JP2653294B2 - How to assemble a car body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a vehicle body on an automobile assembly line.

[0002]

2. Description of the Related Art As is well known, when designing and manufacturing an automobile, it has been conventionally performed based on a car line (number line). As shown in FIGS. , The vertical line and the horizontal line passing through the axle of the front wheels are defined as 0Y and 0Z, respectively, and lines separated from these 0X, 0Y and 0Z at a pitch of 100 mm (for example, 1X and 2X in the Y direction) , 3X... NX) are set as reference lines in the vehicle width direction, the vehicle front-rear direction, and the vehicle height direction. Therefore, all the jigs and the like at the time of assembling the vehicle body are designed and manufactured in principle based on the above-mentioned car line.

[0003] On the other hand, in a conventional mixed production line in which a plurality of types of vehicle bodies flow on the same assembly line, although it is called a mixed production line, the principle is that only bodies of the same grade are flowed. Even if the vehicle body is of the same grade, even if the vehicle type is different, there is no great difference in the skeleton shape of the vehicle body, so that it is more than enough as a versatile body assembly facility.

On the other hand, recently, it has been attempted to assemble the vehicle bodies of different types of vehicles on one line. In this case, when assembling each vehicle body on a car line basis as described above, For example, in the body side assembly line, as shown in FIGS. 14 and 15, the assembly is performed under different silhouettes for each vehicle type. That is, if it is attempted to carry out the positioning, and further to the welding of the body side Bs in the state of FIGS.
As the number of gauges of the jig for receiving each body side Bs increases, the jig itself becomes complicated, and it is necessary to provide a transfer device for body side conveyance to complicate the jig. It becomes difficult, and it will not be established as a body production facility. As a result, it is difficult to realize a true mixed production line in which a plurality of types of vehicle bodies can be assembled on one line regardless of the vehicle type.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has found a feature of a vehicle body shape for each assembly line, and assembles based on a specific portion without being bound by a conventional car number line. It is an object of the present invention to provide an assembling method in which the difference between the above-described reference portions can be maintained before and after each assembly line.

[0006]

SUMMARY OF THE INVENTION The present invention provides a body side assembly line for assembling a body side of an automobile, and a body main assembly for assembling a body main by mutually combining body main components such as the body side and floor main. After the body side assembled on the body side assembly line is transferred to the body side set device of the body main assembly line by the transfer device, the body side is assembled by the body side set device. In the method of assembling a car body which is set on the floor main of the line,
When assembling multiple types of vehicle bodies in a single line using the mixed flow method, the lower end flange and rear end of the side sill outer are positioned at the same position in the body side assembly line regardless of the type of vehicle, and positioning is performed based on this. In the final step of the body side assembly line, the part of the body side that should be the reference position in the vehicle longitudinal direction for each vehicle type on the body main assembly line is a predetermined position. After correcting the position of the body side in the longitudinal direction of the body so that the body side is supported by the transfer device, and receiving the body side from the transfer device, the body side set device of the body main assembly line uses the body side Of which, the reference position in the vehicle width direction and body height direction for each model on the body main assembly line Site serving is characterized by setting the body side with respect to the floor main while correcting the position of the vehicle width direction and the vehicle body height direction of the body side so as to have a predetermined position.

[0007]

According to the method of the present invention, in the body side assembly line, positioning is performed using the lower end flange of the side sill outer as a reference in the vehicle width direction and the vehicle body height direction and the rear end of the side sill outer as a reference in the vehicle longitudinal direction. By assembling the body side, the gauge positions of the jigs that receive the body side can be centralized regardless of the difference in the vehicle type, and the assembly equipment for the body side can be sufficiently established.

In the body side assembly line, assembling is performed based on the side sill outer, as described above, whereas in the body main assembly line, for example, when assembly is performed based on the car number line, the body side assembly line is used. By correcting the position of the body side in the final step and the body side setting device, the relative position between the body side and the floor main on the body main assembly line on which the body side is to be set can be matched.

[0009]

FIG. 2 is a schematic explanatory view of an automobile body assembly line. In an engine compartment assembly line 1, an engine compartment is assembled by assembling parts such as a radiator core support and a dash lower panel. Engine compartment assembly line 1
On the floor main assembly line 2 at the subsequent stage, a front floor, a rear floor and the like are assembled to the engine compartment to assemble the floor main.

On the other hand, in the left and right body side assembly lines 3 which are in a parallel relationship with the floor main assembly line 2, parts such as a center pillar, a front pillar, a side sill outer and a rear fender are assembled with each other to form the left and right body side. Is assembled. In the body main assembly line 4 at the subsequent stage of the floor main assembly line 2, in addition to the body side sent from the left and right body side assembly lines 3, a roof rail is provided for the floor main sent from the floor main assembly line 2. , Roof and rear panel are assembled, and the body main is assembled. The body main assembled on the body main assembly line 4 is transported to a metal line for assembling metal parts such as doors and hoods.

The above-mentioned body side assembly line 3 is shown in FIG.
As shown in (1), the assembling work is performed mainly with jigs individually provided in a plurality of processes and a transfer bar 5 for transporting the work between the processes, and the body side Bs is kept horizontal. At the time of assembling in each process of the body side assembly line 3, the characteristics of the vehicle body shape are grasped, and the lower end flange portion F and the wheel arch portion 6 of the side sill outer S are obtained regardless of the type of vehicle and the difference in vehicle type.
Are received at the body side Bs by the gauges of the gauge units 7 constituting the jig so that the body side Bs is substantially based on the lower end flange portion F and the rear end face e of the side sill outer S. In the front-rear direction (Y direction), and also in the vehicle width direction (X direction) and the vehicle body height direction (Z direction). As shown in FIG. 3, each of the gauge units 7 has, for example, a plurality of gauges 8 having different receiving surface shapes for a side sill outer.
Are arranged in a horizontal series, and one of the gauges 8
Is selectively raised to receive the body side Bs, and has a known structure.

In addition, during the transfer between the respective steps of the body side assembly line 3, as shown in FIG. 1B, the fingers 9 provided on the transfer bar 5 so as to be able to move up and down regardless of the type of the vehicle. The lower end flange portion F of the side sill outer S is supported, and the body side Bs is conveyed by being clamped by a clamp lever 10 that can rotate and move up and down. Reference numeral 11 denotes a cylinder for moving the finger 9 up and down, and reference numeral 42 denotes a cylinder for moving the finger 9 up and down while rotating the clamp lever 10.

As described above, the lower end flange portion F of the side sill outer S is aligned at the same position irrespective of the type of the vehicle and the type of the vehicle, and the rear end face e of the side sill outer S is provided.
Are aligned at the same position, as shown in FIG. 1, the position of the gauge 7 receiving the body side Bs can be concentrated,
14 and 15, the number of gauge units 7 can be reduced, and the transfer space for the transfer bar 5 can be reduced.

On the other hand, in the engine compartment assembling line 1 and the floor main assembling line 2, since there is little difference in the shape of the parts to be assembled depending on the type of car and the type of the car, the parts are positioned with reference to the car number line as in the past, and the assembling is performed. Do.

On the other hand, in the body main assembly line 4, as shown in FIG. 4, the vehicle width direction (X direction) and the vehicle body height direction (Z direction) are based on the car number line as before, while the vehicle body Regarding the front-rear direction (Y direction), assembly is performed by positioning the center pillars P so as to be aligned at the same position (a position that fits within the reference width Q) irrespective of the type of vehicle or the difference in vehicle size. By arranging the center pillars P at the same position in this way, the gauges can be centralized particularly near the center pillar P, and the number of gauge units can be reduced or the movement of the gauges can be reduced.

Here, assembling criteria of each assembly line in the vehicle body assembly line of FIG. 2 are as follows.

[0017]

[Table 1]

Therefore, since the assembly standards are different between the assembly lines as described above, the floor main is transported from the floor main assembly line 2 to the body main assembly line 4 and from the body side assembly line 3 to the body main assembly line. During the transport of the body side to the assembly line 4, it is necessary to correct the posture of the parts in order to ensure consistency of the assembly standards.

[0019] Therefore, in the final step of the floor main assembly line 2, the guide plates with receiving the lower end of the side sill inner Si floor main F _M sent from the previous step as shown in FIG. 5, 6 and 7 in Korokonbeya 12 vehicle width direction of the floor main F _M at 13 over which regulates the position of (X-direction), depending on the vehicle type and vehicle class by the regulating plate 15 of the servo cylinder 14 driving the floor main F _M of the vehicle body front-rear direction (Y-direction) moving by a predetermined amount in correcting the longitudinal direction of the vehicle body position of the floor main F _M. Thus, it is possible to match the assembly reference of the floor main F _M assembled with the floor main assembly line 2, a car track number reference, the center pillar standards required by the body main assembling line 4. The guide plate 13 is also used for the servo cylinder 1
By moving in step 6, the position can be changed according to the vehicle type and the vehicle type.

On the other hand, in the final step of the body side assembly line 3, as shown in FIG. 8, the body side Bs received by the gauge unit 18 on the sub-base 17 is moved by the servo motor 19 in the longitudinal direction of the vehicle in accordance with the type and model of the vehicle. By moving the body side Bs in the body side assembly line 3 by a predetermined amount in the (Y direction), the body side Bs assembled on the side sill outer reference can be matched with the center pillar reference required on the body main assembly line 4.

The body side Bs in which the assembly reference in the Y direction is matched is supported by the saw-toothed fingers 21 of the drop lifter 20 functioning as a transfer device as shown in FIG. It is transferred to the body side setting device 22 of the body main assembly line 4. The body side setting device 22 sets the floor main F _M of the body main assembly line 4 on which is erected a body side Bs received in a horizontal position be advanced so as shown in FIG. 10 Will be.

FIG. 11 shows the body side setting device 22.
FIG. 3 is a diagram showing details of a bracket 2 on a slide base 24 that slides by the action of a servomotor 23.
The fixture 27 is rotatably supported via the shaft 5 and the shaft 26, and the fixture 27 is a swing cylinder 28.
The fixture 27 is provided with a plurality of gauges (including a clamper) 29, 30, 31,... Which are selectively used according to the vehicle type and the vehicle type. For example, in the case of body side B _SA of car A, gauges 29A and 30A are selected, and in the case of car B, other gauges 29B and 30B are selected and used. Each gauge is retracted to the retracted position by the actuator unit 32.

When the body side set device 22 receives the body side Bs from the drop lifter 20, the fixture 27 is retracted together with the slide base 24 as shown by the imaginary line in FIG. And body side Bs with gauges 29, 30, 31 ...
Clamp this as soon as it is received. At this time, as described above, since the body side Bs is assembled based on the side sill outer S in the body side assembly line 3, the reference point a when the body side S is lowered differs depending on the type of the vehicle and the model. Regardless of the position. Therefore, by moving the slide base 24 by the servomotor 23 according to the vehicle type and vehicle classification information to change the position of the shaft 26, the body side Bs can be received by the corresponding gauges 29, 30, 31,. . Therefore, the fixture 27 that has received the body side Bs is rotated and erected as shown in FIG. 11, so that the assembly standard of the body side Bs in the vehicle body height direction (Z direction) is different from the previous side sill outer standard. It is converted to the car number line reference required by the body main assembly line 4, and the reference is matched.

Further, after the fixture 27 is erected as described above, the fixture 27 is moved forward by a predetermined amount together with the slide base 24 by the servo motor 23 in accordance with the vehicle type and vehicle classification information, thereby obtaining the body side Bs. It is properly set for the floor main F _M of the body main assembly line 4. In other words, by changing the amount of advance of the fixture 27 supporting the body side Bs and being erected according to the vehicle type and the vehicle class, the assembly standard in the vehicle width direction (X direction) of the body side Bs is the same as before. consisting of the side sill outer reference to the integrity of the reference between the required be converted to a car track number standards floor main F _M in the body main assembling line 4 can be taken.

[0025]

As described above, according to the present invention, in the body side assembly line, the body side is assembled based on the side sill outer instead of the conventional car number line, and after the assembly is completed, the body side is assembled into the body main assembly line. By adjusting the three-dimensional position of the body side until it is inserted into the body, it is aligned with the assembly standard required for the body main assembly line, so that the body side is received on the body side assembly line The gauge unit can be centralized, and the transfer space of the transfer device such as the transfer bar can be reduced, so that the body side assembly line can be sufficiently established. As a result, it is possible to greatly contribute to the realization of a true mixed production line in which a plurality of types of vehicle bodies can be assembled on a common line regardless of the vehicle type.

[Brief description of the drawings]

FIGS. 1A and 1B are views showing an embodiment of the present invention, wherein FIG. 1A is a plan explanatory view of one step of a body side assembly line, and FIG.

FIG. 2 is a schematic process explanatory view of the entire vehicle body assembly line.

FIG. 3 is a configuration explanatory view showing an example of a gauge unit.

FIG. 4 is an explanatory front view of one process of a body main assembly line.

FIG. 5 is a configuration explanatory view of a final step of the floor main assembly line.

FIG. 6 is an explanatory front view of FIG. 5;

FIG. 7 is an explanatory side view of FIG. 5;

FIG. 8 is a configuration explanatory view of a final step of the body side assembly line.

FIG. 9 is an explanatory diagram of a configuration of a main part of a drop lifter.

FIG. 10 is an explanatory view showing the movement of the body side in the body side setting device.

FIG. 11 is an explanatory diagram of a configuration of a body side set device.

FIG. 12 is an explanatory diagram of a car number line in front of the body of the automobile.

FIG. 13 is an explanatory diagram of a car number line on a side surface of a vehicle body of the automobile.

FIG. 14 is an explanatory plan view of one process of a conventional body side assembly line.

FIG. 15 is a sectional view taken along the line dd in FIG. 4;

[Explanation of symbols]

3: Body side assembly line 4: Body main assembly line Bs: Body side e: Rear end face of side sill outer F: Lower flange part F _M : Floor main S: Side sill outer 20: Drop lifter (transfer device) 22: Body side Set device

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-130483 (JP, A) JP-A-57-83328 (JP, A) JP-A-2-216376 (JP, A)

Claims (1)

(57) [Claims] 1. A vehicle comprising: a body side assembly line for assembling a body side of an automobile; and a body main assembly line for assembling a body main by mutually combining body main components such as the body side and floor main. After transferring the body side assembled on the side assembly line to the body side setting device of the body main assembly line by the transfer device, the body side is set on the floor main of the body main assembly line by the body side setting device. In the vehicle body assembling method as described above, in assembling a plurality of types of vehicle bodies by a single line in a mixed flow method, in the body side assembly line, the lower end flange portion and the rear end portion of the side sill outer are the same regardless of the type of vehicle. Position this In the final process of the body side assembly line, a part of the body side that should be the reference position in the vehicle longitudinal direction for each model on the body main assembly line is determined. After correcting the position of the body side in the front-rear direction of the body so that the body side is at the position, the body side is supported by the transfer device, and the body side set device of the body main assembly line receiving the body side from the transfer device, The position of the body side in the vehicle width direction and body height direction so that the part that should be the reference position in the vehicle width direction and body height direction for each model on the body main assembly line is the predetermined position A vehicle body assembling method, wherein the body side is set to the floor main while correcting the above.