JP2010011879A - Nozzle attachment structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent contamination of liquid to be injected and facilitate cleaning of the inside of a pipe. <P>SOLUTION: A nozzle 6 for injecting liquid is attached to an attachment hole 11 opened in a pipe 1. The pipe has a flat seat surface 12 around the attachment hole 11. The nozzle 6 consists of a flange 61b abutting on the seat surface 12 of the pipe 1 from the inside of the pipe 1, a screw portion 61c connected to the flange 61b and projecting outward from the attachment hole 11 of the pipe 1, an engagement portion 61d provided at the end of the screw portion 61c for being engaged with a tool or the like, and a nut 62 screwed with the screw portion 61c from the outside of the pipe 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to a technical field related to a nozzle mounting structure for mounting a nozzle for injecting liquid onto a pipe.

  Recently, a dishwasher is equipped with a cleaning method in which a large number of relatively small cleaning nozzles are attached at regular intervals in the axial direction of a pipe and a large amount of cleaning liquid is simultaneously sprayed from various directions to the tableware. It has become to. For this reason, it is necessary to develop a technology that can easily and reliably attach the cleaning nozzle to the pipe.

Conventionally, for example, the following techniques are known as techniques directed to easily and surely attaching a cleaning nozzle to a pipe.
Japanese Utility Model Publication No. 6-34779

  Patent Document 1 describes a nozzle mounting structure in which a cleaning nozzle is screwed into a mounting hole drilled in a pipe.

  In the nozzle mounting structure according to Patent Document 1, the cleaning nozzle is inserted into the mounting hole drilled in the pipe and rotated, and the threaded portion engraved on the outer peripheral surface of the cleaning nozzle is bitten into the mounting hole drilled in the pipe. As a result, the cleaning nozzle can be easily and securely attached to the pipe.

  In the nozzle mounting structure according to Patent Document 1, since the threaded portion of the cleaning nozzle must penetrate into the pipe to some extent, a concavo-convex structure in which foreign matter is likely to adhere to the inside of the pipe is formed, and the cleaning liquid to be sprayed is contaminated. There is a problem that it becomes easy. Further, when the inside of the pipe is cleaned, the uneven structure becomes an obstacle to the spraying and brushing of the cleaning liquid, which makes it difficult to clean the inside of the pipe.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a nozzle mounting structure in which the liquid to be ejected is prevented from being polluted and the inside of the pipe is easily cleaned.

  In order to solve the above-described problems, the nozzle mounting structure according to the present invention employs means described in each of the claims.

  That is, in the present invention, in a nozzle mounting structure in which a nozzle for injecting liquid is mounted in a mounting hole drilled in a pipe, the pipe is provided with a flat seat surface around the mounting hole, and the nozzle is connected to the pipe seat surface. A flange that is in contact with the inside of the screw, a threaded portion that continues to the flange and protrudes from the mounting hole of the pipe to the outside, and an engaging portion and a threaded portion that are provided at the tip of the threaded portion to engage a tool or the like It consists of a nut screwed from the outside of the pipe.

  In this means, the flange of the nozzle is brought into contact with a seating surface provided on the pipe, and a nut is screwed into the screw portion of the nozzle, so that only the flange of the nozzle is positioned inside the pipe as a retaining member.

  In the present invention, a sealing material is interposed between the seating surface of the pipe and the flange of the nozzle.

  In this means, the sealing property between the pipe and the nozzle is enhanced by the sealing material interposed between the seat surface of the pipe and the flange of the nozzle.

  That is, in the present invention, the engaging portion of the nozzle is characterized in that two parallel surfaces on which the tool or the like is engaged with each other are formed on the outer peripheral surface.

  With this means, two parallel surfaces with which the tool or the like is engaged with each other are formed on the engaging portion of the nozzle, so that the tool or the like can be reliably engaged so as to sandwich the engaging portion of the nozzle. Can do.

  In the nozzle mounting structure according to the present invention, the flange of the nozzle is brought into contact with the seating surface provided on the pipe, and the nut is screwed into the screw portion of the nozzle, so that only the flange of the nozzle is retained inside the pipe. Therefore, it is possible to avoid the formation of a concavo-convex structure in which foreign matter is liable to adhere to the inside of the pipe, so that the sprayed liquid can be prevented from being polluted and the inside of the pipe can be easily cleaned.

  The best mode for carrying out the nozzle mounting structure according to the present invention will be described below with reference to the drawings.

  In this form, the thing suitable for attachment of the washing nozzle of a dishwasher is shown.

  As shown in FIG. 1 and FIG. 2, this form is composed of each part of a pipe 1, a nozzle 6, and a sealing material 7.

  The pipe 1 is a straight pipe made of stainless steel or the like through which a cleaning liquid for cleaning dishes is distributed. The pipe 1 is provided with attachment holes 11 penetrating at regular intervals in the axial direction, and a flat seat surface 12 is provided around the attachment hole 11.

  The nozzle 6 includes a tip 61 and a nut 62. The tip 61 is provided with a tip 61-shaped cleaning liquid passage 61a, and at one end thereof, a flange 61b abutting on the seating surface 12 of the pipe 1 from the inside of the pipe 1 is provided, and is continuous with the flange 61b. Then, a threaded portion 61c that protrudes to the outside from the mounting hole 11 of the pipe 1 is provided, and an engaging portion 61d that engages a tool or the like is provided at the tip of the threaded portion 61c that is the other end. The passage 61a penetrates from the flange 61b to the engaging portion 61d. The flange 61b is formed in a thin shape with a size that substantially matches the seating surface 12 of the pipe 1. The threaded portion 61c has an axial length that matches the sum of the axial length of the nut 62 and the thickness of the seating surface 12 of the pipe 1, and is not unnecessarily exposed. The engaging portion 61d has two parallel surfaces on the outer peripheral surface on which tools and the like are engaged with each other.

  The sealing material 7 is a thin waterproof sealing material, and is formed in a ring shape into which the screw portion 61c of the tip 61 of the nozzle 6 is inserted.

  As an attachment work of this form, as shown in FIG. 1 (A), the threaded portion 61c of the tip 61 of the nozzle 6 is inserted into the sealing material 7 and inserted into the mounting hole 11 of the pipe 1 from the inside of the pipe 1. become. As a result, as shown in FIG. 1B, the threaded portion 61 c of the tip 61 of the nozzle 6 protrudes from the mounting hole 11 of the pipe 1, and the flange 61 b of the tip 61 of the nozzle 6 passes through the sealing material 7. The seating surface 12 is contacted.

  Thereafter, as shown in FIG. 1C, a nut 62 is screwed into the threaded portion 61c of the tip 61 of the nozzle 6 from the engaging portion 61d side and tightened. As a result, the nozzle 6 is securely attached to the pipe 1 by tightening the flange 61 b of the tip 61 of the nozzle 6 and the nut 62.

  When tightening the nut 62 to the threaded portion 61c of the tip 61 of the nozzle 6, as shown in FIG. 1D, if the tool or the like is engaged with the engaging portion 61d, the tip 61 and the nut 62 are prevented from rotating together. As a result, reliable tightening can be achieved. In addition, since two parallel surfaces on which the tool or the like is engaged with each other are formed on the outer peripheral surface of the engaging portion 61d of the tip 61 of the nozzle 6, it is ensured that the tool or the like is sandwiched between the engaging portions 61d. Can be engaged.

  According to this form, it is realized by a structure of a slight processing called a seating surface in the pipe 1 and a division of the nozzle 6 into a tip 61 and a nut 62, so that the structure is not complicated and the manufacturing process is not troublesome. Therefore, it can be manufactured inexpensively and easily. Further, since the attachment work is based on screw tightening, the attachment work does not become troublesome.

  In a state where the nozzle 6 is attached to the pipe 1, only the flange 61 b of the tip 61 of the nozzle 6 is positioned as a retaining inside the pipe 1, and a concavo-convex structure in which foreign matter is likely to adhere to the inside of the pipe 1 is formed. Can be avoided. Therefore, contamination of the injected liquid is prevented and the inside of the pipe 1 is easily cleaned.

  Furthermore, in this embodiment, the following configuration is provided at the terminal portion of the pipe 1.

  That is, as shown in FIGS. 3 to 5, each part of the mounting plate 2, the support member 3, the check valve 4, and the check valve operating mechanism 5 is provided at the end of the pipe 1.

  In the mounting plate 2, a through hole 22 is drilled in the center of a drum-shaped mounting plate main body 21 composed of a fan-shaped portion and a rectangular portion. The mounting plate main body 21 is formed to be slightly larger than the diameter of the pipe 1 and is fixed in contact with the end face of the pipe 1 so as to close only a part of the open end of the pipe 1. The center of the through hole 22 is located at the axial center of the pipe 1.

  The support member 3 has a circular window 32 opened on the surface of the support frame 31 facing the end of the pipe 1 of the U-shaped support frame 31, and a through-hole 34 formed in a tongue-shaped support piece 33 projecting in the radial direction of the window 32. Is perforated. In the support frame 31, a large number of windows 32, support pieces 33, and through holes 34 are arranged in parallel at appropriate intervals. The window 32 is formed to have a diameter slightly larger than the diameter of the pipe 1 and slightly smaller than the mounting plate body 21 of the mounting plate 2. The support piece 33 protrudes slightly beyond the center of the window 32. The through hole 34 has the same diameter as the through hole 22 of the mounting plate 2, and the center is positioned at the center of the window 32.

  The check valve 4 includes an annular valve seat 41 projecting radially in the vicinity of the end of the pipe 1 and a ball accommodated in a free state behind the valve seat 41 inside the pipe 1. And a valve body 42 having a shape. The valve seat 41 is formed by drawing the pipe 1 into an annular U-shaped section. The valve body 42 is made of an elastic material such as a rubber material that is in watertight contact with the valve seat 41. As shown in FIG. 8, since the nozzle 6 hardly protrudes inside the pipe 1, the valve element 42 can be accommodated inside the pipe 1 without any trouble.

  In the check valve operating mechanism 5, a rod 52 to which a head 51 is attached is inserted into a sleeve bolt 55 to which a nut 53 and a washer 54 are screwed, and the position of the rod 52 is selectively set by two restriction grooves 56 and 57. It has come to be decided. The head 51 is formed in a nut body that is formed in a round head shape that does not damage the valve body 42 of the check valve 4 that contacts the head 51 and is screwed to the tip of the rod 52. The rod 52 includes a screw portion 52a to which the head 51 is screwed, a slide portion 52b that linearly extends from a tip portion provided with the screw portion 52a and slides inside the sleeve bolt 55, and a rear end of the slide portion 52b. And an operation portion 52c that is bent and extended at approximately 90 degrees. The nut 53 is screwed into a threaded portion 55c described later of the sleeve bolt 55. The washer 54 is fitted into a later-described threaded portion 55 c of the sleeve bolt 53 and receives tightening of the nut 53. The sleeve bolt 55 includes a sleeve 55a that passes through the shaft center and is inserted through the slide portion 52b of the rod 52, and a head 55b that is formed larger than the through hole 22 of the mounting plate 2 and the through hole 34 of the support member 3. The screw portion 55c is formed with an outer diameter smaller than the diameter of the through hole 22 of the mounting plate 2 and the through hole 34 of the support member 3. The regulation grooves 56 and 57 are formed in a semi-long hole shape and a long hole shape in which the operation portion 52c of the rod 52 is engaged with a surface orthogonal to the surface of the support frame 31 where the window 32 of the support member 3 is opened. 1 are aligned in the direction of the axial direction.

  In the configuration of the end portion of the pipe 1, the sleeve 55 c of the sleeve bolt 55 of the check valve operating mechanism 5 is inserted into the through hole 22 of the mounting plate 2 and the through hole 34 of the support member 3, and the sleeve By fitting and screwing the nut 53 and the washer 54 to the threaded portion 55c of the bolt 55, the pipe 1 can be connected and attached to the support member 3 via the mounting plate 2. As a result, a dedicated separate connecting member for connecting the mounting plate 2 and the supporting member 3 becomes unnecessary, so that the number of members is reduced, the structure is simplified, and the manufacturing cost is reduced.

  The open end of the pipe 1 supported and arranged by the support member 3 is partially closed by the mounting plate 2 but is connected to the window 32 of the support member 3 and further to the outside. Will be.

  For the rod 52 of the check valve operating mechanism 5 inserted through the sleeve bolt 55 connecting the mounting plate 2 and the support member 3, a semi-long hole-shaped regulating groove 56 on the side where the operating portion 52 c is away from the pipe 1. When the head 51 is engaged (see FIG. 4A), the head 51 is retracted so as not to come into contact with the valve body 42 of the check valve 4, and the operating portion 52c is a long hole on the side close to the pipe 1. When the head 51 is engaged with the restriction groove 57 (see FIG. 4B), the head 51 is advanced so as to push the valve body 42 of the check valve 4 away from the valve seat 41. Engagement and disengagement between the operating portion 52c of the rod 52 and the restriction grooves 56 and 57 can be easily performed by rotating and sliding the rod 52 (see FIG. 5).

  According to this configuration, when the dishwasher is operated, the rod 52 of the check valve operating mechanism 5 is moved backward as shown in FIG.

  When the cleaning liquid is supplied to the nozzle 6 by the operation of the dishwasher, the valve body 42 of the check valve 4 is pressed against the valve seat 41 by the water pressure of the cleaning liquid flowing through the pipe 1. As a result, the check valve 4 is closed and leakage of the cleaning liquid from the end of the pipe 1 is prevented.

  To clean the inside of the pipe 1, the rod 52 of the check valve operating mechanism 5 is advanced as shown in FIG.

  The advancement of the rod 52 of the check valve operating mechanism 5 causes the valve body 42 of the check valve 4 to be separated from the valve seat 41. As a result, the check valve 4 is opened and a gap S is formed between the valve seats 41 of the valve body 42. Accordingly, as shown in FIG. 6, the cleaning liquid W that has been cleaned and soiled inside the pipe 1 is ejected from the end of the pipe 1 by spraying the cleaning liquid W by using the flow path of the cleaning liquid for dish washing. It can be further discharged to the outside through the window 32 of the support member 3.

  After the inside of the pipe 1 is cleaned, the rod 52 of the check valve operating mechanism 5 is returned (retracted) as shown in FIG.

  That is, when cleaning the inside of the pipe 1, disassembly, assembling work and accompanying work for supporting the pipe 1 and the like can be made unnecessary. Therefore, the cleaning work inside the pipe 1 can be easily facilitated.

  Further, when cleaning the inside of the pipe 1, as shown in FIG. 7, the cleaning liquid W can be jetted from the outside to the end of the pipe 1 through the window 32 of the support member 3.

  When the cleaning liquid W is jetted from the reverse direction, the inner wall of the pipe 1 can be wiped by rotating and rolling the valve element 42 of the check valve 4 with the water pressure of the cleaning liquid W. As a result, the cleaning effect inside the pipe 1 can be enhanced. As shown in FIG. 8, since the nozzle 6 hardly protrudes inside the pipe 1, the valve element 42 is smoothly rotated and rolled inside the pipe 1.

  Even if the cleaning liquid W is sprayed from any direction, a brush may be inserted from the outside into the end of the pipe 1 through the window 32 of the support member 3 to brush around the check valve 4. it can. As a result, it is possible to clean the periphery of the check valve 4 to which dirt or the like easily adheres.

  As described above, the sealing material 7 can be interposed between the pipe 1 and the nut of the nozzle 6 in addition to the illustrated embodiment.

  Further, the check valve 4 may be structured such that the plate-shaped valve body 42 is opened and closed. In addition, the structure of the check valve operating mechanism 5 can be changed in accordance with the change in the structure of the check valve 4.

Furthermore, it is possible to perform cleaning by alternately spraying the cleaning liquid W from the opposite direction.
Is possible.

The nozzle mounting structure according to the present invention can be implemented in a wide range of fields for ejecting liquids for food production, painting, etc. in addition to dish washing.
It becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the best form for implementing the nozzle attachment structure which concerns on this invention, and the process order of attachment work is shown by (A)-(D). FIG. 2 is a partially cut and exploded perspective view of FIG. 1. It is a disassembled perspective view of the structure added to the best form for implementing the nozzle attachment structure which concerns on this invention. It is sectional drawing of the assembly | attachment state of FIG. 3, (A) and (B) show a different operation state. FIG. 5 is a side view of FIG. 4. It is a figure which shows the example of cleaning in the state of FIG. 4 (B), and one part is cut | disconnected along the XX line of FIG. It is a figure which shows the example of cleaning different from FIG. It is side surface sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe 2 Mounting plate 3 Support member 32 Window 4 Check valve 41 Valve seat 42 Valve body 5 Check valve operating mechanism 6 Nozzle 61 Tip 61b Flange 61c Screw part 61d Engagement part 62 Nut 7 Sealing material W Cleaning liquid

Claims (3)

  In a nozzle mounting structure in which a nozzle for injecting liquid is mounted in a mounting hole drilled in a pipe, the pipe is provided with a flat seat surface around the mounting hole, and the nozzle is brought into contact with the seat surface of the pipe from the inside of the pipe. A threaded portion that is continuous with the flange and projecting from the mounting hole of the pipe to the outside, and a threaded portion that is provided at the tip of the threaded portion and that engages with a tool etc. from the outside of the pipe A nozzle mounting structure characterized by comprising a nut.   2. The nozzle mounting structure according to claim 1, wherein a sealing material is interposed between the seating surface of the pipe and the flange of the nozzle.   3. The nozzle mounting structure according to claim 1, wherein the engaging portion of the nozzle is formed with two parallel surfaces on the outer peripheral surface to which a tool or the like is engaged with each other.

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