JP5728198B2 - Suction device tip structure, suction adapter having the tip structure, and suction-type cleaning gun - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a tip structure of a suction device used in the manufacture and cleaning of mechanical devices, products, parts, and the like, and a suction adapter and a suction type cleaning gun including the tip structure, and more particularly, the shape and structure of a suction place / point. The present invention relates to a tip structure of a suction device capable of effectively sucking in accordance with a size and a depth, a suction adapter including the tip structure, and a suction type cleaning gun.

  Most parts that have been processed by various machine tools and completed have a complex shape and have uneven portions, mounting holes, and screw holes. Before the thread cutting process with a tap (tool), it is necessary to remove the cutting waste accumulated in the pilot holes processed in the previous process to prevent damage to the tool. The compressed air from the compressor placed in the factory is removed. A method of using and blowing off with an air gun is widely used. In addition, an air gun is used as a means for removing cutting waste remaining in a hole when cleaning a machine groove, sucking jig chips, or drilling a building or other structure. Such a cleaning method using an air gun has the advantage that dust and cutting debris can be removed even with complex and precise parts without causing unnecessary damage to the parts by spraying and removing the nozzle of the gun to the local area. It was.

  However, because cutting waste, cutting oil, etc. removed by jetting compressed air will bounce back to the surroundings due to the shape of the processed part (especially in the case of a set screw pilot hole etc.), it will also scatter in the direction of the operator. The screens and protective glasses were necessary. Moreover, the scattered cutting waste, cutting oil, etc. enter the previously cleaned cutting hole, and must be cleaned again, which makes the work inefficient.

  Therefore, in the past, as shown in the column “Prior Art and Problems” of Patent Document 1 (Japanese Utility Model Publication No. 7-31157), by ejector action by injecting compressed air to the rear end side. It has been proposed that a suction action is obtained on the tip side. However, such an air gun is inconvenient because only one of suction and injection can be performed by opening and closing the valve. Therefore, in Patent Document 1, a suction port is provided at one end and an exhaust port is provided at the other end. A suction passage having a distal end facing the exhaust port side and a proximal end side communicating with the compressed air introduction passage through the first valve, and being connected to the compressed air introduction passage. Proposes an air gun provided with a branch passage communicating with an injection passage having an injection port at the tip through a second valve.

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 8-275912), as a cleaner with a relatively light and small injection function that can be used as an ordinary cleaner (vacuum cleaner) or for the purpose of blowing off attached dust and cleaning. The air compressor can be driven by a motor for driving the cleaner through two clutches that can be arbitrarily switched between a coupling state and a disconnection state with a normal cleaner, and the intake air filter is driven by the air compressor. There has been proposed a cleaner with an injection function to which a cleaning function is added, in which clean air sucked through the air is compressed and sprayed from a nozzle, and dust attached to the device is blown away for cleaning. In this cleaner, both the suction fan of the cleaner and the air compressor can be moved simultaneously.

  Further, in Patent Document 3 (Japanese Patent Application Laid-Open No. 10-43699), as a cleaner that can remove dust adhering to a complicated three-dimensional object with unevenness locally in a dust removing cleaner, An air suction port that opens, an ultrasonic air ejection nozzle that is disposed so as to be positioned at the center of the air suction port as viewed from the front end side, an air feeding state to the ultrasonic air ejection nozzle, and a stop state; A pencil-type cleaner head having a switch mechanism that can be switched between and a flexible vacuum pipe that communicates with the air suction port and a flexible air supply pipe that communicates with the ultrasonic air ejection nozzle. In addition, there has been proposed a cleaner configured to always suck air from the air suction port of the cleaner head.

Japanese Utility Model Publication No. 7-31157 JP-A-8-275912 Japanese Patent Laid-Open No. 10-43699

  As described above, using compressed air as before, dust, cutting debris, cutting oil, etc. are removed using its ejector action (suction action generated by the surrounding fluid being drawn in the direction of fluid flow). A cleaner for suctioning is known, and a cleaner capable of simultaneously moving both a suction fan for the cleaner and an air compressor has been proposed.

  However, in the conventionally provided cleaner, not only the suction force is limited, but also the position for discharging pressurized air is fixed, depending on the shape, size, or depth of the groove or hole, The discharge position of the pressurized air could not be changed.

  Therefore, the present invention makes it possible to change the discharge position of the pressurized air, even if it is dust, cutting waste, cutting oil, etc. that have entered a groove or hole that cannot be removed by a conventional suction cleaner. It is a first object to provide a tip structure of a suction device that can be effectively sucked and removed, a suction adapter having the tip structure, and a suction type cleaning gun.

  It is also necessary to improve the operability on the assumption of the first problem. More specifically, since holes and grooves for sucking and removing dust, cutting waste, cutting oil, etc. are not necessarily formed at the same depth, even during the cleaning operation, Accordingly, it is desirable to adjust the protrusion of the pressurized air so as to obtain an optimum cleaning effect. Accordingly, the present invention provides a tip structure of a suction device that solves the first problem and further improves operability, a suction adapter including the tip structure, and a suction type cleaning gun. It is an issue.

  Further, the cleaner proposed in Patent Document 2 is capable of moving both the suction fan and the air compressor at the same time. As described in claim 2, the air injection nozzle Passes through the center of the conical suction part for cleaners with a wide bottom opening, and reaches the conical bottom opening, so the size of objects that can be sucked is limited to less than half the diameter of the conical suction opening It has become.

  Accordingly, a third object of the present invention is to provide a suction device tip structure capable of sucking even an object having a size approximately equal to the inner diameter of the suction portion, a suction adapter having the tip structure, and a suction type cleaning gun. And

  In order to solve at least one of the above-mentioned problems, the present invention has found that a nozzle for discharging fluid such as pressurized air is provided in a suction area of a suction type cleaner so as to be able to advance and retreat, thereby completing the present invention. It is a thing.

  That is, the tip structure of the suction device according to the present invention is a suction structure at the tip of the suction portion in a suction device such as a vacuum cleaner having a suction structure or a cleaner using pressurized air, and the suction device is configured in a cylindrical shape. A suction port that opens on the tip side of the portion, and an injection nozzle that is disposed in or near the suction port and that discharges fluid into the vertical projection plane of the suction port, and the tip portion of the injection nozzle is The suction part is provided so as to be able to protrude and retract from the suction port of the suction part.

  According to the tip structure of the suction device, the jet nozzle is inserted into the groove or hole according to the depth or size of the groove or hole to be cleaned, and the fluid discharged from the jet nozzle causes the groove or hole to enter the groove or hole. Dust, cutting waste, cutting oil, or the like that has entered can be discharged and sucked through the suction port of the suction portion. That is, according to the depth and size of the hole or groove, the ingress condition of the injection nozzle (into the groove or hole) can be adjusted, whereby dust, cutting waste or the like corresponding to the groove or hole to be cleaned can be adjusted. The flow of the fluid containing the optimal air for discharging cutting oil etc. can be produced, and the cleaning effect can be improved.

  In the tip structure of the suction device of the present invention described above, the spray nozzle only needs to be able to advance and retreat at least to the extent that it can protrude from the suction port of the suction portion, and is installed inside the suction portion formed in a cylindrical shape in the suction device. In addition, it can be arranged outside the suction part, and can also be arranged in the wall surface constituting the suction part.

  In the case where the injection nozzle is installed inside the suction part, the injection nozzle can be arranged at the center of the suction part, but preferably, the injection nozzle is decentered with respect to the axis of the suction part, More preferably, it is provided at a position along the inner wall surface of the suction portion so as to be movable forward and backward. This is because, by arranging the spray nozzle in an eccentric manner in the suction portion, it is possible to suck up to a nozzle having a size approximately equal to the horizontal sectional diameter of the suction portion. Therefore, for example, when the object to be sucked is a thing with high fluidity such as a powdery substance or a liquid, this injection nozzle may be arranged at the center of the suction portion.

  In the present invention, since the ejection nozzle is for ejecting fluid into the vertical projection plane of the suction port and is disposed so as to be movable forward and backward, means for supplying fluid to the ejection nozzle Is required. As a means for supplying such a fluid, it is desirable to use a tubular member in the present invention.

  That is, the spray nozzle is installed at the tip of a tubular member that guides fluid, and a guide hole that accommodates the tubular member in the wall surface so as to be slidable in the axial direction in the suction portion configured in the tubular shape. Desirably, the “suction structure at the tip of the suction portion” is formed.

  It is desirable that the tubular member in which the spray nozzle is installed has strength or formability that does not deform, shake, or swing due to the reaction when the fluid is discharged. For this purpose, for example, it can be formed as a metal tube or a resin tube having the same degree of hardness. In addition, although this tubular member may be formed of a resin-made tube having a part thereof, at least the region protruding from the suction port of the suction portion is made of metal or has sufficient hardness. It is desirable that the pipe is made of a resin pipe (that is, a hard pipe). However, depending on the shape of the groove or hole or the opening direction of the groove or hole, it may be desirable to arbitrarily deform the groove or hole. Therefore, when deforming along the shape of a groove or a hole in this way, it is possible to use a resin or the like to form an appropriately flexible tube. In addition, about the hardness of this pipe | tube, it can also change suitably according to the quantity and flow velocity of the pressurized air to discharge.

  In addition, since the ejection nozzle ejects fluid into the vertical projection plane of the suction port, the ejection nozzle includes at least an opening for ejecting fluid. The term “in the vertical projection plane of the suction port” refers to a region in which the opening surface of the suction port is projected onto the object to be cleaned, and the spray nozzle is disposed in at least any part of the region regardless of the direction of spraying. It is configured to supply pressurized air.

  The opening for discharging the fluid is provided on the tip side of the injection nozzle, and forms an opening for discharging in the axial direction of the injection nozzle, and also forms an opening for discharging in the radial direction of the injection nozzle. You can also. Furthermore, it is also possible to form an opening in a direction in which the fluid is ejected obliquely rearward in the radial direction of the ejection nozzle or obliquely forward in the radial direction of the ejection. The direction of the opening for discharging the fluid can be selected as appropriate depending on which part of the groove or hole is to be cleaned intensively, or the volume or mass of the object to be removed. For example, when removing dust or cutting debris accumulated on the bottom surface of a groove or hole, the opening can be made to discharge in the axial direction of the tube, while dust or cutting adhered to the side surface of the groove or hole. When removing debris or the like, the opening can be made to discharge in the radial direction of the tube.

  Furthermore, the injection nozzle provided with the opening for discharging the fluid may be prepared in a plurality of shapes and structures, and can be configured to be appropriately detachable from the tubular member. In this case, the injection nozzle can be constituted by a tubular member formed in a tubular shape and an injection nozzle formed detachably at the tip of the tubular member, and the opening for discharging the fluid has Can be formed on the injection nozzle.

  The injection nozzle and the tubular member are not necessarily limited to a combination of two members, but include, for example, an injection nozzle formed by processing the distal end side of the tubular member, and the distal end side of the injection nozzle is extended. In this case, the extended part is a tubular member. That is, these techniques are included in the technical scope of the present invention.

  In the present invention, the fluid that discharges fluid from the injection nozzle toward the vertical projection plane of the suction port (that is, the tip side of the suction port) is air supplied from a compressor or the like in many cases. For example, it may be an inert gas such as nitrogen or helium, or may be an active gas such as hydrogen, oxygen, or propane gas after being subjected to an explosion-proof measure. good. Further, the fluid does not necessarily need to be a gas, and may be a liquid such as water, various cleaning liquids, alcohol or other hydrocarbon oils, or a mist of these liquids.

  In addition, the suction device adopting the above suction structure is not necessarily limited to a vacuum cleaner having a suction structure or a cleaner using the ejector effect of pressurized air, but used to suck gas, liquid or solid. It can employ | adopt as a structure of the suction | inhalation part in the various machinery appliances to be implemented, regardless of whether the machinery appliance is for home use or industrial use.

  Next, according to the present invention, a suction adapter having the tip structure is provided as related to the tip structure of the suction device, and at least one of the above problems is solved by the suction adapter.

  That is, in the present invention, the suction port formed in the cylindrical shape is formed with a suction port on one end side in the axial direction and a discharge port on the other end side. The suction structure of the invention is provided, and the injection nozzle in the suction structure is formed with a pressurizing line connecting means connectable with a line for supplying pressurized air or other pressurized fluid. A suction adapter is also provided.

  Such a suction adapter can be used by being attached to an air gun or the like for supplying pressurized air. By introducing the pressurized air supplied from the air gun into the injection nozzle from the pressure line connecting means, the injection nozzle Can discharge pressurized air into the groove or hole. Dust, cutting waste, cutting oil, or the like discharged by the pressurized air is sucked at the suction portion of the suction port and can be discharged from the discharge port. Here, the suction force at the suction port is the ejector action (suction generated by the surrounding fluid being drawn in the flowing direction of the fluid) by discharging the pressurized air toward the discharge side opening in the suction cylinder. A suction force for sucking dust, cutting waste, cutting oil, or the like can be obtained using the action. In addition, a suction force can be obtained by suction from a discharge side opening with a vacuum cleaner or the like.

  In particular, when the suction adapter is a suction adapter used by connecting to an air gun or other pressurized air supply device capable of supplying pressurized air, the suction portion present in the suction port is as described above. The suction structure of the present invention is provided, and the suction nozzle in the suction structure can be a suction adapter that is supplied with pressurized air from a pressurized air supply device and discharges air from its tip.

  By using this suction adapter, it can be narrow or deep by using various air tools that discharge pressurized gas including air guns alone, or by using a combination of air tools and vacuum cleaners. Even in the grooves and holes, the cleaning can be performed efficiently.

  And in the present invention, as an invention related to the tip structure of the suction device, a conventional air gun is used, and the compressed air supplied from the air gun is discharged from the injection nozzle, so that a deep or narrow groove or Provided is a suction type cleaning gun capable of discharging dust, cutting waste, cutting oil or the like that has entered a hole, and solves at least one of the above problems.

  That is, the present invention comprises an air gun body having a fluid path through which pressurized air is introduced and discharged from the tip, and a suction cylinder connected to the tip side of the air gun body. The suction part present on the side has the suction structure according to the present invention, and the pressurized air introduced into the air gun body is supplied to at least the spray nozzle constituting the suction structure, and the air is discharged from the tip. A suction type cleaning gun characterized by the above is also provided.

  In such a suction type cleaning gun, the pressurized air supplied from the air gun body is guided to the injection nozzle, and the injection nozzle is formed so as to be able to enter the groove or hole to be cleaned. An air flow is generated by the ejection, and foreign matters such as dust, cutting waste, or cutting oil entering the groove or hole can be efficiently discharged. The discharged foreign matter is sucked and discharged by suction by the ejector effect of the pressurized air that is branched from the air gun and supplied into the suction cylinder, or by suction by a separately prepared vacuum cleaner or other suction device. .

In the above suction cleaning gun, the air gun body and the suction cylinder can be configured as follows, for example.
That is, an ejection nozzle that allows gas to be ejected in the direction toward the distal end side is arranged eccentrically on the distal end side of the suction cylinder that is integrated with an appropriate angular posture at the distal end of the grip, and the ejection nozzle is disposed from the proximal end of the grip. A compressed air circuit with an injection switch arranged to expose the operation input section on the outer wall that can be operated by a finger holding the grip at an appropriate place in the middle of the pipeline, and the injection switch and the injection of the compressed air circuit The end of the negative pressure induction circuit branched from an appropriate position between the nozzle and the nozzle is provided so as to open in the direction opposite to the injection nozzle (that is, the end of the suction cylinder) in the suction cylinder. It is possible to provide a flow path that changes the traveling direction with an R-shaped curved shape.

  In addition, at least two spray nozzles having a common attachment / detachment mechanism at the base end thereof are prepared, and the length of each nozzle is set to have a relationship between long and short. it can.

  In addition, when the injection nozzle is provided with a part of the attachment / detachment mechanism at the base end and is attached to the attachment / detachment mechanism on the tip side of the suction cylinder, the tip of the injection nozzle is fixed so as to protrude from the tip of the suction cylinder. May be. In addition, when the injection nozzle is provided with a part of the attachment / detachment mechanism at the base end and is attached to the attachment / detachment mechanism on the tip side of the suction cylinder, the tip of the injection nozzle is disposed backward from the tip of the suction cylinder. It may be fixed to do.

  In addition, a wide-mouth type suction nozzle having a wide suction port and a long overall length, and a long-type injection nozzle suitable for the nozzle may be mounted at the tip of the suction cylinder.

  According to the suction structure at the tip of the suction portion according to the present invention, since the injection nozzle that discharges fluid such as pressurized air toward the tip side of the suction port is provided so as to freely advance and retract, deep grooves and holes, Or the said injection nozzle can be made to approach also into the groove | channel and hole with narrow opening. By jetting or discharging pressurized air from the jet nozzle, an air flow can be generated in the groove or hole, and foreign matter such as dust, cutting waste or cutting oil in the groove or hole can be discharged. Since the foreign matter in the groove or hole is discharged, the foreign matter can be reliably sucked and removed even when the suction port cannot enter the groove or hole.

  Therefore, according to the present invention, it is possible to change the discharge position of the pressurized air, and even if it is dust, cutting waste, cutting oil, etc. Provided are a tip structure of a suction device that can be effectively sucked and removed, a suction adapter including the tip structure, and a suction type cleaning gun.

  In addition, by forming the injection nozzle in a tubular shape, the injection or discharge position of the pressurized air with respect to the groove or hole can be freely adjusted by the insertion / removal operation of the tube, and the operability is improved. . Therefore, in the present invention, even when the hole or groove for sucking and removing dust, cutting waste, cutting oil or the like is not formed at the same depth, the pressure is applied according to the suction condition even during the cleaning operation. It is possible to provide a tip structure of a suction device that adjusts the protrusion of air so as to obtain an optimal cleaning effect, a suction adapter including the tip structure, and a suction type cleaning gun.

  Furthermore, if the spray nozzle is provided at a position that is eccentric with respect to the axis of the suction part and can be moved forward and backward, the space for sucking in foreign matter such as dust, cutting waste or cutting oil may be maximized. Thus, it is possible to provide a tip structure of a suction device that can suck even an object having a size about the inner diameter of the suction portion, a suction adapter including the tip structure, and a suction type cleaning gun.

When the injection nozzle is formed in a tubular shape and a guide hole is formed in the wall surface of the suction portion configured in a cylindrical shape so as to be slidable in the axial direction, the injection is performed from the injection nozzle. The jet nozzle is not shaken or swayed by the reaction of the fluid or the suction force at the suction portion, and can be stably moved to the target place. Further, it is possible to provide a suction device tip structure that is easy to maintain, a suction adapter including the tip structure, and a suction-type cleaning gun without the possibility that the sucked foreign matter is caught by the injection nozzle and clogged.

The perspective view which shows the suction type washing gun which installed the adapter for suction concerning this embodiment Fig. 1 is a schematic vertical sectional view of an essential part of the suction type cleaning gun shown in Fig. 1. A-A 'sectional view in FIG. Sectional drawing which shows some embodiment of an injection nozzle Schematic showing the cleaning action of the suction device tip structure The perspective view which shows the suction type washing | cleaning gun which installed the adapter for suction concerning other related embodiment FIG. 6 is a schematic vertical sectional view of the main part of the suction type cleaning gun shown in FIG.

  Hereinafter, a specific embodiment of the tip structure 10 of the suction device according to the present invention, the suction adapter 20 including the tip structure 10 and the suction type cleaning gun 30 will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a suction type cleaning gun 30 in which a suction adapter 20 according to the present embodiment is installed, and the tip structure 10 according to the present embodiment is adopted in the suction portion of the suction adapter 20. Has been. 2 is a schematic vertical cross-sectional view of the main part of the suction type cleaning gun 30 shown in FIG. 1, FIG. 3 is a cross-sectional view taken along line AA ′ in FIG. 2, and FIG. FIG. 5 is a schematic view showing the cleaning action by the tip structure 10 of the suction device according to this embodiment. 6 is a perspective view showing a suction type cleaning gun 30 provided with a suction adapter 20 according to another related embodiment, and FIG. 7 is a longitudinal sectional view of a main part of the suction type cleaning gun 30 shown in FIG. FIG.

  First, referring to FIG. 1, a suction type cleaning gun 30 according to the present embodiment, an air gun body 31 into which pressurized air is introduced from an air compressor (not shown), and the tip of the air gun body 31 are connected. The suction adapter 20 is constructed. In addition to releasably connecting the two, they can also be integrated by welding or bonding.

  Next, the overall structure including the internal structure of the suction type cleaning gun 30 will be described with reference to FIGS. In the following, the suction adapter 20 according to the present embodiment is a portion except the air gun main body 31 in the suction type cleaning gun 30, and the suction structure 10 at the tip of the suction part is the same in the suction type cleaning gun 30. Since it is a structure of the front-end | tip part of the attraction | suction cylinder 21, and all are clear from description of the attraction | suction type washing | cleaning gun 30, it demonstrates according to below.

  Although the internal structure is omitted in FIG. 1, the suction type cleaning gun 30 is provided with a flow path 34 for guiding pressurized air supplied from an air compressor or the like, as shown in FIG. The flow path 34 can be opened and closed by operating a trigger 33 formed on the lower surface of the air gun body 31 in this embodiment. The pressurized air supplied from the flow path 34 is guided to a flexible tube 32 protruding from the upper surface of the air gun body 31, and the tube 32 is inserted above the suction adapter 20. The compressed air is supplied to the suction adapter 20 through the tube 32.

  The suction adapter 20 includes a suction cylinder 21 formed in a cylindrical shape having a curved elbow portion 21R, and has a lower end side as a suction port 23 and a distal end side as a discharge port 24. A suction device such as a vacuum cleaner can be connected to the discharge port 24 formed on the distal end side of the suction cylinder 21, and suction force is generated in the suction port 23 by suction of the suction device. Dust, dust, cutting waste, cutting oil, or the like existing around the mouth 23 can be sucked.

  The suction cylinder 21 includes a tubular member 25 extending along a circumferential surface from the elbow portion 21R toward the suction port 23, and an injection nozzle 22 provided at the distal end of the tubular member 25. The tube 32 is connected to the tubular member 25, and the pressurized air supplied to the air gun body 31 is ejected from the ejection nozzle 22 through the tube 32 and the tubular member 25 by the operation of the trigger 33. It will be.

  The pressurized air ejected from the ejection nozzle 22 ejects pressurized gas from the tip end side of the suction port 23 into the vertical projection plane of the suction port 23, and this blows out foreign matter that has entered a groove or a hole. The blown-out foreign matter is sucked from the suction port 23 by the suction by the suction device and discharged from the discharge port 24.

  In particular, in the present embodiment, the tubular member 25 is accommodated in the wall surface of the suction cylinder 21 so as to be slidable in the axial direction. The guide hole for accommodating the tubular member 25 is accommodated in the wall surface of the suction cylinder 21. 26 is formed. An injection nozzle 22 is installed at the distal end of the tubular member 25 that has passed through the guide hole 26. With such a configuration, the upper end side of the tubular member 25, that is, the connection side with the tube 32 is held up and down. By moving the nozzle, the jet nozzle 22 existing at the tip of the nozzle can be advanced and retracted to the extent that it protrudes from the suction port 23 of the suction portion on the lower end side of the suction cylinder 21.

  In the present embodiment, the injection nozzle 22 is formed with an outer diameter slightly larger than the inner diameter of the guide hole 26. By forming in this way, even if the tubular member 25 is pushed up by the injection of the pressurized gas, the injection nozzle 22 functions as a stopper, and the possibility that the tubular member 25 comes out is eliminated.

  Further, in the present embodiment, the guide hole 26 formed in the wall surface of the suction cylinder 21 has a shape in which a portion where the guide hole 26 is formed protrudes into the suction cylinder 21 as shown in FIG. As a result, the maximum amount of dew is generated when the foreign matter is sucked. Note that the tubular member 25 does not necessarily need to form the guide hole 26 in the suction cylinder 21 and pass through the guide hole 26. For example, the tubular member 25 may be disposed so as to pass through the internal space 27 of the suction cylinder 21. Even in this case, it is necessary to provide an operation unit for moving the tubular member 25 up and down. Further, even when the tubular member 25 is disposed in the suction cylinder 21 so as to be exposed, the tubular member 25 is arranged along the inner wall surface in the suction cylinder 21 so that a larger foreign object can be sucked (eccentric). Preferably).

  With respect to the injection nozzle 22, an embodiment of the injection nozzle 22 that can be attached to the tip of the tubular member 25 will be described with reference to FIG. The injection nozzle 22 shown in FIG. 4 is formed so that a tubular member 25 is fitted into a stepped portion formed in the upper part of the drawing so that the inner diameter is increased, and a plurality of openings 28 are provided on the tip side. The pressurized air is jetted from the opening 28. In particular, FIG. 4A includes an opening 28 that injects pressurized air toward the axial direction of the injection nozzle 22, and FIG. 4B illustrates an addition toward the axial direction and the radial direction of the injection nozzle 22. 4C includes an opening 28 for injecting pressurized air toward the axial direction and the radial end of the injection nozzle 22, and FIG. D) is provided with an opening 28 for injecting pressurized air toward the tip end side in the axial direction and radial direction of the injection nozzle 22. These nozzles can be used with appropriate modifications depending on the shape of the groove or hole to be cleaned or the location of the foreign matter to be removed.

  Next, the operation of the suction type cleaning gun 30 configured as described above will be described with reference to FIG. First, in the state as shown in FIG. 5A where the groove or hole to be cleaned is not so deep, a certain amount of foreign matter can be sucked in by suction from the discharge port 24 by a suction machine instrument. However, foreign matter that adheres in the groove or hole and cannot be sucked in by suction alone is discharged by the injection of pressurized air from the injection nozzle 22, and this is sucked from the suction port 23 so as to enter the groove or hole. It can be cleaned thoroughly.

  In such a cleaning operation, the suction port 23 sucks not only the inside of the groove or hole but also the air around the groove or hole, so that the foreign matter discharged from the groove or hole is discharged to the outside of the suction port 23. All are sucked into the suction cylinder 21 without being scattered. As a result, sufficient cleaning can be performed without secondary contamination of the surroundings.

  On the other hand, as shown in FIG. 5B, the groove or hole is deep, and there are cases where the foreign matter at the bottom cannot be lifted by the suction force by suction at the suction port. Therefore, in such a case, the tubular member 25 is operated to inject pressurized air while inserting the injection nozzle 22 into the groove or hole, and an air flow is generated in the groove or hole, so that the foreign matter is made to fly, It is possible to suck from the suction port 23. In particular, cutting waste and dust are not always present only at the bottom, and often accumulate in the groove or hole. In such a case, by sucking while gradually inserting the tubular member 25, it is possible to gradually suck and remove from the surface of the accumulated foreign matter.

  In the suction type cleaning gun 30 according to this embodiment, the injection nozzle 22 is provided in the groove or hole so as to be able to advance and retreat, so that the suction port 23 in the suction cylinder 21 and the mouth portion of the groove or hole to be cleaned are provided. The distance can be kept constant. As a result, the amount of air that is drawn from around the groove or hole and sucked can be kept constant, and stable suction can be performed. In this regard, if the suction nozzle is fixed, the distance between the suction port 23 and the opening portion of the groove or hole to be cleaned also changes, making stable suction difficult.

  Next, an example of a suction type cleaning gun 30 according to another embodiment and a suction adapter 20 that can be employed here will be described with reference to FIGS.

  First, the suction type cleaning gun 30 (and the suction adapter 20) shown in this embodiment is configured to generate a suction force by using an ejector effect by supplying a pressurized gas. The point that the structure is configured in the suction cylinder 21 is different from the suction type cleaning gun 30 (and the suction adapter 20) shown in FIGS.

  That is, the suction type cleaning gun 30 (and the suction adapter 20) according to this embodiment bulges toward the outer side in the radial direction on the tip side (suction port side) of the elbow part 21R in the suction cylinder 21. A portion 40 is formed, and a flow path 41 for guiding pressurized air as shown in FIG. 7 is formed in the bulging portion 40. The flow path 41 is provided so as to make a round in the bulging portion 40, and an ejector in a direction in which pressurized air is injected into the flow path 41 toward the end side (that is, the elbow portion side) of the suction cylinder 21. The side openings 42 are provided at one place or two or more places.

  In the suction type cleaning gun 30 formed in this way, when pressurized air is supplied to the flow path 41 in the bulging portion 40 by operating the trigger 33, this is injected into the suction cylinder 21 from the ejector side opening 42. Due to the ejector effect, a suction force by suction gas is generated in the suction port 23. Further, since pressurized air is supplied also to the injection nozzle 22, a suction type cleaning gun 30 (and a suction adapter 20) that realizes injection and suction by the pressurized air is provided.

  In this embodiment, the pressurized air supplied into the flow path 41 formed in the bulging portion 40 is branched from the pressurized air supplied to the injection nozzle 22. It is also possible to supply pressurized air supplied by a separate system from the nozzle 22. Further, even with the suction-type cleaning gun 30 (and the suction adapter 20) formed in this way, it is of course possible to suck it from the discharge port 24 with a separate suction device.

  In particular, in the suction type cleaning gun 30 (and the suction adapter 20) shown in this embodiment, the ejector side opening 42 for generating the ejector effect is formed in the wall surface of the suction cylinder 21, and the drive gas in the ejector The flow path 41 for supplying is provided outside the suction cylinder 21. By forming in this way, there is no protrusion for the ejector in the suction cylinder 21, so that even a larger foreign object can be sucked.

  The tip structure 10 of the suction device of the present invention, and the suction adapter 20 and the suction type cleaning gun 30 provided with the tip structure 10 are not limited to the above-described embodiments, but the gist of the present invention. Of course, various changes can be made without departing from the scope.

10 Tip structure (suction structure)
20 Suction adapter
21 Suction cylinder
21R elbow part
22 Injection nozzle
23 Suction port
24 outlet
25 Tubular member
26 Guide hole
27 Internal space
28 opening
30 Vacuum cleaning gun
31 Air gun body
32 tubes
33 Trigger
34 Flow path
40 bulge
41 flow path
42 Ejector side opening

Claims (5)

A suction structure at the tip of a suction part in a suction device such as a vacuum cleaner equipped with a suction structure or a cleaner using pressurized air,
A suction opening that opens to the distal end side of the suction portion configured in a cylindrical shape;
An injection nozzle that is disposed in or near the suction port and discharges fluid into a vertical projection plane of the suction port;
The tip part of the injection nozzle is provided so as to be able to advance and retract so that it can protrude from the suction port of the suction part ,
The spray nozzle is installed at the tip of a tubular member that guides fluid,
In an appropriate position in front of the rear end portion of the suction portion configured in the cylindrical shape, an elbow portion that changes the traveling direction with an R-shaped curved shape is provided,
The tubular member is formed of a metal tube or a resin tube having the same degree of hardness, and is accommodated in the guide hole so as to be slidable in the axial direction. The suction structure at the tip of the suction portion is characterized in that it protrudes outside the suction portion configured in the cylindrical shape .
The suction structure at the tip of the suction portion according to claim 1, wherein the spray nozzle is provided at a position eccentric with respect to an axis of the suction portion so as to freely advance and retract.
The spray nozzle is installed at the tip of a tubular member for guiding fluid;
The suction structure at the tip of the suction part according to claim 1 or 2, wherein a guide hole for slidably receiving a tubular member in an axial direction is formed in a wall surface of the suction part configured in a cylindrical shape.
While forming a suction port on one end side in the axial direction of the suction tube formed in a cylindrical shape and a discharge port on the other end side,
The suction part formed in the suction port of the suction cylinder has the suction structure according to any one of claims 1 to 3,
A suction adapter characterized in that a pressure line connecting means connectable to a line for supplying pressurized air or other pressurized fluid is formed in the spray nozzle in the suction structure.
An air gun body having a fluid passage through which pressurized air is introduced and discharged from the tip;
It consists of a suction cylinder connected to the tip side of the air gun body,
The suction part existing on the tip side of the suction cylinder comprises the suction structure according to any one of claims 1 to 3,
A suction-type cleaning gun, wherein pressurized air introduced into an air gun body is supplied to at least an injection nozzle constituting a suction structure and air is discharged from the tip thereof.