JPH03184799A - Card punch - Google Patents

Abstract

PURPOSE:To enable it to surely avoid any locking state in a simple mechanism by installing plural sets of positioning means which energizing a punch die to a frame with preloading force, overcoming its punching force, by means of an elastic body and interlocking with each other with this energizing force at time of the die punching start, then getting rid of the engagement in a retracted state against the energizing force. CONSTITUTION:In the case of a normal card, a die 4 is ensured of concentricity between a die hole 4' and a punching pin 2 owing to engagement between a recess 3a and a pin 6, and it is energized by preloading force overcoming against punching force so that it can do normal punching operations. When an irregular card or the like is inserted, excessive punching force works there, so the die 4 is retracted against energizing force of a coil spring 7, and at the initial period of this retraction, it is guided by the engagement between the recess 3a and the pin 6, bur after ward it is freely retracted in a parallel manner, therefore a stain or the like to be produced on a guideway small in clearance will not occur at all. Next, at the time of a reset stroke in a drive unit, when the die 4 goes upward by dint of energizing force of the coil spring 7, it is guided by the taper of each intake part of the recess 3a and the pin 6 whereby it is reset to the regular position, returning to the stand-by position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a punching device for prepaid cards, etc., and particularly to a card punching device equipped with an overload prevention mechanism that is optimal for those that use a motor as a punching power source. .

[Conventional technology]

Conventionally, when using a prepaid card, there has been an unauthorized use of the prepaid card by inserting a different hard sheet over the prepaid card to obstruct puncturing.

On the other hand, those that use a rotary motor (hereinafter referred to as motor) as the drilling power source have lower speeds than those that use a solenoid as the power source, but on the other hand, the power capacity can be reduced, and the entire drilling device can be made thinner. It is expected to develop in the future because it is easy to carry out.

If the above-mentioned unauthorized use is made to the motor-driven card punching device, the punching pin with a punching blade at the tip (hereinafter referred to as the punching pin) will not be able to punch, and the motor will continue to drive. , the motor becomes locked,
There was a risk of the power supply unit malfunctioning and the drilling blade breaking.

In response to this, there are proposals aimed at avoiding or releasing from this locked state.

In other words, in Utility Model Application No. 63-161.697, if the motor does not return to the standby state within the timer setting time after a start command, it is determined that the motor is in the locked state and the motor is reversed to release the motor from the locked state. It is also a 63rd year
In No. 7498, a spring is interposed between a cam which is a driving device and a punching pin, and when a hard card is inserted, the spring is bent to avoid a locked state.

[Problem to be solved by the invention]

However, when the motor is in the locked state, as in the above-mentioned Utility Model Application No. 63-161697, the motor is reversed to release it from the locked state. Since a detection device is used to detect , the device is complicated, maintenance is also complicated, and the product price is also high. Furthermore, the above-mentioned Utility Model Laid-Open No. 63-7498 in which a spring is interposed between the drive device and the punching pin has these disadvantages and also makes it difficult to reduce the thickness of the device.

An object of the present invention is to provide a card punching device that uses a simple mechanism and reliably avoids a locked state.

[Means to solve the problem]

The present invention provides a card punching device comprising a frame, a punching pin guided by the frame and having a punching blade at the tip, and a die attached to the frame and performing a punching action in cooperation with the punching pin, wherein the die has an elastic The die is biased against the frame with a preload force that counters and overcomes the punching force exerted on it by the body, and has a tapered or sloped introduction section between the frame and the die. The card is characterized in that it has a plurality of sets of concave and convex positioning means that are engaged and connected by the biasing force at the start of the process, and are disengaged when the die retreats against the biasing force. It is a punching device.

[Effect]

When using the punching device of the present invention to punch a normal prepaid card where the punching pin is subjected to a load below a predetermined value,
Driving force is transmitted to the drilling pin from a driving member for moving the drilling pin up and down, and drilling is performed.

The punching device of the present invention avoids a locked state by retreating against the biasing force applied by the die or its preload when an excessive load is applied to the die. However, it reliably guarantees the backward movement of the die at this time, and also effectively guarantees the concentricity of the die and the drilling pin at the start of the next drilling after the avoidance operation. That is, a high-precision guide device is not used for the steps of retracting the die and returning it to its home position. If a high-precision guide device is used, the guide device ensures concentricity of the die with respect to the drilling pin and, if necessary, reliably guides the backward movement.
This requires high-precision machining, resulting in higher prices and larger sizes.

The present invention has discovered that concentricity of the die with the drilling pin only needs to be guaranteed at the start of the drilling operation, and concentricity during the retreat and return strokes is not required. A positioning means consisting of a concave part having an introduction part that opens in the shape of a shape, and a convex part having a pointed introduction part fitted into the recess part (however, only one introduction part may be used), and a preload applied to counter the punching force. This is based on the discovery that this can be achieved easily and reliably by combining the biasing forces.

〔Example〕

Next, the present invention will be explained in more detail with reference to the drawings.

The second figure is an enlarged half-sectional view of an example of the main part of the punching device of the present invention in a standby state.
Plural pairs of dots are arranged so that they are symmetrical.

In the figure, reference numeral 1 denotes a punching device main body, and the punching device main body 1 includes a punching pin 2 having a punching blade at the tip, and a punching action on a card inserted into a gap 5 in cooperation with the punching pin 2. It consists of 4 dies that play.

The die 4 holds driving means such as a motor drive cam (not shown) for vertically driving the punching pin 2, and also includes a main frame 3 and a sub-frame 3' extending from the main frame 3 for guiding the vertical movement of the punching pin 2. effectively supported.

That is, each of the plurality of pins 6 provided in the vicinity of the coil spring 7 has a large diameter part in the center for regulating the gap 5, and has small diameter parts concentric with each other before and behind the large diameter part in the center, one of which is connected to the die 4. The other side is press-fitted into the main frame 3 and fixed.
The die 4 is positioned by being fitted into a recess 3a provided in the recess 3a and engaging with the recesses and recesses by minute dimensions. The pin 6 and the recess 3a each have a tapered introduction section at the tip and entrance.

On the other hand, the coil spring 7 applies a sufficient biasing force to the die 4 to counter and overcome the normal downward punching force acting on the die 4, and this biasing force ensures the interlocking connection at the dimension t. ing.

Next, the operation of this embodiment will be explained. In the case of a normal card in this embodiment, the die 4 ensures concentricity between the die hole 4' and the punching pin 2 due to the engagement between the recess 3a and the pin 61, and also resists the punching force acting on it. It is biased by the overcoming preload force.

From this point on, normal punching operation can be performed. If an incorrect card or the like is inserted, an excessive punching force is applied and the die 4 retreats against the biasing force of the coil spring.
At the very beginning of retraction (stroke of the same dimension), the recess 3a
The guide is guided by the engagement of the pin 6, but after that, the spring 7 is arranged symmetrically with respect to the point, so the spring 7 retreats almost parallel to the guide surface, and therefore, the creaks that tend to occur with guide surfaces with small clearance do not occur. . In addition,
Since the dimension t is small, no squeak occurs even if the die 4 does not retreat in parallel. During the return stroke (upward movement) of the drive device, the die 4 rises due to the biasing force of the coil spring 7, but at this time, it is guided by the concave portion 3a and the tapered portion where the pin 6 is introduced, and returns to the normal position and waits. Return to position.

In this embodiment, the dimensions of the recess 3a and the pin 6 are engaged with each other at the parallel part of the section. Therefore, due to errors in the depth of the recess 3a and the length of the protrusion of the pin 6, the difference in the dimensions at the start of punching of the die 4 There is a feature that the vertical position and its inclination are not affected.

In addition, as a modification of this example, the coil spring 7 can be made into a single piece having a large diameter so as to surround the die hole 4'. This can also be said for the example shown in Figure 2 below.

These two examples are examples in which the die 4 becomes completely free when its positioning means is separated and loses its function, but if necessary, a simple guide device that prevents the occurrence of squeaks can be used by increasing the clearance. May be used together.

Next, in Figure 2, a ball holder 9 is used instead of the pin 6 in Figure 1.
This shows an example in which positioning is performed using a ball 8 fixed at a position and a conical recess 3a. In some examples, a commercially available ball is used instead of the pin 6 to reduce costs, and there is no parallel surface meshing length t.

FIG. 3 shows an example in which the retreat of the die 4 when the punching force is excessive is a swinging motion.

That is, the die 4 is spaced apart in the direction perpendicular to the plane of the paper, and the two pillows are connected to the T-shaped pillow 10a attached to the main frame 3 so that the cylindrical parts 10' of the heads are in a straight line with each other. A second pillow 10b having a similar shape and oriented such that its cylindrical axis is perpendicular to the base of the triangle is provided at the apex of the isosceles triangle.
11, and is positioned by being biased with a preload force by a coil spring 7 provided centered within the triangle. The die hole 4' for the punching pin 2 is also located within the triangle, and is located closer to the apex of the triangle than the coil spring 7.

With the above configuration, when an excessive punching force is applied to the die 4, the die 4 performs an oscillating motion about the base of the triangle, that is, the pillow head 10' as the central axis, and after this retreat and subsequent return stroke After being guided by the introduction part and positioned in a direction perpendicular to the plane of the paper, it is positioned at the normal position. In this example, the elastic body, which is a coil spring 7 that can provide a biasing force, is attached to the die hole 4'.
It has the advantage that there is no need to make it point symmetrical.

In the above example, the relationship between the pin 6, ball 8, and pillows 10a and 10b between the main frame 3 and the die 4 can be reversed, and the coil spring 7 can also be replaced with another type of spring. It is. Furthermore, although one side of the mesh is defined as a recess, the recess may be a through hole.

〔Effect of the invention〕

'' As is clear from the double series, the punching device according to the present invention has a simple structure, and when an excessive punching force is applied due to unauthorized use, the die resists the biasing force and creaks etc. Avoid the lock by retreating freely, without causing
After this retreat, the tool reliably returns to its original position and regains concentricity with the punching pin in preparation for the next punching.

The punching device of the present invention is particularly suitable for motor-driven punches that are prone to locking, but it is also effective when applied to solenoid-driven punches.

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are views showing respective embodiments of the punching device according to the present invention.

Claims (1)

Claims: 1. A card punching device comprising a frame, a punching pin guided by the frame and having a punching blade at the tip, and a die attached to the frame and performing a punching action in cooperation with the punching pin, The die is biased against the frame by an elastic body with a preload force that counteracts and overcomes the punching force acting on it, and has a tapered or sloped introduction section between it and the frame, and the die is It is characterized by having a plurality of sets of concave and convex positioning means that are engaged and connected by the urging force at the start of the punching, and are released from the engagement when the die is retracted against the urging force. card punching device. 2. The card punching device according to claim 1, wherein the punching power is provided by a rotary motor.