DE3019037A1 - Automatic scanner for shoe-making punch - detects position of punch head using moving sensor - Google Patents

Abstract

The scanner has a head moving horizontally and vertically over the punch's anvil on which the material being punched to pattern is placed. The punch head is lowered onto the material and pressed down. The head is displaced under the control of a control circuit and accordingly executes a complete sequence of movements. The circuit contains a sensor mounted on the head to detect the position of the punch head on the material. The output from the sensor is used to stop the horizontal motion of the head when the head is above the punch head in its required position.

Description

Device for automatic palpation of the punching

.eisens, with appropriate control, for a punching machine, especially for the manufacture of footwear "DEVICE FOR AUTOMATIC FINDING OF THE PUNCHING BLADE WITH THE APPROPRIATE CONTROL, FOR A PUNCHING MACHINE, ESPECIALLY FOR THE MANUFACTURE OF FOOTWEAR ".

The present invention relates to an apparatus for automatic Feeling the punch, with the appropriate control, - for punching machines, especially for the manufacture of footwear, in which one is movable and with means to move it back and forth in horizontal and vertical lighting Head is located above a solid striking surface on which the material to be punched is located lies, on which a punch is set in turn from time to time, which during the punching phase is pressed downward by said movable head.

The device according to the invention is suitable for punching machines -of the type with arm as well as in bridge design with movable head, for punching of any kind of foil material.

In the punching machines used today, -after the punch is placed on the material to be punched, the movable head over by hand Positioned the punch, then the signal to lower the head for execution the punching is given. To simplify the operator's task is In some punching machines in use today, a motorized drive for the Horizontal displacement of the head with control by push-button switch or the like intended. In this case too, however, the positioning of the head has to be overdone the punch can be monitored directly by the operator who is responsible for stopping the Horizontal movement of the head has to intervene? if this the has reached the desired position. The operator then controls the lowering again of the head to carry out the punching and consequently the lifting to carry out of the subsequent work cycle.

However, as can be seen, the punching machines require of the known type the constant attention on the part of the operator what this Makes kind of work especially strenuous.

In addition, the centering of the copper over the punch is a matter of experience and left to the trained eye of the operator, which is not always too perfect Satisfactory results, but above all always the intervention of requires particularly experienced personnel.

The main purpose of the present invention is that mentioned above Avoid disadvantages that relate to the systems in use today, by a device for automatically sensing the punch with a corresponding Control for a punching machine is implemented that is clean and precise Guaranteed work without the constant attention of the operator too require and this only overloaded the task of the punching iron on the to be punched Set material and trigger the start signal. In this way the punching machine can be operated by unspecialized staff, which is a considerable discount the production costs.

Another important purpose of the present invention is to be a to produce an automatic device for punching machines that works safely and accurately, around at reduced to a minimum Cycle times are always the same Ensure punching.

These and other purposes that may arise from the following Description obvious, are achieved by the device for automatic Feeling the punch with a corresponding drive, according to the invention, for a punching machine in which a movable and with means to its back and sliding the provided head over in the horizontal and vertical directions a solid face on which the material to be punched lies, and on which in turn a punch is set from time to time, which during the Punching phase is pressed down by said movable head, the Drive device is characterized in that said means for displacement automatically controlled by a circuit for the drive, which by manual means for starting is locked, this circuit for the drive Provides means for producing a complete sequence of movements of the head, from the positioning of the same over the punch to its lowering and finally, after punching, its return to the starting position, whereby the same circuit contains a sensitive element that is on the said Head to automatically feel the mentioned punch, which is located on the material to be punched is located, is mounted, as well as for automatic stop the horizontal displacement of the head when it is in the initial phase of the called work sequence over the punch even in Punching position.

According to another characteristic of the present invention, there is the above-mentioned sensitive element consists of an inductive flat switch, the located on the side of said head and with said punch for the purpose of automatic stopping of the - horizontal shift and the following: Se.-ken of the head cooperates after the inductive flat switch itself has run over the said punch itself.

To always center the head in relation to the punch Obtaining of different dimensions contains according to another property the invention said circuit for the drive an adjustable timer, which is connected to said inductive surface switch to stop the horizontal displacement of the head and the subsequent lowering of the same delay if the punching tool mentioned and placed on the material to be punched has only small dimensions.

Further properties and advantages of the invention can be found in the detailed Description of a preferred, but not exclusive, form of implementation a device for automatically sensing the punch with a corresponding one Drive out for a punching machine with an arm, as it is purely as an example and not limited with reference to the accompanying drawings which: - Fig.1 represents the view of such a punching machine, which is equipped with a device is provided according to the invention ;; - Fig. 2 is a side view, partly in cross section, of the same punching machine; - Fig. 3 is a horizontal one Cross-section of the device for horizontal displacement of the head of the machine; - Fig. 4 shows a schematic of the electronic circuit for the drive.

With reference to the figures, a total of 1 became a punching machine denoted by arm that with the device for automatic palpation for the Invention is provided.

However, the same device can also be used on punching machines Type, such as on bridge punching machines with movable Minds.

As particularly shown in Figures 1 and 2, the illustrated punching machine a base 2, which on its -upper - side describes a horizontal fixed face 3, over which a movable head 4 is provided, mounted in the form of an arm on a stand 5 with a vertical Axis.

The head 4- has a horizontal plate 4a on its lower side, which-turns in the punching position of the striking surface 3 to the punching tool Steel 6, which is placed on the film material 7 to be punched (-Fig. 1) to press down, with the material-in turn-lies on the face 3.

The head can be moved back and forth horizontally and vettically. More accurate said is a lifting and lowering movement along the axis of the vertical stand 5 provided, which are obtained by drive means known per se (not shown) become, as for example according to the type of fluid dynamics. ln horizontal Direction is also provided that the head 4 is angularly around the axis of the stand 5 can move back and forth through a mechanism which is shown in Fig. 3 is shown. This mechanism contains a gear 8 with vertical Axis drawn on a vertical column 5a that extends axially inside of the stand 5 moves and carries the head 4, as well as a Zalinstab 9, which is in the Gear engages and is molded into a piston 10 with a horizontal axis, the moves in a corresponding oleodynamic cylinder 11. This cylinder borders on one and the other side of the piston 10 two chambers lla and lib ab, which are alternately connected to an oil supply under pressure and a drain, so that the angular displacement of the head 4 by the rack 9 and the Gear 8 is reached.

Of course, instead of the mechanism shown in Fig. 3, a another equivalent mechanism can be used, for example from a Electric motor and a corresponding kinematic connection can exist.

It is also provided that the head 4 in the rest position laterally is positioned, with reference to the figures for example on the right, such as is shown with solid lines in Fig. 1 and with dashed lines in Fig. 2. In this position, the head 4 is also one against the striking surface 3 certain piece raised (adjustable accordingly).

The work cycle looks like a continuous sequence and be beginning with the above rest position, the clockwise rotation of the head 4 around the axis of the stand 5, until the head itself is over the die 6 is located, after which the horizontal displacement is stopped and the lowering takes place of the head 4 to carry out the punching process begins, after which the head lifts again and rotates counterclockwise until it reaches the starting position has and lasts. This work sequence takes place automatically without any intervention of the operator is required, except to start the cycle itself, such as will be described below.

The work cycle is started by printing both on them Hands of the operator on two sensitive starting plates 12 and 13, which are connected to a some distance from each other at the front of the machine near the face 3 (Fig. 1) are attached. This process, which for safety reasons, the Betutigung requires both hands of the operator to activate the electrical circuit for the drive as shown in Fig. 4.

To automatically feel the punch 6 and to stop the Horizontal displacement of the head 4 is an inductive area switch in the form of a rod 14 is provided, which is arranged on the side edge of the plate 4a of the head 4. The rod 14 appears on the lower surface of the plate 4a so that it has the presence the metal punch 6 sensed when driving over it and then a signal which is processed by the circuit as in Fig. 4. This signal exists during the entire time that the rod 14 is above the punch 6, around stop when the same rod run over the punch Has.

During the broadcast of the above signal by the wand 14 the simultaneous charging of two capacitors 15 and 16 takes place (Fig. 4). The discharge time of the capacitor 15 is determined by the properties of the capacitor self-determined, while the discharge time of the capacitor 16 is set and with Hill! E a timer "timer" 17 can be extended at will.

If there is a die of large dimensions on the work surface is the signal emitted by the wand 14 while the head is horizontal shifts, extended, since a correspondingly longer time is required before the Rod itself has run over the punch. When the signal ends or

when the rod has passed the punch, the capacitor discharges 15 and through the transistor 18, the power transistor 19 becomes a conductor, namely with subsequent excitation by closing a contact 25 of the relay 20, which triggers the contacts 20a and 20b. Actuation of the relay 20 takes place practically at the same moment that the rod 14 moves over the punch. Of the Contact 20a is therefore from the closed position (as in Fig. 4), in which the The solenoid valve 21 is energized and the head 4 rotates clockwise (using the mechanism in Fig. 3) into an open position over, in which the energization of the solenoid valve 21 ceases and consequently the stoppage the rotation of the head 4 takes place.

Since a case was considered in which a punch of large Dimensions is used (i.e. with a width only slightly less than that of plate 4a), the head is necessarily stopped when this is basically over is centered on the punch.

Simultaneously with the opening of the contact 20a, the closing takes place of the contact 20b, which causes the solenoid valve 22 to be energized, whereby the Lowering the head 4 is controlled to carry out the punching process. After completion The same controls a limit switch (not shown) - the return of the head in the raised position and consequently its counterclockwise rotation up to stopping in the starting position (to the right).

The machine is thus ready for the execution of a subsequent work cycle -ready, - which begins as described above as soon as the operator both again Hands on the two sensitive plates 12 and 13 presses.

In the case of a die of small size or small width the signal from the rod 14 while the head is shifting horizontally is short Duration, which is why in the absence of the capacitor -16 and the "trimer" 17 the discharge of the capacitor 15 would occur too quickly, i.e. stopping and the lowering of the head 4 would take place as soon as the rod 14 has passed over the punching iron However, in the assumed case of small width, the head 4 relative to the punch itself in an off-center position to stop come, with the consequent impossibility of a uniform punching process due to the eccentric loads that unites disadvantageous inclination of Head would cause the presence of the capacitor 16 and the "trimer" -: encoder 17 avoids this disadvantage by stopping the movement in the clockwise direction of the head 4 delayed accordingly. So while the capacitor 15 is immediately, after the rod 14 has passed the punch, discharges, the capacitor remains 16 by regulating the "trimer" 17 for a certain period of time: loaded, like that that the turning in the clockwise direction of the head is still further chin. By a corresponding setting of the "trimer" timer 17 depending on the dimensions of the punching iron is achieved that the discharge of the capacitor 16 then takes place, when the head is centered over the die.

During this discharge, transistors 23 and 24 provide how already described above, the circuit of the relay 20 to stop the rotation in Clockwise direction of the head and lowering it in order to carry out the punching process. Immediately after punching, the head is lifted in the same way as above and its counterclockwise movement until it reaches the rest position. The punching machine is therefore ready for a new work cycle.

After what has been described, the function of the device lies according to the invention clearly obvious.

The operator has nothing more to do than do each one from time to time St: mark on the material to be punched 7, that it rests on the striking surface 3, and then start the duty cycle by simply holding both hands on the sensitive plates 12 and 13 presses. As above seen, the work cycle runs completely automatically db, without any special Attention on the part of the operator is required. Actually, it wilts the head zuntichst clockwise and automatically searches for the punch for what it stops when it reaches the centered position over this die jiat, regardless of the dimensions of the same, the punching process takes place immediately afterwards by lowering the head, consequently raising it and returning in the starting position, always on an automatic path. When the head is in the side The operator can work comfortably on the striking surface 3.

It has to be mentioned that when the operator takes the hands off the sensitive plates 12 and 13 lifts off, the machine automatically in position stops in which it is currently. When hands again on the above Plates are pushed, the head 4 moves in the opposite direction, so that the operator also avoid a complete back and forth movement of the head 4 can if the punching dies are of small dimensions, reducing the working hours As can be seen, the device ensures after of the present invention a virtually perfect automatic punching cycle, by definitely centering the head over the punch of different Dimensions takes place, the task of the operator is made much easier and work of optimal quality is guaranteed, even if not specialized staff.

Of course, the invention is not limited to the sole one described above Implementation form is limited, but there are numerous changes and variants possible, all of which are within the scope of the invention.

For example, in the case of the use of Brückeri punching machines with movable carriage this on the two opposite sides with two inductive rod switches, so that the punching iron can be felt can take place automatically, either in one direction or in the other.

SUMMARY Device for automatic sensing of the punch with the appropriate drive for punching machines, especially for the production of Footwear - in which ice is more mobile and with means to move it back and forth Head provided horizontally and vertically above a fixed one Area on which the material to be punched is placed: where the mentioned Means for moving the head automatically through a circuit for the drive which is locked by manual starting means. This Circuit for the drive provides means that have a complete sequence of the movements of the head, from its position above the Punching iron up to its lowering and consequently its return to the starting position after the stan process.

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Claims (6)

PATENT CLAIMS 1)). Device for automatic sensing of the punch with the corresponding control for a punching machine 1, especially for production of footwear, in which one is mobile and with means to his-to-and-fro Moving in the horizontal and vertical directions provided head 4 over a fixed striking surface 3 is located on which the material to be punched 7 spread out- is, on which in turn a punch 6 is set from time to time, - that in addition is determined during the punching phase of said movable head 4 downwards to be pressed, characterized in that said displacement means automatically controlled by a circuit that is controlled by manual means is locked for starting and the means for executing and a complete sequence of the movements of the head 4 -provides, - -Where the circuit is a sensitive one Contains element which is mounted on the -cited head 4, namely to the automatic sensing of said punch 6, which is on the material to be punched 7 is placed, as well as to automatically stop the horizontal shift of the Head 4, if this is in the initial phase of the work sequence mentioned above The punch 6 itself is in its punching position. 2) Device according to the preceding claim, characterized in that that said sensitive element consists of an inductive flat switch 14- consists, which is arranged on one side of said head 4 and with said Die 6 cooperates to automatically stop the horizontal shift and the subsequent lowering of the head 4 as soon as the inductive surface switch 14 itself has passed over the punching iron 6 mentioned. 3) Device according to claim 1, characterized in that said circuit for driving includes an adjustable timer 17 which is connected to the inductive surface switch 14 to stop the horizontal To delay displacement of the head 4 and the subsequent lowering of the same, if the punching iron 6 mentioned and placed on the material 7 to be punched is of small size Dimensions is. 4) Device according to claim 1, characterized in that said manual means for tempering from two sensitive plates 12, 13 or the like exist, which have a certain distance from each other and the mentioned Activate the electric circuit to the drive if both hands are on both 12, 13 at the same time of the operator. 5) Device according to claim 2, characterized in that said inductive flat switch I4 consists of a rod 14 which is on the said head 4 is mounted and appears on the lower surface of the same 4, this rod 14 cooperates with the punch 6 to produce an electrical To send out the signal during the entire time it remains over the punch 6, said electrical signal being processed electronically in the said circuit to the drive to determine the stopping of the head 4, if the named rod 14 has passed over the punch 6 and the head 4 itself is basically centered over the punch 6 itself. 6) Device according to the preceding claims, characterized in that that said inductive flat switch 1 is connected to two capacitors 15, 16 which in turn is connected to the circuit via appropriate electronic components connected to control the displacements of said movable head 4 are to stop the horizontal displacement of the head 4 itself when the above-mentioned capacitors 15, 16 are discharged1 with one of the two 16 with an adjustable timer, for example a "timer" 17 for extension the corresponding discharge time is connected to the halting of the horizontal displacement of the head 4 to delay when said inductive surface switch 14 is a punching iron 6 of small dimensions has passed.