Injection nozzle and pinning method using the same

Abstract

To provide an injection nozzle or the like capable of appropriately advancing adhesive injection work with high operability while gradually restricting a nozzle inner cylinder.SOLUTION: This injection nozzle comprises: a nozzle outer cylinder 32 connected to an injector body 21 and having an intermediate passage 45 of an adhesive R communicated with the injector body 21 therein and a sealing member 51 for sealing an opening 11a at the tip; a nozzle inner cylinder 33 supported by the sealing member 51 so as to move back and forth and having a communication hole 77 communicated with the intermediate passage 45 at the tail end and a discharge port 75 of the adhesive R at the tip; an operation rod 34 connected at the tip to the tail end of the nozzle inner cylinder 33 and supported at the tail end of the nozzle outer cylinder 32 to move back and forth; and a position restriction mechanism 35 for enabling restriction of the position of the nozzle inner cylinder 33 within the range of back-and-forth movement by the operation rod 34.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an injection nozzle for a pinning method used for repairing a wall where "lifting" has occurred, and a pinning method using the same.

Background Art

[0002] Conventionally, as a pinning method using this type of injection nozzle, there is known a method for repairing a wall in which a stone material is attached via an adhesive material (mud plaster) to the surface of an extruded cement board base (Patent Document 1). This pinning method includes a drilling step of drilling an insertion hole so as to penetrate a part of the stone material and the extruded cement board base, and forming a countersunk portion at the opening of the drilled insertion hole; a mounting step of inserting and mounting a cylindrical body into the insertion hole; an injection step of injecting an adhesive into the insertion hole and the inside of the cylindrical body; and an insertion step of inserting an anchor pin into the insertion hole through the cylindrical body. In this case, the cylindrical body is formed by press punching a metal plate material and bending it into a cylindrical shape, and further closing the tip portion. A plurality of slit holes extending in the circumferential direction are formed in the cylindrical body. Also, a manual resin injector used for injecting the adhesive has a pump-type injector body, an injection nozzle attached to the injector body and configured to be able to move forward and backward, and a tapered sealing portion for sealing the opening of the insertion hole during injection. By inserting the injection nozzle to the tip of the cylindrical body and performing pumping, the adhesive fills the tip of the cylindrical body and eventually fills the entire inside. At that time, the adhesive flows out to the outside so as to ooze out from the cylindrical body through the slit holes. As a result, the flowed-out adhesive adheres so as to surround the cylindrical body, and a spacer-like column is formed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a conventional pinning method, if the injection of the adhesive is not performed while gradually retracting the injection nozzle to the tip of the cylindrical body, there is a problem that the shape of the adhesive surrounding the cylindrical body does not become a suitable columnar shape. In the injection operation in this case, the injection nozzle (nozzle body) that retracts by the reaction force of the injection pressure (pumping) is stopped at an appropriate position and pumping is performed. However, it is necessary to appropriately balance the stepwise stop positions and the number of pumping operations at each stop position. In particular, regarding the above-mentioned stop, since the finger of the hand holding the injector body is pressed against a part of the nozzle body, it is likely to be displaced and difficult to operate. Therefore, the form of the adhesive after injection (after discharge) may prevent the operator from visually recognizing it, and this operation requires skill.

[0005] An object of the present invention is to provide an injection nozzle that can appropriately and operably perform an adhesive injection operation that regulates the depth position of the discharge port of the nozzle inner cylinder step by step, and a pinning method using the same.

Means for Solving the Problems

[0006] The injection nozzle of the present invention is an injection nozzle for a pinning method that is attached to an injector body that supplies an adhesive and injects the adhesive while sealing the opening of an insertion hole drilled in a wall body. The injection nozzle is connected to the injector body, has an intermediate flow path for the adhesive that communicates with the injector body inside, and has a sealing member that seals the opening at the tip. The injection nozzle also includes a nozzle inner cylinder that is supported by the sealing member so as to be movable forward and backward, has a communication hole that communicates with the intermediate flow path at the tail end, and has an adhesive discharge port at the tip. The injection nozzle further includes an operation rod that is connected to the tail end of the nozzle inner cylinder at the tip and is supported by the tail end of the nozzle outer cylinder so as to be movable forward and backward, and a position regulating mechanism that can regulate the position of the nozzle inner cylinder within the range of forward and backward movement via the operation rod.

[0007] According to this configuration, with the sealing member of the nozzle outer cylinder directed at the insertion hole, the nozzle inner cylinder is advanced via the operation rod, and its tip is inserted to the innermost part of the insertion hole. In this state, the injector body is pumped, and the adhesive is supplied from the injector body to the intermediate flow path of the nozzle outer cylinder, guided from the communication hole to the nozzle inner cylinder, and discharged from the discharge port of the nozzle inner cylinder. In this way, the injection of the adhesive into the insertion hole is started. However, when a predetermined amount of the adhesive is injected with the nozzle inner cylinder in the advanced position, the nozzle inner cylinder is retracted to the next injection required location, and a predetermined amount of the adhesive is injected at this portion. The retraction (movement) of the nozzle inner cylinder and the injection of the adhesive are repeated several times to perform the injection of the adhesive into the insertion hole in consideration of the form of the wall body. At that time, the position regulating mechanism regulates the position of the nozzle inner cylinder for each injection required location. Thereby, a predetermined amount of the adhesive can be surely injected into the injection required location. Further, the operator does not need to hold down the operation rod during pumping at the injection required location, and the work can proceed with good operability.

[0008] In this case, the position regulating mechanism includes a regulating gauge member arranged along the operation rod and having a plurality of locking receiving portions arranged in the advancing and retreating direction of the operation rod, and a locking member provided at the tail end portion of the operation rod and configured to be capable of engaging and disengaging with respect to each locking receiving portion. It is preferable that the advancing and retreating movement of the operation rod is regulated when the locking member is locked to any one of the locking receiving portions, and the advancing and retreating movement of the operation rod is released from regulation when the locking is released.

[0009] According to this configuration, after moving the discharge port of the nozzle inner cylinder to the injection required location via the operation rod, the locking member provided at the tail end portion of the operation rod is locked to the locking receiving portion of the corresponding regulating gauge member. Thereby, the advancing and retreating movement of the nozzle inner cylinder is locked, and the discharge port of the nozzle inner cylinder is position-regulated to the desired injection required location.

[0010] In this case, an operation knob configured to move the operation rod forward and backward and to be rotatable about its axis is provided at the end portion of the operation rod. The regulation gauge member is formed in a strip shape with the arrangement of a plurality of locking receivers in a comb-tooth shape. The locking member is preferably constituted by a lock pin protruding from the outer peripheral surface of the operation knob and being engageable and disengageable with respect to each locking receiver by the forward and reverse rotation of the operation knob.

[0011] According to this configuration, the operation knob of the operation rod is rotated to lock the lock pin to the comb-tooth-shaped portion of the regulation gauge member. Thereby, the position of the discharge port of the nozzle inner cylinder is regulated to the location to be injected. Thus, since the plurality of locking receivers are in a comb-tooth shape and the locking member is a lock pin protruding from the operation knob, the position regulation mechanism can have a simple structure. Also, since the locking member can be engaged and disengaged with respect to each locking receiver by the forward and reverse rotation of the operation knob, the position regulation of the nozzle inner cylinder can be performed with good operability.

[0012] In this case, it is preferable that the regulation gauge member is provided with a dimension display portion for displaying the dimension from the position of the opening portion to the position of the discharge port in the nozzle inner cylinder during the injection of the adhesive, corresponding to the arrangement of the plurality of locking receivers.

[0013] According to this configuration, by retracting the nozzle inner cylinder while referring to the dimension display portion of the regulation gauge member and locking the locking member to the locking receiver, the position of the discharge port of the nozzle inner cylinder can be accurately regulated to the desired location to be injected.

[0014] The pinning method of the present invention is a pinning method for repairing a wall using an adhesive injector comprising the above-described injection nozzle and an injector body equipped with the injection nozzle. The method includes a drilling step of forming an insertion hole in the wall, a probing step of probing the shape of the wall in the depth direction through the insertion hole, an injection method determination step of determining an injection method comprising a plurality of restricted positions and the injection amount of the adhesive at each restricted position based on the result of the probing, an injection step of injecting the adhesive into the insertion hole by the adhesive injector based on the determined injection method, and an insertion step of inserting an anchor pin into the insertion hole into which the adhesive has been injected. In the injection step, within the range of the backward movement of the nozzle inner cylinder from the forward position where the tip abuts against the bottom of the insertion hole to the backward position where the tip is located near the opening of the insertion hole, a partial injection step consisting of locking of the locking member to the locking receiving portion, injection of the adhesive into the insertion hole, release of the locking of the locking member, and backward operation of the nozzle inner cylinder is repeated a plurality of times.

[0015] According to this configuration, since the adhesive is injected into the insertion hole based on the determined injection method, a predetermined amount of the adhesive can be surely injected into the location where injection is required. Further, the operator does not need to hold down the operation rod during pumping at the location where injection is required, and the work can be advanced with good operability.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0017] Hereinafter, with reference to the accompanying drawings, an injection nozzle according to an embodiment of the present invention and a pinning method using the same will be described. This pinning method involves inserting an injection nozzle of an adhesive injector from the opening into an insertion hole drilled in a portion to be repaired, such as the outer wall of a building where "lifting" has occurred, or the inner wall of a through-hole or hall (wall body), injecting an adhesive, and then inserting and filling an anchor pin to repair it.

[0018] In particular, the injection nozzle of the present embodiment is suitable for repairing wall bodies of stones or large tiles with a special tensioning form (dango tensioning). Specifically, it is suitable for repairing wall bodies with a board base in a steel frame building, that is, wall bodies with an extruded cement board base or a calcium silicate board base. Therefore, in the first embodiment, the case of repairing a wall body with an extruded cement board base will be described, and in the second embodiment, the case of repairing a wall body with a normal tile finish will be described.

[0019] [First Embodiment] FIG. 1 is a schematic view of a state in which a wall body of an extruded cement board base is repaired. As shown in the figure, the wall body 1 (existing) has a steel base 2 such as a channel material, an extruded cement board base 3 (board base) attached to the steel base 2, and a stone material 5 attached to the surface of the extruded cement board base 3 via an adhesive material 4. The extruded cement board base 3 is a thick panel body having a hollow portion 3a. In the present embodiment, the repair is performed in a form in which the stone material 5 is supported and fixed to the extruded cement board base 3.

[0020] The stone material 5 is attached to the extruded cement board base 3 in a so-called dango - attaching manner. Although not shown, five adhesive materials 4 are provided at intervals so as to be dispersed in the plane between the stone material 5 and the extruded cement board base 3. Further, a backup material 7 is provided between the stone materials 5 to form a joint 8. In the present embodiment, it is assumed that peeling ( "lifting") has occurred between the stone material 5 and the adhesive material 4 and between the adhesive material 4 and the extruded cement board base 3, and pinning is performed on the stone material 5 in the void region 9 where the adhesive material 4 is removed.

[0021] In this pinning method, first, an insertion hole 11 is formed so as to penetrate a part of the stone material 5 and the extruded cement board base 3 (up to the hollow portion 3a). Next, a cylindrical body 13 having a slit hole 13a is attached to the insertion hole 11 (details will be described later). Here, an adhesive R is injected into the insertion hole 11 (cylindrical body 13), and the adhesive R is allowed to flow out to the outside so as to ooze out from the cylindrical body 13 and adhere so as to surround the cylindrical body 13. Finally, an anchor pin 14 is inserted into the insertion hole 11 (cylindrical body 13) to complete the operation.

[0022] The cylindrical body 13 is formed by press - punching a thin metal plate and bending it into a cylindrical shape, and further closing the tip portion with a closing member 15. A plurality of slit holes 13a extending in the circumferential direction are formed in the cylindrical body 13. In the present embodiment, while using this cylindrical body 13 and moving an injection nozzle 22 (described later) step by step, the injection of the adhesive R is performed at a plurality of locations.

[0023] Here, with reference to FIG. 2, the adhesive injector 20 will be briefly described. As shown in the figure, the adhesive injector 20 is composed of an injector body 21 in the form of a pump that supplies the adhesive R, and an injection nozzle 22 for the pinning method that is detachably attached to the tip of the injector body 21.

[0024] The injector body 21 includes a cylindrical casing 24 that extends toward the proximal end side, a pump body 25 to which the casing 24 is detachably attached, and a substantially "L"-shaped lever 26 held by the pump body 25. The pump body 25 is attached with the casing 24 storing the adhesive R from the right side in the figure, and the injection nozzle 22 that discharges the adhesive R from the left side in the figure. The adhesive R is stored in the casing 24, and pressure is applied to the stored adhesive R by a spring so that it can be sent into the pump body 25.

[0025] By manually reciprocating (pumping) the lever 26, the pump body 25 performs a pumping action involving the opening and closing of the valve, sending the adhesive R to the injection nozzle 22 in a fixed amount and discharging it from the tip of the injection nozzle 22. Note that, although a two-component type epoxy resin adhesive is used for the adhesive R, it is not limited to this. For example, various organic adhesives, as well as inorganic adhesives having viscosity, etc., may be used.

[0026] As shown in FIGS. 2 and 3, the injection nozzle 22 includes a connection arm 31 with one end detachably attached to the injector body 21 and formed in an overall "L" shape, a cylindrical nozzle outer cylinder 32 held by the connection arm 31, a nozzle inner cylinder 33 in the form of an injection needle that is supported to be able to move forward and backward inside the nozzle outer cylinder 32, an operation rod 34 that is connected to the tail end of the nozzle inner cylinder 33 and moves the nozzle inner cylinder 33 forward and backward, and a position restricting mechanism 35 that can restrict the position of the nozzle inner cylinder 33 within the range of forward and backward movement via the operation rod 34. In this case, the nozzle inner cylinder 33 and the operation rod 34 are connected in series via a connection and communication mechanism 72 described later (see FIG. 3).

[0027] The adhesive R sent out from the injector body 21 by pumping flows into the interior of the nozzle outer cylinder 32 through the connection arm 31, flows from the interior of the nozzle outer cylinder 32 through the connection and communication mechanism 72 into the nozzle inner cylinder 33, and is further discharged from the tip thereof through the interior of the nozzle inner cylinder 33. This discharge is the injection of the adhesive R into the insertion hole 11, and the nozzle inner cylinder 33 is advanced and retracted by the operation rod 34 so as to match the injection required location of the insertion hole 11, and the advancing and retracting positions thereof are regulated (locked) by the position regulating mechanism 35.

[0028] The connection arm 31 is composed of a holder portion 37 that holds the nozzle outer cylinder 32 and a connection receiving portion 38 that extends perpendicularly from the end of the holder portion 37 and is connected to the injector body 21, and is made of stainless steel or steel. An adhesive flow path 39 that communicates the injector body 21 (pump body 25) and the nozzle outer cylinder 32 is formed inside the holder portion 37 and the connection receiving portion 38 that extend in an "L" shape. The holder portion 37 and the connection receiving portion 38 are configured to be detachable so that the internal adhesive flow path 39 can be easily cleaned.

[0029] The connection arm 31 is firmly formed to transmit the pressing force that presses the tip of the nozzle outer cylinder 32 against the opening 11a of the insertion hole 11, and holds the front portion of the nozzle outer cylinder 32. Further, the connection arm 31 adjusts the mutual positional relationship between the injector body 21 and the injection nozzle 22 so that the nozzle outer cylinder 32 and the operation rod 34 do not interfere with the pumping of the injector body 21 and so that the operation rod 34 can be easily operated while holding the injector body 21 (see Figure 2).

[0030] The nozzle outer cylinder 32 has a cylindrical outer cylinder main body 41, a tip sealing portion 42 attached to the tip portion of the outer cylinder main body 41, and a tail end sealing portion 43 attached to the tail end portion of the outer cylinder main body 41. The nozzle inner cylinder 33 is inserted through the tip sealing portion 42 in a liquid-tight manner at the axis, and the operation rod 34 is inserted through the tail end sealing portion 43 in a liquid-tight manner at the axis. Thereby, the integrally connected nozzle inner cylinder 33 and operation rod 34 are slidably supported by the nozzle outer cylinder 32.

[0031] The outer cylinder body 41 is formed in a cylindrical shape from stainless steel or steel. On the tip side, a male thread 41a at the tip portion where the tip sealing portion 42 is screwed is formed, and on the tail end side, a male thread 41b at the tail end portion where the tail end sealing portion 43 is screwed is formed. Inside the outer cylinder body 41 to which the tip sealing portion 42 and the tail end sealing portion 43 are attached, an intermediate flow path 45 communicating with the above-mentioned adhesive flow path 39 is configured. For this reason, at the front portion of the outer cylinder body 41, a flow path opening 46 communicating the adhesive flow path 39 and the intermediate flow path 45 is formed at a position corresponding to the holder portion 37 of the connection arm 31.

[0032] The tip sealing portion 42 includes a sealing member 51 for sealing the outer cylinder body 41 and a tip closing cap 52 for fixing the sealing member 51 so as to wrap around the tip portion of the outer cylinder body 41. The sealing member 51 seals the outer cylinder body 41 on the base side, while the tip side protrudes greatly from the tip closing cap 52 and slidably supports the nozzle inner cylinder 33.

[0033] The sealing member 51 is made of a solvent-resistant elastic material such as fluororubber or butyl rubber, and includes a tapered portion 54 for sealing the opening 11a of the insertion hole 11, a body portion 55 continuous with the rear of the tapered portion 54, and a flange portion (not shown) continuous with the rear of the body portion 55, which are integrally formed. By screwing the tip closing cap 52 onto the male thread 41a at the tip portion, this flange portion is inside the tip closing cap 52 and seals the tip portion of the outer cylinder body 41. Also, an insertion hole 56 through which the nozzle inner cylinder 33 is inserted in a liquid-tight and slidable manner is formed at the axial center of the sealing member 51.

[0034] The tail end sealing portion 43 includes a tail end closing cap 61 composed of a large-diameter cap portion 62 that screws onto the male thread 41b at the tail end portion and a cylindrical male-threaded small-diameter portion 63 that is continuous with the large-diameter cap portion 62, a small-diameter cap 64 that screws onto the small-diameter portion 63, a large-diameter O-ring 65 interposed between the end of the outer cylinder body 41 and the large-diameter cap portion 62, and a small-diameter O-ring 66 interposed between the end of the small-diameter portion 63 and the small-diameter cap 64. An operation rod 34 is slidably inserted through the inner peripheral surface of the small-diameter cap 64, and a male thread is formed on the outer peripheral surface.

[0035] When the tail end closing cap 61 is screwed onto the male thread 41b at the tail end portion of the outer cylinder body 41, the large-diameter O-ring 65 is deformed, and the space between the outer cylinder body 41 and the tail end closing cap 61 is sealed. Similarly, when the small-diameter cap 64 is screwed onto the small-diameter portion 63, the small-diameter O-ring 66 is deformed, and the space between the small-diameter portion 63 and the operation rod 34 is sealed. Also, in this state, the operation rod 34 is in slidable contact with the small-diameter O-ring 66, and the sliding resistance of the operation rod 34 can be adjusted according to the tightening degree of the small-diameter cap 64.

[0036] The sliding resistance of the operation rod 34 in this embodiment is adjusted so that when the inside of the insertion hole 11 reaches a predetermined injection pressure due to pumping (the pumping becomes difficult), the operation rod 34 and the nozzle inner cylinder 33 slowly retreat. Although details will be described later, in the injection operation, the fixing (locking) of the operation rod 34, the injection (pumping) of the adhesive R, and the backward movement of the operation rod 34 are repeated several times. This backward movement is automatically performed by the pumping (forward movement operation) after unlocking by adjusting the sliding resistance. Of course, it may be adjusted so that the operation rod 34 can be manually advanced and retracted.

[0037] The nozzle inner cylinder 33 is formed of steel, stainless steel, etc., and has an inner cylinder main body 71 formed in a straight injection needle shape, and a connection / communication mechanism 72 interposed between the inner cylinder main body 71 and the operation rod 34. The connection / communication mechanism 72 is composed of a block portion 72A on the inner cylinder main body 71 side and a joint portion 72B on the operation rod 34 side. The nozzle inner cylinder 33 and the operation rod 34 are connected coaxially and in series via this connection / communication mechanism 72.

[0038] Inside the inner cylinder main body 71, an injection flow path 74 for the adhesive R is formed, and at the tip of the inner cylinder main body 71, an ejection port 75 for the adhesive R connected to the obliquely cut injection flow path 74 is formed. The tail end of the inner cylinder main body 71 is joined so as to be inserted into the block portion 72A of the connection / communication mechanism 72, and the injection flow path 74 communicates with the block internal flow path 76 of the block portion 72A.

[0039] On the other hand, the joint portion 72B is provided at the tip of the operation rod 34 and is integrally formed with the operation rod 34. The nozzle inner cylinder 33 and the operation rod 34 are connected by screwing the male screw portion of the joint portion 72B integrally formed with the operation rod 34 into the female screw portion of the block portion 72A into which the inner cylinder main body 71 is inserted and joined.

[0040] The joint portion 72B is formed with two communication ports 77 that communicate the above-mentioned block internal flow path 76 and the intermediate flow path 45 of the nozzle outer cylinder 32. The adhesive R that has flowed into the intermediate flow path 45 of the nozzle outer cylinder 32 flows from the communication hole 77 through the block internal flow path 76 into the injection flow path 74 and is injected into the insertion hole 11 from the ejection port 75.

[0041] The operation rod 34 has a rod body 81 integrally provided with a joint portion 72B, and an operation knob 82 provided at the tail end portion of the rod body 81. The operation knob 82 is formed in a thick disk shape, and a lock pin 93 of a position restricting mechanism 35 described later is provided on the outer peripheral surface thereof. When the operation rod 34 is advanced and retracted by gripping the operation knob 82, the nozzle inner cylinder 33 directly connected thereto advances and retracts. Further, the operation knob 82 (and the rod body 81) is configured to be rotatable forward and backward about the axis.

[0042] Note that the integrally connected nozzle inner cylinder 33 and operation rod 34 are configured to be freely advanceable and retractable (slideable) between a forward end position where the block portion 72A abuts against the tip sealing portion 42 and a backward end position where the joint portion 72B abuts against the tail end sealing portion 43.

[0043] As shown in FIGS. 2 to 4, the position restricting mechanism 35 includes a restricting gauge member 91 disposed along the operation rod 34 and having a plurality of comb-shaped locking grooves 92 (locking receiving portions) formed therein, and a lock pin 93 (locking member) provided at the tail end portion of the operation rod 34 and configured to be engageable and disengageable with respect to each locking groove 92.

[0044] The restricting gauge member 91 has a gauge member main body 95 formed in a strip shape with a plurality of locking grooves 92 arranged in a comb shape, a fixing block 96 for fixing the gauge member main body 95 to the nozzle outer cylinder 32, and a dimension display portion 97 (see FIG. 4(c)) provided on the gauge member main body 95. The gauge member main body 95 is fixed (welded) to the outer peripheral surface of the rear portion of the nozzle outer cylinder 32 via the fixing block 96 and extends rearward along the operation rod 34.

[0045] A plurality of comb-shaped locking grooves 92 are formed in the gauge member main body 95 so as to be cut from above. In the present embodiment, for example, the groove width of the locking groove 92 is formed to be 2 mm in accordance with the lock pin 93, and the plurality of locking grooves 92 are arranged at a pitch of 3 mm. Therefore, the nozzle inner cylinder 33 can be position-restricted at a pitch of 3 mm within the range of its forward and backward movement.

[0046] A dimension display portion 97 for numerically displaying the dimension L from the position of the opening 11a in the nozzle inner cylinder 33 to the position of the discharge port 75 is provided below the comb-shaped portion of the gauge member main body 95. In this dimension display portion 97, the position of the locking groove 92 at the rear end (the right end in Fig. 4(c)) of the gauge member main body 95 is set as "0 mm", and numerical values are displayed at 15 mm intervals toward the front. In Fig. 4, the position from the end (0) of the locking groove 92 where the lock pin 93 is locked is "96", and L = 96 mm. Correspondingly, the dimension from the opening 11a of the insertion hole 11 to the discharge port 75 of the nozzle inner cylinder 33 is L = 96 mm.

[0047] The lock pin 93 is formed to have a diameter slightly less than 2 mm in accordance with the groove width of the locking groove 92 and protrudes from the outer peripheral surface of the operation knob 82. The lock pin 93 protruding radially from the operation knob 82 engages with and disengages from the locking groove 92 by rotating the operation knob 82 forward and backward around the axis. For example, as shown in Fig. 4, when there is a location to be injected at a position 96 mm from the opening 11a, the adhesive R is injected targeting this location. First, the operation knob 82 is grasped to advance and retract the operation rod 34, and the lock pin 93 is aligned with and locked in the locking groove 92 at 96 mm. Thereby, the nozzle inner cylinder 33 is restricted (locked) from advancing and retracting with its discharge port 75 facing the location to be injected. Here, if the adhesive R is injected, the location to be injected can be accurately filled with the adhesive R.

[0048] Next, with reference to FIGS. 5 to 7, the construction procedure in the pinning method using the above adhesive injector 20 will be described. This pinning method includes a drilling step of forming an insertion hole 11 in the wall body 1 (FIGS. 5(a) and (b)), a probing step of probing the shape of the wall body 1 in the depth direction through the insertion hole 11, an injection method determination step of determining an injection method consisting of a plurality of regulation positions and the injection amount of the adhesive R at each regulation position based on the result of the probing, an injection step of injecting the adhesive R into the insertion hole 11 by the adhesive injector 20 based on the determined injection method (FIGS. 5(c), 6(d) to (f), 7(g)), and an insertion step of inserting an anchor pin 14 into the insertion hole 11 into which the adhesive R has been injected (FIG. 7(h)).

[0049] The drilling step includes an actual drilling step of drilling the insertion hole 11 (FIG. 5(a)) and a countersinking step of forming a countersunk portion 11aa in the opening 11a of the insertion hole 11 (FIG. 5(b)). The injection step includes a mounting step of mounting the cylindrical body 13 in the insertion hole 11 (FIG. 5(c)) and an actual injection step of injecting the adhesive R into the insertion hole 11 with the cylindrical body 13 mounted (FIGS. 6(d) to 7(g)).

[0050] In the actual injection step, within the range of the backward movement of the nozzle inner cylinder 33 from the forward position where the tip abuts against the bottom of the insertion hole 11 to the backward position where the tip is located near the opening 11a of the insertion hole 11, a partial injection step consisting of locking of the lock pin 93 into the locking groove 92, injection of the adhesive R into the insertion hole 11, release of the locking of the lock pin 93, and backward operation of the nozzle inner cylinder 33 is repeated a plurality of times.

[0051] In the actual drilling step, the insertion hole 11 is drilled in the wall body 1 using a drilling device A. The drilling device A is configured by mounting, for example, a diamond bit Aa composed of a shank portion and a cutting edge portion on an electric drill. The diamond bit Aa is applied to the marked portion of the stone material 5, and the diamond bit Aa is rotated by the electric drill while supplying a coolant to perform drilling (see FIG. 5(a)). The drilling is performed at a right angle to the stone material 5 and penetrates the stone material 5 and also penetrates a part of the extrusion-molded cement board base 3 (up to the hollow portion 3a).

[0052] In the countersinking process, a spherical bit Ba having a spherical cutting edge portion (diamond) is attached to an electric drill, and the opening 11a of the insertion hole 11 is beveled with this spherical bit Ba to form a countersunk portion 11aa (see Fig. 5(b)). The spherical bit Ba is formed to have the same diameter as the head of the anchor pin 14, and the countersunk portion 11aa is formed in the manner of beveling.

[0053]

[0052] In the exploration process, although not particularly shown in the drawings, an ear-scraping-like exploration jig is used, and this exploration jig is inserted into the insertion hole 11 to explore the form of the wall body 1 in the depth direction. The exploration jig includes a shaft portion provided with a scale indicating the dimension from the opening 11a, and an "L"-shaped hook portion provided at the tip of the shaft portion. By hooking the hook portion on the constituent material of the wall body 1 and reading the scale at the same time, the depth position of the constituent material is explored. In the wall body 1 of the present embodiment, the depth position of the inner surface of the hollow portion 3a of the extruded cement board base 3, the wall thickness of the hollow portion 3a, the depth position of the outer surface of the extruded cement board base 3, the void dimension in the void region 9, the position of the inner surface of the stone material 5, and the thickness of the stone material 5 are explored.

[0054] In the injection method determination process, based on the above exploration results, an injection method consisting of a plurality of regulated positions (locking positions of the lock pin 93: L dimension) and the injection amount (pumping times) of the adhesive R at each regulated position is determined. The determining factor in the present embodiment is that the adhesive R oozing out from the cylindrical body 13 forms a reasonable form, that is, an anti-leakage-like adhesion form in the hollow portion 3a of the extruded cement board base 3, and a spacer-like (cylindrical) adhesion form in the void region 9. Therefore, in the present embodiment, the adhesive R is injected in four stages, that is, at four locations (locations to be injected), namely, the front position of the hollow portion 3a of the extruded cement board base 3, the back position of the void region 9, the middle position, and the front position.

[0055] The specific injection method is as follows: "In the first stage, the L dimension from the opening 11a to the discharge port 75 is 102 mm and the number of pumping operations is 3 times. In the second stage, the L dimension is 69 mm and the number of pumping operations is 5 times. In the third stage, the L dimension is 39 mm and the number of pumping operations is 3 times. In the fourth stage, the L dimension is 15 mm and the number of pumping operations is 4 times."

[0056] In the mounting process, the cylindrical body 13 is inserted from the opening 11a and mounted in the insertion hole 11. In this case, the cylindrical body 13 reaches the extrusion-molded cement board base 3 from the stone material 5 through the gap region 9 and is mounted so as to penetrate a part of the extrusion-molded cement board base 3 and reach the hollow part 3a (see Fig. 5(c)). That is, the cylindrical body 13 is mounted such that the plurality of slit holes 13a of the cylindrical body 13 face the stone material 5, the gap region 9, and the hollow part 3a.

[0057] In the actual injection process, based on the above injection method, the injection of the adhesive R (partial injection process) is carried out in four stages. In the injection process of the first stage, the sealing member 51 is abutted against the opening 11a of the insertion hole 11 and the nozzle inner cylinder 33 is advanced while holding the operation knob 82. By this advancement, when the locking pin 93 of the operation knob 82 reaches the position of the L dimension of 102 mm (the nozzle inner cylinder 33 abuts against the closing member 15 of the cylindrical body 13), it is tilted toward the regulating gauge member 91 side and locked in the locking groove 92. As a result, the discharge port 75 of the nozzle inner cylinder 33 faces the hollow part 3a of the extrusion-molded cement board base 3. Here, pumping is performed 3 times to carry out the injection of the adhesive R in the first stage (see Fig. 6(d)).

[0058] In the injection process of the second stage, the locking pin 93 is unlocked (locking is released), the nozzle inner cylinder 33 is retracted from the position of the L dimension of 102 mm to the position of the L dimension of 69 mm, and the locking pin 93 is locked in the locking groove 92. As a result, the discharge port 75 of the nozzle inner cylinder 33 faces the inner side position of the gap region 9. Here, pumping is performed 5 times to carry out the injection of the adhesive R in the second stage (see Fig. 6(e)).

[0059] In the injection process of the third stage, the lock pin 93 is unlocked (the locking is released), the nozzle inner cylinder 33 is retracted from the position of L dimension 69 mm to the position of L dimension 39 mm, and the lock pin 93 is locked in the locking groove 92. Thereby, the discharge port 75 of the nozzle inner cylinder 33 faces the middle position of the gap region 9. Here, pumping is performed three times to inject the adhesive R in the third stage (see Fig. 6(f)).

[0060] In the injection process of the fourth stage, the lock pin 93 is unlocked (the locking is released), the nozzle inner cylinder 33 is retracted from the position of L dimension 39 mm to the position of L dimension 15 mm, and the lock pin 93 is locked in the locking groove 92. Thereby, the discharge port 75 of the nozzle inner cylinder 33 faces the position in front of the gap region 9. Here, pumping is performed four times to inject the adhesive R in the fourth stage (see Fig. 7(g)).

[0061] In the insertion process, after the injection nozzle 22 is pulled out, the anchor pin 14 is inserted into the insertion hole 11 (cylindrical body 13). As the anchor pin 14 is inserted, when its head reaches the vicinity of the countersunk portion 11aa, the spatula C is abutted against the head, and the head is pushed in so that the surface of the head and the surface of the stone material 5 are flush, and the head is fitted into the countersunk portion 11aa (see Fig. 7(h)). Thereafter, curing is performed until the adhesive R hardens.

[0062] [Second Embodiment] Fig. 8 shows the case of repairing a general tiled wall body 101 (second embodiment). As shown in the figure, the wall body 101 is composed of a concrete structure 102 as a base and a finishing material 103 applied to its surface from the left side in the figure. The finishing material 103 is composed of mortar 104 and tiles 105 pasted thereon. In this case, it is assumed that a first floating portion 106 is formed between the concrete structure 102 and the mortar 104, and a second floating portion 107 is formed between the mortar 104 and the tiles 105. And in the wall body 101, an insertion hole 11 is formed that penetrates the tiles 105 and the mortar 104 and drills the concrete structure 102 to a predetermined depth for repairing it.

[0063] In this case, the injection method focuses on injecting the adhesive R from the innermost part of the insertion hole 11 and also sufficiently injecting the adhesive R into the first floating portion 106 and the second floating portion 107. As a result, in this actual injection process, the injection of the adhesive R is carried out in three stages (a total of three injection points). Note that in the second embodiment, since the cylindrical body 13 is not used, the mounting process is unnecessary. Also, the drilling process, the exploration process, the injection method determination process, and the insertion process are the same as those in the first embodiment, and the description thereof is omitted here. Here, mainly the injection process will be described.

[0064] In the injection process of the first stage, the sealing member 51 is abutted against the opening 11a of the insertion hole 11, and the nozzle inner cylinder 33 is advanced while holding the operation knob 82. By this advancement, when the locking pin 93 of the operation knob 82 reaches the position of the L dimension 117 mm (the nozzle inner cylinder 33 abuts against the bottom of the insertion hole 11), it is tilted toward the regulating gauge member 91 side and locked in the locking groove 92. Thereby, the discharge port 75 of the nozzle inner cylinder 33 faces the bottom of the insertion hole 11 formed in the concrete housing 102. Here, pumping is performed three times to carry out the injection of the adhesive R in the first stage. (See Fig. 8(a))

[0065] In the injection process of the second stage, the locking pin 93 is unlocked (the locking is released), the nozzle inner cylinder 33 is retracted from the position of the L dimension 117 mm to the position of the L dimension 39 mm, and the locking pin 93 is locked in the locking groove 92. Thereby, the discharge port 75 of the nozzle inner cylinder 33 faces the first floating portion 106. Here, pumping is performed five times to carry out the injection of the adhesive R in the second stage (see Fig. 8(b)).

[0066] In the injection process of the third stage, the locking pin 93 is unlocked (the locking is released), the nozzle inner cylinder 33 is retracted from the position of the L dimension 39 mm to the position of the L dimension 15 mm, and the locking pin 93 is locked in the locking groove 92. Thereby, the discharge port 75 of the nozzle inner cylinder 33 faces the second floating portion 107. Here, pumping is performed four times to carry out the injection of the adhesive R in the third stage (see Fig. 8(c)).

[0067] As described above, according to the present embodiment, in the injection step of injecting the adhesive R into the insertion holes 11 formed in the wall bodies 1 and 101, the retraction of the inner nozzle cylinder 33 is locked each time and is performed in multiple stages. That is, in accordance with the form of the wall bodies 1 and 101, the injection is carried out while adjusting the injection position and the injection amount of the adhesive R with respect to the insertion holes 11. Therefore, a predetermined amount of the adhesive R can be surely injected into the location to be injected, and ideal injection can be carried out as a whole. Further, the operator does not need to hold down the operation rod 34 during pumping at the location to be injected, and the work can be advanced with good operability.

Explanation of Reference Numerals

[0068] 1,101... wall body, 11... insertion hole, 11a... opening, 14... anchor pin, 20... adhesive injector, 21... injector body, 22... injection nozzle, 32... outer nozzle cylinder, 33... inner nozzle cylinder, 34... operation rod, 35... position regulating mechanism, 42... tip sealing portion, 43... tail end sealing portion, 45... intermediate flow path, 51... sealing member, 71... inner cylinder body, 72... connection / communication mechanism, 75... discharge port, 77... communication hole, 82... operation knob, 91... regulating gauge member, 92... locking groove, 93... lock pin, 95... gauge member body, 97... dimension display portion, R... adhesive

Claims

1. An injection nozzle for a pinning method that is used by being attached to an injector body that supplies an adhesive, and injects the adhesive while sealing the opening with respect to an insertion hole drilled in a wall body, a nozzle outer cylinder that is connected to the injector body, has an intermediate flow path for the adhesive that communicates with the injector body inside, and has a sealing member that seals the opening at the tip, a nozzle inner cylinder that is supported by the sealing member so as to be able to advance and retreat, has a communication hole that communicates with the intermediate flow path at the tail end, and has an adhesive discharge port at the tip, an operation rod that is connected to the tail end of the nozzle inner cylinder at the tip and is supported by the tail end of the nozzle outer cylinder so as to be able to advance and retreat, and a position restricting mechanism that can restrict the position of the nozzle inner cylinder within the range of forward and backward movement via the operation rod. The injection nozzle is characterized by comprising the above.

2. The position restricting mechanism is a restricting gauge member that is arranged along the operation rod and has a plurality of locking receiving portions arranged in the advancing and retreating direction of the operation rod, and a locking member that is provided at the tail end of the operation rod and is configured to be able to engage and disengage with each of the locking receiving portions. The injection nozzle according to claim 1, wherein the advancing and retreating movement of the operation rod is restricted when the locking member is locked to any one of the locking receiving portions, and the advancing and retreating movement of the operation rod is released from restriction when the locking is released.

3. An operation knob configured to be able to advance and retreat the operation rod and rotate around the axis is provided at the tail end of the operation rod, the restricting gauge member is formed in a strip shape with the arrangement of the plurality of locking receiving portions forming a comb shape, The injection nozzle according to claim 2, wherein the locking member is a lock pin that protrudes from the outer peripheral surface of the operation knob and can engage and disengage with each of the locking receiving portions by the forward and reverse rotation of the operation knob.

4. The injection nozzle according to claim 3, wherein the restricting gauge member is provided with a dimension display portion that displays the dimension from the position of the opening in the nozzle inner cylinder to the position of the discharge port during adhesive injection, corresponding to the arrangement of the plurality of locking receiving portions.

5. A pinning method for repairing a wall body using an adhesive injector comprising the injection nozzle according to any one of claims 2 to 4 and the injector body to which the injection nozzle is attached, a drilling step of forming the insertion hole in the wall body, a probing step of probing the form of the wall body in the depth direction through the insertion hole, An injection method determination step of determining an injection method composed of a plurality of regulation positions and the injection amount of the adhesive at each regulation position based on the result of the exploration; An injection step of injecting the adhesive into the insertion hole by the adhesive injector based on the determined injection method; An insertion step of inserting an anchor pin into the insertion hole into which the adhesive has been injected, and comprising: In the injection step, within the range of the backward movement of the nozzle inner cylinder from the forward position where the tip abuts against the bottom of the insertion hole to the backward position where the tip is located near the opening of the insertion hole, the locking of the locking member to the locking receiving portion, the injection of the adhesive into the insertion hole, the unlocking of the locking member, and the backward operation of the nozzle inner cylinder are repeated a plurality of times. The pinning method is characterized by repeating a partial injection process consisting of these steps.

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