JP6824755B2 - Jigsaw - Google Patents

Description

The present invention relates to a jigsaw that cuts a work material with a blade.

Patent Document 1 below discloses a jigsaw in which a cutting blade is attached to a rod that is projected downward in front of the left and right half housings and is reciprocating. A motor, which is a drive source for reciprocating motion, is arranged in the housing, a fan is attached to the motor, and the exhaust of the fan is guided to the first blow-out passage and the second blow-out passage. These blow-out passages are formed between the outer surface of the left (right) housing and the cover member mounted on the outside of the housing, and the first blow-out passage is such that the exhaust is directed to the top dead center of the blade mounting portion of the rod. It is formed on the left and right, and the second blowout passage is formed on the left and right so that the exhaust is directed to the cutting portion. In addition, a dust collection path in the front-rear direction is formed below the housing, and a dust collection port (intake port) is opened at the front end of the dust collection path. By connecting a dust collector to the dust collection path, the area around the cut portion is formed. Cutting debris is sucked into the dust collecting path.
In Patent Document 2 below, a ventilation passage (blow-out passage) that opens to the lower surface of the housing on the rear side of the blade and connects to a blow-out nozzle arranged in the center in the left-right direction and penetrates in the front-rear direction at the lower part of the housing. Disclosed is a jig saw provided with a dust collecting path opened as a dust collecting port under the blowout nozzle and a shutter member that closes a ventilation path when the dust collecting nozzle is connected to the dust collecting path.
Patent Document 3 below discloses a jigsaw in which a dust collecting nozzle of a dust collecting path is arranged at the center in the left-right direction.
Patent Document 4 below discloses that the dust suction nozzle of the jigsaw dust suction device is attached to the base of the jigsaw and is arranged on the right side or the left side of the blade.

Patent Documents 5 and 6 below disclose a jigsaw in which a base abutting on an upper surface of a material to be cut is attached to a lower surface of a housing by inserting a base fixing bolt.

Embodiment 2 of Patent Document 7 below discloses a top handle type jigsaw in which a handle extends between the front end and the rear end of the housing. In this jigsaw, the front and rear length of the handle is shortened, and the battery pack is up and down with respect to the rear end surface of the housing and the rear end surface of the handle in order to make it compact in the front and rear direction by the amount that it becomes relatively large in the vertical direction due to the installation of the handle. It is removable by sliding it in the direction.
Further, the first embodiment discloses a body handle type jigsaw in which a non-slip portion is formed on an upper portion of a housing in the main body portion and the non-slip portion is gripped by an operator. In this jigsaw, the housing (body) itself becomes a handle and becomes relatively small in the vertical direction, so that the length of the main body is relatively large, and the battery pack is mounted on the lower surface of the rear part of the housing.

Japanese Unexamined Patent Publication No. 2012-121116 Japanese Unexamined Patent Publication No. 2012-110977 Japanese Unexamined Patent Publication No. 2014-4666 Japanese Unexamined Patent Publication No. 8-244005 Japanese Unexamined Patent Publication No. 2012-111021 Japanese Unexamined Patent Publication No. 2015-24489 Japanese Unexamined Patent Publication No. 2013-223899

In the jigsaw of Patent Document 1, since the blowout passage is formed between the cover member and the outer surface of the housing, the structure becomes complicated, and the blowout port and the dust collection port are far from the blade.
In the jig saw of Patent Document 2, the structure is complicated because the shutter member is arranged, and since the blowout nozzle is arranged in the center in the left-right direction, the area where exhaust and dust collection act is relatively narrow. When the rotation speed of the fan is low, the strength of the blowout becomes relatively weak.
In the jigsaw of Patent Document 3, since the outlet is not provided, the cutting debris cannot be blown off, and the dust collection efficiency is relatively poor.
In the dust suction device of Patent Document 4, since the outlet is not provided, the cutting debris cannot be blown off, the dust collection efficiency is relatively poor, and the dust collection nozzle is arranged only on the right side or the left side. The area where dust collection acts is biased.
Therefore, one of the main purposes of the related invention is to provide a jigsaw having a simple structure, and the jigsaw has a wide area where at least one of air blowing and dust collection acts, and its efficiency is good. Is to provide.

Further, in the jigsaws of Patent Documents 5 and 6, since the base is directly bolted to the housing, the vibration between the base and the housing is relatively relatively large due to the rattling of the bolt and the bending of the housing near the bolt. It is easy to occur.
Therefore, one of the main objects of the present invention is to provide a jigsaw in which the base is attached more firmly to the housing and vibration in the base and the housing is suppressed.

Further, when an independent handle is desired, if the battery pack is arranged behind the rear end surface of the housing and the rear end surface of the handle as in the jigsaw of the second form of Patent Document 7, when the battery pack is not attached. Compared to this, the front-rear length of the jigsaw when attached is longer, and when a battery pack with a larger capacity is attached, the front-rear length of the jigsaw becomes longer than when a battery pack with a smaller capacity is attached.
Therefore, one of the main purposes of the related invention is that in the top handle type in which an independent handle is provided on the upper part of the electric motor, the front-rear length is almost the same even if batteries of various capacities are attached or removed. The purpose is to provide a jigsaw that is easy to handle without change.

In order to achieve the above object, the invention according to claim 1 supports a jigsaw main body having a resin housing, a motor and a drive portion arranged inside the housing, and the jigsaw main body so as to be tiltable to the left and right. The base, the fastening member that presses the jigsaw main body toward the base, the base, the jigsaw main body, and the fastening member, and the jigsaw main body is pulled against the base by axial tension. The fastening member is provided with a fastener for fixing the fastener, and the fastening member has a pressing surface extending in the front-rear direction and an upright portion that stands upright in the vertical direction and extends in the front-back direction. The upright portion is in contact with the inner surface of the housing, and is characterized in that a screw extending in the left-right direction is arranged between the front portion and the rear portion of the upright portion .
The invention according to claim 2 is a jigsaw main body having a resin housing, a motor and a drive portion arranged inside the housing, a base that supports the jigsaw main body so as to be tiltable to the left and right, and the jigsaw main body. A fastening member that presses the jigsaw body toward the base, and a fastener that penetrates the base, the jigsaw main body, and the fastening member, and fixes the jigsaw main body to the base by axial tension. The fastening member has a pressing surface extending in the front-rear direction, and has an upright portion that stands upright in the vertical direction and extends in the front-rear direction, and the front end portion of the upright portion has a standing portion. It is characterized in that it is adjacent to a pad rib formed on the housing .
The invention according to claim 3 comprises a jigsaw main body having a resin housing, a motor and a drive portion arranged inside the housing, a base that supports the jigsaw main body so as to be tiltable to the left and right, and the jigsaw main body. A fastening member that presses the jigsaw body toward the base, and a fastener that penetrates the base, the jigsaw main body, and the fastening member, and fixes the jigsaw main body to the base by axial tension. The fastening member has a pressing surface extending in the front-rear direction, and also has an upright portion that stands upright in the vertical direction and extends in the front-rear direction, and the front end portion of the fastening member is provided. It is adjacent to the contact rib formed in the housing, and the contact rib is a part of an exhaust passage .
The invention according to claim 4 is characterized in that, in the above invention, the fastening member extends to the rear of the fastener.
According to the fifth aspect of the present invention, in the above invention, the length of the fastening member in the front-rear direction on the pressing surface is at least half the length in the front-rear direction of the contact surface between the jigsaw main body and the base. It is characterized by.
The invention according to claim 6 is characterized in that, in the above invention, the fastening member is a metal plate having a bent portion.
The invention according to claim 7 is characterized in that, in the above invention, the fastening member is U-shaped when viewed from the front.
The invention according to claim 8 is characterized in that, in the above invention, the fastening member has a fastener overlapping portion that penetrates the fastener so as to overlap in a side view. ..
In the invention according to claim 9, in the above invention, a small piece portion is formed at least one of a front end portion and a rear end portion of the fastening member, and a small piece receiving portion for receiving the small piece portion is formed in the housing. It is characterized by being done.
The invention according to claim 10 is characterized in that, in the above invention, the small piece receiving portion is arranged above and below the small piece portion.

Further, the related invention has a left housing and a right housing, and a housing in which a motor and a drive unit are arranged inside, a centrifugal fan arranged inside the housing, and the left housing and the right housing. At least one inner surface, which extends from the lower side to the front of the centrifugal fan, is arranged so as to be continuous with the groove portion formed so as to be recessed outward in the left-right direction and the groove portion inside the housing. The guide member is provided, and the groove portion and the guide member form an exhaust passage toward the front through which the exhaust of the centrifugal fan passes, and the exhaust port opens toward the front. Is.
Further, the related invention is characterized in that, in the above invention, the guide member has a partition portion for branching the exhaust passage to the left and right.
Further, a related invention is characterized in that, in the above invention, the guide member has a dust collecting intake port penetrating in the front-rear direction.
Further, in the related invention, in the above invention, the controller for controlling the motor is provided, and a cooling intake port for cooling the motor is arranged in a portion of the housing behind the motor. The controller is characterized in that it is arranged in a posture along a virtual straight line passing through the centrifugal fan and the cooling intake port.
Further, in the related invention, in the above invention, the battery for driving the motor is arranged behind the motor, and the dust suction adapter connected to the hose of the dust collector is attached / detached below the battery. It is characterized by being arranged in a possible manner.
Further, a related invention is characterized in that, in the above invention, the dust absorbing adapter has a bent portion connecting the front portion and the rear portion so that the rear portion is downward with respect to the front portion thereof.
Further, in the above invention, the related invention includes a base connected to the housing below the housing by a fastening member exhibiting conductivity arranged inside the housing, and the dust absorbing adapter is in an attached state. The present invention is characterized in that it comes into contact with the fastening member.

In addition, in a jigsaw, a jigsaw main body having a housing and a motor and a drive unit arranged inside the housing, a handle above the jigsaw main body and above the motor, and a battery. The battery includes a battery having a side mounting surface and supplying power to the motor, and a battery mounting portion provided on the jigsaw main body and having a battery mounting portion side mounting surface. Can be mounted on the battery mounting portion in a state where the battery mounting portion side mounting surface and the battery side mounting surface face each other by sliding in a direction along the battery mounting portion side mounting surface, and the battery can be mounted on the battery mounting portion. It is characterized in that it is attached to the battery attachment portion so that the battery side attachment surface is on the upper side.
Further, a related invention is characterized in that, in the above invention, the battery overlaps with the motor in a front view in a state of being attached to the battery mounting portion.
Further, the related invention is characterized in that, in the above invention, the battery overlaps with the handle in a top view in a state of being attached to the battery mounting portion.
Further, in the above invention, the related invention includes a plate-shaped controller for controlling the motor, and the controller is in a posture along the battery side mounting surface of the battery mounted on the battery mounting portion. It is characterized in that it is arranged above the battery.
Further, a related invention is characterized in that, in the above invention, the controller overlaps with the handle in a top view.

One of the main effects of the present invention is to provide a jigsaw that allows the base to be more firmly attached to the housing and suppresses vibrations in the base and housing.
One of the main effects of the related invention is to provide a jigsaw having a simple structure, and a jigsaw having a wide area where at least one of air blowing and dust collection acts and its efficiency is good. To be offered.
One of the main effects of the related invention is that in the top handle type in which an independent handle is provided on the upper part of the electric motor, the front-rear length is almost the same even if batteries of various capacities are installed or removed. It is to provide a jigsaw that is easy to handle.

It is a perspective view of the jigsaw which concerns on 1st Embodiment of this invention. It is a front view of FIG. It is a central vertical sectional view of FIG. It is a front enlarged view of FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. FIG. 3 is a cross-sectional view taken along the line CC of FIG. It is a DD vertical line sectional view of FIG. FIG. 3 is a cross-sectional view taken along the line DD of FIG. FIG. 3 is a cross-sectional view taken along the line EE of FIG. FIG. 3 is a perspective view of the left housing, the right housing, and the guide member in FIG. It is a perspective view of the left housing of FIG. 3 is a top view of the base holder, a right side view of the base holder, a front view of the base holder, and a perspective view of the base holder in FIG. It is a perspective view of the jigsaw which concerns on the 2nd form of this invention. It is a front view of FIG. It is a central vertical sectional view of FIG. FIG. 16 is an enlarged front view of FIG. FIG. 16 is a cross-sectional view taken along the line FF of FIG. 16 is a cross-sectional view taken along the line GG of FIG. FIG. 16 is a cross-sectional view taken along the line HH of FIG. FIG. 16 is a cross-sectional view taken along the line II of FIG. 16 is a cross-sectional view taken along the line JJ of FIG. 16 is a cross-sectional view taken along the line KK of FIG. 16 is a perspective view of the left housing, the right housing, and the guide member in FIG. It is a perspective view of the left housing of FIG.

Hereinafter, embodiments of the present invention and examples of modifications thereof will be described as appropriate with reference to the drawings.
The front, back, up, down, left, and right in the form and the modified example are defined for convenience of explanation, and may change depending on the usage situation, the state of the moving member, and the like.
Further, the present invention is not limited to the following forms and modifications.

[First form]
1 is a perspective view of a rechargeable jig saw 1 as an example of a cutting machine according to a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a central vertical sectional view of FIG. Yes, FIG. 4 is an enlarged front view of FIG. 3, FIG. 5 is a sectional view taken along line AA of FIG. 3, FIG. 6 is a sectional view taken along line BB, and FIG. 7 is a sectional view taken along line CC. 8A is a cross-sectional view taken along the line DD, FIG. 9 is a cross-sectional view taken along the horizontal line DD, and FIG. 10 is a cross-sectional view taken along the line EE. The right side of FIG. 3 is in front of the jigsaw 1, the upper part of FIGS. 2 and 3 is above the jigsaw 1, and the right side of FIG. 2 is the left side of the jigsaw 1.

The jigsaw 1 has an internal mechanism (including a member partially exposed from the housing) inside the housing 2 which is an outer shell.
The internal mechanism of the jigsaw 1 includes a power unit 3, a power transmission unit 4 as a reciprocating mechanism, a slider 8 as a driving unit that can be mounted with a blade 6 and can move up and down (reciprocating up and down). An orbital motion mechanism 10 that swings the vertically moving blade 6 in the front-rear direction to move on an elliptical trajectory, a counter weight 12 for the vertically moving blade 6 and the slider 8, and a base 14 are included.

The housing 2 is made of resin (synthetic resin) and is divided into left and right halves, and has a left housing 15 and a right housing 16.
The housing 2 includes a housing base 17 in which a power unit 3, a power transmission unit 4, a slider 8, an orbital motion mechanism 10, and a counterweight 12 are arranged inside, and a handle formed above the housing base 17 (power unit 3). It includes a part 18.
The housing 2 and an internal mechanism arranged at least a part inside the housing 2 constitute a jigsaw 1 main body P (jigsaw main body), and a handle 18 and an internal mechanism arranged inside the housing 2 form a jigsaw 1 handle Q. Constitute. The jigsaw 1 is a top handle type in which the handle Q is arranged above the power unit 3. The handle Q may be composed of only the handle portion 18 of the housing 2, that is, the internal mechanism may not be arranged on the handle portion 18.

A battery mounting portion 20 having a battery connecting terminal 19 is arranged on the lower surface of the rear portion of the housing base 17. The battery mounting portion 20 has a battery mounting portion side mounting surface M that extends in the front-rear and left-right directions (slightly diagonally in a rearward rising state) and faces downward, and the battery is connected to the battery mounting portion side mounting surface M. The terminal 19 is arranged.
The battery 21 is attached to the battery attachment portion 20. The battery 21 is a rechargeable secondary battery, and has a battery-side mounting surface N formed so as to correspond to the battery-side mounting surface M.
The battery terminal 22 is arranged on the battery-side mounting surface N so as to correspond to the battery connection terminal 19. The battery 21 is moved forward to the battery mounting portion 20 by sliding forward along the battery mounting portion side mounting surface M with the battery side mounting surface N located on the upper surface and the battery terminal 22 located on the upper surface. It is attached. When the battery 21 is attached to the battery mounting portion 20, the battery side mounting surface N faces upward with the battery mounting portion side mounting surface M, and the battery terminal 22 is electrically connected to the battery connection terminal 19 of the battery mounting portion 20. Connected to. The battery 21 is a power supply source for the power unit 3.
The battery 21 has a battery claw 23 that is interlocked with a battery lever (not shown) provided so as to be partially exposed so as to be movable downward while being urged upward at the rear portion, and the battery mounting portion 20 is upward. It has a battery claw receiving portion 24 at the rear portion that receives the battery claw 23 when the battery 21 is attached. The battery 21 is removed from the battery mounting portion 20 by lowering the battery lever to separate the battery claw 23 from the battery claw receiving portion 24 and sliding it backward.

Above the battery mounting portion 20, plate-shaped controllers 25 that are vertically thinner than the front, rear, left, and right are arranged. The controller 25 extends forward, backward, left and right, and is in a posture along the battery-side mounting surface N of the battery 21 mounted on the battery mounting portion 20. The controller 25 is electrically connected to the battery 21 attached to the battery mounting portion 20 via the battery terminal 22 or the battery connection terminal 19. The control circuit board 25a is housed in the controller 25 in the same posture as the controller 25.
The controller 25 is arranged at the same position as a part (rear part) of the handle Q in the front-rear direction, and overlaps with the handle Q in the top view.

A battery 21 (not shown) having a capacity larger than that of the illustrated battery 21 can also be slidably attached to the battery attachment portion 20. The large-capacity battery 21 also has a battery-side mounting surface N and a battery terminal 22, and is mounted in a state where the battery-side mounting surface N is on the upper side and faces the battery-side mounting surface M.
The large-capacity battery 21 and the illustrated battery 21 (battery for power tools) have dimensions in the front-rear direction (longitudinal direction) in the illustrated state of the battery 21 as large as possible, and in the left-right direction and the up-down direction (thickness). The dimensions in the direction) are formed so as to be different from each other depending on the size of the capacitance. That is, the large-capacity battery 21 has the same size in the front-rear direction as the illustrated battery 21, and has a size in the left-right direction and the up-down direction (particularly the latter) larger than the illustrated battery 21. ing.

A switch 26 is arranged inside the handle portion 18, and a trigger 27 for switching the switch 26 is connected to the switch 26. The lower part of the trigger 27 is exposed downward from the lower part of the handle portion 18.
A button-type lock-on switch 28 is arranged on the left side of the switch 26. The button portion of the lock-on switch 28 is exposed from the left surface of the left housing 15 above the trigger 27 of the handle portion 18.
Further, a button switching type standby switch 29 is arranged on the front upper side of the housing 2 (housing base 17 in front of the front end of the handle portion 18). The button portion of the standby switch 29 is exposed on the upper surface of the housing 2.
In addition, the speed adjustment dial 30 is arranged above the left side of the battery mounting portion 20 at the rear portion of the housing base 17 and below the left side of the rear lower end of the handle portion 18 with a part exposed from the housing 2. ing.

The power unit 3 has an electric (DC) motor 32 arranged inside the central portion of the housing base 17.
The motor 32 is arranged in front of the battery mounting portion 20 and the battery 21. The battery 21 attached to the battery mounting portion 20 is arranged at the same height as the motor 32 in the vertical direction, and overlaps with the motor 32 in the front view. Further, the battery 21 attached to the battery mounting portion 20 is arranged at the same position as a part (rear portion) of the handle Q in the front-rear direction, and overlaps with the handle Q in the top view.
The motor 32, the switch 26, the lock-on switch 28, the standby switch 29, and the speed adjustment dial 30 are electrically connected to the controller 25 (control circuit board 25a) by a lead wire (including a connector as appropriate) (not shown). The controller 25 (control circuit board 25a) controls the drive of the motor 32.
The motor 32 is a brushless motor and has a rotor 33 that rotates around an axis and a stator 34 that is fixed to the housing 2.

The rotor 33 includes a motor shaft 35 which is a rotation shaft of the motor 32, a rotor core 36 which is integrally provided with the motor shaft 35 at the center of the motor shaft 35, and a plurality of (4) magnets 37.
Teeth are formed at the front end of the motor shaft 35.
The front portion of the motor shaft 35 is rotatably supported by the front bearing (ball bearing) 38, and the rear end portion of the motor shaft 35 is rotatably supported by the rear bearing (ball bearing) 39.
The front bearing 38 is held in the housing 2 via the bearing case 40, and the rear bearing 39 is held in the housing 2.

On the rear side of the front bearing 38, a centrifugal fan 41 that pushes air outward in the radial direction by rotation is fixed to the motor shaft 35.
Further, in the rear portion of the left housing 15 of the motor 32 (rear side of the rear bearing 39), a plurality of cooling intake ports 42a which are slit-shaped in the front-rear direction and are arranged vertically are opened, and the right housing A cooling intake port 42b, which has a slit shape in the front-rear direction, is opened on the side of the battery mounting portion 20 in No. 16 (FIG. 11).
The controller 25 is arranged in a posture along a virtual straight line X (FIG. 3) passing through the centrifugal fan 41 and the cooling intake port 42b.

The stator 34 includes a tubular stator core 43 whose axial direction is the front-rear direction, a disk-shaped first insulating member 44 arranged on the front side of the stator core 43, and a disk arranged on the rear side of the stator core 43 or in the stator core 43. It includes a second insulating member 45 having a shape, and a plurality of (here, six) coils 46, 46, which are wound around the stator core 43 via the first insulating member 44 and the second insulating member 45.
A disk-shaped sensor substrate 47 is installed on the rear side of the second insulating member 45 by inserting a screw 48 into the second insulating member 45. A hole through which the motor shaft 35 passes is formed in the central portion of the sensor substrate 47. The sensor substrate 47 has a plurality of (three in this case) rotation detection elements (not shown) as rotation detection sensors for detecting the rotation position of the rotor 33. The rotation detection elements are magnetic sensors, and are arranged at equal intervals in the circumferential direction on the upper front surface of the sensor substrate 47.
The coils 46, 46 ... Are electrically connected to each other in a predetermined connection mode (delta connection), and are further electrically connected to the controller 25 via the terminal portion 49.

The controller 25 has a switching element (not shown) that sequentially switches the power supply to each coil 46 of the stator 34 in a predetermined manner, and when the switch 26 is turned on, the rotation state of the rotor 33 from the sensor board 47 is changed. Acquired, a control signal is transmitted by a control circuit composed of a microcomputer according to the rotation state of the rotor 33, and a current is sequentially passed to each coil 46 by a drive circuit composed of a switching element, and the rotor is passed through a magnet 37. Perform 33 rotations.
Further, the controller 25 is equipped with an auto stop circuit (not shown) that cuts off the power supply to the motor 32 so as not to be over-discharged or over-current depending on the detection result of the state of the battery 21.

The power transmission unit 4 projects forward from the intermediate gear 50, the support shaft 51 in the front-rear direction passing through the central portion of the intermediate gear 50, and the front peripheral edge of the intermediate gear 50 via the shaft 52 and the bearing (needle bearing) 53. It has a guide roller 54, which is arranged so as to perform.

The intermediate gear 50 is arranged above the motor shaft 35 and is rotatably supported with respect to the support shaft 51. Bearings (needle bearings) 55 and 55 are interposed between the intermediate gear 50 and the support shaft 51. The bearings 55 and 55 are arranged in the front-rear direction, the rear end abuts on the front surface of the bearing case 40, and the front end is pressed by the circlip 56.
The intermediate gear 50 integrally includes a tooth portion 60, a counterweight cam portion 61, and a push plate cam portion 62 in this order from the front.
The tooth portion 60 has a disk shape and has teeth on the outer periphery that mesh with the teeth at the tip of the motor shaft 35.
The counterweight cam portion 61 has a disk shape having a smaller diameter than the tooth portion 60, and is eccentrically arranged on the rear surface side of the tooth portion 60.
The push plate cam portion 62 has a disk shape having a smaller diameter than the counterweight cam portion 61, and is arranged eccentrically with respect to the tooth portion 60 on the rear surface side of the counterweight cam portion 61.
Since the diameter (number of teeth) of the tooth portion 60 of the intermediate gear 50 is larger than the diameter (number of teeth) of the motor shaft 35 of the motor 32, the rotation of the motor shaft 35 is decelerated by the intermediate gear 50.
The support shaft 51 has a front end portion supported by the housing 2 and a rear end portion in a hole in the front-rear direction formed in the bearing case 40 (above the front bearing 38). The support shaft 51 passes through the center of the tooth portion 60.

The guide roller 54 is attached at a position eccentric with respect to the rotation center of the tooth portion 60 of the intermediate gear 50.
The guide roller 54 is eccentric to the side opposite to the counterweight cam portion 61 and the push plate cam portion 62 of the intermediate gear 50, that is, the counterweight cam portion 61 and the push plate cam portions 62 and 180 in the rotation direction of the tooth portion 60. It is arranged so that it has an angle of °.
The shaft 52 of the guide roller 54 is attached to the peripheral edge of the intermediate gear 50 so as to project forward from the front portion thereof, and is rotatably supported by the bearing 53.

The slider 8 moves up and down by receiving the power of the power unit 3 transmitted via the power transmission unit 4 by receiving the guide roller 54 so as to be reciprocally movable to the left and right.
The slider 8 has a slider body 69. The slider body 69 is a plate-shaped member that extends vertically and horizontally.
The slider main body 69 has a hole 70 extending in the left-right direction in the central portion, and the hole 70 contains a guide roller 54. The guide roller 54 can move along the hole 70 by rotating in the hole 70 of the slider main body 69.
When the intermediate gear 50 rotates and the guide roller 54 is displaced (revolved), the vertical displacement component of the guide roller 54 is transmitted to the slider body 69. Therefore, the slider body 69 moves up and down via the guide roller 54. The displacement component in the left-right direction in the revolution of the guide roller 54 is not transmitted to the slider main body 69 because the guide roller 54 rotates in the hole 70 of the slider main body 69 and reciprocates left and right.

Further, the slider 8 includes a tubular blade guide 71 having a narrow hole for receiving the upper end portion of the blade 6 at the lower end portion, and a blade clamp 72 and a plate 73 for sandwiching the upper end portion of the blade guide 71 in the front-rear direction. There is.
The blade guide 71 receives the blade 6 in the narrow hole and holds the blade 6.
A spring 74, which is an elastic body, is contained in the upper end of the narrow hole of the blade guide 71, and the blade 6 pushed in the front-rear direction by the orbital motion mechanism 10 swings while being held by the blade guide 71. Tolerate.
The blade clamp 72 and the plate 73 are fixed to each other with the slider body 69 and the blade guide 71 sandwiched between them, and connect the slider body 69 and the blade guide 71. The blade clamp 72, the plate 73, and the blade guide 71 holding the blade 6 move up and down together with the slider body 69.

A columnar slider guide 75 having a slit in the center is arranged adjacent to the upper portion of the slider main body 69. The slit of the slider guide 75 contains an upper portion of the slider main body 69 (a portion above the hole 70 and having a smaller size (width) in the left-right direction than the hole 70). The slider guide 75 is attached to the housing 2.
Further, a cylindrical slider support 76 and a ring-shaped seal member 78 below the cylindrical slider support 76 are arranged adjacent to the lower portion of the slider main body 69. The slider support 76 and the seal member 78 are attached to the housing 2, respectively.
The slider support 76 is arranged below the motor shaft 35, and the lower portion of the slider main body 69 is inserted in the central hole thereof.
The sealing member 78 is an elastic body (polyurethane sponge), and the lower portion of the slider main body 69 is contained in the central hole thereof. The seal member 78 is arranged above the top dead center of the blade guide 71 (the upper end of the range of vertical movement, the state shown in each figure).
In front of the blade guide 71 and the blade 6, a guard 79 made of a wire that is bent in a U shape in front view and extends vertically is arranged. The upper end of the guard 79 is supported by the housing 2. There is. The guard 79 is omitted in FIG.

The orbital motion mechanism 10 is arranged above the push plate 80 that moves up and down in conjunction with the push plate cam portion 62 of the intermediate gear 50, the roller holder 82 that is arranged below the push plate 80, and the roller holder 82. It has a switching lever 84 and a back roller 86 rotatably supported by the roller holder 82 via a shaft 85.
The push plate 80 is a plate-shaped member that extends vertically and horizontally. The push plate 80 has a hole having a size equivalent to that of the push plate cam portion 62 at the upper portion, and the push plate cam portion 62 is contained in the hole, that is, the push plate cam portion 62 is connected to the push plate cam portion 62 at the upper portion. There is. When the intermediate gear 50 rotates and the push plate cam portion 62 rotates, the push plate 80 also rotates (moves up and down or moves left and right) around the upper hole. Since the push plate cam portion 62 has a relatively small amount of eccentricity, the amount of movement of the push plate 80 is also relatively small.
The roller holder 82 has a J-shaped side view and a pair of plate-shaped hold portions 87 and 87 that bend forward, and an arm piece 88 that extends rearward in common from the upper portions of the hold portions 87 and 87. The roller holder 82 is swingably supported by a pin 89 at the upper end of the hold portion 87. The pin 89 is fixed to the housing 2. Further, the back roller 86 is arranged in the lower front portion of the hold portion 87. Further, the lower end portion of the push plate 80 can be brought into contact with the upper side of the arm piece 88. Due to the vertical movement of the push plate 80, the lower end of the push plate 80 repeatedly pushes the arm piece 88, and the roller holder 82 swings around the pin 89.
The switching lever 84 extends in the left-right direction and is connected to a semi-cylindrical switching lever main body 90 arranged in the housing and the left end of the switching lever main body 90, and is exposed from the housing 2. It has an operation unit 91 and. When the switching lever 84 is operated so that the curved surface of the switching lever main body 90 is turned down (the flat surface is turned up), the curved surface hits the upper part of the arm piece 88, and the roller holder 82 is restricted from swinging. On the other hand, when the switching lever 84 is operated so that the curved surface of the switching lever main body 90 faces upward (the state of FIGS. 3 and 4), the switching lever 84 separates from the upper part of the arm piece 88 and allows the roller holder 82 to swing. To do.
The back roller 86 can rotate along the rear side of the blade 6 and can push the blade 6 from behind.
When the switching lever 84 is switched so as to allow the roller holder 82 to swing, it is eccentric to the side opposite to the mounting position of the push plate cam portion 62 and the guide roller 54. Therefore, when the slider 8 moves upward, When the push plate 80 descends and the back roller 86 swings forward via the roller holder 82 and the slider 8 moves downward, the push plate 80 rises and the back roller 86 moves backward from the swing forward position. It returns to the swing start position. Therefore, the back roller 86 pushes the blade 6 forward as the blade 6 rises, and does not push the blade 6 when the blade 6 descends, causing the blade 6 to orbitally move.

The counterweight 12 has a balance plate 100 that moves up and down in conjunction with the counterweight cam portion 61 of the intermediate gear 50.
The balance plate 100 is a plate-shaped member thicker than the push plate 80, extends vertically and horizontally, and is arranged on the front side of the push plate 80. A bulging portion 101 that bulges forward is formed on the upper portion of the balance plate 100, and the weight of the balance plate 100 is increased by that amount (at the upper portion opposite to the blade 6 below).
The central portion of the balance plate 100 is sandwiched between the tooth portion 60 of the intermediate gear 50 and the push plate 80, and the push plate 80 is sandwiched between the balance plate 100 and the bearing case 40.
The balance plate 100 has a cam hole 102 at the center. The left-right size of the cam hole 102 is set to allow the rotary movement (movement in the left-right direction) of the counterweight cam portion 61, that is, the maximum eccentric portion of the counterweight cam portion 61 is left (right). Even in this state, the counterweight cam portion 61 has a size that allows it to be positioned in the cam hole portion 102.
When the intermediate gear 50 rotates and the counter weight cam portion 61 is displaced, the vertical displacement component of the counter weight cam portion 61 is transmitted to the cam hole portion 102, and the balance plate 100 moves up and down. The displacement component of the counterweight cam portion 61 in the left-right direction is not transmitted to the balance plate 100 because the counterweight cam portion 61 slides in the cam hole portion 102.
The weight of the balance plate 100 is set as follows. That is, the weight of the balance plate 100 and the weights of the blade 6 and the slider 8 are set to be balanced.

The counterweight cam portion 61 and the guide roller 54 are eccentric to the opposite side of the mounting position. Therefore, when the slider 8 moves up, the balance plate 100 moves down (as shown), and when the slider 8 moves down, the balance plate 100 moves up, and so on, which are different from each other (180 ° different). Move up and down (in phase). Therefore, the slider 8 and the balance plate 100 move up and down so as to have a symmetrical positional relationship with respect to the horizontal plane in between them. The bulging portion 101 of the balance plate 100 is arranged above the side opposite to the blade 6, and the weight balance of the balance plate 100 is adjusted.
The weights of the slider 8 and the blade 6 and the weight of the counterweight 12 are substantially the same.
From these facts, the vibration generated by the vertical movement of the slider 8 is canceled and suppressed by the vertical movement of the balance plate 100 (counterweight 12).

A guide member 110 for guiding air is provided on the lower front side of the housing 2, and a base holder 112 as a fastening member for fixing the base 14 is provided on the rear side.
11 is a perspective view of the left housing 15, the right housing 16, and the guide member 110, FIG. 12 is a perspective view of the left housing 15, and FIG. 13 is a top view of the base holder 112 (a) and a right side surface (b). It is a figure, (c) a front view, and (d) a perspective view. The right side of FIGS. 13A and 13B, or the lower right side of FIG. 13D is the front.

The base holder 112 is U-shaped when viewed from the front, Ω-shaped when viewed from the side, is made of metal, and exhibits conductivity.
At the central portion of the base holder 112, connecting portions 120 and 120 that connect the upper portions of the pair of upright walls in the front portion 116 having a U-shaped cross section and the rear portion 118 having a U-shaped cross section are arranged. The left and right portions of the front portion 116, the connecting portions 120, 120 to the rear portion 118 extending in the front-rear direction and standing up and down in the vertical direction form an upright portion, and are between the front portion 116 and the rear portion 118 and are connected portions. Between 120 and 120, a fastener overlapping portion is formed. The front portion 116 and the rear portion 118 of the base holder 112 have bent portions in the front-rear direction on the left and right. The base holder 112 is formed by bending or drawing (including beads) on a portion of the sheet metal that becomes a bent portion.
A front small piece 122 that protrudes forward with respect to other parts is formed on the front side of the bottom of the front portion 116 of the base holder 112, and another on the rear side of the bottom of the rear portion 118 of the base holder 112. A rear small piece 124 is formed so as to project rearward with respect to the portion.
In the front upper part of the pair of upright walls in the front part 116 of the base holder 112, inclined portions 125 and 125 which are in a squared state and are lowered forward are formed.
A bolt hole 126 as a fastening hole is formed in the bottom of the front portion 116 of the base holder 112.

The base holder 112 is held by a left holder case portion 130 protruding to the right at the lower side of the left housing 15 and a right holder case portion (not shown) protruding to the left at the lower side of the right housing 16. Hereinafter, the description of the left holder case portion 130 also applies to the right holder case portion, unless otherwise specified. The left holder case portion 130 and the right holder case portion are combined to form a holder case portion.
The left holder case portion 130 extends from front to back and left and right, and front ribs 132 having a side view r shape extending upward and rearward are formed at the front end portions thereof, and side view r extending upward and forward at the rear end portion. A letter-shaped rear rib 134 is formed. The front rib 132 (and the front rib of the right housing 16) of the left holder case portion 130 contains a front small piece portion 122. The front small piece portion 122 is in contact with the front rib 132 or the lower upper surface front end portion (front small piece receiving portion) of the holder case portion, and the front small piece receiving portion is arranged above and below the front small piece portion 122. Similarly, the rear small piece portion 124 is contained in the rear rib 134 or the lower upper surface rear end portion (rear small piece receiving portion) of the holder case portion, and the rear small piece receiving portion is arranged above and below the rear small piece portion 124. There is. The front portion of the front rib 132 is formed as an inclined portion 135 that protrudes forward as it goes down. The inclined portion 135 is continuous with the extension line of the inclined portion 125 of the base holder 112.
Further, a plurality of screw bosses 136, 136 ... Are formed in the left housing 15, and corresponding screw holes 138, 138 ... Are formed in the right housing 16, and screws 140 are formed in the overlapping screw holes 138 and the screw boss 136. Where the left housing 15 and the right housing 16 are fixed to each other by inserting, the screw boss 136 is arranged on the upper side of the central portion of the left holder case portion 130. A screw hole 138 is arranged on the upper side of the center portion of the right holder case portion. The screw boss 136 is arranged below the connecting portion 120 of the base holder 112, and the base holder 112 has a shape that avoids the screw boss 136.
A left bolt hole 141 having a semi-cylindrical space is formed in a portion of the left holder case portion 130 in front of the screw boss 136, and by combining with the right bolt hole similarly formed in the right holder case portion, the right bolt hole 141 is formed. Bolt holes with a columnar space are formed. The bolt hole 126 of the base holder 112 overlaps the upper side of the bolt hole.
The upright portion of the base holder 112 is in contact with the inner surfaces of the housing 2 on the upper left and right sides of the holder case portion, but part or all of the upright portion may not be in contact with the inner surface of the housing 2.
A left pin support portion 142 for supporting the pin 89 of the roller holder 82 is formed in front of the front rib 132 of the left holder case portion 130 and at the front lower corner portion of the left housing 15, and similarly to the right. A right pin support portion 143 for supporting the pin 89 of the roller holder 82 is formed at the front lower corner portion of the housing 16 .

The base 14 is a plate-shaped member having a substantially flat lower surface, and has a dome portion 144 that bulges upward at a central portion. The upper surface of the dome portion 144 is formed on a semi-cylindrical surface whose axial direction is the front-rear direction, and the dome portion 144 has an upper surface that is straight in the front-rear direction and bends in the left-right direction. At the center of the upper surface of the dome portion 144, a slit portion 145 formed in a cross shape in a top view and extending back and forth and left and right is formed.
The base 14 is fixed to the base holder 112 on the P side of the main body of the jigsaw 1 by using a metal clamp plate 146 and bolts 147 (fasteners) that are inverted U-shaped when viewed from the front.
That is, with the clamp plate 146 arranged under the slit portion 145 in the dome portion 144 of the base 14, the bolt hole and the slit portion 145 formed in the central portion of the clamp plate 146 and the left holder case portion of the housing 2 The bolt 147 is inserted into the bolt hole 126 of the base holder 112 so that the bolt 147 is passed through the left bolt hole 141 and the right bolt hole of the 130, and the base 14 is fastened to the main body P. The periphery of the slit portion 145 of the dome portion 144 is sandwiched between the clamp plate 146 and the lower surface of the holder case portion of the housing 2, and the base 14 is fixed to the housing 2. The bolt 147 penetrates the dome portion 144 of the housing 2 and the base 14, and exerts a tensile force in its own axial direction by entering the bolt hole 126, and the base 14 is fixed to the main body portion P of the jigsaw 1 by the tension. To do.
When the bolt 147 is passed through the slit portion 145 in the front-rear direction, the posture of the main body P of the jigsaw 1 becomes perpendicular to the base 14, and the bolt 147 is passed through an arbitrary portion in the front-rear direction. The main body P slides back and forth with respect to the base 14.
Further, when the bolt 147 is passed through the left side of the slit portion 145, the posture of the main body portion P of the jigsaw 1 is tilted to the left with respect to the base 14, and when the bolt 147 is passed through the right side of the slit portion 145, the base 14 is passed. The posture of the main body P of the jigsaw 1 is tilted to the right.
That is, the main body P of the jigsaw 1 can be fixed to the base 14 by adjusting the relative position in the front-rear direction with respect to the base 14 and the inclination in the left-right direction, and can be moved in the front-rear direction, and can be moved in the left-right direction. It can be tilted.
The base holder 112 extends back and forth, especially rearward, with respect to the bolt 147 passed through the bolt hole 126 of the front portion 116 of the base holder 112.
When the main body P of the jigsaw 1 and the base 14 are fastened, the outer surface (lower surface, left surface, right surface) of the front portion 116 of the base holder 112 and the outer surface of the rear portion 118 serve as pressing surfaces, and the base holder 112 becomes the jigsaw 1 The main body portion P (holder case portion) of the above is pressed toward the base 14 (downward). Further, the main body portion P and the base 14 have contact surfaces extending in the front-rear direction on the lower surface of the housing 2 and the upper surface of the dome portion 144 , and the lengths of the pressing surface of the base holder 112 in the front-rear direction (front portion 116 and rear portion). The total length of 118) is set to be at least half the length of the contact surface between the main body P and the base 14 in the front-rear direction. Further, the bolt 147 penetrates the fastener overlapping portion of the base holder 112, and the bolt 147 and the base holder 112 overlap in a side view.

In the left housing 15, a lower surface portion 152 of the left motor case portion 150 is arranged between the base holder 112 and the motor 32. In the right housing 16, the right motor case portion 150R (FIGS. 5, 6 and 8) is similarly formed, and the motor case portion is formed together with the left motor case portion 150.
The left motor case portion 150 has a lower surface portion 152 projecting inward and a front surface portion 154 extending upward from the front side portion of the lower surface portion 152, and the right motor case portion 150R also has a lower surface portion. It has 152R and a front surface portion 154R, and a part of the motor 32 is arranged inside the motor case portion. The motor shaft 35 penetrates the front portions 154 and 154R, and the centrifugal fan 41 and the front bearing 38 are arranged in front of the front portions 154 and 154R (outside the motor case portion).
It projects inward from the inner surface of the left housing 15 from the lower side of the front portion 154 of the left motor case portion 150 to the upper side of the inclined portion 135 of the left holder case portion 130 and the upper side of the left pin support portion 142 of the left housing 15. The lower left rib 155 is arranged. The lower left rib 155 is lower in the left-right direction than the front portion 154. Further, the lower left rib 155 is formed in a front-down arc shape in a portion from the lower side of the front surface portion 154 to the upper side of the inclined portion 135, and the arc-shaped portion is along the inclined portion 135. Further, on the upper side of the lower left rib 155 (lower side of the switching lever main body 90), the lower left adjacent rib 156 which has a predetermined interval along the lower left rib 155 and faces the lower left rib 155 is the lower left rib 155. It is formed so as to protrude inward in the same manner as above. Similarly, the lower right rib 305 and the lower right adjacent rib 306 (not shown) are formed in the right housing 16. The front surface of the left upright portion of the base holder 112 (the left inclined portion 125 of the front portion 116) is adjacent to the rear surface of the lower left rib 155, and similarly, the right side of the front portion 116 is attached to the rear surface of the lower right rib 305. The inclined portions 125 of the above are adjacent to each other (reliable rib).
A left bearing case holding rib 157 protruding inward (to the right) from the inner surface of the left housing 15 for holding the bearing case 40 is formed in front of the front surface portion 154 of the left motor case portion 150, and is right. Similarly, the housing 16 is formed with a right bearing case holding rib 307 (not shown), and a bearing case holding portion is formed by these.
The front portion 154 of the left motor case portion 150, the left bearing case holding rib 157, and the space between them are formed so as to be recessed toward the outside (left) in the left-right direction, and extend downward from the portion where the centrifugal fan 41 is arranged. It is the upper part of the left groove portion 158. The lower portion of the left groove portion 158 is formed by the lower left rib 155, the lower left adjacent rib 156, and the inner wall of the left housing 15 between them, and extends forward. Similarly, the right groove portion 308 is formed in the right housing 16.

Further, a guide member is provided in the lower part of the left groove portion 158 and the right groove portion 308 so as to be continuous with the upper part of the left groove portion 158 to the right groove portion 308 from the lower front side to the front of the lower surface portions 152 and 152R of the motor case portion. 110 is arranged.
The guide member 110 is inclined so as to surround the inclined surface portion 160 that protrudes forward as it goes downward, the front view inverted T-shaped partition portion 162 that protrudes forward from the lower center of the inclined surface portion 160, and the rear surface of the inclined surface portion 160. An intake guide portion 164 that protrudes rearward from the upper side, the left side, and the right side of the surface portion 160, and a dust collection intake port 166 that opens so as to penetrate in the front-rear direction on the lower side of the partition portion 162 and the intake guide portion 164, and dust collection. An intake port guide portion 168 that is inclined in the same manner as the inclined surface portion 160 is provided below the intake port 166.
The roller holder 82 is located on the front side of the inclined surface portion 160 and the intake port guide portion 168, and the partition portion 162 is inserted between the hold portions 87 and 87.
The upper rear portion of the intake guide portion 164 is in contact with the lower front portion of the motor case portion, and the left and right inclined rear sides of the intake guide portion 164 are the inclined portion 125 of the base holder 112 and the front rib 132 of the holder case portion. It faces the same direction as the inclined portion 135.

When the centrifugal fan 41 rotates due to the rotation of the motor shaft 35, the extruded air is between the left groove portion 158 and the right groove portion 308 (between the bearing case 40 and the lower part of the push plate 80 and the front portion 154 and 154R of the motor case portion). ), It flows downward and is exhausted through the upper side of the intake guide portion 164 of the guide member 110, the upper side (front side) of the inclined surface portion 160 , or the upper side of the partition portion 162 (blower). The exhaust air is exhausted forward in a state of being branched to the left and right by the partition portion 162 having an inverted T-shaped cross section.
The exhaust passage Z is formed by the left groove portion 158, the right groove portion 308, and the guide member 110. Further, the portion surrounded by the partition portion 162, the hold portions 87, 87, and the arm piece 88 is an exhaust port 169 which is partially (lower) divided into left and right and opens forward.

A rear lower opening 170 is formed between the rear portion of the lower surface portion 152 of the left motor case portion 150 and the upper surface of the rear rib 134 of the left holder case portion 130 (or the similarly formed portion of the right housing 16) in the housing 2. The tip of the dust suction adapter 172 can be inserted forward from the rear lower opening 170.
The dust suction adapter 172 is connected to a hose of a dust collector (not shown) and sucks air.
The dust absorption adapter 172 is formed in a half-split cylinder shape, and has a left dust absorption adapter portion 173 and a right dust absorption adapter portion 174.
The dust suction adapter 172 passes through the U-shaped base holder 112 when viewed from the front and comes into contact with the base holder 112, and the tip reaches the rear side of the intake guide portion 164 of the guide member 110. The dust suction adapter 172 and the dust collection intake port 166 of the guide member 110 communicate with each other by the rear surface of the inclined surface portion 160, the partition portion 162, or the intake port guide portion 168 so that the dust collection air can flow. The portion from the tip of the dust collecting adapter 172 to the dust collecting intake port 166 forms an intake passage Y, and the intake passage Y is connected to the hose of the dust collector via the dust collecting adapter 172.
The dust suction adapter 172 is arranged below the battery 21 attached to the battery mounting portion 20, and can be removed by pulling it out from the rear lower opening 170.
The dust suction adapter 172 has a bent portion 178 that connects the front portion 176 and the rear portion 177 so that the rear portion 177 is downward with respect to the front portion 176.

An operation example of such a jigsaw 1 will be described.
The operator sets the blade 6 on the stopped slider 8 so that the saw teeth are in front, and the front portion of the lower surface of the base 14 is applied to the work material. Then, when the handle portion 18 (handle Q) is gripped and the switch 26 is turned on by the operation of the trigger 27 with the battery 21 attached to the battery mounting portion 20, the controller 25 causes the speed adjustment dial 30 to move. Power is supplied to the motor 32 according to the state, the motor shaft 35 rotates at a speed corresponding to the state of the speed adjustment dial 30, and the intermediate gear 50 is rotated by the rotating motor shaft 35. However, when the lock-on switch 28 is on, the controller 25 supplies power to the motor 32 even if the trigger 27 is not operated and the switch 26 is off. Further, when the standby switch 29 is on, the controller 25 does not supply power to the motor 32 even if the trigger 27 is operated and the switch 26 is turned on or the lock-on switch 28 is turned on.
The rotation of the intermediate gear 50 causes the slider 8 to move up and down via the guide roller 54. Further, the counterweight 12 (balance plate 100) moves up and down due to the rotation of the counterweight cam portion 61 of the intermediate gear 50. Further, when the push plate 80 moves up and down due to the rotation of the push plate cam portion 62 of the intermediate gear 50 and the switching lever 84 is switched to the swing allowable position, the back roller 86 swings via the roller holder 82. To do. These vertical movements and swings are performed the same number of times (once for each rotation of the intermediate gear 50).
The swinging back roller 86 pushes the blade 6 forward as the blade 6 rises, and does not push the blade 6 when the blade 6 descends, causing the blade 6 to orbitally move.

Further, the slider 8 moves up and down in a state where vibration is suppressed by a counterweight 12 (balance plate 100) that moves up and down symmetrically.
When the handle Q is pushed forward by the operator while the slider 8 or the blade 6 is operating, the saw blade on the front side of the blade 6 that moves up and down hits the work material, and the work material is cut with the front-back direction as the cutting direction. I will go. If the blade 6 is pushed by the back roller 86 to cut the material to be processed while the orbital movement is performed, the blade 6 is moved upward and pushed forward. Therefore, the cutting force is larger (pushing operation) than when the blade 6 is not moved orbital. Is lighter). When cutting the work material, the blade 6 receives a backward force (cutting resistance) from the work material.

Further, once the bolt 147 is loosened, the housing 2 is in an arbitrary tilting posture with respect to the base 14, and when the bolt 147 is subsequently tightened, the housing 2 is tilted by the base holder 112 and the clamp plate 146. It is fixed with.
The base holder 112 is provided with a bolt hole 126 in the front portion 116 and extends rearward from the bolt hole 126.

In addition, the centrifugal fan 41 is rotated by the rotation of the motor shaft 35, and the air is separated into left and right by the partition portion 162 of the guide member 110 through the exhaust passage Z, and the blade 6 near the base 14 from the exhaust port 169. It is discharged to the left and right (left and right of the processed part).
When the dust collector is operated with the dust suction adapter 172 connected to the dust collector inserted from the rear lower opening 170 of the housing 2, the area around the dust collection intake port 166 of the guide member 110 (behind the processed portion) Air is sucked into the dust suction adapter 172 (intake passage Y) from the intake port guide portion 168, the rear surface of the inclined surface portion 160, or the intake guide portion 164.
When the switch 26 is turned off or the standby switch 29 is turned on by the operation of the trigger 27, the power supply to the motor 32 is stopped by the controller 25, the motor shaft 35 is stopped, and various vertical movements and swings are made. Or the exhaust stops.

The jigsaw 1 described above has a left housing 15 and a right housing 16, a housing 2 in which a motor 32 and a slider 8 are arranged inside, a centrifugal fan 41 arranged inside the housing 2, and a left housing 15. The left groove portion 158 and the right groove portion 308 formed so as to be recessed outward in the left-right direction on at least one inner surface of the right housing 16 extending from the lower side to the front side of the centrifugal fan 41, and the housing 2. A guide member 110 is provided inside so as to be continuous with the left groove portion 158 and the right groove portion 308, and the exhaust passage Z is formed by the left groove portion 158, the right groove portion 308, and the guide member 110, and is directed toward the front. The exhaust port 169 opens. Therefore, the exhaust passage Z (blower) is simply formed by the left groove portion 158, the right groove portion 308, and the guide member 110 of the housing 2.
Further, the guide member 110 has a partition portion 162 that branches the exhaust passage Z to the left and right. Therefore, due to the simple structure, exhaust air is generated toward both the left and right sides of the blade 6, the efficiency of air blowing is improved, and chips generated when the work material is cut are efficiently blown off.
Further, the guide member 110 has a dust collecting intake port 166 penetrating in the front-rear direction. Therefore, the intake passage Y for collecting dust is simply configured (along with the exhaust passage Z).
In addition, a controller 25 for controlling the motor 32 is provided, and a cooling intake port 42b for cooling the motor 32 is arranged in a portion of the housing 2 on the side of the battery mounting portion 20, and the controller. Reference numeral 25 denotes a posture along a virtual straight line X passing through the centrifugal fan 41 and the cooling intake port 42b. Therefore, the cooling air passes along the controller 25 to efficiently cool the controller 25, and the cooling air is rectified in the direction of the virtual straight line X by the controller 25 to efficiently cool the motor 32 and the like. ..
A battery 21 for driving the motor 32 is arranged behind the motor 32, and a dust suction adapter 172 connected to the hose of the dust collector is detachably arranged below the battery 21. Therefore, the battery 21, the dust suction adapter 172, and the hose are arranged so as not to interfere with each other.
Further, the dust suction adapter 172 has a bent portion 178 that connects the front portion 176 and the rear portion 177 so that the rear portion 177 is downward with respect to the front portion 176. Therefore, the dust suction adapter 172 and the hose of the dust collector do not interfere with each other even when a large battery is attached.
Furthermore, a base 14 connected to the housing 2 below the housing 2 by a conductive base holder 112 arranged inside the housing 2 is provided, and the dust absorbing adapter 172 is attached to the base holder 112 in the mounted state. Contact with. Therefore, even if static electricity is generated in the dust absorbing adapter 172, it is dissipated by the base holder 112, and the accumulation of static electricity in the dust absorbing adapter 172 and the like is prevented.

In addition, the jigsaw 1 includes a main body P having a resin housing 2 and a motor 32 and a slider 8 arranged inside the housing 2, a base 14 for supporting the main body P so as to be tiltable to the left and right, and a main body P. It is provided with a base holder 112 that presses toward the base 14, and a bolt 147 that penetrates the base 14, the main body P, and the base holder 112 and fixes the main body P to the base 14 by axial tension. The base holder 112 has a pressing surface extending in the front-rear direction. Therefore, the base holder 112 firmly fixes the base 14 to the main body P, and suppresses vibrations in the base 14 and the main body P.
Further, the base holder 112 extends to the rear of the bolt 147. Therefore, the vibration generated by the reciprocating rotary motion with the rear of the slider 8 as the fulcrum in the power transmission unit 4 is effectively suppressed by holding it as far back as possible.
Further, the length of the base holder 112 on the pressing surface in the front-rear direction is more than half the length of the contact surface between the main body P and the base 14 in the front-rear direction. Therefore, the length of the pressing surface of the base holder 112 is increased, the base 14 is more firmly fixed to the main body P, and the vibration in the base 14 and the main body P is further suppressed.
Furthermore, the base holder 112 has an upright portion that stands up in the vertical direction and extends in the front-back direction. Therefore, the rigidity of the base holder 112 itself is increased, and the base 14 is firmly fixed by that amount.
In addition, the front end of the base holder 112 is adjacent to the lower left rib 155 and lower right rib 305 formed in the housing 2. Therefore, the base holder 112 is held at an appropriate position in the housing 2 and the housing 2 is prevented from being deformed.
Further, the base holder 112 is a metal plate having a bent portion. Therefore, the highly rigid base holder 112 is simply formed.
Further, the base holder 112 is U-shaped when viewed from the front. Therefore, the rigidity of the base holder 112 itself is increased, and the base 14 is firmly fixed by that amount.
Furthermore, the base holder 112 has a fastener overlap portion through which the bolt 147 penetrates so as to overlap in a side view. Therefore, the base holder 112 does not interfere with the bolt 147 and is efficiently arranged so as to surround the bolt 147.
In addition, a front small piece portion 122 is formed at the front end portion of the base holder 112, and a rear small piece portion 124 is formed at the rear end portion, and a front small piece receiving portion (front rib) for receiving the front small piece portion 122 is formed in the housing 2. 132) is formed and a rear small piece receiving portion (rear rib 134) is formed. Therefore, the base holder 112 is held in an appropriate position in the housing 2.
Further, the front small piece receiving portion is arranged above and below the front small piece portion 122, and the rear small piece receiving portion is arranged above and below the rear small piece portion 124. Therefore, the movement of the base holder 112 can be restricted in the vertical direction, which is the thickness direction of the front small piece portion 122 and the rear small piece portion 124, and the thickness of the front small piece portion 122 and the rear small piece portion 124, that is, the thickness of the base holder 112 Since the thickness of the plate material makes it easy to stabilize the dimensions, the front small piece portion 122, the rear small piece portion 124, the front small piece receiving portion, and the rear small piece receiving portion are easily formed.

Further, the jig saw 1 has a main body P having a motor 32 and a slider 8 arranged inside the housing 2, a handle Q which is an upper part of the main body P and is arranged above the motor 32, and a battery side mounting. A battery 21 having a surface N and supplying power to the motor 32, and a battery mounting portion 20 provided on the main body P and having a mounting surface M on the battery mounting portion side are provided. By sliding in the direction along the battery mounting portion side mounting surface M, the battery 21 can be mounted on the battery mounting portion 20 with the battery mounting portion side mounting surface M and the battery side mounting surface N facing each other. The battery mounting portion 20 is mounted so that the battery side mounting surface N is on the upper side. Therefore, in the top handle type jigsaw 1 in which the independent handle Q is provided on the upper part of the motor 32, the front-rear length may not change even if a battery 21 or the like having various capacities is attached or the battery 21 is removed. It can be made easy to handle.
Further, the battery 21 overlaps with the motor 32 when viewed from the front in a state of being attached to the battery mounting portion 20. Therefore, even if the mounting surface M on the battery mounting portion side faces downward, the battery 21 is relatively high in the vertical direction, a sufficient mounting space for the battery 21 is secured, and the large capacity battery 21 is mounted. Also becomes compact, and vibration is suppressed as the battery 21 approaches the motor 32 .
Further, the battery 21 overlaps with the handle Q in a top view in a state of being attached to the battery mounting portion 20. Therefore, the jigsaw 1 becomes more compact in the front-rear direction as compared with the case where it does not overlap.
Further, a plate-shaped controller 25 for controlling the motor 32 is provided, and the controller 25 is arranged above the battery 21 in a posture along the battery side mounting surface N of the battery 21 mounted on the battery mounting portion 20. ing. Therefore, the jigsaw 1 is compact in the vertical direction, and the peripheral portion of the battery mounting portion 20 is particularly compact even when the large-capacity battery 21 is mounted.
In addition, the controller 25 overlaps the handle Q in top view. Therefore, the jigsaw 1 becomes compact in the front-rear direction.

[Second form]
14 to 25 are correspondence views of FIGS. 1 to 12 of the jigsaw 201 according to the second embodiment of the present invention.
The jigsaw 201 according to the second form is the same as the jigsaw 1 of the first form except for the handle and various switches, and the same reference numerals are given to the members and parts which are similarly the same.

The jigsaw 201 does not have an independent handle in the main body P, and the upper surface of the housing 202 that houses the power unit 3 is a body handle QB (body handle type).
The housing 202 has a left housing 215 and a right housing 216. The left housing 215 is opened with a cooling intake port 42c similar to the cooling intake port 42a of the first form, and the right housing 216 is also opened with a plurality of cooling intake ports 42d. Further, a plurality of cooling intake ports 42e having a slit shape in the front-rear direction and arranged in the front-rear direction are opened on the side of the battery mounting portion 20 in the right housing 216 (FIG. 24).
The jigsaw 201 does not include the switch 26 or the trigger 27 of the first embodiment, but instead includes a switch 228 having an on button 226 and a standby button 227. The on button 226 and the standby button 227 are exposed from the left side of the housing 202. The controller 25 electrically connected to the switch 228 enters the standby state when the standby button 227 is pressed, and supplies electric power to the motor 32 when the on button 226 is pressed.

The jigsaw 201 of the second form has the same structure of the lower part of the housing 202 as that of the first form, the power unit 3, the power transmission unit 4, the slider 8, the orbital motion mechanism 10, the counterweight 12, and the base 14. It has the same effect as the morphology.
In particular, the jigsaw 201 has a left housing 215 and a right housing 216, the housing 202 in which the motor 32 and the slider 8 are arranged inside, the centrifugal fan 41 arranged inside the housing 202, and the left housing 215. On the inner surface of at least one of the right housing 216 and the portion extending from the lower side to the front side of the centrifugal fan 41, the left groove portion 158 and the right groove portion 308 formed so as to be recessed outward in the left-right direction, and the housing 202. A guide member 110 is provided inside so as to be continuous with the left groove portion 158 and the right groove portion 308, and an exhaust passage Z is formed by the left groove portion 158, the right groove portion 308, and the guide member 110, and is directed toward the front. The exhaust port 169 opens. Therefore, the exhaust passage Z (blower) is simply formed by the left groove portion 158, the right groove portion 308, and the guide member 110 of the housing 202.
Further, the jigsaw 201 is based on a main body P having a resin housing 202, a motor 32 and a slider 8 arranged inside the housing 202, a base 14 for supporting the main body P so as to be tiltable to the left and right, and a main body P. It is provided with a base holder 112 that presses toward 14, and a bolt 147 that penetrates the base 14, the main body P, and the base holder 112 and fixes the main body P to the base 14 by axial tension. , The base holder 112 has a pressing surface extending in the front-rear direction. Therefore, the base holder 112 firmly fixes the base 14 to the main body P, and suppresses vibrations in the base 14 and the main body P.
Further, a controller 25 for controlling the motor 32 is provided, and a cooling intake port 42e for cooling the motor 32 is arranged in a portion of the housing 202 on the side of the battery mounting portion 20, and the controller 25 is provided. Is arranged along a virtual straight line X passing through the centrifugal fan 41 and the cooling intake port 42e. Therefore, the cooling air passes along the controller 25 to efficiently cool the controller 25, and the cooling air is rectified in the direction of the virtual straight line X by the controller 25 to efficiently cool the motor 32 and the like. ..

[Change example]
The present invention is not limited to the above embodiment, and for example, the following changes may be appropriately made.
A rod may be provided in place of or connected to the slider so that the rod is fitted with a blade. In this case, the drive unit is a rod. The rod may have a support shaft in the left-right direction at the upper part for orbital movement. The slider or rod can be cylindrical, elliptical, square, hexagonal, or the like.
The various cams in the intermediate gear may be separate from each other, may be supported by different axes, may be driven by separate drive sources, and the phase may be set to a phase other than 0 ° or 180 °. You may.
The blade may have a blade other than the saw blade.
The exhaust port may be completely separated into the left and right by making the partition portion of the guide member partition the entire vertical direction of the exhaust port. Further, a part or all of the intake port may be divided into left and right by arranging a partition portion in or around the intake port.
The shape and material of the left and right housings can be changed, such as the bathtub-shaped right housing covered with the lid-shaped left housing, or part or all of it made of metal or elastic. .. The shape, material, etc. of other members and parts can be changed.
The bolt (fastener) related to the base holder (fastening member) may be a pin, a latch, a clamp, a clip, or a combination thereof.

The battery may be a non-rechargeable primary battery.
Instead of power supply by the battery, power supply from a commercial power source by a power cord may be used.
The connection mode of the motor and the lead wire can be changed in various ways. The number and arrangement of various members such as the number of coils and magnets of the motor can be increased or decreased or set in different places as appropriate. The arrangement of the various elements may be changed in various ways, such as providing a switching element on the sensor substrate. The motor may be a brushed motor.
The various switches may be omitted as appropriate, may be in a different form, or may be provided with a new switch.
The present invention may be applied to a reciprocating saw, a cutter, or the like instead of the jigsaw.

1,201 ... Jigsaw, 2,202 ... Housing, 6 ... Blade, 8 ... Slider, 14 ... Base, 15,215 ... Left housing, 16,216 ... Right housing, 20 ... Battery mounting Parts, 21 ... Battery, 25 ... Controller, 32 ... Motor, 41 ... Centrifugal fan, 42b, 42e ... Cooling intake port, 110 ... Guide member, 112 ... Base holder (fastening member), 116・ ・ (Base holder) front part (standing part, fastener overlap part), 118 ・ ・ (base holder) rear part (standing part, fastener overlapping part), 118 ・ ・ (base holder) connecting part (Standing part, fastener overlap part), 122 ... front small piece part (small piece part), 124 ... rear small piece part (small piece part), 132 ... front rib (front small piece receiving part), 134 ... rear rib (Rear small piece receiving part), 147 ... Bolt (fastener), 155 ... Lower left rib (reliable rib, exhaust passage), 158 ... Left groove part (groove part), 162 ... Partition part, 166 ... For dust collection Intake port, 169 ... Exhaust port, 172 ... Dust absorption adapter, 176 ... Front part (of dust absorption adapter), 177 ... Rear part (of dust absorption adapter), 178 ... Bending part (of dust absorption adapter), 308 ... Right groove (groove), M ... Battery mounting side mounting surface, N ... Battery side mounting surface, P ... (Jigsaw) body, Q ... Handle, X ... Virtual straight line, Y ... Intake passage , Z ... Exhaust passage.

Claims (10)

A jigsaw main body having a resin housing and a motor and a drive unit arranged inside the housing,
A base that supports the jigsaw body so that it can tilt left and right,
A fastening member that presses the jigsaw main body toward the base, and
A fastener that penetrates the base, the jigsaw main body, and the fastening member, and fixes the jigsaw main body to the base by axial tension.
Is equipped with
The fastening member has a pressing surface extending in the front-rear direction, and also has an upright portion that stands up in the vertical direction and extends in the front-back direction.
The upright portion is in contact with the inner surface of the housing.
The housing has a left housing and a right housing.
A jigsaw characterized in that a screw in the left-right direction for fixing the left housing and the right housing to each other is arranged between the front portion and the rear portion of the upright portion . A jigsaw main body having a resin housing and a motor and a drive unit arranged inside the housing,
A base that supports the jigsaw body so that it can tilt left and right,
A fastening member that presses the jigsaw main body toward the base, and
A fastener that penetrates the base, the jigsaw main body, and the fastening member, and fixes the jigsaw main body to the base by axial tension.
Is equipped with
The fastening member has a pressing surface extending in the front-rear direction, and also has an upright portion that stands up in the vertical direction and extends in the front-back direction.
The front end of the upright portion is adjacent to a pad rib formed on the housing.
A jigsaw characterized by that. A jigsaw main body having a resin housing and a motor and a drive unit arranged inside the housing,
A base that supports the jigsaw body so that it can tilt left and right,
A fastening member that presses the jigsaw main body toward the base, and
A fastener that penetrates the base, the jigsaw main body, and the fastening member, and fixes the jigsaw main body to the base by axial tension.
Is equipped with
The fastening member has a pressing surface extending in the front-rear direction, and also has an upright portion that stands up in the vertical direction and extends in the front-back direction.
The front end of the fastening member is adjacent to a pad rib formed on the housing.
The pad rib is a part of the exhaust passage.
A jigsaw characterized by that. The jigsaw according to any one of claims 1 to 3 , wherein the fastening member extends to the rear of the fastener. Any of claims 1 or 4 , wherein the length of the fastening member in the front-rear direction on the pressing surface is at least half the length in the front-rear direction of the contact surface between the jigsaw main body and the base. Jigsaw according to any. The jigsaw according to any one of claims 1 to 5, wherein the fastening member is a metal plate having a bent portion. The jigsaw according to any one of claims 1 to 6, wherein the fastening member is U-shaped when viewed from the front. The jigsaw according to any one of claims 1 to 7, wherein the fastening member has a fastener overlapping portion that penetrates the fastener so as to overlap in a side view. Small pieces are formed on at least one of the front end and the rear end of the fastening member.
The jigsaw according to any one of claims 1 to 8, wherein a small piece receiving portion for receiving the small piece portion is formed in the housing. The jigsaw according to claim 9, wherein the small piece receiving portion is arranged above and below the small piece portion.

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