JP2009083043A - Diagnostic system of power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic system of a power tool capable of determining and displaying deterioration and failures of each power tool without increasing the size of the power tool itself and increasing cost by effectively utilizing a holding base for holding the power tool. <P>SOLUTION: This diagnostic system is constituted of the power tool 1 and the holding base 2. On the power tool 1 side, a memory 9 for storing a work history of the power tool 1 and a tool communication portion 10 for transmitting data of the work history in the memory 9 are provided. On the holding base 2 side, a holding base communication portion 14 for receiving data from the tool communication portion 10, a diagnostic portion 15 for determining deterioration and/or failures of the power tool 1 based on the received data, and a display portion 16 for displaying a diagnostic result of the diagnostic portion 15 are provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a diagnostic system for diagnosing deterioration or failure of an electric tool.

  Conventionally, in order to hold an electric tool other than at the time of work, for example, a holding base as described in Patent Document 1 has been used. Such a holding stand is suitably used in a factory line or the like.

  By the way, in particular, in an electric tool used in a factory line or the like, it is required to accurately determine the degree of deterioration and the presence or absence of a failure. In order to realize this, for example, it is conceivable that the power tool itself is provided with means for determining deterioration or failure and display means for displaying the determination result.

However, if the determination means and the display means are provided for each power tool as described above, there is a problem that the power tool itself is increased in size and cost. In addition, since it is difficult to provide a large display means on the operation panel or the like of the electric tool, there is a problem that it is difficult for the user to visually recognize the determination result.
Japanese Utility Model Publication No. 6-63285

  The present invention has been invented in view of the above-mentioned problems, and normally uses a holding stand that only has a holding function of the electric tool, without increasing the size and cost of the electric tool itself. It is an object of the present invention to provide a diagnostic system for an electric tool that can judge and display deterioration or failure of each electric tool while the electric tool is held at other times.

  The present invention for solving the above problems is a diagnostic system for an electric tool formed by using the electric tool 1 and a holding base 2 for holding the electric tool 1 other than during work. 1 includes a memory 9 for storing the work history of the electric tool 1 and a tool communication unit 10 for transmitting data of the work history of the memory 9. Holding unit communication unit 14 that receives the data of the diagnostic tool, a diagnostic unit 15 that determines deterioration and / or failure of the electric tool 1 based on the received data, and a display unit 16 that displays the diagnostic result of the diagnostic unit 15. It is characterized by that.

  By doing in this way, each electric tool 1 only needs to be provided with the memory 9 and the tool communication unit 10, and the determination of deterioration or failure based on the work history data is provided on the holding stand 2 side. This can be done by a certain diagnosis unit 15. In addition, since the display unit 16 is provided not on the electric tool 1 side but on the holding unit 2 side, the display unit 16 can be provided on a large size so that the user can easily recognize it without being restricted by the structure on the electric tool 1 side. .

  In other words, the electric power tool 1 is normally held only when the electric power tool 1 is held, and the electric power tool 1 is held at a time other than the work while effectively suppressing the increase in size and cost of the electric power tool 1 itself. During this time, it is possible to determine and display the degree of deterioration of each electric tool 1 and the presence or absence of a failure.

  In the power tool diagnostic system having the above-described configuration, the power tool 1 is provided with an operation state detection unit 11 that detects the current operation state of the power tool 1, and the tool communication unit 10 receives work history and operation state data. It is also preferable that the diagnosis unit 15 on the holding table 2 side determines deterioration and / or failure of the electric tool 1 based on the work history and the operation state data received by the holding table communication unit 14 while transmitting. In this way, more reliable diagnosis can be performed based on both past work history data and current operation state data.

  It is also preferable that a management device 18 connected to a plurality of holding bases 2 is provided, and the management device 18 is provided with the diagnosis unit 15 on the holding base 2 side in a lump. By doing in this way, it is not necessary to provide the diagnostic part 15 for every holding stand 2, and cost reduction is achieved. Further, the management device 18 can centrally manage the data and diagnosis results of each electric tool 1.

  According to the first aspect of the present invention, the electric power tool is held without increasing the size and cost of the electric tool by effectively utilizing a holding base that normally has only a holding function for the electric power tool. In the meantime, there is an effect that it is possible to judge and display deterioration or failure of each electric tool.

  In addition to the effect of the invention according to claim 1, the invention according to claim 2 has an effect that a more reliable diagnosis can be performed.

  In addition to the effect of the invention according to claim 1 or 2, the invention according to claim 3 can further reduce the cost, and the management device can centrally manage data and diagnosis results of each electric tool. There is an effect that can be done.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. 1 and 2 show an example of a power tool diagnostic system according to an embodiment of the present invention. The diagnosis system of this example is a system that is preferably used particularly in a factory line, etc., and is formed by an electric tool 1 and a holding stand 2 for holding the electric tool 1 except during work. Yes.

  As shown in FIG. 2, the electric power tool 1 includes a motor 4 that is a drive source in a housing 3 and a transmission mechanism 5 that transmits the output of the motor 4 to the distal end side. In this structure, the output is transmitted through the transmission mechanism 5. The electric tool 1 includes a trigger-like operation switch 7 for operating on / off of the motor 4 and a control unit 8 for driving and controlling the motor 4 according to an input from the operation switch 7. The tool used for work is selected and mounted from among the tip tools 6, and the operation switch 7 is pulled in to rotate the motor 4, and the tip tool 6 is driven to rotate through the transmission mechanism 5.

  As shown in FIG. 1, the power tool 1 side has a non-volatile memory 9 for storing the work history of the power tool 1 and the work history data stored in the memory 9 for the holding base 2 side. And a tool communication unit 10 for transmitting. The memory 9 is connected to the control unit 8 and is provided as a work history of the electric tool 1 so as to store a cumulative value of the driving time during which the operation switch 7 is pulled and the motor 4 is driven. The tool communication unit 10 includes a terminal unit that transmits data wirelessly, and is connected to the memory 9.

  Furthermore, the electric tool 1 includes a current sensor 12 that detects a current flowing through the motor 4 as an operation state detection unit 11 that detects a current operation state of the electric tool 1. The current sensor 12 is connected to the tool communication unit 10, and the current motor current value data is transmitted to the holding table 2 side via the tool communication unit 10.

  The holding table 2 is a holding table communication unit that performs wireless communication between the holding frame unit 13 having a storage recess 13 a for positioning and holding the electric tool 1 and the tool communication unit 10 of the electric tool 1. 14, a diagnosis unit 15 that determines deterioration and / or failure of the electric power tool 1 based on data received through the holding base communication unit 14, and a liquid crystal screen for displaying a diagnosis result by the diagnosis unit 15 The display part 16 which consists of.

  The holding base communication unit 14 is provided at a position facing the tool communication unit 10 of the electric power tool 1 in a state of being held in the storage recess 13 a of the holding frame unit 13, and a terminal unit that forms the tool communication unit 10 Are formed by terminal portions that perform wireless communication using infrared rays (both terminal portions are not shown in FIG. 2). In this example, data is transmitted / received by infrared wireless communication, but transmission / reception by other wireless communication or wired communication may be used.

  The diagnosis unit 15 uses the work history data of the electric tool 1 obtained through the communication units 10 and 14, that is, the accumulated value of the driving time of the electric tool 1 stored in the memory 9. Determine the degree of deterioration. Specifically, when the cumulative value of the driving time exceeds the predetermined value a1, it is determined that the deterioration has progressed and the life has been reached, and the display unit 16 shows that the electric tool 1 being held has a life. Display that maintenance is required. In addition, when another predetermined value a2 smaller than the predetermined value a1 is set and the cumulative value of the driving time is smaller than the predetermined value a1 and larger than the other predetermined value a2, It may be displayed that the deterioration is considerably advanced and the life (maintenance time) is near. At this time, it is also preferable to display the remaining driving time until reaching the lifetime on the display unit 16.

  Further, when the electric tool 1 is an impact tool including a hammer, it is also preferable to count the hammer hit number with the electric tool 1 and store the cumulative value of the hit number in the memory 9 as a work history. is there. In this case, when the cumulative value of the number of hits obtained from the power tool 1 exceeds the predetermined value b1, the diagnosis unit 15 of the holding stand 2 determines that the deterioration has progressed and the life has been reached, and the display unit 16 The fact that the electric tool 1 being held has a lifetime and needs maintenance is displayed. When another predetermined value b2 smaller than the predetermined value b1 is set, and the cumulative value of the number of hits is smaller than the predetermined value b1 and larger than the other predetermined value b2, It may be displayed that the deterioration has progressed considerably and the life (maintenance time) is near. At this time, it is also preferable to display the remaining number of hits until the life is reached on the display unit 16.

  Further, in the diagnosis system of the present example, in addition to the work history data (that is, the cumulative value of the driving time), the current operating state data of the power tool 1 (that is, the motor current value detected by the current sensor 12). ) Based on other diagnostic modes. In this diagnosis mode, when making a diagnosis, the operation switch 7 of the electric power tool 1 is operated while being held by the holding frame 13 to drive the motor 4 for inspection for a predetermined time to detect the motor current value. .

  The diagnosis unit 15 determines the progress of deterioration and the presence / absence of a failure using the cumulative value of the driving time and the motor current value input via the communication units 10 and 14. Specifically, when the cumulative value of the driving time exceeds the predetermined value a1, it is determined that the life has reached the same as the above-described diagnosis mode, and the display unit 16 needs to be maintained. Display.

  When the cumulative value of the driving time is less than or equal to the predetermined value a1, it is determined whether or not the input motor current value is within a predetermined normal range. If the power tool 1 is not within the normal range, it is determined that the power tool 1 has failed, and the display unit 16 displays that repair is necessary. If the power tool 1 is within the normal range, it is determined that the power tool 1 is normal, and that effect is displayed on the display unit 16.

  Note that the determination method is the same when the cumulative value of the number of hits is used as the work history data. That is, when the cumulative value of the number of hits exceeds the predetermined value b1, it is determined that the life has been reached, and the display unit 16 displays that maintenance is necessary. If the cumulative value of the number of strikes is less than or equal to the predetermined value b1, it is determined whether or not the input motor current value is within a predetermined normal range. The display unit 16 displays that repair is necessary. If it is within the normal range, it is determined that the power tool 1 is normal, and that effect is displayed on the display unit 16.

  As described above, the cumulative value of the driving time and the cumulative value of the number of hits are given as the work history data, and the motor current value is given as the current operation state data. However, the present invention is not limited to this. Alternatively, other data may be used.

  FIG. 3 shows another example of a power tool diagnostic system according to an embodiment of the present invention. Since the basic configuration of this example is the same as the configuration of the example described above with reference to FIGS. 1 and 2, detailed description of the corresponding configuration will be omitted, and only the characteristic configuration different from the example will be described below. It will be described in detail.

  In the diagnosis system of this example, a plurality of holding bases 2 are provided, and the electric tool 1 is provided on each holding base 2. Each holding table 2 is provided with a network communication unit 17, and each holding table 2 is connected to the management apparatus 18 via the network communication unit 17. The diagnostic unit 15 provided for each holding table 2 in one example is collectively provided in the management apparatus 18 as the diagnostic unit 15 on the holding table 2 side in this example.

  Accordingly, the work history and operation state data of the electric power tool 1 held on each holding table 2 is sent to the management device 18 connected to the network via the holding table 2, and is an example in the diagnosis unit 15 of the management device 18. It is used for the same determination. The determination result is centrally managed by the management device 18 and displayed on the display unit 16 provided in the management device 18.

  Although not shown, each holding base 2 may be provided with a display unit 16. In this case, the determination result in the diagnosis unit 15 of the management device 18 can be displayed on the display unit 16 of the holding stand 2 that holds the electric tool 1.

  That is, the diagnosis unit 15 and the display unit 16 on the holding table 2 side of the present invention are not limited to the configuration provided for each holding table 2 but also include the configuration provided for the management device 18 connected to the holding table 2 via a network. .

It is a lineblock diagram of an example diagnostic system of an electric tool in an embodiment of the present invention. It is a perspective view of a diagnostic system same as the above. It is a block diagram of the diagnostic system of the power tool of the other example in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric tool 2 Holding stand 9 Memory 10 Tool communication part 11 Operation | movement state detection part 14 Holding stand communication part 15 Diagnosis part 16 Display part 18 Management apparatus

Claims (3)

  A diagnostic system for an electric tool formed by using an electric tool and a holding base for holding the electric tool other than at the time of work, and the work history of the electric tool is stored on the electric tool side It is equipped with a memory and a tool communication unit that transmits data of the work history of the memory. On the holding table side, a holding table communication unit that receives data from the tool communication unit, and deterioration of the electric tool based on the received data A power tool diagnostic system comprising: a diagnostic unit that determines a failure; and a display unit that displays a diagnostic result of the diagnostic unit.   The power tool side is provided with an operation state detection unit that detects the current operation state of the power tool, and the work communication and operation state data are transmitted from the tool communication unit, and the holding unit communication unit The power tool diagnosis system according to claim 1, wherein deterioration or failure of the power tool is determined based on the work history and operation state data received in step (1). The diagnostic system for an electric power tool according to claim 1 or 2, further comprising a management device connected to a plurality of holding bases via a network, wherein the management device includes a diagnostic unit on the holding base side.

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