JP2817508B2 - Work assembly device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work assembling apparatus, and more particularly, to an assembling apparatus capable of replacing a jig set on a stage.

[0002]

2. Description of the Related Art An automobile assembly line performs an assembling operation of a vehicle body such as a positioning stage for positioning a workpiece to be assembled at an assembly position, and a plurality of additional driving stages for additionally positioning a positioned workpiece by spot welding. It has a large number of stages, and performs operations determined for each stage. Therefore, the work to be assembled is sequentially transferred to all the stages by the transfer bar, and the body is assembled.

In such an assembly stage,
When a failed stage occurs, a backup stage is provided to substitute that stage,
We try to minimize the drop in productivity when trouble occurs. In other words, when the normally operating stage is stopped, the assembly line can be restarted after a relatively short stop time by operating the backup stage.

FIG. 9 is a plan view of a backup stage of the additional driving stage, that is, a general backup stage S1. FIG. 10 shows a general backup stage S1.
FIG. As shown in FIG. 10, a transfer bar T, which is movable back and forth in the longitudinal direction, and transports the vehicle body W, is mounted on the general backup stage S1.
1 is installed. As shown in FIGS. 9 and 10, the general backup stage S1 includes an actuator 11 that can expand and contract in the longitudinal direction of the transfer bar T and an actuator 13 that can expand and contract in the vertical direction.
The stage S is provided with four locators 17 supported by an actuator 15 which can be extended and contracted in a direction perpendicular to the longitudinal direction of the transfer bar and a horizontal direction.
1 supports the work W placed thereon.
As described above, since the movable body locator 17 positions the vehicle body, that is, the work W, the locator 17 is moved by the actuator, so that various types of vehicle bodies W can be moved.
Can be positioned on the stage S1.

[0005] Such a general backup stage S1
In addition, an NC locator backup stage (not shown), which is a backup of the positioning stage, is generally installed on the assembly line.

[0006]

However, if the installation space of the assembly line is limited, a sufficient number of backup stages cannot be installed. For this reason, when only one space for installing the backup stage can be secured, both the general backup stage S1 and the NC locator backup stage cannot be installed. In this case, it is considered that only the general backup stage shown in FIG. 10 is installed on the assembly line. However, in this case, since the NC locator cannot be backed up when stopped, the assembly line will be stopped for a long time until maintenance or repair of the NC locator is completed. It is also conceivable to incorporate only the NC locator backup stage into the assembly line. In this case, since the NC locator backup jig has a member for positioning the vehicle body W and can be used as a backup for the general locator, the NC locator backup jig can be backed up regardless of whether the positioning stage or the additional stage is stopped. However, since the NC locator backup stage has frames on all sides, the operability is significantly lower than that of the general backup stage, and it is not suitable as a substitute for a general backup jig. In addition, no matter which means is adopted, it is necessary to separately prepare a trial jig for trial production of the vehicle body W, so that the cost is increased accordingly. The present invention has been made in view of the above problems, and can perform both a general backup and an NC locator backup without increasing the number of processes and while reducing the time required for restarting. It is another object of the present invention to provide a work assembling apparatus that does not require separate preparation of a trial jig.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a positioning stage for positioning a workpiece before temporary fixing and an additional punching stage for performing additional punching on the workpiece after temporary fixing at predetermined intervals. A transfer bar for transferring the work is set on the stage .
In a work assembling apparatus provided through a jig to be formed, a connecting portion that is detachably connected to the transfer bar is formed, and a backup stage is disposed at a position corresponding to the connecting portion, and the backup stage is mounted on the backup stage. across in a direction perpendicular to the transfer bar
A guide rail for extending the positioning stage is provided, and a positioning backup jig for the positioning stage and a general backup jig for the additional driving are movably provided on the guide rail, and the transfer bar is mutually connected at the connecting portion. A work assembling apparatus characterized in that any one of the positioning backup jig and the general backup jig can be arranged on the backup stage in a state where the jig is separated.

[0008]

By separating the transfer bar installed through the general backup jig or the positioning backup jig installed on the backup stage, and subsequently moving both or either of the separated transfer bars, the transfer bar is moved. Move the transfer bars away from each other.
Thus, any one of the jigs installed on the backup stage can be carried out, and thereafter, the other backup jig can be carried in. Thus, since the backup jig can be carried in and out freely, a plurality of backup jigs can be used in one backup stage.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. The same members as those already described are denoted by the same reference numerals. FIG. 1 is a plan view of a backup stage of the work assembling apparatus according to the present embodiment. FIG. 2 is a side view of the backup stage, and FIG. 3 is a front view. As shown in FIGS. 1 and 2, the backup stage S has three guide rails 21 extending in a direction orthogonal to the transfer direction of the workpiece W.
Is laid on the guide rail 21 so as to be movable along the guide rail 21.
And a positioning backup jig 25 are placed.
As shown in FIG. 3, the guide rail 21 is provided with a stage lock mechanism 27 and an evacuation position lock mechanism 29, so that the jigs 23 and 25 can be securely fixed at the respective positions. ing. 1 to 3
The positioning backup jig 25 is fixed to the backup stage S. As shown in FIG. 3, since the locator 17 installed on the general backup jig 23 is movable, it can be moved to a different positioning position for each work W, so that various types of works W can be positioned. ing. As shown in FIG. 2, the positioning backup jig 25 has a frame composed of a frame 31, and a holding member 33 for positioning and holding the work W is attached to the frame 31. FIG. 4 is a cross-sectional plan view showing such an NC locator in more detail, FIG. 5 is a side view thereof, and FIG. 6 is a cross-sectional front view in a direction indicated by an arrow in FIG. As shown in FIGS. 4 to 6, a large number of holding members 33 corresponding to each work are attached to the frame 31 of the positioning backup jig 25 for positioning and holding the work before assembly at the assembly position. A locator 35 for positioning the work W is attached similarly to the general backup jig 23. Although not shown, a spot welding gun can be attached to the frame 31. Since a large number of work holding members 33 are attached to the positioning backup jig 25 in this manner, the work before temporary fixing can be positioned at the assembling position, and the positioned work W is temporarily fixed by a spot welding gun (not shown). it can.
As shown in FIGS. 2 and 3, a transfer bar T is installed on the backup stage S so as to extend in the transfer direction of the work W and to be movable forward and backward.
In FIG. 3, the transfer bar T is installed so as to penetrate the positioning backup jig 25 installed on the backup stage S. As shown in FIG. 1, the transfer bar T has a connecting portion 41, and connects and separates at the connecting portion 41. FIG. 7 is an enlarged perspective view of the connecting portion. As shown in FIG. 7, the transfer bar T is separated into a front transfer bar Tf and a rear transfer bar Tb at the connecting portion 41, and at the connecting portion end 43 of the front transfer bar Tf, the left and right transfer bars are arranged in parallel. Both bars 45 and 47 are beam members 4
9 are fixed. Similarly, at the connection end 51 of the rear transfer bar, both left and right bars 53,
55 is fixed via a beam member 57. The front and rear transfer bars Tf and Tb are connected to the front transfer bar T
bolt holes 48 provided in both left and right bars 45, 47 of f
And a beam hole 57 formed in the beam member 57 of the rear transfer bar Tb by bolts. In addition, since both the bars 45 and 47 of the front transfer bar Tf and the beam member 57 of the rear transfer bar are provided with the knock pin insertion holes 61, accurate positional relationships can be established by using knock pins (not shown). The piping 63 for supplying air for operating an actuator (not shown) installed on the transfer bar T and the wiring 65 for supplying electric power are detachable by a connector 67 or a joint 69 or the like. Thus, the transfer bars T can be easily connected and separated.

Next, a procedure for installing the general backup jig 23 or the positioning backup jig 25 on the backup stage S will be described. 8 (A) to 8
(C) shows the backup stage S and the jigs 23 and 25.
FIG. FIG. 8A is a conceptual diagram showing a backup stage in a normal operating state. As shown in FIG. 8A, generally, a general backup jig 23 is fixed to the backup stage S, and the positioning backup jig 25 is fixed to a retracted position. Here, when the additional stage (not shown) of the assembly line is stopped for some reason, the general backup jig 23 fixed to the backup stage S is used as a substitute for the stopped additional stage. The line can be restarted. And
During production of the car body using the general backup jig 23, the stopped stage can be repaired or maintained.
The assembly line can be restarted after a short downtime, and once repair and maintenance are completed, it can be returned to a normal operation state in a short time.

When the NC locator is stopped, the positioning backup jig 25 is transferred to the backup stage S and fixed instead of the general backup jig 23, and used as a substitute for the stopped NC locator.
Hereinafter, a procedure for carrying the positioning backup jig 25 into the backup stage S and fixing the same will be described. FIG.
As shown in (A), a general backup jig 23 is usually fixed to the backup stage S. By first removing the bolt and the knock pin from this state, the transfer bar T is separated back and forth,
As shown in FIG. 8B, the front transfer bar Tb
To move forward. Next, the lock of the stage lock mechanism 27 is released, the lock of the general backup jig 23 locked on the backup stage S is released, and the general backup jig 23 is carried out and moved to the retreat position. At this time, since the transfer bar T has already been separated and moved out of the backup stage S, the general backup jig 23 does not interfere with the front and rear transfer bars Tf and Tb. Thereafter, the positioning backup jig 25 fixed to the retracted position is carried into the backup stage S as shown in FIG. 8C, and is fixed to the stage by the stage lock mechanism 27. Subsequently, the front transfer bar Tf is moved backward to be connected to the rear transfer bar Tb. When the transfer bar connecting portion 41 is located in front of the backup stage S, the transfer bar T is moved out of the backup stage S by moving the rear transfer bar Tb backward. After the positioning backup jig has been conveyed to the backup stage as described above, the assembly line is restarted. In this way, even if either the additional stage or the positioning stage having the NC locator is stopped, the assembly line can be restarted in a short time after the stop.

Further, as shown in the work assembling apparatus of the present embodiment, according to the present embodiment, the positioning backup jig 25 can be fixed at the retracted position separated from the assembling stage by moving along the guide rail 21. . By doing so, a work space can be secured around the positioning backup jig 25, so that adjustment of all parts can be easily performed. Therefore, when the line is not operating due to, for example, trial production, the positioning backup jig 25 can be used as a trial jig. Therefore, it is not necessary to separately prepare a trial jig as in the related art, and the cost can be reduced.

[0013]

As described above, according to the present invention, one backing can be performed without unnecessarily extending the entire length of the assembly line.
In the up stage, a general backup jig and positioning bar
A backup jig can be used. Also,
Stretch transversely to the transfer bar
General or positioning backup on guide rails
Easy by moving tools to backup stage
The line can be restarted at
It can be very short. In addition, since the positioning backup jig can also be used as a trial jig, costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a backup stage,

FIG. 2 is a side view of a backup stage,

FIG. 3 is a front view of a backup stage,

FIG. 4 is a cross-sectional plan view of a positioning backup jig,

FIG. 5 is a side view of a positioning backup jig,

FIG. 6 is a cross-sectional front view of a positioning backup jig,

FIG. 7 is an enlarged perspective view of a transfer bar connecting portion,

FIGS. 8A to 5C are conceptual diagrams showing the operation order of a backup stage;

FIG. 9 is a plan view of a general backup stage,

FIG. 10 is a side view of a general backup stage.

[Explanation of symbols]

Reference Signs List 17 Locator 21 Guide rail 23 General backup jig 25 Positioning backup jig 31 Frame 41 Connection part S Backup stage T Transfer bar Tf Front transfer bar Tb Rear transfer bar W Work

Claims (1)

(57) [Claims] 1. A stage, such as a positioning stage for positioning a workpiece before temporary fixing and an additional punching stage for performing additional punching on a workpiece after temporary fixing , is arranged at predetermined intervals, and a transfer bar for transporting the workpiece is mounted on the stage . Setting
In a work assembling apparatus provided through a jig to be placed, a connecting portion that is detachably connected to the transfer bar is formed, and a backup stage is disposed at a position corresponding to the connecting portion. A guide rail extending in a direction perpendicular to the transfer bar is laid, and a positioning backup jig for the positioning stage and a general backup jig for the additional driving are movably provided on the guide rail. the position under the state that the transfer bar has been separated from each other by the connecting portion
A work assembling apparatus, wherein either one of a fixed backup jig and the general backup jig can be arranged on the backup stage.