JPH02296582A - Body assembly device - Google Patents

Abstract

PURPOSE:To reduce the facilities cost by providing a back door opening hanger on the hanger arm of a hanger conveyor for carrying the side member of a car body, and enabling the concurrent transport of the side member and the back door opening to a side member assembly machine. CONSTITUTION:In assembling a body, an underbody A is carried to an assembly station 2 via a transfer 12. On the other hand, a common hanger conveyor 4 carries a side member B and a back door opening C to a side member assembly machine 3. ln this case, the carriage 19 of the assembly machine 3 is made to retreat and a turning frame 15 is turned to a horizontal position, thereby directing up receivers 23 and 24. In this state, a hanger arm 41 is lowered and each of members B and C is thereby delivered to the receivers 23 and 24. Thereafter, the turning frame 19 is turned to a vertical position, the carriage 15 is made to advance and the member B is aligned with the under body A. Also, the member C is aligned with the predetermined position between right and left side members B by means of a positioning device 25.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automobile body assembly apparatus for assembling a side member and a frame back door opening.

<Prior Art> As shown in FIG. 6, the constituent members of the bread mold main body include an underbody A, a pair of left and right side members B, a frame back door opening C, a cowl D, and a roof E.

As shown in FIG. 7, these assemblies are carried out by installing a pair of left and right side member assemblies 813 in the assembling station 2 of the car body assembly line 1 that transports the underbody A, with the car body assembly line 1 in between. The side member B is conveyed and supplied to the side member assembling machine 3 by a pair of left and right hanger conveyors 4, and the side member B is assembled and welded to the underbody A. It is supplied to side member B and assembled by welding.

By the way, in a pan-type vehicle, as shown in FIG. 8, the frame back door opening C is set between both assembled side members 8 from above in the F direction and assembled by welding.

This frame back door opening C is transported and supplied to the assembly station by a frame back door opening transport [15].

<Problems to be Solved by the Invention> The above-mentioned conventional assembly device requires a dedicated frame back door opening conveyor 5, which not only increases the equipment cost but also increases the installation cost after joining the side member B to the underbody A. Since the frame back door opening C was supplied, set and welded, assembly required a lot of time.

Means for Solving the Problems> A vehicle body assembly apparatus according to the present invention includes a pair of left and right side member assembling machines installed at an assembly station of a vehicle body assembly line for conveying an underbody, sandwiching the vehicle body assembly line. and a pair of left and right hanger conveyors for conveying and supplying the side members to each of the side member assembling machines, and a hanger for supporting and conveying the frame back door opening is provided on the hanger arm of either the left or right hanger conveyor. , the pair of left and right side member assembling machines includes a movable trolley that approaches and moves away from the underbody, and a jig base that has a side member receiving piece on the movable trolley and reciprocates between a horizontal position and a vertical position. and a receiving piece for receiving the frame back door opening on a jig base on the side member assembly machine side corresponding to the hanger conveyor on the side where the frame back door opening hanger is provided, and a receiving piece for receiving the frame back door opening. This configuration includes a frame back door opening positioning device that grips the frame back door opening, moves it horizontally, moves up and down, and positions it at a predetermined assembly position orthogonal to the traveling direction of the vehicle body.

Function> With the above configuration, the frame back door openings are simultaneously transported and supplied by the side member transport hanger conveyor, and the frame back door openings are positioned at a predetermined position at the same time as the side members are assembled.
This shortens assembly time.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In Fig. 1, 1 is a car body assembly line, 2 is an assembly station, 3 is a side member assembly machine, 4 is a hanger conveyor that conveys and supplies side member B to the side member assembly machine 3, and 6 is a cowl and a roof. The arrangement pattern is the same as the conventional one except that the conventional frame back door opening conveyor 5 is not present.

As shown in FIGS. 2 and 3, the assembly station 2 has a main base 10 installed on the floor, and a support piece 11 for the underbody A carried by a transfer 12 is erected on this non-base 10. ing.

The structure of the side member assembly tl14 will be explained with reference to FIGS. 2 and 3. A side base 13 is installed on the side of the main base 10, and a guide rail 14 is provided on the side base 13 in a direction perpendicular to the transport direction of the assembly line 1, on which a cart 15 can run and move. being guided. A rotary actuator 16 for moving the cart is fixed on the side base 13 and connected to the cart 15 by a toggle arm 17.

A bearing stand 18 is fixedly installed on the truck 15, and a rotating frame 19 is rotatably supported on the bearing stand 18 about a fulcrum 20 between a horizontal position and a vertical position. 21 is a cylinder for rotating the rotating frame.

A jig base 22 is attached to the rotating frame 19, and a side member receiving piece 23 is provided on this.

The above configuration is the same as a conventional side member assembling machine.

Next, as shown in FIG.
A hanger arm 41 that supports the side member B and can be opened and closed is provided so as to be movable up and down. This is also the same as the conventional structure.

Therefore, the present invention provides a hanger 43 for supporting the back door opening C on one of the hanger arms 41 of the pair of left and right hanger conveyors 4 in FIG.
The side member assembling machine 3 on the side corresponding to the hanger conveyor 4 having this hanger 43 has its rotating frame 1.
9 (or the jig base 22) is provided with a back door opening receiving piece and a back door opening positioning device 25.

The structure of the back door opening positioning device 25 is explained in the fifth section.
This will be explained using figures. 26 is a bracket fixed to the rotating frame 19 (or jig base 22). A support stand 28 is provided on the bracket 26 so as to be movable up and down via a guide shaft 29, and a cylinder 27 for raising and lowering the support stand is fixed to the lower surface of the bracket 26.

An arm 30 is attached to the support base 28 so as to be pivotable about a pin 31, and an arm pivoting cylinder 32 for pivoting the arm 30 is attached to be pivotable about a pivot 33.

A clamp device 34 for back door opening B is provided at the tip of the arm 30. This clamping device 34 has a support plate 35 on the arm 30 and a guide shaft 3.
7, and is moved up and down by a support plate lifting cylinder 36 fixed to the arm 30.

A fixed gripping claw 38 is fixedly mounted on the support plate 35, and a movable gripping claw 39 is pivotally connected to the fixed gripping claw 38 so as to be openable and closable. 40 is a cylinder for opening and closing the movable gripping claws.

Next, the operation of the present invention will be explained. The underbody A is carried into the assembly station 2 by a transfer 12, and is positioned and supported by a support piece 11 on a scene base 10.

The hanger conveyor 4 conveys and supplies the side member B to the side member assembling machine 3, and one hanger conveyor 4 supports the back door opening C on the hanger 43 and is conveyed and supplied together with the side member B.

In order to supply the side member B and the back door opening C, the cart 15 of the side member assembly machine 3 is in the backward position, the rotating frame 19 is rotated to the horizontal position, and the side member receiving piece 23 and the back door opening receiving piece are 24
is trending upward.

In response, the hanger arm 41 of the hanger conveyor 4 moves downward and transfers the side member B to the side member receiving piece 23.
Then, the back door opening C is transferred to the back door opening receiving piece 24, and the hanger arm 41 is raised and returned.

Thereafter, the rotating frame 19 is rotated to a vertical position, and the truck 15 moves forward to position the side member B on the underbody A.

On the other hand, the back door opening C received by the back door opening receiving piece 24 is positioned and set at a predetermined position between the left and right side members 8 positioned on the underbody A by the back door opening positioning device 25. The operation will be explained. The clamp device 34 is positioned at the back door opening receiving piece 24rpJ by the rotation of the arm 30, and clamps the back door opening B supported by the back door opening receiving piece 24 with a fixed gripping claw 38 and a movable gripping claw 39. After that, the arm 30 horizontally rotates 909 to change the longitudinal posture of the clamped back door opening C so that it corresponds to the space between the left and right side members 8.Then, the support plate 35 is moved downward, and the back door opens. Set C to the specified position on the left and right side members B from above. Then, the underbody A, side member B and back door opening C are assembled using welding equipment.
After welding is completed, the class device 34 is unclamped, and the cowl D and roof E are next assembled and welded.

When all these assemblies are completed, the back door opening positioning device 25 is returned to its original position, and the trolley 15 is returned to the rearward end to wait for the next assembly cycle.

<Effects of the Invention> As described above, according to the present invention, the hanger for the back door opening is provided on the hanger arm of the hanger conveyor that transports and supplies the side members, and the side members and the back door opening are simultaneously transported and supplied to the side member assembling machine. In addition, since the side member assembly machine is equipped with a positioning device that sets the back door opening in a predetermined position, there is no need for a dedicated conveyor for opening the back door, reducing equipment costs and Since a separate conveyance and supply process for the opening is omitted, the assembly time is advantageously shortened.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the assembly line of the present invention, Fig. 2 is a side view of the side member assembling machine, Fig. 3 is a front view, Fig. 4 is a side view of the hanger conveyor, and Fig. 5 is a side view of the side member assembling machine. A perspective view showing the details of the positioning device in the direction of the arrow V in Figure V, Figure 6 is a perspective view of the assembly members, Figure 7 is an explanatory diagram of the conventional assembly line, and Figure 8 is an explanatory diagram of the back door opening set. It is. 1... Vehicle assembly line, 2... Assembly station,
3... Side member assembly machine, 4... Hanger conveyor, 15... Dolly, 22... Jig base, 23...
... Side member receiving piece, 24... Back door opening receiving piece, 25... Back door opening positioning device, 34... Clamp device, 41... Hanger arm, 43... Hanger, A... Underbody, B.
...Side member C...Back door opening. Figure 5 Figure 3 Figure 6 Figure 4

Claims (1)

[Claims] A pair of left and right side member assembling machines installed across the body assembly line at an assembly station on the body assembly line that transports the underbody, and a pair of left and right side member assemblies that transport and supply side members to each of the side member assemblies. a hanger conveyor, a hanger for supporting and conveying the frame back door opening is provided on the hanger arm of either the left or right hanger conveyor, and the pair of left and right side member assembling machines move toward and away from the underbody. A hanger conveyor is provided on the side where the frame back door opening hanger is provided, and a jig base having a side member receiving piece on the movable truck and reciprocatingly pivots between a horizontal position and a vertical position. A receiving piece that receives the frame back door opening is placed on the jig base of the corresponding side member assembly machine, and the frame back door opening received by this receiving piece is gripped and horizontally rotated and moved up and down to move the vehicle body forward. A vehicle body assembly device comprising: a frame back door opening positioning device for positioning a frame back door opening at a predetermined assembly position perpendicular to the direction;