US3915373A - Punching machine - Google Patents

Abstract

A punching machine having a main shaft adapted to be rotated at a constant speed by an electric motor, a first and a second eccentric rollers mounted on said main shaft and having their centers disposed on different radial line of said main shaft, a punching means including a punch veil arm adapted to make a reciprocating motion in accordance with the rotation of said first eccentric roller and a means for transmitting the reciprocatory motion of said punch veil arm to a punch pin provided movably in up and down direction, and a tape feeding means including a feed arm adapted to be moved reciprocatively through a drive link means in accordance with the rotation of said second eccentric roller and a toothed wheel adapted to rotate intermittently in accordance with the reciprocatory motion of said feed arm, wherein said first and said second eccentric rollers, said punch veil arm and said feed arm are so arranged that the upward and downward movement of said punch pin and the intermittent rotation of said toothed wheel may occur alternatively.

Description

United States Patent [1 1 Sogabe Oct. 28, 1975 1 PUNCHING MACHINE [75] Inventor: Satoshi Sogabe, Nishinomiya, Japan [73] Assignee: Furuno Electric Co., Ltd., Nagasaki,

Japan [22] Filed: June 28, 1974 [21] Appl. No.: 484,007

Primary Examiner-J. M. Meister Attorney, Agent, or Firm-Sughrue, Rothwell, Mion,

Zinn & Macpeak [5 7 ABSTRACT A punching machine having a main shaft adapted to be rotated at a constant speed by an electric motor, a first and a second eccentric rollers mounted on said main shaft and having their centers disposed on different radial line of said main shaft, a punching means including a punch veil arm adapted to make a reciprocating motion in accordance with the rotation of said first eccentric roller and a means for transmitting the reciprocatory motion of said punch veil arm to a punch pin provided movably in up and down direction, and a tape feeding means including a feed arm adapted to be movedreciprocatively through a drive link means in accordance with the rotation of said second eccentric roller and a toothed wheel adapted to rotate intermittently in accordance with the reciprocatory motion of said feed arm, wherein said first and said second eccentric rollers, said punch veil am and said feed arm are so" arranged that the upward and downward movement of said punch pin and the intermittent rotation of said toothed wheel may occur alternatively.

4 Claims, 4 Drawing Figures Sheet 2 of 2 INPUT SlGNAL HG. 2B

SIGNAL PUNCHING MACHINE BACKGROUND OF THE INVENTION 1. Field of the Invention 1 The present invention relates to a punching machine, and more particularly to a punching machine employed in an input equipment of a computor for effecting punching at high speed to have the computor memorize some informations.

2. Description of the Prior Art In the punching machines, it is required that the punching operation and the tape feeding or tape advancing operation must be effected alternatively.

In order to obtain this alternative operations, in the conventional punching machines, the punching and the feeding are effected under control of respective electromagnets in such a manner that the electromagnetic forces of the magnets are used directly to drive the punching means and the feeding means respectively. Some inconveniences are caused by such arrangements, for example, that the operation speed of the machine is unfavourably lowered due to an unavoidable time lag involved in the motion of each electromagnet. It is also inconvenient that there is a fear that the electrical control of the magnet to obtain the alternative operation may fail resulting in vital failure of the memorization. In addition, since the driving of the punching means and the feed means entirely owes to the electromagnetic force of the magnet, large-sized magnets of enough power are required which would necessarily lead to a large dimension of the whole assembly.

SUMMARY OF THE INVENTION It is, therefore, an object of the invention to overcome above described problems.

It is another object of the invention to provide an improved punching machine in which an electric motor is employed in place of the electromagnets to drive the punching means and the feeding means, whereby the punching and the feeding can be effected at higher speed without fail. More strictly, the present punching machine makes use of the torque of an electric motor, which is much greater than the electromagnetic force of the magnets, to effect the punching and the feeding so that the operation speed of the machine may be elevated, and in addition, the alternative operation of the punching means and the feeding means is ensured by a mechanical means including eccentrics and the links for transmitting and converting the torque of the motor for the punching and the feeding.

It is still another object of the invention to provide a small-sized punching means by adopting an electric motor in place of the electromagnet as used in the conventional punching machines.

Additional objects other than those specifically stated will become apparent on condition of the accompanying drawings and when considered with specification and claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevation of an apparatus embodying the present invention.

FIG. 2A and FIG. 2B are fragmentary enlarged views showing a portion for effecting a punching and a portion for effecting tape feeding of the apparatus shown in FIG. 1, respectively, in their operating conditions.

FIG. 3 is a wave form chart for explaining the operation of the apparatus shown in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1, 2A and 23, a main shaft 1 is adapted to be nomally rotated in the direction of an arrow 2 by an electric motor (not shown). The shaft 1 carries a first eccentric roller 3 and a second eccentric roller 4. The eccentric rollers 3 and 4 are so positioned that there is a differential eccentric direction angle of 180 therebetween. The first eccentric roller 3 slidably fits in a punch drive link 5 and can rotate within the link 5 in a sliding engagement with the latter. The punch drive link 5 is connected through a pin 8 to a punch veil arm 7 of which one end is rotatably supported by a fixed pin 6 and the other end is provided with a punch veil, so that the punch veil arm 7 makes a reciprocatory pivotal motion about the pin 6, as shown by an arrow 9, as the first eccentric roller 3 rotates;

The second eccentric roller 4 fits in a feed drive link 10 and can rotate within the link 10 keeping a sliding contact therewith. The feed drive link 10 is connected through a pin 12 to a L-shaped feed arm 11 which is pivotally supported by the fixed pin 6, so that the feed arm 11 makes a receprocatory pivotal motion about the pin 6, as shown by an arrow 13, as the second eccentric roller 4 rotates.

1 The pin 12 for the feed arm 11 and the pin 8 for the punch veil arm 7 are deviated from each other by an angle of some about the axis of the main shaft 1.

A beak-like feed pole 15 is pivotally attached to the feed arm 11 through a shaft 14, and adapted to go up and down in accordance with the reciprocatory pivotal motion of the feed arm 11, so as to engage a toothed wheel 16 to drive the latter in the direction of an arrow 35 intermittently, whereby a tape 17 is advanced intermittently.

The fixed pin 6 carries also a punch arm 18 rotatably which carries at its one end a punch pin 19. The pin 19 goes up and down as the punch arm 18 swings as shown by an arrow 20. The punch arm 18 carries at its one end remote from the punch pin 19, a L-shaped hook pole 22 rotatably through a shaft 21. The hook pole 22 is always biased by a spring 23 in the direction of an arrow 24 and is engaged with a blocking pole 25 so as to go against tensil force of the spring 23 as shown in FIG. 1. The blocking pole 25 is rotatably supported by a shaft 26, and is adapted to pivot as shown by an arrow 29 when an electromagnet 28 attracts a blocking armature 27.

As the blocking pole 25 swings in the direction of the arrow 29, the hook pole 22 is released from the blocking pole 25 and is rotated in the direction of an arrow 30 about a shaft 21 on the punch arm 18, whereby the end of the hook pole 22 remote from the spring 23 comes to engage a punch veil 31. When the punch veil arm 7, which swings about the pin 6 in accordance with the rotation of the main shaft 1, is swung in the counterclockwise direction, the punch arm 18 is swung also in the counterclockwise direction through the punch veil 31, whereby the punch pin 19 is lifted to effect the punching in the tape 17, as shown in FIG. 2A. As the punch pin 19 reaches the uppermost point in its stroke, the hook pole 22 engages the blocking pole again. Accordingly the hook pole 22 is rotated counterclockwise by the force exerted by the spring 23, about a point where the hook pole contacts the blocking pole. This brings about the disengagement of the hook pole 22 from the punch veil 31 whereby the punch arm 18 is allowed to rotate to abut the stopper 32 with its end lowering the punch pin 19 to its lowermost position.

Now an explanation will be made as to the timed relationship between the punching operation and the intermittent feeding of the tape.

If the pin 8 and the pin 12 were disposed on a common radial line with respect to the central axis of the main shaft 1, the reciprocatory motions of the punch veil arm 7 and the feed arm 11 would be represented by curves a and b in FIG. 3, respectively. It will be observed that there is a phase difference of 180 between these curves, which difference corresponds to the differential eccentric direction angle of 180 between the first and the second eccentric rollers 3 and 4.

However, as aforementioned, the actual arrangement is such that the pins 8 and 12 are deviated from each other by some 90 about the axis of the main shaft 1, and the reciprocatory motion of the punch veil arm 7 should be represented by a curve a which lags behind the curve a by 90. In FIG. 1, the punch veil arm 7 and the feed arm 11 are shown in their positions corresponding to the moment to in FIG. 3, at which the punch veil arm 7 is at its uppermost position, while the feed arm 11 is at midway of its stroke.

When the punch veil arm 7 is at its uppermost position, i.e. at moments t t.,, and t the electromagnet 28 is energized to release the hook pole 22 from the blocking pole 25, then the hook pole 22 comes to engage the punch veil 31 so that the punching pin 19 is moved upwardly as the punch veil arm 7 swings about the pin 6. At a moment about the punching pin 19 reaches the uppermost of its stroke to effect the punching in the tape 17. Also at the moment the hook pole 22 engages the block pole 25 again, and then the hook pole 22 leaves the punching veil 31 upon being pulled by the spring 23, whereby the punching pin 19 is lowered to its lowermost position, to complete one cycle of the punching operation. Thus, referring to FIG. 3, the electromagnet 28 is energized at the moment t the punching pin 19 effects the punching at the moment close to and the cycle is completed at the moment soon after the It will be understood that the second cycle of the punching operation is commenced at the moment 2 at which the electromagnet 28 is energized for the second time, and the subsequent operations are carried out in the same manner.

Turning now to the intermittent feeding of the tape 17, an electromagnet 33 is energized at a moment t at which the feed arm 11 is at the lowermost of its stroke (See curve b, FIG. 3). A feed pole pusher 34 is then moved leftwardly, as viewed in FIG. 1, to rotate the feed pole in the direction of the arrow 35 whereby the beak-like end of the latter engages the toothed wheel 16. The feed pole 15 is then moved upwardly to drive the toothed wheel, as the former is lifted by the feed arm 11. Thus in reference with the curve b, the feed pole engages the toothed wheel 16 at the moment of t and the intermittent driving of the toothed wheel 16 takes place during a period of At around the moment t whereby the tape 17 is intermittently advanced by one pitch. The feed pole 15 reaches at the uppermost position of its stroke at the moment t and is returned to the lowermost position at the moment At this moment t;,, the electromagnet 33 is energized again to make the feed pole 15 engage the toothed wheel for the second cycle of advancement of the tape 17.

As can be clearly seen from FIGS. 2 and 3, the punching is effected at moments near t and t while the feeding of the tape is carried out at moments near t and It will be understood that the punching operation and the feeding of the tape are affected in a timed relation with each other, i.e. alternatively, without interrupting each other.

From the foregoing description, it will be appreciated that the present invention provides a punching machine which can punch and feed the tape at much higher speed than the conventional punching machine which owe their power for punching and tape feeding to respective electromagnets, since the machine of the present invention makes use of the torque of an electric motor the power available which is usually much greater than the power of electromagnets. It is also to be appreciated that the punching operation and the feeding operation take place alternatively without interrupting each other, which endows the punching machine of the invention with elevated operation speed.

Various modifications can be made without departing from the scope of the invention. For example, the angular deviation of the shaft 8 from the shaft 12, which is described as amounts to 90, may be designed in other angles, provided that the angular relation between the two eccentric shafts 3 and 4 are selected suitably to provide the alternative operation of the punching and the tape feeding.

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

I claim:

1. A punching machine comprising: a main shaft adapted to be driven at a constant speed by an electric motor; a first and a second eccentric rollers mounted on said main shaft, having their maximum eccentricities disposed 180 from each other; means for effecting punching including a punch veil arm adapted to be pivoted about a fixed point, a punch pin adapted to be moved upwardly and downwardly, and a transmitting means for transmitting the reciprocatory motion of said punch veil arm to said punch pin; means for feeding a tape to be punched including a feed arm adapted to be also pivoted about said fixed point, and a toothed wheel adapted to be driven by said feed arm intermittently; a punch drive link rotatably attached to said first eccentric so as to reciprocate upon rotation of said first eccentric, and connected to said punch veil arm; and a feed drive link rotatably attached to said second eccentric so as to reciprocate upon rotation of said second eccentric, and connected to said feed arm, the connection of said feed drive link with said feed arm being disposed from the connection of said punch drive link with said punch veil arm wherein said eccentric rollers, said punch veil arm and said feed arm are so arranged that the up and down motion of said punch pin and the intermittent rotation of said toothed wheel may occur alternatively.

2. A punching machine as claimed in claim 1, wherein said transmitting means for transmitting the reciprocatory motion of said veil arm to said punch pin wherein said punch arm carries at its one end said hook pole and said punch pin at its other end.

4. A punching machine as claimed in claim 1, wherein said means for feeding the tape includes an electromagnet, a feed pole carried by said feed arm and having a portion for engaging said toothed wheel, and a feed pole pusher adapted to move said feed pole to make the latter engage said tooth wheel when, said electromagnet is energized.

Claims (4)

1. A punching machine comprising: a main shaft adapted to be driven at a constant speed by an electric motor; a first and a second eccentric rollers mounted on said main shaft, having their maximum eccentricities disposed 180* from each other; means for effecting punching including a punch veil arm adapted to be pivoted about a fixed point, a punch pin adapted to be moved upwardly and downwardly, and a transmitting means for transmitting the reciprocatory motion of said punch veil arm to said punch pin; means for feeding a tape to be punched including a feed arm adapted to be also pivoted about said fixed point, and a toothed wheel adapted to be driven by said feed arm intermittently; a punch drive link rotatably attached to said first eccentric so as to reciprocate upon rotation of said first eccentric, and connected to said punch veil arm; and a feed drive link rotatably attached to said second eccentric so as to reciprocate upon rotation of said second eccentric, and connected to said feed arm, the connection of said feed drive link with said feed arm being disposed 90* from the connection of said punch drive link with said punch veil arm wherein said eccentric rollers, said punch veil arm and said feed arm are so arranged that the up and down motion of said punch pin and the intermittent rotation of said toothed wheel may occur alternatively.

2. A punching machine as claimed in claim 1, wherein said transmitting means for transmitting the reciprocatory motion of said veil arm to said punch pin includes an electromagnet, a blocking armature adapted to be attracted by the electromagnet upon energization of the latter, a blocking pole adapted to be rotated by said armature when the latter is attracted and adapted to block a hook pole against a biasing force of a spring when said armature is not attracted, a punch arm carrying said hook pole, and a punch veil provided on said punch veil arm for engaging a portion of said hook pole when said hook pole is released from said blocking pole.

3. A punching machine as claimed in claim 2, wherein said punch arm carries at its one end said hook pole and said punch pin at its other end.

4. A punching machine as claimed in claim 1, wherein Said means for feeding the tape includes an electromagnet, a feed pole carried by said feed arm and having a portion for engaging said toothed wheel, and a feed pole pusher adapted to move said feed pole to make the latter engage said tooth wheel when said electromagnet is energized.

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