JP2021151765A - Portable cutting machine for masonry - Google Patents

Abstract

To provide a conventionally required portable cutting machine for masonry capable of easily connecting with a feed source for water or the like poured to a cutting part and further easily capable of removing the connection with the feed source.SOLUTION: A cutting machine 1 comprises a rotary blade tool 11, a cutting machine body 10 rotatably supporting the rotary lade tool 11 and a stationary cover 12 fitted to the cutting machine body 10 and covering the circumference of the rotary blade tool 11. The stationary cover 12 comprises a water pouring port 54 pouring a liquid such as a cutting liquid to the cutting part of the rotary blade tool 11, a detachable part 50 communicated with the water pouring port 54 and capable of feeding a liquid to the water pouring port 54, and a support part 50a supporting the detachable part 50. The detachable part 50 can detach a nozzle 60 connectable with a hose for tap water in a tool-less state.SELECTED DRAWING: Figure 10

Description

The present invention relates to a portable cutting machine for masonry for cutting a material to be cut such as a stone material.

A portable cutting machine for masonry is generally called a cutter, and is used for cutting a material to be cut such as a stone material. A portable masonry cutting machine has a base that comes into contact with the upper surface of the material to be cut, a cutting machine body that is supported by the upper surface of the base and houses an electric motor, and a circular shape called a diamond wheel that is rotated by the electric motor. Equipped with a rotary cutting tool. With the base in contact with the upper surface of the material to be cut, the operator moves the portable masonry cutting machine in the cutting direction to cut the rotary cutting tool into the material to be cut. As a result, the material to be cut can be cut. Among the portable cutting machines for masonry, a wet type that cuts a material to be cut while pouring a liquid such as water into the cutting site at the time of cutting is provided.

A wet masonry portable cutting machine is equipped with, for example, a tank for supplying water or the like. Patent Documents 1 and 2 disclose a portable masonry cutting machine to which a tank can be attached. The tank of the portable masonry cutting machine disclosed in Patent Document 1 is attached to the cutting machine main body by screwing. Therefore, it was necessary to separately prepare a tool for attaching and detaching the tank. The tank of the portable masonry cutting machine disclosed in Patent Document 2 is toolless and can be attached to and detached from the main body of the cutting machine.

Since the amount of water that can be stored in the tank is limited, it is necessary to remove the tank and replenish it with water every time the tank is empty. Therefore, there has been a need for a portable cutting machine for masonry that can supply water or the like for a long time or in a large amount. Patent Document 3 discloses a portable masonry cutting machine to which a water hose can be attached. However, it was necessary to prepare a separate tool for attaching and detaching the water hose, and there was room for improvement in the detachability. Further, for example, the toolless detachable structure disclosed in Patent Document 2 is designed according to the amount of water in the tank, the opening shape, and the like. Therefore, the structure is such that a tap water hose or the like that can supply a large amount of water or the like for a long time cannot be easily attached or detached.

Japanese Unexamined Patent Publication No. 2013-82104 European Patent Application Publication No. 2236234 JP-A-2017-217794

Therefore, a portable masonry cutting machine that can be easily connected to a source of water or the like poured into the cutting site and can be easily disconnected from the supply source has been conventionally required.

According to one feature of the present disclosure, the portable cutting machine for masonry has a rotary cutting tool, a cutting machine main body that rotatably supports the rotary cutting tool, and a fixed cover that is attached to the cutting machine main body and covers the circumference of the rotary cutting tool. doing. The fixed cover has a water injection port for injecting a liquid such as a cutting fluid into the cutting portion, an attachment / detachment portion that communicates with the water injection port and can supply the liquid to the water injection port, and a support portion for supporting the attachment / detachment portion. As for the attachment / detachment part, a nozzle that can be connected to a tap water hose can be attached / detached without a tool.

Therefore, a tap water hose capable of supplying a liquid such as water for a long time or in a large amount can be easily connected to the fixing cover. Furthermore, the tap water hose can be easily removed from the fixing cover without tools. Therefore, the operability of attaching / detaching the tap water hose from the portable cutting machine for masonry is improved.

According to another feature of the present disclosure, the attachment / detachment portion can selectively connect the nozzle and the tank in which the liquid is stored. Therefore, the nozzle and tank connected to the tap water hose can be selected according to the application. When supplying a liquid such as water for a long time or in a large amount, the nozzle can be attached to the attachment / detachment portion and used. When the amount of water used is small or when it is difficult to extend the tap water hose, the tank can be attached to the detachable part for use. This improves the usability of the portable masonry cutting machine.

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

According to another feature of the present disclosure, the cutting machine body is gripped by a user located at the rear. The attachment / detachment portion is provided in front of the fixed cover. Therefore, the attachment / detachment portion is provided at a position far from the user and close to the portion where the rotary cutting tool starts cutting (cutting start portion). Therefore, it is easy to inject water or the like into the cutting start site. Chips are likely to be generated at the cutting start site. Therefore, chips can be effectively removed from the rotary cutting tool by injecting water or the like into the cutting start site. Further, the cutting start site tends to have a large resistance at the time of cutting and easily generate heat. Therefore, the rotary cutting tool can be effectively cooled by injecting water or the like into the cutting start site.

According to another feature of the present disclosure, the detachable portion has a support portion that is inclined rearward as it goes upward. Therefore, the nozzle or tank attached to the attachment / detachment portion is inclined upward toward the user side. Therefore, the operability when the user attaches / detaches the nozzle or the tank is good. In addition, the tap water hose connected to the nozzle can be extended backward so as not to hinder the cutting traveling direction.

According to another feature of the present disclosure, the portable cutting machine for masonry has a half-split structure divided into a direction intersecting the attachment / detachment direction of the nozzle with respect to the attachment / detachment portion. The detachable part can be exposed by disassembling the support part in half. Therefore, for example, when chips or the like enter the attachment / detachment portion, the support portion can be disassembled into a half state to expose the attachment / detachment portion. This makes it easy to clean the detachable part and prevents clogging with chips and the like.

According to other features of the present disclosure, the attachment / detachment portion has an engaging claw that protrudes inward in the radial direction of the attachment / detachment portion and is displaceable in the radial direction of the attachment / detachment portion, and the engagement claw is directed inward in the radial direction of the attachment / detachment portion. Has an urging member to urge. On the outer periphery of the nozzle, an outer peripheral recess that engages with the engaging claw unevenly and a guide surface arranged on the end side of the nozzle with respect to the outer peripheral recess are provided. The guide surface is inclined outward in the radial direction from the end side to the base side of the nozzle.

Therefore, when the nozzle is pushed into the attachment / detachment portion, the guide surface retracts the engaging claw outward in the radial direction against the urging force of the urging member. As a result, the nozzle can be further inserted into the attachment / detachment portion. When the guide surface enters the back side of the attachment / detachment portion from the engagement claw, the retracted engagement claw is urged by the urging member and protrudes inward in the radial direction of the attachment / detachment portion. As a result, the engaging claw engages with the outer peripheral recess of the nozzle in an uneven manner. Thus, the nozzle can be attached to the attachment / detachment portion only by pushing the nozzle into the attachment / detachment portion.

According to another feature of the present disclosure, the portable cutting machine for masonry has a water supply path capable of supplying water from the attachment / detachment portion to the water injection port, an opening / closing cock forming a part of the water supply path, and an opening / closing cock connected to the attachment / detachment portion. Has an open / close lever exposed to the outside of the. The open / close cock and open / close lever can rotate about an axis extending across the water supply path. The water supply path is opened and closed by rotating the open / close cock. Therefore, the opening and closing of the water supply path can be switched only by rotating the opening / closing lever. Further, the opening / closing lever is exposed to the outside of the attachment / detachment portion. Therefore, the water supply path can be opened and closed from the outside of the attachment / detachment portion. As a result, the operability of opening and closing the water supply path is good.

According to another feature of the present disclosure, the masonry portable cutting machine has a light on the cutting machine body to illuminate the cutting site. Therefore, it is easy to visually recognize whether or not the cutting of the rotary cutting tool into the material to be cut is appropriate. Furthermore, it is easy to visually check whether or not the application of the cutting fluid from the water injection port to the cutting site is appropriate. Therefore, the efficiency of the work of cutting the material to be cut while injecting water into the cut portion is improved.

According to another feature of the present disclosure, the masonry portable cutting machine has a base and a rotation center axis that slantably supports the cutting machine body with respect to the base. The light is arranged on the side opposite to the rotary cutting tool with the rotation center axis in between. Therefore, for example, the cutting machine main body is tilted toward the rotary cutting tool with the rotation center axis as the center. In this tilted position, the light is located above the rotary cutting tool on the opposite side of the rotating central axis with respect to the rotating cutting tool. Therefore, the light irradiates the cut portion of the rotary cutting tool from above to below. As a result, the visibility of the cut portion can be improved even in the tilted posture.

According to another feature of the present disclosure, the portable cutting machine for masonry has a rotary cutting tool, a cutting machine main body that rotatably supports the rotary cutting tool, and a fixed cover that is attached to the cutting machine main body and covers the circumference of the rotary cutting tool. doing. The fixed cover has a water injection port for injecting a liquid such as a cutting fluid into the cutting portion, an attachment / detachment portion that communicates with the water injection port and can supply the liquid to the water injection port, and a support portion for supporting the attachment / detachment portion. A plastic bottle for commercial beverages can be attached / detached to / from the attachment / detachment portion. Therefore, as a source of the liquid to be injected, an inexpensive and easily available plastic bottle for beverages can be used as a container for beverages consumed in many households. Therefore, even when it is difficult to obtain a bottle dedicated to the cutting machine, a portable cutting machine for masonry can be used wet using a plastic bottle for a commercially available beverage. Further, by using a plastic bottle for a commercially available beverage, a suitable capacity can be selected from a wide variety of capacities according to the usage condition. Thus, a cheap and convenient plastic bottle for commercial beverages can be connected to the attachment / detachment portion to use a portable cutting machine for masonry.

According to another feature of the present disclosure, the portable cutting machine for masonry has an attachment for attaching and detaching a plastic bottle for a commercially available beverage to an attaching and detaching portion. A male screw is provided on the outer circumference of the opening of a plastic bottle for commercial beverages. The attachment is provided with a female screw that is screwed with a male screw. Therefore, the plastic bottle for commercial beverages can be easily attached to and detached from the attachment / detachment portion via the attachment. Further, by screwing the male screw and the female screw, the plastic bottle for commercial beverages can be easily connected to the attachment, and the connection can be easily released.

According to another feature of the present disclosure, the attachment can be separated into a cap provided so as to engage with the detachable portion and an adapter for connecting the cap and a plastic bottle for commercial beverages. Therefore, plastic bottles for commercial beverages of various shapes and sizes can be connected to the cap via an adapter. Further, the cap can be provided in the same shape as the nozzle-side attachment / detachment portion attached to the end of the tap water hose, or the tank-side attachment / detachment portion attached to the tank for storing the liquid, for example. This expands the range of selection of the source of the liquid to be injected. Therefore, the portable cutting machine for masonry is easy to use.

According to another feature of the present disclosure, the adapter has a bottle attachment portion to which a commercial beverage plastic bottle is attached and a cap attachment portion to which a cap is attached. The bottle mounting portion has a larger diameter than the cap mounting portion. Therefore, the opening of a commercial beverage plastic bottle having a relatively large opening diameter can be connected to the cap via an adapter.

According to other features of the present disclosure, commercial beverage plastic bottles have a hole in the bottom. Therefore, air can be introduced into the plastic bottle for commercial beverages through the holes. When the liquid is discharged from the plastic bottle for commercial beverages by water injection and the water level drops, negative pressure is generated in the air inside the bottle. This negative pressure can act as a brake to reduce the water injection rate. Since air can freely flow into the plastic bottle from the holes, it is possible to prevent the generation of negative pressure in the plastic bottle. This enables smooth water injection.

According to other features of the disclosure, the tank has a hole in the bottom. Therefore, air can be introduced into the tank through the holes. Therefore, smooth water injection is possible not only when using a plastic bottle for commercial beverages but also when using a tank.

It is an overall perspective view which attached the nozzle of the cutting machine which concerns on this embodiment. It is a left side view of the cutting machine to which a nozzle is attached. It is a left side view of the cutting machine to which the tank is attached. It is a right side view of a cutting machine. It is a top view of the cutting machine. It is a bottom view of a cutting machine. It is a front view of a cutting machine. It is a front view of the cutting machine which tilted the cutting machine body to the right. It is a rear view of the cutting machine from which the rechargeable battery was removed. It is an exploded perspective view of a cutting machine. It is a right side view of a fixed cover of a cutting machine and a nozzle. It is a right side view of the fixed cover of a cutting machine and a nozzle, and is the side view excluding the right half part of a support part. 11 is a cross-sectional view taken along the line XIII-XIII in FIG. 11, which is a vertical cross-sectional view of a detachable portion and a nozzle when the opening / closing lever is in the closed state. 11 is a view corresponding to a cross-sectional view taken along line XIII-XIII in FIG. 11, and is a vertical cross-sectional view of a detachable portion and a nozzle when the opening / closing lever is in the open state. FIG. 11 is a view corresponding to a cross-sectional view taken along line XIII-XIII in FIG. 11, and is a vertical cross-sectional view of a nozzle attached / detached portion and a nozzle when the nozzle is removed from the attached / detached portion. It is a left side view of the cutting machine which attached the fixed cover provided with the dust collector. It is a left side view of the cutting machine which attached the plastic bottle for beverages. It is an exploded perspective view of a cutting machine. It is a vertical cross-sectional view of the attachment / detachment part to which the plastic bottle for beverages is attached.

Next, one embodiment of the present invention will be described with reference to FIGS. 1-19. As shown in FIGS. 1 and 2, the cutting machine (portable cutting machine for masonry) 1 is generally called a cutter, and is used for cutting a material to be cut such as a stone material, for example. The cutting machine 1 is, for example, a portable type that can be held by one hand to perform cutting work. The wet cutting machine 1 cuts the material W to be cut while pouring a liquid such as water into the cutting site. The material to be cut W is mainly a stone material and includes concrete, asphalt, brick and the like. Liquids such as water prevent the scattering of chips generated during cutting and cool the cutting site.

As shown in FIG. 2, the cutting machine 1 has a base 2 that is in contact with the upper surface of the material W to be cut, and a cutting machine main body 10 that is supported above the base 2. The cutting machine main body 10 is provided with a rotary cutting tool 11 called a diamond wheel. The user grips the cutting machine 1 located on the right side in FIG. In the following description, the direction in which the cutting proceeds is the front, and the user side, which is the opposite side, is the rear. The left-right direction is determined based on the user.

As shown in FIGS. 1 and 2, the cutting machine main body 10 is supported on the upper surface of the base 2 via a front tilting support portion 3 provided at the front portion and a rear tilting support portion 4 provided at the rear portion. There is. The front tilt support portion 3 and the rear tilt support portion 4 each have a left / right tilt support shaft (rotation center shaft) 5 extending in the front-rear direction. The left-right tilt support shaft 5 of the front tilt support portion 3 and the left-right tilt support shaft 5 of the rear tilt support portion 4 are coaxial with each other. The cutting machine main body 10 can be tilted left and right with respect to the left and right tilting support shaft 5. The cutting machine main body 10 can be tilted to the right up to about 45 ° as shown in FIG. 8, for example. By tilting the cutting machine main body 10 to the left or right, it is possible to perform tilt cutting in which the rotary cutting tool 11 is tilted with respect to the lower surface of the base 2. The front tilting support portion 3 is provided with a left / right tilting fixing screw 3a. By operating the left-right tilt fixing screw 3a in the screw loosening direction, the cutting machine main body 10 can be tilted left and right. By operating the left / right tilt fixing screw 3a in the screw tightening direction, the cutting machine main body 10 can be fixed at a predetermined left / right tilt angle.

As shown in FIG. 2, a vertical swing support shaft 6 extending in the left-right direction is provided at the rear portion of the front tilt support portion 3. The cutting machine main body 10 can swing up and down about the vertical swing support shaft 6. By swinging the cutting machine main body 10 up and down, the cutting depth at which the rotary cutting tool 11 cuts into the material W to be cut can be adjusted.

As shown in FIGS. 2 and 5, a depth guide 7 for adjusting the depth of cut is provided at the rear portion of the base 2. The depth guide 7 extends in an arc shape along the circumferential direction of the vertical swing support shaft 6. The depth guide 7 is provided with a vertical swing fixing lever 8. The vertical swing fixing lever 8 can rotate about a lever shaft 8a extending to the left and right. The vertical swing fixing lever 8 fastens the depth guide 7 and the fixing cover 12 described later. By operating the vertical swing fixing lever 8 in the screw loosening direction, the cutting machine main body 10 can be swung up and down. By operating the vertical swing fixing lever 8 in the screw tightening direction, the cutting machine main body 10 can be fixed at a vertical swing angle that is a predetermined cutting depth.

As shown in FIG. 2, the cutting machine main body 10 has a fixed cover 12. The fixed cover 12 covers the range of the upper half circumference of the rotary cutting tool 11. The range of the lower half circumference of the rotary cutting tool 11 projects downward from the base 2 and is exposed. By moving the cutting machine 1 forward while rotating the rotary cutting tool 11, the material W to be cut is cut by the protruding portion of the rotary cutting tool 11.

As shown in FIGS. 5 and 7, the cutting machine main body 10 has a cylindrical motor housing 20 and a gear housing 22 adjacent to the motor housing 20. The motor housing 20 houses an electric motor 21 called a DC brushless motor. 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 the end of the motor shaft 21a in the extending direction. Around the plurality of intake ports 20a, ribs 20b slightly protruding in the extending direction (right side) of the motor shaft 21a are provided. For example, when the cutting machine 1 is mounted with the motor housing 20 side facing downward, a gap is formed between the mounting surface and the intake port 20a by the ribs 20b. As a result, it is possible to prevent a large amount of chips from entering due to an excessive suction force generated by the motor housing 20 being attracted to the mounting surface. Therefore, it is possible to prevent chips from entering the motor housing 20 from the intake port 20a.

As shown in FIGS. 4 and 5, the cutting machine main body 10 has a controller 24 housed behind the electric motor 21. The controller 24 is a resin-molded controller in which a control board is housed in a case having a shallow rectangular bottom. The controller 24 is housed in a posture in which the thickness direction (short direction) is along the vertical direction. The controller 24 is equipped with a control circuit, a drive circuit, an auto stop circuit, and the like. The control circuit mainly consists of a microcomputer for controlling the operation of the electric motor 21. The drive circuit includes FETs that switch the current of the electric motor 21 based on the control signal received from the control circuit. The auto stop circuit cuts off the power supply to the electric motor 21 so as not to cause an over-discharge or an over-current state according to the detection result of the state of the rechargeable battery 41 described later.

As shown in FIGS. 5 and 7, a plurality of exhaust ports 22b are provided in front of the gear housing 22. The plurality of intake ports 20a and the plurality of exhaust ports 22b communicate with each other through the inside of the motor housing 20 and the gear housing 22. A cooling fan (not shown) is attached to the motor shaft 21a. The rotation of the cooling fan together with the motor shaft 21a causes a wind flow from the plurality of intake ports 20a to the plurality of exhaust ports 22b. The electric motor 21 and the like are cooled by this wind flow.

As shown in FIG. 7, the gear housing 22 houses a reduction gear mechanism 22a and a spindle (output shaft) 16 rotated by the reduction gear mechanism 22a. The spindle 16 extends in the left-right direction and is rotatably supported by the gear housing 22. The rotational output of the motor shaft 21a of the electric motor 21 is decelerated via the reduction gear mechanism 22a and transmitted to the spindle 16. The left end side of the spindle 16 projects into the fixed cover 12. A rotary cutting tool 11 is attached to this protruding portion.

As shown in FIG. 6, the rotary cutting tool 11 is sandwiched between the outer flange 14 and the inner flange 15 in the direction perpendicular to the plane (left-right direction) in a posture orthogonal to the spindle 16. The pinched state of the rotary cutting tool 11 is locked by the fixing screw 13 tightened to the left end of the spindle 16. As a result, the rotary cutting tool 11 is fixed to the spindle 16 so that it cannot be displaced in the axial direction and cannot rotate around the axis.

As shown in FIG. 7, a shaft lock 23 is provided at the front portion of the gear housing 22. By pushing the shaft lock 23 into the gear housing 22, the spindle 16 becomes non-rotatable. As a result, the fixing screw 13 can be rotated by a hexagon wrench 42 or the like, and the rotary cutting tool 11 can be removed from the spindle 16 and replaced.

As shown in FIG. 1, a handle housing 30 is provided above the motor housing 20 and the gear housing 22 (see FIG. 5). The handle housing 30 has a handle portion 30a that is gripped by the user. The handle portion 30a has a loop shape, extends upward and rearward from the front upper surface of the cutting machine main body 10, and is connected to the rear portion of the cutting machine main body 10. An elastomer resin layer for preventing slippage is provided on the surface of the handle portion 30a. As shown in FIG. 4, a spanner mounting portion 43 to which the hexagonal bar spanner 42 can be mounted is provided at the rear portion of the handle portion 30a.

As shown in FIG. 4, a switch lever 31 is provided on the inner peripheral side of the handle portion 30a. The switch lever 31 is provided so that the user can hang a finger on the handle portion 30a while holding the handle portion 30a and pull the switch lever 31. When the switch lever 31 is pulled and operated, the electric motor 21 is activated and the rotary cutting tool 11 is rotated. A lock-off button 32 is provided on the upper portion of the handle portion 30a. The switch lever 31 is locked in the normal state and cannot be pulled. By pressing the lock-off button 32 horizontally in the right or left direction, the switch lever 31 is released from the locked state at the off position and can be pulled. The switch lever 31 automatically returns to the lock-off state when the pulling operation is released. Further, as shown in FIG. 7, the left and right lock-off buttons 32 have a cylindrical portion protruding from the handle portion 30a to the left and right, and the upper portion thereof is notched toward the left and right outward with respect to the lower portion. It has a flat shape with an inclined upper part. Therefore, the surface of the tip of the user's fingertip can be easily brought into contact with the inclined flat surface portion of the lock-off button 32. Further, the left and right lock-off buttons 32 are integrated with each other by an intermediate portion thereof, and can be horizontally moved in the left-right direction. By pushing the inclined flat surface portion of the upper part of the lock-off button 32, the user can move the lock-off button 32 in the left-right direction without feeling uncomfortable while applying a slight downward force without moving the lock-off button 32 horizontally in the left-right direction. Can be made to.

As shown in FIG. 7, a light 33 is provided on the front portion of the handle housing 30. The light 33 is, for example, a light emitting diode (LED). The light 33 is turned on by pulling the switch lever 31 to turn it on. The light 33 illuminates the cutting portion of the rotary cutting tool 11. The light 33 is located to the right of the left-right tilting support shaft 5 in a so-called right-angle cutting posture in which the rotary cutting tool 11 is orthogonal to the lower surface of the base 2. On the other hand, the rotary cutting tool 11 is located to the left of the left-right tilting support shaft 5 in the right-angle cutting posture. Therefore, the light 33 irradiates the cutting portion of the rotary cutting tool 11 located on the lower left side at the time of right-angle cutting. Further, as shown in FIG. 8, the light 33 irradiates the cutting machine main body 10 toward the cutting portion of the rotary cutting tool 11 located from the upper side to the lower side when the cutting machine main body 10 is inclined to the left.

As shown in FIG. 4, a concave adapter mounting portion 34 is provided on the side portion of the handle housing 30. The communication adapter 35 can be inserted and mounted in the adapter mounting portion 34. The communication adapter 35 is capable of wireless communication with other ancillary equipment. By wireless communication, the cutting machine 1 and the start-up operation and the stop operation of the ancillary equipment can be linked. With the communication adapter 35, for example, a dust collector installed separately from the cutting machine 1 and the cutting machine 1 can be interlocked with each other.

As shown in FIGS. 2 and 9, a battery mounting portion 40 is provided at the rear portion of the cutting machine main body 10. The mounting surface of the battery mounting portion 40 faces rearward. The rechargeable battery 41 can be mounted on the battery mounting portion 40 by sliding it 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 18 V. The rechargeable battery 41 can be recharged repeatedly, and can be charged by removing it from the battery mounting portion 40 and charging it with a separately prepared charger. The rechargeable battery 41 can be reused as a power source with other rechargeable electric tools such as a screw tightener and an electric drill.

As shown in FIG. 10, the fixed cover 12 is removable from the side portion of the gear housing 22. The gear housing 22 has a flat plate-shaped cover mounting portion 22c that extends in the front-rear direction. A screwing portion 12a is provided on the left side portion of the fixing cover 12. As shown in FIGS. 11 and 12, a plurality of hook-shaped bent hook portions 12b are provided around the right side portion of the fixed cover 12. The hook portion 12b is hooked on the cover mounting portion 22c, and the screwed portion 12a and the cover mounting portion 22c are screwed together. As a result, the fixing cover 12 is fixed to the gear housing 22.

As shown in FIGS. 2 and 10, the front portion of the fixed cover 12 is provided with a detachable portion 50 to which the nozzle 60 or the tank 70, which will be described later, can be attached and detached. A cylindrical support portion 50a that supports the attachment / detachment portion 50 from the outside is provided on the upper portion of the attachment / detachment portion 50. The support portion 50a is inclined rearward and extends toward the upper side, and the upper end thereof is open. As shown in FIG. 7, the support portion 50a has a left and right half split structure that can be divided into a right half split portion 50d and a left half split portion 50e. The right half split portion 50d and the left half split portion 50e are connected to each other by a plurality of mounting screws 50f. The right half split portion 50d and the left half split portion 50e can be separated by removing the plurality of mounting screws 50f. By separating the right half split portion 50d and the left half split portion 50e, the inside of the detachable portion 50 can be exposed. As shown in FIG. 15, a water supply port 50b and a contact portion 50c that circularly surrounds the periphery of the water supply port 50b are provided at the bottom of the attachment / detachment portion 50 on the inner peripheral side. The water supply port 50b can extend downward in a tubular shape to allow 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 50b. The opening / closing cock 53 is integrally connected to the opening / closing lever 52 exposed to the outside of the fixed cover 12. The opening / closing cock 53 and the opening / closing lever 52 are supported by the fixed cover 12 so as to be rotatable around an axis extending in the left-right direction. An insertion hole 53a penetrates the central portion of the opening / closing cock 53. A water pipe 51 is provided below the opening / closing cock 53. The water distribution pipe 51 is arranged so as to extend substantially downward. A water injection port 54 is opened at the end of the water distribution pipe 51. A water supply port 50b, an insertion hole 53a of the opening / closing cock 53, and a water distribution pipe 51 form a water supply path 58 capable of supplying cutting fluid from the upper part of the attachment / detachment portion 50 to the water injection port 54. As shown in FIG. 6, the water injection port 54 opens toward the side surface of the lower front side of the rotary cutting tool 11 corresponding to the cutting start portion.

As shown in FIG. 13, the open / close lever 52 is rotated to the closed position. As a result, the insertion hole 53a extends in a direction intersecting the extension direction of the water supply port 50b and the water distribution pipe 51. Therefore, the opening / closing cock 53 shuts off the water supply path 58 between the water supply port 50b and the water distribution pipe 51. As shown in FIG. 14, the open / close lever 52 is rotated to the open position. As a result, the insertion hole 53a extends along the extension direction of the water supply port 50b and the water distribution pipe 51. As a result, the insertion hole 53a connects the water supply path 58 between the water supply port 50b and the water distribution pipe 51. Thus, water can be supplied from the water supply port 50b to the water injection port 54 via the insertion hole 53a and the water distribution pipe 51.

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

As shown in FIG. 1, a nozzle 60 connected to the tap water hose 63 can be attached to the attachment / detachment portion 50. As shown in FIGS. 2 and 5, the nozzle 60 attached to the attachment / detachment portion 50 is inclined rearward as it goes upward. As shown in FIG. 3, a tank 70 in which a liquid such as water is stored can be attached to the attachment / detachment portion 50. The tank 70 attached to the attachment / detachment portion 50 has a longitudinal direction in a direction in which the tank 70 is inclined rearward as it goes upward. In this way, the nozzle 60 and the tank 70 shown in FIG. 10 can be appropriately selected and attached to the attachment / detachment portion 50.

As shown in FIG. 1, the nozzle 60 has a cylindrical nozzle-side attachment / detachment portion 61 that can be attached to / detached from the attachment / detachment portion 50, and a hose attachment portion 62 that can be connected to one end of the tap water hose 63. The other end of the tap water hose 63 is connected to, for example, a tap water port 64. Inside the nozzle 60, a conduit is formed which extends from the end of the hose attachment portion 62 to the end of the nozzle side attachment / detachment portion 61 and allows a liquid such as water to flow. As shown in FIG. 10, the tank-side attachment / detachment portion 71 is attached to a tank 70 capable of storing a liquid such as water. The nozzle-side attachment / detachment portion 61 and the tank-side attachment / detachment portion 71 have the same configuration and are provided in the same shape. In the following description, only the configuration of the nozzle-side attachment / detachment portion 61 will be described in detail.

As shown in FIG. 10, a groove-shaped outer peripheral recess 61a (outer peripheral recess 71a) is provided on the outer peripheral surface of the cylindrical nozzle-side attachment / detachment portion 61 (tank-side attachment / detachment portion 71). The outer peripheral recess 61a extends in the circumferential direction of the nozzle-side attachment / detachment 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 attachment / detachment portion 61. Specifically, as shown in FIG. 13, the outer peripheral recess 61a is recessed at a position side by side with the engaging claw 56 when the end portion of the nozzle-side attachment / detachment portion 61 is brought into contact with the contact portion 50c. ing. The outer peripheral recess 61a is recessed in a rectangular cross section that engages with the convex portion of the engaging claw 56. A guide surface 61c is provided on the outer periphery of the end portion of the nozzle-side attachment / detachment portion 61. The guide surface 61c is provided on the end side (lower side in the drawing) of the nozzle-side attachment / detachment portion 61 with respect to the outer peripheral recess 61a. The guide surface 61c is inclined outward in the radial direction from the end side of the nozzle side attachment / detachment portion 61 toward the base side (upper side in the drawing) and extends in a conical surface shape.

As shown in FIG. 13, a valve body 65 and a compression spring 65b are provided inside the nozzle-side attachment / detachment portion 61. The valve body 65 is a columnar shape extending in the longitudinal direction of the nozzle-side attachment / detachment portion 61. The valve body 65 has an O-ring 65a on the base side (upper side in the drawing) of the nozzle-side attachment / detachment portion 61. The valve body 65 has a recess 65c recessed inward in the radial direction on the end side (lower side in the drawing) of the nozzle-side attachment / detachment portion 61 with respect to the O-ring 65a. The compression spring 65b is arranged on the outer periphery of the valve body 65 below the recess 65c. The valve body 65 is urged downward by the compression spring 65b. A small diameter portion is provided on the inner peripheral portion of the nozzle-side attachment / detachment portion 61. A valve seat 61b capable of watertightly contacting the O-ring 65a is provided on the upper portion of the small diameter portion.

As shown in FIG. 15, when the nozzle-side attachment / detachment portion 61 is not attached to the attachment / detachment portion 50, the O-ring 65a of the valve body 65 comes into contact with the valve seat 61b to seal the opening of the nozzle-side attachment / detachment portion 61. .. Therefore, the supply of water from the tap water hose 63 (see FIG. 1) attached to the hose attachment portion 62 to the end of the nozzle-side attachment / detachment portion 61 is cut off. As shown in FIG. 13, the nozzle-side attachment / detachment portion 61 is pushed into the attachment / detachment portion 50 to enter. When the guide surface 61c moves laterally of the engaging claw 56, the engaging claw 56 pushes the engaging 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 the base side rearward in the approach direction projects outward in the radial direction rather than the end side in front of the approach direction. Therefore, the engaging claw 56 retracts outward in the radial direction of the attachment / detachment portion 50 along the guide surface 61c.

Further, when the nozzle-side attachment / detachment portion 61 is made to enter the attachment / detachment portion 50, the outer peripheral recess 61a behind the guide surface 61c in the approach direction moves to the side of the engaging claw 56. The engaging claw 56 is urged inward in the radial direction of the attachment / detachment portion 50 by the compression spring 57 and enters the outer peripheral recess 61a. As a result, the engaging claw 56 and the outer peripheral recess 61a are engaged with each other in a concave-convex shape. The vertical displacement of the nozzle-side attachment / detachment portion 61 with respect to the attachment / detachment portion 50 is regulated by the engagement between the outer peripheral recess 61a and the engagement claw 56. Thus, the nozzle-side attachment / detachment portion 61 is held by the attachment / detachment portion 50.

When the outer peripheral recess 61a and the engaging claw 56 are engaged, the end portion of the valve body 65 comes into contact with the contact portion 50c. The valve body 65 is pushed upward by the contact portion 50c and is displaced upward against the urging force of the compression spring 65b. Therefore, the O-ring 65a is separated from the valve seat 61b, and the recess 65c having a diameter smaller than that of the valve seat 61b is arranged side by side with the valve seat 61b. As a result, water can flow outward from the end of the nozzle-side attachment / detachment portion 61 through the recess 65c.

As shown in FIG. 14, the nozzle-side attachment / detachment portion 61 is attached to the attachment / detachment portion 50, and the opening / closing lever 52 is rotated to the open position. As a result, the water supply port 50b, the insertion hole 53a, the water supply path 58 formed by the water distribution pipe 51, and the recess 65c communicate with each other. Therefore, the water supplied from the tap water hose 63 via the nozzle 60 and the attachment / detachment portion 50 can be poured from the water injection port 54 toward the cutting portion on the side surface of the lower front side of the rotary cutting tool 11 (see FIG. 6).

The removal button 55 shown in FIG. 15 can disengage the nozzle-side attachment / detachment portion 61 and the attachment / detachment portion 50. When the release button 55 is pushed against the urging force of the compression spring 57, the engaging claw 56 is displaced outward in the radial direction of the attachment / detachment portion 50. As a result, the outer peripheral recess 61a and the engaging claw 56 are disengaged. At this time, the valve body 65 is pushed downward by the urging force of the compression spring 65b. As a result, the end portion of the valve body 65 pushes the contact portion 50c, and the reaction thereof pushes the nozzle-side attachment / detachment portion 61 upward. Thus, the nozzle-side attachment / detachment portion 61 is automatically detached from the attachment / detachment portion 50. When the valve body 65 is displaced downward, the O-ring 65a comes into contact with the valve seat 61b, and the opening of the nozzle-side attachment / detachment portion 61 is sealed.

As shown in FIG. 16, the cutting machine 1 can attach the fixed cover 80 instead of the fixed cover 12 (see FIG. 2). The fixed cover 80 has a screwed portion 80a that can be attached to the cover attaching portion 22c (see FIG. 10). A cylindrical dust collecting port 81 that communicates the inside and outside of the fixed cover 80 is provided at the front portion of the fixed cover 80. For example, a dust collecting hose connected to a separately prepared dust collector can be attached to the dust collecting port 81. Therefore, the cutting machine 1 can be used in both wet and dry types by selecting and attaching the fixed cover 12 and the fixed cover 80.

As shown in FIG. 17, a plastic bottle 90 in which a liquid such as water is stored can be attached / detached to / from the attachment / detachment portion 50 instead of the nozzle 60 or the tank 70. The plastic bottle 90 is a plastic beverage container called a PET bottle and made of polyethylene terephthalate (abbreviated as PET). The plastic bottle 90 is consumed as a beverage container in many households, and can be used as a container for storing a cutting fluid such as water after being consumed for beverages. The plastic bottle 90 is attached to the attachment / detachment portion 50 in a posture in which the opening 90a is downward and the bottom portion 90d is upward. The plastic bottle 90 attached to the attachment / detachment portion 50 is slightly inclined rearward as it goes upward.

As shown in FIG. 18, a male screw 90b is provided on the outer circumference of the opening 90a. The bottom 90d is provided with a hole 90c that penetrates the inside and outside of the plastic bottle 90. The hole 90c is drilled with, for example, an electric drill or the like. When the water level of the liquid in the plastic bottle 90 drops, air flows into the plastic bottle 90 through the hole 90c. The inflow of air can prevent the generation of negative pressure 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 tank 70 is provided with a hole 70c that penetrates inside and outside. Air can flow into the tank 70 through the hole 70c. The bottom portion 70d provided with the hole 70c may be the bottom surface of the tank 70, or may be a side surface around the bottom surface. A male screw 70b is provided on the outer circumference of the opening 70a of the tank 70. A female screw 71b that is screwed with the male screw 70b is provided on the upper inner circumference of the tank-side attachment / detachment portion 71. The tank 70 and the tank-side attachment / detachment portion 71 are connected by screwing the male screw 70b and the female screw 71b.

As shown in FIG. 17, the plastic bottle 90 is attached to the attachment / detachment portion 50 via the attachment 91. As shown in FIG. 18, the attachment 91 is composed of a cap 92 on the attachment / detachment portion 50 side (lower side) and an adapter 93 on the plastic bottle 90 side (upper side). The cap 92 and the adapter 93 are separable from each other. The cap 92 and the adapter 93 are substantially cylindrical and allow liquid to pass through the inside. The cap 92 has the same tip shape and internal structure as the nozzle-side attachment / detachment portion 61 (see FIG. 10) or the tank-side attachment / detachment portion 71. As shown in FIG. 19, a groove-shaped outer peripheral recess 92a is provided on the outer periphery of the tip of the cylindrical cap 92. The cap 92 has a guide surface 92c inclined in a conical shape on the outer periphery on the end side (lower side) of the outer peripheral recess 92a. A female screw 92b is provided on the inner circumference of the cap 92 on the base side (upper side).

As shown in FIG. 18, the adapter 93 has a cylindrical cap mounting portion 93c at a lower portion facing the cap 92. Further, the adapter 93 has a cylindrical bottle mounting portion 93d on the upper portion facing the plastic bottle 90. The bottle mounting portion 93d is provided with a diameter larger than that of the cap mounting portion 93c. A male screw 93a to be screwed with the female screw 92b is provided on the outer circumference of the cap mounting portion 93c. A female screw 93b screwed with the male screw 90b is provided on the inner circumference of the bottle mounting portion 93d. By screwing the female screw 92b and the male screw 93a, and the male screw 90b and the female screw 93b, respectively, the cap 92 and the plastic bottle 90 are connected via the adapter 93. The tightening direction of the male screw 93a with respect to the female screw 92b and the tightening 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 cap 92 are connected via the adapter 93. When the cap 92 is brought into the attachment / detachment portion 50, the guide surface 92c pushes the engaging claw 56 outward in the radial direction of the attachment / detachment portion 50 against the urging force of the compression spring 57. When the cap 92 is further inserted into the attachment / detachment portion 50, the engaging claw 56 urged inward in the radial direction of the attachment / detachment portion 50 by the compression spring 57 enters the outer peripheral recess 92a. As a result, the engaging claw 56 and the outer peripheral recess 92a are engaged with each other in a concave-convex shape. Thus, the cap 92 is held by the attachment / detachment portion 50 without tools. When the cap 92 is removed from the attachment / detachment portion 50, the removal button 55 is pushed against the urging force of the compression spring 57 to displace the engaging claw 56 outward in the radial direction of the attachment / detachment portion 50. The cap 92 automatically pops out from the attachment / detachment portion 50 by the urging force of the compression spring 65b that urges the valve body 65 toward the end side (downward).

According to the cutting machine 1 of the present embodiment described above, the rotary cutting tool 11, the cutting machine main body 10 that rotatably supports the rotary cutting tool 11, and the fixing that is attached to the cutting machine main body 10 and covers the periphery of the rotary cutting tool 11. It has a cover 12. The fixed cover 12 includes a water injection port 54 that injects a liquid such as a cutting fluid into the cutting portion of the rotary cutting tool 11, an attachment / detachment portion 50 that communicates with the water injection port 54 and can supply the liquid to the water injection port 54, and an attachment / detachment portion 50. It has a support portion 50a to support. The attachment / detachment portion 50 can attach / detach the nozzle 60 that can be connected to the tap water hose 63 without tools.

Therefore, the tap water hose 63 capable of supplying a liquid such as water for a long time or in a large amount can be easily connected to the fixing cover 12. Further, the tap water hose 63 can be easily removed from the fixing cover 12 without a tool. Therefore, the operability of attaching / detaching the tap water hose 63 from the cutting machine 1 is improved.

Further, according to the cutting machine 1, the attachment / detachment portion 50 can selectively connect the nozzle 60 and the tank 70 in which the liquid is stored. Therefore, the nozzle 60 and the tank 70 connected to the tap water hose 63 can be selected according to the application. When supplying a liquid such as water for a long time or in a large amount, the nozzle 60 can be attached to the attachment / detachment portion 50 and used. When the amount of water used is small or when it is difficult to extend the tap water hose 63, the tank 70 can be attached to the detachable portion 50 for use. This improves the usability of the cutting machine 1.

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

Further, according to the cutting machine 1, the cutting machine main body 10 is gripped by a user located behind. The attachment / detachment portion 50 is provided in front of the fixed cover 12. Therefore, the attachment / detachment portion 50 is provided at a position far from the user and close to the portion where the rotary cutting tool 11 starts cutting (cutting start portion). Therefore, it is easy to inject water or the like into the cutting start site. Chips are likely to be generated at the cutting start site. Therefore, chips can be effectively removed from the rotary cutting tool 11 by injecting water or the like into the cutting start site. Further, the cutting start site tends to have a large resistance at the time of cutting and easily generate heat. Therefore, the rotary cutting tool 11 can be effectively cooled by injecting water or the like into the cutting start portion.

Further, according to the cutting machine 1, the attachment / detachment portion 50 has a support portion 50a that is inclined rearward as it goes upward. Therefore, the nozzle 60 or the tank 70 attached to the attachment / detachment portion 50 is inclined upward toward the user side. Therefore, the operability when the user attaches / detaches the nozzle 60 or the tank 70 is good. Further, the tap water hose 63 connected to the nozzle 60 can be extended toward the rear so as not to hinder the cutting traveling direction.

Further, the cutting machine 1 has a half-split structure that is divided into a right half-split portion 50d and a left half-split portion 50e in the left-right direction intersecting the attachment / detachment direction of the nozzle 60 with respect to the attachment / detachment portion 50. The detachable portion 50 can be exposed by disassembling the support portion 50a into a half-split state. Therefore, for example, when chips or the like enter the attachment / detachment portion 50, the support portion 50a can be disassembled into a half-split state to expose the attachment / detachment portion 50. As a result, the detachable portion 50 can be easily cleaned and clogging with chips and the like can be prevented.

Further, according to the cutting machine 1, the attachment / detachment portion 50 has an engaging claw 56 that protrudes inward in the radial direction of the attachment / detachment portion 50 and is displaceable in the radial direction of the attachment / detachment portion 50, and the engagement claw 56 of the attachment / detachment portion 50. It has a compression spring 57 that urges inward in the radial direction. On the outer periphery of the nozzle-side attachment / detachment portion 61 of the nozzle 60, an outer peripheral recess 61a that engages with the engaging claw 56 in an uneven manner and a guide surface 61c arranged on the end side of the nozzle 60 with respect to the outer peripheral recess 61a are provided. The guide surface 61c is inclined outward in the radial direction from the end side to the base side of the nozzle 60.

Therefore, when the nozzle-side attachment / detachment portion 61 of the nozzle 60 is pushed into the attachment / detachment portion 50, the guide surface 61c retracts the engaging claw 56 to the outside in the radial direction of the attachment / detachment portion 50 against the urging force of the compression spring 57. As a result, the nozzle-side attachment / detachment portion 61 can be further entered into the attachment / detachment portion 50. When the guide surface 61c enters the back side of the attachment / detachment portion 50 from the engagement claw 56, the retracted engagement claw 56 is urged by the compression spring 57 and protrudes inward in the radial direction of the attachment / detachment portion 50. As a result, the engaging claw 56 engages with the outer peripheral recess 61a of the nozzle 60 in an uneven manner. Thus, the nozzle 60 can be attached to the attachment / detachment portion 50 only by pushing the nozzle 60 into the attachment / detachment portion 50.

Further, according to the cutting machine 1, a water supply path 58 capable of supplying water from the attachment / detachment portion 50 to the water injection port 54, an opening / closing cock 53 for opening / closing the water supply path 58, and an opening / closing cock 53 connected to the outside of the attachment / detachment portion 50. It has an exposed open / close lever 52. The opening / closing cock 53 and the opening / closing lever 52 can rotate about an axis extending in the left-right direction intersecting the water supply path 58. The water supply path 58 is opened and closed by rotating the opening / closing cock 53. Therefore, the opening / closing of the water supply path 58 can be switched only by rotating the opening / closing lever 52. Further, the opening / closing lever 52 is exposed to the outside of the attachment / detachment portion 50. Therefore, the water supply path 58 can be opened and closed from the outside of the attachment / detachment portion 50. As a result, the operability of the operation of opening and closing the water supply path 58 is good.

Further, according to the cutting machine 1, the cutting machine main body 10 has a light 33 that illuminates the cutting portion. Therefore, it is easy to visually recognize whether or not the cutting of the rotary cutting tool 11 into the material to be cut is appropriate. Further, it is easy to visually recognize whether or not the cutting fluid is appropriately applied from the water injection port 54 to the cutting portion of the rotary cutting tool 11. Therefore, the efficiency of the work of cutting the material to be cut while injecting water into the cut portion is improved.

Further, according to the cutting machine 1, the cutting machine 1 has a base 2 and a left-right tilting support shaft 5 that supports the cutting machine main body 10 so as to be tiltable in the left-right direction with respect to the base 2. The light 33 is arranged on the side opposite to the rotary cutting tool 11 with the left-right tilting support shaft 5 interposed therebetween. Therefore, for example, the cutting machine main body 10 is tilted toward the rotary cutting tool 11 with the left-right tilting support shaft 5 as the center. In this tilted posture, the light 33 is located above the rotary cutting tool 11 on the opposite side of the rotary cutting tool 11 with the left / right tilting support shaft 5 interposed therebetween. Therefore, the light 33 irradiates the cutting portion of the rotary cutting tool 11 from above to below. As a result, the visibility of the cut portion can be improved even in the tilted posture.

Further, according to the cutting machine 1, it has a rotary cutting tool 11, a cutting machine main body 10 that rotatably supports the rotary cutting tool 11, and a fixed cover 12 that is attached to the cutting machine main body 10 and covers the periphery of the rotary cutting tool 11. ing. The fixed cover 12 has a water injection port 54 that injects a liquid such as a cutting fluid into the cutting portion, an attachment / detachment portion 50 that communicates with the water injection port 54 and can supply the liquid to the water injection port 54, and a support portion that supports the attachment / detachment portion 50. have. The plastic bottle 90 can be attached to and detached from the detachable portion 50. Therefore, as a source of the liquid to be injected, an inexpensive and easily available plastic bottle 90 can be used as a beverage container consumed in many households. Therefore, even when it is difficult to obtain a bottle dedicated to the cutting machine, the cutting machine 1 can be used wet using the plastic bottle 90. Further, by using the plastic bottle 90, it is possible to select a suitable capacity according to the usage state from various various capacities. Thus, the cutting machine 1 can be used by connecting the inexpensive and convenient plastic bottle 90 to the attachment / detachment portion 50.

Further, according to the cutting machine 1, the plastic bottle 90 has an attachment 91 for being attached to and detached from the attachment / detachment portion 50. A male screw 90b is provided on the outer circumference of the opening 90a of the plastic bottle 90. The attachment 91 is provided with a female screw 93b that is screwed with the male screw 90b. Therefore, the plastic bottle 90 can be easily attached to and detached from the attachment / detachment portion 50 via the attachment 91. Further, by screwing the male screw 90b and the female screw 93b, the plastic bottle 90 can be easily connected to the attachment 91, and the connection can be easily released.

Further, according to the cutting machine 1, the attachment 91 can be separated into a cap 92 provided so as to be engaged with the attachment / detachment portion 50 and an adapter 93 for connecting the cap 92 and the plastic bottle 90. Therefore, plastic bottles 90 of various shapes and sizes can be connected to the cap 92 via the adapter 93. Further, the cap 92 can be provided in the same shape as the nozzle-side attachment / detachment portion 61 attached to the end of the tap water hose 63 or the tank-side attachment / detachment portion 71 attached to the tank 70, for example. This expands the range of selection of the source of the liquid to be injected. Therefore, the cutting machine 1 is easy to use.

Further, according to the cutting machine 1, the adapter 93 has a bottle mounting portion 93d to which the plastic bottle 90 is mounted and a cap mounting portion 93c to which the cap 92 is mounted. The bottle mounting portion 93d has a larger diameter than the cap mounting portion 93c. Therefore, the opening 90a of the plastic bottle 90 having a relatively large opening diameter can be connected to the cap 92 via the adapter 93.

Further, according to the cutting machine 1, the plastic bottle 90 has a hole 90c in the bottom 90d. Therefore, air can be introduced into the plastic bottle 90 through the hole 90c. When the liquid is discharged from the plastic bottle 90 by water injection and the water level drops, a negative pressure is generated in the air inside the plastic bottle 90. This negative pressure can act as a brake to reduce the water injection rate. Since air can freely flow into the plastic bottle 90 from the hole 90c, it is possible to prevent the generation of negative pressure in the plastic bottle 90. This enables smooth water injection using the plastic bottle 90.

Further, according to the cutting machine 1, the tank 70 has a hole 70c in the bottom 70d. Therefore, air can be introduced into the tank 70 through the hole 70c. Therefore, smooth water injection is possible not only when the plastic bottle 90 is used but also when the tank 70 is used.

Various changes can be made to the cutting machine 1 of the present embodiment described above. A diamond wheel is exemplified as the rotary cutting tool 11. Instead of this, for example, a disk-shaped grindstone or a tip saw may be provided as the rotary cutting tool 11. Although the fixed cover 12 that can be attached to and detached from the cutting machine main body 10 has been illustrated, the fixed cover 12 may be provided integrally with the cutting machine main body 10. The configuration in which the water injection port 54 is arranged on the side of the lower front side of the rotary cutting tool 11 is illustrated. Instead of this, for example, the water injection port 54 may be arranged on the side of the lower rear side of the rotary cutting tool 11. Further, for example, water injection ports 54 may be provided at a plurality of locations around the rotary cutting tool 11. An engaging claw 56 and an outer peripheral recess 61a which are engaged with each other and have a rectangular cross section are illustrated. Instead of this, for example, an engaging claw 56 having a U-shaped cross section, a wedge shape, a sawtooth shape, or the like and engaging with each other and an outer peripheral recess 61a may be used.

Although the plastic bottle 90 exemplifies a PET bottle as a plastic bottle for commercial beverages, it may be a bottle made of a plastic other than polyethylene terephthalate. One hole 70c, 90c may be provided, or a plurality of holes 70c and 90c may be provided. A stopper or valve capable of sealing the holes 70c and 90c may be provided so that the liquid does not leak from the holes 70c and 90c when the liquid is poured into the tank 70 and the plastic bottle 90. Instead of the attachment 91 that can be separated from the cap 92 and the adapter 93, an attachment provided integrally may be used. Although the configuration in which the plastic bottle 90 can be attached to and detached from the attachment / detachment portion 50 without a tool has been illustrated, a configuration using a tool such as a screwdriver may be used instead.

1 ... Cutting machine (portable cutting machine for masonry)
2 ... Base 3 ... Front tilting support part, 3a ... Left and right tilting fixing screw 4 ... Rear side tilting support part, 5 ... Left and right tilting support shaft (rotation center axis), 6 ... Vertical swing support shaft 7 ... Depth guide, 8 ... Vertical swing fixing lever, 8a ... Lever shaft 10 ... Cutting machine main body 11 ... Rotating cutting tool 12 ... Fixed cover, 12a ... Screw fastening part, 12b ... Hooking part 13 ... Fixing screw, 14 ... Outer flange, 15 ... Inner flange 16 ... Spindle 20 ... Motor housing, 20a ... Intake port, 20b ... Rib 21 ... Electric motor, 21a ... Motor shaft 22 ... Gear housing, 22a ... Reduction gear mechanism, 22b ... Exhaust port, 22c ... Cover mounting part 23 ... Shaft lock 24 ... Controller 30 ... Handle housing, 30a ... Handle part 31 ... Switch lever, 32 ... Lock-off button, 33 ... Light 34 ... Adapter mounting part, 35 ... Communication adapter 40 ... Battery mounting part, 41 ... Rechargeable battery 42 ... Hex bar spanner , 43 ... Spanner mounting part 50 ... Detachable part, 50a ... Support part, 50b ... Water supply port, 50c ... Contact part 50d ... Right half split part, 50e ... Left half split part, 50f ... Mounting screw 51 ... Water distribution pipe 52 ... Open / close lever 53 ... Open / close cock, 53a ... Insertion hole 54 ... Water injection port 55 ... Removal button 56 ... Engagement claw 57 ... Compression spring (biasing member)
58 ... Water supply path 60 ... Nozzle 61 ... Nozzle side attachment / detachment part, 61a ... Outer peripheral recess, 61b ... Valve seat, 61c ... Guide surface 62 ... Hose attachment part 63 ... Tap water hose 64 ... Water outlet 65 ... Valve body, 65a ... O-ring, 65b ... compression spring, 65c ... recess 70 ... tank 70a ... opening, 70b ... male screw, 70c ... hole, 70d ... bottom 71 ... tank side attachment / detachment part, 71a ... outer peripheral recess, 71b ... female screw 80 ... fixed cover, 80a ... Screwed part, 81 ... Dust collection port 90 ... Plastic bottle (Plastic bottle for commercial beverages, PET bottle)
90a ... Opening, 90b ... Male screw, 90c ... Hole, 90d ... Bottom 91 ... Attachment 92 ... Cap (bottle side attachment / detachment part)
92a ... outer peripheral recess, 92b ... female screw, 92c ... guide surface 93 ... adapter 93a ... male screw, 93b ... female screw, 93c ... cap mounting part, 93d ... bottle mounting part W ... material to be cut

Claims (16)

A portable cutting machine for masonry
It has a rotary cutting tool, a cutting machine main body that rotatably supports the rotary cutting tool, and a fixed cover that is attached to the cutting machine main body and covers the periphery of the rotary cutting tool.
The fixed cover includes a water injection port for injecting a liquid such as a cutting fluid into the cutting portion, an attachment / detachment portion that communicates with the water injection port and can supply the liquid to the water injection port, and a support portion that supports the attachment / detachment portion. Have and
The attachment / detachment part is a portable cutting machine for masonry in which a nozzle that can be connected to a tap water hose can be attached / detached without a tool. The masonry portable cutting machine according to claim 1.
The attachment / detachment portion is a portable masonry cutting machine capable of selectively connecting the nozzle and the tank in which the liquid is stored. The masonry portable cutting machine according to claim 2.
The nozzle has a nozzle-side attachment / detachment portion that can be attached / detached to the attachment / detachment portion.
The tank has a removable tank-side attachment / detachment portion on the attachment / detachment portion.
A portable cutting machine for masonry in which the nozzle-side attachment / detachment portion and the tank-side attachment / detachment portion have the same shape. The masonry portable cutting machine according to any one of claims 1 to 3.
The cutting machine body is gripped by a user located at the rear.
The attachment / detachment portion is a portable cutting machine for masonry provided in front of the fixed cover. The masonry portable cutting machine according to claim 4.
The detachable portion is a portable masonry cutting machine having the support portion that is inclined rearward as it goes upward. The masonry portable cutting machine according to any one of claims 1 to 5.
It has a half-split structure that is divided into a direction that intersects with the attachment / detachment direction of the nozzle with respect to the attachment / detachment portion.
The detachable portion is a portable masonry cutting machine that can be exposed by disassembling the support portion in half. The masonry portable cutting machine according to any one of claims 1 to 6.
The attachment / detachment portion has an engaging claw that protrudes inward in the radial direction of the attachment / detachment portion and is displaceable in the radial direction of the attachment / detachment portion, and the engaging claw is urged inward in the radial direction of the attachment / detachment portion. Has an urging member to
On the outer periphery of the nozzle, an outer peripheral recess that engages with the engaging claw in an uneven manner and a guide surface arranged on the end side of the nozzle with respect to the outer peripheral recess are provided.
The guide surface is a portable masonry cutting machine that is inclined outward in the radial direction from the end side to the base side of the nozzle. The masonry portable cutting machine according to any one of claims 1 to 7.
It has a water supply path capable of supplying water from the attachment / detachment portion to the water injection port, an opening / closing cock for opening / closing the water supply path, and an opening / closing lever connected to the opening / closing cock and exposed to the outside of the attachment / detachment portion.
The opening / closing cock and the opening / closing lever are rotatable about an axis intersecting the water supply path, and the water supply path is opened / closed by rotating the opening / closing cock. The masonry portable cutting machine according to any one of claims 1 to 8.
A portable cutting machine for masonry having a light illuminating the cutting portion on the cutting machine body. The masonry portable cutting machine according to claim 9.
It has a base and a rotation center axis that slantably supports the cutting machine body with respect to the base.
The light is a portable masonry cutting machine arranged on the opposite side of the rotary cutting tool with the rotation center axis in between. A portable cutting machine for masonry
It has a rotary cutting tool, a cutting machine main body that rotatably supports the rotary cutting tool, and a fixed cover that is attached to the cutting machine main body and covers the periphery of the rotary cutting tool.
The fixed cover includes a water injection port for injecting a liquid such as a cutting fluid into the cutting portion, an attachment / detachment portion that communicates with the water injection port and can supply the liquid to the water injection port, and a support portion that supports the attachment / detachment portion. Have and
The attachment / detachment portion is a portable cutting machine for masonry to which a plastic bottle for a commercially available beverage can be attached / detached. The masonry portable cutting machine according to claim 11.
It has an attachment for attaching and detaching the plastic bottle for commercial beverages to the detachable portion.
A male screw is provided on the outer circumference of the opening of the plastic bottle for commercial beverages.
The attachment is a portable cutting machine for masonry provided with a female screw to be screwed with the male screw. The masonry portable cutting machine according to claim 12.
The attachment is a portable masonry cutting machine that can be separated into a cap provided so as to be engaged with the detachable portion and an adapter for connecting the cap and the plastic bottle for commercial beverages. The masonry portable cutting machine according to claim 13.
The adapter has a bottle attachment portion to which the commercially available plastic bottle for beverage is attached and a cap attachment portion to which the cap is attached.
A portable cutting machine for masonry in which the bottle mounting portion has a larger diameter than the cap mounting portion. The masonry portable cutting machine according to any one of claims 11 to 14.
The plastic bottle for commercial beverages is a portable cutting machine for masonry having a hole at the bottom. The masonry portable cutting machine according to claim 2 or 3.
The tank is a portable masonry cutting machine having a hole at the bottom.

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