JP5718775B2 - Two-fluid spraying device - Google Patents

Description

  The present invention relates to a two-fluid spraying device, and more particularly to a structure in which a unit into which a gas and a liquid are introduced is connected to a two-fluid mixing unit with a simple structure.

  In general, gas and liquid piping, two-fluid mixing unit where both pipes merge, and two mixed fluid There is an on-off valve that opens and closes the jet part and the pipe of the gas pipe, and each connection of the gas pipe and the two-fluid mixing part and the liquid pipe and the two-fluid mixing part is performed by screwing of screws or nuts. It is known. An example of this type of apparatus is described in Document 1.

  Also, a two-fluid mixing unit that has a gas pipe and a liquid pipe, includes an on-off valve that opens and closes these pipe lines, and mixes gas and liquid supplied from both pipes, and a tip of the two-fluid mixing unit Also known are those provided with a jet part of the mixed two fluids formed or connected to each other. An example of this type of apparatus is described in Document 2.

Utility model registration No. 3087923 Japanese Patent No. 3727880

  In the apparatus described in Patent Document 1, each connection between the gas pipe and the two-fluid mixing unit and between the liquid pipe and the two-fluid mixing unit is performed by screwing of an internal screw and an external screw provided to each other. Yes. Further, in the apparatus described in Patent Document 2, the gas introduction tube is connected to the two-fluid mixing unit, and the liquid introduction tube is also fixed to the two-fluid mixing unit. The means to complement are not clear. When gas and liquid are mixed in the same device and ejected forward, high pressure is generated inside the device, so the connection mode and strength between each pipe and the two-fluid mixing unit are problematic, but in such cases In general, a method of connecting a male screw and a female screw between each other, a connection by welding, or the like is employed. However, the above-described method has a problem that in the manufacturing process of the two-fluid spray device, steps such as threading of each member and welding of the connection portion are involved and the cost is increased.

  Therefore, the present invention solves the above-described problems, and the problem is that a unit in which a gas and a liquid are introduced is connected to a two-fluid mixing unit with a simple structure, and each fluid has sufficient connection strength. It is to provide a spraying device.

In view of such circumstances, the two-fluid spraying device of the present invention is a trigger that is assembled from the rear part of the pipe part to the inside, the gas inlet pipe, the liquid inlet pipe, the pipe part having the gas outlet and the liquid outlet. unit having a two-fluid co-off valve which is opened and closed by, as well as pneumatically joints and liquid feed joint, as well as two-fluid mixing portion having a gas inlet and a liquid inlet port, as well as, comprises a housing, said The air feeding joint and the liquid feeding joint are connected between the unit and the two-fluid mixing unit in a posture having mutually parallel axes, and the connection direction to the unit and the two-fluid mixing unit is both is the same direction as the axis, the joint is removably inserted is in the connecting direction both its ends for the gas inlet and the gas outlet port feeding the gas Are connected by a state, the liquid feed joint is connected the state in which the are inserted detachably in the connection direction both ends thereof against the said liquid inlet and said liquid outlet, said housing said unit , the gas feed joint, the liquid feed joint, and has a structure to fit the shape of the two-fluid mixing portion are combined inside abutting portion from the front and rear sides of the connecting direction with respect to the unit When, the two with respect to fluid mixing unit from the front and rear sides of the connecting direction abutting portion separately, the connection direction of the joint feed inside the unit and the two-fluid mixing unit feeding the gas joints and the liquid It is characterized by gripping each .

  According to the present invention, the air feed joint is in a state where both ends thereof are detachably connected at the gas outlet and the gas inlet, and the liquid joint is also detachably connected at the liquid outlet and the liquid inlet. However, since the housing grips the unit and the two-fluid mixing part in the connecting direction of the air-feeding joint and the liquid-feeding joint, the air-feeding joint and the liquid-feeding joint are placed between the unit and the two-fluid mixing part. Retained / connected state is maintained. This eliminates the need for a male screw and a female screw between the units and the connection between the unit and the two-fluid mixing unit, and connection by welding, simplifying the manufacturing process and reducing costs. There is an effect.

In the present invention, the pneumatic joint has an outer diameter that approximates to an inner diameter of the gas outlet and the gas inlet, and an outer peripheral surface in each range connected to the gas outlet and the gas inlet. At least one or more annular grooves are provided around the axis, and O-rings are fitted in the annular grooves, respectively, and the liquid feed joint has outer diameters of the liquid outlet and the liquid inlet. At least one or more annular grooves are provided around the axis in the respective ranges connected to the liquid outlet and the liquid inlet on the outer peripheral surface, and an O-ring is fitted in each annular groove. It is desirable to be rare.
According to this, the air feeding joint and the liquid feeding joint can reduce gaps at the connection locations of both the unit and the two-fluid mixing unit, and the O-rings achieve sealing at each connection location. As a result, the gas and liquid can be prevented from leaking with a simple structure.

Further, in the present invention, a narrowed portion that is in contact with the end portion of the air feeding joint is formed inside the gas outlet port, and a first reduced diameter portion that is in contact with the other end portion of the air feeding joint inside the gas inlet port. And a constricted portion that is in contact with the end of the liquid feed joint is formed inside the liquid outlet, and a reduced diameter portion that is in contact with the other end of the liquid feed joint is formed in the liquid inlet. It is desirable that is formed.
According to this, since the air feeding joint and the liquid feeding joint are restricted from moving in the front-rear direction between the unit and the two-fluid mixing unit, the air feeding joint and the liquid feeding joint are regulated. There is an effect that a stable connection state of the joint is maintained.

In the present invention, the housing includes a barrel portion, a handle portion, and a trigger guard portion, and the trigger guard portion includes a trigger guard front frame and a trigger guard lower frame, The frame extends downward from the barrel portion, the trigger guard lower frame extends forward from the lower end portion of the handle portion, intersects with the trigger guard front frame, and extends from the lower rear portion of the barrel portion to the handle portion. It is preferable that a gap is provided between the portion and the trigger guard lower frame, and that the tip of the trigger extends to the gap of the trigger guard lower frame.
According to this, the dimension which can put four fingers except the thumb of a human hand is ensured in the frame of the trigger guard part. And since the front-end | tip part of the said trigger is extended to the gap | interval of the said trigger guard lower frame, the dimension of the grade which can put four fingers also on the said trigger is ensured. As a result, the operability of the two-fluid spraying measure is improved, and for example, even a hand with a glove or the like can be reliably sprayed.
Further, the gap between the rear lower part of the barrel part and the handle part, and the gap of the trigger guard lower frame allow the trigger to reciprocate in the horizontal direction, while the right and left crossing perpendicular to the horizontal direction. Since movement in the direction is not allowed, even if the trigger is operated violently, the influence of swinging the unit or the two-fluid mixing unit inside the housing is reduced. Furthermore, there is an effect that the strength of the connecting portion of the two-fluid simultaneous opening / closing valve of the trigger is also compensated.

  As described above, according to the present invention, it is possible to connect a unit and a two-fluid mixing unit with a simple structure and mix and eject gas and liquid while ensuring sufficient connection strength. A simple two-fluid spraying device can be provided.

The expansion | deployment perspective view of embodiment of the two-fluid spraying apparatus which concerns on this invention. The side view which shows the state except the left side housing of the embodiment. The front view of the unit of the embodiment. The rear view of the unit of the embodiment. The sectional side view which looked at the unit of the embodiment in the AA 'line direction of FIG. 3 or FIG. Sectional drawing which looked at the piping part of the embodiment in the BB 'line direction of FIG. 3 or FIG. Sectional drawing which looked at the piping part of the embodiment in CC 'line direction of FIG. 3 or FIG. The sectional side view of the pneumatic joint of the embodiment. The sectional side view of the liquid feeding joint of the embodiment. The front view of the two fluid mixing part of the embodiment. The rear view of the two fluid mixing part of the embodiment. The sectional side view of the two fluid mixing part of the embodiment.

  Hereinafter, a two-fluid spray device 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a developed perspective view of an embodiment of a two-fluid spraying device 1 according to the present invention, FIG. 2 is a side view showing a state excluding the left side of a housing 60 of the embodiment, and FIG. FIG. 12 is a side sectional view of the two-fluid mixing unit 50 of the same embodiment.

  This two-fluid spraying device 1 is assembled from the rear part of the piping part 23 to the inside by the gas inlet pipe 21, the liquid inlet pipe 22, the gas outlet 23e and the liquid outlet 23j, and the trigger 27. A unit 20 having a two-fluid simultaneous opening / closing valve 24 that is opened and closed, a pneumatic joint 3 and a liquid feeding joint 4, a two-fluid mixing unit 50 having a gas inlet 53d and a liquid inlet 54a, and A housing 60 is provided. The housing 60 is adapted to be gripped inside in conformity with the combined shape of the unit 20, the air feeding joint 3, the liquid feeding joint 4, and the two-fluid mixing unit 50.

  First, the configuration of the unit 20 will be described below. As shown in FIG. 4, the unit 20 is installed from the rear part to the inside of the gas introduction pipe 21, the liquid introduction pipe 22, the pipe part 23 that receives the gas introduction pipe 21 and the liquid introduction pipe 22, and the pipe part 23. The two-fluid simultaneous open / close valve 24 (see FIG. 5) is provided.

  The gas introduction pipe 21 is made of a cylindrical metal, and has a male pipe joint 21a at the rear as shown in FIGS. 1 and 2, and an air supply hose (not shown) for supplying gas from a high-pressure gas supply source. ). A male screw is formed in front of the gas introduction pipe 21. The liquid introduction pipe 22 is also made of a cylindrical metal and has a male pipe joint 22a on the rear side (see FIG. 1), which is connected to the tip of a liquid supply hose (not shown) for supplying liquid from a liquid supply source. It comes to match. A male screw is also formed in front of the liquid introduction tube 22.

  As shown in FIGS. 1 to 5, the pipe portion 23 has a pipe portion rearward protruding portion 23 k that protrudes from the rear upper portion and extends rearward as it is. Further, at the rear end of the pipe portion 23, a gas inlet 23a is opened on the left side in the flow path direction, and a liquid inlet 23f is opened on the right side. Both inlets are cylindrical, and an internal thread is formed on the inner wall. Then, the male screw in front of the gas introduction tube 21 and the female screw of the gas introduction port 23a are screwed to fix both. Similarly, the liquid introduction tube 22 and the liquid introduction port 23f are screwed and fixed. The back side of the part where the female screw of the gas inlet 23a is formed, that is, the downstream side of the flow path, becomes the gas communication path 23b as it is and extends to the front of the pipe part 23. Further, the downstream side of the part where the female screw of the liquid introduction port 23f is formed becomes a liquid communication path 23g and extends forward of the piping part 23. The axes of both connecting paths are substantially parallel to the left and right.

  The piping part 23 has two openings at the front end as shown in FIG. Both openings are cylindrical and extend in the front-rear direction of the pipe portion 23, and the respective axes are substantially parallel in the vertical direction. Among these, the lower opening is the gas outlet 23e, and the upper opening is the liquid outlet 23j.

  The gas outlet 23 e has an inner diameter that approximates the outer diameter of the pneumatic joint 3. As shown in FIG. 6, a gas valve chamber 23 c is provided upstream of the gas outlet 23 e and opens to the rear end of the pipe portion 23. A narrowed portion 23d having an inner diameter smaller than the diameter of the gas outlet 23e is formed between the gas outlet 23e and the gas valve chamber 23c. The narrowed portion 23d is formed in such a manner that the inner wall of the boundary portion between the gas outlet 23e and the gas valve chamber 23c protrudes and is continuous around the axis. Therefore, the narrowed portion 23d has a convex shape between the gas outlet port 23e and the gas valve chamber 23c in a side sectional view.

  The liquid outlet 23j has an inner diameter that approximates the outer diameter of the liquid feed joint 4. As shown in FIG. 7, a liquid valve chamber 23 h is provided upstream from the liquid outlet 23 j and opens to the rear end of the pipe portion 23. A narrowed portion 23i having an inner diameter smaller than the diameter of the liquid outlet 23j is formed between the liquid outlet 23j and the liquid valve chamber 23h. The narrowed portion 23i is formed in such a manner that the inner wall of the boundary portion between the liquid outlet 23j and the liquid valve chamber 23h protrudes and is continuous around the axis. Therefore, the narrowed portion 23i has a convex shape between the liquid outlet port 23j and the liquid valve chamber 23h in a side sectional view.

  Here, the relationship between the two communication paths 23b and 23g and the valve chambers 23c and 23h will be described. The gas communication path 23b shown in FIG. 6 passes through the left side of the pipe part 23, and inclines in the diagonally lower right direction inside the pipe part 23 and communicates with the gas valve chamber 23c. Then, the liquid communication path 23g shown in FIG. 7 passes through the right side of the pipe part 23, and inclines in the diagonally upper left direction inside the pipe part 23 and communicates with the liquid valve chamber 23h. A state in which the gas communication path 23b and the liquid communication path 23g are skewed inside the pipe portion 23 is indicated by a dotted line in FIG.

  In the present embodiment, the gas introduction pipe 21 and the gas communication path 23b are arranged on the left side of the unit 20 in the flow direction, and the liquid introduction pipe 22 and the liquid communication path 23g are arranged on the right side. Depending on the arrangement and design, the introduction pipes 21, 22 and the corresponding communication paths 23b, 23g can be reversed. In this case, the gas communication path 23b that passes through the right side of the piping section 23 must be inclined in the diagonally lower left direction to communicate with the gas valve chamber 23c. Further, the liquid communication path 23g that passes through the left side of the pipe section 23 must be inclined in the upper right direction to communicate with the liquid valve chamber 23h.

  The two-fluid simultaneous opening / closing valve 24 includes a gas valve chamber opening / closing valve 25, a liquid valve chamber opening / closing valve 26, and a trigger 27 for operating both opening / closing valves simultaneously. As shown in FIG. The liquid valve chamber 23 h is integrally assembled from the opening portion at the rear end of the pipe portion 23.

  First, the gas valve chamber opening / closing valve 25 includes a base portion 25a, a valve shaft 25b, a valve body portion 25c, an urging means 25d, and the like. The base 25a is screwed into the inside from the rear end (upstream side) of the gas valve chamber 23c and is fixed. A valve shaft 25b is inserted through the center of the base 25a. The valve shaft 25b extends to the front (downstream side) of the gas valve chamber 23c, and forms a valve body portion 25c having an enlarged diameter near the narrowed portion 23d. The valve body portion 25c has an outer diameter that can slide within the cylinder of the gas valve chamber 23c. An urging means 25d such as a spring is provided between the base portion 25a and the valve body portion 25c so as to surround the valve shaft 25b, and urges the valve shaft 25b toward the closed position. A packing 25e is attached to the tip of the valve body 25c with a screw or the like. Therefore, when the valve is closed, the packing 25e is in close contact with the constricted portion 23d to maintain the sealing property of the gas valve chamber 23c. Even when the gas valve chamber opening / closing valve 25 is closed, the rear (upstream direction) portion of the valve shaft 25b protrudes rearward from the base portion 25a.

  Next, the liquid valve chamber opening / closing valve 26 also includes a base portion 26a, a valve shaft 26b, a valve body portion 26c, an urging means 26d, and the like. The base portion 26a is screwed and fixed inside from the rear end portion of the liquid valve chamber 23h, the valve shaft 26b is inserted through the center of the base portion 26a, and a valve body portion 26c is formed in front of the valve shaft 26b. A biasing means 26d such as a spring is provided between the base portion 26a and the valve body portion 26c so as to surround the valve shaft 26b, and biases the valve shaft 26b toward the closed position. A packing 26e is attached to the tip of the valve body portion 26c with a screw or the like, and the packing 26e is in close contact with the constriction portion 23i when the valve is closed to maintain the hermeticity of the liquid valve chamber 23h. Even when the liquid valve chamber opening / closing valve 26 is closed, the rear side (upstream direction) of the valve shaft 26b protrudes rearward from the base portion 26a. The configuration and mode of the liquid valve chamber opening / closing valve 26 are the same as those of the gas valve chamber opening / closing valve 25.

  The trigger mounting mode is as follows. First, two washers 28 are sandwiched from the left and right as shown in FIG. 4 at the rear portions of both valve shafts 25b, 26b protruding from both bases 25a, 26a of the gas valve chamber opening / closing valve 25 and the liquid valve chamber opening / closing valve 26. Is installed. Thus, both valve shafts 25b and 26b are connected by the two washers 28. Further, as shown in FIG. 5, one end of a metal plate 29 is interposed between two washers 28 and at an intermediate position so as to be pivotally connected, and the other end of the metal plate 29 is pivotable with a trigger 27. Connect to In the trigger 27, a base end portion that is above the connecting portion with the metal plate 29 is rotatably connected to the pipe portion rearward protruding portion 23k. In addition, a portion below the connection portion of the trigger 27 with the metal plate 29 is an operation portion. In consideration of convenience during operation, it is desirable to secure a wide enough dimension for four fingers except the thumb of a human hand.

  The two-fluid simultaneous opening / closing valve 24 has the above-described structure, and when the trigger 27 is manually rotated in the horizontal direction indicated by the arrow A between the closed position a and the open position b shown in FIG. 25 and the liquid valve chamber opening / closing valve 26 operate simultaneously, and the gas valve chamber 23c and the liquid valve chamber 23h are opened and closed simultaneously. The degree of pulling of the trigger 27 makes it possible to adjust the degree of opening and closing of the conduits of the valve chambers 23c and 23h, so that the introduced gas and liquid are led out to the front of the unit 20 while adjusting the amount. be able to.

  Next, the configuration of the air feeding joint 3 and the liquid feeding joint 4 will be described. The pneumatic joint 3 shown in the sectional view of FIG. 8 is made of a cylindrical metal member and has a hollow portion in the longitudinal direction. Further, the outer diameter of the pneumatic joint 3 approximates the inner diameter of the gas outlet 23e. At least one or more annular grooves 3a formed around the axis are provided at both ends in the longitudinal direction on the outer peripheral surface of the pneumatic joint 3. In the present embodiment, two annular grooves 3 a are provided at both ends of the pneumatic joint 3. One of these annular grooves 3a is in a range in which the pneumatic joint 3 is accommodated in the gas outlet 23e (see FIGS. 5 and 6), and the other is in a range in which the mixture gas inlet 53d described later is accommodated (see FIG. 5). 12). O-rings 3b made of rubber or the like are fitted in these annular grooves 3a. When the pneumatic joint 3 is connected to the gas outlet 23e in a state where it can be inserted and removed (see FIGS. 1 and 5), the gap between the pneumatic joint 3 and the gas outlet 23e is small, and the O-ring 3b. As a result, the connecting portion is sealed. Further, since the constricted portion 23d is present, the movement of the pneumatic joint 3 toward the gas valve chamber 23c is restricted.

  The liquid feed joint 4 shown in the sectional view of FIG. 9 is made of a cylindrical metal member and has a hollow portion in the longitudinal direction. Further, the outer diameter of the liquid feeding joint 4 is approximate to the inner diameter of the liquid outlet port 23j. On the outer peripheral surface of the liquid feed joint 4, at least one or more annular grooves 4a formed around the axis are provided at both ends in the longitudinal direction. In the present embodiment, two annular grooves 4 a are provided at both ends of the liquid feed joint 4. One of these annular grooves 4a is a range in which the liquid feed joint 4 is accommodated in the liquid outlet port 23j (see FIGS. 5 and 7), and the other is in a range in which the liquid feed joint 4 is accommodated in the mixing portion liquid introduction port 54a described later (FIG. 12). See). An O-ring 4b made of rubber or the like is fitted in these annular grooves 4a. When the liquid feed joint 4 is connected to the liquid outlet port 23j in a state where it can be inserted and removed (see FIGS. 1 and 5), the gap between the liquid feed joint 4 and the liquid outlet port 23j is small, and the O-ring 4b. As a result, the connecting portion is sealed. Further, since the constricted portion 23i is present, the liquid feed joint 4 is restricted from moving toward the liquid valve chamber 23h.

  In the present embodiment, the inner diameters of the gas outlet port 23e and the liquid outlet port 23j are both the same, and the outer diameters of the air feeding joint 3 and the liquid feeding joint 4 are also the same diameter. . In the present embodiment, as will be described later, when the constituent members are stored in an assembled state inside the housing 60, the air feeding joint 3 and the liquid feeding joint 4 have postures having axes parallel to each other. And connected between the unit 20 and the two-fluid mixing unit 50. Here, the axial direction of both joints is the same as the connection direction, and is the same longitudinal direction as the jet direction of the two fluids.

  Next, the two-fluid mixing unit 50 will be described. As shown in the side sectional view of FIG. 12, the two-fluid mixing unit 50 is formed in front of the cylindrical mixing unit main body 51 having the tip side (downstream side) having a tapered tapered part 51a and the tapered part 51a. The two-fluid ejection part 52, the air socket 53 disposed inside from the rear end of the mixing part main body 51, and the water socket 54 protruding from the upper part of the mixing part main body 51 are provided.

  The air socket 53 has a taper shape after the diameter of the base portion 53a screwed with the inner wall of the rear end portion of the mixing portion main body 51 and the front portion inside the mixing portion main body 51 is extended from the central portion of the base portion 53a and once expanded. And a tapered cylindrical portion 53b. The tapered cylindrical portion 53b extends within the mixing portion main body 51 to the vicinity of the mixing portion main body tapered portion 51a. There is a space 55 between the inner wall of the mixing unit main body 51 and the tapered cylinder part 53b. The space 55 passes between the 51 tapered part 51a and the tapered cylinder part 53b and continues to the two-fluid ejection part 52. ing. As shown in FIGS. 10 and 12, the two-fluid ejection portion 52 is a cylindrical portion extending forward from the tapered portion 51 a of the mixing portion main body 51, and a male screw is formed on the outer surface. The screw is a portion into which the nozzle tip 56 shown in FIG. 1 or 2 is screwed.

The air socket 53 has, on the base 53a side, an air socket lid portion 53c that is exposed to the outside (upstream side) of the rear end of the mixing unit main body 51 (see FIGS. 2 and 12). In the center of the air socket lid portion 53c, a mixing portion gas introduction port 53d having an inner diameter approximate to the outer diameter of the air feeding joint 3 is opened. A mixing portion gas communication path 53e having a first reduced diameter portion 53f having a diameter smaller than that of the mixing portion gas introduction port 53d extends to the back side (downstream side) of the mixing portion gas introduction port 53d. 53e forms the second reduced diameter portion 53g near the two-fluid ejection portion 52 and then opens to the two-fluid ejection portion 52. The first reduced diameter portion 53f and the second reduced diameter portion 53g have a structure in which the pressure of the air ejected is increased.
The other end side of the air feeding joint 3 connected to the gas outlet port 23e is detachably connected to the mixing unit gas inlet port 53d. The pneumatic joint 3 is restricted from moving forward of the air socket 53 by the first reduced diameter portion 53f. And the connection part of the pneumatic joint 3 and mixing part gas piping is sealed by the O-ring 3b fitted in the annular groove 3a on the outer peripheral surface.

As shown in FIGS. 10 to 12, the water socket 54 is formed integrally with the mixing unit main body 51 in a manner protruding from the upper part of the mixing unit main body 51. The rear end (upstream side) of the water socket 54 coincides with the line of the rear end of the mixing unit main body 51. As shown in FIG. 11, on the rear end side of the water socket 54, a mixing unit liquid introduction port 54 a having an inner diameter that is similar to the outer diameter of the liquid feeding joint 4 is opened. A mixing portion liquid communication path 54c having a reduced diameter portion 54b having a diameter smaller than that of the mixing portion liquid introduction port 54a extends to the back side (downstream side) of the mixing portion liquid introduction port 54a and bends downward. 51 is opened to a space 55 inside.
The other end side of the liquid feed joint 4 connected to the liquid outlet port 23j is detachably connected to the mixing unit liquid inlet port 54a. The liquid feed joint 4 is restricted from moving forward of the water socket by the reduced diameter portion 54b in the mixing portion liquid introduction port 54a. And the connection part of the liquid feeding joint 4 and the mixing part liquid inlet 54a is sealed by the O-ring 4b fitted in the annular groove 4a on the outer peripheral surface.

  As shown in FIG. 2, in the present embodiment, the air socket lid portion 53 c is exposed to the upstream side of the rear end portion of the mixing portion main body 51 and is in close contact with the gas outlet port 23 e. Therefore, the pneumatic joint 3 does not have to have a long dimension in the longitudinal direction, and the longitudinal dimension of the pneumatic joint 3 is somewhat shorter than that of the liquid joint 4. Depending on the dimensions, the exposed portion between the gas outlet 23e and the air socket lid 53c can be made very small as in the illustrated example.

  According to the above configuration, the air is supplied to the unit 20 and the pneumatic joint 3 by a simple structure in which the pneumatic joint 3 and the liquid feeding joint 4 are detachably connected between the unit 20 and the two-fluid mixing unit 50. The two fluid mixing parts 50 can pass through without leaking. Similarly, the liquid can pass through the unit 20, the liquid feed joint 4, and the two-fluid mixing unit 50 without leaking. However, with these elements alone, the unit 20 and the two-fluid mixing unit 50 are not firmly connected and fixed in the front-rear free direction in which the air feeding joint 3 and the liquid feeding joint 4 are connected. This is because when the two-fluid spraying device 1 is actually operated, a high pressure is generated in the device, and a force that separates both the unit 20 and the two-fluid mixing unit 50 from the joints 3 and 4 works. In order for the two-fluid spraying device 1 according to the present embodiment to exert its effects, a housing 60 for holding and fixing the unit 20, the two-fluid mixing unit 50, the air feeding joint 3 and the liquid feeding joint 4 is prepared.

  As shown in FIG. 1, the housing 60 is configured such that the integrally formed halves are combined from the left and right, and the above-described unit 20, the air feeding joint 3, the liquid feeding joint 4, and the two-fluid mixing unit 50 are combined. A structure adapted to a series of shapes is provided on the inside, and the screws 61 are screwed in place to fix each other. Considering that the two-fluid spray device 1 according to the present embodiment is used as a fire extinguisher in a fire site, the housing 60 is designed to withstand a high-temperature site environment and withstand high pressure generated inside the fire extinguisher. Is preferably made of metal.

  The housing 60 has a gun shape as shown in FIG. 1 and includes a barrel part 62, a handle part 63, and a trigger guard part 64. FIG. 2 is a side view showing a state in which the left housing of the two-fluid spraying device 1 of the present embodiment is removed, but the unit 20, the air feeding joint 3, the liquid feeding joint 4, and the two-fluid mixing unit 50 are assembled. It is positioned by the housing barrel portion 62 in a state of being held.

  In front of the barrel portion 62, a gap 62 a that allows the two-fluid ejection portion 52 to escape is provided. As a result, the two-fluid ejection portion 52 and the nozzle tip 56 screwed therein are exposed forward of the housing 60. In addition, a gap 62 b through which the gas introduction pipe 21 and the liquid introduction pipe 22 are escaped is provided behind the barrel portion 62. Thereby, the male pipe joint 21a of the gas introduction pipe 21 and the male pipe joint 22a of the liquid introduction pipe 22 are exposed to the rear of the housing 60, and the connection of the hose of the high pressure gas supply source and the liquid supply source is also performed in the housing 60. Can be done on the outside.

The housing barrel portion 62 is a portion that contacts the unit 20 as an inner surface portion 62c that contacts the front end portion of the liquid outlet 23j, inner surface portions 62d and 62e that contact the front end portion and the rear end portion of the pipe portion rearward protruding portion 23k, And it has the inner surface part 62f contact | abutted to the rear-end part of the gas valve chamber 23c.
Further, the barrel portion 62 is a portion that contacts the two-fluid mixing portion 50, and includes an inner surface portion 62g that contacts the rear end portion of the mixing portion main body 51, an inner surface portion 62h that contacts the tapered portion 51a, and a front end portion of the water socket 54. And inner surface portions 62i and 62j that come into contact with the rear end portion.

The housing 60 has the upper and lower portions of the unit 20 and the two-fluid mixing unit 50 in the front-rear direction (pneumatic joint 3) by the gaps 62a and 62b and the inner surface portions 62c, 62d, 62e, 62f, 62g, 62h, 62i, and 62j. And the connecting direction of the liquid feed joint 4).
Here, the inner surface portions 62e, 62f, 62h, and 62i regulate the positions of the unit 20 and the two-fluid mixing unit 50 with respect to the direction in which they are separated from each other, and hold them so as not to separate in the front-rear direction. . On the other hand, the other inner surface portions 62c, 62d, 62g, and 62j regulate the positions of the unit 20 and the two-fluid mixing unit 50 with respect to the directions approaching each other, and hold the two so as not to approach in the front-rear direction. .
The housing 60 also grips a series of internal elements from the left and right by a structure in which the left and right halves are combined and the screws 61 are screwed in place and fixed together. As a result, the internal elements such as the unit 20 and the two-fluid mixing unit 50 that are connected via the air feeding joint 3 and the liquid feeding joint 4 are gripped and fixed in the front, rear, top, bottom, left and right directions inside the housing 60. .

As shown in FIG. 2, the trigger guard portion 64 includes a trigger guard front frame 64 a and a trigger guard lower frame 64 b, and is integrally formed with the barrel portion 62 and the handle portion 63. The trigger guard front frame 64 a extends downward from the barrel part 62 and has the same size as the vertical dimension of the handle part 63 extending downward from the barrel part 62. The trigger guard front frame 64a is subjected to a lightening process for weight reduction. The trigger guard lower frame 64b is formed by extending the frame portion forward from the lower end portion of the handle portion 63 and intersects the trigger guard front frame 64a.
As a result, a wide dimension is secured within the frame of the trigger guard part 64 defined by the trigger guard front frame 64a and the trigger guard part 64 so that four fingers other than the thumb of a human hand can be inserted.

  Further, a gap 65 is provided in a portion from the rear lower part of the barrel part 62 to the handle part 63, and a gap 66 is also provided in the trigger guard lower frame 64b. The trigger 27 passes through the gap 65, and its tip reaches the gap 66. These gaps 65 and 66 allow a horizontal movement (see FIG. 5) when the trigger 27 is rotated.

  When operating the two-fluid spraying device 1 of the present embodiment, the tip of a gas hose connected to a backpack-type high-pressure gas supply source is connected to the gas introduction pipe 21 via a pipe joint 21a, The tip of the liquid hose connected to the liquid supply source is connected to the liquid introduction pipe 22 through a pipe joint 22a. Then, air and water can be supplied to the two-fluid spray device 1 from the high-pressure gas supply source and the liquid supply source. Next, the handle part 63 of the two-fluid spray device 1 is held with one hand, the barrel part 62 is held with the other hand, and the trigger 27 is turned from the closed position a to the open position b with one hand. As a result, the pipelines of the gas valve chamber 23c and the liquid valve chamber 23h are simultaneously opened, and the gas and the liquid are mixed in the two-fluid mixing unit 50, and instantaneously become a mist-like two-fluid and ejected from the nozzle tip 56. .

  The two-fluid spray device 1 according to the present embodiment has been described with respect to the case where compressed air is used as a gas and water is used as a liquid. However, the present invention is not limited thereto, and the water supply source is air in an air cylinder. It may be a case where the two-fluid spraying device 1 is connected through a gas hose and a liquid hose from a type that extrudes water. Also, when used for fire extinguishing, depending on the situation, use an incombustible gas such as carbon dioxide or nitrogen gas as the gas, or use an aqueous solution mixed with chemicals such as a strengthening liquid that increases the fire extinguishing effect as a liquid. It can also be used.

  The operational effects of the two-fluid spray device 1 according to the present embodiment configured as described above will be described below. Since the outer diameter of the air feeding joint 3 is close to the inner diameter of the gas outlet 23e and the inner diameter of the mixing part gas inlet 53d, the air joint 3 is connected to the gas outlet 23e and the mixing part gas inlet 53d. When the gap is reduced. In addition, since the O-ring 3b is fitted in the annular groove 3a on the outer peripheral surface of the air feed joint 3, sealing is performed in the gas outlet port 23e and the mixing portion gas inlet port 53d. Similarly, since the outer diameter of the liquid feed joint 4 approximates the inner diameter of the liquid outlet port 23j and the inner diameter of the mixing portion liquid inlet port 54a, the liquid feeding joint 4 has the liquid outlet port 23j and the mixing portion liquid inlet port 54a. There is little gap when connected to, and sealing in the liquid outlet 23j and the mixing portion liquid inlet 54a is achieved by the O-ring 4b in the annular groove 4a. And the connection mode between the unit 2 and the two-fluid mixing part 50 of the air / liquid feeding joints 3 and 4 is set to be insertable / removable. Thereby, it is possible to connect the unit 20 and the two-fluid mixing unit 50 while maintaining hermeticity with a very simple structure.

  Further, between the unit 20 and the two-fluid mixing unit 50, the air-feeding joint 3 is restricted from moving in the front-rear direction by the narrowed portion 23d and the first reduced diameter portion 53f. Similarly, the liquid feed joint 4 is also restricted from moving in the front-rear direction by the narrowed portion 23i and the reduced diameter portion 54b. Thereby, the air feeding joint 3 and the liquid feeding joint 4 can maintain the state where the movement in the front-rear direction between the unit 20 and the two-fluid mixing unit 50 is regulated in addition to the above-described hermeticity. it can.

  The inner surface portions 62e, 62f, 62h, 62i of the housing 60 hold the unit 20 and the two-fluid mixing unit 50 so that they are not separated in the front-rear direction, and the other inner surface portions 62c, 62d, 62g, 62j Is held so as not to approach in the front-rear direction. In addition, the housing 60 holds and fixes both the unit 20 and the two-fluid mixing unit 50 in the vertical and horizontal directions as a combination of halves from the left and right. Such gripping / fixing force cooperates with the connection state of the air feeding joint 3 and the liquid feeding joint 4 connected between the unit 20 and the two-fluid mixing unit 50. Both joints 3 and 4 are held stably.

  The trigger guard 64 has a frame that is wide enough to accommodate four fingers except the thumb of a human hand, and a portion extending from the rear lower part of the barrel 62 of the housing to the handle 63 and the trigger. Gaps 65 and 66 are provided in the guard lower frame 64b. Since the trigger 27 passes through the gap 65 and further extends to the gap 66, a wide dimension is secured also in the operation portion of the trigger. Thereby, the operability of the two-fluid spraying device 1 is improved, and for example, even if it is operated with a hand in a state of wearing a glove or the like, the spraying operation can be performed while reliably grasping the lever 27 with a finger.

  Further, the gaps 65 and 66 have a role that allows the trigger 27 to reciprocate in the horizontal direction during operation, but does not allow movement in the left-right direction perpendicular to the horizontal direction. In the actual operation state of the two-fluid spray device 1, the trigger 27 may be operated violently, and there is a high possibility that not only a normal horizontal reciprocation but also a lateral force is applied. In such a case, extending the tip of the trigger 27 to the gap 66 in the trigger guard lower frame 64b reduces the lateral blur of the trigger 27, and the unit 20 and the two-fluid mixing unit 50 are housed during operation. The force that causes rocking inside 60 is reduced. Furthermore, since the blur in the left-right direction of the trigger 27 is reduced, the strength of the portion where the trigger 27 is rotatably connected to the metal plate 29 and the pipe portion rearward protruding portion 23k is also compensated.

  As described above, the two-fluid spray device according to the present embodiment can provide a structure for gripping and fixing elements inside the device with a simple structure. The two-fluid spray device 1 of the present invention is not limited to the above-described illustrated examples, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Two-fluid spraying apparatus, 20 ... Unit, 21 ... Gas introduction pipe, 21a ... Male pipe joint, 22 ... Liquid introduction pipe, 22a ... Male pipe joint, 23 ... Piping part, 23a ... Gas introduction port, 23b ... Gas communication path, 23c ... gas valve chamber, 23d ... constriction part, 23e ... gas outlet, 23f ... liquid inlet, 23g ... liquid communication path, 23h ... liquid valve chamber, 23i ... constriction part, 23j ... liquid outlet, 23k: Piping part rear projecting part, 24: Two-fluid simultaneous open / close valve, 25 ... Gas valve chamber open / close valve, 25a ... Base part, 25b ... Valve shaft, 25c ... Valve body part, 25d ... Energizing means, 25e ... Packing, 26 Liquid valve chamber opening / closing valve, 26a ... Base, 26b ... Valve shaft, 26c ... Valve body, 26d ... Energizing means, 26e ... Packing, 27 ... Trigger, 28 ... Washer, 29 ... Metal plate, 3 ... Pneumatic joint 3a ... annular groove, 3b ... O-ring, 4 Liquid feed joint, 4a ... annular groove, 4b ... O-ring, 50 ... two-fluid mixing part, 51 ... mixing part main body, 51a ... tapered part, 52 ... two-fluid ejection part, 53 ... air socket, 53a ... base, 53b ... Tapered cylinder part, 53c ... Air socket cover part, 53d ... Mixing part gas inlet, 53e ... Mixing part gas communication path, 53f ... First reduced diameter part, 53g ... Second reduced diameter part, 54 ... Water socket, 54a ... mixing part liquid inlet, 54b ... reduced diameter part, 54c ... mixing part liquid communication path, 55 ... space, 56 ... nozzle tip, 60 ... housing, 61 ... screw, 62 ... barrel part, 62a ... gap, 62b ... gap 63 ... Handle part, 64 ... Trigger guard part, 64a ... Trigger guard front frame, 64b ... Trigger guard lower frame, 65 ... Gap, 66 ... Gap,

Claims (4)

A unit including a gas introduction pipe, a liquid introduction pipe, a pipe part having a gas lead-out port and a liquid lead-out port, and a two-fluid simultaneous on-off valve assembled and opened from the rear part of the pipe part by a trigger; A two-fluid spray device comprising a pneumatic joint and a liquid joint, a two-fluid mixing unit having a gas inlet and a liquid inlet, and a housing,
The air feeding joint and the liquid feeding joint are connected between the unit and the two-fluid mixing unit in a posture having mutually parallel axes, and both have connection directions to the unit and the two-fluid mixing unit. The same direction as the axis,
The gas feed joint connected the state in which the are inserted detachably in the connection direction both ends thereof against the gas inlet and the gas outlet port,
The liquid feed joint is connected the state in which the are inserted detachably in the connection direction both ends thereof against the said liquid inlet and said liquid outlet,
Said housing the unit, the gas feed joint, the liquid feed joint, and has a structure to fit the shape of the two-fluid mixing portion are combined inside, before and after the connecting direction with respect to the unit abutting portion from both sides, the two front and rear sides of the connection direction with respect to the fluid mixing portion and a contacting portion separately, the internal by grasping each said said unit two-fluid mixing portion to the connecting direction A two-fluid spraying device.   The air-feeding joint has an outer diameter that approximates to an inner diameter of the gas outlet and the gas inlet, and has at least one outer peripheral surface connected to the gas outlet and the gas inlet. An annular groove is provided around each axis, and an O-ring is fitted in each of the annular grooves, and the liquid feed joint has an outer diameter that approximates the inner diameter of the liquid outlet and the liquid inlet, The surface is provided with at least one or more annular grooves around the axis in each range connected to the liquid outlet and the liquid inlet, and an O-ring is fitted in each annular groove. The two-fluid spraying device according to claim 1.   A narrowed portion in contact with the end of the air feeding joint is formed inside the gas outlet, and a first reduced diameter portion in contact with the other end of the air feeding joint is formed in the gas inlet. Further, a constricted portion that contacts the end of the liquid feed joint is formed inside the liquid outlet, and a reduced diameter portion that contacts the other end of the liquid feed joint is formed inside the liquid inlet. The two-fluid spraying device according to claim 1 or 2.   The housing includes a barrel part, a handle part, and a trigger guard part. The trigger guard part includes a trigger guard front frame and a trigger guard lower frame, and the trigger guard front frame extends from the barrel part. The trigger guard lower frame extends downward from the lower end portion of the handle portion and intersects with the trigger guard front frame. The portion extending from the rear lower portion of the barrel portion to the handle portion and the trigger The two-fluid spraying device according to claim 1, wherein a gap is provided in the guard lower frame, and a tip end portion of the trigger extends to the gap of the trigger guard lower frame.

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