JPS6071276A - Drive for marking press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides two complementary molds, which are placed at rest positions facing each other at a static distance, with respect to the stamp plate held at the stamp position, and are directed in the direction of mutual relationship. The present invention relates to a drive device for a stamping machine that embodies using stamping pressure.

The above-mentioned engraving machine is used to stamp letters or other information on a metal or plastic engraving plate, such as an address plate used in a mail processing machine or a card generally called an identification card used as a credit O card. Used to engrave symbols.

The above model of stamping machine (for example, FR-PS2348B2
1), the mutually opposing molds are arranged on the circumference of two mutually opposing disks,
It is mounted in at least a rest position. The disc is axially displaceable and rotatable with a common axis.

This common shaft is rotatably attached to a support, and on both sides of the pair of disks, each activation lever is hinged approximately at its center and extends approximately at right angles to the shaft. There is.

At one free end of the two mutually opposing actuating cylinders, an axially extending sliding bolt is provided, by means of which a pair of molds can be rotated and any pair of molds can be selected. I can do it. The opposite free ends of the activation lever approach a cam disc located centrally between the free ends.

The axis of rotation of this cam disk is perpendicular to the axis of rotation of the activation lever. During this rotation of the cam disc, the free ends of the activation levers with sliding bolts approach each other, so that under the stamping pressure the molds of the selected pair are stamped onto the stamping plate inserted between them. Jlro. Therefore, when it comes to normally engraved characters, complementary molds with one side intaglio and the other in letterpress are mutually suppressed by high pressure. is embossed.

When stamping known characters or numbers, the pressure applied depends on the shape and size of the characters, as well as the hardness and inner thickness of the plate to be stamped. Therefore, there is a difference in the range of 1ooo to 700ON. Each letter is only 0.5 J1% high.
Since it is only aa or less, the displacement distance at which the above-mentioned large marking pressure occurs is extremely short.

Therefore, during the majority of the marking cycle, the load-transmitting parts of the marking machine, such as the shaft, bearings and levers, as well as the drive, are subjected to only small stresses, but during a small portion of the marking cycle, large bearing forces occur. Correspondingly, the drive must generate a large torque. Therefore, for example, mechanical energy storage means, such as a flywheel, may be provided to reduce the horsepower of the drive motor, while
The drive of the known engraving machine is switchable, and by rotating a pair of discs on which the engraving die is arranged, the selected character is set and the discs are moved as desired to fit the rows and columns of five engraving characters before engraving. It is necessary to be able to position it at the position shown in FIG. This requires a clutch joint with dimensions suitable for the maximum torque during marking. However, such a marking device as described above is extremely expensive and is prone to failures, especially when large torques are generated and at the same time there are many marking operations.

Furthermore, drives for marking machines are known in which, by continuously driving a cam disc that drives an activation lever, the clutch joint does not have to be dimensioned to cope with large torques (for example, DE-O83135505 like). In this case, instead of attaching a sliding bolt to the free end of the mold lever, a sliding power transmission member is provided,
This power transmission member is configured to be able to move forward and backward relative to the power transmission path between the activation lever and the mold by means of an electromagnet. When this power transmission member is in its retracted position, no load is applied to the stamping die even if the activation lever is continuously driven via the cam disk.

Therefore, while the power transmission member is in the retracted position, the selected character is set and the engraved plate is introduced into the desired position. However, even in the case of this known drive, its dimensions must be as large as necessary for the maximum torque. Furthermore, relatively expensive electromagnets are also required to move the power transmission member. Finally, since the power transmission member can only move forward or backward when the continuously active marking drive is in the inactive position, the marking machine has a period of inactivity during the marking cycle. Due to this time, 3-3 of the continuous marking drive cycle time becomes an inactive time.

The object of the invention is to improve the above-mentioned disadvantages, in particular the load distribution in drives for marking machines of the above-mentioned type, by eliminating the need for clutch couplings with large load-bearing capacities.

According to the present invention, there is provided a first drive device having a displacement stroke equal to the static distance of the mold minus the wall thickness of the stamped plate;
By means of this first drive, the stamping die can be moved in the mutual direction by a displacement distance and reach the stamping plate.
Furthermore, the above-mentioned problem is solved by providing a second driving means that performs a relatively light marking operation with respect to the displacement stroke and then applies a pressing force to the marking die that has moved to the plate to be marked.

According to the present invention, the first driving device approaches the selective marking mold to the extent that it touches the marking plate. The first drive is therefore of sufficiently small dimensions to overcome the friction forces in the guide and bearing means of the marking machine and the resetting forces that may occur. In practice, by the time the plate is touched, the displacement force applied due to the displacement stroke is rarely more than 50 to 10 ON, and therefore it is approximately 0.7 to 10% of the maximum force that would occur if the required stamping pressure was applied. It would be only 1.5%.

However, the second drive will in practice produce an engraving force in the range of %1000 to 700 ON only when performing a relatively very small engraving stroke relative to the displacement stroke. The second drive must therefore be dimensioned appropriately for high pressures, but the working stroke may be very small.

A preferred embodiment of the drive device is characterized in that the second drive device is provided with an electromagnet which serves as a drive source and is movable through the marking distance and is equipped with a 71 armature. This electromagnet is particularly suitable for applying high pressures in the case of very small displacement movements, which greatly increases the reliability of the operation of the second drive and allows for a simple construction. It is known to use electromagnets as drives in riveting machines or vibratory drilling machines, in which case the armature of the electromagnet is accelerated over a relatively long distance to a high speed and its kinetic energy is A desired large impact is obtained by converting the impact vibration with a filter. However, this is accompanied by extremely high levels of noise.

On the other hand, when the marking action is performed by a second drive device equipped with an electromagnet, the armature within this electromagnet only needs to perform the marking action by a fraction of a millimeter to stamp the characters. Since then, it has been at rest.

Despite the fact that the marking speed is very high, above 2000 N/ms, and the armature is accordingly highly accelerated, the movement of the armature is relatively slow. SoJ
l because practically all the energy resulting from the moving parts is used for the marking action. Therefore, the energy that causes noise generation is extremely small and practically negligible.

In accordance with the invention, two activation levers are hinged to a hinged position mounted on the frame of the marking machine at a central location between their free ends, and the activation levers are spaced apart by an opposing offset distance between their free ends. The driving device of the embodiment is such that the molds are placed facing each other, and opposing molds are disposed between them, and a load is applied in the direction of the plate to be engraved using these free ends, and the driving device is applied to the opposite free end. , at the opposite free end of the activation lever.

Each free end of the lever arm of the toggle joint is hinged, a lever is connected to its connection point, and a push rod with an armature is hinged, which armature aligns the axis of the electromagnet of the second drive. The free end is characterized in that it is not loaded in the axial direction by the first drive. With this embodiment, the first and 8g2 drives can be
The result is a reliable co-operation with respect to the structure, so that the forces produced by both drives act in common on the push rod.

In this respect, the first drive could also include a cam disc acting on the free end of the push rod and being driven by an electromagnet via a clutch coupling. However, in this clutch joint, the first drive only acts to overcome the displacement stroke of the push rod, and the marking suppression is applied by the second drive, so it overcomes the frictional force and the reset force. may be of small dimensions suitable for only a force of .

Furthermore, a further embodiment provides that the first drive device is provided with a drive lever, with one free end of the drive lever acting on the free end of the rod and the opposite free end stationary with respect to the frame. It is characterized by being hinged and capable of applying a load force in the axial direction using electromagnetic force. A particular advantage of this embodiment is that the number of moving parts is reduced due to the omission of a drive motor and a clutch coupling. Therefore, the number of worn parts is reduced, and therefore manufacturing costs and repair costs can be reduced. Furthermore, the continuously operating drive motor produces no idle noise.

In order to reliably reset the stamping machine and drive of the above type to a precisely defined rest position, the toggle joint is loaded with a reset spring Mff: so that both activation levers are at least at the rest distance of the stamping die. I found it convenient to be able to set it to a corresponding rest position.

The resetting spring is a tension spring, one end of which is fixed stationary in the frame, the other end of which is attached to the connecting point of a separate toggle joint, and one lever arm of the toggle joint, together with its free end, is The embodiment described above can be realized with a simple structure in which one activation arm is hinged to the other free end and the opposite lever arm is hinged to the frame in a stationary state.

According to features of another preferred embodiment of the drive for a marking machine, the first and second electromagnets of the second drive each have an activation member having an armature, the armatures facing each other and facing the marking position. movable within the electromagnet along a common axis between the free ends disposed with a stamping die, the mutually opposite free ends being engaged by an actuating member, the actuating member being movable by a first drive. and approach each other to perform a displacement stroke. In this embodiment, the stamping pressure is advantageously transmitted directly to the actuating member of the stamping mold, so that there is no need to intervene with a lever device with a high load-bearing capacity. Furthermore, the second drive allows the two activation members to be activated independently of each other.

According to another embodiment, the first drive device comprises two opposing drive levers arranged at approximately right angles to a common axis, the free ends of the drive levers opposite the common axis being stamped. The machine is hinged at rest and the opposing free ends are each capable of engaging an activation member to apply a respective torque acting in the direction of the stamping die. The drive lever therefore only needs to be dimensioned to be suitable for the small values of the loads occurring during the displacement stroke.

In order to facilitate the resetting operation, in another embodiment the drive lever is biased by the force of a spring and remains in its rest position against a torque acting in the direction of the 5 imprint.

According to another embodiment, the first drive includes two drive levers driven by the motor via a clutch coupling and each connected to a hinged point between the ends of the drive lever via a connecting rod or the like. A crank gear is provided. Since the motor only needs to provide a small horsepower for the displacement stroke, the dimensions of the clutch coupling, crank gear and connecting rod can be correspondingly small.

This embodiment is preferably designed so that the two crank gears make separate strokes.

For example, one stroke may be in a stamping position where the associated stamping die acts as a stationary support.

As a variant of the above embodiment, the drive device according to the invention further provides that the drive lever of the first drive device has an armature plate between each end thereof, on which part each electromagnet arranged oppositely acts. You can make it possible. This embodiment has the advantage of reducing the number of moving parts and therefore of significantly increasing reliability of operation and requiring less maintenance.

Regarding the structure of the second drive device, in the case of the embodiment described above, the activation member is formed as a push rod passing through the axis of the electromagnet.1. It has been found convenient to fasten an armature in the form of a radially extending plate to this push rod.

This embodiment allows the electromagnet to directly transmit the magnetic force acting on each actuating member, thus increasing efficiency on the one hand and, on the other hand, greatly simplifying the construction since no power transmission member is required. can do.

The magnetic force is utilized particularly effectively by an embodiment in which the plate constituting the root is placed on the push rod at a distance approximately corresponding to its maximum stroke from the front side of the electromagnet opposite the stamping die. be able to.

In another embodiment, which is characterized by simple construction and low friction, the free end of the drive lever, which can engage with the push rod, constitutes an armature and is connected to the opposite side of the stamping die. The armature plate is supported on each front side of the armature plate.

Finally, in the embodiment described above, it is advantageous if the activation member is biased into its rest position by the force of a spring against the direction of displacement with respect to the plate to be engraved, and is able to return exactly to its rest position. That's what I found out.

According to another idea of the invention, the drive with the second drive is provided with two magnets, and the first drive allows
One of the two armatures associated with both electromagnets of the second drive can approach this electromagnet, and the armature associated with one of the electromagnets is displaced in front of it by a distance corresponding to the maximum stroke. , the armature is in this position, the first
It is energized by a second vibration that oscillates later than the pulse and stops at the same time as the first pulse. The armature, which is moved by the first drive up to the electromagnet, therefore remains in that position during the first pulse time, and the stamping die associated with this armature constitutes a support for the stamping; At the same time, the marking plane is defined.

At this holding position, next, a stamping force is applied to one of the stamping dies by one of the electromagnets by a second pulse, and a stamping stroke is performed. both pulses.

When the stamp stops, the actual stamping action ends and the stamping die can be returned to its rest position by means of an elastic return force.

Finally, within the scope of the invention, it is proposed to energize the electromagnet of the second drive with a capacitor discharge pulse. This allows the force within the electromagnet to be increased sufficiently, rapidly, and easily.

For this reason, it has been found that particularly advantageous results can be obtained by controlling the pulse energy depending on the type of engraved characters. With this method, it is possible to easily satisfy the requirement that the height of the markings be kept as constant as possible for all the marking characters, so that the markings of the characters can be uniformly performed. Accordingly, a very wide variety of marking forces can be obtained in a very simple manner by controlling the respective pulse energy according to different character heights and presentation lengths.

In contrast to the devices described above, known marking machines with eccentric or plunger drives do not allow full control of the marking stroke. Unless you use molds of different lengths and utilize the elasticity of the frame to apply various stamping forces, it is not possible to obtain various stamping forces that match the height of the characters.

In practice, a length of the stamping die of 6 to 5 groups is sufficient in most cases, but the required spring force characteristics of the frame and those of the drive must be matched as closely as possible. Therefore, when manufacturing a stamping machine, a relatively large amount of cost is required. On the other hand, 5 fruits according to the present invention! In this embodiment, as long as the energy supplied to the electromagnet is changed according to one selected character, the stamping force can be changed in a simple manner, so that stamping dies of the same length can be used.

In addition, the power distribution method can be realized in a particularly advantageous manner by selectively connecting discharge capacitors of different capacities in parallel in the discharge circuit to control the pulse energy. In this case, it is preferable to selectively switch a predetermined charging capacitor in the discharge circuit using a thyristor.

A particularly advantageous feature of the Kono connection is that the control of the pulse energy is carried out using a computer.

This allows the pulse energy supplied to the electromagnet to be varied in a simple manner. In particular, no matter how you combine it with a microcomputer,
It becomes possible to easily fire the thyristor.

Other features, details and advantages of the invention can be learned from the following description and details, and from the accompanying drawings, to which reference is specifically made.

As shown in FIG. 1, the marking machine 1 comprises a frame 2 with two mutually opposing actuating levers 3.3'Y.

The actuating levers 616' are arranged approximately parallel to each other at a certain distance, and the respective free ends 4, 5 or 4/4/
, 5/ are pivoted to the frame 2 at the same height at a connecting point 6 or 6' located between them.

Between this activation lever 6.3', two flat disk-shaped drums 7.7' are provided parallel to each other at a certain distance, and the drums 7.7' are connected to the activation lever 3.6'. On the other hand, the spray is applied almost parallel to the center of the rotating shaft 8 that extends to the free position of the activation lever 6-3'. Over the outer periphery of the drums 7, 7', stamping dies 9, 9' are provided and moved in the axial direction. The mutually opposing engraving dies 9 and 9' are aligned along an axis parallel to the rotation axis 8 and are in a mutually complementary state, i.e. the engraving die 9 has, for example, a convex shape of the engraved character, and the engraving Type 9
' is the opposite concave shape. Both stamping dies 9, 9' are biased by return springs io, io' into their respective rest positions 5, in which they face each other at a fixed distance.

A pressure screw 11.11' is arranged at the free end of the activation lever 6.6' remote from the frame 2 and extends in the direction of the axis of rotation 8. The drum 7.7'w is centered around the rotating shaft 8.
By rotating, the various opposed stamping dies 9#9' arranged on the outer periphery of the drum 717' will pass through the pressure screws 11, 11' and be aligned with a common axis extending parallel to the rotation axis 8. An intermediate protrusion 12. i2' is disposed movably in the axial direction, and a bearing (not shown) stationary with respect to the frame 2 is moved by a return spring 16 to the actuating lever 6.6.
5, which is biased in the direction of
4 are held in a stamped position on a common axis by a guide device (not shown). When the free ends 5 and 5' approach each other, the stamping die 9.9' is pressed against the plate to be stamped 14 via the intermediate protrusion 12, 12'Y, and therefore, with sufficient stamping pressure, the plate to be stamped is 14 can be embossed with desired characters.

Opposite free end 4 of activation lever 3, 6' facing the frame
・Lever arm 15, 15 of toggle joint 16 is attached to 4'.
' free end is hinged and Leno (-arm 15
・One in 15'! , the push rod 19 is swingably connected to the push rod 19 via the bracket 1B at the connection point 17.
is along approximately the midline between both activation levers 6.6',
It extends in a direction parallel to both activation levers 6 and 6'. Another toggle joint is provided with the free end of the arm 20.
The free end 4 of the activation lever 6' is hinged to the frame 2 and
' together with the free end of another lever arm 21 at the hinged point.

One end of a tension spring 74 hinged to the lever arm 15' of the toggle joint 16 acts on the intermediate connection point of this further toggle joint, the other end being stationary relative to the frame 2. This spring causes the activation arm 16' connected to the toggle joint 16 to return to its rest position, and the stamping die 9
19' is also pulled to its rest position.

The first drive device 3 that moves the push rod 19 in the axial direction and pulls the toggle joint 16 is the push rod 19 on the opposite side of the toggle joint 16.
Acts on the free end 22 of. The pressure spring is displaced by the displacement stroke of the first drive device until it comes into contact with the stamped plate 14. Therefore, the first drive device 2'5
．． 9' is displaced by a distance obtained by subtracting the wall thickness of the marking plate 14 from the static distance of both. Since the marking plate 14 is not yet stamped, the first drive device 26 only needs to be able to overcome the frictional forces and reset forces within the marking machine 1.

The second drive 24 includes an electromagnet 25 by means of which the push rod 19 is guided along the axis of its axis and through said electromagnet 25 in the direction of action of said electromagnet. push rod 1
An armature 26 in the shape of a plate extending in the radial direction is provided on the electromagnet side facing toward the free end 22 of the armature 9 . The armature 26 is attached to the push rod 19 at a distance from the front surface of the electromagnet 25 corresponding to at least the displacement stroke of the first drive unit 23 plus the slight marking stroke.

The first drive device 23 according to the embodiment shown in FIG. 1 rotates about an axis perpendicular to the push plate 19.

A stationary cam disk 27 is provided for the frame 2, and the cam disk 2 acts on the free end 22 of the push rod 19. The cam disk 27 is driven by an electric motor 29 via an electromagnetically activated clutch coupling 28.

To start the engraving cycle, press the electric switch 1iON
Then, the electric motor 29 activates the cam disk 27 in a counterclockwise direction to operate the clutch joint 2B.

Therefore, the armature 26 that is not mounted on the push rod 19 is
Approach the drive electromagnet. At the same time, toggle joint 16
The two lever arms 15.15' and the two lever arms 20.21 of the further toggle joint move in the direction of the extended position, while the displacement stroke of the first drive 26 is controlled by the pressure screw 11.
, 11' until the stamping die 919', which has been displaced through the stamping die 919', comes into contact with the plate to be stamped held therebetween. Therefore, the driving of the stamping die 919' by the first driving device 26 is only for bringing it closer to the plate to be stamped.

When this position is reached, the electromagnet 25 of the second drive immediately receives an electrical pulse from an oscillating source (not shown), so that the toggle joint 16 is further extended and the stamped die 9.'
9' is embossed on the plate to be engraved 14 by a short engraved stroke relative to the displacement stroke of the first drive device and a moderate engraved pressure, so that the actual marking action is performed.

As shown in FIG.
Another toggle fitting with 2'G+214 is lower stamped type 9'
It is positioned at a specific position relative to a guide device (not shown) for the marking plate 14, and acts to prevent distortion of the marking plate 14, or at least to keep it within the minimum limit.

The other embodiment shown in FIG. 2 differs from the embodiment shown in FIG. 1 only in the design of the first drive 23. In the embodiment shown in FIG. In the embodiment shown in FIG. 2, the first drive device includes a drive lever 30' arranged approximately at right angles to the push rod 19.
One free end (the upper end 61 in FIG. 2) of the drive leno< -30 is in contact with the free end B22 of the pusher 4119, and the opposite free end 62 is hinged to the frame 2 in a stationary state. It's a stop. An armature 66 is fixed between the free ends 31 and 32 of the drive lever 60 so as to face an electromagnet 64, and the electromagnet 64 has its operating axis parallel to the axis of the push rod 19. , mounted in a stationary state relative to the frame. Finally, the drive lever 60 is biased by a reset spring 65 in the direction of the stop 66 opposite to the direction of action of the electromagnet 640 that pulls the toggle joint 16.

The engraving operation method is carried out as in the embodiment shown in FIG.
The electromagnet 34 is energized and the push rod 19 is therefore moved by the drive lever by the engraving stroke in which the engraving die 9.9' contacts the plate to be engraved.

The second drive 24 is then actuated to perform the actual marking operation, as shown in the embodiment of FIG.

In another embodiment shown in FIG.

The second drive device is provided with first and second electromagnets 67 (Ml) and 37' (M2) on each working direction side of the drum 717' of a common shaft, which actuate the drum 717'. The stamping die 9.9' provided above can be aligned by rotating around the rotating shaft 8.The double-shaped magnet 37°67' is configured as a push rod 69 or 69'. Activating members 38, 38' are provided, which actuating members 69, 69' move along an axis within the electromagnet 37 or 67'. At the free end 40 or 40' of the opposite 1111 of the drum 7 or 7', the push rod 3
9.39' is the drum 7 by the return spring 41°41'.
．． 7' to the -rest position, in which position the opposite free end 42, 42' of the push rod 69 or 39', facing the drum 717', touches the stamping die 9, 9 in the rest position.
It faces the free end of ' with some play. On the opposite side of the drum 7, 7' of the electromagnet 67 67',
The armature 4/46', which is a plate-like body along the radial direction, is separated from the front side of the electromagnet 37.37' by a certain distance approximately corresponding to the maximum stroke of the push rod, and the push rod 39.3 is moved away from the front side of the electromagnet 37.37'.
It is installed at 9'.

The push rod 5 is a drive device according to the embodiment shown in FIG.
9.69' with two opposing drive levers 44.44'v arranged approximately parallel to each other at right angles and at a constant distance from each other with respect to a common axis of the drive levers 44.44'. 4
The opposite free ends of the push rods 69, 69' of 4' are hinged in a stationary state to the marking machine 1, and the opposite free ends 46, 46' are connected to the electric machine opposite the electromagnetic filter 7, 37'. Child 4
Support it on the front side of 46'. Two crank gears 47, 47' are provided for transmission to the torque drive lever (-44, 44') which acts in the direction of the stamping die, and the connecting rod 48, 48 between the crank gears 47, 47'. ”& through which each drive is connected to a hinged point located between the free ends of <-44 or 44'. Both crankshafts 47
．． 47' are both connected to the motor 5 via the clutch joint 49.
0 to be driven in the opposite direction. The total stroke b of the crank gear or eccentric cam 47 is smaller than the total stroke a of the crank gear or eccentric cam 47'.

To perform the engraving operation, turn on the clutch joint 49 at the rotation angle ψ=O, and then both drive levers 44, 44
' move in mutual directions. Since the total stroke of <-44 is slightly larger, the armature 46 that contacts with its free end 46 directly contacts the front side of the electromagnet 67 facing the armature 46. Therefore, the push rod 69 simultaneously moves in the direction of the five-stamping die 9 against the force of the return spring 4'1, and lifts the die 9 until it comes into contact with the plate to be stamped 14. at the same time,
By means of the small-stroke drive lever 44', the push rod 69' is pushed in the direction of the stamping die 9' until there remains sufficient clearance for the stamping stroke between the armature 46' and the opposing front faces of the electromagnet 37'(M2'). is displaced. The stamping die 9' comes into contact with the plate to be stamped 14 at this position.

When the push rod 59.39' and with it the stamping die 9.9' are first brought into position by means of the first drive, the second
The electromagnet 37 (Ml) of the drive is energized and its armature 4
6 is attracted by electromagnetic force 67. Then, after a short delay time, the second electromagnetic force 37' of the second drive is also activated, so that the actual marking action takes place. In this way, the electromagnet 37 acts as a stationary abutment and thus defines the plane in which the marking takes place. Therefore, the drive lever 44.44'
returns to its rest position, and in this case the push rod 69
- 69' is also returned to its initial position under the action of the return springs 41 and 41'. The stamping die 9,9', biased by the return springs 10, 10', therefore moves away from the stamping plate 14, so that a new character is set in the stamping position.

One rotation of the crank or eccentric cam of the first drive device ψ = 6
The duration of the 60 DEG engraving cycle is shown in detail in FIG. In this case, the displacement distances of the push rods 39, 39' are respectively Xl and X2. As can be seen from FIG. 4, the energization of the electromagnet 37 (Ml) takes place just before reaching the first inactive center position, and then immediately after a short delay, 'tlI', the magnet 37'1i
2) follows this. After the crank has rotated completely, when the second inactive center position is reached (ψ=660°), the marking action will end.

The only difference between the embodiment shown in FIG. 5 and the embodiment shown in FIG. 6 is the different design of the first drive 7), with three drive levers 44, 44' and a crank gear 47° 47'. Instead of being coupled, the drive lever 44.44' is provided with an armature 51.51' associated with an opposing electromagnet 52.52' between its free ends. The electromagnet 52.52'
acts on each drive lever 44 or 44' with a constant torque in the direction in which the stamping dies 9, 9' approach each other. Fit the drive lever 44, 44', each return spring 56, 56
' acts in the direction of action of the electromagnets 52 (M6) and 52' (M4), and is connected to the stationary stop 54 or 54, respectively.
' Bias the drive lever, i4.44/, towards '.

The manner of operation of the embodiment shown in FIG. 5 is illustrated in more detail in FIG. As is clear from the timetable for starting the marking action shown in FIG. Moving clockwise, the armature 4 and the push rod 69 associated therewith move until the armature 46 contacts the electromagnet 37 (Ml) of the second drive. In this position, armature 37 (Ml) is energized and holds its armature 46 in place. Thereafter, the electromagnet 52 (M6) is deenergized and the drive lever 44 thus returns to its initial position constrained by the stop 53 under the action of its return spring 56. Therefore, the stamping die 9 is positioned in its active position in contact with the plate to be stamped 14.

At the same time as the armature 37 (Ml) is energized, the electromagnet 52' (M4) of the first drive device is energized, and the drive lever 44' causes the stamping die 9' to come into contact with the stamping plate 14. The push rod 69' is displaced together with the armature 46' until the end. As shown in the embodiment of FIG. 3, at this location between the front face of armature 46' and its electromagnet 37' (M2)
When the electromagnet 67' of the drive device is subsequently energized,
Sufficient distance remains to allow the actual marking stroke to be made.

As soon as the electromagnet 37' (M2) of the second drive is deenergized, the electromagnet 52 (M4) of the first drive is deenergized, thereby releasing the drive lever 44' and the return spring 56'. , it returns to its stop 54'.

When one marking is completed, the electromagnet 37 of the second drive device is activated.
37' is also deenergized, so that armature 4 and lightning 4
6' will be released. The push rod 9139' is then retracted by the return spring 41.41' to its rest position, in which position the stamping die 919', biased by the return spring 10.10', leaves the stamping plate 14 and thus You can set the new character to the engraved position.

The stamping force F required to make the height of the engraved letters uniform varies depending on the size of the engraved letters and the length of the offering. For example, FIG. 7 shows the stamping force F for various materials for various characters shown on the abscissa axis. For example, numbers and commas require relatively little stamping force;
For the letters "M" and rWJ, the required stamping force increases. Controlling the stamping force depending on the type of character to be stamped, as in the embodiments shown in FIGS. This is possible by controlling the

An embodiment of the power source for the drive shown in FIG. 5 is illustrated in FIGS. 8 and 9. As can be seen from the charging circuit shown in FIG. 8, electricity is supplied from the AC power source via a rectifier diode 55 and a pulse capacitor 56 .
57.58 are protection and decoupling resistors 59, 60 + 61
are connected in series and then in parallel. Therefore, the pulse conte:/56157.5B is charged at the peak value in the charging circuit.

The discharge circuit for the pulse capacitors 56, 57 and 5B consists of series connected electromagnets 37.37"&, in this case,
This series connection connects one end to the capacitor 5'6, 57.5
8, and the opposite end is connected via each thyristor 62, 63, 64 to the connection point of the pulse capacitor 56, 57, 58 facing the common connection point. .

Further, the electromagnets 67, 67' are bridged with respect to the energizing current of the electromagnet 67, 37' through each diode 65 or 65' which serves as a counter electrode, so that an overvoltage is prevented when the energizing of the electromagnet 37, 37' is released. To prevent. Furthermore, the electromagnet 67 is connected to a preenergizing circuit comprising a protection diode 66, a switching transistor 67, and a full-wave rectifier circuit and a low-voltage mains circuit constituting a filter circuit. This front energizing circuit supplies the front load energy required to hold the armature to the electromagnet 67 before the actual stamping action begins, as described with respect to FIG.

By selectively firing the thyristors 62, 63, 64'aj, charging pulses of the pulse capacitors 56,57+58 can be selectively supplied to the electromagnets 37,37'. In the embodiment shown in FIG. 8, the capacitances of the pulse capacitors 56I57, 58 are selected to be in the ratio 1:2:4, so that the thyristors 62, 6'5.6
4"5 By selectively firing, the pulse-energy can be controlled in a 1:7 ratio. Therefore, most variables are usually accommodated to adjust the engraving force to the selected character. Can be engraved with uniform characters.

By adding another (7) pulse capacitor and thyristor, the above control ratio can be changed in any way. For example, the pulse energy can be controlled at a ratio of 1:15, and at the nominal cost of adding a thyristor and another pulse capacitor with a capacitance 8 times the minimum capacitance.

The energy supply to the electromagnets 52, 52' of the first drive is provided, according to FIG. '& can be done through a separate low-voltage mains circuit connected. Also with this device.

Electromagnets 52, 52' are bridged via diodes 73, 73'.

The switching transistor 72.7 actuates the first drive device.
Control of the switching transistor 67 which pre-energizes the switch 2' and the control of the thyristors 62, 6 and 64 which carry out the actual marking operation can be carried out using, for example, a microcomputer.
This is convenient because it can be performed using a simple device and in any time order.

In particular, the switching order described with respect to FIG. 5 may be controlled in this manner.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a drive device for a marking machine in which a first drive device is provided with two electric motors as a drive source, and a second drive device is provided with an electromagnet as a drive source. FIG. 2 shows a modification of the embodiment of FIG. 1 in which the first drive device is also provided with an electromagnet. FIG. 5 is a schematic configuration diagram showing another embodiment of the drive device in which the first drive device is provided with a motor-driven crank gear and the second drive device is provided with two electromagnets. FIG. 4 is a time table regarding motion control in the embodiment of FIG. 6. Figure 5 is the first
7 is a diagram showing a modification of the embodiment of FIG. 6 in which the drive device is also provided with an electromagnet; FIG. FIG. 6 is a timetable for energizing the electromagnet in the embodiment shown in FIG. FIG. 7 is a simplified graph showing the relationship between the type of engraved characters and the engraved pressure depending on the material of the engraved characters. FIG. 8 is a basic circuit diagram of the power source of the second drive device in the embodiment of FIGS. 6 and 5. FIG. 9 is a basic circuit diagram of the power source of the second drive device in the embodiment of FIG. 5. 1... Stamping machine, 2... Frame, 6, 6'... Starting lever, 4, 4'... Free end, 5.5'... Free end, 616'... Connection point, 7.7'...drum, 8...rotating shaft, '9.9'...engraved mold, 1
0.10'...Return spring. 11.11'...Pressure screw, 12.12'...Intermediate convex element, 13.13'...Resetting spring, 14...Marking plate, 15...° lever arm, 16. °・Torque joint, 17... Connecting body, 18... Bracket, 19
...Push rod, 20...Lever arm, 21.
...Lever arm, 22...Free end, 26.
...First drive device, 24...Second drive device, 25
... Electromagnet, 26 ... Armature, 27 ... Cam disc, 28 ... Clutch joint, 29 ... Electric motor, 60 ... Drive lever, 61 ... Free end,
62... Free end portion, 66... Armature, 64...
・Electromagnet, 35... Resetting spring, 66... Stopper, 37.37'... Electromagnet, 38.38'...
Starting member, 39.39'...Push rod. 4.0.40'...Free end, 41.41'...Return spring, 42.42'...Free end, 45.43'.
...armature. 44, 44'... Drive lever, 45, 45'... Free end, 46, 46'... Free end, 47, 47'.
...Crank gear 48.48'...Connecting rod, 49...
・Clutch joint, 50...Motor, 51.51'・
... Armature, 52.52' ... Electromagnet, 56.56
'...Return spring, 54.54'...Stopper, 55
... Rectifier diode, 56... Pulse capacitor, 57... Pulse capacitor, 58... Pulse capacitor, 59.60.61... Protection resistor,
62.63.64...Thyristor, 65.65'.
...Diode, 66...Protection diode, 67.
...Switching transistor, 68...Full wave rectifier circuit, 69...Filter capacitor, 7o...Full wave rectifier circuit, 71...Filter capacitor, 72.7
2'...Switching transistor, 73.73'...Diode, 74...Return spring.

Claims (1)

[Scope of Claims] (1) Two complementary stamping dies facing each other in a stationary position with a fixed static distance are directed toward the stamped plate held between the stamping dies by stamping pressure, In a drive device for a marking machine that presses in the direction of ,9')
Y over the stroke, in the direction of mutual relationship,
A first drive device (2 rollers) that sends the marking plate to the marking plate (14), and a marking die (9, 9') that has a short marking stroke relative to the displacement stroke and sends it to the marking plate (14).
) and a second drive device (24) for applying stamping pressure to the marking machine. (2) The second drive device (24) comprises as a drive source an electromagnet (25, 37, 37') having an armature that can move over the engraving stroke. ]) The drive device described in item 1). (3) The marking machines face each other at a certain distance,
The frame of the stamping machine is hinged, and the hinged part is located between the free ends of the stamping machine so that opposing stamping dies can be placed between the opposing Ishiro protruding ends. There are two actuating levers that apply pressure in the direction of the stamped plate at the end, and a drive device acts on the opposite free end. The ends (4,4) are hinged to each free end of the lever arm of the toggle joint (16), passing through the axis of the electromagnet (25) of the second drive (24) and passing through the armature (
26) Lever arm (1) of push rod (19) with w
5.15')Y is connected to the connection point (17), and the free end of the push rod (19) receives an axial load from the first drive device (23). A drive device according to claim (2). (4) The first drive device (23) is provided with a cam disk that acts on the push rod (19) and is driven by an electric motor (29) via a clutch coupling. The drive device described in Range No. 31. (5) The first drive device (23) has a 5-free end (filter 1) which is disposed approximately at right angles to the axial direction of the push rod (19).
is applied to the free end (22) of the push rod (19), the opposite free end (62) is hinged to the frame (2) in a stationary state, and by the force of one electromagnet (64), Claim No. 3, characterized in that a drive lever (route O) arranged so as to be able to apply a load in the axial direction is provided.
The drive device described in section. (6) The reset force of the reset spring (74) is applied to the toggle joint (1
6), and this acting force causes both activation levers (
3, 3') can be set at least at a resting position corresponding to the resting distance of the stamping die (9, 9'). Drives described in any section. (7) The resetting spring (74) is a tension spring, fixed at one end thereof to the connection of another toggle joint at the opposite end, and at one end thereof to the lever arm (21). The drive device according to claim 6, characterized in that the activation arm (15') is hinged to the opposite end, and the opposite end is hinged to the frame in a stationary state. (8) First and second electromagnets of the second drive device (67°6
7') are each provided with an actuating member (68, 68'), said actuating member being provided with an armature (43, 43')'aj that can be moved within the electromagnet, lying on a common axis, and said actuating member Between the mutually opposite free ends (42, 42') of the device, opposite stamping dies (9, 9') can be arranged in the stamping position, and an activation member at the opposite free end thereof. (Ro8.
! +8'), and the actuating members (38, 38') are able to approach each other and perform a displacement stroke by said drive device. The drive device described in range (2). (9) The first drive device is provided with two opposing drive levers (44° 44') Y arranged approximately at right angles to the common axis, the free end of said drive levers on the opposite side of the common axis; Hinged in a stationary state to the stamping machine (1), the opposite free ends thereof each engage an activation member (68° 3B,) and act in the direction of the stamping die (9, 9'). The drive device according to claim (8), characterized in that a load can be applied by a torque applied to the drive device. (11 drive levers (44, 44') are engraved (9, 9')
) to its rest position against a torque acting in the direction of
The drive device described in item 9). (Il+ The first drive device includes two crank gears (4) driven by a motor (50) via a clutch joint.
7,47”) fi, and the clutch joint is connected to a connecting rod (4
8, 48') to each hinged point located between the ends of the drive lever (44, 44'). Drive as described. Claim 0υ characterized in that the two crank gears (47, 47") have different strokes.
The drive device described in section. (1'5 Drive lever (44, 44') of the first drive device
An armature plate (51, 51') is provided between the ends of the armature, and the armature is capable of applying torque by means of electromagnets (52, 52') arranged opposite to it. The driving device according to claim 91 or t11, characterized in that
) consists of push rods (69, 69') passing through the axis. Moreover, the armature has a shape that overflows in the radial direction and expands (46°4
Claim No. 6') is fixed.
The drive device described in any item from item 8) to item (131).The armature plate constituting the (151 armature 1'43...46') is a stamped type (9, 9') and the opposite 1111 electromagnet. (37
・Disposed on the push rod (39, 39') at a constant distance from the front surface of the push rod (39, 39') at a distance approximately corresponding to the maximum stroke of the push rod (39, 39') Drive device. μ0 The free end (46, 46') of the drive lever (44, 44') which can be engaged with the push rod (69, 39')
) is on the opposite side of the stamping die (9, 9') and the armature (
46゜43''>ft The driving device according to claim 9 is supported on each front surface of the electrical and connecting plates constituting the drive device. (17) The actuating member (38, 38') is the plate to be engraved (14)
A drive device according to any one of claims (8) to u6), characterized in that it is spring biased to its rest position against a displacement force in the direction. αa Armature (43) associated with one of the electromagnets (37) of the second drive
7), and the electromagnet (67) is connected to its armature (46).
When in contact with another electromagnet (37'), the electromagnet (37) is energized by a first pulse of a predetermined time.
The armature (43') associated with the armature (43') is displaced to a position away from another electromagnet by a certain distance corresponding to the maximum marking stroke, and at said position of the armature (46') the oscillation occurs later than the first pulse. , The drive device according to claim 8, wherein the armature is energized by a second pulse that stops at the same time as the first pulse. ul The electromagnets (37, 37') of the second drive device are energized by discharge pulses of the capacitors (56, 57, 58). (20) The driving device according to claim 1, wherein the driving device according to claim 1 is characterized in that the energy during the pulse is controlled depending on the type of characters to be engraved. C! η Various capacitors (56, 57,
21. The drive device according to claim 20, wherein the pulse energy is controlled by selectively cascading 5B) in parallel. C/Hot water The microcomputer controls the pulse
A drive device according to claim 20+ or (2υ), characterized in that it controls energy.