JP2008161966A - Driving work tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique effective for responding to driving shortage and excessive driving of a driving material, in a driving work tool for performing driving work of the driving material with respect to a processed material via an operating member and having a configuration capable of changing the length of the driving material. <P>SOLUTION: This nail driving tool 1 as the driving work tool is provided with a nail length detecting part arranged outside a housing of a magazine 5 and detecting information on the length of nails n stored inside the housing via the housing without contacting with the nails n. Based on the information detected by the nail length detecting part, variable control of the force to strike the nails n is performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a driving tool for performing a driving work of a driving material on a workpiece.

Conventionally, Patent Document 1 below discloses a tucker that drives a driving driver using a motor or the like as a driving source as an example of a driving tool, and drives a staple as a driving material onto a workpiece. . This tucker has a mechanism for detecting whether or not staples are stored in a magazine or the like (presence / absence of staples) in order to prevent idling, but the length of the driving material stored in the magazine is changed according to the application. There is a demand for a driving tool having a possible configuration to cope with insufficient driving or excessive driving of the driving material.
JP-A-8-72013

  Therefore, the present invention has been made in view of the above points, and is a driving work tool configured to perform a driving work of a driving material through a working member and to change the length of the driving material. Therefore, an object of the present invention is to provide an effective technique for coping with insufficient driving or excessive driving of the driving material.

  In order to achieve the above object, the invention described in each claim is configured. In the present invention, typically, an operation member that applies a driving force to the driving material, such as a nail driver or a tucker, is linearly operated, so that the workpiece is driven by the driving material. It is a technique that can be applied to various tools to be performed.

The driving tool according to the present invention is a driving tool for driving a workpiece into the workpiece, and includes at least a magazine, an impact mechanism, a detection sensor, and a control unit.
The magazine of the present invention is configured to have a function capable of accommodating driving materials having different lengths in the housing. Therefore, it is possible to accommodate a relatively long driving material in the magazine housing or a relatively short driving material in the magazine housing depending on the application.
The striking mechanism of the present invention is configured as a mechanism for striking a driving material sent from a magazine to a striking position. By this striking mechanism, the driving material is driven into the workpiece.
This striking mechanism is configured using a working part material that operates linearly in the driving direction from the standby position to the striking position, an electric motor that drives the working member, high-pressure air, high-pressure gas, and the like. As the driving material to be driven into the workpiece, a straight rod having a sharp tip and having a head with or without a head, and further a U-shaped staple or the like is used. be able to. In the present invention, this driving material to be driven into the workpiece can be used as one component of the driving tool.
The detection sensor of the present invention is configured as a sensor that is disposed outside the housing of the magazine and detects information on the length of the driving material accommodated in the housing without contact with the driving material through the housing. Is done. Regarding the arrangement of the detection sensors, the detection sensor may be attached to the outer surface of the magazine housing, or the detection sensor may be attached to the tool body in a non-contact state with the magazine housing. There may be. As this detection sensor, an electric field is typically generated by connection with an external electrode, and a non-contact type electric field sensor for the purpose of detecting an object in the electric field can be used. The “information regarding the length of the driving material” herein may be information indicating the absolute value of the length of the driving material, or may be relative information of the driving material with respect to a preset reference length. There may be. Such a non-contact type electric field sensor is effective for simply detecting the length of the driving material without the sensor itself interfering with the driving material.
The control unit of the present invention has a function of controlling the striking mechanism based on information detected by the detection sensor, thereby variably controlling the striking force of the driving material.

By the way, in the driving tool having the above-described configuration in which the length of the driving material to be accommodated in the magazine can be changed according to the application, in order to suppress the driving shortage and excessive driving, the driver performs according to the length of the driving material. It is necessary to variably control the striking force. Therefore, the driving tool according to the present invention includes the detection sensor and the control unit.
According to such a configuration, the striking force by the driver can be changed according to the length of the driving material accommodated in the housing, so that the appropriate striking force corresponding to the actual length of the driving material can be obtained. The driving work can be performed. Thereby, it becomes possible to eliminate the shortage of the driving material and excessive driving. Further, by performing the driving work with an appropriate hitting force, it is possible to suppress energy loss of the hitting mechanism. In addition, it is necessary to provide an installation area for the detection sensor in the housing by adopting a configuration in which a detection sensor for detecting information related to the length of the driving material accommodated in the housing is disposed outside the magazine housing. There is no rational.

  In a further aspect of the driving tool according to the present invention, the detection sensor is configured to be attached to the outer surface of the magazine housing. This provides a driving tool in which the detection sensor is integrated with the magazine.

In a further form of the driving tool according to the present invention, the hitting mechanism includes an electric motor and a pair of drive wheels formed in a columnar shape and rotatable on both sides of the operating member by the electric motor. Further, the drive mechanism is configured such that the operation member is sandwiched from both sides by the outer peripheral surfaces of the pair of drive wheels by energizing the solenoid, and thereby the operation member is operated via the pair of drive wheels in a rotating state. The solenoid referred to here typically has a movable iron core (plunger), which is a ferromagnetic material, and a fixed iron core as a magnetic core, and an insulated copper wire is wound around a bobbin formed of an insulating material to generate current. It has a coil that generates magnetism by flowing it, and the movable iron core is attracted to the fixed iron core by energizing the coil and strokes linearly.
In addition, when the control unit determines that the length of the driving material accommodated in the housing is less than a preset reference length based on the information detected by the detection sensor, The electric motor is rotationally controlled at the first rotational speed in the forward rotation direction in a state where the operation member is sandwiched from both sides by the outer peripheral surfaces of the pair of drive wheels by energization. On the other hand, when the control unit determines that the length of the driving material accommodated in the housing exceeds the reference length based on the information detected by the detection sensor, the control member is operated by energizing the solenoid. The electric motor is rotationally controlled at a second rotational speed higher than the first rotational speed in the forward rotational direction while being sandwiched from both sides by the outer peripheral surfaces of the pair of drive wheels. It is set as the structure which raises.
According to such a configuration, the length of the driving material is determined using the detection sensor disposed outside the housing of the magazine, and the rotational speed of the electric motor is controlled based on the determination result. A driving tool is provided.

According to a further aspect of the driving tool according to the present invention, an operation unit that can be manually operated by the operator is further provided. The operation unit is typically configured using push buttons and slide switches. Then, when the operation unit is manually operated, the control unit increases the suction force of the movable iron core in the solenoid to increase the force for sandwiching the operation member before the manual operation is performed, and thereby the operation member It is set as the structure which raises the striking force of the driving material by.
According to such a configuration, the hammering force of the driving member by the actuating member can be increased by manual operation of the operation unit, regardless of the length of the driving member detected by the detection sensor. Such a configuration is effective, for example, when adjusting the striking force of the driving member by the actuating member according to the type of workpiece.

  According to the present invention, in a driving tool configured to perform a driving work of a driving material on a workpiece through an actuating member and to change the length of the driving material, the driving material is insufficiently driven or excessively driven. It became possible to deal with.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, a rechargeable nail driving tool will be described as an example of the “driving work tool” in the present invention. FIG. 1 is a side view showing the entire internal structure of a nail driving tool 1 according to an embodiment of the present invention. Moreover, FIG. 2 is the figure which looked at the internal structure of the nailing tool 1 of one embodiment of this invention from the arrow A direction in FIG. FIG. 3 is a cross-sectional view taken along the line B-B in FIG. 2, and is a cross-sectional view showing a state in which the transmission portion 20 b bites between the left and right drive wheels 30.

  As shown in FIGS. 1 and 2, the nail driving tool 1 of the present embodiment is roughly divided into a main body portion 2 and a handle portion 3. The handle portion 3 is integrally provided so as to protrude sideways from the side portion of the main body portion 2. A trigger type trigger 4 is provided at the base of the handle portion 3. Further, a magazine 5 in which a large number of driving materials (illustrated by nails n to n in the present embodiment) are accommodated is provided between the main body 2 and the handle 3. The magazine 5 is configured to have a function capable of accommodating driving materials having different lengths in the housing. Therefore, it is possible to accommodate a relatively long driving material in the housing of the magazine 5 or to store a relatively short driving material in the housing of the magazine 5 depending on the application. The magazine 5 here corresponds to the “magazine” in the present invention. The nail driving tool 1 of this embodiment has a mechanism for driving a nail n as a “driving material” according to the present invention to a work material W as a “working material” according to the present invention. The other configurations of the handle portion 3 and the magazine 5 are the same as those of the conventional configuration, and no particular changes are required in the present embodiment, so detailed description and illustration thereof will be omitted.

1 and 2, the front end portion of the main body portion 2 is shown facing the workpiece W. For this reason, the downward direction in FIGS. 1 and 2 is the driving direction of the nail n, which is the hitting direction of the nail n.
The main body 2 includes a main body housing 10 made of a resin and having a split structure, which is formed in a substantially cylindrical shape. The handle portion 3 is formed integrally with the side portion of the main body housing 10. A rechargeable battery pack 6 is attached to the tip of the handle portion 3. The electric motor 11 using the battery pack 6 as a power source is activated as a driving source for the nail driving tool 1. The electric motor 11 here corresponds to the “electric motor” in the present invention.

  A drive mechanism 10a for driving the driver support base 20 by transmitting the driving force of the electric motor 11 to the driver support base 20 and hitting the nail n is built in the main body housing 10. Yes. The drive mechanism 10a includes an electric motor 11, a drive pulley 12, driven pulleys 13 and 14, an auxiliary pulley 15, a drive belt 16, and the like. The driving mechanism 10a and the driver support base 20 driven by the driving mechanism 10a here are mechanisms for hitting the nail n sent out from the magazine 5, and constitute the “striking mechanism” in the present invention.

  In the drive mechanism 10a, the electric motor 11 is built in the rear part (upper part in FIG. 1) of the main body housing 10. A drive pulley 12 is attached to the output shaft of the electric motor 11. Corresponding to the drive pulley 12, two driven pulleys 13, 14 and one auxiliary pulley 15 are arranged at approximately the center in the longitudinal direction of the main body housing 10. The two driven pulleys 13 and 14 are arranged symmetrically with respect to the driving direction. As shown in FIG. 2, one drive belt 16 is stretched between a drive pulley 12 attached to the output shaft of the electric motor 11, left and right driven pulleys 13 and 14, and an auxiliary pulley 15. When the electric motor 11 is activated in the striking direction (also referred to as “forward rotation direction”), the left and right driven pulleys 13 and 14 rotate in opposite directions via the drive belt 16, and accordingly, a pair of left and right drive wheels (“ (Also referred to as “flywheel”) 30 and 30 are configured to rotate simultaneously at the same rotational speed in opposite directions. The pair of left and right drive wheels 30, 30 here corresponds to “a pair of drive wheels” in the present invention.

  At approximately the center of the main body housing 10, a driver support base 20 is provided so as to be movable along the driving direction via a slide support mechanism (not shown). A driver 21 is supported at the tip of the driver support base 20 (the lower surface in FIG. 1). The driver 21 is configured as a long member extending long toward the other side (downward in FIG. 1). A driver guide 25 is attached to the tip of the main body housing 10. The driver guide 25 is provided with a driving hole 25a through which the driver 21 can be inserted, penetrating from the upper end to the lower end (tip). The tip of the driver 21 reaches the driving hole 25a. The driver guide 25 is connected to the supply side tip of the magazine 5. The magazine 5 includes a pusher plate 5a for pushing the nails n to n in the supply direction (leftward in FIG. 1). The nails n are supplied one by one into the driving hole 25a of the driver guide 25 by the pusher plate 5a. The driver guide 25 is provided with a door latch 28 for opening the driving hole 25a. In the present embodiment, the driver 21 and the driver support base 20 that supports the driver 21 may be collectively referred to as a “driver”. The driver 21 and the driver support base 20 constitute an “operating member” in the present invention.

  The driver guide 25 is provided with a contact arm (also referred to as a “contact lever”) 26 for switching between enabling and disabling of the pulling operation of the trigger 4. The contact arm 26 is supported so as to be movable in the driving direction with respect to the driver guide 25 and is spring-biased in a direction in which a lower end portion of the contact arm 26 protrudes from the tip of the driver guide 25. In order to drive the nail n into the workpiece W using the nail driving tool 1, the contact arm 26 is first brought into contact with the workpiece W, and then the nail driving tool 1 is moved to move the driver guide 25. It is necessary to displace the contact arm 26 upward relative to the driver guide 25 by bringing the tip end closer to the workpiece W. When the contact arm 26 is moved up against the spring biasing force, a limit switch 27 (a switch corresponding to “contact arm switch SW1” described later) attached in the main body housing 10 is turned on, whereby the electric motor 11 is turned on. to start. These controls are performed by the control device 100 that is also mounted in the main body housing 10. Although details will be described later, in the control device 100, other detection signals such as an ON operation signal of the trigger 4 and an ON signal of the limit switch 27 are input, and the operation of the electric motor 11 and the solenoid 42, and the like are based on this. Is controlled.

  As shown in FIG. 3, the driver support base 20 includes a transmission portion 20b having a V-shaped cross section. Transmission surfaces 20a and 20a are provided on the left and right side portions in the driving direction of the transmission portion 20b. Both the transmission surfaces 20a, 20a are arranged in a V shape to constitute a transmission portion 20b having a V-shaped cross section. Cylindrical drive wheels 30 and 30 are arranged on the left and right sides of the transmission portion 20b in the driving direction, and the outer peripheral surface 30a of each drive wheel 30 is configured to face the transmission surface 20a of the transmission portion 20b. When the transmission portion 20b is sandwiched between the drive wheels 30 and 30, the outer peripheral surface 30a of the drive wheel 30 comes into contact with both the transmission surfaces 20a and 20a. Both drive wheels 30 and 30 are supported coaxially with the driven pulleys 13 and 14 through a support shaft 31 so as to be rotatable integrally therewith. When the driven pulleys 13 and 14 rotate, both drive wheels 30 and 30 rotate.

  The support shafts 31, 31 that rotatably support the left and right drive wheels 30, 30 are respectively supported by bearings 32 to 32 and arranged in a V shape. Each of the bearings 32 to 32 is attached to a holder 17 fixed to the main body housing 10. The outer peripheral surfaces 30a, 30a of both the drive wheels 30, 30 are configured to be parallel to the axis (rotation axis) of the support shaft 31, respectively. Both the support shafts 31, 31 are arranged at the same inclination angle as the transmission surface 20a of the driver support base 20, and are therefore arranged in parallel to the transmission surface 20a. For this reason, the outer peripheral surfaces 30a, 30a of both drive wheels 30, 30 are in contact with the transmission surface 20a in a line-contact state.

  By rotating the outer peripheral surfaces 30a, 30a of the drive wheels 30, 30 in opposite directions in contact with the transmission surface 20a of the driver support base 20, the driver support base 20 is driven in the nail n driving direction ( It moves downward (in FIG. 1). As the driver support base 20 moves in the driving direction, the driver 21 integrally moves from the predetermined standby position (also referred to as “standby area”, “initial position” or “initial area”) to the hit position (“hitting area”). , Which is also referred to as “driving position” or “driving area”), and is supplied linearly in the driving hole 25a of the driver guide 25 when the driving position is reached in the moving process. The head of the nail n is struck by the tip of the driver 21 to apply driving force, and is driven out from the tip of the driver guide 25.

  Here, the driver support base 20 is pressed by the pressing member 41 in a direction (rightward in FIG. 1 and upward in FIG. 3) that causes the transmitting portion 20 b to bite between the two drive wheels 30 during the driving operation. In this embodiment, two rollers are used for the pressing member 41. Hereinafter, the pressing mechanism 40 including the pressing member 41 will be described. Details of the pressing mechanism 40 are shown in FIGS. FIG. 4 is a side view of the pressing mechanism 40 of the present embodiment, and shows a state when the pressing member 41 is not pressed by the driver support base 20, and FIG. 5 shows the state of the present embodiment. FIG. 4 is a side view of the pressing mechanism 40 and shows a state when the pressing member 41 is pressed by the driver support base 20.

  As shown in FIGS. 4 and 5, the pressing mechanism 40 includes a push-pull type of a solenoid (also referred to as “electromagnetic actuator”) 42 as a drive source. As will be described in detail later, this pressing mechanism 40 normally presses the driver support base 20 between the outer peripheral surfaces 30a and 30a of the pair of drive wheels 30 and 30 by energizing the solenoid 42 on the pull side. The mechanism is set to a state (also referred to as a “pressed state”). In the pressing mechanism 40, the solenoid 42 is disposed at the front portion in the main body housing 10. The output shaft 42a of the solenoid 42 is biased to the protruding side by a compression spring 42b. When the solenoid 42 is energized in the driving operation, the output shaft 42a moves to the pulling side against the compression spring 42b. When the energization to the solenoid 42 is interrupted, the output shaft 42a is returned to the protruding side by the compression spring 42b. The solenoid 42 is configured as a known DC solenoid, and has a movable iron core (plunger), which is a ferromagnetic material, and a fixed iron core as a magnetic core, and an insulating copper wire is wound around a bobbin formed of an insulating material. It has a coil that generates magnetism by flowing a current, and the movable iron core is attracted to the fixed iron core by energizing the coil and strokes linearly. The solenoid 42 here corresponds to a “solenoid” in the present invention.

  One end of an operating arm 44 is connected to the tip of the output shaft 42a of the solenoid 42 via a bracket 43 so as to be relatively rotatable. The bracket 43 is formed with a connecting hole 43b that is long in a direction perpendicular to the extending and contracting direction of the output shaft 42a. The operating arm 44 is connected to the bracket 43 through a connecting shaft 43a inserted through the connecting hole 43b. For this reason, one end side of the operating arm 44 is attached to the bracket 43 in a state in which the rotation center is displaceable within a range in which the connection shaft 43a that can rotate through the connection shaft 43a and can move within the connection hole 43b. It is connected.

  The operating arm 44 is bent in an L shape and extends rearward (upward in FIGS. 1, 4, and 5). One end side of the restriction arm 46 is rotatably connected to the other end side of the operating arm 44 via a moving support shaft 45. The restriction arm 46 is rotatably supported by the main body housing 10 via a fixed support shaft 47. Further, the other end side of the operating arm 44 is rotatably connected to the pressing arm 50 via the moving support shaft 48. The pressing arm 50 is rotatably supported by the main body housing 10 via a fixed support shaft 49. The pressing member (pressing roller) 41 is rotatably supported on the rotating distal end side (the upper end side in FIGS. 1, 4, and 5) of the pressing arm 50.

  According to the pressing mechanism 40 configured as described above, in the standby state (also referred to as “initial state”) shown in FIGS. 1 and 4, the energization on the pull side to the solenoid 42 is cut off, and accordingly, the output shaft 42a. Is returned to the protruding side by a compression spring 42b. In this standby state, the base end side (the connecting shaft 43a side) of the operating arm 44 is displaced obliquely downward to the left in FIGS. 1 and 4, so that the restricting arm 46 is counterclockwise about the fixed support shaft 47. As a result, the pressing arm 50 tilts counterclockwise about the fixed support shaft 49, and as a result, the pressing member 41 is separated from the back surface of the driver support base 20 (floating state). In this state, the pressing member 41 is separated from the back surface of the driver support base 20 to come into contact with the pressing member 41 and the driver support base 20, and the driver support base 20 and the left and right drive wheels 30 are slightly clockwise from a straight line. The transmission state in which the driving force of the electric motor 11 that moves more is transmitted to the driver support base 20 is released.

On the other hand, when energized to the pull side of the solenoid 42, the output shaft 42a operates to the drawing side against the compression spring 42b. Then, as shown in FIG. 5, the proximal end side of the operating arm 44 is displaced obliquely upward to the right, so that the restricting arm 46 tilts clockwise around the fixed support shaft 47 and the pressing arm 50 is fixed to the fixed support shaft 49. As a result, the pressing member 41 is pressed against the back surface of the driver support base 20. Since the pressing member 41 is pressed against the back surface of the driver support base 20, the transmission portion 20 b of the driver support base 20 is in a state where it bites between the left and right drive wheels 30.
In addition, in this state shown in FIG. 5, the fixed support shaft 47 of the restriction arm 46 is a moving support shaft that is a connection point between the moving arm 45 that is the connection point with the operation arm 44 and the pressing arm 50 of the operation arm 44. Since it passes slightly in the clockwise direction from the straight line connecting 48 and the fixed support shaft 47 is restricted from moving in the clockwise direction, it cannot move in the clockwise direction from the current position. For this reason, the pressing arm 50 is locked in a state in which the pressing member 41 is pressed against the back surface of the driver support base 20, thereby firmly maintaining the biting state between the drive wheels 30 and 30 of the transmission portion 20 b. This state is a pressing state in which the pressing member 41 is in contact with the back surface of the driver support base 20, and is a transmission state in which the driving force of the electric motor 11 is transmitted to the driver support base 20.

  In this way, the pressing mechanism 40 presses the pressing member 41 against the back surface of the driver support base 20, and this pressing state is locked by the toggle mechanism constituted by the fixed support shaft 47 and the moving support shafts 45 and 48. The portion 20b has a function of maintaining the biting state between the drive wheels 30 and 30. Since the transmission portion 20b is firmly inserted between the drive wheels 30 and 30, the driving power of the driver support base 20 can be efficiently driven without causing slippage due to large friction of the rotational power of the drive wheels 30 and 30. It is transmitted as a driving force for moving to.

  Next, on the rear part (upper part in FIG. 1) of the main body housing 10 is a winding for returning the driver support 20 and the driver 21 that have reached the lower moving end after the driving of the nail n to the standby position. A take-off mechanism is provided. In the present embodiment, the winding mechanism includes winding wheels 60 and 60, a return rubber 70, a mainspring spring 63, and the like provided on the left and right sides with respect to the driving direction. This winding mechanism constitutes a mechanism for applying (urging) a winding force toward the standby position in order to return the driver 21 to the standby position after driving the nail n.

  6 to 9 are referred to for the structure related to the take-up wheels 60 and 60. Here, FIG. 6 shows a side view of the winding wheel 60 for winding the return rubber 70 of the present embodiment. FIG. 7 is a cross-sectional view of the winding wheel 60 of the present embodiment, and shows a fixed state of one end side 70a of the return rubber 70. FIG. 8 is a plan view of the driver support base 20 of the present embodiment, and shows a fixed state of the other end side 70b of the return rubber 70, and FIG. 9 shows the driver support of the present embodiment. It is a side view of the base 20, Comprising: The fixed state of the other end side 70b of the return rubber 70 is shown.

  As shown in FIG. 6, the two winding wheels 60, 60 are fixed on a winding shaft 62 that is rotatably supported by the main body housing 10 via bearings 61, 61. A mainspring spring 63 is interposed between the winding shaft 62 and the main body housing 10. The winding shaft 62 is urged in the winding direction by the mainspring spring 63, so that both winding wheels 60, 60 are urged in the winding direction (clockwise direction in FIG. 6). As shown in FIG. 7, one end side 70 a of a return rubber 70 having string-like elasticity is coupled to both the winding wheels 60, 60. Both the winding wheels 60, 60 each have a split structure in the rotational axis direction, and one end side 70a of the return rubber 70 is fitted into a groove 60b provided in the split surface 60a, And it couple | bonds in the state pinched | interposed between the two split surfaces 60a and 60a. A plurality of protrusions 60c to 60c are provided in the groove 60b. The one end side 70a of the return rubber 70 is prevented from coming out of the groove portion 60b by being caught by the plurality of protrusions 60c to 60c, whereby the one end side 70a of the return rubber 70 is more firmly coupled to the winding wheel 60. Has been. As shown in FIG. 7, the length of the return rubber 70 is set so that the return rubber 70 is wound around the winding wheel 60 one or more times when it is not operated (in a wound state).

  As shown in FIGS. 8 and 9, when the return rubbers 70 and 70 are coupled to the driver support base 20, the other end sides 70 b of the two return rubbers 70 and 70 are coupled to the side surfaces of the driver support base 20. ing. At this time, the other end side 70b of both return rubbers 70 and 70 is each configured as a spherical engaging portion. On the other hand, engagement holes 20 c and 20 c are provided on both side surfaces of the driver support base 20. The other end side of the return rubber 70 is coupled to the driver support base 20 in a state where the spherical engagement portion (the other end side 70b) is engaged with the engagement hole 20c in the return direction and is firmly retained. .

(Configuration of control device 100)
Next, a specific configuration of the control device 100 will be described with reference to FIG. FIG. 10 shows a system configuration of the control device 100 of the present embodiment.

  As shown in FIG. 10, in the control device 100 of the present embodiment, various input / output devices are connected to a CPU (Central Processing Unit) 110. Specifically, a contact arm switch SW1, a trigger switch SW2, a turbo switch SW3, a battery voltage detection unit 111, and a nail length detection unit 112 are connected to the input side of the CPU 110, and a solenoid control unit 114, a motor is connected to the output side of the CPU 110. The control unit 115 and the display unit 120 are connected.

  The contact arm switch SW1 is configured as a switch that is turned on when the contact arm 26 is pressed against the workpiece W. The trigger switch SW2 is configured as a switch that is turned on when the trigger 4 is pulled. The turbo switch SW3 is configured as a switch that is manually operated by an operator so as to perform control for increasing the suction force of the movable iron core in the solenoid 42 by the solenoid control unit 114. The turbo switch SW3 is typically configured by using push-type buttons and slide-type switches, and is appropriately disposed at locations such as the main body 2 and the handle 3. By manually operating the turbo switch SW3, it is possible to increase the suction force of the movable iron core in the solenoid 42, thereby increasing the stroke of the movable iron core, and thereby through the left and right drive wheels 30,30. It becomes possible to increase the driving force of the electric motor 11 transmitted to the driver support base 20. The turbo switch SW3 here constitutes the “operation unit” in the present invention. The battery voltage detection unit 111 is configured as a mechanism for detecting the battery voltage of the battery in the battery pack 6. The nail length detection unit 112 is configured using a detection sensor that automatically detects the length of the nail accommodated in the magazine 5. The nail length detection unit 112 here constitutes the “detection sensor” in the present invention. The solenoid control unit 114 has a function of controlling the driving of the solenoid 42 of the pressing mechanism 40. The motor control unit 115 has a function of controlling driving of the electric motor 11. The display unit 120 is configured by a display body such as an LED that can display information on the battery of the battery pack 6.

(Control by control device 100)
Moreover, FIG. 11 is referred regarding the control by the control apparatus 100 shown in FIG. Here, FIG. 11 shows a control flowchart by the control device 100 of the present embodiment. The determination in the control is performed mainly by the CPU 110 in FIG. 10, and the drive mechanism 10a is controlled based on the determination result. The control device 100 here constitutes a “control unit” in the present invention.

  In the control shown in FIG. 11, first, the battery pack 6 having a battery mounted thereon is attached to the lower end of the handle portion 3, so that the initial setting is made in step S <b> 101, whereby the nail driving tool 1 is made operable. . Next, in step S102, it is determined whether or not the contact arm 26 is pressed against the workpiece W and the contact arm switch SW1 is turned on. If it is determined that the contact arm switch SW1 is in the on state (YES in step S102), the process proceeds to step S103, and if it is determined that the contact arm switch SW1 is not in the on state (in the case of NO in step S102). Executes step S102 again.

  In step S103, control is performed to detect the battery voltage by the battery voltage detector 111, and the battery voltage is subsequently determined in step S104. If the battery voltage is equal to or higher than the specified value V1 (YES in step S104), it is determined that the remaining battery level is sufficient, and the process proceeds to step S105. In step S105, information on the length of the nail accommodated in the magazine 5 is detected by the nail length detection unit 112, and subsequently, in step S106, based on the detection information by the nail length detection unit 112, It is determined whether or not the nail accommodated in the magazine 5 is longer than a reference length (for example, 51 mm). If the nail is longer than the reference length (in the case of YES at step S106), based on the determination that a nail longer than the reference length is used, the relay RY1 is set to the ON state by step S107, and step Proceed to S112. On the other hand, if the nail is less than the reference length (NO in step S106), the process proceeds directly to step S112. The reference length of the nail can be set to one or more depending on the type of nail that may be accommodated in the magazine 5.

  In step S104, if the battery voltage is less than the specified value V1, it is determined in step S108 whether or not the battery voltage is more than the specified value V2 (<V1). If the battery voltage is greater than or equal to the prescribed value V2 and less than the prescribed value V1 (in the case of YES in step S108), based on the determination that the driving operation is possible although the remaining battery level is low, step S109 Relay RY1 is set to an on state. Further, in step S110, after the fact that the remaining battery level is decreasing (remaining amount warning display) is output to the display unit 120, the process proceeds to step S112. On the other hand, if the battery voltage is less than the specified value V2 (NO in step S108), the battery is replaced in step S111 based on the determination that the remaining battery level is low or the battery is dead. The necessity (battery replacement display) is output to the display unit 120.

  In step S112, it is detected whether or not the turbo switch SW3 is in an on state manually operated. If it is detected that the turbo switch SW3 is in the ON state (YES in step S112), the relay RY3 is set to ON in step S113, and then the relay RY2 is set to ON in step S114. If it is detected that SW3 is in the OFF state (NO in step S112), relay RY2 is set to ON in step S114.

  In this step S114, when the nail accommodated in the magazine 5 is longer than the reference length and the turbo switch SW3 is in the on state, all the relays RY1, RY2, and RY3 are set to on. It becomes. With this setting, the motor controller 115 causes the motor controller 115 to set the rotational speed in the positive rotational direction of the electric motor 11 to a higher rotational speed (the rotational speed corresponding to the “first rotational speed” in the present invention) than the normal rotational speed. (Rotational speed corresponding to the “second rotational speed”), the kinetic energy of the drive wheels 30 and 30 is increased, and the suction force of the movable iron core in the solenoid 42 is increased by the solenoid control unit 114 to pull the output shaft 42a. The driving force of the electric motor 11 transmitted to the driver support base 20 via the left and right drive wheels 30 and 30 can be increased by increasing the stroke to the side and increasing the pinching force or pressing force of the driver support base 20. . Thereby, it is possible to control the nail driving force to the maximum (when the driving force is maximum).

  In step S114, when the nail accommodated in the magazine 5 is longer than the reference length and the turbo switch SW3 is in the OFF state, the relays RY1 and RY2 are set to ON. Become. With this setting, the motor controller 115 causes the motor controller 115 to set the rotational speed in the positive rotational direction of the electric motor 11 to a higher rotational speed (the rotational speed corresponding to the “first rotational speed” in the present invention) than the normal rotational speed. Rotational speed corresponding to the “second rotational speed”), the kinetic energy of the drive wheels 30 and 30 is increased, whereby the driving force of the nail is higher than usual and lower than the maximum driving force described above. It is possible to control.

  In step S114, when the nail accommodated in the magazine 5 is less than the reference length and the turbo switch SW3 is in the on state, the relays RY2 and RY3 are set to on. Become. With this setting, the solenoid control unit 114 increases the suction force of the movable iron core in the solenoid 42 to increase the stroke of the output shaft 42a toward the drawing side, and increases the pinching force or pressing force of the driver support base 20, thereby The driving force of the electric motor 11 transmitted to the driver support base 20 via the drive wheels 30 can be increased. This makes it possible to control the nail driving force to be higher than normal and lower than the aforementioned maximum driving force.

  In this step S114, when the nail accommodated in the magazine 5 is less than the reference length and the turbo switch SW3 is in the off state, only the relay RY2 is set to be on. . With this setting, the rotation speed in the normal rotation direction of the electric motor 11 is set to the normal state (normal time).

  In step S115, after step S114, it is determined whether or not the trigger 4 is pulled within a specified time (for example, 5 seconds) and the trigger switch SW2 is turned on. If it is determined that the trigger switch SW2 is turned on within the specified time (YES in step S115), the process proceeds to step S116. On the other hand, if it is determined in step S115 that the trigger switch SW2 has not been turned on within the specified time, the relays RY1, RY2, and RY3 are turned off in step S120, and the electric motor 11 is stopped. After detecting that the pressing of the contact arm 26 is released in S121 and the contact arm switch SW1 is turned off, the process returns to step S102.

  In step S116, the relay RY1 is turned off to turn off the electric motor 11, and in step S117, the solenoid 42 is pulled for a specified time (for example, 20 [ms]) to form a pressed state of the driver support base 20. Energize the side. That is, the solenoid 42 is operated in a direction (pressing direction) in which the output shaft 42a is pulled, whereby the operating arm 44 is displaced and the pressing arm 50 is tilted about the fixed support shaft 49 in the pressing direction. 41 and 41 are pressed against the back surface of the driver support base 20. This state is a state in which the pressing member 41 is pressed against the back surface of the driver support base 20, and thus the transmission portion 20 b of the driver support base 20 bites between the left and right drive wheels 30. Further, this pressed state is a connection point between the moving support shaft 45, which is a connection point of the operation arm 44, with the fixed support shaft 47 of the restriction arm 46 constituting the toggle mechanism, and the pressing arm 50 of the operation arm 44. Since it passes slightly in the clockwise direction from the straight line connecting the moving support shafts 48 and the fixed support shaft 47 is restricted from moving in the clockwise direction, it cannot move in the clockwise direction from the current position. It becomes. Therefore, the biting state between the left and right drive wheels 30 of the driver support base 20 is locked. Thus, when the transmission portion 20b of the driver support base 20 bites between the left and right drive wheels 30 with a predetermined pressing force, a large driving force is generated with respect to the driver support base 20 without causing slippage between them. .

  When the driver support base 20 moves in the driving direction with a large driving force, the driver 21 moves downward (advances) in the driving hole 25a of the driver guide 25 from the standby position shown in FIG. 13 toward the hitting position shown in FIG. Then, a driving force is applied by hitting the head of the nail n at the hitting position, whereby the nail n is driven into the workpiece W. That is, the electric motor 11 is controlled to rotate in the forward rotation direction and rotated in the forward rotation direction with the driver 21 sandwiched from both sides by the outer peripheral surfaces 30a, 30a of the pair of left and right drive wheels 30, 30. The pair of left and right drive wheels 30, 30 are rotated inwardly in the driving direction (in the direction of the white arrow in FIGS. 13 and 14) by the driving force of the driver, thereby driving the driver 21 with the rotational force of the driving wheels 30, 30. Drive in the direction. This driving control is a driving mode in which the driving force when the electric motor 11 rotates in the forward rotation direction is transmitted to the driver 21 by the driving mechanism 10a and the driver 21 is driven in the driving direction.

  Thereafter, in step S118, the relays RY2 and RY3 are set to OFF, and in step S119, the pressing of the contact arm 26 is released and the contact arm switch SW1 is turned off, and the pulling operation of the trigger 4 is released. Then, by detecting that the trigger switch SW2 is turned off, the series of processes is terminated.

  When a fixed time (for example, 20 ms) has elapsed from the pulling operation of the trigger 4 after completion of driving, the energization on the pull side to the solenoid 42 is cut off, and the output shaft 42a is returned to the protruding direction by the compression spring 42b. When the output shaft 42a is returned in the protruding direction, the operating arm 44 is displaced as shown in FIG. 4 so that the moving support shaft 45 comes off from the line connecting the fixed support shaft 47 and the moving support shaft 48, and the toggle mechanism is released. Further, the pressing arm 50 tilts counterclockwise about the fixed support shaft 49, and the pressing state of the pressing members 41, 41 against the back surface of the driver support base 20 is released.

  When the pressing of the pressing members 41, 41 against the driver support base 20 is released, the driver support base 20 is pulled upward by the return rubbers 70, 70 and returned to the standby position shown in FIG. The position of the driver support 20 at this standby position is regulated by a stopper 71. Note that the energization time (pressed state of the driver support base 20) to the solenoid 42 under the control of the control device 100 is set to about 20 ms, for example. Thereby, even when the pulling operation of the trigger 4 is maintained as it is after the driving is completed, the energization to the solenoid 42 is automatically cut off. For this reason, when moving to the next work, it is not necessary to quickly return the trigger 4, and good operability is ensured in this respect.

  Each of the return rubbers 70 and 70 has its own elastic force toward the contraction side, and is wound around a winding wheel 60 that is spring-biased toward the winding side. For this reason, even when the driver support base 20 is moved in the driving direction with a large stroke, the driver support base 20 can be surely returned to the standby position, and the back rubber 70, 70 can be prevented from being sag. Durability can be increased.

  The nail length detection unit 112 that detects information on the length of the nail accommodated in the magazine 5 generates an electric field when connected to an external electrode, and is intended for object detection within the electric field. A configuration using a non-contact type sensor, a so-called “electric field sensor” can be employed. As an example, an electric field sensor MC34940 manufactured by Freescale Semiconductor Japan, which can generate a low-level electric field with a single chip and detect proximity of the change in the electric field at low cost, can be used. Further, regarding the arrangement mode of the nail length detection unit 112, the nail length detection unit 112 may be attached to the outer surface of the housing of the magazine 5, or in a non-contact state with the housing of the magazine 5. The nail length detection unit 112 may be attached to the main body housing 10 side. For the configuration in which the nail length detection unit 112 is attached to the outer surface of the magazine 5, refer to FIG. 15. FIG. 15 schematically shows an arrangement mode of the nail length detection unit 112 in the nail driving tool 1 of the present embodiment. In the arrangement mode shown in FIG. 15, the nail length detection unit 112 is arranged on the tool front end side in each part of the outer surface of the housing of the magazine 5.

As described above, according to the nail driving tool 1 including the control device 100 having the above-described configuration, the striking force by the driver 21a can be changed according to the length of the nail accommodated in the housing of the magazine 5, This makes it possible to perform the driving operation with an appropriate striking force corresponding to the actual length of the nail. As a result, it is possible to eliminate the shortage and excessive driving of nails. Further, by performing the driving work with an appropriate striking force, it is possible to suppress the energy loss of the battery. Further, by adopting a configuration in which a nail length detection unit 112 that detects information on the length of the nail accommodated in the housing of the magazine 5 is disposed outside the housing of the magazine 5, There is no need to provide an installation area such as a detection sensor, which is reasonable. In particular, a structure in which the nail length detection unit 112 is integrated with the magazine 5 is realized by the configuration in which the nail length detection unit 112 is attached to the outer surface of the housing of the magazine 5.
Further, according to the nail driving tool 1 including the control device 100 having the above configuration, the nail length is determined using the nail length detection unit 112 disposed outside the housing of the magazine 5, and the determination result is obtained. Based on the above, an electrically driven structure for controlling the rotation speed of the electric motor 11 is realized.
Further, according to the nail driving tool 1 including the control device 100 having the above-described configuration, the driver 21a hits the nail regardless of the nail length detected by the nail length detection unit 112 by manual operation of the turbo switch SW3. You can increase your power. Such a configuration is effective, for example, when adjusting the striking force of the nail by the driver 21a according to the type of the workpiece W.

  In addition, although the control apparatus 100 having the above configuration described the case where the manual operation of the turbo switch SW3 is performed to increase the suction force of the movable iron core in the solenoid 42, the rotational speed of the electric motor 11 is manually operated by the turbo switch SW3. It may be configured to perform control to increase the rotational speed of the electric motor 11 by manual operation of the turbo switch SW3 and to increase the suction force of the movable iron core in the solenoid 42. Further, the turbo switch SW3 can be appropriately omitted as necessary.

(Configuration of control device 200)
Instead of the control device 100 having the above configuration, a control device having another configuration may be employed. Hereinafter, a specific configuration of the control device 200 according to another embodiment will be described with reference to FIG. FIG. 16 shows a system configuration of a control device 200 according to another embodiment. In FIG. 16, the same elements as those shown in FIG. 10 are denoted by the same reference numerals.

  As shown in FIG. 16, in the control device 200, various input / output devices are connected to a CPU (Central Processing Unit) 110 as in the case of the control device 100. Specifically, the contact arm switch SW1, the trigger switch SW2, and the battery voltage detection unit 111 having the above-described configuration are connected to the input side of the CPU 110, and the nail length input switch SW4 is further connected. Further, the solenoid control unit 114, the motor control unit 115, and the display unit 120 having the above-described configuration are connected to the output side of the CPU 110. The nail length input switch SW4 is configured as a switch that is manually operated by an operator when a nail longer than a reference length (for example, a length of 51 mm or more) is accommodated in the magazine 5. Therefore, when the nail length input switch SW4 is in the on state, it is determined that a nail longer than the reference length is used, while when the nail length input switch SW4 is in the off state, It is determined that a nail shorter than the reference length is used. The nail length input switch SW4 is typically configured by using push-type buttons and slide-type switches, and is appropriately disposed at locations such as the main body 2 and the handle 3. One or a plurality of nail length input switches SW4 can be installed depending on the type of nail that may be accommodated in the magazine 5.

(Control by control device 200)
Moreover, FIG. 17 is referred regarding the control by the control apparatus 200 shown in FIG. Here, FIG. 17 shows a control flowchart by the control apparatus 200 of another embodiment. The determination in the control is performed mainly by the CPU 110 in FIG. 16, and the drive mechanism 10a is controlled based on the determination result.

  In the control shown in FIG. 17, first, initial setting is performed in step S201, which is the same processing as step S101 in FIG. Next, in step S202, it is determined whether or not the contact arm 26 is pressed against the workpiece W and the contact arm switch SW1 is turned on. If it is determined that the contact arm switch SW1 is in the on state (YES in step S202), the process proceeds to step S203, and if it is determined that the contact arm switch SW1 is not in the on state (in the case of NO in step S202). Executes step S202 again.

  In step S203, control for detecting the battery voltage is performed by the battery voltage detector 111, and the battery voltage is subsequently determined in step S204. If the battery voltage is greater than or equal to the specified value V1 (YES in step S204), it is determined that the remaining battery level is sufficient, and the process proceeds to step S205. In step S205, it is detected whether or not the nail length input switch SW4 is on. If nail length input switch SW4 is in the on state (YES in step S205), based on the determination that a nail longer than the reference length is used, relay RY1 is turned on in step S206, and the motor By increasing the number of rotations of the electric motor 11 from the normal state by the control unit 115, the kinetic energy of the drive wheels 30 and 30 is increased, thereby performing control to increase the driving force of the nail from the normal time. On the other hand, when the nail length input switch SW4 is in the off state (NO in step S205), based on the determination that a nail shorter than the reference length is used, the relay RY2 is turned on in step S207. Then, the number of rotations in the positive rotation direction of the electric motor 11 is set to the normal state.

  In step S204, if the battery voltage is less than the specified value V1, it is determined in step S208 whether or not the battery voltage is more than the specified value V2. If the battery voltage is greater than or equal to the specified value V2 and less than the specified value V1 (in the case of YES in step S208), based on the determination that the driving operation is possible although the remaining battery level is low, step S209 The relay RY1 is turned on, and the motor control unit 115 increases the rotational speed of the electric motor 11 from the normal state, thereby increasing the kinetic energy of the drive wheels 30 and 30 and thereby increasing the driving force of the nail from the normal time. Take control. Further, in step S210, the fact that the remaining battery level is decreasing (remaining amount warning display) is output to the display unit 120. On the other hand, if the battery voltage is less than the specified value V2 (NO in step S208), the battery is replaced in step S211 based on the determination that the remaining battery level is low or the battery is dead. The necessity (battery replacement display) is output to the display unit 120.

  In step S207, the electric motor 11 is controlled to rotate forward in the driving direction up to a specified rotational speed. In steps S206 and S207, the electric motor 11 is rotated forward in the driving direction at a higher rotational speed than in step S207. To control.

  In step S212, after any of steps S206, S207, and S210, it is determined whether or not the trigger 4 is pulled within a specified time (for example, 5 seconds) and the trigger switch SW2 is turned on. . If it is determined that the trigger switch SW2 is turned on within the specified time (YES in step S212), the process proceeds to step S213. On the other hand, if it is determined in step S212 that the trigger switch SW2 has not been turned on within the specified time, the relays RY1 and RY2 are turned off in step S216 to stop the electric motor 11, and then in step S217. After detecting that the pressing of the contact arm 26 is released and the contact arm switch SW1 is turned off, the process returns to step S202.

  In step S213, the relays RY1 and RY2 are turned off to turn off the electric motor 11, and in step S214, the driver support base 20 by the left and right drive wheels 30 and 30 is controlled by the same control as step S117 in FIG. A pressing state is formed. As a result, the driver 21 is driven in the driving direction by the rotational force of the drive wheels 30 and 30.

  In step S215, detecting that the pressing of the contact arm 26 is released and the contact arm switch SW1 is turned off, and that the pulling operation of the trigger 4 is released and the trigger switch SW2 is turned off. Thus, a series of processing is completed.

  When a fixed time (for example, 20 ms) has elapsed from the pulling operation of the trigger 4 after completion of driving, the energization on the pull side to the solenoid 42 is cut off, and the output shaft 42a is returned to the protruding direction by the compression spring 42b. When the output shaft 42a is returned in the protruding direction, the operating arm 44 is displaced as shown in FIG. 4 so that the moving support shaft 45 comes off from the line connecting the fixed support shaft 47 and the moving support shaft 48, and the toggle mechanism is released. Further, the pressing arm 50 tilts counterclockwise about the fixed support shaft 49, and the pressing state of the pressing members 41, 41 against the back surface of the driver support base 20 is released.

  As described above, according to the nail driving tool 1 including the control device 200 having the above-described configuration, the driver 21a according to the length of the nail accommodated in the housing of the magazine 5 as in the case of including the control device 100. Therefore, it is possible to perform the driving operation with an appropriate hitting force corresponding to the actual length of the nail. As a result, it is possible to eliminate the shortage and excessive driving of nails. Further, by performing the driving work with an appropriate striking force, it is possible to suppress the energy loss of the battery.

(Other embodiments)
Note that the present invention is not limited to the above embodiment, and various application examples and modification examples based on the present embodiment can be conceived. For example, the following embodiments to which this embodiment is applied can be implemented.

  In the present embodiment described above, a rechargeable nail tool is described as an example of a driving work tool, but the present invention is not limited to the configuration of a rechargeable nail tool, The present invention can be applied to the configuration of a rechargeable, AC-driven, air-driven nailer, pin tacker, and the like.

It is a side view showing the whole internal structure of nailing tool 1 of one embodiment of the present invention. It is the figure which looked at the internal structure of the nailing tool 1 of one embodiment of this invention from the arrow A direction in FIG. FIG. 3 is a cross-sectional view taken along the line B-B in FIG. It is a side view of the pressing mechanism 40 of this Embodiment, Comprising: It is a figure which shows a state when the pressing member 41 is not pressed by the driver support stand. It is a side view of the pressing mechanism 40 of this Embodiment, Comprising: It is a figure which shows a state when the pressing member 41 is pressed by the driver support stand. It is a side view of the winding wheel 60 which winds up the return rubber 70 of this Embodiment. It is a cross-sectional view of the winding wheel 60 of the present embodiment, and shows a fixed state of one end side 70a of the return rubber 70. It is a top view of the driver support stand 20 of this Embodiment, Comprising: It is a figure which shows the fixed state of the other end side 70b of the return rubber 70. FIG. It is a side view of the driver support base 20 of the present embodiment, and is a diagram showing a fixed state of the other end side 70b of the return rubber 70. It is a figure which shows the system configuration | structure of the control apparatus 100 of this Embodiment. It is a figure which shows the control flowchart by the control apparatus 100 of this Embodiment. It is a figure which shows the state of the nailing tool 1 in the control process using the control flowchart in FIG. It is a figure which shows the state of the nailing tool 1 in the control process using the control flowchart in FIG. It is a figure which shows the state of the nailing tool 1 in the control process using the control flowchart in FIG. It is a figure which shows typically the arrangement | positioning aspect of the nail length detection part 112 in the nail driving tool 1 of this Embodiment. It is a figure which shows the system configuration | structure of the control apparatus 200 of another embodiment. It is a figure which shows the control flowchart by the control apparatus 200 of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Nail driving tool 2 ... Main-body part 3 ... Handle part 4 ... Trigger 5 ... Magazine 5a ... Pusher plate 6 ... Battery pack 10 ... Main body housing 10a ... Drive mechanism 11 ... Electric motor 12 ... Drive pulley 13, 14 ... Drive pulley 16 DESCRIPTION OF SYMBOLS ... Drive belt 17 ... Holder 20 ... Driver support stand 20a ... Transmission surface 20b ... Transmission part 20c ... Engagement hole 21 ... Driver 25 ... Driver guide 25a ... Driving hole 26 ... Contact arm 28 ... Door latch 27 ... Limit switch 30 ... Drive wheel 30a ... outer peripheral surface 31 ... support shaft 32 ... bearing 40 ... pressing mechanism 41 ... pressing member (pressing roller)
42 ... Solenoid 42a ... Output shaft 42b ... Compression spring 43 ... Bracket 43a ... Connection shaft 43b ... Connection hole 44 ... Actuating arm 45, 48 ... Moving support shaft 46 ... Restriction arm 47, 49 ... Fixed support shaft 50 ... Pressing arm 60 ... Winding wheel 60a ... split surface 60b ... groove 60c ... projection 61 ... bearing 62 ... winding shaft 63 ... mainspring spring 70 ... return rubber 70a ... one end side 70b ... other end side 71 ... stopper 100 ... control device 110 ... CPU
DESCRIPTION OF SYMBOLS 111 ... Battery voltage detection part 112 ... Nail length detection part 114 ... Solenoid control part 115 ... Motor control part 120 ... Display part n ... Nail (driving material)
W ... Work material

Claims (4)

A driving tool for driving a driving material into a workpiece,
A magazine that can house driving materials of different lengths in the housing;
A striking mechanism for striking the driving material sent from the magazine to the striking position during the driving work;
A detection sensor which is disposed outside the housing of the magazine and detects information about the length of the driving material accommodated in the housing in a non-contact manner with the driving material through the housing;
A control unit for controlling the striking mechanism based on information detected by the detection sensor, thereby variably controlling the striking force of the driving material;
A driving tool characterized by having a configuration comprising: The driving tool according to claim 1,
The driving tool according to claim 1, wherein the detection sensor is attached to an outer surface of the magazine housing. The driving tool according to claim 1 or 2,
The striking mechanism includes an electric motor, an actuating member that linearly operates from a standby position to the striking position, and a pair of drives that are formed in a cylindrical shape and are rotatable by the electric motor on both sides of the actuating member. Including a wheel, the operation member is sandwiched from both sides of the outer peripheral surface of the pair of drive wheels by energizing a solenoid, and thereby the operation member is operated via the pair of drive wheels in a rotating state.
When the control unit determines that the length of the driving material accommodated in the housing is less than a preset reference length based on information detected by the detection sensor, the solenoid The electric motor is rotationally controlled at the first rotational speed in the forward rotation direction in a state where the operation member is sandwiched from both sides by the outer peripheral surfaces of the pair of drive wheels by energizing the motor, and is housed in the housing When it is determined that the length of the driving material exceeds the reference length, the electric motor is properly connected in a state where the operation member is sandwiched from the outer peripheral surfaces of the pair of drive wheels by energizing the solenoid. Rotational control is performed at a second rotational speed higher than the first rotational speed in the rotational direction, thereby increasing the striking force of the driving material by the operating member. Driving power tool characterized in that it is a structure. A driving tool according to claim 3,
Furthermore, it has an operation unit that can be manually operated by the operator,
When the operation unit is manually operated, the control unit increases the suction force of the movable iron core in the solenoid to increase the force for sandwiching the operating member than before the manual operation is performed. A driving work tool characterized in that the driving force of the driving material by the operating member is increased.

Images