Injector

Abstract

To provide an injector which can suppress excessive increase of a pressure.SOLUTION: An injector includes an injection mechanism having a connection port to which a feeder of a flowable repair material is connected, and an injection port which is mounted to face a repair object and injects a flowable repair material to the repair object, and a pressure accumulation mechanism which is branched between the connection port and the injection port in the injection mechanism, and compresses inside air by flowing the flowable repair material supplied thereto through the connection port, wherein the pressure accumulation mechanism includes a hollow container whose base end is provided on the injection mechanism and whose tip is open, a partition member which is slidably provided between the base end and the tip in the hollow container without looseness, and a lid body for airtightly sealing the tip of the hollow container. When the pressure in a pressurized space formed between the lid body and the partition member becomes a predetermined value or more, the partition member is configured to be detached from the hollow container.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to an injector for injecting a fluid repair material into a repair target such as a crack generated in a concrete structure, a wall, or the like.

Background Art

[0002] When repairing a crack that has progressed to the inside of a concrete structure or the like, it is necessary to slowly inject a liquid adhesive, which is a fluid repair material, while continuously applying a predetermined pressure.

[0003] For such a repair operation, an injection mechanism having a substantially cylindrical shape in which a grease gun or the like, which is a supply device for the adhesive, is connected to the proximal end side and an injection port on the distal end side is attached to a repair target such as a crack, and a pressure accumulation container that branches from the injection mechanism and in which the air inside is compressed and pressurized by the inflow of the fluid repair material are used.

[0004] By the way, when the present inventors actually investigated the usage mode of the injector at the site, they found the following problems.

[0005] Specifically, the high-pressure adhesive supplied from the grease gun to the injection mechanism does not initially flow into the pressure accumulation mechanism that branches from the injection mechanism, but instead flows into the crack from the injection port of the injection mechanism at high pressure as it is. For this reason, the original low-pressure injection by the pressure accumulation mechanism cannot be sufficiently realized.

[0006] In addition, for example, if the crack penetrates to the opposite side of the wall or if the wall is structurally weak like a plate, the adhesive may flow into the crack without limit. When the amount of the adhesive flowing into the crack without passing through the pressure accumulation mechanism increases in this way, it becomes impossible to accurately grasp how much adhesive has been used for repairing each crack. Then, the reliability of the repair work is impaired.

Prior Art Documents

Patent Document

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] By the way, for example, when small stones or the like are clogged inside the repair target and it is difficult to inject the adhesive, the operator can increase the pressure in the pressure accumulation mechanism to blow out the small stones or the like with the momentum of the adhesive to make it easier to inject. However, in such a case, there is a risk that, for example, excessive pressurization may prevent the realization of the target low-pressure injection. The present invention has been made in view of the above-described problems, and an object thereof is to provide an injector that enables an operator to notice that excessive pressurization is being performed to the extent that low-pressure injection becomes impossible.

Means for Solving the Problems

[0009] That is, the injector according to the present invention includes an injection mechanism including a connection port to which a fluidity repair material supplier is connected, and an injection port that is attached to face the repair target and injects the fluidity repair material into the repair target, and a pressure accumulation mechanism that branches between the connection port and the injection port in the injection mechanism, into which the fluidity repair material supplied through the connection port flows and the internal gas is compressed, and a flow path switching structure that communicates only between the supplier and the pressure accumulation mechanism when the supplier is connected to the connection port, and communicates between the pressure accumulation mechanism and the injection port when the supplier is removed from the connection port.

[0010] If it is such a thing, in the state where the supplier is connected to the connection port by the flow path switching structure, the fluidity repair material supplied from the supplier is surely stored in the pressure accumulation mechanism.

[0011] Therefore, for example, the fluidity repair material supplied at high pressure from a supplier such as a grease gun does not directly flow into the repair target from the injection port. Further, since the fluidity repair material is injected into the repair target from the injection port through the pressure accumulation mechanism, the pressure accumulation mechanism can realize an ideal injection pressure in the repair work. Furthermore, if the increase and decrease amount of the fluidity repair material in the pressure accumulation mechanism is confirmed, the amount of the fluidity repair material injected into the repair target can be accurately grasped.

[0012] In order to limit the flow direction of the fluidity modifier in the injector by attaching or detaching the feeder to / from the injector, the flow path switching structure includes a first flow path having a connection hole into which the tip of the feeder is fitted and a communication hole communicating with the pressure accumulation mechanism, and a second flow path through which the fluidity modifier extruded from the pressure accumulation mechanism and passing through the connection hole flows toward the injection port side of the injection mechanism in a state where the feeder is removed from the connection hole. It may be provided with such a structure.

[0013] In order to configure the flow path switching structure with a plurality of parts so that a complicated flow path structure as described above can be realized from a simple configuration, for example, by resin molding, the injection mechanism includes a cylindrical body having the communication hole formed on the side surface and communicating with the pressure accumulation mechanism, a flow path forming body inserted into the cylindrical body and forming the first flow path and the second flow path, and a check valve provided on the base end side of the cylindrical body and forming the connection port to which the feeder is connected. It may be provided with such a structure.

[0014] As a specific configuration example of the first flow path and the second flow path, the flow path forming body has a substantially cylindrical shape with a closed tip end, and includes an internal cavity having a connection hole opening at the base end side of the flow path forming body and a side opening opening on the side surface of the flow path forming body and connected to the communication hole of the cylindrical body, and a slot formed on the outer surface of the flow path forming body so as to extend in the axial direction. The internal cavity forms the first flow path, and the slot forms the second flow path between the inner surface of the cylindrical body.

[0015] In order to improve the assemblability by limiting the attachment direction of the flow path forming body to the cylindrical body in only one direction, it may further include an engaging portion formed between the flow path forming body and the cylindrical body to regulate the circumferential direction of the flow path forming body in the cylindrical body so that the side opening of the flow path forming body coincides with the connection hole of the cylindrical body.

[0016] In order to form the first flow path and the second flow path only by simple assembly work such that the flow path forming body is always arranged at a predetermined position within the cylinder, the engaging portion only needs to be such that it positions the axial position of the flow path forming body within the cylinder so that the outer opening and the communication hole coincide with each other.

[0017] In order to reduce the pressure of the fluidity repair material supplied from the accumulator mechanism to the injection port through the second flow path to a low pressure so as to satisfy the requirements of the recommended repair work, the accumulator mechanism includes a hollow container having a base end provided in the injection mechanism and a tip end opened, a partition member slidably provided without play between the base end and the tip end within the hollow container, a lid for airtightly sealing the tip end of the hollow container, and a movement restricting structure for restricting the movement of the partition member from the restricted position to the tip end side within the hollow container. In a state where the partition member is arranged at the restricted position, the pressurized space formed between the lid and the partition member has a predetermined capacity or more, and the pressure at which the partition member is pressed toward the base end side of the hollow container is configured to be a predetermined value or less.

[0018] For example, in order to make it easy to make the volume of the pressurized space a predetermined capacity or more while shortening the length of the hollow container protruding from the injection mechanism, it is sufficient that at least one of the partition member or the lid is formed with a relief recess for forming at least a part of the pressurized space.

[0019] In order to easily insert the partition member into the hollow container and easily form the movement restricting structure within the hollow container, the movement restricting structure only needs to be the tip end portion inserted into the hollow container in the lid, and the partition member abuts against the tip end portion of the lid and is arranged at the restricted position.

[0020] In order to make the pressure of the fluidity repair material injected from the accumulator mechanism into the repair target an ideal low pressure state required for repair work or the like, it is sufficient that the pressure at which the partition member is pressed toward the base end side of the hollow container is configured to be 0.4 MPa or less.

[0021] In order to accurately grasp the amount of the fluidity repair material injected into the object to be repaired via the accumulator, it is sufficient that the hollow container is provided with a scale indicating the amount of the fluidity repair material flowing into the injection container.

[0022] In order to make the limit position changeable and enable adjustment of the amount of the fluidity repair material injected into the object to be repaired via the accumulator, a screwing structure may be formed between the hollow container and the lid body, and it is sufficient that the lid body is attached to be retractable with respect to the hollow container.

[0023] In order to simplify the structure of the accumulator mechanism and reduce the manufacturing cost, it is sufficient that the lid body is fitted and fixed to the tip side of the hollow container.

[0024] In order to reduce the man-hours for assembly or the like for forming the flow path switching structure in the injector and further improve the manufacturability, it is sufficient that the flow path switching structure is integrally formed with at least a part of the accumulator mechanism by resin molding.

[0025] The injection mechanism includes a cylindrical body having a communication hole formed on a side surface thereof and communicating with the accumulator mechanism, a washer attached to a tip portion of the cylindrical body, a screw structure formed between the washer and the tip portion of the cylindrical body, and a loosening prevention structure formed between the washer and the tip portion of the cylindrical body and restricting movement of the washer in a direction of separating from the cylindrical body in a state where the washer is screwed to the cylindrical body. Even if the injector is shipped in a pre-assembled state or an impact or the like is applied during transportation, the screwing state between the washer and the cylindrical body can be made difficult to change, and it is possible to prevent the washer from coming off from the cylindrical body when pressure is applied during injection of the repair material.

Advantages of the Invention

[0026] According to the injector of the present invention as described above, the fluidity repair material supplied at high pressure from a feeder such as a grease gun can be prevented from directly flowing into the repair target from the injection port by the flow path switching structure. Further, since the fluidity repair material is injected into the repair target from the injection port via the pressure accumulation mechanism, the pressure accumulation mechanism can achieve an ideal injection pressure in the repair work. Furthermore, by checking the increase and decrease amount of the fluidity repair material in the pressure accumulation mechanism, the usage amount of the fluidity repair material for each repair target can be accurately grasped, so that the reliability of the repair work can be improved.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0028] The injector 100 according to the first embodiment of the present invention will be described with reference to the respective figures.

[0029] The injector 100 of the first embodiment is used for a repair operation of injecting an adhesive L as a fluid repair material into a crack AO, which is a repair target, formed in a concrete structure C or the like in civil engineering work or the like. More specifically, as shown in the perspective view of FIG. 1, the injector 100 is fixed to a portion where the crack AO opens on the outer surface in the concrete structure C, and mediates a cartridge of the adhesive set in a grease gun GG, which is a supply source of the adhesive L. Further, the components constituting this injector 100 are formed of resin without using metal, and the whole can be discarded as it is without sorting or the like after use.

[0030] This injector 100 is a portion that is attached perpendicularly to a concrete structure C or the like to be repaired, and includes an injection mechanism IN to which the grease gun GG is attached or detached, and a pressure accumulation mechanism TN that is branched and provided so as to be orthogonal to the injection mechanism IN, and is configured such that almost all of the adhesive L supplied from the grease gun GG flows into the inside and the gas G inside is compressed.

[0031] As shown in the perspective view of FIG. 1, the injection mechanism IN is a thin cylindrical portion in this injector 100, and a connection port CP to which a nozzle NZ of a grease gun GG, which is a supplier of the adhesive L, is connected is formed at the proximal end, and is attached to face the crack AO at the distal end, and an injection port IP for injecting the adhesive L into the crack AO is formed.

[0032] More specifically, as shown in each exploded view of FIG. 2, the injection mechanism IN includes a washer 1 having an injection port IP formed therein and attached to a concrete structure C having a crack AO, a cylinder 2 having a tip attached to the washer 1 and a hollow container 4 connected to a side surface thereof, and a check valve 3 inserted into a proximal end side of the cylinder 2 and forming a connection port CP.

[0033] The washer 1 includes a thin disk portion 11 having an injection port IP opened at a central portion thereof, and a cylindrical portion 12 surrounding the injection port IP and protruding perpendicularly to an upper surface of the thin disk portion 11. An outer peripheral portion of a lower surface of the thin disk portion 11 is adhered and fixed to a surrounding wall surface where the crack AO is opened by a fixing material F. This fixing material F exhibits strong viscosity in a compression or tensile direction, but exhibits weak viscosity in a shear direction. Therefore, when removing the injector 100 after injecting the adhesive L into the crack AO, it can be easily removed by moving it in a direction along the surface of the wall. The cylindrical portion 12 is hollow and has an internal thread for screwing with the cylinder 2.

[0034] The cylinder 2 is a hollow cylindrical shape thinner than the cylindrical portion 12 as shown in FIGS. 2(b), 3, and 4, and a pedestal portion 23 is formed at a proximal end side thereof, on which a flange portion 31 formed in a flat disk ring shape in the check valve 3 is disposed. And the check valve 3 is accommodated inside this cylinder 2. Further, a cover CV is attached so as to sandwich a flange portion formed above the check valve 3 from above the pedestal portion 23. The cover CV and the cylinder 2 are formed of the same kind of hard resin, and are formed of a material different from the soft resin constituting the check valve 3. Also, the cover CV is fixed to the pedestal portion 23 by ultrasonic welding. Since the cover CV and the pedestal portion 23 are formed of the same resin material, they can be fixed more firmly as compared with the case where ultrasonic welding is performed between different kinds of resin materials. Therefore, even when the internal pressure of the injection mechanism IN rises during the injection of the adhesive L, the cover CV strongly presses the check valve 3, so that the check valve 3 can be prevented from expanding outward.

[0035] In addition, a male thread 21 that engages with the cylindrical portion 12 is cut on the outer peripheral surface at the tip of the cylindrical body 2. Further, as shown in the cross-sectional views of FIGS. 2(b), 3, 4, and 5, the cylindrical body 2 is at the central portion of its side surface, and a communication hole 22 that communicates with the inside of the pressure accumulation mechanism TN is formed near the tip in a state where the check valve 3 is accommodated. As shown in FIG. 2(b), the upper end portion of the communication hole 22 is formed to be located below the tip portion of the check valve 3 inserted into the cylindrical body 2. In other words, in a state where the check valve 3 is inserted into the cylindrical body 2, the outer peripheral portion on the tip side of the check valve 3 faces the inner wall surface of the cylindrical body 2.

[0036] The inside of this cylindrical body 2 is configured to taper from the base end side toward the tip end side, and is configured such that when the adhesive hardens inside the cylindrical body 2, it cannot be taken out from the tip end side. Further, since the cover CV is ultrasonically welded to the pedestal portion 23, the hardened adhesive cannot be taken out from the base end side either. If the check valve 3 is forcibly removed from the cylindrical body 2, the check valve 3 will not be fixed and its function will not be exerted, so that pressure cannot be applied to the adhesive and injected into the crack AO from the cylindrical body 2. Therefore, if the remaining adhesive in the cylindrical body 2 is left to harden, the injector 100 cannot be reused, and it is possible to prevent low-quality repair work from being carried out by injecting into the crack AO in a state where the old adhesive and the new adhesive are mixed.

[0037] Furthermore, as shown in FIGS. 3 to 6, the injector 100 of the present embodiment is provided with a flow path switching structure SW that switches the direction in which the adhesive L in the injector 100 can flow by attaching or detaching the grease gun GG by means of a substantially cylindrical flow path forming body 9 inserted into the central portion of the cylindrical body 2.

[0038] As shown in FIGS. 3 and 5(a), in this flow path switching structure SW, when the grease gun GG is connected to the connection port CP, only the space between the grease gun GG and the pressure accumulation mechanism TN is communicated, and the adhesive L flows only from the grease gun GG into the hollow container 4 of the pressure accumulation mechanism TN. That is, in this state, the flow path from the grease gun GG to the injection port IP is blocked.

[0039] The respective parts forming the flow path switching structure SW will be described in detail.

[0040] As shown in FIGS. 3 to 5, the flow path forming body 9 is inserted into the central portion of the cylindrical body 2 where the communication hole 22 opens on the side surface, and is disposed immediately below the tip of the check valve 3. As shown in each figure, the flow path forming body 9 has a substantially hollow cylindrical shape with its tip side closed and its base end side open. That is, as shown in each cross-sectional view, the flow path forming body 9 includes an internal cavity 91 in which a lateral hole extending orthogonally to the hollow portion extending in the axial direction is formed, and the lateral hole of the internal cavity 91 forms a side opening 93 with respect to the flow path forming body 9. This side opening 93 communicates with the communication hole 22 of the cylindrical body 2.

[0041] As shown in FIGS. 3 and 5(a), the connection hole 92 opening at the base end side of the flow path forming body 9 fits with the tip of the nozzle NZ of the grease gun GG. The nozzle NZ is configured to be detachable from the grease gun GG, and the outer diameter dimension of its tip is set so as to be paired with the connection hole 92 of the flow path forming body 9. In other words, the nozzle NZ is specially designed to be paired with the flow path forming body 9, and by attaching the nozzle NZ, the injector 100 of the present embodiment can be used with any type of grease gun.

[0042] The flow path from the connection hole 92 of the flow path forming body 9 to the communication hole 22 of the cylindrical body 2 is the first flow path L1. When the grease gun GG is connected to the connection port CP, the tip of the nozzle fits with the connection hole 92 of the flow path forming body 9 with almost no gap. Therefore, when the adhesive L is injected from the grease gun GG, the adhesive L hits the inner bottom surface of the flow path forming body 9, and then the adhesive L flows into the pressure accumulation mechanism TN through the lateral hole and the communication hole 22. When the grease gun GG is connected to the connection hole CP, the connection hole 92 is covered by the nozzle NZ, so the flow path from the grease gun GG to the injection port IP is blocked in the injection mechanism IN. Therefore, the entire amount of the adhesive L can be made to flow only into the pressure accumulation mechanism TN through the first flow path L1.

[0043] As shown in FIGS. 4 and 5(b), when the grease gun GG is removed from the connection port CP and the tip of the nozzle NZ comes off from the connection hole 92 of the flow path forming body 9, the adhesive L extruded from the pressure accumulation mechanism TN and passing through the connection hole 92 of the flow path forming body 9 flows toward the injection port IP side of the injection mechanism IN through the slot 94 formed on the outer surface of the flow path forming body 9, thereby forming a second flow path L2.

[0044] As shown in FIGS. 6(a) and 6(b), two slots 94 extending in the axial direction are provided on the outer surface of the flow path forming body 9, and a gap is formed between the outer surface of the flow path forming body 9 and the inner peripheral surface of the cylindrical body 2. After the adhesive L extruded from the pressure accumulation mechanism TN flows out of the connection hole 92 of the flow path forming body 9 to the outside, it hits the check valve 3 in the closed state, and then flows through the slot 94 on the outer surface of the flow path forming body 9 toward the tip side of the cylindrical body 2. Note that at least a part of the portion where the slot 94 is not formed on the outer surface of the flow path forming body 9 forms a part of a cylinder having the same diameter so as to substantially fit with the inner peripheral surface of the cylindrical body 2.

[0045] In this way, when the grease gun GG is attached to the injector 100, the adhesive L can only flow through the first flow path L1, and the adhesive L will not be injected from the injection port IP to the repair target without passing through the pressure accumulation mechanism TN. Also, when the grease gun GG is removed from the connection port CP, the adhesive L can be injected into the repair target through the second flow path L2 formed by the slot 94 on the outer surface of the flow path forming body 9.

[0046] Furthermore, an engaging portion LK for restricting the circumferential direction of the flow path forming body 9 in the cylinder is formed between the outer surface on the tip side of the flow path forming body 9 and the inner surface on the lower side of the communication hole 22 in the cylinder body 2. Specifically, as shown in FIG. 6(c), a concave portion 95 having a right angle is formed in the flow path forming body 9, and a right-angled corner portion 24 corresponding to the concave portion 95 is formed on the inner circumferential surface of the cylinder body. More specifically, the flow path forming body 9 has a concave portion 95 formed by notching a part of the outer surface on the tip side at a right angle. The concave portion 95 is composed of a first horizontal surface 951 and a first standing surface 952 provided so as to extend in the axial direction with respect to the first horizontal surface 951, as shown in FIG. 6. On the other hand, in the cylinder body 2, the lower side of the communication hole 22 has a corner portion 24 formed by protruding inward at a right angle instead of a curved surface for a part of the inner circumferential surface, as shown in the cross-sectional view of FIG. 3(b). This corner portion 24 is composed of a second horizontal surface 241 and a second standing surface 242 which is a surface extending in the axial direction of the cylinder body 2 with respect to the second horizontal surface 241. The flow path forming body 9 is configured such that it can be inserted into the cylinder body 2 only up to the state where the first horizontal surface 951 and the second horizontal surface 241 coincide. That is, the engaging portion LK positions the insertion position of the flow path forming body 9 in the cylinder body 2 at the position where the communication hole 22 and the internal cavity 91 communicate with each other by these pair of opposing flat surfaces. Also, a predetermined distance is provided between the first standing surface 952 and the second standing surface 242. This separation distance is set within a range in which the first standing surface 952 and the second standing surface 242 do not interfere even if the flow path forming body 9 rotates in the circumferential direction in the cylinder body 2, and the state where the side opening 93 and the communication hole 22 communicate with each other is maintained. In this way, the flow path forming body 9 is configured such that it can be pushed in all the way only when the directions of the concave portion 95 and the corner portion are substantially the same in the cylinder body 2.

[0047] Next, the accumulator mechanism TN will be described.

[0048] The pressure accumulation mechanism TN corresponds to the thick cylindrical portion in the injector 100 as shown in FIGS. 1 and 2. It includes a cylindrical hollow container 4 with its base end attached to the injection mechanism IN and an open tip, a partition member 5 slidably provided without play between its base end and tip inside the hollow container 4, and a lid 6 that airtightly seals the tip of the hollow container 4. That is, this pressure accumulation mechanism TN is composed of two divided parts, the hollow container 4 and the lid 6. Also, the hollow container 4 is integrally formed as one part in a state combined with the cylindrical body 2. Furthermore, the hollow container 4 is provided so as to be orthogonal to the cylindrical body 2, and the base end of the cylindrical body 2 and the side surface on the anti-crack side of the hollow container 4 are at substantially the same height when viewed from the crack AO.

[0049] Also, in this embodiment, a screwing structure 7 composed of a male screw 71 and a female screw 72 is formed between the outer peripheral surface on the tip side of the hollow container 4 and the lid 6, and the lid 6 is configured to be able to move forward and backward in the axial direction with respect to the hollow container. Therefore, by rotating the lid 6, the protruding amount of the lid 6 inside the hollow container 4 can be changed, and the pressure of the gas between the partition member 5 and the lid 6 inside the hollow container 4 can be pressurized or depressurized.

[0050] The hollow container 4 is a cylinder configured with a transparent resin having a generally hollow cylindrical shape so that its interior can be seen through. As shown in FIGS. 1 and 2, graduations are marked on the outer peripheral surface of this hollow container 4 from the base end side to the tip end side so that the amount of the adhesive L flowing into the hollow container 4 from the injection mechanism IN can be visually recognized. Also, a male screw 71 to which the lid 6 is attached is formed on the tip side of this hollow container 4.

[0051] The partition member 5 is hermetically fitted to the inner peripheral surface of the hollow container 4 and is a substantially flat solid cylindrical piston having a diameter substantially the same as the inner diameter of the hollow container 4. This partition member 5 is attached so as to be in a state of being substantially in contact with the base end of the hollow container 4 at the start of injection. When the injection of the adhesive L is started by the grease gun GG connected to the injection mechanism IN and the adhesive L also enters the hollow container 4, it is configured to move toward the tip side of the hollow container 4. At this time, since the inside of the hollow container 4 is partitioned by the partition member 5, only the gas G exists on the tip side inside the hollow container 4, and the adhesive L exists only on the base end side inside the hollow container 4. That is, the gas G enclosed in the hollow container 4 does not leak into the adhesive L on the injection mechanism IN side because of the partition member 5.

[0052] Also, regarding the thickness of this partition member 5, it is set so that when the adhesive L flows into the hollow container 4 from the communication hole 22 and is pushed, the partition member 5 does not fall down and its flat plate portion slides while remaining in a posture parallel to the radial cross section of the hollow container 4.

[0053] The lid body 6 is attached in a state of partially protruding from the tip toward the base end side inside the hollow container 4, and is configured such that the protruding amount can be arbitrarily changed. Further, the tip side inside the hollow container 4, that is, the space between the partition member 5 and the lid body 6 inside the hollow container 4 is hermetically sealed by this lid body 6.

[0054] More specifically, as shown in the cross-sectional views of FIGS. 2(b) and 7, the lid body 6 has a double-tube structure including a plug body 61 inserted into the hollow container and an outer cylinder 62 connected to the outer end of the plug body 61 and provided so as to cover the outer peripheral surface of the hollow container.

[0055] The middle plug body 61 is generally hollow cylindrical, and its outer diameter is formed to be approximately the same as or slightly larger than the inner diameter of the hollow container 4. A plurality of ridges 63 protruding radially outward are formed on the outer circumferential surface of the middle plug body 61. For example, the ridges 63 are provided at intervals approximately the same as the distance between the threads of the male thread 71 formed on the hollow container 4. Here, when the male thread 71 of the hollow container 4 is formed by resin molding, shrinkage causes sink marks, and there are portions on the inner circumferential surface of the hollow container that are slightly recessed radially outward at the back side of the male thread 71. Even if there are such recesses, the ridges 63 ensure that the middle plug body 61 abuts against the inner circumferential surface of the hollow container 4, thus maintaining airtightness. Also, although the middle plug body 61 of the first embodiment is generally cylindrical, its inner end is open, and an inner lid 611 is provided at approximately the central portion to partition the inside and outside airtightly.

[0056] The outer cylinder 62 covers the outer circumferential surface of the tip side of the hollow container 4 when the lid body 6 is attached to the hollow container 4, and a female thread 72 is formed on its inner circumferential surface. The outer cylinder 62 has approximately the same axial length as the middle plug body 61 and is arranged coaxially. Also, a plurality of ribs extending in the axial direction are formed at equal intervals on the outer circumferential surface of the outer cylinder 62, forming a gripping portion so that the user can hold it by hand without slipping.

[0057] The screwing structure 7 is composed of a male thread 71 formed on the outer circumferential surface of the hollow container 4 and a female thread 72 formed on the inner circumferential surface of the outer cylinder 62 of the lid body 6, and the width of the thread crest is formed smaller than the width of the thread groove. In other words, in this embodiment, the thread crests of the male thread 71 and the female thread 72 are engaged in a state where only one side surface abuts. Also, since the width of the thread groove is formed large in this way, in order to prevent the lid body 6 from moving easily to the tip side of the hollow container 4 even when the adhesive L flows into the pressure accumulation mechanism TN and the internal air G is pressurized, a ring-shaped anti-rotation member 73 is formed separately from the male thread 71.

[0058] Furthermore, in the first embodiment, when the adhesive L flows into the hollow container 4, the tip side of the lid body 6 is configured to function as a movement restriction structure 8 that limits the range within which the partitioning member 5 can move.

[0059] Specifically, as shown in FIG. 7(a) in the first embodiment, the tip of the inner stopper 61 of the lid body 6 abuts against the outer peripheral portion of the partition member 5, and the partition member 5 is not further moved toward the tip side of the hollow container 4. That is, the position of the tip of the inner stopper 61 in the hollow container 4 becomes a limit position where the movement of the partition member 5 toward the tip side of the hollow container is restricted.

[0060] When the partition member 5 abuts against the tip of the inner stopper 61 and is disposed at the limit position, a pressure space PS having a volume of a predetermined capacity or more is formed between the partition member 5 and the lid body 6, and the gas G in the tip side of the hollow container 4 is pressurized. In the first embodiment, the pressure space PS is formed by the relief recesses 81 formed in both the partition member 5 and the inner stopper 61. The volume of this pressure space PS is set to a predetermined capacity such that the pressure of the gas G becomes 0.4 MPa or less when the partition member 5 reaches the limit position from the base end to the tip side of the hollow container 4. For this reason, even when the gas G is maximally compressed, the pressure on the adhesive L from the partition member 5 becomes 0.4 MPa or less, and injection at a low pressure is realized.

[0061] Next, the effect of the entire injector 100 of the first embodiment will be described.

[0062] The injector 100 of the first embodiment can switch between closing and opening the second flow path L2 leading to the injection port IP side by attaching and detaching the grease gun GG by the flow path switching structure SW. Therefore, while the grease gun GG is attached and the adhesive L is being supplied into the injector 100, the second flow path L2 is closed so that the adhesive L is supplied only into the pressure accumulating mechanism TN via the first flow path L1, and the adhesive L does not directly flow from the grease gun GG into the injection port IP. Also, by simply removing the grease gun GG from the injector 100, the second flow path L2 is opened and the adhesive L can be flowed from the pressure accumulating mechanism TN into the injection port IP and injected into the crack AO. At this time, the adhesive L flows backward through the first flow path L1 from the pressure accumulating mechanism TN, but since the check valve 3 is closed when the grease gun GG is removed, the adhesive L does not leak to the outside from the connection port CP.

[0063] In addition, since all of the adhesive L is injected via the pressure accumulation mechanism TN, the total amount of the adhesive L used in the repair work can be accurately grasped by using the scale or the like of the pressure accumulation mechanism TN. Specifically, since the tips of the outer cylinder 62 and the middle plug body 61 of the lid body 6 are aligned, it can be understood that the movement of the partition member 5 is finally restricted and stopped at the tip position of the outer cylinder 62. Therefore, by aligning with the scale of the hollow container 4 while looking at the tip position of the outer cylinder 62, a desired amount of the adhesive L can be stored in the pressure accumulation mechanism TN. For this reason, it becomes easier to manage the amount of the adhesive L used for repair. Therefore, the amount of the adhesive L injected for each crack AO can be individually managed, and a more reliable repair work can be realized. In addition, language notations such as MAX indicating the maximum capacity position and MIN indicating the minimum capacity position may be provided in addition to the scale of the numerical value indicating the internal capacity on the hollow container 4. Then, the tip position of the outer cylinder 62 may be aligned with the MAX or MIN position so that the maximum capacity or the minimum capacity of the adhesive L flows into the hollow container 4.

[0064] Furthermore, since the partition member 5 cannot move beyond the restricted position inside the hollow container 4 due to the movement restriction structure 8, the adhesive L does not flow into the hollow container 4 in an amount exceeding a predetermined amount. Also, since only a predetermined amount flows into the hollow container 4, the size of the pressurized space PS formed between the partition member 5 and the lid body 6 can always be made constant in a state where the maximum amount of the adhesive L has flowed into the hollow container 4.

[0065] In addition, the volume of the pressurized space PS is configured such that the gas G between the partition member 5 and the lid body 6 becomes a predetermined volume or more in a state where the partition member 5 is disposed at the restricted position by the movement restriction structure 8. Therefore, the gas G in the pressurized space PS can be set to a pressure of, for example, 0.4 MPa or less, and an ideal low-pressure injection state can always be realized.

[0066] Since the lid body 6 is provided so as to be able to advance and retreat in the axial direction of the hollow container 4 by the screwing structure 7, as shown in FIG. 7(b), the injection of the adhesive L has progressed to some extent. Even when the pressure applied by the pressure accumulation mechanism TN has dropped, as shown in FIG. 7(c), the lid body 6 can be moved, and the compressed state of the gas in the hollow container 4 can be appropriately changed to maintain a pressure suitable for injecting the adhesive L into the crack AO, which can be easily done without using tools or the like.

[0067] Also, since there is the screwing structure 7, even if the gas in the hollow container 4 is compressed and the resistance force increases, the user can push the lid body 6 into the hollow container 4 without applying too much force, and the force required by the user for pressurization can be made smaller than before. Note that the check valve 3 of the present embodiment has its slit strongly closed by the pressure of the adhesive L that enters between the tip portion thereof and the inner peripheral surface of the cylindrical body 2. Therefore, even when the adhesive L is pressurized by the lid body 6 and is in a high-pressure state, backflow from the check valve 3 and leakage to the outside can be prevented.

[0068] The lid body 6 has a double-tube structure, and since the axial positions of the outer cylinder 62 and the middle plug body 61 that are gripped by the user can be made substantially the same, the axial length of the pressure accumulation mechanism TN can be made smaller, and the overall outer dimensions can be made smaller. For this reason, even when there are a plurality of cracks in close proximity, it is easy to provide the injector 100 without interference. Also, since there is no need to attach another tool or instrument to the tip side of the pressure accumulation mechanism TN for pressurization or decompression, even when the injector 100 is provided in close proximity, it is easy to perform the pressurization and decompression operations.

[0069] Next, the injector 100 according to the second embodiment of the present invention will be described with reference to FIGS. 8 and 9. Note that the same reference numerals will be given to the members corresponding to the members described in the first embodiment.

[0070] The injector 100 of the second embodiment is such that the lid body 6 is fixed to the hollow container 4, and the structure is simplified compared to the first embodiment. In other words, since the lid body 6 cannot advance and retreat with respect to the hollow container 4, the amount of compression of the gas in the pressure accumulation mechanism TN can always be set to a fixed value.

[0071] Specifically, in the second embodiment, the portion of the lid 6 inserted into the hollow container 4 has a hollow cylindrical shape, and only the outer end face thereof is closed. That is, a relief recess 81 is formed in a portion of the lid 6 other than the outer end face. Further, as shown in FIG. 9(a), in a state where the maximum amount of the adhesive L is supplied into the hollow container 4, the partition member 5 abuts against the inner end face of the lid 6 which is the movement restriction structure 8, and is configured not to be able to move further toward the tip side of the hollow container 4. In this state, the volume of the pressurized space PS formed between the partition member 5 and the lid 6 is set to be a predetermined capacity or more, and low-pressure injection of the adhesive L is realized.

[0072] If it is such a thing, for example, a predetermined amount of the adhesive L can be injected into the repair target at a predetermined pressure, and the manufacturing cost can be reduced as compared with the first embodiment.

[0073] Next, a modified example of the partition member 5 in the injector 100 of the first embodiment or the second embodiment will be described. For example, when small stones or the like are clogged inside the repair target and it is difficult to inject the adhesive L, the operator can move the lid 6 and increase the pressure in the pressurized space PS to blow away small stones or the like with the momentum of the adhesive L to facilitate injection. In such a case, for example, in order to prevent the target low-pressure injection from becoming impossible due to excessive pressurization, as shown in FIG. 10, the partition member 5 may be configured to come off from the hollow container 4 when the pressure in the pressurized space PS becomes a predetermined value or more. Specifically, as shown in FIG. 10, the partition member 5 is compressed and deformed by pressurization, and when pressurized to a pressure of a predetermined value or more, it is configured to fall down with respect to the hollow container 4.

[0074] In such a case, an operator can notice that an unreasonably high pressure is being applied to the extent that low-pressure injection becomes impossible by visually observing that the partition member 5 inside the hollow container 4 has fallen. An operator who notices that the pressure has become too high can immediately interrupt the injection operation and prevent the quality of the repair operation from deteriorating. In order to cause the partition member 5 to fall during such high-pressure application, it can be realized, for example, by adjusting the magnitude of the friction between the partition member 5 and the hollow container 4, the shape and dimensions of the partition member 5, the material of the partition member 5, and the like. For example, by setting the hardness of the raw material of the member forming the partition member 5 to 50 Shore A degrees, the partition member 5 can be made to fall when a high-pressure state is reached where low-pressure injection (0.4 MPa or less) cannot be achieved.

[0075] Next, the injector 100 according to the third embodiment of the present invention will be described with reference to FIGS. 11 and 12. Note that members corresponding to the members described in the first embodiment will be given the same reference numerals.

[0076] In the first embodiment, the flow path switching structure SW was configured by inserting a separate flow path forming body 9 into the cylinder 2 of the injection mechanism IN. However, as shown in FIGS. 11 and 12, in the third embodiment, the flow path switching structure SW is integrally formed by resin molding inside the cylinder 2. Specifically, the middle portion of the cylinder 2 is resin molded to be substantially solid, excluding the first flow path L1 that communicates the check valve 3 side and the injection mechanism TN side of the cylinder 2, and the second flow path L2 that communicates between the check valve 3 side and the injection hole IP side of the cylinder 2. Note that the second flow path L2 may be one axially extending substantially thin-walled semi-cylindrical flow path, or may be formed by dividing it into a plurality of linear flow paths.

[0077] Even in such a case, when the tip of the grease gun GG or the like is inserted into the first flow path L1 in the injection mechanism IN as in the first embodiment, the adhesive L can be prevented from flowing from the grease gun GG into the second flow path L2. Therefore, all of the adhesive L injected from the grease gun GG can be made to flow into the pressure accumulation mechanism TN. Further, when the grease gun GG is removed from the injection mechanism IN and the injection by the pressure accumulation mechanism TN is started, the adhesive L is discharged from the pressure accumulation mechanism TN through the second flow path L2 from the injection port IP. Since all of the adhesive L can be injected into the repair target via the pressure accumulation mechanism TN in this way, the injection amount can be accurately controlled by the scale or the like of the hollow container 4.

[0078] Furthermore, in the third embodiment, since it is not necessary to insert the flow path forming body 9 into the cylinder body 2 when assembling the injector 100, the number of assembly steps can be reduced, and the manufacturability can be improved compared to the injector 100 of the first embodiment.

[0079] Next, the injector 100 according to the fourth embodiment of the present invention will be described with reference to FIGS. 13 and 14. Note that members corresponding to the members described in the first embodiment will be given the same reference numerals.

[0080] In the injector 100 of the fourth embodiment, between the washer 1 and the tip of the cylinder body 2, there are formed a screw structure SC that is screwed together with each other, and a loosening prevention structure LP that restricts the movement of the washer 1 in the direction of separating from the cylinder body 2 in a state where the washer 1 is completely screwed to the cylinder body 2 and prevents loosening of the screw structure SC.

[0081] The anti-loosening structure LP consists of a pair of engaging holes LP1 formed at the tip side of the cylindrical portion 12 of the washer 1 and above the male screw, and a pair of engaging claws LP2 provided so as to protrude outward at the tip of the cylindrical body 2. In this embodiment, the pair of engaging holes LP1 are provided every 180 degrees in the circumferential direction, and the pair of engaging claws LP2 are also provided at the same interval. And in a state where the washer 1 is completely screwed onto the cylindrical body 2, the pair of engaging claws LP2 are configured to fit into the pair of engaging holes LP1 facing each other. In addition, four holes for punching are formed side by side in the circumferential direction in the cylindrical portion 2, which are substantially the same shape as the pair of engaging holes LP1 and are formed separately from the pair of engaging holes LP1.

[0082] As shown in FIG. 14, the tip of the engaging claw LP2 has a substantially L-shaped longitudinal cross-sectional shape and corresponds to the corner of the upper edge of the engaging hole LP1. In a state where the engaging claw LP2 is fitted in the engaging hole LP1, even if the washer 1 rotates with respect to the cylindrical body 2, the tip of the engaging claw LP2 abuts against the corner of the upper edge of the engaging hole LP1, preventing the washer 1 from moving toward the tip side of the cylindrical body 2. More specifically, when the L-shaped portion of the engaging claw LP2 is pushed toward the tip side of the cylindrical body 2 by the upper edge of the engaging hole LP1, the engaging claw LP2 will tilt slightly in the direction of opening outward. Then, the portion that forms the standing wall in the L-shaped portion of the engaging claw LP2 will come into contact with the upper edge of the engaging hole LP1. As a result, it is locked so that the engaging claw LP2 does not tilt further toward the tip side, and the washer 1 cannot move in the direction of coming off the cylindrical body 2.

[0083] Furthermore, in this embodiment, since the circumferential width dimension of the engaging claw LP2 and the circumferential width dimension of the engaging hole LP1 are set to be substantially the same, in a state where the engaging claw LP2 is inserted into the engaging hole LP1, the side surface of the engaging claw LP2 will abut against the circumferential edge of the engaging hole LP1. For this reason, even if an attempt is made to rotate the washer 1 with respect to the cylindrical body 2, the engaging claw LP2 will prevent its movement, so rotation that loosens the screw structure SC is unlikely to occur in the first place.

[0084] Therefore, once the washer 1 is attached to the cylinder 2, the anti-loosening structure LP can prevent the screwed state of the screw structure SC from loosening.

[0085] Thus, in the case of the injector 100 of the fourth embodiment, even if the washer 1 is screwed onto the cylinder 2 in advance and shipped, during transportation or the like, the washer 1 rotates by contacting other members, etc., and it is possible to prevent the screwed state of the washer 1 with respect to the cylinder 2 from loosening. As a result, even if the washer 1 is attached to the cylinder 2 in advance to reduce the on-site assembly man-hours, the initial state can be maintained continuously. Therefore, it is possible to prevent the washer 1 from coming off the cylinder 2 when pressure is applied during the injection of the adhesive L, and to prevent the occurrence of a repair work failure such as the adhesive L leaking out without screwing the washer 1 onto the cylinder 2 at the site.

[0086] In addition, since it can be shipped even with the washer 1 and the cylinder 2 removed, the state of the injector 100 can also be adjusted according to the on-site situation and the progress of the work.

[0087] Note that the anti-loosening structure LP is not limited to the mode described in the fourth embodiment. For example, an engaging hole LP1 may be formed in the cylinder 2, and an engaging claw LP2 may be provided on the washer 1. Also, the number of the engaging claws LP2 is not limited to a pair, and a larger number of engaging claws LP2 may be provided. For example, the engaging claws LP2 may be further increased so that the hole for punching provided other than the engaging hole LP1 can be used as the engaging hole LP1.

[0088] Other embodiments of the present invention will be described.

[0089] The flow path switching structure SW is not limited to being formed by inserting the flow path forming body 9 into the cylinder body 2 of the injection mechanism IN. For example, the flow path may be switched according to whether or not the grease gun GG, which is an injector, is attached in the structure of the cylinder body 2 itself. In other words, instead of configuring the cylinder body 2 and the flow path forming body 9 as separate members, they may be configured as one member by integral molding. Alternatively, the cylinder body 2 having the flow path switching structure SW may be formed by dividing it into a plurality of parts and then joined later so that the same functions as those of the above-described embodiment are realized.

[0090] The engaging portion LK is not limited to positioning the axial position of the flow path forming body 9 in the cylinder body 2 by matching each plane. For example, the cylinder body 2 may be tapered as it advances toward the injection port IP side, and the flow path forming body 9 may be configured so that it cannot advance toward the injection port IP side beyond a predetermined position. Further, the flow path forming body 9 may be configured to be positioned at a predetermined position within the cylinder body 2 so that the shape of the outer surface of the flow path forming body 9 and the shape of the inner peripheral surface of the cylinder body 2 match.

[0091] The movement restricting structure 8 is not limited to that described in each embodiment. For example, after inserting the partition member 5 into the hollow container 4, a separate ring-shaped fastener may be inserted and fixed to the inner peripheral surface of the hollow container by an adhesive or welding or the like so that the partition member cannot move to the tip side of the fastener. Alternatively, a stay rod protruding from the lid body 6 toward the partition member 5 side may be provided as the movement restricting structure 8.

[0092] It is sufficient that the pressure in the pressurized space PS is equal to or less than a predetermined value when the partition member 5 reaches the restricted position defined by the movement restricting structure 8. If the pressurized space PS has a sufficient volume, it is not necessary to provide the relief recess 81 in either the partition member 5 or the lid body 6. Alternatively, the relief recess 81 may be provided in only one of the partition member 5 or the lid body 6.

[0093] Regarding the screwing structure 7, it suffices to be provided between the hollow container 4 and the lid body 6. Female threads 72 may be formed on the inner circumferential surface of the hollow container 4, and male threads 71 may be formed on the outer circumferential surface of the middle plug body 61 of the lid body 6. Further, in order to further improve the airtightness by the middle plug body 61, a packing may be provided at the tip of the middle plug body 61.

[0094] Regarding the lid body 6, it does not necessarily have to have a double-tube structure. For example, a gripping portion may be formed so as to be gripped by the user to rotate the lid body 6 so as to protrude further outward from the outer end of the middle plug body.

[0095] The pressure accumulation mechanism TN does not have to be provided orthogonally to the injection mechanism IN, and may be attached obliquely. In short, it suffices that the pressure accumulation mechanism TN is provided branching from the injection mechanism IN. Further, the shape of the hollow container 4 constituting the pressure accumulation mechanism TN is not limited to a cylindrical tube shape. For example, the hollow container 4 may be formed in a two-stage cylindrical shape in which the base end side is thinner than the tip end side. If it is such a shape, the length dimension by which the hollow container 4 protrudes with respect to the injection mechanism IN can be shortened, and the injector 100 itself can be configured compactly. Moreover, since the volume of the gas pushed into the hollow container 4 when the lid body 6 is attached can also be increased, the gas in the hollow container 4 can be pre-pressurized to be equal to or more than that in the embodiment.

[0096] In the embodiment, the repair target was the crack AO, but the present invention may be used for other repair targets. Further, although the adhesive L was cited as an example of the fluidity repair material, for example, the fluidity repair material injector of the present invention can also be used for other materials such as caulking materials. Further, the supply source of the fluidity repair material is not limited to a grease gun, and the fluidity repair material may be manually injected into the repair target by a caulking gun or, for example, a syringe.

[0097] In addition, various modifications and combinations of embodiments may be made as long as they do not contravene the gist of the present invention.

Explanation of reference numerals

[0098] 100 ··· Injector (Flowability Repair Material Injector) IN ··· Injection Mechanism TN ··· Pressure Accumulation Mechanism 1 ··· Washer 11 ··· Thin Disk Portion 12 ··· Cylindrical Portion 2 ··· Cylinder 21 ··· Male Screw 22 ··· Communication Hole 23 ··· Base Portion 24 ··· Corner Portion 3 ··· Check Valve CV ··· Cover 4 ··· Hollow Container 5 ··· Partition Member 6 ··· Cover Body 61 ··· Inner Plug Body 611 ··· Inner Cover 62 ··· Outer Cylinder 63 ··· Rib 7 ··· Screwing Structure 71 ··· Male Thread 72 ··· Female Thread 8 ··· Movement Restriction Structure 81 ··· Relief Recess 9 ··· Flow Path Forming Body 91 ··· Internal Cavity 92 ··· Connection Hole 93 ··· Side Opening 94 ··· Slot 95 ··· Recess SW ··· Flow Path Switching Structure LK ··· Engaging Portion

Claims

1. An injection mechanism comprising a connection port to which a fluidity repair material supply device is connected, and an injection port that is attached to face the repair target and injects the fluidity repair material into the repair target; The injection mechanism further includes a pressure accumulation mechanism that branches between the connection port and the injection port, into which the fluidity repair material supplied through the connection port flows and the internal gas is compressed; The pressure accumulation mechanism is: A hollow container having a base end provided in the injection mechanism and an open tip; A partition member slidably provided between the base end and the tip in the hollow container; A lid that airtightly seals the tip of the hollow container; The injection device configured such that when the pressure accumulation mechanism is in a state where the fluidity repair material is flowing into it, and the pressure in the pressurized space formed between the lid and the partition member increases continuously due to pressurization, the partition member is compressed and deformed by the pressurization and tilts with respect to the hollow container.

2. The injection device according to claim 1, wherein a relief recess is formed on the surface of the partition member facing the lid, recessed axially along the central axis of the hollow container toward the base end side, and a part of the pressurized space is formed by the relief recess.

3. The injection device according to claim 2, wherein the relief recess has a tapered shape that tapers toward the base end side.

4. A screwing structure is formed between the hollow container and the lid; The injection device according to any one of claims 1 to 3, wherein the lid is attached to be axially movable forward and backward with respect to the hollow container.

5. The pressure accumulation mechanism further includes a movement restriction structure that restricts the movement of the partition member from the restriction position to the tip side in the hollow container; The injection device according to any one of claims 1 to 4, configured such that the fluidity repair material is allowed to flow into the hollow container, and when the partition member reaches the restriction position, the pressure in the pressurized space becomes equal to or less than a predetermined value.

6. The injection device according to any one of claims 1 to 5, wherein the hollow container is configured such that its interior can be seen through.

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