JPS5931422Y2 - Embossing depth control mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for engraving characters and symbols on product nameplates, etc., and provides a mechanism that can control the depth of the engraving to a preset constant dimension. It is something to do.

When engraving characters on a name plate or the like, the depth of the engraving is specified depending on the size of the characters, and it is required that the engraving depth be constant to the specified dimensions.

Conventionally, the embossing depth has been controlled by changing the stroke of a type ring, type punch, etc., the stroke position, the magnitude of the embossing force, etc.

However, these values vary depending on conditions such as the material and thickness of the work to be stamped, the guide mechanism, etc., so it is difficult to obtain a specified stamping depth with high precision, and the depth is not constant.

The present invention solves these problems with conventional devices,
Stamping depth IS that allows the marking depth to be a specified constant dimension and to easily and reliably change and set the marking depth.
The purpose is to realize the mechanism.

In order to achieve this purpose, the present invention places an embossing tool such as a type ring or a mark punch with the type face down above a table on which an item to be engraved such as a name plate is placed, and
A stopper is placed on the side of the table, and the table is driven up and down via a spring mechanism.

Next, an embodiment of the embossing depth control mechanism according to the present invention will be described based on the drawings.

1 and 2 are longitudinal sectional views showing a first embodiment of the present invention, in which FIG. 1 shows the state before stamping, and FIG. 2 shows the state at the moment of stamping.

Reference numeral 1 denotes an item to be stamped, such as a name plate, which is placed and held on a table 2.

The table 2 is mounted and supported by a support device such as a support stand 3.

An engraving tool 4 is disposed above the nameplate 1 with typefaces 5 facing the nameplate 1, and a stopper 6 is provided on the side of the engraving tool 4.
is installed.

The type face of the embossing tool 4 projects downward by δ from the lower end of the stopper, and in this relationship, the embossing tool 4 and the stopper 6 are both fixed to the device frame or the like.

An engraving machine 7 is disposed below the chiffle 2, and is driven up and down by the rotation of an eccentric shaft 8 therebelow.

9 is a guide that guides the vertical movement of the frame 7.

A stud is disposed between the hammer 1 and the table 2, and its foot 10 is vertically movably inserted into the window hole 11 of the hammer 7, and a preload nut 12 is screwed and fixed to the tip. There is.

The head 13 of the stud-like body is connected to the hammer head, and a preload spring 14 formed from a compression coil spring is interposed between the hammer head 13 and the hammer 7.

In other words, by sufficiently tightening the preload nut 12 and compressing the preload spring 14 in advance, the meter head 13 is constantly pushed up by the spring pressure, and a force greater than this spring pressure...
When acting on the pump head 13, the pump 7 is pushed up against the pump head 13 against the preload banner 14.

Next, the marking operation will be explained.

As shown in Fig. 1, the stamper 9 is lowered by the eccentric shaft 8, and with the table 2 supported by the support stand 3, the object 1 to be engraved, such as a name plate, is fed onto the table 2 and placed in a predetermined position. position.

Then, when the eccentric shaft 8 is rotated, the lever 7 is pushed up, and the head 13 pushes up the chifur 2.
By further pushing up the table 2 where the stamped item 1 touches the type 5, the type 5 bites into the stamped item 1, and as the table 2 continues to rise, the stamped item 1 hits the stopper 6. As a result, the table 2 and the stamped workpiece 1 cannot be raised any further.

Normally, the stamp 7 is pushed up a little further, but the stamp 7 is only pushed up against the preload spring 14, and the stamp head 13, the table 2 above it, and the stamped product 1 rise. do not.

FIG. 2 shows the state in which the hammer 7 has risen to the top dead center in this way, and as the eccentric shaft 8 further rotates, the hammer 7 begins to descend, and the top end of the window hole 11 reaches the preload nut 1.
When the table 2 contacts the support base 3, the table 2 and the workpiece 1 stop descending.

Then, only the hammer 7 and the hammer head 13 descend to the bottom dead center and stop, thereby completing the stamping operation.

Pl: Force required for the type 5 to bite into the item 1 to be stamped P2: Preload of the preload spring 14 P3:...If the pressing force is I, as is clear from the above operation, P1≦ P2
It is designed to have a relationship of <P3.

Furthermore, since the difference in level between the type 5 and the stopper 6 is δ, the embossing depth is also δ.

If the dimension between the table 2 and the stopper 6 is S, then the maximum plate thickness that can be engraved is S-δ'', that is, the distance T between the table 1 and the type 5.

When g is the dimension between the table 2 and the hammer head 13, the stroke of the hammer 7 is set to be tt"S+g".

As a result, stamping can be performed on products having a thickness t of about 0 to Tmw.

In this way, since the stamped product 1 with a certain plate thickness t is interposed between the table 2 and the stopper 6, the hammer head 13 is
When the product 1 to be stamped comes into contact with the stopper 6, it cannot rise any further, and from then on, the stamp 7 rises to the top dead center without compressing the preload spring 14.

As mentioned above, the type 5 and the stopper 6 are fixed to the device frame etc. so that the step difference δ is maintained, and the hammer stroke is S+g'', so the material of the stamped item 1, etc. Regardless of the conditions of the guide section, changes in the guide section over time, etc., the engraving is always forcibly made so that the engraving depth δ remains constant.

Moreover, it is not affected by the plate thickness t of the product 1 to be stamped.

The stopper 6 can be attached to the device frame, etc. by preparing several types with different dimensions from the bottom to the bottom and replacing them, or by making the stopper 6 movable up and down. It is also possible to change the embossing depth δ.

FIG. 3 is a front view showing the second embodiment of the present invention, and FIG. 4 is a sectional view taken along line A-A' in FIG. is attached.

In this case, as an embossing tool, a type ring 4' having a large number of type characters on the outer periphery of a disk is attached to a rotating shaft 15, and is mounted on two left and right arms 16, 16' that protrude horizontally from the device frame. A stopper 6' is placed and fixed on.

In this example, a pallet 2a is used as a means for placing and holding the stamped product 1, and this pallet 2a is placed and fixed on a vertically movable table 2b.

The table 2b is rotatably supported by a support shaft 16, pulled downward by a tension spring 17, and supported by a support stopper 3'IC.

The hammer head 13' has a cylindrical shape and is attached to the hammer 7 with a bolt 18 inserted through a through hole thereof, with a preload spring 14 interposed therebetween.

...The mass drive unit consists of an eccentric ring 8' fitted and fixed to the shaft 19, and when the eccentric ring 8' rotates once,...
・The hammer 7 moves up and down along the guide 9, and the hammer head 1
Move 3' up and down.

Therefore, this embodiment is substantially the same as the embodiments shown in FIGS. 1 and 2, and embossing is performed at a constant depth determined by the step between the stopper 6' and the type surface of the type ring 4'.

When stamping with a type ring having a different size of type, first remove the stopper 6', then loosen the nut 20 and replace the type ring 4' with a type ring of a different size.

Then, the stopper is replaced with a stopper whose dimension between the attachment portion to the arms 16 and 16' and the lower end of the stopper corresponds to the size of the typeface.

The base on which the table 2b is supported is mounted on an X-Y table (not shown), and each time one character is stamped, a certain amount of the stamped item 1 is removed by the X-Y table. At the same time, the type ring 4' rotates to select and print the next type.

In both the eleventh and second embodiments, the actuator I is driven vertically by an eccentric shaft or an eccentric ring, but it goes without saying that it can be driven by other actuators such as an air cylinder or an electromagnet.

As described above, according to the present invention, an embossing tool such as a type ring or a mark punch is placed above a table on which an item to be engraved such as a name plate is placed and attached, with the type facing downward;
A stopper is disposed on the side thereof, and the table is configured to be driven up and down via a preload spring to which a preload force sufficient for stamping is applied.

Therefore, when the part to be stamped comes into contact with the stopper, the depth of the stamp is forced to be the same, and the depth of the stamp is always maintained regardless of the material, thickness, or other conditions of the part to be stamped. becomes constant.

In addition, by simply replacing the stopper or adjusting the top and bottom positions of the stopper, you can accurately change and set the engraving depth, making it easier to configure than conventional methods that adjust the stroke amount, stroke position, and engraving force. become.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views showing the first embodiment of the present invention,
Figure 3 is a front view showing the second embodiment, and Figure 4 is A of Figure 3.
-A' sectional view. In the figure, 1 is the item to be stamped (nameplate), 2 and 2b are tables, 4 and 4' are stamping tools, 5 is typeface, and 6 and 6'? d stopper, 7 is hammer, 13/13' is hammer head 9
．． 14 is a preload spring.

Claims (1)

[Scope of utility model registration request] An embossing tool is placed above the support table on which the item to be engraved, such as a name plate, is placed and supported, with the type facing downwards, and the embossing tool is retracted from the type surface by the amount of the embossing depth to the side. A depth setting stopper is provided, and the support table is moved up and down via a preload spring that is given enough preload force for stamping until the workpiece to be stamped comes into contact with the stamping depth setting stopper. An embossing depth control mechanism characterized by comprising means for controlling the embossing depth.