JP2003136421A - Crimp tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crimp tool which detects the pressure during the crimp work by the hydraulic pressure of a hydraulic cylinder 10 and the drive current of a DC motor 14, and easily determines whether or not any defective crimp occurs by indicating the maximum numeral of the detected value by an LED display device 8. SOLUTION: The hydraulic pressure in the hydraulic cylinder 10 of an electro- hydraulic crimp tool is detected, or the drive current of the DC motor 14 is detected by a current detector 15, and the maximum value of these detected values is held by a peak hold circuit 12, and indicated on the LED display device 8 via a display driver 13.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a crimping tool for crimping a crimp terminal or the like.

[0002]

2. Description of the Related Art Crimping work for a crimp terminal or the like is often performed by using a crimping tool such as a manual or electric machine. Further, such a crimping tool may apply a pressing force directly to the crimping terminal or the like by using a mechanism such as a gear or a link, or may press it by hydraulic pressure or the like.

A structural example of the electric hydraulic crimping tool will be described with reference to FIG. This electric hydraulic crimping tool presses a crimping terminal or the like set in the tool head portion 3 by a piston 2 that advances from a main body 1, and a hydraulic pump is driven by the rotation of a DC motor in the main body 1 via a planetary gear reduction mechanism. Is driven and the oil in the oil tank is sent to the hydraulic cylinder by this hydraulic pump to advance the piston 2.

In the above-mentioned electric hydraulic crimping tool, when the handle portion 4 is grasped by hand and the trigger switch 5 is pressed by a finger, a drive current is supplied from the battery pack 6 to the DC motor and the piston 2 advances. When the hydraulic pressure release button 7 is pressed with a finger, the oil in the cylinder is released to the oil tank side, and the piston 2 is pulled back by the spring.

[0005]

However, in the electric hydraulic crimping tool described above, although the crimping work cannot be performed normally unless the piston 2 presses the crimping terminal or the like with a hydraulic pressure higher than a predetermined value, for example, Even if the hydraulic circuit such as the hydraulic pump cannot output a sufficient hydraulic pressure due to the end of its service life and the piston 2 presses the crimping terminal with the hydraulic pressure that is less than the predetermined value, the crimping terminal will be Looking at it, it is difficult to judge that the pressing force was insufficient and the normal pressure bonding was not performed. For this reason, with the conventional electric hydraulic crimping tool, it is not possible to accurately know whether or not sufficient pressing force was obtained during crimping work, and this pressing force was insufficient, causing defects in crimping work. However, there was a problem that there was no way to confirm this.

Further, the above problem is not limited to the electric hydraulic crimping tool, and the same applies to the crimping tool manually or with other driving force, and is not limited to the crimping tool using hydraulic pressure.

The present invention has been made to cope with such a situation, and it is possible to easily judge whether or not a crimping failure has occurred by displaying the pressing force and the number of times of the crimping work. An object of the present invention is to provide a crimping tool that can be used.

[0008]

A crimping tool according to claim 1 is
Crimping work information detecting means for detecting information relating to crimping work, display means for displaying quantity information, and display control means for causing the displaying means to display quantity information based on the information detected by the crimping work information detecting means. It is characterized by having.

According to the first aspect of the present invention, since the display means displays the quantity based on the information relating to the crimping work detected by the crimping work information detecting means, the crimping work can be normally performed by referring to the quantity display. You will be able to determine whether or not you are The crimping tool is not limited to one that uses a driving force such as electric power, may be one that is manually operated, and whether or not to intervene hydraulic pressure is also not limited.

The quantity display means a display showing a numerical value or quantity in three or more display states. The numerical display is
For example, there is an advantage that the pressure value of the hydraulic pressure, the number of times of work, etc. can be clearly shown to the operator by displaying the number of one or more digits in decimal notation or the like. As such a display device for displaying a number in decimal notation, for example, an LED by 7 segment display or dot matrix display is used.
There are (light emitting diode) display devices and liquid crystal display devices.

The display of the quantity is performed by displaying the quantity of numerical information in a graph form, and has an advantage that the operator can intuitively and easily show the pressure value of hydraulic pressure, the number of times of work, and the like. For example, when a numerical value such as a hydraulic pressure value is displayed, it is necessary to have knowledge about the range of the normal pressure value, etc. It becomes possible to intuitively judge from an appropriate index or the like. As such a display device for displaying the amount in the form of a graph, for example, by segment display or dot matrix display, an area for continuous lighting, transmission, etc. is expanded / contracted and displayed in a bar graph shape or a pie graph shape.
There are ED display devices and liquid crystal display devices. Further, the display in the form of a bar graph or a pie graph can also be displayed steplessly in an analog manner by rotating a cylinder or a disk by an appropriate angle, for example. Further, the amount may be displayed not by the enlargement / reduction of the area but by the change of the shade or the color tone.

The display means for displaying the quantity includes a printer or the like for displaying the quantity by printing the quantity on paper or the like so as to remain as a record.

A crimping tool according to a second aspect of the present invention is a hydraulic crimping tool, wherein the crimping work information detecting means is a pressure sensor for detecting hydraulic pressure, and the display control means provides the pressure during one crimping work. It is characterized in that the maximum pressure detected by the sensor is displayed.

According to the second aspect of the present invention, the hydraulic pressure during the crimping work is detected by the pressure sensor, and the maximum value of this hydraulic pressure is displayed by the display means. Therefore, it is easy to determine whether or not sufficient pressure is applied by the crimping work. You will be able to judge.
The hydraulic crimping tool is not limited to one that uses a driving force such as electric power, but may be one that manually applies hydraulic pressure.

A crimping tool according to a third aspect is an electric hydraulic crimping tool for driving a hydraulic pump by a DC motor, wherein the crimping work information detecting means is a current detector for detecting a driving current of the DC motor, and display control is performed. It is characterized in that the means displays the maximum current value detected by the current detector during one crimping operation.

According to the third aspect of the present invention, the drive current of the DC motor during the crimping work is detected by the current detector, and the maximum value of this drive current is displayed by the display means. Since the relationship between the drive current and output torque of a DC motor is almost linear, if the maximum value of the drive current is known, the maximum hydraulic pressure applied during crimping work can be known, and crimping with sufficient pressure can be performed. You will be able to easily judge whether or not it was done.
Moreover, since it is not necessary to dispose a pressure sensor inside the hydraulic cylinder or the like, the present invention can be easily implemented only by modifying the electric circuit. The display control means may not display the maximum value of the drive current as it is, but may display it as a numerical value converted into hydraulic pressure.

According to a fourth aspect of the present invention, in the crimping tool, the crimping work information detecting means is a work detector for detecting the execution of each crimping work, and the display control means is the number of crimping works detected by the work detector. Is counted, and the counting result is displayed.

According to the invention of claim 4, the execution of each crimping work is detected by the work detector, and the count value of the number of times of detection is displayed by the display means. It becomes possible to use it as a guide for whether or not there is a possibility that a defect will occur in the crimping work, and to know the necessity of parts replacement or replacement of the crimping tool itself.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention. FIG. 1 shows LE by detecting the hydraulic pressure of a hydraulic cylinder.
FIG. 2 is a block diagram showing a circuit displayed by the D display device, FIG. 2 is a plan view of an electrohydraulic crimping tool for showing the LED display device provided in the main body, and FIG. 3 is an LED display device detecting a drive current of a DC motor. FIG. 4 is a block diagram showing a circuit displayed by, FIG. 4 is a block diagram showing a circuit when an LED display device for displaying a bar graph is used, and FIG. 5 shows a circuit displayed by the LED display device by counting the number of crimping operations. It is a block diagram shown. The constituent elements having the same functions as those of the conventional example shown in FIG. 6 are designated by the same reference numerals.

In this embodiment, an electric hydraulic crimping tool having the same structure as the conventional example shown in FIG. 6 will be described. As shown in FIG. 2, the electrohydraulic crimping tool of the present embodiment is provided with an LED display device 8 and a display button 9 on the upper surface of the body 1. The LED display device 8 is a display device that displays a 6-digit numerical value by means of an LED 7-segment display. The display button 9 is a switch that switches ON / OFF of the display by the LED display device 8.

In this electric hydraulic crimping tool, as shown in FIG. 1, a pressure sensor 11 is attached to a hydraulic cylinder 10 inside the main body 1. The pressure sensor 11 is
It is a sensor that detects the hydraulic pressure in the hydraulic cylinder 10 that presses the piston 2. The pressure value of the hydraulic pressure detected by the pressure sensor 11 is sent to the peak hold circuit 12. The peak hold circuit 12 includes the pressure sensor 1
1 is a circuit for holding the maximum value of the hydraulic pressure detected, and by resetting the value held at the start of the crimping work,
At the end of the crimping work, the maximum value of the hydraulic pressure during that work can be continuously output. This peak hold circuit 1
The maximum value of the hydraulic pressure output by 2 is sent to the display driver 13. The display driver 13 is a circuit for displaying the maximum value of the hydraulic pressure output by the peak hold circuit 12 on the LED display device 8 as a number in decimal notation.

The detected value of the hydraulic pressure output by the pressure sensor 11 is usually an analog signal composed of a voltage value. The peak hold circuit 12 can be configured as an analog circuit that outputs the maximum value of this voltage value by using an operational amplifier and a capacitor. Further, the display driver 13 can quantize this maximum value and control the 7-segment display of each digit of the LED display device 8 to display it as a decimal number.

However, in this embodiment, the peak hold circuit 12 and the display driver 13 are constituted by a microcomputer mounted on the back surface of the substrate on which the LED display device 8 is arranged. Therefore, the detected value of the hydraulic pressure output by the pressure sensor 11 is input to the analog input terminal of this microcomputer, where it is AD converted and processed as a digital signal. Moreover, the peak hold circuit 12 and the display driver 13 are configured by a program of a microcomputer. That is, the peak hold circuit 12
The initial value of the hydraulic pressure is set in a specific rewritable storage area at the start of the crimping work, and the detected value of the hydraulic pressure input from the pressure sensor 11 is set as the value set in the specific storage area for each sampling. By comparison, by repeating the process of replacing the value in the specific storage area with this detected value only when the detected value is larger, the maximum value of the hydraulic pressure during this work can be maintained after the crimping work is completed. it can. For example, in the case of dynamic display, the display driver 13 reads out the value set in this specific storage area for each display scan, converts the value into data for 7-segment display, and converts the value of each digit of the LED display device 8. It is possible to display the numbers in decimal notation by sequentially outputting the lighting / extinguishing signals to each segment.

According to the electric hydraulic crimping tool having the above structure, the operator pushes the display button 9 to turn on the LED display device 8.
With this, every time one crimping work is completed, the maximum value of the hydraulic pressure at the time of the crimping work can be displayed on the LED display device 8. Therefore, this maximum value exceeds the predetermined value. By confirming whether the hydraulic pressure is sufficient for crimping, it becomes possible to judge whether the crimping work is normally performed.

In the above embodiment, the pressure sensor 11 arranged in the hydraulic cylinder 10 is used as the crimping work information detecting means. However, if the pressing force of the piston 2 is detected, this pressure sensor 11 is used. The sensor 11 may be arranged at any position on the hydraulic circuit, and the pressure sensor 11 may be arranged at a position where the pressing force of the piston 2 can be directly detected.

Further, as shown in FIG. 3, the drive current of the DC motor 14 inside the main body 1 can be detected by the current detector 15, and this detected value can be used instead of the detected value of the pressure sensor 11. . Since the relationship between the drive current and the output torque of the DC motor 14 is substantially linear, the output torque of the DC motor 14, that is, the hydraulic pressure applied to the hydraulic cylinder 10 by the hydraulic pump can be known by detecting this drive current. it can. In the case of FIG. 3, the maximum value of this drive current is held by the peak hold circuit 12, and the display driver 1
3 is displayed on the LED display device 8. At this time, the numerical value indicating the maximum value of the drive current can be converted into a numerical value indicating the maximum value of the hydraulic pressure and displayed. When the current detector 15 is used in this way, not only is it unnecessary to use the expensive and cumbersome pressure sensor 11, but also the labor for sealing and fixing the pressure sensor 11 inside the hydraulic cylinder 10 is unnecessary. The present invention can be implemented at low cost simply by modifying the electric circuit.

Further, in the above embodiment, the LED display device 8 for displaying a numerical value has been described, but an LED display device 16 for displaying an amount may be used as shown in FIG. This LED display device 16 has 12 long and narrow LEs.
The display segments of D are arranged in a line, and as the displayed value increases, the number of the 12 display segments to be lit is sequentially increased from the left side to be displayed in a bar graph shape. Such an LED display device 16
By using, even if you do not know the actual values of hydraulic pressure and drive current required for crimping work, for example, the number of illuminated display segments exceeds 9, and 3 display segments with different emission colors at the right end It can be intuitively understood that sufficient hydraulic pressure could not be obtained unless one of the above is turned on, so there is an advantage that it becomes easy to judge whether or not the crimping work is normally performed. The LED display device 16 for displaying the amount is not limited to such a bar graph-like one,
It is also possible to use a pie chart. Further, it is possible to use a display device in which the emission color and the emission brightness are changed stepwise or steplessly according to the displayed value.

Further, in the above-mentioned embodiment, the case where the LED display device 8 or the LED display device 16 is used as the display means has been described, but as long as a display showing a numerical value or an amount is displayed by at least three display states, it is possible. Any type of LED display device 8 or LED display device 16 of dot matrix type can be used. Further, the display device is not limited to the display device using the LED, and a liquid crystal display device or the like can be used. In cooperation with the printer, the display is performed by printing on paper or the like each time the crimping work is performed. , It is also possible to record past work records.

Further, in the above embodiment, the hydraulic cylinder 1
The case where the maximum value is displayed by detecting the hydraulic pressure such as 0 or the pressing force of the piston 2 or the drive current of the DC motor 14 having a constant relationship with these pressures has been described, but as shown in FIG. The crimping work detector 17 detects the execution of each crimping work, the counter circuit 18 counts the number of crimping works detected by the crimping work detector 17, and the crimping work is detected by the LED driver 8 via the display driver 13. It is also possible to display the work counting result. The individual crimping work detected by the crimping work detector 17 is unsuccessful in the crimping work because an operator may continuously press the trigger switch 5 or repeatedly push it inadvertently during the crimping work. Since the work may be redone in the middle of the process, it is not always easy to detect exactly once. For this reason, the crimping work detector 17 does not necessarily need to reliably detect the execution of the crimping work one by one.
It is also possible to detect the movements such as the above with a micro switch or the like, and if the piston 2 or the like advances and returns for a certain distance or more, it is considered that one crimping work is completed uniformly, and the pattern of changes in the hydraulic pressure in the hydraulic cylinder 10 It is also possible to detect the start and completion of the crimping work based on the pattern of changes in the drive current of the DC motor 14, or the like. Counter circuit 18 and display driver 13
In addition to being configured by a logic circuit, can be configured by a microcomputer as in the above embodiment. When the number of times of crimping work is counted and displayed in this manner, it is possible to measure the necessity of component replacement and the life of the electric hydraulic crimping tool itself based on this number of times.

Further, what is displayed on the display means such as the LED display device 8 is not limited to the maximum pressure value and the number of crimping operations, but may be information on other crimping operations.
For example, by integrating and displaying the values obtained by time-integrating the pressing force applied to the piston 2 during each crimping operation, the life of the electrohydraulic crimping tool is considered in consideration of the habit of the operator and the difference in the material and shape of the crimping terminal. Can be guessed more accurately.

In the above embodiment, the case where the display is performed only when the display button 9 is pressed to turn on the LED display device 8 and the like has been described. However, regardless of such a display button 9, the electric hydraulic crimping is performed. It is possible to always display when the main switch of the tool is turned on, or to display only for a fixed time after the completion of the crimping work. Furthermore, the LED is only displayed when the cover of the main body 1 is removed.
It is also possible that the display device 8 or the like appears and the display is performed. Further, the display button 9 is pressed for a certain period of time, or the microcomputer detects, for example, the maximum pressure and counts the number of crimping operations. It is also possible to switch the display.

Further, in the above embodiment, the case where only the quantity information such as the maximum pressure value and the number of times of crimping work is displayed on the LED display device 8 or the like has been described.
It may be displayed on the LED display device 8 or the like, and may be made to print on a paper or the like by a printer each time the crimping work is performed, or to be printed on the printer by an operation of an operator. Further, when the maximum pressure value or the like does not reach a predetermined value or when the number of times of crimping work exceeds a predetermined value, it is judged and an alarm is issued by a red blinking LED display, a buzzer, or other warning means. You may

Further, although the electric hydraulic crimping tool has been described in the above embodiment, the present invention can be similarly applied to a driving force other than electric or a manual hydraulic crimping tool, and the same can be applied to a crimping tool that does not use hydraulic pressure. It is possible.

[0035]

As is apparent from the above description, according to the crimping tool of the present invention, information relating to crimping work such as the maximum pressing force during crimping work and the number of work is detected and displayed as quantity information. It becomes possible to easily judge whether or not the work is performed normally and the necessity of maintenance.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention and showing a circuit for detecting a hydraulic pressure of a hydraulic cylinder and displaying the hydraulic pressure on an LED display device.

FIG. 2 shows an embodiment of the present invention, and is a plan view of an electric hydraulic crimping tool for showing an LED display device provided in the main body.

FIG. 3 is a block diagram showing an embodiment of the present invention and showing a circuit for detecting a drive current of a DC motor and displaying it on an LED display device.

FIG. 4 is a block diagram showing an embodiment of the present invention and showing a circuit when an LED display device for displaying a bar graph is used.

FIG. 5 shows an embodiment of the present invention and is a block diagram showing a circuit for counting the number of pressure bonding operations and displaying the result on an LED display device.

FIG. 6 is an overall side view showing the configuration of the electric hydraulic crimping tool.

[Explanation of symbols]

2 pistons 8 LED display device 9 Display button 10 hydraulic cylinder 11 Pressure sensor 12 Peak hold circuit 13 Display driver 14 DC motor 15 Current detector 16 LED display 17 Crimping work detector 18 counter circuit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideaki Ishikura             Kyoto Prefecture Kyoto City Minami-ku Kichijoin Nishinosho Inono Babacho             No. 1 within Japan Battery Co., Ltd. (72) Inventor Shigeru Hirabayashi             3039 Sasaga, Matsumoto City, Nagano Prefecture Izumi Co., Ltd.             Inside the vessel factory F-term (reference) 3C030 BC31 BD02                 3C031 BB18                 5E063 BA01 CA01 CA05 CD02

Claims (4)

[Claims] 1. A crimping work information detecting means for detecting information on crimping work, and a display means for displaying quantity information.
A crimping tool, comprising: display control means for displaying quantity information on the display means based on the information detected by the crimping work information detecting means. 2. In a hydraulic crimping tool, the crimping work information detecting means is a pressure sensor for detecting hydraulic pressure, and the display control means is the maximum pressure detected by the pressure sensor during one crimping work. The crimping tool according to claim 1, wherein the crimping tool is displayed. 3. An electric hydraulic crimping tool for driving a hydraulic pump by a DC motor, wherein the crimping work information detecting means is a current detector for detecting a driving current of the DC motor, and the display control means is one time. The crimping tool according to claim 1, wherein a maximum current value detected by the current detector is displayed during the crimping operation. 4. The crimping work information detecting means is a work detector for detecting execution of each crimping work, and the display control means counts the number of crimping works detected by the work detector and The crimping tool according to claim 1, wherein a count result is displayed.