JP7325127B2 - Jet pipe nozzle unit - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law Date of sale See separate sheet Sales destination See separate sheet Publisher Yamaho Kogyo Co., Ltd.

TECHNICAL FIELD The present invention relates to a jet pipe nozzle unit used for a spray rod or the like of a liquid spraying device.

A liquid spraying device that sprays chemicals or sprinkles water has a spray rod consisting of a long spout pipe with a plurality of spout holes drilled in the longitudinal direction, and a plurality of nozzles attached at the positions of the spout holes of the spout pipe. is used to simultaneously inject chemicals from the respective nozzles of the spray rod so that the chemicals can be efficiently sprayed over a wide area.

In the liquid spraying apparatus as described above, the nozzle is generally attached to the jet pipe by either a method of directly screwing the nozzle mounting portion into the jet pipe or a method of using a mounting member.

As one of the latter methods, there is known a method of clamping the jet pipe between a pair of clamps (hereinafter referred to as "lower clamp" and "upper clamp") that serve as mounting members (for example, See Patent Document 1.).

5 and 6 show an example of a jet pipe nozzle unit (hereinafter also referred to simply as a "nozzle unit") including the mounting member and nozzle of the above type. This nozzle unit 51 is attached to the position where the ejection hole 11a of the ejection pipe 11 is provided, and is formed integrally with a disk-shaped nozzle 52, a nozzle holder 53 for holding the nozzle 52, and the nozzle holder 53. A lower clamp 54 and an upper clamp 55 arranged to face the lower clamp 54 with the injection pipe 11 interposed therebetween are provided.

The nozzle holder 53 has a cylindrical holding portion 53a in which a thread is formed on the outer periphery and a small-diameter portion of the nozzle 52 on the supply side is fitted on the inner periphery. and a liquid lead-out passage 53b for leading the liquid from the ejection pipe 11 to the supply side of the nozzle 52. 11a. A filter 56 and a packing 57 are incorporated on the supply side of the nozzle 52 in the inner space of the holding portion 53a. Further, an O-ring 58 for liquid-tight sealing between the injection pipe 11 and the nozzle holder 53 is incorporated around the insertion cylinder portion 53c.

A cap 59 for retaining the nozzle 2 is provided on the radially outer side of the nozzle holder 53 . The cap 59 is composed of a cap body 59a screwed to the holding portion 53a of the nozzle holder 53, and a lock nut 59b that engages with the nozzle holder 53 to prevent the cap body 59a from loosening. The nozzle 52, the filter 56, and the packing 57 are retained by engaging with the ejection-side end of the nozzle 52. As shown in FIG.

The lower clamp 54 and the upper clamp 55 have tube receiving grooves 54a and 55a, respectively, into which a part of the outer circumference of the injection tube 11 is fitted. The lower clamp 54 also has a pair of connection arms 54b extending from both edges of the tube receiving groove 54a toward the upper clamp 55 side. is provided with an engaging groove 54c extending to the On the other hand, the upper clamp 55 is provided with a pair of vertical holes 55b for receiving the connection arms 54b of the lower clamp 54, and a pair of horizontal holes 55c penetrating in a direction perpendicular to the vertical holes 55b.

Each connecting arm 54b of the lower clamp 54 is inserted into the vertical hole 55b of the upper clamp 55, and the engaging groove 54c of each connecting arm 54b and the horizontal hole 55c of the upper clamp 55 are overlapped with each other. It is fixed to the ejection pipe 11 by a lock member 60 in a state of being assembled to the ejection pipe 11 so that the ejection pipe 11 is sandwiched between the receiving grooves 54a and 55a.

The lock member 60 is a U-shaped member made of resin, and has a pair of arms 60a with claws 60b at the tips thereof. Then, each arm 60a of the lock member 60 is bent and inserted into the lateral hole 55c of the upper clamp 55, and the central portion of each arm 60a is fitted into the engagement groove 54c of the connecting arm 54b of the lower clamp 54. By engaging the claw 60b of each arm 60a with the opening edge of the lateral hole 55c of the upper clamp 55 on the outlet side, the locking member 60 is prevented from coming off, and both clamps 54 and 55 are fixed to secure the nozzle unit 51 to the jet tube. 11 can be attached (attached).

Japanese Patent No. 6228172

The conventional nozzle unit 51 described above can be easily attached to the jet pipe 11 by simply inserting the pair of arms 60 a of the lock member 60 into the lateral holes 55 c of the upper clamp 55 . However, when removing from the jet tube 11, a grip portion of a tool such as pliers is grasped, and the inwardly sharp tip portion simultaneously presses the pawls 60b of each arm 60a of the locking member 60 so that the pawls 60b and the pawls 60b are pressed together. It is necessary to pull out the locking member 60 in a state in which the engagement of the upper clamp 55 is released, which makes the work complicated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a jet pipe nozzle unit that can be easily attached to and detached from a jet pipe of a liquid spraying device.

In order to solve the above problems, the present invention includes a nozzle, a nozzle holder that holds the nozzle, a lower clamp that is connected to the nozzle holder, and an upper clamp that is arranged to face the lower clamp. , the lower clamp and the upper clamp each have a pipe receiving groove into which a part of the outer periphery of the jet pipe is fitted, and the lower clamp and the upper clamp are attached to the jet pipe in a state in which the jet pipe is sandwiched between the respective pipe receiving grooves. In the jet pipe nozzle unit, the means for fixing the lower clamp and the upper clamp to the jet pipe includes a pair of connection arms extending from both edges of the tube receiving groove of the lower clamp toward the upper clamp side, and a pair of connecting arms of the upper clamp. A configuration is adopted in which the tube receiving groove and the fastening member disposed on the opposite side are screwed together.

According to the above configuration, the nozzle unit can be attached to the jet pipe only by fitting the lower clamp and the upper clamp to the outer periphery of the jet pipe, and rotating the fastening member so that it is threadedly coupled to the connecting arm of the lower clamp. When removing the nozzle unit from the jet pipe, it is only necessary to rotate the fastening member in the opposite direction from when it was installed to release the screw connection with the connection arm of the lower clamp, so conventional tools are used. It can work more efficiently than other methods.

Here, it is preferable that the upper clamp is provided with a vertical hole through which each connection arm of the lower clamp is passed. By doing so, the entire nozzle unit becomes compact and the appearance is improved.

Further, the nozzle holder includes a cylindrical holding portion in which the nozzle is fitted, and a liquid lead-out path for leading the liquid from the injection pipe to the supply side of the nozzle by communicating the internal passage of the injection pipe with the inner space of the holding portion. is provided, the insertion cylinder part inserted into the injection pipe so as to form the liquid lead-out path is made a separate body, and the whole except for the insertion cylinder part is formed integrally with the lower clamp. Thus, the nozzle unit as a whole can be manufactured easily without increasing the number of parts.

As described above, the jet pipe nozzle unit of the present invention includes a lower clamp and an upper clamp that face each other across the jet pipe. Since the lower clamp and the upper clamp are fixed to the injection pipe, both attachment and detachment to the injection pipe can be performed very easily simply by rotating the fastening member.

Side view of a spray rod using the nozzle unit of the embodiment FIG. 2 is an exploded perspective view of the nozzle unit of FIG. 1; Vertical front view of the nozzle unit of FIG. Cross-sectional view along the IV-IV line in Fig. 3 Disassembled perspective view of conventional nozzle unit Vertical front view of the nozzle unit of FIG.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. FIG. 1 shows a spray rod using a jet pipe nozzle unit 1 of the embodiment. This spray rod has nozzle units 1 attached to the positions of ejection holes 11a (see FIG. 2) which are provided at predetermined intervals in the longitudinal direction of an elongated ejection pipe 11, respectively.

The general structure of this nozzle unit 1 is the same as the conventional one shown in FIGS. 5 and 6 described above. 2 to 4, the nozzle unit 1 includes a disk-shaped nozzle 2, a nozzle holder 3 for holding the nozzle 2, a lower clamp 4 integrally formed with the nozzle holder 3, and an ejection pipe. The lower clamp 4 and the upper clamp 5 are mounted on the injection pipe 11 in such a manner that the injection pipe 11 is sandwiched between the lower clamp 4 and the upper clamp 5. The nozzle holder 3, the lower clamp 4 integrated therewith, and the upper clamp 5 are all made of resin.

The difference between this nozzle unit 1 and the conventional one lies in a part of the structure of the nozzle holder 3 and the fixing mechanism of the lower clamp 4 and the upper clamp 5, which will be described below.

The nozzle holder 3 has, as in the conventional art, a cylindrical holding portion 3a in which a thread is formed on the outer periphery and a small-diameter portion of the nozzle 2 on the supply side is fitted on the inner periphery; It has a liquid lead-out passage 3b for leading the liquid from the jet pipe 11 to the supply side of the nozzle 2 by communicating the inner space of the nozzle 3a. However, unlike the conventional art, the insertion cylinder portion 3c forming the liquid lead-out path 3b is a separate body, and the entire device except for the insertion cylinder portion 3c is integrally formed with the lower clamp 4. As shown in FIG.

The insertion tube portion 3c of the nozzle holder 3 is partly fitted into a counterbore-shaped recess 3d formed on the main body side, and an annular projection 3e formed on the outer periphery thereof is formed on the inner periphery of the recess 3d. It is retained by engaging with the annular groove. The engagement between the annular projection 3e and the annular groove can be easily performed by snap fitting. In this state where the cylindrical insertion portion 3c is fitted into the concave portion 3d on the main body side so that the liquid lead-out path 3b is continuous, the end of the cylindrical insertion portion 3c on the protruding side is connected to the ejection hole 11a of the injection pipe 11. It is designed to be plugged into

Here, it is preferable that the insertion tube portion 3c is made of metal such as stainless steel or brass. By making only the insertion tube portion 3c of the nozzle holder 3 metal, the entire nozzle unit 1 is kept lightweight, and the insertion tube portion 3c is prevented from being damaged when a load is applied to the nozzle unit 1 from the outside. can be prevented.

In addition, a filter 6 and packing 7 are incorporated on the supply side of the nozzle 2 in the inner space of the holding portion 3a of the nozzle holder 3, and the injection pipe 11 and the nozzle holder 3 are arranged around the insert cylinder portion 3c. An O-ring 8 is incorporated to provide a fluid-tight seal between the

Here, the nozzle 2 has a jet plate 2b having two spray holes 2a and a peripheral portion thereof held by a cylindrical jet plate holder 2c. The small-diameter portion of the jet plate holder 2c is fitted to the tip portion of the holding portion 3a in contact with the end face of the holding portion 3a of the holder 3. As shown in FIG. The filter 6 has a hemispherical mesh body 6a and a cylindrical mesh holder 6b that holds the periphery of the mesh body 6a. It is fitted in the inner periphery of the holding portion 3a in a state of being held in place.

As a result, the liquid supplied from the internal passage 11b of the jet pipe 11 flows into the inner space of the holding portion 3a through the liquid lead-out passage 3b of the nozzle holder 3, passes through the packing 7 and the filter 6, and flows into the nozzle 2. It is designed to be sprayed to the outside from the spray holes 2a.

A cap 9 similar to the conventional one is provided on the radially outer side of the nozzle holder 3 . The cap 9 is composed of a cap body 9a screwed to the holding portion 3a of the nozzle holder 3 and a lock nut 9b that engages with the nozzle holder 3 to prevent the cap body 9a from loosening. It engages with the ejection side end of the ejection plate holder 2c of the nozzle 2 to prevent the nozzle 2, the filter 6 and the packing 7 from coming off.

The lower clamp 4 and the upper clamp 5 have tube receiving grooves 4a and 5a, respectively, into which a part of the outer circumference of the injection tube 11 is fitted. The lower clamp 4 also has a pair of connection arms 4b extending from both edges of the tube receiving groove 4a toward the upper clamp 5 side. Each connecting arm 4b is formed to have an arcuate cross-section, and a portion of an external thread is provided on the outer surface of the distal end portion. On the other hand, the upper clamp 5 is provided with a pair of vertical holes 5b having the same sectional shape as the connection arms 4b of the lower clamp 4 and through which the connection arms 4b pass.

Both clamps 4 and 5 are assembled to the injection pipe 11 so that each connection arm 4b of the lower clamp 4 passes through the vertical hole 5b of the upper clamp 5 and the injection pipe 11 is sandwiched between the respective pipe receiving grooves 4a and 5a. In this state, the upper clamp 5 is fixed to the injection pipe 11 by a lidded cylindrical fastening member 10 arranged on the opposite side of the pipe receiving groove 5a.

That is, the lower clamp 4 and the upper clamp 5 are fixed to the injection pipe 11 by rotating the fastening member 10 and threading the internal thread formed on the inner circumference thereof with the external thread of each connecting arm 4b of the lower clamp 4. be able to.

This nozzle unit 1 has the structure described above, and is attached to the jet pipe 11 by fitting the lower clamp 4 and the upper clamp 5 to the outer periphery of the jet pipe 11, and connecting the fastening member 10 to the connection arm 4b of the lower clamp 4. It can be easily done by simply rotating it so that it is screwed together. Further, when removing from the injection pipe 11, it is only necessary to rotate the fastening member 10 in the opposite direction from when it was attached to release the threaded connection with the connecting arm 4b of the lower clamp 4. and work efficiently.

Further, in this nozzle unit, since the upper clamp 5 is provided with the vertical holes 5b through which the connection arms 4b of the lower clamp 4 are passed, the entire nozzle unit is compact and has a good appearance.

Furthermore, since the inserting cylinder portion 3c of the nozzle holder 3 is a separate member and the whole except for the inserting cylinder portion 3c is integrally formed with the lower clamp 4, the total number of parts of the nozzle unit is smaller than that of the conventional one. There is also the feature that it is easy to manufacture without changing.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the meaning described above, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

For example, in the embodiment, in order to make the entire nozzle unit compact, the pair of connection arms of the lower clamp are passed through the vertical hole of the upper clamp. good too. In addition, from the viewpoint of ease of manufacture, it is preferable that the nozzle holder is formed integrally with the lower clamp, with the tubular insertion portion being separate as in the embodiment. It may be molded or formed separately from the lower clamp and connected to each other.

Further, the method of threading the connection arm of the lower clamp and the fastening member is not limited to the method of the embodiment, and a method of threading the female thread formed on the connection arm and the male thread formed on the fastening member, etc., may be adopted. can also

1 Nozzle unit 2 Nozzle 3 Nozzle holder 3a Holding part 3b Liquid lead-out path 3c Insertion cylinder part 4 Lower clamp 4a Tube receiving groove 4b Connection arm 5 Upper clamp 5a Tube receiving groove 5b Vertical hole 6 Filter 7 Packing 8 O-ring 9 Cap 9a Cap Main body 9b Lock nut 10 Fastening member 11 Ejection pipe 11a Ejection hole 11b Internal passage

Claims (3)

a nozzle, a nozzle holder holding the nozzle, a lower clamp connected to the nozzle holder, and an upper clamp arranged to face the lower clamp,
The lower clamp and the upper clamp each have a pipe receiving groove into which a part of the outer circumference of the jet pipe is fitted, and the lower clamp and the upper clamp are attached to the jet pipe in such a manner that the pipe receiving grooves sandwich the jet pipe. In the nozzle unit for the jet pipe,
Means for fixing the lower clamp and the upper clamp to the injection pipe are arranged on a pair of connection arms extending from both edges of the tube receiving groove of the lower clamp toward the upper clamp side and on the opposite side of the tube receiving groove of the upper clamp. A nozzle unit for a jet pipe, characterized in that it is screwed together with a fastening member. 2. The jet pipe nozzle unit according to claim 1, wherein the upper clamp is provided with a vertical hole through which each connection arm of the lower clamp is passed. The nozzle holder has a cylindrical holding portion in which the nozzle is fitted, and a liquid lead-out passage for leading the liquid from the injection pipe to the supply side of the nozzle by communicating the internal passage of the injection pipe with the inner space of the holding portion. and an insertion cylinder portion inserted into the injection pipe so as to form the liquid lead-out path is a separate body, and the entirety except for the insertion cylinder portion is integrally formed with the lower clamp. 3. The jet pipe nozzle unit according to claim 1 or 2.

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