Cutting devices

Abstract

Cutting device (1) comprising a base (2) adapted to contact an upper surface of a workpiece (W) to be cut, and a cutting device main body (10) mounted above an upper surface of the base (2), wherein the cutting device main body (10) has a circular rotating cutting blade (12) rotated by an electric motor (11) as a drive source, wherein the cutting device (1) performs a cutting operation in which a lower part of the rotating cutting element (12), projecting from a lower surface of the base (2), cuts into the material (W), wherein the main body of the cutting device (10) is mounted in such a way that it can pivot upwards and downwards with respect to the base (2), a cutting depth adjustment mechanism (40) is provided with which a cutting depth of the rotating cutting blade (12) in relation to the material (W) to be cut can be adjusted by changing a projection of the rotating cutting blade (12) from the side of the lower surface of the base (2), the cutting depth adjustment mechanism (40) includes a cutting depth stop mechanism (50) with which an end position of a movement of the cutting device main body (10) upwards can be adjusted in an upward and downward direction, the cutting depth adjustment mechanism (40) includes a depth guide (41) arranged on the upper surface of the base (2), wherein the depth guide (41) extends upwards from the upper surface of the base (2) between a cutting blade housing (13) for covering an upper part of the rotating cutting blade (12) and a handle (14) to be held by a user, the cutting depth of the rotating cutting blade (12) can be adjusted as desired by fixing the main body of the cutting device (10) to the depth guide (41), and the cutting depth stop mechanism (50) includes a stop lever (52) which is located on one side of the depth guide (41) opposite the cutting blade housing (13).

Description

[0001] The present invention relates generally to a hand-held cutting device, for example a cutting device referred to as a portable circular saw.

[0002] This type of cutting device consists of a base that rests (places) on the upper surface of the material to be cut, and a main body of the cutting device that is mounted on the upper side of the base. The main body of the cutting device contains a circular cutting blade (saw blade) that rotates using an electric motor as a drive source. A lower portion of the cutting blade protrudes from the lower surface of the base. Cutting (sawing) is performed by the lower portion of the cutting blade, which protrudes from the lower surface of the base, cutting (sawing) into the material to be cut.

[0003] The main body of the cutting device is mounted so that it can be tilted in a direction in which the upper part of the main body is shifted primarily to the right with respect to the cutting direction (the direction in which cutting (sawing) is performed). When the main body of the cutting device is held in a vertical cutting position, in which the main body of the cutting machine is not tilted with respect to the base, a vertical cut can be performed such that the cutting blade cuts into the material to be cut at a right angle. If the main body of the cutting device is tilted and the cutting blade cuts into the material to be cut at an angle, a so-called bevel cut is performed.A commonly used tilt angle of the cutting device main body, such as a 45° bevel cutting position or a 50° bevel cutting position, can be quickly and accurately positioned (set) by a stop mechanism (a positive stop mechanism). Prior art relating to the stop mechanism described above is disclosed, for example, in JP 2001 - 054 816 A, in JP 2001 - 232 515 A and in JP 2007 - 007 883 A.

[0004] Furthermore, this type of cutting device incorporates a cutting depth adjustment mechanism. This mechanism allows the main body of the cutting device to be tilted (pivoted) up and down relative to the base, thereby adjusting the cutting depth relative to the material being cut by increasing or decreasing the amount by which the cutting blade protrudes from a lower surface of the base. The cutting depth adjustment mechanism is configured in such a way that a front portion of the main body of the cutting device is mounted to tilt up and down relative to the base, and a guide element, referred to as the depth guide, is positioned between a rear portion of the main body of the cutting device and the base.By changing the position in which the main body of the cutting device is coupled to the depth guide, which is arranged so that it faces upwards on the upper surface of the base, the tilt position and / or depth position of the main body of the cutting device relative to the base can be changed, and the cutting depth can be adjusted. Prior art relating to the cutting depth adjustment mechanism described above is disclosed, for example, in JP 2006 - 001 148 A and in JP 2009 - 248 326 A.

[0005] Furthermore, DE 10 2011 086 337 A1 discloses a cutting depth limiting device and DE 20 2010 013 185 U discloses a circular saw.

[0006] As described above, the disclosures relate to the stop mechanism for bevel cuts and the cutting depth adjustment mechanism. Regarding the latter, the cutting depth adjustment mechanism, the main body of the cutting device is configured for easy positioning using a so-called detent mechanism, which provides a perceived click at predetermined cutting depth positions. However, a user must move the main body of the cutting device slowly up and down while visually verifying the desired cutting depth position. This is because, if the main body of the cutting device is moved quickly up and down, it will pass through the detent mechanism at the desired cutting depth position. In this respect, usability requires improvement.Therefore, there is a need to improve the operability of a cutting depth adjustment mechanism by quickly and easily positioning a target cutting depth position, in order to improve the operability and / or usability of the cutting device.

[0007] The present teachings relate generally to a cutting device that may include a base contacting an upper surface of a material to be cut, and a cutting device main body mounted above an upper surface of the base. The cutting device main body may include a circular rotating cutting blade driven by an electric motor, and the cutting device may perform a cutting (sawing) operation such that a lower portion of the rotating cutting blade, projecting from a lower surface of the base, cuts into the material to be cut. Furthermore, the cutting device main body may be mounted to pivot upwards and downwards relative to the base.A cutting depth adjustment mechanism may be provided, allowing the cutting depth of the rotating cutting blade to be adjusted (set) relative to the material being cut by changing the projection of the rotating cutting blade from the side of the lower surface of the base. The cutting depth adjustment mechanism may include a cutting depth stop mechanism, which allows the end position of an upward movement of the cutting device main body in an up-down direction to be adjusted.

[0008] The configuration described above allows the end position of the upward movement of the cutting device main body to be changed by the cutting depth stop mechanism. Accordingly, once the cutting depth is adjusted, a target cutting depth can be quickly achieved, thus improving reproducibility (repeatability) with respect to the cutting depth. As described above, fast and reliable positioning is difficult with a prior art cutting depth mechanism that uses a so-called detent mechanism. However, according to the configuration described above, movement of the cutting device main body to the end position of the upward movement is only necessary when adjusting a cutting depth, provided that the end position of the upward movement of the cutting device main body is appropriately defined by the cutting depth stop mechanism.This allows for quick and reliable positioning of the target cutting depth. In this respect, the ease of use of the cutting device and the cutting depth adjustment mechanism can be improved.

[0009] In one embodiment, the cutting depth adjustment mechanism may include a depth guide located on the upper surface of the base. The depth guide may extend upward from the upper surface of the base between a blade housing for covering the upper part of the rotating blade and a user-held handle. The cutting depth of the rotating blade can be set (adjusted) as desired by fixing the main body of the cutting device to the depth guide. Furthermore, the cutting depth stop mechanism may include a stop lever located on the side of the depth guide opposite the blade housing.

[0010] The configuration described above allows the stop lever of the cutting depth stop mechanism to be positioned between the depth guide and the cutting blade housing, and away from the handle in the base width direction, perpendicular to the cutting direction. Consequently, the stop lever does not interfere with handle operation, ensuring excellent usability of the cutting device.

[0011] In one embodiment, the cutting depth stop mechanism can include a stop component that can move along a guide groove in the depth guide. Furthermore, the stop component can be fixed by holding the depth guide from both sides in a thickness direction and by tightening it with the stop lever. Additionally, a variable-width element, in which the thickness of the depth guide changes, can be provided in the depth guide.

[0012] With the configuration described above, if the stop lever is locked relative to the outer circumferential edge of the depth guide, which is curved in an arc shape, a tip of the stop lever can be prevented from pointing upwards towards an upper side of the depth guide, since an angle of the stop lever relative to an outer circumferential edge of the depth guide is changed.

[0013] In one embodiment, the depth guide can include a regulating component for controlling an area in which the stop lever of the cutting depth stop mechanism can be actuated.

[0014] The configuration described above prevents the stop lever from being overtightened and / or over-loosened. Therefore, the operability of the cutting depth stop mechanism can be improved.

[0015] In one embodiment, the stop lever can include a main lever part and a secondary lever part.

[0016] The configuration described above allows a tilting operation to be performed with a fingertip placed on one or both of the main lever parts and the secondary lever parts. This can improve the usability of the stop lever.

[0017] Additional tasks, features and advantages of embodiments of the present teachings will be more easily understood after reading the following detailed description together with the claims and the accompanying drawings, in which: Fig. 1 a side view of a cutting device according to an embodiment, as seen from the right side of a user; Fig. 2 one in one direction of the arrow (II) in Fig. 1 Top view of the cutting device according to the embodiment is shown; Fig. 3 one in one direction of the arrow (III) in Fig. 1. Front view of the cutting device according to the embodiment is shown; Fig. 4 one in one direction of the arrow (IV) in Fig. 1 rear view of the cutting device according to the embodiment is; Fig. 5 one in one direction of the arrow (V) in Fig. Figure 4 shows a side view of the cutting device according to the embodiment, as seen from the left side of the user; Fig. 6 is a front view of the cutting device, showing that a base of the cutting device is partially cut out and a main body of the cutting device is positioned in a vertical cutting position; Fig. 7 is a front view of the cutting device, showing that a main body of the cutting device is inclined at 45° to a right side as seen by a user; Fig. 8 is a front view of the cutting device, showing that, as seen from a user, a main body of the cutting device is inclined at an angle such that an arctangent of the angle is 0.2; Fig. 9 is a front view of the cutting device, showing that, as seen from a user, a main body of the cutting device is inclined at an angle such that an arctangent of the angle is 0.3; Fig. 10 a front view of the cutting device which shows that, as seen from a user, a main body of the cutting device is inclined at an angle such that an arctangent of the angle is 0.4; Fig. 11 is a front view of the cutting device, showing that, as seen from a user, a main body of the cutting device is inclined at an angle such that an arctangent of the angle is 0.5; Fig. 12 a side view of a cutting depth adjustment mechanism along line (XII) - (XII) in Fig. Figure 2 shows a state in which the cutting depth adjustment mechanism is seen from one side of the back of a depth locking lever; Fig. 13 a side view of a cutting depth adjustment mechanism along line (XIII) - (XIII) in Fig. Figure 2 shows a state in which the cutting depth adjustment mechanism is viewed from one side of the front of a depth locking lever; and Fig. 14 is an exploded perspective view of a depth guide and a cutting depth stop mechanism.

[0018] The detailed description, which follows in conjunction with the accompanying drawings, is intended as a description of exemplary embodiments of the present teachings and is not meant to be limiting and / or to represent the only embodiments in which the present teachings can be implemented. The term "exemplary," used throughout this description, means "serving as an example, model, or illustration" and should not necessarily be interpreted as preferable or advantageous over other exemplary embodiments. The detailed description includes specific details to facilitate a better understanding of the exemplary embodiments of the present teachings. It is obvious to the person skilled in the art that the exemplary embodiments of the present teachings can also be implemented without these specific details.In some examples, well-known structures, components and / or devices are shown in block diagram form to avoid obscuring the novelty of the exemplary embodiments presented herein.

[0019] An embodiment of the present teachings is described below with reference to Fig. 1 to 14 described. As in Fig. As shown in Figures 1 to 5, a cutting device 1 according to the embodiment, which can also be described as a portable circular saw, can include a base 2 that contacts an upper surface of a material W to be cut, and a cutting device main body 10 that is mounted on an upper side of the base 2. A user can access the left side of the cutting device 1 in Fig. 1 be positioned, and the material W to be cut can be moved by moving the cutting device 1 towards the right side into Fig. 1 cut.

[0020] In the following description, the direction in which cutting (sawing) is performed is referred to as the front side, and the user's side is referred to as the rear side. Furthermore, the user is used as a reference point for the left and right directions of components and configurations of the cutting device 1. Additionally, in this embodiment, cutting (sawing) performed with a rotating cutting blade 12 perpendicular to the upper surface of the material W to be cut is referred to as a "vertical cut," and a position of the cutting device main body 10 relative to the base 2 is referred to as a "vertical cut position."Furthermore, a cutting (sawing) operation in which the upper part of the cutting device main body 10 is shifted to the right and a tip part of the rotating cutting blade 12 is shifted to the left with respect to the vertical cutting position is simply referred to as a "bevel cut", and a position of the cutting device main body with respect to the base is in this case referred to as a "bevel cut position" to which an angle of inclination is added for descriptive purposes. Fig. Figure 3 shows a state in which a vertical cut is performed with the cutting device main body 10 placed in the vertical cutting position. Fig. Figure 7 represents a state in which a bevel cut is performed with the cutting device main body 10 positioned at a 45° bevel cut angle. In the description of this embodiment, it is assumed that a bevel cut with the cutting device main body 10 is only performed inclined to the right.

[0021] Base 2 can be in the form of a rectangular flat plate. Base 2 can be placed on and touching a top surface of the material W to be cut. As shown in Fig. As shown in Figure 2, an angle guide 2a can be arranged on the front end part of the base 2.

[0022] As in Fig. 1 and Fig. As shown in Figure 2, ruler mounting holes 2b for mounting a guide ruler (a parallel guide) (not shown), which is used during a cutting operation, can be arranged on the right side of the base 2. The guide ruler mounting holes 2b can each be arranged at a front and a rear position of the base 2. Support arm parts of the guide ruler can each be inserted into the front and rear guide ruler mounting holes 2b, and then a main body of the ruler can be stored parallel to a right end edge of the base 2. As shown in Fig. As shown in Figure 5, ruler holding units 8 can be arranged on the rear surface of the upper surface of the base 2 corresponding to the front and rear ruler holding holes 2b. The ruler holding units 8 can hold the front and rear support arm sections, preventing them from slipping out of the ruler holding holes 2b. In this embodiment, a ball detent mechanism can be used in the ruler holding unit 8. A plurality of concave sections can be arranged longitudinally in the support arm section. If the ball of the ball detent mechanism is elastically fitted into the concave sections, the support arm section can be held, and consequently, the main ruler body can be held relative to the base 2.Furthermore, since the bearing arm of the straightedge is held by the ball detent mechanism, a click can be perceived when the position of the main ruler body is adjusted relative to the right end edge of base 2. In this respect, the ease of use of the straightedge can be improved.

[0023] The main body 10 of the cutting device can include an electric motor 11 as a drive source, a cutting blade housing 13 that covers almost the upper half of the circular rotating cutting blade 12, and a handle 14 held by the user. The electric motor 11 can be mounted on the rear of the cutting blade housing 13 (left side in Fig. 4) be mounted by means of a reduction gear 19. As in Fig. As shown in Figure 5, an outside air inlet 11a can be located in the rear of an engine housing (left side in Figure 5). Fig. 4) to introduce cooling air for the electric motor 11.

[0024] The handle 14 can be loop-shaped and extend from (between) an upper part of the electric motor 11 to a rear part of the cutting device 1. A power cable 15 can extend from the rear part of the handle 14. The electric motor 11 can be operated with 230 volts AC, supplied via the power cable 15. The power cable 15 can be suspended from a hook 14a located on the rear part of the handle 14. The power cable 15 can be protected if it is suspended from the hook 14a and coiled in a ring shape.

[0025] For example, in Fig. As shown in Figure 1, a push-button-like lever 14b can be arranged on the lower side of the handle 14. When the lever 14 is pulled (pushed) with a fingertip of the user while holding the handle 14, the electric motor 11 can be started and the rotating cutting blade 12 can be rotated. A light switch 14c can be arranged in a side part of the handle 14. When the light switch 14c is turned on, a light 3, located near the front end of the cutting blade housing 13, can be switched on. When the light 3 is switched on, a cutting area C, corresponding to the position where the lower surface of the base 2 intersects the upper surface of the material W to be cut and where the rotating cutting blade 12 cuts into the material W, can be illuminated.When the light 3 is switched on, the rotating cutting blade 12, which cuts into the material W to be cut, can be easily seen and / or observed (checked) during a cutting operation at night or in the dark. Accordingly, a cutting operation can be carried out quickly and accurately. As in . Fig. As shown in Figure 1, the light 3 can be positioned on the rear surface and / or on the left side (as seen by the user) relative to the rotating cutting blade 12 in a left-right direction, and can also be positioned offset from the front side of the tip of the rotating cutting blade 12 in a front-back direction. Accordingly, the cutting area C and the angular guide 2a can be sufficiently illuminated without the light from the light 3 being blocked by a cutting edge of the rotating cutting blade 12.

[0026] As in Fig. As shown in Figure 5, an outside air inlet 14d can be arranged in the vicinity of the base part at the rear of the handle 14 to introduce outside air. When the electric motor is started, outside air can flow into the motor housing from the outside air inlet 11a at the rear of the housing and the outside air inlet 14d at the base of the handle 14, thus cooling the electric motor 11. A control unit 9 for controlling the electric motor 11 can be housed in the housing in the vicinity of the base part at the rear of the handle 14. The control unit 9 can also be cooled by the motor cooling air flowing into the motor housing when the electric motor 11 is started.

[0027] A movable cover 16 can cover almost the lower half of the rotating cutting blade 12. The movable cover 16 can be mounted so that it is rotatable relative to the cutting blade housing 13. The movable cover 16 can be biased in a closing direction that rotates counterclockwise. Fig. 1 is. When the movable cover 16 is in the clockwise direction in Fig. When the movable cover 16 is turned against the spring preload force, it can be gradually opened and the rotating cutting blade 12 can be gradually revealed. Conversely, when the movable cover 16 is turned counterclockwise... Fig. As the rotating cutting blade 12 is turned, the movable cover 16 can be gradually closed, and accordingly, the rotating cutting blade 12 can be gradually covered by the movable cover 16. An opening and closing lever 16a for manual opening and closing of the movable cover 16 by the user can be arranged in the rear part of the movable cover 16. Furthermore, as shown in Fig. As shown in Figure 1, if the cutting device 1 is moved in the cutting direction while a tip end of the movable cover 16 touches an end surface of the material W to be cut, the movable cover 16 can be opened accordingly.

[0028] The main body of the cutting device 10 can be mounted such that it is tiltable mainly to the right with respect to the front-back direction (a cutting direction). A pair of angle plates, i.e., a front angle plate 20 and a rear angle plate 24, can be arranged on the upper surface of the base 2. A main body support bracket 21 can be mounted by the front angle plate 20, so that the main body support bracket 21 can pivot about a (front) main body tilting spindle 17 in the left-right direction (a width direction of the base 2) with respect to the front-back direction.Similarly, a main body support bracket 25 can be mounted by the rear angle plate 24 such that the main body support bracket 25 can pivot about a (rear) main body tilting spindle (main body tilting bolt) 18 in the left-right direction (the width direction of the base 2) with respect to the front-back direction. The front and rear main body tilting spindles 17 and 18 can be arranged coaxially with each other. The front and rear main body support brackets 21 and 25 can be connected to the front and rear end parts of the cutting blade housing 13, respectively, and the cutting device main body 10 can be mounted such that it can be tilted mainly to the right with respect to the front-back direction.

[0029] The front and rear angle plates 20 and 24 can include arcuate insertion slots 20a and 24a, respectively. Furthermore, wing screws 23 and 26 can be inserted into the front and rear insertion slots 20a and 24a, respectively. Additionally, wing screws 23 and 26 can be screwed into the main body support brackets 21 and 25, respectively. This design allows the pivot positions of the main body support brackets 21 and 25 to be fixed by tightening the front and rear wing screws 23 and 26. By fixing the pivot positions of the main body support brackets 21 and 25, the tilt position of the cutting device main body 10 can be fixed. Conversely, by loosening the front and rear wing screws 23 and 26, the cutting device main body 10 can be tilted primarily to the right about the main body tilting spindles 17 and 18.

[0030] The front main body support bracket 21 can be connected to the front end part of the blade housing 13 by means of an up-down tilt spindle 22. By changing the up-down tilt position of the cutting device main body 10 by means of the up-down tilt spindle 22, the projection of the rotating cutting blade 12 from the lower surface of the base 2 can be changed. By changing the projection of the rotating cutting blade 12 from the lower surface of the base 2, the cutting depth of the rotating cutting blade 12 can be adjusted (set) with respect to the material W to be cut. Details of a cutting depth adjustment mechanism 40 are described later.

[0031] A depth guide 41, which includes the cutting depth adjustment mechanism 40, can be mounted vertically (upwards and downwards) and pivotally by the rear main body support bracket 25. As described later, the depth guide 41 can be fixed to the rear of the cutting blade housing 13. The rear part of the cutting device main body 10 can be mounted on the upper surface of the base 2 by means of the depth guide 41, the main body support bracket 25, and the angle plate 24.

[0032] As in Fig. As shown in Figure 3, the vertical cutting position of the cutting device main body 10 can be accurately and quickly positioned by contacting a vertical positioning element 21c, which is located in the left end part of the main body support bracket 21, with a vertical positioning stop 6, which is arranged on the upper surface of the base 2. A screw can be used for the vertical positioning stop 6. By adjusting a tightening dimension of the vertical positioning stop 6, the vertical cutting position of the cutting device main body 10 can be precisely adjusted.

[0033] As in Fig. As shown in Figure 2, the vertical positioning stop 6 can be attached to a switching lever 7 for switching in the opposite direction of inclination, which is located on the upper surface of the base 2. The switching lever 7 can be actuated to pivot in the horizontal direction, so that the vertical positioning stop 6 pivots between a position below a vertical positioning part 21c and a position retracted to one side of the position below the vertical positioning part 21c. When the switching lever 7 is actuated so that it rotates in the horizontal direction and the vertical positioning stop 6 is positioned below the vertical positioning part 21c, the cutting device main body 10 can be positioned in the vertical cutting position as described above.On the other hand, if the shift lever 7 is actuated so that it rotates in the horizontal direction and the vertical positioning stop 6 retracts to one side from below the vertical positioning part 21c, the rear left part of the electric motor 11 can be tilted and / or reversed, for example by about 5° in a downward displacement direction and / or in a direction approaching the base 2.

[0034] As described above, the main body of the cutting device 10 can be tilted to the right from the vertical cutting position by loosening the wing screws 23 and 26. As shown in Fig. As shown in Figure 3, an angle scale (0°, 15°, 30° and 45°) indicating the inclination angle of the cutting device main body 10 can be marked on a side part of the front insertion groove 20a. Furthermore, an indicator 21a can be arranged on the main body support bracket 21. The inclination angle of the cutting device main body 10 can be confirmed (verified) by an angle value indicated by the indicator 21a.

[0035] As in Fig. As shown in Figure 3, the indicator 21 can point to a scale angle of 0° when the cutting device main body 10 is in the vertical cutting position, i.e., when the rotating cutting blade 12 is perpendicular to the upper surface of the material W to be cut. ... Fig. As shown in Figure 7, the indicator 21 can point to a scale angle of 45° when the cutting device main body 10 is in the 45° bevel cutting position, i.e., when the rotating cutting blade 12 is at an angle of 45° with respect to the upper surface of the material W to be cut.

[0036] As in Fig. As shown in Figure 7, a 45° positioning stop 4 can be arranged on the upper part of the base 2 so that the 45° bevel cutting position of the cutting device main body 10 can be positioned accurately. By contacting a first contact step part 21b of the main body support bracket 21 with the 45° positioning stop 4, the 45° bevel cutting position of the cutting device main body 10 can be positioned accurately and quickly. As shown in Fig. As shown in Figure 1, a "45" mark may be present on a side panel of the first contact stage part 21b. The 45° bevel cutting position of the cutting device main body 10 can be fixed by tightening the wing screw 23. The 45° bevel cutting position can be positioned such that contact stage parts 31a to 31d of an angle switch component 31, which will be described later, are retracted upwards in one direction.

[0037] With regard to tilt angles other than 45°, the user can fix the cutting device main body 10 at a desired tilt angle by tightening the wing screw 23 in a state where the cutting device main body 10 is tilted and moved to the desired tilt angle, while the user can determine (verify) the scale angle of the angle plate 20, on which the indicator 21a points. Furthermore, according to this embodiment, the cutting device 1 can include a tilt stop mechanism 30, which allows predetermined tilt angles, other than the vertical cutting position and the 45° bevel cutting position, to be positioned quickly and accurately. When using the tilt stop mechanism 30, the cutting device main body 10 can be positioned accurately and quickly at a desired tilt angle without observing the angle scale of the angle plate 12.

[0038] As in Fig. As shown in Figure 3, the tilt angle stop mechanism 30 according to this embodiment can include a tilt positioning stop 5 and a plate-shaped angle switching component 31. The angle switching component 31 can be supported by the front surface of the main body support bracket 21. The angle switching component 31 can be positioned away from the angle plate 20 and close to the rotating cutting blade 12 with respect to a width direction (a lateral direction) of the base 2. The angle switching component 31 can be arranged so that it is rotatable about a spindle 32. The spindle 32 can be arranged parallel to the main body tilt spindles 17 and 18 of the cutting device main body 10. Because of this design, the angle switching component 31 can be positioned so that it can be rotated about an axis that is parallel to the tilt axis of the cutting device main body 10.As shown in the drawings, the plate-shaped angle switching component 31 can be arranged such that it projects in the radial direction (base width direction) perpendicular to the front-back direction, with the thickness direction of the angle switching component 31 coinciding with the front-back direction. Furthermore, a rotating shaft (the spindle 32) of the angle switching component 31 can be arranged above the main body tilting spindle 17 with respect to a vertical direction and can be arranged closer to the side of the rotating cutting blade 2 than to the main body tilting spindle 17 with respect to a base width direction.

[0039] A plurality of stepped contact elements 31a to 31d can be arranged in a side part of the angle switch component 31. In this embodiment, a second contact element 31a, marked “2”, a third contact element 31b, marked “3”, a fourth contact element 31c, marked “4”, and a fifth contact element 31d, marked “5”, can be arranged successively in a stepped configuration. The second contact element 31a can correspond to an angle of inclination such that the arctangent of the angle is 0.2 (approximately 12°). The third contact element can correspond to an angle of inclination such that the arctangent of the angle is 0.3 (approximately 17°). The fourth contact stage part 31c can correspond to an angle of inclination such that an arctangent of the angle is 0.4 (approximately 22°).And the fifth contact stage part 31d can correspond to an angle of inclination, such that an arctangent of the angle is 0.5 (approximately 27°).

[0040] As in Fig. As shown in Figure 3, the tilt positioning stop 5 can be arranged at the base below the angle switch component 31. A screw can be used for the tilt positioning stop 5. By adjusting the tightening range of the tilt positioning stop 5, the tilt angles described above can be precisely adjusted.

[0041] The angle switch component 31 can be held in a retracted position, so that the angle switch component 31 is positioned far upwards in a direction relative to the tilt position stop 5, as shown in Fig. 6 shown, is withdrawn, or a second to a fifth position, in which each of the second to fifth contact step parts 31a to 31d is directed downwards and / or the tilt position stop, as shown in Fig. Figures 8 to 11 show contact. In this embodiment, a ball plunger (ball pressure piece) can be used so that the switching position of the angle switch component 31 can be held firmly. The switching position of the angle switch component can be held firmly by the elastic engagement of a ball of the ball plunger, which is provided in the main body bearing bracket 21, with a concave engagement part, which is provided in an opposite surface of the angle switch component 31.

[0042] Fig. Figure 8 represents a state in which the cutting device main body 10 is inclined such that the angle switch component 31 is switched to the second position, in which the second contact stage part 31a of the angle switch component 31 is directed towards and / or touches the tilt position stop 5. In this state, the tilt position stop 5 can be held in contact with the second contact stage part 31a. Accordingly, the cutting device main body 10 can be positioned such that an arctangent of an inclination angle of 0.2 (approximately 12°) is present. By tightening the wing screw 23 in this state, the cutting device main body 10 can be fixed at an inclination angle of approximately 12°.

[0043] Fig. Figure 9 represents a state in which the cutting device main body 10 is inclined such that the angle switch component 31 is switched to the third position, in which the third contact stage part 31b of the angle switch component 31 is directed towards and / or touches the tilt position stop 5. In this state, the tilt position stop 5 can be held in contact with the third contact stage part 31b. Accordingly, the cutting device main body 10 can be positioned such that an arctangent of an inclination angle of 0.3 (approximately 17°) is present. By tightening the wing screw 23 in this state, the cutting device main body 10 can be fixed at an inclination angle of approximately 17°.

[0044] Fig. Figure 10 represents a state in which the cutting device main body 10 is inclined such that the angle switch component 31 is switched to the fourth position, in which the fourth contact stage part 31c of the angle switch component 31 is directed towards and / or touches the tilt position stop 5. In this state, the tilt position stop 5 can be held in contact with the fourth contact stage part 31c. Accordingly, the cutting device main body 10 can be positioned such that an arctangent of an inclination angle of 0.4 (approximately 22°) is present. By tightening the wing screw 23 in this state, the cutting device main body 10 can be fixed at an inclination angle of approximately 22°.

[0045] Fig. Figure 11 represents a state in which the cutting device main body 10 is inclined such that the angle switch component 31 is switched to the fifth position, in which the fifth contact stage part 31d of the angle switch component 31 is directed towards and / or touches the tilt position stop 5. In this state, the tilt position stop 5 can be held in contact with the fifth contact stage part 31d. Accordingly, the cutting device main body 10 can be positioned such that an arctangent of an inclination angle of 0.5 (approximately 27°) is present. By tightening the wing screw 23 in this state, the cutting device main body 10 can be fixed at an inclination angle of approximately 27°.

[0046] As described above, by switching the angle switch component 31 to one of the second to fifth positions, the selected contact stage part 31a to 31d can be brought into contact with the tilt positioning stop 5, and the cutting device main body 10 can be positioned quickly and accurately so that an arctangent of a tilt angle is 0.2 (approximately 12°), 0.3 (approximately 17°), 0.4 (approximately 22°), or 0.5 (approximately 27°). Furthermore, each of the tilt angles can be precisely adjusted by adjusting a tightening dimension of the tilt positioning stop 5.

[0047] As described above, in the cutting device 1 according to this embodiment, the vertical cutting position of the cutting device main body 10 can be positioned by contacting the vertical positioning part 21c of the main body support bracket 21 with the vertical positioning stop 6. Furthermore, the 45° bevel cutting position of the cutting device main body 10 can be positioned by contacting the first contact step part 21b of the main body support bracket 21 with the 45° positioning stop 4. Additionally, the cutting device main body 10 can be positioned at tilt angles of 12°, 17°, 22°, or 27° by contacting one of the second to fifth contact step parts 31a to 31d of the angle switch component 31 with the tilt positioning stop 5.In this way, the main body 10 of the cutting device 1 according to this embodiment can be quickly and accurately positioned in the vertical cutting position, in the 45° bevel cutting position, or in the 12°, 17°, 22° or 27° bevel cutting positions by applying a so-called positive stop mechanism, in which positioning of a component can be carried out quickly and accurately by touching the component with another component.

[0048] The tilt stop mechanism 30 can be positioned remotely from the angle plate 20 and close to the rotating cutting blade 12. This design allows the user to easily perceive the marking on the angle switch component 31 more conveniently than by looking at the angle marking on the angle plate 20. Consequently, the tilt positioning of the cutting device main body 10 can be performed easily.

[0049] The cutting depth adjustment mechanism 40 is described below. In a top view, the cutting depth adjustment mechanism 40 can be arranged between the handle 14 and the cutting blade housing 13. As described above, the cutting depth adjustment mechanism 40 can have the depth guide 41, which extends in a circular arc shape. As shown in Fig. 13 and Fig. As shown in Figure 14, a cylindrical bearing attachment 41c can be arranged on the lower part of the depth guide 41. The depth guide 41 can be mounted such that it can tilt forwards and backwards with respect to the main body bearing bracket 25 on the rear side by means of a spindle 42 inserted into the bearing attachment 41c. The spindle 42 can be perpendicular to the main body tilting spindle 18.

[0050] The spindle 42 can be inserted into the bearing attachment part 41c of the depth guide 41, allowing the spindle 42 to move axially and rotate about its axis. Due to this design, the depth guide 41 can be supported by the main body bearing bracket 25 in such a way that a position of the depth guide in the axial direction of the spindle 42 (in a lateral direction of the base 2, which is a direction indicated by an unfilled arrow) is possible. Fig. (as shown in Figure 14) can be adjusted. By adjusting the position of the depth guide 41 in the base width direction with respect to the main body bearing bracket 25, the degree to which the rotating cutting blade 12 is parallel to the end face of the base 2 can be precisely adjusted. The position of the depth guide 41 in the base width direction can be fixed by tightening a screw (not shown) located in the lower surface of the bearing attachment part 41c and by pressing the spindle 42.

[0051] The depth guide 41 can be configured to extend in an arc shape upwards and obliquely forwards from the main body support bracket 25. The depth guide 41 can be essentially parallel to the rear (the left side in Fig. 4) of the cutting blade housing 13. A thickness and / or width dimension in the base width direction of the depth guide 41 can be configured to be non-constant. The depth guide 41 can be configured to have a tapered shape, such that the thickness of the depth guide 41 increases towards a lower end portion.

[0052] As in Fig. As shown in Figures 12 to 14, a guide groove 41a can be provided in the depth guide 41. The guide groove 41a can be arranged from the lower part to the upper part of the depth guide 41, that is, essentially along the entire length of the depth guide 41. The guide groove 41a can be configured to be curved in an arc shape in the same way as the depth guide 41. Furthermore, the guide groove 41a can extend through the depth guide 41 in the thickness direction of the depth guide 41. As shown in Fig. 13 and Fig. As shown in Figure 14, a wider stepped section 41b can be formed on the back side of the guide groove hole 41a.

[0053] A fixed shaft 44, extending from the rear (the left side in Fig. 4) of the cutting blade housing 13, can be inserted into the guide slot 41a of the depth guide 41. The fixed shaft 44 can be fixed to the rear of the blade housing 13 in such a way that the fixed shaft 44 cannot rotate or move axially. A screw shaft section can be provided on a tip section of the fixed shaft 44. A depth locking lever 43 can be attached to the tip section of the fixed shaft 44 by means of this screw shaft section. By tilting the depth locking lever 43 in a locking direction (a direction to the right when viewed from the rear), the depth guide 41 can be held firmly between the depth locking lever 43 and the cutting blade housing 13, and the cutting device main body 10 can be fixed with respect to the up-down tilting direction. In this way, the cutting depth of the rotating cutting blade 12 can be fixed.On the other hand, by tilting the depth locking lever 43 in a release direction (to the left when viewed from the rear), a holding dimension and / or a tightening dimension of the depth guide 41 between the depth locking lever 43 and the cutting blade housing 13 can be released, and the main body of the cutting device 10 can be tilted upwards and downwards about the up-down tilting spindle 22. In this way, the cutting depth of the rotating cutting blade 12 can be adjusted.

[0054] Fig. 12 and Fig. Figure 13 shows a state in which the cutting depth is at its maximum, such that the main body of the cutting device 10 is positioned at a movable lower end. In this state, the fixed shaft 44 can be moved in the vicinity of the lower end part of the guide groove 41a, as shown in Fig. The depth locking lever 43 is positioned as shown in Figure 13. When the depth locking lever 43 is tilted in the unlocking direction from this position and the cutting device main body 10 is tilted upwards about the up-down tilting spindle 22, the depth locking lever 43 and the fixed shaft 44 can be displaced integrally with the cutting device main body 10 in an upward direction along the guide slot 41a of the depth guide 41. The cutting depth of the rotating cutting blade 12 can be adjusted within the range in which the fixed shaft 44 can be displaced along the guide slot 41a.

[0055] In this embodiment, the position of a substantially upper end portion of the guide groove 41a (an upper end position within the area in which the fixed shaft 44 can be displaced) can be changed and / or adjusted by a cutting depth stop mechanism 50. The cutting depth stop mechanism 50 can be provided in the depth guide 41. As shown in Fig. As shown in Figure 14, the cutting depth stop mechanism 50 can include a stop component 51 and a stop lever 52 that secures the stop component 51 in position. Furthermore, the stop component 51 can include a sliding element 51a and a contact element 51b. The contact element 51b can be integrally formed with the sliding element 51a on the front surface of the sliding element 51a. The contact element 51b can project further rearward from the rear end of the sliding element 51a. A screw hole 51c can be provided on the front side of the sliding element 51a. The stop component 51 can be arranged such that the sliding element 51a can slide along the interior of the stepped section 41b. Furthermore, the stop component 51 can be supported by the guide groove 41a such that the contact element 51b can be positioned in the guide groove 41a.

[0056] The stop lever 52 can comprise a main lever part 52a and a secondary lever part 52b. The main lever part 52a and the secondary lever part 52b can extend in such a way that the two parts 52a and 52b are essentially configured in a V-shape and extend in opposite directions. The user can tilt the stop lever 52 by placing their fingertip on one or both of the main lever part 52a and the secondary lever part 52b. A locking screw 53 can be coupled to a coupling hole 52c of the stop lever 52, preventing the locking screw 53 from rotating relative to it. The locking screw 53 can be prevented from falling out of the stop lever 52 by a retaining ring 54. The locking screw 53 can be inserted from the front surface into the guide groove 41a of the depth guide 51 by means of a washer 55.The fixing screw 53 can be screwed into the screw hole 51c of the stop component 51.

[0057] When the stop lever 52 is tilted in the screw direction (towards a locking side), the fixing screw 53 can be tightened in the screw hole 51c, and the stop component 51 can be fixed in any position along the guide groove 41a. When the fixing screw 53 is tightened in the screw hole 51c, the guide groove 41a of the depth guide 41 can be held firmly by the sliding part 51a of the stop component 51 and the washer 55, i.e., from both sides, and the stop component 51 can be fixed in any position within the guide groove 41a. When the stop lever 52 is tilted in a screw loosening direction (towards an unlocking side), the fixing screw 53 in the screw hole 51c of the stop component 51 can be loosened to a certain extent, and the stop component 51 can be moved along the guide groove 41a.

[0058] The position of the contact part 51b can be adjusted by moving the stop component 51 along the guide groove 41a. The contact part 51b can have a key function of changing the upper end portion of the guide groove 41a. If the cutting device main body 10 is moved and / or tilted upwards to achieve a smaller cutting depth than the maximum cutting depth, the tilt position of the cutting device main body can be quickly and accurately restored in the upward and downward direction by fixing the contact part 51b in a constant position and by the contact part 51b making contact with the fixed shaft 44 of the depth-locking lever 43. Accordingly, a constant cutting depth can be quickly and accurately restored (reproduced).

[0059] As described above, the stop component 51 can have the essential function of changing the upper end part of the guide groove 41a. Thus, the cutting depth stop mechanism 50 can have the function of regulating a lower limit of the adjustable cutting depth. Furthermore, when the cutting depth is set to a maximum, as in Fig. As shown in Figure 13, by moving the stop component 51 into the lowest position and by touching the fixed shaft with the stop component 51, an unexpected upward displacement of the cutting device main body 10 can be prevented and the maximum cutting depth can be maintained even if the depth locking lever 43 is released by an error (erroneously).

[0060] As in Fig. As shown in Figure 14, a regulating edge section 45 can be provided on the lower surface of the depth guide 41. The regulating edge section 45 can be arranged below the main lever section 52 and the secondary lever section 52b such that it extends towards the front surface (to the right). Fig. 14) projects along a lower side of the guide groove 41a. The adjusting edge portion 45 can restrict the actuation of the stop lever 52 within a predetermined range. When the stop lever 52 is inclined towards the unlocking side, the secondary lever portion 52b can interfere with the adjusting edge portion 45, and tilting actuation of the stop lever 52 in the screw loosening direction can be restricted. Conversely, when the stop lever 52 is inclined towards the locking side, the primary lever portion 52a can interfere with the adjusting edge portion 45, and tilting actuation of the stop lever 52 in the screw tightening direction can be restricted. In this way, the adjusting edge portion 45 can prevent the stop lever 52 from being excessively tightened and loosened, and thus the position of the stop component 51 can only be changed by a necessary and sufficient angle by rapidly tilting (pivoting) the stop lever 52.Accordingly, the usability of the cutting depth stop mechanism 50 can be improved.

[0061] As described above, the thickness of the depth guide 51 (thickness d, as in Fig. (as shown in Figure 14) is modified (modified part) instead of remaining constant. In this embodiment, the thickness of the depth guide 51 increases towards the lower end part. Because of this design, by changing an angle (mainly) of the main lever part 51 of the stop lever 52 with respect to an outer circumferential edge of the depth guide 41, which has an arc shape, a tip of (mainly) the main lever part 52a cannot be directed upwards towards the side of the upper part of the depth guide 41.

[0062] Furthermore, the position and / or direction of (primarily) the main lever part 52, relative to the outer circumferential edge of the depth guide 41, can be changed on one side of the upper part and one side of the lower part of the depth guide 41 in an unlocked position in which the stop lever 52 is released. In this embodiment, since the thickness d on the lower side of the depth guide 41 is configured to be large (thicker), the direction of the main lever part 52a, in which the stop lever 52 is located on the lower side and inclined in the unlocked position, can be more oblique (a direction in which the main lever part 52 could be more released) than upward (directed), in the case where the direction of the main lever part 52, in which the stop lever 52a is located on the higher side and inclined in the locking position, is upward (directed).As a result, a direction and / or a relative position of the main lever part 52 in relation to the outer circumferential edge of the depth guide 41, which has a curved shape, can coincide with, for example, a radial direction of the depth guide 41, even if the main lever part 52a is positioned on the upper side or on the lower side.

[0063] Furthermore, the depth guide 41 can include the adjusting edge section 45. The adjusting edge section 45 can prevent the stop lever 52 from being released excessively, as the secondary lever section 52 interferes with the adjusting edge section 45. The relative position of the main lever section 52a and the secondary lever section 52b can be configured such that the main lever section 52a is positioned radially with respect to the outer circumferential edge of the depth guide 51 when the secondary lever section 52b contacts the adjusting edge section 45 from above. In this way, because the secondary lever section 52b interferes with the adjusting edge section 45, the release position of the stop lever 52 can be regulated, and accordingly, the main lever section 52a can be positioned radially with respect to the outer circumferential edge of the depth guide 41 at any given time.

[0064] Furthermore, as described above, the depth guide 41 can be configured to have a tapered shape, such that its thickness d increases towards a lower end portion. This design allows the release position of the stop lever 52 to be configured such that the main lever part 52a is positioned radially with respect to the outer circumferential edge of the depth guide 41, even if the main lever part 52a is located on the upper or lower side of the depth guide 41. Consequently, subsequent fingertip actuation to tilt the main lever part 52a into a locking position can be easily performed, even if the stop lever 52 is located on the upper or lower side of the depth guide 41. In this respect, the operability of the stop lever 52 can be improved.

[0065] Furthermore, as in Fig. 2 and Fig. As shown in Figure 14, a depth scale 41d, used to check (observe) a cutting depth of the rotating cutting blade 12 (a projection from the lower surface of the base 2), can be marked on the upper surface of the depth guide 41. The depth scale 41d can be marked "0", "15", "30", "45", and "60" in sequence from top to bottom, with a cutting depth interval of 15 mm. When the fixed shank 44 is positioned at "0", the projection of the rotating cutting blade 12 from the lower surface of the base can be configured to be 0 mm. When the fixed shank 44 is positioned at "60", the projection of the rotating cutting blade 12 from the lower surface of the base can be configured to be 60 mm, which indicates the maximum projection.

[0066] As in Fig.As shown in Figure 14, a reinforcing rib 41e can be provided on the lower surface of the depth guide 41 (an inner circumferential surface of the arc-shaped part). The reinforcing rib 41e can ensure the rigidity of the depth guide with respect to deflection. In this way, since the rigidity of the depth guide 41 with respect to deflection is improved, an actuating force for tilting the stop lever 52 can be efficiently transmitted to the stop lever 52. Accordingly, the operability of the stop lever 52 can be improved.

[0067] According to the cutting device 1 of this embodiment described above, the cutting device main body 10 can be moved upwards to a position at the upper end within the range where the cutting depth can be adjusted (a side where the cutting depth becomes small), which is changed by the cutting depth stop mechanism 50. Due to this design, by appropriately setting the cutting depth stop mechanism 50, once the cutting depth of the rotating cutting blade 12 has been adjusted, adjustment to a target cutting depth can be carried out quickly, and the recoverability with respect to the cutting depth can be improved.

[0068] As described above, with a cutting depth adjustment mechanism that uses a prior art detent mechanism, fast and reliable positioning can be difficult. On the other hand, with the cutting depth stop mechanism 50 according to the embodiment, by appropriately adjusting the position of the contact part 51 beforehand, the movement of the cutting device main body 10 to the end position of the upward movement is only required once when the cutting device main body 10 is moved up and down around the spindle 22. Thus, positioning of the target cutting depth can be carried out accurately and quickly. In this respect, the operability of both the cutting device 1 and the cutting depth adjustment mechanism 40 can be improved.

[0069] Furthermore, in the cutting depth stop mechanism 50 according to this embodiment, the stop lever 52 can be arranged between the depth guide 41 and the cutting blade housing 13, i.e., away from the handle 14 (on one side opposite the handle 14 with respect to the depth guide 41) in a position perpendicular to the cutting direction in the base width direction. Due to this design, the stop lever 52 cannot interfere with a holding action of the handle 14. Accordingly, a high degree of operability of the cutting device 1 can be achieved.

[0070] Furthermore, in the cutting depth stop mechanism 50 according to the embodiment, the stop component 51 is configured to be fixed by holding the depth guide 41 from both sides in the thickness direction and by tightening it with the stop lever 52. The thickness d of the depth guide 41 can also increase (thicken) towards the base (towards the side of the lower part). The depth guide 41 can also include the regulating edge part 45, which regulates an actuation range of the stop lever 52. Due to this design, the relative position of the main lever part 52a with respect to the outer circumferential edge of the depth guide in a release position of the stop lever 52 can essentially correspond to the radial direction, regardless of whether it is on the upper or lower side (relative position of the depth guide 51 in a longitudinal direction). This can improve the operability of the stop lever 52.

[0071] The present teachings are not limited to the embodiments described above and can be further modified without deviating from the scope of protection of the present teachings. For example, in the embodiments described above, the cutting device 1 has the power cable 15 and is operated with an AC power supply. However, the tilt stop mechanism 30 and the cutting depth stop mechanism 50 can also be used in a cutting device that uses a battery as a power source or is operated with a DC power supply.

[0072] Furthermore, with regard to the cutting depth stop mechanism 50, the stepped section 41b and / or the regulating edge part 45 can be omitted. Additionally, in this embodiment, the depth guide 41 can be configured to have a tapered shape, such that the thickness of the depth guide 41 increases towards a lower end section, thus aligning the release position of the stop lever 52 with the outer circumferential edge of the depth guide 41 with the radial direction on the side of the upper and lower sections. However, this configuration can also be omitted.

[0073] It is explicitly emphasized that all features disclosed in the description and / or the claims are to be considered separate and independent of one another for the purposes of the original disclosure as well as for the purpose of limiting the claimed invention, irrespective of the combinations of features in the embodiments and / or the claims. It is explicitly stated that all range specifications or specifications of groups of units disclose every possible intermediate value or subgroup of units for the purposes of the original disclosure as well as for the purpose of limiting the claimed invention, in particular also as a boundary of a range specification.

Claims

[1] Cutting device (1) comprising a base (2) adapted to contact an upper surface of a workpiece (W) to be cut, and a cutting device main body (10) mounted above an upper surface of the base (2), wherein the cutting device main body (10) comprises a circular rotating cutting blade (12) rotated by an electric motor (11) as a drive source, wherein the cutting device (1) performs a cutting operation in which a lower part of the rotating cutting element (12), projecting from a lower surface of the base (2), cuts into the material (W), wherein the main body of the cutting device (10) is mounted in such a way that it can pivot upwards and downwards with respect to the base (2), a cutting depth adjustment mechanism (40) is provided with which a cutting depth of the rotating cutting blade (12) in relation to the material (W) to be cut can be adjusted by changing a projection of the rotating cutting blade (12) from the side of the lower surface of the base (2), the cutting depth adjustment mechanism (40) includes a cutting depth stop mechanism (50) with which an end position of a movement of the cutting device main body (10) upwards can be adjusted in an upward and downward direction, the cutting depth adjustment mechanism (40) includes a depth guide (41) arranged on the upper surface of the base (2), wherein the depth guide (41) extends upwards from the upper surface of the base (2) between a cutting blade housing (13) for covering an upper part of the rotating cutting blade (12) and a handle (14) to be held by a user, the cutting depth of the rotating cutting blade (12) can be adjusted as desired by fixing the main body of the cutting device (10) to the depth guide (41), and the cutting depth stop mechanism (50) includes a stop lever (52) which is located on one side of the depth guide (41) opposite the cutting blade housing (13). [2] Cutting device (1) according to claim 1, wherein the cutting depth stop mechanism (50) includes a stop component (51) that can move along a guide groove (41a) of the depth guide (41), the stop component (51) can be fixed by holding the depth guide (41) from both sides in a thickness direction and by tightening it with the stop lever (52), and The depth guide (41) is provided with a modification section in which the thickness of the depth guide (41) changes. [3] Cutting device (1) according to claim 1 or 2, wherein the depth guide (41) includes a regulating edge part (45) for regulating an area in which the stop lever (52) of the cutting depth stop mechanism (50) can be actuated. [4] Cutting device (1) according to one of claims 1 to 3, wherein the stop lever (52) comprises a main lever part (52a) and a secondary lever part (52b).

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