JPS6116136Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mechanism for preventing damage to stamped characters on a mark blank (dial) in a device for stamping serial numbers on automobile chassis, engines, etc.

Automobile manufacturers usually use stamping devices to stamp serial numbers on chassis, engines, etc., but at that time, they are required to punch out and save the stamped numbers on recording paper or tape. The above-mentioned engraving device has a ring-shaped mark blank for the required number of digits in the engraving head, and automatically selects and engraves the engraving characters (mainly numbers and symbols) formed in protrusions on the circumferential surface of the ring-shaped mark blank. It's becoming like that. Some of the engraved characters on the mark blank, such as 0, 4, 6, 8, and 9, have portions surrounded by a character wall, and when these characters are engraved, the recording paper Or the punched pieces of paper tape may become jammed. In order to prevent this paper jam, an elastic material such as rubber is attached to the bottom of the engraved characters so that the tip of the material almost matches the surface of the characters, and the piece of paper punched out by the stamping is bounced back by the elastic material. There is something. However, the area surrounded by the engraved characters is closed by the surface to be engraved during engraving, and the air trapped inside is compressed, so a large force acts on the character wall of the engraved characters. There was an accident that caused damage.

This idea is to create a hole inside the mark blank with an elastic material attached to the bottom of the stamped character part to prevent paper jams, open one end of the hole to the stamped character part, and open the other end to the outside. This completely eliminates the above-mentioned problems of the conventional example by discharging the compressed air and moisture and oil adhering to the character portions to the outside of the mark blank.

Hereinafter, this invention will be explained in detail with reference to the illustrated embodiment. Reference numeral 1 denotes a mark blank, and engraved character portions 2 are formed on the circumferential surface of the mark blank at predetermined intervals. Reference numeral 3 denotes an elastic material made of rubber or the like attached to the bottom of the engraved character part 2 to prevent paper jams, and when the engraved characters are numbers, it has a part surrounded by the character wall 2a, i.e. ,0,4,6,
It is attached to the enclosed portions of numbers 8 and 9, and its end surface is approximately at the same level as, or slightly lower than, the end of the character wall 2a. Reference numeral 4 denotes a hole provided inside the mark blank 1, and in the case shown in the figure, there is a vertical hole extending from the bottom of the engraved character part 2 to the shaft hole 1a of the mark blank 1, and a hole extending from the middle part of this vertical hole to the side surface of the mark blank 1. It has a T-shaped structure with a horizontal hole that passes through.
The hole 4 may be a communicating hole having one end opening into the engraved character portion 2 and the other end opening outside the mark blank 1, and is not limited to the structure shown.

This invention is constructed as described above, and as shown in FIG. 3, by rotating the ratchet 5, which is fixed coaxially with the mark blank 1, one pitch at a time using a feed pawl (not shown), The character to be engraved is selected, placed facing the member 6 to be engraved, and engraved with recording paper or tape paper 7 interposed.
Even if the engraved characters have a portion surrounded by the character wall 2a, damage to the engraved characters can be prevented. That is, at the time of engraving, the air in the area surrounded by the character wall 2a is momentarily compressed, but is sent from the bottom of the character part into the hole 4, passes through this hole, and forms the mark blank. This is because it is discharged to the outside of 1.

On the other hand, the punched piece of recording paper or tape paper 7 is pushed into the area surrounded by the character wall 2a, but is bounced back by the elastic material 3, so that paper jams can be prevented and the holes 4 can be filled. The opening is never blocked. Also, the letter wall 2a
There are cases where moisture or oil adheres to the area surrounded by the markings and does not drip even when the engraved character part 2 is facing downward. However, with this invention, the moisture and oil that adhered to the area surrounded by the air compressed during stamping can be removed. is forced into the hole 4 and discharged to the outside of the mark blank 1, so that
The engraved character part 2 can be kept clean at all times.

As explained above, this invention has communication holes in the mark blank to allow compressed air, moisture, oil, etc. to escape, which prevents the engraved characters from being damaged and ensures clear engravings. Excellent effects such as extending the lifespan of the product can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a schematic front view of the mark blank, Fig. 2 is an enlarged sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an explanatory diagram of the state of use. It is. 1... Mark blank, 2... Engraved character section, 2
a...Character wall, 3...Elastic material, 4...Hole.

Claims (1)

[Scope of utility model registration request] In an embossing device in which an elastic material is attached to the bottom of the engraved character area formed on the circumference of the mark blank to prevent paper jams, one end opens into the engraved character area and the other end opens to the outside of the mark blank. A mechanism to prevent damage to engraved characters characterized by holes provided in the mark blank.