JP3166048B2 - Cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus for cleaning a work or the like after heat treatment by immersing the work or the like in an immersion tank filled with a cleaning liquid.

[0002]

2. Description of the Related Art For example, dust or oil used in a heat treatment process adheres to the surface of a work after heat treatment.
Therefore, it is necessary to clean the surface of the work after the heat treatment. In such a case, cleaning may be performed by immersing the work in an immersion tank filled with the cleaning liquid, and in this case, it is necessary to constantly change the cleaning liquid in contact with the work surface and to stir the cleaning liquid to improve the cleaning effect. is there. Therefore, it has been conventionally performed to provide a nozzle at the inner bottom of the immersion tank, generate bubbles from the nozzle, and agitate the cleaning liquid by rising the bubbles. As such a cleaning apparatus, for example, according to Japanese Patent Application Laid-Open No. 2-268879, a nozzle for generating bubbles is provided in the center of the inner bottom of the immersion tank, and the cleaning liquid is stirred by the bubbles from the nozzle and the surface of the cleaning liquid floats. There is known a configuration in which the dirt is radially flowed toward the peripheral portion to overflow the dirt, so that the dirt floating on the surface of the cleaning liquid does not adhere to the work when the work is lifted from the immersion tank.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
The cleaning liquid rises in the central part of the immersion tank together with the bubbles, flows radially on the surface of the cleaning liquid toward the peripheral part, then descends along the peripheral wall of the immersion tank, and further flows from the peripheral part to the central part at the bottom part, and is immersed. Convection occurs in the tank. When such convection occurs, dirt floating on the surface of the cleaning liquid overflows from the periphery of the immersion tank and is discharged, but dirt floating in the cleaning liquid rises to near the cleaning liquid surface and is immersed in the convection of the cleaning liquid. Since it descends along the peripheral wall of the tank, it is not effectively discharged from the immersion tank, and a problem arises that the contamination of the cleaning liquid proceeds.

Accordingly, an object of the present invention is to provide a cleaning apparatus capable of effectively discharging dirt floating in the cleaning liquid as well as dirt floating in the cleaning liquid from the immersion tank in order to solve the above-mentioned problems. .

[0005]

In order to achieve the above object, the present invention relates to an apparatus for immersing a work in an immersion tank and cleaning the work while overflowing a cleaning liquid from around the immersion tank. A nozzle for generating air bubbles is provided at a central portion and a peripheral portion of the inner bottom portion, and the amount of air bubbles generated from the nozzle at the central portion is larger than the amount of air bubbles generated from the nozzles at the peripheral portion. .

[0006]

Since the amount of bubbles generated at the center is larger than the amount of bubbles generated at the periphery, a radial flow from the center toward the periphery is generated on the surface of the cleaning liquid, and dirt floating on the surface of the cleaning liquid is generated. Overflows from the periphery of the immersion tank and is discharged from the immersion tank. Further, the dirt floating in the cleaning liquid rises to the vicinity of the cleaning liquid surface by the flow of the bubbles in the central part, and moves to the peripheral part as it is. However, air bubbles from nozzles provided on the inner bottom peripheral edge of the immersion tank prevent the flow of the cleaning liquid that is going to descend along the peripheral wall of the immersion tank, whereby dirt floating in the cleaning liquid descends in the immersion tank. It overflows from the periphery of the immersion tank and is discharged without performing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a cleaning device, in which a lifting frame 12 which is raised and lowered by a lifting cylinder 11 along a guide rail 13 is provided.
When a pallet P on which a number of works W are mounted is conveyed on guide rails 14 provided at the bottom of the elevating frame 12, the elevating frame 12 is lowered, and the elevating frame 12 is immersed in the immersion tank 2 to remove the work W. After the washing, the pallet P is pulled up together with the lifting frame 12, and the pallet P and the injection nozzle of the pipe 15 attached to the lifting frame 12 so as to be rotatable around a vertical axis.
The cleaning liquid is sprayed onto the work W from the spray nozzle of the moving pipe 16 reciprocating below the work, and the work is rinsed, and the pallet P is discharged from the cleaning device 1.

In the case of the present embodiment, the work W is a counter shaft used for an automatic transmission.
In addition, the pallet P is formed by vertically connecting a base plate PL having openings PH of the same number as the number of works W to be placed and a girder-shaped guide frame PU via connecting rods PB at four corners and five centers at each center. It is a concatenation. Also, at least three support projections P are provided on the upper surface of the peripheral portion
S is erected, and the side surface of the gear portion WG provided on one peripheral surface of the work W is supported by the support projection PS so that the bottomed deep hole portion WH opens downward.

As shown in FIG. 2, at the bottom of the immersion tank 2, an air supply pipe 22 is disposed at a central portion, and an air supply pipe 23 is disposed at a peripheral portion. 2
2 and 23 are both branched from the main pipe 3 connected to the compressor. A nozzle (not shown) for generating air bubbles is attached to each of the air supply pipes 22 and 23, and the number of nozzles per unit length is determined by the air supply pipe 22. Set to be more. Further, although not shown, a cleaning liquid is constantly supplied to the immersion tank 2 by a pump, whereby the overflowing cleaning liquid is collected by a gutter 21 provided on the outer periphery of the immersion tank 2 and returned to the cleaning liquid tank. After separating the dirt from the immersion tank 2, the cleaning liquid was supplied to the immersion tank 2 again.

According to the above configuration, when the pallet P on which the work W is mounted descends together with the lifting frame 12 and is immersed in the immersion tank 2, the air from the compressor is supplied from the main pipe 3 to the air supply pipes 22 and 23. Air bubbles are generated from the nozzles of both air supply pipes 22 and 23 by pressure feeding. At this time, the number of nozzles per unit length is set to be larger in the air supply pipe 22, so that the amount of air bubbles generated in the central portion becomes larger than the amount of air bubbles generated in the peripheral portion. The dirt that has risen together with the air bubbles from the nozzle 22 flows toward the periphery on the upper surface of the cleaning liquid and in the vicinity thereof. Then, the dirt floating on the surface of the cleaning liquid overflows to the gutter 21 together with the cleaning liquid. On the other hand, dirt floating near the cleaning liquid is prevented from descending along the peripheral wall of the immersion tank 2 by bubbles from the nozzle of the air supply pipe 23, and overflows to the gutter 21 together with the cleaning liquid.

In the above embodiment, the two air supply pipes 22 and 23 are connected to one main pipe 3 and the number of nozzles per unit length of the two air supply pipes 22 and 23 is different. Air is supplied to the air pipe 22 and the air supply pipe 23 by different systems,
By making the supply pressure on the air supply pipe 22 side higher than the supply pressure on the air supply pipe 23 side, the amount of bubbles generated in the central part may be made larger than in the peripheral part.

[0012]

As is clear from the above description, according to the present invention, when a workpiece is immersed in an immersion tank and washed,
Dirt floating in the cleaning liquid as well as dirt floating on the surface of the cleaning liquid can be effectively overflowed and discharged from the immersion tank.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a cleaning apparatus to which the present invention is applied.

FIG. 2 is a sectional view taken along the line II-II.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing apparatus 2 Immersion tank 3 Main pipe 11 Elevating cylinder 12 Elevating frame 22 Air supply pipe (disposed at the center) 23 Air supply pipe (disposed at the periphery) P Pallet W Work

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tadao Sugano 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (56) References JP-A-64-57624 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) C23G 3/00 C23G 5/04 B08B 3/10

Claims (1)

(57) [Claims] An apparatus for immersing a work in an immersion tank and washing the work while overflowing a cleaning liquid from the periphery of the immersion tank, wherein a nozzle for generating air bubbles at the center and the peripheral edge of the inner bottom of the immersion tank is provided. A cleaning device, wherein the cleaning device is configured so that the amount of bubbles generated from a nozzle at a central portion is larger than the amount of bubbles generated from a nozzle at a peripheral portion.