JPS6149152B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a marking method for automatically and accurately marking the body number of a car on the corresponding body when the car is produced on a line.

For example, in the assembly of automobiles, automobiles of different types and specifications are assembled on a common line. In this case, the vehicle model specifications, etc. are coded, and bodies of each model and specification are put on the line based on an (assembly) order chart created by arranging the symbols in order according to a predetermined production plan. , and each assembly department along the line prepares parts to be assembled based on the order table distributed in advance, and assembles and processes them onto the corresponding body that has been moved. . For this reason, each assembly department prepares the corresponding mounting parts from various parts in advance according to the assembly order listed on the order chart, but in reality, the bodies that move on the line are not in the correct order. It is necessary to check each item to see if it matches what is listed in the table before assembling or processing the correct parts. This is because, for example, a different ordered car may be produced in the middle of the assembly order specified in the order chart due to an order, so the assembly order in the order chart may differ from the actual assembly order. This is because it may become incompatible. In such case,
Changes in the assembly order are immediately communicated to each department, but if this is not done thoroughly, non-standard bodies will be produced. Furthermore, even if such changes in the assembly order do not occur, if workers in each department misread the order chart, they may select the parts to be assembled incorrectly or make incorrect processing operations, resulting in the production of non-standard bodies. It turns out.

Particularly in automobiles, it is necessary to stamp a body number on the body, and it is stamped on the body during assembly based on the above-mentioned order chart, but this stamping is done once and it is extremely difficult to correct it.
Moreover, since procedures such as car registration are performed using this body number, the stamping of the body number requires greater reliability than other processing operations.

The present invention was developed in view of these points, and while the vehicle is made to carry information such as the body number in advance, this information is automatically read during the stamping process.
The object of the present invention is to provide a marking method that can accurately mark a body number on the body by automatically setting and marking the body number based on this information.

The method for marking a body number in automobile assembly according to the present invention will be explained below.

First, to outline the automobile body assembly system to which the method of the present invention is applied, as shown in FIG. 1, the engine compartment skirt 4a, the front floor skirt 4b, and the rear floor skirt 4
Each part is supplied from c to the floor main line 1 to assemble the floor main line assembly. A label is attached in an information label attaching step 9 immediately before the engine compartment is introduced into the floor main line 1. As this information label, for example, a label 100 shown in FIG. 2 in which the vehicle type and each work instruction are parcoded can be used. A magnet 100a is attached to the back side of this label. Information is automatically read from this label 100 and the corresponding parts to be assembled are automatically selected and transported for each of the following body main lines 2 for assembling body sides, etc., and metal lines 3 for assembling doors, etc. Parts supply devices 5 and 6 are provided to assemble panels such as body side and roof, front and rear doors, etc. In addition, between these processes, a special work line 7 having a work instruction device 10 for special specification vehicles and a body number marking device 8, which is the object of the present invention, are installed, and these operations can also be performed by reading information from the label. I am trying to do it as soon as possible.

The marking device 8 is a device that stamps a body number on the body assembled on the body main line 2, and as shown in FIGS.
The output of label reading No. 1 is input to the controller 12, thereby controlling and operating the stamping machine 13. That is, to explain briefly, the output of the reader 11 is input to the controller 12, and the body number to be stamped is displayed in the upper display field 1.
4 and sends a signal to the stamping machine 13. On the other hand, the number set by the stamping machine 13 is transmitted backwards and displayed in the display column 15 at the bottom. By comparing the upper and lower display columns 14 and 15, the correctness of the stamped number can be confirmed, and the transmission of stamping commands is controlled.

The stamping machine 13 has a frame 17 placed on a rail 16.
The marking head body 19 is attached via a pin joint 20 to a frame 30b attached to a rod 18a of a cylinder 18 that hangs down. and frame 30b
A cylinder 30 is attached to the rod 3.
0a is connected to the yoke 21 via a pin 30c. The engraving head body 19 has an engaging portion 23a engaged with a groove 21b of a yoke 21 having a substantially downward U-shape.
The cowl B' of the body B is held between the yoke end 21a and the head 23 and is engraved. The head 23 has as many rotary print heads 24 as the number of digits of the body number arranged in parallel, and each rotary print head 24 is connected to a pole 26 and a feed gear 27 operated by a plunger 25a of a cylinder device 25 provided correspondingly. They are rotationally driven by cooperation, and the desired print is rotated and positioned on the front side. 28 is a reversal prevention pawl. The rotational position of the rotary printing head 24 is determined by the rotational position detection gear 2 meshed with the feed gear 27.
The rotational position is detected by a rotational position detecting means such as a rotary switch provided at 9, and is sent back to the controller 12. 26a is a leaf spring that biases the pole 26. In addition, in FIG. 4, 31 indicates a copy tape. The imaginary line in the figure shows a state in which the cylinder 30 is retracted and the yoke 21 is rotated around the pin joint 20. Under this state, the cylinder 22
Press the head 23 toward the yoke to perform marking.
In addition, in FIG. 5, 32 and 33 are cylinders 25
Indicates the port.

The method of the present invention using the marking device having the above configuration is the seventh method.
This is shown in the figure below.

First, the body number is read from the label 100 by the reader 11, and then it is determined whether the read data is formally correct as data. If there is an error, an alarm is issued, and if it is correct, the data is converted into a predetermined signal format. After conversion, the controller 12 and the marking machine 13
Send to. The controller 12 stores the body number based on the signal and displays it in the upper display column 14. In the stamping machine 13, the plunger 25a of the cylinder 25 reciprocates the necessary number of times based on the signal.
Each rotary print head 24 is set to a predetermined number.
At this time, data of each set rotary print head is detected by the action of the rotational position detecting means, and this data is sent back to the controller 12 to store the body number and display it in the lower display column 15. Then, the body numbers displayed in the upper and lower display columns 14 and 15 (actually the body numbers stored as described above) are checked, and if they do not match, an alarm is issued and the device is stopped at the same time. , if correct, sends a marking command to the marking machine 13. This signal causes
The cylinders 18, 30, 22, etc. operate in sequence to print on the body B.

Therefore, in the marking method of the present invention, while the car is loaded with body number information in advance, this information is automatically read in the marking process, and the body number is automatically set and stamped based on this information. Therefore, it is possible to quickly stamp an accurate body number on a body moving on a line.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram showing an outline of an assembly line for automobile bodies, Fig. 2 is a partially cutaway front view of a label, Fig. 3 is an overall perspective view of the stamping device, and Fig. 4 is an enlarged side view of the stamping head. FIG. 5 is an enlarged broken sectional view of the printing head, FIG. 6 is a sectional view taken along line XX in FIG. 4, and FIG. 7 is a flowchart of the stamping process. 8... Stamping device, 11... Reader, 12... Control machine, 13... Stamping machine, 19... Head body, 23
...Head, 24...Print head, 25...Cylinder, 100...Label.

Claims (1)

[Claims] 1. On the body of the car being transported through the assembly line,
Add information about the body number that should be stamped on the car,
While the body is moving along the line, the above information is read by the succession device, and the body number is set in the stamping machine based on the signal from the succession device, while the detection signal of the set body number is read by the A method for stamping a body number in automobile assembly, characterized in that the stamping work is carried out by checking the signal from a reading device.