JPH0373235A - Assembling device of catalytic converter for vehicle - Google Patents

Abstract

PURPOSE:To facilitate positioning of a flange to a casing by installing the second holding means which is supported on a supporting plate so that it can move to approach to and separate from the first holding means where the flange to be welded to one end of the casing is positioned for holding at an opposing position to the first holding means. CONSTITUTION:Flanges 13a, 13b are positioned for holding respectively on a first and second holding means 6 with a swivel base 3 placed at an installing location and the second holding means 6 separated from a first holding means 5. Next, when the second holding means 6 is moved to approach the first holding means 5 in such a condition as a casing 11 whose one end is fitted with the flange held with the first holding means 5 is clamped with a clamp means 7, the flange comes into fit with both the ends of the casing at prescribed relative locations respectively. The angle of a base unit 2 is changed to an approximately perpendicular axis line, and the swivel base 3 is moved to a welding location to weld the flanges 13a, 13b to both the edges of the casing 11 in turn.

Description

Detailed Description of the Invention A1 Object of the Invention (1) Industrial Field of Application The present invention relates to a vehicle comprising a casing that houses a catalyst and is basically formed into a cylindrical shape, and flanges are welded to both ends of the casing. The present invention relates to an assembly device for a catalytic converter.

(2) Prior Art Conventionally, in such a vehicle catalytic converter, flanges are generally welded and connected to both ends of a casing filled with a catalyst manually by a welding worker.

(3) Problems to be Solved by the Invention By the way, the flanges at both ends of the casing in a vehicle catalytic converter may be connected to the casing with their mutual axes shifted due to restrictions due to the mounting position on the vehicle, or the flanges may be connected to the casing with their axes shifted relative to each other. The positions of the flanges may be shifted from each other, and the work of welding the flanges to the casing not only requires skill but also requires complicated positioning, resulting in poor workability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an assembly device for a catalytic converter for a vehicle, which facilitates the positioning of the flange to the casing at least when welding the flange to the casing, thereby improving workability. purpose.

B0 Structure of the Invention (1) Means for Solving the Problems The device according to the first feature of the present invention includes a support base arranged at a fixed position and around which a mounting position and a welding position are set; The mounting includes a base supported on the support base so as to be movable in the circumferential direction between positions corresponding to positions and welding positions, and capable of angular displacement around a vertical axis; a swivel base supported in a position to allow angular displacement about a horizontal axis; a support plate fixed to the swivel base; and a flange to be welded to one end of the casing on the support plate for positioning and holding the flange. A first holding means that is fixedly arranged and a flange to be welded to the other end of the casing are positioned and held, and the flange is moved toward and away from the first holding means at a position facing the first holding means. a second holding means supported on the support plate; and a clamp means provided on the support plate for detachably holding the casing with one end fitted to the flange held by the first holding means. Be prepared.

According to a second feature of the invention, the support plate is detachably fixed to the swivel base.

(2) Effect According to the configuration of the above first feature, when the swivel base is placed in the mounting position and the second holding means is separated from the first holding means, the first and second holding means When the second holding means is moved close to the first holding means with the casing having one end fitted to the flange held by the first holding means being clamped by the clamping means, the casing is moved close to the first holding means. The flanges are fitted to both ends at predetermined relative positions. Therefore, the base is angularly displaced around the vertical axis, the swivel table is moved to the welding position, one flange is welded to one end of the casing at the welding position, and then the swivel table is rotated 180 degrees to weld the other end of the casing. By welding the other flange to the casing, welding of the flange to both ends of the casing is completed. Therefore, the mounting is carried out by angularly displacing the base, moving the swivel base to the position, moving the second holding means in a direction away from the first holding means, and further releasing the clamped state by the clamping means. , the catalytic converter can be taken out after welding is completed.

Further, according to the configuration of the second feature, by replacing the support base in response to a change in the type of catalytic converter, the first 'J6, the second holding means, and the clamping means can be adjusted in response to a change in the type of catalytic converter. and can be replaced to accommodate multiple types of catalytic converter assemblies.

(3) Example Hereinafter, an example of the present invention will be explained with reference to the drawings. First, in FIGS. 1 and 2, this assembly device is
A support 1 disposed at a fixed position, a base 2 supported on the support 1 to allow angular displacement around a vertical axis, and a pivot supported on the base 2 such that it can be angularly displaced around a horizontal axis. a support plate 4 fixed to each swivel base 3.3;
4, a first holding means 5.5 fixedly arranged on each support plate 4.4, and a second holding means 5.5 supported on said support plates 4, 4 at a position opposite to the first holding means 5.5. The assembly device includes a holding means 6.6 and clamping means 7, 7 provided on the support plates 4, 4, and flanges 13a, 13b are welded to both ends of the casing 11 of the catalytic converter 10.

In FIGS. 3 and 4, the catalytic converter 10 is
As the exhaust gas flows through a pair of catalysts 12 and 12 that are interposed in the exhaust system of a vehicle internal combustion engine and housed in the casing 11, HCSC○ and NO in the exhaust gas are reduced.
It removes harmful components such as x by promoting oxidation and reduction reactions.

The casing 11 is basically formed into a cylindrical shape, and flanges 13a and 13b are welded to both ends of the casing 11 for joining to the middle of an exhaust pipe. The casing 11 is formed by welding together a pair of casing halves 11a and 11b that are divided into two along the axial direction over the entire length, and both casing halves 1
1a.

At both ends of Llb in the circumferential direction, there are joint flanges 14.1 that abut against each other.
5 are respectively provided, and the casing 11 is formed by abutting and welding their joining flanges 14 and 15. Moreover, both ends of the casing 11 are formed so as to become narrower toward the outside, and openings 16 and 17 are formed at the narrowest parts of both ends. It has a misaligned axis.

The catalyst 12 is formed in a cylindrical shape to allow gas flow, and a peripheral surface protection member 18.18 and a seal member 19.1 are provided between the catalyst 12.12 and the casing 11.
9 is interposed. The peripheral surface protection member 18 is formed into a ring shape by knitting fine wires made of stainless steel into a mesh shape, for example, and serves to prevent the catalyst 12 from being destroyed by vibration. Further, the seal member 19 is formed in a ring shape and functions to prevent gas from flowing between the catalyst 12 and the casing 11.

By the way, the flanges 13a and 13b are formed in a substantially pentagonal shape, and are designed to be connected to an exhaust pipe, for example, with a pentagonal shape.
A bolt 20 is installed in each flange 13a, 13b.

The support stand 1 includes a substrate 21 fixed on the floor, and the substrate 2
A bottomed cylindrical support tube 22 stands vertically on top of the support base 1 with the closed end positioned upward, and around the support base 1,
For installation, positions P and l and welding position P are set. Thus, the mounting position P and the welding position P are set at symmetrical positions with respect to the support tube 22.

The base 2 is rotatably supported on the support cylinder 22 of the support base 1 about a vertical axis. That is, the base 2 is formed into a disk shape, and is rotatably supported on the closed end of the support cylinder 22 via a thrust bearing 30. Moreover, base 2
The base end of a rotary shaft 23 extending downward while having a vertical axis is fixed to the center of the lower surface of the support tube 22, and the rotary shaft 23 rotatably passes through the center of the closed end of the support tube 22. Moreover, the tip or lower end of the rotating shaft 23 is slidably fitted into a cylindrical bearing portion 24 provided on the substrate 21.

The rotating shaft 2 is used to rotate the base 2 around the vertical axis.
3 is connected to a base driving means 25, and this base driving means 25 includes a pinion 26 fixed to the middle part of the rotating shaft 23, a rack 27 that meshes with the pinion 26, and a rack 27 that is connected to the rack 27. It consists of a cylinder 28. The rack 27 is supported by the support cylinder 22 so as to be movable in a horizontal direction perpendicular to the axis of the rotating shaft 23, and a piston rod 28a of the cylinder 28 is connected to one end of the rack 27 protruding from the support cylinder 22. Thus, the cylinder 28 is connected to the substrate 21
It is supported with a horizontal axis by a support section 29 provided above.

Therefore, by telescoping the cylinder 28, the rotating shaft 23, that is, the base 2, rotates about the vertical axis.

On the base 2, a pair of support blocks 31.31 formed in a rectangular box shape are fixed adjacent to each other, and on these support blocks 31.31, the swivel bases 3, 3 are mounted around the horizontal axis. It is rotatably supported. That is, in both support blocks 31.31, rotary shafts 34.34 having axes on a horizontal straight line orthogonal to the rotational axis of the base 2 are rotatably supported via bearing members 32.33, respectively. A swivel base 3.3 is fixed to the projecting end of the rotary shaft 34, 34 from each support block 31.31. Therefore, when one of the swivel bases 3 is in a position corresponding to the mounting position PX,
The other rotating table 3 is at the welding position P.

It will be located at the position corresponding to .

A swivel drive means 35 35 is connected to the rotation shaft 34 , 34 in order to rotate each swivel 3 , 3 around a horizontal axis. , a rack 37 that meshes with the pinion 36 , and a cylinder 38 that is connected to the rack 37 . The rack 37 is supported by the support block 31 so as to be movable in the horizontal direction perpendicular to the axis of the rotating shaft 34, and the piston rod 3 of the cylinder 38 is attached to one end of the rack 37 protruding from the support block 31.
8a are connected. The cylinder 38 is supported by a support arm 39 connected to the support block 31 so as to have a horizontal axis.

Therefore, by telescoping the cylinder 38, the rotating shaft 34, that is, the swivel base 3, is rotated about the horizontal axis.

Each swivel table 3.3 is formed in the shape of a rectangular block, and each swivel table 3.3 is provided with four insertion holes 41 having an axis parallel to the rotating shaft 34. will be established. Support plates 4, 4 are removably fixed to each swivel base 3.3. That is, the support plate 4.4 has four mounting pins 42 protruding from each of the above-mentioned insertion holes 41. It is inserted into the hole 41... On the other hand, the swivel base 3.
3 is screwed with a screw member 43 that is movable in a direction perpendicular to each insertion hole 41 .
1... is installed by screwing the screw members 43... into the pins 42... respectively.
, 4 are fixed to the swivel base 3.3. Therefore, the screw member 43
... by loosening the support plate 4.4 to the swivel base 3.3.
It is possible to remove the support plate 4.4 from the swivel base 3.
It will be removably fixed at ゜3.

With reference to FIGS. 5 and 6, each support plate 4.4
A first holding means 5.sup.5 is fixedly disposed in the catalytic converter 1O, and is capable of positioning and holding the flange 13a to be welded to one end of the casing 11 of the catalytic converter IO. The first holding means 5 includes a plate 46, which is fixed to the upper end of an arm 45 extending outward from the lower part of the bracket 44 fixed to the support plate 4, and a flange on the plate 46. 1
3a includes a pair of clamp claws 47.47 that can be engaged and detached, and a cylinder 48.48 for driving the clamp claws 47.47 to engage and disengage.

The receiver plate 46 is provided with a positioning pin 49 that protrudes from the upper surface of the receiver plate 46, and three bolts 201 are installed in the flange 13a.・Can be inserted through 3
Two positioning holes 50 are bored, and the receiver is placed on the plate 46 by inserting the bolts 20 through each positioning hole 50 while fitting into the positioning pin 49. As a result, the flange 13a is positioned and placed on the plate 46.

The clamp claw 47.47 is mounted on the flange 13 on the plate 46.
The cylinder 48.48 is supported on the arm 45 with a horizontal axis.

Each support plate 4.4 also has a first holding means 5.5 at a position opposite to the first holding means 5.5 for positioning and holding the flange 13b to be welded to the other end of the casing 11. The second holding means 6, 6 are supported so as to be able to move toward and away from, that is, move up and down. This second holding means 6 has a proximal end supported by the bracket 44 so as to be movable up and down.
2, a pair of clamp claws 53, 53 that can be engaged with and detached from the flange 13b, the receiver of which is in contact with the lower surface of the plate 52;
It is provided with cylinders 54 and 54 for engaging and disengaging the clamp claws 53 and 53.

A pair of guide rods 55 extending vertically are provided at the base end of the arm 51.
．． The upper ends of 55 are fixed, and these guide rods 55.55 are connected to guide tubes 56 fixed to the bracket 44.
, 56 in a slidable manner. As a result, the arm 51 can be raised and lowered and supported by the bracket 44, that is, the support plate 4. Moreover, a cylinder 57 having an axis extending vertically is fixedly supported on the upper part of the bracket 44 between the guide rods 55, 55, and this cylinder 57 is connected to the arm 51. Therefore, the arm 51 moves up and down in response to the expansion and contraction of the cylinder 57.

The receiver plate 52 is provided with a positioning pin 58 protruding from the lower surface of the plate 52, and three bolts 20 installed in the flange 13b can be inserted therethrough.
Two positioning holes 59... are bored, and the bolts 20... are inserted into each positioning hole 59... while fitting into the positioning pin 58, so that the receiver comes into contact with the lower surface of the plate 52. By doing so, the flange 13b is positioned and brought into contact with the lower surface of the plate 52.

The clamp claws 53.53 are connected to the arm 51 so as to be able to engage and disengage from the flange 13b which is in contact with the lower surface of the plate 52.
The cylinder 54.54 is supported on the arm 51 with a horizontal axis.

Further, the bracket 44 is provided with clamp means 7, 7 for removably holding the casing 11 in a vertical position by fitting one end into the flange 13a held by the first holding means 5. This clamping means 7 has a flange 13a which is positioned and held by the first holding means 5.
A fixed clamp claw 60 is fixed to the bracket 44 so as to come into contact with one side of the outer periphery of the longitudinally intermediate portion of the casing 11 with one end fitted to the casing 11 from the side opposite to the fixed clamp claw 60. A swinging clamp claw 61 is swingably supported on the bracket 44 so as to be able to come into contact with the outer periphery of the intermediate bracket, and a cylinder 62 is supported by the bracket 44 while being connected to the swinging clamp claw 61.

According to the clamping means 7, the swinging clamp claw 61 swings in response to the expansion and contraction of the cylinder 62, thereby making it possible to switch between holding the casing 11 in a predetermined position and releasing the holding state.

By the way, the first and second holding means 5.6 and the clamping means 7 move the swivel table 3 in the direction in which the axes of the openings 16.17 at both ends of the casing 11 in the catalytic converter 10 are shifted (the left-right direction in FIG. 4). Both flanges 13a, 13b and the casing 11
is set to hold.

In addition, at the welding position Px, the welding joint position of the flange 13a and the casing 11, which are in the lower position according to the rotation of the swivel table 3, or the welding of the flange 13b and the casing 11, which are in the lower position according to the rotation of the swivel table 3. A welding machine 63 is disposed at a position corresponding to the joining position.

Next, to explain the operation of this embodiment, flanges 13 are provided at both ends of the casing 11 in the catalytic converter 10.
When joining a and 13b by welding, first, one of both swivel bases 3 is installed at position PX, and the other is at welding position P,
The base 2 is rotated so that it is in a position corresponding to .

Moreover, when the mounting is performed at the pH position, the swivel base 3 is rotated so that the first holding means 5 is in the lower position, the second holding means 6 is raised, and the clamping means 7 is opened.

In this state, the receiver places the flange 13a on the plate 46 and positions and holds the flange 13a with the second holding means 5, and at the same time, the receiver brings the flange 13b into contact with the plate 52 and holds the flange 13b with the second holding means 6. The casing 11 is positioned and held, and the casing 11 is placed so that one end thereof fits into the flange 13a held by the first holding means 5.
hold. Thereafter, by lowering the second holding means 6, the flange 13b held by the second holding means 6 is fitted to the other end of the casing 11.

In this way, the flanges 13 are attached to both ends of the casing 11.
A state can be obtained in which the flanges 13a and 13b are fitted together, and in this state, the relative positions of the flanges 13a and 13b with respect to the casing 11 are fixed.

Therefore, when the base 2 is rotated 180 degrees, the casing 11 and the flange 13a, which were in the position P, are installed.
13b will move to the welding position Pw. Therefore, the flange 13a located at the lower position and the casing 11 can be welded together using the welding machine 63.

After that, when the swivel table 3 is rotated 180 degrees, the flange 1
3b is brought to the lower position. Moreover, casing 11
The direction of deviation of the axes of the openings 16 and 17 at both ends of the swivel base 3
Since the direction is perpendicular to the axis of rotation, the rotation of the swivel table 3 brings the welding point between the flange 13b and the casing 11 to almost the same position as the welding point between the flange 13a and the casing 11, and the welding The welding connection between the flange 13b# and the casing 11 can be extremely easily performed by the machine 63.

In this way, the casing 11 and both flanges 13a.

When the welding connection with 13b is completed, the base 2 is rotated 180 degrees while the swivel table 3 is rotated 180 degrees again, and the original mounting position is returned to position P8. Therefore, the installation is at position P. Now, by raising the second holding means 6 while opening the clamp claws 53, 53, and releasing the holding of the flange 13a by the holding means 5, the clamping state of the clamping means 7 is released. The catalytic converter 10 can be taken out in its original position.

Moreover, a pair of swivel tables 3.3 are arranged on the base 2,
When one swivel base 3 is at a position corresponding to the mounting position Px, the other swivel base 3 is at a position corresponding to the welding position Pw, so that the casing 11 and flanges 13a, 13
Attachment and removal of b and welding work can be performed in parallel, and work efficiency can be improved.

Furthermore, when the type of catalytic converter 1o changes, the support plate 4 provided with the first holding means 5, the second holding means 6 and the clamping means 7 may be replaced and attached to the swivel base 3.
Changes in the type of catalytic converter 1o can be easily coped with.

In the above embodiment, a case was explained in which a pair of swivel tables 3゜3 are rotatably supported on the base 2. Position P. and the welding position 91.

C1 Effects of the Invention As described above, the device according to the first feature of the present invention includes a support base which is arranged at a fixed position and around which a mounting position and a welding position are set, and a support base having a mounting position and a welding position set therearound. a base supported by the support base in an angularly displaceable manner about a vertical axis to allow specific positions in the circumferential direction to move between positions corresponding to the respective positions; a swivel base supported for angular displacement; a support plate fixed to the swivel base; and a flange fixedly disposed on the support plate for positioning and holding a flange to be welded to one end of the casing. a first holding means;
a first holding means at a position opposite to the first holding means for positioning and holding the flange to be welded to the other end of the casing;
a second holding means supported by the support plate so as to be movable toward and away from the holding means; and the support for removably holding the casing with one end fitted to the flange held by the first holding means. Since it is equipped with a clamping means provided on the plate, the flanges can be easily positioned and held at both ends of the casing, and welding can be performed at almost the same position, so work efficiency can be improved. .

According to the second feature of the present invention, the support plate is detachably fixed to the swivel base, so that it is possible to easily cope with changes in the type of catalytic converter.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, FIG. 2 is a sectional view taken along the line ■-■ of FIG. 3, FIG. 5 is a sectional view taken along line V-V in FIG. 1, and FIG. 6 is a sectional view taken along line VT-VI in FIG. 1. DESCRIPTION OF SYMBOLS 1...Support stand, 2...Base, 3...Swivel base, 4-way support plate, 5..."th" holding means, 6...2nd holding means, 7...Clamp means , 10...catalytic converter,
11...Casing, 12...Catalyst, 13a,
13 b-...Flange, P,...Mounting position, P,...Welding position Fig. 5 ω 2;)6 Fig.

Claims (2)

[Claims] (1) In an assembly device for a vehicle catalytic converter, which consists of flanges welded to both ends of a basically cylindrical casing that houses a catalyst, the converter is placed in a fixed position and attached around the casing. a support base on which a position and a welding position are set; and a support base supported by the support base so as to be movable in the circumferential direction between positions corresponding to the mounting position and the welding position, respectively, and capable of angular displacement about a vertical axis. a swivel base supported at the specific position of the base to enable angular displacement around a horizontal axis; a support plate fixed to the swivel base; and a flange to be welded to one end of the casing. a first holding means fixedly disposed on the support plate for positioning and holding the casing; and a position facing the first holding means for positioning and holding the flange to be welded to the other end of the casing. A second holding means is supported on the support plate so as to be movable toward and away from the first holding means, and a casing with one end fitted to a flange held by the first holding means is removably held. An assembly apparatus for a catalytic converter for a vehicle, comprising a clamping means provided on the support plate. (2) The apparatus for assembling a catalytic converter for a vehicle according to item (1), wherein the support plate is detachably fixed to the swivel base.