JP3002436U - Printed surface grinding machine for magnetic cards - Google Patents

Abstract

(57) [Summary] [Structure] When the telephone card C is conveyed in the G direction by the rubber roller 1 and the printing on the back surface CB is ground and removed by the rotary grindstones 2A, 2B and 2C, the rotation axis of the angular rotary grindstone is set to the back surface C.
The magnetic signals D recorded in B are set so as not to intersect at right angles to the arrangement direction, and in particular, in the case of the rotary grindstone 2A, the arrangement is made parallel to the arrangement direction of the magnetic signals D. [Effect] Back side CB due to runout of the whetstone and play of the machine
Even if a striped concavo-convex pattern is formed, the concave portions do not overlap over the entire area of the magnetic signal D, and a magnetic signal reading error does not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for erasing printing on the front or back of a magnetic card such as a prepaid card and reprinting an unused magnetic card in the case of a printing error or design change. In particular, the present invention relates to one suitable for grinding and removing the printing applied to the surface on the side where a magnetic signal is recorded.

[0002]

[Prior art]

 Magnetic cards, such as prepaid cards, in which magnetic signals are recorded on the back surface of paper or resin cards are widely used. In order to increase the commercial value of such magnetic cards or to display necessary information, design printing or character printing is often performed on the surface of magnetic cards, but when printing mistakes or changes in print content occur. In this case, it is necessary to remove the printing that has been performed once and then print again. Although the ink used for such printing may be dissolved and removed by an organic solvent such as toluene, it is difficult to put it into practical use because it may pose a danger to the health of workers and there is a problem in safety. Is. Therefore, as a device for mechanically scraping prints, a rectangular magnetic card such as a telephone card is configured to be conveyed along the long side direction of the rectangle, and a cylindrical rotation is made in the middle of the conveying path of the magnetic card. There is known a device in which a grindstone is arranged so that its rotation axis is perpendicular to the conveying direction of the magnetic card, and the cylindrical surface of the grindstone is brought into contact with the surface of the magnetic card to grind and remove the print. . On the other hand, in the case of a magnetic card with a magnetic signal recorded on the back like a telephone card, design printing and character printing were performed only on the surface where no magnetic signal was recorded. A double-sided design printing type card with design printing and character printing on the back side that has been recorded is being put to practical use. The need to remove is increasing.

[0003]

[Problems to be solved by the device]

 In the above conventional device, the pressing force of the rotary grindstone against the printing surface fluctuates periodically due to the runout of the cylindrical surface of the rotary grindstone and the looseness of the bearings and other devices, and many prints are ground and removed on the card surface after grinding. The valley-shaped portions and the mountain-shaped portions that are not so much ground and removed are alternately formed in stripes. If the surface where no magnetic signal is recorded is removed by grinding, such a striped pattern will not hinder reprinting.However, the magnetic signal recorded on the back surface will be recorded along the long side of the magnetic card. Since they are recorded side by side, the striped pattern appears to intersect at right angles to the direction in which magnetic signals are arranged when the back surface is ground using the above conventional device. Then, when the magnetic card is actually used, the distance between the magnetic head for reading the magnetic signal and the magnetic signal changes in a cyclic manner due to the striped pattern, and a signal reading error occurs in the mountain-shaped portion. Since the magnetic card in which the signal reading error has occurred cannot be used as the original magnetic card, there is a problem that the economic value becomes zero even if the magnetic card is not used. In view of the above problems, the present invention provides a magnetic card printing surface polishing apparatus capable of grinding and removing not only the printing on the front surface but also the printing on the back surface on which a magnetic signal is recorded. The purpose is to do.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the invention of claim 1 is provided with a conveying means for conveying a magnetic card in which magnetic signals are arranged and recorded in a certain direction in a predetermined direction, and a cylindrical shape is provided in the middle of a conveying path of the magnetic card. In a device that horizontally installs a rotating grindstone and grinds and removes the printing on the front and back of the magnetic card, make sure that the direction of the rotation axis of the rotating grindstone and the direction in which the magnetic signals are arranged are not at right angles. It is characterized by having done. A second aspect of the present invention is characterized in that, in the first aspect of the invention, the direction of the rotation axis of the rotary grindstone and the direction in which magnetic signals are arranged are parallel to each other. According to a third aspect of the present invention, in addition to the first aspect of the present invention, a plurality of rotary grindstones are provided along the magnetic card transport direction, and at least one rotary grindstone has a rotation axis direction and a magnetic signal arrangement direction. It is characterized in that the angle formed by and the angle formed by the direction of the rotation axis of the other rotary grindstone and the direction in which the magnetic signals are arranged are set to be different.

[0005]

[Action]

 According to the first aspect of the present invention, the striped pattern generated by grinding is inclined with respect to the direction in which magnetic signals are arranged without intersecting at right angles. Since the magnetic signals are recorded side by side in a band with a specified width, even if a striped pattern occurs, the valleys of the striped pattern overlap in any of the width direction of the magnetic signal, and the specific magnetic signal peaks. It is not completely covered by the part. Therefore, even if the peak portion of the striped pattern overlaps the portion where the magnetic signal is recorded, the valley portion also overlaps the signal at the same time, so that an error that the specific magnetic signal cannot be read does not occur. Particularly, when the arrangement direction of the magnetic signals and the striped pattern direction are parallel to each other as in the invention of claim 2, the printing surface is ground in the entire longitudinal direction of the area where the magnetic signals are recorded. Since it remains constant, the probability that a magnetic signal reading error will occur is further reduced. If a plurality of rotary grindstones are used and grinding is carried out so that the striped patterns intersect with each other as in the invention of claim 3, the unprinted portion of the print, that is, the mountain portion does not form a continuous ridge shape. As a result, it is possible to reduce the area in which the magnetic signal is covered by the mountain portion, which reduces the probability of a magnetic signal reading error.

[0006]

【Example】

 Referring to FIG. 1, M is a grinding device according to the present invention, and the telephone card set in M1 is ground while being conveyed in a processing area M2 and is discharged from a conveyor M3. Incidentally, M4 is a control device for controlling the operation of the grinding device 4. The structure of the processing area M2 is as shown in FIGS. 2 and 3, where C is a telephone card, which is a kind of magnetic card, and the magnetic signal D is on the back surface CB of the telephone card C and the long side of the telephone card C. They are recorded side by side in the same direction and are used by inserting them into a public telephone in the I direction. In the case of this embodiment, the telephone card C is conveyed in the G direction, which is different from the I direction by 90 °, and is conveyed in the G direction by being sandwiched by a plurality of conveying rubber rollers 1 rotating at a constant speed. To be done. Cylindrical rotary whetstones 2A, 2B and 2C are horizontally installed in the middle of the transportation path of the telephone card C, and when the telephone card C reaches the horizontal position of each rotary whetstone 2A, 2B and 2C, the rotary whetstone is rotated. The printing on the back surface CB is ground and removed by 2A, 2B, and 2C. By the way, the rotary grindstone 2A is horizontally arranged so that its rotation axis is parallel to the direction in which the magnetic signals D are arranged, that is, parallel to the long side of the magnetic card C. Further, the rotary grindstone 2B is horizontally installed at a predetermined angle with respect to the G direction which is the transport direction, and the rotary grindstone 2C is horizontally installed while being tilted in the opposite direction to the rotary grindstone 2B.

According to the above configuration, after being ground by the rotary grindstone 2A, the back surface CB of the telephone card C is ground even if it has a striped pattern of unevenness, and even if any portion of the magnetic signal D is striped. Since the valley portions are overlapped with each other, a magnetic signal reading error does not occur when the telephone card C ground in this way is used. As described above, only the rotating grindstone 2A may be used, but by further grinding with the rotating grindstones 2B and 2C, the striped patterns in the three directions intersect with each other, and the state of the back surface CB after grinding can be made more uniform. As a result, it is possible to further prevent a magnetic signal reading error.

Further, in the present embodiment, the printing performed on the front surface CF of the telephone card C is also configured to be ground and removed at the same time. The telephone card C is parallel to the rotary grindstones 2A, 2B and 2C. Rotating grindstones 4A, 4B, and 4C for grinding the front surface CF are laterally provided at symmetrical positions with respect to each other, and the back surface CB and the front surface CF can be simultaneously ground in one operation. Since the rotational axes of the rotary whetstones 2B and 2C are inclined with respect to the G direction, the transport direction of the telephone card C tends to be inclined at right angles to the rotational axes of the rotary whetstones 2B and 2C. Reference numeral 3 is a guard that corrects the inclination of the telephone card C in the G direction.

In order to grind the back surface CB and the surface CF at the same time, the rotary grindstones 2A, 2B, 2C for grinding the back surface CB and the grindstones 4A, 4B, 4C for grinding the front surface CF are provided at the same position. Although it is not necessary, only the positional relationship between the rotary grindstone 2A and the rotary grindstone 4A is shown in FIG. 4, but the rotary grindstones 2A, 2B, 2C and the rotary grindstones 4A, 4B, 4C are arranged at different positions. Good. Reference numeral 11 in the drawing denotes a rubber guide roller which is arranged to face the rotary grindstone 2A and the rotary grindstone 4A. In each of the above-mentioned embodiments, an example of an apparatus for simultaneously polishing the back surface CB and the front surface CF of the telephone card C is shown. However, when only one side of the telephone card C is ground, or one side is reciprocated. When both sides are ground by grinding, for example, a plurality of sets of rotary grindstones and guide rollers may be arranged side by side in the positional relationship between the rotary grindstone 2A and the guide roller 11 in FIG. Further, in the above-mentioned embodiment, the case where the grinding liquid is not used has been described in order to facilitate understanding of the contents, but it is preferable to use the grinding liquid for cleaning and cooling the card. Incidentally, as the grinding liquid, water or an aqueous solution of a surfactant is suitable in order to simplify the post-process.

By the way, in the above embodiment, the case where the printing of the telephone card is removed by grinding has been described, but the present invention can also be applied to other magnetic cards such as the JR orange card.

[0011]

[Effect of device]

 As is apparent from the above description, according to the present invention, not only can the design printing applied to the surface of the magnetic card on which the magnetic signal is not recorded be removed, but also on the surface where the magnetic signal is recorded. The applied design print can be ground away without causing subsequent magnetic signal reading errors.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a grinding device to which the present invention is applied.

FIG. 2 is a plan view showing an arrangement state of grinding wheels.

3 is a view taken along the line III-III in FIG.

FIG. 4 is a front view showing another arrangement of the rotary grindstones for double-sided grinding.

[Explanation of symbols]

 1 Rubber Roller 2A Rotating Whetstone 2B Rotating Whetstone 2C Rotating Whetstone 3 Guard 4A Rotating Whetstone 4B Rotating Whetstone 4C Rotating Whetstone 11 Guide Roll

Claims (3)

[Scope of utility model registration request] 1. A surface of a magnetic card is provided with a conveying means for conveying a magnetic card in which magnetic signals are arranged and recorded in a certain direction in a predetermined direction, and a cylindrical rotating grindstone is provided in the middle of a conveying path of the magnetic card. In a device for grinding and removing the print applied to the back surface or the back surface, the printing surface of the magnetic card is characterized in that the angle formed by the direction of the rotation axis of the rotary grindstone and the direction in which the magnetic signals are arranged is not perpendicular. Grinding equipment. 2. An apparatus for grinding a printed surface of a magnetic card according to claim 1, wherein the direction of the axis of rotation of said rotary grindstone and the direction of arrangement of magnetic signals are parallel to each other. 3. A plurality of rotary grindstones are provided along the carrying direction of the magnetic card, and an angle formed by the direction of the rotation axis of at least one rotary grindstone and the direction in which the magnetic signals are arranged,
2. The apparatus for grinding a printed surface of a magnetic card according to claim 1, wherein an angle formed by a direction of a rotation axis of another rotary grindstone and an arrangement direction of magnetic signals is different.