JPS6222736B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear upper panel assembling device for assembling a rear upper panel to a floor main body and a side body.

Conventionally, the assembly of the rear top panel to the floor main and side bodies involves, for example, a shuttle bar for loading and unloading the floor main, a positioning means for receiving and positioning the floor main from the shuttle bar, and a means for carrying the side body into the positioned floor main. This was carried out using an automobile body assembly device that included a side body assembly mechanism for positioning, a welding robot, and a rear upper panel assembly mechanism for transporting and positioning the rear upper panel to the floor main to which the side body was joined.

However, with such conventional automobile body assembly equipment, if the rear top panel is joined to the main floor before the side body, the rear top panel will get in the way and the side body cannot be joined. Assembly was performed in the order of joining the main floor, then the rear top panel to the main floor and side bodies. Therefore, as shown in FIG. 1, the rear upper panel 1 rides on the rear fender 2 of the side body, that is, the rear upper panel 1 contacts the rear fender 2 from the outside, and the rear upper panel 1 and the rear upper panel 1
If there is a defect in the seal at the joint with the metal, water and dust can easily enter through the seal, potentially causing rust and corrosion.

This invention was made by focusing on such conventional problems, and the rear upper panel is designed so that the rear upper panel can be positioned below (inside) the rear fender at the joint between the rear upper panel and the rear fender of the side body. The object of the present invention is to provide a rear upper panel assembly device that can join the rear upper panel to the main floor panel before the side body.

The present invention will be explained below based on the drawings. 2 to 7 are diagrams showing an embodiment of the present invention. First, to explain the structure, in Figures 2 and 3, 3 is a pit provided on the floor 4 of one stage (rear upper panel assembly stage) of an automobile body assembly line, and 5 is a pit provided in the pit 3. It is a lifter that can be raised and lowered. This lifter 5
receives the floor main 7 carried by the shuttle bar 6 extending above the pit 3 in the flow direction of the line from the shuttle bar 6 and holds it at a predetermined height position (rear upper panel assembly position). . Reference numerals 8 and 9 designate industrial robots disposed on the floor surface 4 on both sides of the pit 3, and spot welding guns 10 and 11 are attached to the tips of arms 8a and 9a, respectively.

Reference numerals 12 and 12 are provided on a side body fixture to be described later, and cross the pit 3 above the rear end of the floor main 7 held by the lifter 5 (the left side is the front and the right side is the rear in FIG. 2). A pair of rails 13 extend in a direction in which the rails 12 and 1 are
This is a rear upper panel loader that can run along the road. This rear upper panel loader 13 is provided with a rear upper panel mounting jig 18 that is driven by a hydraulic cylinder 16 and moves up and down while being guided by guide bars 17, 17. This jig 18 is adapted to hold the rear upper panel 1 in the same position as when joining it to the floor main 7. Such a rear upper panel loader 13 is driven by a drive means (not shown) such as a chain driven by a motor, and is located at a rear upper panel loading position (not shown) and a rear upper panel assembly position (shown in FIGS. 2 and 3). The vehicle is designed to run between the two locations. Said rail 12,1
2. The rear upper panel loader 13 and the driving means of the rear upper panel loader 13 are combined to form a rear upper panel carrying mechanism 19. Fourth,
In FIG. 5, 21 is a known side body fixture provided at the next stage (side body assembly stage) after the rear upper panel assembly stage, and 22 is a lifter provided on the floor surface 4. Welding robots 23 and 24 are attached to the side body fixture 21, and spot welding guns 25 and 26 are attached to the tips of arms 23a and 24a. 27a,2
7b, 27c... are side body fixtures 2
This is a group of spot welding guns provided in No. 1. 29
is a base fixed to the frame 30 of the side body fixture 21 above the side body assembly position to the floor main 7 supported by the lifter 22, and 31, 32, 33, and 34 are respectively attached to the pins 35. Therefore, it is a link whose one end is rotatably connected to the base 29. Link 31,3
A bracket 36 is rotatably connected to the other ends of 2, 33, and 34 by a pin 37. 38,
39 is rotatably supported by the bracket 36.
These are a pair of link-type pawl members. This claw member 38,3
9 are each connected to a piston rod 41a of a fluid pressure actuated cylinder 41 fixed to the bracket 36 via a rod 40 spanned between both base ends, and the distal end 38a moves in response to the movement of the piston rod 41a back and forth. , 39a can be opened and closed to grip the upper end of the rear upper panel 1 welded to the floor main 7. 4
2 is a fluid pressure operated cylinder rotatably attached to the base 29, and its piston rod 42a
The tip of the rod 43 is rotatably connected to a rod 43 that spans between the links 33 and 34. the result,
When the piston rod 42a protrudes, the link 33,
34, 31, 32 respectively swing around the pin 35, and the bracket 36 and the claw members 38, 3
9 and the like move from the hanging position toward the front end of the floor main 7 (leftward in FIG. 4), and return to the hanging position when the piston rod 42a retreats. A stopper 44 is fixed to the base 29 and comes into contact with the links 31 and 32 to define their swing range. The base 29, pins 35, 3
7. The links 31, 32, 33, 34, the bracket 36, the claw members 38, 39, the rods 40, 43, the hydraulic cylinders 41, 42, and the stopper 44 are combined to form a rear upper panel tilting/retracting mechanism 45.
It consists of A gauge 46 is swingably attached to the side body fixture 21 and serves as a positioning means for positioning the rear upper panel 1 when pulling back the rear upper panel, which will be described later.

Next, the action will be explained.

The floor main 7 assembled in the previous process is moved to the rear top panel loading mechanism 1 by the shuttle bar 6.
When the lifter 5 is transported to the rear upper panel assembly stage where the rear upper panel 9 is installed, the lifter 5 rises as shown in Figs. Stop. Next, the rear upper panel loader 13, which has loaded the rear upper panel 1 on the jig 18 at the loading position, travels to the rear upper panel assembly position. Rear Atsupa Panel Loader 1
3 stops at the rear upper panel assembly position, the jig 18 is lowered, and the rear upper panel 1 comes to a predetermined welding position relative to the floor main 7. Then, the industrial robots 8 and 9 are driven, and the rear upper panel 1 is welded to the floor main 7 using welding guns 10 and 11 as shown in FIG. When welding is completed, the rear atsupah panel loader 13 returns to the jig 1.
8 is raised to return to the rear upper panel loading position, the lifter 5 is lowered, and the floor main 7 to which the rear upper panel 1 has been welded is transferred onto the shuttle bar 6 and transported to the next side body assembly stage. The floor main 7, which has been transferred from the shuttle bar 6 onto the lifter 22 at the side body assembly stage shown in FIGS. 4 and 5, is lifted by the lifter 22 to the side body assembly position. Therefore, the rear upper panel tilting/retracting mechanism 45 is driven, and the piston rod 41a of the cylinder 41 for driving the pawl members, which had been protruding until then, retreats, and the tip brackets 38a,
39a closes and grips the upper end of the rear upper panel 1. Next, the piston rod 42a of the link driving cylinder 42 protrudes, causing the links 31, 32, 33, and 34, which have been in a hanging state, to swing toward the front end of the floor main 7 about the pins 35, respectively. This link 31, 32, 33, 34
As the links 31, 32, 33, 34
The bracket 36 and the claw member 38 connected to the
39 etc. also moves from the hanging position to the front end side of the floor main 7. As a result, the rear upper panel 1 held by the claw members 38 and 39 is tilted toward the front end of the floor main 7, as shown in FIG. When the piston rod 42a of the cylinder 42 protrudes by a predetermined stroke, the links 31 and 32 come into contact with the stopper 44 and stop swinging. Then, as shown in FIG. 7, the rear upper panel 1 is tilted toward the front end of the floor main 7 at a predetermined angle so that it does not interfere with the side bodies, and the side bodies 47, 48 are moved by the side body fixture 21. is transported to the assembly position to the floor main 7. And welding robots 23, 24
Welding guns 25, 26 and welding gun groups 27a, 27b, 27c of side body fixture 21
..., the side bodies 47, 48 are welded to the floor main 7. Once this welding is complete,
The rear upper panel tilting/retracting mechanism 45 is driven again, and the protruding piston rod 42a of the cylinder 42 starts to retreat. As a result, link 3
1, 32, 33, and 34 swing toward the rear end of the floor main 7 in the opposite direction, and the bracket 36 and claw members 38 and 39 also move in the same direction, returning the tilted rear upper panel 1 to its original state. Pull back to . When the pulled back rear upper panel 1 comes into contact with the gauge 46 and is positioned, the cylinder 42 stops operating. At this time, the rear upper panel 1 is in contact with the rear fenders of the side bodies 47 and 48 from below (inside). Next, the welding robot 23 and the corresponding one of the welding gun groups 27a, 27b, and 27c are attached to the rear upper panel 1 and the side body 4.
7 and 48 are welded. When the welding is completed, the cylinder 41 of the rear upper panel tilting/retracting mechanism 45
The piston rod 41a protrudes, and the claw members 38,
The tips 38a and 39a of 39 open and release the rear upper panel 1 that they were holding. Next, the lifter 22
lowers, floor main 7 and rear atsupa panel 1
The assembly of the side bodies 47 and 48 is transferred to the shuttle bar 6. This assembly is then transported to the next processing stage by the shuttle bar 6.

As explained above, according to the present invention, prior to joining the side body to the floor main, the rear top panel is joined to the floor main, and then after the side body is joined to the floor main, the rear top panel is joined to the side body. The equipment includes a carrying mechanism for carrying and positioning the rear upper panel to the floor main which has been positioned at the assembly position, a welding gun for welding the rear upper panel to the floor main, and a welding machine for welding the rear upper panel to the floor main before joining the side body to the floor main. Grasp the rear top panel connected to the floor main and press it toward the front end of the floor main to tilt it at a predetermined angle. After completing the assembly of the side body to the floor main, pull the tilted rear top panel back to its normal position. It is possible to provide a rear upper panel assembly device comprising a tilting and pulling back mechanism, a positioning means for pulling back the rear upper panel to a normal position, and a welding gun for welding a side body to the floor main and rear upper panel. As a result, the rear atsupa panel can be joined to the floor main before the side body, and the rear atsupa panel can be positioned below (inside) the rear fender of the side body at the joint between the rear atsupa panel and the side body. Even if there is a defect in the seal at the joint between the rear fender and the rear fender, there is no risk of water or dust entering the interior of the vehicle.

[Brief explanation of the drawing]

FIG. 1 is an arrow view showing the overlapping state of the joint between a rear top panel and a rear fender of a side body assembled by a conventional automobile body assembly device, and FIG. 2 is a rear top panel in a rear top panel assembly device according to the present invention. FIG. 3 is a front view of the rear upper panel loading mechanism shown in FIG. 2, and FIGS. 4 and 5 show a welding gun, a rear upper panel tilting/retracting mechanism, and a positioning gauge in the rear upper panel assembly apparatus according to the present invention. A front view and a half side view, FIG. 6 is a schematic explanatory diagram showing the normal attachment state of the rear upper panel to the floor main, and FIG. 7 is a schematic explanatory diagram showing the tilted state of the rear upper panel attached to the floor main. 1... Rear top panel, 7... Floor main, 10, 11, 25, 26, 27a, 27b,
27c...27p...Spot welding gun, 19...
Rear upper panel carrying mechanism, 45... Rear upper panel tilting/pull-back mechanism, 46... Gauge as rear upper panel positioning means, 47, 48...
side body.

Claims (1)

[Claims] 1 Prior to joining the side body to the floor main, a rear top panel is joined to the floor main, and after the side body is joined to the floor main, the rear top panel is joined to the side body, and the rear top panel is assembled. A carry-in mechanism that carries in and positions the floor main that has been positioned; a welding gun that welds the rear top panel to the floor main; and a welding gun that welds the rear top panel to the floor main; Press the main front end side and tilt it at a specified angle.
After the installation of the side body to the floor main is completed, a tilting/pull-back mechanism that pulls the tilted rear top panel back to the normal position, a positioning means for pulling the rear top panel back to the normal position, and a side body to the floor main and a welding gun for welding to the rear top panel.