JPH025882Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is mainly used to cover school lunch cans, etc., which are transported to the washing room by the conveyor of a dishwasher and have dirt strongly adhered to their inner surfaces. The present invention relates to a cleaning liquid spray nozzle device that repeatedly and intensively sprays cleaning liquid onto an object to be cleaned.

``Problems that conventional technology and ideas cannot solve'' Generally, in dishwashers that wash dishes while conveying them on a conveyor, shower nozzles are installed above and below the conveyor to spray cleaning liquid to clean the dishes. However, when cleaning school lunch cans that are heavily caked with food particles, shower nozzles that spray cleaning liquid disperse the pressure of the cleaning liquid, so the jetting force is weak and it is difficult to completely clean. is difficult to do.

Therefore, conventionally, a nozzle header that swings at a predetermined angle in a direction perpendicular to the conveyance direction of the conveyor is provided at the tip of the cleaning liquid feeding pipe, a direct injection nozzle that sprays the cleaning liquid in a concentrated manner is installed in this nozzle header, and this nozzle header is oscillated. By spraying the cleaning liquid from the nozzle and concentratedly spraying it at high pressure in a dense zigzag pattern on the inner surface of containers such as food cans that are being transported by the conveyor, it can reliably remove even strongly adhered dirt. A cleaning nozzle device designed to clean the area is also disclosed in the Utility Model Publication No. 1983, filed by the present applicant.
- Known as No. 40144.

However, in the conventional cleaning nozzle device described above, in order to swing and rotate the nozzle header, it is necessary to provide a drive mechanism consisting of a rack that moves forward and backward using a solenoid and a pinion that meshes with the rack, which is mechanically complicated. Because the drive mechanism was subject to severe wear and tear, problems such as failure of the drive mechanism caused the washing machine to become unusable, and maintenance of the drive mechanism had to be performed frequently.

Furthermore, conventionally, a fountain nozzle is provided in a horizontally rotatable swivel pipe in an upward diagonal direction, and by spraying the cleaning liquid under pressure into the swivel pipe from the fountain nozzle, the swivel pipe is swiveled by the spraying force.
A cleaning water injection device for a cleaning machine that cleans an object placed above the rotation range by spraying cleaning liquid from a fountain nozzle that rotates along with this has also been filed by the same applicant as the present applicant. Mikiakiaki related to
Known as No. 56-44862.

However, in the above-mentioned conventional cleaning water injection device, the cleaning liquid is sprayed upward along a circular trajectory by the fountain nozzle that rotates together with the rotating pipe, so that the cleaning liquid is sprayed upwardly on the object to be cleaned that is transported linearly by the conveyor. However, if a large number of nozzles were not installed, there would be a dead point where the cleaning liquid would not be sprayed, resulting in a complicated mechanism.

Conventionally, in a cleaning device for a tank or the like, an angle-shaped cleaning head that rotates around its vertical axis is provided at the tip of a water pipe, and a slot-shaped opening is provided in the horizontal part of the cleaning head in the circumferential direction. A nozzle holder is rotatably mounted around the nozzle holder, two nozzles are provided on the outer periphery of the nozzle holder almost symmetrically in the diametrical direction, and the cleaning head is mechanically driven by a rotary drive mechanism. The nozzle holder is connected for intermittent rotation via a worm gear mechanism and an intermittent rotation mechanism (equipped with a rotation promotion and rotation prevention mechanism) connected thereto, and the nozzle holder is rotated around a vertical axis together with the cleaning head. However, in conjunction with this rotation, the nozzle is rotated intermittently around the horizontal axis, and the cleaning liquid is sprayed in a predetermined range in the vertical and horizontal directions from the nozzle, whose inlet opening faces the inner slot opening of the two nozzles. A cleaning nozzle device is also known from Japanese Patent Application Laid-Open No. 49-49466.

However, in the conventional cleaning nozzle device described above, the nozzle holder is rotated horizontally and intermittently vertically by a drive mechanism using a prime mover such as a motor and a complicated intermittent rotation mechanism linked to this, so the mechanical drive mechanism described above is As in the case of the washing machine, it is mechanically extremely complex, and the drive mechanism is subject to severe wear and tear, resulting in problems such as the washing machine becoming unusable due to its failure and the need for frequent maintenance.

Furthermore, since the slot-shaped opening is provided in the horizontal part of the cleaning head, which is the rotating shaft of the nozzle holder, in the circumferential direction, it is not easy to process the cleaning head. The strength of the horizontal part is weak, and there are problems with durability.
Moreover, the mechanism of the rotating bearing part of the rotating retainer is complicated.
There were also problems such as that the processing was not easy.

"Means for Solving the Problems" This invention solves the above-mentioned conventional problems, and its technical means is that short tubular bushes 17, 28 are provided at the front and rear ends, and these bushes 17, 28
A press-fit liquid supply chamber 19 having a circular cross section is provided in the space between the press-fit liquid supply chamber 19 and the one bush 17.
A nozzle header 18 is screwed into the front end of the nozzle header 18 and is removably attached to the nozzle header 18.The nozzle header 18 is screwed into the front end of the nozzle header 18, and a nozzle attachment hole OP is provided to communicate the press-fit liquid supply chamber 19 of the nozzle header 18 with the outside. The protrusion angle α when viewed from the front side of the nozzle header 18 is such that the nozzle axis makes an angle of 180° or less with respect to the straight line connecting the center of its base end opening and the circular center of the press-fit liquid feeding chamber 19. At least two or more injection nozzles 24 or 25 set, and the nozzle header 18
It is an arcuate body that is fitted into the press-fit liquid supply chamber 19 and has an outer diameter approximately equal to the radius of the press-fit liquid supply chamber 19 and a front-rear width that is approximately equal to the front-rear width of the press-fit liquid supply chamber. An arc wall 2 having an inner circumferential surface having the same radius as the inner circumferential surface of this arc body is installed before and after the terminal surfaces of the arc.
1 and 22 are arranged opposite each other so as to maintain an open space 20 between them, and the inner periphery of the arcuate walls 21 and 22 and the inner periphery of the aperture adjuster 23 form a series to form a circular opening 35. an aperture adjuster 23 consisting of an aperture adjuster 23, a liquid feeding pipe 16 whose tips are fitted and fixed into the front and rear circular openings 35 of the aperture adjuster 23 through the bushes 17 and 28 of the nozzle header 18, and an opposing pipe whose rear end is closed. This paper proposes a cleaning liquid spray nozzle device consisting of the following.

"Operation" The cleaning liquid flows into the opening regulator 23 from the liquid feeding pipe 16, passes through the open space 20, and reaches the nozzle header 1.
The liquid is introduced into the press-fitting liquid feeding chamber 19 of No.8.

At this time, a part of the space in the press-fit liquid feeding chamber 19 is closed by the opening adjuster 23, but the open space 2
The cleaning liquid flows into the injection nozzles 24 and 25 whose proximal end openings communicate with the unobstructed space of the press-in liquid supply chamber 19 which is opened at 0 and is injected.

A rotational moment is applied to the nozzle header 18 by the spraying force of the cleaning liquid from the injection nozzles 24 and 25, and the nozzle header 18 automatically rotates around the axis of the liquid sending pipe 16, and the opening regulator 23 prevents the cleaning liquid from flowing into the nozzle header 18. When it rotates to the position where the injection is stopped, it rotates with the injection stopped, but just before this
25 rotates into the unobstructed space of the press-fitting liquid feeding chamber 19, sequentially and continuously injects the cleaning liquid, and continuously applies rotational moment to the nozzle header 18.

Therefore, each of the injection nozzles 24 and 25 continuously injects the cleaning liquid one after another while rotating within the space of the press-in liquid supply chamber 19 that is not blocked by the opening adjuster 23, thereby expanding the injection range. It is possible to intensively spray cleaning liquid at high pressure onto the transported object 3 without creating a dead point where the spray does not hit, and to reliably wash even strongly adhered dirt.

``Example'' Figures 5 and 6 show an automatic washing machine for cleaning objects to be cleaned, such as containers such as school lunch cans, using the cleaning liquid injection nozzle device of this invention. In the machine box 2 installed in The conveyor C is circularly driven by a power transmission mechanism in which a roller chain 9 is wound around a sprocket 7 provided on the drive shaft 6 of the wheel 5 and a sprocket 8 driven by a motor provided on the lower side of the machine box 2. It is composed of

A covering frame 10 is installed on the top of the machine box 2, and a cleaning chamber W for the object to be cleaned 3 is configured between the covering frame 10 and the inside of the machine box 2. The cleaning liquid is directed downward into the top of the cleaning chamber W. An injection nozzle 11 for injection is installed, and the lower part of the liquid feeding pipe 12 of this injection nozzle 11 is connected to the discharge side of the liquid feeding pump 13 installed at the lower part of the machine box 2.
The suction side of the liquid pump 13 is open and connected to the cleaning liquid tank 1 via a filter.

At the top and bottom of the cleaning chamber W near the delivery side B of the object 3 to be cleaned, there are finishing cleaning nozzles 14, 1 that spray finishing cleaning liquid such as hot water or steam upward and downward toward the object 3 to be cleaned.
5 is installed.

Then, on the lower side of the conveyor C, a cleaning liquid is sprayed toward the inner surface of the object 3 to be cleaned, such as a food can, which is conveyed with the open part facing downward, and the spray direction is set relative to the conveyance direction of the conveyor C. An injection nozzle device N is installed that performs concentrated injection while gradually shifting over a predetermined range in the transverse direction.

As shown in FIGS. 1 and 2, the injection nozzle device N includes a nozzle header 18 and a nozzle header 18 rotatably around the axis of a cleaning liquid sending pipe 16 installed substantially horizontally along the conveyance direction of the conveyor C. It is composed of an aperture adjuster 23 installed inside.

The nozzle header 18 is provided with short tubular bushes 17 and 28 at its front and rear ends.
A press-in liquid supply chamber 19 with a circular cross section is provided inside between 7 and 28, and two or more injection nozzles 24 and 25 are protruded from the outer periphery at equal intervals in the circumferential direction. .

One bushing 17 is screwed into the front end of the press-fit liquid feeding chamber 19 and detachably attached to the nozzle header 18 body.

The injection nozzles 24 and 25 are installed by inserting their base ends into the nozzle mounting holes OP provided in the nozzle header 18 so that the press-fitted liquid supply chamber 19 communicates with the outside. α (see Fig. 1) is set so that the axes of the injection nozzles 24 and 25 form an intersecting angle of 180° or less with the straight line connecting the center of the base end opening and the circular center of the press-fit liquid feeding chamber 19. In addition, the injection nozzles 24 and 25 adjacent to each other in the front-rear direction of the nozzle header 18 are provided so as to protrude toward their distal ends so as to form a V-shape.

As shown in FIGS. 1, 2, 3, and 7, the opening adjuster 23 has an outer diameter that is approximately equal to the radius of the press-fitting liquid feeding chamber 19 of the nozzle header 18, and a front-to-back width that is approximately equal to the front-to-back width of the press-fitting liquid feeding chamber. It is an arcuate body formed in a circular arc shape, and an arcuate wall 2 having an inner circumferential surface having the same radius as the inner circumferential surface of this arcuate body is located before and after the terminal surfaces 33 and 34 of the arcuate body.
1 and 22 are arranged opposite each other so as to maintain an open space 20 between them, and the inner periphery of the arcuate walls 21 and 22 and the inner periphery of the arcuate body of the aperture adjuster 23 form a series to form a circular opening 35. It is formed.

The opening adjuster 23 is inserted into the press-fit liquid feeding chamber 19 of the nozzle header 18, and the front and rear circular openings 3
5 and 36, the ends of the liquid sending pipe 16 and an opposing pipe 27 having the same diameter and having a closed rear end are tightly fitted and fixed.

The nozzle header 18 is installed rotatably around the axis of the liquid sending pipe 16 by fitting its bushes 17 and 28 to the outer peripheries of the liquid sending pipe 16 and the opposing pipe 27, and is inserted and fitted into the press-fit liquid sending chamber. The inner surface is locked by the opening adjuster 23 and the arcuate walls 21 and 22 to restrict movement in the front and back direction.

The liquid sending pipe 16 is provided with an indicator 26 that indicates the opening range of the opening adjuster 23 in the nozzle header 18 .

The liquid sending pipe 16 is connected to a support device 2 provided on the machine box 2.
9, and its rear part is connected to an elbow 31 via a union joint 30, for example, and a pressure feed liquid supply pipe 32 is connected to this elbow 31, and this pressure feed liquid supply pipe 32 is connected to the liquid feed pipe 12. By doing so, the cleaning liquid in the cleaning liquid tank 1 can be introduced.

In the above configuration, when assembling the nozzle device, the circular openings 35, 35 before and after the opening adjuster 23 are
The ends of the liquid sending pipe 16 and the opposing pipe 27 are tightly fitted and fixed, and the nozzle header 18 with the bushing 17 removed is fitted and moved to the outer periphery of the opposing pipe 27, and the opening adjuster 23 is moved. Press-fit liquid supply chamber 19
The bush 17, which is fitted onto the outer periphery of the liquid sending pipe 16, is screwed into the nozzle header 18 and integrated.

In this case, the opening adjuster 23 is installed with its open space 20 facing the conveyor C of the washing machine.

Although the illustrated embodiment shows the case where one nozzle device is installed, in addition to this, it is also possible to cut the liquid feeding pipe 16 at an appropriate location and install a plurality of similar nozzle devices in series. .

Next, when the automatic washing machine shown in FIGS. 5 and 6 is used to wash the object 3 to be cleaned, which is a container such as a school lunch can, with the injection nozzle device N having the above configuration, the object 3 to be cleaned, which is a container such as a school lunch can, is moved by the conveyor C. While transporting object 3,
The cleaning liquid in the cleaning liquid tank 1 is force-fed to a liquid-feeding pipe 16 by a liquid-feeding pipe 13.

The cleaning liquid flows from the liquid supply pipe 16 into the opening regulator 23 and passes through the open space 20 to the nozzle header 1.
The liquid is introduced into the press-fitting liquid feeding chamber 19 of 8.

At this time, a part (half in the figure) of the press-fit liquid supply chamber 19 is closed by the opening adjuster 23, but the unblocked press-fit liquid supply chamber 19 opened in the open space 20 is closed. The cleaning liquid flows into the injection nozzles 24 and 25 whose proximal openings communicate with the space and is ejected.

A rotational moment is applied to the nozzle header 18 by the spraying force of the cleaning liquid from the injection nozzles 24 and 25, and the nozzle header 18 automatically rotates in the direction of the arrow in FIG. When the injection nozzles 24 and 25 are rotated to the position shown in FIG. and continuously exerts a rotational moment on the nozzle header 18.

Therefore, each of the injection nozzles 24 and 25 injects the cleaning liquid one after another while rotating within the space of the press-in liquid supply chamber 19 that is not blocked by the opening adjuster 23, and the cleaning liquid is conveyed through the injection range. Item to be cleaned 3
The cleaning liquid can be sprayed intensively at high pressure without creating a dead point where the spray does not hit the target, and even strongly adhered dirt can be reliably washed.

Since the cleaning liquid is sprayed from the spray nozzles 24 and 25 in the range where the spray hits the object 3 to be cleaned, and the spray is stopped in the range where the spray does not hit the object 3 to be cleaned, there is no wastage of the cleaning liquid.

The range that the spray hits the object 3 to be cleaned depends on the size of the object 3, but in order to change and adjust the spray range, it is necessary to adjust the arc angle of the aperture adjuster 23 (see Figure 1). In this case, it is possible to easily adjust the angle by changing the size of the angle (180°).

In this case, the injection nozzles 24, 25 at a certain position
Just before the opening adjuster 23 rotates to the position where the inflow of cleaning liquid is blocked, the following one
The openings at the base ends of the injection nozzles 24 and 25 are open to the open space 20 and are not blocked.
Needless to say, it is necessary to set the mounting position and number of the injection nozzles 24, 25 with respect to the nozzle header 18 so that they communicate with the space of the nozzle header 18.

In addition, the injection nozzle 2 to the nozzle header 18
4 and 25, from the relationship of the rotational moment due to the injection force, the maximum rotational moment will be applied when it is tangential to the circle centered on the rotation center of the nozzle header 18.
In practice, the mounting angle may be selected in accordance with design specifications such as the number of injection nozzles, the injection range, or the intended rotational speed.

"Effect of the invention" As described above, according to this invention, the aperture adjuster 23
Each of the injection nozzles 24 and 25 injects cleaning liquid within the space of the press-in liquid supply chamber 19 that communicates with the open space 20 of 18 is automatically rotated around the axis of the liquid sending pipe, the cleaning liquid is sequentially sprayed in a certain range, and a dead point where the spray does not hit the object to be cleaned 3 being conveyed within the spray range is created. The cleaning liquid is sprayed at high pressure in a concentrated manner, making it possible to reliably clean even strongly adhered dirt.

Since the cleaning liquid is sprayed from the spray nozzles 24 and 25 in the range where the spray hits the object 3 to be cleaned, and the spray is stopped in the range where the spray does not hit the object 3 to be cleaned, there is no wastage of the cleaning liquid.

The range of the spray onto the object 3 to be cleaned can be easily changed and adjusted by using an aperture adjuster 23 formed by changing the arc angle of the aperture adjuster 23.

Further, the nozzle device has the ends of the liquid feeding pipe 16 and the opposed pipe 27 tightly arranged and fixed in the circular openings 35, 35 at the front and rear of the opening adjuster 23, and the nozzle header 18 with the bush 17 removed. The aperture adjuster 2 is moved to fit onto the outer periphery of the opposing pipe 27.
3 into the press-fitted liquid feeding chamber 19, and the liquid feeding pipe 16
The bush 17 fitted on the outer periphery of the nozzle header 1
Since it can be assembled by screwing into the nozzle header 8 and integrating it, there is no need to make any incisions such as slot openings in the liquid sending pipe, and there is no need to provide a complicated bearing mechanism for the nozzle header, making it simple. With this configuration, the nozzle header 18 can be assembled rotatably, and it is mechanically simple and easy to process, assemble and disassemble.
It is also possible to easily install multiple units.

Furthermore, since no mechanical drive means is used to rotate the nozzle, there are few breakdowns and almost no maintenance is required, making it economical.

[Brief explanation of the drawing]

The figures show this embodiment; FIG. 1 is a vertical sectional front view of the injection nozzle device of this invention, FIG. 2 is a vertical sectional side view of the same, and FIG. 3 is a perspective view of the aperture adjuster according to this invention. , Fig. 4 is a perspective view of the injection nozzle device of this invention, Fig. 5 is a vertical sectional front view of an automatic washing machine implementing this invention, Fig. 6 is a vertical sectional side view of the same, and Fig. 7 is a perspective view of the automatic washing machine implementing this invention. FIG. 3 is a longitudinal side view of such an aperture adjuster. 3...Object to be cleaned, 16...Liquid sending pipe, 17...
... Bush, 18 ... Nozzle header, 19 ... Pressure-in liquid feeding chamber, 20 ... Open space, 21, 22 ... Arc wall, 23 ... Opening regulator, 24, 25 ... Injection nozzle, 27 ... Opposite installation Pipe, 28... Bush, 33, 34... Arc terminal surface, 35... Circular opening, OP... Nozzle mounting hole, α... Nozzle angle.

Claims (1)

[Scope of utility model registration request] Short tubular bushes 17 and 28 are provided at the front and rear ends, and a press-fit liquid supply chamber 19 with a circular cross section is provided inside the bushes 17 and 28. Nozzle header 18 that is screwed into and removably attached to the
The protrusion angle α when viewed from the front side of the nozzle header 18 is: At least two or more injection nozzles 24 or 2 whose nozzle axes are set at an angle of 180° or less with respect to a straight line connecting the center of the base end opening and the circular center of the press-fit liquid feeding chamber 19.
5, and is fitted into the press-fit liquid supply chamber 19 of the nozzle header 18, and is formed with an outer diameter of a radius approximately equal to the radius of this press-fit liquid supply chamber 19, and a front-rear width approximately equal to the front-to-back width of the press-fit liquid supply chamber. It is a circular arc body, and at the front and rear between the end faces of the circular arc body, circular arc walls 21 and 22 having inner circumferential surfaces having the same radius as the inner circumferential surface of the circular arc body are arranged so as to maintain an open space 20 between them. The aperture adjuster 23 is arranged oppositely and has a circular opening 35 formed by the inner periphery of the arc walls 21 and 22 and the inner periphery of the arc body, and the bushes 17 and 28 of the nozzle header 18 are passed through the aperture adjuster 23 and the bushes 17 and 28 of the nozzle header 18. A liquid feeding pipe 16 whose tips are fitted and fixed into the circular openings 35 at the front and rear of the opening adjuster 23, respectively, and an opposing pipe 27 whose rear end is closed.
A cleaning liquid spray nozzle device comprising: