JP3987842B2 - Ultra-fine flexible nozzle for air gun - Google Patents

Description

  The present invention relates to an ultrafine flexible nozzle for an air gun, and more particularly to an ultrafine flexible nozzle for an air gun that is attached to an air gun that ejects compressed air in order to remove and clean dust adhering to an object to be cleaned.

  To clean the dust attached to the object to be cleaned, use an air gun that blows out compressed air, attach an air gun ultra-fine flexible nozzle to the air gun, and use the compressed air injected from the tip of the air gun ultra-fine flexible nozzle to clean the object to be cleaned. The dust adhering to is blown away and cleaned.

FIG. 9 is a front sectional view showing a configuration of a conventional ultrafine flexible nozzle for an air gun.
As shown in FIG. 9, a conventional air gun ultrafine flexible nozzle 101 has a pipe joint 103 that is an air gun connecting member made of a hollow body connected to the air gun 102, and the same center at the tip of a pipe mounting portion 133 of the pipe joint 103. A flexible nozzle jet pipe 104 for jetting compressed air arranged so as to extend along the axis C1 and a pipe stopper member arranged on the outer side near the base end of the nozzle pipe 104. A loose-fitting cylindrical spacer 106, and a cap nut 107, which is a fastening member that is fitted into the nozzle pipe 104 and is screwed to the pipe mounting portion 133 of the pipe joint 103 to hold the spacer 106. I have.

  The conventional ultrafine flexible nozzle 101 for an air gun has a compressed air injection port 142 that opens to inject compressed air at the tip of the nozzle pipe 104, and a threaded portion on the outer periphery of the pipe mounting portion 133 of the pipe joint 103. 135 is formed, and a small-diameter portion 133 a that fits an O-ring 108 for preventing leakage of compressed air is formed on the outer periphery of the pipe attachment portion 133 of the pipe joint 103, and the pipe attachment portion 133 of the pipe joint 103 is formed. A nozzle hole 138 is provided in the end wall 137 of the pipe fitting 103 for concentrating the compressed air ejected from the air gun 102 so as to face the central axis C1 and for primary compression. The nozzle pipe 104 opens at the end face of the pipe attachment portion 133 of the pipe joint 103. A circular groove 139 for fitting the base end portion is formed, and the nozzle pipe 104 is fitted to the spacer main body 160 of the spacer 106. A through-hole 161 is provided, and a large-diameter portion 162 that fits an O-ring 109 for preventing leakage of compressed air is formed on the inner periphery of the spacer 106 on the other end side where the through-hole 161 of the spacer body 160 opens, A tapered portion 163 that gradually increases in diameter from one end side toward the other end side is formed between the through hole 161 of the spacer main body 160 of the spacer 106 and the inner end of the large diameter portion 162, and is formed on the inner periphery of the cap nut 107. A female thread portion 171 is formed to be screwed into the male thread portion 135 of the pipe attachment portion 133 of the pipe joint 103, and the nozzle pipe 104 is inserted into the end wall 172 of the cap nut 107 facing the central axis C1 of the pipe joint 103. A pipe insertion hole 173 is provided.

  In assembling the conventional air gun ultra-fine flexible nozzle 101, first, the O-ring 108 is fitted into the small-diameter portion 133a formed on the outer periphery of the pipe attachment portion 133 of the pipe joint 103, and then the spacer 106 penetrates the spacer body 160. After the O-ring 109 is fitted into the large diameter portion 162 formed on the inner circumference on the other end side where the hole 161 opens, the nozzle pipe 104 is inserted into the through-hole 161 of the spacer main body 160 of the spacer 106, and the nozzle pipe 104 The spacer 106 is fitted on the outer side near the base end.

  Next, the nozzle pipe 104 is inserted from the one end side opened to the pipe insertion hole 173 of the end wall 172 of the cap nut 107 toward the other end side closed, and the spacer 106 fitted to the outside near the base end of the nozzle pipe 104 is inserted. The other open end is brought into contact with the inner surface of the end wall 172 of the cap nut 107.

  Next, after the base end portion of the nozzle pipe 104 is fitted into a circular concave groove 139 formed on the end surface of the pipe attachment portion 133 of the pipe joint 103, the female thread portion 171 of the cap nut 107 is inserted into the pipe attachment portion 133 of the pipe joint 103. The end wall 172 of the cap nut 107 presses and elastically deforms the O-ring 109 by screwing and tightening to the male thread portion 135, and the O-ring 109 presses against the outer peripheral surface of the nozzle pipe 104, and the nozzle pipe 104 9 is held by a loose-fitting spacer 106 and an O-ring 109, and the nozzle pipe 104 is fixed to the tip of the pipe joint 103 via the spacer 106, the cap nut 107, and the O-ring 109. As shown in FIG. The ultra-fine flexible nozzle 101 for use is assembled.

  However, in the conventional air gun ultrafine flexible nozzle 101 shown in FIG. 9, the nozzle pipe 104 is only held by a loose interference fit spacer 106 and an O-ring 109 pressed against the outer peripheral surface. When the O-ring 109 deteriorates due to aging, the pressure contact of the O-ring 109 with the outer peripheral surface of the nozzle pipe 104 becomes weak, and the nozzle pipe 104 may come off from the pipe insertion hole 173 of the end wall 172 of the cap nut 107. Compressed air is present between the end face of the pipe mounting portion 133 of the pipe joint 103 and one end of the spacer main body 160 of the spacer 106, and between the end wall 172 of the cap nut 107 and the other end of the spacer main body 160 of the spacer 106. , Between the outer peripheral surface of the nozzle pipe 104 and the through hole 161 of the spacer body 160 of the spacer 106. May be leaked to the outside, and a small-diameter portion 133a for fitting the O-ring 108 into the pipe joint 103 and a circular groove 139 for fitting the proximal end portion of the nozzle pipe 104 may be formed, or the spacer 106 may be formed. Since it is necessary to form the large-diameter portion 162 and the tapered portion 163 for fitting the O-ring 109, the shapes of the pipe joint 103 and the spacer 106 are complicated, and the manufacture of the pipe joint 103 and the spacer 106 is not easy. The manufacturing cost of the pipe joint 103 and the spacer 106 is high, the number of parts is large, and the work of attaching the nozzle pipe 104 to the pipe joint 103 is troublesome because it is troublesome.

  Therefore, an object of the present invention is made in view of the above circumstances, and the pipe fixing member is interposed via the elastic ring member only by tightening and screwing the fastening member to the pipe mounting portion of the air gun connection member. Since the flare part of the nozzle pipe is pressed toward the tip of the pipe attachment part of the air gun connection member, the flare part of the nozzle pipe can be brought into close contact with the end surface of the pipe attachment part of the air gun connection member, and the pipe stopper is attached to the nozzle pipe. It securely prevents the end wall of the tightening member from coming off from the pipe insertion hole, and even if the elastic ring member deteriorates due to aging, it is from between the end surface of the pipe mounting part of the air gun connection member and the flare part of the nozzle pipe. The air gun connecting member and the pipe fixing member do not have complicated shapes as in the conventional case, and the compressed air leakage can be prevented. Can be easily manufactured, the manufacturing cost of the air gun connection member and the pipe stop member can be reduced, the number of parts is reduced compared to the conventional, and the mounting work of the nozzle pipe to the air gun connection member is also possible It is an object of the present invention to provide an ultrafine flexible nozzle for an air gun that can be easily performed without requiring a labor.

Air gun for ultrafine flexible nozzle of the present invention, there is provided a air gun for ultrafine flexible nozzle detachably attached to an air gun for ejecting a compressed air, Ri Do hollow body connected to the air gun, stepped end surface, the pipe attachment and pipe fittings is airgun connecting member having a part end surface and the pipe mounting portion outer peripheral male threaded portion, is disposed so as to extend along the distal end of the pipe attachment portion of the tube joint on the same center axis, said fitting A flexible long nozzle pipe for jetting compressed air formed by widening an opening on the base end side so as to contact the end face of the pipe mounting portion to form a flare portion , and a base end of the nozzle pipe An elastic ring member that is fitted to the outside of the nozzle portion, and an elastic ring member that is loosely fitted to the outer side near the base end of the nozzle pipe and is adjacent to the elastic ring member. And the spacer is a pipe stop member for stopping against the base end portion to the pipe attachment portion end surface of the fitting, is arranged fitted to the nozzle pipe in order to suppress the spacer pipe mounting portion of the fitting is screwed on the outer peripheral male threaded portion and a box nut is fastening member having a Rumeneji part, by tightening screwed an internal thread portion of the cap nut to the pipe attachment portion outer peripheral male threaded portion of the fitting Thus, the cap nut causes the flare portion of the nozzle pipe to abut on the end surface of the pipe fitting portion of the pipe joint via the spacer and the elastic ring member, and the end portion of the cap nut on the side of the female thread portion is further connected to the pipe. by tightening until it abuts against the stepped end face of the joint, with a proper elastic deformation of the elastic ring member, a flared portion of the nozzle pipe of the pipe joint pi Also the in which you characterized in that the so that is pressed in close contact with the mounting portion end surface.

According to the present invention described above, the elastic ring member is fitted to the outside of the base end portion of the nozzle pipe so as to contact the flare portion, and the spacer serving as the pipe fixing member is disposed outside the base end of the nozzle pipe. The nozzle pipe is inserted so as to be adjacent to the elastic ring member, and is inserted from the one end side that opens to the pipe insertion hole of the end wall of the cap nut that is the tightening member toward the other end side, and then the cap nut is inserted. by tightening screwed the female screw portion to the pipe mounting portion outer peripheral male threaded portion of the pipe joint is airgun connecting member, pipe installation pipe fitting flare portion of the nozzle pipe cap nut via a spacer and the elastic ring member is brought into contact with part end face, by tightening up further the female screw portion side end face of the cap nut comes into contact with the stepped end face of the pipe joint, with a proper elastic deformation of the elastic ring member, Zurupaipu flared portion can be pressed in close contact with the pipe attachment portion end surface of the pipe joint, the elastic ring member between the flared portion and the spacer of the nozzle pipe is interposed, flared portion of the nozzle pipe and the spacer Are not in contact with each other, and damage to the flare and spacer of the nozzle pipe can be prevented, and the cap nut can be prevented from loosening with respect to the pipe fitting portion of the pipe joint , and from the pipe insertion hole in the end wall of the cap nut of the nozzle pipe. Detachment can be reliably prevented by the spacer , and the nozzle pipe can be fixed to the pipe attachment end face of the pipe joint by the elastic ring member, spacer , and cap nut. Even if the elastic ring member deteriorates due to secular change Further, it is possible to prevent the leakage of compressed air from between the pipe attachment portion end face of the pipe joint and the flare portion of the nozzle pipe.

  In the ultrafine flexible nozzle for air gun of the present invention, the nozzle pipe is made of a thermoplastic resin such as polypropylene.

  According to the present invention described above, since the material of the nozzle pipe is a thermoplastic resin such as polypropylene, the nozzle pipe is excellent in impact resistance, the manufacturing cost of the nozzle pipe is low, and the nozzle pipe is recycled as a resource. You can also

  In the ultrafine flexible nozzle for an air gun of the present invention, the elastic ring member is an O-ring.

  According to the present invention described above, since the elastic ring member is an O-ring, a commercially available inexpensive O-ring can be used as the elastic ring member, and the cost of the elastic ring member can be reduced.

As described above, according to the present invention, the female screw portion of the cap nut that is the tightening member is screwed to the outer peripheral male screw portion of the pipe joint of the pipe joint that is the air gun connection member , and the female screw portion of the cap nut By tightening the cap nut until the side end surface comes into contact with the end surface of the stepped portion of the pipe joint , the spacer that is the pipe fixing member moves the flare portion of the nozzle pipe to the end surface of the pipe mounting portion of the air gun connection member via the elastic ring member. Since the elastic ring member is pressed toward the end , the flare part of the nozzle pipe can be pressed and brought into close contact with the pipe mounting part end surface of the air gun connecting member with appropriate elastic deformation of the elastic ring member. The pipe mounting part of the air gun connection member prevents the wall from coming off from the pipe insertion hole, and even if the elastic ring member deteriorates over time. The leakage of compressed air from between the end face and the flare portion of the nozzle pipe can be prevented, and the shapes of the air gun connecting member and the pipe fixing member are not complicated as in the prior art. The manufacturing cost of the air gun connecting member and the pipe fixing member can be reduced, the number of parts is reduced compared to the conventional one, and the mounting work of the nozzle pipe to the air gun connecting member can be performed easily and without any trouble. It is possible to obtain an ultrafine flexible nozzle for an air gun.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  The ultra-fine flexible nozzle 1 for an air gun of the present invention is an ultra-fine flexible nozzle for an air gun that is detachably attached to an air gun 2 that ejects compressed air obtained by compressing air.

  The ultrafine flexible nozzle 1 for an air gun of the present invention has a pipe joint 3 which is an air gun connecting member made of a hollow body connected to an air gun 2 and a tip of a pipe mounting portion 33 of the pipe joint 3 along the same central axis C. A flexible long nozzle pipe 4 for compressed air injection arranged so as to extend, and an O-ring which is an elastic ring member arranged so as to be fitted outside the base end portion of the nozzle pipe 4 5 and is arranged so as to be adjacent to the O-ring 5 so as to be loosely fitted to the outside of the nozzle pipe 4 near the base end, and the base end portion of the nozzle pipe 4 is pressed against the end face of the pipe mounting portion 33 of the pipe joint 3 to be stopped. A cylindrical spacer 6 serving as a pipe fixing member, and a cap nut 7 serving as a fastening member that is fitted into the nozzle pipe 4 and pressed into the pipe mounting portion 33 of the pipe joint 3 so as to hold the spacer 6 in place. And In addition, a compressed air injection port 42 for opening the compressed air is formed at the tip of the nozzle pipe 4, and the end of the pipe joint 3 of the pipe joint 3 having the opening widened at the base end of the nozzle pipe 4 is contacted. A flare portion 43 in contact is formed, a thread portion 35 is formed on the outer periphery of the pipe mounting portion 33 of the pipe joint 3, and the compressed air ejected from the air gun 2 faces the end wall 37 of the pipe joint 3 on the central axis C. A nozzle hole 38 for squeezing and primary compression is provided, and a female thread portion 71 is formed on the inner periphery of the cap nut 7 to be screwed into the male thread portion 35 of the pipe fitting portion 33 of the pipe joint 3. 72 is provided with a pipe insertion hole 73 through which the nozzle pipe 4 is inserted facing the central axis C of the pipe joint 3, and the female thread part 71 of the cap nut 7 is connected to the threaded part 35 of the pipe attachment part 33 of the pipe joint 3. By screwing in and tightening. The support 6 presses the flare portion 43 of the nozzle pipe 4 toward the tip of the pipe mounting portion 33 of the pipe joint 3 through the O-ring 5, and the flare portion 43 of the nozzle pipe 4 is pressed to the end face of the pipe mounting portion 33 of the pipe joint 3. It is closely attached to.

  In the ultrafine flexible nozzle 1 for an air gun of the present invention, the material of the nozzle pipe 4 is a thermoplastic resin such as polypropylene.

  In the ultrafine flexible nozzle 1 for an air gun of the present invention, the elastic ring member is an O-ring.

FIG. 1 is a front sectional view showing a configuration of an ultrafine flexible nozzle for an air gun according to an embodiment of the present invention. FIG. 2 is a front sectional view showing an air gun connecting member of the ultrafine flexible nozzle for an air gun according to an embodiment of the present invention. FIG. 3 is a front sectional view showing a nozzle pipe of an ultrafine flexible nozzle for an air gun according to an embodiment of the present invention, and FIG. 4 is a front sectional view showing a pipe stopper member of the ultrafine flexible nozzle for an air gun according to an embodiment of the present invention. FIG. 5 is a front sectional view showing a fastening member of an ultrafine flexible nozzle for an air gun according to an embodiment of the present invention, and FIG. 6 is a front view showing a state during the assembly of the ultrafine flexible nozzle for an air gun according to an embodiment of the present invention. FIG. 7 is a cross-sectional view, FIG. 7 is a front sectional view showing a state before the assembly of the ultrafine flexible nozzle for an air gun according to the embodiment of the present invention, and FIG. 8 relates to the embodiment of the present invention. It is a front sectional view showing a mounting state to Agan for ultrafine flexible nozzle air gun.
As shown in FIG. 1, an air gun ultra-fine flexible nozzle 1 includes a long nozzle pipe 4 having flexibility for jetting compressed air and a pipe joint for connecting the nozzle pipe 4 to the air gun 2 shown in FIG. 3, an O-ring 5 fitted outside the proximal end of the nozzle pipe 4, a spacer 6 loosely fitted adjacent to the O-ring 5 outside the proximal end of the nozzle pipe 4, and a spacer 6 It consists of a cap nut 7 for pressing.

  As shown in FIG. 1, the pipe joint 3 has a joint body 30 formed of a hollow body, and inside the joint body 30, as shown in FIG. 2, the compressed air ejected by the air gun 2 is circulated. A compressed air passage 31 is formed.

  A large-diameter cylindrical air gun connection portion 32 for connection to the air gun 2 is formed along the central axis C on the proximal end side of the joint main body 30 of the pipe joint 3. A small-diameter cylindrical pipe attachment portion 33 is formed along C, and a male thread portion 34 is formed on the outer periphery of the air gun connection portion 32 of the joint body 30 so as to be screwed into the screw hole 20 provided in the air gun 2. A male thread portion 35 is formed on the outer periphery of the pipe attachment portion 33 of the main body 30.

  A fastening hexagonal portion 36 bulging outward is formed on the outer periphery between the air gun connection portion 32 of the joint body 30 of the pipe joint 3 and the pipe attachment portion 33, and the pipe attachment portion 33 of the joint body 30 is formed. In the center of the end wall 37, there is provided a penetrating nozzle hole 38 for constricting the compressed air ejected from the air gun 2 so as to face the central axis C and to perform primary compression.

  As shown in FIG. 2, a large-diameter stepped portion 39 is formed between the pipe attachment portion 33 and the hexagonal portion 36 of the joint body 30 of the pipe joint 3. A relief groove 310 is formed at the base of the portion 35 to complete the screw.

  It is also possible to form a relief portion on the side of the cap nut 7 without forming the relief groove 310 at the root of the male thread portion 35 of the pipe attachment portion 33 of the joint body 30 of the pipe joint 3.

  As shown in FIG. 1, the nozzle pipe 4 has a cylindrical nozzle pipe main body 40, and inside the nozzle pipe main body 40, as shown in FIG. A compressed air passage 41 is formed, and at the tip of the nozzle pipe main body 40, a circular compressed air injection port 42 that opens toward one side for injecting compressed air that has been primarily compressed is formed. A flared portion 43 having an enlarged opening is formed at the base end of 40.

  The nozzle pipe 4 has an overall length L of 140 mm, an outer diameter D of 2 mm, and an inner diameter d of 0.8 mm.

  The nozzle pipe 4 is formed with a flared portion 43 by thermoforming the base end of the nozzle pipe body 40.

  As shown in FIG. 1, the spacer 6 has a cylindrical spacer main body 60, and the spacer main body 60 of the spacer 6 penetrates the nozzle pipe main body 40 of the nozzle pipe 4 as shown in FIG. 4. A hole 61 is provided.

  As shown in FIG. 1, the cap nut 7 has a hexagonal nut main body 70 made of a hollow body. On the inner periphery of one end side of the nut main body 70, the pipe joint 3 is connected as shown in FIG. 5. A female thread portion 71 is formed to be screwed into the male thread portion 35 of the pipe mounting portion 33, and the end wall 72 that closes the other end portion of the nut body 70 faces the central axis C so as to pass through the nozzle pipe 4. The pipe insertion hole 73 is provided so as to penetrate therethrough.

If the stop position is not defined by other parts, the cap nut 7 is screwed in until the soft material parts such as the nozzle pipe 4 and the O-ring 5 are crushed.
In order to avoid this, a stepped portion 39 is formed between the pipe mounting portion 33 and the hexagonal portion 36 of the joint body 30 of the pipe joint 3, and the relief groove 310 is formed at the root of the threaded portion 35 of the joint body 30 of the pipe joint 3. To form the structure in which the cap nut 7 stops at the position where the end surface of the nut main body 70 of the cap nut 7 faces the end surface of the stepped portion 39 of the joint main body 30 of the pipe joint 3.

  When the cap nut 7 stops at a position where the end surface of the nut main body 70 of the cap nut 7 on the side of the female thread 71 and the end surface of the stepped portion 39 of the joint main body 30 of the pipe joint 3 come into contact with each other, the nozzle pipe 4 and the O-ring 5 Since an appropriate amount of deformation can be set for the pipe joint 3, the space between the outer end surface of the end wall 37 of the pipe attachment portion 33 of the joint body 30 of the pipe joint 3 and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4. It is possible to prevent leakage of compressed air from the air for a long time.

Next, a method for assembling the ultra-fine flexible nozzle for an air gun according to an embodiment of the present invention will be described.
The ultra-fine flexible nozzle 1 for the air gun is assembled by first fitting the tip of the nozzle pipe body 40 of the nozzle pipe 4 into the O-ring 5 and then moving the O-ring 5 along the longitudinal direction of the nozzle pipe body 40 of the nozzle pipe 4. Then, the O-ring 5 is fitted to the outside of the base end portion of the nozzle pipe body 40 of the nozzle pipe 4 by moving from the tip end to the base end to a position where the flare portion 43 abuts.

  Next, after the front end portion of the nozzle pipe body 40 of the nozzle pipe 4 is fitted from the one end 60 a side where the through hole 61 of the spacer body 60 of the spacer 6 is opened, the spacer 6 is inserted in the longitudinal direction of the nozzle pipe body 40 of the nozzle pipe 4. Is moved from the distal end toward the proximal end to a position where it abuts on the O-ring 5, and as shown in FIG. 6, the spacer 6 is placed on the O-ring 5 on the outer side of the nozzle pipe 4 near the proximal end of the nozzle pipe body 40. Fit adjacent.

  Next, the tip end portion of the nozzle pipe body 40 of the nozzle pipe 4 is inserted from the one end side opened to the pipe insertion hole 73 of the end wall 72 of the nut body 70 of the cap nut 7 toward the other end side, and the cap nut 7 The tip end portion of the nozzle pipe body 40 of the nozzle pipe 4 protruding from the pipe insertion hole 73 of the end wall 72 of the nut body 70 of the nut body 70 is moved outward while grasping with a finger and pulling, as shown in FIG. The other end 60 b of the through hole 61 of the spacer body 60 of the spacer 6 fitted to the outside of the nozzle 4 near the base end of the nozzle pipe body 40 of the pipe 4 contacts the inner surface of the end wall 72 of the nut body 70 of the cap nut 7. Let

  Thereafter, the female thread portion 71 of the nut main body 70 of the cap nut 7 is screwed into the female thread portion 35 of the pipe mounting portion 33 of the joint main body 30 of the pipe joint 3, and the female thread portion 71 side of the nut main body 70 of the cap nut 7. The nut body 70 of the cap nut 7 is rotated in the tightening direction with respect to the pipe mounting portion 33 of the joint body 30 of the pipe joint 3 until the end face and the end face of the stepped portion 39 of the joint body 30 of the pipe joint 3 abut. Thus, the end wall 72 of the nut body 70 of the cap nut 7 presses the spacer 6 toward the O-ring 5, and the spacer 6 is formed at the proximal end of the nozzle pipe body 40 of the nozzle pipe 4 via the O-ring 5. The flare portion 43 is pressed toward the tip of the pipe attachment portion 33 of the joint body 30 of the pipe joint 3, and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4 is attached to the pipe of the joint body 30 of the pipe joint 3. The nozzle pipe 4 is in close contact with the outer end face of the end wall 37 of 33, and is fixed to the tip of the pipe joint 3 by means of an O-ring 5, a spacer 6 and a cap nut 7. As shown in FIG. Are assembled.

Next, the usage method of the ultra-fine flexible nozzle for air guns concerning the example of the present invention is explained.
When the dust attached to the object to be cleaned is removed and cleaned by the air gun ultrafine flexible nozzle 1, first, the screw part 34 of the air gun connection portion 32 of the pipe joint 3 of the air gun ultrafine flexible nozzle 1 is attached to the air gun 2. After screwing into the screw hole 20, the hexagonal portion 36 of the joint body 30 of the pipe joint 3 is turned into the air gun 2 by rotating the pipe joint 3 in the tightening direction using the hexagonal portion 36 formed on the joint body 30. The air gun ultrafine flexible nozzle 1 is attached to the air gun 2 as shown in FIG.

  Next, when the cleaning operator pulls the operation lever (not shown) of the air gun 2 with a finger, the air gun 2 ejects compressed air, and the compressed air ejected by the air gun 2 is compressed inside the joint body 30 of the pipe joint 3. The air flows through the air passage 31 from the proximal end toward the distal end, and the nozzle hole 38 in the end wall 37 of the pipe mounting portion 33 of the pipe joint 3 squeezes the compressed air ejected from the air gun 2 into the compressed primary compressed air. The compressed air that has been primarily compressed is sprayed from the nozzle hole 38 of the end wall 37 of the pipe mounting portion 33 toward the inside of the nozzle pipe body 40 of the nozzle pipe 4.

  Thereafter, the compressed air jetted from the nozzle hole 38 of the end wall 37 of the pipe attachment portion 33 of the pipe joint 3 toward the inside of the nozzle pipe body 40 of the nozzle pipe 4 is compressed inside the nozzle pipe body 40 of the nozzle pipe. The air flows through the air passage 41 from the proximal end toward the distal end, and the first compressed air is injected from the compressed air injection port 42 formed at the distal end of the nozzle pipe body 40 of the nozzle pipe 4.

  The cleaning operator grasps the air gun 2 by hand and brings the tip of the nozzle pipe body 40 of the nozzle pipe 4 of the ultra-fine flexible nozzle 1 for the air gun closer to the cleaning location of the object to be cleaned. The compressed air compressed by primary compression, which is injected from the compressed air injection port 42 at the tip of the nozzle pipe body 40, is sprayed on the cleaning portion of the object to be cleaned, and dust adhering to the object to be cleaned is discharged to the tip of the nozzle pipe body 40 of the nozzle pipe 4. Removal cleaning is performed by blowing off with compressed air compressed by the primary compression injected from the compressed air injection port 42.

  In the ultrafine flexible nozzle 1 for an air gun of the present invention, the end wall 72 of the nut body 70 of the cap nut 7 is fixed to the spacer 6 by tightening and screwing the cap nut 7 to the pipe mounting portion 33 of the joint body 30 of the pipe joint 3. Is pressed toward the O-ring 5, the O-ring 5 is elastically deformed so as to be in intimate contact with the flared portion 43 of the nozzle pipe body 40 of the nozzle pipe 4, and the spacer 6 is inserted into the nozzle pipe 4 via the O-ring 5. Since the flare portion 43 of the nozzle pipe body 40 is pressed toward the tip of the pipe mounting portion 33 of the joint body 30 of the pipe joint 3, the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4 is pressed against the joint body 30 of the pipe joint 3. It can be brought into close contact with the outer end face of the end wall 37 of the pipe mounting portion 33, and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4 and the spacer. Since the O-ring 5 is interposed between the spacer 6 and the nozzle 6, the flare 43 of the nozzle pipe body 40 of the nozzle pipe 4 and the one end 60 a of the through hole 61 of the spacer body 60 of the spacer 6 do not contact each other. The flare portion 43 of the nozzle pipe body 40 and the spacer 6 of the nozzle pipe 4 can be prevented from being damaged, and the cap nut 7 screwed to the pipe mounting portion 33 of the joint body 30 of the pipe joint 3 is not loosened. The spacer 6 can reliably prevent the end wall 72 of the nut body 70 of the cap nut 7 of the nozzle pipe 4 from coming off from the pipe insertion hole 73.

  Further, since the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4 is in close contact with the outer end face of the end wall 37 of the pipe mounting portion 33 of the joint body 30 of the pipe joint 3, the pipe attachment of the joint body 30 of the pipe joint 3 is performed. The leakage of the compressed air from between the outer end face of the end wall 37 of the portion 33 and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4 can be prevented.

  If a sealant is applied between the end face of the pipe attachment portion 33 of the joint body 30 of the pipe joint 3 and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4, the pipe attachment of the joint body 30 of the pipe joint 3 is performed. It becomes possible to more reliably prevent the leakage of compressed air from between the end surface of the portion 33 and the flare portion 43 of the nozzle pipe body 40 of the nozzle pipe 4.

Sectional drawing which shows the structure of the ultra-fine flexible nozzle for air guns based on the Example of this invention. Sectional drawing which shows the air gun connection member of the ultra-fine flexible nozzle for air guns based on the Example of this invention. Sectional drawing which shows the nozzle pipe of the ultrafine flexible nozzle for air guns based on the Example of this invention. Sectional drawing which shows the pipe stop member of the ultra-fine flexible nozzle for air guns based on the Example of this invention. Sectional drawing which shows the clamping member of the ultra-fine flexible nozzle for air guns concerning the Example of this invention. Sectional drawing which shows the state in the middle of the assembly of the ultrafine flexible nozzle for air guns concerning the Example of this invention. Sectional drawing which shows the state before the assembly completion of the ultra-fine flexible nozzle for air guns concerning the Example of this invention. Sectional drawing which shows the attachment state to the air gun of the ultra-fine flexible nozzle for air guns concerning the Example of this invention. Sectional drawing which shows the structure of the conventional ultra-fine flexible nozzle for air guns.

Explanation of symbols

1 Ultra-fine flexible nozzle for air gun 2 Air gun 3 Pipe fitting (air gun connecting member)
4 Nozzle pipe 5 O-ring (elastic ring member)
6 Spacer (Pipe stop member)
7 Cap nut (clamping member)
20 Screw hole 30 Joint body 31 Compressed air passage 32 Air gun connection portion 33 Pipe mounting portion 34 Male thread portion 35 Male thread portion 36 Hexagonal portion 37 End wall 38 Nozzle hole 39 Stepped portion 40 Nozzle pipe main body 41 Compressed air passage 42 Compressed air injection Port 43 Flare portion 60 Spacer main body 60a One end 60b The other end 61 Through hole 70 Nut main body 71 Female thread portion 72 End wall 73 Pipe insertion hole 101 Air gun ultra-fine flexible nozzle 102 Air gun 103 Pipe joint 104 Nozzle pipe 106 Spacer 107 Cap nut 108 O Ring 109 O-ring 133 Pipe attachment portion 133a Small diameter portion 135 Male thread portion 137 End wall 138 Nozzle hole 139 Circular concave groove 142 Compressed air injection port 160 Spacer main body 161 Through hole 162 Large diameter portion 163 Taper portion 171 Female thread portion 172 End wall 173 Pie Insertion holes 310 relief groove C, C1 central axis

Claims (3)

A air gun for ultrafine flexible nozzle detachably attached to an air gun for ejecting a compressed air, Ri Do hollow body connected to the air gun, stepped end surface, the pipe mounting end surface and the pipe mounting portion outer peripheral male threaded portion and pipe fittings is airgun connecting member having, arranged so as to extend along the same central axis in the pipe attachment portion end face side of the tube joint, the order to contact the pipe attachment portion end surface of the fitting A flexible long nozzle pipe for jetting compressed air formed by expanding the opening on the base end side to form a flare portion , and being fitted to the outside of the base end portion of the nozzle pipe. a resilient ring member, the loosely fitted to the outside of the base end side of the nozzle pipe is disposed adjacent to the elastic ring member, a pipe mounting portion end surface of the fitting flare portion of the nozzle pipe Has a spacer is pipe stop member for stopping against, are arranged fitted to the nozzle pipe in order to suppress the spacer, the Rumeneji portion is screwed into the pipe mounting portion outer peripheral male threaded portion of the fitting and a cap nut is tightened member, by tightening the female threaded portion of the front Symbol cap nut screwed on the pipe attachment portion outer peripheral male threaded portion of the fitting, the said cap nut is a spacer and the elastic ring member The flange portion of the nozzle pipe is brought into contact with the pipe mounting portion end face of the pipe joint through the screw nut, and the cap nut is tightened until the female thread side end face comes into contact with the stepped portion end face of the pipe joint, with appropriate elastic deformation of the elastic ring member, octopus to so that is pressed against contact flare portion of the nozzle pipe to the pipe mounting portion end surface of the fitting Air gun for ultrafine flexible nozzle according to claim. The ultrafine flexible nozzle for an air gun according to claim 1, wherein the nozzle pipe is made of a thermoplastic resin such as polypropylene. The ultra-fine flexible nozzle for an air gun according to claim 1, wherein the elastic ring member is an O-ring.

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