JP2018176140A - Spin nozzle for water removal or dust removal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To elongate a product life, and to perform water removal or dust removal so that a shank 15 of a nozzle tube T does bot perform precession.SOLUTION: A nozzle tube T is integrated rotatably into a case C. The nozzle tube T comprises a linear shank 15, and a slewing part 16 in which a tilt angle is kept to an axis line of the shank 15. Further, the case C is provided with ball bearings B1, B2 for supporting rotatably the shank 15 of the nozzle tube T.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water removal or dust removal spin nozzle that blows off water or dust attached to a water removal or dust removal target with compressed air ejected from a nozzle tube.

  For example, in the case of a food container, the food may adhere to the outside of the container during the process of filling the food with it. Therefore, in most cases, after filling the food, rinse all containers with water. Then, the container washed with water may be dewatered and boxed, or after dewatering, the container may be further dried in a drying room and then boxed.

In the above process, if the container is put directly into the drying chamber by omitting the water removal operation, for example, large droplets of water can not be completely removed.
If the container is packed in a box with water droplets adhering to the container, the water droplets may, for example, exude to the outside of the cardboard box or cause mold or offensive odor.

The appearance of water on the outside of the cardboard box or mold on the outside of the container often has little effect on the food itself.
However, in the current food industry, such a thing is strictly unacceptable. Therefore, if the cardboard box is flooded with water or if the container has mold, it will be a factor for return.

For this reason, in the food container in particular, a highly accurate water removal function is required, and a water removal machine R shown in FIG. 2 has been conventionally known as this type.
The water removal machine R is provided with the conveyer 2 on the main body 1 and an air jet unit 3 capable of covering the conveyer 2 and opening the conveyer 2.

The air jet unit 3 is supplied with compressed air and provided with a plurality of spin nozzles N for jetting the compressed air.
Then, in the state where the conveyer 2 is covered by the air jet unit 3, for example, if the object to be removed water such as a food pouch is placed on the conveyer 2 and conveyed, the object to be drained is the air jet unit In the process of passing through 3, the compressed air jetted from the spin nozzle N is blown, and the water droplets adhering to the container are blown off and the water is removed.

The spin nozzle N used in the water removal machine R as described above is as shown in FIG.
The spin nozzle N comprises the case 4, the nozzle tube 5, the bearing 6 and the cover plate 7.

  The case 4 has a bottom 4a on one side and an opening 4b on the opposite side to the bottom 4a. Further, an introduction hole 8 for introducing compressed air is formed in the bottom portion 4a, and a mounting pipe 9 continuous to the introduction hole 8 is integrally provided. The mounting pipe 9 is fixed to the air jet unit 3 described above, and the compressed air in the air jet unit 3 is guided.

The nozzle tube 5 is incorporated in the case 4 as described above, and the nozzle tube 5 is formed of a straight shaft 5a and a pivot 5b having an inclination angle with respect to the axis of the shaft 5a. Become.
The spout 5c at the tip of the pivoting portion 5b maintains the position at which the pivoting portion 5b can pivot and the angle with respect to the shaft portion 5a by the reaction force of the compressed air ejected therefrom.

The inner ring 6a and the outer ring 6b of the bearing 6 formed of a ball bearing are press-fitted between the case 4 and the shaft portion 5a of the nozzle tube 5 as described above.
Therefore, the shaft 5 a of the nozzle tube 5 is supported by the ball bearing B and rotates.

Under the above configuration, when compressed air is supplied to the air jet unit 3, the compressed air is guided from the mounting pipe 9 to the nozzle tube 5, and is vigorously jetted from the jet port 5c.
While the said turning part 5b turns centering on the axis line of the axial part 5a by the ejection reaction force of the compression air at this time, the injection direction of compression air also turns.

On the other hand, the cover plate 7 is fixed to the shaft 5 a of the nozzle tube 5 so that water droplets and the like do not enter the case 4 from the opening 4 b.
Further, a small hole 10 is formed in the shaft portion 5a between the cover plate 7 and the bearing 6, and compressed air is blown out from the small hole 10 to positively prevent water droplets from entering the case 4 There is.

Japanese Patent Laid-Open No. 2000-042451

  In the spin nozzle N as described above, the shaft portion 5 a of the nozzle tube 5 is supported by one bearing 6. However, since the turning portion 5 b of the nozzle tube 5 is eccentrically rotated with respect to the shaft portion 5 a supported by the bearing 6, a biased load always acts on the bearing 6. Because of this uneven load, the bearing 6 also wears unevenly, which causes the shaft 5a to precess.

  As described above, when the shaft portion 5a performs precession movement, the turning radius of the turning portion 5b, in particular, the spout 5c thereof increases accordingly. If the turning radius becomes large, the hit point of the compressed air becomes inaccurate, and the impact force by the compressed air decreases.

  In addition, the turning torque of the turning portion 5b is very small. For example, even if a finger is inserted while turning, it is possible to stop the turning with almost no pain. Since there is only such a small turning torque, there is a problem that when the shaft 5a performs precession, smooth rotation is blocked and the rotation speed is further reduced, and the water removal efficiency per unit time is reduced. The

Furthermore, when the shaft 5a of the nozzle tube 5 starts precessing, the shaft 5a and the bearing 6 are partially worn away, and a gap is formed between them. When such uneven wear progresses, the nozzle tube 5 does not rotate.
And in the case of a water removal machine, although tap water is used in many cases, when tap water is used for a long time, chalk will precipitate and it will enter into the above-mentioned crevice. As described above, when the creaking gets into the gap, the nozzle tube 5 can not be smoothly rotated, and the life of the spin nozzle N is shortened.

  If the spin nozzle N does not rotate or its rotation does not go smoothly, the spin nozzle N must be removed from the water removal machine and replaced. However, since the water removal machine is mostly incorporated in the middle of the main line, it is necessary to stop all of the main line for replacement of the spin nozzle N, which significantly reduces the manufacturing efficiency in the main line. .

  An object of the present invention is to provide a spin nozzle for water removal or dust removal that can maintain a long life and that water droplets or dust do not remain on the water removal or dust removal target and does not lower the commercial value of those objects. is there.

A first invention is a spin nozzle for water removal or dust removal, characterized in that a shaft portion of the nozzle tube is supported by a pair of bearings double-layered in the axial direction.
Thus, since the shaft of the nozzle tube is rotatably supported by the pair of bearings, even if the force of the precession motion acts on the shaft, it can be held down. Since the action force of the precession movement acting on the shaft can be suppressed, the turning of the turning portion of the nozzle tube can be stabilized.

  Thus, the turning of the turning portion can be stabilized, so that the direction of the compressed air jetted from the nozzle tube can also be stabilized, and water droplets, dust and the like will not remain on the object of water removal or dust removal. Moreover, the life of the spin nozzle can be extended.

A second invention is characterized in that the bearing is a ball bearing.
By making the bearing a ball bearing, the rotation of the shaft of the nozzle tube becomes smoother.

In a third aspect of the invention, the case is provided with a bottom on one side and an opening on the other side. Then, a cover member for closing the opening is provided, and the cover member is provided with a lid for closing the opening and a skirt which is continuous with the lid and extends to the outer peripheral side of the case. The present invention is characterized in that all or a part of the outer circumference of the case is covered by the part.
Since the cover member is provided as described above, water droplets and dust do not enter the case. In particular, in the case of a water removal machine using tap water, it is possible to almost eliminate the problem caused by the calcite.

A fourth aspect of the present invention is characterized in that at least one small hole is formed in the shaft portion of the nozzle tube for injecting the compressed air introduced into the nozzle tube into the cover member.
Since the small holes are formed as described above, the inside of the covering member can be maintained at high pressure.

  According to the spin nozzle for water removal or dust removal of the present invention, since the axial portion of the nozzle tube does not precess, it is possible to always maintain stable turning. Therefore, the life can be kept long, and no water drop or dust remains on the object of water removal or dust removal, and the commercial value is not reduced.

It is a sectional view of the present invention. It is a perspective view of the conventional water removal machine. It is the figure which made a part of the spin nozzle used for the conventional water removal machine in the cross section.

  Case C of the illustrated embodiment has a bottom 11 on one side, and an opening 12 is formed on the side opposite to the bottom 11. The bottom 11 is formed with an introduction hole 13 for introducing compressed air from an air jet unit as in the prior art, and a mounting pipe 14 continuous to the introduction hole 13 is integrally provided. It fixes to the above-mentioned air ejection unit.

A nozzle tube T is incorporated in the case C, and the nozzle tube T is composed of a linear shaft portion 15 and a pivoting portion 16 maintaining an inclination angle with respect to the axis of the shaft portion 15.
And the jet nozzle 17 of the front-end | tip of the said turning part 16 is maintaining the position and angle which can turn the turning part 16 with the reaction force of the compressed air which ejects from there.

  The shaft portion 15 of the nozzle tube T is incorporated in the case C as described above, but the bearing of the present invention is formed between the shaft portion 15 and the case C in two stages in the axial direction of the shaft portion 15 A pair of ball bearings B1 and B2 are incorporated, and the built-in structure is as follows.

Note that since the pair of ball bearings B1 and B2 have the same configuration, their respective components will be described using the same reference numerals.
The ball bearings B1 and B2 are formed by interposing balls 20 between the inner ring 18 and the outer ring 19, and the balls 20 are held by a cage 21.

On the other hand, on the axial portion 15 of the nozzle tube T, a pair of snap rings 22 and 23 are fitted with a gap in the axial direction, and the inner ring 18 of the ball bearings B1 and B2 is interposed between the snap rings 22 and 23 I am holding it.
Further, the outer ring 19 at the lower side of the drawing is supported by a step 24 formed at the lower end of the drawing in the case C, and the upper end is stopped by a snap ring 26 which is stopped inside the case C via a spacer 25.
In the figure, reference numeral 27 denotes a pressing screw whose tip is in contact with the outer ring 19.

Furthermore, a pair of snap rings 28 and 29 are provided on the shaft portion 15 closer to the pivoting portion 16 than the snap ring 26, and the cover member 30 is interposed between the snap rings 28 and 29. A leaf spring 31 is interposed between the ring 28 and the cover member 30.
The covering member 30 as described above comprises a plate-like lid portion 30a and a skirt portion 30b continuous to the lid portion 30a. The cover 30a covers the opening 12 of the case C, and the skirt 30b extends to the outer periphery of the case C so as to cover the periphery thereof.

As described above, since the covering member 30 covers the opening 12 of the case C so as to cover it, water droplets and dust can be completely prevented from entering the case C.
Further, in this embodiment, a small hole 32 is formed between the retaining rings 26 and 28 in the shaft portion 15 of the nozzle tube T, and compressed air passing through the nozzle tube T is ejected from the small hole 32. There is.
As described above, since the compressed air is ejected from the small holes 32, the pressure in the internal space covered by the covering member 30 is increased. Therefore, water droplets and dust hardly enter the cover member 30.

According to the spin nozzle for water removal or dust removal of the above embodiment, since the shaft portion 15 of the nozzle tube T is supported by the pair of ball bearings B1 and B2, the precession movement of the shaft portion 15 is reliably suppressed.
As described above, since the shaft 15 does not precess, all the conventional problems caused by the precession can be solved.

For example, if the shaft portion 15 precesses, the turning radius of the turning portion 16 and particularly the spout 17 becomes larger than the set value. If the turning radius becomes larger than the set value, the compressed air will not hit the target location of the water removal or dust removal object, and as a result, water droplets, dust, etc. will be left behind.
However, as described above, if the container is packed in a cardboard box or the like with water droplets remaining in the food container, a major problem will occur thereafter, but in this embodiment such a situation does not occur at all.

Further, since the precession of the shaft portion 15 causes the bearings B1 and B2 and the shaft portion 15 to be unevenly worn, as a result, a gap is formed between the shaft portion 15 and the bearings B1 and B2, and there is tap water The chalk and dust enter and shorten the life of the water removal or dust removal spin nozzle itself.
However, according to this embodiment, the life of the water removal or dust removal spin nozzle can be extended reliably.

  Furthermore, since the opening 12 of the case C is covered with the covering member 30, the entry of water droplets or dust into the case C can be prevented. Moreover, since the compressed air is supplied from the small holes 32, the inside covered by the covering member 30 becomes higher than the atmospheric pressure. Therefore, the pressure difference can also prevent the entry of water droplets and dust.

  In particular, it is most suitable for removing water droplets after cleaning of food containers, machine parts and the like.

  C: Case, 11: Bottom, 12: Opening, T: Nozzle tube, 15: Shaft, 16: Swirl, B1, B2: Ball bearing, 30: Cover member, 30a: Lid, 30b: Hem, 32 ... Small hole

Claims (4)

The nozzle tube is rotatably incorporated in the case, and
The nozzle tube comprises a linear shaft portion and a turning portion whose inclination angle is maintained with respect to the axis of the shaft portion.
The case is a spin nozzle for water removal or dust removal provided with a bearing for rotatably supporting the shaft portion of the nozzle tube.
A spin nozzle for water removal or dust removal provided with a pair of bearings two-tiered in the axial direction of the shaft portion.   The spin nozzle for water removal or dust removal according to claim 1, wherein the bearing is a ball bearing. The case is provided with a bottom on one side and an opening on the other side, and a covering member is provided to close the opening,
The cover member is provided with a lid portion for closing the opening portion and a skirt portion which is continuous with the lid portion and extends to the outer peripheral side of the case, and the skirt portion covers all or a part of the outer periphery of the case. The spin nozzle for water removal or dust removal according to claim 1 or 2. The water removal or dust removal according to claim 3, wherein the shaft portion of the nozzle tube is formed with at least one small hole for injecting compressed air led into the nozzle tube into the cover member. For spin nozzles.

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