CN113492351A

CN113492351A - Portable cutting machine for stonemason

Info

Publication number: CN113492351A
Application number: CN202011479414.9A
Authority: CN
Inventors: 大河内克己
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2020-03-18
Filing date: 2020-12-15
Publication date: 2021-10-12
Also published as: JP2021151765A; BR102021002058A2

Abstract

The invention provides a portable cutting machine for a stonemark. The cutting machine (1) is provided with a rotary cutter (11); a cutter body (10) that rotatably supports a rotary cutter (11); and a fixed cover (12) which is mounted on the cutter body (10) and covers the periphery of the rotary cutter (11). The fixing cover (12) has: a water injection port (54) for injecting a liquid such as a cutting fluid into a cutting portion of the rotary cutter (11); a detachable unit (50) that communicates with the water inlet (54) and can supply liquid to the water inlet (54); and a support portion (50a) that supports the detachable portion (50). The detachable section (50) can detach and attach the nozzle (60) connectable to a tap water hose without using a tool. Accordingly, it is possible to provide a portable cutting machine for stonemark, which is required in the related art, and which can be easily connected to a supply source such as water injected into a cutting site and can be easily disconnected from the supply source.

Description

Portable cutting machine for stonemason

Technical Field

The present invention relates to a portable cutting machine for stonemarks for cutting materials to be cut such as stones.

Background

A portable cutting machine for a mason is generally called a cutting tool (cutter), and is used for cutting a material to be cut such as a stone. The portable cutter for stonemark comprises: a base abutting against an upper surface of a material to be cut; a cutter body supported on the upper surface of the base and accommodating the electric motor; and a circular rotary tool called a diamond wheel, which is rotated by an electric motor. In a state where the base is brought into contact with the upper surface of the material to be cut, the operator moves the portable cutting machine for a stonemark in the cutting direction and causes the rotary cutter to cut into the material to be cut. This enables the material to be cut. As a portable cutting machine for stonemarks, there is known a wet portable cutting machine for stonemarks, which cuts a material to be cut while injecting a liquid such as water into a cutting portion during cutting.

A water tank for supplying water, for example, is attached to the wet-type portable cutting machine for stoneware. Patent documents 1 and 2 disclose portable cutting machines for stonemark, to which a water tank can be attached. The water tank of the portable cutting machine for stonemark disclosed in patent document 1 is attached to the cutting machine main body by screw fastening. Therefore, a tool for disassembling and assembling the water tank needs to be additionally prepared. The water tank of the portable stonemark cutting machine disclosed in patent document 2 can be attached to and detached from the cutting machine main body without using a tool.

Since the amount of water that can be stored in the water tank is limited, the water tank needs to be removed to replenish water, etc., whenever the water tank becomes empty. Therefore, there is a demand for a portable cutting machine for stonemark that can supply water for a long time or in a large amount. Patent document 3 discloses a portable cutter for stonemarks to which a hose for tap water can be attached. However, in order to attach and detach the hose for water supply, a separate tool needs to be prepared, and there is room for improvement in the attachment and detachment properties. Further, for example, a tool-less attaching and detaching structure disclosed in patent document 2 is designed according to the amount of water in the tank, the shape of the opening, and the like. Therefore, it is not easy to attach or detach a hose for tap water or the like that can supply a large amount of water or the like for a long time.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent application laid-open No. 2013-82104

[ patent document 2] European patent application publication No. 2236234 Specification

[ patent document 3] Japanese patent laid-open publication No. 2017-217794

Disclosure of Invention

[ problem to be solved by the invention ]

Therefore, there is a need for a portable cutting machine for stonemarks that can be easily connected to a supply source such as water injected into a cutting site and can be easily disconnected from the supply source.

[ solution for solving problems ]

According to one feature of the present disclosure, a portable cutter for stonemark has: rotating the cutter; a cutter body that rotatably supports a rotary cutter; and a fixed cover which is mounted on the cutter main body and covers the periphery of the rotary cutter. The fixing cover has: a water injection port for injecting a liquid such as a cutting fluid into the cutting site; a detachable section that communicates with the water filling port and can supply liquid to the water filling port; and a support portion that supports the detachable portion. The detachable section can detach and attach the nozzle connectable to the hose for tap water without using a tool.

Therefore, a hose for running water, which can supply a liquid such as water for a long time or in a large amount, can be easily connected to the fixed cover. Further, the water hose can be easily detached from the fixing cover without using a tool. Therefore, the workability of attaching and detaching the tap water hose to and from the portable cutter for stonemark is improved.

According to other features of the present disclosure, the detachable portion can selectively connect the nozzle and the tank storing the liquid. Therefore, the nozzle and the tank connected to the tap water hose can be selected according to the application. When a liquid such as water is supplied for a long time or in a large amount, the nozzle can be attached to the detachable portion and used. When the amount of water or the like used is small or when it is difficult to extend the hose for tap water in a work place, the water tank can be used by being attached to the detachable portion. Accordingly, the portable cutting machine for stonemarks is excellent in usability.

According to another feature of the present disclosure, the nozzle has a nozzle-side detachable portion detachable from the detachable portion. The tank has a tank-side detachable portion detachable from the detachable portion. The nozzle-side detachable portion and the tank-side detachable portion have the same shape. Therefore, the nozzle and the tank connected to the tap water hose can be selected according to the application without requiring a tool for attachment or a complicated operation, and can be attached to and detached from the attachment/detachment portion.

According to other features of the present disclosure, the cutter body is grasped by a user located at the rear. The detachable part is arranged in front of the fixed cover. Therefore, the detachable portion is provided at a position away from the user and close to a portion where the rotary cutter starts cutting (cutting start portion). Therefore, water or the like is easily injected into the cutting start portion. Chips are easily generated at the cutting start portion. Therefore, by injecting water or the like into the cutting start portion, chips can be effectively removed from the rotary cutter. In addition, resistance at the cutting start portion during cutting tends to increase and heat tends to be generated. Therefore, by injecting water or the like into the cutting start portion, the rotary cutter can be cooled efficiently.

According to another feature of the present disclosure, the detachable portion has a support portion inclined rearward as it goes upward. Therefore, the nozzle or the tank attached to the detachable portion is inclined upward toward the user. Therefore, the user can easily attach and detach the nozzle or the water tank. Further, the hose for water supply connected to the nozzle can be extended rearward without interfering with the cutting direction.

According to another feature of the present disclosure, the portable cutter for stonemark has a split structure that is divided in a direction intersecting a direction of attachment and detachment of the nozzle to and from the attachment and detachment portion. The detachable portion can be exposed by disassembling the support portion into a half-opened state. Therefore, for example, when chips or the like enter the detachable portion, the support portion can be released into a half-open state to expose the detachable portion. This makes it easy to clean the detachable portion, and prevents clogging with chips and the like.

According to another feature of the present disclosure, the detachable portion includes: an engagement claw which protrudes inward in the radial direction of the detachable section and is displaceable in the radial direction of the detachable section; and a biasing member that biases the engaging claw radially inward of the detachable portion. An outer circumference concave part and a guide surface are arranged on the outer circumference of the nozzle, wherein the outer circumference concave part is engaged with the engaging claw in a concave-convex manner; the guide surface is disposed closer to the end of the nozzle than the outer circumferential recessed portion. The guide surface is inclined radially outward from the end portion side of the nozzle toward the base portion side.

Therefore, when the nozzle is pushed into the detachable portion, the guide surface causes the engagement claw to retreat outward in the radial direction of the detachable portion against the biasing force of the biasing member. This enables the nozzle to further enter the detachable portion. When the guide surface is more advanced toward the depth of the detachable portion than the engaging claw, the retracted engaging claw is urged by the urging member to protrude radially inward of the detachable portion. Accordingly, the engaging claw is engaged with the outer peripheral concave portion of the nozzle. In this way, the nozzle can be attached to the detachable portion only by the operation of pressing the nozzle into the detachable portion.

According to other features of the present disclosure, a portable cutter for stonemark has: a water supply path through which water can be supplied from the detachable portion to the water filling port; an opening/closing cock forming a part of the water supply path; and an opening/closing operation handle connected to the opening/closing cock and exposed to the outside of the detachable portion. The opening/closing cock and the opening/closing operation handle are rotatable about an axis extending across the water supply path. The water supply path is opened and closed by rotating an opening and closing cock. Therefore, the opening and closing of the water supply path can be switched only by rotating the opening and closing operation lever. And the opening/closing operation handle is exposed to the outside of the detachable part. Therefore, the water supply path can be opened and closed from the outside of the detachable portion. This makes it possible to improve the operability of the operation of opening and closing the water supply path.

According to other features of the present disclosure, the portable cutting machine for stonemarks has an illumination lamp that illuminates a cutting site on the cutting machine body. Therefore, it is easy to visually confirm whether or not the rotary cutter cuts the material to be cut. Further, it is easy to confirm whether or not the cutting fluid is properly sprayed from the water injection port to the cutting portion of the rotary cutter. Therefore, the work efficiency of cutting the material to be cut while injecting water to the cutting portion is improved.

According to other features of the present disclosure, a portable cutter for stonemark has: a base; and a rotation center shaft that supports the cutter body to be tiltable with respect to the base. The illumination lamp is disposed on the opposite side of the rotary cutter with the rotation center axis therebetween. Therefore, for example, the cutter body is inclined toward the rotary cutter about the rotation center axis. In the inclined posture, the illumination lamp is positioned above the rotary cutter on the opposite side of the rotary cutter with the rotation center axis therebetween. Therefore, the illumination lamp illuminates the cutting portion of the rotary cutter from above to below. Accordingly, the cut portion can be made excellent in visibility even in the inclined posture.

According to other features of the present disclosure, a portable cutter for stonemark has: rotating the cutter; a cutter body that rotatably supports a rotary cutter; and a fixed cover which is mounted on the cutter main body and covers the periphery of the rotary cutter. The fixing cover has: a water injection port for injecting a liquid such as a cutting fluid into the cutting site; a detachable section that communicates with the water filling port and can supply liquid to the water filling port; and a support portion that supports the detachable portion. The detachable part can be used for detaching and assembling a plastic bottle for commercial beverage. Therefore, as a supply source of the liquid to be injected, a commercially available plastic bottle for beverage, which is a container for beverage consumed by the general public at low cost and is easily available, can be used. Therefore, even when it is difficult to obtain a bottle dedicated to a cutter, a commercially available plastic bottle for beverages can be used, and a portable cutter for stonemark can be used in a wet manner. Further, by using a commercially available plastic bottle for beverages, a preferred volume corresponding to the usage state can be selected from a wide variety of volumes. Thus, a commercially available beverage plastic bottle which is inexpensive and convenient can be connected to the detachable portion, and a portable cutter for stonemark can be used.

According to another feature of the present disclosure, the portable cutter for stonemark has a fitting for attaching and detaching a commercially available plastic bottle for beverage to and from the attaching and detaching portion. A male screw is provided on the outer periphery of an opening of a commercial plastic bottle for beverages. An internal thread screwed with the external thread is arranged on the accessory. Therefore, the commercially available beverage plastic bottle can be easily attached to and detached from the attachment/detachment section via the metal fitting. Further, by screwing the male screw and the female screw, the commercially available plastic bottle for beverages can be easily connected to the metal fittings, and the connection can be easily released.

According to other features of the present disclosure, the accessory is separable into an end cap and an interface converter, wherein the end cap is provided to be engageable with the detachable portion; the interface adapter connects the end cap to a commercially available plastic beverage bottle. Therefore, commercially available plastic bottles for beverages of various shapes and sizes can be connected to the end caps through the interface converter. The end cap can be provided in the same shape as that of a nozzle-side detachable portion attached to an end portion of a water hose for running water or a tank-side detachable portion attached to a tank for storing liquid, for example. This enlarges the range of selecting the supply source of the liquid to be injected. Therefore, the portable cutting machine for stonemarks is convenient to use.

According to other features of the present disclosure, the interface converter has a bottle mount for mounting a plastic bottle for commercial beverages and an end cap mount for mounting an end cap. The diameter of the bottle mounting portion is greater than the diameter of the end cap mounting portion. Therefore, the opening of a commercial plastic bottle for beverages having a large opening diameter can be connected to the end cap via the mouthpiece switch.

According to other features of the present disclosure, a plastic bottle for commercial beverages has a hole in the bottom. Therefore, air can be let into the plastic bottle for commercial beverage from the hole. When the water level drops due to the pouring of water, which causes the liquid to flow out of a plastic bottle for commercial beverages, negative pressure is generated in the air in the bottle. The negative pressure can act as a brake to reduce the rate of water injection. Since air can freely flow into the plastic bottle from the hole, negative pressure can be prevented from being generated in the plastic bottle. Thus, water can be smoothly injected.

According to other features of the present disclosure, the water tank has a hole at a bottom. Therefore, air can be let into the water tank from the hole. Accordingly, water can be smoothly filled not only when a commercially available plastic bottle for beverages is used but also when a water tank is used.

Drawings

Fig. 1 is an overall perspective view of the cutter according to the present embodiment after a nozzle is attached.

Fig. 2 is a left side view of the cutter with the nozzle mounted.

Fig. 3 is a left side view of the cutter with the water tank mounted.

Fig. 4 is a right side view of the cutter.

Fig. 5 is a top view of the cutter.

Fig. 6 is a bottom view of the cutter.

Fig. 7 is a front view of the cutter.

Fig. 8 is a front view of the cutter that tilts the cutter main body to the right.

Fig. 9 is a rear view of the cutter with the rechargeable battery removed.

Fig. 10 is an exploded perspective view of the cutter.

Fig. 11 is a right side view of the fixed cover and nozzle of the cutter.

Fig. 12 is a right side view of the fixed cover and the nozzle of the cutter, and is a side view of the right half portion excluding the support portion.

Fig. 13 is a cross-sectional view taken along XIII-XIII in fig. 11, and is a longitudinal sectional view of the detachable portion and the nozzle when the opening/closing lever is in a closed state.

Fig. 14 is a cross-sectional view corresponding to XIII-XIII in fig. 11, and is a longitudinal sectional view of the detachable portion and the nozzle when the opening/closing lever is in an open state.

Fig. 15 is a cross-sectional view corresponding to XIII-XIII in fig. 11, and is a longitudinal sectional view of the detachable section and the nozzle when detached from the detachable section.

Fig. 16 is a left side view of the cutter with a fixing cover having a dust collection port attached.

Fig. 17 is a left side view of the cutter with the plastic bottle for beverage mounted.

Fig. 18 is an exploded perspective view of the cutter.

Fig. 19 is a longitudinal sectional view of the detachable portion to which the plastic bottle for beverages is attached.

[ description of reference numerals ]

1: a cutter (a portable cutter for stonemark); 2: a base; 3: a front side sway brace; 3 a: a left-right tilting fixing screw; 4: a rear side swing support; 5: a left-right tilt pivot (rotation center shaft); 6: swinging the fulcrum shaft up and down; 7: a depth guide; 8: swing up and down to fix the operation handle, 8 a: an operating stem; 10: a cutter body; 11: rotating the cutter; 12: fixing cover, 12 a: a screw fixing portion; 12 b: a hook portion; 13: a set screw; 14: an outer flange; 15: an inner flange; 16: a main shaft; 20: a motor housing; 20 a: an air inlet; 20 b: a rib; 21: an electric motor; 21 a: a motor shaft; 22: a gear case; 22 a: a reduction gear mechanism; 22 b: an exhaust port; 22 c: a cover mounting portion; 23: shaft locking; 24: a controller; 30: a handle housing; 30 a: a handle portion; 31: a switch operating handle; 32: an unlock button; 33: an illuminating lamp; 34: an interface converter mounting section; 35: a communication interface converter; 40: a battery mounting portion; 41: a rechargeable battery; 42: a hexagonal wrench; 43: a wrench mounting portion; 50: a detachable portion; 50 a: a support portion; 50 b: a water supply port; 50 c: an abutting portion; 50 d: a right split portion; 50 e: a left split portion; 50 f: mounting screws; 51: a water distribution pipe; 52: an opening and closing operation handle; 53: a cock is switched; 53 a: a through hole; 54: a water injection port; 55: detaching the button; 56: a clamping claw; 57: a compression spring (urging member); 58: a water supply path; 60: a nozzle; 61: nozzle side-mounting/dismounting portion: 61 a: an outer peripheral recess; 61 b: a valve seat; 61 c: a guide surface; 62: a hose mounting section; 63: a hose for tap water; 64: a tap water outlet; 65: a valve body; 65 a: an O-shaped ring; 65 b: a compression spring; 65 c: a recess; 70: a water tank; 70 a: an opening part; 70 b: an external thread; 70 c: an aperture; 70 d: a bottom; 71: a water tank side dismounting part; 71 a: an outer peripheral recess; 71 b: an internal thread; 80: a fixed cover; 80 a: a screw fixing portion; 81: a dust collection port; 90: plastic bottles (plastic bottles for commercial beverages, pet bottles); 90 a: an opening part; 90 b: an external thread; 90 c: an aperture; 90 d: a bottom; 91: an accessory; 92: an end cap (bottle side detachable portion); 92 a: an outer peripheral recess; 92 b: an internal thread; 92 c: a guide surface; 93 an interface converter; 93 a: an external thread; 93 b: an internal thread; 93 c: an end cap mounting section; 93 d: a bottle mounting portion; w: the material to be cut.

Detailed Description

Next, an embodiment of the present invention will be described with reference to fig. 1 to 19. As shown in fig. 1 and 2, a cutter (portable cutter for stonemark) 1 is generally called a cutting tool (cutter), and is used to cut a material to be cut such as a stone. The cutting machine 1 is a portable cutting machine that can perform a cutting operation by being held by one hand, for example. The wet type cutter 1 cuts the material W to be cut while injecting a liquid such as water into the cutting portion. The material W to be cut is mainly stone material including concrete, asphalt, brick, etc. The liquid such as water prevents scattering of chips generated during cutting and cools the cutting portion.

As shown in fig. 2, the cutter 1 includes a base 2 abutting on an upper surface of a workpiece W, and a cutter body 10 supported above the base 2. A rotary cutter 11 called a diamond whetstone is provided to the cutter body 10. The user is positioned on the right side in fig. 2 and grips the cutting machine 1. In the following description, the direction of cutting travel is defined as the front, and the opposite side, i.e., the user side, is defined as the rear. The left-right direction is determined based on the user.

As shown in fig. 1 and 2, the cutter body 10 is supported on the upper surface of the base 2 by the front roll support portion 3 provided at the front portion and the rear roll support portion 4 provided at the rear portion. The front roll support portion 3 and the rear roll support portion 4 each have a left-right roll pivot shaft (rotation center shaft) 5 extending in the front-rear direction. The yaw pivot axis 5 of the front roll support portion 3 and the yaw pivot axis 5 of the rear roll support portion 4 are coaxial with each other. The cutter body 10 can tilt left and right about the left and right tilt support shaft 5. For example, as shown in fig. 8, the cutter body 10 can be inclined to the right to about 45 °. By tilting the cutter body 10 left and right, the rotary cutter 11 can be tilted with respect to the lower surface of the base 2. The front tilt support portion 3 is provided with a left-right tilt fixing screw 3 a. The cutter body 10 can be tilted left and right by operating the left and right tilt fixing screws 3a in the screw loosening direction. By operating the right-left tilting fixing screw 3a in the screw tightening direction, the cutter body 10 can be fixed at a predetermined right-left tilting angle.

As shown in fig. 2, a vertical swing support shaft 6 extending in the horizontal direction is provided at the rear of the front tilt support portion 3. The cutter body 10 can swing up and down about the up-down swing support shaft 6. By vertically swinging the cutter body 10, the cutting depth of the rotary cutter 11 into the workpiece W can be adjusted.

As shown in fig. 2 and 5, a depth guide 7 for adjusting the depth of cut is provided at the rear of the base 2. The depth guide 7 extends in an arc shape along the circumferential direction of the vertical swing support shaft 6. A fixed operation handle 8 is provided to the depth guide 7 to swing up and down. The vertically swinging fixed operation lever 8 is rotatable about an operation lever shaft 8a extending to the left and right. The fixed operation lever 8 is swung up and down to fasten the depth guide 7 and a fixed cover 12 described later. The cutter body 10 can be swung up and down by operating the swing-up/down fixing operation handle 8 in the screw loosening direction. By operating the vertical swing fixing lever 8 in the screw tightening direction, the cutter body 10 can be fixed at a vertical swing angle that provides a predetermined depth of cut.

As shown in fig. 2, the cutter body 10 has a fixed cover 12. The fixed cover 12 covers the upper half circumference of the rotary cutter 11. The lower half-circumference of the rotary cutter 11 protrudes below the base 2. The cutter 1 is moved forward while rotating the rotary cutter 11, whereby the material W to be cut is cut by the protruding portion of the rotary cutter 11.

As shown in fig. 5 and 7, the cutter body 10 includes a cylindrical motor housing 20 and a gear case 22 adjacent to the motor housing 20. An electric motor 21 called a DC brushless motor is housed in the motor case 20. The motor shaft 21a of the electric motor 21 extends in the left-right direction. The motor housing 20 has a plurality of intake ports 20a at an end portion in the extending direction of the motor shaft 21 a. Around the plurality of intake ports 20a, ribs 20b are provided which slightly protrude in the extending direction (right direction) of the motor shaft 21 a. For example, when the cutter 1 is mounted with the motor housing 20 side down, the ribs 20b are provided to form a gap between the mounting surface and the air inlet 20 a. Accordingly, it is possible to prevent a large amount of chips from entering due to an excessive suction force generated when the motor case 20 is sucked to the mounting surface. Therefore, the entry of chips into the motor case 20 through the intake port 20a can be suppressed.

As shown in fig. 4 and 5, the cutter body 10 includes a controller 24 housed behind the electric motor 21. The controller 24 is formed by housing a control board in a box body of a shallow rectangular shape and resin-molding the control board. The controller 24 is housed in a posture in which the thickness direction (short-side direction) is along the vertical direction. The controller 24 is provided with a control circuit, a drive circuit, an automatic stop circuit, and the like. The control circuit is mainly constituted by a microcomputer for controlling the operation of the electric motor 21. The drive circuit is constituted by an FET that switches the current of the electric motor 21 based on a control signal received from the control circuit. The automatic stop circuit cuts off the power supply to the electric motor 21 so as not to be in an over-discharge or over-current state, based on the detection result of the state of the rechargeable battery 41 described later.

As shown in fig. 5 and 7, a plurality of exhaust ports 22b are provided in front of the gear case 22. The plurality of intake ports 20a and the plurality of exhaust ports 22b communicate via the inside of the motor housing 20 and the gear case 22. A cooling fan, not shown, is attached to the motor shaft 21 a. The cooling fan rotates together with the motor shaft 21a, thereby generating a flow of wind from the plurality of intake ports 20a to the plurality of exhaust ports 22 b. The electric motor 21 and the like are cooled by the flow of the wind.

As shown in fig. 7, a reduction gear mechanism 22a and a main shaft (output shaft) 16 rotated by the reduction gear mechanism 22a are housed in the gear case 22. The main shaft 16 extends in the left-right direction and is rotatably supported by the gear case 22. The rotation output of the motor shaft 21a of the electric motor 21 is reduced in speed by the reduction gear mechanism 22a and then transmitted to the main shaft 16. The left end side of the main shaft 16 protrudes into the fixed cover 12. On which a rotary cutter 11 is mounted.

As shown in fig. 6, the rotary cutter 11 is held between the outer flange 14 and the inner flange 15 in a posture orthogonal to the spindle 16 in a direction perpendicular to the surface (left-right direction). The clamped state of the rotary cutter 11 is locked by a fixing screw 13 fastened to the left end of the spindle 16. Accordingly, the rotary tool 11 is fixed so as not to be displaceable in the axial direction relative to the spindle 16 and not to be rotatable about the axis.

As shown in fig. 7, a shaft lock 23 is provided at the front of the gear case 22. The main shaft 16 is prevented from rotating by pressing the shaft lock 23 into the gear housing 22. Accordingly, the rotary cutter 11 can be removed from the spindle 16 and replaced by rotating the fixing screw 13 with the hexagonal wrench 42 or the like.

As shown in fig. 1, a handle case 30 is provided above the motor case 20 and the gear case 22 (see fig. 5). The handle housing 30 has a handle portion 30a for a user to grasp. The handle portion 30a is annular, extends upward and rearward from the front upper surface of the cutter main body 10, and is connected to the rear portion of the cutter main body 10. An anti-slip elastic resin layer is provided on the surface of the handle portion 30 a. As shown in fig. 4, a wrench mounting portion 43 to which the hexagonal wrench 42 can be mounted is provided at the rear portion of the handle portion 30 a.

As shown in fig. 4, a switch operation lever 31 is provided on the inner peripheral side of the handle portion 30 a. The switch operation handle 31 is provided to be operated by being clasped with fingers in a state where the user grips the handle portion 30 a. When the toggle switch lever 31 is operated, the electric motor 21 is started to rotate the rotary cutter 11. An unlock button 32 is provided on an upper portion of the handle portion 30 a. The switch lever 31 is locked in a normal state and cannot be operated by being locked. The unlocking button 32 is horizontally pushed rightward or leftward to release the locked state of the switch lever 31 at the off position, whereby the switch lever 31 can be operated to be locked. When the click operation of the switch lever 31 is released, the switch lever 31 automatically returns to the unlock state. As shown in fig. 7, the left and right unlock buttons 32 have a cylindrical shape at their portions projecting left and right from the handle portion 30a, and have a cutout shape at their upper portions facing left and right outer sides with respect to the lower portions, and have a planar shape with the upper portions inclined. Therefore, the front end surface of the user's fingertip easily and easily abuts against the inclined flat portion of the unlock button 32. The left and right unlock buttons 32 are integrated with each other by an intermediate portion thereof, and are horizontally movable in the left-right direction. The user can move the unlock button 32 in the left-right direction without discomfort while applying a slight downward force, without strictly moving the unlock button 32 horizontally in the left-right direction, by pressing the inclined flat surface portion of the upper portion of the unlock button 32.

As shown in fig. 7, an illumination lamp 33 is provided at the front of the handle case 30. The illumination lamp 33 is, for example, a Light Emitting Diode (LED). The switch operation lever 31 is turned on by being pulled, and the illumination lamp 33 is turned on. The illumination lamp 33 illuminates the cutting portion of the rotary cutter 11. In a so-called straight-cut posture in which the rotary cutter 11 is orthogonal to the lower surface of the base 2, the illumination lamp 33 is positioned on the right side of the yaw support shaft 5. On the other hand, the rotary cutter 11 is located leftward from the yaw support shaft 5 in the straight-cut posture. Therefore, the illumination lamp 33 irradiates the cutting portion of the rotary cutter 11 located on the lower left side in the straight cutting. As shown in fig. 8, when the cutter body 10 is tilted to the left side for beveling, the illumination lamp 33 irradiates the cutting portion of the rotary cutter 11 located below from above.

As shown in fig. 4, a concave interface converter mounting portion 34 is provided on a side portion of the handle case 30. The communication interface converter 35 can be inserted into and mounted on the interface converter mounting portion 34. The communication interface converter 35 is capable of wireless communication with other attached devices. The cutting machine 1 can be interlocked with the start operation and stop operation of the attached equipment by wireless communication. The communication interface converter 35 can, for example, link a dust collector provided separately from the cutter 1 and the cutter 1.

As shown in fig. 2 and 9, a battery mounting portion 40 is provided at the rear of the cutter body 10. The mounting surface of the battery mounting portion 40 faces rearward. The rechargeable battery 41 can be slidably mounted on the battery mounting portion 40 along the mounting surface of the battery mounting portion 40. The rechargeable battery 41 has a substantially rectangular box shape. The rechargeable battery 41 is, for example, a lithium ion battery having an output voltage of 18V. The rechargeable battery 41 can be repeatedly charged and can be detached from the battery mounting portion 40, and charging can be performed by a separately prepared charger. The rechargeable battery 41 can be repeatedly used as a power source for other rechargeable power tools such as a screw driver and an electric drill.

As shown in fig. 10, the fixed cover 12 is detachable from a side portion of the gear case 22. The gear case 22 has a flat plate-like cover mounting portion 22c extending in the front-rear direction. A screw fixing portion 12a is provided on the left side of the fixing cover 12. As shown in fig. 11 and 12, a plurality of hook portions 12b bent into a hook shape are provided around the right side portion of the fixed cover 12. The hook portion 12b is hooked on the cover attachment portion 22c, and the screw fixing portion 12a and the cover attachment portion 22c are fastened by a screw. Thereby fixing the stationary cover 12 to the gear case 22.

As shown in fig. 2 and 10, a detachable portion 50 to which a nozzle 60 or a water tank 70 described later can be attached and detached is provided at the front portion of the fixed cover 12. A cylindrical support portion 50a for supporting the detachable portion 50 from the outside is provided at an upper portion of the detachable portion 50. The support portion 50a extends obliquely rearward as it goes upward, and has an open upper end. As shown in fig. 7, the support portion 50a has a left-right split structure that can be divided into a right split portion 50d and a left split portion 50 e. The right and

left split portions

50d and 50e are connected to each other by a plurality of mounting screws 50 f. The right and

left split portions

50d and 50e can be separated by removing the plurality of mounting screws 50 f. By separating the right half-open portion 50d and the left half-open portion 50e, the inside of the detachable portion 50 can be exposed. As shown in fig. 15, a water supply port 50b and an abutting portion 50c annularly surrounding the periphery of the water supply port 50b are provided at the bottom of the detachable portion 50 on the inner circumferential side. The water supply port 50b extends downward in a tubular shape, and allows a cutting fluid such as water to flow downward.

As shown in fig. 13, an opening/closing cock 53 is provided below the water supply port 50 b. The opening/closing cock 53 is integrally connected to an opening/closing operation lever 52 exposed to the outside of the fixed cover 12. The opening/closing cock 53 and the opening/closing operation handle 52 are supported by the fixed cover 12 so as to be rotatable about an axis extending in the left-right direction. The insertion hole 52a penetrates the center of the opening/closing cock 53. A water distribution pipe 51 is provided below the opening/closing cock 53. The water distribution pipe 51 extends substantially downward. A water injection port 54 is opened at an end of the water distribution pipe 51. A water supply path 58 through which the cutting fluid can be supplied from the upper portion of the detachable unit 50 to the water injection port 54 is formed by the water supply port 50b, the insertion hole 53a for opening and closing the cock 53, and the water distribution pipe 51. As shown in fig. 6, the water filling port 54 is opened to the side surface of the front lower portion of the rotary cutter 11 corresponding to the cutting start position.

The opening/closing operation lever 52 is rotated to the closed position as shown in fig. 13. Accordingly, the through hole 53a extends in a direction intersecting the extending direction of the water supply port 50b and the water distribution pipe 51. Therefore, the water supply path 58 between the water supply port 50b and the water distribution pipe 51 is cut off by opening and closing the cock 53. The opening/closing operation lever 52 is rotated to the open position as shown in fig. 14. Accordingly, the through hole 53a extends in the extending direction of the water supply port 50b and the water distribution pipe 51. Thereby, the through-hole 53a connects the water supply path 58 between the water supply port 50b and the water distribution pipe 51. This enables water to be supplied from the water supply port 50b to the water filling port 54 through the insertion hole 53a and the water distribution pipe 51.

As shown in fig. 13, an engagement claw 56 is provided on the inner peripheral side of the detachable portion 50. A removal button 55 is provided on the outer peripheral side of the removal portion 50. The engaging claw 56 and the removal button 55 are integrally connected. The engagement claw 56 has a convex shape protruding radially inward of the attachment/detachment portion 50. The convex portion of the engagement claw 56 has a rectangular cross-sectional shape that engages with an outer peripheral concave portion 61a of a nozzle-side detachable portion 61 described later. The engagement claw 56 is supported by the detachable section 50 so as to be movable in the radial direction of the detachable section 50. A compression spring (urging member) 57 is provided between the engagement claw 56 and the inner peripheral wall of the detachable portion 50. The engagement claw 56 is biased radially inward of the detachable section 50 by a compression spring 57. As shown in fig. 15, when the removal button 55 is pressed, the engagement claw 56 is displaced outward in the radial direction of the removal portion 50 against the urging force of the compression spring 57.

As shown in fig. 1, a nozzle 60 connected to a hose 63 for tap water can be attached to the detachable portion 50. As shown in fig. 2 and 5, the nozzle 60 attached to the detachable portion 50 is inclined rearward as it goes upward. As shown in fig. 3, a water tank 70 for storing a liquid such as water can be attached to the detachable portion 50. The longitudinal direction of the water tank 70 attached to the detachable portion 50 is inclined rearward as it goes upward. Thus, the nozzle 60 and the water tank 70 shown in fig. 10 can be selectively and appropriately attached to the detachable portion 50.

As shown in fig. 1, the nozzle 60 has: a nozzle-side detachable portion 61 that is cylindrical and detachable from the detachable portion 50; and a hose attachment portion 62 that can be connected to one end of a tap water hose 63. The other end of the tap water hose 63 is connected to a tap water outlet 64, for example. A pipe passage through which a liquid such as water can flow is formed inside the nozzle 60, extending from the end of the hose attachment portion 62 to the end of the nozzle-side attachment portion 61. As shown in fig. 10, the tank-side detachable portion 71 is attached to a tank 70 capable of storing liquid such as water. The nozzle-side attaching/detaching portion 61 and the tank-side attaching/detaching portion 71 have the same structure and are provided in the same shape. In the following description, only the structure of the nozzle-side removing portion 61 will be described in detail.

As shown in fig. 10, a groove-like outer peripheral recess 61a (outer peripheral recess 71a) is provided on the outer peripheral surface of the cylindrical nozzle-side detachable portion 61 (tank-side detachable portion 71). The outer peripheral recess 61a extends in the circumferential direction of the nozzle-side attaching and detaching portion 61 and is recessed over the entire circumference. The outer peripheral recess 61a is provided at a predetermined distance from the end of the nozzle-side attaching/detaching portion 61. Specifically, as shown in fig. 13, the outer peripheral recess 61a is recessed at a position that is aligned with the engagement claw 56 when the end of the nozzle-side removing portion 61 is brought into contact with the contact portion 50 c. The outer peripheral concave portion 61a is recessed in a rectangular cross-sectional shape to be engaged with the convex portion of the engaging claw 56. A guide surface 61c is provided on the outer periphery of the end of the nozzle-side attaching/detaching portion 61. The guide surface 61c is provided on the end portion side (lower side in the drawing) of the nozzle-side attaching/detaching portion 61 with respect to the outer peripheral recessed portion 61 a. The guide surface 61c extends in a conical surface shape obliquely outward in the radial direction from the end portion side of the nozzle-side attaching/detaching portion 61 toward the base portion side (upper side in the drawing).

As shown in fig. 13, a valve body 65 and a compression spring 65b are provided inside the nozzle-side attaching/detaching portion 61. The valve body 65 is a column extending in the longitudinal direction of the nozzle-side attaching/detaching portion 61. The valve body 65 has an O-ring 65a on the base side (upper side in the figure) of the nozzle-side removing part 61. The valve body 65 has a recess 65c recessed radially inward at a position closer to an end portion (lower side in the drawing) of the nozzle-side attaching/detaching portion 61 than the O-ring 65 a. The compression spring 65b is disposed on the outer periphery of the valve body 65 below the recess 65 c. The valve body 65 is biased downward by a compression spring 65 b. A small diameter portion is provided on the inner peripheral portion of the nozzle-side attaching/detaching portion 61. A valve seat 61b capable of being in water-tight contact with the O-ring 65a is provided on the upper portion of the small diameter portion.

As shown in fig. 15, when the nozzle-side removing portion 61 is not attached to the removing portion 50, the O-ring 65a of the valve body 65 abuts against the valve seat 61b to close the opening of the nozzle-side removing portion 61. Therefore, water supplied from the tap water hose 63 (see fig. 1) attached to the hose attachment portion 62 to the end portion of the nozzle-side detachable portion 61 is cut off. As shown in fig. 13, the nozzle-side detachable portion 61 is pushed into the detachable portion 50. When the guide surface 61c moves laterally of the engagement claw 56, the guide surface 61c pushes the engagement claw 56 outward in the radial direction of the attachment/detachment portion 50 against the urging force of the compression spring 57. The guide surface 61c is inclined so that a base portion side rearward in the entering direction protrudes radially outward from an end portion side forward in the entering direction. Therefore, the engagement claw 56 is retracted outward in the radial direction of the detachable portion 50 along the guide surface 61 c.

When the nozzle-side attaching/detaching portion 61 is inserted into the attaching/detaching portion 50, the outer peripheral concave portion 61a located rearward in the insertion direction with respect to the guide surface 61c moves laterally of the engaging claw 56. The engagement claw 56 is biased radially inward of the detachable section 50 by the compression spring 57 and enters the outer peripheral recess 61 a. Accordingly, the engagement claws 56 and the outer peripheral concave portions 61a are engaged with each other in a concave-convex shape. The displacement of the nozzle-side attaching/detaching portion 61 in the vertical direction with respect to the attaching/detaching portion 50 is restricted by the engagement of the outer peripheral concave portion 61a and the engaging pawl 56. In this way, the nozzle-side detachable portion 61 is held by the detachable portion 50.

When the outer peripheral recess 61a is engaged with the engagement claw 56, the end of the valve body 65 abuts against the abutment portion 50 c. The valve element 65 is pressed upward by the contact portion 50c and displaced upward against the urging force of the compression spring 65 b. Therefore, the O-ring 65a is separated from the valve seat 61b, and the recess 65c having a smaller diameter than the valve seat 61b is arranged side by side with the valve seat 61 b. Accordingly, water can flow outward from the end of the nozzle-side attaching/detaching portion 61 through the recess 65 c.

As shown in fig. 14, the nozzle-side detachable portion 61 is attached to the detachable portion 50, and the opening/closing lever 52 is rotated to the open position. Accordingly, the water supply path 58 formed by the water supply port 50b, the through-hole 53a, and the water distribution pipe 51 communicates with the recess 65 c. Therefore, water supplied from the water hose 63 through the nozzle 60 and the detachable section 50 can be injected from the water injection port 54 into the cut portion of the side surface of the front lower portion of the rotary cutter 11 (see fig. 6).

The removal button 55 shown in fig. 15 can release the engagement between the nozzle-side removing portion 61 and the removing portion 50. When the removal button 55 is pressed against the urging force of the compression spring 57, the engagement claw 56 is displaced outward in the radial direction of the removal portion 50. Accordingly, the engagement between the outer peripheral concave portion 61a and the engagement claw 56 is released. At this time, the valve element 65 is pressed downward by the urging force of the compression spring 65 b. Accordingly, the end of the valve element 65 presses the contact portion 50c, and the nozzle-side removable portion 61 is pressed upward by the reaction thereof. Thus, the nozzle-side attaching/detaching portion 61 is automatically detached from the attaching/detaching portion 50. When the valve body 65 is displaced downward, the O-ring 65a abuts against the valve seat 61b, and the opening of the nozzle-side removing portion 61 is closed.

As shown in fig. 16, the cutting machine 1 can be equipped with a fixed cover 80 instead of the fixed cover 12 (see fig. 2). The fixing cover 80 has a screw fixing portion 80a that can be attached to the cover attachment portion 22c (see fig. 10). A cylindrical dust collection port 81 is provided in the front of the fixed cover 80 to communicate the inside and outside of the fixed cover 80. A dust collection hose connected to a separately prepared dust collector can be attached to the dust collection port 81, for example. Therefore, the cutter 1 can be used in both a wet type and a dry type by selectively attaching the fixed cover 12 and the fixed cover 80.

As shown in fig. 17, a plastic bottle 90 storing a liquid such as water can be attached to and detached from the attaching and detaching portion 50 instead of the nozzle 60 or the water tank 70. The plastic bottle 90 is a plastic beverage container called a PET bottle and made of polyethylene terephthalate (PET for short). The plastic bottle 90 is consumed by the general household as a container for beverages, and can be used as a container for storing cutting fluid such as water after drinking the beverages. The plastic bottle 90 is attached to the detachable portion 50 in a posture in which the opening 90a is located downward and the bottom portion 90d is located upward. The plastic bottle 90 attached to the detachable portion 50 is inclined slightly rearward as it goes upward.

As shown in fig. 18, a male screw 90b is provided on the outer periphery of the opening 90 a. The bottom 90d is provided with a hole 90c penetrating the inside and outside of the plastic bottle 90. The hole 90c is formed by drilling with a drill or the like, for example. When the level of the liquid in the plastic bottle 90 drops, air flows into the plastic bottle 90 through the hole 90 c. Due to the inflow of air, the negative pressure can be prevented from being generated in the plastic bottle 90. The bottom portion 90d provided with the hole 90c may be the bottom surface of the plastic bottle 90 or may be a side surface around the bottom surface.

As shown in fig. 18, not only the plastic bottle 90 but also the bottom 70d of the water tank 70 is provided with a hole 70c penetrating inside and outside. The air flows into the water tank 70 through the hole 70 c. The bottom 70d provided with the hole 70c may be the bottom surface of the water tank 70 or a side surface around the bottom surface. A male screw 70b is provided on the outer periphery of the opening 70a of the water tank 70. A female screw 71b screwed with the male screw 70b is provided on the upper inner periphery of the tank-side attachment portion 71. The water tank 70 and the tank-side attaching/detaching portion 71 are connected by screwing the male screw 70b and the female screw 71 b.

As shown in fig. 17, the plastic bottle 90 is attached to the detachable portion 50 via a fitting 91. As shown in fig. 18, the fitting 91 is composed of an end cap 92 on the side (lower side) of the detachable portion 50 and an interface converter 93 on the side (upper side) of the plastic bottle 90. The end cap 92 and the interface converter 93 can be separated from each other. The end cap 92 and the interface converter 93 are generally cylindrical and liquid can pass through the inside. The end cap 92 has the same tip shape and internal structure as the nozzle-side attaching portion 61 (see fig. 10) or the tank-side attaching portion 70. As shown in fig. 19, a groove-like outer peripheral recess 92a is provided on the outer periphery of the distal end of the cylindrical end cap 92. The end cap 92 has a guide surface 92c inclined in a conical surface shape at a position closer to the outer periphery of the end portion side (lower side) than the outer peripheral recessed portion 92 a. An internal thread 92b is provided on the inner periphery of the base side (upper side) of the end cap 92.

As shown in fig. 18, the interface converter 93 has a cylindrical end cap mounting portion 93c at a lower portion facing the end cap 92. The mouthpiece switch 93 has a cylindrical bottle attachment portion 93d at an upper portion facing the plastic bottle 90. The bottle mounting portion 93d is set to have a diameter larger than that of the cap mounting portion 93 c. A male screw 93a screwed with the female screw 92b is provided on the outer periphery of the cap mounting portion 93 c. An internal thread 93b screwed with the external thread 90b is provided on the inner periphery of the bottle attachment portion 93 d. The end cap 92 and the plastic bottle 90 are connected via the interface converter 93 by screwing the internal thread 92b and the external thread 93a, and the external thread 90b and the internal thread 93b, respectively. The fastening direction of the male screw 93a with respect to the female screw 92b and the fastening direction of the male screw 90b with respect to the female screw 93b are the same direction.

As shown in fig. 19, the opening 90a of the plastic bottle 90 and the end cap 92 are connected via the mouthpiece switch 93. When the end cap 92 is inserted into the detachable portion 50, the guide surface 92c pushes the engagement claw 56 radially outward of the detachable portion 50 against the urging force of the compression spring 57. When the end cap 92 is further advanced into the detachable portion 50, the engagement claw 56 biased radially inward of the detachable portion 50 by the compression spring 57 enters the outer peripheral recessed portion 92 a. Accordingly, the engagement claws 56 engage with the outer peripheral concave portions 92a in a mutually irregular shape. This retains the end cap 92 to the detachable portion 50 in a tool-less manner. When the end cap 92 is detached from the detachable section 50, the detaching button 55 is pressed against the urging force of the compression spring 57, and the engaging claw 56 is displaced radially outward of the detachable section 50. The end cap 92 automatically flies out of the detachable portion 50 by the urging force of the compression spring 65b that urges the valve body 65 toward the end portion side (downward).

The cutter 1 according to the present embodiment described above includes: a rotary cutter 11; a cutter body 10 that rotatably supports a rotary cutter 11; and a fixed cover 12 which is attached to the cutter body 10 and covers the periphery of the rotary cutter 11. The fixing cover 12 has: a water injection port 54 for injecting a liquid such as a cutting fluid into a cutting portion of the rotary cutter 11; a detachable unit 50 that communicates with the water inlet 54 and can supply liquid to the water inlet 54; and a support portion 50a that supports the detachable portion 50. The detachable section 50 allows the nozzle 60 connectable to the water hose 63 to be detached without using a tool.

Therefore, the hose 63 for tap water, which can supply a liquid such as water for a long time or in a large amount, can be easily connected to the fixed cover 12. The water hose 63 can be easily detached from the fixing cover 12 without using a tool. Therefore, the workability of attaching and detaching the water hose 63 to and from the cutter 1 is improved.

In addition, according to the cutter 1, the detachable portion 50 can selectively connect the nozzle 60 and the water tank 70 storing the liquid. Therefore, the nozzle 60 and the tank 70 connected to the tap water hose 63 can be selected according to the application. When a liquid such as water is supplied for a long time or in a large amount, the nozzle 60 can be attached to the detachable portion 50 and used. When the amount of water or the like used is small or when it is difficult to extend the service hose 63 in a work place, the water tank 70 can be attached to the detachable portion 50 and used. Accordingly, the usability of the cutter 1 becomes excellent.

Further, according to the cutter 1, the nozzle 60 has the nozzle side detachable portion 61 detachable from the detachable portion 50. The water tank 70 has a tank-side detachable portion 71 detachable from the detachable portion 50. The nozzle-side detachable portion 61 and the tank-side detachable portion 71 have the same shape. Therefore, the nozzle 60 and the tank 70 connected to the tap water hose 63 can be selected according to the application without requiring a tool for attachment or a complicated operation, and can be attached to and detached from the attachment portion.

In addition, according to the cutter 1, the cutter body 10 is gripped by the user located at the rear. The detachable portion 50 is provided in front of the fixed cover 12. Therefore, the detachable portion 50 is provided at a position away from the user and close to a portion where the rotary cutter 11 starts cutting (cutting start portion). Therefore, water or the like is easily injected into the cutting start portion. Chips are easily generated at the cutting start portion. Therefore, by injecting water or the like into the cutting start portion, chips can be effectively removed from the rotary cutter 11. In addition, resistance at the cutting start portion during cutting tends to increase and heat tends to be generated. Therefore, by injecting water or the like into the cutting start portion, the rotary cutter 11 can be cooled efficiently.

Further, according to the cutter 1, the detachable portion 50 has the support portion 50a inclined rearward as it goes upward. Therefore, the nozzle 60 or the water tank 70 attached to the detachable portion 50 is inclined upward toward the user. Therefore, the user can easily attach and detach the nozzle 60 and the water tank 70. Further, the hose 63 for tap water connected to the nozzle 60 can be extended rearward without interfering with the cutting direction.

The cutter 1 has a split structure that is divided into a right split portion 50d and a left split portion 50e along a left-right direction intersecting the attaching and detaching direction of the nozzle 60 to and from the attaching and detaching portion 50. The detachable portion 50 can be exposed by disassembling the support portion 50a into a half-open state. Therefore, for example, when chips or the like enter the detachable portion 50, the supporting portion 50a can be disassembled into a half-opened state to expose the detachable portion 50. This facilitates cleaning of the detachable portion 50, and prevents clogging with chips and the like.

Further, according to the cutter 1, the attaching and detaching portion 50 includes: an engagement claw 56 projecting radially inward of the detachable section 50 and displaceable in the radial direction of the detachable section 50; and a compression spring 57 that biases the engagement claw 56 radially inward of the detachable portion 50. An outer peripheral concave portion 61a and a guide surface 61c are provided on the outer periphery of the nozzle-side detachable portion 61 of the nozzle 60, wherein the outer peripheral concave portion 61a is engaged with the engaging claw 56 in a concave-convex manner; the guide surface 61c is disposed on the end side of the nozzle 60 with respect to the outer peripheral recessed portion 61 a. The guide surface 61c is inclined radially outward from the end portion side toward the base portion side of the nozzle 60.

Therefore, when the nozzle-side detachable portion 61 of the nozzle 60 is pushed into the detachable portion 50, the guide surface 61c causes the engagement claw 56 to retract outward in the radial direction of the detachable portion 50 against the urging force of the compression spring 57. This enables the nozzle-side detachable portion 61 to further enter the detachable portion 50. When the guide surface 61c is more deeply located in the detachable portion 50 than the engaging claw 56, the retracted engaging claw 56 is biased by the compression spring 57 and protrudes radially inward of the detachable portion 50. Accordingly, the engagement claw 56 is engaged with the outer peripheral concave portion 61a of the nozzle 60. In this way, the nozzle 60 can be attached to the detachable portion 50 only by the operation of pressing the nozzle 60 into the detachable portion 50.

Further, the cutter 1 includes: a water supply path 58 through which water can be supplied from the detachable section 50 to the water filling port 54; an opening/closing cock 53 for opening/closing the water supply path 58; and an opening/closing lever 52 connected to the opening/closing cock 53 and exposed to the outside of the detachable section 50. The opening/closing cock 53 and the opening/closing operation handle 52 are rotatable about an axis extending in the left-right direction and intersecting the water supply path 58. The water supply path 58 is opened and closed by rotating the opening and closing cock 53. Therefore, the opening and closing of the water supply path 58 can be switched only by rotating the opening and closing operation lever 52. And the opening/closing lever 52 is exposed to the outside of the detachable section 50. Therefore, the water supply path 58 can be opened and closed from the outside of the detachable portion 50. This improves the operability of the opening and closing operation of the water supply path 58.

Further, according to the cutter 1, the illumination lamp 33 for illuminating the cutting portion is provided in the cutter body 10. Therefore, it is easy to visually confirm whether or not the rotary cutter 11 cuts the workpiece properly. Further, it is easy to confirm whether or not the cutting fluid is properly sprayed from the water injection port 54 to the cutting portion of the rotary cutter 11. Therefore, the work efficiency of cutting the material to be cut while injecting water to the cutting portion is improved.

Further, the cutter 1 includes: a base 2; and a horizontal tilting operation support shaft 5 that supports the cutter body 10 to be tiltable in the horizontal direction with respect to the base 2. The illumination lamp 33 is disposed on the opposite side of the rotary cutter 11 via the leftward and rightward tilting support shaft 5. Therefore, the cutter body 10 is tilted toward the rotary cutter 11 about the leftward and rightward tilting support shaft 5, for example. In this tilted posture, the illumination lamp 33 is positioned above the rotary cutter 11 on the opposite side of the rotary cutter 11 via the left and right tilt support shafts 5. Therefore, the illumination lamp 33 irradiates the cutting portion of the rotary cutter 11 from above to below. Accordingly, the cut portion can be made excellent in visibility even in the inclined posture.

Further, the cutter 1 includes: a rotary cutter 11; a cutter body 10 that rotatably supports a rotary cutter 11; and a fixed cover 12 mounted to the cutter body 10 and covering the periphery of the rotary cutter 11. The fixing cover 12 has: a water injection port 54 for injecting a liquid such as a cutting fluid into the cutting site; a detachable unit 50 that communicates with the water inlet 54 and can supply liquid to the water inlet 54; and a support portion that supports the detachable portion 50. The detachable section 50 can detach and attach the plastic bottle 90. Therefore, as a supply source of the liquid to be injected, a plastic bottle 90 which is inexpensive and easily available as a container for beverages consumed by the public households can be used. Therefore, even in the case where it is difficult to obtain a bottle dedicated to the cutter, it is possible to use the plastic bottle 90 and use the cutter 1 in a wet manner. Further, by using the plastic bottle 90, a preferred volume corresponding to the usage state can be selected from various volumes. In this way, the cutter 1 can be used by connecting the inexpensive and convenient plastic bottle 90 to the detachable portion 50.

Further, the cutter 1 includes a metal fitting 91, and the metal fitting 91 is used to attach and detach the plastic bottle 90 to and from the attaching and detaching portion 50. A male screw 90b is provided on the outer periphery of the opening 90a of the plastic bottle 90. The fitting 91 is provided with a female screw 93b screwed with the male screw 90 b. Therefore, the plastic bottle 90 can be easily attached to and detached from the attachment and detachment section 50 through the fitting 91. Further, the male screw 90b and the female screw 93b are screwed together, whereby the plastic bottle 90 can be easily connected to the fitting 91 and the connection can be easily released.

Further, according to the cutter 1, the attachment 91 can be separated into the end cap 92 and the interface converter 93, wherein the end cap 92 is provided so as to be engageable with the detachable portion 50; an interface switch 93 connects the end cap 92 to the plastic bottle 90. Thus, plastic bottles 90 of various shapes or sizes can be connected to end caps 92 by way of interface switch 93. The end cap 92 can be provided in the same shape as the nozzle-side detachable portion 61 attached to the end of the water hose 63 or the tank-side detachable portion 71 attached to the water tank 70, for example. This enlarges the range of selecting the supply source of the liquid to be injected. Therefore, the use convenience of the cutter 1 is improved.

Further, according to the cutter 1, the interface converter 93 has a bottle mounting portion 93d for mounting the plastic bottle 90 and an end cap mounting portion 93c for mounting the end cap 92. The bottle mounting portion 93d has a diameter larger than that of the cap mounting portion 93 c. Therefore, the opening 90a of the plastic bottle 90 having a large opening diameter can be connected to the end cap 92 via the mouthpiece switch 93.

In addition, according to the cutter 1, the plastic bottle 90 has a hole 90c at the bottom 90 d. Therefore, air can be let into the plastic bottle 90 from the hole 90 c. When the water level drops due to the pouring of water to cause the liquid to flow out of the plastic bottle 90, negative pressure is generated in the air inside the plastic bottle 90. The negative pressure can act as a brake to reduce the rate of water injection. Since air can freely flow into the plastic bottle 90 from the hole 90c, negative pressure can be prevented from being generated in the plastic bottle 90. Accordingly, water can be smoothly filled using the plastic bottle 90.

In addition, according to the cutter 1, the water tank 70 has a hole 70c at the bottom 70 d. Therefore, air can be let into the water tank 70 from the hole 70 c. Accordingly, water can be smoothly filled not only when the plastic bottle 90 is used but also when the water tank 70 is used.

The cutter 1 of the present embodiment described above can be variously modified. A diamond wheel is exemplified as the rotary tool 11. Alternatively, the rotary cutter 11 may be a disk-shaped grinding stone or a saw blade, for example. Although the fixed cover 12 is illustrated as being attachable to and detachable from the cutter main body 10, the fixed cover 12 may be provided integrally with the cutter main body 10. The configuration in which the water filling port 54 is disposed on the side of the front lower portion of the rotary cutter 11 is exemplified. Instead of this, for example, the water filling port 54 may be disposed on a side of the rear lower portion of the rotary cutter 11. For example, the water injection ports 54 may be provided at a plurality of positions around the rotary cutter 11. The engaging claw 56 and the outer peripheral recess 61a are illustrated as engaging with each other and having a rectangular cross-sectional shape. Instead, for example, the engagement claw 56 and the outer circumferential concave portion 61a that engage with each other in a U-shaped, wedge-shaped, zigzag-shaped cross section may be used.

The plastic bottle 90 is exemplified by a pet bottle as a commercially available plastic bottle for beverages, but may be a bottle made of a plastic other than polyethylene terephthalate. The number of the

holes

70c and 90c may be 1 or more. In order to prevent the liquid from leaking from the

holes

70c, 90c when the liquid is injected into the water tank 70 or the plastic bottle 90, a plug or a valve capable of closing the

holes

70c, 90c may be provided. Instead of the fitting 91 separable into the end cap 92 and the interface converter 93, an integrally provided fitting may be used. Although the plastic bottle 90 is attached to and detached from the attaching and detaching portion 50 without using a tool, a tool such as a screwdriver may be used instead.

Claims

1. A portable cutting machine for stonemark, which is characterized in that,

comprising:

rotating the cutter;

a cutter body that rotatably supports the rotary cutter; and

a fixed cover mounted on the cutter body and covering the periphery of the rotary cutter,

the fixing cover has: a water injection port for injecting a liquid such as a cutting fluid into the cutting site; a detachable section that communicates with the water filling port and can supply the liquid to the water filling port; and a support portion that supports the detachable portion,

the detachable portion can detach and attach the nozzle connectable to the tap water hose without using a tool.

2. The portable cutter for stonemark according to claim 1,

the detachable portion can selectively connect the nozzle and a tank storing the liquid.

3. The portable cutter for stonemark according to claim 2,

the nozzle has a nozzle side detachable portion detachable from the detachable portion,

the tank has a tank-side detachable portion detachable from the detachable portion,

the nozzle side detachable portion and the water tank side detachable portion are in the same shape.

4. The portable cutter for stonemark according to any one of claims 1 to 3, wherein,

the cutter body is gripped by a user located at the rear,

the detachable part is arranged in front of the fixed cover.

5. The portable cutter for stonemark according to claim 4,

the detachable portion has the support portion inclined rearward as it goes upward.

6. The portable cutter for stonemark according to any one of claims 1 to 5, wherein,

a split structure divided along a direction intersecting a mounting/dismounting direction of the nozzle to/from the mounting portion,

the detachable portion can be exposed by disassembling the support portion into a half-opened state.

7. The portable cutter for stonemark according to any one of claims 1 to 6, wherein,

the detachable portion includes: an engagement claw that protrudes inward in the radial direction of the detachable portion and is displaceable in the radial direction of the detachable portion; and a biasing member that biases the engaging claw radially inward of the detachable portion,

an outer circumferential recessed portion and a guide surface are provided on an outer circumference of the nozzle, wherein the outer circumferential recessed portion is engaged with the engaging claw in a concave-convex manner; the guide surface is disposed on an end side of the nozzle with respect to the outer peripheral recessed portion,

the guide surface is inclined radially outward from the end portion side of the nozzle toward the base portion side.

8. The portable cutter for stonemark according to any one of claims 1 to 7,

comprising: a water supply path through which water can be supplied from the detachable portion to the water filling port; an opening/closing cock for opening/closing the water supply path; and an opening/closing operation handle connected to the opening/closing cock and exposed to the outside of the detachable portion,

the opening/closing cock and the opening/closing operation handle are rotatable about an axis intersecting the water supply path, and the water supply path is opened and closed by rotating the opening/closing cock.

9. The portable cutter for stonemark according to any one of claims 1 to 8, wherein,

the cutter body is provided with an illumination lamp for illuminating the cutting portion.

10. The portable cutter for stonemark according to claim 9,

comprising: a base; and a rotation center shaft that supports the cutter body to be tiltable with respect to the base,

the illumination lamp is disposed on the opposite side of the rotary cutter with the rotation center shaft therebetween.

11. A portable cutting machine for stonemark, which is characterized in that,

comprising:

rotating the cutter;

a cutter body that rotatably supports the rotary cutter; and

a stationary cover mounted to the cutter body and covering a periphery of the rotary cutter,

the detachable part can be used for detaching and assembling a plastic bottle for the commercial beverage.

12. The portable cutter for stonemark according to claim 11,

has a fitting for attaching and detaching the commercially available beverage plastic bottle to and from the attachment and detachment section,

an external thread is provided on the outer periphery of the opening of the commercial plastic bottle for beverages,

and the fitting is provided with an internal thread screwed with the external thread.

13. The portable cutter for stonemark according to claim 12,

the accessory is separable into an end cap and an interface converter, wherein the end cap is provided to be capable of engaging with the detachable portion; the interface adapter connects the end cap to the commercially available beverage plastic bottle.

14. The portable cutter for stonemark according to claim 13,

the interface converter is provided with a bottle mounting part for mounting the plastic bottle for the commercial beverage and an end cap mounting part for mounting the end cap,

the diameter of the bottle mounting portion is greater than the diameter of the end cap mounting portion.

15. The portable cutter for stonemark according to any one of claims 11 to 14, wherein,

the plastic bottle for commercial beverage has a hole at the bottom.

16. The portable cutter for stonemark according to claim 2 or 3,

the water tank has a hole at the bottom.