JPH0213115Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marking device, and more particularly to a marking device that can clearly mark according to the curvature of a surface to be marked.

In a marking device that is equipped with a plurality of marking parts such as paint spray guns or felt pens and marks with dot characters, a felt pen 1 as shown in FIGS. 1 and 2 is an example of a marking device having a felt pen as the marking part. The attached core 2 is slidably attached inside the main body 3, and a plurality of marking elements 5 are provided, as shown in FIGS. 3 and 4, in which the core 2 can be selectively operated in the vertical direction in the figure using a solenoid 4. Arrayed devices are known. This device is operated to selectively bring the felt pen 1 into contact with the surface of the material to be marked M while moving relatively in the direction of the arrow A, thereby creating dot characters. In particular, in order to reduce the dot spacing, the felt pens 1 are arranged so as to be shifted in the direction of movement and adjacent to each other in the lateral direction. This makes it possible to mark continuous dots P as shown in FIG. 5, for example.

In such a marking device, if the material to be marked has a curved marking surface, such as a pipe or a coil, the distance between each felt pen 1 and the marking surface may not be constant, and the marking may become unclear. There is. Particularly when marking several digits in the axial direction of a small diameter pipe, etc., if the tip of the marking part of the central spray gun or felt tip pen that forms one character is set at a predetermined distance, the end spray gun or A marking unit such as a felt pen is undesirable because the distance from the marking surface is large, and the direction of its operation deviates from the perpendicular direction of the surface, resulting in marking (dot formation) in an inclined state.

An object of the present invention is to provide a marking device that overcomes these conventional drawbacks.

That is, the present invention is intended to solve the above-mentioned drawbacks by configuring the operating direction of each of the marking elements to be adjustable perpendicular to the marking surface and at a constant distance from the marking surface.

To this end, the present invention provides for adjacent marking elements to be rotatable relative to each other in a direction (lateral direction) perpendicular to the direction of relative movement during marking operation, thereby allowing each marking device to adjust its curvature according to the curvature of the marking surface. It is characterized by being configured so that it is oriented toward the center in a direction perpendicular to the curved surface and at a constant distance from the curved surface.

Embodiments of the present invention will be described below with reference to the drawings.

The marking device shown in FIGS. 6 to 8 has a first
As shown in the drawings and FIG. 2, five marking elements 5 each having a felt pen 1, a core 2, a main body 3, and a solenoid 4 are provided. In particular, according to a feature of the invention, these marking elements 5 are pivotably attached to each other by means of pins 10, each felt tip pen is arranged offset relative to the direction of movement, and the central marking element 5 is It is fixed to the plate 20 with bolts 21, and cannot pivot itself.
However, the other marking elements 5 are pivotally connected by pins 10 as shown in FIG. installed to do so. The pivoting of these pivotable marking elements 5 is effected by a drive motor 30 . That is, an internal threaded member 32 is connected to the rotating shaft of the drive motor 30 via a universal joint 31, and the lower end of the threaded member 33 screwed into the internal threaded member 32 is connected to the marking element 5 and the pin 40. The drive motor 30 rotates the internal threaded member 32 to drive the threaded member 33 in the vertical direction, thereby pivoting or rotating the marking element 5 about the pin 10. It's becoming like that.

In order to detect the pivot position of the marking element, a potentiometer 50 is provided, and the protrusion amount of the screw member 33 is determined by the amount of the wire 51, one end of which is connected to the tip of the screw member 33. i.e. marking element 5
It is designed to detect the slope of the As such a position detection device, a position detector using optical means other than a potentiometer can also be used.

According to the marking device configured as described above, when the marking surface of the material to be marked is curved, the direction of the pen shaft is oriented toward the center of curvature according to the curvature, that is, it is oriented perpendicular to the marking surface. By controlling each drive motor 30 to rotate it around the pin 10, the marks are set at equal intervals from the marking surface S as shown in FIG. The drive motor 30 is controlled by a potentiometer 5 which is a position detection device.
This is done exactly by 0. Control from a remote location is therefore possible. Of course, if the marking surface is flat or concave, it can be set similarly. In the case of a convex surface as shown in FIG. 9, the formed dots P are closer together as shown in FIG. 9A, but this does not hinder the clarity of the marking and is often preferable.

As mentioned above, according to the present invention, by making each marking element rotatable, it is possible to mark in an optimal state according to the curvature of the marking surface, and as the pipe diameter becomes smaller, the dot spacing also becomes smaller. Therefore, well-balanced marking according to the pipe diameter can be achieved. Therefore, the effect of making the marking even more clear is significant.

Although the present invention has been described with reference to the illustrated embodiment, similar effects can be obtained in a spray-type marking device by adjusting the pivoting of each marking element, that is, the operating direction, which is a feature of the present invention. There is no limitation on the configuration of the operating mechanism.

[Brief explanation of drawings]

1 and 2 are a side sectional view and a front view, respectively, of a conventional felt-tip marking element. 3 and 4 are a partial front view and a plan view of a conventional marking device having a plurality of these marking elements. FIG. 5 is an explanatory diagram showing the formation of dots. 6 to 8 are a partial front view, a top view, and a side view, respectively, of a marking device according to the present invention. FIG. 9 is a side view showing a state where the marking surface is followed. FIG. 9A is an explanatory diagram showing the formation of dots in the case of FIG. 1...Felt pen, 2...Core, 3...Main body, 4...Solenoid, 5...Marking element, 10...Pin, 20...Mounting plate, 22...
Guide groove, 30... Drive motor, 31... Universal joint, 32... Internal thread member, 33...
...Screw member, 50...Potentiometer, 51...
…wire.

Claims (1)

[Scope of utility model registration request] In a marking device that includes a plurality of marking elements 5 each having a marking portion 1 such as a spray gun or a felt pen, and marks a dot symbol by selecting an individual operation, each of the marking elements 5 is connected to the spray gun, felt pen, etc. The marking parts 1 of the marking parts 1 are arranged so as to be offset from each other with respect to the moving direction of the surface to be marked M, and are arranged adjacent to each other in the lateral direction, and each marking element 5 is arranged orthogonal to the moving direction of the surface to be marked M. A detecting device 50 such as a potentiometer is installed to be rotatable in the direction and detect the rotational position, so that the operating direction of each marking element 5 can be adjusted to the surface M to be marked according to the curvature of the marking surface M. A marking device characterized in that it can be set vertically and at equal intervals from a surface M to be marked.