KR20030035944A - Crimping tool - Google Patents

Abstract

PURPOSE: A compressing tool is provided to display information related with a compressing operation as the maximum pressure and the number of the compressing operations as quantity information and accordingly to easily decide if the compressing operation is normally executed and needs to be repaired. CONSTITUTION: A compressing tool is composed of a compressing operation information-detecting unit for detecting information concerning a compressing operation; a display unit for displaying quantity information; a display control unit for allowing the display unit to display the quantity information in accordance with the information detected by the compressing operation information-detecting unit; and a pressure deciding unit for deciding whether pressure is normal or abnormal according to information detected by the compressing operation information detecting-unit. The compressing operation detecting-unit includes a pressure sensor(11) for detecting pressure of the compressing tool and the display control unit displays a maximum pressure value detected in one compressing operation by the pressure sensor on the display unit.

Description

Crimping Tool {CRIMPING TOOL}

The present invention relates to a crimping tool used for crimping a crimp terminal.

In the work for crimping the crimp terminal, a crimping tool operated manually or by electricity is often used. In addition, such a crimping tool is used to apply pressure directly through the hydraulic pressure as well as directly press the crimp terminal using a gear mechanism or a link mechanism.

Now, a structural example of the electrically operated hydraulic crimping tool will be described below with reference to FIG. This electrically actuated hydraulic crimping tool is of the type that applies pressure to the crimping terminal set on the tool head portion 3 using a piston 2 which can be moved forward from the body 1. Specifically, the direct current motor disposed inside the main body is thereby rotated to drive the hydraulic pump through the planetary gear reduction mechanism, and the hydraulic pump transfers the oil in the oil tank to the hydraulic cylinder, and thus the piston 2 Can be moved forward from the body 1.

In the present electrically operated hydraulic crimping tool, when the handle portion 4 is gripped by the hand and the trigger switch 5 is pressed by a finger, the drive current is supplied from the battery pack 6 to the direct current motor, thereby The piston 2 is moved forward from the body 1. In addition, when the hydraulic pressure release button 7 is pressed with a finger, the oil in the hydraulic cylinder is supplied toward the oil tank, and thus the piston 2 is pulled back by the spring.

By the way, in the above-mentioned conventional electrically operated hydraulic crimping tool, a normal crimping operation cannot be performed unless the piston 2 presses the crimping terminal with a hydraulic pressure of a given value or more. However, for example, due to the end of the life of the hydraulic circuit of the hydraulic pump, a sufficient value of hydraulic pressure cannot be output, and thus the crimp terminal is crimped even when the piston 2 presses the crimp terminal with a pressure smaller than the given value. When observed after completion of the work, the pressure of the piston 2 is small, and thus it is difficult to judge that a normal crimping work could not be carried out. That is, in the conventional electrically operated hydraulic crimping tool, it is impossible to accurately know whether a sufficient value of pressure has been obtained in the crimping operation. Because of this, there is no way to confirm the occurrence of such insufficient compression when the pressure is so low that insufficient compression occurs in the compression operation.

In addition, the above-mentioned problems are similarly found in the above-mentioned electrically operated hydraulic crimping tool as well as in the crimping tool which can be operated by manual or other kind of driving force. That is, the problems are not limited to hydraulic crimping tools.

The present invention aims to eliminate the disadvantages found in conventional compacting tools.

It is therefore an object of the present invention to provide a crimping tool that can display the number of times of execution of a given pressure or crimping operations in a crimping operation, thereby easily determining whether any insufficient crimping occurs in the crimping operation. It is also possible to determine whether the pressure applied to the crimping operation was normal, thereby making it possible to confirm the occurrence of coarse crimping in the crimping operation.

In realizing the above object, according to the present invention, it is possible to determine whether the pressure is normal or abnormal according to the information of the crimping operation information detecting unit for detecting information on the crimping operation and the information detected by the crimping operation information detecting unit. A crimping tool is provided having a pressure judging unit for judging and a notification unit for reporting a judging result. The operator using this crimping tool can easily know whether the crimping work has been performed normally. In addition, the operator can immediately stop the crimping operation and take appropriate measures.

Further, in realizing the above object, according to the present invention, a crimping job information detecting unit for detecting information on a crimping job, a display unit for displaying quantity information, and information detected by the crimping job information detecting unit Is provided with a crimping tool having a display control unit for causing the display unit to display quantity information. The operator using the crimping tool can easily determine whether or not the crimping work is normally performed by referring to the quantity information display, as well as whether or not maintenance of the crimping tool is necessary.

By the way, the crimping tool according to the present invention may be a crimping tool which can obtain the pressure manually without being limited to the crimping tool which can obtain the pressure from the driving force of the electric motor. Further, in the crimping tool according to the present invention, hydraulic pressure may or may not be used to obtain the pressure.

In realizing the above object, according to the present invention, it is possible to determine whether the pressure is normal or abnormal according to the information of the crimping operation information detecting unit for detecting information on the crimping operation and the information detected by the crimping operation information detecting unit. A crimping tool is provided having a pressure judging unit for judging and a notification unit for reporting a judging result. The operator using this crimping tool can easily know whether the crimping work has been performed normally. In addition, the operator can immediately stop the crimping operation and take appropriate measures.

By the way, the crimping tool according to the present invention may be a crimping tool that can obtain pressure manually without being limited to the crimping tool that can obtain pressure from the driving force of the electric motor. Further, in the crimping tool according to the present invention, hydraulic pressure may or may not be used to obtain the pressure.

In the crimping tool according to the present invention, as the crimping work information detecting unit, a work detector for detecting the execution of the crimping work or a pressure sensor for detecting the pressure can be used.

In addition, in an electrically operated crimping tool that generates pressure by driving an electric motor, a current detector for detecting the drive current of the electric motor used when performing the crimping operation may also be used, although a pressure sensor may be used. DC motors provide a near linear relationship between the drive current and its output torque, and in addition to most other types of motors, the drive current and its output torque are correlated. Therefore, in the case where the maximum value of the drive current is known, the maximum pressure applied to the crimping operation can be obtained by analogy, and it can be judged whether or not the crimping operation is normally executed using the pressure judging unit. In addition, the need for disposing a pressure sensor in the hydraulic cylinder when a current detector is used is eliminated, and therefore, by simply modifying the electric circuit, the present invention can be easily executed.

By the way, the electrically operated crimping tool according to the present invention is not limited to a tool for directly applying pressure to a crimping terminal using a driving force of an electric motor, and it is also a tool for applying pressure to the crimping terminal through hydraulic pressure using a driving force of an electric motor. It may be.

However, an electrically operated hydraulic crimping tool using an electric motor for driving a hydraulic cylinder among the electrically crimping tools thereby generates pressure applied to the crimping operation, which is not only simple in structure but also various units according to the present invention. Even when combined, it may be manufactured compactly. In other words, such an electrically operated hydraulic crimping tool may be preferably used.

Also preferably as a motor, a direct current motor may be used. The reason for this is as follows. That is, since the DC motor has a nearly linear relationship between the drive current and its output torque, the circuits are easy to design, so that the DC motor is easy to control, and the battery can also be used as a power source of the DC motor. It not only allows the operator to carry the crimping tool but also to use the crimping tool regardless of the operating position.

Such a crimping job information detecting unit may be used independently or in combination, for example, the pressure sensor and the job detector may be combined together or the current detector and the job detector may be combined together.

In the case where the pressure sensor is used as the pressing operation information detecting member, the display control unit may be configured so that the maximum pressure value detected by the present pressure sensor during one pressing operation is displayed. In the case where the current detector is used as the crimping operation information detecting member, the display control unit may be configured so that the maximum current value detected by the present current detector during one crimping operation can be displayed. Further, when the job detector is used as the crimping job information detecting member, the display control unit may be configured to not only count the number of executions of the crimping jobs detected by the present detector but also display the count result.

The display unit used to display the quantity information displays the numerical value or quantity through a display state including three or more conditions.

The display of the figures is carried out by displaying single digits or more, for example, in accordance with a decimal display system, which has the advantage that the hydraulic pressure value and the number of runs of operations can be clearly shown to the operator. Have As the display mechanism for displaying the numbers according to the decimal display system in this manner, for example, a liquid crystal display apparatus or LED (light emitting diode) display apparatus using a 7-segment display or a dot matrix display can be used.

The display of quantities is effected by displaying quantities of numerical information via a graph representation, which has the advantage that the pressure value of the hydraulic pressure and the number of times of operations can be shown to the operator in an intuitively easy way. . For example, when numerical values such as hydraulic pressure values are displayed, the operator must have knowledge of the range of normal pressure values. However, in the case where the pressure values are displayed by the quantity display system, the operator can determine by intuition from the appropriate indices whether the pressure values are normal or not. A display mechanism for displaying quantities via a graph representation, for example, quantities in bar graphs or pie graphs using a 7-segment display or dot matrix display by enlarging or reducing the continuous emission or transmission range of each other. LED display mechanisms or liquid crystal display mechanisms for displaying them can be used. In addition, the bar graphs or pie graphs can be displayed stageless in an analog manner, for example by rotating the cylinder or disk by an appropriate angle. Furthermore, instead of enlarging or decreasing the above ranges, quantities may also be displayed through changing the contrast or colors.

The display unit for displaying the quantities includes a printer which prints the quantities on paper and thereby records them.

In the case where the pressure sensor is used as the pressing operation information detecting unit, the pressure applied to the pressing operation information is detected by the pressure sensor, and the maximum value of the pressure is displayed by the display unit. This allows the operator to easily determine whether sufficient pressure is applied by the crimping operation.

In the case where the current detector is used as the crimping operation information detecting unit, the driving current of the DC motor in the crimping operation is detected by the current detector, and the maximum value of the driving current is displayed by the display unit. Since the DC motor has a nearly linear relationship between the drive current and its output torque, the maximum hydraulic pressure applied to the crimping operation can be found when the maximum value of the drive current is known, which indicates whether the crimp is carried out at a sufficient pressure. Make it easy to judge. In addition, the present invention can be carried out simply by modifying the electrical circuit since the need to have a sensor inside the hydraulic cylinder is eliminated. By the way, the display control unit may also be configured such that the display unit displays the maximum value of the drive current in the form of a numerical value in which it is hydraulically converted instead of allowing the maximum value of the drive current to be actually displayed.

In the case where the job detector is used as the crimping job information detecting unit, execution of individual crimping jobs is detected, and count results of the number of detections are displayed by the display unit. Thanks to this, it is possible for the operator to check whether insufficient conditions may occur during the crimping operation due to the life of the crimping tool itself or the life of the head of the tool, which also requires that the crimping tool itself or the parts of the tool be replaced. It allows the worker to know whether or not.

Further, according to the present invention, a crimping operation information detecting unit for detecting information on the crimping operation, a pressure determining unit for determining whether the pressure is normal or abnormal according to the information detected by the crimping operation information detecting unit; A crimping tool having a notification unit for notifying the judgment result is provided. According to the present invention, the user using the crimping tool can easily know whether the crimping operation is normally performed. Furthermore, if it is found that the crimping operation has been performed abnormally, the user stops operation immediately and takes appropriate measures.

Furthermore, the crimping tool of the present invention includes not only the above-mentioned crimping work information detecting unit, pressure determining unit, and notification unit but also a display unit for displaying the quantity information, and a display control unit for causing the display unit to display the quantity information. Therefore, the user using this crimping tool can easily determine whether or not the crimping work is normally executed by referring to the displayed quantity information.

And, these pressing job information detecting units may be used independently or may be used in combination, for example, the pressure sensor and the job detector may be combined together, or the current detector and the job detector may be combined together.

In addition, according to the crimping tool of the present invention, the pressure sensor may also be used in combination with a current detector. In the case where a pressure sensor and a current detector are used in combination, the detected value by the pressure sensor can be compared with the value detected by the current detector, and the detected values can be corrected, which determines the pressure more accurately. Makes it possible to do

However, according to the present invention, the crimping tool is not limited to an electrically operated tool whose pressure can be obtained through the driving force of the electric motor. For example, the crimping tool may also be a tool of the type whose pressure can be obtained manually. In addition, the pressure can be obtained via or without hydraulic pressure.

As a crimping work information detecting unit for detecting information on the pressure applied to the crimping work, a pressure sensor for detecting the pressure in the crimping work can be used, and in the case of an electrically operated crimping tool, detecting the drive current of the electric motor. Current detectors can be used.

Further, the pressure judging unit is a unit for judging whether the pressure is normal or abnormal according to the pressure value detected by the pressure sensor or the drive current value detected by the current detector. For example, the pressure judging unit may be composed of a comparison circuit capable of setting a given current value or a given voltage value serving as a standard for judgment, and a recording circuit for recording a normal or abnormal state of pressure.

Furthermore, the notification unit is a unit for notifying the user who uses the crimping tool of the judgment results through light or sounds. For example, the LED may turn on or the buzzer may sound when the pressure turns out to be abnormal. For this reason, the user using this crimping tool can immediately know whether the crimping operation is good. By the way, the notification unit only needs to notify at least one of the normal and abnormal determination results.

According to the crimping tool of the present invention, since the pressure detected by the crimping work information detecting unit is judged by the pressure judging unit, it is possible to know whether or not the crimping work has been normally executed. Such determination results can be immediately notified to the user using the crimping tool, and at the same time, in the case of an electrically operated hydraulic crimping tool, a unit may be arranged to cut off the current and the hydraulic system when the crimping operation is found to be abnormal. As a result, the operation may be forced to stop immediately. In addition, the result of the determination of the pressure may be left as a record, or in the case where a unit for transferring the record to the management unit is arranged, it is thereby possible to add such a recording function to the crimping tool. Thanks to this, parts of the crimping tool, which have the possibility of insufficient crimping, can be collected before the crimping tool is delivered.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the crimping tool according to the present invention will now be described with reference to the accompanying drawings.

1 shows an embodiment of a crimping tool according to the invention, in particular a block diagram of a circuit for detecting the hydraulic pressure of a hydraulic cylinder and displaying the detected hydraulic pressure on a light emitting diode display mechanism.

Fig. 2 shows an embodiment of a crimping tool according to the present invention, in detail a plan view of an electrically actuated hydraulic crimping tool showing a light emitting diode display mechanism disposed in its body.

Fig. 3 shows an embodiment of the crimping tool according to the present invention, in detail a block diagram of a circuit for detecting the drive current of a direct current motor and displaying the detected drive current on a light emitting diode display mechanism.

Figure 4 shows an embodiment of a crimping tool according to the present invention, in detail a block diagram of a circuit using a light emitting diode display mechanism capable of displaying bar graphs.

Fig. 5 shows an embodiment of a crimping tool according to the present invention, in detail a block diagram of a circuit that counts the number of times of crimping operations and displays the count results on a light emitting diode display mechanism.

Figure 6 shows an embodiment of the crimping tool according to the present invention, in detail a block diagram of a circuit in which the LED is turned on when the hydraulic pressure of the hydraulic cylinder rises to a sufficiently high value in the crimping operation.

Figure 7 shows an embodiment of the crimping tool according to the present invention, in detail a block diagram of a circuit in which a buzzer makes a sound when the drive current of a DC motor rises to a sufficiently high value.

8 shows an embodiment of the crimping tool according to the present invention, in detail, when the hydraulic pressure of the hydraulic cylinder rises to a sufficiently high value in the crimping operation, the LED is turned on, and also the maximum value of the current hydraulic pressure is displayed. Block diagram of the circuit.

9 is a side view of the entire structure of a conventional electrically operated hydraulic crimping tool.

<Explanation of symbols for the main parts of the drawings>

1: main body

2: piston

8: LED display fixture

9: display button body

10: hydraulic cylinder

11: pressure sensor

12: peak hold circuit

13: display driver

17: crimp operation detector

18: count circuit

1 to 5 show one embodiment of a crimping tool according to the invention. Specifically, Figure 1 is a block diagram of a circuit that detects the hydraulic pressure of the hydraulic cylinder and displays the detected hydraulic pressure on the LED display mechanism, and Figure 2 is an electrically operated hydraulic crimp showing the LED display mechanism disposed on its body. 3 is a plan view of the tool, FIG. 3 is a block diagram of a circuit that detects the drive current of a DC motor and displays the detected drive current on the LED display mechanism, and FIG. 4 uses an LED display mechanism capable of displaying bar graphs. 5 is a block diagram of a circuit that counts the number of times of crimping operations are executed and displays the count results on the LED display mechanism.

6 to 8 show the above embodiment of the crimping tool according to the present invention. In detail, FIG. 6 is a block of the circuit in which the LED is turned on when the hydraulic pressure of the hydraulic cylinder rises to a sufficiently high value in the crimping operation. 7 is a block diagram of a circuit in which a buzzer makes a sound when the drive current of a DC motor rises to a sufficiently high value, and FIG. 8 shows an LED when the hydraulic pressure of the hydraulic cylinder rises to a sufficiently high value in a crimping operation. Is a block diagram of the circuit that turns on, and also displays the maximum value of the current hydraulic pressure.

By the way, in this embodiment, the component parts having functions similar to those of the conventional crimping tool shown in Fig. 9 are given the same reference numerals.

In this embodiment, an electrically operated hydraulic crimping tool similar to the conventional crimping tool shown in Fig. 9 will be described below. In the electrically operated crimping tool according to the present embodiment, as shown in Fig. 2, an LED display mechanism 8 and a display button 9 are arranged on the upper surface of the main body. The LED display mechanism 8 is a display mechanism that displays six digits through the seven-segment display of the LEDs. The display button 9 is a switch for switching the display on / off by the LED display mechanism 8.

In addition, in the present electrically operated hydraulic crimping tool, the pressure sensor 11 is mounted on a hydraulic cylinder 10 disposed inside the main body 1, as shown in FIG. The pressure sensor 11 is a sensor which detects the oil pressure inside the hydraulic cylinder 10 during pressurization to the piston 2. The pressure value of the hydraulic pressure detected by the pressure sensor 11 is transmitted to the peak hold circuit 12. The peak hold circuit 12 is a circuit for holding the maximum value of the oil pressure detected by the pressure sensor 11, and during the crimping operation at the end of the crimping operation by resetting the value held at the start of the crimping operation. It is possible to continue outputting the maximum value of the oil pressure obtained in. The maximum value of the hydraulic pressure output by the peak hold circuit 12 is transmitted to the display driver 13. This display driver 13 is a circuit which causes the LED display mechanism 8 to display the maximum value of the hydraulic pressure output by the peak hold circuit 12 in the form of numbers according to the decimal display system.

The detection value output by the pressure sensor 11 is an analog signal normally composed of voltage values. And, the peak hold circuit 12 using the operational amplifier and the capacitor can be configured as an analog circuit that outputs the maximum value of the voltage value. In addition, the display driver 13 can control 7-segment displays of the number of respective numbers of the LED display device 8 and quantify the current maximum, thereby displaying them as numbers according to the decimal display system. can do.

However, according to the present embodiment, the peak hold circuit 12 and the display driver 13 each consist of a microcomputer mounted on the back side of the substrate on which the LED display mechanism 8 is disposed. Therefore, the detected value of the hydraulic pressure output by the pressure sensor is input to the analog input terminal of this microcomputer, where it is A-D converted and thereby processed into a digital signal. The peak hold circuit and the display driver 13 are each composed of a program of a microcomputer. That is, in the case of the peak hold circuit 12, at the start of the crimping operation, the initial value of the hydraulic pressure is set to a given rewritable storage area, and at each sampling, the detection of the hydraulic pressure input from the pressure sensor 11 is performed. The value is compared with the initial value set for the given storage area, and only when the detected value is larger than the initial value, the initial value is replaced by the current detected value, and while such replacement processes are repeated, thereby completing the present crimping operation. The maximum value of the hydraulic pressure obtained during this crimping operation can be maintained. In the display driver 13, for example, in the case of dynamic display, in each display scan, the value set in a given storage area is read out, converted into data for 7-segment display, and on / off signals are displayed on the LED display. The respective segments of the respective numbers of the instrument 8 are sequentially output, whereby the numbers according to the decimal display system can be displayed.

According to the electrically actuated hydraulic crimping tool of the above configuration, when the operator pushes down the display button 9 to turn on the LED display mechanism 8, the maximum value of the hydraulic pressure in the crimping work is completed each time the crimping work is completed. Can be displayed by the LED display mechanism 8. Therefore, by checking whether the current maximum value exceeds a given value and accordingly whether the hydraulic pressure is sufficient for the crimping, the operator can determine whether the crimping work is normally executed.

By the way, in the above-mentioned embodiment, the structure using the pressure sensor 11 arrange | positioned inside the hydraulic cylinder 10 in the case of a crimping | compression-working information detection unit was demonstrated. However, this may, for example, if the pressure of the piston 2 can be detected, the pressure sensor 11 may also be arranged at any position on the hydraulic circuit, or the pressure sensor 11 may be the pressure of the piston 2. It does not limit that may be arranged in a position that can be detected directly.

In addition, as shown in Fig. 3, the drive current of the DC motor 14 disposed inside the main body 1 may be detected by the current detector 15, and the present detection value is determined by the pressure sensor 11. It may be used instead of the detection value. Since the direct current motor 14 provides a nearly linear relationship between the drive current and its output torque, by detecting the drive current, the output torque of the direct current motor l4, that is, the hydraulic pump 10 is applied to the hydraulic cylinder 10. It is possible to know the hydraulic pressure. In the case of the structure shown in Fig. 3, the maximum value of the drive current is maintained by the peak hold circuit 12 and displayed on the LED display mechanism 8 through the display driver. In this case, the numerical value representing the maximum value of the drive current can also be displayed after being converted to the numerical value representing the maximum value of the hydraulic pressure. In the case where the current detector 15 is used in this manner, it is possible to eliminate the need for the use of the expensive and intractable pressure sensor 11 as well as to provide the pressure sensor 11 inside the hydraulic cylinder 10. The need for time and effort to seal and secure may be avoided. That is, by simply modifying the electric circuit, the present invention can be implemented at low cost.

Also in the above embodiment, the LED display mechanism 8 for displaying numerical values has been described. However, as shown in Figure 4, an LED display mechanism 16 that displays quantities may also be used. In this LED display device 16, 12 narrow and long LED display segments are arranged in a row, and as the displayed value increases, these 12 display segments are sequentially turned on in the order starting from the left shown in FIG. That is, the number of display segments that are turned on or emitting is increased in this order, thereby displaying the values in a bar graph manner. The use of such LED display mechanism 16 can provide the following advantages. That is, even when the actual value of the hydraulic pressure or the drive current required for the crimping operation is unknown, any of the three display segments that are turned on exceeds 9 but the remaining three display segments are placed at the right end in Fig. 4, and the emission colors are different. In the case of not turning on, the operator can understand by intuition that a sufficient value of hydraulic pressure has not been obtained. That is, it is possible to obtain an advantage that an operator can easily determine whether the crimping work is normally performed. As the LED display mechanism 16 for displaying quantities, not only an LED display mechanism for displaying quantities in such a bar graph manner illustrated in FIG. 4 but also an LED display mechanism for displaying quantities in a circle graph manner can be used. Furthermore, a display mechanism can also be used which can change the luminous intensity or the luminous color according to the displayed values step by step or without step.

Further, in the above embodiment, in the case of the display unit, the structure using the LED display mechanism 8 and the structure using the LED display mechanism 16 have been described. However, any other display unit may also be used if it is possible to display numerical values or quantities using a display scheme comprising at least three states, for example in each of the point matrix systems with the LED display mechanism 8. LED display mechanism 16 may be used. Furthermore, the display unit is not limited to the display mechanism using the LED, but it is also possible to use the liquid crystal display mechanism. In addition, the display unit may be connected with a print, that is, the operation is printed on paper each time the crimping operation is executed, whereby the execution of the operation is displayed, whereby the crimping operations which have been executed previously can be recorded.

Further, in the above-described embodiment, the drive current of the DC motor having a given relation with respect to the hydraulic pressure of the hydraulic cylinder 10 and the pressure or the hydraulic pressure or the pressure of the piston 2 is detected, and the maximum value of the detected values is displayed. The structure has been described. However, optionally, as shown in Fig. 5, the execution of the individual crimping operations can be detected by the crimping operation detector 17, and the number of executions of the crimping operations detected by the crimping operation detector 17 is counted. 18), the count results of the crimping operations can be displayed via the display driver 13 on the LED display mechanism 8.

In the actual execution of the individual crimping operations, the possibility that the operator continues to press the trigger switch 5 or suddenly presses the trigger 5 switch again or fails to execute the crimping operation and thus executes the crimping operation again. There is this. Therefore, it is not always easy for the compaction operation detector 17 to detect the execution of individual compaction operations exactly one by one. Therefore, the compaction operation detector 17 may be configured such that it is not necessary to always detect exactly one execution of individual compaction operations. For example, the operation of the piston 2 may be detected by a micro switch. In other words, when the piston 2 advances and then returns at a given distance or more, it may be constantly defined that one crimping operation is completed. And the initiation and completion of the crimping operation may also be detected through changing patterns of the hydraulic pressure inside the hydraulic cylinder 10 or changing patterns of the drive current of the direct current motor 14. The counter circuit 18 and the display driver 13 may each be composed of a logic circuit or may be composed of a microcomputer similar to the above-described embodiment. When the number of executions of the crimping operations is counted and displayed in this manner, it is not only necessary to replace the parts of the electrically actuated hydraulic crimping tool, but also to confirm the life of the electrically actuated hydraulic crimping tool itself according to the displayed count. It is possible.

Furthermore, the display displayed by the display unit such as the LED display mechanism 8 is not limited to the number of times of the above-mentioned crimping operations and the maximum pressure value, but some other information about the crimping operation can also be displayed by the display unit. have. For example, in the case where the pressures applied to the piston 2 in each crimping operations are integrated in time and these integrated values are added together and displayed, the life of the electrically actuated hydraulic crimping tool is between the habits of the workers. Differences can be guessed more accurately, taking into account differences between and the shape of the crimp terminals and the differences between the materials.

Further, in the above-described embodiment, only the case where the numerical information can be displayed only when the display button 9 is pressed to turn on the display unit such as the LED display mechanism 8 has been described. However, optionally, the information can also be displayed independently of the display button 9. For example, such a display can be executed when the main switch of the electrically actuated hydraulic crimping tool is actuated or such a display can be executed only for a given time after completion of each crimping operation. In addition, a display unit such as the LED display mechanism 8 only appears when the cover of the main body 1 is removed, and a structure for executing such a display can be used. Furthermore, such a display can be performed for a given time after the display button 9 is pressed. Alternatively, the maximum pressure may be detected in advance, the number of executions of the pressing operation may be pre-counted using a microcomputer, and these displays may be switched with each other by pressing down the display button 9.

Further, in the above-described embodiment, only the case where the numerical information regarding the maximum pressure value and the number of executions of the pressing operations are displayed by the display unit such as the LED display unit 8 has been described. However, current numerical information can not only be displayed by a display unit such as the LED display unit 8 but also automatically printed on paper by the printer each time the crimping operation is executed or can be printed while the operator is operating the printer. May be In addition, when the maximum value does not reach a given value or the number of times of crimping operations exceeds a given value, the LED may blink red for display or an alarm unit such as a buzzer may alert.

Next, the embodiment shown in Fig. 6 with respect to the electrically operated hydraulic crimping tool according to the present invention will be described below. In Fig. 6, the pressure sensor 11 is mounted on a hydraulic cylinder 10 arranged inside the main body 1. This pressure sensor 11 is a sensor used for detecting the oil pressure inside the hydraulic cylinder 10 to be pressed against the piston 2. The pressure value of the hydraulic pressure detected by the pressure sensor 11 is transmitted to the comparison circuit 19. In addition, the output of the comparison circuit 19 is transmitted to the memory circuit 20 while the output of the memory circuit 20 is transmitted to the LED 21.

The detection value of the oil pressure output from the pressure sensor 11 is an analog signal which normally contains a voltage value. And, the comparison circuit 19 can compare the voltage value of the hydraulic pressure with a given voltage value V _ref using the operational amplifier, and outputs a binary signal indicating whether the voltage value of the hydraulic pressure exceeds the given voltage value V _ref . can do. Further, for example, in the case of the memory circuit 20 using the flip-flop circuit, a reset signal is transmitted to the reset terminal "RESET" at the start of the crimping operation, thereby outputting it as an initial value. The memory circuit 20 is prepared in advance in order to output an abnormal signal from the terminal Q. During a crimping operation, when a signal showing that the hydraulic voltage value exceeds the given voltage value V _ref is input to the set terminal "SET" one or more times, the memory circuit 20 can switch the state of the flip-flop circuit. This allows the normal signal to be output from the output terminal Q from then on. That is, when the oil pressure voltage value from the start of the crimping operation to the end thereof does not exceed the given voltage value V _ref , the memory circuit 20 continues to output an abnormal signal, on the other hand, the oil pressure voltage value. When the given voltage value V _ref is not exceeded at least once, the memory circuit 20 outputs a normal signal. The given voltage value V _ref is a voltage value obtained when the minimum value for making the oil pressure value high enough for the crimping operation corresponds to the detection value of the oil pressure of the pressure sensor 11. The LED 21 is an LED element arranged on the upper surface of the main body 1 and has green as its emission color. When the normal signal is output from the memory circuit 20, the LED 21 turns on, which makes it possible to notify the worker that the crimping operation is completed.

However, in this embodiment, the comparison circuit 19 and the memory circuit 20 are each composed of a microcomputer mounted on a substrate arranged inside the main body 1. Therefore, the detected value of the hydraulic pressure output from the pressure sensor 11 is input to the analog input terminal of this microcomputer, where the detected value is AD converted and thereby processed as a digital signal. In addition, the comparison circuit 19 and the memory circuit 20 are each composed of programs of microcomputers. In other words, the comparison circuit 19 consists of a program for comparing the detected value of the hydraulic pressure input therein through the analog input terminal with its associated one of the given voltage values V _ref stored in its associated storage zones at each sampling. When the detected value of the oil pressure is equal to or less than the given voltage values V _ref , the comparing circuit 19 performs no processing, and when the detected value of the oil pressure exceeds the given voltage values V _ref . The comparison circuit 19 transfers the control to the program of the memory circuit 20. The memory circuit 20 is composed of a program for rewriting data of a specific output port. This output port is set to a data output state showing an abnormal state as an initial value at the start of the crimping operation. When the comparing circuit 19 determines that the detected value of the hydraulic pressure exceeds the given voltage values V _ref , the output port is rewritten by the memory circuit 20 to the data output state showing the steady state. The LED 21 is connected to the current output port, and when the data showing the normal state is output, the LED 21 can be turned on.

According to the electrically actuated hydraulic crimping tool of the above structure, each time one crimping operation is finished, the operator can know from the LED 21 which is turned on that the hydraulic pressure during the current crimping operation has at least once exceeded the given voltage value V _ref . Thus, sufficient output is obtained during this crimping. In addition, when the LED 21 is configured to be turned on only when the crimping operation is normally executed, the fear that the occurrence of insufficient crimp can be overlooked when the LED 21 is not turned on due to the failure.

By the way, in the above-mentioned embodiment, the case where the pressure sensor 11 arrange | positioned inside the hydraulic cylinder 10 was used was demonstrated. However, according to the invention, the pressure sensor 11 may be arranged at any position on the hydraulic circuit as long as it can detect the pressure of the piston 2, or the pressure sensor 11 may be a direct measure of the pressure of the piston 2. It can also be placed at such a location to allow detection

In addition, as shown in FIG. 7, the drive current of the DC motor 14 disposed inside the main body 1 may be detected by the current detector 15, and the detected value may be It may be used instead of the detection value. Since the DC motor 14 has a substantially linear relationship between the drive current and its output torque, the output torque of the DC motor 14, that is, the hydraulic pressure applied to the hydraulic cylinder 10 by the hydraulic pump, is detected by detecting the drive current. It is possible to know. In addition, if it has a correlation between the drive current and the output torque, it is also possible to use any of the electric motors other than the direct current motor 14. In the case of the configuration shown in Fig. 7, the value of the drive current is compared with the voltage value V _ref V given by the comparison circuit 19, and the comparison result is transmitted to the buzzer 22 through the memory circuit 20. In this case, the drive current of the DC motor 14 is detected by the current detector 15 as a voltage value, and the given voltage value V _ref V is the minimum pressure value necessary for the hydraulic pressure to be sufficiently high during the crimping operation. The voltage value that can be obtained when it corresponds to the detected voltage value of the detector 15. The use of such a current detector 15 can eliminate the need for the use of a costly and unwieldy pressure sensor 11 as well as the time to seal and fix the pressure sensor 11 inside the hydraulic cylinder 10. And effort can be avoided. That is, by only modifying the electric circuit, the present invention can be implemented inexpensively.

The buzzer 22 is configured to notify the operator of the effect that when the memory circuit 20 outputs data showing the steady state, it makes a sound, whereby a pressure of a sufficiently large value is obtained. However, such confirmation sound may be given only for a short time, and therefore, preferably, after completion of the crimping operation, the reset signal may be immediately sent to the memory circuit 20 to stop the sound. In addition, the buzzer 22 can make an alarm sound only when the memory circuit 20 outputs data indicating an abnormal state even after the completion of the crimping operation, thereby notifying the operator of the effect that the pressing force of the crimping operation was small. It may also be configured. In such a case where the pressure of the crimping operation is notified, the LED 21 may also blink red as an alarm light instead of the buzzer 22. However, it is necessary to detect the completion of the crimping operation in order to stop the confirmation sound or to make an alarm sound or to use the LED 21 as an alarm light. Completion of the crimping operation can be detected, for example, by detecting the operation of the piston 2. In other words, when the piston 2 is advanced and returns by a given distance or more, it can be constantly considered that one crimping operation is completed. In addition, the completion of the crimping operation may be detected through a pattern change of the hydraulic pressure inside the hydraulic cylinder 10 or a pattern change of the drive current of the DC motor 14.

In addition, in the above-mentioned embodiment, the case where the determination result of the normal or abnormal state of a crimping | compression operation is notified to the worker using the LED 21 or the buzzer 22 was demonstrated. However, other units may also be used, for example other visual or auditory notification units, and in some cases, a notification unit that appeals to haptics. Furthermore, without using or in combination with such a notification unit, the notification result of a normal or abnormal state of the crimping operation may also be recorded in a memory or other storage medium, or any crimping operation was abnormal. Only when this is judged can the final crimping work be prevented from being executed.

In addition, as shown in Fig. 8, the maximum value of the hydraulic pressure detected by the pressure sensor 11 can be displayed by the LED display mechanism 16 of the seven-segment display type. In this case, the detected value of the pressure sensor 11 is transmitted to the peak hold circuit 12 in which the maximum value is detected. The peak hold circuit 12 is a circuit for holding the maximum value of the oil pressure detected by the pressure sensor 11. As the peak hold circuit 12, for example, an analog circuit such as an operational amplifier or a capacitor can be used, and the peak hold circuit 12 can also be configured by a program of a microcomputer. Then, the maximum value of the hydraulic pressure held by the peak hold circuit 12 is displayed by the LED display mechanism 16 as a decimal number through the display driver 13. If the maximum value of the hydraulic pressure in the crimping operation is displayed in this way, the operator can know more specific information. For example, even when the crimping operation is normally completed, a high possibility that insufficient crimping may occur in the crimping operation may be inferred when the crimping operation is actually repeated when outputting only the hydraulic pressure slightly exceeding the required pressure. . Here, the case where the LED display mechanism 16 is used to display the maximum value of the hydraulic pressure is shown. However, it is also possible to use other display mechanisms, such as liquid crystal display mechanisms. In addition, numerical values can be displayed on the display instrument as well as quantities corresponding to these numerical values can also be displayed using bar graphs.

In the structure shown in Fig. 8, the comparison circuit 19 compares the given value with the maximum value of the hydraulic pressure held by the peak hold circuit 12, thereby checking whether the latter has exceeded the former, The comparison result of 19 is sent to the LED 21. That is, here, the peak hold circuit 12 maintains the maximum value of the hydraulic pressure, thereby eliminating the need for the use of the memory circuit 20. In addition, when it is necessary to obtain only the comparison result by comparison, a storage unit such as the memory circuit 20 and the peak hold circuit 12 is not always necessary. The pressure detected by the pressure sensor 11 is not limited to the hydraulic pressure of the hydraulic cylinder 10, but the pressure of the piston 2 may be directly detected by the pressure sensor 11. In addition, as shown in Fig. 7, the drive current of the DC motor 14 can be detected.

In addition, in the above-described embodiment, description has been made with respect to the electrically operated hydraulic crimping tool. However, the present invention can also be similarly applied to other hydraulic crimping tools that can be operated by a drive power other than by electric power or by hand. Furthermore, the present invention can also be applied to crimping tools that do not use hydraulic pressure.

The description, including the specification, drawings and abstracts of Japanese Patent Application No. 2001-329299, filed October 26, 2001 and Japanese Patent Application No. 2001-329300, filed October 26, 2001, is generally referred to herein. See.

As can be clearly understood from the foregoing description, according to the crimping tool of the present invention, information about the crimping operation such as the maximum pressure in the crimping operation and the number of executions of the crimping operation is displayed as quantity information, so that the crimping operation has been executed normally. It is possible to easily determine whether or not the crimping tool needs to be serviced as well.

Further, according to the crimping tool of the present invention, since it is possible to determine whether the pressure in the crimping operation is equal to or greater than a given value, the possibility of occurrence of insufficient crimping in the crimping operation can be accurately identified. For example, in the case where the normal stage pressure is not obtained, when the judgment result is notified to the worker, the worker can immediately stop the current crimping work and take appropriate measures. In addition, when the current judgment result is recorded, the parts of the crimping tool having the possibility of causing insufficient crimping can be collected before the present crimping tool is delivered.

Claims (18)

A crimping work information detection unit for detecting information about the crimping work; A display unit for displaying quantity information, And a display control unit for causing the display unit to display the quantity information in accordance with the information detected by the crimping operation information detection unit. 12. The pressing operation information detecting unit according to claim 1, wherein the pressing operation information detecting unit includes a pressure sensor for detecting the pressure of the pressing tool, and the display control unit causes the display unit to display the maximum pressure value detected during one pressing operation by the pressure sensor. Crimping tool, characterized in that. The display apparatus according to claim 1, wherein the crimping job information detecting unit includes a job detector for detecting execution of the crimping job, and the display control unit counts the number of executions of the crimping jobs detected by the job detector to display the count results. Crimping tool, characterized in that for displaying. The crimping tool according to claim 1, further comprising an electric motor for generating a pressing force. 5. The pressing operation information detecting unit according to claim 4, wherein the pressing operation information detecting unit includes a current detector for detecting a driving current of the electric motor, and the display control unit causes the display unit to display the maximum current value detected during one pressing operation by the current detector. Crimping tool, characterized in that. The hydraulic pump of claim 4, further comprising a hydraulic pump which is driven by an electric motor which generates pressure. The crimping operation information detection unit includes a hydraulic sensor disposed in the hydraulic pump for detecting pressure, and the display control unit causes the display unit to display the maximum pressure value detected during one crimping operation by the hydraulic sensor. Crimping tool. The display device according to claim 4, wherein the crimping job information detecting unit includes a job detector for detecting execution of the crimping job, and the display control unit counts the number of executions of the crimping jobs detected by the job detector to display the count results. Crimping tool, characterized in that for displaying. A crimping work information detection unit for detecting information about the crimping work; And a pressure judging unit for judging whether the pressure is normal or abnormal according to the information detected by the crimping operation information detecting unit. The method of claim 8, wherein the crimping operation information detecting unit includes a pressure sensor for detecting pressure, and the pressure determining unit determines whether the pressure is normal or abnormal according to the pressure value detected by the pressure sensor. Crimping tool. 10. The crimping tool according to claim 9, further comprising a notification unit for notifying a normal or abnormal judgment result obtained by the pressure judging unit. 10. The method of claim 9, further comprising a display unit for displaying quantity information and a display control unit for causing the display unit to display the maximum pressure value detected during one pressing operation by the pressure sensor. tool. The crimping tool of claim 8, further comprising an electric motor for generating a pressure of the crimping tool. The pressure detection unit according to claim 12, wherein the crimping operation information detection unit includes a current detector for detecting a drive current of the electric motor, and the pressure determination unit determines whether the pressure is normal or abnormal according to the current value detected by the current detector. Crimping tool, characterized in that. The crimping tool according to claim 13, further comprising a notification unit for notifying a normal or abnormal judgment result obtained by the pressure judgment unit. 15. The method of claim 13, further comprising a display unit for displaying quantity information and a display control unit for causing the display unit to display the maximum current value detected during one pressing operation by the current detector. tool. The method of claim 12, wherein the crimping operation information detecting unit includes a pressure sensor for detecting pressure, and the pressure determining unit determines whether the pressure is normal or abnormal according to the pressure value detected by the pressure sensor. Crimping tool. The crimping tool according to claim 16, further comprising a notification unit for notifying a normal or abnormal judgment result obtained by the pressure judging unit. 17. The method of claim 16, further comprising a display unit for displaying quantity information and a display control unit for causing the display unit to display the maximum pressure value detected during one pressing operation by the pressure sensor. tool.