JPH0639144U - Fluid type transfer device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a fluid type transfer device capable of controlling the transfer speed of gas, powder or the like, and capable of operating a valve element with a light force. [Constitution] It is composed of a transfer tube 1 and a handle 2. The transfer tube body 1 includes a first tubular body 3 and a second tubular body 9,
An inner cylinder 16 is provided inside this, an injection nozzle 23 is formed between the transfer pipe body 1 and the inner cylinder 16, and a transfer pipe line 21 for transferring an object to be transferred by the ejector effect is formed inside the transfer pipe body 1. To do. Further, the valve body 38 provided in the gas passage 35 inside the handle 2 is configured to be operated by the push rod 47 via the cam 43.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hand-type fluid transfer device for transferring gas, liquid, powder or the like by fluid pressure.

[0002]

[Prior art]

 BACKGROUND ART A transfer technique for sucking or transferring an object to be transferred including gas, liquid, particles or a mixture thereof by an ejector effect of a fluid which is obliquely injected into a pipe line is widely known.

For example, Japanese Utility Model Laid-Open No. 54-175873 discloses an air-blowing / air-blowing tool, in which an annular air-direction changing tool having a plurality of orifices opening in one direction is inserted and fixed in an air passage portion. At the same time, the orifice of this air-direction changing device can be mounted in a variable manner in the front-rear direction while being in communication with the air passage part, and by changing the jet angle of the air, it is possible to change the transfer direction of the object to be transferred in the pipeline. is there.

The transfer amount of the transferred object transferred in the transfer device utilizing the ejector effect is determined by the injection speed of the gas injected from the injection nozzle. When using this device, it is often necessary to control the transfer rate.

Conventionally, when it is desired to adjust the transfer amount in this type of transfer device, it has been carried out by controlling the flow rate by a flow rate control valve provided in a pipe that connects a normal jet gas supply source.

[0006]

[Problems to be solved by the device]

 However, controlling the flow rate by a flow rate control valve provided on a pipe separate from the injection nozzle, as in the conventional case, reduces the injection speed due to the pressure loss in the pipe line after the flow rate adjustment, and is preferable. The ejector effect does not appear. Moreover, when this transfer device is used as a cleaning tool, it is particularly inconvenient if the transfer amount cannot be adjusted at hand.

The present invention has been made in view of the above circumstances, and the purpose thereof is that a valve element provided in the middle of a gas flow path through which a compressed gas flows receives a large pressure of the compressed fluid. (EN) It is possible to provide a fluid transfer device that can be operated with a light force and can be easily operated by a person without power, such as a woman, and can be improved in operability.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention comprises a transfer tube, a circular cavity formed by aligning the axis with the transfer tube, and a transfer tube accommodated in the circular cavity. An inner cylinder forming a transfer conduit for transferring an object, a gas chamber formed between the circular cavity and the inner cylinder, and a center line of the axis of the transfer conduit provided at at least one end of the circular cavity. And a step portion formed by a peripheral surface inscribed in two imaginary right circular conical surfaces that are symmetrical to each other, and a transfer pipe line provided between the step portion and the transfer tube body provided in the inner cylinder through the space. And a grip provided on the transfer pipe body, and a gas flow path which is provided inside the grip and communicates with the gas chamber to supply compressed gas. A valve body that is movable in the gas flow direction and that opens and closes the gas flow path in the middle of the gas flow path; Has a push rod that can advance and retreat in a direction substantially perpendicular to the flow direction of the gas flowing through the gas flow path, and a contact surface that abuts against this push rod and the valve body. It is composed of a cam that opens the valve body.

[0009]

[Action]

 When the push rod provided on the handle is pushed, the cam rotates and pushes down the valve body.Therefore, even if the valve body receives the pressure of compressed gas, it can be opened with a light force by the cam. The compressed gas supplied from the compressed gas supply source by the valve is supplied to the gas chamber of the transfer pipe via the gas flow passage provided in the handle, and the compressed gas in this gas chamber is discharged from the injection nozzle to the pipe. It is jetted at high speed. At this time, since the stepped portion forming the injection nozzle and the loose portion of the inner cylinder are formed by the peripheral surface inclined with respect to the axis of the pipe line, the ejector effect generated at the tip of the injection nozzle is formed in the pipe line. In contrast to this, the object to be transferred has a directivity, and therefore the object to be transferred in the conduit is transferred in the injection direction of the compressed gas.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show the overall structure of a hand-type fluid transfer device. Reference numeral 1 is a transfer tube body, and 2 is a handle which can be attached to and detached from the transfer tube body 1. The transfer pipe body 1 will be described. Reference numeral 3 is a first tubular body formed by die casting or the like, and a pipeline 3a is formed therein.

At the base end of the first tubular body 3, there is provided a circular cavity 4 having a diameter larger than that of the duct 3a and coinciding with the axis o of the duct 3a. A fixing screw portion 5 and an adjusting screw portion 6 are engraved.

A ring 7 is press-fitted into the end of the circular cavity 4, and a step portion 8 is formed in the ring 7 between the ring 7 and the inner surface of the conduit 3a. On the end face of the stepped portion 8, a peripheral face is formed along a virtual right circular conical face 8a with the axis o as the center line and the apex point inside the circular cavity 4 to form a truncated cone-shaped projection.

Reference numeral 9 is a second tubular body formed by die casting or the like, and a pipe line 9 a is formed in the same manner as the first tubular body 3. A circular cavity 10 having a diameter larger than that of the duct 9a is provided at the proximal end of the second tubular body 9 and has a diameter larger than that of the duct 9a. 11 and an adjusting screw portion 12 are engraved.

A ring 13 is press-fitted into the end of the circular cavity 10, and a step portion 14 is formed in the ring 13 with the inner surface of the conduit 9a. The end face of the stepped portion 14 is formed with a peripheral surface along an imaginary right circular conical surface 14a symmetrical with the imaginary right circular conical surface 8a with the axis o as the center line and the apex as the inner side of the circular cavity 10 and formed in the opposite direction. It forms a truncated cone-shaped protrusion.

The adjusting screw portion 12 of the second tubular body 9 is adapted to be detachably screwed to the adjusting screw portion 6 of the first tubular body 3, and is attached to the end portion of the adjusting screw portion 12. An O-ring 15a that seals between the outer peripheral surface and the inner peripheral surface of the first tubular body 3 is fitted.

Reference numeral 16 is an inner cylinder, and an O-ring 15b is fitted on the outer peripheral surface thereof, and an external thread portion 17 screwed into the fixing screw portion 5 of the circular cavity 4 is engraved. ing. At the base end portion of the inner cylinder 16 are provided an alignment portion 18 that closely adheres to the inner circumference of the circular cavity 4 and an end surface 19 corresponding to the stepped portion 8 so as to be airtight in the circular cavity 4 of the first tubular body 3. It is sealed and fixed to.

The male thread portion 17, the matching portion 18, and the outer diameter portion other than the end surface 19 of the inner cylinder 16, that is, the tip end portion are formed in a loose fitting portion 20 having an outer diameter smaller than the inner diameter of the circular cavity 4. There is. The inner cylinder 16 fixed to the first tubular body 3 is inserted into the circular cavity 10 of the second tubular body 9 and coupled by screwing the adjusting screw portions 6 and 12.

As described above, the inner diameter portions of the first and second annular bodies 3 and 9 and the inner diameter portion of the inner cylinder 16 are formed to have the same inner diameter, and are formed in the transfer pipeline 21 for transferring the transferred object. In addition, the space between the inner peripheral surface of the circular cavity 10 and the outer peripheral surface of the mating portion 20 is formed into an annular gas chamber 22.

Further, by forming the tip end portion of the loose fitting portion 20 into a funnel-shaped end face corresponding to the projection of the step portion 14 of the circular cavity 10, the first chamber from the gas chamber 22 on the second tubular body 9 side is formed. An injection nozzle 23 directed to the conduit 3a of the tubular body 3 is formed.

A mounting base 25 is integrally projectingly provided on an outer wall of the base end portion of the first tubular body 3. A male joint 26 having a connection port 26a communicating with the gas chamber 22 is provided at the center of the mount 25 so as to project therefrom.

An O-ring 15c is fitted on the outer peripheral surface of the male joint 26, and a male screw portion 26b is engraved. Further, the mounting base 25 is provided with two engaging holes 27, 27 with the male joint 26 interposed therebetween. Then, the handle 2 is detachably attached to the attachment base 25.

Next, the handle 2 will be described with reference to FIG. 3. Reference numeral 28 is a handle body formed by die casting or the like, and a coupling portion 29 having the same shape as the mount 25 is formed at the upper end portion. ing. A fitting hole 30 is formed in the connecting portion 29, and a female joint 31 connected to the male joint 26 is rotatably fitted in the fitting hole 30.

An O-ring 15 d is fitted on the outer peripheral surface of the female side joint 31, and a parallel pin 32 engaged with the inner peripheral surface of the fitting hole 30 is interposed. Further, at the center of the female joint 31, there is provided a connection port 31b having a female thread portion 31a screwed to the male thread portion 26b of the male joint 26, and the connection port 31b is the connection port of the mounting base 25. It has the same inner diameter as 26a.

The female joint 31 is integrally provided with a flange portion 33 having a knurled non-slip portion, and a part of the outer peripheral surface of the flange portion 33 is cut into a part of the joint portion 29. The cutout portion 29a is provided so as to project to the outer surface of the handle body 28.

Further, engaging pins 34, 34 are projected on the coupling part 29 with the female joint 31 interposed therebetween, and in a state of engaging with the engaging holes 27, 27 of the mounting base 25, the male side jaws are formed. The female joint 31 is connected to the int 26.

Inside the handle main body 28, a gas passage 35 is provided, one end of which communicates with the connection port 31 b, the other end of which opens to the bottom of the handle main body 28 and which guides compressed gas to the gas chamber 22. There is.

A valve seat 37 having a packing 36 is provided in the middle of the gas flow path 35, and a valve body 38 movable in the flow direction of the compressed gas is provided on the valve seat 37 so as to be able to come into contact with and separate from the valve seat 38. . The valve body 38 is biased in the valve closing direction by a spring 40 supported by a spring receiving body 39, and a protruding pin 38a is integrally projectingly provided on the valve body 38.

The gas passage 35 located above the valve seat 37 is formed in the wide width portion 41, and the wide width portion 41 is provided with a cam 43 rotatable about a pivot pin 42 as a fulcrum. The cam 43 is fan-shaped and has a vertical surface 43b that is substantially perpendicular to the bottom surface 43a. The bottom surface 43a of the cam 43 abuts on the protruding pin 38a of the valve body 38, and the vertical surface 43b faces an opening / closing operation portion 44 described later.

The opening / closing operation section 44 will be described. A front portion of the handle main body 28, that is, a portion located at a finger when the handle main body 28 is gripped by a hand, is perpendicular to the gas flow path 35. A screw hole 45 that opens in the direction is formed. A guide cylinder 46 is screwed into the screw hole 45, and the guide cylinder 46 and the screw hole 45 are sealed by an O-ring 15e.

A push rod 47 is inserted into the guide cylinder 46 so as to be movable back and forth in a direction substantially perpendicular to the flow direction of the compressed gas, and the push rod 47 and the guide cylinder 46 are sealed by an O-ring 15 f. The tip end portion of the push rod 47 contacts the vertical surface 43b of the cam 43, and the push button 48 is fixed to the base end portion. A spring 49 is interposed between the push button 48 and the guide cylinder 46 to urge the push rod 47 in the backward direction.

A connection pipe body 50 connected to the gas flow path 35 is provided at the bottom of the handle main body 28, and the connection pipe body 50 communicates with a high pressure hose 51 communicating with a compressed gas supply source (not shown). Are connected.

Next, the operation of the fluid transfer device configured as described above will be described. As shown in FIGS. 4 and 5, in the state where the inner cylinder 16 is fixed to the first tubular body 3 side, the compressed gas supplied from the compressed gas supply source through the high pressure hose 51 is the gas of the handle body 28. Although being guided to the flow path 35, the pressure of the compressed gas acts on the valve body 38 in the valve closing direction.

From this state, when the push button 48 is pushed against the urging force of the spring 49 with the fingers while holding the handle body 28, the cam 43 is rotated clockwise by the tip of the push rod 47. Move.

Due to the rotation of the cam 43, the valve body 38 is pushed down against the urging force of the spring 40 via the projecting pin 38 a, the valve body 38 is opened apart from the valve seat 38, and the gas flow path 35 Of the compressed gas flows into the gas chamber 22 through the connection ports 26a and 31b. The compressed gas in the gas chamber 22 is injected into the transfer pipe 21 at high speed through the injection nozzle 23.

At this time, due to the ejector effect generated at the tip of the injection nozzle 23, the object to be transferred in the transfer pipeline 21 is transferred from the second tubular body 9 toward the first tubular body 3 at a high speed, and the second tubular body 3 is transferred. A suction force appears at the open end of 9 and a jetting force appears at the open end of the first tubular body 3.

Here, when the second tubular body 9 is turned to change the screwing width of the adjusting screw portions 12 and 6 and the distance between the first and second tubular bodies 3 and 9 is changed, the circular cavity 10 The length in the direction along the axis o of changes.

As the length of the circular cavity 10 changes, the distance between the step portion 14 and the end of the inner cylinder 16 changes, the opening degree of the injection nozzle 23 changes, and the injection nozzle 23 ejects toward the transfer conduit 21. It is possible to change the ejection speed of the compressed gas.

FIG. 6 shows a state in which the inner cylinder 16 is replaced, that is, the left and right are arranged in reverse, the inner cylinder 16 is fixed to the second tubular body 9, and the first tubular body 3 is loosely fitted. By replacing the inner cylinder 16 in this way, the tip of the loose part 20 can be formed into a funnel-shaped end face corresponding to the protrusion of the step 8 of the circular cavity 4, and the first tubular body 3 side An injection nozzle 23 is formed from the gas chamber 22 toward the pipe line 9a of the second tubular body 9.

Therefore, the object to be transferred in the transfer pipe line 21 is transferred from the first tubular body 3 toward the second tubular body 9 at high speed, and the suction force is applied to the open end of the first tubular body 3. A jetting force appears at the open end of the second tubular body 9.

Further, since the transfer tube 1 and the handle 2 are detachable, by preparing a plurality of types of transfer tube 1 having different tube diameters, lengths, etc., the handle 2 can be used according to the purpose of use. The transfer tube 1 can be selectively attached.

In this case, by turning the flange portion 33 of the female joint 31 provided on the handle body 28 with fingers, the female thread portion 31 a of the female joint 31 is different from the male thread portion 26 b of the male joint 26. At the same time, the engagement pins 34, 34 are disengaged from the engagement holes 27, 27, and the male side joint 26 and the female side joint 31 are separated from each other, so that they are attached to the mounting base 25 of the first tubular body 3. The connecting portion 29 of the handle main body 28 can be separated.

Therefore, the transfer tubes 1 having different tube diameters, lengths and the like prepared separately can be attached to the handle 2, and a plurality of types of transfer tubes 1 can be attached to one handle 2.

Moreover, by making the transfer tube 1 and the handle 2 detachable, the handle 2 is detached, and only the transfer tube 1 is attached, for example, in the vicinity of the cutting portion of the machine tool to suck or cut chips. It can also be used for blowing away.

In addition, in the above-mentioned embodiment, the step portions 8 and 14 are formed on the rings 7 and 13, but these may be formed integrally with the first and second tubular bodies 3 and 9. However, by providing the step portions 8 and 14 on the rings 7 and 13 which are separate members, the surface hardening treatment and the corrosion resistance treatment of the rings 7 and 13 can be easily performed, and the durability of the injection nozzle 23 can be improved.

Further, although the cleaning air gun has been described in the above-mentioned embodiment, it is provided in the middle of the gas flow path, or provided in the transport passage for the particles or the like to be used for transporting the gas, the particles or the like. be able to.

[0047]

[Effect of device]

 As described above, according to the present invention, since the opening of the injection nozzle can be arbitrarily adjusted and the injection speed can be controlled, it is possible to transfer gas, powder or the like depending on the purpose of use. The speed can be adjusted.

Further, since the valve body provided in the gas flow path of the handle is opened by the push rod via the cam, the valve body can be operated with a light force even if it receives a large pressure of compressed gas. Therefore, even a weak person such as a woman can easily operate and improve operability. Further, the size of the cam can be changed according to the size of the transfer tube, and there is an effect that it can be operated with a light force regardless of whether it is for high pressure or low pressure.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a fluid type transfer device showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a transfer tube body and a handle of the embodiment are separated.

FIG. 3 is a vertical cross-sectional side view showing an enlarged main part of the embodiment.

FIG. 4 is a vertical cross-sectional side view of the transfer tube body in a state where the inner cylinder and the second tubular body of the embodiment are separated.

FIG. 5 is a vertical cross-sectional side view of the transfer tube body for explaining the operation of the embodiment.

FIG. 6 is a vertical cross-sectional side view of the transfer tube body in a state where the inner cylinder of the embodiment is replaced.

[Explanation of symbols]

1 ... Transfer tube body, 2 ... Handle, 4, 10 ... Circular cavity, 8, 14 ...
Step portion, 16 ... Inner cylinder, 20 ... Engagement portion, 21 ... Transfer line, 2
2 ... Gas chamber, 23 ... Injection nozzle, 35 ... Gas flow path, 38
... Valve element, 43 ... Cam, 47 ... Push rod.

Claims (1)

[Scope of utility model registration request] 1. A transfer pipe body, a circular cavity formed by aligning an axis line with the transfer pipe body, and a transfer pipe line which is housed in the circular cavity and which conveys an object to be transferred. Inner cylinder, a gas chamber formed between the circular cavity and the inner cylinder, and two imaginary right circular cones provided at at least one end of the circular cavity and symmetrical about the axis of the transfer conduit. A step portion formed by a peripheral surface inscribed in the surface and an injection nozzle which is provided in the inner cylinder and is loosely engaged with the transfer pipe body through a space to form an opening toward the transfer pipe line are formed. And a grip provided on the transfer pipe body, a gas passage provided inside the grip to communicate with the gas chamber to supply compressed gas, and a gas passage in the middle of the gas passage. A valve body that is movable in the flow direction and that opens and closes the gas flow path, and a method of flowing the gas that is provided in the handle and flows through the gas flow path. A push rod that can move back and forth in a direction substantially perpendicular to the direction, and a cam that has a contact surface that comes into contact with the push rod and the valve element and that is rotated by the push operation of the push rod to open the valve element. A fluid-type transfer device comprising: