JP2003213491A - Method and equipment for controlling body floatage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide body flotage control equipment by which body flotage during dipping can be suppressed independently of the type of motor vehicle of the body. <P>SOLUTION: The equipment has: a tank 1 for storing a treatment solution L which is identical with a treatment solution L in which the body 9 to be treated is immersed; a nozzle 2 for pouring the treatment solution L supplied from the tank 1 into the inside of the body 9 introduced into a treatment tank 10; a valve 5 provided between the tank 1 and the nozzle 2; and a limit switch 4 for detecting the timing of pouring of the treatment solution according to the introduction of the body 9 into the tank. According to the detected timing of pouring, the supply of the treatment solution from the tank 1 to the nozzle 2 is controlled. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body restraining method and a body restraining device for restraining a body of an automobile, which is subjected to pretreatment or electrodeposition coating, from entering the treatment tank.

[0002]

2. Description of the Related Art When a body is put into a processing tank, it is observed that the body does not sink easily and floats in the processing liquid. Such "floating" of the body is likely to occur when the conveyor speed is fast, when the tank entry angle of the body is large, or when the processing liquid is difficult to enter into the body structure. In such a case, even though the weight of the body is 300 to 500 kg / unit, it floats like a ship due to the large buoyancy. Moreover, in recent years, the conveyance speed has tended to increase from the viewpoint of improving productivity, and the holes in the body have become smaller and fewer from the viewpoint of improving sound and vibration performance. Therefore, the above-mentioned "floating" of the body has become an important issue. To solve this problem, a lock mechanism has been provided on each hanger for fixing the body. According to this lock mechanism, the body is forcibly immersed in the processing tank without floating.

[0003]

However, when the bodies of different vehicle types are conveyed to one conveyor, the common position of the bodies fixed by the lock mechanism cannot be determined, and the different bodies can be properly handled. There was a problem that it could not be fixed. Further, since such a lock mechanism is mounted on each of a number of hangers, the equipment cost increases. The present invention has been made in view of the above problems of the prior art, and a body floating suppressing method and a body for suppressing body floating during immersion pretreatment or electrodeposition coating regardless of the vehicle type of the body. An object is to provide a floating suppression device.

[0004]

(1) In order to achieve the above object, according to the invention of claim 1, a body mounted on a hanger that is hung and conveyed by a conveyor rail has a pretreatment liquid. Alternatively, there is provided a body floating suppressing method which, when entering a treatment tank filled with a treatment liquid containing an electrodeposition paint, injects the same treatment liquid as the treatment liquid into the body into which the treatment liquid is contained. In the present invention, it is preferable that the treatment liquid is injected into the body through a nozzle from a side window of the body to be bathed (Claim 2), or the treatment liquid is front of the body to be bathed. It is preferably injected into the body from a window through a gutter provided in the hanger (claim 3). It is preferable that the method of injecting the treatment liquid is appropriately determined according to the degree of floating due to the structure, weight, etc. of the body, but 100 liters to 500 liters of the treatment liquid is injected into the body within 10 seconds. It is preferable to do so (claim 4).

According to the present invention, when the body enters the processing tank filled with the processing solution, the same processing solution as that in the processing tank is injected into the body. When the body to be treated enters the treatment tank, the body is subjected to buoyancy. In particular, when the conveyor speed is high or the tank entry angle is large, a large buoyancy is applied. However, in the present invention, the weight of the processing liquid injected into the body increases the self-weight of the body itself, which cancels the buoyancy received by the body and suppresses the body from floating. Since the treatment liquid enters the body in which the floating is suppressed, the body quickly sinks into the treatment liquid, is sufficiently immersed in the treatment liquid, and can be appropriately treated. Further, since this processing liquid is directly injected into the interior of the body from the side window of the body through the nozzle or the front window through the gutter, the injected processing liquid touches the outer plate of the body. In addition, there is no fear of deteriorating appearance quality such as uneven processing.
Furthermore, since the treatment liquid is directly injected into the body, no bubbles are generated in the treatment liquid in the treatment tank.

The injection amount and the injection speed of the processing liquid injected to suppress the floating of the body can be appropriately determined according to the degree of floating of the body which is conveyed and enters the processing tank. That is, even when bodies of different vehicle types are conveyed by the same conveyor rail and processed, it is sufficient to inject an amount of treatment liquid according to each vehicle type, for example, it is necessary to specially modify each hanger or the like. It can be easily automated under the unified standard. In addition, the present invention proposes to inject the treatment liquid in an amount capable of suppressing the floating of each body at a time at the timing of entering the body. Specifically, 100 liters to 500 liters of the treatment liquid is injected into the body within 10 seconds. Due to this injection, the body is immediately immersed in the treatment liquid.

Thus, it is possible to provide a body floating suppressing method for suppressing body floating during immersion pretreatment or electrodeposition coating regardless of the vehicle type of the body to be treated.

(2) According to a fifth aspect of the invention from a different point of view, a tank for storing the same processing liquid as the processing liquid in which the body mounted on the hanger that is suspended and conveyed by the conveyor rail is immersed. An injection means for injecting the processing liquid supplied from the tank into the inside of the body that is filled in the processing tank filled with the processing liquid; and a detection means for detecting the injection timing of the processing liquid by the injection means. A body float having a valve that is provided between the tank and the injection means, and that adjusts the supply of the processing liquid from the tank to the injection means in accordance with the injection timing detected by the detection means. A suppression device is provided.

In the present invention, it is preferable that the injection means is a nozzle, and the nozzle injects the processing liquid into the inside of the body from a side window of the body (claim 6), or the injection. It is preferable that the means is a gutter, and the gutter is provided on the hanger and injects the treatment liquid into the inside of the body from a front window of the body (claim 7). The method of injecting the treatment liquid by the injecting means is preferably determined appropriately according to the degree of floating due to the structure, weight, etc. of the body, as in the above invention, but 100 liters to 500 liters of treatment liquid Is preferably injected into the body within 10 seconds (claim 8).

Further, it is preferable that the apparatus for suppressing body floating comprises a pump for sucking the processing liquid from the processing tank and sending it to the tank (claim 9), and in addition, the tank stores the processing liquid. It is preferable to provide overflow piping for sending to the processing tank (claim 10).

The present invention is an invention relating to a body lift suppressing device, which is a view of the present invention from a viewpoint different from the above invention.
According to the present invention, when the body enters the processing bath filled with the processing liquid, the injection means injects the processing liquid into the body. The injected processing liquid is the same as the processing liquid that fills the processing tank and is stored in the tank. The processing liquid in the tank is supplied to the injection means via the valve, and the supply is adjusted according to the injection timing detected by the detection means. With such a configuration, an appropriate amount of the processing liquid is injected into the body entering the processing tank at an appropriate timing, and the body is rapidly immersed in the processing liquid. And the effect can be obtained. Further, similarly to the above-mentioned invention, the injection of the treatment liquid is directly performed inside the body of the body through the nozzle from the side window of the body or through the gutter from the front window, and the same operation and effect as the above-mentioned invention Can be played.

In addition, in the present invention, a pump for sucking the processing liquid from the processing tank and sending it to a tank for storing the processing liquid is provided, and this tank is provided with an overflow pipe for sending the supplied processing liquid to the processing tank. And By using the processing liquid itself in which the body is immersed, the inside of the processing tank can be kept uniform. Strictly speaking, the concentration of the treatment liquid in the treatment tank changes depending on the amount of treatment such as chemical conversion treatment, electrodeposition treatment, and coating treatment. Therefore, if a new processing solution is injected even if it is the same type of processing solution and the injected processing solution flows out from the inside of the body after the body is immersed, it causes partial unevenness in the processing tank. There is a fear. Therefore, in the present invention, a pump for sucking the processing liquid from the processing tank in which the processing is currently performed is provided and the pump is injected into the body.

Further, the suction by the pump can bring about an advantage that a flow can be caused in the processing liquid in the processing tank and the stirring of the processing liquid is assisted. According to this idea, it is preferable that the pump operates constantly. Along with this, when the processing liquid sent to the tank exceeds a predetermined amount, it is preferable to provide an overflow pipe for sending the processing liquid to the processing tank. With this configuration,
With the operation of the pump, the processing liquid circulates between the processing tank and the tank, and the processing liquid in the processing tank can be stirred and kept in a uniform state.

Thus, it is possible to provide a body floating suppressing device which suppresses body floating during immersion pretreatment or electrodeposition coating regardless of the vehicle type of the body to be treated.

[0015]

According to the invention described in claims 1 to 10, the body floating suppressing method and the body floating suppressing method for suppressing the body floating in the immersion pretreatment or electrodeposition coating regardless of the vehicle type of the body to be processed. A suppression device can be provided.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Here, two embodiments of the body lift suppressing device 100 according to the present invention will be described. Of these two embodiments, the first embodiment is a body floatation suppression device 100 in which the injection means is a nozzle 2, and the second embodiment is a body floatation suppression device 100 in which the injection means is a gutter 3. . Since these two embodiments have the same basic structure, the common structure will be described in the first embodiment.

<First Embodiment> A body lift suppressing device 100 according to a first embodiment will be described with reference to FIG. FIG. 1 is a diagram for explaining a body lift suppressing device 100 according to the first embodiment, and FIG.
1 shown in FIG. 1 from the side in the transport direction (arrow a)
(B) is a diagram showing the present embodiment from the front side in the transport direction of the body 9.

A body floating suppressing device 10 shown in FIG. 1 (a).
0 is along the conveyor 8 that conveys the hanger 81 on which the body 9 is mounted, and is the processing tank 1 filled with the processing liquid L.
It is located on the entry side of 0. The reserve tank 1 arranged at a position higher than the transported body 9 stores the same processing liquid as the processing liquid L. Of course, reserve tank 1
The position is not limited and may be the floor surface, but in this embodiment, the reserve tank 1 is arranged at a high position and the potential energy is used to inject the processing liquid L.

The processing liquid stored in the reserve tank 1 is processed by the pump 6 installed in the processing tank 10 in the processing tank 10.
The processing liquid sucked from the inside and sent through the pumping pipe 61 is the same processing liquid as the processing liquid in the processing tank 10. By using this same processing liquid L,
The secondary effect of circulating the treatment liquid L in the treatment tank 10 and assisting its stirring can be obtained. The reserve tank 1 is provided with a nozzle 2 as an injection means connected by a pipe.
Is provided, and the processing liquid L is injected into the body 9 from the tip of the nozzle 2. The form of the nozzle 2 is also not particularly limited, and the tip thereof may be expanded or branched, and it is preferable that the treatment liquid L can be injected into the body 9 promptly and in good balance. .

Further, the tip of the nozzle 2 is connected to the body 9
It is preferable that the dash panel connected to the front fender and the front floor panel are provided so as to face the vicinity thereof. This is because generation of the buoyancy acting on the body 9 by the treatment liquid L entering this portion can be prevented, and the floating of the body 9 can be suppressed. However, since the body 9 enters the processing tank 10 with an inclination, even if the nozzle 2 is facing the rear floor panel, the injected processing liquid L flows into the portion where the dash panel and the front floor panel are in contact with each other. Although it can be said that the result is the same, considering the time required for this inflow,
In order to quickly immerse the body 9 in the bath,
It is preferable to direct the tip of the nozzle 2 to a portion where the dash panel and the front floor panel are in contact with each other and inject the treatment liquid L into this portion as in this embodiment. The limit switch 4 functions as a detecting means for detecting the injection timing of the nozzle 2. The limit switch 4 detects the seated position of the conveyed body 9.

A valve 5 provided between the reserve tank 1 and the nozzle 2 regulates the amount of the processing liquid L injected at the detected timing. The valve 5 controls the supply of the processing liquid L from the reserve tank 1 to the nozzle 2. Therefore, the valve 5 may be any valve that can adjust the flow rate of the processing liquid L, and may be the valve 5 whose flow path diameter can be adjusted, or the valve valve 5 which can be opened and closed according to the flow rate. Good.

A body floating suppressing device 10 having the above structure.
The operation of 0 will be described. The body 9 to be processed is the conveyor 8
When it is conveyed by the approaching processing tank 10 (see FIG. 1).
(See (a)), the limit switch 4 finely detects the position of the body 9. The limit switch 4 of the present embodiment recognizes the timing immediately before the front nose portion of the body 9 comes into contact with the processing liquid L as the injection timing, and detects this timing. Specifically, the limit switch 4 is a timer
After the body 9 has passed the predetermined position, the injection timing is after a predetermined time has elapsed. Limit switch 4
Detects the injection timing, the valve 5 is opened according to the detected injection timing. Valve 5
Is opened, the treatment liquid L stored in the reserve tank 1 is supplied to the nozzle 2.

The valve 5 of the present embodiment has a predetermined flow passage diameter in accordance with the vehicle type, the structure, the weight, etc. of the body 9 and the flow rate set corresponding to the degree of floating of the processing liquid L with respect to the specific gravity. The flow path is opened for the time of, and the flow rate of the inflowing processing liquid L is adjusted.

Thus, a predetermined amount of the processing liquid L is injected into the body 9 (see FIG. 1 (b)). Specifically, 100 to 500 liters of the processing liquid L is used.
It is preferable that the inflow is within seconds. This is, depending on the degree of floating of the body 9, 100 liters if the body 9 has a low degree of floating, 200 liters to 300 liters if the body 9 has an average degree of floating, and the body 9 that easily floats or is transported. 40 on high speed lines where speed is high
The inflow rate was set empirically with 0 to 500 liters as an index, and 400 liters were injected in 10 seconds in this example.

The pouring speed and pouring time are preferably determined according to the conveying speed of the conveyor 8. However, from the viewpoint of canceling the buoyancy, it is preferable that this injection is performed at a timing when the body 9 enters the tank, and a predetermined amount of the processing liquid L is performed at once in a short time. Therefore, the injection is performed for a short time at the timing when the body 9 starts the bath,
That is, it is preferable that the movement of the body 9 is performed within a predetermined distance. The conveyor 8 of this embodiment is 0.1
Since the body 9 is transported at a speed of m / sec, the injection time was set to 10 seconds in order to perform the injection in the transportation at a distance of 1 m.
Of course, this time is preferably set appropriately, and a slightly longer time (15 seconds) may be set. Further, when the conveyor 8 operates at an ultra high speed (8 m / min or more), it becomes difficult to secure the injection time. Therefore, it is preferable that the nozzle 2 be thick or the opening be large. In addition, by providing a mechanism for synchronously driving the nozzle 2 with respect to the body 9, it is possible to slow the relative speed and inject a predetermined amount of the processing liquid L within a predetermined moving distance. This injection is
It is performed through the nozzle 2 extending from the side window of the body 9 into the body chamber. Since the tip of the nozzle 2 is directed to the part where the dash panel and the front floor panel are in contact with each other, the treatment liquid L is collected in the part where the tip of the nozzle 2 is directed. This injected processing liquid L
The own weight of the body 9 added with weight resists the buoyancy, and the body 9 is prevented from being lifted. Further, since the treatment liquid L is injected from the side window of the body 9 through the nozzle 2 inserted into the body chamber, the treatment liquid L does not adhere to the outer plate of the body 9. Therefore, it is possible to prevent the occurrence of a defect such as deterioration of the appearance quality caused by splashing or dripping of the treatment liquid L or generation of bubbles.

When the injection of the predetermined amount of the processing liquid L is completed, the valve 5 is closed and the supply of the processing liquid L from the reserve tank 1 to the nozzle 2 is stopped. Along with this, the injection of the processing liquid L from the nozzle 2 into the body 9 is also stopped. The body 9 into which the treatment liquid L has been injected is quickly submerged in the treatment liquid L and is conveyed while being immersed therein. Following this, the body 9 connected to the body 9 is conveyed, approaches the processing tank 10, and the above-described operation is repeated. In this way, the pump 6 continuously sucks the processing liquid L from the processing tank 10 and continuously sends it to the reserve tank 1 for the bodies 9 that are successively conveyed. Since the reserve tank 1 has supplied the stored processing liquid L toward the body 9, the internal volume of the processing liquid L is decreasing. The pump 6 is the processing liquid L in this reserve tank 1.
To replenish. On the other hand, since the pump 6 continuously pumps up the processing liquid L, a necessary amount of the processing liquid L is stored in the reserve tank 1.
Is stored. It is the float switch 8 that detects the liquid amount in the reserve tank 1.
When the required amount is detected, the reserve tank 1 and the processing tank 10
The processing liquid L in the reserve tank 1 is returned to the processing tank 10 by using the overflow pipe 7 that communicates with the processing tank 10. Of course, without providing the float switch 7, the overflow pipe 7 may be provided at a predetermined water level (liquid height), and when the water level is reached, the processing liquid L may be returned to the processing tank 10.

As described above, the pump 6 and the overflow pipe 7 form a circulation path for the processing liquid L between the processing tank 10 and the reserve tank 1, and the processing liquid L is constantly stirred. Body floating suppression device 100
Supports the stirring of the treatment liquid L while suppressing the floating of the body. Since the treatment liquid L that has been sufficiently agitated does not cause sedimentation of the contents such as the electrodeposition coating material, it is possible to prevent problems (bugs) caused by the adhesion of these to the body 9.

According to the first embodiment, the processing liquid L is injected into the body according to the degree of floating of the body 9, and the floating when the body 9 enters the processing liquid L can be suppressed. it can. Therefore, even when the types of bodies 9 carried by the same conveyor 8 are different (the degree of floating is different), the body 9 of each body 9 can be provided without providing a special device for each of the conveyor 8 and the hanger 81. Floating can be suppressed appropriately.

<Second Embodiment> Next, a body lift suppressing device 200 of a second embodiment will be described. Compared with the body floatation suppressing device 100 of the first embodiment described above, in the first embodiment, the injection means is the nozzle 2, and the treatment liquid L is injected through the side window. In the body floatation suppressing device 200 of this embodiment, the injection means is the gutter 3, and the processing liquid L is injected through the front window.

Except for this point, the function of the limit switch 4 for adjusting the injection timing, the function of the valve 5 for adjusting the supply of the processing liquid L stored in the reserve tank 1, and the processing liquid L from the processing tank 10 to the reserve tank 1. Pumping valve 5
And the function of the overflow pipe 7 for returning the processing liquid L from the reserve tank 1 to the processing tank 10 are basically the same. Here, overlapping description will be omitted, and different points will be mainly described.

Now, the configuration of this embodiment will be described with reference to FIG. FIG. 2A is a view showing the present embodiment from the side surface side in the carrying direction of the body, and FIG. 1B is a view showing the present embodiment from the front side in the carrying direction of the body. In this example,
A gutter 3 for guiding the processing liquid L supplied from the reserve tank 1 to the front window of the body 9 is provided. This gutter 3
Are provided on the hangers 81 of the conveyor 8 on which the body 9 is mounted, and thus move as the hangers 81 are conveyed.

Further, this gutter 3 is a three-stage gutter 31, 32,
It is composed of 33. The first stage gutter 31 to which the processing liquid L is first supplied from the reserve tank 1 is a hanger 81.
Is provided along the transport direction (indicated by the arrow a in FIG. 2B). The reason that the first-stage gutter 31 is provided along the carrying direction is that the sufficient amount of the processing liquid L is supplied from the position-fixed reserve tank 1 while moving with the hanger 81. Therefore, the supply point from the reserve tank 1 is gutter 3
The gutter 31 can be supplied with a necessary amount of the processing liquid L until the rear end of the gutter 31 passes after the leading end of the gutter 1 passes. Further, since this gutter 31 is along the carrying direction, it is inclined along the carrying direction as it enters the processing tank 10. Therefore, the processing liquid L received in the gutter 31 flows into the second-stage gutter 32. The second-stage gutter 32 is provided along the front window of the body 9 in a direction substantially orthogonal to the transport direction. The processing liquid L that has flowed from the first-stage gutter flows through the second-stage gutter 32 into the third-stage gutter 33 that is inserted into the body from the front window of the body 9. The third stage gutter 33 injects the treatment liquid L into the body. The treatment liquid L injected from the front window of the body 9 immediately flows into a portion where the dash panel and the front floor panel are in contact with each other, and suppresses the buoyancy acting on the body 9 and suppresses the floating of the body 9.

The body weight of the body 9 in this embodiment is about 350 kg, and the maximum buoyancy acting on it is 700.
It is kg. Therefore, in order to suppress the floating of the body 9, about 350 kg of the processing liquid L is allowed to flow into the chamber of the body 9. This buoyancy was calculated based on the space inside the body 9. The injection of the treatment liquid L was such that 700 kg of the treatment liquid L was injected in about 0.7 minutes. As a result, body 9
Was able to be rapidly immersed in the treatment liquid L without floating in the treatment tank 10.

By the way, the reserve tank 1 of this embodiment stores 1 t of the treatment liquid L, and 700 kg of the treatment liquid L is injected at once in a predetermined time (for example, within 10 seconds).

Next, the body floating suppressing device 2 of this embodiment.
The operation of 00 will be described with reference to FIG. FIG. 3 shows the body 9 conveyed by the conveyor 8. Here, the body 9 is conveyed along the conveyance direction (arrow b).
Is shown with the passage of time.

In FIG. 3, from the right hand, a body 9-1 is conveyed for processing, a body 9-2 is to be put into the processing tank 10, a body 9-3 is to be submerged in the processing liquid L, and a processing is performed. The body 9-4 completely immersed in the liquid L is shown. The point here is the timing of injecting the processing liquid L into the body 9. The timing of injecting the processing liquid L in this embodiment is the timing at which the body 9-2 enters the processing tank 1. In this embodiment, as shown in FIG. 3, the position of the inlet portion of the processing bath 10 provided along the transport direction of the body 9 (arrow b), in other words, the position of the vertical portion q where the wall of the processing bath 10 has a large inclination. The reserve tank 1 is provided above the tank, and the treatment liquid L is injected in the vicinity of this area.

Now, when the limit switch 4 detects the timing when the body 9 is seated at the position of the body 9-2,
Since the valve 5 (not shown) opens the flow path, the reserve tank 1 supplies the processing liquid L to the first gutter 31. In the vertical portion q of the processing tank 10, the hanger 81 takes the posture of entering the tank, and the gutter 31 of the first stage is inclined along the transport direction (b). Therefore, the processing liquid L supplied from the reserve tank 1 flows into the second-stage gutter 32, and is further injected into the body 9 through the third-stage gutter having the injection port facing the inside of the body. . Treatment liquid L injected into the body 9
Flows to the joint between the dashboard and the front floor panel, and the weight of the body 9-3 guides the body 9-3 toward the bottom of the processing tank 10.

In this way, the processing liquid L in the processing tank 10 flows into the body 9 whose floating is suppressed at the timing of entering the tank, and the body 9 gradually sinks to the bottom surface of the processing tank 10.
In this way, the treatment is performed in the state where the body 9-4 is completely submerged and immersed in the treatment liquid L.

As described above, the body floatation suppressing device 200 according to the second embodiment operates in the same manner as the body floatation suppressing device 100 according to the first embodiment, and the treatment liquid L depends on the degree of the body 9 floating. Can be injected into the body, and floating when the body 9 enters the processing liquid L can be suppressed, and similar effects can be obtained.

In addition, although the invention according to the present application has been specifically described in detail here by taking the body lifting suppression devices 100 and 200 according to the two embodiments as examples, the body lifting suppression method according to the present application is It can also be implemented in two devices, and has the same operation and effect.

The embodiments described above are described for facilitating the understanding of the present invention, and not for limiting the present invention. Therefore, each element disclosed in the above-described embodiment is intended to include all design changes and equivalents within the technical scope of the present invention.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a body floating suppressing device according to a first embodiment, and FIG. 1 (a) is a diagram showing this embodiment from a side surface side in a carrying direction of a body; FIG. 1B is a diagram showing the present embodiment from the front side in the carrying direction of the body.

FIG. 2 is a view for explaining a body floating suppressing device according to a second embodiment, and FIG. 2 (a) is a view showing the present embodiment from the side surface side in the carrying direction of the body; FIG. 1B is a diagram showing the present embodiment from the front side in the carrying direction of the body.

FIG. 3 is a diagram for explaining the operation of the body lift suppressing device according to the second embodiment.

[Explanation of symbols]

100, 200 ... Body floating suppression device 1 ... Reserve tank 2 ... Nozzle, injection means 3, 31, 32, 33 ... Gutter, injection means 4 ... Limit switch, injection timing detection means 5 ... Valve 6 ... Pump 61 ... Pumping pipe 7… Overflow piping 8 ... Conveyor 81 ... Hanger 9 ... Body 10 ... Treatment tank L ... Treatment liquid

Continued front page    (72) Inventor Hiroyuki Hashimoto             Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan             Inside the automobile corporation (72) Inventor Yasuo Takamizu             2-6-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Stocks             In-house company F-term (reference) 4D075 AB03 AB12 AB34 AB38 CA47                       DA23 DB02 DC12                 4F040 AA13 AB04 AC02 BA47 CC01                       DA07 DA20 DB30

Claims (10)

[Claims] 1. When a body mounted on a hanger that is suspended and conveyed by a conveyor rail enters a treatment tank filled with a pretreatment liquid or a treatment liquid containing an electrodeposition paint, the body is placed in the treatment tank. A method for suppressing body floating, in which the same treatment liquid as the above-mentioned treatment liquid is injected. 2. The body floating suppressing method according to claim 1, wherein the treatment liquid is injected into the body from a side window of the body into which the treatment liquid is introduced via a nozzle. 3. The body floating suppressing method according to claim 1, wherein the treatment liquid is injected into the body from a front window of the body to be bathed through a gutter provided in the hanger. 4. A treatment liquid of 100 liters to 500 liters is injected into the body within 10 seconds.
The body floating suppression method described. 5. A tank for storing the same treatment liquid as a treatment liquid in which a body mounted on a hanger which is suspended and conveyed by a conveyor rail is immersed, and the body which is placed in a treatment tank filled with the treatment liquid. An injection unit for injecting the processing liquid supplied from the tank into the inside of the container, a detection unit for detecting the injection timing of the processing liquid by the injection unit, and the detection unit provided between the tank and the injection unit. And a valve for adjusting the supply of the processing liquid from the tank to the injecting means according to the injecting timing detected by the means. 6. The body floatation suppression device according to claim 5, wherein the injection means is a nozzle, and the nozzle injects the processing liquid into the inside of the body from a side window of the body. 7. The body floating suppressing device according to claim 5, wherein the injection means is a gutter, and the gutter is provided on the hanger and injects the treatment liquid into the inside of the body from a front window of the body. . 8. The injection means comprises 100 liter to 500 liters.
The body floating suppressing device according to claim 5, wherein a liter of the processing liquid is injected into the body within 10 seconds. 9. The body floating suppressing device according to claim 5, further comprising a pump that sucks the processing liquid from the processing tank and sends the processing liquid to the tank. 10. The body floating suppressing device according to claim 9, wherein the tank is provided with an overflow pipe for sending the processing liquid to the processing tank.