JP5454904B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine, and more particularly to a cutting machine that includes a motor and that is driven by a cutting blade when electric power is supplied to the motor and the motor is driven.

  2. Description of the Related Art Conventionally, a cutting machine (table circular saw) that cuts a material to be cut by placing the material to be cut on a base portion and swinging a cutting blade up and down is known. The cutting machine has a base part and a cutting part as a head part, and wood as a material to be cut is installed on the upper surface of the turntable constituting the base part. The cutting portion includes a motor and a circular saw blade, and the circular saw blade is configured to be swingable in the vertical direction and tiltable with respect to the upper surface of the base portion. The power is supplied from the AC power supply to the motor, and the motor is driven and the circular saw blade is rotated. ing. Such a cutting machine is described in, for example, Japanese Patent Application Laid-Open No. 2005-279933 (Patent Document 1).

JP 2005-279933 A

  However, the conventional cutting machine has a configuration in which power is supplied from the AC power source to the motor as described above and the motor is driven. Therefore, it is necessary to supply power from an outlet via a power plug and a power cord. Therefore, the place where the cutting machine is used is limited to the range where the power plug reaches the outlet.

  Therefore, an object of the present invention is to provide a cutting machine that can be used even in a place where a power plug cannot be inserted into an outlet.

To achieve the above object, the present invention includes a cutting blade for cutting the workpiece, a motor and consists of the base unit該被cutting member a supportable support base part for driving the cutting blade, A power supply unit that selectively receives power from an AC power supply or a DC power supply, and can supply power suitable for driving the motor to the motor, and accommodates the motor and rotatably supports the cutting blade in the vertical direction. A swingable cutting portion, and a holder that stands upright with respect to the upper surface of the base portion at the rear portion of the base portion, and supports the cutting portion so as to be swingable up and down with respect to the upper surface of the base portion The base portion includes a base and a turntable, the base having a left base and a right base positioned so as to sandwich the turntable, and the turntable is supported on the base The base material is supported together with the base, and the base Is capable to rotate, the power supply unit includes a universal charger, the universal charger is housed located either in the base of the left base and said right base A cutting machine is provided.

  A power supply that can selectively receive power from an AC power supply or DC power supply and supply power suitable for driving the motor to the motor is provided, so power can be supplied from a DC power supply such as a battery to the motor even when the outlet is not nearby. It can be supplied and cutting work can be made possible.

Since power unit has a universal charger, different types of wearing the battery can be charged, it is possible to drive the motor with a charged battery. Moreover, since the universal charger is located and accommodated in one of the bases, the dead space in the base can be effectively used as a storage location for the universal charger.

  Moreover, it is preferable that this power supply part is equipped with the solar cell which can supply electric power to this universal charger. Since the power supply unit includes a solar battery that can supply power to the universal charger, the universal battery charger can charge the rechargeable battery even when the outlet is not nearby.

  Moreover, it is preferable that this universal charger can charge an insertion-type rechargeable battery and a slide-type rechargeable battery. Since the universal charger can charge the plug-in rechargeable battery and the slide-type rechargeable battery, a slide-type rechargeable battery or a plug-in rechargeable battery can be used as necessary.

  Moreover, it is preferable that this power supply part can supply electric power simultaneously with respect to this motor and this universal charger. Since the power supply unit can supply power to the motor and the universal charger at the same time, the rechargeable battery can be charged at the same time when the motor is driven using the AC power source to perform the cutting operation.

  Moreover, it is preferable that this power supply part has a switch for selectively switching the power supply from AC power supply and the power supply from DC power supply. Since the power supply unit has a switch for selectively switching power supply from the AC power supply and power supply from the DC power supply, the AC power supply can be selected or the DC power supply can be selected as necessary. .

  Moreover, it is preferable that this switch consists of an automatic switch which performs this switching automatically. Since the switch is an automatic switch that automatically switches, the user of the cutting machine does not need to switch the switch, and the operability of the cutting machine can be improved.

  Further, the automatic switch switches so that the electric power based on the AC power supply can be supplied to the motor when the AC power supply is connected to the power supply unit, and when the AC power supply is not connected, the automatic switch It is preferable to switch the electric power based on the DC power supply so that the motor can be supplied.

  The automatic switch switches so that power based on AC power can be supplied to the motor when AC power is connected to the power supply, and power based on DC power is supplied to the motor when AC power is not connected. Since switching is possible, the AC power supply can be preferentially used when both the DC power supply and the AC power supply can be used.

  Moreover, it is preferable that this switch is comprised by the manual switch which can be switched manually. Since the switch is configured by a manual switch that can be manually switched, the user of the cutting machine can arbitrarily switch the switch.

  Further, it is preferable that a plurality of batteries serving as DC power sources can be connected to the power source unit. Since a plurality of batteries serving as DC power supplies can be connected to the power supply unit, the motor can be driven with a larger electric power than in the case of driving with one battery.

  Moreover, it is preferable that this power supply part has a protection circuit for protecting this battery. Since the power supply unit has a protection circuit for protecting the battery, the battery can be prevented from being damaged.

  The motor is preferably an AC motor, and the power supply unit preferably boosts the power from the DC power supply and supplies the boosted power to the AC motor. The motor is composed of an AC motor, and the power supply unit boosts the power from the DC power supply and supplies it to the AC motor, so that the AC motor can be driven by the power based on the DC power supply.

  The motor is preferably a direct current motor, and the power supply unit preferably steps down the power from the alternating current power source and supplies it to the direct current motor.

  The motor is a DC motor, and the power supply unit steps down the power from the AC power supply and supplies it to the DC motor. Therefore, the DC motor can be driven by the power based on the AC power supply.

  The DC motor is preferably a brushless motor. Since the DC motor is composed of a brushless motor, it is possible to reduce the size of the cutting machine that houses the motor.

  Moreover, it is preferable to have a drive power supply display lamp which can visually recognize that either the AC power supply or the DC power supply is supplying power to the motor. Since either the AC power supply or the DC power supply has a drive power indicator lamp that can visually recognize that power is being supplied to the motor, which of the AC power supply and the DC power supply is used Can be visually recognized.

  Further, it is preferable that a battery as the DC power source can be connected to the power supply unit, and a battery remaining amount lamp for displaying the remaining amount of the battery is provided.

  A battery that can be connected to a DC power supply can be connected, and the power supply unit has a battery level indicator that displays the remaining battery level. Therefore, the disconnection operation should be performed while recognizing when the battery needs to be replaced or when it needs to be charged. Can do.

  As described above, the present invention can provide a cutting machine that can be used even in a place where a power plug cannot be inserted into an outlet.

The left view which shows the cutting machine by the 1st Embodiment of this invention. The top view which shows the cutting machine by the 1st Embodiment of this invention. The principal part side view which shows the charging box of the cutting machine by the 1st Embodiment of this invention. FIG. 4 is an essential part cross-sectional view taken along line IV-IV in FIG. 3. The circuit diagram which shows the state in which the electric power from an outlet socket is supplied to the motor in the cutting machine by the 1st Embodiment of this invention. The circuit diagram which shows the state in which the electric power from a lithium ion battery is supplied to the motor in the cutting machine by the 1st Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 1st Embodiment of this invention. The left view which shows the cutting machine by the 2nd Embodiment of this invention. The top view which shows the cutting machine by the 2nd Embodiment of this invention. The principal part side view which shows the charging box of the cutting machine by the 2nd Embodiment of this invention. FIG. 11 is an essential part cross-sectional view along the line XI-XI in FIG. 10. The circuit diagram which shows the state in which the electric power from an outlet socket is supplied to the motor in the cutting machine by the 2nd Embodiment of this invention. The circuit diagram which shows the state in which the electric power from a lithium ion battery is supplied to the motor in the cutting machine by the 2nd Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 2nd Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 3rd Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 4th Embodiment of this invention. The circuit diagram which shows the state in which the electric power from an outlet socket is supplied to the motor in the cutting machine by the 5th Embodiment of this invention. The circuit diagram which shows the state in which the electric power from a lithium ion battery is supplied to the motor in the cutting machine by the 5th Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 5th Embodiment of this invention. The circuit diagram which shows the state in which the electric power from an outlet socket is supplied to the motor in the cutting machine by the 6th Embodiment of this invention. The circuit diagram which shows the state in which the electric power from a lithium ion battery is supplied to the motor in the cutting machine by the 6th Embodiment of this invention. The flowchart which shows operation | movement of the cutting machine by the 7th Embodiment of this invention. The right view which shows the cutting machine by the 8th Embodiment of this invention. The right view which shows the cutting machine by the modification of this invention. The front view which shows the cutting machine by the modification of this invention.

  A cutting machine according to a first embodiment of the present invention will be described with reference to FIGS. A tabletop circular saw 1 which is a cutting machine shown in FIG. 1 is a tabletop circular saw having a slide mechanism, and is mainly composed of a base portion 2 and a cutting portion 3.

  The base portion 2 includes a base 21 on which wood that is a member to be cut is placed, a turntable 22 rotatably supported on the base 21, and a fence 23 provided on the base 21. As shown in FIG. 2, the base 21 includes a pair of a left base 21A and a right base 21B. The base part 2 corresponds to a support base part. The direction in which the left base 21A and the right base 21B are aligned is defined as the left-right direction, and the upper side (upper side in FIG. 1) of the base 21 on which the wood is placed is defined as the upper side, and the opposite is defined as the lower side.

  The left base 21A is provided with a charging (power supply) box housing frame 21C (FIG. 4). The charging box housing frame 21C is fixed to the left base 21A in a dead space formed in the left base 21A. A through hole that penetrates the charging box housing frame 21C is formed in the charging box housing frame 21C, and a female screw is screwed into a portion of the left base 21A that forms the through hole. A screw 21E is screwed into the female screw. A charging box 21D is housed in the charging box housing frame 21C. By tightening the screw 21E, the tip of the screw 21E abuts on the charging box 21D, and the charging box 21D can be fixed in the charging box housing frame 21C. By loosening the screw 21E, the charging box 21D can be moved to the left and removed from the charging box housing frame 21C.

  The charging box 21D houses therein a general-purpose charger 21D ′ that can charge a plurality of types of secondary batteries, and has a secondary battery insertion hole 21a (FIG. 4). A lithium ion battery 21F as a plug-in battery can be inserted into the secondary battery insertion hole 21a. The lithium ion battery 21F in the inserted state can supply power to a motor 38 described later, and can be charged by supplying power from an outlet serving as an AC power source described later.

  A straight groove (not shown) is formed on the upper surface of the turntable 22. A groove portion (not shown) is located at a line of intersection when a circular saw blade 31 described later swings downward and intersects with the turntable 22, and can accommodate the cutting edge of the circular saw blade 31.

  The turntable 22 is disposed between the right base 21B and the left base 21A. As shown in FIG. 1, the turntable 22 includes a substantially circular turntable main body 22A, a handle 22B for projecting on one side of the turntable main body 22A and rotating the turntable 22, and on the other side. It is comprised from the cutting part support part 22C which supports the holder 40 mentioned later provided. The direction in which the handle 22B protrudes from the turntable 22 and is orthogonal to the left-right direction (FIG. 2) is defined as the front and the opposite is defined as the rear. As shown in FIG. 2, the turntable main body 22 </ b> A is composed of a substantially circular portion located above the base 21, and a protruding portion that protrudes forward from the substantially circular portion and to which a handle 22 </ b> B is attached. .

  The fence 23 is provided on the base 21 and at an upper position of the turntable 22. As shown in FIG. 2, the fence 23 includes a left fence 23A and a right fence 23B corresponding to the left base 21A and the right base 21B. The front surfaces of the left fence 23A and the right fence 23B are arranged so as to be positioned on the same plane, and define the position of the material to be cut.

  The holder shaft 22D, which is positioned on the extension line of the groove portion (not shown) and is parallel to the extension line of the groove portion, and the cutting portion 3 are fixed to the cutting portion support portion 22C of the turntable 22 at an arbitrary inclination angle. The standing portion 22E is provided.

  A holder 40 is erected on the cutting portion support portion 22C. The lower end of the holder 40 is supported by a holder shaft 22D. The axis of the holder shaft 22D is substantially coincident with the upper surface of the turntable 22, and the holder 40 can be tilted to the left and right with respect to the upper surface of the turntable 22 with the holder shaft 22D as a rotation fulcrum. The holder shaft 22D is fixed to the holder 40 with screws (not shown). When the holder 40 is tilted, the holder shaft 22D serving as a tilting axis also rotates together with the holder 40.

  The standing portion 22E is formed with a substantially arc-shaped slot (not shown) centered on the holder shaft 22D. A clamp lever 40A passes through a long hole (not shown), and a screw portion provided at the tip of the clamp lever 40A is screwed into a screw hole portion formed on the back surface of the holder 40. When the clamp lever 40A is loosened, the holder 40 can be tilted within a range in which the clamp lever 40A can relatively move within a long hole (not shown) with the holder shaft 22D as a fulcrum. When the clamp lever 40A is tightened when the holder 40 is inclined at an arbitrary angle, the standing portion 12B of the turntable 22 is tightened between the clamp lever 40A and the holder 40, and the holder 40 is fixed so as not to tilt. . The elongated hole (not shown) is formed within a range in which the holder 40 can tilt about 45 ° to the left side from a state perpendicular to the upper surface of the turntable 22.

  The holder 40 extends substantially upward from the desktop circular saw 1, and a first end holding member 40B is provided at the extended end. The first end holding member 40B holds a total of two hollow steel pipes 50 and 51 oriented in the front-rear direction.

  As shown in FIG. 1, one end of each of the two pipes 50 and 51 is covered and held by a second end holding member 53 described later, and the other end is covered by the first end holding member 40B. By being held apart, they are arranged substantially in parallel to form a pair. An imaginary plane including the axis of the pair of pipes 50 and 51 has a positional relationship that is substantially orthogonal to a swing shaft 32 of the cutting unit 3 described later.

  As shown in FIG. 1, the cutting unit 3 has a swing shaft 32 that is arranged in parallel to a rotation shaft 31 </ b> A of a circular saw blade 31 described later. The cutting unit 3 includes a circular saw blade 31 and the like supported so as to be swingable on the swing shaft 32, and a sliding support portion 36 that supports the circular saw blade 31 and the like so as to be slidable along the pipes 50 and 51. And.

  The swing support portion 36 is formed with two through holes (not shown) oriented in the front-rear direction. A through-hole (not shown) has a substantially circular cross section cut by a plane perpendicular to the front-rear direction, and a pair of pipes 50 and 51 pass through each other. The inner diameter of the through hole (not shown) is larger than the outer diameter of the pipes 50, 51. With this configuration, the swing support part 36 is attached to the pair of pipes 50, 51 with the pair of pipes 50, 51 being mounted. It is slidable. A direction in which a through hole (not shown) is directed, that is, a sliding direction of the swing support portion 36 with respect to the pipes 50 and 51 coincides with a direction substantially orthogonal to the swing shaft 32 described later. With such a configuration, the pair of pipes 50 and 51 support the cutting portion 3 via the sliding support portion 36.

  Since the through holes (not shown) are arranged in the vertical vertical direction, the virtual plane including the axes of the pair of pipes 50 and 51 has a positional relationship substantially parallel to the swinging direction of the circular saw blade 31 described later. . When the sliding support portion 36 slides with respect to the pair of pipes 50, 51, the circular saw blade 31 is also moved in a direction substantially orthogonal to the swing shaft 32.

  The circular saw blade 31 is supported so as to be rotatable around a rotation shaft 31 </ b> A in a cutting portion housing 3 </ b> A provided in the cutting portion 3. The upper part of the circular saw blade 31 is accommodated in the cutting part housing 3A, and the lower part of the circular saw blade 31 can be exposed to the outside of the cutting part housing 3A downward from the cutting part housing 3A. The exposed portion is covered with a safety cover 32 when the circular saw blade 31 is not used for cutting.

  As shown in FIG. 1, a handle 37 is provided at the upper part of the cutting unit 3, and the handle 37 has AC power supplied from an outlet through a power cord 37E described later, and lithium ion as a secondary battery described later. A manual switch 37A is provided for selecting any one of the DC power supplied from the battery 21F and supplying the selected DC power to the motor 38 described later. Further, the handle 37 has a battery remaining amount lamp 37B for displaying the remaining amount of the lithium ion battery 21F, and a motor 38 described later driven by power based on AC power, or a motor 38 described later by power based on DC power. And a drive power supply indicator lamp 37C that can visually recognize whether or not is driven. The handle 37 is provided with a trigger switch 37D for starting the driving of the circular saw blade 31 when the user of the desk circular saw 1 operates with a finger.

  The cutting part 3 is always urged upward by a return spring (not shown). For this reason, when the cutting part 3 is not pushed downward by the user of the tabletop circular saw 1 at the time of non-cutting, as shown in FIG. Yes.

  A motor 38 (FIG. 5, etc.) is provided in the cutting part housing 3A of the cutting part 3, and a power cord 37E (FIG. 1, etc.) is connected to the cutting part housing 3A. By inserting the plug 37F provided at the tip of the power cord 37E into the outlet, the tabletop circular saw 1 can be supplied with power from the AC power source and can supply power to the motor 38. The circular saw blade 31 is configured to rotate by the driving force of the motor 38 that is driven by being supplied.

  As shown in FIG. 5, the motor 38 of the tabletop circular saw 1 is constituted by an AC motor 38-1, and the AC motor 38-1 can be connected to a power cord 37E via a manual switch 37A. The general-purpose charger 21D ′ is connected to the power cord 37E, and can charge the lithium ion battery 21F with AC power supplied through the power cord 37E. The lithium ion battery 21F attached to the general-purpose charger 21D ′ is connected to the manual switch 37A via the inverter 38A.

  When the manual switch 37A is switched as shown in FIG. 5, AC power is supplied to the AC motor 38-1. When the manual switch 37A is switched as shown in FIG. 6, the DC power supplied from the lithium ion battery 21F is converted into AC power by the inverter 38A, boosted, and supplied to the AC motor 38-1. Yes. The power cord 37E, the manual switch 37A, the inverter 38A, and the general-purpose charger 21D ′ constitute a power source unit. In the state where the manual switch 37A is connected to the AC side (FIG. 5), the general-purpose charger 21D ′ is connected to the outlet via the power cord 37E. It is also possible to charge the secondary battery connected to the charger 21D ′.

  When using the tabletop circular saw 1, as shown in FIG. 7, the user of the tabletop circular saw 1 first determines whether or not the plug 37F of the tabletop circular saw 1 can be inserted into an outlet (S1), If the plug can be inserted (S1: YES), the user inserts the plug 37F into the outlet, and the user switches the power switch to the side where the table-top circular saw 1 can receive the supply of AC power, that is, the state shown in FIG. (S2). Then, when the user operates the trigger switch 37D (S3), the AC motor 38-1 is driven, and the circular saw blade 31 rotates.

  If the plug 37F cannot be inserted into the outlet (S1: NO), it is next determined whether or not the lithium ion battery 21F is in the general-purpose charger 21D ′ (S4). If there is the lithium ion battery 21F (S4: YES), the user switches the power supply switch to the side where the tabletop saw 1 can receive the DC power from the lithium ion battery 21F, that is, the state shown in FIG. 6 (S5). ). As a result, the DC power can be converted into AC power by the inverter 38A (S6). When the user operates the trigger switch 37D (S3), the AC motor 38-1 is driven and the circular saw blade 31 rotates. To do.

  Since it is possible to selectively receive power from an AC power source or a DC power source and supply power suitable for driving the motor 38 to the motor 38, the lithium ion battery 21F, which is a DC power source, can be supplied from the lithium power battery 21F to the motor 38 even when the outlet is not nearby. Electric power can be supplied and cutting work can be enabled.

  In addition, since the manual switch 37A for selectively switching between the power supply from the AC power supply and the power supply from the DC power supply is provided, the AC power supply or the DC power supply can be selected as necessary. . Further, the user of the tabletop circular saw 1 can arbitrarily switch the switch. Further, the motor 38 is composed of an AC motor 38-1, and the power supply unit boosts the power from the DC power supply and supplies it to the AC motor 38-1, so that the AC motor 38-1 is driven by the power based on the DC power supply. Can do.

  In addition, since the drive power indicator lamp 37C that can visually recognize that any one of the AC power supply and the DC power supply supplies power to the motor 38 is provided, which one of the AC power supply and the DC power supply is used. You can see if you are using it.

  Further, since the battery remaining amount lamp 37B for displaying the remaining amount of the battery is provided, the cutting operation can be performed while recognizing the time of battery replacement or the time when the battery needs to be charged.

  Next, a second embodiment will be described with reference to FIGS. In the second embodiment, the solar battery 121G is provided, and the charging box 121D includes a universal charger 121D ′ that can simultaneously charge (connect) two types of secondary batteries, a plug-in type and a slide type. It differs from the first embodiment in that it has. The rest is the same as the first embodiment.

  The universal charger 121D ′ is housed in the charging box 121D and can charge two types of batteries, ie, a plug-in type lithium ion battery 21F and a slide type lithium ion battery 121F. The slide-type lithium ion battery 121F has a guided portion (not shown) that can be engaged with a rail (not shown) provided on the outer surface of the charging box 121D, and the guided portion is engaged with the rail (not shown). By being guided, it is set at a chargeable position.

  The solar battery 121G is provided on the upper surface of the left base 21A, and is electrically connected to both the plug-in type lithium ion battery 21F and the slide type lithium ion battery 121F attached to the charging box 121D. For this reason, even if it is a place where an outlet is not near, the electric power generated by the solar battery 121G can be charged to the lithium ion batteries 21F and 121F. The universal charger 121D ′ and the solar battery 121G constitute a power supply unit.

  Since the power supply unit has a universal charger 121D ′, it can be charged by attaching different types of lithium ion batteries 21F and 121F, and the motor 38 is driven using the charged lithium ion batteries 21F and 121F. Can be made.

  Moreover, since universal charger 121D 'is accommodated in base 21, the dead space in base 21 can be effectively utilized as a storage place of universal charger 121D'. Further, the universal charger 121D ′ can charge the plug-in type lithium ion battery 21F and the slide type lithium ion battery 121F, so that the slide type lithium ion battery 121F can be used or the plug-in type lithium ion battery 21F as necessary. Can be used.

  In addition, since a plurality of lithium ion batteries 21F and 121F, which are direct current power sources, can be connected, the motor 38 can be driven with a larger electric power than in the case of driving with one lithium ion battery 21F.

  Next, a third embodiment will be described with reference to FIGS. In the third embodiment, the first embodiment is that a DC motor 38-2 is used instead of the AC motor 38-1, and an AC / DC converter 38B is used instead of the inverter 38A. Different from form. The rest is the same as the first embodiment.

  As shown in FIG. 12, the motor 38 of the tabletop circular saw 1 is constituted by a DC motor 38-2. The DC motor 38-2 is connected to a power cord 37E and an AC / DC converter 38B via a trigger switch 37D and a manual switch 37A. Can be connected to. The general-purpose charger 21D ′ is connected to the power cord 37E, and can charge the lithium ion battery 21F with AC power supplied through the power cord 37E. The lithium ion battery 21F attached to the charging box 21D is connected to the manual switch 37A and the DC motor 38-2.

  As shown in FIG. 12, when the manual switch 37A is switched, AC power is converted to DC power by the AC / DC converter 38B, stepped down, and supplied to the DC motor 38-2. As shown in FIG. 13, when the manual switch 37A is switched, the DC power supplied from the lithium ion battery 21F is supplied to the DC motor 38-2. The AC / DC converter 38B constitutes a power supply unit.

  When using the tabletop circular saw 1, the user of the tabletop circular saw 1 first determines whether or not the lithium ion battery 21F is set in the general-purpose charger 21D ′ of the tabletop circular saw 1, as shown in FIG. Judgment is made (S11). If it is set (S11: YES), the user switches the power switch to the side where the table-top circular saw 1 can receive the supply of DC power from the lithium ion battery 21F (S12). Then, when the user operates the trigger switch 37D (S13), the DC motor 38-2 is driven, and the circular saw blade 31 rotates.

  If it is not set (S11: NO), it is next determined whether or not the plug 37F can be inserted into the outlet (S14). If the plug 37F can be inserted into the outlet (S14: YES), the user inserts the plug 37F into the outlet, and the user switches the power switch to the side where the tabletop circular saw 1 can receive the supply of AC power ( S15). As a result, AC power can be converted to DC power by the AC / DC converter 38B (S16), and when the user operates the trigger switch 37D (S13), the DC motor 38-2 is driven, and the circular saw The blade 31 rotates. If plug 37F cannot be inserted into the outlet (S14: NO), the process is terminated.

  The motor 38 includes a DC motor 38-2, and the power supply unit steps down the power from the AC power source and supplies it to the DC motor 38-2. Therefore, the DC motor 38-2 can be driven by power based on the AC power source. .

  Next, a fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the first embodiment in that an AC brushless motor is used instead of the AC motor 38-1. The rest is the same as the first embodiment.

  When using the tabletop circular saw 1, as shown in FIG. 15, the user of the tabletop circular saw 1 first determines whether or not the plug 37F of the tabletop circular saw 1 can be inserted into an outlet (S21), If the plug can be inserted (S21: YES), the user inserts the plug 37F into the outlet, and switches the power switch to the side where the tabletop circular saw 1 can receive the supply of AC power (S22). Then, the brushless motor can be controlled by the motor control inverter (S23). When the user operates the trigger switch 37D (S24), the AC motor 38-1 is driven, and the circular saw blade 31 rotates.

  If the plug 37F cannot be inserted into the outlet (S21: NO), it is next determined whether or not the lithium ion battery 21F is in the general-purpose charger 21D ′ (S25). If there is the lithium ion battery 21F (S25: YES), the user switches the power switch to the side where the tabletop circular saw 1 can receive the DC power supplied from the lithium ion battery 21F (S26). As a result, the inverter 38A can convert DC power to AC power (S27), and the brushless motor can be controlled by the motor control inverter (S23). Then, when the user operates the trigger switch 37D (S24), the AC brushless motor is driven, and the circular saw blade 31 rotates.

  Next, a fifth embodiment will be described with reference to FIG. The fifth embodiment is different from the third embodiment in that a DC brushless motor is used instead of the DC motor 38-2. The rest is the same as the third embodiment.

  When using the tabletop circular saw 1, the user of the tabletop circular saw 1 first determines whether or not the lithium ion battery 21F is set in the general-purpose charger 21D ′ of the tabletop circular saw 1, as shown in FIG. Judgment is made (S31). If it is set (S31: YES), the user switches the power switch to the side where the table-top circular saw 1 can receive the supply of DC power from the lithium ion battery 21F (S32). Then, the brushless motor can be controlled by the motor control inverter (S33). When the user operates the trigger switch 37D (S34), the DC motor 38-2 is driven and the circular saw blade 31 rotates.

  If it is not set (S31: NO), it is next determined whether or not the plug 37F can be inserted into the outlet (S35). If the plug 37F can be plugged into the outlet (S35: YES), the user inserts the plug 37F into the outlet, and the user switches the power switch to the side where the tabletop circular saw 1 can receive the supply of AC power ( S36). Then, AC power can be converted into DC power by the AC / DC converter 38B and can be stepped down (S37), and the brushless motor can be controlled by the motor control inverter (S33). Then, when the user operates the trigger switch 37D (S34), the DC brushless motor is driven, and the circular saw blade 31 rotates. If the plug 37F cannot be inserted into the outlet (S35: NO), the process is terminated. Since the direct current motor 38-2 is a brushless motor, it is possible to reduce the size of the portion of the tabletop circular saw 1 that houses the motor.

  Next, a sixth embodiment will be described with reference to FIGS. The sixth embodiment differs from the first embodiment in that an automatic switch is used instead of the manual switch 37A. The rest is the same as the first embodiment.

  The automatic switch includes a switch unit 37H and a switch unit operation unit 37I. As shown in FIGS. 17 and 18, a switch unit 37H is provided instead of the manual switch 37A of the first embodiment, and the switch unit The operation unit 37I is electrically connected to the switch power cord 37E and the switch unit 37H. It is possible to automatically determine whether or not the power cord 37E is connected to the outlet by the switch unit operation unit 37I, and the switch unit 37H can be automatically switched according to the determination result. The switch unit 37H and the switch unit operation unit 37I correspond to automatic switches and constitute a power supply unit.

  In the state shown in FIG. 17, AC power is supplied to the AC motor 38-1. In the state shown in FIG. 18, the DC power supplied from the lithium ion battery 21F is converted into AC power by the inverter 38A, boosted, and supplied to the AC motor 38-1.

  When using the tabletop circular saw 1, as shown in FIG. 19, the tabletop circular saw 1 first determines whether or not the plug 37F of the tabletop circular saw 1 can be plugged into an outlet (S41). If possible (S41: YES), the user inserts the plug 37F into the outlet, and the switch unit operation unit 37I automatically switches the switch unit 37H to the side on which the tabletop circular saw 1 can receive the supply of AC power ( S42). Then, when the user operates the trigger switch 37D (S43), the AC motor 38-1 is driven, and the circular saw blade 31 rotates.

  If the plug 37F cannot be inserted into the outlet (S41: NO), it is next determined whether or not the lithium ion battery 21F is in the general-purpose charger 21D ′ (S44). If there is the lithium ion battery 21F (S44: YES), the switch unit operation unit 37I automatically switches the switch unit 37H to the side where the tabletop circular saw 1 can receive the supply of DC power from the lithium ion battery 21F ( S45). As a result, the DC power can be converted into AC power by the inverter 38A (S46). When the user operates the trigger switch 37D (S43), the AC motor 38-1 is driven and the circular saw blade 31 rotates. To do. If there is no lithium ion battery 21F (S44: NO), the process is terminated.

  Since it has an automatic switch consisting of the switch part 37H and the switch part operation part 37I, the user of the tabletop circular saw 1 does not have to switch the manual switch 37A, and the operability of the tabletop circular saw 1 can be improved.

  Further, the automatic switch composed of the switch unit 37H and the switch unit operation unit 37I is switched so that electric power based on the AC power source can be supplied to the motor 38 when the AC power source is connected to the power source unit, and the AC power source is connected. If not, the power based on the DC power supply is switched so as to be supplied to the motor 38, so that the AC power supply can be preferentially used when both the DC power supply and the AC power supply are available. .

  Next, a seventh embodiment will be described with reference to FIGS. The sixth embodiment differs from the third embodiment in that an automatic switch is used instead of the manual switch 37A. The rest is the same as the third embodiment.

  As in the sixth embodiment, the automatic switch includes a switch unit 37H and a switch unit operation unit 37I. As shown in FIGS. 20 and 21, the automatic switch replaces the manual switch 37A of the third embodiment. The switch unit 37H is provided, and the switch unit operation unit 37I is electrically connected to the switch power cord 37E and the switch unit 37H. The switch part 37H can be automatically switched by the switch part operation part 37I. In the state shown in FIG. 20, AC power is converted to DC power, stepped down, and supplied to DC motor 38-2. In the state shown in FIG. 21, the DC power from the lithium ion battery 21F is supplied to the DC motor 38-2.

  Next, an eighth embodiment will be described with reference to FIG. The eighth embodiment is different from the first embodiment in that control is performed to charge the lithium ion battery 21F while the AC motor 38-1 is driven by the supply of power from the AC power supply. Different. The rest is the same as the first embodiment.

  When using the tabletop circular saw 1, as shown in FIG. 22, the tabletop circular saw 1 first determines whether or not the lithium ion battery 21F is set in the general-purpose charger 21D ′ of the tabletop circular saw 1. (S51). If it is set (S51: YES), it is next determined whether or not there is a remaining amount of the lithium ion battery 21F (S52). If the remaining amount of the lithium ion battery 21F is present (S52: YES), the user then switches the power supply selector switch to the side where the tabletop circular saw 1 can receive the supply of DC power from the lithium ion battery 21F (S53). ). As a result, the DC power from the lithium ion battery 21F becomes a state where AC power can be increased and boosted by the inverter 38A (S54), and the AC motor 38-1 is driven by the user operating the trigger switch 37D (S55), The circular saw blade 31 rotates.

  If the lithium ion battery 21F is not set (S51: NO), it is next determined whether or not the plug 37F can be inserted into the outlet (S56). If the plug 37F can be plugged into the outlet (S56: YES), the user inserts the plug 37F into the outlet, and the user switches the power switch to the side where the tabletop circular saw 1 can receive AC power ( S57). Then, when the user operates the trigger switch 37D (S55), AC power is supplied to the AC motor 38-1, the AC motor 38-1 is driven, and the circular saw blade 31 rotates. If the plug 37F cannot be inserted into the outlet (S56: NO), the process is terminated.

  Next, when there is no remaining amount of the lithium ion battery 21F (S52: NO), it is next determined whether or not the plug 37F can be inserted into the outlet (S58). If the plug 37F can be inserted into the outlet (S58: YES), the user inserts the plug 37F into the outlet, whereby AC power is supplied to the general-purpose charger 21D 'and the lithium ion battery 21F is charged (S59). ). Next, the user switches the power switch to the side where the table-top circular saw 1 can receive the supply of AC power (S57). Then, when the user operates the trigger switch 37D (S55), AC power is supplied to the AC motor 38-1, the AC motor 38-1 is driven, and the circular saw blade 31 rotates. If the plug 37F cannot be inserted into the outlet (S56: NO), the process is terminated.

  Since electric power can be simultaneously supplied to the motor 38 and the universal charger 121D ′, the lithium ion battery 21F can be charged simultaneously with the cutting operation by driving the motor 38 using an AC power source. When the remaining amount of the battery is small, the lithium ion battery particularly has a protective device so that the battery life is remarkably reduced when the battery is overdischarged. For example, in addition to connecting the switch unit operation unit 37I to the power cord 37E, a protective device is connected to the output side of the general-purpose charger 21D ′ (that is, the side connected to the switch unit 37H), and the remaining amount of the battery is reduced. When the remaining amount is low, that is, when it is detected that the battery is close to an overdischarged state, the switch unit 37H is automatically opened (a state in which the connection with the battery side is cut off). By switching to, the secondary battery can be protected. Further, by detecting an overcurrent state in which a large current flows through the battery by the switch unit operation unit 37I, the switch unit 37H is automatically switched to an open state (a state in which the connection with the battery side is cut off). Overcurrent can also be prevented. As a result, the battery can be prevented from being damaged.

  Next, a ninth embodiment will be described with reference to FIG. The ninth embodiment differs from the first embodiment in that a charging box 121D having a general-purpose charger 121D ′ is provided in the cutting unit 103. The charging box 121D is a part of the cutting unit 103 and is provided above the portion 103B of the cutting unit 103 in which the motor 38 is accommodated.

  The part 103B in which the motor 38 is accommodated in the cutting part 103 protrudes in the right direction, and the charging box 121D and the general-purpose charger 121D ′ are in the right direction from the rightmost end of the cutting part 103 protruding in the right direction. Is not protruding. In addition, the upper ends of the charging box 121 </ b> D and the general-purpose charger 121 </ b> D ′ are positioned below the upper end of the handle 37 in the upper and lower portions. Therefore, the charging box 121D does not protrude rightward or upward from the outline of the cutting portion 103. For this reason, it is possible to prevent the charging box 121D and the general-purpose charger 121D ′ from getting in the way when the user is performing the cutting operation. Furthermore, the force when swinging the cutting part 103 downward (during cutting) can be reduced by the weight of the charging box 121D, and workability can be improved.

  The cutting machine of the present invention is not limited to the embodiment described above, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the cutting machine is the tabletop circular saw 1, but is not limited to the tabletop circular saw 1. For example, the present invention may be applied to a so-called stationary band saw 201 as shown in FIG. 24 or a so-called table saw 301 as shown in FIG. In the case of the stationary band saw 201 as shown in FIG. 24, the charging box 221D having the general-purpose charger 221D ′ may be housed and provided in the base 221 for placing the material to be cut, for example. In the case of the table saw 301 as shown in FIG. 25, the charging box 321D having the general-purpose charger 321D ′ may be fixed to the lower surface of the table 322 for placing the material to be cut, for example. By adopting such a configuration, it is possible to work in any place without the charging box interfering with the cutting work.

  In this embodiment, a general-purpose charger capable of charging the lithium ion battery 21F is provided. However, a charger capable of charging other types of rechargeable batteries such as a nickel-cadmium rechargeable battery and a nickel-hydrogen rechargeable battery is provided. It may be. Further, the secondary battery is not limited to a lithium ion battery, and may be a nickel-cadmium battery, a nickel metal hydride battery, or the like.

  In the present embodiment, the long hole (not shown) is formed within a range in which the holder 40 can be tilted about 45 ° to the left side from a state perpendicular to the upper surface of the turntable 22. Although it was possible to incline only on one side (the lower side in FIG. 2), it is also possible to form a long hole so that the left and right sides can be inclined by about 45 °, and the holder 40 can be inclined to both the left and right sides.

  In the eighth embodiment, an automatic switch may be used instead of the manual switch.

  The cutting machine of the present invention is particularly useful in the field of cutting machines in which power is supplied to a motor and the cutting blade is driven by driving the motor.

DESCRIPTION OF SYMBOLS 1 ... Desktop circular saw 2 ... Base part 3 ... Cutting part 21 ... Base 21D '... General-purpose charger 21F ... Lithium ion battery 22 ... Turntable 31 ... Round Saw blade 37 ... Handle 37A ... Manual switch 37B ... Battery level lamp 37C ... Drive power indicator lamp 37D ... Trigger switch 37H ... Switch part 37I ... Switch part operation part 38 ... motor 38-1 ... AC motor 38-2 ... DC motor 121F ... lithium ion battery 121G ... solar cell

Claims (15)

A cutting blade for cutting the material to be cut;
A motor for driving the cutting blade;
A support section capable of supporting the該被cutting member made from the base portion,
A power supply unit that is selectively supplied with power from an AC power supply or a DC power supply, and that can supply power suitable for driving the motor to the motor;
A cutting portion that accommodates the motor and rotatably supports the cutting blade, and can swing in a vertical direction;
A holder that stands upright at the rear part of the base part so as to be tiltable with respect to the upper surface of the base part, and that supports the cutting part so as to swing up and down with respect to the upper surface of the base part
The base portion includes a base and a turntable,
The base has a left base and a right base positioned so as to sandwich the turntable,
The turntable is supported on the base and supports the workpiece together with the base and is rotatable with respect to the base.
The power supply unit has a universal charger,
The universal charger is located and accommodated in one of the left base and the right base . The power supply unit, the cutting machine according to claim 1, wherein that it comprises a solar cell that can supply power to the universal charger. The universal charger, cutting machine according to claim 1, wherein the bayonet-type battery and sliding the rechargeable battery is rechargeable. The power supply unit, the cutting machine according to claim 1, wherein the relative and the motor and the universal charger can supply power at the same time.   2. The cutting machine according to claim 1, wherein the power supply unit includes a switch for selectively switching power supply from an AC power supply and power supply from a DC power supply. 6. The cutting machine according to claim 5, wherein the switch is an automatic switch for automatically performing the switching. The automatic switch switches so that electric power based on the AC power source can be supplied to the motor when the AC power source is connected to the power source unit, and the DC power source when the AC power source is not connected. The cutting machine according to claim 6 , wherein the electric power based on is switched to be able to be supplied to the motor. 6. The cutting machine according to claim 5, wherein the switch comprises a manual switch that can be manually switched.   The cutting machine according to claim 1, wherein a plurality of batteries serving as DC power sources can be connected to the power source unit. The cutting machine according to claim 9 , wherein the power supply unit includes a protection circuit for protecting the battery. The motor is an AC motor,
2. The cutting machine according to claim 1, wherein the power supply unit boosts power from the DC power supply and supplies the boosted power to the AC motor. The motor is a DC motor,
2. The cutting machine according to claim 1, wherein the power source unit steps down the power from the AC power source and supplies the power to the DC motor. 13. The cutting machine according to claim 12, wherein the DC motor is a brushless motor.   2. The cutting machine according to claim 1, further comprising a drive power indicator lamp that can visually recognize that any one of the AC power source and the DC power source supplies power to the motor.   2. The cutting machine according to claim 1, wherein a battery as the direct current power source can be connected to the power supply unit, and a battery remaining amount lamp for displaying the remaining amount of the battery is provided.

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