JP2023114185A - portable processing machine - Google Patents

Abstract

To provide a portable processing machine that can simultaneously realize a gripping portion capable of rotatably changing a position, and a top dead point locking function of a body portion.SOLUTION: A portable processing machine is equipped with a base and a body portion that is disposed on a first side with respect to the base. The body portion is equipped with a handle configured to rotatably change a fixed position of a gripping portion. The body portion can be displaced with respect to the base between a first position where a blade tool is on the first side with respect to the base, and a second position where the blade tool partially projects out to a second side opposite to the first side beyond the base. The body portion is equipped with a lock operation member arranged adjacent to the gripping portion, and an engaging member. The lock operation member and the engaging member interlock at least via inner wire of a Bowden cable. When the lock operation member is at the lock position, the engaging member engages with the base or a fixed part that is a part other than the base whose position relative to the base is fixed, thereby preventing the displacement of the main body portion from the first position to the second position.SELECTED DRAWING: Figure 9

Description

The present invention relates to portable processing machines.

Wall chasers for grooving walls, floors, ceilings, etc. have been known as a type of portable processing machine. For example, the wall chaser disclosed in Patent Document 1 below includes a base for contacting a workpiece (wall, floor, ceiling, etc.), and a base disposed on one side of the base so as to be swingable with respect to the base. and a main body configured to: The main body includes a motor that provides rotational driving force to the cutting tool, a battery that supplies power to the motor, and two grips that are manually gripped by the user. With the base in contact with the workpiece and the motor rotating, when the user swings the main body in a direction approaching the base while holding the two grips with both hands, the cutting tool rotates. Project beyond the base. In this state, a groove is formed in the workpiece by parallelly moving the wall chaser in a direction orthogonal to the rotation axis of the cutting tool (also called a processing progress direction). The grooves thus formed are used, for example, for electrical wiring.

U.S. Patent Application Publication No. 2020/0164449

However, the wall chaser described above leaves room for improvement. For example, in this type of tool, there is a desire to rotationally change the position of the gripping portion in the main body according to the situation. There is also a desire to lock the body at top dead center when the body is at top dead center (the swinging position where the body is furthest from the base). These demands are not limited to wall chasers, but are common to various portable processing machines such as plunge circular saws and plunge routers. In view of the above, an object of the present disclosure is to provide a portable processing machine capable of simultaneously realizing a gripping portion whose position can be changed rotationally and a top dead center locking function of the main body portion.

This specification discloses a portable processing machine. This portable processing machine includes a base having an abutment surface for abutting against a workpiece, and a main body disposed on a first side of the base in a direction orthogonal to the abutment surface. may be The main body has a motor configured to provide a rotational driving force to the cutting tool about the axis of rotation, and a handle having a gripping portion, and is configured to be able to rotationally change the fixed position of the gripping portion. and a handle. The body portion has a first position in which the cutting tool is located on a first side with respect to the base and a second position in which the cutting tool partially protrudes beyond the base on a second side opposite the first side. , and may be configured to be displaceable with respect to the base. The body may further comprise a lock operating member, a displaceable engagement member and a Bowden cable. The lock operating member may be positioned adjacent to the grip and has a lock position for locking the body in the first position and allowing displacement of the body from the first position to the second position. may be displaceable by manual operation between the unlocked position for The Bowden cable may have an outer cable having a first end and a second end opposite the first end, and an inner wire passing through the outer cable. The lock operating member and the engaging member may be configured to interlock at least via the inner wire. In the portable processing machine, when the lock operating member is in the locked position, the engaging member engages with the base or the fixed portion which is a portion other than the base whose position is fixed with respect to the base, thereby Displacement from the first position to the second position is blocked, the engagement member does not engage with the base or the fixed portion when the lock operation member is in the unlocked position, and the main body portion moves from the first position to the second position. It may be configured to allow displacement to two positions.

According to the above configuration, the engaging member is interlocked with the displacement of the lock operation member between the locking position and the unlocking position via at least the inner wire of the Bowden cable, and when the unlocking member is at the locking position Additionally, the engaging member engages the base or fixed portion to prevent displacement of the body portion from the first position to the second position. Since the Bowden cable can bend (or bend) according to the rotation of the grip, it transmits the displacement force of the lock operation member to the engaging member without being affected by the rotational movement of the handle (gripping portion). be able to. For this reason, even in a portable processing machine provided with a handle (that is, a rotary movable handle) configured to be able to rotate the fixed position of the gripping portion, top dead center lock (lock at the first position) Functions can be easily realized. In other words, it is possible to easily achieve both the rotary movable handle and the top dead center lock function.

FIG. 3B is a left side view of the wall chaser according to one embodiment, with the main body at top dead center; It is a right view of a wall chaser, and a main-body part is in a top dead center. It is the figure which looked at the wall chaser from the front side. It is the figure which looked at the wall chaser from the lower side and the rear side. It is a left side view of a wall chaser, and a main-body part is in a bottom dead center. It is a cross-sectional view of a wall chaser. FIG. 3 is a right side perspective view of the wall chaser with some parts removed; Fig. 2 is a perspective view from the left side of the wall chaser with some parts removed and the engaging member in the engaged position; Fig. 2 is a perspective view from the left side of the wall chaser with some parts removed and the engaging member in the disengaged position; FIG. 4 is a vertical cross-sectional view of the wall chaser with some parts removed, and the lock operation member is in the locked position; FIG. 4 is a vertical cross-sectional view of the wall chaser with some parts removed, and the lock operation member is in the unlocked position; 1 is a perspective view of a Bowden cable; FIG. It is a perspective view of a lock operation member. It is a perspective view of a link member. It is a perspective view of an engaging member.

Below, representative and non-limiting embodiments of the present invention will be described in detail with reference to the drawings. This detailed description is merely intended to provide those skilled in the art with details for implementing a preferred embodiment of the invention, and is not intended to limit the scope of the invention. Moreover, the additional features and inventions disclosed below can be used separately or in conjunction with other features and inventions to provide still improved apparatus, methods of making and using the same.

Moreover, any combination of features and steps disclosed in the following detailed description are not required to practice the invention in its broadest sense, but are specifically intended to illustrate representative embodiments of the invention only. is described. Moreover, various features of the representative embodiments described above and below, as well as those set forth in the independent and dependent claims, are described herein in providing additional and useful embodiments of the invention. They do not have to be combined in the exact order given or in the order listed.

All features described and/or claimed herein, apart from the configuration of the embodiments and/or claimed features, are subject to the original disclosure and claimed particular matter. As limitations, they are intended to be disclosed individually and independently of each other. Further, all statements in numerical ranges and groups or populations are intended as limitations on the original disclosure as well as the specific subject matter claimed and to disclose configurations intermediate thereto.

In one or more embodiments, the portable processing machine may include a link member housed within the handle and coupled to the inner wire. The link member may comprise a link member that engages with the lock operation member at least when the lock operation member is in the unlocked position. The lock operation member and the engaging member may be configured to be interlocked via at least the inner wire and the link member. According to this configuration, by interposing the link member between the lock operation member and the inner wire, the direction of action of the displacement force of the lock operation member can be changed to the direction of action of the displacement force of the engagement member with a higher degree of freedom. can be converted. Therefore, the displacement direction of the lock operation member can be easily set so that the user can easily operate it manually.

In one or more embodiments, the lock operating member may be configured to rotate between locked and unlocked positions about a rotation axis parallel to the grip. According to this configuration, the user can easily grip and operate the lock operation member with the hand that grips the grip portion.

In one or more embodiments, the body may include a spindle that rotatably supports the handle. The handle may include a base portion through which the support shaft passes, and a bridge portion connecting the base portion and the grip portion such that a gap is formed between the base portion and the grip portion. The Bowden cable may be arranged so that it does not pass either through the base or around the spindle. According to this configuration, the displacement force of the lock operating member can be transmitted to the engaging member with a simple structure.

In one or more embodiments, the first end of the outer cable may be coupled to the bridge so that the inner wire can pass through the bridge. The link member is substantially L-shaped and has a first portion that extends inside the grip portion and engages with the lock operation member, and a second portion that extends inside the bridge portion and is connected to the inner wire. It may have a shape. According to this configuration, rotational displacement of the lock operation member can be easily converted into displacement of the inner wire in the direction along the outer cable. Therefore, the operation direction of the lock operation member can be set in a direction that is easy for the user to grip (the rotation direction about the rotation axis parallel to the grip portion).

In one or more embodiments, the outer cable may be arranged so that it does not pass through the interior of the portable processing machine. With this configuration, it is not necessary to bend the outer cable in a complicated manner, so smooth displacement of the inner wire is possible. Alternatively, there is no need to design a portable processing machine to accommodate the bending limits of the outer cable. In other words, the structure and size of the portable processing machine can be optimized without being affected by the bending limit of the outer cable.

In one or more embodiments, the first end of the outer cable may be coupled to the handle with the inner wire extending to the interior of the handle. The second end of the outer cable may be connected to a portion of the main body other than the handle with the inner wire extending into the interior of the portion of the main body other than the handle. The outer cable may be curved 180 degrees from the first end to the second end. According to this configuration, the outer cable is not complicatedly bent, so smooth displacement of the inner wire is possible. In addition, since the outer cable has a simple curved shape, the outer cable hardly interferes with the carrying of the portable processing machine and the grooving work, and the handling of the portable processing machine is improved.

In one or more embodiments, the portable processing machine may be a wall chaser. The body portion may include a cover body that partially covers the cutting tool. The portable processing machine includes an auxiliary cover portion extending from the base toward the first side and covering a portion of the cutting tool on the second side relative to the cover body when the body portion is at the first position. may be provided. The first end of the outer cable may be connected to the cover body with the inner wire extending to the inside of the cover body. The fixed portion may be a first side edge of the auxiliary cover portion. According to this configuration, the engaging member engages with the edge portion on the first side of the auxiliary cover portion extending from the base toward the first side (the side approaching the main body portion). The extension distance of the outer cable can be shortened compared to the case where the and the engaging member are engaged with each other. Also, the shape of the engaging member can be simplified.

In one or more embodiments, the engagement member may be coupled to the inner wire inside the cover body. The engaging member may be arranged to slide within a recess formed in the inner surface of the cover body. The engaging member may be configured to partially protrude from the recess when the lock operating member is in the locked position, and the protruding portion engages the edge of the first side of the auxiliary cover portion. According to this configuration, the engagement member can be held by the cover body with a simple configuration.

In one or more embodiments, the Bowden cable may be located on the same side of the cover body as the motor in the direction along which the axis of rotation of the cutting tool extends. According to this configuration, for example, when grooving a wall near the ceiling, the side of the cover body on which the motor is not arranged is closer to the ceiling than the side on which the motor is arranged. By arranging a wall chaser on the wall and performing grooving, a groove can be formed near the ceiling without the Bowden cable interfering with the ceiling.

The wall chaser 10 as an exemplary embodiment will be described in more detail below with reference to the drawings. The wall chaser 10 is an electric tool for grooving workpieces such as walls, floors, and ceilings. The wall chaser 10 described below is also referred to as a double-row grooving cutter, and can process two rows of grooves at the same time. As shown in FIGS. 1 and 2, the wall chaser 10 includes a base member 20 and a body portion 30. As shown in FIGS. The base member 20 includes a substantially rectangular substantially flat base 21 . The body portion 30 is arranged on one side of the base 21 . The surface of the base 21 opposite to the body portion 30 is formed flat and functions as a contact surface 23 for contacting a workpiece (floor, ceiling, wall, etc.).

As shown in FIG. 6, the main body 30 is configured to rotationally drive two substantially disk-shaped cutting tools 49 and 50 mounted on a spindle 45 about a rotation axis AX2. The cutting tools 49, 50 are also called diamond blades. The cutting tools 49 and 50 are arranged parallel to each other. The contact surface 23 of the base member 20 is brought into contact with the workpiece, and the rotating cutting tools 49 and 50 protrude beyond the contact surface 23 to the opposite side of the main body 30 (see FIG. 4). , 50 are aligned in parallel (in other words, the direction in which the rotation axis AX2 extends), and by parallelly moving the wall chaser 10 in a direction parallel to the contact surface 23, a groove is formed on the workpiece. Cutting progresses.

As a result, two linear grooves are formed on the workpiece at positions corresponding to the locus of movement of the cutting tools 49 and 50 . The portion between the two grooves is scraped off with any tool to finally form one large groove. An electrical wiring can be accommodated in the groove thus formed.

Hereinafter, for convenience of explanation, the direction in which the wall chaser 10 is translated with respect to the workpiece when performing grooving is defined as the front-rear direction of the wall chaser 10 . In the longitudinal direction, the side closer to the rotation axis AX2 of the cutting tools 49 and 50 is defined as the front side of the wall chaser 10, and the side farther from the rotation axis AX2 is defined as the rear side of the wall chaser 10. In addition, in the direction orthogonal to the contact surface 23 , the side where the main body portion 30 is located is defined as the upper side of the wall chaser 10 , and the opposite side is defined as the lower side of the wall chaser 10 . Further, a direction orthogonal to the front-back direction and the up-down direction is defined as the left-right direction of the wall chaser 10 . The right side of the wall chaser 10 is defined as the right side of the wall chaser 10 when the front side is viewed from the rear side, and the opposite side is defined as the left side of the wall chaser 10 .

As shown in FIG. 2, the body portion 30 includes a gear housing 31, a motor housing 32, a rear housing 33, and a cover body . The gear housing 31, the motor housing 32, and the rear housing 33 are arranged in this order from the front side in the front-rear direction. As shown in FIGS. 1 to 3, the cover body 34 is positioned on the left side with respect to the gear housing 31, motor housing 32 and rear housing 33. As shown in FIGS.

As shown in FIG. 6, the motor housing 32 accommodates an electric motor 41 (hereinafter simply referred to as the motor 41). The motor 41 includes a motor shaft 42 rotatably supported by bearings spaced apart in the front-rear direction. The motor shaft 42 is rotatable around a rotation axis AX1 extending in the front-rear direction. The motor 41 (motor shaft 42) provides the cutting tools 49 and 50 with rotational driving force about the rotation axis AX2.

As shown in FIG. 5, the gear housing 31 accommodates a gear mechanism for transmitting the rotational driving force of the motor shaft 42 to the cutting tools 49 and 50 . Specifically, the gear housing 31 accommodates a small bevel gear 43 , a large bevel gear 44 , and a spindle 45 . A small bevel gear 43 is fixed around the motor shaft 42 at the front end of the motor shaft 42 . The spindle 45 is rotatably supported about the rotation axis AX2 by bearings spaced apart in the vertical direction. The rotation axis AX2 intersects (more specifically, orthogonally) with the rotation axis AX1 of the motor shaft 42 . A large bevel gear 44 is fixed around the spindle 45 at the right end of the spindle 45 and meshes with the small bevel gear 43 .

The spindle 45 extends in the left-right direction within the gear housing 31 , extends from the gear housing 31 on the left side, and extends into the cover body 34 . An inner flange 46 is mounted around the spindle 45 within the cover body 34 . The inner flange 46 is a tubular member, and the right end thereof protrudes in a flange shape radially outward with respect to the rotation axis AX2. A male threaded portion is formed below the inner flange 46 of the spindle 45, and a lock nut 47 is attached to the male threaded portion. A cutting tool 49, at least one (five in the example of FIG. 5) annular spacers 48, and a cutting tool 50 are sandwiched between the right end of the inner flange 46 and the lock nut 47, and the lock nut 47 is tightened. Thereby, the positions of the cutting tools 49 and 50 with respect to the spindle 45 are fixed. By changing the number of spacers 48 arranged between the cutting tools 49 and 50, the separation distance between the cutting tools 49 and 50 can be adjusted.

With such a configuration, the rotational driving force of the motor 41 (motor shaft 42) is transmitted to the cutting tools 49 and 50. As shown in FIG. As shown in FIG. 4, an arrow 35 indicating the direction of rotation of the cutting tools 49 and 50 is attached to the left side of the cover body 34 .

As shown in FIGS. 1 and 2, the base member 20 includes an auxiliary cover portion 22 extending from the base 21 toward the side opposite to the contact surface 23 (in other words, the main body portion 30 side). As shown in FIG. 8 , the auxiliary cover portion 22 extends above the lower edge of the cover body 34 inside the cover body 34 .

As shown in FIG. 4, the base member 20 has an annular portion 25 at its rear end. The annular portion 25 is arranged above the base 21 . The body portion 30 also includes two annular portions 36 . The two annular portions 36 are arranged on both sides of the annular portion 25 in the left-right direction. A support shaft 26 extending in the left-right direction is arranged so as to pass through the annular portions 25 and 36 . The base member 20 and the body portion 30 are integrated via the support shaft 26 . Wheels 27 are attached to both ends of the support shaft 26 . When the wall chaser 10 is pressed against the workpiece and moved in parallel in the front-rear direction by the wheels 27 to perform grooving, the parallel movement is facilitated.

The body portion 30 is configured to be swingable with respect to the base member 20 about the support shaft 26 . The body portion 30 is always biased away from the base member 20 by a torsion spring (not shown) arranged to surround the support shaft 26 . Therefore, in the initial state, the body portion 30 is held at the position shown in FIGS. 1 and 2 . The position of the main body portion 30 at this time is also referred to as a top dead center. As shown in FIGS. 1 and 3, an arcuate through hole 37 is formed in the left portion of the cover body 34 . Further, as shown in FIG. 8, a projection 28 protrudes leftward from the outer surface of the left portion of the auxiliary cover portion 22 . As shown in FIG. 1, the protrusion 28 penetrates through the through hole 37 . Positioning the projection 28 at the lower end of the through hole 37 defines the position of the top dead center and prevents the lower edge of the cover body 34 from being displaced above the upper edge of the auxiliary cover portion 22 . be done. As shown in FIGS. 1 and 2, the cutting tools 49 and 50 are positioned above the base 21 when the main body 30 is at the top dead center. At this time, the auxiliary cover portion 22 of the base member 20 covers portions of the cutting tools 49 and 50 below the cover body 34 . The cover main body 34 covers portions of the cutting tools 49 and 50 above the auxiliary cover portion 22 .

The position of the lower movement end of the main body 30 (lower movement limit position) for the swing motion of the main body 30 can be variably set by a cutting depth adjusting mechanism 38 (hereinafter simply referred to as the adjusting mechanism 38). . Specifically, as shown in FIG. 10, the cutting depth adjusting mechanism 38 includes a bolt, a nut that screws onto the bolt, and an operating lever. The head of the bolt is located outside (right side) of the right side portion of the cover body 34, and an operation lever is attached around it. An arc-shaped through hole 39 is formed in the right portion of the cover body 34 . A bolt is arranged to pass through the through hole 39 . The nut is positioned inside (left side) of the right side portion of the cover body 34 . The user can move the adjustment mechanism 38 to any position along the arc shape of the through hole 39 by operating the operation lever to loosen the bolt. When the user tightens the adjustment mechanism 38, the bolt and nut tighten the right portion of the cover body 34 in the left-right direction. This fixes the adjustment mechanism 38 to the cover body 34 at that position.

The body portion 30 can be pushed down by the user until the bolt of the adjustment mechanism 38 abuts the upper edge 29 of the auxiliary cover portion 22 . That is, the position where the bolt of the adjusting mechanism 38 and the upper edge portion 29 of the auxiliary cover portion 22 abut becomes the position of the lower movement end of the main body portion 30 . The position of the body portion 30 when the body portion 30 is lowered to the bottom end in a state in which the position of the bottom end of the movement is set by the adjustment mechanism 38 to the lowermost side of the movable range is also referred to as the bottom dead center. be.

When the body portion 30 is at the bottom dead center as shown in FIG. 5 (or when the body portion 30 is at the lower movement end), the cutting tools 49 and 50 are inserted through the through holes 24 of the base 21 (see FIG. 4). , and partially protrudes downward beyond the lower surface (contact surface 23) of the base 21. As shown in FIG. Such a mechanism allows the user to adjust the depth of cut by the cutting tools 49,50. When the user releases the force pushing down on the main body 30 in a state where the main body 30 is at the lower movement end, the main body 30 returns to the top dead center due to the biasing force of the torsion spring.

As shown in FIGS. 1 and 2 , the body portion 30 further includes a battery mounting portion 51 configured to allow attachment and detachment of a battery 54 for supplying electric power to the motor 41 . The battery mounting portion 51 is positioned above the rear housing 33 and formed integrally with the rear housing 33 . The battery mounting portion 51 is slidably attachable/detachable with the battery 54 directed from the rear side to the front side. Specifically, the battery mounting portion 51 includes a plurality of terminals (not shown) extending like a rail. When the battery 54 is mounted on the battery mounting portion 51 by sliding the battery 54 in the direction in which the terminals extend, the terminals of the battery mounting portion 51 and the terminals (not shown) of the battery 54 are connected. electrically connected. A commercial power source may be used instead of the battery 54 as the power source for the motor 41 .

As shown in FIGS. 1 and 2, body portion 30 further includes a first handle 60 and a second handle 70 . The first handle 60 is positioned on the rear side of the rear housing 33 adjacent to the rear housing 33 . The first handle 60 is a so-called loop handle and has a first grip portion 61 to be gripped by the user's hand. An operating member 62 for starting and stopping the motor 41 is attached to one side of the first gripping portion 61 in the direction in which the first gripping portion 61 extends.

When the user pulls the operation member 62 rearward, it is detected by a switch (not shown) accommodated inside the first grip portion 61, and the motor is operated from the battery 54 via a controller (not shown). Power is supplied to 41 and the motor 41 is started. When the user releases the pull operation, the power supply to the motor 41 is stopped and the motor 41 is stopped.

In this embodiment, the first handle 60 is attached to the rear end of the rear housing 33 so as to be rotatable about a rotation axis parallel to the rotation axis AX1 of the motor shaft 42 . The first handle 60 is selectively lockable in the position shown in FIG. 1, rotated 90 degrees to the right from the position shown in FIG. 1, and rotated 90 degrees to the left from the position shown in FIG. configured to

As shown in FIGS. 1 and 2 , the second handle 70 is positioned forward of the first handle 60 . More specifically, the second handle 70 is attached to the top of the cover body 34 near the front end of the cover body 34 . As shown in FIG. 7, the second handle 70 is a so-called loop handle, and includes a second grip portion 71 for the user to grip by hand, base portions 72 and 73, and bridge portions 74 and 75. I have. The second grip portion 71 extends in the left-right direction parallel to the contact surface 23 . The base portions 72 and 73 are arranged on both sides of the annular portion 34a in the left-right direction. The annular portion 34 a is a portion formed integrally with the cover body 34 so as to protrude upward from the cover body 34 . The bridge portions 74 and 75 connect the base portions 72 and 73 and the second grip portion 71 so that a gap is formed between the base portions 72 and 73 and the second grip portion 71 .

In this embodiment, the second handle 70 is configured to be rotatable about a rotation axis parallel to the rotation axis AX2 of the cutting tools 49,50. Specifically, as shown in FIG. 10, a support shaft 76 extending parallel to the second grip portion 71 penetrates the base portions 72 and 73 and the annular portion 34a in the left-right direction. With this configuration, the second handle 70 is rotatably supported by a support shaft 76 supported by the annular portion 34a.

A hexagonal nut 77 is attached to the left end of the support shaft 76 so as to be screwed with a male screw formed at the tip of the support shaft 76 . The hexagonal nut 77 is housed inside the base portion 72 in a non-rotating state. A knob 79 is attached to the right end of the support shaft 76 . The knob 79 is located on the right side of the base portion 73 . When the user loosens the knob 79 , the second handle 70 is rotatable around the support shaft 76 . When the user tightens the knob 79 when the second handle 70 is at the desired rotational position, the hexagonal nut 77 and the knob 79 tighten the bases 72, 73 and the annular portion 34a in the left-right direction. The rotational position of handle 70 is fixed. With such a configuration, the user can rotationally change the fixed position of the second grip portion 71 . As shown in FIG. 7, each of the base portions 72, 73 and the annular portion 34a is formed with a plurality of uneven shapes along the circumferential direction. It can be fixed at any position where the unevenness and the unevenness of the annular portion 34a mesh with each other.

The wall chaser 10 described above can be used as follows. The user first grips the first grip portion 61 with one hand and grips the second grip portion 71 with the other hand. The user then positions the wall chaser 10 so that the contact surface 23 contacts the workpiece. Next, the user pulls the operation member 62 with the fingers of the hand that grips the first handle 60 to activate the motor 41 . Next, the user applies force to the hand holding the second handle 70 to press the main body part 30 toward the base 21 to displace the main body part 30 from the top dead center to the bottom dead center. Then, the user translates the wall chaser 10 in the front-rear direction to perform grooving. In the present embodiment, the direction in which the wall chaser 10 advances the grooving (hereinafter also referred to as the machining advancing direction) is the direction from the front side to the rear side. However, the wall chaser 10 may be designed so that the processing progress direction is the direction from the rear side to the front side. Alternatively, the wall chaser 10 (for example, the shape of the cutting tools 49 and 50) is designed so that the user can select the processing progress direction from the direction from the front side to the back side and from the direction from the back side to the front side according to the situation. may be designed.

The wall chaser 10 described above has a function of locking the main body 30 at the top dead center. Such functions are described below. As shown in FIG. 3, the wall chaser 10 has a lock operation member 81. As shown in FIG. The lock operation member 81 is arranged adjacent to the second grip portion 71 . Specifically, the lock operation member 81 is arranged such that its longitudinal direction is parallel to the extending direction of the second grip portion 71 . As shown in FIG. 13, the lock operation member 81 includes an operation portion 82, a protrusion 83, and two shaft portions 84. As shown in FIG. The operation part 82 is a part for a user to grip and operate, and has a convex curved part toward the support shaft 76 side. The protrusion 83 protrudes from the substantially central portion of the lock operation member 81 in the longitudinal direction to the side opposite to the curved portion. The two shaft portions 84 extend in the left-right direction from both longitudinal edge portions of the operation portion 82 .

As shown in FIG. 10 , the lock operation member 81 has two shafts 84 rotatably supported by the second grip 71 and an operation part 82 that extends inside the loop shape of the second handle 70 . It is attached to the second grip portion 71 so as to be exposed toward it. As a result, the lock operation member 81 is supported by the second gripping portion 71 so as to be rotatable about a rotational axis parallel to the second gripping portion 71 (the axis of the shaft portion 84 extending in the left-right direction). there is

The lock operation member 81 has a lock position (see FIG. 10) for locking the body portion 30 at the top dead center and an unlock position (see FIG. 10) for allowing displacement of the body portion 30 from the top dead center to the bottom dead center. 11) and can be displaced (rotated) by manual operation. In the initial state, the lock operation member 81 is biased to the lock position by the link member 85 biased by the compression spring 95 . When the user grips the second grip portion 71, the lock operation member 81 is rotated from the lock position to the unlock position by gripping the lock operation member 81 together.

As shown in FIG. 10 , the wall chaser 10 further includes link members 85 . The link member 85 is a substantially L-shaped member having a first portion 86 and a second portion 87 . The link member 85 has a first end 88 that is the tip of the first portion 86 and a second end 89 that is the tip of the second portion 87 . The second end 89 has a bifurcated shape with a gap 91 . A screw hole 92 is formed in the second end portion 89 so as to penetrate the forked shape. Two shaft portions 90 extending in a direction perpendicular to the direction in which the first portion 86 extends are formed near the proximal end of the first portion 86 .

As shown in FIG. 10, the link member 85 has a first portion 86 extending in the left-right direction (extending direction of the second gripping portion 71) in the second grip portion 71, and a second portion 87 is accommodated in the second handle 70 so as to extend in the bridge portion 75 in the direction of connecting the second grip portion 71 and the base portion 73 (extending direction of the bridge portion 75). The two shafts 90 are rotatably supported within two bosses 78 (only one of which is visible in FIG. 10). This allows the link member 85 to rotate about the axis of the shaft portion 90 .

The first end portion 88 is positioned substantially at the center of the second grip portion 71 in the left-right direction. A compression spring 95 is arranged between the first end 88 and the inner surface of the second grip 71 . The compression spring 95 always biases the first end portion 88 toward the lock operation member 81 . Therefore, in the initial state, the first end 88 is held at the position shown in FIG.

As shown in FIG. 7, the wall chaser 10 further comprises a Bowden cable 100. As shown in FIG. As shown in FIG. 12 , the Bowden cable 100 includes a flexible outer cable 101 and an inner wire 102 passing through the outer cable 101 . The outer cable 101 has a first end 103 and a second end 104 . A connection terminal 105 that surrounds the first end 103 in the circumferential direction is attached to the tip of the first end 103 . The inner wire 102 can be displaced along the outer cable 101 inside the outer cable 101 . Both ends of the inner wire 102 extend from the first end 103 and the second end 104 of the outer cable 101, respectively. An engaging terminal 106 is attached to the end of the inner wire 102 that extends from the second end 104 .

A first end 103 of the Bowden cable 100 is connected to the bridge portion 75 with the inner wire 102 extending into the interior of the bridge portion 75 . Specifically, in the bridge portion 75 , a through hole is formed in the side portion (right side portion) of the bridge portion 75 to allow communication between the outside and the inside of the bridge portion 75 . The connection terminal 105 is fixed to the bridge portion 75 with the tip of the connection terminal 105 inserted into the through hole.

As shown in FIG. 10 , the second end 89 of the link member 85 is connected to the end of the inner wire 102 that extends from the first end 103 . Specifically, the inner wire 102 is arranged to pass through the gap 91 (see FIG. 14) of the second end portion 89 on the base end side of the second portion 87 with respect to the screw hole 92 . Then, when the screw 96 is inserted into the screw hole 92 and tightened, the distance between the two branches of the second end portion 89 is reduced, and the two branches sandwich the inner wire 102 . Thereby, the second end 89 and the end of the inner wire 102 are connected. However, the second end 89 and the end of the inner wire 102 may be connected in any form.

As shown in FIG. 10 , the second end 104 of the Bowden cable 100 is connected to the right side portion of the cover body 34 with the inner wire 102 extending through the through hole of the cover body 34 and into the interior of the cover body 34 . connected to Specifically, the end of second end 104 is secured within a boss of cover body 34 . The connection point between the cover main body 34 and the second end portion 104 is located slightly above the upper edge portion 29 of the auxiliary cover portion 22 in the vertical direction.

As shown in FIG. 10, the inner surface of the right portion of the cover main body 34 is formed with a concave portion 34b recessed toward the right side. An engaging member 93 that conforms to the shape of the recess 34b is slidably arranged in the recess 34b. According to this configuration, the engaging member 93 can be held by the cover body 34 with a simple configuration. The engaging member 93 is positioned slightly above the upper edge portion 29 of the auxiliary cover portion 22 in the vertical direction. As shown in FIG. 15, the engaging member 93 has a hollow cubic shape with one of its six faces completely open. In addition, a notch 94 is formed on the other surface to allow communication between the inside and the outside of the engaging member 93 . The notch 94 extends from the open face in a direction orthogonal to the open face.

As shown in FIG. 10 , an engagement member 93 is connected to the end of the inner wire 102 extending from the second end 104 inside the cover body 34 . Specifically, the engaging terminal 106 of the inner wire 102 is inserted into the inner space of the engaging member 93 from the open surface of the engaging member 93 so that the inner wire 102 passes through the notch 94 . Since the engaging terminal 106 has a size larger than the width of the notch 94 , the end of the inner wire 102 is connected to the engaging member 93 in such a manner as to prevent it from coming off. However, the end portion of the inner wire 102 and the engaging member 93 may be connected in any form.

A compression spring 97 is arranged between the bottom of the recess 34 b (the left surface of the right portion of the cover body 34 ) and the engaging member 93 . The compression spring 97 always urges the engaging member 93 toward the left side (toward the inside of the cover body 34). Therefore, in the initial state, the engaging member 93 is held at the position shown in FIG.

As described above, the Bowden cable 100 connecting the link member 85 and the engaging member 93 is prevented from passing inside the bases 72 and 73 and around the support shaft 76 as shown in FIG. The outer cable 101 is arranged so as not to pass through the inside of the wall chaser 10 (in other words, so as to pass only through the outside of the wall chaser 10). Also, the Bowden cable 100 is arranged with the outer cable 101 bent 180 degrees from the first end 103 to the second end 104 . The Bowden cable 100 is arranged on the right side of the cover body 34 (in other words, on the same side as the motor housing 32 (motor 41)) in the left-right direction (the direction in which the rotation axis AX2 extends). Therefore, the Bowden cable 100 does not protrude leftward from the left side portion of the cover body 34 .

The lock operating member 81 described above interlocks with the engaging member 93 via the link member 85 and the inner wire 102 of the Bowden cable 100 to achieve the top dead center locking function. Specifically, as shown in FIGS. 8 and 10, when the lock operation member 81 is in the lock position, a portion (left side portion) of the engaging member 93 protrudes leftward from the recess 34b. At this time, the upper edge portion 29 of the auxiliary cover portion 22 is positioned right below the projecting portion of the engaging member 93 . Therefore, even if the user applies a downward force to the second handle 70 to displace the body portion 30 from the top dead center toward the bottom dead center, the recess 34 b of the engagement member 93 protrudes. Since the part engages (abuts) the upper edge 29, such displacement is prevented.

On the other hand, when the user grips the lock operation member 81 and rotates the lock operation member 81 from the lock position (FIG. 10) to the unlock position (FIG. 11), as shown in FIG. 83 contacts (engages) the first end 88 of the link member 85 and presses the first end 88 away from the lock operation member 81 . As a result, the link member 85 rotates against the biasing force of the compression spring 95 . As a result, the second end 89 rotates leftward and pulls the inner wire 102 connected to the second end 89 leftward. Thus, the link member 85 converts the rotational displacement of the lock operation member 81 from the locked position to the unlocked position into displacement of the inner wire 102 along the outer cable 101 .

As the inner wire 102 is pulled by the second end portion 89, the engaging member 93 connected to the inner wire 102 is pulled rightward. As a result, as shown in FIGS. 9 and 11, the engaging member 93 moves to the right against the biasing force of the compression spring 97 and is completely housed in the recess 34b. In other words, the engaging member 93 is retracted to a position where it does not interfere (engage) with the upper edge portion 29 of the auxiliary cover portion 22 . Therefore, displacement of the body portion 30 from the top dead center to the bottom dead center is allowed.

When the user releases the gripping operation of the lock operation member 81, the link member 85, the inner wire 102 and the engaging member 93 are moved from the position shown in FIG. 11 to the position shown in FIG. Return to position. When the body portion 30 is at a position other than the top dead center, the engaging member 93 contacts the right side surface of the auxiliary cover portion 22 when the lock operation member 81 is released. When the body portion 30 is swung up and down, the tip of the engaging member 93 slides on the surface of the right side surface of the auxiliary cover portion 22 . When the body portion 30 is returned to the top dead center, the engaging member 93 reaches above the upper edge portion 29 and is automatically locked by the bias of the compression spring 95 .

According to the wall chaser 10 described above, the engagement member 93 interlocks with the displacement of the lock operation member 81 between the lock position and the unlock position via the inner wire 102 of the Bowden cable 100 . Since the Bowden cable 100 can bend (or flex) in accordance with the rotation of the second grip portion 71 of the second handle 70, it can be adapted to the rotational movement of the second handle 70 (second grip portion 71). The displacement force of the lock operating member 81 can be transmitted to the engaging member 93 without being affected. Therefore, even in the wall chaser 10 having a rotary movable handle (second handle 70), the top dead center locking function can be easily realized. In other words, it is possible to easily achieve both the rotary movable handle and the top dead center lock function.

Further, since the link member 85 is interposed between the lock operation member 81 and the inner wire 102, the direction of action of the displacement force of the lock operation member 81 can be changed to the direction of action of the displacement force of the engaging member 93 with greater freedom. can be converted in degrees. Therefore, the displacement direction of the lock operation member 81 can be easily set so that the user can easily operate it manually. For example, as in the above-described embodiment, the lock operation member 81 can be moved to the lock operation member 81 so that the user can easily grip the lock operation member 81 with the hand that grips the second grip portion 71 . can be configured to rotate about a rotation axis parallel to the second grip 71 . In particular, since the link member 85 has a substantially L shape extending inside the second grip portion 71 and inside the bridge portion 75, such a configuration can be easily realized.

In addition, since the outer cable 101 of the Bowden cable 100 is arranged so as not to pass through the inside of the wall chaser 10, it is not necessary to bend the outer cable 101 complicatedly. Therefore, the inner wire 102 can be smoothly displaced within the outer cable 101 . Alternatively, there is no need to design the wall chaser 10 to fit the bending limits of the outer cable 101 . Furthermore, the outer cable 101 is bent 180 degrees from the first end 103 to the second end 104 . That is, the outer cable 101 is not complicatedly bent. Therefore, the inner wire 102 can be smoothly displaced within the outer cable 101 . In addition, since the outer cable 101 has a simple curved shape, the outer cable 101 is less likely to interfere with the carrying of the wall chaser 10 and the grooving work.

Also, the Bowden cable 100 is arranged so as not to pass around the rotation axis of the second handle 70 (that is, inside the bases 72 and 73 of the second handle 70 and around the support shaft 76). Therefore, the displacement force of the lock operating member 81 can be transmitted to the engaging member 93 with a simple structure.

The Bowden cable 100 is arranged on the same side (right side) as the gear housing 31 , motor housing 32 (motor 41 ), and rear housing 33 with respect to the cover body 34 . That is, the Bowden cable 100 is not positioned to the left of the cover body 34 . Therefore, for example, when grooving a wall in the vicinity of the ceiling, the wall chaser 10 is placed on the wall so that the left side of the cover body 34 is closer to the ceiling than the right side of the cover body 34, and the groove is cut. By cutting, a groove can be formed in the vicinity of the ceiling without the Bowden cable 100 interfering with the ceiling.

Further, since the engaging member 93 engages with the upper edge portion 29 of the auxiliary cover portion 22 extending upward (the side approaching the main body portion 30) from the base 21, the base 21 and the engaging member 93 engage. The extension distance of the outer cable 101 can be shortened compared to the case where the two are engaged. Moreover, the shape of the engaging member 93 can be simplified. However, the engaging member 93 may engage the base 21 or any portion fixed to the base 21 .

Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and do not limit the present invention. The present invention may be modified and improved without departing from its spirit, and the present invention includes equivalents thereof. In addition, any combination or omission of each element described in the claims and specification within the range that at least part of the above problems can be solved or at least part of the effect is achieved It is possible.

For example, the direction of rotation of the second handle 70 may be arbitrarily changed according to the layout design of the wall chaser 10 . Further, the lock operation member 81 is not limited to a rotary type, and can be deformed into any form displaced in any direction. For example, instead of the rotary lock operation member 81, a slide lock operation member that displaces in the left-right direction may be employed.

Alternatively, the various interlocking operations described above between a plurality of members may be achieved by any mechanical configuration capable of achieving similar functions as long as the Bowden cable 100 is used, not limited to the configuration described above. . For example, when a sliding lock operation member displaceable in the left-right direction is employed, the link member 85 may be omitted and the lock operation member and one end of the inner wire 102 may be directly connected.

The arrangement of the Bowden cable 100 is not limited to the example described above, and the Bowden cable 100 may directly or indirectly connect the operating portion 82 and the engaging member 93 in an arbitrary route so as to be interlockable. For example, the Bowden cable 100 may be arranged so that part or all of the outer cable 101 passes through the inside of the wall chaser 10 (for example, inside the second handle 70, inside the annular portion 34a, inside the cover main body 34, etc.). .

Alternatively, instead of the cutting tools 49 and 50 (cutting tools for forming two rows of grooves), three or more cutting tools (cutting tools for forming three or more rows of grooves) may be used. Alternatively, a single cutting tool having two or more rows of cutting portions may be used.

Furthermore, the various embodiments described above are applicable not only to wall chasers but also to any plunge-type portable processing machines (for example, plunge circular saws, plunge routers, etc.).

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 each component of the present invention. The wall chaser 10 is an example of a "portable processing machine." Base 21 is an example of a "base". The contact surface 23 is an example of a "contact surface". The main body part 30 is an example of a "main body part." The top side of wall chaser 10 is an example of a "first side." The underside of wall chaser 10 is an example of a "second side." The cutting tools 49 and 50 are examples of "cutting tools". The rotation axis AX2 is an example of the "rotation axis". The motor 41 is an example of a "motor". The second handle 70 is an example of a "handle". The second grip portion 71 is an example of a "gripping portion." Top dead center is an example of a "first position." Bottom dead center is an example of a "second position." The lock operation member 81 is an example of a "lock operation member". The engaging member 93 is an example of an "engaging portion". Bowden cable 100 is an example of a "Bowden cable." The outer cable 101 is an example of an "outer cable", and the inner wire 102 is an example of an "inner wire". The first end 103 is an example of a "first end" and the second end 104 is an example of a "second end". The link member 85 is an example of a "link member." The first portion 86 is an example of a "first portion", and the second portion 87 is an example of a "second portion". Bases 72 and 73 are examples of "bases". The support shaft 76 is an example of a "support shaft". The bridge portions 74 and 75 are examples of "bridge portions". The cover main body 34 is an example of a "cover main body." The auxiliary cover portion 22 is an example of the "auxiliary cover portion". The upper edge 29 of the auxiliary cover portion 22 is an example of a "fixed portion" and an "edge of the first side of the auxiliary cover portion". The recess 34b is an example of a "recess".

DESCRIPTION OF SYMBOLS 10... Wall chaser 20... Base member 21... Base 22... Auxiliary cover part 23... Contact surface 24... Through hole 25... Annular part 26... Support shaft 27 ...Wheel 28...Protrusion 29...Upper edge 30...Main body 31...Gear housing 32...Motor housing 33...Rear housing 34...Cover body 34a... Annular part 34b... Recessed part 35... Arrow 36... Annular part 37... Through hole 38... Cutting depth adjusting mechanism 39... Through hole 41... Electric motor 42... Motor Shaft 43...Small bevel gear 44...Large bevel gear 45...Spindle 46...Inner flange 47...Lock nut 48...Spacer 49, 50...Cutting tool 51...Battery mounting part 54 ...Battery 60...First handle 61...First grip 62...Operating member 70...Second handle 71...Second grip 72, 73... Base 74, 75 Bridge 76 Support shaft 77 Hexagonal nut 78 Boss 79 Knob 81 Lock operation member 82 Operation part 83 Protrusion 84 ...shaft 85...link member 86...first portion 87...second portion 88...first end 89...second end 90...shaft Part 91...Gap 92...Screw hole 93...Engaging member 94...Notch 95...Compression spring 96...Screw 97...Compression spring 100...Bowden cable 101.. Outer cable 102 Inner wire 103 First end 104 Second end 105 Connection terminal 106 Engagement terminal AX1 Rotation axis AX2 rotation axis

Claims (10)

A portable processing machine,
a base having a contact surface for contacting the workpiece;
a body portion arranged on a first side with respect to the base in a direction perpendicular to the contact surface;
The main body is
a motor configured to provide a rotational drive force to the cutting tool about the axis of rotation;
A handle having a grip, wherein the handle is configured such that a fixed position of the grip can be changed rotationally,
The body has a first position where the cutting tool is located on the first side with respect to the base and a second position where the cutting tool is partially beyond the base on a second side opposite the first side. a second position projecting into the base and displaceable with respect to the base;
The body further comprises:
A lock operation member disposed adjacent to the grip portion, the lock operation member having a lock position for locking the body portion in the first position, and a lock position from the first position to the second position of the body portion. a lock operating member manually displaceable between an unlocked position for allowing displacement to
a displaceable engagement member;
a Bowden cable having an outer cable having a first end and a second end opposite the first end; and an inner wire passing through the outer cable;
The lock operation member and the engagement member are configured to interlock at least via the inner wire,
The portable processing machine includes:
When the lock operation member is in the lock position, the engagement member engages with the base or a fixed portion that is a portion other than the base whose position relative to the base is fixed, thereby is prevented from being displaced from said first position to said second position;
When the lock operation member is in the unlocked position, the engaging member does not engage with the base or the fixed portion, and displacement of the main body from the first position to the second position is permitted. A portable processing machine configured to. The portable processing machine according to claim 1,
a link member housed inside the handle and connected to the inner wire, the link member engaging with the lock operation member at least when the lock operation member is in the unlocked position;
The portable processing machine, wherein the lock operating member and the engaging member are interlocked via at least the inner wire and the link member. The portable processing machine according to claim 2,
The portable processing machine, wherein the lock operation member is configured to rotate between the lock position and the unlock position about a rotation axis parallel to the gripping portion. The portable processing machine according to any one of claims 1 to 3,
The main body includes a spindle that rotatably supports the handle,
The handle includes a base portion through which the support shaft passes, and a bridge portion that connects the base portion and the grip portion so that a gap is formed between the base portion and the grip portion,
The portable processing machine, wherein the Bowden cable is arranged so as to pass neither through the base nor around the spindle. The portable processing machine according to claim 4, which includes claim 3 as a dependent source,
The first end of the outer cable is connected to the bridge so that the inner wire can pass through the bridge,
The link member has a first portion that extends inside the grip portion and engages with the lock operation member, and a second portion that extends inside the bridge portion and is connected to the inner wire. A portable processing machine having a substantially L-shaped shape. A portable processing machine according to any one of claims 1 to 5,
The portable processing machine, wherein the outer cable is arranged so as not to pass through the interior of the portable processing machine. The portable processing machine according to claim 6,
the first end of the outer cable is connected to the handle with the inner wire extending to the inside of the handle;
the second end portion of the outer cable is connected to a portion of the body portion other than the handle in a state in which the inner wire extends to the inside of the portion of the body portion other than the handle;
The portable processing machine, wherein the outer cable is bent 180 degrees from the first end to the second end. The portable processing machine according to any one of claims 1 to 7,
The portable processing machine is a wall chaser,
The body portion includes a cover body that partially covers the cutting tool,
The portable processing machine extends from the base toward the first side and extends toward the second side of the cutting tool relative to the cover body when the body portion is at the first position. Equipped with an auxiliary cover part that covers the part of
The first end of the outer cable is connected to the cover body with the inner wire extending to the inside of the cover body,
The fixed portion is the edge portion of the first side of the auxiliary cover portion, the portable processing machine. The portable processing machine according to claim 8,
The engaging member is
connected to the inner wire inside the cover body,
arranged to slide within a recess formed in the inner surface of the cover body,
Portability processing configured such that when the lock operation member is in the lock position, it partially protrudes from the recess, and the protruding portion engages with the edge of the first side of the auxiliary cover portion. machine. The portable processing machine according to claim 8 or claim 9,
The portable processing machine, wherein the Bowden cable is arranged on the same side as the motor with respect to the cover body in the direction in which the rotation axis of the cutting tool extends.

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