring in the wall,
Based on the detection result of the gap width detection step, and the resistance adjustment step of adjusting the sliding resistance by the resistance adjusting unit,
By the adhesive injector, the adhesive injection step of injecting the adhesive into the charging hole while sealing the opening,
The charging hole to which the adhesive is injected, pinning method which is characterized by comprising a loading step, the loading of the anchor pin for anchoring the finishing material to the precursor. The nozzle inner cylinder is formed so that the diameter when the average film thickness of the adhesive attached to the outer peripheral surface is added substantially matches the diameter of the anchor pin,
Between the adhesive injection step and the loading step,
Wherein the syringe body as well as pressure reduction operation, by advancing the injection nozzle to the deepest of the charging hole, adhesives recovery step of recovering the excess adhesive from the charging hole, further comprising The pinning method according to claim 4 or 5 .

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