JP2017013039A - Nozzle unit for injection pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attachment of a nozzle unit to an outer periphery of an injection pipe, and at the same time, enhance reliability of prevention of detachment by mischief and falling.SOLUTION: A nozzle unit comprises a lock member 5 formed by suspending arms 5b which can be elastically deformed on both ends of a bridge part 5a. A nozzle holder 9 has arm engagement parts 3d, and the arms 5b of the lock member 5 are engaged with the arm engagement parts 3d disposed on the nozzle holder 9 in a state in which the lock member 5 strides over an upper clamp 4, and connection of the upper clamp 4 to the nozzle holder 9 is performed by the lock member 5 which serves as a fastener.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a nozzle unit used in a spray bottle of a liquid spraying device, and more specifically, a jet unit that facilitates mounting on the outer periphery of a jet tube, and also has improved reliability for prevention of removal due to mischief and dropping prevention. The present invention relates to a pipe nozzle unit.

  Some liquid spraying devices that spray or spray chemicals use a spray tub provided with a nozzle (jet port) on the outer periphery of a jet tube (for example, see Patent Documents 1 and 2 below).

  In the liquid spraying device shown in Patent Documents 1 and 2 and the like, a plurality of nozzles are mounted on the outer periphery of the long jet tube at appropriate intervals to form a spray tub, and a drug or the like is simultaneously formed from the plurality of nozzles. By spraying, it is possible to efficiently spread onto a medium with a large area.

  Incidentally, the fixing of the nozzle to the outer periphery of the nozzle tube is generally performed by either a method using a fixture or a method of directly screwing the mounting portion into the nozzle tube.

  As one of the fixtures used in the former method, there is a type in which the jet tube is sandwiched between a pair of opposed clamps (for convenience of explanation, these are hereinafter referred to as a lower clamp and an upper clamp).

  An example of a nozzle unit provided with the fixture of the system is shown in FIG. In the figure, 1 is a nozzle unit, and 2 is a main body of the nozzle unit. The main body 2 includes a nozzle holder 9 having a passage hole 9a and a nozzle (not shown) held by the nozzle holder.

  The passage hole 9a is connected to the internal passage 12 of the injection tube 11, and the liquid flowing into the passage hole 9a from the internal passage 12 is ejected to the outside from the spray hole of the nozzle.

  The nozzle holder 9 is provided with a lower clamp 3 having a pipe receiving groove 3a having a semicircular cross section, and an upper clamp having the lower clamp 3 and a pipe receiving groove 4a having a semicircular cross section facing the pipe receiving groove 3a. 4, a fixture for fixing the main body 2 to the outer periphery of the injection tube 11 is configured.

  The illustrated fixture causes the half of the jet tube 11 (half of the cross section perpendicular to the longitudinal direction) to enter the tube receiving groove 3a of the lower clamp at a position where the passage hole 9a is connected to the internal passage 12 of the jet tube 11, and the upper clamp 4 is Fit to the outer periphery of the remaining half of the tube 11.

  And the upper clamp 4 is fastened with the screw 13 and the injection tube 11 is inserted between the lower clamp 3 of the nozzle holder. The screw rotation operation at this time is performed using a tool (driver).

JP 2014-103887 A JP 2001-96199 A

  Since the fixture shown in FIG. 8 fastens the upper clamp 4 with the screw 13, a tool is required for mounting the nozzle unit on the jet tube, and it is difficult to expect speeding up of the work.

  In addition, if a screw with a knob that can be operated by being pinched with a finger is used as the screw 13, it can be mounted without a tool, but the screw with a knob causes an increase in the size of the nozzle unit.

  Moreover, since anyone can operate the screw with the knob, it is difficult to say that it is preferable from the viewpoint of preventing the nozzle unit from being removed due to mischief.

  A structure in which the nozzle unit is fixed to the jet tube with a clip is also conceivable, but this is because the clip comes into contact with some obstacle and the engagement is naturally released, and the nozzle unit can be detached from the jet tube. Reliability and prevention of removal due to mischief are worse than those with screwing.

  Accordingly, an object of the present invention is to facilitate the mounting of the nozzle unit for the nozzle tube on the outer periphery of the nozzle tube, and at the same time, to improve the reliability of prevention of removal due to tampering and prevention of dropping.

In order to solve the above problems, in the present invention,
A main body portion including a nozzle and a nozzle holder for holding the nozzle, and an upper clamp connected to a lower clamp formed on the nozzle holder, the lower clamp and the upper clamp arranged to be opposed to each other, and opposed pipe receivers for receiving a jet pipe A nozzle unit for a nozzle tube that has grooves and that is mounted on the outer periphery of the nozzle tube by sandwiching the nozzle tube between the lower clamp and the upper clamp is configured as follows.

  That is, an elastically deformable arm is provided to hang down at both ends of the bridge portion, and a lock member is formed at the tip portion of the arm so that the claws protrude toward each other. An arm engaging portion for engaging the arm, and the arm of the locking member engages with the arm engaging portion of the lower clamp in a state where the lock member straddles the upper clamp, and the upper clamp with respect to the nozzle holder The connection is made using the lock member as a fastener.

Such a nozzle unit for a jet tube may have the following forms 1) and 2).
1) The nozzle holder has a vertical hole for receiving the arm, and a lateral hole for external release connected to the back end of the vertical hole, and a hole edge of the horizontal hole is configured as the arm engagement portion, and the arm engagement portion includes What is comprised so that the nail | claw of the arm front-end | tip of the said lock member may latch.

2) The lower clamp has a plug portion provided with the tube receiving groove in the center, and the upper clamp has a cap shape that fits the outer periphery of the plug portion, and an inner center portion of the center of the plug portion. The lower clamp plug portion is formed in a shape having a tube presser to be inserted into the tube receiving groove, and has a parallel-arranged groove into which the arm of the lock member is inserted from the side. The groove surface on the tip side of the member is configured as the arm engaging portion, and the longitudinal halfway of the arm of the lock member is engaged with the groove surface.

  In both forms of the nozzle unit for a jet tube, the upper clamp includes a bridge receiving groove for immersing the bridge portion of the lock member, and an arm insertion hole in which the arm is inserted and the claw at the tip of the arm engages at the insertion end point. The thing provided with is preferable.

  The bridge receiving groove provided in the upper clamp is processed on the top surface of the upper clamp in the former form, and is processed on the outer periphery of the peripheral wall of the upper clamp in the latter form.

  It is also preferable to provide a chamfer surface at a corner on the arm tip side or arm rear end side of the tip of the claw.

  In addition, the lower clamp and the upper clamp may be provided with a concave portion and a convex portion, which are fitted to each other at a position where both are positioned, corresponding to the mutual abutting surfaces of both the clamps.

  In the nozzle unit of the present invention, the lower clamp and the upper clamp provided in the nozzle holder are fitted to the outer periphery of the injection tube, and the upper clamp is connected to the nozzle holder by the lock member.

  To do this, it is only necessary to straddle the lock member over the upper clamp and insert the arm of the lock member into a position where the arm engages with the arm engaging portion of the nozzle holder.

  Therefore, the nozzle unit can be attached to the jet tube very easily.

  On the other hand, the nozzle unit attached to the jet tube can be removed by simultaneously removing the two claws provided on the lock member from the nozzle holder, thereby enabling the upper clamp to be connected to the nozzle holder. Is released and the nozzle unit is detached from the nozzle tube.

  In this way, it is necessary to remove the two claws from the arm engaging portion at the same time, and this work is difficult without a dedicated tool. Dropout is also reliably prevented.

  In addition, the nozzle unit is provided with an arm insertion hole through which the bridge receiving groove and arm pass through the outer surface of the upper clamp, and the bridge part and arm of the lock member are placed in the bridge receiving groove and arm insertion hole. It can be immersive and compact, and looks good.

  In addition, when the chamfer surface is provided at the corner of the tip of the claw, when releasing the claw from the nozzle holder, the arm of the lock member is engaged without damaging the lock member using a pliers or the like. Can be pushed in the release direction.

It is a side view which shows an example of the spray soot which employ | adopted the nozzle unit of one form of this invention. It is sectional drawing along the XX line of FIG. FIG. 2 is a perspective view showing the main body, the upper clamp, and the lock member of the nozzle unit in FIG. It is a longitudinal cross-sectional view which shows the other form of the nozzle unit of this invention. It is a disassembled perspective view of the nozzle unit of FIG. FIG. 5 is a cross-sectional view taken along line YY in FIG. 4. It is explanatory drawing of how to remove the lock member in the nozzle unit of FIG. It is a disassembled perspective view which shows the attachment structure with respect to the nozzle tube of the existing nozzle unit.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a nozzle unit for a jet tube according to the present invention will be described below with reference to FIGS.

  FIG. 1 shows an embodiment of a spray tub employing the nozzle unit of the present invention. The illustrated spray tub 10 is configured such that a plurality of nozzle units 1 are mounted on the outer periphery of a jet tube 11 at predetermined intervals.

  FIG. 2 shows a cross section taken along line XX in FIG. The illustrated nozzle unit 1 includes a main body 2, a lower clamp 3 included in the main body, an upper clamp 4 opposed to the lower clamp, and a fixture 6 including a lock member 5, a jet tube 11, and a main body. 2 is combined with an O-ring 7 that seals liquid tightly.

  The lower clamp 3, the upper clamp 4 and the lock member 5 constituting the illustrated fixture 6 are all made of resin.

  The main body 2 of the nozzle unit includes a nozzle 8 and a nozzle holder 9.

  Although the nozzle 8 illustrated what attached the nozzle hole 8d which hold | maintained the nozzle plate 8b which has the spray hole 8a with the nozzle plate holder 8c to the nozzle holder 9 using the bag nut 8e and the ring-shaped packing 8f, The form is not limited.

  8g is a lock nut that prevents the cap nut 8e from loosening, and is provided as necessary.

  The nozzle holder 9 has a passage hole 9 a that communicates with the internal passage 12 of the injection tube 11. The illustrated passage hole 9 a is a hole configured as a rectifying passage, and has an inlet opening at the tip of a cylindrical insertion portion 9 b inserted into a through hole 11 a provided in the injection tube 11.

  The O-ring 7 is attached to the outer periphery of the cylindrical insertion portion 9b and is sandwiched between the outer periphery of the jet tube 11 and the nozzle holder 9 to seal the space between the jet tube 11 and the nozzle holder 9 in a liquid-tight manner. .

  Therefore, the liquid supplied from the internal passage 12 of the injection tube flows into the passage hole 9a without leaking and is ejected to the outside from the spray hole 8a of the nozzle 8.

  The nozzle holder 9 is made of resin, and the upper side of the nozzle holder 9 in FIG. 2 is configured as the lower clamp 3 described above. The lower clamp 3 has a pipe receiving groove 3a having a semicircular cross section that allows half of the jet tube 11 (half of the cross section) to enter.

  In addition, two vertical holes 3b installed at a centrally symmetric position, an externally released horizontal hole 3c connected to the back end of each vertical hole, an arm engaging portion 3d formed at an intersection of these holes, and an upper clamp 4 And a positioning recess 3e (see FIG. 3) formed on the abutting surface. The vertical hole 3b is a hole in which a gap allowing elastic deformation of the arm 5b is formed between the lock member and an arm 5b described later.

  The upper clamp 4 is provided on the abutting side with the lower clamp 3 so as to protrude from the abutting surface with the lower clamp in correspondence with the semicircular tube receiving groove 4a facing the tube receiving groove 3a of the lower clamp and the recess 3e of the lower clamp. It has a convex portion 4b for positioning (also see FIG. 3).

  Moreover, it has a bridge receiving groove 4c for accommodating a bridge portion 5a (which will be described later) of the lock member 5 and an arm insertion hole (this is a vertical hole) 4d corresponding to the vertical hole 3b.

  The lock member 5 has a bridge portion 5a that fits in the bridge receiving groove 4c of the upper clamp 4 and an arm 5b that is provided to hang down at both ends of the bridge portion 5a.

  The arm 5b is an elastically deformable arm, and a claw 5c is formed at the tip of the arm so as to protrude toward the back. The arm 5b having the claw 5c functions as a so-called check claw.

  A chamfer surface 5d (see FIG. 2) for bringing the tip of the pliers, which will be described later, into surface contact, is provided at a corner on the tip side of the arm at the tip of the claw 5c.

  In the nozzle unit 1 configured in this manner, the cylindrical insertion portion 9b of the nozzle holder 9 is inserted into a through hole 11a provided in the injection tube 11, and half of the injection tube 11 is inserted into the tube receiving groove 3a of the nozzle holder 9 (see FIG. 2 in the attached state, the main body 2 is attached to the injection tube 11.

  Next, the upper clamp 4 is attached to the outer periphery of the tube 11 so that the other half of the outer periphery of the tube 11 is accommodated in the tube receiving groove 4a, and the upper clamp convex portion 4b is inserted into the lower clamp recess 3e. 3 and the upper clamp 4 are positioned.

  In this state, the lock member 5 is straddled over the upper clamp 4, and the arm 5b of the lock member 5 is inserted into the vertical hole 3b of the lower clamp 3 via the arm insertion hole 4d of the upper clamp.

  At this time, the arms 5b at both ends of the lock member 5 are elastically deformed in the direction in which the distal ends approach each other, and the elastic deformation causes the claw 5c to move to the center side of the lock member 5 from the arm engagement portion 3d of the lower clamp, In this state, the arm 5b enters the vertical hole 3b of the lower clamp. The arm 5b is elastically restored at a position where the claw 5c passes over the arm engaging portion 3d, and the claw 5c is locked to the arm engaging portion 3d.

  Thereby, the nozzle holder 9 and the upper clamp 4 are in a state of sandwiching the nozzle tube 11 therebetween, and the mounting of the nozzle unit 1 on the outer periphery of the nozzle tube 11 is completed.

In order to remove the nozzle unit 1 from the injection tube 11, the claw 5c at the tip of the arm of the lock member 5 locked to the arm engaging portion 3d is pushed inward from the outside of the lateral hole 3c.
When the latching state of the claw 5c with the arm engaging portion 3d is released in this way, the lock member 5 can be pulled off and the nozzle unit 1 can be removed.

  The removal may be performed using a pliers 14 as shown in FIG. The illustrated pliers 14 squeeze the grip portion 14a to close the distal end side, and simultaneously push and move the distal ends of the two arms 5b with sharp distal ends in side view.

  At this time, the tip of the pliers 14 is brought into surface contact with the chamfer surface 5d at the tip of the claw 5c. For this reason, the arm 5b is disengaged from the arm engaging portion 3d without damaging the lock member 5. Can be pushed in the direction of

  The nozzle unit 1 is often used in a small size whose outer diameter is less than 30 mm. In the nozzle unit of such a size, the size of the lateral hole 3c provided in the lower clamp 3 is also very small.

  Therefore, it is difficult to push and move the two arms 5b at the same time by the method of pushing the arm 5b by pushing the claw 5c with a pin or the like. Thereby, the prevention effect of removal by mischief increases.

  Moreover, since the holding state of the nozzle tube 11 by the nozzle holder 9 and the upper clamp 4 is maintained unless the lock member 5 is intentionally removed, the reliability of preventing the nozzle unit 1 from dropping from the nozzle tube is also a conventional product. It will be better.

4 to 6 of the accompanying drawings show other forms of the nozzle unit 1 of the present invention.
In the nozzle unit 1 shown in FIG. 2, the locking member 5 is prevented from coming off from the assembly position depending on the claw 5c at the tip of the arm. In particular, when it is made, the claw 5c is easily deformed and easily detached from the arm engaging portion 3d. Therefore, in the high pressure application, the reliability of the fastening of the nozzle holder 9 and the upper clamp 4 is concerned.

  The nozzle unit 1 in FIGS. 4 to 6 eliminates this concern. In the nozzle unit 1, the lower clamp 3 of the nozzle holder has a plug portion 3f having a tube receiving groove 3a in the center.

  Further, the upper clamp 4 is formed into a cap shape and a shape having a tube retainer 4e inserted into a tube receiving groove 3a formed in the plug portion 3f at the inner center, and the tube retainer 4e is plugged. It fits into the outer periphery of the plug portion 3f in a state of entering the hole at the center of the portion 3f.

  The plug portion 3f has an engagement groove 3g on the outer periphery, which is arranged in parallel and falls inward in the radial direction in which the arm 5b of the lock member 5 is inserted from the side.

  On the other hand, the upper clamp 4 has an arm insertion hole (this is a horizontal hole) 4d corresponding to the engagement groove 3g and a tube receiving groove 4a (see FIG. 5) for accommodating a half of the injection tube 11 on the peripheral wall. The groove surface on the distal end side of the plug portion of the joint groove 3g is used as the arm engaging portion 3d.

  The claw 5c at the tip of the arm 5b is locked to the opening edge of the arm insertion hole 4d at the insertion end point of the arm 5b with respect to the arm insertion hole 4d, thereby preventing the lock member 5 from being detached from the assembly position.

  The nozzle unit 1 of FIG. 4 is different from the nozzle unit 1 of FIG. In the nozzle unit 1 of FIG. 4, the arm 5b of the lock member enters the engagement groove 3g provided on the outer periphery of the plug portion 3f of the lower clamp, and the groove surface on the distal end side of the plug portion of the engagement groove 3g is the arm engagement portion. It becomes 3d, and the longitudinal halfway of the arm 5b is engaged there.

  Therefore, the fastening state of the nozzle holder 9 and the upper clamp 4 is more stable than the nozzle unit 1 shown in FIG. 2 which is dependent on the claw 5c, and high reliability of fastening and holding is ensured even in high pressure applications.

  Here, the case where the nozzle unit 1 faces downward and is mounted on the lower side of the jet tube 11 has been described as an example. However, the nozzle unit 1 is mounted sideways on the side of the jet tube 11. In other words, it is allowed to be mounted on the upper portion of the tube 11 in an upward direction.

  In addition, as an example of a product that employs the nozzle unit of the present invention, here, a spray bottle has been taken as an example. However, the nozzle unit of the present invention is used to be mounted on a fixed jet tube installed along a culture medium. Is also suitable.

DESCRIPTION OF SYMBOLS 1 Nozzle unit 2 Body part 3 Lower clamp 3a Pipe receiving groove 3b Vertical hole 3c Horizontal hole 3d Arm engaging part 3e Recessed part 3f Plug part 3g Engaging groove 4 Upper clamp 4a Pipe receiving groove 4b Convex part 4c Bridge receiving groove 4d Arm insertion hole 4e Jet Tube retainer 5 Lock member 5a Bridge portion 5b Arm 5c Claw 5d Chamfer surface 6 Mounting tool 7 O-ring 8 Nozzle 8a Spray hole 8b Spray plate 8c Spray plate holder 8d Spray port piece 8e Cap nut 8f Ring packing 8g Lock nut 9 Nozzle holder 9a Passage hole 9b Tubular insertion part 10 Spray bottle 11 Jet tube 11a Through-hole 12 Internal passage 13 Screw 14 Plier 14a Grip part

Claims (5)

A main body (2) including a nozzle (8) and a nozzle holder (9) for holding the nozzle, and an upper clamp (4) connected to a lower clamp (3) formed in the nozzle holder (9), The lower clamp (3) and the upper clamp (4) arranged to face each other have opposed pipe receiving grooves (3a, 4a) for receiving the jet pipe (11), respectively, and the lower clamp (3) and the upper clamp (4) A nozzle unit for a nozzle tube that sandwiches the nozzle tube (11) and is attached to the outer periphery of the nozzle tube,
An elastically deformable arm (5b) is provided hanging from both ends of the bridge portion (5a), and a claw (5c) is formed at the tip of the arm so as to protrude in a direction facing away from each other. Comprising
The nozzle holder (9) has an arm engaging portion (3d) for engaging the arm (5b), and the lock member (5) is in a state where the lock member (5) straddles the upper clamp (4). ) Of the lower clamp (3) engages with the arm engaging portion (3d) of the lower clamp (3), and the connection of the upper clamp (4) to the nozzle holder (9) fastens the locking member (5). A nozzle unit for a jet tube configured to be performed as a tool.   The nozzle holder (9) has a vertical hole (3b) for receiving the arm (5b) and a lateral hole (3c) for external release connected to the inner end of the vertical hole, and a hole edge of the horizontal hole (3c) is the arm. It is comprised as an engaging part (3d), The nail | claw (5c) at the front-end | tip of the arm (5b) of the said lock member is comprised to the arm engaging part (3d), It is for the jet tube of Claim 1 comprised. Nozzle unit.   The lower clamp (3) has a plug portion (3f) provided with the tube receiving groove (3a), and the upper clamp (4) has a cap shape that fits on the outer periphery of the plug portion (3f), and And an inner center portion having a shape including a tube retainer (4e) inserted into a tube receiving groove (3a) at the center of the plug portion (3f), and the plug portion (3f) of the lower clamp is connected to the lock The arm (5b) of the member has a parallel-arranged engaging groove (3g) inserted from the side, and the upper clamp (4) has an arm insertion hole (4d) corresponding to the engaging groove (3g). ) And the tube receiving groove (4a) on the peripheral wall, and the groove surface on the distal end side of the plug portion of the engaging groove (3g) is configured as the arm engaging portion (3d), and the locking member is formed on the groove surface. Claim that the middle part of the arm (5b) is engaged Item 2. A nozzle unit for a jet tube according to Item 1.   The upper clamp (4) has a bridge receiving groove (4c) into which the bridge portion (5a) of the lock member (5) is inserted, and an arm insertion hole (4d) in which the arm (5b) of the lock member is accommodated. Item 3. A nozzle unit for a jet tube according to Item 2.   The nozzle unit for a jet tube according to any one of claims 1 to 4, wherein a chamfer surface (5d) is provided at a corner of the front end side or rear end side of the arm (5b) at the front end of the claw (5c). .

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