Portable machining device

Abstract

To improve a plunge circular saw.SOLUTION: A portable machining device includes: a body portion; a cover having a cover body and an openable / closable door; an opening / closing mechanism for opening / closing the door; and a lock operation mechanism supported by one of the cover body and the body portion in a displaceable manner and capable of locking the opening / closing mechanism in a closed state. The body portion is displaceable with respect to the cover, between a first position in which a cutting tool is entirely accommodated in the cover and a second position in which the cutting tool is partially exposed outside the cover. The lock operation mechanism is displaceable by a manual operation between a blocking position in which opening of the door by the opening / closing mechanism is blocked and an allowing position in which opening of the door by the opening / closing mechanism is allowed. When the body portion is at the first position, displacement of the lock operation mechanism from the blocking position to the allowing position is allowed, and when the body portion is located at a position other than the first position, displacement of the lock operation mechanism from the blocking position to the allowing position is inhibited by contact between the other of the cover body and the body portion and a lock operation member.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a plunge-type portable processing machine.

Background Art

[0002] Various portable processing machines (for example, marquetry cutters, grooving cutters, routers, etc.) called plunge-type have been conventionally known. For example, a plunge marquetry cutter (hereinafter, also simply referred to as a marquetry cutter) includes a substantially rectangular base having a contact surface for contacting a workpiece to be cut, and a main body portion. The main body portion includes an electric motor and a cutting tool that is rotationally driven by the electric motor. The cutting tool is accommodated in a cover while being biased upward by a biasing member (the position of the cutting tool at this time is also referred to as the top dead center).

[0003] When using such a marquetry cutter, the user places the marquetry cutter at the cutting start position of the workpiece to be cut so that the contact surface of the base contacts the workpiece to be cut. Next, the user maximally displaces the cutting tool downward from the top dead center while the cutting tool is rotating (the position of the cutting tool at this time is also referred to as the bottom dead center). At this time, the lower part of the cutting tool protrudes below the base, and cutting of the workpiece to be cut is started. Next, the user moves the marquetry cutter forward to the cutting end position while maintaining the position of the cutting tool at the bottom dead center. Then, the user stops the rotation of the cutting tool and returns the cutting tool to the top dead center. Such a cutting method is called a plunge cut. [[ID=十七]]

[0004] In such a plunge marquetry cutter, an openable and closable cover may be adopted for replacement of the cutting tool. For example, Patent Document 1 below discloses a plunge marquetry cutter in which a side surface of the cover (a surface substantially orthogonal to the rotation axis of the cutting tool) can be opened in a hinge manner with the lowermost part of the cover as a fulcrum. ]

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, conventional plunge-type portable machining centers still have room for improvement. One example of such improvement is the ease of changing cutting tools. [Means for solving the problem]

[0007] This specification discloses a portable machining center. The portable machining center may include a main body having a motor configured to provide rotational driving force to a cutting tool; a cover for at least partially covering the cutting tool, having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; and a locking mechanism displaceably supported by either the cover body or the main body and configured to lock the opening / closing mechanism in a closed position. The main body may be configured to be displaceable relative to the cover between a first position in which the cutting tool is entirely housed within the cover and a second position in which the cutting tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position that prevents the opening / closing mechanism from opening the door and an allowing position that permits the opening / closing mechanism from opening the door. The portable processing machine may be configured such that when the main body is in a first position, displacement of the locking mechanism from the blocked position to the permissible position is permitted, and when the main body is in a position other than the first position, displacement of the locking mechanism from the blocked position to the permissible position is prohibited by contact between the cover body and the other part of the main body and the locking mechanism.

[0008] According to the above configuration, when the main body is in a position other than the first position, the displacement of the locking mechanism from the blocking position to the allowable position is prevented by the contact between the cover body and the other part of the main body and the locking mechanism. Therefore, damage to the portable processing machine when the user operates the locking mechanism to open the cover door can be prevented. Specifically, if the main body can be moved from a position other than the first position to the first position while the locking mechanism is displaced to the allowable position, there is a risk of damage due to a strong collision between the cover body and the other part of the main body and the locking mechanism. However, with the above configuration, such an event does not occur. Therefore, the user does not need to operate carefully to avoid damaging the portable processing machine by incorrect operation when opening the door. This improves user convenience.

[0009] This specification further discloses a portable machining center. This portable machining center may include a main body having a motor configured to provide rotational driving force to a cutting tool; a cover for at least partially covering the cutting tool, having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; and a locking mechanism displaceably supported by the cover body and one of the main body and configured to lock the opening / closing mechanism in a closed position. The main body may be configured to be displaceable relative to the cover between a first position in which the cutting tool is fully housed within the cover and a second position in which the cutting tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position that prevents the opening / closing mechanism from opening the door and an allowing position that permits the opening / closing mechanism from opening the door. A portable processing machine may be configured such that when the main body is in a first position, displacement of the locking mechanism from the blocked position to the permissible position is permitted; when the main body is in a position other than the first position, displacement of the locking mechanism from the blocked position to the permissible position is prohibited by contact between the cover body and the other part of the main body and the locking member; when the locking mechanism is in the blocked position, displacement of the main body from the first position to the second position is permitted; and when the locking mechanism is in the permissible position, displacement of the main body from the first position to the second position is prohibited by contact between the cover body and the other part of the main body and the locking member.

[0010] According to the above configuration, the locking mechanism has a closed-state locking function that prevents the door from opening when the main body is in a position other than the first position, and a main body position locking function that prohibits the displacement of the main body from the first position to the second position when the locking mechanism is in an allowable position. Therefore, compared to cases where each function is implemented by separate mechanisms, the portable processing machine can be made smaller. As a result, the handling of the portable processing machine is improved, and user convenience is enhanced.

[0011] This specification further discloses a portable machining center. This portable machining center may include a main body having a motor configured to provide rotational driving force to a cutting tool; a cover for at least partially covering the cutting tool, having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; and a locking mechanism displaceably supported by the cover body and one of the main body and configured to lock the opening / closing mechanism in a closed position. The main body may be configured to be displaceable relative to the cover between a first position in which the cutting tool is fully housed within the cover and a second position in which the cutting tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position that prevents the opening / closing mechanism from opening the door and an allowing position that permits the opening / closing mechanism from opening the door. The main body may include a battery mounting section configured to accommodate a battery that functions as a power source for the motor. The portable processing machine may be configured such that the locking operating member can only be displaced from the blocking position to the allowable position when the main body is in the first position and the battery is not installed in the battery mounting section.

[0012] According to the above configuration, the door can only be opened by operating the locking mechanism when the blade is completely housed within the cover and the motor is unable to rotate. Therefore, the user does not need to worry about the blade being unintentionally exposed from the cover or rotating when opening the door. This improves user convenience.

[0013] This specification further discloses a portable machining center. This portable machining center may include a main body having a motor having a motor shaft, an output shaft configured to output the rotational driving force of the motor shaft to a cutting tool, and a battery mounting section configured to accommodate a battery that functions as a power source for the motor. The portable machining center may further include a cover for at least partially covering the cutting tool, an engaging member configured to be displaceable between an engaging position that engages with the motor shaft or the output shaft to prevent rotation of the motor shaft and the output shaft when the motor is not driven, and an unengaged position that does not engage with either the motor shaft or the output shaft and allows rotation of the motor shaft and the output shaft, and an operating member that is pressed by the battery when the battery is mounted in the battery mounting section and displaced from an initial position to a pressed position. The main body may be configured to be displaceable relative to the cover between a first position in which the cutting tool is completely housed within the cover and a second position in which the cutting tool is partially exposed outside the cover. The engaging member and the operating member may be configured to interlock with each other such that the engaging member is in the engaged position when the operating member is in the initial position, and the engaging member is in the disengaged position when the operating member is in the pressed position.

[0014] With the above configuration, when the battery is removed, the engaging member engages with the motor shaft or output shaft, preventing the rotation of the motor shaft and output shaft. Therefore, by simply removing the battery, the rotation of the output shaft can be prevented when changing the cutting tool, making the cutting tool replacement work easier. This improves user convenience. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing an example of a circular saw according to the first embodiment, with the main body at the top dead center. [Figure 2] This is a perspective view of a circular saw, with the main body at the bottom dead center. [Figure 3] This is a perspective view of a circular saw, with the main body at top dead center. [Figure 4] It is a perspective view of the maruko, and the main body is at the bottom dead center. [Figure 5] It is a perspective view of the maruko, and the main body is at the top dead center. [Figure 6] It is a partially enlarged perspective view of the maruko with a part of the cover removed, and the lock operation member is in the blocking position. [Figure 7] It is a partially enlarged perspective view of the maruko with a part of the cover removed, and the lock operation member is in the allowing position. [Figure 8] It is a perspective view of the maruko with the door open. [Figure 9] It is a perspective view of the lock operation mechanism. [Figure 10] It is a perspective view of the maruko with some parts removed. [Figure 11] It is a cross-sectional view showing the positional relationship between the lock operation mechanism and the gear housing. The main body is at the top dead center, and the lock operation mechanism is in the blocking position. [Figure 12] It is a cross-sectional view showing the positional relationship between the lock operation mechanism and the gear housing. The main body is at the top dead center, and the lock operation mechanism is in the allowing position. [Figure 13] It is a cross-sectional view showing the positional relationship between the lock operation mechanism and the gear housing. The main body is at the bottom dead center, and the lock operation mechanism is in the blocking position. [Figure 14] It is a longitudinal sectional view of the maruko, and the lock operation mechanism is in the blocking position. [Figure 15] It is a longitudinal sectional view of the maruko, and the lock operation mechanism is in the allowing position. [Figure 16] It is a left side view of the maruko showing the state where the battery is not attached. [Figure 17] It is a left side view of the maruko showing the state where the battery is attached. [Figure 18] It is a longitudinal sectional view of the maruko, and the engaging member is in the engaged position. [Figure 19] It is a longitudinal sectional view of the maruko, and the engaging member is in the non-engaged position. [Figure 20] It is a longitudinal sectional view of the maruko. [Figure 21] This is a longitudinal cross-section of a circular saw showing the main body and cover in a non-tilted state. [Figure 22] This is a longitudinal cross-section of a circular saw showing the main body and cover tilted to their maximum angle. [Figure 23] This is a perspective view of the auxiliary cover when the main body and cover are not tilted. [Figure 24] This is a perspective view of the auxiliary cover when the main body and cover are tilted to their maximum angle. [Figure 25] This is a perspective view of the auxiliary cover when the main body and cover are not tilted. [Figure 26] This is a plan view of the base. [Figure 27] This is a cross-sectional view along line AA in Figure 26. [Figure 28] This is a schematic diagram showing the relationship between the inclination of the cover body and cover members and the amount of movement of the cover members. [Figure 29] This is a perspective view of the gear housing according to the second embodiment. [Figure 30] This is a cross-sectional view showing the positional relationship between the locking mechanism and the gear housing. The main body is at top dead center, and the locking mechanism is in the blocked position. [Figure 31] This is a cross-sectional view showing the positional relationship between the locking mechanism and the gear housing. The main body is at top dead center, and the locking mechanism is in the allowable position. [Figure 32] This is a cross-sectional view showing the positional relationship between the locking mechanism and the gear housing. The main body is at the bottom dead center, and the locking mechanism is in the blocked position. [Modes for carrying out the invention]

[0016] Representative and non-limiting examples of the present invention will be described in detail below with reference to the drawings. This detailed description is intended simply to show those skilled in the art details for carrying out preferred examples of the present invention and is not intended to limit the scope of the invention. In addition, the additional features and inventions disclosed below may be used separately from or in conjunction with the other features and inventions to provide further improved apparatus, methods for manufacturing and using the same.

[0017] Furthermore, the combinations of features and processes disclosed in the following detailed description are not essential for carrying out the present invention in the broadest sense, and are described solely to illustrate representative examples of the present invention. Moreover, the various features of the representative examples described above and below, as well as the various features described in the independent and dependent claims, do not necessarily have to be combined in the same way as the examples described herein or in the order listed, in order to provide additional and useful embodiments of the present invention.

[0018] All features described herein and / or in the claims are intended to be disclosed individually and independently of each other, as limitations to the original disclosure and claimed specifics, separate from the configurations of features described in the embodiments and / or in the claims. Furthermore, all descriptions relating to numerical ranges and groups or clusters are intended to disclose intermediate configurations therein, as limitations to the original disclosure and claimed specifics.

[0019] In one or more embodiments, the locking mechanism may include a contact portion projecting toward the other body portion of the cover and the cover body, and configured to be displaceable between a blocking position and an allowable position. The other body portion of the cover and the cover body may include a first contact portion that contacts the contact portion in a direction that prohibits the displacement of the contact portion from the blocking position to the allowable position when the body portion is in a position other than the first position, and a relief portion positioned adjacent to the first contact portion, which is a strip-shaped relief portion that is recessed further than the first contact portion in the direction of projection of the contact portion. When the body portion is in the first position, the contact portion may be positioned opposite the relief portion and may not contact the first contact portion in a direction that prohibits the displacement of the contact portion from the blocking position to the allowable position. With this configuration, when the main body is in a position other than the first position, the contact between the contact portion and the first contacted portion reliably prevents the door from opening via the locking mechanism, and when the main body is in the first position, the contact portion is positioned opposite the relief portion, thereby enabling the door to open.

[0020] In one or more embodiments, the locking mechanism may be supported by the cover body. With this configuration, both the opening / closing mechanism and the locking mechanism are supported by the cover body. Therefore, the opening / closing mechanism and the locking mechanism can be efficiently linked. In other words, the number of parts interposed between the opening / closing mechanism and the locking mechanism can be reduced or eliminated.

[0021] In one or more embodiments, the cover may be equipped with a hinge mechanism for opening and closing the door. When the side being machined by the cutting tool is defined as the front and the opposite side as the rear, the hinge mechanism may be positioned in front of or behind the axis of rotation of the cutting tool. The hinge mechanism may be oriented such that the rotational movement of the door by the hinge mechanism includes a horizontal component when the portable machine is in use. This configuration prevents the door from opening forcefully and wide against the user's intention due to its own weight, thus improving the convenience of opening and closing the door.

[0022] In one or more embodiments, the hinge mechanism may be oriented such that the rotational movement of the door by the hinge mechanism includes a vertical component when the portable processing machine is in use, and the opening movement of the door includes a vertically upward component. With this configuration, the operation to open the door involves rotation against the weight of the door, which further prevents the door from opening forcefully and wide against the user's intention.

[0023] In one or more embodiments, the hinge mechanism may be positioned in front of the rotation axis of the cutting tool. The opening / closing mechanism and the locking mechanism may be positioned behind the rotation axis of the cutting tool. When using this type of portable machine, the user is positioned behind the machine, so this configuration places the locking mechanism close to the user. This makes it easier for the user to operate the locking mechanism. Furthermore, the reduced distance between the opening / closing mechanism and the locking mechanism allows them to be linked in a compact configuration. Additionally, the increased distance between the opening / closing mechanism and the hinge mechanism enables more reliable opening and closing of the door.

[0024] In one or more embodiments, the main body may be configured to pivot relative to the cover between a first position and a second position about a pivot axis. The contact portion and the first contact portion may be positioned closer to the pivot axis than to the rotation axis of the cutting tool. This configuration reduces the distance between the contact portion and the first contact portion and the pivot axis, thereby reducing the circumferential range in which the first contact portion must be positioned to function properly over the entire pivot angle range of the main body. In other words, the first contact portion can be miniaturized.

[0025] In one or more embodiments, the first contact portion may be formed in an arc shape. The cover body and the other body portion may have a recess that is recessed more than the first contact portion, and is formed adjacent to and along the first contact portion. When the body portion is displaced between the first position and the second position with the contact portion in the blocked position, the body portion and the contact portion may move relative to each other while the contact portion faces the recess. With this configuration, when the contact portion (in other words, the locking mechanism) is in the blocked position, interference between the cover body and the other body portion and the contact portion is reliably avoided by the recess. Therefore, the body portion can be reliably swung between the first position and the second position.

[0026] In one or more embodiments, the cover body and the other body portion may have a second contact portion formed in a strip shape along the relief portion, the second contact portion contacting the contact portion in a direction that prohibits displacement of the body portion from a first position to a second position when the contact portion is in an allowable position. With this configuration, the locking mechanism has a closed-state locking function that prevents the door from opening when the body portion is in a position other than the first position, and a body portion position locking function that prohibits displacement of the body portion from a first position to a second position when the locking mechanism is in an allowable position. Therefore, the portable processing machine can be made smaller compared to when each function is realized by separate mechanisms. As a result, the handling of the portable processing machine is improved, and user convenience is enhanced.

[0027] In one or more embodiments, the opening / closing mechanism may include an engaging portion configured to be displaceable between a closed position in which it engages with the door and holds the door closed, and an open position in which it does not engage with the door and allows the door to be opened. The engaging portion may be operably connected to a locking mechanism such that the engaging portion is in the closed position when the locking mechanism is in the blocking position, and the engaging portion is in the open position when the locking mechanism is in the allowing position. This configuration allows the opening / closing mechanism and the locking mechanism to be properly interlocked with a simple configuration.

[0028] In one or more embodiments, the opening and closing mechanism may include a biasing member and a locking member biased by the biasing member in the opening direction of the door and positioned to be displaceable in the opening and closing direction of the door. The locking member may be configured such that, when the door is closed, it is pressed against the door against the biasing force and is positioned not to interfere with the displacement of the engaging portion from the closed position to the open position, and when the door is open, it is pressed against the biasing force of the biasing member and is positioned not to interfere with the displacement of the engaging portion from the open position to the closed position. With this configuration, when the door is open, the displacement of the engaging portion from the open position to the closed position (in other words, the displacement of the locking operating member from the permissible position to the blocking position) is prevented unless the locking member is manually pressed to a position not to interfere with the displacement of the engaging portion from the closed position to the open position. In other words, with the door open, the locking operating member cannot be returned from the permissible position to the blocking position and the portable machining tool cannot be used. Therefore, the user does not need to take care to prevent the cutting tool from rotating unintentionally when the door is open. This improves user convenience.

[0029] In one or more embodiments, the main body may include a battery mounting section configured to allow a battery, which functions as a power source for the motor, to be slidably mounted. The locking mechanism may be configured to be displaceable such that, when the locking mechanism is in the permissible position, it interferes with the sliding trajectory of the battery when the battery is mounted in the battery mounting section, and when the locking mechanism is in the blocking position, it does not interfere with the sliding trajectory. With this configuration, when the locking mechanism is in the permissible position, the battery cannot be mounted in the battery mounting section (and consequently, the blade cannot be rotated). Therefore, the user does not need to take care to prevent the blade from rotating unintentionally when the door is open.

[0030] In one or more embodiments, the locking mechanism may have the form of a pivotable operating lever. This configuration provides stable operation and improved user convenience.

[0031] In one or more embodiments, the locking mechanism may include an operating lever pivotable about a first pivot axis, and a locking lever that is pressed at least temporarily by the operating lever as the operating lever pivots, and engages at least temporarily with the operating lever, thereby pivotable about a second pivot axis different from the first pivot axis, and which contacts the cover body and the other body to prevent the locking mechanism from being disengaged from a blocked position to an allowable position when the body is in a position other than the first position. This configuration increases the design freedom of the locking mechanism and improves operability.

[0032] In one or more embodiments, the main body may include a battery mounting section configured to allow the insertion of a battery that functions as a power source for the motor. The portable machining center may be configured such that the locking operating member can only be displaced from the blocking position to the allowing position when the main body is in a first position and the battery is not installed in the battery mounting section. With this configuration, the user cannot open the door unless the cutting tool is fully housed within the cover and the battery is not installed in the battery mounting section. Therefore, the user does not need to worry about the cutting tool being unintentionally exposed from the cover or rotating when opening the door.

[0033] Embodiments of the present invention will be described in more detail below with reference to the drawings.

[0034] The first embodiment of the present invention will be described below. In this embodiment, a plunge circular saw 10 (hereinafter simply referred to as the circular saw 10) will be used as an example of a portable processing machine. For the convenience of explanation, in the following description, when a user holds the circular saw 10 in their hand and cuts a material to be cut, the side on which the circular saw 10 moves (the direction in which the cutting is advanced) will be defined as the front side of the circular saw 10, and the opposite side will be defined as the rear side of the circular saw 10. In this case, the side located vertically upward will be defined as the upper side of the circular saw 10, and the opposite side will be defined as the lower side of the circular saw 10. Furthermore, the direction perpendicular to the front-back and up-down directions will be defined as the left-right direction of the circular saw 10. In the left-right direction, the right side when viewed from the rear to the front will be defined as the right side of the circular saw 10, and the opposite side will be defined as the left side of the circular saw 10.

[0035] First, the approximate configuration of the circular saw 10 will be described, mainly with reference to Figures 1 to 5. As shown in Figures 1 to 5, the circular saw 10 comprises a base 20 for contacting the upper surface of the material to be cut, a main body 30, and a cover 50. The base 20 has a roughly rectangular outer shape. The longitudinal direction of the base 20 is the front-to-back direction. The base 20 has a lower surface 21 for contacting the upper surface of the material to be cut when cutting the material. However, the base 20 is not necessarily positioned so that the lower surface 21 contacts the upper surface of the material to be cut. When a long ruler is used with the circular saw 10 to cut the material in a straight line, the base 20 may be positioned so that the lower surface 21 contacts the upper surface of the long ruler.

[0036] The main body 30 is basically positioned above the base 20. The main body 30 includes a motor housing 31 that houses the electric motor 33 (see Figure 21) and a grip portion 32 for the user to hold by hand. The electric motor 33 includes a motor shaft 34. The electric motor 33 (motor shaft 34) provides rotational driving force to the saw blade 35 (see Figures 2 and 4) via a reduction gear 43 (see Figure 21) and an output shaft 42 (see Figure 21) housed in a gear housing 60 (see Figure 3). The saw blade 35 uses a circular saw blade called a carbide-tipped saw blade. In this embodiment, the gear housing 60 is integrally formed with the motor housing 31.

[0037] The cover 50 is positioned above the base 20 and on the right edge of the base 20. The cover 50 is fixed to the base 20 via an angular contact 26 and angular contact plates 24, 25 (details described later). The saw blade 35 has a disc shape and is at least partially housed inside the cover 50. Specifically, an arc-shaped through hole 37 (see Figure 3) is formed on the left side of the cover 50, penetrating the left side in the left-right direction. The output shaft 42 extends through this through hole 37 into the interior of the cover 50. Inside the cover 50, the saw blade 35 is attached to the tip of the output shaft 42 by a flange 36 (see Figure 8). As a result, when the electric motor 33 is driven by power supplied from the battery 45 (see Figures 3 and 4) which is mounted in the battery mounting section 46 (see Figure 16), the saw blade 35 rotates integrally with the output shaft 42 around the rotation axis AX1 (see Figure 6). A trigger 38 (see Figure 4) for starting and stopping the electric motor 33 is provided at the front end of the grip portion 32.

[0038] As shown in Figure 16, the battery mounting section 46 is located at the rear and lower part of the main body 30. The battery mounting section 46 allows the battery 45 to be mounted in a sliding manner. Specifically, the battery mounting section 46 is equipped with a plurality of terminals 47 that extend in a rail-like manner. When the battery 45 is slid into the battery mounting section 46 in the direction in which the plurality of terminals 47 extend, the plurality of terminals 47 and the plurality of terminals (not shown) of the battery 45 are electrically connected.

[0039] Such a main body 30 is configured to pivot relative to the base 20 and cover 50 around a pivot shaft 22 (see Figure 3) supported by the base 20 (a trunnion 27 integrally molded with an angular contact 26 supported by the base 20). The pivot shaft 22 (in other words, the pivot axis AX2 of the main body 30) is parallel to the rotation axis AX1. Specifically, the main body 30 is displaceable between a position where the entire saw blade 35 is located above the lower surface 21 of the base 20 and the saw blade 35 is entirely housed within the cover 50 (also referred to as the top dead center), as shown in Figures 1 and 3, and a position where the saw blade 35 protrudes downward beyond the lower surface 21 of the base 20 and the saw blade 35 is partially exposed outside the cover 50 (also referred to as the bottom dead center when the saw blade 35 protrudes the most from the lower surface 21), as shown in Figures 2 and 4. Furthermore, the statement that the saw blade 35 is "entirely" housed within the cover 50 means that, when viewed in the direction in which the rotation axis AX1 extends, the entire saw blade 35 is not located outside the outer casing of the cover 50.

[0040] A torsion spring 23 is positioned around the support shaft 22. The torsion spring 23 constantly biases the main body 30 from the bottom dead center side towards the top dead center side. Therefore, the top dead center becomes the initial position of the main body 30.

[0041] The top dead center position is defined by a lock pin 39 (see Figure 3) extending from the gear housing 60 toward the cover 50, and a recess 51 (see Figure 4) formed on the left side of the cover 50 (more specifically, the cover body 52, which will be described later). Specifically, the lock pin 39 is constantly biased toward the right (i.e., toward the cover 50) by a biasing member (not shown), and when the lock pin 39 is in a position facing the recess 51, the tip of the lock pin 39 fits into the recess 51. As a result, the cover 50 is locked at the top dead center. When the user operates the release button 40 (see Figure 4), the lock pin 39 retracts to the left against the biasing force of the biasing member. This releases the engagement between the lock pin 39 and the recess 51. In this state, when the user pushes the main body 30 downward, the main body 30 is displaced toward the bottom dead center against the biasing force of the torsion spring 23.

[0042] The position of the lower moving end of the main body 30 (the lower limit of movement) is defined by the stopper 41 (see Figures 3 and 4). The user can push down the main body 30 until the gear housing 60 contacts the stopper 41. The stopper 41 is configured to be able to change its vertical position. Therefore, the user can change the position of the stopper 41 (i.e., the position of the lower moving end) according to the desired cutting depth. The bottom dead center mentioned above is the position of the main body 30 when the main body 30 is lowered to the lower moving end with the stopper 41 in its lowest position. In the following description, the lower moving end will also be referred to as the bottom dead center, assuming that the stopper 41 is in its lowest position. When the main body 30 is at the lower moving end, and the user releases the downward force pushing down on the main body 30, the main body 30 returns to the top dead center due to the biasing force of the torsion spring 23.

[0043] Furthermore, the main body 30 and the cover 50 are configured to be tiltable relative to the base 20. Specifically, angular plates 24 and 25 are mounted on the base 20. The angular plates 24 and 25 each have an arc shape of approximately one-quarter of a circle centered on the first tilt axis AX6 (see Figure 22). Angular plate 24 is fixed to the front edge of the base 20, and angular plate 25 is fixed to the rear edge of the base 20. The front and rear parts of the angular plate 26 have an arc shape substantially identical to that of the angular plates 24 and 25, and are positioned to overlap with the angular plates 24 and 25, respectively. The portion between the front and rear parts of the angular plate 26 has a substantially flat shape that extends in the front-rear and left-right directions, with the front-rear direction being the longitudinal direction (see Figure 3). As is well known, loosening the thumb screws 28 and 29 attached to the angular plates 24 and 25 releases the fixing relationship between the angular 26 fixed to the cover 50 and the angular plates 24 and 25, allowing the main body 30 and cover 50 to be tilted relative to the base 20. Then, tightening the thumb screws 28 and 29 at the desired tilt position establishes the fixing relationship between the angular 26 fixed to the cover 50 and the angular plates 24 and 25, fixing the tilt position of the main body 30 and cover 50 relative to the base 20. An angle switching knob 58 is provided on the front of the angular plate 24. By rotating the angle switching knob 58, the limit angle when the main body 30 and cover 50 are tilted can be switched to 22.5 degrees, 45 degrees, or 60 degrees. Even if the main body 30 and the cover 50 are tilted relative to the base 20, the main body 30 can be displaced between the top dead center and the bottom dead center in the same manner as described above.

[0044] Next, the configuration for replacing the saw blade 35 of the circular saw 10 will be described. As shown in Figures 1 and 8, the cover 50 comprises a cover body 52 and an openable door 53. The door 53 functions as part of the right side of the cover 50. When the body 30 is at top dead center, the door 53 is large enough to cover the entire upper portion and approximately half of the lower portion of the saw blade 35. Therefore, as shown in Figure 8, when the door 53 is opened, the flange 36 for fixing the saw blade 35 to the output shaft 42 by sandwiching the saw blade 35 in the left-right direction is fully exposed. Thus, the saw blade 35 can be easily replaced by loosening the flange 36 using a box wrench or the like.

[0045] As shown in Figure 8, the door 53 can be opened and closed by a hinge mechanism 54, which is composed of a part of the cover body 52 and a part of the door 53. In this embodiment, the hinge mechanism 54 is positioned in front of the rotation axis AX1 of the saw blade 35. Furthermore, the hinge mechanism 54 is oriented so that the pivot axis of the door 53 intersects the horizontal direction (a direction perpendicular to the vertical direction) and the vertical direction. Therefore, the rotational movement of the door 53 includes a horizontal component. By including a horizontal component in the rotational movement of the door 53, it is possible to suppress the door 53 from opening forcefully and widely against the user's intention due to its own weight. Moreover, the hinge mechanism 54 is oriented so that the rotational movement of the door 53 includes a vertical component, and the opening movement of the door 53 includes an upward component. Therefore, the user's operation to open the door 53 involves rotation against the weight of the door 53. Thus, it is possible to further suppress the door 53 from opening forcefully and widely against the user's intention. This effect can be obtained even if the hinge mechanism 54 is positioned behind the rotation axis AX1.

[0046] Furthermore, the circular saw 10 includes an opening and closing mechanism 70 for opening and closing the door 53, and a locking operation mechanism 80 that can lock the opening and closing mechanism 70 in a closed state (i.e., with the door 53 closed). The opening and closing mechanism 70 and the locking operation mechanism 80 will be described below. As shown in Figures 6 and 7, the opening and closing mechanism 70 includes an engaging portion 71 for holding the door 53 in a closed state. The engaging portion 71 is pivotally supported on the left side of the cover body 52. ​​The engaging portion 71 is displaceable between a closed position (see Figure 6) in which it engages with the door 53 and holds the door 53 in a closed state, and an open position (see Figure 7) in which it does not engage with the door 53 and allows the door 53 to be opened.

[0047] The engaging portion 71 includes a first engaging piece 72 and a second engaging piece 73 that project radially outward with respect to its pivot axis AX3. As shown in Figures 14 and 15, the door 53 has an engaging portion 55 that projects in an L-shape from its inner surface (left side) to the left (towards the saw blade 35). When the engaging portion 71 is in the closed position (see Figure 6), as shown in Figure 14, the first engaging piece 72 of the engaging portion 71 and the tip of the engaging portion 55 of the door 53 (the part extending vertically) engage in the left-right direction. As a result, the door 53 cannot move in the opening direction (to the right) and is held in the closed position. On the other hand, when the engaging portion 71 is in the open position (see Figure 7), as shown in Figure 15, the first engaging piece 72 of the engaging portion 71 and the engaging portion 55 of the door 53 do not engage in the left-right direction. As a result, the door 53 can be opened.

[0048] Such an engaging portion 71 is configured to work in conjunction with a locking mechanism 80. As shown in Figure 9, the locking mechanism 80 comprises an operating portion 81, a base portion 82, a connecting portion 83, an arm portion 84, and a contact portion 85. The base portion 82 has a substantially cylindrical shape. The operating portion 81 is the part for manual operation by the user and is in the form of a substantially L-shaped lever. The operating portion 81 extends radially outward from the base portion 82, then bends and extends to the left. The connecting portion 83 is the part for connecting with the engaging portion 71 and extends cylindrically to the right from the base portion 82. As shown in Figures 14 and 15, the connecting portion 83 is connected to the engaging portion 71 by a screw 74. Since the connecting portion 83 is positioned to pass through a through hole in the cover body 52, the engaging portion 71 and the locking mechanism 80 are supported in an integrated state in the cover body 52 so as to be pivotable about the pivot axis AX3. The arm portion 84 extends radially outward from the base portion 82 at a circumferential position different from that of the operating portion 81. At the tip of the arm portion 84, a contact portion 85 is formed that protrudes cylindrically toward the left side (towards the gear housing 60 of the main body portion 30).

[0049] Such a locking mechanism 80 is configured to be displaceable by manual operation between a blocking position (see Figures 5 and 6) that prevents the opening of the door 53 by the opening / closing mechanism 70, and a permitting position (see Figure 7) that allows the opening of the door 53 by the opening / closing mechanism 70. Specifically, as described above, the locking mechanism 80 is configured to pivot integrally with the engaging portion 71. When the locking mechanism 80 is in the blocking position, the engaging portion 71 is in the closed position, and when the locking mechanism 80 is in the permitting position, the engaging portion 71 is in the open position. Therefore, the user can only open the door 53 by displacing the locking mechanism 80 from its initial blocking position to the permitting position.

[0050] As shown in Figure 6, when the main body 30 is at top dead center and the locking mechanism 80 is in the blocking position, the locking mechanism 80 (more specifically, the operating part 81) is located below the sliding trajectory for sliding the battery 45 into the battery mounting section 46. Therefore, the battery 45 can be mounted in the battery mounting section 46 without interfering with the sliding trajectory. On the other hand, as shown in Figure 7, when the main body 30 is at top dead center and the locking mechanism 80 is in the allowable position, the locking mechanism 80 (more specifically, the operating part 81) interferes with the sliding trajectory of the battery 45. Therefore, the battery 45 cannot be mounted in the battery mounting section 46. In other words, when the locking mechanism 80 is in the allowable position where the door 53 can be opened, power is not supplied to the electric motor 33. Therefore, the user does not need to take care to prevent the saw blade 35 from rotating unintentionally when the door 53 is open.

[0051] As shown in Figure 5, when the locking mechanism 80 is in the blocked position, and the battery 45 is installed in the battery mounting section 46, the tip of the operating section 81 of the locking mechanism 80 is located below the battery 45. Therefore, even if the user tries to operate the locking mechanism 80 from the blocked position (see Figure 5) to the permitted position (see Figure 7), the operating section 81 interferes with the battery 45. For this reason, when the battery 45 is installed in the battery mounting section 46, the user cannot displace the locking mechanism 80 from the blocked position to the permitted position. On the other hand, as is clear from Figures 6 and 7, when the battery 45 is removed, the locking mechanism 80 can be displaced from the blocked position to the permitted position without interfering with other components. In other words, unless the electric motor 33 is not supplied with power and the circular saw 10 is unusable, the user cannot operate the locking mechanism 80 to open the door 53. Therefore, the user does not need to be careful to prevent the saw blade 35 from rotating unintentionally when opening and closing the door 53.

[0052] Furthermore, the locking mechanism 80 is configured such that displacement from the blocked position to the permitted position is permitted only when the main body 30 is at top dead center, and displacement from the blocked position to the permitted position is prohibited when the main body 30 is at any position other than top dead center. Such a configuration will be described below with reference to Figures 10 to 13. As shown in Figure 10, the right surface of the gear housing 60 has a first contact portion 61, a relief portion 62, a recess 63, and a second contact portion 64 formed thereon.

[0053] The relief portion 62 and the recess 63 are grooves that are recessed toward the left. The relief portion 62 and the recess 63 are continuous with each other and together have a roughly V-shape (more precisely, a V-shape formed by an arc). The first contact portion 61 is an arc-shaped portion adjacent to the recess 63 and forms the side wall of the recess 63 (the side wall on the side closer to the relief portion 62) along the recess 63. The second contact portion 64 is an arc-shaped portion adjacent to the relief portion 62 and forms the side wall of the relief portion 62 (the side wall on the side closer to the recess 63) along the relief portion 62. The relief portion 62 and the recess 63 are located further back to the left than the first contact portion 61 and the second contact portion 64.

[0054] The contact portion 85 of the locking mechanism 80 (which protrudes in the direction of the recess of the relief portion 62 and recess 63) is housed within the relief portion 62 and recess 63. In other words, the contact portion 85 is always positioned opposite either the relief portion 62 or the recess 63 in the left-right direction. The position of the contact portion 85 within the relief portion 62 and recess 63 changes depending on the swing position of the main body portion 30 and the pivot position of the locking mechanism 80.

[0055] Specifically, as shown in Figure 11, when the main body 30 is at top dead center and the locking mechanism 80 is in the blocked position (in other words, when the opening / closing mechanism 70 is in the closed position), the contact portion 85 is in a position opposite the base end of the relief portion 62 (the connection point with the recess 63). In this state, displacement of the locking mechanism 80 (in other words, the contact portion 85) from the blocked position to the permitted position is permitted. Specifically, when the user displaces the locking mechanism 80 from the blocked position shown in Figure 11 to the permitted position shown in Figure 12, the contact portion 85 moves from a position opposite the base end of the relief portion 62 to a position opposite the tip of the relief portion 62 (the end opposite the connection point with the recess 63), as shown in Figure 12. Although the relief portion 62 is adjacent to the first contacted portion 61, it is in a position that is retracted from the first contacted portion 61, so the movement of this contact portion 85 is not hindered by contact with the first contacted portion 61.

[0056] In the state shown in Figure 12, that is, when the main body 30 is at the top dead center and the locking mechanism 80 is in the allowable position, displacement of the main body 30 from the top dead center to the bottom dead center is prohibited. Specifically, in the state shown in Figure 12, even if the user tries to displace the main body 30 toward the bottom dead center, the second contact portion 64 will come into contact with the contact portion 85 in a direction that prohibits such displacement. Therefore, the user cannot displace the main body 30 toward the bottom dead center.

[0057] On the other hand, in the state shown in Figure 11, that is, when the main body 30 is at the top dead center and the locking mechanism 80 is in the blocked position, displacement of the main body 30 from the top dead center to the bottom dead center is permitted. Specifically, in the state shown in Figure 11, when the user displaces the main body 30 to the bottom dead center, the contact portion 85 moves relative to the tip of the recess 63 (the end opposite to the connection point with the relief portion 62), as shown in Figure 13.

[0058] In the state shown in Figure 13, that is, when the main body 30 is in a position other than the top dead center and the locking mechanism 80 is in the blocked position, displacement of the locking mechanism 80 (in other words, the contact portion 85) from the blocked position to the permitted position is prohibited. Specifically, in the state shown in Figure 13, even if the user attempts to displace the locking mechanism 80 from the blocked position to the permitted position, the contact portion 85 will contact the first contacted portion 61 in a direction that prohibits such displacement. Therefore, the user cannot displace the locking mechanism 80 toward the permitted position.

[0059] As is clear from the above explanation, with the circular saw 10, the locking mechanism 80 can be displaced from its initial blocking position to an allowable position in order to open the door 53 only when the main body 30 is at top dead center. Therefore, when the main body 30 is moved from a position other than top dead center to top dead center with the locking mechanism 80 displaced to the allowable position, the gear housing 60 and the locking mechanism 80 do not collide forcefully, preventing damage. Consequently, the user does not need to operate the circular saw 10 carefully to avoid damaging it by incorrect operation when opening the door 53. Thus, user convenience is improved.

[0060] Furthermore, with the circular saw 10, the main body 30 can be displaced from the top dead center to the bottom dead center in order to perform cutting with the circular saw 10, but only when the locking mechanism 80 is in the blocking position (in other words, only when there is no possibility of the door 53 opening). Therefore, the user can use the circular saw 10 without having to check whether the door 53 is open (or whether the door 53 is in a state where it can be opened). Thus, user convenience is improved.

[0061] Furthermore, the locking mechanism 80 can implement both a closed-state locking function that prevents the door 53 from opening when the main body 30 is in a position other than the top dead center, and a main body position locking function that prohibits the displacement of the main body 30 from the top dead center to the bottom dead center when the locking mechanism 80 is in an allowable position. As a result, the circular saw 10 can be made smaller compared to when these two functions are implemented by separate mechanisms.

[0062] Furthermore, since both the engaging portion 71 of the opening / closing mechanism 70 and the locking mechanism 80 are supported by the cover body 52, the engaging portion 71 and the locking mechanism 80 can be efficiently linked with a small number of parts.

[0063] Furthermore, as shown in Figure 6, the engaging portion 71 and the locking mechanism 80 are positioned behind the rotation axis AX1 of the saw blade 35, that is, closer to the user's standing position when using the circular saw 10. This makes it easier for the user to operate the locking mechanism 80. Moreover, because the distance between the engaging portion 71 and the locking mechanism 80 is small, the engaging portion 71 and the locking mechanism 80 can be linked in a compact configuration. Furthermore, the hinge mechanism 54 for opening and closing the door 53 is positioned in front of the rotation axis AX1 of the saw blade 35 (that is, further away from the engaging portion 71 and the locking mechanism 80). This increases the distance between the engaging portion 71 and the hinge mechanism 54, enabling more reliable opening and closing of the door 53.

[0064] Furthermore, as shown in Figure 11, the contact portion 85 and the first contacted portion 61 are positioned closer to the oscillation axis AX2 of the main body 30 than to the rotation axis AX1 of the saw blade 35. In other words, the distance between the oscillation axis AX2 and the contact portion 85 and the first contacted portion 61 is smaller than the distance between the rotation axis AX1 and the contact portion 85 and the first contacted portion 61. As a result, the distance between the contact portion 85 and the first contacted portion 61 and the oscillation axis AX2 becomes smaller. Therefore, the circumferential range relative to the oscillation axis AX2 in which the first contacted portion 61 should be positioned in order to function properly over the entire oscillation angle range of the main body 30 can be reduced. In other words, the first contacted portion 61 can be made smaller.

[0065] The circular saw 10 also has an additional configuration to prevent the use of the circular saw 10 when the door 53 is open. Such a configuration is described below. As shown in Figures 14 and 15, the opening and closing mechanism 70 includes a compression spring 75 and a locking member 76. As shown in Figures 6 and 7, the locking member 76 is positioned below the engaging portion 71 and adjacent to the engaging portion 71. Note that in Figure 6, a portion of the cover body 52 (the right portion located on the rear edge) is shown removed, but in reality, as shown in Figure 8, this portion is attached, and from the right side of the cover body 52, only the locking member 76 can be accessed via the through hole 56, and the engaging portion 71 cannot be accessed.

[0066] As shown in Figures 14 and 15, the locking member 76 comprises an engaging portion 77 protruding upward and a pressed portion 78 that protrudes cylindrically to the right. A step 79 is formed at the base end of the pressed portion 78. The locking member 76 is constantly biased to the right (in other words, in the opening direction of the door 53) by a compression spring 75 that is compressed and positioned between the left portion of the cover body 52 and the locking member 76.

[0067] As shown in Figure 14, when the door 53 is closed with the projection 57 provided on the door 53 entering the interior of the cover 50 through the through hole 56 (when the door 53 is held closed by the engagement of the engaging portion 71 and the engaging portion 55), the projection 57 presses the pressed portion 78 to the left against the biasing force of the compression spring 75. In this state, as shown in Figures 6 and 14, the engaging portion 77 is retracted to the left of the engaging portion 71 and does not interfere with the operation of the engaging portion 71. Therefore, the engaging portion 71 can be displaced from the closed position (see Figure 6) to the open position (see Figure 7) in conjunction with the locking mechanism 80.

[0068] On the other hand, when the engaging portion 71 is displaced from the closed position (see Figure 6) to the open position (see Figure 7), the holding of the door 53 in the closed state (in other words, the pressing force of the projection 57) is released. At this time, the locking member 76 is pressed to the right by the biasing force of the compression spring 75 and displaced to the right until the step 79 contacts the right inner surface of the cover body 52. ​​At this time, the locking member 76 (more specifically the pressed portion 78) presses the door 53 to the right, so the door 53 opens by the amount of the displacement of the locking member 76, as shown in Figure 15. Also, as shown in Figures 7 and 15, as the locking member 76 is displaced, the engaging portion 77 takes the same left-right position as the engaging portion 71. At this time, as is clear from Figure 7, the engaging portion 77 interferes with the displacement of the engaging portion 71 from the open position (see Figure 7) to the closed position (see Figure 6). In other words, when the door 53 is even slightly open, the engaging portion 71 cannot be displaced from the open position (see Figure 7) to the closed position (see Figure 6).

[0069] With this configuration, in principle, when the door 53 is open, the user cannot move the locking mechanism 80, which is linked to the engaging part 71, from the permitted position to the blocking position. If the locking mechanism 80 is not in the blocking position, the main body 30 cannot be moved from the top dead center to the bottom dead center. Therefore, when the door 53 is open, the user does not need to pay attention to the saw blade 35 being unintentionally exposed from the cover 50, improving user convenience.

[0070] However, if the user inserts their finger into the through-hole 56 and pushes the pressed portion 78 to the left with their finger, the locking member 76 will be displaced to the position shown in Figure 14, and it will be possible to displace the main body 30 from the top dead center to the bottom dead center while maintaining that state. With this configuration, with the battery 45 removed, the saw blade 35 can be displaced towards the bottom dead center, and cutting debris and other debris present between the left side of the cover body 52 and the saw blade 35 can be easily cleaned.

[0071] Furthermore, with the above configuration, when the engaging portion 71 is displaced by the operation of the locking mechanism 80, the door 53 is automatically opened slightly by the biasing force of the compression spring 75. As a result, a small gap is created between the door 53 and the right outer surface of the cover body 52, as shown in Figure 15. The user can easily open the door 53 by inserting their finger into this gap.

[0072] The circular saw 10 is further equipped with a configuration for facilitating the replacement of the saw blade 35. Such a configuration is described below with reference to Figures 16-20. The circular saw 10 is equipped with an operating member 90 and an engaging member 94. As shown in Figure 20, the operating member 90 is equipped with a knob 91, a shaft 92 and a pressing part 93. The knob 91 is positioned to be exposed on the outside of the battery mounting section 46. The pressing part 93 is positioned inside the gear housing 60. The shaft 92 rotatably passes through the motor housing 31 and connects the knob 91 and the pressing part 93.

[0073] As shown in Figures 16 and 17, the knob 91 has an arc shape. When the battery 45 is not installed in the battery mounting section 46, the operating member 90 is in the initial position shown in Figure 16. When the battery 45 is installed in the battery mounting section 46, it is pressed by the battery 45 and pivots to the pressed position shown in Figure 17. At this time, the shaft 92 and the pressing part 93, which are integrated with the knob 91, also pivot together with the knob 91.

[0074] The engaging member 94 is located inside the gear housing 60. As shown in Figures 18 and 19, the engaging member 94 has an annular portion 95 at one end in its longitudinal direction and a pressed portion 97 at the other end. The annular portion 95 is positioned so that the motor shaft 34 passes through a through hole formed inside the annular portion 95. The pressed portion 97 is a portion that protrudes to the left. On the other end of the annular portion 95, an engaging portion 96 is formed, which has a through hole that is significantly narrower in width than the through hole of the annular portion 95. Such an engaging member 94 is held by a pin 99 so as to be displaceable in its longitudinal direction between an engaged position shown in Figure 18 and an unengaged position shown in Figure 19. The engaging member 94 is constantly biased by a compression spring 98, which is positioned in a compressed state between the gear housing 60 and the pressed portion 97, so that the pressed portion 97 moves toward the motor shaft 34 (in other words, toward the engaged position).

[0075] When the battery 45 is not installed in the battery mounting section 46, the engaging member 94 is in the engaged position shown in Figure 18. At this time, the motor shaft 34 is fitted inside the engaging section 96, and the motor shaft 34 and the engaging section 96 are engaged. Therefore, at least when the electric motor 33 is not driven, the rotation of the motor shaft 34 is prevented. At this time, the shaft 92 is in contact with the pressed section 97, but is not pressing the pressed section 97.

[0076] On the other hand, when the battery 45 is installed in the battery mounting section 46, the operating member 90 pivots as described above. As a result, as shown in Figure 19, the pressing section 93 presses the pressed section 97 against the biasing force of the compression spring 98. Consequently, the engaging member 94 is displaced from the engaged position shown in Figure 18 to the disengaged position shown in Figure 19. This releases the engagement between the motor shaft 34 and the engaging section 96, allowing the motor shaft 34 to rotate. Therefore, with the battery 45 installed, the engaging member 94 does not affect the rotation of the motor shaft 34. When the battery 45 is removed, the biasing force of the compression spring 98 returns the pressing section 93 (operating member 90) and the engaging member 94 to the positions shown in Figure 18.

[0077] With the above configuration, the rotation of the motor shaft 34 is prevented simply by removing the battery 45. Therefore, when loosening and tightening the flange 36 using a box wrench or the like to replace the saw blade 35, the motor shaft 34 is prevented from rotating along with it. Thus, the replacement of the saw blade 35 can be easily performed, improving user convenience.

[0078] Furthermore, the circular saw 10 is equipped with a configuration that allows the saw blade 35 to be tilted at a larger angle than conventional plunge circular saws. Such a configuration will be described below, mainly with reference to Figures 21 to 24. As shown in Figures 1 and 2, the cover 50 is equipped with an auxiliary cover 500 that functions as part of the right-side portion of the cover 50. The auxiliary cover 500 is positioned to function as part of the portion of the cover 50 that is close to the base 20 (in other words, as part of the lower edge of the right-side portion of the cover 50). As will be described in more detail later, the auxiliary cover 500 is configured to be movable relative to the cover body 52.

[0079] As described above, the main body 30 and the cover body 52 can be tilted relative to the base 20 by loosening the thumb screws 28 and 29 provided on the angular plates 24 and 25. This tilting motion is performed around a first tilting axis AX6 (see Figure 22). As shown in Figure 22, the first tilting axis AX6 is located below the base 20. Multiple arc-shaped protrusions and recesses are formed on the rear surface of the angular plate 24 and the front surface of the front arc portion of the angular plate 26, and these protrusions and recesses interlock to guide the tilting motion. The centers of the arc-shaped protrusions and recesses coincide with the first tilting axis AX6. The same applies to the front surface of the angular plate 25 and the rear surface of the rear arc portion of the angular plate 26.

[0080] As shown in Figure 23, the auxiliary cover 500 includes a cover member 510 for covering the sides of the saw blade 35 and a support member 520 for supporting the cover member 510. The cover member 510 includes a first portion 511, a second portion 512, a third portion 513, and contact portions 514 and 515. The first portion 511 has a substantially rectangular shape and covers the sides of the saw blade 35 as shown in Figure 1. As shown in Figure 8, the width of the first portion 511 in the front-rear direction is set so that the first portion 511 extends beyond the saw blade 35 in the front-rear direction.

[0081] The second portion 512 and the third portion 513 extend inward from both longitudinal (front-to-back) edges of the first portion 511 toward the inside of the cover 50 (the side where the saw blade 35 is located), facing each other. The contact portions 514 and 515 extend from the left ends of the second portion 512 and the third portion 513, respectively, parallel to the first portion 511 and away from the first portion 511.

[0082] As shown in Figure 24, the cover member 510 is reinforced by a plurality of ribs 516 extending in its longitudinal direction. In order to avoid interference with the flange 36 when the main body 30 and cover 50 tilt, no ribs 516 are formed in the central portion of the cover member 510 in the longitudinal direction.

[0083] As shown in Figure 25, the support member 520 is composed of a first support portion 520a, a second support portion 520b, and a bridge portion 520c. The first support portion 520a and the second support portion 520b are simple, elongated plate shapes. The bridge portion 520c is a plate shape with its longitudinal direction in the front-rear direction and has a hinge portion at its right end. The bridge portion 520c is integrated with the first support portion 520a and the second support portion 520b by welding on the front and rear left sides. The first support portion 520a and the second support portion 520b are positioned near the front and rear ends of the cover member 510, respectively, via the bridge portion 520c. A hinge mechanism 530a, 530b is formed by a part of the bridge portion 520c and a part of the cover member 510. The hinge mechanisms 530a and 530b are located at both longitudinal edges and the lower transverse edge of the cover member 510. With this configuration, the support member 520 supports the cover member 510 so that it can tilt about the second tilt axis AX7, as shown in Figures 23 to 25. The first support portion 520a and the second support portion 520b, which are spaced apart in the front-rear direction, support the cover member 510 via the bridge portion 520c, allowing the cover member 510 to tilt more stably.

[0084] The first support portion 520a and the second support portion 520b are positioned such that their positions in the vertical direction are fixed. In this embodiment, the first support portion 520a and the second support portion 520b are positioned on the base 20 so as to be movable in the left-right direction. As a result of the positioning of the first support portion 520a and the second support portion 520b on the base 20, the second tilt axis AX7 of the cover member 510 is positioned above the lower surface 21 of the base 20.

[0085] More specifically, as shown in Figure 27, the base 20 has two through holes 220a and 220b that penetrate in the left-right direction, respectively, located at two positions corresponding to the first support portion 520a and the second support portion 520b. The first support portion 520a and the second support portion 520b are slidably positioned on the base 20, passing through these through holes 220a and 220b, respectively. With this configuration, the first support portion 520a and the second support portion 520b can be securely held on the base 20. Furthermore, the base 20 has two guide grooves 210a and 210b that extend in the left-right direction. The first support portion 520a and the second support portion 520b are housed in these guide grooves 210a and 210b, respectively. With this configuration, the first support portion 520a and the second support portion 520b are prevented from being angled with respect to the left-right direction. Therefore, the sliding motion in the left-right direction becomes stable.

[0086] Such an auxiliary cover 500 is configured to tilt about the pivot axis AX2 in conjunction with the tilting motion of the cover body 52 about the first tilt axis AX6. The following describes such linked motion. As shown in Figure 1, the auxiliary cover 500 is positioned such that the upper edge of the cover member 510 is located inside the cover body 52 (the upper edge of the cover member 510 is located above the lower edge of the cover body 52). Also, as shown in Figure 6, the auxiliary cover 500 is positioned so that the contact portions 514 and 515 abut against the left inner surface of the cover body 52 (more specifically, the protruding portion 52b that protrudes toward the right) (in Figure 6, only the contact between the contact portion 514 and the left inner surface of the cover body 52 can be seen). Although not shown, the contact portions 514 and 515 are also positioned to abut against the right inner surface of the cover body 52 (more specifically, the protruding portion that protrudes toward the left). In other words, the contact portions 514 and 515 are sandwiched between the protrusion 52b on the left inner surface of the cover body 52 and the protrusion on the right inner surface of the cover body 52.

[0087] As shown in Figure 21, when the main body 30 and the cover body 52 are not inclined with respect to the base 20, and the main body 30 is at its bottom dead center, the auxiliary cover 500 (more specifically, the first portion 511 of the cover member 510) and the rotation axis AX1 of the saw blade 35 overlap each other when viewed in the direction in which the rotation axis AX1 extends (left-right direction). At this time, as shown in Figure 2, the cover member 510 extends downward to a position where there is virtually no gap between the material to be cut and the cover member 510 when the base 20 is placed on the material to be cut, and it can sufficiently cover the sides of the saw blade 35.

[0088] When the main body 30 and cover body 52 are tilted relative to the base 20 around the first tilt axis AX6 from the state shown in Figure 21 to the maximum tilt angle (60 degrees) shown in Figure 22, the left portion of the cover body 52 presses the contact portions 514 and 515 of the cover member 510 in the tilting direction of the cover body 52. ​​As a result, the cover member 510 tilts around the second tilt axis AX7. At this time, the first support portion 520a and the second support portion 520b slide to the right (in other words, in a direction perpendicular to the second tilt axis AX7, parallel to the base 20, and toward the outside of the base 20) to compensate for the misalignment between the first tilt axis AX6 and the second tilt axis AX7. In other words, the cover member 510 tilts while moving the second tilt axis AX7 toward the right. In this operation, the cover body 52 and the cover member 510 move relative to each other in the vertical direction (the direction in which the cover body 52 and the cover member 510 extend parallel to each other) so that the cover member 510 is directed upward relative to the cover body 52. ​​Here, if we let R be the vertical distance between the first tilt axis AX6 and the second tilt axis AX7, P be the relative movement of the cover member 510, and θ be the tilt angle, then the equation P = (R / cosθ) - R holds true (here, for convenience, we ignore the lateral displacement between the first tilt axis AX6 and the second tilt axis AX7) (see Figure 28). When the two tilt axes AX6 and AX7 extend vertically at a distance of R, a movement P expressed as (R / cosθ) - R will always occur. The series of operations of the auxiliary cover 500 utilizes this movement that can be expressed using trigonometric functions.

[0089] In this case, since the second tilting axis AX7 is above the lower surface 21 of the base 20, no matter how much the cover member 510 is tilted, the cover member 510 will not interfere with the material to be cut located directly below the base 20. Therefore, the maximum tilting angle can be increased compared to conventional plunge-type cutting machines. This maximum tilting angle depends on the tilting mechanism of the main body 30 and the cover body 52.

[0090] Furthermore, as shown in Figure 22, when the main body 30 and cover 50 are tilted to their maximum inclination angle, the auxiliary cover 500 (more specifically, the first portion 511 of the cover member 510) and the rotation axis AX1 of the saw blade 35 do not overlap when viewed in the direction in which the rotation axis AX1 extends (left-right direction). Therefore, the flange 36 that holds the saw blade 35 can be brought as close as possible to the lower surface 21 of the base 20. Consequently, a large cutting depth can be secured for the saw blade 35 in the material to be cut.

[0091] When the main body 30 and cover 50 are returned from the inclined state shown in Figure 22 to the non-inclined state shown in Figure 21, the right inner surface of the cover body 52 presses against the contact portions 514 and 515 of the cover member 510. As a result, the first support portion 520a and the second support portion 520b slide toward the left, while the cover member 510 tilts in opposite directions around the second tilting axis AX7, and the auxiliary cover 500 as a whole returns to the position shown in Figure 21.

[0092] According to the above configuration, the contact portions 514 and 515 are always in contact with the left inner surface and the right inner surface of the cover body 52, respectively, so that the tilting of the cover body 52 around the first tilting axis AX6 and the tilting of the cover member 510 around the second tilting axis AX7 can be smoothly linked. Moreover, since a large contact area is obtained by the contact portions 514 and 515, the linked operation becomes even smoother. However, the contact portions 514 and 515 are optional. In this case, during the linked operation when transitioning from a non-tilted state to a tilted state, the second portion 512 and the third portion 513 may be in contact with the left inner surface of the cover body 52, and during the linked operation when transitioning from a tilted state to a non-tilted state, the upper edge of the first portion 511 may be in contact with the right inner surface of the cover body 52. Furthermore, in the non-tilted state of the main body 30 and the cover 50, the contact portions 514, 515 (or the second portion 512 and the third portion 513) and the left inner surface (protruding portion 52b) of the cover body 52 do not have to be in contact. Even with such a configuration, the second portion 512 and the third portion 513 can cause the cover member 510 and the cover body 52 to come into contact at an early stage of the tilting motion, and a certain degree of effect can be obtained. Similarly, the contact portions 514, 515 and the protruding portion on the right inner surface of the cover body 52 do not have to be in contact with each other in the non-tilted state.

[0093] In addition to the functions described above, the second portion 512 and the third portion 513 also have the function of filling the gap between the cover 50 and the base 20. Specifically, the cover body 52 has two inclined portions 52a (see Figure 1) on its right side. The inclined portions 52a are inclined so that they move closer to the left side of the cover body 52 as they approach the base 20. The two inclined portions 52a are located on both sides in the longitudinal direction of the cover member 510. The inclined portions 52a are formed to avoid interference between the cover body 52 and the material to be cut when the cover 50 is inclined to the position shown in Figure 22. Since the second portion 512 and the third portion 513 are located adjacent to these two inclined portions 52a, they can fill the gap between the cover 50 and the base 20 that may be caused by the inclined portions 52a (in Figure 1, only the state in which the second portion 512 is filling the gap is visible).

[0094] Furthermore, with the above configuration, the first support portion 520a and the second support portion 520b slide against each other during tilting, compensating for any misalignment between the first tilting axis AX6 and the second tilting axis AX7. As a result, smoother interlocking movement between the cover body 52 and the cover member 510 can be achieved.

[0095] The circular saw 110 according to the second embodiment will be described below with reference to Figures 29 to 32. The circular saw 110 according to the second embodiment differs from the circular saw 10 according to the first embodiment in that it is equipped with a locking mechanism 180 instead of a locking mechanism 80, and a gear housing 160 instead of a gear housing 60. In other respects, it has the same configuration as the circular saw 10. Below, only the differences between the circular saw 110 and the first embodiment will be described.

[0096] As shown in Figure 29, the right side of the gear housing 160 has a first contact portion 161, a relief portion 162, a recess 163, and a second contact portion 164. The relief portion 162 and the recess 163 are recesses that are recessed toward the left. The relief portion 162 and the recess 163 are continuous with each other and have an overall shape that is approximately L-shaped (more precisely, an L-shape formed by an arc). The first contact portion 161 is an arc-shaped portion adjacent to the recess 163 and forms the side wall of the recess 163 along the recess 163. The second contact portion 164 is an arc-shaped portion adjacent to the relief portion 162 and forms the side wall of the relief portion 162 along the relief portion 162.

[0097] Although the shapes of the first contact portion 161, relief portion 162, recess 163, and second contact portion 164 differ from those of the first contact portion 61, relief portion 62, recess 63, and second contact portion 64 according to the first embodiment, their functions are the same.

[0098] As shown in Figure 30, the locking mechanism 180 comprises an operating lever 181 and a locking lever 183. One end of the operating lever 181 is supported by the cover body 52 so as to be pivotable about a first pivot axis AX4. The other end of the operating lever 181 is a free end extending to the rear. A cam 182 is formed around the base end (the one end mentioned above) of the operating lever 181. One end of the locking lever 183 is supported by the cover body 52 so as to be pivotable about a second pivot axis AX5. The other end of the operating lever 181 has a contact portion 184 that protrudes toward the left side (towards the gear housing 160).

[0099] As shown in Figure 30, when the main body 30 is at top dead center and the locking mechanism 80 is in the blocked position, the contact portion 184 is in a position opposite the base end of the relief portion 162 (the connection point with the recess 163). In this state, displacement of the locking mechanism 180 (in other words, the contact portion 184) from the blocked position to the permissible position is permitted. Specifically, when the user displaces the operating lever 181 from the blocked position shown in Figure 30 to the permissible position shown in Figure 31, the lock lever 183 is pressed against the cam 182, as shown in Figure 31. As a result, the lock lever 183 pivots in the opposite direction to the pivot direction of the operating lever 181. At this time, as shown in Figure 31, the contact portion 184 moves from a position opposite the base end of the relief portion 162 to a position opposite the tip of the relief portion 162 (the end opposite to the connection point with the recess 163). When the user returns the operating lever 181 from the allowable position to the blocking position, the pressing force from the cam 182 is released, and the lock lever 183 returns to its original position by its own weight.

[0100] In the state shown in Figure 31, that is, when the main body 30 is at the top dead center and the locking mechanism 180 is in the allowable position, even if the user attempts to displace the main body 30 toward the bottom dead center, the second contact portion 164 will contact the contact portion 184 in a direction that prevents such displacement. For this reason, the user cannot displace the main body 30 toward the bottom dead center.

[0101] On the other hand, in the state shown in Figure 30, that is, when the main body 30 is at the top dead center and the locking mechanism 180 is in the blocked position, when the user displaces the main body 30 to the bottom dead center, the contact portion 184 moves within the recess 163 to a position facing the tip of the recess 163 (the end opposite to the connection point with the relief portion 162), as shown in Figure 32. Therefore, displacement of the main body 30 from the top dead center to the bottom dead center is permitted.

[0102] In the state shown in Figure 32, that is, when the main body 30 is in a position other than the top dead center and the locking mechanism 80 is in the blocking position, even if the user attempts to displace the locking mechanism 180 from the blocking position toward the allowable position, the contact portion 184 will abut against the first contacted portion 161 in a direction that blocks the displacement. For this reason, the user cannot displace the locking mechanism 180 toward the allowable position.

[0103] Thus, the locking mechanism 180 and gear housing 160 can provide the same functionality as the locking mechanism 80 and gear housing 60 according to the first embodiment. Furthermore, by configuring the locking mechanism 180 to have two pivot axes, the design freedom of the locking mechanism is increased, and operability can be improved.

[0104] While embodiments of the present invention have been described above, these embodiments are provided to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and equivalents thereof are included. Furthermore, any combination or omission of the elements described in the claims and specification is possible to the extent that at least some of the above-described problems can be solved or at least some of the effects can be achieved.

[0105] For example, the locking mechanism 80,180 may be supported by the gear housing 60,160 instead of the cover body 52. ​​In this case, the components corresponding to the first contact portion 61,161, the relief portion 62,162, the recess 63,163, and the second contact portion 64,164 may be provided by the cover body 52.

[0106] Alternatively, instead of a configuration in which the main body 30 swings about the pivot axis AX2, a configuration in which the main body 30 moves horizontally in the vertical direction may be adopted. In this case, the shapes of the first contact portions 61, 161, the relief portions 62, 162, the recesses 63, 163 and the second contact portions 64, 164 can be appropriately set according to the displacement direction of the main body 30.

[0107] Alternatively, instead of the above configuration in which the engaging member 94 engages with the motor shaft 34 to prevent the rotation of the motor shaft 34 when the battery 45 is removed from the battery mounting section 46, a configuration may be adopted in which the engaging member 94 engages with the output shaft 42 to prevent the rotation of the output shaft 42 when the battery 45 is removed from the battery mounting section 46. In this case, any mechanical mechanism can be used to transmit the displacement of the operating member 90 to the engaging member 94.

[0108] Alternatively, among the various configurations described above, those not related to the battery 45 can also be applied to circular saws that use commercial power as the power source for the electric motor 33.

[0109] Alternatively, the various interlocking movements between multiple components described above may not be limited to the configuration described above, but may be achieved by any mechanical configuration capable of achieving similar functions.

[0110] Furthermore, the various embodiments described above are applicable not only to circular saws but also to any plunge-type portable processing machine (for example, a grooving cutter).

[0111] The correspondence between each component of the above embodiment and each component of the present invention is shown below. However, each component of the embodiment is merely an example and does not limit the components of the present invention. The circular saw 10 is an example of a "portable processing machine". The saw blade 35 is an example of a "cutting tool". The cover 50 is an example of a "cover". The cover body 52 is an example of a "cover body". The door 53 is an example of a "door". The opening and closing mechanism 70 is an example of an "opening and closing mechanism". The locking operation mechanism 80 is an example of a "locking operation mechanism". The top dead center is an example of a "first position". The bottom dead center is an example of a "second position". The contact parts 85, 184 are examples of "contact parts". The first contacted parts 61, 161 are examples of "first contacted parts". The relief parts 62, 162 are examples of "relief parts". The recesses 63, 163 are examples of "recesses". The second contact parts 64,164 are examples of "second contact parts". The hinge mechanism 54 is an example of a "hinge mechanism". The rotation axis AX1 is an example of a "rotation axis". The oscillating axis AX2 is an example of an "oscillating axis". The first pivot axis AX4 is an example of a "first pivot axis". The second pivot axis AX5 is an example of a "second pivot axis". The engaging part 71 is an example of an "engaging part". The compression spring 75 is an example of a "biasing member". The locking member 76 is an example of a "locking member". The battery 45 is an example of a "battery". The battery mounting part 46 is an example of a "battery mounting part". The operating part 81 and operating lever 181 are examples of "operating levers". The locking lever 183 is an example of a "locking lever". The engaging member 94 is an example of an "engaging member". The operating member 90 is an example of an "operating member". [Explanation of symbols]

[0112] 10,110...Circular saw 20...base 21...bottom surface 22...Spindle 23... Torsion spring 24, 25...Angular plate 26...Angular 27...Tranny 28, 29... thumb screws 30...Main body 31...Motor housing 32...Grip section 33... Electric motor 34...Motor shaft 35...Saw blade 36...Flange 37... Through hole 38...Trigger 39... Lock pin 40...Release button 41... Stopper 42...Output shaft 43...Reduction gear 45... Battery 46...Battery mounting section 47... Terminals 50...cover 51...recess 52...Cover body 52a...Slope part 53... Door 54...Hinge mechanism 55...Engaging part 56...Through hole 57...protrusion 58...Angle switching knob 60,160... Gear Housing 61,161...First contacted part 62,162...Escape Club 63,163... recessed 64,164...Second contacted part 70...Opening and closing mechanism 71...Engaging part 72...First engaging piece 73...Second engaging piece 74... Screws 75... Compression spring 76... Locking component 77...Engaging part 78...Pressed portion 79...step 80,180... Locking mechanism 81...Operation unit 82...Base 83...Connection part 84...Arm section 85...Abutment part 90...Operating components 91... Nobu 92...shaft 93...Pressing part 94...Engaging member 95... Ring section 96...Engaging part 97...Pressed part 98... Compression spring 99...pin 181...Operating lever 182...cam 183... Lock lever 184...Abutment part 500... Auxiliary cover 510...Cover component 511...Part 1 512...Part 2 513...Part 3 514,515...Abutment part 516... Rib 520...Support member 520a...First support section 520b...Second support section 530a, 530b... Hinge mechanism AX1... Rotation axis AX2...Oscillating axis AX3...Pivotal axis AX4...First pivot axis AX5...Second pivot axis AX6...First tilt axis AX7...Second tilt axis

Claims

1. A portable processing machine, a body having a motor configured to provide rotational drive to the cutting tool; A cover for at least partially covering the cutting tool, the cover having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; a lock operation mechanism supported displaceably on one of the cover body and the main body portion and configured to lock the opening / closing mechanism in a closed state; Equipped with The body portion is configured to be displaceable relative to the cover between a first position in which the blade is entirely housed within the cover and a second position in which the blade is partially exposed outside the cover; The lock operation mechanism is configured to be manually displaceable between a blocking position that blocks the opening and closing mechanism from opening the door and an allowing position that allows the opening of the door by the opening and closing mechanism, The portable processing machine includes: When the main body portion is in the first position, the lock operation mechanism is permitted to move from the blocking position to the allowing position, When the main body is in a position other than the first position, the lock operation mechanism is prevented from moving from the blocking position to the allowing position by the abutment of the other of the cover body and the main body with the lock operation mechanism. It was configured as Portable processing machine.

2. 2. The portable processing machine according to claim 1, the lock operation mechanism includes an abutment portion that protrudes toward the other of the cover body and the main body portion and is configured to be displaceable between the blocking position and the allowing position, The other of the cover body and the main body portion is a first abutted portion that abuts against the abutment portion in a direction that prohibits the abutment portion from displacing from the blocking position to the allowing position when the main body portion is in a position other than the first position; a recessed portion disposed adjacent to the first contacted portion, the recessed portion being in a band shape and recessed from the first contacted portion in a protruding direction of the contact portion; Equipped with When the main body is in the first position, the contact portion is located at a position facing the recess and does not contact the first contacted portion in a direction that prohibits the contact portion from displacing from the blocking position to the allowing position. Portable processing machine.

3. The portable processing machine according to claim 1 or 2, The lock operation mechanism is supported by the cover body. Portable processing machine.

4. The portable processing machine according to any one of claims 1 to 3, the cover includes a hinge mechanism for opening and closing the door, When the side where the cutting tool performs machining is defined as the front side and the opposite side is defined as the rear side, the hinge mechanism is disposed on the front side or rear side of the rotation axis of the cutting tool, The hinge mechanism is oriented so that the rotational movement of the door by the hinge mechanism includes a horizontal component when the portable processing machine is in use. Portable processing machine.

5. The portable processing machine according to claim 4, The hinge mechanism is oriented such that a rotational movement of the door by the hinge mechanism includes a vertical component when the portable processing machine is in use, and an opening movement of the door includes a vertical component directed upward. Portable processing machine.

6. The portable processing machine according to claim 4 or 5, The hinge mechanism is disposed forward of the rotation axis of the cutting tool, The opening / closing mechanism and the lock operation mechanism are disposed rearward of the rotation axis of the cutting tool. Portable processing machine.

7. A portable processing machine according to claim 2 or any one of claims 3 to 6 which includes claim 2 as a dependent element, The main body is configured to be swingable relative to the cover between the first position and the second position about a swing axis, The abutting portion and the first abutted portion are disposed at a position closer to the swing axis than to the rotation axis of the cutting tool. Portable processing machine.

8. 8. The portable processing machine according to claim 7, The first abutment portion is formed in an arc shape, the other of the cover body and the main body portion includes a recess that is recessed further than the first abutted portion and is formed adjacent to the first abutted portion and along the first abutted portion; When the main body portion is displaced between the first position and the second position with the abutment portion located at the blocking position, the main body portion and the abutment portion move relatively with the abutment portion facing the recess. Portable processing machine.

9. A portable processing machine according to claim 2 or any one of claims 3 to 8 which includes claim 2 as a dependent element, The other of the cover body and the main body portion includes a second abutted portion formed in a band shape along the relief portion, and the second abutted portion abuts against the abutting portion in a direction that prohibits displacement of the main body portion from the first position toward the second position when the abutting portion is in the permitted position. Portable processing machine.

10. A portable processing machine according to any one of claims 1 to 9, The opening and closing mechanism includes an engagement portion configured to be displaceable between a closed position where the opening and closing mechanism engages with the door to hold the door in a closed state and an open position where the opening and closing mechanism does not engage with the door to make the door openable, The engagement portion is operably connected to the lock operation mechanism such that the engagement portion is located at the closed position when the lock operation mechanism is located at the blocking position, and the engagement portion is located at the open position when the lock operation mechanism is located at the allowing position. Portable processing machine.

11. 11. The portable processing machine according to claim 10, The opening and closing mechanism includes: A biasing member; a lock member that is biased in the opening direction of the door by the biasing member and is disposed so as to be displaceable in the opening and closing direction of the door; Equipped with The locking member is When the door is closed, the door is pressed against the biasing force and is positioned at a position that does not interfere with the displacement of the engagement portion from the closed position to the open position, When the door is open, the door is pressed by the biasing force of the biasing member and is positioned at a position that interferes with the displacement of the engagement portion from the open position to the closed position. It was configured as Portable processing machine.

12. A portable processing machine according to any one of claims 1 to 11, the main body includes a battery mounting section configured to allow a battery that functions as a power source for the motor to be slidably mounted therein; The lock operation mechanism includes: When the lock operation mechanism is in the permitted position, the lock operation mechanism is located at a position where it interferes with a sliding path of the battery when the battery is mounted in the battery mounting portion, When the lock operation mechanism is in the blocking position, the lock operation mechanism is positioned so as not to interfere with the slide path. Configured to displace Portable processing machine.

13. A portable processing machine, a body having a motor configured to provide rotational drive to the cutting tool; A cover for at least partially covering the cutting tool, the cover having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; a lock operation mechanism supported displaceably on one of the cover body and the main body portion and configured to lock the opening / closing mechanism in a closed state; Equipped with The body portion is configured to be displaceable relative to the cover between a first position in which the blade is completely housed within the cover and a second position in which the blade is partially exposed outside the cover; The lock operation mechanism is configured to be manually displaceable between a blocking position that blocks the opening and closing mechanism from opening the door and an allowing position that allows the opening of the door by the opening and closing mechanism, The portable processing machine includes: When the main body portion is in the first position, the lock operation mechanism is permitted to move from the blocking position to the allowing position, When the main body portion is in a position other than the first position, the displacement of the lock operation mechanism from the blocking position to the allowing position is prohibited by the abutment of the other of the cover main body and the main body portion with the lock operation mechanism, When the lock operation mechanism is in the blocking position, the main body portion is permitted to move from the first position toward the second position, When the lock operation mechanism is located at the permitted position, the displacement of the main body portion from the first position toward the second position is prohibited by the abutment of the other of the cover main body and the main body portion with the lock operation mechanism. It was configured as Portable processing machine.

14. A portable processing machine according to any one of claims 1 to 13, The lock operating mechanism has the form of a pivotable operating lever. Portable processing machine.

15. 15. The portable processing machine according to claim 14, The lock operation mechanism includes: an operating lever that is pivotable about a first pivot axis; a lock lever that is at least temporarily pressed by the operating lever as the operating lever pivots, and is pivotable about a second pivot axis different from the first pivot axis, and that abuts against the other of the cover body and the main body to prohibit displacement of the lock operation mechanism from the blocking position to the allowing position when the main body is in a position other than the first position; Equipped Portable processing machine.

16. A portable processing machine according to any one of claims 1 to 11 and claims 13 to 15, the main body includes a battery mounting section configured to allow a battery that functions as a power source for the motor to be slidably mounted therein; The portable processing machine is configured such that an operation for displacing the lock operation mechanism from the blocking position to the allowing position is possible only when the main body is in the first position and the battery is not attached to the battery attachment portion. Portable processing machine.

17. A portable processing machine, a body having a motor configured to provide rotational drive to the cutting tool; A cover for at least partially covering the cutting tool, the cover having a cover body and an openable / closable door; an opening / closing mechanism supported by the cover body and configured to open and close the door; a lock operation mechanism supported displaceably on one of the cover body and the main body portion and configured to lock the opening / closing mechanism in a closed state; Equipped with The body portion is configured to be displaceable relative to the cover between a first position in which the blade is completely housed within the cover and a second position in which the blade is partially exposed outside the cover; The lock operation mechanism is configured to be manually displaceable between a blocking position that blocks the opening and closing mechanism from opening the door and an allowing position that allows the opening of the door by the opening and closing mechanism, the main body includes a battery mounting portion configured to be able to mount a battery that functions as a power source for the motor; The portable processing machine is configured such that an operation for displacing the lock operation mechanism from the blocking position to the allowing position is possible only when the main body is in the first position and the battery is not attached to the battery attachment portion. Portable processing machine.

18. A portable processing machine, A main body including a motor having a motor shaft, an output shaft configured to output a rotational driving force of the motor shaft to a cutting tool, and a battery mounting portion configured to be able to mount a battery that functions as a power source for the motor; A cover for at least partially covering the cutting tool; an engaging member configured to be displaceable between an engaged position in which the engaging member engages with the motor shaft or the output shaft to prevent rotation of the motor shaft and the output shaft when the motor is not driven, and a disengaged position in which the engaging member does not engage with either the motor shaft or the output shaft to allow rotation of the motor shaft and the output shaft; an operating member that is pressed by the battery when the battery is attached to the battery attachment portion and displaced from an initial position to a pressed position; Equipped with The body portion is configured to be displaceable relative to the cover between a first position in which the blade is completely housed within the cover and a second position in which the blade is partially exposed outside the cover; The engaging member and the operating member are configured to cooperate with each other such that when the operating member is located at the initial position, the engaging member is located at the engaging position, and when the operating member is located at the pressed position, the engaging member is located at the disengaged position. Portable processing machine.

Images