JPH1161469A - Pretreatment cleaning equipment for painting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely remove foreign substances such as iron powder adhering to and remaining on a vehicle body in a pre-painting treatment of an automobile body, and to perform a pre-processing of the removed foreign substances such as iron powder. The purpose of the present invention is to prevent problems such as entering into each tank. SOLUTION: A large amount of cleaning liquid is jetted from a cleaning liquid jet port 3 toward the inside and outside of a temporary assembled vehicle body W conveyed in an inclined posture along an inclined surface 1 and the jetted cleaning liquid is transferred along the inclined surface 1. This is received by the storage tank 4 at the lower end of the inclined surface 1 and the cleaning liquid in the storage tank 4 is sent to the purification tank 7, where iron powder and the like are removed by the purifier 9 such as a magnet filter to purify. After the cleaning, the purified washing liquid is sent out from the delivery pipe 11 and sent again to the washing liquid jet port 3.

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 removing iron powder, grinding dust, and the like adhering to and remaining on a vehicle body, for example, in a pretreatment before painting the body of an automobile.

[0002]

2. Description of the Related Art Conventionally, for example, a process of coating an automobile body includes a pretreatment process ranging from degreasing to coating chemical conversion treatment and washing with water before coating, and a coating process from electrodeposition coating as an undercoat to intermediate coating and top coating. The cleaning device for the vehicle body in the pretreatment includes, for example, Utility Model Registration No. 3
A cleaning apparatus for pre-coating treatment such as that described in Japanese Patent No. 037748 is known.

[0003] In the above-mentioned apparatus, in order to remove the degreasing solution, the chemical conversion treatment solution, the iron powder and the like adhering to the vehicle body after the film conversion treatment in the pretreatment process, the vehicle body is immersed in an immersion tank storing a cleaning liquid, When the body coming out of the tank is in an inclined posture, the cleaning liquid is intermittently sprayed toward the inside and outside of the body to discharge iron powder and the like remaining on the floor surface of the body.

[0004]

However, in the case of the above technique, the iron powder and the like remaining on the floor surface of the vehicle body are returned to the immersion tank together with the cleaning liquid by spraying the cleaning liquid, and thereafter, the iron powder is transferred to the immersion tank. There was a problem that it adhered to the immersed vehicle body.

[0005] Therefore, the present invention provides a pretreatment step for painting,
It is an object of the present invention to completely remove foreign matters such as iron powder adhering and remaining on a vehicle body, and to prevent a problem that the removed foreign matters such as iron powder enter each pretreatment tank.

[0006]

According to the present invention, in order to achieve the above object, in the pretreatment for painting a vehicle body, the pretreatment cleaning of the painting is performed so as to remove foreign matters and the like adhering to and remaining on the vehicle body. In the apparatus, a cleaning liquid jet port for spraying a cleaning liquid onto a vehicle body conveyed in an inclined posture along an inclined surface, a reservoir tank for receiving the cleaning liquid sprayed on the vehicle body along the inclined surface, and a reservoir tank After receiving the cleaning liquid and removing the foreign substances and the like for purification, a foreign substance removing circuit for sending the purified liquid as the cleaning liquid was provided.

[0007] The cleaning liquid sprayed mainly toward the inside of the vehicle body in an inclined position adheres to the floor surface of the vehicle body.
The remaining foreign matter such as iron powder is discharged onto the inclined surface from the opening in the floor surface or the opening of the tail gate on the inclined lower end side which is opened as necessary. Then, the cleaning liquid containing iron powder and the like is caused to flow down along the inclined surface and received by the storage tank, and the cleaning liquid in the storage tank is sent to a foreign substance removal circuit to remove foreign substances such as iron powder and to purify the cleaning liquid. The used liquid is sent out again as a cleaning liquid.

[0008] The location of the apparatus may be before the degreasing step in the pretreatment step or after the film formation treatment. As the cleaning liquid, for example, a degreasing treatment liquid or industrial water may be used before degreasing, and industrial water or warm water may be used after coating conversion treatment.

Further, the inclined surface for spraying the cleaning liquid and the inclined posture of the vehicle body may be such that a dedicated inclined surface is provided along the transport path of the vehicle body, or a dedicated inclined hanger path or the like is provided to incline the vehicle body. Although it is good, an existing inclined surface and an inclined hanger path for entering and exiting each processing tank may be used.

Further, the purified cleaning liquid which has been purified by the foreign matter removing circuit may be returned to the original cleaning liquid jet port, or may be returned to the cleaning liquid spraying section or the like at another location.

According to a second aspect of the present invention, the foreign matter removing circuit includes a purifying tank which communicates with the storage tank through a communication pipe and is divided into a plurality of separation tanks, and a separation tank located upstream of any one of the separation tanks. After the cleaning liquid was received and the foreign substances were removed and purified, the cleaning liquid was constituted by a purifier for sending the purified cleaning liquid to the downstream separation tank, and a delivery pipe for sending the purified cleaning liquid from the most downstream separation tank.

Then, the washing liquid in the storage tank is introduced into the purification tank through the communication pipe, and, for example, iron powder having a high specific gravity is precipitated in each separation tank, and at the same time, foreign substances are removed and purified by the purifier. Here, an appropriate purifier is selected according to the type of foreign matter or the like. For example, a magnet filter or the like is effective in removing iron powder or the like. Then, the cleaned cleaning liquid is sent out from the delivery pipe.

[0013] According to a third aspect of the present invention, the cleaning liquid jet port can jet the cleaning liquid at a flow rate of at least 1000 liter / min.

Here, for example, the utility model registration No. 303
No. 7748 discloses a cleaning liquid spray flow rate of 100 to 500 liters / min. For example, when the present cleaning apparatus is applied before a degreasing step or the like, iron powder or the like that adheres to and remains on a vehicle body often increases. , 100-500 liter / min may not be completely removed. So at least 100
The cleaning liquid is spouted at a flow rate of 0 liter / min to enhance the removing action. By the way, in order to secure such a large flow rate, it is preferable that the nozzle is not attached to the pipe port, but is ejected directly from the pipe port.

According to a fourth aspect of the present invention, the apparatus is provided upstream of the degreasing step in the pretreatment for coating. That is, the degreasing process is generally the beginning of the pretreatment, and since a large amount of iron powder, polishing debris, and the like is attached to and remains on the body to be fed, the iron powder and the like are strongly removed by the present apparatus.

According to a fifth aspect of the present invention, when an overflow tank is provided on the upstream side of the degreasing tank as the degreasing equipment in the degreasing step, the storage tank is disposed so as to overlap with the overflow tank. In this way, if the reservoir tank is provided overlapping the upper part of the overflow tank, space can be saved and the existing facilities can be used to the maximum extent, such as the use of the inclined surface when entering the degreasing tank. It is planned.

[0017]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a schematic diagram of a first configuration example of a pretreatment cleaning apparatus according to the present invention, FIG. 2 is a schematic diagram of a second configuration example, and FIG. 3 is a process diagram of a painting pretreatment process.

The pre-treatment cleaning device according to the present invention is applied as a pre-degreasing cleaning device before degreasing a vehicle body temporarily assembled in a vehicle body temporary assembling step in a pre-treatment before a vehicle body painting as shown in FIG. 3, for example. Then, the present device removes iron powder, iron chips and the like adhering and remaining on the temporarily assembled vehicle body, and then sends it to a degreasing process.

Incidentally, the vehicle body which has been preliminarily degreased is immersed in a degreasing tank, then degreased by showering the degreased liquid, rinsed with a shower of rinsing water and immersed in the cleaning tank, and subjected to a surface conditioning tank. To perform a surface conditioning treatment, and then immersed in a film forming treatment tank to perform a film forming treatment. After that, a water washing process is performed by shower washing, dip washing, and pure water shower washing with washing water to completely remove a processing solution, iron powder, and the like adhering to the surface, and then send it to an electrodeposition coating process.

As shown in FIG. 1, the cleaning apparatus according to the present invention is configured by using an inclined surface 1 between a vehicle body temporary assembling step and a degreasing step. A ceiling conveyor 2 that is inclined along is provided.

The temporarily assembled vehicle body W conveyed along the ceiling conveyor 2 is conveyed in an inclined posture on the inclined surface 1, and a predetermined position on the upper side of the inclined surface 1 is inclined. A cleaning liquid jet port 3 for spraying the cleaning liquid toward the inside and outside of the temporary assembly vehicle body W is provided.
Below the inclined surface 1, there is provided a storage tank 4 for receiving the cleaning liquid falling on the inclined surface 1.

The cleaning liquid jet port 3 can jet at least 1000 liters of cleaning liquid per minute by a delivery pump 12 described later by directly jetting from a pipe or the like without attaching a nozzle to a tip of the pipe or the like. Like that. In the embodiment, industrial water and hot water are used as the cleaning liquid.
Twelve degreasing solutions may be used.

A foreign matter removing circuit 5 is connected to the bottom of the storage tank 4 for removing foreign matter such as iron powder from the cleaning liquid in the storage tank 4 for purification and returning the cleaned cleaning liquid to the cleaning liquid jet port 3. ing. The foreign matter removing circuit 5 includes a communication pipe 6 connected to the bottom of the storage tank 4, a purification tank 7 to which the communication pipe 6 communicates, the purification tank 7 and the cleaning liquid jet port 3.
Is provided.

The purification tank 7 includes a first tank 7a as a separation tank, a second tank 7b,
The communication pipe 6 is separated into a tank 7c and three tanks.
While communicating with the first tank 7a, the second tank 7b is adapted to receive and store the supernatant liquid overflowing from the first tank 7a.

After the cleaning liquid in the second tank 7b is pumped up between the second tank 7b and the third tank 7c by the pump 8, and the iron powder or the like is removed by the purifier 9 such as a magnet filter to purify the cleaning liquid. , A purification mechanism for feeding the purified liquid into the third tank 7c is provided, and a partition between the second tank 7b and the third tank 7c holds the liquid amount in the third tank 7c. Communication hole 10 is provided below the liquid level.

A delivery pipe 1 for sending the purified cleaning liquid toward the cleaning liquid jet port 3 is provided in the third tank 7c at the most downstream side.
1 is provided, and a delivery pump 12 is provided in the middle of the delivery pipe 11. In addition, a drain cock for discharging foreign substances such as precipitated iron powder is provided at the bottom of the first to third tanks 7a to 7c.

The operation of the above-described cleaning device will be described. In the vehicle body temporary assembling process, the temporarily assembled vehicle body W is temporarily assembled, is conveyed on the inclined surface 1 in an inclined posture, and the cleaning liquid is jetted from the cleaning liquid jet port 3 toward the inside and outside of the temporary assembled vehicle body W. At this time, the tailgate of the temporary assembled vehicle body W is slightly opened by a jig or the like, and the tailgate side of the temporary assembled vehicle body W is conveyed to the inside of the temporary assembled vehicle body W by being conveyed. The jetted cleaning liquid is easily discharged to the outside through the open gap of the tail gate on the lower end side of the slope.

The jetting of the cleaning liquid from the cleaning liquid jet port 3 is performed in a large amount of up to 1000 liters per minute, such as iron powder, iron dust, etc. which cannot be removed with the conventional blowing rate of about 500 liter / min. Can be reliably removed from the temporarily assembled vehicle body W and washed away.

The iron powder and the like washed out together with the cleaning liquid fall on the inclined surface 1 and then flow downward to be stored in the storage tank 4, and the cleaning liquid and foreign matter such as iron powder in the storage tank 4 are connected to the communication pipe. 6 and fed into the first tank 7 a of the purification tank 7.

In the first tank 7a, foreign substances such as iron powder having a high specific gravity settle, and the relatively clear supernatant liquid in the upper layer overflows and is sent to the second tank 7b. And this second tank 7b
In the same manner, foreign substances having a high specific gravity are similarly precipitated, and the cleaning liquid inside is sent to a purifier 9 such as a magnet filter by a pump 8 and the cleaning liquid purified by the purifier 9 is supplied to a third tank 7c.
Send it back to

Thus, the cleaning liquid in the third tank 7c is removed of foreign substances such as iron powder contained therein, sent from the delivery pump 12 through the delivery pipe 11 to the cleaning liquid ejection port 3, and ejected again as the washing liquid. At this time, in the third tank 7c, the communication holes 10
As a result, the liquid amount is maintained at the same level as that of the second tank 7b, so that occurrence of a trouble due to a shortage of the liquid amount is prevented. In addition, foreign matter such as iron powder accumulated at the bottoms of the first to third tanks 7a to 7c is discharged by operating each drain cock.

With the above-described cleaning apparatus, it is possible to prevent a foreign substance such as iron powder from entering a downstream degreasing tank or the like, thereby improving the surface treatment and the quality of the coating pretreatment.

Next, a second configuration example of the present invention will be described with reference to FIG. This configuration example is a configuration example in which the storage tank 4 is disposed so as to overlap the upper part of the overflow tank 14 of the degreasing tank 13, and is particularly effective when the space on the upstream side of the degreasing tank 13 is restricted. It is. In the drawing,
The same components as those in the above example are denoted by the same reference numerals.

The overflow tank 14 is disposed upstream of the degreasing tank 13, and the inclined surface 1 uses an inclined portion for allowing the temporary assembled vehicle body W to enter the degreasing tank 13. The reservoir 4 formed at the lower end of the inclined surface 1 is provided above the overflow tank 14.

In this configuration example, the cleaning liquid sent to the cleaning liquid jet port 3 uses the degreasing liquid in the overflow tank 14 as the cleaning liquid, and the cleaning liquid purified in the purification tank 7 flows out of the degreasing tank 13. Spray part 1 on the tank side
5 to wash the shower. Further, the foreign matter removal circuit 5 is connected to the communication pipe 6, the purification tank 7, and the delivery pipe 11.
And the delivery pump 12, and the configuration of the purification tank 7, the divisional configuration of the purification tank 7, and the configuration of the purification mechanism including the pump 8 and the purifier 9 are the same as those in the first configuration example.

In the above-described second configuration example, the degreasing solution having a pH of about 11 to 12 in the overflow tank 14 is
The cleaning liquid is discharged from the cleaning liquid discharge port 3 toward the inside and outside of the temporary assembled vehicle body W by the pump 16.

The cleaning liquid and the washed away foreign substances such as iron powder flow down the inclined surface 1 and are received by the storage tank 4, passed through the communication pipe 6 and sent to the first tank 7 a of the purification tank 7, and then purified. Purified by the vessel 9 and the like. Then, the purified cleaning liquid is sent from the third tank 7c to the spray unit 15 through the delivery pipe 11, and is used as a spray liquid for shower cleaning after the degreasing and immersion treatment, and then returned to the degreasing tank 13.

Also in the case of this configuration example, since the cleaning liquid for cleaning the temporary assembled vehicle body W does not directly enter the degreasing tank 13, the pretreatment and the coating quality can be improved, and the existing equipment and the like can be reduced to a maximum. While saving space.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as that described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example,
In addition to applying this apparatus to the pretreatment of the degreasing step, the apparatus may be applied to a cleaning apparatus after the film formation treatment, and the cleaning liquid may be pure water. Furthermore, even if the number of divisions of the purification tank 7 is two,
Alternatively, the number may be four or more.

[0040]

As described above, according to the pretreatment cleaning apparatus of the present invention, the cleaning liquid is sprayed on the vehicle body conveyed in an inclined posture along the inclined surface, and the sprayed cleaning liquid is inclined. In addition to flowing down along the surface, this is received in the storage tank, and a foreign matter removal circuit that removes iron powder and the like from the cleaning liquid in the storage tank and makes it a cleaning liquid again is provided, so that the cleaning liquid is supplied to a processing tank for pretreatment. The problem that foreign matter such as iron powder adheres directly to the vehicle body due to direct entry is eliminated. On this occasion,
If the foreign matter removing circuit is configured as in claim 2, foreign matter and the like can be reliably removed. Further, if the cleaning liquid is jetted at a flow rate of at least 1000 liter / min from the cleaning liquid jet port as described in claim 3, for example, even when a large amount of foreign matter adheres or remains on the vehicle body, it can be reliably purified. Claim 4
If this device is provided on the upstream side of the degreasing step as described above, the situation where iron powder or the like is mixed in each pretreatment tank after the degreasing treatment tank can be extremely limited. In addition, if the storage tank is disposed so as to overlap the overflow tank of the degreasing tank as described in claim 5, the space can be saved while maximizing utilization of existing facilities and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a first configuration example of a pretreatment cleaning apparatus according to the present invention.

FIG. 2 is a schematic diagram of a second configuration example.

FIG. 3 is a process diagram of a coating pretreatment process.

[Description of Signs] 1 ... Slope, 3 ... Washing liquid outlet, 4 ... Reservoir, 5 ... Contamination removal circuit, 6 ... Communication pipe, 7 ... Purification tank, 7a ... First
Tank 7b Second tank 7c Third tank 9 Purifier 11
Delivery pipe, 13: degreasing tank, 14: overflow tank, 15 ...
Spray part, W ... Temporary assembly body.

Claims (5)

[Claims] 1. A pretreatment for painting a vehicle body, the method comprising:
A pre-cleaning apparatus for coating that removes remaining foreign matter and the like, wherein the cleaning liquid jet sprays a cleaning liquid onto a vehicle body that is conveyed in an inclined posture along an inclined surface, and the cleaning liquid that is sprayed on the vehicle body is inclined. A paint tank having a reservoir for receiving a flow down along a surface, and a foreign matter removing circuit for receiving the cleaning liquid in the reservoir, removing foreign substances and purifying the same, and sending out the purified liquid as a cleaning liquid. Pretreatment cleaning equipment. 2. The cleaning apparatus according to claim 1, wherein the foreign matter removing circuit is connected to the storage tank by a communication pipe and divided into a plurality of separation tanks, and the separation tank. A purifier that receives the cleaning liquid from any one of the upstream separation tanks, removes foreign substances, etc., purifies the cleaning liquid, and then sends the purified cleaning liquid to the downstream separation tank, and purifies the cleaning liquid from the most downstream separation tank. A pretreatment cleaning apparatus for coating, comprising a delivery pipe for delivering a used cleaning solution. 3. The pretreatment cleaning apparatus for coating according to claim 1, wherein the cleaning liquid jet port is capable of jetting a cleaning liquid at a flow rate of at least 1000 liter / min. Pretreatment cleaning equipment for painting. 4. The pre-cleaning apparatus for coating according to claim 1, wherein the apparatus is provided upstream of a degreasing step in pre-processing of coating. Pretreatment cleaning equipment for painting. 5. The pretreatment / cleaning apparatus for coating according to claim 4, wherein the degreasing equipment in the degreasing step is provided with an overflow tank upstream of the degreasing tank, and the storage tank is provided at an upper part of the overflow tank. A pre-treatment cleaning device for painting, which is disposed in an overlapping manner.