JPH04217500A - Multiple letter holder for drilling machine - Google Patents

Abstract

PURPOSE: To use a stepper motor by making two small-size rotary turrets maintained on a central support core interact with an element to be punched fed between upper and lower punch elements. CONSTITUTION: This multiple character-holding apparatus for punching machines 11 provides an element to be punched 13 such as a plastic card or the like on a punching position 12 of a pair of punch drive mechanism 14 equipped with a hammer 15 to be worked on a punch 16. A lower turret 19 and an upper turret 20 interacting with the element to be punched 13 are rotatably maintained on a central support core 18. The support core 18 is driven rotatively via transmission by a first motor means. And each rotary turret 19, 20 is provided with second motor means 29, 30. In this case, the sizes of the rotary turrets 19, 20 can be reduced, therefore a stepper motor can be used as a motor means.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple character holding device for a punching machine.

[Conventional technology]

Punches, especially punches for punching cards made of any desired material, are known. This punching machine is equipped with a drum-type character holding device. A punch for holding characters and a corresponding reverse punch are attached to the outer periphery of the drum of this character holding device. These conventional devices typically consist of a single drum of somewhat larger size, but these drums must support approximately 60 to 110 characters, and these drums must support two consecutive These conventional devices are not capable of high drilling speeds because they work with forward/reverse motions, rotating through a circumferential angle of up to about 180° during the drilling operation.

Although less commonly used, devices are also known in which the letters or punches are mounted on a flat rack section. For this device, the number of characters is small. Also, the movement of the rack does not result in being particularly fast, especially when the character to be punched is on the opposite side of this rack. Moreover, in this type of equipment, since the operational movement of the rack is carried out along a line, twice as much space is required compared to the size of the rack, and therefore the overall dimensions of the equipment are necessarily considerably larger. .

0004

[Problems to be Solved by the Invention] Both of the two conventionally known types of character holding devices described above tend to have large overall dimensions and weight due to constraints arising from the same structure, and There is a problem in that an increase in the number of punches present in the process leads to a decrease in productivity.

Furthermore, as the number of characters increases, access time increases for the same speed of scanning operation, resulting in poor performance of the device. On the other hand, if the access time is to be kept constant, the speed of the scanning operation must be increased accordingly, but this increases the size and weight of the character holding and supporting portion. It is difficult to achieve this goal. Also, if more powerful and complex motors and control means are used to achieve these objectives, the size and weight of the device will necessarily increase.

Although high productivity can be achieved using direct current (d.c.) motors and associated operating methods, this type of equipment is limited by the stepper (s.
Unfortunately, this results in a considerably higher cost than the tepper) type.

However, in the case of this stepper motor,
In addition to problems arising from its low speed, there is also the problem of vibrations around its equilibrium position when used at speeds near its operating limits.

Other known devices include the so-called "daisy" type. Although this type allows relatively fast rotation and positioning of the character holding unit, there are problems arising from the elasticity of the character support flaps.

It is an object of the present invention to solve the above-mentioned problems in the prior art and to achieve performance not possible even using stepper motors at relatively low cost and with limited overall size and weight. It's about getting.

0010

SUMMARY OF THE INVENTION The above objects of the present invention are achieved by providing a multiple character holding device for a rotary drum punching machine. That is, in the double character holding device for a punching machine of the present invention, a plurality of upper and lower punch elements are held on the outer peripheral portion of a drum element, each of the punch elements holds a character and a reverse character, and the The upper and lower punching elements are arranged overhead and facing each other and interact with the element to be punched fed between them, the at least two small-sized rotating drums It is characterized by having a central support core that holds the. the central support core is driven to rotate by an associated transmission mechanism and first motor means coupled thereto;
Furthermore, each of said rotating drums is provided with second motor means.

[0011]

The structural and functional features and advantages of the character retention device according to the present invention will be better understood from the following non-limiting disclosure.

0012

[Embodiments] Examples will be explained below with reference to the accompanying drawings.

A double character holding device for a punching machine, indicated in its entirety by the numeral 11 in FIGS. 1 and 2, is provided with a punching station 12. As shown in FIG. Inside this punching station 12, within an area defined by a pair of punch drive mechanisms 14 with hammers 15 acting on a punch 16, an element 13 to be punched, such as a plastic-coated card, is supplied. Mechanical alignment elements, described below, for properly aligning the punch support drum are provided at the punch station 12. Detailed illustrations of the punch drive mechanism 14 and the drive mechanism combined therewith have been omitted, but these are well known per se, and it goes without saying that they can be implemented in any appropriate manner.

The compound character holding device 11 for a punching machine consists of a base 10 on which a support core is mounted. This support core is indicated by the number 18 and is coaxially supported by a vertical shaft 17 via a bearing 9, so that it is rotatable. This support core 18 supports four similarly rotatable drum parts. Each of these drums is composed of a lower drum 19 and an upper drum 20.

The rotating support core 18 described above comprises an essentially cylindrical element with a saw-toothed base portion 21. This base part 21 engages a gear wheel 22 with complementary teeth. This gear 22 serves to reduce the rotational speed supplied by the associated motor means, i.e. from another gear 23 provided at the bottom end of the first motor means 24 mounted on the top of the base 10. It functions to weaken and convey the movement of the body. For example, a stepper motor is used as the first motor means.

The support core 18 is provided with a lower contour flange 25 and an upper contour flange 26. Both flanges 25, 26 extend circumferentially outward;
They are also in close contact with the lower flat base 27 and upper flat base 28 of the housing, respectively. The lower planar base 27 and the upper planar base 28 support the lower drum 19 and the upper drum 20, respectively. In the specific form of the embodiment described here, the upper contour flange 26 is connected to the rest of the support core 18 by four vertical ribs 7 . Furthermore, the vertical shaft 17 is provided with a flange element 8 formed integrally thereon and for supporting sensor means described below.

Furthermore, the lower drum 19 and the upper drum 2
0 are connected to second motor means 29 and 30, respectively. These second motor means 29, 30 are fixedly provided to the lower plane base 27 and the upper plane base 28. These are, for example, of the stepper motor type and have extremely small overall dimensions. As illustrated in the drawings, a lower contour flange 25 and an upper contour flange 2
6 is provided with a recess 31, and in relation to this recess 31, the lower plane base 27 and the upper plane base 28 are arranged in the correct position and fixed with screws or the like (not shown).

The lower drum 19 and the upper drum 20 each have very small overall dimensions, as described above, and each have from about 20 to about 40 punches 16. These punches 16 are located inside their respective seats 32. The lower drum 19 and the upper drum 20 are each provided with a plurality of flat facets 33 along their circumferential surfaces. A small tooth is provided on this facet 33, which serves as a reference element, and which also serves as a reference element for the rotating support core 18.
It cooperates with sensor means 34, 35 located above and fixed to the vertical shaft 17 passing centrally inside the . A concave housing 41 is defined by said teeth. Further, a mechanical positioning means 42 provided on the punch drive mechanism 14 is inserted into the inside of the concave housing 41 . This mechanical alignment means 42 serves to precisely and positively position the lower drum 19 and the upper drum 20 during the drilling operation. As a result, problems caused by vibrations of the stepper motor around the equilibrium position can be overcome.

Electrical connections between the power supply and the processor that associate a few elements (not shown) include at least four
This is done by a set of two multiplex flat cables 36. The multiplex flat cable 36 emanates from the vertical shaft 17 and is tightly connected to a first removable connector element 37 and fastened to the top surface of the upper contour flange 26 by a second connector element 38 . Ru.

As shown in FIG. 1, the second connector element 3
Leading wires 39, 40 respectively led out from 8 are used to connect to the second motor means 29, 30. Also in FIG. 1, the four multiplexed flat cables 36 are at least partially overlapping each other and the vertical axis 1
It is wound along an angle of about 360° around 7,
As a result, the support core 18 can rotate through 360 degrees or a slightly smaller angle. This then results in a lower drum 19 in front of the punching location 12 where the punching operation of the element 13 to be punched takes place.
and any pair of upper drums 20 can be moved.

From the above explanation, the operation mode of the character holding device according to the present invention can be easily understood.

[0022] However, it is important to mention the non-negligible advantages that can be achieved with the above device. First of all, since the character-holding punches and the counter-punch are provided on a predetermined number of drums with a short circumference, their movement and intervention is extremely fast and precise.

Furthermore, the small dimensions of the drums 19, 20 allow rapid selection of the characters to be used, in part due to the small and inexpensive stepper motors.

Secondly, the drive element for the motor means of the central rotating support core is a transmission mechanism equipped with speed reduction means (the form illustrated in the embodiment is a gear, but other forms such as a gear) are provided. The inertia is significantly reduced by the drums 19, 20 required for the subsequent drilling operation.
The speed can be set to a speed suitable for positioning.

Advantageously, the support core 18 is comprised of a precision-fabricated support core rotating about a vertical axis 17, as shown in the embodiment, and is comprised of a plurality of lower planar bases 27 and Upper planar base 28 supports lower drum 19 and upper drum 20 with associated motor means 29, 30, respectively. Therefore, if one of these small assemblies exhibits a malfunction, or simply has to be replaced for repair, it can be removed by simply unscrewing its fastening screws, and therefore in a very short time. can be replaced with an equivalent assembly. This is also due to the characteristic shape of the flat base, as well as the presence and use of the connector elements 37, 38.

[0026] Advantageously, the above-mentioned modular construction of the support core also makes it possible to use this support core only partially.

In the form of the embodiment shown in the accompanying drawings, depending on the particular application of the machine required, it is consequently possible to: That is, by installing and operating only two pairs of rotating drums 19 and 20 and their respective motor means, while leaving the housing or recess 31 of the remaining ones empty, the device is made lightweight and Selection and positioning movements can be made quickly, making it possible to achieve highly accurate drilling operations.

Furthermore, the provision of sensor means 34, 35 and the provision of flat facets on each of the drums 19 and 20 make the device accurate and precise even at high speeds of the drums 19 and 20 at the punch station 12. can be operated.

[0029]

As described above, the multiple character holding device for a punching machine of the present invention solves the problems of the prior art as described above, and can be achieved at a relatively low cost and with a limited overall size and weight. Therefore, it is possible to obtain high performance that was impossible even if a stepper motor was used in the conventional structure.

[Brief explanation of the drawing]

1 is a plan view disclosing the form of a practical embodiment of a double character holding device; FIG.

FIG. 2 is a vertical cross-sectional view taken along line II-II in FIG. 1;

[Explanation of symbols]

7 Vertical ribs 8 Flange element 9 Bearing 10 Foundation 11 Multiple character holding device for punching machine 12 Punch location 13 Elements to be punched 14 Punch drive mechanism 15 Hammer 16 Punch 17 Vertical axis 18 Support core 19 Lower drum 20 Upper drum 21 Base part 22, 23 Gear 24 First motor means 25 Lower contour flange 26 Upper contour flange 27 Lower plane base 28 Upper flat base 29, 30 Second motor means 31 Recess 32 za 33 Small side 34, 35 Sensor means 36 Multiplex flat cable 37, 38 Connector element 39,40 Conductor 41 Concave housing 42 Mechanical alignment means

Claims (13)

[Claims] 1. A drum element comprising a plurality of upper and lower punch elements on a peripheral surface portion thereof, said upper and lower punch elements each comprising a letter and an inverted letter, said upper and lower punch elements are arranged overhead and facing each other and interact with the element to be punched held between them, comprising at least two a central support core with two small sized rotating drums, said support core being driven to rotate by an associated transmission mechanism and first coupled motor means, said support core having two small sized rotating drums, said supporting core being driven to rotate by an associated transmission mechanism and first coupled motor means, said supporting core having two small sized rotating drums; A double character holding device for a punching machine, characterized in that each of the two is provided with a second motor means. 2. The multiple character holding device for a punching machine according to claim 1, wherein the support core is rotatable on a vertical axis coaxial with the support core and is integrally disposed with the base. 3. Sensor means are provided above the stationary vertical shaft, said sensor means cooperating with reference elements provided along the upper circumferential edges of said at least two rotating drums. 3. A multiple character holding device for a punching machine according to claim 2. 4. The rotary drum of claim 1, wherein each of the at least two rotating drums comprises a lower drum and an upper drum supporting the lower and upper punching elements in associated seats inside thereof. Multiple character holding device for punching machines. 5. Each of the lower drums and each of the upper drums are respectively disposed on lower and upper planar bases, each of the lower and upper planar bases holding one of the second motor means. 5. The multiple character holding device for a punching machine as claimed in claim 4, wherein the lower and upper planar bases are tightly fastened to the support core so as to be freely removable. 6. The support core has connector means fastened thereto, the connector means cooperating with other connector means extending from a conductor derived from the vertical axis and connected to a power source. further, one end thereof is connected to another conductive wire by the connector element fastened onto the support core, and the other end thereof is connected to the second motor means. 6. A multiple character holding device for a punching machine according to claim 5. 7. The conductor wires leading from the vertical axis are multiple flat cables with at least some of them overlapping each other and are wound around the vertical axis at an angle of about 360°. 7. The multiple character holding device for a punching machine according to claim 6. 8. The conductive wire leading from the vertical axis associates sensor means for detecting the position of the at least two rotating drums with movement of the first motor means and the second motor means. 7. A multiple character holding device for a punching machine as claimed in claim 6, wherein the device is operatively coupled to a processor for a punching machine. 9. The associated transmission mechanism coupled to the first motor means is comprised of a plurality of gears serving as speed reduction means for reducing the rotational speed of the first motor means. A multiple character holding device for a punching machine according to claim 1. 10. The multiple character holding device for a punching machine according to claim 1, wherein said first motor means and said second motor means are both of the stepper motor type. 11. The multiple character holding device for a punching machine according to claim 1, wherein each of the at least two rotating drums is equipped with 20 to 40 punches and/or reverse punches. 12. The support core is provided with a lower contour flange and an upper contour flange projecting radially outward and suitable for supporting the at least two rotating drums, the lower contour flange 5. The multiple character holding device for a punching machine as claimed in claim 4, wherein the upper contour flange and the upper contour flange are connected to each other by a vertical rib. 13. A dual character holding device for a punching machine substantially as disclosed in the specification and illustrated in the accompanying drawings.