Multi-liquid mixture discharge tool and head of multi-liquid mixture discharge tool

Abstract

The present invention suppresses damage to a tool body caused by liquid backflow to the upstream side of a housing and solidification. A tool for mixing and discharging multiple liquids according to a first embodiment is provided with: a gripping part which is gripped by an operator; a pressure feeding part provided on the grip part and independently and alternately pressure-feeding a first liquid and a second liquid by driving; the frame body is detachably installed on the outlet of the pressure feeding part and is provided with a first flow path for pressure feeding of the first liquid from the first outlet of the pressure feeding part and a second flow path for pressure feeding of the second liquid from the second outlet of the pressure feeding part. A second flow path for pressure-feeding the second liquid from a second outlet of the pressure-feeding unit; and a check valve provided in at least one of the first flow path and the second flow path. And a nozzle that mixes and discharges the first liquid and the second liquid, which have flowed in from the housing.

Description

Technical Field

[0001] The present disclosure relates to a tool for mixing and ejecting multiple liquids and a head of the tool for mixing and ejecting multiple liquids. Background Art

[0002] The multi-liquid mixing and ejecting device described in Japanese Patent Gazette No. 2021-194613 is a device that mixes and ejects at least a first fluid and a second fluid having a density smaller than that of the first fluid, and comprises: a first flow path for conveying the first fluid, a second flow path for conveying the second fluid, a confluence portion for mixing the first fluid conveyed by the first flow path and the second fluid conveyed by the second flow path, and an intrusion suppression portion for suppressing at least any one of intrusion of the second fluid into the first flow path and intrusion of the first fluid into the second flow path.

[0003] When cracks appear in a structure such as a concrete wall, a mixed liquid that solidifies after mixing may be injected to repair it. The mixed liquid is difficult to inject into the cracks of the structure and needs to be pressed in. However, since the two liquids before mixing are alternately pressed inside the tool, when the mixed liquid is pressed into the crack, one liquid flows back to the other liquid on the upstream side of the frame that is a part of the tool, and a mixed liquid is generated on the upstream side of the frame. The mixed liquid solidifies, which may cause damage to the tool body. Summary of the invention

[0004] An object of the present disclosure is to suppress damage to a tool body caused by liquid flowing back to the upstream side of a frame and solidifying.

[0005] The multi-liquid mixing and ejecting tool involved in the first embodiment comprises: a holding portion, which is held by an operator; a pressure-feeding portion, which is arranged on the holding portion and is driven to independently and alternately pressurize a first liquid and a second liquid; a frame, which can be detachably mounted on the outlet of the pressure-feeding portion, and comprises: a first flow path for pressurizing the first liquid from the first outlet of the pressure-feeding portion, a second flow path for pressurizing the second liquid from the second outlet of the pressure-feeding portion, and a check valve arranged in at least one of the first flow path and the second flow path; and a nozzle, which mixes the first liquid and the second liquid flowing in from the frame and ejects them.

[0006] According to the above configuration, it is possible to suppress damage to the tool body caused by one liquid flowing back to the other liquid on the upstream side of the frame and solidifying.

[0007] The multi-liquid mixing and ejecting tool according to a second aspect is the multi-liquid mixing and ejecting tool according to the first aspect, wherein the check valves are provided in each of the first flow path and the second flow path.

[0008] According to the above configuration, it is possible to suppress damage to the tool body caused by the mixed liquid of the first liquid and the second liquid flowing back to the flow path where the check valve is not provided and the entire frame solidifying.

[0009] The multi-liquid mixing and ejecting tool according to a third aspect is the multi-liquid mixing and ejecting tool according to any one of the first aspect and the second aspect, wherein the frame has a wall portion formed in a region where the check valve is provided and separating the first flow path from the second flow path.

[0010] According to the above configuration, since the liquids are present in an unmixed state in the region where the check valve is provided, it is possible to suppress the solidification of the mixed liquid inside the housing.

[0011] The multi-liquid mixed ejection tool involved in the fourth embodiment is the multi-liquid mixed ejection tool described in any one of the first to third embodiments, and the frame has a plate shape and supports the check valve with one part and allows the first liquid and the second liquid to flow to the nozzle with another part.

[0012] According to the above configuration, the number of components can be reduced compared to a configuration in which a component responsible for supporting the check valve and a component responsible for supplying each liquid to the nozzle are separate.

[0013] A multi-liquid mixing and ejecting jig according to a fifth aspect is the multi-liquid mixing and ejecting jig according to any one of the first to fourth aspects, wherein the nozzle is detachably mounted to the frame.

[0014] According to the above configuration, when solidification occurs only inside the nozzle, the nozzle can be removed from the housing and only the nozzle can be replaced.

[0015] A multi-liquid mixing and ejecting jig according to a sixth aspect is the multi-liquid mixing and ejecting jig according to any one of the first to fifth aspects, and includes an elastic body attached to the outer periphery of the nozzle tip.

[0016] According to the above structure, when the nozzle is inserted into the ejected portion, the elastic body bites into the ejected portion, so even if it is ejected at a high pressure, the mixed liquid can be stably ejected to the ejected portion compared to a structure in which the elastic body is not installed on the outer periphery of the nozzle front end.

[0017] The head of the multi-liquid mixing and ejecting tool involved in the seventh embodiment can be installed at the outlet of the pressure-feeding part, and comprises: a frame having a first flow path for pressurizing a first liquid from the first outlet of the pressure-feeding part, a second flow path for pressurizing a second liquid solidified by mixing with the first liquid from the second outlet of the pressure-feeding part, a check valve arranged in at least one of the first flow path and the second flow path, and a wall portion formed in the setting area of ​​the check valve and separating the first flow path from the second flow path; and a nozzle for mixing and ejecting the first liquid and the second liquid flowing in from the frame.

[0018] According to the above configuration, when a plurality of liquids that solidify by mixing are pressure-fed, the cleaning range of the pressure-fed portion can be limited compared to a configuration in which the entire pressure-fed portion is cleaned.

[0019] Effects of the Invention

[0020] According to the present disclosure, it is possible to suppress damage to the tool body caused by the liquid flowing back to the upstream side of the frame and solidifying. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view schematically showing a spray gun according to an embodiment of the present disclosure;

[0022] Figure 2A It is a front view of the spray gun according to the embodiment of the present disclosure, in the vicinity of the equipment-side discharge portion to which a seal is assembled;

[0023] Figure 2B yes Figure 2A S2-S2 cross-sectional view;

[0024] Figure 3A is a front view of a socket base of a spray gun according to an embodiment of the present disclosure;

[0025] Figure 3B yes Figure 3A S3-S3 cross-sectional view;

[0026] Figure 4 is a cross-sectional view of a head according to an embodiment of the present disclosure;

[0027] Figure 5 is a cross-sectional view of a nozzle constituting a head according to an embodiment of the present disclosure;

[0028] Fig. 6A is a front view of a valve plug constituting a head according to an embodiment of the present disclosure;

[0029] Figure 6B yes Fig. 6A S6-S6 cross-sectional view;

[0030] Fig. 7A is a front view of a spring pressing member of a head according to an embodiment of the present disclosure;

[0031] Figure 7B It is a right side view of the spring pressing part of the head;

[0032] Fig. 8A is a cross-sectional view of a state in which a valve plug constituting a head according to an embodiment of the present disclosure is installed in a valve;

[0033] Figure 8B The valve is in a state where the first liquid acts on it. Fig. 8A S8-S8 cross-sectional view;

[0034] Fig. 9A is a top cross-sectional view of a state where the valve blocks the first flow path and the second flow path respectively;

[0035] Fig. 9B This is a top cross-sectional view of a state in which the valve of the first flow path is opened by the first liquid and the valve of the second flow path is closed. DETAILED DESCRIPTION

[0036] (Structure of the first embodiment)

[0037] use Figure 1 FIG9 to FIG9 illustrate an example of a spray gun 10 as an example of a multi-liquid mixed jetting tool according to an embodiment of the present disclosure and an example of a head 60 constituting the multi-liquid mixed jetting tool. In addition, for the sake of convenience of explanation, the arrow H shown in the figure indicates the tool up and down direction (e.g., vertical direction), the arrow W indicates the tool width direction (e.g., horizontal direction), and the arrow D indicates the tool depth direction (e.g., horizontal direction), but the actual use of the spray gun 10 is not limited to this.

[0038] Figure 1 1 is a front view schematically showing a spray gun 10 according to an embodiment of the present disclosure. The spray gun 10 includes a grip 20, a pump 30 as an example of a pressure-feeding unit, a container 40, a support 50, and a head 60. When an operator grips the grip 20 and presses a switch 22 described later while inserting the front end of the head 60 into a crack of a sprayed portion (not shown), a mixed liquid described later is sprayed from the head 60. The head 60 of the spray gun 10 is detachable from the support 50.

[0039] The spray gun 10 of this embodiment is an electric type as an example. The grip 20 has a main body 21, a switch 22 and a battery 24. The main body 21 is L-shaped, and the battery 24 is provided below the portion extending in the vertical direction, and the switch 22 is provided at a position where the portion extending in the vertical direction and the portion extending in the width direction intersect. The switch 22 is provided protrudingly relative to the main body 21. The switch 22 has a movable area in the width direction, and as the switch 22 is operated, it can switch between an on position in which power is supplied by the battery 24 and an off position in which power is not supplied by the battery 24.

[0040] The pump 30 is connected to a portion of the grip 20 extending in the width direction. The pump 30 is, for example, a plunger type. When the switch 22 is in the on position, the pump 30 independently and alternately presses the first liquid and the second liquid to the head 60 via the support portion 50 described later. In addition, when the switch 22 is in the off position, the pump 30 does not press the first liquid and the second liquid to the head 60. The discharge pressure of the pump 30 is 4.9 MPa (i.e., 50 kgf / cm 2 ) is about work pressure.

[0041] The container 40 is a bottomed cylindrical shape extending in the vertical direction, and is disposed between the pump 30 and the support portion 50 described later. The container 40 is flexible. A plurality of containers 40 are provided, each containing a first liquid and a second liquid. The spray gun 10 of this embodiment sprays the mixed liquid by mixing the first liquid and the second liquid, so that before mixing, the first liquid and the second liquid are stored in different containers 40. For example, the first liquid is a main agent of epoxy, and the second liquid is a curing agent thereof. By mixing the first liquid and the second liquid, a mixed liquid of epoxy resin in a grease-like (i.e., gel-like) state is generated in the cylindrical portion 72 of the nozzle 70 described later.

[0042] The support portion 50 is supported by the grip portion 20 via the pump 30 , and supports the container 40 replaceably connected to the lower portion in the up-down direction and the head portion 60 replaceably connected to the other end in the width direction.

[0043] The support portion 50 includes a device-side spout portion 52 , a seal 54 , a socket base portion 56 , and a nut portion 58 on the head portion 60 side (ie, the other end side in the width direction). Figure 2A 1 is a front view of the spray gun 10 according to the embodiment of the present disclosure, and is near the equipment-side discharge portion 52 to which the seal 54 is assembled. Figure 2B yes Figure 2A S2-S2 cross-sectional view.

[0044] The device-side ejection portion 52 is a cylindrical shape having a through hole inside, and is disposed at the other end side in the width direction of the support portion 50. Its material is, for example, SUS (ie, stainless steel). Figure 2BAs shown, a first device side flow path 521 extending in the width direction and capable of flowing the first liquid is provided inside the device side ejection portion 52, and a first device side flow path 521 is provided as shown in FIG. Figure 2A As shown in the figure, the second device side flow path 522 is provided in parallel with the first device side flow path 521 and is capable of flowing the second liquid. The downstream end of the first device side flow path 521 is an example of a first outlet, and the downstream end of the second device side flow path 522 is an example of a second outlet. In addition, a pair of threaded holes 523 are provided inside the device side ejection part 52. The pair of threaded holes 523 are as shown in the figure. Figure 2B As shown, it extends along the width direction (ie, W direction), as Figure 2A As shown in the figure, the first equipment side flow path 521 and the second equipment side flow path 522 are separated in the up-down direction (i.e., the H direction). Figure 2B As shown, an external thread portion 524 is provided on the outer surface of the equipment-side ejection portion 52 so as to extend in the width direction (ie, the W direction). The equipment-side ejection portion 52 allows the first liquid and the second liquid to flow toward the head 60 side.

[0045] The seal 54 is a disc-shaped rubber sheet with a plurality of holes, and its material is, for example, chloroprene rubber. The seal 54 is provided to contact the device-side ejection portion 52 from the other end side in the width direction of the device-side ejection portion 52, and to suppress liquid leakage between the device-side ejection portion 52 and the socket base 56 described later. The seal 54 is provided at a position that does not cover the first device-side flow path 521, the second device-side flow path 522, and the threaded hole 523.

[0046] Figure 3A is a front view of the socket base 56 of the spray gun 10 involved in the embodiment of the present disclosure, Figure 3B yes Figure 3A S3-S3 cross-sectional view of Figure 3B As shown, the socket base 56 is a disc-shaped body with a plurality of holes, and is inserted into the equipment side ejection part 52 from the other end side of the equipment side ejection part 52, and one surface contacts the seal 54. The socket base 56 contacts the head 60 described later with the other surface on the opposite side of the one surface contacting the seal 54. The material of the socket base 56 is, for example, PC (i.e., polycarbonate) resin or the like.

[0047] The socket base 56 is provided with a sealing member 561, a protrusion 562, a hole 563, a screw hole 564 and an alignment portion 565 on a disc-shaped base material. The sealing member 561 is an annular elastic body, such as an O-ring. Figure 3B As shown, the sealing member 561 is provided to be replaceable relative to the socket base 56 to suppress the leakage of liquid from the hole 563 described later. The protrusion 562 is provided at the center of the socket base 56 and is a plate-like body rising from the other surface of the socket base 56 to position the valve plug 80 on the head 60. Figure 3AAs shown, the holes 563 are arranged in pairs in a stepped shape separated by the protrusions 562 in the depth direction, including a hole 563 arranged on one side (i.e. Figure 3B The hole 563 is provided at a position corresponding to the first device side flow path 521 and the second device side flow path 522 of the device side ejection part 52, and the first liquid and the second liquid can flow through the hole 563. A sealing member 561 is provided between the small diameter portion and the large diameter portion of the hole 563.

[0048] like Figure 3A As shown, the screw hole 564 is arranged in the width direction (i.e., Figure 3A The through holes 564 are arranged in pairs in a spaced relationship in the vertical direction (from top to bottom), and the inner surface is not threaded. The screw holes 564 are arranged at positions corresponding to the threaded holes 523 of the device-side ejection portion 52, and the screws (not shown) can be inserted in the width direction (i.e., from top to bottom). Figure 3A By fastening a screw (not shown) to the threaded hole 523 of the device-side ejection portion 52 through the screw hole 564, the device-side ejection portion 52, the seal 54 and the socket base 56 become one. It is worth noting that the distance separating a pair of screw holes 564 is longer than the distance separating a pair of holes 563.

[0049] In addition, the alignment portion 565 is provided on the outer periphery of the base material and is a cutout provided from the other surface to the one side. The alignment portion 565 can easily align the head 60 with the support portion 50 by engaging with the protrusion 87 in the valve plug 80 described later, and can suppress the generation of mixed liquid inside the support portion 50 due to assembly errors.

[0050] The nut portion 58 (see, for example, Fig. 9A ) is a cylindrical shape having a hole on the bottom surface. When the head 60 described later is inserted into the hole on the bottom surface, the head 60 and the support part 50 are integrated by fastening the external thread portion 524 of the device-side ejection part 52 to the internal thread (not shown) provided on the inner circumferential surface of the nut part 58. That is, the nut part 58 enables the head 60 to be removed from the support part 50 and replaced.

[0051] Figure 4 1 is a cross-sectional view of a head 60 according to an embodiment of the present disclosure. The head 60 includes a nozzle 70, a valve plug 80 as an example of a frame, and a valve 90 as an example of a check valve. The head 60 mixes a first liquid and a second liquid pumped from a grip 20 side of the spray gun 10 by a pump 30, and sprays the mixed liquid from the front end.

[0052] (Nozzle 70)

[0053] Figure 52 is a cross-sectional view of a nozzle 70 constituting a head 60 according to an embodiment of the present disclosure. The nozzle 70 is cylindrical and has a function of mixing a first liquid and a second liquid therein. The nozzle 70 includes a cylindrical portion 72, a storage portion 74, a front end portion 76, and a Figure 4 A cover portion 78 is shown as an example of an elastic body.

[0054] The cylindrical portion 72 has a twisting portion 721 and a recessed portion 722, and is cylindrical and extends in the width direction of the spray gun 10. The cylindrical portion 72 mixes the first liquid and the second liquid. The material of the cylindrical portion 72 is, for example, PC (i.e., polycarbonate) resin or PET (i.e., polyethylene terephthalate) resin. A twisting portion 721 is provided in a section inside the cylindrical portion 72. The twisting portion 721 can be formed by any known method. For example, the twisting portion 721 is a shape twisted at a predetermined angle and direction for each predetermined distance. The twisting portion 721 is inserted into the cylindrical portion 72 from one side of the storage portion 74. The recessed portion 722 is formed at the end of the cylindrical portion 72, and is a groove opened on the side of the front end portion 76 described later, and has a positioning function of the cover portion 78.

[0055] The storage part 74 is a bottomed cylindrical base having a hole on the bottom surface, and is formed continuously with the cylindrical part 72. The storage part 74 is provided with a sealing member 741, a seat 742 and a groove 743 on the base. The sealing member 741 is an elastic body formed in a ring shape, and is provided to be replaceable relative to the base 740, and suppresses the leakage of liquid from the inside of the base to the outside in the state of the nozzle 70 described later. For example, the sealing member 741 is an O-ring. The seat 742 is provided on the outer peripheral side of the cylindrical part 72, and functions as a seat surface of the sealing member 741. The groove 743 is a pair of opposing grooves provided on the inner peripheral surface of the base, and is formed in a direction away from the cylindrical part 72 in the width direction compared to the end of the cylindrical part 72. The groove 743 is engaged with the valve plug 80 described later, and the nozzle 70 and the valve plug 80 become one. That is, the nozzle 70 is detachably mounted on the valve plug 80.

[0056] The front end portion 76 is a cone having a through hole 761 in the center and a depression on the outer peripheral surface, which is connected to the cylindrical portion 72 inside and is formed on the opposite side of the storage portion 74 across the cylindrical portion 72. The front end portion 76 is inserted into the ejected portion (not shown) in order to eject the mixed liquid. The through hole 761 is a hole that passes from the end of one side of the cylindrical portion 72 to the front end, and the mixed liquid mixed with the first liquid and the second liquid is pressure-fed inside the through hole 761. The depression on the outer peripheral surface of the front end portion 76 is all over the outer peripheral surface. In addition, regarding the inner diameter of the front end portion 76, the inner diameter of the end of one side of the cylindrical portion 72 is formed to be the same as the inner diameter of the end of the cylindrical portion 72 or thinner than the inner diameter of the end of the cylindrical portion 72, and the inner diameter gradually decreases from the end of one side of the cylindrical portion 72 toward the front end.

[0057] like Figure 4As shown, the cover 78 is a cylindrical body, which is an elastic body installed on the outer periphery of the front end 76. For example, the material of the cover 78 is a thermoplastic elastomer. The length of the cover 78 from one end to the other end (i.e. Figure 4 The length in the width direction of the cover 78 is shorter than the length in the width direction of the front end portion 76. That is, in a state where one end of the cover 78 is inserted into the recessed portion 722 of the cylindrical portion 72, the front end of the front end portion 76 protrudes from the other end of the cover 78. When the spray gun 10 with the cover 78 mounted on the outer periphery of the front end portion 76 is inserted into the sprayed portion, the recessed portion 722 restricts the movement of the cover 78 in the width direction, and the cover 78 itself is elastically deformed in the width direction, and the cover 78 bites into the sprayed portion.

[0058] (Valve plug 80)

[0059] Fig. 6A 2 is a front view of a valve plug 80 constituting a head portion 60 according to an embodiment of the present disclosure. Figure 6B yes Fig. 6A S6-S6 cross-sectional view. Figure 6B As shown, the valve plug 80 is a cylindrical body extending in the width direction, and its interior is partitioned to suppress mixing of the first liquid and the second liquid. The valve plug 80 connects the socket base 56 of the support part 50 and the nozzle 70. The valve plug 80 is configured to include a first flow path 81, a second flow path 82, a wall 83 as an example of a wall part, an inner claw part 84, an outer claw part 85, a groove 86, a protrusion 87, and a spring pressing member 88 as an example of a plate in the cylindrical body. The material of the valve plug 80 is, for example, PP (i.e., polypropylene) resin.

[0060] The first flow path 81 is a flow path for the first liquid provided inside a bottomed cylindrical body with the upstream side as the bottom, and guides the first liquid pressure-fed from the first equipment side flow path 521 on the upstream (pump 30) side to the downstream (i.e., the nozzle 70). The second flow path 82 is a flow path for the second liquid provided inside the cylindrical body, and guides the second liquid pressure-fed from the second equipment side flow path 522 on the upstream (i.e., the pump 30) side to the downstream (i.e., the nozzle 70).

[0061] The first flow path 81 and the second flow path 82 are composed of separate independent pipes protruding from the bottom of the cylinder toward the upstream side, and these pipes are arranged at positions corresponding to the pair of holes 563 of the socket base 56. Fig. 6A and Figure 6BAs shown, the first flow path 81 and the second flow path 82 are independent flow paths formed into a semi-cylindrical shape by sharing a wall 83 inside the cylindrical body, and the cylindrical body can also be said to separate the first flow path 81 and the second flow path 82 by the wall 83. In other words, the first flow path 81 and the second flow path 82 are both in the shape of a connecting pipe and a semi-cylindrical body, and the downstream portion of the first flow path 81 and the second flow path 82 forms a setting area of ​​the valve 90 described later inside the cylindrical body. The wall 83 is formed inside the cylindrical body, and is a plate-like body extending from the end on the opposite side of the end on one side of the nozzle 70 toward the end on one side of the nozzle 70, and separating the first flow path 81 and the second flow path 82 in the depth direction. The wall 83 is formed on the end side of the cylindrical body that is closer to the socket base 56 side than the end on the nozzle 70 side, and a surface 831 is formed at the end on the nozzle 70 side.

[0062] The first flow path 81 and the second flow path 82 have tapered portions 811 and 821, respectively, upstream of the wall 83. The flow path diameters of the first flow path 81 and the second flow path are formed so that the downstream sides of the tapered portions 811 and 821 are larger than the upstream sides.

[0063] The inner claw portion 84 is formed in a claw shape extending over the inner peripheral surface of the cylindrical body toward the center C of the cylindrical body. The inner claw portion 84 has a surface portion 841 facing the surface 831 of the wall 83 , and supports a spring pusher 88 described later.

[0064] The outer claw 85 is formed in a claw shape that stands up in the depth direction on the outer circumference of the cylindrical body. The height of the outer claw 85 decreases as it moves from the upstream of the first flow path 81 and the second flow path 82 toward the downstream. The outer claw 85 can be engaged with the groove 743 of the storage portion 74 of the nozzle 70.

[0065] The groove 86 is formed on the outer surface of the cylindrical body and is open in a direction opposite to the direction (e.g., width direction) in which the wall 83 extends between the first flow path 81 and the second flow path 82. The groove 86 can receive the protrusion 562 of the socket base 56 in the support portion 50, and the valve plug 80 and the support portion 50 are positioned by receiving the protrusion 562 in the groove 86.

[0066] like Fig. 6A and Figure 8B As shown, the protrusion 87 stands on the outer surface of the cylindrical body in the direction opposite to the direction in which the wall 83 extends (for example, the width direction). The protrusion 87 is engaged with the alignment portion 565 of the socket base 56 in the support portion 50, and the valve plug 80 and the support portion 50 are positioned. Compared with the groove 86, which positions the valve plug 80 and the support portion 50 even in a state of 180° phase reversal, the protrusion 87 uniquely positions the valve plug 80 and the support portion 50.

[0067] Fig. 7Ais a front view of the spring pressing member 88 of the head 60 according to the embodiment of the present disclosure, Figure 7B is the right view. Fig. 7A As shown, the spring pressing member 88 is a cross-shaped plate, and the spring pressing member 88 is provided with a protrusion 881, a cutout 882 and a central portion 883 on the cross-shaped plate, and is detachably assembled relative to the inside of the valve plug 80. Figure 7B As shown, one surface of the cross-shaped body (i.e., the surface on the right side in the width direction) is flat and abuts against the surface 841 of the inner claw portion 84. Thus, the spring pressing member 88 supports the valve 90 described later. That is, the spring pressing member 88 supports the valve 90 through a part thereof (i.e., the convex portion 881 described later).

[0068] The convex part 881 is a disc-shaped protrusion, and two convex parts 881 are formed to be separated from each other in the depth direction of the cross-shaped body. The convex part 881 is formed at a position facing the first flow path 81 and the second flow path 82.

[0069] like Fig. 7A As shown, the cutouts 882 are four areas separated from each other on the outer circumference of the cross-shaped body. The cutouts 882 form a space between the inner circumference of the valve plug 80 and the outer circumference of the spring pressing member 88 when assembled to the valve plug 80. The space constitutes a part of the first flow path 81 and the second flow path 82.

[0070] like Figure 7B As shown, the central portion 883 is a flat portion formed on the other surface (i.e., the surface on the left side in the width direction), and is located between the two convex portions 881. The central portion 883 abuts against the surface 831 of the wall 83. By the abutment of the central portion 883 against the surface 831, the first flow path 81 and the second flow path 82 are separated from the other surface of the central portion 883 to one surface as independent flow paths. That is, since the spring pressing member 88 separates the first flow path 81 and the second flow path 82 in the same manner as the wall 83, the first liquid flowing through the first flow path 81 and the second liquid flowing through the second flow path 82 are respectively circulated to the nozzle 70 at the other part of the spring pressing member 88.

[0071] (Valve 90)

[0072] The valve 90 will be described. The valve 90 suppresses the backflow of the first liquid and the second liquid flowing through the first flow path 81 and the second flow path 82, respectively. Fig. 8A 2 is a cross-sectional view of a state where a valve 90 is installed in a valve plug 80 constituting a head according to an embodiment of the present disclosure. Figure 8B The valve 90 is in a state where the first liquid is applied force. Fig. 8A S8-S8 cross-sectional view.

[0073] like Fig. 8AAs shown in FIG. 1 , the valve 90 includes a valve body 92 and a spring 94. A portion of the upstream side of the valve body 92 is formed into a conical shape, and the maximum outer diameter of the valve body 92 is formed to be larger than the diameter of the pipe portion of the first flow path 81 and the second flow path 82, and the valve body 92 is formed to be smaller than the space of the semicircular portion of the first flow path 81 and the second flow path 82. One end of the valve body 92 abuts against the tapered portion 811 of the first flow path 81 as a valve seat and the tapered portion 821 of the second flow path 82 as a valve seat, thereby closing the first flow path 81 and the second flow path 82. The other end of the valve body 92 is supported by the spring 94.

[0074] The spring 94 is a compression coil spring, one end of which supports the valve body 92, and the other end of which is supported by the spring pressing piece 88 of the valve plug 80. The spring 94 is stored in the valve plug 80 in a state compressed compared to its natural length. That is, when the first liquid and the second liquid are not pressure-fed from the first flow path 81 and the second flow path 82, the spring 94 makes the valve body 92 abut against the tapered portion 811 and the tapered portion 821. When the first liquid and the second liquid are pressure-fed, the spring 94 is further compressed together with the valve body 92 by the hydraulic pressure. The spring 94 is supported in a manner wound around the outer periphery of the spring pressing piece 88.

[0075] As described above, the spray gun 10 and the head 60 are constructed.

[0076] (Effect)

[0077] Fig. 9A is a top cross-sectional view of a state where the valve 90 blocks the first flow path 81 and the second flow path 82 respectively. Fig. 9B This is a top cross-sectional view of a state in which the valve of the first flow path is opened by the first liquid and the valve of the second flow path is closed.

[0078] First, when the operator holds the spray gun 10 and presses only the front end portion 76 of the nozzle 70 against the sprayed portion, the first liquid and the second liquid are not pressure-fed from the container 40, so that the inside of the spray gun 10 is maintained. Fig. 9A The switch 22 of the spray gun 10 is maintained in the off position.

[0079] Next, when the operator moves the switch 22 of the spray gun 10 to the on position, power is supplied from the battery 24 to drive the pump 30. When the pump 30 is driven, the first liquid and the second liquid are alternately sucked up from the container 40, flow alternately in the first flow path 81 and the second flow path 82, and the valve body 92 of the valve 90 is pressed.

[0080] If the hydraulic pressure of at least one of the first liquid and the second liquid exceeds the specified load of the spring 94, the spring 94 is further compressed, the valve body 92 leaves the tapered portion 811 or the tapered portion 821, and the spring 94 enters the valve-opening state. In the flow path where the spring 94 enters the valve-opening state, the first liquid or the second liquid flows into the interior of the valve plug 80, passes through the spring pressing member 88 downstream of the valve 90, and reaches the cylindrical portion 72 of the nozzle 70. Fig. 9B The example shown shows a state where the first liquid F1 opens the valve 90 and the second liquid F2 does not open the valve 90. The pump 30 independently and alternately pumps the first liquid F1 and the second liquid F2 to the head 60, so that at the next time point, the second liquid F2 opens the valve 90 and the first liquid F1 does not open the valve.

[0081] When the first liquid and the second liquid that are independently and alternately pumped merge at the twisted portion 721 of the cylindrical portion 72 , a mixed liquid of the first liquid and the second liquid is injected into the ejection portion from the front end portion 76 .

[0082] After the mixed liquid is injected into the ejection portion, if the operator moves the switch 22 of the spray gun 10 to the off position, at least the mixed liquid of the first liquid and the second liquid exists inside the head 60. Since the mixed liquid has curing properties, if left alone, it gradually solidifies inside the nozzle 70, and finally the nozzle 70 solidifies. Once the nozzle 70 solidifies, even if the operator moves the switch 22 of the spray gun 10 to the on position again, new mixed liquid will not be supplied to the nozzle 70.

[0083] In the spray gun 10 and the head 60 according to the present embodiment, since the valve plug 80 is configured to include the valve 90 , it is possible to suppress damage to the spray gun 10 body caused by the mixed liquid flowing back to the upstream side of the valve plug 80 and solidifying.

[0084] Next, valves 90 are provided in the first flow path 81 and the second flow path 82. This configuration can prevent the mixed liquid of the first liquid and the second liquid from flowing back to the flow path without valve 90 and damaging the spray gun 10 body due to the entire valve plug 80 solidifying.

[0085] Next, the valve stopper 80 has a wall 83 formed in the installation area of ​​the valve 90 and separating the first flow path 81 from the second flow path 82. According to the above structure, since the liquids exist in an unmixed state in the installation area of ​​the valve 90, solidification of the mixed liquid inside the valve stopper 80 can be suppressed.

[0086] Next, the valve plug 80 has the spring pusher 88 of the above-described structure. According to this structure, the number of parts can be reduced compared to a structure in which a part responsible for supporting the valve 90 and a part responsible for supplying each liquid to the nozzle 70 are separate.

[0087] Next, the nozzle 70 of the spray gun 10 is detachably mounted on the valve plug 80 of the above structure. According to this structure, when solidification occurs only inside the nozzle 70, the valve plug 80 can be removed from the nozzle 70 and only the nozzle 70 can be replaced.

[0088] Furthermore, the spray gun 10 has the cover 78 of the above structure. According to this structure, when the nozzle 70 is inserted into the ejected portion, the cover 78 bites into the ejected portion, so even if it is ejected at a high pressure, the mixed liquid can be stably ejected to the ejected portion compared to a structure in which the cover is not installed on the outer periphery of the front end of the nozzle 70.

[0089] Furthermore, the head 60 for the spray gun 10 can be installed at the outlet of the pump 30, and comprises: a valve plug 80, having: a first flow path 81, capable of pressurizing a first liquid from the first equipment side flow path 521 of the pump; a second flow path 82, capable of pressurizing a second liquid solidified by mixing with the first liquid from the second equipment side flow path 522 of the pressurizing portion; a valve 90, arranged in at least one of the first flow path 81 and the second flow path 82; a wall 83, formed in the setting area of ​​the valve 90, separating the first flow path 81 and the second flow path 82; and a nozzle 70, mixing and spraying the first liquid and the second liquid flowing in from the valve plug 80.

[0090] According to the above configuration, when a plurality of liquids that solidify by mixing are pressure-fed, the cleaning range of the pump 30 can be limited compared to a configuration that cleans the entire pump 30 .

[0091] (Variation Example)

[0092] Although the present disclosure has been described in detail with respect to specific embodiments, it is obvious to those skilled in the art that the present disclosure is not limited to these embodiments and the present disclosure can adopt other various embodiments within the scope of the present disclosure.

[0093] Although the material is described in part of the configuration of this embodiment, a material different from the material may be used. For example, a metal may be used instead of a resin portion.

[0094] The battery 24 is provided below the grip 20, but the present invention is not limited thereto. For example, the battery 24 may be built into the grip 20, or power may be supplied from an external power source via a power cord.

[0095] The pump 30 is an electric pump, but is not limited thereto. For example, a hydraulic pump, a pneumatic pump, or the like may be used.

[0096] The container 40 may be provided with a plurality of containers corresponding to the types of liquids, or a partition may be provided on one container to divide the container. In addition, the container 40 has flexibility, but is not limited thereto.

[0097] The support portion 50 is independently provided with an equipment side ejection portion 52 and a socket base 56, but the invention is not limited thereto. For example, the equipment side ejection portion 52 may also independently have the function of the socket base 56. In this case, it is expected that the number of components may be reduced or the weight may be reduced. In addition, the nut portion 58 in the support portion 50 fixes the support portion 50 and the head portion 60, but the invention is not limited thereto. For example, a clamping portion may be provided on the support portion 50, and a clamped portion may be provided on the head portion 60, and the clamping portion and the clamped portion may be directly clamped. In this case, it is expected that the number of components may be reduced or the weight may be reduced.

[0098] Regarding the shape of the cover 78, the cylindrical body is not limited to being mounted on the outer periphery of the front end portion 76. For example, a block-shaped body having a through hole provided inside thereof may be mounted on the outer periphery of the front end portion 76.

[0099] The spring pressing member 88 is a cross-shaped plate, but is not limited thereto. For example, it may be a polygon such as a star.

[0100] The valve 90 uses a compression coil spring, but is not limited to this. As long as it is a structure that applies force from the downstream side to the upstream side of the liquid flow, other springs may also be used. The valve 90 is supported by the spring pressing member 92, but is not limited to this. For example, the valve 90 may be supported by the inner wall of the valve plug 80.

Claims

1. A tool for spraying multiple liquids, comprising: A gripping portion, which is gripped by an operator; A pressure-feeding portion, disposed on the holding portion, and independently and alternately pressure-feeding the first liquid and the second liquid by driving; The frame is detachably mounted on the outlet of the pressure-feeding unit, and comprises: a first flow path for pressure-feeding the first liquid from the first outlet of the pressure-feeding unit; and a second flow path for pressure-feeding the second liquid from the second outlet of the pressure-feeding unit; and a check valve disposed in at least any one of the first flow path and the second flow path; and The nozzle mixes the first liquid and the second liquid flowing from the frame and ejects the mixed liquid.

2. The multi-liquid mixing and jetting tool according to claim 1, wherein: The check valves are respectively provided in the first flow path and the second flow path.

3. The multi-liquid mixing and jetting tool according to claim 1, wherein: The frame has a wall portion that is formed in a region where the check valve is provided and that separates the first flow path from the second flow path.

4. The multi-liquid mixing and jetting tool according to claim 1, wherein: The frame has a plate shape, a portion of which supports the check valve and another portion of which allows the first liquid and the second liquid to flow to the nozzle.

5. The multi-liquid mixing and jetting tool according to claim 1, wherein: The nozzle is detachably mounted on the frame.

6. The multi-liquid mixing and jetting tool according to any one of claims 1 to 5, wherein: The multi-liquid mixing and ejecting tool has an elastic body attached to the outer periphery of the front end of the nozzle.

7. A head of a tool for mixing and ejecting multiple liquids, which can be mounted on an outlet of a pressure-feeding portion of the tool for mixing and ejecting multiple liquids, the head of the tool for mixing and ejecting multiple liquids comprising: The frame has: a first flow path through which a first liquid can be pressure-fed from a first outlet of the pressure-fed portion; and a second flow path through which a second liquid solidified by mixing with the first liquid can be pressure-fed from a second outlet of the pressure-fed portion. a check valve provided in at least one of the first flow path and the second flow path; and a wall portion formed in a region where the check valve is provided and separating the first flow path from the second flow path; and The nozzle mixes the first liquid and the second liquid flowing from the frame and ejects the mixed liquid.

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