bench top cutting machine

Abstract

A desk cutting machine is provided. A fine adjustment mechanism (50) has a handle member (51) and an auxiliary member (55). The handle member (51) functions as a lever having a fulcrum portion (51X), an action point portion (51Y), and a force receiving point portion (51Z). The auxiliary member (55) functions as a lever having an auxiliary fulcrum portion (55X), an auxiliary action point portion (55Y), and an auxiliary force receiving point portion (55Z). By up and down operation of the auxiliary force receiving point portion (55Z) of the auxiliary member (55), the handle member (51) is rotated, and the left and right tilt positions of the cutting machine main body (10) can be finely adjusted with a small force. The release operation of the fine adjustment mechanism (50) is not particularly required when it is not necessary. Accordingly, in the desk cutting machine, the operability of the fine adjustment mechanism for fine adjustment of the left and right tilt positions of the cutting machine main body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a bench type cutting machine for cutting workpieces such as wood. BACKGROUND

[0002] A bench type cutting machine has a worktable for placing a workpiece and a cutting machine main body having a circular plate-shaped cutter. The bench type cutting machine cuts the workpiece placed on the worktable from above by the circular plate-shaped cutter. The bench type cutting machine has a function for performing so-called miter cutting, that is, tilting the cutting machine main body to the left or right to make the cutter cut the workpiece obliquely. Various techniques for positioning the cutting machine main body at an arbitrary tilt angle have been provided.

[0003] In the tilt positioning mechanism disclosed in Patent Literature 1, an intermediate base is installed between a tilting portion of the cutting machine main body and a tilting support portion that supports the cutting machine main body tiltable. The position of the intermediate base in the left-right tilting direction can be adjusted by loosening a fixing screw. In a state where the intermediate base is fixed by tightening the fixing screw, the tightening amount of a positioning screw can be adjusted to finely adjust the tilt angle of the cutting machine main body. After the fine adjustment, the cutting machine main body can be fixed at the positioned tilt angle by tightening a main body fixing screw.

[0004] In the tilt positioning mechanism disclosed in Patent Literature 2, there is an operation portion that is operated in rotation about an axis parallel to the tilting axis of the cutting machine main body. The tilt angle of the cutting machine main body can be finely adjusted by rotating the operation portion to rotate a pinion and change the meshing position of the pinion with a rack provided on the tilting support side. After the fine adjustment, the cutting machine main body can be fixed at the positioned tilt angle by tightening a main body fixing screw.

[0005] [Patent Literature]

[0006] [Patent Literature]

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2006-44044

[0008] Patent Literature 2: European Patent Application Publication No. 1935543 SUMMARY

[0009] [Problems to be Solved by the Invention]

[0010] According to the positioning mechanism of Patent Document 1, in the case where fine adjustment of the tilt angle is not performed, the fixing screw is loosened in advance to make the position of the intermediate base free. This release operation is troublesome. According to the positioning mechanism of Patent Document 2, there is a problem that the rack tends to be large-sized. When a plurality of intermediate gears are interposed to avoid the large-sizing of the rack, there is a problem that the structure is complicated. In the present application, the operability is improved for the fine adjustment mechanism of the tilt position of the cutting machine main body, and the structure is simplified.

[0011] [Technical Solution for Solving Technical Problem]

[0012] According to a feature of the present application, a bench cutting machine has a table for placing a cutting object and a cutting machine main body that moves up and down with respect to the table. The cutting machine main body is supported to the table by a tilting member in a manner that can tilt left and right with respect to the table. The tilt position of the cutting machine main body is releasably fixed by a tilting fixing member. The tilt position of the cutting machine main body is adjusted by the operation of a lever member by setting the tilting fixing member to a release state. The lever member has a fulcrum portion that is connected to the table in a manner that can rotate around an axis, and an action point portion that is connected to the tilting member. The lever member has an arm portion that extends from the fulcrum portion, and has a force receiving point portion at a position farther than the distance between the fulcrum portion and the action point portion.

[0013] Therefore, the tilting member is tilted by tilting the force receiving point portion of the lever member up and down. Accordingly, the left and right tilt position of the cutting machine main body is fine-adjusted. According to the principle of a lever, the tilt position of the cutting machine main body can be fine-adjusted with a small force. In addition, the lever member does not need to be particularly operated when not in use. Thus, the operability of the tilt positioning mechanism is improved, and the structure is simplified.

[0014] According to another feature of the present application, the fulcrum portion is in the central region in the length direction of the lever member. The action point portion is on one end side in the length direction with respect to the fulcrum portion. The force receiving point portion is on the other end side in the length direction. Therefore, the operation force applied to the force receiving point portion can be efficiently transmitted to the action point portion.

[0015] According to another feature of the present application, the force receiving point portion can protrude to the side of the tilting member and left and right directions with respect to the fulcrum portion, and can tilt up and down. Therefore, the tilt position of the cutting machine main body can be fine-adjusted with a small operation force.

[0016] According to another feature of the present application, an auxiliary member having an auxiliary fulcrum portion, an auxiliary action point portion, and an auxiliary force receiving point portion is provided between the handle member and a tilting support portion that supports the tilting member in a tiltable manner. One of the auxiliary fulcrum portion or the auxiliary action point portion is connected to the tilting support portion, and the other is connected to the handle member. The distance between the auxiliary force receiving point portion and the auxiliary fulcrum portion is greater than the distance between the auxiliary action point portion and the auxiliary fulcrum portion.

[0017] Therefore, the handle member is operated with a smaller force by the auxiliary member using the lever principle. Accordingly, the operability of the fine adjustment mechanism can be further improved.

[0018] According to another feature of the present application, the auxiliary fulcrum portion is connected to the tilting member, and the auxiliary action point portion is connected to the force receiving point portion of the handle member. Therefore, the force receiving point portion of the handle member can be operated up and down by operating the auxiliary member.

[0019] According to another feature of the present application, the tilting member and the auxiliary member are disposed on the front side of the handle member in the tilting axis direction of the tilting member. Therefore, the handle member is disposed behind the tilting member and the auxiliary member. Accordingly, the handle member and the auxiliary member can be made compact in the tilting axis direction with respect to the tilting member.

[0020] According to another feature of the present application, the fulcrum portion of the handle member and the fulcrum portion of the auxiliary member have mutually parallel rotation axes. Therefore, the operation direction of the auxiliary member coincides with the tilting direction of the cutter main body, and the auxiliary member can be intuitively operated. Accordingly, the operability of the tilt angle fine adjustment mechanism is improved.

[0021] According to another feature of the present application, the fulcrum portion of the handle member is connected to the table via an avoiding portion provided in the tilting member. Therefore, the fulcrum portion of the handle member is disposed closer to the tilting axis (tilting center) of the tilting member. Accordingly, the lever principle can be more efficiently utilized.

[0022] According to another feature of the present application, the avoiding portion is formed in the shape of a long slot hole along a circular arc having the tilting axis of the tilting member as a center axis. Therefore, the avoiding portion can be provided without significantly reducing the strength of the tilting member.

[0023] According to another feature of the present application, a bench cutting machine has a table for placing a workpiece to be cut and a cutting machine body that moves up and down with respect to the table. The cutting machine body is supported to the table by a tilting member so as to be able to tilt left and right with respect to the table. The tilting position of the cutting machine body is releasably fixed by a tilting fixing member. The tilting position of the cutting machine body is adjusted by operation of a lever member by setting the tilting fixing member to a release state. The lever member has a fulcrum portion that is connected to the table so as to be able to rotate about an axis and an action point portion that is connected to the tilting member. An arm portion extends from the fulcrum portion.

[0024] Therefore, the arm portion of the lever member is operated by up and down tilting operation, and the tilting member tilts. Accordingly, the left and right tilting position of the cutting machine body can be finely adjusted. In addition, the lever member does not need to be particularly operated when not in use. Thus, the operability of the tilting positioning mechanism is improved, and the structure is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is an overall perspective view of the bench cutting machine. This figure shows the cutting machine body in a straight cutting position and slid to the front.

[0026] Figure 2 is Figure 1 is a rear view of the bench cutting machine.

[0027] Figure 3 is a left view of the bench cutting machine. In this figure, the base, the table, and the tilting support portion are shown in longitudinal section.

[0028] Figure 4 is Figure 3 is a bottom view of the bench cutting machine. The illustration of the base is omitted in this figure.

[0029] Figure 5 is Figure 2 is a V-V sectional view of the bench cutting machine, and is a transverse sectional view of the tilting support portion.

[0030] Figure 6 is an overall perspective view of the bench cutting machine. In this figure, the fine adjustment mechanism is shown in a perspective exploded view.

[0031] Figure 7 is a rear view of the bench cutting machine. The point of the lever member and the point of the tilting member are shown by double-dot chain lines. Figure 2 is different.

[0032] Figure 8 is a perspective view of the lever member. This figure shows a state viewed from a rear oblique upper side.

[0033] Figure 9is a perspective view of the handle member. This view shows the state as viewed from the front obliquely upward.

[0034] Figure 10 is a perspective view of the auxiliary member. This view shows the state as viewed from the rear obliquely upward.

[0035] Figure 11 is a perspective view of the auxiliary member. This view shows the state as viewed from the front obliquely downward.

[0036] Figure 12 is an overall perspective view of the table cutting machine. This view shows the state as viewed from the right rear obliquely upward. This view shows the state in which the cutting machine body is tilted to the left.

[0037] Figure 13 is a view in the direction of XIII in Figure 12 , and is a rear view of the table cutting machine.

[0038] Figure 14 is an overall perspective view of the table cutting machine. This view shows the state as viewed from the right rear obliquely upward. This view shows the state in which the cutting machine body is tilted to the right.

[0039] Figure 15 is a view in the direction of XV in Figure 14 , and is a rear view of the table cutting machine.

[0040] [Legend]

[0041] W: workpiece; F: floor; 1: table saw (sliding circular saw); 2: base; 2a: second locking plate; 3: table; 3a: table extension; 3b: blade edge; 4: support shaft; 5: auxiliary table; 6: positioning stopper; 6a: positioning surface; 7: first locking plate; 7a: positioning recess; 8: table fixing member; 8a: threaded shaft portion; 9: tilt fixing member; 10: saw main body; 11: positioning pin; 11a: compression spring; 12: work shaft; 13: push member; 13a: support shaft; 14: intermediate lever; 15: lock nut; 16: push plate; 20: tilt support portion; 21: tilt receiving portion; 21a: scale plate; 21b: support shaft portion; 22: tilt shaft; J: tilt axis; 23: guide pin; S: sliding support portion; 24: sliding lever (upper side); 25: sliding lever (lower side); 26: sliding base portion; 27: swing support shaft; 28: front end member; 29: set screw; 30: tilt member; 31: tilt portion; 31a: pointer; 31b: through-hole; 31c: work slot; 35: main body base; 36: fixed cover; 36a: hollow arrow; 37: blade; 39: movable cover; 40: motor housing (electric motor); 40a: gear box (reduction gear train); 41: handle portion; 41a: lock button; 42: switch operating handle; 43: battery mounting portion; 44: battery pack; 45: handle; 45a: grip portion; 46: dust collection guide; 47: hose connection port; 48: adapter housing portion; 48a: communication adapter; 50: fine adjustment mechanism; 51: handle member; 51a: guide slot; 51b: support hole; 51c: arm portion; 51d: guide slot; 51X: fulcrum portion; 51Y: action point portion; 51Z: force point portion; L1: distance of first line connecting fulcrum portion 51X and action point portion 51Y; L2: distance of second line connecting fulcrum portion 51X and force point portion 51Z; 52: binding screw; 53: work pin; 55: auxiliary member; 55a: support hole; 55b: threaded hole; 55c: arm portion; 55X: auxiliary fulcrum portion; 55Y: auxiliary action point portion; 55Z: auxiliary force point portion; 56: guide roller. DETAILED DESCRIPTION

[0042] Next, an embodiment of the present application will be described based on Figures 1-15 In the present embodiment, a table saw 1 called a so-called sliding circular saw will be described as an example. As shown in Figures 1-4 the drawing, the table saw 1 has a base 2 to be placed on a table, a floor F, or the like, a table 3 for placing a workpiece, and a saw main body 10. A user performs a cutting operation in front of the table saw 1. In the following description, the front-rear direction of the members and structures is the front side when viewed from the user. Also, the up-down and left-right directions of the members and structures are based on the user.

[0043] The table 3 has a substantially circular shape in plan view, and the upper surface is formed as a horizontal flat surface. A workpiece W is placed on the upper surface of the table 3. As shown in Figure 3 、 Figure 4 The table 3 is supported above the base 2 so as to be rotatable in the horizontal direction about the pivot 4. The cutter main body 10 is supported by the tilt support portion 20 provided at the rear portion of the table 3 so as to be tiltable left and right. Details of the tilt support portion 20 will be described later.

[0044] A table extension portion 3a is provided at the front portion of the table 3. The table extension portion 3a extends long toward the front. The upper surface of the table extension portion 3a is flush with the upper surface of the table 3 in a coplanar manner. The workpiece W can be placed on the upper surface of the table extension portion 3a. A blade opening 3b for allowing a cutter 37 called a tipped saw blade to enter downward at the time of cutting is provided on the upper surface of the table extension portion 3a.

[0045] Auxiliary tables 5 are provided at both sides of the table 3. The left and right auxiliary tables 5 are integrally provided at both sides of the base 2. The upper surfaces of the auxiliary tables 5 are flush with the upper surface of the table 3 in a coplanar manner. A large workpiece W can be placed across the upper surface of the table 3 and the upper surfaces of the auxiliary tables 5.

[0046] Above the table 3 and the left and right auxiliary tables 5, a wall-shaped positioning baffle 6 extending in the left-right direction and upward is provided. The positioning baffle 6 is supported to the left and right auxiliary tables 5. The front surface of the positioning baffle 6, i.e., the positioning surface 6a, is located on a vertical plane passing through the center of rotation (axis of the pivot 4) of the table 3. As shown in Figure 3 The workpiece W placed on the table 3 is positioned in the front-rear direction by abutting against the positioning surface 6a.

[0047] A double system table locking mechanism for locking the horizontal rotational position is provided on the table 3. As shown in Figure 3 、 Figure 4As shown, a first locking plate 7 of a circular arc shape is provided in a substantially semicircular region of the front portion of the base 2. An angular scale for indicating the angular position of the table 3 in the horizontal direction is shown on the first locking plate 7. On the first locking plate 7, a plurality of positioning recesses 7a are provided in the direction of rotation of the table 3. The tip portion of the positioning pin 11 enters the positioning recess 7a, and the angular position of the table 3 is thereby fixed. The positioning recesses 7a are provided at a plurality of positions at suitable angular intervals. The rotational position of the table 3 is locked at the angular intervals of each of the positioning recesses 7a. The positioning pin 11 is elastically urged toward the locking side by a compression spring 11a. The locking and unlocking operations of the table locking mechanism of the first system are performed by up and down operations of an operation handle (not shown in the drawing) provided near the front portion of the table extension 3a.

[0048] In the table locking mechanism for fixing the rotational position of the table 3, in addition to the first system in which the above-described positioning pin 11 enters the positioning recess 7a, a second system is provided in which the base 2 side is clamped by the second locking plate 2a by the screw force of the push member 13.

[0049] On the front surface of the table extension 3a, in addition to the above-described operation handle, a table fixing member 8 and a tilting fixing member 9 are provided. By the rotational operation of the table fixing member 8, the table locking mechanism of the above-described second system is subjected to the locking and unlocking operations. As shown, Figure 3 As shown, the threaded shaft portion 8a of the table fixing member 8 is screwed with the lower surface of the table extension 3a. The work shaft 12 is pushed toward the center of rotation (rearward) of the table 3 by the screw force of the threaded shaft portion 8a. The work shaft 12 is arranged in parallel above the positioning pin 11 of the first system. The rear end portion of the work shaft 12 abuts against the upper portion of the push member 13 provided on the lower surface of the table 3 in a manner capable of turning up and down via a fulcrum 13a. Therefore, when the work shaft 12 is pushed rearward by the screw force, the push member 13 is rotated in the counterclockwise direction shown in the drawing about the fulcrum 13a.

[0050] The lower portion of the push member 13 is pushed to the lower surface of the second locking plate 2a by the screw force. Accordingly, the second locking plate 2a is clamped between the push member 13 and the lower surface of the table 3, and the table 3 is thereby fixed at an arbitrary angular position. As shown, Figure 4 As shown, the second locking plate 2a is a thin steel plate of a circular arc shape, and is fixed along the inner peripheral side of the first locking plate 7.

[0051] A circular ring-shaped tilting fixing member 9 is coaxially arranged behind the workbench fixing member 8. By rotating the tilting fixing member 9 to the locking side, the left and right tilting positions of the cutter main body 10 are fixed. By rotating the tilting fixing member 9 to the unlocking side, the cutter main body 10 can be tilted left and right. As shown in Figure 4 A middle rod 14 is connected to the tilting fixing member 9 via a gear train. The middle rod 14 extends in the front and back direction along the workbench extension 3a and below the workbench 3. The rear side of the middle rod 14 extends to the lower part of the tilting support 20. When the tilting fixing member 9 is rotated, the middle rod 14 rotates around the shaft. The rear part of the middle rod 14 protrudes to the rear via a through slot hole 31b provided on the tilting member 30. A threaded shaft part is provided on the rear part of the middle rod 14. A thrust plate 16 is threadedly combined on the threaded shaft part. The rotation of the thrust plate 16 relative to the tilting member 30 is limited. A locking nut 15 is fixed in front of the thrust plate 16 and on the front surface side of the tilting support 20 in a manner that cannot move in the axial direction. A thrust bearing is clamped on the rear surface side of the locking nut 15. When the tilting fixing member 9 is tightened to the locking side, the tilting support 21 and the tilting member 30 are clamped front and back by the locking nut 15 and the thrust plate 16 through the threaded force of the middle rod 14, and accordingly, the tilting position of the tilting member 30 is fixed. When the tilting fixing member 9 is tightened to the unlocking side, the clamping by the thrust plate 16 is released, so that the tilting member 30 can be tilted left and right. Accordingly, the tilting position of the cutter main body 10 can be changed.

[0052] As shown in Figures 1-4 , Figure 6 The tilting support 20 is provided on the rear part of the workbench 3. The cutter main body 10 is supported by the tilting support 20 in a manner that the left and right tilting positions can be changed relative to the workbench 3. The tilting support 20 has a tilting support 21 and a tilting member 30. The tilting support 21 is integrally provided on the rear part of the workbench 3. On the rear surface side of the tilting support 21, a tilting part 31 provided on the lower part of the tilting member 30 is combined via a tilting shaft 22. The tilting member 30 is combined with the tilting support 21 in a manner that it can be tilted left and right around the tilting shaft 22 relative to the tilting support 21. As shown in Figure 3 A scale plate 21a showing an angle scale is installed on the upper surface of the tilting support 21. A pointer 31a indicating the tilting position of the cutter main body 10 is installed on the front part of the tilting part 31. By reading the angle indicated by the pointer 31a, the tilting angle of the cutter main body 10 can be confirmed.

[0053] By rotating the tilting fixing member 9, the intermediate rod 14 is tightened toward the pressure plate 16, thus fixing the tilting part 31's tilting position relative to the tilting bearing part 21. Accordingly, the tilting position of the cutting machine body 10 is fixed. Figure 4 , Figure 5 As shown, the rear portion of the intermediate rod 14 protrudes towards the rear surface of the tilting portion 31 via an arc-shaped through-hole 31b provided on the tilting portion 31. The through-hole 31b functions as a clearance portion for the intermediate rod 14 (the fulcrum portion 51X described later) to pass through. A push plate 16 is threaded onto the protrusion of the intermediate rod 14. By tightening the intermediate rod 14 onto the push plate 16, the push plate 16 is pressed against the rear surface of the tilting portion 31, and the tilting position of the tilting portion 31 relative to the tilting support portion 21 is fixed. Therefore, by rotating the tilting fixing member 9, which is located on the user's side and easily operable near the front, the tilting position of the tilting support portion 20 is locked and unlocked.

[0054] The handle 51 of the fine-tuning mechanism 50, described later, is attached to the rear end face of the protruding portion of the intermediate rod 14. The handle 51 is attached to the rear end of the intermediate rod 14 by means of a screw 52, ​​which allows relative rotation and prevents disengagement in the thickness direction.

[0055] like Figures 1-3 As shown, a guide pin 23 is attached to the rear end of the tilting shaft 22. The guide pin 23 is inserted into an arc-shaped guide groove 51a provided on the handle member 51. The guide pin 23 guides the displacement of the handle member 51 relative to the tilting shaft 22. Details of the handle member 51 will be described later. The tilting axis J of the tilting part 31 relative to the rotation axis of the tilting bearing part 21, that is, the tilting axis J of the cutting machine body 10 tilting in the left and right direction, is aligned with the axis of the tilting shaft 22. Figure 3 As shown, the tilt axis J coincides with the upper surface of the worktable 3 when viewed from the side. Additionally, as... Figure 6 As shown, when viewed from above, the tilt axis J is aligned with the rotation center (support shaft 4) of the worktable 3 and the cutting edge 3b. The intermediate rod 14 is positioned eccentrically relative to the tilt axis 22 by a certain distance.

[0056] Between the tilting receiving portion 21 and the tilting portion 31, a tilt positioning mechanism is incorporated for positioning the straight cutting position and the left and right tilt positions (45°) of the cutting machine body 10. Although not shown, a stopper for the straight cutting position and a stopper for the left and right tilt positions are provided on the tilting receiving portion 21 side. A stop screw is provided on the tilting portion 31 side. The stop screw abuts against the stopper, thereby positioning the cutting machine body 10 in the straight cutting position or the left and right tilt positions. The usual positioning by the tilt positioning mechanism is performed by releasing the fixing state of the tilting portion 31 with respect to the tilting receiving portion 21 by rotating the tilting fixing member 9 to the unlocking side. When the tilting fixing member 9 is rotated to the locking side, the cutting machine body 10 is fixed in the straight cutting position or the left and right tilt positions.

[0057] In the state where the cutting machine body 10 is positioned in the straight cutting position, the tool is cut into the upper surface of the workpiece W at a right angle (straight cutting). In the state where the cutting machine body 10 is tilted to the left or right, the tool is obliquely cut into the upper surface of the workpiece W, that is, so-called bevel cutting is performed.

[0058] The table cutting machine 1 of the present embodiment has, in addition to the tilt positioning mechanism for positioning the cutting machine body 10 in the straight cutting position or the left and right tilt positions, a fine adjustment mechanism 50 for fine adjustment of the tilt angle of the cutting machine body 10 with the straight cutting position or the left and right tilt positions as the center. The details of the fine adjustment mechanism 50 will be described later.

[0059] The cutting machine body 10 is supported on the upper portion of the tilting member 30. The cutting machine body 10 is supported in a manner capable of sliding forward and backward by the sliding support portion S provided on the upper portion of the tilting member 30. The sliding support portion S has two sliding rods 24, 25 and a sliding base portion 26. The two sliding rods 24, 25 are supported on the upper portion of the tilting member 30. The two sliding rods 24, 25 extend forward from the upper portion of the tilting member 30 to a relatively long length. The front end portions of the two sliding rods 24, 25 are coupled to each other at a certain interval by the front end member 28. Accordingly, the two sliding rods 24, 25 are arranged in parallel with each other in the vertical direction. The sliding base portion 26 is supported on the two sliding rods 24, 25 in a manner capable of sliding forward and backward between the front end member 28 on the front side and the tilting member 30 on the rear side. The cutting machine body 10 is supported on the sliding base portion 26. Accordingly, the cutting machine body 10 is supported in a manner capable of sliding forward and backward above the work table 3 by the two sliding rods 24, 25. The forward and backward sliding position of the cutting machine body 10 can be fixed by tightening the stop screw 29 provided on the sliding base portion 26.

[0060] As Figure 3As shown, the cutting machine body 10 is supported by a swing shaft 27 in a manner that allows it to swing up and down. The cutting machine body 10 has a main body base 35. The rear part of the main body base 35 is supported on a sliding base 26 by the swing shaft 27. A semi-circular fixed cover 36 is provided at the front part of the main body base 35. The upper half-circumference of the circular plate-shaped cutter 37 is covered by the fixed cover 36. The cutter 37 is mounted on a spindle (not visible in the figure), which is rotatably mounted on the main body base 35. The lower half-circumference of the cutter 37 is covered by a movable cover 39. The movable cover 39 opens and closes in conjunction with the swinging motion of the cutting machine body 10. When the cutting machine body 10 is in the upper moving end position (standby position), the movable cover 39 is fully closed, and the lower half-circumference of the cutter 37 is almost entirely covered by the movable cover 39. When the cutting machine body 10 swings downward, the movable cover 39 is opened, and the cutter 37 is exposed. The exposed part of the cutting tool 37 cuts into the workpiece W.

[0061] like Figure 2 , Figure 6 As shown, an electric motor is mounted on the right side of the main body base 35. The electric motor is a DC brushless motor and is housed in a cylindrical motor housing 40. Hereinafter, the electric motor will be referred to as 40. The electric motor 40 is mounted with its motor axis aligned with the face of the tool 37. The output of the electric motor 40 is output to the spindle via the engagement of a reduction gear system, including bevel gears, housed in a gearbox 40a.

[0062] A ring-shaped handle portion 41 is provided at the front of the main body base 35. A switch operating handle 42 is provided on the upper inner circumference of the handle portion 41. When the fingertips of the hand holding the handle portion 41 are used to pull the switch operating handle 42 upwards, the electric motor 40 is activated, causing the cutter 37 to rotate. Figure 3 As shown, the rotation direction of the tool 37 ( Figure 3 The left side of the fixed cover 36 (clockwise direction) is indicated by a hollow arrow 36a. A locking button 41a is provided on the upper part of the handle 41. By pressing the locking button 41a, the switch operation handle 42 can be turned on. This prevents the accidental start of the electric motor 40.

[0063] A battery mounting section 43 is provided on the main body base 35 behind the electric motor 40. A battery pack 44 is mounted on the battery mounting section 43. The power of the battery pack 44 mounted on the battery mounting section 43 is mainly used to supply power to the electric motor 40. The battery pack 44 is a hexahedral lithium-ion battery, and as shown in the figure... Figure 1The battery pack 44 is slidably attached downward with respect to the battery attachment portion 43 as indicated by a hollow arrow. The battery pack 44 is detachable from the battery attachment portion 43 by sliding the battery pack 44 upward. The battery pack 44 is repeatedly usable by detaching the battery pack 44 and charging it with a separately prepared charger. The battery pack 44 has versatility that can also be used as a power source for other electric power tools.

[0064] As shown in Figure 3 A carrying handle 45 is attached across between the battery attachment portion 43 and the rear portion of the fixed cover 36. When the cutting machine main body 10 is moved to the lower moving end, a grip portion 45a of the handle 45 is located at a substantially horizontal position. By fixing the cutting machine main body 10 at the lower moving position and gripping the grip portion 45a, the table cutting machine 1 can be easily carried.

[0065] As shown in Figures 1-3 A dust collection guide 46 and a hose connection port 47 are provided at the rear portion of the main body base 35. The dust collection guide 46 has a wall shape that is substantially C-shaped in plan view and stands up in the up-down direction with the front portion open, in a posture in which the cutting machine main body 10 is moved to the lower moving end position (cutting posture). The dust collection guide 46 suppresses scattering of cutting powder generated by cutting the workpiece W to the rear of the cutter 37 or to the left and right sides. The upper portion of the dust collection guide 46 communicates with the hose connection port 47. A dust collection hose (both not shown) of a dust collection bag or a dust collector is connected to the hose connection port 47. The cutting powder received by the dust collection guide 46 is efficiently collected into the dust collection box or the dust collector. Thereby, scattering of the cutting powder is suppressed, and a good working environment is maintained.

[0066] As shown in Figure 1 An adapter housing portion 48 is provided at the right side portion of the main body base 35. A communication adapter 48a for close-range wireless communication is attached to the adapter housing portion 48. The communication adapter 48a is housed inside the adapter housing portion 48 in a dustproof state. Wireless communication is performed between the table cutting machine 1 and other attached equipment such as a dust collector by the communication adapter 48a. For example, the dust collector is started and stopped in conjunction with the on-off operation of the switch operation handle 42. Thereby, efficient dust collection is possible, and the working efficiency is improved.

[0067] As described above, the cutting machine body 10 is arranged to be able to tilt left and right with respect to the table 3 (the workpiece W) by the tilt support portion 20. The left and right tilt positions of the cutting machine body 10 are fixed by the tilt fixing member 9 provided at the front of the table extension portion 3a. When the tilt fixing member 9 is rotated toward the unlocking side, the cutting machine body 10 is able to tilt left and right. The straight cutting position and the left and right 45° tilt positions of the cutting machine body 10 are positioned by the tilt positioning mechanism which is clamped between the tilt support portion 21 and the tilt portion 31 of the tilt member 30. The tilt positions positioned by the tilt positioning mechanism are able to be finely adjusted by the fine adjustment mechanism 50 described below.

[0068] The fine adjustment mechanism 50 is provided along the rear surface of the tilt support portion 20. The fine adjustment mechanism 50 has, in addition to the handle member 51 described above, an auxiliary member 55. As shown in Figs. 6 and 7, the handle member 51 is made by blanking a steel sheet into a substantially V-shaped form which is gently curved. The handle member 51 has the function of a lever having a fulcrum portion 51X, an action point portion 51Y, and a force receiving point portion 51Z. Figure 8 , Figure 9 As shown in Figs. 6 and 7, the handle member 51 is made by blanking a steel sheet into a substantially V-shaped form which is gently curved. The handle member 51 has the function of a lever having a fulcrum portion 51X, an action point portion 51Y, and a force receiving point portion 51Z.

[0069] As described above, the handle member 51 is coupled to the rear end of the intermediate lever 14 by the coupling screw 52. A circular support hole 51b is provided substantially in the center in the length direction of the handle member 51. The rear portion of the intermediate lever 14 is inserted into the support hole 51b in a manner so as to be able to rotate relatively. The coupling screw 52 is tightened at the rear portion of the intermediate lever 14, and the handle member 51 is coupled in a manner so as not to be able to be removed from the rear portion of the intermediate lever 14. The handle member 51 is supported by the intermediate lever 14 in a manner so as to be able to rotate along the rear surface of the tilt support portion 20. Therefore, the central axis of the intermediate lever 14 corresponds to the fulcrum portion 51X of the lever.

[0070] A work pin 53 is attached to the left end side of the handle member 51. The work pin 53 projects toward the front in the plate thickness direction. The work pin 53 is inserted into a long slot-shaped work groove 31c provided at the rear surface of the tilt portion 31. The work groove 31c extends along the radial direction with respect to the tilt axis J (the axis of the tilt shaft 22) passing through the tilt support portion 20. The work pin 53 is inserted into the work groove 31c in a manner so as to be able to relatively displace in the radial direction with respect to the tilt axis J. By displacing the work pin 53 in the circumferential direction with the fulcrum portion 51X as the center, the tilt member 30 is tilted about the tilt axis J. The work pin 53 corresponds to the action point portion 51Y of the lever.

[0071] As shown in Figs. 6 and 7, the handle member 51 is made by blanking a steel sheet into a substantially V-shaped form which is gently curved. The handle member 51 has the function of a lever having a fulcrum portion 51X, an action point portion 51Y, and a force receiving point portion 51Z. Figure 1 , Figure 2 , Figure 5As shown, the right end of the handle member 51 becomes an arm 51c for the user to grip and move up and down. The arm 51c protrudes significantly to the right from the rear surface of the tilting part 31. The arm 51c of the handle member 51 corresponds to the force-bearing point 51Z of the lever. When the user moves the force-bearing point 51Z up and down, the handle member 51 tilts (rotates) up and down about the fulcrum 51X. As the handle member 51 rotates about the fulcrum 51X, the action point 51Y (working pin 53) displaces about the fulcrum 51X. The working pin 53 moves relative to the working groove 31c along its length, and simultaneously applies force to the side wall of the working groove 31c, thereby causing the tilting member 30 to tilt left and right about the tilting axis J. The working groove 31c functions as a clearance groove, allowing the working pin 53 to move radially relative to the fulcrum 51X of the handle member 51 due to its eccentricity relative to the tilting axis J.

[0072] When the arm 51c of the handle component 51 is pushed downwards, the tilting component 30 tilts to the right. When the arm 51c of the handle component 51 is pushed upwards, the tilting component 30 tilts to the left. Thus, the rotation direction of the handle component 51 is consistent with the tilting direction of the cutting machine body 10. This allows for intuitive operation of the handle component 51, thereby improving the operability of the fine-tuning mechanism 50.

[0073] like Figure 9 As shown, the first line (distance L1) connecting the fulcrum portion 51X and the action point portion 51Y has an obtuse angle of approximately 120° with the second line (distance L2) connecting the fulcrum portion 51X and the force-bearing point portion 51Z. Accordingly, the handle member 51 has a shape that is bent into an approximately V-shape (mountain shape) with the fulcrum portion 51X as the center. The protrusion amount of the arm portion 51c from the tilting portion 31 is appropriately set such that the distance L1 between the fulcrum portion 51X and the force-bearing point portion 51Z is greater than the distance L2 between the fulcrum portion 51X and the action point portion 51Y. By setting the distance L1 > distance L2, the handle member 51 can function as a lever. Accordingly, the left and right tilt positions of the cutting machine body 10 can be finely adjusted with a smaller operating force.

[0074] An auxiliary component 55 is installed between the force-bearing point 51Z of the handle component 51 and the tilt-bearing portion 21. For example... Figure 10 , Figure 11 As shown, the auxiliary component 55 has an auxiliary fulcrum portion 55X, an auxiliary action point portion 55Y, and an auxiliary force receiving point portion 55Z. A support hole 55a is provided at the left end of the auxiliary component 55. Figure 5As shown, a support shaft portion 21b, which is provided in the tilting bearing portion 21, is inserted through the support hole 55a. The support shaft portion 21b is arranged parallel to the intermediate rod 14. The auxiliary member 55 is supported by the support shaft portion 21b in a manner that allows it to rotate up and down. The support shaft portion 21b inserted through the support hole 55a is equivalent to the auxiliary fulcrum portion 55X of the lever. Accordingly, the rotation axis of the auxiliary fulcrum portion 55X of the auxiliary member 55 is parallel to the rotation axis of the fulcrum portion 51X of the handle member 51.

[0075] A threaded hole 55b is provided to the right of the support hole 55a (auxiliary fulcrum portion 55X). A guide roller 56 is installed in the threaded hole 55b. The guide roller 56 is inserted into a guide groove 51d provided in the arm portion 51c (force-bearing point portion 51Z) of the handle member 51. The guide groove 51d is formed to a greater extent along the length of the arm portion 51c. The guide roller 56 corresponds to the auxiliary action point portion 55Y of the auxiliary member 55.

[0076] The arm 55c of the auxiliary member 55 is configured to protrude further to the right from the auxiliary action point 55Y. The arm 55c, with its tip portion primarily serving as the auxiliary force receiving point 55Z, acts as a lever. Similar to the handle member 51, the protrusion of the arm 55c is appropriately set such that the distance between the auxiliary fulcrum portion 55X and the auxiliary force receiving point 55Z is greater than the distance between the auxiliary fulcrum portion 55X and the auxiliary action point 55Y. Therefore, the auxiliary member 55 can function as a lever for operating the handle member 51 up and down.

[0077] When the auxiliary force-bearing point 55Z of the operating auxiliary component 55 is moved up and down, the auxiliary action point 55Y moves up and down around the auxiliary fulcrum 55X. The up and down movement of the auxiliary action point 55Y causes the force-bearing point 51Z of the handle component 51 to move up and down. By moving the force-bearing point 51Z of the handle component 51 up and down, the left and right tilt positions of the tilting component 30 can be finely adjusted.

[0078] Since the handle 51, which functions as a lever, moves up and down via the auxiliary component 55, which also functions as a lever, the user can operate the auxiliary force point 55Z of the auxiliary component 55 with less force to fine-tune the tilt position of the cutting machine body 10. The fine-tuning performed by the fine-tuning mechanism 50 and the tilt positioning mechanism (positive stop mechanism) are both performed while the tilt fixing component 9 is unlocked.

[0079] like Figure 12 , Figure 13As shown, in a state where the cutting machine main body 10 is inclined to the left by, for example, 30° by the inclination positioning mechanism, the fine adjustment mechanism 50 is operated. When the auxiliary force receiving point portion 55Z of the auxiliary member 55 is pushed upward as shown, the force receiving point portion 51Z of the handle member 51 is also displaced upward. Accordingly, the handle member 51 is rotated clockwise about the fulcrum point portion 51X as shown. As a result, the action point portion 51Y of the handle member 51 is displaced downward. By the displacement of the action point portion 51Y downward, the inclination member 30 is inclined in a direction in which the upper side thereof is displaced to the left. Accordingly, the cutting machine main body 10 is further inclined to the left from the 30° inclination position by several degrees, and the left inclination angle is finely adjusted in a direction in which it is larger than 30°. Conversely, when the auxiliary force receiving point portion 55Z of the auxiliary member 55 is pushed downward, the force receiving point portion 51Z of the handle member 51 is displaced downward, and the action point portion 51Y is displaced upward. Accordingly, the inclination member 30 is inclined in a direction in which the upper side thereof is displaced to the right, and the left inclination angle of the cutting machine main body 10 is finely adjusted in a direction in which it is smaller than 30°. After the fine adjustment, the inclination fixing member 9 is locked by the locking operation, and the fine-adjusted inclination position of the cutting machine main body 10 is locked.

[0080] As shown in FIG. 6, the inclination member 30 is provided with a pair of fulcrum point portions 31X and 31X, and a pair of action point portions 31Y and 31Y. The fulcrum point portions 31X and 31X are formed on the left and right sides of the inclination member 30, respectively, and the action point portions 31Y and 31Y are formed on the upper side of the inclination member 30. The fulcrum point portions 31X and 31X are connected to the fulcrum point portions 51X and 51X of the handle member 51, respectively, and the action point portions 31Y and 31Y are connected to the action point portions 51Y and 51Y of the handle member 51, respectively. Figure 14 , Figure 15 As shown, in a state where the cutting machine main body 10 is inclined to the right by, for example, 30° by the inclination positioning mechanism, the fine adjustment mechanism 50 is operated. When the auxiliary force receiving point portion 55Z of the auxiliary member 55 is pushed downward as shown, the force receiving point portion 51Z of the handle member 51 is also displaced downward. Accordingly, the handle member 51 is rotated counterclockwise about the fulcrum point portion 51X as shown. As a result, the action point portion 51Y of the handle member 51 is displaced upward. By the displacement of the action point portion 51Y upward, the inclination member 30 is inclined in a direction in which the upper side thereof is displaced to the right. Accordingly, the cutting machine main body 10 is further inclined to the right from the 30° inclination position by several degrees, and the right inclination angle is finely adjusted in a direction in which it is larger than 30°. Conversely, when the auxiliary force receiving point portion 55Z of the auxiliary member 55 is pushed upward, the force receiving point portion 51Z of the handle member 51 is displaced upward, and the action point portion 51Y is displaced downward. Accordingly, the inclination member 30 is inclined in a direction in which the upper side thereof is displaced to the left, and the right inclination angle of the cutting machine main body 10 is finely adjusted in a direction in which it is smaller than 30°. After the fine adjustment, the inclination fixing member 9 is locked by the locking operation, and the fine-adjusted inclination position of the cutting machine main body 10 is locked.

[0081] The fine adjustment mechanism 50 can be used independently of the tilt positioning mechanism, in addition to fine adjustment of the straight cut position or the 45° tilt position normally positioned by the tilt positioning mechanism. In a state in which the tilt fixing member 9 is unlocked, the cutting machine main body 10 can be used for fine adjustment of, for example, 10°, 20°, and the like, that is, fine adjustment of tilt angles that cannot be positioned by the tilt positioning mechanism as usual.

[0082] According to the table cutting machine 1 configured as above, by the fine adjustment mechanism 50 having the handle member 51 and the auxiliary member 55 each functioning as a lever, the tilt position of the cutting machine main body 10 can be fine adjusted with a smaller force. In positioning to the straight cut position or the 45° tilt position (normal positioning by the tilt positioning mechanism), and without using the fine adjustment mechanism 50, since the fine adjustment mechanism 50 does not generate a large resistance to movement, the operability of the tilt positioning mechanism is not impaired. In addition, in normal positioning by the tilt positioning mechanism, no special release operation as in the related art is required for the fine adjustment mechanism 50. Thus, the operability of the tilt positioning mechanism is improved, and the structure of the tilt support 20 is simplified.

[0083] In addition, in the embodiment, the handle member 51 has a fulcrum portion 51X in a central region in the length direction. The handle member 51 has an action point portion 51Y on the left end side in the length direction with respect to the fulcrum portion 51X, and a force receiving point portion 51Z on the right end side in the length direction. Accordingly, the handle member 51 functions as a lever, so that an operation force applied to the force receiving point portion 51Z is efficiently transmitted to the action point portion 51Y.

[0084] Further, an angle between a first line (distance L1) connecting the force receiving point portion 51Z and the fulcrum portion 51X and a second line (distance L2) connecting the action point portion 51Y and the fulcrum portion 51X is set to an obtuse angle (about 120°). Accordingly, the operation force applied to the force receiving point portion 51Z can also be efficiently transmitted to the action point portion 51Y.

[0085] The force receiving point portion 51Z of the handle member 51 is provided to an arm portion 51c protruding in the left-right direction in the side direction of the tilt member 30 with respect to the fulcrum portion 51X. Accordingly, the operation force required for operation of the force receiving point portion 51Z of the handle member 51 can be further reduced.

[0086] Further, according to the exemplified fine adjustment mechanism 50, there is an auxiliary member 55 having an auxiliary fulcrum portion 55X, an auxiliary action point portion 55Y, and an auxiliary force receiving point portion 55Z between the handle member 51 and the tilting support portion 21 that supports the tilting member 30 in a tiltable manner. The handle member 51 that functions as a lever is operated by the auxiliary member 55 that also functions as a lever, and this is used to tilt the tilting member 30. As a result, the user can operate the auxiliary member 55 with less force, and thus fine adjust the tilting position of the tilting member 30. Accordingly, the operability of the fine adjustment mechanism 50 can be further improved.

[0087] According to the exemplified fine adjustment mechanism, the tilting member 30 and the auxiliary member 55 are disposed on the front side of the handle member 51 in the direction of the tilting axis J of the tilting member 30. Accordingly, the handle member 51 and the auxiliary member 55 can be made compact in the direction of the tilting axis J with respect to the tilting member 30.

[0088] Further, the rotation axes of the fulcrum portion 51X (the intermediate lever 14) of the handle member 51 and the auxiliary fulcrum portion 55X (the fulcrum portion 21b) of the auxiliary member 55 are set to be parallel to each other. Accordingly, the operation direction of the auxiliary member 55 coincides with the tilting direction of the cutter main body 10, and thus the auxiliary member 55 can also be intuitively operated. Since both the handle member 51 and the auxiliary member 55 can be intuitively operated, the operability of the fine adjustment mechanism is further improved.

[0089] The fulcrum portion 51X of the handle member 51 is connected to the table (the tilting support portion 21) via the relief portion (the through-hole 31b) provided on the tilting member 30. Accordingly, the fulcrum portion 51X of the handle member 51 is disposed closer to the tilting axis J of the tilting member 30. Therefore, the lever principle can be more efficiently utilized.

[0090] The through-hole 31b as the relief portion is formed in the shape of an elongated hole along a circular arc having the tilting axis J of the tilting member 30 as a center axis. Therefore, the strength of the tilting member 30 does not substantially decrease when a certain region in the circumferential direction of the tilting member 30 is omitted as the relief portion.

[0091] Various modifications can be made to the above exemplified embodiments. For example, the auxiliary member 55 can be omitted. In this case, the left and right tilting positions of the cutter main body 10 can be fine adjusted by directly performing up and down displacement operations on the force receiving point portion 51Z of the handle member 51.

[0092] Although a structure in which the guide groove 51a is provided on the handle member 51 and the guide pin 23 is inserted through this is exemplified, these structures can be omitted.

[0093] Although a structure is exemplified in which the arm portion 51c of the handle member 51 is caused to protrude to the right from the tilting portion 31 and the auxiliary member 55 is arranged to the right of the tilting portion 31, a structure can also be adopted in which the arm portion is caused to protrude to the left and the auxiliary member 55 is arranged to the left of the tilting portion 31.

[0094] Although a structure is exemplified in which the fulcrum portion 51X is arranged in the center in the length direction of the handle member 51, the action point portion 51Y is arranged on the one end side with respect to the fulcrum portion 51X, and the force receiving point portion 51Z is arranged on the other end side, a structure can also be adopted in which the action point portion is arranged between the fulcrum portion and the force receiving point portion.

[0095] Although a structure is exemplified in which the auxiliary action point portion 55Y is arranged between the auxiliary fulcrum portion 55X and the auxiliary force receiving point portion 55Z with respect to the auxiliary fulcrum portion 55X, a structure can also be adopted in which the auxiliary action point portion is arranged on the one end side and the auxiliary force receiving point portion is arranged on the other end side, similarly to the handle member 51.

[0096] Although a structure is exemplified in which the fulcrum portion 51X of the handle member 51 is set at a position (axis of the intermediate lever 14) eccentric from the tilting center (tilting axis J) of the tilting member 30, the fulcrum portion of the handle member 51 can also be located on the tilting axis J.

[0097] As the table saw 1, a sliding circular saw in which the saw body 10 is capable of sliding forward and backward by the sliding support portion S is exemplified, but the fine adjustment mechanism 50 exemplified is also applicable to a table circular saw that does not have the sliding support portion S.

Claims

1. A bench cutting machine characterized by comprising a table, a cutting machine main body, a tilting member, a tilting fixing member, and a handle member, wherein the table is used for placing a cutting object; the cutting machine main body is moved up and down with respect to the table; the tilting member supports the cutting machine main body to the table in a manner that the cutting machine main body can be tilted left and right with respect to the table; the tilting fixing member fixes the tilting position of the cutting machine main body in a releasable manner; the handle member is operated when the tilting position of the cutting machine main body is adjusted by setting the tilting fixing member to a released state; the handle member has a fulcrum portion, an action point portion, and an arm portion, wherein the fulcrum portion is directly or indirectly connected to the table in a manner that the fulcrum portion can be rotated around an axis as a center; the action point portion is connected to the tilting member; the arm portion extends from the fulcrum portion, and has a force receiving point portion at a position farther than the distance between the fulcrum portion and the action point portion; and there is an auxiliary member between the handle member and a tilting receiving portion that supports the tilting member in a tiltable manner, the auxiliary member has an auxiliary fulcrum portion, an auxiliary action point portion, and an auxiliary force receiving point portion, one of the auxiliary fulcrum portion or the auxiliary action point portion is connected to the tilting receiving portion, and the other is connected to the handle member, and the distance between the auxiliary force receiving point portion and the auxiliary fulcrum portion is larger than the distance between the auxiliary action point portion and the auxiliary fulcrum portion.

2. The bench cutting machine according to claim 1, characterized in that the handle member has the fulcrum portion at the central region in the length direction, has the action point portion on the one end side in the length direction with respect to the fulcrum portion, and has the force receiving point portion on the other end side in the length direction.

3. The bench cutting machine according to claim 1 or 2, characterized in that the force receiving point portion protrudes to the side of the tilting member and to the left or right direction with respect to the fulcrum portion, and can be tilted up and down.

4. The bench cutting machine according to claim 1, characterized in that the auxiliary fulcrum portion is connected to the tilting receiving portion, and the auxiliary action point portion is connected to the force receiving point portion of the handle member.

5. The bench cutting machine according to claim 1 or 4, characterized in that the tilting member and the auxiliary member are disposed on the front side of the handle member in the direction of the tilting axis of the tilting member.

6. The bench cutting machine according to claim 1 or 4, characterized in that the fulcrum portion of the handle member and the auxiliary fulcrum portion of the auxiliary member have rotation axes that are parallel to each other.

7. The bench cutting machine according to claim 1 or 2, characterized in that the fulcrum portion of the handle member is connected to the table via a relief portion provided on the tilting member.

8. The bench cutting machine according to claim 7, characterized in that the relief portion is formed in the shape of an elongated slot hole along a circular arc having the tilting axis of the tilting member as a center axis.

9. A bench cutting machine characterized by ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A cutting machine having a table, a cutting machine main body, a tilting member, a tilting fixing member, and a handle member, wherein the table is used for placing a cutting object; the cutting machine main body moves up and down relative to the table; the tilting member supports the cutting machine main body to the table in a manner that the cutting machine main body can tilt left and right relative to the table; the tilting fixing member fixes the tilting position of the cutting machine main body in a releasable manner; the handle member is operated when adjusting the tilting position of the cutting machine main body by setting the tilting fixing member to a releasing state, the handle member has a fulcrum part, an action point part, and an arm part, wherein the fulcrum part is connected to the table in a manner that it can rotate around an axis; the action point part is connected to the tilting member; the arm part extends from the fulcrum part, an auxiliary member is provided between the handle member and a tilting receiving part that supports the tilting member in a tiltable manner, the auxiliary member has an auxiliary fulcrum part, an auxiliary action point part, and an auxiliary force receiving point part, one of the auxiliary fulcrum part or the auxiliary action point part is connected to the tilting receiving part, and the other is connected to the handle member, the distance between the auxiliary force receiving point part and the auxiliary fulcrum part is larger than the distance between the auxiliary action point part and the auxiliary fulcrum part.

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