JPH04224095A - General purpose bodyside assembling jig - Google Patents

Abstract

PURPOSE:To assemble plural kinds of bodyside with inexpensive equipment and a few preparating man-hour. CONSTITUTION:Plural through holes 16a are set along the out line of the right and left bodysides 11, 12 on two sheets of the plate like frames 16 standing on the supporting stand 15, the plural arm components of the work positioning robot 19 which are shared with the right and left bodyside assembling jigs 13, 14 arranged on the jointing plate 17 set between both plate like frames 16 are inserted in each of the above plural numbers of the through holes 16a, and the gauge plate 36 and the work clamp mechanism 38 is set at the bracket, which is moved to three dimentional direction based on the motion of the robot 19, set at the tip end part of the arm component. Therefore, the robot 19 changes the position of the gauge plate 36 and the work clamping mechanism 38 properly corresponding to the kind of bodyside, plural works are positioned respectively to the prescribed position and clamped.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a body side assembly jig for assembling, positioning, and holding a plurality of workpieces constituting the body side in a predetermined arrangement in order to assemble the body side constituting the side portion of the vehicle body. ,in particular,
The present invention relates to a general-purpose body side assembly jig that can assemble a plurality of types of body sides at low equipment cost and with a small number of preparation steps.

0002

2. Description of the Related Art Conventional body side assembly is carried out, for example, on a body side assembly line as shown in FIG. Here, in the figure, LH indicates the assembly line for the left body side, and RH indicates the assembly line for the right body side.
On each body side assembly line LH, RH, #1
0 is a work loading and tacking station, #20 is a spot welding additional station, #30 is another work loading and tacking station, #40 is another spot welding additional station, and #50 is the completed assembly. The body side measuring station, and #60 is the unloading station for the assembled body side. Further, in the figure, 1 indicates a worker, 2 indicates a welding robot, and 3 indicates a lift-and-carry type transfer type conveyance device.

[0003] In this body side assembly line, there are workpiece input and tacking stations #10 and #30 and additional spot welding stations #20 and #4.
0, the left body side assembly jig 4 is installed on the left body side assembly line LH, and the left body side assembly jig 4 is installed on the right body side assembly line RH.
In this case, the right body side assembly jig 5 is installed. Each of these body side assembly jigs 4 and 5 is placed on a base horizontally installed on the floor, and is attached to a plurality of workpieces constituting the bodyside in close contact with the workpieces from a plurality of directions. A plurality of workpiece positioning members that respectively position the plurality of workpieces and a plurality of workpiece clamp mechanisms that respectively clamp the plurality of workpieces are respectively erected and fixed in an arrangement such that the workpieces positioned and held by them are combined in a predetermined arrangement. Because it is constructed with a 3D design, it is designed specifically for use with only one type of body side.

[0004] In such a body side assembly line, in each of the left body side assembly line LH and the right body side assembly line RH, a worker 1 first attaches a plurality of workpieces to the body at a workpiece loading and tacking station #10. The body side is temporarily assembled by placing it on the side assembly jigs 4 and 5, positioning it in the predetermined position using the assembly jigs 4 and 5, and temporarily attaching it with a spot welding gun, and then temporarily assembling the body side. At additional spot welding station #20, the welding robot 2 performs additional spot welding while positioned on the temporarily assembled body side using body side assembly jigs 4 and 5 to increase the joint strength of the workpieces, and further , At another work loading and tacking station #30 and another spot welding additional station #40, other work pieces are assembled on the body side in the same manner as above, and then at measurement station #50, assembly is carried out. The dimensions and shape of the completed body side are measured to confirm assembly accuracy, and the body side is carried out of the line at carry-out station #60.

[0005]

[Problems to be Solved by the Invention] However, since the conventional body side assembly jigs 4 and 5 described above are dedicated to only one type of body side, it is difficult to assemble the types of body sides to be assembled. When the body side assembly jigs are changed, it is necessary to manufacture new body side assembly jigs, which increases equipment costs, and the new body side assembly jigs are replaced with the conventional ones already installed on the line. There was a problem in that it required a lot of man-hours to prepare.

[0006]

[Means for Solving the Problems] The present invention has been made to advantageously solve the above problems, and in order to assemble a body side that constitutes a side portion of a vehicle body, a plurality of workpieces that constitute the body side are assembled. A body side assembly jig for positioning and holding the plurality of workpieces in combination in a predetermined arrangement, the plurality of workpiece positioning members closely positioning the plurality of workpieces from a plurality of directions, respectively, and the plurality of workpieces. The plurality of workpiece positioning members and the plurality of workpiece clamping mechanisms are supported in an arrangement such that the plurality of workpiece clamping mechanisms that respectively clamp the plurality of workpieces are combined in a predetermined arrangement with the plurality of workpieces positioned by the plurality of workpiece positioning members. and a plurality of work positioning robots that respectively move the work positioning member and the work clamp mechanism according to the type of body side to be assembled, and is characterized by being versatile.

[0007]

[Function] In this general-purpose body side assembly jig,
A plurality of workpiece positioning members and a plurality of workpiece clamp mechanisms, each supported by a plurality of workpiece positioning robots, position and hold the plurality of workpieces in a predetermined arrangement according to the type of body side. It is possible to assemble the When the type of body side to be assembled is changed, the plurality of work positioning robots appropriately move and rearrange the work positioning members and work clamp mechanisms in accordance with the changed type of body side.

Therefore, according to the general-purpose body side assembly jig of the present invention, a single body side assembly jig can handle the assembly of multiple types of body sides, so a new body side assembly jig can be used each time the type of body side is changed. It is possible to eliminate the need to manufacture and replace the conventional one, and it is possible to reduce equipment costs and preparation man-hours for changing types.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment in which a general-purpose body side assembly jig of the present invention is applied to a body side assembly line. In the figure, 11 is a left body side, 12 is a right body side, and 13 is a left body side. An assembly jig, and 14 indicate a right body side assembly jig.

By the way, the left body side assembly jig and the right body side assembly jig are generally used for assembling left and right body sides that are symmetrical in shape with respect to a vertical plane passing through the center of the vehicle in the longitudinal direction. They have the same configuration, and the arrangement of each part is symmetrical to each other when viewed from the side on which the work is placed. For this reason, the left body side assembly jig 13 and the right body side assembly jig 14 here are vertically placed back to back and are integrally constructed.

That is, the left and right body side assembly jigs 13,
As shown in FIG. 2, each frame 14 is constructed along two plate-shaped frames 16 that are erected parallel to each other on a support stand 15 installed on the floor. A plurality of connecting plates 17 are provided horizontally between the plate frames 16 to integrally connect them, and the plate frames 16 are provided with a connecting plate 17 along the contours of the left and right body sides 11 and 12 to be assembled. The plurality of through holes 16a are
The through holes provided in both plate-shaped frames 16 are formed so as to be aligned with each other in the horizontal direction orthogonal to the plate-shaped frames 16. And on the connecting plate 17, there is a
As shown in (b), two guide rails 18 extending along the plate-shaped frame 16 and a male ball screw shaft (not shown) extending along these guide rails 18 are fixed, Using these guide rails 18 and male ball screw shafts, a plurality of workpiece positioning robots 19, which are shared by the left and right body side assembly jigs 13 and 14, are arranged here so as to correspond to each through hole 16a of the plate-shaped frame 16. ing.

Each of the plurality of workpiece positioning robots 19 is provided with two brackets 20 as wrist portions located outside of both plate-shaped frames 16, respectively, as shown in FIGS. 3(a) and 3(b). At the same time, the two brackets 20 are aligned in a horizontal direction parallel to the plate frame 16.
A Y-axis moving mechanism 21 that moves the two brackets 20 in the axial direction, an X-axis moving mechanism 22 that moves the two brackets 20 in the X-axis direction, which is a horizontal direction perpendicular to the plate frame 16, and a Y-axis moving mechanism 22 that moves the two brackets 20 in the vertical direction. It is provided with a Z-axis direction movement mechanism 23 for moving in the Z-axis direction, where Y
In the axial movement mechanism 21, a ball circulation type slider 25 fixed to the lower surface of the casing 24 moves along the guide rail 1.
By fitting into the guide rail 18 so as to be movable along the casing 8, the casing 24 can be guided in movement in the Y-axis direction. A servo motor (not shown) provided inside the casing 24 rotates a ball circulation type nut (not shown) by an arbitrary angle, thereby moving the casing 24 to an arbitrary position in the Y-axis direction with respect to the plate-shaped frame 16. can be moved to

[0013] Also, the X-axis direction moving mechanism 22 is provided on two elongated brackets 26 fixed to the upper surface of the casing 20 so as to pass through the through holes 16a of both plate frames 16 that are aligned with each other. It has two sets of guide rails 27, and both plate-shaped frames 16.
A ball circulation type slider 29 is fixed to the lower surface of two arm members 28 which are arranged to protrude from inside the through hole 16a, respectively, and is movable along the guide rail 27. By fitting together, it is possible to guide the movement of the two arm members 28 in the X-axis direction. A bearing part 32 fixed to the center of the bracket 26 pivots a ball male threaded shaft 31 that is screwed together with a threaded part in the direction, and a servo motor 33 also provided in the center of the bracket 26 drives a toothed belt 34. By rotating the two arm members 28 by an arbitrary angle, the two arm members 28 are attached to the casing 24.
On the other hand, they can be simultaneously moved to arbitrary positions by equal distances in mutually opposite directions in the X-axis direction.

The Z-axis direction moving mechanism 23 includes a casing 3 fixed to the tip of each of the two arm members 28.
The two brackets 20 are moved to the two arm members 28 by a normal ball screw type linear movement mechanism (not shown), which is configured similarly to the Y-axis movement mechanism 21 and the X-axis movement mechanism 22, and is provided in the In contrast, it can be moved to any position in the Z-axis direction.

Furthermore, each of the two brackets 20 has a workpiece positioning device for positioning a workpiece that is to constitute the left and right body sides 11 and 12 and corresponds to the part of the body side where the workpiece positioning robot 19 is located. A plurality of gauge plates 36 are provided as members corresponding to plural types of workpieces, and a required one of the gauge plates 36 is driven by a small cylinder to selectively operate the gauge plate 36 as shown by the imaginary line in FIG. A normal gauge plate selection mechanism 37 that protrudes to a predetermined use position is provided, or a gauge plate 36 that can be used in common for multiple types of workpieces is provided, and as shown in FIG. 1 although omitted in FIGS. 2 and 3,
For example, a clamp member is fixed to the tip of the piston rod of a normal swing cylinder that moves the piston rod back and forth and rotates, or the tip of the piston rod of the cylinder is attached to one end of the clamp member by a crank mechanism. A normal workpiece clamping mechanism 38 connected via a toggle mechanism or the like is provided as required, and in addition, a locating pin (not shown) that fits into a locating hole of the workpiece to position the workpiece is also provided as required. Provided as appropriate.

Therefore, each of the workpiece positioning robots 19
According to the above, the gauge plate 36 and the work clamp mechanism 38 located on the outside of both the plate-shaped frames 16 are aligned in the X-axis direction with respect to the plate-shaped frames 16 within the range where the arm member 28 does not interfere with the peripheral wall of the through hole 16a. , can be moved to any position in the Y-axis direction and the Z-axis direction, and the Y-axis direction movement mechanism 21 and the X-axis direction movement mechanism 22 can be shared by the left and right body side assembly jigs 13 and 14, Equipment costs can be reduced.

Note that the above-mentioned works include, for example, side sill outer panels, front pillar assemblies, side roof rails, rear fender assemblies, center pillars, etc. for each of the left and right body sides 11 and 12, and the gauge plate 36 is used to carry out these works. For example, by bringing each surface of a concave portion of a single gauge plate 36 that fits into the work into close contact with the work from multiple directions, or by bringing the end faces of a plurality of gauge plates 36 into close contact with the work from different directions, Can be positioned. The work clamp mechanism 38 moves the clamp member with a cylinder to bring the clamp member into contact with the work and clamp the work between it and the gauge plate 36, and also to separate the clamp member from the work to hold the work. can be released.

Such left and right body side assembly jigs 13,1
4, the plurality of workpieces constituting the left and right body sides 11 and 12 are respectively supported by the plurality of workpiece positioning robots 19 of the left body side assembly jig 13 for the left body side 11. When placed on the gauge plate 36 and, for the right body side 12, on the plurality of gauge plates 36 supported by the plurality of workpiece positioning robots 19 of the right body side assembly jig 14, the plurality The gauge plate 36 and the plurality of work clamp mechanisms 38 respectively position and hold the plurality of works in a predetermined arrangement according to the type of body side.
12 can be assembled vertically.

[0019] Then, the left and right body sides 11 to be assembled
, 12, the plurality of workpiece positioning robots 19 move the gauge plates 36 and workpiece clamp mechanisms 38 to the left and right body sides 11, 12 after the change.
The gauge plates 36 are moved and arranged as appropriate depending on the type of gauge plate 36, and the gauge plate selection mechanism 37 replaces the gauge plate 36 placed in the use position as required.

Therefore, according to the left and right body side assembly jigs 13 and 14 of this embodiment, one unit can handle the assembly of a plurality of types of left and right body sides 11 and 12, so that it can be assembled every time the type of body side is changed. It is possible to eliminate the need to newly manufacture a body side assembly jig and replace it with a conventional one, and it is possible to reduce equipment costs and preparation man-hours for changing types.

Furthermore, according to the left and right body side assembly jigs 13 and 14 of this embodiment, the left body side assembly jig 1
3 and the right body side assembly jig 14 are placed vertically with their backs to each other and are integrally constructed, so that the body side assembly jigs 13 and 14 can be constructed compactly as a whole, and the workpiece can be Equipment costs can be reduced by sharing the positioning robot 19.

FIG. 4 shows a body side assembly line in which the left and right body side assembly jigs 13 and 14 of the above embodiment are applied and can assemble the left body side 11 and the right body side 12 at the same time on one line. This is a plan configuration diagram, and in this line, #1 is a workpiece loading and tacking station, #2 is a spot welding additional station, #3 is an idle station, #4 is another workpiece loading and tacking station, and #5 is a workpiece loading and tacking station. Another additional spot welding station, #6 is a measurement station for the assembled body side, and #7 is a carry-out station for the assembled body side. Further, in the figure, 1 is a worker, 2 is a welding robot, 39 is an overhead conveyor, and 40 is a guide rail that supports the overhead conveyor 39 and guides its travel.

In this body side assembly line, the left and right body side assembly jigs 13 and 14 of the above embodiment are as follows:
Work loading and tacking station #1 shown in Figure 1,
In addition to the spot welding station #4, the number of gauge plates 36 and work clamp mechanisms 38 are slightly reduced to simplify the configuration.
#5, and at each station, these integrated left and right body side assembly jigs 13
, 14 are arranged so that both plate-shaped frames 16 extend along the two guide rails 40 for the conveyor 39 below the two guide rails 40, as shown in FIGS. 1 and 2. ing.

On the other hand, the overhead conveyor 39 has two guide rails 4 as shown in FIGS.
A traveling vehicle 43 that travels on a guide rail 40 by driving wheels 41 mounted on a motor 42 with a speed reducer and a lifting platform 44 disposed below the traveling vehicle 43 is provided.
For example, a pantograph-type lifter mechanism 45 provided on the traveling vehicle 43 for raising and lowering the elevator platform 4 is provided.
4 is provided with a plurality of hangers 47 each swinging by an air cylinder 46. At the lower end of the hanger 47, as shown in an enlarged view in FIG. A clamp mechanism 51 is provided which clamps the upper end roof rail portions of the left and right body sides 11 and 12 with rubber-like elastic pads 50 attached to the lower end portion of the hanger 47 and the clamp member 49, respectively. As shown in FIG. 4, six overhead conveyors 39 are provided on a guide rail 40, and by reciprocating in synchronization, the overhead conveyors 39 are conveyed between two adjacent stations like a transfer type conveyor. The left and right body sides 11 and 12 are transported. Electric power is supplied to the motor of the overhead conveyor 39 and compressed air is supplied to the air cylinders through cables and hoses (not shown).

In such a body side assembly line, first, at the workpiece loading and tacking station #1, the welding robot 2 transfers the workpieces from a predetermined supply location with a hand held together with a spot welding gun, thereby welding a plurality of workpieces. Place the workpieces at predetermined locations on the body side assembly jigs 13 and 14, position them in the predetermined positions using the assembly jigs 13 and 14, and then temporarily attach them with a spot welding gun to assemble the left and right body side 11, 12 is temporarily assembled, and then at additional spot welding station #2, the welding robot 2 performs additional spot welding on the temporarily assembled body side with the body side assembly jigs 13 and 14 positioned on the workpiece. After passing through idle station #3, the left and right body side 11, 12, and then at measuring station #6, worker 1
The measurement device 52 measures the dimensions and shapes of the left and right body sides 11 and 12 that have been assembled to confirm assembly accuracy, and the left and right body sides 11 and 12 are carried out of the line at a carry-out station #7.

[0026] At the workpiece loading and tacking stations #1, #4 and additional spot welding stations #2, #5, the left and right body side assembly jig 1 is
3 and 14, as shown in FIGS. 1 and 2, the assembled left and right body sides 11 and 12 are held vertically with the outer side of the vehicle body facing toward the plate-shaped frame 16. The overhead conveyor 39 first uses an air cylinder 46 to lower the hanger 47 and then uses an air cylinder 48 to move the clamp member 49 to the hanger 4.
7, and in a standby state where the lifting platform 44 is raised by the lifter mechanism 45, it is located above the left and right body side assembly jigs 13, 14 of those stations.

Next, the overhead conveyor 39 is moved to the position shown in FIG. As shown, by holding the upper end roof rail portions of the left and right body sides 11 and 12, and then lifting the hanger 47 with the air cylinder 46 as shown by the arrow in FIG. Lift it up from above the side assembly jigs 13 and 14. Then, the overhead conveyor 39 moves to the next station together with the left and right body sides 11 and 12 lifted up by the traveling vehicle 43, and returns to the standby state at that station by following the procedure in reverse to the above. 11 and 12 are the left and right body side assembly jigs 13 and 1 provided at that station.
4, each workpiece is transferred to the left and right body side stands without positioning, and then returned to its original station.

Therefore, according to the body side assembly line of this embodiment, the left and right body sides 11,
12 can be assembled, the line installation space can be reduced and space efficiency can be improved.

Although the above description has been made based on the illustrated example, the present invention is not limited to the above-mentioned example. For example, the body side assembly jig can be used with the left or right body side placed horizontally as required. It may be constructed so that it can be assembled independently.

[0030]

[Effects of the Invention] Thus, according to the general-purpose body side assembly jig of the present invention, one unit can handle the assembly of multiple types of body sides, so a new body side assembly jig is required every time the type of body side is changed. This eliminates the need to manufacture and replace conventional ones, thereby reducing equipment costs and preparation man-hours for changing types.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment in which a general-purpose body side assembly jig of the present invention is applied to a body side assembly line.

FIG. 2 is a side view of the body side assembly jig of the above embodiment as seen from the upstream side of the line.

FIG. 3(a) is a plan view showing a positioning robot in the body side assembly jig of the above embodiment, and FIG. 3(b) is a side view showing the positioning robot.

[Fig. 4] Left and right body side assembly jig 13 of the above embodiment,
FIG. 2 is a plan configuration diagram showing a body side assembly line to which No. 14 is applied.

FIG. 5 is an explanatory diagram showing an enlarged part of the overhead conveyor in the body side assembly line.

FIG. 6 is a plan configuration diagram showing a conventional body side assembly line.

[Explanation of symbols]

11 Left body side 12 Right body side 13 Left body side assembly jig 14 Right body side assembly jig 19 Work positioning robot 36 Gauge plate 38 Work clamp mechanism

Claims (1)

[Claims] 1. A body side assembly jig for assembling body sides (11, 12) constituting a vehicle body side, for assembling, positioning, and holding a plurality of workpieces constituting the body side in a predetermined arrangement, the jig comprising: a plurality of workpiece positioning members that closely position the plurality of workpieces from a plurality of directions;
36), a plurality of work clamp mechanisms (38) that clamp the plurality of workpieces, and a plurality of workpieces positioned by the plurality of workpiece positioning members are arranged in a predetermined arrangement. a plurality of work positioning robots (19) that support a work positioning member and a plurality of work clamp mechanisms, and move the work positioning members and work clamp mechanisms respectively according to the type of body side to be assembled;
A general-purpose body side assembly jig.