JPH0227953B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marking device, and particularly to a device for marking a plurality of characters, marks, etc. on a curved surface, and can be used, for example, to stamp a curved surface of a gas cylinder as shown in FIG.

Conventionally, when stamping a certain number of characters, marks, etc., a specially manufactured stamping tool (Fig. 2) with the characters, etc. engraved in a concave or convex manner was created, and this stamping tool was hammered into the stamped area. The desired engraving process is applied.

However, when there are a large number of characters, etc. in the direction of the curved surface, the amount of reduction of each printing portion 11, 11 to the stamped surface 2 changes greatly between the center portion and both end portions. That is, the amount of reduction is large in the center portion, and the amount of reduction is small at both end portions, making it impossible to make clear markings over the entire area.

In other words, even if an impact force or load is applied in one direction to the main body 1 of the marking, the amount of movement of the printing part in the direction parallel to the direction of these forces is constant over the entire area, but the movement of the printing part on the surface to be marked The depth of penetration is not constant, being deeper in the center and shallower at both ends.

In the central part, the printing part 11 advances perpendicularly to the marking surface 2, but as it goes to both ends, the printing part 11 advances obliquely to the marking surface 2, and the printing part 11 advances at a right angle to the marking surface 2. This is because the amount of biting in the direction perpendicular to 2 becomes shallow.

An object of the present invention is to ensure that the amount of biting and biting force of the printing part on the stamped surface at each part are constant in order to prevent the marking from becoming unclear as it approaches both ends. do.

The technical means of the present invention for solving the above problems is to form a closed chamber containing an incompressible fluid in the main body, and arrange stamping tools on the tip side of the main body, so that each stamping tool can be independent. The marking tool or a part of the intermediate shaft that contacts the base of the marking tool protrudes or faces into the fluid storage chamber in an airtight outer periphery.

The above technical means of the present invention interact as follows.

Mechanically, each marking tool is in contact with the main body via a fluid (incompressible) object. Therefore, when the surface to be marked is a curved surface, the tool located in the center of the group of marking tools is recessed, and the marking tools located at both ends are advanced through the fluid. This is because each marking tool is connected via a fluid inside a closed chamber, so when one is pushed in, the other moves out.

Therefore, the printing portion at the tip of each marking tool contacts the curved surface of the marking surface.

When an impact force or thrust force is applied to the main body in this state, this force is directly or indirectly transmitted to the marking tool via the fluid inside the closed chamber, and since this fluid is incompressible, each An equivalent marking force is applied to the marking tool.

At this time, the engraving tool in the center and the engraving tools on both ends can be differentially operated, and if you look at it minutely, the engraving tool in the center is slightly recessed into the main body and a certain engraving force is generated. On the other hand, it is also possible to perform an operation in which a constant marking pressure is generated at both ends in a state in which they slightly protrude from the main body.

Based on the above-mentioned effects of the technical means of the present invention, the present invention has the following unique effects.

Since a constant stamping force is applied to the plurality of stamping tools during stamping, that is, until the amount of penetration of the printing part into the surface to be stamped becomes constant,
Since each marking tool is pressed down on the surface to be marked, the markings on any part will be clear.

Furthermore, since each marking tool is arranged in such a way that one marking tool goes in and the other goes out, the printing parts are arranged to follow the shape of the curved surface, so it can accurately correspond to curved surfaces where the curvature is not constant.

Hereinafter, details of embodiments of the present invention will be described based on the drawings.

In the embodiment shown in FIG. 3, tool accommodation holes 7, 7 are provided at the distal end of the main body 3, and the engraving tools 4, 4 are individually and slidably accommodated in these holes. A closed chamber 9 containing oil 8 as a fluid is provided in the middle of the main body 3, and a through hole is provided that penetrates into the closed chamber 9 from the bottom of the tool accommodation holes 7. The slide pins 5, 5 are inserted through the outer periphery in an airtight state.

In this case, when the printing parts 11, 11 are brought into contact with the surface to be marked 2 and an external stamping force is applied to the main body 3, a stamping force is applied along the path of oil 8 → slide pin 5 → stamping tool 4.

Note that since the marking tools 4, 4 are only inserted into the tool accommodation holes 7, 7 from their open ends,
By preparing various other similar marking tools, it is easy to change the marking marks or characters.

Furthermore, since each printing part 11 of this marking tool is formed with a slightly convex tip surface 12 as shown in FIG. 4, when marking force is applied to each tool,
First, it bites into the stamped surface 2 from the center of the tip surface. Therefore, it is possible to eliminate the inconvenience that occurs when the entire tip surface is in contact with the surface to be engraved 2 at the same time, that is, the inconvenience that this abutting portion is recessed over the entire area, making it impossible to make clear markings (printing).

This is because the central part of the circle is engraved (printed), and then the peripheral area is engraved (printed), so that the marking force acts intensively on a narrow range and does not cause deformation of the surface 2 to be engraved. (This can also be used for marking tools other than the present invention.) In this embodiment, oil 8 is placed in the closed chamber 9 in the main body 3.
Although the liquid is filled with water, other liquids such as water may be used, and low melting point alloys may also be used.

In the case of a low melting point alloy, the temperature of the main body 3 may be raised to its melting point during stamping. For this reason, it is possible to adopt a configuration in which the main body 3 is provided with a heater.

Therefore, the fluidity in the present invention is at least
Any substance may be used as long as it has fluidity (incompressibility) at the time of processing, and other substances other than these can also be used as long as they satisfy the above conditions.

Next, regarding the configuration of the vacant room 9, a configuration as shown in FIG. 5 may also be adopted. In this case, a storage chamber 13 is provided separately from the empty chamber 9, and these are communicated by a communication passage 15 into which a check valve 14 is inserted.

This is convenient because when the fluid in the chamber 9 is exhausted and reduced, the fluid can be replenished by forcibly opening the check valve.

Although each of the embodiments shown above does not explain the marking external force applying device, the marking tool of each embodiment may be directly struck with a hammer or the like, or a thrust applying device using hydraulic pressure or the like may be used. It is also possible to attach this marking tool to the As this latter thrust applying device, for example, as shown in FIG.
It is possible to adopt a configuration in which the main body 1 is attached to the drive shaft 17.

In this case, if the frame 15 is heavy, and
If the thrust force by the hydraulic cylinder 16 can be instantaneously applied, it is not necessarily necessary to attach the frame 15 to the member to be marked.

[Brief explanation of drawings]

Figure 1 is an external view of an example of an object (gas cylinder) to which the present invention is applied, Figure 2 is an explanatory diagram of a conventional example, and Figure 3 is an explanatory diagram of a conventional example.
The figure is an explanatory diagram of an embodiment of the present invention, Fig. 4 is a detailed diagram of a marking tool used therein, Fig. 5 is an explanatory diagram of main parts of another embodiment, and Fig. 6 is an explanation of actual use of each of the above embodiments. In the figure, 3... Main body, 4... Engraving tool, 5... Slide pin, 6..., 7... Tool accommodation hole, 8... Oil, 9
……Vacancy.

Claims (1)

[Claims] 1 Arrange multiple printing parts for marking on one end of the main body,
In a device that applies an external force to the main body and applies a force from this external force to the printing part, characters, marks, etc. corresponding to the printing part are stamped on the marking surface,
A closed chamber containing an incompressible fluid is formed in the main body, and a marking tool is arranged on the tip side of the main body so that each marking tool can slide independently. A marking device in which a part of the intermediate shaft that contacts the base protrudes or faces into the fluid storage chamber in an airtight outer periphery.