JP2989587B1 - Automotive main body jig - Google Patents

Abstract

A member for fixing a component part of an automobile main body is located outside, so that the member has become an obstacle in a welding operation or the like. A vehicle main body jig includes a transfer device 1 for transferring a vehicle main body and components of the vehicle main body, an elevating device 2 for lifting and lowering an underbody jig of the vehicle main body, and an upper base 3.
And a plurality of posts 5 suspended from the upper base 3
And arms 6 rotatably provided on each post 5
And a piece 7 rotatably provided on the arm 6.
By fixing the components of the vehicle main body from the inside by a plurality of pieces 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main body for an automobile, which is a device for fixing components (parts) of the main body at an accurate position when the main body of the automobile is assembled by spot welding, arc welding or the like. About jigs.

[0002]

2. Description of the Related Art Generally, a main body of an automobile is composed of components (parts) previously assembled by spot welding and arc welding, that is, left and right side members.
The underbody, cowl, upper back, lower back and roof are connected and fixed by spot welding, arc welding and the like. To assemble these vehicle main body components, the vehicle main body jig is used to fix each of the components transported from the previous process in the correct position, and the entire vehicle main body assembled is assembled. Accuracy is ensured.

A conventional automobile main body jig has a frame (frame) 1 in which respective components conveyed from a previous process are provided outside the respective components as shown in FIG.
00 and a large number of members 101 attached to the frame 100 are clamped and fixed. These frames 1
No. 00 has a structure in which, when the automobile part 102 is clamped or pressed by the piece 101, the part is shifted inward and the part is clamped or pressed from the outside and fixed.

[0004]

In order to fix the components of the vehicle main body from the outside, there are a number of frames attached to the outside of the main body and fixed to the frame to fix each part at an accurate position. There were a piece, a member and a device for rotating and moving a large number of pieces.

[0005] Therefore, when an operator welds and fixes components assembled at precise positions by spot welding or arc welding, members such as frames and pieces located outside the components are required. However, there was a structural problem that it hindered welding work. For this reason, for example, when the welding position is located on the back side of the column of the frame, it is necessary to bend the shape of the spot gun used for spot welding so as to avoid the column and perform welding. In addition, there is a problem that it is difficult to improve work efficiency because welding work is required in an unnatural posture for an operator in some places.

Further, since a work space is divided by frames and members, it is necessary to arrange a spot gun for each space, which is inefficient and uneconomical.

[0007] Further, when the assembly process of the component parts of the automobile main body is to be performed automatically by a robot or the like, the outer frame, the members attached thereto, and the device require the robot. There is a problem that the movement is restricted and the working range of the robot is narrow and inefficient.
In order to cover this, it is necessary to arrange robots for each work space, and the number of robots has increased and was uneconomical.

[0008] Further, since the conventional automobile main body jig is generally dedicated to the type (model) of the automobile to be produced, the automobile main body jig is changed along with the model change (model change). All the jigs had to be changed, which was uneconomical and difficult.

In addition, there is another problem that it is difficult to perform the accuracy inspection of the automobile main body after welding because of members and devices located outside the automobile main body.

[0010]

In order to solve these problems, a vehicle for transporting a vehicle main body and components of the vehicle main body, a lifting device for lifting and lowering a jig for an underbody of the vehicle main body, and the like. , An upper base, a plurality of posts hanging from the upper base, and an arm rotatably provided on each post,
A main body jig for an automobile is proposed, comprising a piece rotatably provided on an arm, wherein a plurality of pieces fix components of the vehicle main body from inside.

[0011] Also, a vehicle main body and a transport device for transporting the components of the vehicle main body, an upper base, a plurality of posts suspended from the upper base and capable of moving up and down, and an arm rotatably provided on each post. The present invention proposes a main body jig for an automobile, comprising a piece rotatably provided on an arm, wherein a plurality of pieces fix components of the vehicle main body from inside.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing one embodiment of the present invention, that is, FIG. 1 showing a plan view of a main body jig for an automobile, FIG. 2 also showing a front view, and FIG. Explanation will be made based on FIG. 4 showing an enlarged operation explanation of the pole, arm and piece of the automobile main body jig.

[0013] The automobile main body jig of the present invention comprises:
The components of the car main body are transported from the previous process,
Further, a transport device 1 for transporting the assembled automobile main body B to a post-process, an elevating device 2 for elevating and lowering a jig 20 for an underbody of the automobile main body B, an upper base 3, and a plurality of supporting the upper base 3. Frame 4, a plurality of posts 5 hanging down from the upper base 3, arms 6 rotatably and detachably mounted on each post 5, and rotatable and detachably mounted on each arm 6. And a piece 7 to be provided.

The transport device 1 is composed of a roller conveyor (roller conveyor). The roller conveyor has freely rotating rollers, and has two roller conveyors that have no central portion and are parallel to each other on the left and right. The components other than the roof of the automobile main body B, that is, the left and right side members, the underbody, the cowl, the upper back, and the lower back are temporarily assembled with a hand vice or the like to form a body, and the body is pushed by a worker or by an automatic conveyor. It is transported on a roller conveyor.

The lifting device 2 is provided between the left and right roller conveyors of the transfer device 1. The elevating device 2 of this embodiment includes:
A horizontal plate 21 on which the underbody jig 20 is placed is provided at the upper part, and the plate 21 is moved up and down by an X-shaped lift 22 operated by a driving device such as a hydraulic pressure. The underbody jig portion 20 of this embodiment is formed of a cart, and is conveyed on a traveling ground lower than the conveying device 1.

As another embodiment, the underbody is conveyed by the roller conveyor of the conveying device 1 and placed on the underbody jig 20, and the underbody jig portion 20 of the elevating device 2 is moved to a predetermined position by the plate-like body 21 of the elevating device 2. Rise,
The underbody is fixed to the underbody jig portion 20 and stopped at the welding operation position.

When the underbody jig portion 20 is lifted and fixed by the elevating device 2, the jig portion 20 is fixed by pins provided between the four pillars of the frame 4 and the V block 40, and is lowered to the lowest position. In this state, the vehicle further descends from the left and right roller conveyors and stops on the running ground lower than the roller conveyor.

The frame 4 is composed of four columns in this embodiment. The four frames 4 are erected outside the right and left roller conveyors of the transport device 1.

The upper base 3 is supported between the upper portions of the four columns of the frame 4 and spans over the transport device 1 and the elevating device 2.

Several posts 5 are suspended from the upper base 3. The post 5 is formed in a columnar shape, and is fixed to the upper base 3 and hangs down in this embodiment, but may be rotatably hanged on the upper base 3. In this embodiment, the right and left posts 5 are combined, and a total of three sets of six posts are vertically provided, but can be increased or decreased. The length of the post 5 in this embodiment is
The pair is relatively long, and the lengths of the center and rear pairs are shorter than the front pair and are the same length.

An arm 6 is provided on each post 5 so as to be rotatable and attachable / detachable. The number and length of the arms 6 and the position of attachment to the post 5 are predetermined in accordance with the type of vehicle, and the number, length and attachment position of the arms 6 are changed by changing the type of vehicle. An arm sillder 60 is horizontally installed between the respective arms 6 provided on the pair of right and left posts 5. The arm silder 60 is formed of an air cylinder, a hydraulic silder, or the like, and rotates in the horizontal direction with respect to each of the set of posts 5 by the expansion and contraction of the sill rod. Each arm 6
A piece mounting portion 62 is provided on the distal end side of the arm 6 so as to be rotatable with respect to the arm 6 using the vertical arm shaft 61 as a rotation axis and to be detachable. The piece mounting part 62 rotates about the arm shaft 61 with respect to the arm 6 by the expansion and contraction of the rod of the piece rotating sillder 63 horizontally fixed to the arm 6.

The piece 7 is attached to the tip end of the piece attaching portion 62. The piece 7 is fixed to the piece attaching portion 62 and the piece attaching portion 6
Rotate according to 2. The piece 7 is a plate-like body having a flat shape conforming to the inside shape of each component of the automobile main body, and the clamp 70 is rotatably attached to a part of the plate-like body. The clamp part 70 is rotatable with respect to the bridge 7 via a rotation shaft 71, and one end is rotatably attached to a cylinder rod of a clamp cylinder 72. The piece 7 clamps the components of the vehicle main body by the rotation of the clamp 70. The clamp sillder 72 is fixed to a part of the bridge 7 in a horizontal state. As another embodiment of the clamp unit 70, it is possible to manually clamp using a burr clamp or the like instead of the clamp cylinder 72.

Next, the operation and use of the automobile main body jig according to the embodiment of the present invention will be described.

Each component other than the roof of the main body B of the automobile is transported to the automobile main body jig by the transport device 1. In the case of a trolley, the underbody jig section 20 puts the underbody on the trolley in advance, travels on the ground, and stops at a predetermined position. When the underbody jig portion 20 is a narrow plate, the underbody conveyed on the left and right roller conveyors of the transfer device 1 is moved to the position of the plate that moves up and down between the left and right roller conveyors. When the X-shaped elevating device 2 is lifted from below, the bogie or the plate is pushed up and stopped at a predetermined position in the welding operation, and the bogie or the plate is fixed by the pin and the V block.

Next, the plurality of arms 6 provided on each post 5 are rotated outward by extending the arm cylinder 60. Further, the position of the piece 7 is rotated left and right by expansion and contraction of the piece rotating cylinder 63, and the piece 7 is positioned at a predetermined position.

Next, the clamp cylinder 72 is extended to clamp an appropriate part of the automobile component. At this time, the bridge 7, which is a clamp member of the vehicle main body jig, and the arm 6, which is a member for moving the bridge 7, are located inside the vehicle main body components, and can be pressed or clamped from the inside.

After the welding operation, the clamp cylinder 72 is contracted, the clamp is released, the bridge 7 is moved, and the arm 6 is rotated inward. The vehicle main body thus assembled is separated from the vehicle main body jig except for the underbody.

Next, the elevating device 2 is lowered, and the assembled automobile main body is moved to the underbody jig 2.
If 0 is a trolley, it is lowered to the ground as it is and transported to the next process while being placed on the 20 underbody jig.
When the underbody jig 20 is a plate, the transfer device 1
The vehicle main body is lowered to the upper side, and is conveyed to the next process by the conveying device 1. Only the roof among the components of the automobile main body is welded and assembled in the subsequent steps.

Next, a description will be given of an automobile main body jig according to another embodiment of the present invention. In another embodiment, the transport device 1 for transporting the components of the vehicle main body B from the previous process and transporting the assembled vehicle main body B to the subsequent process, the upper base 3, and the upper base 3 are supported. Frames 4 and a plurality of vertically movable posts 5 suspended from the upper base 3
And arms 6 rotatably provided on each post 5
And a piece 7 rotatably provided on each arm 6.

In this embodiment, the post 5 is movable up and down with respect to the upper base 3 which is erected and fixed to the frame 4. In another embodiment, the upper base 3
However, the post 5 itself may be fixed to the upper base 3 because it is configured to be vertically movable with respect to the frame 4.

The post 5 moves the transport device 1 in the lowered position.
The components of the main body of the automobile conveyed by the arm 6 and the arm 7 are rotated, clamped and fixed. When transporting the automobile main body B welded after spot welding and arc welding, the clamp 7 of the automobile 7 is released, the arm 6 and the arm 7 are rotated and the post 5 is raised, and the automobile main body B is lifted. B is transported on the transport device 1 to the next step. The roof is welded and assembled after the next step.

[0032]

As described above, a piece which is a member for holding or clamping a component of a main body jig for an automobile, and a member for moving the piece are almost inside the main body of the automobile, and are pressed or clamped from the inside. Therefore, welding work such as spot welding and arc welding of components from the outside, and other works are very easy to perform, and work efficiency is greatly improved.

Further, since the number of members and devices obstructing the outside of the main body of the automobile is reduced, the work space becomes a continuous and wide work place, so that the number of welding tools such as spot guns and work tools can be reduced. Work efficiency was improved. When automating the operation of assembling the components of an automobile main body using a robot or the like, since there are no members or devices obstructing the outside, it is easy to install a device such as a robot and the necessary minimum. The operation can be performed with the same number of robots, which is economically superior.

Further, when changing the model of a car to be produced (model change), it is not necessary to change all the jigs of the main body of the car. Since it can be dealt with only by changing the parts such as changing the mounting position, the work at the time of the change becomes easy, and it can be performed economically at a low cost.

Further, there is an effect that the accuracy inspection performed after assembling the main body of the automobile becomes very easy because there are no obstructive members or devices on the outside.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of a main body jig for an automobile.

FIG. 2 is an explanatory front view of the same.

FIG. 3 is an explanatory side view of the same.

FIG. 4 is an enlarged explanatory view of a pole, an arm, and a piece of an automobile main body jig.

FIG. 5 is an explanatory side view of a conventional automobile main body jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying device 2 Elevating device 20 Jig for underbody 21 Plate-shaped body 22 X-shaped lift 3 Upper base 4 Frame (pillar) 40 Pin and V block 5 Post 6 Arm 60 Arm cylinder 61 Arm axis 62 Frame mounting part 63 Frame rotation Cylinder 7 pieces 70 Clamp section 71 Rotation axis 72 Clamp cylinder B Main body of automobile

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B62D 65/00 B23P 19/00 302 B23P 21/00 303

Claims (2)

(57) [Claims] A transport device for transporting a vehicle main body and components of the vehicle main body; a lifting device for lifting and lowering an underbody jig of the vehicle main body;
An upper base, a plurality of posts hanging from the upper base, an arm rotatably provided on each post, and a piece rotatably provided on the arm, and an arm which is a member for moving the plurality of pieces; A main body jig for a vehicle, wherein a plurality of posts provided with arms rotatably are positioned inside the vehicle main body to clamp and fix components of the vehicle main body from inside. 2. An automobile main body and a transport device for transporting components of the automobile main body, an upper base, a plurality of posts suspended from the upper base and capable of moving up and down, and an arm rotatably provided on each post. A main part of the vehicle main body by positioning an arm, which is a member rotatably provided on the arm, and a member for moving the plural pieces, and a plurality of posts for rotatably mounting the arm inside the vehicle main body. A main body jig for an automobile, characterized in that it is clamped and fixed from the inside.