JP2671605B2 - General-purpose body side assembly jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body side assembly for assembling right and left body sides constituting a side portion of a vehicle body, combining and positioning a plurality of works respectively constituting the body sides in a predetermined arrangement and holding them. The present invention relates to a jig, and more particularly to a general-purpose body side assembling jig capable of assembling a plurality of types of body sides with inexpensive equipment cost and a small number of preparation steps.

[0002]

2. Description of the Related Art Conventional body side assembly is performed in a body side assembly line as shown in FIG. 6, for example. Where LH is the assembly line on the left body side,
RH indicates the assembly line on the right body side. In each of the body side assembly lines LH and RH, # 10 is a work loading and tacking station, # 20 is a spot welding additional hammering station, # 30 is another work loading and loading station. The tacking station, # 40 is another spot-welding reinforcement station, # 50 is the measuring station on the assembled body side, and # 60 is the unloading station on the assembled body side. Further, in the figure, 1 is a worker, 2 is a welding robot, and 3 is a lift-and-carry transfer type transfer device.

In this body side assembly line, in the work inputting and tacking stations # 10, # 30 and the spot welding additional mounting stations # 20, # 40, there are left body side assembly jigs 4 in the left body side assembly line LH.
However, in the right body side assembly line RH, the right body side assembly jig 5 is installed. Each of the body side assembly jigs 4 and 5 is closely attached to a plurality of works constituting the body side from a plurality of directions on a base installed horizontally on the floor surface. A plurality of work positioning members for respectively positioning and a plurality of work clamp mechanisms for respectively sandwiching the plurality of works are respectively erected and fixed in such an arrangement that the works positioned and held by them are combined in a predetermined arrangement. Because it is configured, it is dedicated for only one type of body side.

In such a body side assembly line, in the left body side assembly line LH and the right body side assembly line RH, first, at the work loading and tacking station # 10, the worker 1 makes a plurality of works into a body. The side assembly jigs 4 and 5 are respectively placed at predetermined positions, positioned at predetermined positions by the assembly jigs 4 and 5, and temporarily attached by a spot welding gun to temporarily assemble the body side, then At the spot-welding boosting station # 20, the welding robot 2 positions the temporarily assembled body side with the body-side assembling jigs 4 and 5 to perform spot-welding additional hammering to increase the joint strength of the work. , Another work loading and tacking station # 30 and another spot weld overstrike station # 40, Assembling a further work on the body side and the like, then, the measuring station # 50
Then, the size and shape of the assembled body side are measured to check the assembly accuracy, and the body side is carried out of the line at the carry-out station # 60.

[0005]

However, since the above-mentioned conventional body side assembly jigs 4 and 5 are dedicated to only one type of body side, the type of body side to be assembled. If it is changed, it is necessary to newly manufacture those body side assembly jigs, which increases equipment costs, and those new body side assembly jigs are already installed on the line. However, there was a problem that the man-hours required for preparation were increased because they had to be replaced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to advantageously solve the above-mentioned problems, and in order to assemble the left body side and the right body side that form the vehicle body side portion, those body sides are assembled. In a body side assembling jig for positioning and holding a plurality of works, each of which is configured in a predetermined arrangement, and a plurality of work positioning members for closely positioning the plurality of works from a plurality of directions and positioning the works respectively. A plurality of work clamping mechanisms for respectively sandwiching the plurality of works and a plurality of works positioned by the plurality of work positioning members are combined in a predetermined arrangement. A work clamping mechanism is supported, and those work positioning members and work clamping machines are also provided. A plurality of work positioning robots that move according to the type of body side to be assembled, and the left body side and the right body side to be assembled are positioned symmetrically with respect to each other with a vertical plane therebetween. Each of the multiple workpiece positioning robots
Positioned between the left body side and the right body side to be assembled, and supporting a work positioning member and a work clamp mechanism for positioning and holding respective positions of the left body side and the right body side corresponding to each other, It is characterized by being generalized by moving it.

[0007]

[Operation] In such a general-purpose body side assembly jig,
A plurality of work positioning members respectively supported by a plurality of work positioning robots and a plurality of work clamp mechanisms position and hold a plurality of works so that they are combined in a predetermined arrangement according to the type of the body side. If possible, assemble. Then, when the type of the body side to be assembled is changed, the plurality of work positioning robots appropriately move and arrange the work positioning members and the work clamp mechanism corresponding to the changed type of the body side.
Moreover, in this general-purpose body side assembly jig, the work positioning member and the work clamp mechanism for positioning and holding the left body side and the right body side corresponding to each other are not provided separately but in common work positioning. The robot supports and moves it.

Therefore, according to the general-purpose body side assembling jig of the present invention, one body can be used for assembling a plurality of types of body sides. Therefore, the body side assembling jig is newly added every time the type of the body side is changed. It is possible to eliminate the need to manufacture and replace with a conventional one, and it is possible to reduce the equipment cost and the preparation man-hours for changing the type. Moreover, according to this general-purpose body side assembly jig, since each work positioning robot is shared for the corresponding parts on the left and right body sides, an assembly jig for assembling the left and right body sides with one unit can be manufactured at low cost and with a compact size. Can be configured to.

[0009]

Embodiments 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 which 11 is a left body side, 12 is a right body side, and 13 is a left body side. Assembling jig, and 14 are right body side assembling jigs.

By the way, generally, the left body side assembly jig and the right body side assembly jig are for assembling left and right body sides having symmetrical shapes with respect to a vertical plane passing through the center of the vehicle body in the front-rear direction. The components are the same as each other, and the positions of the respective parts are symmetrical with respect to each other when viewed from the side on which the work is placed. Therefore, the left body side assembling jig 13 and the right body side assembling jig 14 here are vertically arranged in a back-to-back relationship with each other and are integrally configured.

That is, the left and right body side assembly jigs 13, 14
As shown in FIG. 2, each is constructed along two plate-like frames 16 which are erected so as to be parallel to each other on a support base 15 installed on the floor surface. Between the frame-like frames 16, a connecting plate 17 for integrally connecting them is provided.
Are provided horizontally in a plurality of stages, and the plate-like frames 16 are provided with a plurality of through holes 16a along the contours of the left and right body sides 11 and 12 to be assembled. They are formed so as to be aligned with each other in the horizontal direction orthogonal to the plate frame 16. Then, on the connecting plate 17, as shown in FIG. 3B, two guide rails 18 extending along the plate frame 16 are provided.
Ball male screw shafts (not shown) extending along the guide rails 18 are fixed, and the guide rails
Here, using the 18 and the ball male screw shaft, the work positioning robot 19 is commonly used by the left and right body side assembly jigs 13 and 14 so as to correspond to the respective through holes 16a of the plate frame 16.
Are provided.

As shown in FIGS. 3A and 3B, each of the plurality of work positioning robots 19 has a plate-shaped frame.
The two brackets 20 as wrist parts respectively located outside the 16 are provided, and the two brackets 20 are provided.
And a Y-axis direction moving mechanism 21 for moving the bracket 20 in the horizontal Y-axis direction parallel to the plate frame 16, and an X-axis for moving the two brackets 20 in the horizontal X-axis direction orthogonal to the plate frame 16. Direction moving mechanism 22 and Z-axis direction moving mechanism for moving the two brackets 20 in the vertical Z-axis direction
23, wherein the Y-axis direction moving mechanism 21 is a ball circulation slider fixed to the lower surface of the casing 24.
By fitting the guide rail 25 so as to be movable along the guide rail 18, the movement of the casing 24 in the Y-axis direction can be guided.
A ball circulation type nut (not shown) pivotally supported inside and screwed with the above-mentioned ball male screw shaft is rotated by a servo motor (not shown) also provided in the casing 24 by an arbitrary angle to plate the casing 24. The frame 16 can be moved to any position in the Y-axis direction.

Here, two X-axis direction moving mechanisms 22 are provided on the elongated brackets 26 fixed to the upper surface of the casing 20 so as to penetrate through the through holes 16a of the two plate-like frames 16 aligned with each other. Two sets of guide rails laid
Two arm members each having 27 and arranged outside the both plate-like frames 16 so as to project from the inside of the through hole 16a.
A ball circulation slider 29 fixed to the lower surface of 28 is movable along the guide rail 27.
The movement of the two arm members 28 in the X-axis direction can be guided by fitting them to each other, and the ball circulation type nuts 30 fixed to the side surfaces of the arm members 28 can be arranged on both sides of each other. Ball male screw shaft 31 that engages with the screw part in the opposite direction
The bearing portion 32 fixed to the central portion of the bracket 26 is pivotally supported, and the servo motor 33, which is also provided in the central portion of the bracket 26, is rotated by an arbitrary angle via the toothed belt 34. Casing the arm member 28 of the book 24
On the other hand, it is possible to simultaneously move to the arbitrary positions at equal distances in opposite directions in the X-axis direction.

The Z-axis direction moving mechanism 23 includes the Y-axis direction moving mechanism 21 and the X-axis direction moving mechanism 22, which are provided in the casing 35 fixed to the tip ends of the two arm members 28. The two brackets 20 can be moved to arbitrary positions in the Z-axis direction with respect to each of the two arm members 28 by an ordinary ball-screw linear movement mechanism (not shown) that is similarly configured.

Further, the two brackets 20 are respectively positioned on the left and right body sides 11 and 12, which are workpieces corresponding to the body side portion where the workpiece positioning robot 19 is located. A plurality of gauge plates 36 as members are provided corresponding to a plurality of types of works, and one of the gauge plates 36 is driven by a small cylinder to selectively operate as shown by a virtual line in FIG. A normal gauge plate selection mechanism 37 for projecting to a predetermined use position is provided, or a gauge plate 36 that can be commonly used for a plurality of types of works is provided, and although omitted in FIGS. 2 and 3, as shown in FIG. For example, a clamp member is fixed to the tip of the piston rod of a normal swing cylinder that moves and rotates the piston rod. Or, a normal work clamp mechanism 38 configured by connecting the tip end of the piston rod of the cylinder to one end of the clamp member via a crank mechanism, a toggle mechanism, or the like is appropriately provided as necessary. A locating pin (not shown) for fitting the locating hole to position the work is also provided as required.

Therefore, according to each of the work positioning robots 19 described above, the gauge plate 36 located outside the both plate-like frames 16 is used.
And the work clamp mechanism 38 with their plate-like frame 16
On the other hand, the arm member 28 can be moved to any position in the X-axis direction, the Y-axis direction, and the Z-axis direction within a range where it does not interfere with the peripheral wall of the through hole 16a. Install the direction moving mechanism 22 to the left and right body side assembly jigs 1.
3 and 14 can be shared, and equipment cost can be reduced.

As the above-mentioned works, there are, for example, a side sill outer panel, a front pillar assembly, a side roof rail, a rear fender assembly, a center pillar, etc. for each of the left and right body sides 11 and 12, and the gauge plate 36 takes those works. , For example, by bringing each surface of the concave portion of the single gauge plate 36 that fits into the work into contact with the work from a plurality of directions, or by bringing the end faces of the plurality of gauge plates 36 into contact with the work from different directions, Can be positioned. The work clamp mechanism 38 moves the clamp member by a cylinder to bring the clamp member into contact with the work to clamp the work between the work and the gauge plate 36, and to separate the clamp member from the work to remove the work. Can be released.

In the left and right body side assembling jigs 13 and 14, the plurality of works constituting the left and right body sides 11 and 12, respectively, are provided in the left body side assembling jig 13 for the left body side 11. On the plurality of gauge plates 36 respectively supported by the workpiece positioning robots 19 and of the right body side assembly jig 14 for the right body side 12 and the plurality of gauge plates 36 respectively supported by the plurality of workpiece positioning robots 19. When placed on each of them, the plurality of gauge plates 36 and the plurality of work clamp mechanisms 38 are respectively positioned and held so that the plurality of works are combined in a predetermined arrangement according to the type of the body side. , This allows
It is possible to assemble the left and right body sides 11 and 12 vertically.

Then, the left and right body sides 11 to be assembled,
When the type of 12 is changed, the plurality of work positioning robots 19 appropriately move and arrange the gauge plates 36 and the work clamp mechanism 38 in correspondence with the types of the left and right body sides 11 and 12 after the change. Along with the change, the gauge plate selecting mechanism 37 replaces the gauge plate 36 arranged at the use position as required.

Therefore, according to the left and right body side assembling jigs 13 and 14 of the present embodiment, it is possible to assemble a plurality of kinds of left and right body sides 11 and 12 by one unit, so that each time the type of body side is changed. It is possible to eliminate the need to newly manufacture the body side assembly jig and replace it with a conventional one, and to reduce the equipment cost and the preparation man-hours for changing the type.

Further, according to the left and right body side assembling jigs 13 and 14, the left body side assembling jig 13 and the right body side assembling jig 14 are vertically placed back-to-back with each other and integrally formed. Since it is configured, the body side assembly jigs 13 and 14 can be compactly configured as a whole, and the work positioning robot 19 can be shared to reduce the equipment cost.

FIG. 4 shows a body side assembly line to which the left body side 11 and the right body side 12 can be simultaneously assembled in one line, to which the left and right body side assembly jigs 13 and 14 of the above embodiment are applied. It is a plane configuration diagram,
In this line, # 1 is a work loading and tacking station, # 2 is a spot welding additional stamping station, # 3 is an idle station, # 4 is another work loading and tacking station, and # 5 is another spot welding station. Reinforcement station, # 6 is a body-side measuring station that has been assembled, and # 7
Is the unloading station on the assembled body side. 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-described embodiment are installed at the work loading and tacking stations # 1 and # 4 shown in FIG. Also, the number of the work clamp mechanism 38 is slightly reduced and the structure is simplified and installed in each of the spot welding additional hammering stations # 2 and # 5. At each station, the left and right body side assemblies are integrated. The jigs 13 and 14 are arranged so that both plate-like frames 16 extend along the guide rails 40 below the two guide rails 40 for the conveyor 39, as shown in FIGS. It is located in.

On the other hand, the overhead conveyor 39 is
As shown in FIGS. 1 and 2, the vehicle 41 includes a traveling vehicle 43 that is driven by a motor 42 with a speed reducer to drive wheels 41 on the two guide rails 40 and travels on the guide rail 40. Is provided with a lifter mechanism 45 of, for example, a pantograph type provided on the traveling vehicle 43 for raising and lowering the lift table 44 arranged below the lift table 44. Further, below the lift table 44, a plurality of hangers swinging by the air cylinders 46 are provided. 47, the hanger 47 has a lower end portion, as shown in an enlarged view in FIG.
Left and right body sides with rubber-like elastic pads 50 attached to the lower end of the hanger 47 and the clamp member 49, respectively.
Clamping mechanism 51 that clamps the upper roof rails of 11, 12
Is provided. As shown in FIG. 4, six overhead conveyors 39 are provided on the guide rails 40, and each of the overhead conveyors 39 reciprocally moves in synchronization with each other so that two overhead stations such as a transfer type transfer device are adjacent to each other. Transport left and right body sides 11, 12. Then, power supply to the motor of the overhead conveyor 39 and supply of compressed air to the air cylinder are performed via cables and hoses not shown.

In such a body side assembly line, first, at the work loading and tacking station # 1,
By the welding robot 2 transferring the work from a predetermined supply place with a hand held together with the spot welding gun,
Place a plurality of workpieces at predetermined locations on the body side assembly jigs 13 and 14, respectively, position them at predetermined locations with the assembly jigs 13 and 14, and then temporarily attach them with a spot welding gun.
The left and right body sides 11 and 12 are temporarily assembled, and then at the spot welding additional driving station # 2, the welding robot 2 attaches the body side assembly jig 13, to the temporarily assembled body side.
In the state of positioning at 14, the spot welding is additionally struck to increase the bond strength of the work and the idle station # 3
After the above, at another work loading and tacking station # 4 and another spot welding extra driving station # 5, further work is assembled to the left and right body sides 11 and 12 in the same manner as described above. After that, at the measuring station # 6, the worker 1 uses the measuring device 52 to measure the dimensions and shapes of the left and right body sides 11 and 12 that have been assembled, and confirms the assembling accuracy.
At 7, the left and right body sides 11 and 12 are carried out of the line.

At the workpiece loading and tacking stations # 1 and # 4 and the spot welding additional stamping stations # 2 and # 5, the left and right body side assembly jigs 1 are used.
As shown in FIGS. 1 and 2, the reference numerals 3 and 14 hold the assembled left and right body sides 11 and 12 in a vertical position with the outer sides of the vehicle body facing the plate frame 16, respectively. In the overhead conveyor 39, first, the hanger 47 is lowered by the air cylinder 46, the clamp member 49 is separated from the lower end of the hanger 47 by the air cylinder 48, and the lifter mechanism 45 raises the elevating table 44. They are located above the left and right body side assembly jigs 13 and 14 of those stations.

Next, in the overhead conveyor 39, the lifter mechanism 45 is lowered at that position to lower the lift base 44 and then the hanger 47, and then the air cylinder 48 moves the clamp member 49 closer to the lower end portion of the hanger 47. As shown, the upper roof rails of the left and right body sides 11, 12 are clamped, and then the hanger 47 is lifted by the air cylinder 46 as shown by the arrow in FIG. Side assembly jig 13,
14 Lift from above. And overhead conveyor 39
Moves to the next station together with the left and right body sides 11 and 12 hoisted by the traveling vehicle 43, and returns to the standby state at the station in the reverse order of the above procedure, so that the left and right body sides 11 and 12 that have conveyed are moved. , Left and right body side assembly jigs provided at the station
Hand over 13 and 14 and the left and right body side stand that does not position each work, and then return to the original station.

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

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example. For example, the body side assembly jig may have the left or right body side in a horizontal position as required. It may be configured to be assembled by itself.

[0030]

As described above, according to the general-purpose body side assembling jig of the present invention, one body can be used for assembling a plurality of types of body sides. Therefore, a new body side assembling jig is required every time the type of body side is changed. Therefore, it is possible to eliminate the need for manufacturing and replacing with a conventional one, and it is possible to reduce the equipment cost and the preparation man-hours for changing the type. Moreover, according to this general-purpose body side assembly jig, since each work positioning robot is shared for the corresponding parts on the left and right body sides, an assembly jig for assembling the left and right body sides with one unit can be manufactured at low cost and with a compact size. Can be configured to.

[Brief description of 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.

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

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

FIG. 4 Left and right body side assembly jigs 13 and 14 of the above embodiment
It is a plane block diagram which shows the body side assembly line to which is applied.

FIG. 5 is an explanatory view showing an enlarged part of an 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)

(57) [Claims] To 1. A To assemble the left body side and the right <br/> body side constituting a vehicle body side portion, a plurality of workpieces constituting its those of the body side, respectively positioned in conjunction with a predetermined arrangement, In the body side assembly jig for holding, a plurality of work positioning members that closely contact the plurality of works from a plurality of directions to position the works, respectively, and a plurality of work clamp mechanisms that respectively sandwich the plurality of works, With an arrangement such that the plurality of works positioned by the plurality of work positioning members are combined in a predetermined arrangement,
Supporting said plurality of work positioning member and a plurality of workpiece clamping mechanism, and their work positioning member and the workpiece clamping mechanism, and a plurality of work positioning robot to move respectively in accordance with the type of body side assembling, the comprising, assembled Left body side and right body side are vertical surfaces
So that they are placed in plane symmetry with respect to each other.
Each of the workpiece positioning robots, assembling the left
Located between the body side and the right body side, it
The left body side and the right body side correspond to each other
Workpiece positioning for holding and positioning each part
Supporting the member and the workpiece clamping mechanism, characterized Rukoto move, universal body side assembly jig.