JPH09195758A - Liquid agent applying method on inner circumferential face of outer cylinder of metal support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with electric control so as to simplify a device by supplying a liquid agent to an application head by gravity so as to apply the liquid agent on the inner circumferential face of an outer cylinder of metal support by an application means, and setting the position of the application means higher than the liquid surface of the liquid agent in a vessel at non-applying. SOLUTION: When a diffusion preventing agent is applied on the inner circumferential face of an outer cylinder 6 of metal support, by letting fall a lever 42 forward, an application head 2 is moved forward by a link 4, and hence the application head 2 is inserted and arranged in the outer cylinder 6. At this time, a plate part 50 is pulled by an arm 54, and the one side is contacted with an eccentric cam 11. Under this condition, the felt 20 of the application head 2 is contacted with the inner circumferential face of the outer cylinder 6, an arm 32 is in the vertical condition, the liquid surface of the diffusion preventing agent in a storage tank 3 is positioned over the application head 2, and hence the diffusion preventing agent flows in a flexible tube 21 so as to be supplied to the application head 2 for applying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid carrier such as a diffusion inhibitor on the inner peripheral surface of an outer cylinder of a metal carrier used for an exhaust gas purifying catalyst and comprising a honeycomb body and an outer cylinder containing and holding the honeycomb body. To a method of applying.

[0002]

2. Description of the Related Art A metal carrier used for an exhaust gas purifying catalyst comprises a honeycomb body formed by alternately laminating corrugated plates and flat plates, and an outer cylinder for housing and holding the honeycomb body. The honeycomb body and the outer cylinder need to be joined together to prevent relative movement in the axial direction of each other.
Further, since the honeycomb body and the outer cylinder have different thermal expansion coefficients,
The honeycomb body may be damaged by thermal stress during use. Therefore, only one end of the outer cylinder is joined to form a cantilever,
It is also attempted to prevent damage to the honeycomb body by increasing the degree of freedom of thermal expansion of the honeycomb body.

By the way, brazing or diffusion bonding is generally used for joining the honeycomb body and the outer cylinder. In the case of brazing, the brazing material is applied to the portion to be joined on the inner peripheral surface of the outer cylinder. Need to be applied. Also in the case of diffusion bonding, in order to perform cantilever bonding as described above, it is necessary to apply a diffusion inhibitor to the inner peripheral surface of the portion of the outer cylinder where the bonding with the honeycomb body should be avoided.

To apply a liquid agent such as a brazing material or a diffusion preventive agent to the inner peripheral surface of the outer cylinder, it has been conventionally performed manually with a brush as shown in FIG. However, it is difficult to say that the work of holding a large outer cylinder in a hand and applying it while rotating it is difficult, and the large number of man-hours hinders mass production. Further, it takes skill for the worker to be able to apply uniformly and accurately, and until then, there are problems that uneven application occurs, the accuracy of the application position is low, and the defect rate is high. Furthermore, the diffusion inhibitor is supplied as a solution dissolved in an organic solvent, and the brush is impregnated with the solution with the lid of the container removed to apply the solution, so the concentration changes due to volatilization of the solvent and the application amount is uneven. It is easy to become. There is also a problem of environmental pollution due to volatilization of the organic solvent.

It is also possible to use a robot or the like for automation. However, when a robot is used, most of the above problems can be solved by the teaching of a skilled person, but there is a problem that a large investment is required for equipment.

[0006]

Therefore, it is possible to apply a liquid agent by automatically supplying it from the container to the coating head by using a coating device composed of a container for the liquid agent and a coating head and sealing the portion other than the coating portion of the coating head in a sealed state. Conceivable. By using such a coating device, volatilization of the organic solvent is prevented, so that problems of concentration fluctuation and environmental pollution are avoided. If the coating is performed by the coating head while mechanically rotating the outer cylinder, the equipment investment is small and the man-hour can be greatly reduced as compared with the robot and the mass production is possible.

However, even if such a coating device is used, if the liquid agent is supplied to the coating head at the time of non-coating such as when the outer cylinder is replaced, there is a problem that the liquid drip from the coating head occurs. Therefore, it is necessary to perform electrical control so as to stop the supply of the liquid agent at the time of non-application, which also requires a large investment in equipment. The present invention has been made in view of such circumstances, does not require expensive investment,
The purpose is to reliably prevent dripping and to enable stable application in a closed system.

[0008]

The feature of the method for applying a liquid agent to the inner peripheral surface of the outer casing of the metal carrier of the present invention which solves the above-mentioned problems is that the application is performed by a coating head having a coating means and a container for storing the liquid agent. The vertical position of the head and the container can be adjusted, and the coating material is supplied to the coating head by gravity and the coating material is applied to the inner peripheral surface of the outer cylinder of the metal carrier by the coating means. Is lower than the liquid level of the liquid agent in the container, and the position of the coating means is higher than the liquid level of the liquid agent in the container when not coated.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for applying a liquid agent on the inner peripheral surface of an outer cylinder of a metal carrier according to the present invention, the position of the applying means of the application head is lower than the liquid level of the liquid agent in the container during application. As a result, the liquid agent is smoothly supplied from the container toward the application head by gravity, and for example, the liquid agent is applied to the inner peripheral surface of the outer cylinder by rotating the outer cylinder in a state where the applying means is in contact with the inner peripheral surface of the outer cylinder. It

On the other hand, at the time of non-application, the position of the application means is set higher than the liquid surface of the liquid agent in the container. Therefore, the liquid agent flows from the application head toward the container due to gravity, so that the supply of the liquid agent to the application head is stopped and there is no problem such as dripping. That is, in the coating method of the present invention, since the supply and the stop of the liquid agent are controlled by gravity, it is possible to perform the coating with a simple device without the need for electrical control.

As a coating apparatus capable of easily performing such a coating method, a coating head having coating means,
It is possible to use a container including a container for storing a liquid agent and being connected to the coating head to supply the liquid agent to the coating head, and an adjusting unit for adjusting the relative position of the coating head and the container in the vertical direction. As the application means, a liquid agent outflow means including a slit or a through hole, a liquid agent spraying means such as a spray, or a liquid agent transfer means including a porous body such as felt can be adopted. Further, as the adjusting means, the vertical position of the coating head and the container may be adjusted manually or by an actuator, or the vertical position of the other can be adjusted by adjusting the vertical position of one by using a link mechanism. It is also preferable to be able to adjust both at the same time. It is also possible to adjust only the vertical position of either the coating head or the container.

In particular, if the upper and lower positions of the coating head and the container are adjusted so that the upper and lower positions of the other can be adjusted at the same time, the movement distance due to the adjustment of the upper and lower positions can be reduced, and the space required for arrangement can be reduced. It is advantageous. Further, if the link mechanism is used for this operation, the other can be adjusted by adjusting only the position of one, so that the number of drive sources is small and the device can be further simplified.

[0013]

The present invention will be described below in detail with reference to examples. 1 to 3 show a coating apparatus used in one embodiment of the present invention. This coating apparatus includes a base 1, a coating head 2, a storage tank 3, a first link 4 for moving the coating head 2 up and down, and a second link 5 for moving the storage tank 3 up and down. .

The coating head 2 has a cylindrical shape having a predetermined length, and a felt 20 is attached to the lower surface of the outer peripheral surface. The application head 2 is attached to the portion where the felt 20 is attached.
Is formed with a plurality of through holes (not shown) that communicate the inside and the outside of the coating head 2, and the felt 20 is impregnated with the liquid agent in the coating head 2 through the through holes. One end of the coating head 2 is sealed, and the flexible tube 21 is fixed to the other end and connected to the storage tank 3.

The coating head 2 is held on the base 1 via a parallelogram-shaped first link 4. The first link 4 includes a bottom portion 40 fixed to the base 1, a left side portion 41 rotatably supported at one end of the bottom portion 40, and a bottom portion 40.
A lever 42 pivotally supported at the other end of the
1 and the upper side portion 43 pivotally supported at the intermediate portion of the lever 42, respectively, and the lever 42 is swung in the arrow direction of FIG. 1 about a pivot point P of the bottom side portion 40. By doing so, the upper side portion 43 is configured to perform an arc motion while maintaining a horizontal state. The application head 2 is horizontally fixed to the other end of the left side portion 41, and the lever 4
By swinging 2, the coating head 2 is configured to perform an arc motion together with the left side portion 41 while maintaining a horizontal state.

The storage tank 3 is fixed to a tubular portion 30 which is slidably held up and down on a support rod 10 which extends vertically from the base 1, and a flexible tube 21 is connected to a lower end thereof via a valve 31. . A diffusion inhibitor as an organic solvent solution is stored in the storage tank 3, and the diffusion inhibitor adjusted to an arbitrary supply amount by the valve 31 is gravity-fed to the coating head 2 through the flexible tube 21. ing.

A first arm 32 is rotatably supported by the tubular portion 30, and the other end of the first arm 32 is held by the base 1 via a triangular second link 5. Second link 5
The first corner 51 is rotatably supported on the base 1 by the second
The triangular plate portion 50 in which the first arm 32 is pivotally supported by the corner portion 52, and one end is rotatably supported by the remaining third corner portion 53 of the plate portion 50 and the other end is rotated by the coating head 2. The second arm 54 is rotatably supported. When the swinging movement of the lever 42 is transmitted to the second arm 54, the plate portion 5
0 swings around the pivot point Q of the corner portion 51, and the swinging motion is converted into a linear motion by the first arm 32 so that the tubular portion 30 and the storage tank 3 move up and down. There is.

An eccentric cam 11 is rotatably held on the base 1, and the eccentric cam 11 abuts on one side of the plate portion 50 to prevent further swinging of the plate portion 50. A method for applying the diffusion preventive agent to the inner peripheral surface of the one end portion of the outer cylinder of the metal carrier by using the application device configured as described above will be described below. First, the outer tube 6 of the metal carrier is attached to a rotary drive device (not shown) so that its axis is horizontal.
The outer cylinder 6 is defined such that the diffusion preventing agent is applied to the inner peripheral surface within a range of 63 ± 2 mm from one end surface.

When the lever 42 is swung about the pivot point P and tilted forward, the coating head 2 is moved forward by the first link 4, whereby the coating head 2 is moved to the outer cylinder 6.
Is inserted and arranged from one end surface of the inside. At this time, the plate portion 50 is pulled by the second arm 54 and swings around the pivot point Q, and the third corner portion 53 comes to the front position, and one side of the plate portion 50 contacts the eccentric cam 11. As a result, the movement of the lever 42 and the first link 4 is restricted, and the coating head 2 stops at a predetermined position inside the outer cylinder 6.

In this state, as shown in FIG. 1, the felt 20 of the coating head 2 contacts the inner peripheral surface of the outer cylinder 6, and the distance between the felt 20 and the base 1 becomes H1 as shown in FIG. ing. Further, the first arm 32 is in the vertical state, and the plate portion 5
Since the straight line connecting the first corner 51 and the second corner 52 of 0 is also in the vertical state, the distance between the liquid level of the diffusion preventive agent in the storage tank 3 and the base 1 is as shown in FIG. It is H2.

Since H2> H1 is established here, the diffusion preventive agent in the storage tank 3 flows in the flexible tube 21 by gravity and is supplied to the coating head 2 to seep out from the felt 20 and to the outside. By the rotation driving of the cylinder 6, the inner peripheral surface of the outer cylinder 6 is coated with a width corresponding to the length of the felt 20. After application for a predetermined time or a predetermined number of rotations of the outer cylinder 6, the lever 42 is manually pulled backward. Then, in the first link 4, the upper side portion 43 moves backward in an arc shape while being lifted upward, and the coating head 2 also moves in the same manner to separate from the inner peripheral surface of the outer cylinder 6 and from the one end surface of the outer cylinder 6. After going out, the state shown in FIG. 3 is obtained. This movement is the first link 4
Will be regulated when it becomes difficult to move. At this time, the distance between the felt 20 and the base 1 is H3 as shown in FIG.

On the other hand, in the second link 5, the second arm 54
The rearward movement causes the plate portion 50 to swing rearward around the pivot point Q of the first corner portion 51, and the second corner portion 52 moves downward in an arc shape. As a result, the first arm 32 is pulled downward, and the tubular portion 30 slides downward, so that the storage tank 3 lowers downward. When the movement of the first link 4 becomes difficult, the distance between the liquid level of the diffusion preventing agent in the storage tank 3 and the base 1 becomes H4 as shown in FIG.

Since H3> H4 is established here, the diffusion preventive agent in the storage tank 3 does not flow in the flexible tube 21 and the diffusion preventive agent does not drip from the felt 20. . Then, the outer cylinder 6 coated with the diffusion inhibitor is removed, and the next outer cylinder 6 is similarly coated. That is, according to the coating method of the present embodiment, since the supply of the diffusion preventive agent is stopped when the outer cylinder 6 is replaced, the dripping from the coating head 2 is reliably prevented. The diffusion preventing agent in the storage tank 3 is in a sealed state, and the diffusion preventing agent in the system does not come into contact with air because of the felt 20.
Since it is only the surface of, the environmental pollution due to the volatilization of the organic solvent is slight. Further, the coating state and the non-coating state of the coating head 2 can be switched simply by operating the lever 42, and the operation is extremely easy. Furthermore, since the contact pressure between the felt 20 and the inner peripheral surface of the outer cylinder 6 can be kept constant,
The applied amount can be easily stabilized. Therefore, it is possible to perform a high-quality and stable coating work even by a worker who is not skilled in the work, and to significantly reduce the number of steps.

Therefore, according to the above-mentioned effects, according to the coating method of the present embodiment, the working time required for coating is about 1/10 of the conventional one, and the precision of the coating amount and the coating width is remarkably improved. According to the coating apparatus used in this example, the first
Since the apparatus can be made compact by using the link 4 and the second link 5 and the movement amount of the coating head 2 and the storage tank 3 is small, it is also advantageous in terms of arrangement space.

[0025]

[Effects of the Invention] That is, according to the method of applying a liquid agent on the inner peripheral surface of the outer casing of a metal carrier of the present invention, it is possible to reliably prevent liquid dripping and stably apply a liquid in a closed system without requiring an expensive investment. be able to.

[Brief description of the drawings]

FIG. 1 is a front view at a coating position of a coating device used in an embodiment of the present invention.

FIG. 2 is a side view at a coating position of a coating device used in one embodiment of the present invention.

FIG. 3 is a front view of a coating apparatus used in an embodiment of the present invention in a non-coating position.

FIG. 4 is a schematic front view at a coating position of a coating device used in one embodiment of the present invention.

FIG. 5 is a schematic front view of a coating device used in one embodiment of the present invention in a non-coating position.

FIG. 6 is an explanatory diagram showing a conventional coating method.

[Explanation of symbols]

1: Base 2: Coating head 3: Storage tank (container) 4: First link 5: Second link 6: Outer cylinder 20: Felt (coating means) 21: Flexible tube

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Gou Yamauchi 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation (72) Inventor Atsuhiko Kanda 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Satoru Akino 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation (72) Inventor, Mamoru Okamoto, 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation

Claims (1)

[Claims] 1. A coating head comprising a coating means having a coating means and a container for storing a liquid agent, wherein the relative position of the coating head and the container in the vertical direction can be adjusted, and the liquid agent is supplied to the coating head by gravity to carry out the coating. Means for applying the liquid agent to the inner peripheral surface of the outer cylinder of the metal carrier by means of the means, the position of the applying means is lower than the liquid surface of the liquid agent in the container during application, and the position of the applying means when not applying. Is higher than the liquid surface of the liquid agent in the container, a method for applying the liquid agent to the inner peripheral surface of the outer cylinder of the metal carrier.