JPS61136777A - Nail or staple driver - 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 Industrial Field of Application The invention starts from a nailing or stapling machine according to the preamble of claim 1.

2. Description of the Prior Art Nailing or stapling machines themselves are already known for a long time. However, known nailing or stapling machines are operated manually or powered from the alternating current power supply network. Manually operated machines have the disadvantage that the longer they operate, the more muscle fatigue they experience at the end of the job. Energy consumption is less of a problem in electric machines connected to a current source. This is because sufficient energy is extracted by the current source.

Problems to be Solved by the Invention The nailing or stapling machine of the present invention having the configuration described in the features of claim 1 is a problem that can be solved by relatively small patch IJ.
This has the advantage that sufficient energy is used for the suction mover of the device. Another advantage is that the two actuators are not damaged by the strong currents and ξ irradiations that occur during the attracting operation of the armature, in other words they are protected by a memory, for example a capacitor. Therefore, the nailing or stapling machine according to the invention can be constructed simply and compactly, and yet operates reliably.

An advantageous embodiment of the nailing or stapling machine according to claim 1 is possible with the features described in the embodiment section of the patent claim.

It is particularly advantageous to connect the capacitor to the battery via a resistor. This ensures that the battery current does not exceed a predetermined value even when the capacitor is completely discharged. It is likewise advantageous to arrange a further switch between the battery and the capacitor.

This prevents the battery from discharging over a long period of time due to capacitor leakage currents even when the machine is not in use. In this case, it is advantageous if this switch can be activated when the machine is lifted, preferably by means of a switch mounted in the hand grip of the machine. Similarly, it is effective to provide a resistor in parallel with the capacitor. With this configuration.

Allows the capacitor to be fully discharged when the machine is shut off. Since this resistance is high resistance,
No significant additional current is generated. The switch between the capacitor and the attracting armature coil is advantageously designed as a thyristor, a cold cathode thyratron or a transistor. In this way, there will be no spark when the switch is closed.

It is also very advantageous to provide a voltage measuring device which detects the full state of charge of the capacitor and closes the switch when a predetermined value is reached. This allows the switch to close only when the capacitor is fully charged. This makes the machine extremely reliable in operation. This is because incorrect use is avoided by a capacitor not being fully charged. This also allows one machine to be operated by a smaller battery, although the capacitor charging time is longer than usual. By varying the predetermined values, it is advantageous to be able to vary the percussion intensity of the machine over a wide range, and at the same time to achieve total battery energy savings. Therefore, the total suction force applied to the movable element can be changed depending on the desired nailing strength.

It is also advantageous to insert a voltage multiplier circuit between the battery and the capacitor. This allows the capacitor to be chosen relatively small without reducing the total stored energy. When a very high charging voltage is desired for a capacitor, for example, a converter with a blocking type inverter or a conduction controlled type inverter is selected to double the voltage, and the capacitor is fully charged by its output voltage. Effective. This makes it possible to obtain a high output voltage, which allows a high charging voltage of the capacitor, with a very small and simple construction in terms of circuit technology. In this case, the capacitors can be selected in a particularly small size. It is also effective to adjust the output voltage of the converter. As a result, even if the battery voltages are different, the same output voltage and therefore the same amount of energy can always be used. Furthermore, the output voltage is advantageously fed in whole or in part to a comparator, which activates the switching device when it exceeds a predetermined voltage, which prevents further activation of the converter. Interrupted. Advantageously, the device interrupts the voltage supply to the capacitor when the implantation process is not carried out for a predetermined time. In this case, unnecessary current consumption due to capacitor leakage currents or losses in the converter is avoided. It is particularly advantageous to provide a device which completely interrupts the current supply to the attraction armature coil as soon as a predetermined or suitable energy flows through the attraction coil of the armature. This configuration also consumes only a small amount of battery. This is because the energy consumption of the armature attraction coil can be matched to the total material to be illuminated.

If at least two capacitors are provided, it is advantageous to connect them to the attraction armature coil in each case via a partial/full selection switch. This makes it possible to extract energy from one part of the capacitor while keeping the other part of the capacitor fully ready for subsequent blows. In this case, it is advantageous to charge both of these public funds at the same time. This allows the nailing or stapling machine to be operated in succession for relatively short periods of time.

The entire supply circuit for charging the capacitor can be realized more simply if such a short continuity is not necessarily required.

According to another advantageous embodiment, the selection switch can be switched rapidly during the working process. This allows for a double strike by first fully discharging one part of the capacitor and then discharging the other part of the capacitor.

This is desired, for example, for completely driving the stable into hard wood. If more energy is required, it may be advantageous, for example, to connect instantaneously separately actuated capacitors in parallel, so that the percussion power can be increased. This basic idea can advantageously also be applied to the construction of nail and stabilizing machines with adjustable driving strength. In this case the number of capacitors used per blow.

Determines the strength of the blow. Thus, for example, any desired impact strength can be created by additionally connecting one, two or several capacitors, with only the energy required for the driving process being consumed by the nail and stabilizing device. You can do it like this.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be explained in detail with reference to the drawings, with reference to illustrative embodiments.

A known electric nailing stable gun has a casing outer shell in which a coil winding is incorporated.
In this case, the coil body of the coil winding has a through hole extending along the coil axis as a guide for the movable element attraction.

When a current pulse flows through the coil winding, the suction type mover pulls the coil into the coil at an accelerated rate. At this time, when the driver fixed to the suction-type machimoko hits the adhesive member protruding into the ejection opening, that is, a nail or staple, this member separates from the adhesive member row loaded in the magazine and the adhesive member accelerates in the direction of the protrusion. The attachment member is then driven into the workpiece located below the projection. Due to the repulsive force and the spring force acting on the driver from the attachment element, the suction armature together with the driver is returned to its starting position, so that a new working movement can be carried out.

As the energy source used is a nail or stabilizing machine, an accumulator or a patch reset, which is housed in the area of this machine. Since the current flowing through the coil is very large, the accumulator set must likewise be chosen very large so that it can provide the necessary energy for short time intervals of current flow. However, this results in a machine that is too bulky to be suitable for use as a mobile phone.

FIG. 1 shows the means for providing the required energy for the coil. A resistor 2 is connected to one pole of the accumulator or battery 1, to which two capacitors 3 and a capacitor are connected downstream. These capacitors 3 and 4 are connected to the other electrode of the battery 1. Furthermore, there is a conductor coming out from resistor 2 to switch 5,
The switch is also connected to the mover attraction coil 6.

The movable element attraction coil 6 is connected on the other hand to the other electrode of the battery 1.

Now, via the charging resistor 2, the capacitor battery with capacitors 3 and 4 is charged from the battery 1 and a corresponding energy is stored in the capacitor 3 and in the capacitor.

Now, when switch 5 closes r2, the capacitor battery with capacitors 3 and 4t is discharged via coil 6. After the charging period the switch is opened again by the operator, so that the capacitor 3 and the cow are charged again. The resistor 2 is essentially used to limit the charging current in the capacitor 3 and the capacitor 3 after the sticking or implanting process. This is because the charging current can be very high in the initial phase. At the same time, the charging resistance
The input process has already been completed, but the operator presses switch 5.
It also limits the current during the time that it is kept closed. This prevents rapid discharge of the accumulator and release of unused energy from the accumulator set. The number of capacitors 3 and capacitors and their capacitance values are determined depending on the current consumption of the coil 6. capacitor patch 'J
U, generates a current pulse of satisfactory strength.

In addition, a sufficient current must be sent to ensure forward movement of the suction type movable element with a predetermined acceleration.

This is because the buffering effect of the capacitors 3 and 4 gold allows the storage battery 1 to be kept relatively small, and its Arus is very high. The capacitor then prevents the voltage from dissipating based on the battery's internal resistance. Furthermore, the charging resistor prevents the extraction of unused current.

This is because the switch 5 is usually closed for a significantly longer period of time than is necessary even for the driving process. .

Others flow continuously. Losses that may occur due to capacitor 3 and leakage currents are counteracted by the circuit arrangement of FIG. A charging resistor 2 is also connected to one electrode of the battery 1 in this case. A switch 8 is connected downstream of this resistor. Starting from this switch 8, the capacitor 3 and the capacitor 3 and also the resistor 7 are connected in a parallel circuit. The resistor is further connected to the other electrode of the battery 1. The switch 8 is connected to the other switch 5. The other terminal of switch 5 is again connected to the mover attraction coil.

The coil is further connected to the other electrode of the battery 1.

Additional switch 8 prevents leakage currents from flowing through capacitors 3 and 4 in the rest state of the nail or stapler. This switch is advantageously actuated when the operator grasps the nail or the grip of the stapler with his hand. The switch is therefore preferably accommodated in the grip area of the device. Capacitors 3 and 4 can then be charged via charging resistor 2. When the switch 5 is actuated, the driving process begins in a known manner.

It is advantageous to prevent switch 5 from being actuated by suitable means when switch 8 is not actuated or is only actuated for a short period of time. With this preventive measure, when the operator attempts to trigger the suction type movable element with the working movement metal switch 5, the capacitor 3
And winter is guaranteed to be recharged. This is achieved by allowing the pawl to move freely over the switch 5 only when the switch 8 is fully pressed. If the switch 8 is already closed relatively early in this case, it is possible by this measure to ensure that the capacitor 3 and the cap are already charged when the switch 5 can be fully actuated. Furthermore, resistor 7 is used to discharge capacitors 3 and 4 in the rest state of one machine. This makes it possible to create output conditions that are defined in each case during operation.

Does leakage current flow continuously in the circuit device described above? Either you have to be patient or you have to use two switches. FIG. 3 shows an embodiment in which the entire implantation process can only be started if the capacitor is charged.

A switch 15 is connected to one electrode of the battery 1 . The switches are connected on the other hand to one terminal of resistor 9 and resistor 14, respectively. A potentiometer 10 is provided in the line emerging from the resistor 9, which potentiometer is connected on the other hand to the other electrode terminal of the battery 1. A capacitor 3 and a capacitor are connected in parallel to the resistor 7. At the same time, the midpoint between resistors 14 and 7 is connected to one terminal of comparator 11. The other terminal of comparator 11 is connected to the connection point of resistors 9 and 10. A thyristor is connected to the resistor 14. The other terminal of this thyristor 13 is connected to one terminal of the movable element attraction coil 6. The other terminal of the movable element attraction coil 6 is also led to the S-tube 1 in this case.

On the output side of the converter 11 , it is connected to an ignition device 12 which is conventionally constructed and which is connected to the ignition control terminal of the thyristor 130 .

The operation of the circuit arrangement according to FIG. 3 substantially corresponds to the operation of the circuit arrangement according to FIG. After the switch 15 is closed, the resistor 141c
The capacitor 3 and the cow are charged via the capacitor 3. However, the operation of switch 15 is omitted. In other words, if capacitor 3 is fully charged, this means that capacitor 3 and capacitor 5 are fully charged.
is detected by the regulator 11 and the controller triggers the ignition circuit 12. This turns on the thyristor 13, so that the implantation process can begin. The switch 15 is designed in the same way as the switch 5.

Furthermore, the impact strength can be adjusted using the buttons 7 and the yometer 10. By means of the value of the potentiometer 10, it is possible to knot the response threshold of the connominator 11, so that the implantation process takes place with different states of charge of the capacitors 3 and 1. But the hitting strength.

It is proportional to the state of charge of capacitor 3 and the cow.

The charging status of capacitor 3 and cow is shown on potentiometer 1
When the threshold is reached, which is set by 0,
Ignition takes place.

A high resistance resistor 7Vi ensures that the capacitor battery with capacitors 3 and 4 is discharged in the rest state. In order to increase the energy stored in the capacitor 3 and the energy stored in the capacitor 3, it is effective to insert and connect a voltage multiplier circuit at the front stage, depending on the case. Since the energy stored in the capacitor 3 and in the capacitor 3 has a square relation to the capacitor voltage, it is thereby possible to supply several times more energy to the zero electromagnet system.

In general, switches 5, 8 and 15 can also be replaced by thyristors, cold cathode thyratrons, transistors or other semiconductor circuits. In this way, sparks that may occur can be easily and reliably avoided.

FIG. 4 shows a circuit arrangement in which the idea of voltage multiplication is realized using a converter with a blocking type inverter or a conduction-controlled inverter. To battery 1, q
A converter 21 having a blocking type inverter or a conduction controlled type inverter capable of converting a high voltage into a high voltage is connected. The output voltage of the converter 21 can be selected arbitrarily within a wide range and such that, for example, as coil 6 a coil such as that which is customary in commercially available, mains-connected nailing machines can be used. I can do it.

However, it is also possible to adjust the setting to a higher or lower voltage. Connected to the output terminal of the converter 21 is also a capacitor 4 which is charged by the output voltage. Capacitor 4 is connected to movable element attraction coil 6 via switch 5fc. The switch 5 is configured as a cold cathode silado domino whose control electrode is connected to the ignition circuit 20 . Cold-cathode thyratrons are generally known per se and, along with thyrisks or transistors, have excellent suitability as electrical switches.

A potentiometer 10 is connected in parallel to the capacitor 4, with which a portion of the capacitor voltage or the output voltage of a converter 21 with a blocking inverter can be detected. The output signal of the potentiometer 10 is supplied to a controller 11. The output of the comparator is fed via a diode 24 to the input of a converter 21 with a blocking inverter.

Furthermore, a timing element 22 is provided, which is connected to the battery 1 and at the same time via a diode (23') to another input of the converter with a Plockknob inverter.

The other input side of the converter 21 with a blocking inverter is led to a transistor switch which makes it possible to switch off the function of the converter with a blocking inverter. This configuration makes it possible to omit a manual shutoff process at the battery switch. When the charging voltage is reached, using the comparator 11,
Transducer 21 becomes disconnected, so that it no longer vibrates on its own.

The current draw from the battery is then cut off. A similar effect can be achieved by the timing element 22 if the ignition switch 2o is not actuated within a predetermined time and current is therefore drawn from the battery 1 to fully charge the capacitor. Ru. After a predetermined time, the timing element 22 is connected via a diode 23 to a converter 21 which also has a blocking impertor.
to prevent further current consumption. Diodes 23 and 24 are simply
It is used to decouple the switching outputs of the comparator 11 and the timing element 22. A new start of the transducer 21 is effected by a switch located in the battery current circuit or by a press tween connected to the ignition circuit which allows the transducer to start oscillating with a short press. It will be done.

It is particularly advantageous if a voltage substantially corresponding to the peak value of the supply voltage is tapped off at the output of the converter 21 with a blocking inverter. As a result, a coil used in a power distribution line connected type nailing machine can be used as the coil 6. The energy supplied to the coil 6 can be determined, for example by measuring the current consumption of the coil 6 or by using a material selection switch, so that relatively little energy is required for a given driving process. The setting can be adjusted by temporarily switching off the switch 5 as well as by selecting the voltage at the capacitor voltage.

FIG. 5 also shows the battery 1 connected to the voltage converter 21. This voltage converter can be constructed, for example, as a converter with a blocking inverter tW, as in the circuit described above. One output of the converter with a blocking inverter is connected to ground and a further selection switch 31 is connected to the other output. One connection terminal of the selection switch 31 is connected to the capacitor 3, and the other output side of this selection switch is connected to the capacitor 3. This selection switch 3
1 is to connect the switch 5 to the capacitor 3 or to the capacitor cow? enable. A further connection terminal of the switch 5 is connected to a suction armature of a nail or stapling machine. A switching device 32 makes it possible to interconnect capacitors 3 and 4 in a parallel circuit.

Selection switches 31 and 30 are advantageously mechanically interconnected, so that when switch 32 is open, one capacitor 3 is connected to switch 5, while the other capacitor 4 is connected again. It will be charged. The nail or stapler is thus ready for operation, so that the entire striking process can be carried out.

Meanwhile, the other capacitor is charged. If more power is required, switch 32 is closed, resulting in two capacitors being connected in parallel. As a result, this circuit device has the following features. In other words, it is assumed that a large amount of impact energy is not required during adjustment.

Relatively short reconditioning times may result or the construction of the voltage converter may be relatively simple.

If the fixed mechanical connection between switches 3o and 31, which has been assumed so far, is released.

By suitable control, it is possible to quickly switch the selection switch 30 and press the switch 5 at the same time to effect a double blow. Double blows are required, for example, to completely drive a staple into hard wood. Such measures cannot otherwise be realized, since voltage converters are usually not able to quickly and satisfactorily supply all the energy required to charge a single capacitor.

By varying the voltage or by additionally connecting at least one capacitor, the impact strength can be made variable over a wide range. Thus, for example, instead of capacitor 3 and the capacitor, it is also conceivable to use further capacitors which can be switched in parallel to each other via switching device 32. Depending on the desired impact strength, from 1 to n capacitors can all be connected in parallel, while the capacitors that are not needed are charged or kept charged.

In this case, the impact strength can be selected arbitrarily over a wide range using a simple switching device sound.

Effects of the Invention The nailing or stapling machine of the present invention supplies energy to the mover attraction coil of the nailing or stapling machine by the battery through the capacitor, so that sufficient energy can be used and the battery can generate a strong current. It has the advantage of not being damaged by pulses, can be easily and compactly constructed, and has the advantage of reliable operation.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a first embodiment of the nail or stapler of the present invention, FIG. 2 is a circuit diagram of a second embodiment, and FIG. 5 is a circuit diagram of a third embodiment. 4 is a schematic circuit diagram of the fourth embodiment, and FIG. 5 is a schematic circuit diagram of the fifth embodiment. 1...Battery or storage battery, 30.31...Selection switch, 6...Movable suction coil, 10...Poten/Yometer, 11...Continuor/Zoreta, 12゜20
...Ignition circuit, 13...Thyristor, 21...Voltage converter

Claims (1)

Claims: 1. In a battery operated nailing or stapling machine having a mover attraction coil for the nailing or stapling device, the battery (1) charges at least one capacitor (3, 4); The capacitor is connected to the switch (5
) A nailing or stapling machine, characterized in that it is connectable to a movable suction coil (6) via a movable suction coil (6). 2. Nailing or stapling machine according to claim 1, wherein the capacitors (3, 4) are connected to the battery (1) via a resistor (2). 3. Between the battery (1) and the capacitor (3, 4),
3. Nailing or stapling machine according to claim 1, wherein a further switch (6) is inserted. 4. Nailing or stapling machine according to claim 3, wherein the further switch (8) is switchable when lifting the machine. 5. Nailing or stapling machine according to any one of claims 1 to 4, characterized in that a resistor (7) is connected in parallel to the capacitors (3, 4). 6. Nailing or stapling machine according to one of the claims 1 to 5, characterized in that the switch (5) is designed as a thyristor, a cold cathode thyratron or a semiconductor switch (13). 7. A voltage measuring device (11) is provided, which device detects the state of charge of the capacitors (3, 4) and closes the switch (5) when a predetermined value is reached. A nail or stapler according to any one of claims 1 to 6. 8. Nailing or stapling machine according to claim 7, wherein the predetermined values are variable. 9. The nailing or stapling machine according to any one of claims 1 to 8, wherein a voltage doubler circuit is provided between the battery (1) and the capacitors (3, 4). . 10. Nailing or stapling machine according to any one of claims 1 to 9, characterized in that it is provided with a circuit arrangement for monitoring the battery voltage. 11. A converter (21) having a blocking type inverter or a conduction control type inverter is connected downstream of the battery (1), and the output voltage of the converter is connected to a capacitor (
4) A nailing or stapling machine according to any one of claims 1 to 10, which charges the nailing or stapling machine. 12. Nailing or stapling machine according to claim 11, wherein the output voltage of the converter (21) is adapted to be regulated. 13. The output signal of the converter (21) is tapped and fed to a comparator (11), which uses a switching device to switch the converter (21) when a predetermined voltage is reached. A nailing or stapling machine according to claim 12. 14. According to any one of claims 1 to 13, in which the voltage supply to the capacitor (4) is interrupted if the intermittent driving process is not carried out for a predetermined period of time. nail or stapler. 15. The current supply to the armature attraction coil (6) is interrupted after a predetermined and/or measured energy consumption. Nailing or stapling machine as described in Section 2. 16. At least two capacitors (3, 4) are provided, of which in each case a part can be connected to the armature attraction coil (6) via a selection switch (30). A nail or stapler according to any one of the ranges 1 to 15. 17. Nail or staple according to claim 16, wherein the respective different parts of the capacitors (3, 4) can be connected to the power supply (1, 21) via further selection switches (31). Beating machine. 16. Nailing or stapling machine according to claim 16 or 17, wherein the selection switch (31) is switchable during the working process. 19. Nailing or stapling machine according to any one of claims 1 to 18, wherein the capacitors (3, 4) can be connected in parallel. 20. Nailing or stapling machine according to any one of claims 1 to 19, wherein the number of capacitors used per impact determines the impact strength.