Auxiliary base and wire saw

Abstract

The invention provides an auxiliary base. The auxiliary base (1, 201) can be mounted on a wire saw (J), the wire saw (J) is provided with a base part (6) capable of being in contact with a workpiece (W) and a main body part (2) capable of tilting in the left-right direction relative to the base part (6), the auxiliary base (1, 201) is provided with contactable parts (115, 116), and the contactable parts (115, 116) are parts capable of being in contact with the workpiece (W) when the auxiliary base (1, 201) is mounted on the wire saw (J). The contactable portions (115, 116) are attached in a state in which the auxiliary width (WA) is larger than the width (WB) of the base portion (6) in the left-right direction, the auxiliary width (WA) being the distance from the contactable portions (115, 116) to the center of the base portion (6) in the left-right direction of the main body portion (2). Therefore, the stability of the fret saw during workpiece cutting can be further improved according to needs.

Description

Technical Field

[0001] The present invention relates to a jigsaw for cutting a workpiece with a saw blade and auxiliary bases thereof. Background Art

[0002] A wire saw disclosed in Japanese Patent Application Laid-Open No. 2013-144334 (Patent Document 1) is known. The wire saw has a main body and a front two-pronged base, and the front two-pronged base is connected to the lower part of the main body. The base has an auxiliary base in the middle part (center part) of the two-pronged part. The auxiliary base can be moved in and out in a plane parallel to the lower surface of the base between a storage position stored in the base and a pull-out position protruding from the storage part to the outside of the base. Summary of the invention

[0003] Since the auxiliary base in the prior art is accommodated in the accommodating portion of the base, its size is limited. Therefore, the wire saw in the prior art has limitations in improving the stability during cutting.

[0004] The first aspect of the present invention is an auxiliary base that can be installed on a wire saw, the wire saw having a base portion that can contact a workpiece and a main body portion that can tilt in the left and right directions relative to the base portion, the auxiliary base having a contactable portion, the contactable portion being a portion that can contact the workpiece when installed, and the contactable portion is installed in a state where an auxiliary width is greater than a width of the base portion in the left and right directions, wherein the auxiliary width refers to the distance from the contactable portion to the center (center) of the base portion in the left and right directions of the main body.

[0005] A second aspect of the present invention is an auxiliary base that can be installed on a wire saw, the wire saw having a base portion that can contact a workpiece and a main body portion that can tilt in the left and right directions relative to the base portion, the auxiliary base having a contactable portion, the contactable portion being a portion that can contact the workpiece when installed, and in the left and right directions of the main body portion, the contactable portion is arranged on a side of the wire saw that is inclined closer to the main body portion when the center of gravity of the wire saw is inclined at an angle of 45° than the main body portion, i.e., on the inclined side of the main body portion.

[0006] A third aspect of the present invention is a jigsaw including the auxiliary base.

[0007] According to the auxiliary base of the present invention, the stability of the wire saw during cutting can be further improved as required. According to the wire saw of the present invention, the stability during cutting can be further improved as required. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The diagram is a perspective view of the front, top, and left sides of the jigsaw according to the first embodiment, with the main body and the handle tilted to the right. Figure 2 This is a front view of the wire saw according to the first embodiment. Figure 3 It is a front view of the main body and the handle of the jigsaw according to the first embodiment in a state where they are erected. Figure 4 This is an enlarged view of the auxiliary base and its surroundings of the wire saw according to the first embodiment. Figure 5 This is a central cross-sectional view of an auxiliary base of the jigsaw according to the first embodiment. Figure 6 It is a perspective view of the front surface, the bottom surface, and the left surface side of the jigsaw of the first embodiment. Figure 7 It is an exploded perspective view of the front surface, bottom surface, and left surface side of the base portion and the auxiliary base of the jigsaw according to the first embodiment. Figure 8 It is a central cross-sectional view of the auxiliary base with the cover plate installed. Fig. 9 This is an enlarged view of the auxiliary base and its surroundings when the main body and the handle are tilted to the left. Fig. 10A It is a perspective view of the auxiliary base of the jigsaw of the second embodiment. Fig. 10B The auxiliary base of the second method is Fig. 10A A perspective view of the opposite side. [Explanation of Reference Numerals] 1, 201: auxiliary base; 2: main body; 6: base; 8: battery; 18: battery mounting portion; 34: saw blade; 74: scale mounting portion; 100, 210: head; 102, 212: leg; 115: first convex portion (contactable portion); 116: second convex portion (contactable portion); 227: first concave-convex portion; 228: second concave-convex portion; G: center of gravity; J: wire saw; W: workpiece; WA: auxiliary width; WB: width. DETAILED DESCRIPTION

[0009] Hereinafter, the embodiment of the present invention will be described with reference to the accompanying drawings as appropriate. The following description includes modified examples of the embodiment. The present invention is not limited to the embodiment and the modified examples. The front and rear, up and down, and left and right in the embodiment and the modified examples are defined for convenience of description and may be changed depending on at least one of the working situation and the movement of components.

[0010] Figure 1The diagram is a perspective view of the front, top, and left surfaces of the jigsaw J according to the first embodiment, with the main body 2 and the handle 4 tilted to the right. Figure 2 It is a front view of the wire saw J. Figure 3 It is a front view of the main body 2 and the handle 4 of the jigsaw J in an upright state. Figure 4 It is an enlarged view of the auxiliary base 1 and its surroundings. Figure 5 It is a central cross-sectional view of the auxiliary base 1. Figure 6 It is a perspective view of the front surface, the lower surface, and the left surface side of the jigsaw J.

[0011] The jigsaw J has an auxiliary base 1, a main body 2, a handle 4, a base 6 and a rechargeable battery 8. The jigsaw J is a rechargeable jigsaw driven by the battery 8. The battery 8 is a battery for electric tools. In addition, at least one of the handle 4 and the battery 8 can also be regarded as a structural element of the main body 2. At least one of the auxiliary base 1 and the battery 8 can also be a structural element independent of the jigsaw J. The battery 8 can also be a primary battery. The battery 8 can also be a battery other than a battery for electric tools, for example, it can be a general-purpose battery. Instead of the battery 8, a power cord connected to a power source can also be used. A jigsaw having a power cord connected to an AC power source is an AC-type jigsaw.

[0012] exist Figure 1 , Figure 2 , Figure 4 and Figure 6 In FIG. 1 , the main body 2 and the handle 4 are depicted in a posture in which the main body 2 and the handle 4 are tilted 45° to the right from the vertical direction relative to the base 6. The jigsaw J has a function of adjusting the posture of the main body 2 and the handle 4 relative to the base 6. Figure 3 In FIG. 1 , the main body 2 and the handle 4 are depicted in a vertical posture, in other words, in an upright state.

[0013] exist Figure 2 In the embodiment, up, down, left, and right are basically defined according to the direction viewed by the user of the jigsaw J. However, for the sake of illustration, Figure 2 In FIG. 1 , the direction from the upper left to the lower right is the vertical direction of the main body 2 and the handle 4. Figure 2 In the figure, the direction from the upper right to the lower left is the left-right direction of the main body 2 and the handle 4. That is, for the sake of convenience, the direction of the main body 2 and the handle 4 is not Figure 1 , Figure 2 , Figure 4 and Figure 6 , but with Figure 3 The same direction as shown in the state where the base portion 6 is vertically erected relative to the horizontal state will be described below.

[0014] When viewed from the left side to the right side, the main body 2 is L-shaped as a whole. The main body 2 has a main body front portion 2F at the front. The main body front portion 2F extends up and down. The main body 2 has a main body rear portion 2B at the rear. The main body rear portion 2B extends rearward from the lower rear side of the main body front portion 2F.

[0015] The main body 2 has a shell 10, a motor 12, a fan 14, a battery mounting portion 18, a controller 20, a speed adjustment switch 22, a main power switch 26, a power transmission portion 28, a slide (output portion) 30, a top tool mounting portion 32, a saw blade (top tool) 34, a track motion portion 36, a track switching portion 37, a counterweight portion 38 and a protective portion 39. In the main body 2, a battery mounting portion 18, a controller 20, a motor 12, a fan 14, a power transmission portion 28, a track motion portion 36, a counterweight portion 38, a slide 30, a top tool mounting portion 32 and a protective member 39 are arranged in order from the rear.

[0016] In addition, the configuration of various components and parts can be changed in various ways. The saw blade 34 may not be a structural element of the main body 2 or the jigsaw J, but may be a structural element independent of the main body 2 or the jigsaw J. The slider 30 may be a structural element of the power transmission part 28, and the top tool mounting part 32 may be regarded as an output part. The slider 30 and the top tool mounting part 32 may also be regarded as an output part together.

[0017] The housing 10 forms the outer contour of the main body 2 and the handle 4. The housing 10 directly or indirectly holds various components. The housing 10 is a split component divided into a left part and a right part. In addition, the housing 10 can be modified in various ways. For example, in the housing 10, the outer contour of the main body 2 and the outer contour of the handle 4 can also be separate structures that can be combined with each other. In the split housing 10, at least one of the size and shape of the left and right parts can be greatly different. It is also possible to change at least one of the materials of various parts in the housing 10 and the number and arrangement of the openings.

[0018] The handle portion 4 includes a main switch portion 40 and a lock switch (Lock on switch) 42. In addition, at least one of the main switch portion 40 and the lock on switch 42 may be disposed on the main body portion 2.

[0019] The main switch unit 40 includes a main switch 46 and a trigger 48. The main switch 46 is electrically connected to the controller 20. The trigger 48 is fixed to a plunger of the main switch 46. The lower portion of the trigger 48 is exposed downward from the handle opening of the housing 10. The trigger 48 can slide up and down and can be operated upward by the user.

[0020] When the trigger 48 is at the lowest position, the main switch 46 is turned off. When the trigger 48 is slid upward from the lowest position, the main switch 46 is turned on after a predetermined clearance. When the main switch 46 is further operated upward from the on state, the state of the signal to be emitted is changed according to the amount of upward operation, thereby changing the rotation speed of the motor 12. In addition, the main switch 46 may not change the state of the signal to be issued according to the amount of upward operation. In addition, the play may be omitted, and the main switch 46 may be turned on immediately when the trigger 48 starts to be operated upward.

[0021] The lock switch 42 is a push button switch that is switched by a pressing operation of the user. The lock switch 42 is electrically connected to the controller 20 . In addition, the form of at least one of the main switch 46 and the lock switch 42 can be changed in various ways. For example, the lock switch 42 can also be a toggle switch instead of a button. The forms of other switches can also be changed in various ways.

[0022] The electric motor 12 is a brushless motor and a DC motor. The electric motor 12 is held by a housing 10. The housing 10 is used to hold the electric motor 12 and can be understood as a motor housing. The electric motor 12 has a motor shaft 50 extending in the front-rear direction. The motor shaft 50 rotates around its own imaginary central axis. A pinion gear portion 52 is formed at a front end portion of the motor shaft 50 .

[0023] The fan 14 is fixed integrally with the motor shaft 50. The fan 14 is a centrifugal fan. In addition, as the fan 14, other fans such as an axial flow fan may be used. The rear portion of the lower opening of the casing 10 is arranged radially outside the fan 14 .

[0024] The battery mounting portion 18 is disposed at the rear lower end of the main body 2. The battery 8 is mounted on the battery mounting portion 18. The battery mounting portion 18 has a main body side terminal connected to the terminal of the battery 8. The main body side terminal is disposed in the rear lower opening of the housing 10.

[0025] The battery 8 is mounted on the lower side of the battery mounting portion 18 by sliding forward from the rear side of the battery mounting portion 18. The sliding mounting direction of the battery 8 may be other than the direction from the rear side to the front side. The battery 8 may also be mounted in a manner other than sliding mounting.

[0026] The battery 8 is a 18V lithium-ion battery. The battery 8 contains eight cells (not shown) in a plastic battery case. The cells are cylindrical and elongated in the axial direction, and extend left and right when the battery 8 is installed. The battery 8 maintains the electric power for driving the motor 12. In addition, any lithium ion battery of 10.8V, 14.4V, 25.2V, 28V, 36V, etc. may be used as the battery 8. A lithium ion battery having a voltage less than 10.8V or exceeding 36V may be used as the battery 8. Other types of batteries may be used as the battery 8. A plurality of batteries 8 may be used.

[0027] The controller 20 is held inside the battery mounting portion 18. The controller 20 controls the motor 12. The controller 20 is electrically connected to the motor 12. The main body side terminal of the battery mounting portion 18 is electrically connected to the controller 20. The controller 20 is electrically connected to a speed adjustment switch 22 and a main power switch 26 .

[0028] The speed adjustment switch 22 is a switch in the form of a dial. The speed adjustment switch 22 has a disk portion extending forward, backward, left and right. The disk portion of the speed adjustment switch 22 can rotate around an imaginary central axis extending up and down. The left portion of the disk portion of the speed adjustment switch 22 is exposed from a hole formed on the left surface of the housing 10. The user rotates the operation disk portion by moving the left portion of the disk portion forward or backward. The speed adjustment switch 22 outputs a signal corresponding to the rotation amount of the disk portion. The output signal is sent to the controller 20. In addition, the speed adjustment switch 22 may be omitted.

[0029] The main power switch 26 is a tact switch and is held at the upper front portion of the housing 10 . The main power switch 26 alternately sends an on signal or an off signal to the controller 20 every time it is pressed by the user.

[0030] The power transmission part 28 transmits the power of the motor 12 to the saw blade 34 via the slider 30 and the top tool mounting part 32. The slider 30 is cylindrical. The slider 30 extends in the up-down direction. The top tool mounting part 32 is held at the lower end of the slider 30. The slider 30 can reciprocate in the up-down direction. The top tool mounting part 32 can reciprocate in the up-down direction.

[0031] The slider 30 extends in the up-down direction and can move in the up-down direction. The lower portion of the slider 30 can swing forward and backward relative to the upper end portion of the slider 30 .

[0032] The tip tool mounting portion 32 is held by the slider 30 . The tip tool mounting portion 32 is connected to the lower end portion of the slider 30 . The saw blade 34 extends in the up-down direction. The saw blade 34 has a workpiece acting portion on one side in the length direction that acts on the workpiece W. The workpiece acting portion is, for example, a saw blade that cuts the workpiece W. The upper end of the saw blade 34 is mounted on the top tool mounting portion 32 with the workpiece acting portion facing forward. The saw blade 34 is mounted on the top tool mounting portion 32 in a tool-free manner without using a tool such as a wrench.

[0033] The orbital motion part 36 contacts the rear edge of the saw blade 34. The orbital motion part 36 is swingable. When swinging, the orbital motion part 36 applies a force in the front-back direction to the saw blade 34. The saw blade 34 performs an orbital motion along an imaginary ellipse in a side view by applying a swinging action in the front-back direction during the up-and-down movement.

[0034] The track switching unit 37 includes a shaft portion (not shown) and a knob portion (shown). The shaft portion is in the shape of a shaft extending in the left-right direction. The shaft portion is disposed inside the housing 10 . The knob portion is fixed to the left end portion of the shaft portion. The knob portion is arranged on the left side of the left surface of the housing 10. The knob portion extends radially outward of the shaft portion. The user can rotate the orbit switch 37 around the imaginary central axis of the shaft by operating the knob. The rotation of the shaft of the orbit switch 37 switches the presence or absence of the swing of the orbital motion part 36 and the degree of the swing.

[0035] The weight portion 38 has a counterweight (not shown). The counterweight of the weight portion 38 moves up and down in a phase opposite to that of the slider 30, the tool attachment portion 32, and the saw blade 34. This suppresses vibration caused by the reciprocating movement of the slider 30, the tool attachment portion 32, and the saw blade 34.

[0036] The guard 39 extends in the up-down direction. The upper end of the guard 39 is held by the housing 10 . The lower end of the guard 39 is adjacent to the upper surface of the base 6 . The saw blade 34 is arranged behind the guard 39 .

[0037] Figure 7 It is an exploded perspective view of the front surface, the lower surface, and the left surface of the base portion 6 and the auxiliary base 1. The base portion 6 is attached to the main body portion 2 at the lower side of the main body portion 2. The base portion 6 includes a base 60 , a base plate 62 , a plurality of (four) screws 63 , a fastening plate 64 , bolts 66 , and a cover plate C. As shown in FIG.

[0038] The base 60 is made of aluminum die-cast alloy and has a plate shape that expands forward, backward, left and right. The base 60 includes a base body 70 , a raised portion 71 , a plurality of (four) threaded holes 72 , a scale mounting portion 74 , and a pressing bolt 75 .

[0039] The base body 70 is plate-shaped. The front portion of the base body 70 is bifurcated. The saw blade 34 can pass between the bifurcated portions of the base body 70 . The raised portion 71 is disposed at the center of the base body 70. The raised portion 71 is raised upward relative to the base body 70. A cross hole 71X is formed at the center of the raised portion 71. The cross hole 71X is in a "+" shape and extends forward and backward and left and right. The portion of the cross hole 71X extending left and right is in an arc shape when viewed from the front to the rear. The screw holes 72 are arranged at adjacent portions of four corners of the base body 70. Each screw hole 72 extends in the up-down direction.

[0040] The scale mounting portion 74 is arranged at each front end portion of the two-branched portion of the base body 70. The scale mounting portion 74 has a plurality of (a pair of) hole portions 74H and a plurality of (a pair of) threaded hole portions 74S. Each hole portion 74H extends in the left-right direction. Each hole portion 74H can be inserted with a scale not shown. Each threaded hole portion 74S extends in the up-down direction. Each threaded hole portion 74S can insert a pressing bolt 75 for pressing the scale from the upper side to the lower side. The scale mounting portion 74 can mount a scale. The scale is, for example, a parallel scale that guides the cutting of the wire saw J in parallel with the surface of the workpiece W. The pressing bolt 75 may be a component of the base portion 6 other than the base body 70 , a component of the auxiliary base 1 , or a component independent of the jigsaw J. A plurality of pressing bolts 75 may be used.

[0041] The base plate 62 is a plate-shaped metal such as a steel plate. By arranging the base plate 62 on the lower surface of the base 6, wear of the base 6 due to contact with the workpiece W is suppressed. The base plate 62 has a base plate body 80 , a hole 82 , a plurality of (four) screw holes 84 , and a plurality of (three) bulging portions 88 .

[0042] The substrate body 80 is plate-shaped. The front portion of the substrate body 80 is bifurcated. The saw blade 34 can pass between the bifurcated portions of the substrate body 80. The substrate body 80 has the same shape and size as the substrate body 70 when viewed from above.

[0043] The hole 82 is arranged at the center of the substrate body 80. The hole 82 is arranged below the intersecting hole 71X of the base 60. The screw holes 84 are arranged at adjacent portions of the four corners of the substrate body 80. The screw holes 84 extend in the up-down direction. The arrangement of the screw holes 84 is the same as the arrangement of the screw holes 72 of the base 60 when viewed from below.

[0044] Due to the curvature of the substrate body 80 , each bulging portion 88 bulges upward relative to the substrate body 80 . One bulge 88 extends in the front-rear direction of the hole 82. Due to the bulge 88, the cross section of the bulge 88 and its adjacent portion is formed into an Ω shape when viewed from the rear. The other two bulging parts 88 extend in the front-rear direction. The two bulging parts 88 are respectively arranged at the root of the bifurcated part of the substrate body 80. The rigidity of the substrate 62 is improved by forming the bulging portions 88. At least one of the bulging portions 88 may be omitted.

[0045] Each screw 63 enters any one of the threaded hole 72 and the corresponding threaded hole 84. Each screw 63 combines the base 60 and the base plate 62.

[0046] The fastening plate 64 is plate-shaped. The cross section of the fastening plate 64 is arched. A bolt hole 64X is provided in the center of the fastening plate 64. The fastening plate 64 may also be omitted. The bolt 66 extends in the vertical direction with the head portion facing downward. The bolt 66 passes through the bolt hole 64X and the cross hole 71X and enters a nut (not shown) held by the housing 10 . The base portion 6 is fixed to the main body portion 2 by means of bolts 66 inserted into nuts and the fastening plates 64 .

[0047] The user can change at least one of the posture of the main body 2 and the handle 4 relative to the base 6 (the tilt angle of the main body 2 and the handle 4 to the left or right), and the relative position of the main body 2 and the handle 4 relative to the base 6 in the front-to-back direction as needed.

[0048] At this time, the user aligns the wrench (not shown) through the hole 82 with the head of the bolt 66 and loosens the bolt 66. As a result, the base 6 is released from being fixed to the main body 2, and the bolt 66 can be moved along the cross hole 71X. The user can change the posture of the main body 2 and the handle 4 relative to the base 6 by moving the bolt 66 along the portion of the cross hole 71X extending to the left and right. In other words, the inclination angle of the main body 2 and the handle 4 relative to the base 6 can be changed. The base 6 of the main body 2 and the handle 4 can be tilted relative to the base 6. The user tightens the bolt 66 in the desired posture to complete the posture change.

[0049] exist Figure 1 , Figure 2 , Figure 4 and Figure 6 In the figure, the main body 2 and the handle 4 are tilted 45° to the right relative to the base 6. The tilt angle refers to the angle of an imaginary plane that is orthogonal to the base 6 and extends in the front-rear and up-down directions relative to the plane containing the central part of the main body 2 in the left-right direction. The tilt direction of the main body 2 and the handle 4 is the left-right direction.

[0050] When changing the relative positions of the main body 2 and the handle 4 with respect to the base 6 in the front-rear direction, the user loosens the bolt 66 with a wrench and moves the bolt 66 along the front-rear extending portion of the cross hole 71X. Then, the bolt 66 is tightened at a desired position. When the bolt 66 is located at the intersection of the portion extending in the front-back direction and the portion extending in the left-right direction of the cross hole 71X, the main body 2 and the handle 4 are in the basic position relative to the base 6. Figure 1 , Figure 2 , Figure 4 as well as Figure 6 When tilted 45° to the right as shown in the figure, the entire center of gravity of the jigsaw J with the battery 8 installed is located at Figure 2 The position of the center of gravity G.

[0051] The auxiliary base 1 extends in the left-right direction. The auxiliary base 1 has a head 100 and a leg 102. The head 100 is made of plastic. The head 100 includes a head body 110 , a first recess 111 , a second recess 112 , a slit 114 , a first projection 115 , and a second projection 116 .

[0052] The head body 110 is block-shaped. The first recess 111 is arranged on the upper surface of the head body 110. The first recess 111 is recessed downward relative to the upper surface of the head body 110. The first protrusion 115 is formed on the upper part of the head body 110 by the first recess 111. The first protrusion 115 protrudes upward from the bottom surface of the first recess 111. The first protrusion 115 is rectangular and surrounds the central part of the upper surface of the head body 110. In addition, the first recess 111 and the first protrusion 115 are opposite parts, and only one of them can be grasped.

[0053] The second recess 112 is arranged on the lower surface of the head body 110. The second recess 112 is recessed upward relative to the lower surface of the head body 110. The second protrusion 116 is formed at the lower part of the head body 110 by the second recess 112. The second protrusion 116 protrudes downward from the bottom surface of the second recess 112. The second protrusion 116 is rectangular and surrounds the central part of the lower surface of the head body 110. The size of the second recess 112 in the up-down direction, that is, the depth, is shallower than the depth of the first recess 111. The size of the second protrusion 116 in the up-down direction, that is, the height, is lower than the height of the first protrusion 115. In addition, the second concave portion 112 and the second convex portion 116 are opposite parts, and only one of them may be grasped. The depth of the second concave portion 112 may be greater than the depth of the first concave portion 111. The height of the second convex portion 116 may be greater than the height of the first convex portion 115. The shape of at least one of the first convex portion 115 and the second convex portion 116 may be a shape other than a rectangle.

[0054] The slit 114 extends rightward from the center of the left surface of the head body 110. The size of the slit 114 is the same as the size of the right end of the leg 102. In addition, at least any one of the first recessed portion 111 and the second recessed portion 112 and the first convex portion 115 and the second convex portion 116 may be omitted.

[0055] The leg portion 102 is a metal plate and extends in the left-right direction. The right end of the leg 102 enters the slit 114. The leg 102 is fixed to the head 100. The head 100 and the leg 102 are connected to each other. The leg 102 protrudes from the left surface of the head 100 to the left. The shape of the right end of the leg 102 is the same as the shape of the hole 74H of the scale mounting portion 74. The vertical distance from the lower surface of the leg 102 to the lower surface of the head body 110 corresponds to the vertical distance from the lower surface of the hole 74H to the lower surface of the base 6.

[0056] The auxiliary base 1 is mounted on the base 6 by fixing the leg 102 to the scale mounting portion 74. The auxiliary base 1 is arranged in front of the saw blade 34. The front-back direction is orthogonal to the left-right direction and the up-down direction. The leg 102 is a mounted portion mounted to the mounting portion of the base 6.

[0057] exist Figure 1 , Figure 2 , Figure 4 and Figure 6 In the case of , the left portion of the leg 102 passes through the hole portions 74H of both sides from the right to the left. A pressing bolt 75 is inserted into the threaded hole portion 74S on the right. The pressing bolt 75 presses the central portion of the leg 102 downward. If the leg 102 is inserted deeper to the left relative to the hole 74H, the head 100 is located relatively to the left. If the leg 102 is inserted shallowly relative to the hole 74H, the head 100 is located relatively to the right. Therefore, the position of the auxiliary base 1 in the left-right direction relative to the base 6 can be adjusted. The user can fix the auxiliary base 1 to the base 6 by tightening the pressing bolt 75 at any position.

[0058] The lower surface of the head 100 of the auxiliary base 1 mounted on the base 6, that is, the lower end of the second protrusion 116, contacts the upper surface of the workpiece W together with the lower surface of the base 6. The lower surface of the head 100 and the lower surface of the base 6 are included in the same imaginary plane.

[0059] The right end of the head 100 is arranged at a position to the right of the center of gravity G of the entire jigsaw J in the left-right direction of the main body 2. Since the main body 2 is inclined to the right, the right end of the head 100 is arranged at a position closer to the inclined side of the main body than the center of gravity G. The inclined side of the main body is the side on which the main body 2 is inclined. Therefore, the head 100 of the auxiliary base 1 supports the main body 2 and the handle 4 inclined to the right at a position closer to the inclined side of the main body relative to the center of gravity G, so that the main body 2 and the handle 4 are sufficiently stable.

[0060] like Figure 2 As shown, the auxiliary width WA is greater than the width WB of the base 6, wherein the auxiliary width WA is the distance from the right end of the auxiliary base 1 to the center of the base in the left-right direction, and the width WB of the base 6 is the size of the base 6 in the left-right direction. Here, the size of the base 6 in the left-right direction is the size of the base 6 in the tiltable direction of the main body 2 and the handle 4. The right end of the auxiliary base 1 is the right side of the second protrusion 116. The second protrusion 116 is a contactable portion of the auxiliary base 1 that can contact the workpiece W. Therefore, the main body 2 and the handle 4 are sufficiently stable. The above stability can be obtained even when the tilt angle is other than 45° to the right.

[0061] exist Figure 1 , Figure 2 , Figure 4 as well as Figure 6 In the case of , the first distance, which is the distance in the vertical direction from the leg portion 102 to the lower end portion of the second protrusion 116 , corresponds to the distance from the hole portion 74H to the lower surface of the substrate 62 .

[0062] Figure 8 FIG. 1 is a central cross-sectional view of the auxiliary base 1 with the cover C installed. Figure 8 In FIG. 1 , the cover plate C is only partially indicated by a two-dot chain line. The cover plate C is made of plastic and can be mounted on the base 60. The cover plate C covers the base 60 and the lower part of the base plate 62. The cover plate C suppresses scratches on the workpiece W caused by the sliding of the metal base plate 62. The lower surface of the cover plate C contacts the workpiece W. The cover plate C is softer than the base plate 62. Therefore, for example, scratches on the workpiece W such as wood that is easily damaged by the base plate 62 are suppressed. In addition, the cover plate C may be a component independent of the base portion 6 or the jigsaw J.

[0063] When the cover plate C is mounted, the height of the hole 74H of the scale mounting portion 74 , more specifically, the distance from the lower surface of the hole 74H to the lower surface of the base 6 is increased by the thickness of the cover plate C.

[0064] When the cover C is installed, the auxiliary base 1 is passed through each hole 74H in a manner upside down relative to when the cover C is not installed, and is fixed by the pressing bolt 75. Figure 8 In the embodiment, the second distance, which is the distance in the vertical direction from the leg portion 102 to the lower end portion of the first protrusion 115, corresponds to the distance from the hole portion 74H to the lower surface of the cover plate C. At this time, the lower end portion of the first protrusion 115 contacts the upper surface of the workpiece W as a contactable portion. The second distance is different from the first distance. When attaching the cover C, the user attaches the auxiliary base 1 upside down relative to when the cover C is not attached. This stabilizes the jigsaw J. In this case, the user can also adjust the left-right position of the auxiliary base 1 relative to the base 6.

[0065] Fig. 9 FIG. 2 is an enlarged view of the auxiliary base and its surroundings when the main body 2 and the handle 4 are tilted to the left. Fig. 9 Cover C is not installed. When the main body 2 and the handle 4 are tilted to the left, the leg 102 of the auxiliary base 1 passes through each hole 74H from the left to the right. The pressing bolt 75 is inserted into the left threaded hole 74S. Thus, the head 100 is disposed on the left side of the base 6. Therefore, even when the body 2 and the handle 4 are tilted to the left, the auxiliary base 1 can improve the stability of the jigsaw J. In this case, the user can also adjust the position of the auxiliary base 1 relative to the base 6 in the left-right direction.

[0066] The auxiliary base 1 can be selectively attached and detached with respect to the left side or the right side of the base portion 6. That is, the auxiliary base 1 can be selectively attached and detached with respect to both sides of the base portion 6 in the left-right direction. The auxiliary base 1 supports the right side of the base 6 when the main body 2 is tilted to the right, and supports the left side of the base 6 when the main body 2 is tilted to the left, through the first convex portion 115 or the second convex portion 116 as the contactable portion. That is, the first convex portion 115 or the second convex portion 116 can selectively support both sides of the base 6 in the left-right direction.

[0067] An operation example of the jigsaw J will be described. The user adjusts the desired inclination angle of the main body 2 and the handle 4 by tilting the main body 2 and the handle 4 as needed. The user mounts the saw blade 34 on the top tool mounting portion 32. The saw blade 34 is mounted on the top tool mounting portion 32 by passing through the upper end and finally slightly pressing in. The user mounts the charged battery 8 on the battery mounting portion 18. The user switches the orbital motion mode of the saw blade 34 by operating the orbital switching portion 37 as needed. The user operates the main power switch 26 to turn on the main power of the jigsaw J.

[0068] When the user holds the handle 4 and operates the trigger 48, the main switch 46 is turned on. Then, the controller 20 supplies the electric power of the battery 8 to the motor 12 under control so that the motor shaft 50 rotates at a controlled speed. The speed of the motor shaft 50 is controlled according to the rotation position of the speed adjustment switch 22 or the state of the signal of the main switch 46 that changes with the operation amount of the trigger 48. Accordingly, the motor 12 is driven at a speed corresponding to the rotation position of the speed adjustment switch 22 and the operation amount of the trigger 48. In addition, the rotation direction of the motor shaft 50 can also be set to be switchable. The rotational force of the motor shaft 50 is converted into reciprocating motion by the power transmission unit 28 and transmitted to the slider 30 , the tip tool mounting unit 32 , and the saw blade 34 .

[0069] The fan 14 rotates due to the rotation of the motor shaft 50, thereby forming a flow of air (ie, wind) in the main body 2. This cools the internal mechanism of the jigsaw J including the motor 12.

[0070] The user can turn on the lock switch 42 as needed while pressing the trigger 48 upward. In this case, the controller 20 maintains the rotation of the motor shaft 50 regardless of the state of the main switch 46. Therefore, by operating the lock switch 42, the user can continue to move the saw blade 34 up and down without continuously operating the trigger 48 upward. When the lock switch 42 is switched from on to off, the maintained rotation of the motor shaft 50 is released.

[0071] Then, the user brings the workpiece action portion of the reciprocating saw blade 34 into contact with the workpiece W, and moves the saw blade 34 relative to the workpiece W. As a result, the workpiece W is cut by the saw blade 34. As the saw blade 34 moves, the lower surface of the base 6 rubs against the upper surface of the workpiece W.

[0072] The user installs the auxiliary base 1 according to the state of the main body 2 and the handle 4 as needed. By installing the auxiliary base 1, the user can cut the workpiece W with the wire saw J in a state of improved stability. In the case where the user wants to open the periphery of the base 6 and does not need the auxiliary base 1, the user can perform processing with the wire saw J with the auxiliary base 1 removed. When the saw blade 34 is brought into contact with the edge of the workpiece W to start cutting, since the auxiliary base 1 is located in front of the saw blade 34, the user can bring the auxiliary base 1 into contact with the workpiece W before the saw blade 34 contacts the workpiece W. Therefore, the jigsaw J can perform cutting work in a sufficiently stable state.

[0073] The first recess 111 and the second recess 112 are provided on the head 100 of the auxiliary base 1. Therefore, when the first recess 111 or the second recess 112 is on the lower side and the first protrusion 115 or the second protrusion 116 is rubbed against the upper surface of the workpiece W as a contactable portion, the friction force is reduced compared to when the first recess 111 or the second recess 112 is not provided. When the first recess 111 or the second recess 112 is on the upper side, the user can put the fingertips into the first recess 111 or the second recess 112. Therefore, the stability of the jigsaw J is improved, and the ease of processing by the jigsaw J is improved.

[0074] The depth of the first recess 111 is different from the depth of the second recess 112. The height of the first protrusion 115 is different from the height of the second protrusion 116. Therefore, the user can easily grasp which side of the first recess 111 or the second recess 112 should be installed as the upper side according to whether the cover plate C is installed. That is, when the cover plate C is not installed, the auxiliary base 1 is installed with the deeper first recess 111 as the upper side. When the cover plate C is installed, the auxiliary base 1 is installed with the shallower second recess 112 as the upper side.

[0075] When the processing is completed, the user stops the sliding operation of sliding the trigger 48 upward, and turns off the motor 12. At this time, the saw blade 34 stops. The user appropriately turns off the main power switch 26 and removes the battery 8, the saw blade 34, and the auxiliary base 1.

[0076] In addition, the first aspect and its modified examples are not limited to the above-mentioned aspects, and for example, the following changes may be appropriately implemented. The auxiliary base 1 may have a structure other than the structure including the head 100 and the leg 102 . The base portion 6 may be formed of only the base 60 , may be formed of the base 60 and the cover plate C, or may be formed of four or more members. At least one of the function of changing the posture of the base 6 relative to the main body 2, the function of changing the front-rear position of the base 6 relative to the main body 2, the orbital motion function, the locking function, the scale mounting function, and the main power supply function provided separately from the trigger 48 may be omitted, or other forms may be provided. A mounting portion dedicated to the auxiliary base 1 may also be formed on the base 6.

[0077] The wire saw J may also be driven by the AC power of a commercial power source by having a power cord instead of the battery mounting portion 18. The material of at least one of the various boxes and shells may be changed to resin, metal, or a combination thereof. The division of the shell 10 may also be different from the above. In addition, at least one of the various components, the number of parts, the presence or absence of a setting, the material, the configuration, the structure, and the form may also be appropriately changed. The above-described embodiment or its modified example may also be applied to a jigsaw to which a tip tool other than the saw blade 34 is attached.

[0078] Next, the second aspect of the embodiment will be described. Fig. 10A It is a perspective view of the auxiliary base 201 in the jigsaw of the second embodiment. Fig. 10B is the auxiliary base 201 and Fig. 10A A perspective view of the opposite side. The second embodiment is the same as the first embodiment except for the auxiliary base 201. In the second embodiment, the same components and parts as those of the first embodiment are appropriately denoted by the same reference numerals as those of the first embodiment, and the description thereof is omitted.

[0079] The auxiliary base 201 is the same as the auxiliary base 1 of the first embodiment except for the head 210 . The head 210 is made of plastic and includes a head body 220 , a first recess 221 , a second recess 222 , a slit 114 , a first protrusion 225 , a second protrusion 226 , a first concavo-convex portion 227 , and a second concavo-convex portion 228 .

[0080] The head body 220 is block-shaped or plate-shaped. The head body 220 is larger than the head body 110. In addition, the size of the head body 220 may be smaller than the size of the head body 110.

[0081] The first recessed portion 221 is disposed on the upper surface of the head body 220. The first recessed portion 221 is recessed downward relative to the upper surface of the head body 220. The first protrusion 225 is formed on the upper portion of the head body 220 by the first recessed portion 221. The first protrusion 225 protrudes upward from the bottom surface of the first recessed portion 221. The first protrusion 225 is rectangular and surrounds the central portion of the upper surface of the head body 220. In addition, the first recessed portion 221 and the first protrusion 225 are opposite portions, and only one of them may be grasped.

[0082] The second recessed portion 222 is disposed on the lower surface of the head body 220. The second recessed portion 222 is recessed upward relative to the lower surface of the head body 220. The second protrusion 226 is formed at the lower portion of the head body 220 by the second recessed portion 222. The second protrusion 226 protrudes downward from the bottom surface of the second recessed portion 222. The second protrusion 226 is rectangular and surrounds the central portion of the lower surface of the head body 220.

[0083] The size in the up-down direction of the second recess 222, i.e., the depth, is shallower than the depth of the first recess 221. The size in the up-down direction of the second protrusion 226, i.e., the height, is lower than the height of the first protrusion 225. In addition, the second recess 222 and the second protrusion 226 are opposite parts, and only one of them may be grasped. The depth of the second recess 222 may be greater than the depth of the first recess 221. The height of the second protrusion 226 may be greater than the height of the first protrusion 225. The shape of at least one of the first protrusion 225 and the second protrusion 226 may be a shape other than a rectangle. The slit 114 extends rightward from the center portion of the left surface of the head body 220 . In addition, at least any one of the first recessed portion 221 and the second recessed portion 222 and the first convex portion 225 and the second convex portion 226 may be omitted.

[0084] The first concavoconvex part 227 has a portion protruding upward from the bottom surface of the first concave part 221 and a portion recessed downward between the protruding portions. The first concavoconvex part 227 is surrounded by the first convex part 225. The first concavoconvex part 227 has a dot-shaped part 230, a plurality of (4) circular parts 231, a plurality of (2) arc-shaped parts 232, and a plurality of (12) radial parts 234.

[0085] The dot-shaped portion 230 is a cylindrical shape protruding upward. The height of the dot-shaped portion 230 is lower than the height of the first protrusion 225 . Each circular portion 231 protrudes upward. When viewed from above, each circular portion 231 is a circle centered on the dot-shaped portion 230. Each circular portion 231 is arranged in a concentric circle shape when viewed from above. The height of each circular portion 231 is lower than the height of the first convex portion 225 and higher than the height of the dot-shaped portion 230.

[0086] Each arc-shaped portion 232 protrudes upward. In a top view, each arc-shaped portion 232 is an arc centered on the dot-shaped portion 230. The arc-shaped portion 232 is arranged at the left and right positions of the outer circular portion 231. The height of each arc-shaped portion 232 is lower than the height of the first convex portion 225, and is higher than the height of the dot-shaped portion 230 and the height of each circular portion 231. The upper ends of the dot-shaped portion 230, each circular portion 231 and each arc-shaped portion 232 are arranged along an imaginary spherical surface protruding downward. In addition, only the upper ends of each circular portion 231 may be arranged along an imaginary spherical surface protruding downward, and the other upper ends may be arranged at a position lower than the spherical surface.

[0087] Each radial portion 234 protrudes upward. In a plan view, each radial portion 234 is radial with the dot portion 230 as the center. Each radial portion 234 extends from the dot portion 230 to the outer circular portion 231 and the arc portion 232. The height of each radial portion 234 is lower than the height of the first convex portion 225. In addition, at least any one of the presence or absence and number of the dot-shaped portions 230 , the circular portions 231 , the arc-shaped portions 232 , and the radial portions 234 , and the height, size, arrangement, and shape may be changed to other than those described above.

[0088] The second concavoconvex part 228 has a portion protruding downward from the bottom surface of the second concave part 222 and a portion recessed upward between the protruding portions. The second concavoconvex part 228 is surrounded by the second convex part 226. The second concavoconvex part 228 has a disk-shaped part 240 and a plurality of (four) circular parts 241.

[0089] The disc-shaped portion 240 is in the shape of a disc protruding downward. The height of the disc-shaped portion 240 is lower than the height of the second protrusion 226 . Each circular portion 241 protrudes downward. When viewed from above, each circular portion 241 is a circle centered on the disc-shaped portion 240. The circular portions 241 are arranged in concentric circles when viewed from the bottom to the top. The height of each circular portion 241 is lower than the height of the second convex portion 226 and higher than the height of the disc-shaped portion 240. The upper end portions of the disc-shaped portion 240 and each circular portion 241 are configured to extend along an imaginary spherical surface protruding upward.

[0090] In addition, only the upper end of each circular portion 231 may be arranged along an imaginary spherical surface convex upward, and the other upper ends may be arranged at a position lower than the spherical surface. The presence or absence and number of the disc-shaped portion 240 and the circular portion 241, as well as at least one of the height, size, arrangement and shape may also be changed to other than the above.

[0091] The head 210 of the auxiliary base 201 is larger than the head 100. When mounted on the scale mounting portion 74, the rear end of the head 210 is arranged behind the saw blade 34 in the front-rear direction. The head 210 extends further rearward than the saw blade 34. The first convex portion 225 and the second convex portion 226, which are contactable portions in the head 210, both extend further rearward than the saw blade 34. Accordingly, the jigsaw J is more stable than a case where neither the first convex portion 225 nor the second convex portion 226 extends rearward of the saw blade 34.

[0092] The first recessed portion 221 and the second recessed portion 222 are provided on the head portion 210 of the auxiliary base 201. Therefore, when the first recessed portion 221 or the second recessed portion 222 is on the lower side and the first protrusion 225 or the second protrusion 226 is rubbed against the upper surface of the workpiece W as a contactable portion, the friction force is reduced compared to when the first recessed portion 221 or the second recessed portion 222 is not provided. When the first recessed portion 221 or the second recessed portion 222 is on the upper side, the user can place the fingertips on the first concavoconvex portion 227 or the second concavoconvex portion 228. The first concavoconvex portion 227 and the second concavoconvex portion 228 have an anti-slip effect due to their concavoconvex shapes. Therefore, the stability of the wire saw J is improved, and the ease of processing by the wire saw J is improved.

[0093] The shape of the first concavo-convex part 227 is different from the shape of the second concavo-convex part 228. The height of the first convex part 225 is different from the height of the second convex part 226. Therefore, the user can easily grasp which side of the first concave part 221 or the second concave part 222 should be installed as the upper side on the auxiliary base 1 according to whether the cover plate C is installed. That is, when the cover plate C is not installed, the user installs the auxiliary base 1 with the first concavo-convex part 227 side as the upper side, and installs the deeper first concave part 221 as the upper side. On the other hand, when the cover plate C is installed, the user installs the auxiliary base 1 with the second concavo-convex part 228 side as the upper side, and installs the shallower second concave part 222 as the upper side.

[0094] In addition, the second aspect has the same modified examples as the first aspect as appropriate.

Claims

1. An auxiliary base (1, 201) which can be mounted on a jigsaw (J), the jigsaw (J) comprising a base portion (6) capable of contacting a workpiece (W) and a main body portion (2) capable of tilting in a left-right direction relative to the base portion (6), It is characterized in that The auxiliary base (1, 201) has a contactable portion (115, 116), which is a portion that can contact the workpiece (W) when installed, and the contactable portion (115, 116) is installed in a state where the auxiliary width (WA) is larger than the width (WB) of the base portion (6) in the left and right directions, wherein the auxiliary width (WA) refers to the distance from the contactable portion (115, 116) to the center of the base portion (6) in the left and right directions of the main body (2).

2. The auxiliary base (1, 201) according to claim 1, characterized in that: In the left-right direction of the main body (2), the contactable portions (115, 116) are arranged on the side where the main body (2) is inclined, that is, on the inclined side of the main body, relative to the center of gravity (G) of the wire saw (J) when the inclination angle of the main body (2) is 45 degrees.

3. An auxiliary base (1, 201) which can be mounted on a jigsaw (J), the jigsaw (J) comprising a base portion (6) capable of contacting a workpiece (W) and a main body portion (2) capable of tilting in a left-right direction relative to the base portion (6), It is characterized in that The auxiliary base (1, 201) has a contactable portion (115, 116), and the contactable portion (115, 116) is a portion that can contact the workpiece (W) during installation. In the left-right direction of the main body (2), the contactable portions (115, 116) are arranged on the side where the main body (2) is inclined, that is, on the inclined side of the main body, relative to the center of gravity (G) of the wire saw (J) when the inclination angle of the main body (2) is 45 degrees.

4. The auxiliary base (1, 201) according to any one of claims 1 to 3, characterized in that: The jigsaw (J) has a battery (8) and a battery mounting portion (18).

5. The auxiliary base (1, 201) according to any one of claims 1 to 4, characterized in that: The position of the auxiliary base (1, 201) relative to the base portion (6) in the left-right direction can be adjusted.

6. The auxiliary base (1, 201) according to any one of claims 1 to 5, characterized in that: The auxiliary base (1, 201) can be selectively disassembled and assembled on both sides in the left-right direction relative to the base portion (6).

7. The auxiliary base (1, 201) according to any one of claims 1 to 6, characterized in that: The contactable portions (115, 116) can selectively support both sides of the base portion (6) in the left-right direction.

8. The auxiliary base (1, 201) according to any one of claims 1 to 7, characterized in that: It also has a head (100, 210) and legs (102, 212), wherein: The head (100, 210) has the contactable portion (115, 116); The leg portions (102, 212) extend in the left-right direction and are mounted on the base portion (6). The head (100, 210) is connected to the leg (102, 212) in a state where a first distance and a second distance are different from each other, wherein the first distance is the distance from the upper surface in the up-down direction orthogonal to the left-right direction to the leg (102, 212), and the second distance is the distance from the lower surface in the up-down direction to the leg (102, 212).

9. The auxiliary base (1, 201) according to any one of claims 1 to 8, characterized in that: The base portion (6) has a scale mounting portion (74), The auxiliary base (1, 201) can be mounted on the scale mounting portion (74).

10. The auxiliary base (1, 201) according to any one of claims 1 to 9, characterized in that: The main body (2) has a saw blade (34). The auxiliary base (1, 201) is arranged at the front in the front-rear direction orthogonal to the left-right direction.

11. The auxiliary base (1, 201) according to any one of claims 1 to 10, characterized in that: The contactable portions (115, 116) extend rearward of the saw blade (4) in the front-rear direction.

12. The auxiliary base (200) according to any one of claims 1 to 11, characterized in that: It also has concave and convex parts (227, 228).

13. The auxiliary base (200) according to claim 12, characterized in that: The device comprises a convex portion (115, 116) having a height greater than that of the concave-convex portion (227, 228) and surrounding the concave-convex portion (227, 228).

14. The auxiliary base (200) according to claim 12 or 13, characterized in that: The plurality of protrusions (115, 116) have mutually different shapes.

15. A wire saw (J), characterized in that A supplementary base (1, 200) according to any one of claims 1 to 14 is provided.

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