WO2023145639A1 - Work machine and program - Google Patents

Abstract

Provided is a work machine that improves convenience while ensuring the safety of a user and a device. The work machine comprises: a motor; a work unit that is driven by the motor; and a control circuit that controls the operation of the motor and that can communicate with an external device. The control circuit switches, through communication with the external device, operation modes that include: a work mode for operating the motor so that the work unit performs a series of work operations on a mating material; and a maintenance mode for operating the motor so that the work unit does not perform the series of work operations.

Description

implement and program

The present invention relates to a working machine and a program.

As an example of a working machine, there is known a driving machine that has a vertically movable striking part that is moved downward by the biasing force of compressed air filled in a pressure chamber to strike a fastener. .

As the above-described tool, for example, Patent Document 1 discloses a cylinder that guides the vertical movement of the striking part, and a cylinder that absorbs the impact when the striking part reaches the bottom dead center (second position). A tool is disclosed that is provided with a buffer for

Further, in such a fastening tool, during maintenance such as replacement of parts, a predetermined button provided on the body housing of the fastening tool is pressed to shift to the maintenance mode, and after the striking part is positioned at the bottom dead center, the The body housing can be opened.

Japanese Patent No. 6555423

On the other hand, in the fastening tool having the configuration described above, if a predetermined operation (pressing of the button) is accidentally or unexpectedly performed, the operation is shifted to the maintenance mode against the user's intention. There is a problem that normal use (strike operation of the fastener) becomes impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work machine that is more convenient for maintenance workers while preventing damage to the machine.

A working machine according to the present invention includes:
a motor;
a working part driven by the motor;
a control circuit that controls the operation of the motor and that can communicate with an external device.
The control circuit operates a work mode in which the motor is operated so that the work section performs a series of work operations on the mating material, and a work mode in which the work section operates the motor so that the work section does not perform the series of work operations. The operation mode including the maintenance mode is switched by communication with the external device.

According to the present invention, it is possible to improve the convenience of a person performing maintenance while preventing damage to the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially notched side view for demonstrating the outline|summary of the working machine system of embodiment of this invention. FIG. 2 is a cross-sectional view showing the structure taken along line AA of FIG. 1; (a) is a side view showing a state in which a striking portion of the working machine shown in FIG. 1 is at a bottom dead center (second position), and (b) is a view viewed from arrow A in the state of (a). (a) is a side view showing a state in which the striking part is in a standby position, and (b) is a view in the direction of arrow A in the state of (a). (a) is a side view showing a state in which the striking portion is at the top dead center, and (b) is a view from the arrow A in the state of (a). FIG. 2 is a block circuit diagram illustrating an electrical configuration of the work machine of FIG. 1; FIG. 2 is a block circuit diagram illustrating an electrical configuration of control equipment used in the working machine system of the present embodiment; FIG. FIG. 2 is a transition sequence diagram illustrating a communication method and the like when the work machine in FIG. 1 shifts from a normal mode to a maintenance mode; 4 is a flowchart for explaining transition conditions when the working machine of the present embodiment shifts from normal mode to maintenance mode. It is a figure which shows an example of the normal mode screen displayed on the control apparatus of this Embodiment. It is a figure which shows an example of the error screen displayed on the control apparatus of this Embodiment. It is a figure which shows an example of the maintenance mode screen displayed on the control apparatus of this Embodiment. FIG. 9 is a diagram showing another example of an error screen displayed on the control device of the embodiment; FIG. 2 is a transition sequence diagram for explaining communication performed between the electric nailer and the battery pack that constitute the work machine of FIG. 1; FIG. 4 is a transition sequence diagram for explaining communication between the battery pack and the control device according to the embodiment; FIG. 4 is a transition sequence diagram for explaining communication between the electric nailer, the battery pack, and the control device according to the present embodiment; FIG. 4 is a transition sequence diagram for explaining communication between the electric nailer, the battery pack, and the control device according to the present embodiment; FIG. 4 is a transition sequence diagram for explaining communication between the electric nailer, the battery pack, and the control device according to the present embodiment; FIG. 3 is a block circuit diagram illustrating an electrical configuration for explaining another example of a working machine in the working machine system of the embodiment; FIG. 7 is a partially cutaway side view for explaining another example of the work machine in the work machine system of the embodiment; FIG. 3 is a block circuit diagram for explaining another example of a working machine in the working machine system of the embodiment;

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. In the embodiments described below, unless otherwise specified, the term "user" means a person who performs work using a work machine, and is also referred to as an "unskilled person" as appropriate. On the other hand, a person who maintains a work machine is called a "specialist", a "skilled person", or the like. The term "worker" includes both users and specialists (experts).

<Embodiment 1> In Embodiment 1, a driving machine will be described as an example of a working machine. FIG. 1 is a partially cutaway side view for explaining an outline of a working machine system according to an embodiment of the present invention. 2 is a cross-sectional view showing the structure taken along line AA of FIG.

A driving machine 100 shown in FIG. 1 is an electric tool for driving a staple or a nail, which is a fastener 125, into a driven material W1 (mating material) such as wood or gypsum board. An electric nailer 100A as an electric tool and a battery pack 100B for supplying electric power to the electric nailer 100A are detachably attached to the driving machine 100. As shown in FIG.

Further, in the present embodiment, the driving machine 100 (that is, the electric nailing machine 100A and the battery pack 100B) as a working machine and an external device (a control device described later with reference to FIG. 5) that communicates between the driving machine 100 and the driving machine 100 The equipment 30) constitutes a working machine system. Each device constituting the working machine system will be described below. In the description, directions such as "up", "down", "left", and "right" are based on the description in the drawings.

<Overview of driving machine in working machine system> As described above, the driving machine 100 of the present embodiment is roughly divided into the electric nailer 100A, which is the main body of the working machine, and the battery pack 100B. be. Among these, the battery pack 100B corresponds to the battery pack of the present disclosure. In the present embodiment, battery pack 100B functions to supply electric power (DC power supply) to electric nailer 100A, communicates with electric nailer 100A, and functions to communicate with control device 30. and a function of relaying signals transmitted and received between the electric nailer 100A and the control device 30 . These functions of the battery pack 100B will be described later with reference to FIG. 4 and subsequent figures.

<Construction of Electric Nailer in Driver> First, the construction of the electric nailer 100A in the driver 100 will be described in detail. The electric nailer 100A includes a housing 111 as a main body, a striking part 112 as a working part, a magazine 113 as a holding part for holding fasteners 125, an electric motor 19 as a driving source, and a driving source. It has a transmission mechanism 115 for transmitting driving force and a counterweight 118 . The electric motor 19 corresponds to the motor of the present disclosure, and will be abbreviated as the motor 19 below.

Housing 111 has a cylindrical body 119 , a grippable handle 120 connected to body 119 , and a motor case 121 connected to body 119 and housing motor 19 . A mounting portion 122 is connected to the handle 120 and the motor case 121 . Battery pack 100B is detachably attached to mounting portion 122 . The motor case 121 is arranged between the handle 120 and the magazine 113 in the vertical direction in FIG.

In order to eject the stopper 125, an ejection portion 123 having an ejection passage 124 is provided at the tip of the trunk portion 119 (lower side in FIG. 1). That is, the injection section 123 is fixed to the body section 119 . With such a configuration, a user of the electric nailer 100A (hereinafter sometimes referred to as a worker) can hold the handle 120 and press the tip of the injection part 123 against the nailed material W1.

In one specific example, the stopper 125 is a U-shaped member called a staple or the like, and is housed inside the magazine 113 side by side in the horizontal direction in FIG. The magazine 113 has a feeder that urges the stopper 125 leftward in FIG. is placed at a position to be hit by the hitting part 112 . The magazine 113 having the above structure accommodates the stopper 125 and holds the stopper 125 so that it can be hit by the hitting part 112. Function.

The hitting part 112 is provided over the inside and outside of the body part 119 . Striking portion 112 has a striker 112a with a plunger 126 disposed within barrel 119 and a driver blade 127 (see also FIGS. 3A-3C where appropriate) attached to plunger 126. As shown in FIG. The driver blade 127 is a metal member for driving the stopper 125 . A plunger 126 to which a driver blade 127 is attached is made of metal or synthetic resin.

A guide shaft 128 is fixedly provided in the trunk portion 119 . In FIG. 1, a line passing through the center of the guide shaft 128 is shown as a center line E1. Guide shaft 128 is fixed to top cover 129 and bottom holder 130 .

Next, the construction of the working section of the electric nailer 100A will be described. The electric nailer 100A is driven by a motor 19, a coil spring 136 that can be expanded and contracted in a first direction (vertical direction) D1, and the driving force of the motor 19, and hits the fastener 125 and reciprocates in the first direction D1. It has a moving striking part 112 and a housing 111 that accommodates the motor 19 and the striking part 112 therein. The first direction D1 includes a downward direction, that is, a third direction D3 in which the striking portion 112 strikes the stopper 125, and an upward direction, that is, a fourth direction D4 that is opposite to the third direction D3. .

The housing 111 also includes a case member 111a having an opening 111e and a lid member 111b (see FIG. 2) attached to the case member 111a and covering the opening 111e. The opening 111e is formed at the end of the case member 111a in the fourth direction D4.

Here, the hitting part 112 has a plunger 126 that contacts the end of the coil spring 136 in the third direction D<b>3 (downward direction in FIG. 1 ) and can hit the stopper 125 .

In the striking portion 112, the plunger 126 moves upward while compressing the coil spring 136 when the driving force of the motor 19 is transmitted, and receives the biasing force of the coil spring 136 when the driving force of the motor 19 is interrupted. It moves downward and strikes the stop 125 with such downward movement.

The coil spring 136 can be removed from the opening 111e when the cover member 111b is removed from the case member 111a. Note that the first direction D1 is the same direction as the direction in which the coil spring 136 expands and contracts. A second direction (see FIG. 2) is a direction that intersects (perpendicularly) with the first direction in the depth direction of FIG.

As shown in FIG. 2, the case member 111a includes a first case member 111c and a second case member 111d attached to face the first case member 111c in the second direction D2. More specifically, as shown in FIGS. 1 and 2, the housing 111 of the electric nailer 100A includes a first case member 111c, a second case member 111d (case member 111a), and a lid member 111b. consists of three case members.

That is, the housing 111 is divided into a first case member 111c and a second case member 111d divided into left and right sides with respect to the center line E1 of the body portion 119, and the first case member 111c and the second case member 111d. and a lid member 111b capable of covering the opening 111e formed at the end of the body portion 119 in the fourth direction D4 in a state where the is fixed.

In other words, the housing 111 that holds the working portion including the coil spring 136, the counterweight 118, etc. has a three-division structure that is divided into a first case member 111c, a second case member 111d, and a lid member 111b. .

The fastening tool 100 having such a structure facilitates maintenance (replacement of broken or worn parts, etc.). That is, when carrying out maintenance of the driving tool 100, the parts housed in the body portion 119 such as the coil spring 136, the counterweight 118 and the plunger 126 can be taken out from the opening 111e simply by removing the cover member 111b. Therefore, parts replacement and the like can be easily carried out.

A plunger 126 , a coil spring 136 , a guide shaft 128 , and a counterweight 118 that contacts the end of the coil spring 136 in the fourth direction D<b>4 are provided in the body portion 119 of the housing 111 .

Further, inside the trunk portion 119, the driving force of the motor 19 drives the plunger 126 toward the end of the coil spring 136 in the fourth direction D4, and the counterweight 118 moves toward the end of the coil spring 136 in the fourth direction D4. A transmission mechanism 115 is provided that compresses the coil spring 136 by urging it toward the end in the three directions D3.

Here, the transmission mechanism 115 is a first gear 150, a second gear 151 and a third gear 152, for example. Further, a weight damper 137 with which the counterweight 118 released from the urging force of the transmission mechanism 115 can abut, and a plunger damper 138 with which the plunger 126 can abut are provided in the trunk portion 119 . It should be noted that the plunger damper 138 corresponds to the "regulator" of the present disclosure.

Next, regarding the working portion of the electric nailer 100A, the details of the function and operation of each member involved in striking the fastener 125 will be described.

The plunger 126 is attached to the outer peripheral surface of the guide shaft 128 and is operable along the guide shaft 128 in the direction of the center line E1. The guide shaft 128 radially positions the plunger 126 about the centerline E1. Driver blade 127 is operable with plunger 126 parallel to centerline E1. A driver blade 127 is operable within the injection path 124 .

Also, the counterweight 118 is a member that suppresses the reaction received by the housing 111 and is attached to the guide shaft 128 so as to be slidable. The counterweight 118 is operable along the guide shaft 128 in the direction of the centerline E1. The guide shaft 128 radially positions the counterweight 118 with respect to the centerline E1.

The body portion 119 also includes the coil spring 136 as described above, and the coil spring 136 is arranged between the plunger 126 and the counterweight 118 in the direction of the centerline E1.

For the coil spring 136, for example, a compression coil spring in which a metal wire is spirally wound can be used. The coil spring 136 can expand and contract in the direction of the center line E1. An end of the coil spring 136 on the side of the bottom holder 130 in the direction of the center line E1 contacts the plunger 126 directly or indirectly. That is, the end of the coil spring 136 on the side of the bottom holder 130 contacts the plunger 126 of the striker 112a. Therefore, the striker 112a forming the striking portion is driven by the spring force of the coil spring 136. As shown in FIG.

On the other hand, the end of the coil spring 136 on the side of the top cover 129 in the direction of the center line E1 contacts the counterweight 118 directly or indirectly. The coil spring 136 receives compression force in the direction of the center line E1 and accumulates elastic energy. In addition, the coil spring 136 is an example of a biasing portion that biases the striker 112 a and the counterweight 118 so as to strike the stopper 125 .

The plunger 126 receives from the coil spring 136 a biasing force in the third direction D3 that approaches the bottom holder 130 in the direction of the center line E1. The counterweight 118 receives from the coil spring 136 a biasing force in a fourth direction D4 that approaches the top cover 129 in the direction of the center line E1. The third direction D3 and the fourth direction D4 are opposite to each other, and the third direction D3 and the fourth direction D4 are parallel to the centerline E1. Plunger 126 and counterweight 118 are biased by the same physical element, coil spring 136 .

Also, a weight damper 137 and a plunger damper 138 are provided in the trunk portion 119 . Weight damper 137 is arranged between top cover 129 and counterweight 118 . A plunger damper 138 is arranged between the bottom holder 130 and the plunger 126 . Both weight damper 137 and plunger damper 138 are made of synthetic rubber.

Hereinafter, in the tool 100, the operation of the striker 112a, the plunger 126, or the counterweight 118 in the third direction D3 (one side of the first direction D1) will be referred to as lowering. Further, the actuation of the striker 112a or the counterweight 118 in the fourth direction D4 is referred to as raising. The striker 112a and the counterweight 118 can each reciprocate in the direction of the centerline E1.

The battery pack 100B can be attached to and removed from the attachment portion 122 of the electric nailer 100A. A control unit (first control unit 10, which will be described later) of the electric nailer 100A is provided in the mounting unit 122. As shown in FIG. The battery pack 100B has a secondary battery that serves as a DC power supply, and the electric power of the battery pack 100B can be supplied to the motor 19. FIG. That is, the motor 19 is driven by the electric power of the battery pack 100B. In addition to the secondary battery, the battery pack 100B also includes several electronic components, which will be described later.

The driving tool 100 is provided with a trigger 142 and a trigger switch 13 (see FIG. 4 as needed) on the handle 120. When the operator applies an operating force to the trigger 142, the trigger switch 13 is turned on. Become. When the operator releases the operating force applied to the trigger 142, the trigger switch 13 is turned off. The trigger 142 and the trigger switch 13 have a function as an "operation unit" that outputs an ON/OFF signal according to user's operation. In one specific example, a spring (not shown) is attached to the trigger 142 so that the trigger switch 13 is turned off in the normal state.

The motor 19 has a rotor and stator (not shown), and a motor shaft 146 is attached to the rotor. Motor 19 rotates motor shaft 146 when power is supplied from battery pack 100B. A speed reducer (not shown) arranged in the motor case 121 has a plurality of sets of planetary gear mechanisms, an input element 148 and an output element 149 . Input element 148 is connected to motor shaft 146 .

The transmission mechanism 115 converts the rotational force of the output element 149 into the operating force of the striking portion 112 and the operating force of the counterweight 118 . The transmission mechanism 115 has a first gear 150, a second gear 151 and a third gear 152, as shown in FIGS. 2 and 3A (a) and (b).

3A (a) and (b), the outer diameter of the first gear 150, the outer diameter of the second gear 151, and the outer diameter of the third gear 152 are the same. The second gear 151 meshes with the first gear 150 and the third gear 152 . A cam roller 157 is provided on the first gear 150 , two cam rollers 158 and 202 are provided on the second gear 151 , and two cam rollers 159 and 203 are provided on the third gear 152 . Cam roller 157 is rotatable with respect to first gear 150 . The two cam rollers 158, 202 are arranged on the same circumference. The two cam rollers 158 and 202 are rotatable with respect to the second gear 151, respectively. The two cam rollers 159 and 203 are rotatable with respect to the third gear 152, respectively.

Next, a usage example of the fastening tool 100 will be described mainly with reference to FIGS. Here, FIGS. 3A(a) and (b) show a state in which the striking portion (plunger 126, etc.) of the fastening tool 100 is at the bottom dead center (“second position” in the present disclosure). From another aspect, FIGS. 3A(a) and 3A(b) are diagrams showing a state in which the biasing force of the coil spring 136 is at its weakest, and are diagrams showing the "second position" of the present disclosure. Also, FIGS. 3A(a) and (b) show the state in the maintenance mode.

On the other hand, FIGS. 3B(a) and (b) show a state in which the striking portion (such as the plunger 126) is in the standby position. Also, FIGS. 3C(a) and (b) show a state in which the striking portion (such as the plunger 126) is at the top dead center.

Note that the standby positions shown in FIGS. 3B(a) and 3B(b) correspond to the “first position” of the present disclosure. Also, the position of the bottom dead center shown in FIGS. 3A (a) and (b) corresponds to the “second position” of the present disclosure.

As described above, the fastening tool 100 has a normal state mode (work mode) in which fasteners can be struck, and a maintenance mode for performing maintenance. Hereinafter, the work mode and the maintenance mode are collectively referred to as "operation mode" or simply "mode". For convenience of explanation, the work mode will also be referred to as a "normal mode" as appropriate.

In the work mode and the maintenance mode, the driving force of the motor 19 is transmitted to the first gear 150 through the output element 149 (rotation shaft, for example), and the first gear 150 and the second gear 151 rotate (cam rollers 157, 158). , 202) to move the striking part 112 (working part) in the vertical direction, but differ in the following points.

That is, in the work mode, the cam rollers 159 and 203 engage with the weight arm portion 135 of the counterweight 118 when the third gear 152 rotates in order to increase the biasing force of the coil spring 136 during impact. Move 118 down. By this operation, the stopper 125 can be driven out by increasing the impact force of the striker 112a. From another aspect, the work mode (normal mode) is a series of work operations in which the work part including the striker 112a strikes the stopper 125 against the driven material W1 (mating material), more specifically, The striker 112a located at the standby position (first position) is raised upward to the top dead center, then lowered to the bottom dead center by the biasing force of the coil spring 136, and raised to the standby position again. This is a mode for operating the motor 19 so as to perform an operation, and detailed operations in this work mode will be described later.

On the other hand, in the maintenance mode, the driving amount of the motor 19 is limited to a smaller amount than in the normal mode, so that the working part including the striker 112a performs the above-described series of operations on the workpiece W1 (counterpart material). This is a mode in which the motor 19 is operated so as not to operate.

By the way, as described above, when a predetermined operation (pressing of the button) is accidentally or unexpectedly performed in the fastening tool, the maintenance mode is entered against the user's intention. It has been pointed out that the work (that is, hitting operation of the stopper 125) cannot be performed. This problem will be discussed in more detail below.

The spring-type electric nailer as described above normally stands by with the coil spring 136 contracted (see FIG. 3B). Therefore, it is necessary to open the housing 111 when performing maintenance such as part replacement.

An electric nailer has a maintenance mode, which is different from the normal operation mode, as an operation mode for performing maintenance.

That is, in the spring-type electric nailer, the operation mode is switched from the work mode to the maintenance mode, and the plunger 126 and the driver blade 127 are gradually moved to weaken the biasing force of the coil spring 136 as much as possible, and then the housing 111 is opened. It must be opened (disassembled). In the maintenance mode, by repeatedly pressing the trigger 142 and intermittently rotating the motor 19, the plunger 126 and the driver blade 127 are positioned near the bottom dead center as shown in FIG. 2 position), it is desirable to open (disassemble) the housing 111 .

Further, conventionally, when switching from the work mode to the maintenance mode, for example, the switching can be performed by a predetermined operation such as long-pressing a predetermined (for example, a plurality of) buttons (not shown) provided on the housing 111 for a predetermined period of time. It was configured.

However, in the case of such a configuration, there is a possibility that the user may unexpectedly (unintentionally) perform the predetermined operation. If the maintenance mode is switched unintentionally, the user will not be able to drive nails (normal use), and will be forced to perform a complicated operation to return to the work mode.

In view of the circumstances as described above, it is considered desirable to have a configuration in which only skilled personnel, such as specialists who perform maintenance, can switch from the work mode to the maintenance mode.

Therefore, in the present embodiment, in order to allow only skilled personnel to switch from the work mode to the maintenance mode, the following configuration is adopted in which this switching operation is performed based on a dedicated application.

The driving machine 100 (work machine) of the present embodiment has a work mode in which the motor is operated so that the work unit performs a series of work operations on the mating material, and a work mode in which the work unit does not perform a series of work operations. A controller (control circuit) for switching operation modes based on communication with an external device on which a dedicated application is installed.

Here, as the external device, various terminal devices capable of communication (whether wired or wireless) with the fastening tool 100 (work machine) can be used. The following description assumes that a portable terminal called a smart phone is used as an external device. In this case, by accessing a predetermined server, the mobile terminal can download and install a dedicated application corresponding to the "program" of the present disclosure from the server.

Further, it is assumed that the external device is not owned by the user of the driving machine 100 (working machine), but is owned by a specialist (skilled person) who performs maintenance of the driving machine 100 (working machine). From another point of view, it is desirable to allow only specialists (experts) to download the dedicated application. As an example, it is conceivable to notify only a specialist (skilled person) of the personal identification number for downloading the dedicated application, or the activation method and operation method.

By adopting such a mechanism, the mobile terminal of the user (non-skilled person) cannot install, start up, or operate the dedicated application, and the user (non-skilled person) can switch from the work mode to the maintenance mode by the operation of the user (non-skilled person). Switching events will not occur. As a result, an improvement in user convenience is achieved or highly anticipated.

<Outline of Communication> The fastening tool 100 (working machine) of the present embodiment communicates wirelessly with the mobile terminal on which the dedicated application described above is installed via the battery pack 100B with a wireless communication function. Switching from the work mode to the maintenance mode is performed by receiving a predetermined signal from. Here, the predetermined signal is a switching signal for switching the operation mode from the work mode to the maintenance mode.

Next, referring to FIG. 4, the electrical configuration of the fastening tool 100 (work tool) will be described. FIG. 4 is a block circuit diagram illustrating the electrical configuration of the work machine of FIG. 1;

As shown in FIG. 4, the electrical configuration of the driving machine 100 (working machine) includes an electric nailing machine 100A on the main body side of the apparatus, a battery pack 100B detachable from the electric nailing machine, can be divided into

Here, the electric nailer 100A includes a first control section 10 having a central control section and a storage section, the motor 19 described above, a motor control section 11 for driving the motor 19, a control power supply circuit 12, a trigger switch 13, a push A switch 14, a top dead center switch 15, an LED 16, a remaining nail detection switch 17, a wired communication circuit 18, and the like are provided.

On the other hand, the battery pack 100B communicates with a rechargeable secondary battery V (indicated by a dashed line), a second control unit 20 having a central control unit and a storage unit, and the electric nailer 100A. It includes a circuit 21, a control power supply circuit 22, a wireless communication circuit 23 for performing wireless communication with the mobile terminal described above, and the like.

Among the above, blocks other than the motor 19, that is, the first control unit 10, each unit connected to the first control unit 10, the second control unit 20, and each unit connected to the second control unit 20 The circuit corresponds to the "control circuit" of this disclosure. This "control circuit" performs a function of controlling the operation of the motor 19, a function of communicating with external devices, and the like.

<Each block of the electric nailer> The first control unit 10 of the electric nailer 100A is responsible for controlling the entire electric nailer 100A, and includes a hardware processor such as a CPU, a RAM and a ROM. is provided. The first control unit 10 includes a motor control unit 11, a control power supply circuit 12, a trigger switch 13, a push switch 14, a top dead center switch 15, an LED 16, a nail remaining amount detection switch 17, and a wire via a bus or an interface (not shown). It is electrically connected with the communication circuit 18 .

The first control unit 10 reads out and executes a basic program stored in the ROM to control each unit (eg, motor control unit 11, LED 16, wired communication circuit 18) of the electric nailer 100A.

More specifically, the first control unit 10 selects the corresponding switch based on the result of communication with the battery pack 100B via the wired communication circuit 18 and the result of detection by the various switches (13, 14, 15, 17). By outputting a control signal to the block that performs the control, each part of the electric nailer 100A is controlled.

Under the control of the first control unit 10, the motor control unit 11 applies a drive voltage to the motor 19 through the control power supply circuit 12 to control the operation of the motor 19 (rotation direction, rotation speed, number of rotations, rotation time, etc.). ).

The control power supply circuit 12 converts the power supply voltage (direct current) supplied from the AC adapter described above into an appropriate value, and supplies the converted voltage to the first control unit 10, the motor control unit 11, and the like.

The trigger switch 13 is a physical switch that mainly serves as a trigger for the operation of the motor 19. As described above, it outputs an OFF signal in a normal state, and outputs an ON/OFF signal when the trigger 142 is operated. is output, and serves as the function of the “operation unit” of the present disclosure.

More specifically, the trigger switch 13 is in an ON state when the trigger 142 is held by the user's hand, and outputs an ON signal to the first control unit 10 . When the gripping force of the user is released from the trigger 142 , the trigger switch 13 is turned OFF by the spring force, and outputs an OFF signal to the first control unit 10 .

The push switch 14 is a switch that is switched ON/OFF by being pressed by a mating material during operation, and interlocks with the movement of the push lever 14L that is pressed against the workpiece W1 shown in FIG.

The push switch 14 is a switch provided separately from the trigger switch 13 as a condition for performing a series of work operations. Specifically, the first control unit 10 controls the operation of the nail on the condition that the push lever 14L is pressed against the workpiece W1 to turn on the push switch 14 and the trigger switch 13 is turned on. The operation of the motor 19 is controlled so as to perform a series of work operations for striking.

In the conventional configuration, by performing a predetermined operation on a button-type switch not shown in FIG. Switching from work mode to maintenance mode was performed.

In contrast, in the present embodiment, the configuration is such that the button type switch is not provided. In addition, the first control unit 10 of the present embodiment can be operated from the work mode regardless of any operation (state such as ON/OFF) of the various switches (13, 15, 17) in the electric nailer 100A. Do not switch to maintenance mode. The first control unit 10 switches from the work mode to the maintenance mode only according to the operation content (switching signal) of the mobile terminal (external device) received via the wireless communication circuit 23 of the battery pack 100B, which will be described later. .

With such a configuration, a person who is not familiar with the operation method in the maintenance mode of the electric nailer 100A (necessity to sufficiently release the urging force of the coil spring 136) may inadvertently switch to the maintenance mode. situation can be prevented.

The top dead center switch 15 is a switch that detects that the working unit (plunger 126) has reached the top dead center (see FIG. 3C), and outputs the detection result (on/off) to the first control unit 10. do. In the normal mode, the first control unit 10 and the motor control unit 11 control the rotation of the motor 19 based on the output of the top dead center switch 15 so that the working unit (such as the plunger 126) is stopped at the standby position. .

As shown in FIG. 3B, the standby position is a position in which the biasing force of the coil spring 136 is accumulated more, as can be seen in comparison with FIG. 3A, and the counterweight 118 is positioned lower than the position shown in FIG. , plunger 126, etc., are positioned higher than those shown in FIG. 3A.

Under the control of the first control unit 10, the LED 16 has a role of displaying the operation mode (normal mode or maintenance mode) of the electric nailer 100A.

The nail remaining amount detection switch 17 is a physical switch for detecting the remaining amount of the fasteners 125 in the magazine 113 and outputs a signal corresponding to the remaining amount of the fasteners 125 to the first control section 10 . In one specific example, the residual nail detection switch 17 detects the position of the above-described feeder that feeds out the fasteners 125 in the magazine 113, and when the feeder comes to a position in the magazine 113 where the fasteners 125 are exhausted, , to switch the output on and off.

The wired communication circuit 18 is a circuit having a predetermined input/output interface, and is connected to the wired communication circuit 21 of the battery pack 100B to communicate with the battery pack 100B under the control of the first control unit 10. Send and receive data.

<Each block of the battery pack> The secondary battery V of the battery pack 100B is a DC power supply that supplies a predetermined voltage, for example, a plurality of rechargeable and dischargeable lithium ion batteries connected in series.

A central control unit of the second control unit 20 plays a role of controlling the battery pack 100B, and includes a hardware processor such as a CPU and storage units such as RAM and ROM. The second control unit 20 is electrically connected to the wired communication circuit 21, the control power supply circuit 22, and the wireless communication circuit 23 via a bus, an interface, or the like (not shown).

The second control unit 20 reads and executes a basic program stored in the ROM to control each unit (here, the wired communication circuit 21, the control power supply circuit 22, and the wireless communication circuit 23) of the battery pack 100B. . Further, the second control unit 20 reads out and executes a dedicated application installed in the storage unit, thereby exerting its main function as a communication device that communicates with an external device and the electric nailer 100A.

Specifically, the second control unit 20 sends a control signal to the corresponding block based on the result of communication with the electric nailer 100A via the wired communication circuit 18 and the result of communication via the wireless communication circuit 23. By outputting the above-mentioned respective parts of the battery pack 100B are controlled.

The wired communication circuit 21 is a circuit having a predetermined input/output interface, and is connected to the wired communication circuit 18 of the electric nailer 100A to control the operation of the electric nailer 100A under the control of the second control unit 20. Send and receive data to and from

The control power supply circuit 22 converts the DC power supply voltage supplied from the secondary battery of the battery pack 100B into an appropriate value (only reduces the voltage), and supplies the converted voltage to the second control unit 20 and the like.

The wireless communication circuit 23 is a circuit having a wireless antenna (see FIG. 4) and a predetermined wireless interface. ) to communicate with each other. In one specific example, the wireless communication circuit 23 includes electronic components (NFC tags) or circuits for various near-field wireless communication (NFC) methods such as Bluetooth (registered trademark), wireless LAN (Wi-Fi), and infrared communication. can be used. The wireless communication circuit 23 corresponds to the "wireless communication section" of the present disclosure.

Note that when the battery pack 100B is removed from the electric nailer 100A, the connection state shown in FIG. 4 (here, electrical connection between the wired communication circuits 18 and 21 and power supply from the secondary battery) is cut off.

Next, with reference to FIGS. 1 to 4, the operation of each section in the work mode (normal mode) and maintenance mode will be described.

First, the operation of each part in the work mode (normal mode) will be described. When the tip of the injection part 123 is pressed against the workpiece W1, the push switch 14 is turned on and the trigger switch 13 is turned on. Electric power is supplied to rotate the motor shaft 146 forward. The rotational force of the motor shaft 146 is amplified by a speed reducer (not shown) and transmitted to the first gear 150 to rotate the first gear 150 counterclockwise.

When the first gear 150 rotates counterclockwise, the second gear 151 rotates clockwise and the third gear 152 rotates counterclockwise. When the first gear 150 rotates counterclockwise and the cam roller 157 engages the first arm 167, the plunger 126 operates in the fourth direction D4 shown in FIG. 1 against the biasing force of the coil spring 136. By doing so, the striking part 112 is lifted. Further, when the third gear 152 rotates counterclockwise and the cam roller 159 engages the weight arm portion 135, the weight arm portion 135 is operated by the cam roller 159, and the counterweight 118 moves downward, that is, downward (third direction D3).

While the first gear 150 and the second gear 151 are rotating, one cam roller 158 is engaged with the second arm 160 (engagement portion 126c) while the cam roller 157 is engaged with the first arm 167 . After that, the cam roller 157 is released from the first arm 167 . Further, while one cam roller 158 is engaged with the second arm 160 (engagement portion 126c), another cam roller 202 is engaged with the second arm 160 (engagement portion 126c) (see FIG. 3B). reference). Next, the cam roller 158 previously engaged with the second arm 160 (engaging portion 126c) is released from the second arm 160 (engaging portion 126c).

Then, when the counterweight 118 descends, the plunger 126 ascends. The counterweight 118 then reaches the bottom dead center (second position) and the plunger 126 rises further to reach the top dead center (see FIG. 3C). At this time, the biasing force of the coil spring 136 is maximized. After that, the two cam rollers 158 and 202 are both released from the second arm 160 (engagement portion 126c), and the coil spring 136 is released accordingly. When the coil spring 136 is released, the plunger 126 descends due to the biasing force of the coil spring 136 . Then, when the plunger 126 starts to descend, the counterweight 118 starts to rise due to the biasing force of the coil spring 136 .

When the plunger 126 descends, that is, when the striking portion 112 descends, the driver blade 127 strikes the stopper 125 located in the injection path 124 shown in FIG. By this impact, the stopper 125 is driven into the driven material W1.

After driver blade 127 hits stop 125 , plunger 126 hits plunger damper 138 . Plunger damper 138 absorbs a portion of the kinetic energy of striking portion 112 . Also, the counterweight 118 collides with the weight damper 137 . At this time, the weight damper 137 absorbs part of the kinetic energy of the counterweight 118 .

Thus, in the work mode, the first control unit 10 and the motor control unit 11 operate when the signals output from the push switch 14 and the trigger switch 13 (operation unit) are both ON. etc.), more specifically, after the striker 112a located at the standby position (first position) is raised upward to the top dead center, the coil spring 136 The operation of the motor 19 is controlled so as to perform a series of work operations in which it is lowered to the bottom dead center by the urging force of , and raised again to the standby position.

On the other hand, in the maintenance mode, the first control unit 10 and the motor control unit 11 change the signal output from the trigger switch 13 (operation unit) from OFF to ON while the ON signal is output from the push switch 14 . , the operation of the motor 19 is controlled so as not to perform the above work operation. Specifically, in the maintenance mode, the first control unit 10 and the motor control unit 11 control the operation of the motor 19 so that the working unit (such as the striking unit 112) is intermittently driven (moved). .

In other words, in the work mode, when an ON signal is output from the push switch 14 and the trigger switch 13 (operation unit), the first control unit 10 and the motor control unit 11 operate the motor 19 until the above work operation is completed. is operated continuously or continuously, and the striking part 112 is stopped at the standby position (first position) when the work operation is completed.

On the other hand, in the maintenance mode, when an ON signal is output from the trigger switch 13 (operation unit), the first control unit 10 and the motor control unit 11 operate the motor 19 to complete the above work operation. Control is performed to stop the operation of the motor 19 in advance. That is, in the maintenance mode, the first control unit 10 and the motor control unit 11 are operated by the operator a plurality of times so that an ON signal is intermittently output from the trigger switch 13 (operation unit). , the operation of the motor 19 is controlled so that the striking portion 112 is stopped near the bottom dead center (second position). Thus, when the striking portion 112 is positioned at the bottom dead center (second position), the biasing force of the coil spring 136 is at its weakest. In the maintenance mode, the drive amount of the motor 19 when an ON signal is sent once from the trigger switch 13 (operation unit) is set to an arbitrary drive amount that does not complete the above work operation. , the driving time of the motor 19 is preferably about 0.01 to 0.50 seconds, and the rotation angles of the first gear 150, second gear 151, and third gear 152 are preferably about 1 degree to 180 degrees. If a sensor or the like is provided as a detection unit for detecting that the plunger 126 has reached the bottom dead center, when the push switch 14 and the trigger switch 13 are turned on once in the maintenance mode, the plunger 126 reaches the bottom dead center. It is also possible to adopt a configuration in which the motor 19 is continuously driven until the detection unit detects the arrival. With such a configuration, there is no need to repeatedly turn on the push switch 14 and the trigger switch 13 to drive the motor 19 intermittently, thereby improving workability. In the maintenance mode, the first control unit 10 and the motor control unit 11 basically control the motor 19 so as not to perform a series of work operations, but it is necessary to completely exclude the series of work operations. There is no For example, even in the maintenance mode, when the operator performs a specific operation on the push switch 14 or the trigger switch 13, or operates an operation unit provided separately from the push switch 14 or the trigger switch 13, a series of operations is performed. It may be configured to operate. Also, after shifting from the work mode to the maintenance mode, a series of work operations are performed during the first operation when ON signals are first output from the push switch 14 and the trigger switch 13 (operation unit). A series of work operations may be performed at a specific timing even in maintenance mode, such as not performing a series of work operations.

Next, with reference to FIG. 5, an electrical configuration of a control device (external device) that communicates with battery pack 100B will be schematically described. FIG. 5 is a block circuit diagram for explaining the electrical configuration of control equipment used in the working machine system of the present embodiment. If the control device (external device) is a mobile terminal such as a smart phone, it actually has more blocks, but only the main electrical parts will be illustrated and explained here.

A control device 30 shown in FIG. 5 includes a control unit 31, a storage unit 32, a wireless communication unit 33, an external interface 34, a display unit 35, and the like.

Of the above, the control unit 31 and the storage unit 32 correspond to the above-described first control unit 10 (or the second control unit 20) and play a role of controlling the control device 30 as a whole. That is, the control unit 31 is a processor such as a CPU, and the storage unit 32 is a storage medium such as RAM or ROM.

The control unit 31 is electrically connected to other blocks (32 to 35) through a bus (not shown) or the like. The control unit 31 reads out and executes a basic program stored in the storage unit 32 (ROM) to control each unit of the control device 30 (here, the storage unit 32, the wireless communication unit 33, the external interface 34, and the display unit 35).

Specifically, the control unit 31 determines the relevant Each part of the control device 30 is controlled by outputting a control signal to the block.

The wireless communication unit 33 is a block equivalent to the wireless communication circuit 23 of the battery pack 100B described above. That is, the wireless communication unit 33 is a circuit including a wireless antenna (see FIG. 5) and a predetermined wireless interface, and performs communication with the battery pack 100B by transmitting and receiving wireless signals through the wireless antenna. .

The external interface 34 receives a signal from an operation input unit (input keys, a touch input unit, etc.) via, for example, a wired interface (connector), and supplies the received signal to the control unit 31 .

The display unit 35 is, for example, a liquid crystal display, and displays the states of the control device 30 and various external devices (electric nailer 100A and battery pack 100B in this embodiment) under the control of the control unit 31 . Examples of various screens displayed on the display unit 35 will be described later with reference to FIGS. 8 to 11. FIG.

Next, with reference to FIG. 6 and subsequent figures, communication contents and the like between the electric nailer 100A, the battery pack 100B, and the control device 30 in the present embodiment will be described. 6 and subsequent figures are mainly performed by the first controller 10 in the electric nailer 100A, the second controller 20 in the battery pack 100B, and the controller 31 in the controller 30. FIG.

FIG. 6 is a transition sequence diagram for explaining a communication method and the like when the work machine in FIG. 1 shifts from the normal mode to the maintenance mode.

When the electric nailer 100A (the first controller 10, the same applies hereinafter) is powered on with the battery pack 100B connected, the electric nailer 100A starts up in the normal mode (step S1). At this time, wireless communication is connected between the battery pack 100B and the control device 30, so that the control device 30 can display that the electric nailer 100A is in the normal mode. 8).

As shown in FIG. 6, when the electric nailer 100A is in the normal mode, for example, when an expert operates the control device 30 (for example, touches a predetermined button (not shown) of the mobile terminal), the control device 30 starts to charge the battery. A command (switching signal of the present disclosure) for switching to the maintenance mode is transmitted to the pack 100B (step S2). The battery pack 100B (second control unit 20, hereinafter the same) that has received such a signal transmits (transfers) the received signal to the electric nailer 100A (step S3). Then, when the electric nailer 100A receives the transferred signal for transitioning to the maintenance mode from the battery pack 100B, it determines whether or not the conditions for transitioning to the maintenance mode are satisfied (step S10).

Hereinafter, with reference to FIG. 7, the content of the determination processing in step S10 will be described more specifically. FIG. 7 is a flowchart for explaining transition conditions when the working machine according to the present embodiment shifts from the normal mode to the maintenance mode.

When the electric nailer 100A receives the signal to change to the maintenance mode, the electric nailer 100A acquires the detection result of the nail remaining amount detection switch 17 to confirm the remaining amount of nails (step S11). Subsequently, the electric nailer 100A determines whether or not there are any nails remaining in the machine (step S12).

If the electric nailer 100A determines Yes, that is, that there are nails left, it determines that the condition (transition condition) for shifting to the maintenance mode is not satisfied (step S13), and sends error information to the battery pack 100B. Send (step S20 in FIG. 6).

Referring to FIG. 6, battery pack 100B then transfers the error information received from electric nailer 100A to control device 30 (step S21). The control device 30 that has received this error information displays the error information on its own display unit 35 (step S25, see FIG. 9 as appropriate).

Returning to the description of FIG. When the electric nailer 100A determines No in step S12, ie, no nails remain, it determines that the condition (transition condition) for shifting to the maintenance mode is satisfied (step S14). At this time, as shown in FIG. 6, the electric nailer 100A switches its own mode from the normal mode to the maintenance mode (steps S30 and S31), and generates a signal (message) notifying that the mode has been changed. to the battery pack 100B (step S21). Receiving this signal (message), the battery pack 100</b>B transmits (transfers) the received signal (message) to the control device 30 . Upon receiving such a signal (message), the control device 30 displays that it is in the maintenance mode on its own display section 35 (step S21, also refer to FIG. 10 as appropriate).

Next, specific examples of screens displayed on the display unit 35 of the control device 30 will be described with reference to FIGS. 8 to 11. FIG.

FIG. 8 is a diagram showing an example of a normal mode screen displayed on the control device of this embodiment. This normal mode screen is a screen for displaying that the operation mode of the electric nailer 100A is the normal mode, and is displayed when the power of the electric nailer 100A is turned on (at the time of initial activation described in step S1 of FIG. 6). In addition, it is commonly used when transitioning from maintenance mode to normal mode.

In the display state of the normal mode screen shown in FIG. 8, when the user (expert) of the control device 30 selects the "maintenance" button, as described above with reference to FIG. A command to that effect (switching signal of the present disclosure) is transmitted to battery pack 100B (step S2). Then, the electric nailer 100A that has received this switching signal via the battery pack 100B executes the transition to the maintenance mode on the condition that the transition condition is satisfied (in the case of the allowable state of the present disclosure). (step S10, step S30, etc.).

FIG. 9 is a diagram showing an example of an error screen displayed on the control device of this embodiment. This error screen is transmitted from the electric nailer 100A when it is determined that the electric nailer 100A is in the normal mode and the conditions for transition to the maintenance mode are not satisfied (step S13 in FIG. 7). This screen is displayed based on the error information (see step S20 in FIG. 6) transferred from the pack 100B. In the example shown in FIG. 9, the display unit 35 of the control device 30 warns that "a nail is attached" and prompts an action to cancel the error by saying "Please remove it for safety." A message is displayed.

From another point of view, whether or not the signal transmitted from the control circuit shown in FIG. or not) on the control device 30.

FIG. 10 is a diagram showing an example of a maintenance mode screen displayed on the control device according to this embodiment. This maintenance mode screen is a screen displayed when the electric nailer 100A transitions from the normal mode to the maintenance mode, and as can be seen by comparison with the normal mode screen of FIG. The display shown is different.

FIG. 11 is a diagram showing another example of the error screen displayed on the control device according to this embodiment. In the error screen shown in FIG. 11, although wireless communication between control device 30 and battery pack 100B is connected, any work machine (electric nailer 100A in this example) is connected to battery pack 100B. This is the screen that appears for not.

Specifically, in the error screen described above with reference to FIG. 9 and other screens shown in FIG. It is possible to recognize that the electric nailer 100A is connected to the battery pack 100B from the tool information transmitted from. Therefore, as shown in FIGS. 8 to 10, the control device 30 displays (1) a display indicating the work machine (in this example, the electric nailer 100A), and (2) a display indicating that the work machine is (3) the current mode of the working machine (normal mode or maintenance mode in this example), etc. can be displayed.

On the other hand, when none of the work machines is connected to battery pack 100B, control device 30 does not transmit tool information or the like even when wireless communication with battery pack 100B is connected. None of the above (1) to (3) can be displayed because the information or signals transmitted from the aircraft cannot be received. Therefore, in such a case, as shown in FIG. 11, control device 30 displays a "?" Along with the content of the error "The tool cannot be recognized.", a display indicating the cause of the error "There is a possibility that nothing is attached to the battery pack or the power is turned off." is displayed.

Next, with reference to FIGS. 12 to 16, the contents of communication between electric nailer 100A and battery pack 100B of the present embodiment will be described in more detail. Here, FIG. 12 is a transition sequence diagram for explaining communication between the electric nailer and the battery pack that constitute the work machine of FIG. Also, FIG. 13 is a transition sequence diagram for explaining communication between the battery pack and the control device according to the present embodiment. 14 to 16 are transition sequence diagrams for explaining communication between the electric nailer, the battery pack, and the control device according to the present embodiment.

Referring to FIG. 12, while the electric nailer 100A and the battery pack 100B are connected, regardless of the above-described operation mode (work mode (normal mode) or maintenance mode), Repeated communication is performed at the specified timing. In the example shown in FIG. 12, the electric nailer 100A confirms tool information including its own operation mode (step S100), and transmits it to the battery pack 100B (step S101). In response, the battery pack 100B transmits its own battery pack information to the electric nailer 100A (step S102).

Here, the tool information transmitted from the electric nailer 100A to the battery pack 100B includes, for example, the type of work machine ("electric nailer" in this example), product ID, power on/off, and the like. mentioned. On the other hand, the battery pack information transmitted from the battery pack 100B to the electric nailer 100A includes, for example, the type of battery pack (for example, number of batteries, maximum output voltage, etc.), product ID, remaining battery level (full charge or not). charging), and the like.

Further, as shown in FIG. 13, while the battery pack 100B and the control device 30 are in an environment in which they can communicate with each other (while they are wirelessly connected in this example), the battery pack 100B and the electric nailer 100A (further mode of the electric nailer 100A), the communication is repeatedly performed at a predetermined timing.

Here, FIG. 13 shows an example of communication contents between control device 30 and battery pack 100B in the state shown in FIG. Specifically, control device 30 transmits a message for confirming (inquiring about) the current installation status of the work machine (power tool) to battery pack 100B (step S103). Then, the battery pack 100B that has received such a message, in this example, transmits a message to the effect that the electric nailer is attached to the control device 30 (step S104).

14 is a diagram showing a communication sequence for the control device 30 to confirm the current operation mode of the electric nailer 100A and display the confirmation result on the display section 35 of the control device 30. As shown in FIG. The communication sequence shown in FIG. 14 is repeatedly executed at regular time intervals.

Referring to FIG. 14, control device 30 transmits a message (inquiry signal) for confirming the current operation mode of electric nailer 100A to battery pack 100B (step S105). Battery pack 100B that has received such a message transmits (transfers) the received message to electric nailer 100A (step S106).

Subsequently, the electric nailer 100A, which has received this message, confirms the current operation mode (normal mode or maintenance mode in this example) in the repeatedly executed mode confirmation operation (step S100). , a reply signal is transmitted to the battery pack 100B (step S107). Further, the battery pack 100B that has received the response signal transmits (transfers) the received response signal to the control device 30 (step S108). Thus, the control device 30 that has received the response signal displays the current operation mode (normal mode or maintenance mode) of the electric nailer 100A on its own display unit 35 (see FIGS. 8 and 10). ).

On the other hand, FIG. 15 shows a case where the attachment of the electric nailer 100A to the battery pack 100B (that is, the wired connection between the two) is released in the maintenance mode (step S31) described above. In this case, the battery pack 100B transmits to the control device 30 a message notifying that the attachment (wired connection) of the power tool has been released (step S104-1). As shown in FIG. 15, this message indicates that the tool information transmitted from the electric nailer 100A to the battery pack 100B has changed (step S101-1: for example, when the power of the electric nailer 100A is turned off). When the battery pack 100B detects that the switch has been made, the information is transmitted from the battery pack 100B to the control device 30 .

Thus, the control device 30 that receives the message from the battery pack 100B notifying that the attachment (wired connection) of the power tool has been cancelled, displays the error screen as described above with reference to FIG. After that, when the battery pack 100B and the electric nailer 100A are connected again, the electric nailer 100A is started in the normal mode (work mode) as an initial state (see step S1 in FIG. 6). reference).

Note that, for example, the control device 30 and the battery pack 100B are wirelessly connected before the electric nailer 100A and the battery pack 100B are connected, and the control device 30 performs an operation to instruct the transition from the normal mode to the maintenance mode. After that, the electric nailer 100A and the battery pack 100B may be connected by wire. In this embodiment, in this case, the electric nailer 100A is activated in the maintenance mode. Such a configuration improves usability for a person who maintains the electric nailer 100A.

Further, FIG. 16 shows a signal (step S36: mode switching signal for switching to the normal mode) transmitted from the control device 30 when the operation mode of the electric nailer 100A is the maintenance mode (step S31). Based on this, the case where the mode of the electric nailer 100A is switched is shown.

In this case, battery pack 100B transfers the mode switching signal received from control device 30 to electric nailer 100A (step S37). Upon receiving the mode switching signal, the electric nailer 100A performs control to switch its own mode from the maintenance mode to the normal mode (steps S40 and S41), and after transitioning to the normal mode, changes the mode. A signal notifying of this is transmitted to battery pack 100B (step S42). Subsequently, battery pack 100B transfers the notification signal received from electric nailer 100A to control device 30 (step S43). Furthermore, the control device 30 displays the current mode of the electric nailer 100A (normal mode in this example) in response to the notification signal received from the electric nailer 100A (step S45).

As described above with reference to FIG. 6, in the present embodiment, the electric nailer 100A switches from the normal mode (work mode) to the maintenance mode based on the mode switching signal transmitted from the control device 30 held by the maintenance expert. It is configured. Then, after the maintenance expert has performed the maintenance work of the electric nailer 100A, as described with reference to FIG. 100A switches from maintenance mode to normal mode (work mode).

According to the work machine system of the present embodiment having such a configuration, it is possible to prevent damage to the electric nailer 100A and improve the convenience of maintenance personnel.

Further, in the present embodiment, the operation mode of the driving machine 100 (working machine) is switched by communication (wireless communication) with the control device 30 (external device). The mode switching operation can be easily performed by a person (maintenance expert) other than the user (operator).

<Modified example> The communication between the driving machine 100 (working machine) and the control device 30 (external device) may use not only wireless communication as described above, but also wired communication additionally or alternatively. . Also, the external device is not limited to the portable or mobile terminal described above, and various devices capable of communicating with the work machine can be used.

Further, in the above-described embodiment, the example of the driving tool that uses the spring member (coil spring 136) as the biasing portion and the working portion receives the biasing force of the coil spring 136 to perform the striking operation has been described. On the other hand, the configuration of the urging section is not limited to this. In addition, for example, the working section (piston) operates under the pressure (urging force) of the compressed gas sealed in the pressure chamber (also referred to as the pressure accumulator). It may be a so-called gas spring type driving tool that performs impacting work with the

A specific example of the gas spring type fastening tool is described in, for example, International Publication No. 2018/020955. In the gas spring type driving machine, the same operation is performed except that the piston (corresponding to the striking portion 112 in the embodiment shown in FIG. 1) is operated by the pressure of the gas in the pressure chamber to perform the striking operation. Therefore, a detailed description of the fastening tool is omitted here.

As an example of applying the above-described characteristic configuration to a gas spring type driving tool, a control device (30) that communicates an external device having a compressed air generating unit such as an air pump with the driving tool by wire. It can be considered to be used as FIG. 17 shows an electrical block configuration of the working machine system of this application example.

FIG. 17 is a diagram corresponding to the configuration of FIGS. 4 and 5 described above. Blocks equivalent to the blocks described above with reference to FIGS. 4 and 5 are denoted by the same reference numerals in FIG. . 4 and 5, in the work mode, the first control unit 10 and the motor control unit 11 receive ON signals from the push switch 14 and the trigger switch 13 (operation unit). When output, the piston located at the standby position (first position) is raised upward to the top dead center, then lowered to the bottom dead center by the biasing force received by the piston from the pressure chamber, and returned to the standby position. The motor 19 is continuously or continuously operated until a series of work operations for lifting is completed, and control is performed to stop the piston at the standby position (first position) when the work operation is completed. On the other hand, as can be seen by comparison with FIGS. 4 and 5, in the working machine system shown in FIG. 17, communication is performed between the external device 30 and the electric nailer 100A. No communication is performed with the pack 100B. Therefore, the wireless communication circuit 23 is not provided in the battery pack 100B, and instead, the communication section 36 is added to the electric nailer 100A. The communication unit 36 includes a wired communication interface (not shown) and the like, is connected to the first control unit 10 of the electric nailer 100A, and is connected to the communication unit 37 of the external device 30, which will be described later, via a wired cable. be done.

On the other hand, the external device 30 shown in FIG. 17 includes a compressed air generating section 39 such as a pump, a motor 38 for driving the compressed air generating section 39, and a communication section 37 for wired communication with the electric nailer 100A. It is different from the configuration shown in FIG. Among them, the communication unit 37 and the motor 38 are each connected to the control unit 31 described above with reference to FIG. 5 and operate under the control of the control unit 31 . The communication unit 37 has a configuration equivalent to that of the communication unit 36 of the electric nailer 100A, includes a wired communication interface (not shown), etc., and is connected to the communication unit 36 of the electric nailer 100A via a wired cable. , and transmits and receives signals to and from the electric nailer 100A. Also, although not shown, the compressed air generator 39 has a pipe for supplying the compressed air generated by the rotation of the motor 38 to the pressure chamber of the gas spring type fastening tool.

Thus, in the working machine system having the electrical configuration shown in FIG. Based on the switching signal transmitted by wire to 100A, the electric nailer 100A (gas spring type nailer) enters the maintenance mode described above. In the maintenance mode of the gas spring nailer, when the pressure in the pressure chamber of the electric nailer 100A drops due to gas leakage, the pressure chamber is filled with gas from the compressed air generator 39. This is the mode used to return the pressure to the correct value. In the maintenance mode, the first control unit 10 and the motor control unit 11 operate the motor 19 by a predetermined amount when an ON signal is output from the trigger switch 13 (operation unit), and before the above work operation is completed. Control to stop the operation of the motor 19 is performed. That is, in the maintenance mode, the first control unit 10 and the motor control unit 11 are operated by the operator a plurality of times so that an ON signal is intermittently output from the trigger switch 13 (operation unit). , the operation of the motor 19 is controlled so that the piston is stopped near the bottom dead center (second position). When the operator operates the external interface 34 of the external device 30 after the piston stops near the bottom dead center, the compressed air generator 39 is driven to fill the pressure chamber of the electric nailer 100A with compressed air. can. The air pressure in the pressure chamber becomes maximum when the piston is positioned at the top dead center, and is minimum when the piston is positioned at the bottom dead center. Therefore, by supplying air from the external device 30 to the pressure chamber at the timing when the piston is positioned at the bottom dead center, it is possible to reduce the reaction force that the compressed air generator 39 receives from the pressure chamber. It is possible to downsize the device 30 and increase the pressure of the air in the pressure chamber.

By adopting such a configuration, it is possible to prevent a situation in which a person who is not familiar with the operating method of the electric nailer 100A in the maintenance mode inadvertently shifts to the maintenance mode.

<Embodiment 2> Next, with reference to Figs. 18 and 19, a working machine system according to a second embodiment comprising a working machine and an external device will be described.

Here, FIG. 18 is a partially cutaway side view for explaining another example of the working machine in the working machine system of the second embodiment. Moreover, FIG. 19 is a block circuit diagram for explaining another example of the working machine in the working machine system of the second embodiment.

The above-described characteristic configuration can be applied to various working machines other than the nailing machine, and FIG. 18 shows a jigsaw 400, which is an electric cutting tool, as an example of another working machine.

18 and 19, the jigsaw 400 controls an electric motor 417, a working part such as a saw blade 443 driven by the electric motor 417, the operation of the electric motor 417, and can communicate with external devices. and a control circuit (116, etc.). Note that the motor 417 corresponds to the motor of the present disclosure, and is abbreviated as the motor 417 below.

First, the general operation of jigsaw 400 will be described. In jigsaw 400, when trigger 469 is operated, motor 417 is driven, the driving force of motor 417 is transmitted to gear 427, and gear 427 rotates. When the gear 427 rotates, the support shaft 439 rotates on the circumference of a circle whose diameter is the eccentric distance from the support shaft 425 , and this rotary motion is converted into linear motion (reciprocating motion) of the plunger 442 . As a result, the saw blade 443 attached to the plunger 442 is reciprocatingly driven to cut the object.

Next, referring to FIG. 19, the control system of motor 417 will be described. A display portion 473 is provided in the housing 412 described above. The display unit 473 displays the set target rotation speed. A stator 418 of the motor 417 has three coils U1, V1 and W1 corresponding to the U, V and W phases. As a sensor for detecting the rotational position of the rotor 419, it has three Hall elements H1 to H3 corresponding to the three-phase coils U1, V1 and W1. The three Hall elements H1 to H3 detect the strength of the magnetic field formed by the permanent magnets 422 provided on the rotor 419 and output detection signals.

Also provided is an inverter circuit 474 for controlling drive currents for the three coils U1, V1 and W1. Between the AC power supply 475 and the inverter circuit 474, a rectification circuit 476 for rectifying the AC power from the AC power supply 475 to DC, and a power factor correction circuit for boosting the rectified DC voltage and supplying it to the inverter circuit 474 are provided. 477 and are interposed. Power factor correction circuit 477 includes an integrated circuit 478 that outputs a control signal to transistor 497 . A noise countermeasure circuit 479 is provided between the AC power supply 475 and the rectifier circuit 476 to prevent noise generated in the inverter circuit 474 from being transmitted to the AC power supply 475 side.

The inverter circuit 474 is a three-phase full-bridge inverter circuit, and has two switching elements Tr1 and Tr2, two switching elements Tr3 and Tr4, and two switching elements Tr5 and Tr6 connected in series. Each of the switching elements Tr 1 to Tr 6 is connected to the positive and negative output terminals of the power factor correction circuit 477 . The three switching elements Tr1, Tr3, Tr5 connected to the positive side are on the high side, and the three switching elements Tr2, Tr4, Tr6 connected to the negative side are on the low side. One connection terminal of the U-phase coil U1 is connected between the two switching elements Tr1 and Tr2. One connection terminal of the V-phase coil V1 is connected between the two switching elements Tr3 and Tr4. One connection terminal of the W-phase coil W1 is connected between the two switching elements Tr5 and Tr6. The other connection terminals of the three coils U1, V1, W1 are connected to each other, and the coils U1, V1, W1 are star-connected.

For example, when a control signal is applied to the gates of the switching element Tr1 on the high side and the switching element Tr4 on the low side, currents are supplied to the U-phase and V-phase coils U1 and V1. The commutation operation for each coil U1, V1, W1 is controlled by adjusting the timing of the control signal supplied to each switching element. In this way, the inverter circuit 474 has a commutation function, and the motor 417 does not have a commutator attached to the output shaft 420 and does not have brushes that supply current to the commutator. That is, motor 417 is a brushless motor.

A motor control section 480 that controls the inverter circuit 474 is provided, and the motor control section 480 has a controller 481 . A control signal is sent from the controller 481 to the inverter circuit 474 via the control signal output circuit 482 . Detection signals from the Hall elements H1 to H3 are sent to the rotor position detection circuit 483 . A signal output from the rotor position detection circuit 483 is sent to the controller 481 and the motor rotation speed detection circuit 484 . A motor rotation speed detection circuit 484 calculates the rotation speed of the output shaft 420 of the motor 417, that is, the actual rotation speed. A signal output from the motor rotation speed detection circuit 484 is sent to the controller 481 . A motor current detection circuit 485 is provided to detect the current flowing through the motor 417 , and a signal output from the motor current detection circuit 485 is input to the controller 481 . A trigger switch detection circuit 486 is provided to detect ON/OFF of the trigger switch 471 , and a signal output from the trigger switch detection circuit 486 is input to the controller 481 .

The controller 481 has a microprocessor that calculates control signals to be output to the control signal output circuit 482, and a memory that stores programs, calculation formulas, and data used for controlling the rotation speed of the motor 417. FIG. The controller 481 controls the rotation, stop, rotation direction, and rotation speed of the motor 417 based on signals input from the tactile switch 468, rotation speed setting dial 472, and detection circuit, stored programs, arithmetic expressions, and data. do.

The number of rotations of the motor 417 is controlled by adjusting the voltages supplied to the three coils U1, V1, W1. Voltage control for the three coils U1, V1, W1 is performed by PWM (Pulse Width Modulation) control of the switching elements Tr1 to Tr6. That is, such voltage control is performed by adjusting the duty ratio of the ON signal applied to the gates of the switching elements Tr1 to Tr6 of the inverter circuit 474. FIG. The direction of rotation of the motor 417 is controlled by switching the directions of currents flowing through the three coils U1, V1, and W1. The inverter circuit 474, the rectifier circuit 476, the power factor improvement circuit 477 and the motor controller 480 are provided on the control board 487 shown in FIG. The control board 487 is provided inside the motor case 413 .

Next, the operation of jigsaw 400 will be described in more detail. After connecting the power cord 470 to the AC power supply 475 , the operator grasps the handle 415 and presses the base 463 against the object 411 . When an operating force is applied (turned on) to the trigger 469, electric power is supplied to the motor 417 and the output shaft 420 rotates. Torque of output shaft 420 is transmitted to rotating member 426 via pinion gear 428 and gear 427 , and rotating member 426 rotates around support shaft 425 . Also, the plate 437 rotates together with the rotating member 426 . When the operating force is no longer applied to the trigger 469 (turned off), the rotation of the output shaft 420 stops. The motor 417 can switch the rotation direction of the output shaft 420 between a first rotation direction and a second rotation direction. The rotation direction of the output shaft 420 of the motor 417 can be switched by operating the switching lever 459 . The motor control unit 480 switches the rotation direction of the output shaft 420 of the motor 417 depending on whether the switching lever 459 is operated and the tactile switch 468 is turned on or off.

When the switching lever 459 is at the operating position D1 or the operating position D2, the output shaft 420 rotates in the first rotation direction, and the rotating member 426 rotates in a predetermined direction. Note that the rotation direction of the rotating member 426 can be arbitrarily switched by the user's operation.

When the plate 437 rotates together with the rotating member 426 , the connecting piece 441 revolves around the support shaft 425 regardless of the rotating direction of the rotating member 426 . Also, the connecting piece 441 reciprocates between two rails (not shown). In this way, the revolving force of the support shaft 439 is transmitted to the contact member 444 via the connecting piece 441, and the plunger 442 reciprocates, ie ascends and descends, in the direction along the centerline C1. The saw blade 443 then moves up and down together with the plunger 442 to cut the object 411 . Thus, jigsaw 400 converts the rotational force of output shaft 420 of motor 417 into reciprocating force of plunger 442 and saw blade 443 . The support shaft 439 , the connecting piece 441 and the contact member 444 constitute a motion converting mechanism 496 .

By the way, in the jigsaw 400 having such a configuration, when the plunger 442 is driven by the rotation of the motor 417, the support shaft 439 and the connecting piece 441 move vertically and horizontally. Therefore, when the rotation of the motor 417 stops, the support shaft 439 and the connecting piece 441 may stop at a position displaced from the split surface of the housing 412 . In this situation, there is a possibility that the support shaft 439 and the connecting piece 441 will get in the way when the housing is disassembled for maintenance.

Therefore, in this embodiment, as shown in FIG. 19, the control board 487 is provided with the wireless communication section 23A. The wireless communication unit 23A is a block equivalent to the wireless communication circuit 23 of the battery pack 100B described above. That is, the wireless communication unit 23A is a circuit having a wireless antenna (see FIG. 4) and a predetermined wireless interface, and transmits and receives wireless signals through the wireless antenna to communicate with the mobile terminal (external device). communicate.

When the wireless communication unit 23A receives a transition signal to the maintenance mode from an external device, the received transition signal is transmitted from the wireless communication unit 23A to the controller 481, and the operation mode of the controller 481 transitions to the maintenance mode. do.

In the maintenance mode, similarly to the embodiment of the nailing machine described above, each time the trigger 469 is pulled by the operator, the motor 417 rotates a predetermined amount and then stops, and the plunger 442 slightly moves. .

Since the jigsaw 400 does not have a magazine unlike the nailing machine described above, the controller 481 may be configured so as not to determine the transition condition to the maintenance mode (detection of the remaining amount of nails, etc.). Alternatively, for example, removal of the saw blade 443 may be used as a transition condition to the maintenance mode. As a configuration example in this case, the plunger 442 may be provided with a saw blade detection sensor, and the controller 481 may determine whether or not the transition condition to the maintenance mode is satisfied according to the detection result of the saw blade detection sensor.

According to the jigsaw 400 having the configuration described above, the following effects can be obtained.

In jigsaw 400 of the present embodiment, plunger 442 can be stopped at an arbitrary position by the operator pulling trigger 469 multiple times in the maintenance mode. Therefore, according to the jigsaw 400 of the present embodiment, the support shaft 439 and the connecting piece 441 can be stopped at a position that does not get in the way, and workability during maintenance is improved.

In general, when replacing the saw blade 443 attached to the plunger 442, it is easier to replace the plunger 442 when the plunger 442 is positioned near the bottom dead center. According to the jigsaw 400 of the present embodiment, the plunger 442 can be arranged near the bottom dead center in the maintenance mode, which makes it easier to replace the saw blade 443 .

As described in detail above, the working machine of the present disclosure includes a motor, a working unit driven by the motor, and a control circuit that controls the operation of the motor and can communicate with an external device, The control circuit has a work mode in which the motor is operated so that the work section performs a series of work operations on the mating material, and a maintenance mode in which the motor is operated so that the work section does not perform the series of work operations. and a configuration for switching between operation modes by communication with an external device.

According to the work machine having the above configuration, it is possible to improve the convenience of the person performing maintenance.

It should be noted that the above-described embodiments and modifications are only part of specific examples to which the present invention is applied, and can be implemented in various other forms. For example, in the above description, examples of the work machine include a nail driver and a jigsaw, but the work machine is not limited to these, and has an operation mode capable of switching between a normal mode for work and another mode for maintenance. The configuration of the present disclosure can be applied to various work machines.

Another example of the work machine is a device called a "hammer" which is equipped with a tapered tip tool and which is provided so as to be able to reciprocate in the axial direction. equipment) used for dismantling of materials). When applied to a hammer, it is possible to enhance the convenience when switching from the normal mode for working to the maintenance mode when replacing the tip tool from the working machine main body of the hammer.

DESCRIPTION OF SYMBOLS 100... Driving machine (working machine), 100A... Electric nailer, 100B... Battery pack (battery pack), 10... First control part (control circuit), 13... Trigger switch (operation part), 14... Push switch , 14L... push lever, 19... electric motor (motor), 20... second control section (control circuit), 23, 23A... wireless communication circuit (wireless communication section), 30... control device (external device), 35... display Parts 111...Housing (body part) 112...Blowing part (working part) 113...Magazine (holding part, working part) 125...Stopper 126...Plunger (working part) 136...Coil spring (biasing part), 138... Plunger damper (restriction part), 400... Jigsaw (working machine), W1... Work material to be driven (counterpart material)

Claims (12)

1. a motor;
   a working part driven by the motor;
   a control circuit that controls the operation of the motor and can communicate with an external device;
   The control circuit operates a work mode in which the motor is operated so that the work section performs a series of work operations on the mating material, and a work mode in which the work section operates the motor so that the work section does not perform the series of work operations. Switching operation modes including maintenance mode and, by communication with the external device,
   working machine.
2. The control circuit controls the operation of the motor so that the work unit is continuously driven to perform the work operation in the work mode, and the work unit is intermittently driven in the maintenance mode. , The working machine according to claim 1.
3. An operation unit that outputs an ON/OFF signal by user operation,
   The control circuit is
   In the work mode, when the ON signal is output, the motor is continuously operated until the work operation is completed;
   In the maintenance mode, the motor is operated when the ON signal is output, and the operation of the motor is stopped before the work operation is completed.
   The working machine according to claim 2.
4. The working part includes a striking part that is movable along a first direction and that strikes the fastener by moving to one side of the first direction; a biasing part that biases the striking part; a restricting portion that restricts the movement of the striking portion to the one side;
   The hitting part moves between a first position and a second position in the first direction based on the operation of the motor and the biasing force of the biasing part, and the biasing part moves when it is at the first position. is movable to the one side by receiving the biasing force of the portion, and when it is in the second position, it is in contact with the restricting portion and cannot move to the one side;
   The control circuit controls the operation of the motor so that the striking part can be stopped at the first position in the work mode, and the striking part can be stopped at the second position in the maintenance mode.
   The working machine according to claim 3.
5. The working part has a holding part that holds the fastener so as to be hit by the hitting part,
   When the control circuit receives a switching signal for switching the operation mode from the work mode to the maintenance mode from the external device, if the holding section holds the fastener, the maintenance mode is switched to the maintenance mode. do not switch to mode,
   The working machine according to claim 4.
6. When the control circuit receives a switching signal for switching the operation mode from the work mode to the maintenance mode from the external device, the control circuit switches the operation mode to the maintenance mode when the work unit is in a permissible state allowing mode switching. switch the
   The work machine according to any one of claims 1 to 5.
7. The control circuit transmits to the external device a display signal for causing the external device to display whether the working unit is in the allowable state.
   The working machine according to claim 6.
8. wherein the control circuit switches the operation mode by wireless communication with the external device;
   The working machine according to any one of claims 1 to 7.
9. a body portion having the motor and the working portion;
   a battery pack that supplies power to the motor;
   The control circuit includes a wireless communication unit that performs wireless communication with the external device,
   The wireless communication unit is provided in the battery pack,
   The work machine according to any one of claims 1 to 8.
10. The external device according to any one of claims 1 to 9,
    A program for functioning as a communication device that communicates with the work machine.
11. a motor;
    a motion conversion mechanism that reciprocates the tip tool by receiving the rotational motion of the motor when the motor is driven;
    an operating unit that is turned on and off by an operator;
    a control circuit that controls the driving of the motor based on the operation of the operation unit and can communicate with an external device;
    The control circuit is
    a work mode in which the motor is driven when the operation unit is turned on, and the motor continues to operate until the operation unit is turned off;
    a maintenance mode in which the motor is driven when the operation unit is turned on, and the motor is stopped when a predetermined condition is satisfied even if the operation unit is not turned off;
    by communicating with the external device,
    working machine.
12. the predetermined condition is that the motor has rotated a predetermined amount;
    The working machine according to claim 11.

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