JPH07157888A - Cleaning device - Google Patents

Abstract

PURPOSE:To lighten the cleaning device and save the-power for cleaning off the working oil, etc., adhered to a large mechanical part, etc., by injecting a cleaning soln. by utilizing the pressure of the cleaning soln. to float a turntable carrying a material to be cleaned. CONSTITUTION:A pump 38 is started, and a cleaning soln. 46 is pressurized and injected toward a material 47 to be cleaned from an injection nozzle 41 through a discharge pipe 44. The soln. 46 is simultaneously passed through a valve 40, branched by a header 42 and sent to plural liq. chambers 31b on the upper surface of a holder 31. Consequently, the turntable 32 is slightly brought up, and the cleaning soln. flows between the holder 31 and turntable 32 while losing its pressure and flows out into a cleaning chamber 30. A motor 34 is then started to rotate the turntable 32 through a chain 36, and the cleaning soln. is injected on the entire periphery of the material 47 which is cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing processing oil and the like adhering to large machine parts and the like.

[0002]

2. Description of the Related Art One example of a conventional cleaning device of this type will be described with reference to FIGS. 3 is a front sectional view, and FIG. 4 is a left side sectional view.

In the figure, a hollow ring 4 having cleaning liquid supply ports 2 and 3 on both sides of a cylindrical cover 1,
5, the hollow rings 4, 5 are further provided with protrusions 6, 7 on the outer periphery thereof, and the frame 8 is provided with support rollers 9, 10 for engaging with the protrusions 6, 7.

Two supporting rollers 9 and 10 are provided, and are configured to support the hollow rings 4 and 5, respectively.

Next, pipes 11, 11 ... Are provided between the hollow rings 4, 5 and in the cylindrical cover 1 at appropriate intervals. The internal hollow portions of the hollow rings 4, 5 and the pipe 11,
The inner hollow portions of 11 ... Are made to communicate with each other.

Further, the pipes 11, 11, ... Are provided with a large number of injection nozzles 12, 12, ... Directed toward the center of the cylindrical cover 1. If the spray nozzles 12, 12, ... Are made too small, the sprayed cleaning liquid is diffused, which is not appropriate. Further, if the water passage in the spray nozzle is too short, the spraying liquid similarly diffuses.

The spray nozzle is preferably constructed so that the sprayed cleaning liquid does not diffuse as much as possible. Hollow ring 4,
5, and pipes 11 and 1 having injection nozzles 12, 12 ...
1 ... is inverted at an appropriate angle. These may be performed electrically using a motor or the like, or mechanically, but the hollow rings 4 and 5 may be supported by the support rollers 9 and 10 at an angle width of, for example, 30 ° by an air cylinder or the like not shown. It may be configured to rotate and return above.

Further, the turntable 1 is provided inside the pipe 11, 11 ... Having the injection nozzles 12, 12.
3 is provided. In the case of this conventional example, the support plate 14 supported by the frame 8 is inserted from the lateral direction of the cylindrical cover 1, and the turntable 1 supported by the bearing 15 at the tip thereof.
3, the center shaft 16 of the turntable 13 is projected downward to fix a gear 17, and the gear 17 and a motor 18 provided outside the cylindrical cover 1 are connected by a chain 19. .

In the figure, reference numeral 20 is an inlet cover made of neoprene rubber or the like, which is constructed so that the cleaning liquid does not splash outside during cleaning.

Further, in the conventional example, a cleaning liquid circulating device 21 is provided below the above device.

The circulation device 21 is a device for supplying the cleaning liquid therein to the supply ports 2 and 3 of the hollow rings 4 and 5,
The cleaning liquid is sprayed from the spray nozzles 12, 12, ..., and is composed of a device for removing and discharging oil floating on the upper surface of the collected cleaning liquid by overflow and the like, and heating the cleaning liquid to a constant temperature. The cleaning liquid from which oils have been removed is circulated.

In the conventional example having the above-mentioned structure, the objects to be cleaned a stacked on a tray or the like are supplied and placed on the turntable 13, and the pipes 11, 11 ... Having the hollow rings 4, 5 and the injection nozzles 12, 12 ,. The cleaning liquid may be jetted while being reversed, and at the same time, the turntable 13 may be rotated at a predetermined speed. As a result, the cleaning liquid is sprayed onto the object a to be cleaned from various different directions, and cleaning can be performed from the entire circumferential direction of the object a to be cleaned, and an extremely excellent cleaning effect can be obtained. (For example, JP-A-55-2770
(See issue)

[0013]

By the way, a roller for supporting a rotary table on which an object to be cleaned is placed and rotated in a cleaning chamber is
In the above-mentioned conventional example, a steel ball is simply used, but a roller bearing is generally used, and the bearing part is degreased or corroded by the lubricating oil, so that the service life is shortened. .

Further, when the object to be cleaned is large and the weight thereof is large, a large roller bearing is required,
There is a problem that the height of the rotary table becomes high and the price of the bearing becomes high.

An object of the present invention is to provide a new cleaning device that solves these problems.

[0016]

As a structure for achieving the above-mentioned object, a cleaning apparatus of the present invention is such that an object to be cleaned is placed and rotated on a disk-shaped rotary table provided in a cleaning chamber, In a cleaning device that sprays cleaning liquid pressurized by a pump from a spray nozzle, the rotary table is concentrically rotatably mounted on a disk-shaped fixed table fixed in the cleaning chamber, and the fixed table is fixed. Is characterized in that a liquid chamber is provided on the upper surface of the pump and the discharge chamber of the pump is communicated with the liquid chamber.

Further, the liquid chambers provided on the upper surface of the fixing table in the cleaning device are radially arranged in a plurality of chambers on the same circumference of the fixing table or are annularly arranged in plural rows on the fixing table. It is good to arrange.

Further, it is also effective to mount an injection nozzle for injecting the cleaning liquid from the pump on the arm tip of the robot and synchronize the injection from the injection nozzle with the operation of the rotary table.

[0019]

In the cleaning apparatus of the present invention configured as described above, when the pump is started by mounting the object to be cleaned on the rotary table mounted on the fixed table mounted in the cleaning chamber, the cleaning liquid is injected from the injection nozzle to the object to be cleaned. At the same time as the cleaning liquid is sprayed on, the cleaning liquid enters the liquid chamber provided on the upper surface of the fixed base, and the rotary base is lifted from below by the pressure of the cleaning liquid.

A small gap is formed between the fixed base and the rotary base, and the cleaning liquid fills the gap to support the rotary base and overflows from the outer peripheral portion into the cleaning chamber. The motor is started to rotate the rotary table floating above the cleaning liquid via, for example, a chain to continue the cleaning.

The cleaning liquid used for cleaning and floating the rotary table is returned to the cleaning liquid tank from the bottom of the cleaning chamber, and after removing oil and foreign substances, it is sucked by the pump and circulated.

[0022]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view showing a main part of the cleaning device of the present invention,
FIG. 2 is a front sectional view of the device.

In FIG. 1 and FIG. 2, 30 is a cleaning chamber, 31
Is a disc-shaped fixing base fixed to the bottom of the cleaning chamber 30, 31
a is a guide hole provided in the central portion of the fixed base 31, 31b is a plurality of liquid chambers provided concentrically on the same circumference on the upper surface of the fixed base 31 (in the case of four in the figure, (Shown), the liquid chamber communicates with the discharge side of the cleaning liquid pressure pump 38 through a pipe. Reference numeral 32 denotes a disk-shaped rotary base having the same diameter, which is slidably rotatably mounted on the fixed base 31, 32a denotes a sprocket fixed to the outer peripheral surface of the rotary base 32, and 33 denotes the rotary base 32.
Fixed to the bottom surface of the (four figures are shown in the figure)
Roller (cam follower), and the roller 33 is the fixed base 3
It is engaged with a guide hole 31a provided at the center of 1. 34 is a motor fixed in the cleaning chamber 30, 35 is a sprocket attached to the output shaft of the motor 34, 36 is a chain wound between the sprocket 35 and the sprocket 32a of the rotary base 32, and the roller The rotary table 32 is arranged on the same circumference of the rotary table 32, engages with the guide hole 31a of the fixed table 31, and the rotary table 32 rotates concentrically with the fixed table 31.

Further, 37 is a cleaning liquid tank, 38 is a cleaning liquid pressure pump, 39 and 40 are flow rate adjusting valves, and 41 is a plurality (only one is shown in the figure) supported on the side wall of the cleaning chamber 30. An injection nozzle, 42 is a header, 43 and 44 are suction pipes and discharge pipes of the pump 38, 45 is a return pipe, 46 is a cleaning liquid, 47 is an object to be cleaned, and the discharge pipe 44
Communicates with the injection nozzle 41 through the valve 39, and partly with the header 42 through the valve 40 and communicates with the liquid chamber 31b of the fixed base 31.

The discharge side of the pump 38 communicates with a plurality of injection nozzles 41 provided on the side wall of the cleaning chamber 30, and a cleaning liquid tank 37 is provided outside the cleaning chamber so that it is connected to the bottom of the cleaning chamber 30 and the pump 38. Piping between them forms a circulation circuit for the cleaning liquid.

The depth of the liquid chamber 31b is preferably made shallow so that the flow velocity of the cleaning liquid does not become large, and a plurality of liquid chambers are integrally formed in an annular shape (a plurality of cleaning liquid inlets are provided). May be.

An oil removing device for the cleaning liquid 46, a strainer and the like are not shown.

Next, the operation of the apparatus having the above structure will be described.
When the pump 38 is started, the suction pipe 43 is removed from the cleaning liquid tank 37.
The cleaning liquid 46 that has been sucked through the pressurization is pressurized (for example, 10 kgf
/ Cm ² ) and is sent out to the discharge pipe 44, and is mainly injected through the valve 39 from the injection nozzle 41 toward the object 47 to be cleaned.

At the same time, the cleaning liquid 46 is branched by the header 42 through the valve 40 and sent to the plurality of liquid chambers 31b of the fixed base 31. Since the area of the plurality of liquid chambers 31b is sufficient to lift the weight of the rotary table 32 and the object to be cleaned 47 by the hydraulic pressure of the cleaning liquid 46, the rotary table is slightly lifted to increase the pressurizing area. The cleaning liquid 46 flows between the fixed base 31 and the rotary base 32 while losing pressure and flows from the outer peripheral portion to the cleaning chamber 30.
Spills in.

Here, the motor 34 is started, the rotary table 32 is rotated through the chain 36, and the cleaning liquid 46 is sprayed on the entire circumference of the object 47 to be cleaned for cleaning.

Since the rotary table 32 is supported by the cleaning liquid 46 and floats, the rotary table 32 is in a completely fluid lubricated state, and the friction against the rotary motion is extremely small, and therefore the power loss is extremely small.

The cleaning liquid 46, which is used for cleaning and floating of the rotating table 32 and for lubrication and collected at the bottom of the cleaning chamber 30, is returned by a return pipe 45.
And then returned to the cleaning liquid tank 37. Note that oil and foreign matter are removed by a device (not shown) on the way.

In some cases, the floating of the turntable 32 and the injection of the cleaning liquid from the injection nozzle 41 may not be performed at the same time. Further, the injection nozzle can be attached to the arm tip of a robot (for example, an articulated robot) to wash the object to be cleaned in synchronization with the operation of the rotary table.

The embodiments of the present invention have been briefly described above, but the present invention is not limited to the above-mentioned embodiments, and various design changes can be made within the scope of the technical idea of the present invention, and any of them can be applied to the present invention. Belong to the technical scope of.

[0035]

In the cleaning apparatus of the present invention, the rotary base is replaced with the conventional roller and is supported by the thin film of the cleaning liquid to rotate, so that the following effects can be obtained. (1) Since the weight of the object to be cleaned and the turntable are supported by the entire lower surface of the turntable, the external force applied to the turntable from below does not become a concentrated load as in the case of using rollers, and the turntable is stronger in terms of strength. It can be made thin, which is particularly advantageous for large parts and heavy weights.

(2) Since a roller which is repeatedly exposed to a high stress and exposed to a cleaning liquid and is liable to wear is not used, the service life becomes long, the work of replacing the worn roller is eliminated, and the supporting portion of the rotary table has the height of the roller. The device can be made compact because it can be lowered.

(3) Since the pressure of the cleaning liquid is used to float the rotary table, no special hydraulic pressure generator is required, and the skins of the fixed table and the rotary table that come into contact with liquid are relatively rough. Moreover, the cost can be reduced because a large expensive bearing is not used.

(4) The friction between the rotary base and the fixed base is a complete lubrication friction, and the frictional force is small, so that the power loss is small.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of a cleaning device according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the device.

FIG. 3 is a front sectional view of a conventional cleaning device.

4 is a left side sectional view of the device of FIG.

[Explanation of symbols]

 30 cleaning chamber 31 fixed table 31b liquid chamber 32 rotary table 38 pump 41 injection nozzle 44 discharge pipe 46 cleaning liquid 47 object to be cleaned

Claims (3)

[Claims] 1. A cleaning apparatus in which an object to be cleaned is placed and rotated on a disk-shaped rotary table provided in a cleaning chamber, and a cleaning liquid pressurized by a pump is injected from an injection nozzle to perform cleaning. A rotary table is concentrically rotatably mounted on a disk-shaped fixed table fixed in the cleaning chamber, a liquid chamber is provided on the upper surface of the fixed table, and the liquid chamber and the discharge pipe of the pump are communicated with each other. A cleaning device characterized in that 2. The liquid chambers provided on the upper surface of the fixed base are radially arranged in a plurality of chambers at intervals on the same circumference of the fixed base or are annularly arranged on the fixed base in plural rows. The cleaning device according to claim 1, wherein: 3. The cleaning according to claim 1, wherein an injection nozzle for injecting a cleaning liquid from a pump is attached to the tip of the arm of the robot, and the injection from the injection nozzle is synchronized with the operation of the rotary table. apparatus.