BR102021002058A2 - PORTABLE CUTTING DEVICE FOR CUTTING STONE - Google Patents

Abstract

Portable cutting device for cutting stone. a cutting device 1 includes a rotating cutting blade 11, a cutting device main body 10 rotatably supporting the rotating cutting blade 11 and a fixing cap 12 attached to the cutting device main body 10 and covering the cutting blade swivel 11. securing cap 12 includes an ejection port 54, an attachment/detachment portion 50, and a support portion 50a. ejection port 54 ejects liquid, such as cutting liquid, to a cutting position of the rotating cutting blade 11. Attachment/removal portion 50 communicates with ejection port 54 and supplies the liquid to the ejection port 54, support portion 50a is provided on attachment/detachment portion 50. A nozzle 60 connectable to a water hose can be detachably attached to attachment/detachment portion 50 in a tool-less manner.

Description

PORTABLE CUTTING DEVICE FOR CUTTING STONE CROSS REFERENCE TO RELATED ORDERS

[0001] The present application claims priority to Japanese patent application serial number 2020-047826, filed March 18, 2020, and Japanese patent application serial number 2020-122775, filed July 17 2020, both of which are incorporated herein by reference in their entirety for all purposes.

TECHNICAL FIELD

[0002] The present disclosure generally refers to a portable cutting device for cutting a workpiece such as stone, etc.

FUNDAMENTALS OF THE INVENTION

[0003] A portable cutting device for cutting stone is generally referred to as a cutter. The cutter is used to cut a workpiece such as stone, etc. The portable cutting device for cutting stone includes a base which contacts an upper surface of the workpiece, a main body of the cutting device which is supported by an upper surface of the base and houses an electric motor and a circular rotating cutting blade, which can be a diamond wheel rotating by electric motor. A user moves the handheld cutting device to cut stone in the cutting direction, with the top surface of the workpiece in contact with the base, so that the rotating cutting blade cuts the workpiece. In this way, the cutting work is performed. Some of the portable cutting devices for cutting stone include a water flow type cutting device which is also known as a wet type cutting device. A water flow type cutting device is one in which liquid, such as water, flows into a cutting position while cutting work is performed.

[0004] With regard to a portable wet-type cutting device for cutting stone, a tank to supply, for example, water is connected thereto. Publicly available Japanese Patent Publication No. 2013-82104 and European Patent Application No. 2236234 disclose a portable wet-type cutting device for cutting stone to which a tank can be attached. A tank for the portable wet-type cutting device disclosed in the above document is bolted to a main body of the cutting device. Because of this configuration, it is necessary to separately supply a tool to detach the tank. In contrast, in the portable wet-type cutting device disclosed in the latter document, a tank can be detached from the main body of the cutting device without the use of a specific tool.

[0005] However, the amount of water that can be stored in the tank has limited volume. So, every time the tank is empty, it is necessary to remove the tank from the main body of the cutting device and fill the tank with water. Because of this, there has been a need for a portable wet-type cutting device for cutting stone in which water can be supplied for a long time or so that a large amount of water can be supplied. Publicly available Japanese Patent Publication No. 2017-217794 discloses a portable wet-type cutting device for cutting stone, to which a city-supplied water hose can be connected. However, it is necessary to separately supply a specific tool to detach the hose from the cutting device. So, in terms of detachability, there is room for improvement. The tool-free detachable frame disclosed in European Patent Application No. 2236234 was designed taking into account the amount of water in the tank and a way of opening the tank. However, using this tool-less detachment structure, it can still be difficult to separate a hose that can be used to supply water for a long time, or in a large enough quantity, to the cutting device.

[0006] Thus, as a result of at least the aforementioned shortcomings, there is a need for a portable cutting device for cutting stone, in which a source of water to flow to a cutting position of the workpiece can be easily fixed and detached. from there.

SUMMARY

[0007] According to a feature of the present disclosure, a portable cutting device for cutting stone comprises a rotating cutting blade, a main body of the cutting device which rotatably supports the rotating cutting blade and a fixing cap attached to the body main part of the cutting device and covering the rotary cut. The clamping cover includes an ejection port that ejects liquid, such as cutting liquid, to a rotating cutting blade cutting position, a clamping/detaching part that communicates with the ejection port and supplies the liquid to the ejection port and a support part provided on the attachment/detachment part. Furthermore, a nozzle connectable to a city water hose is configured to be detachably attached to the attachment/detachment part in a tool-less manner.

[0008] Due to this configuration, the city water hose, through which water can be supplied for a long time and/or in large quantities, can be easily connected to the fixing cap without tools. In addition, the city water hose can be easily removed from the fixing cap without tools. Thus, the operability to detachably connect the city water hose to the portable cutting device can be improved.

[0009] According to another feature of the present disclosure, the spout or a tank for storing the liquid is selectively attached to the attachment/detachment part. Due to this configuration, the nozzle, which can be connected to the city water hose or the tank, can be selected depending on the intended use. In more detail, when liquid such as water is supplied for a long time or in large quantity, the nozzle can be connected to the clamping/detaching part. On the other hand, when the amount of water needed is small or the job site is too far from a city water tap, the tank can be attached to the fixing/detaching part. Thus, the usability of the portable cutting device can be improved.

[00010] According to another feature of the present disclosure, the nozzle includes an attachment/detachment part from the nozzle side detachably attached to the attachment/detachment part. The tank includes an attachment/detachment part on the side of the tank detachably attached to the attachment/detachment part. Also, the spout side clamping/detaching part has the same configuration as the tank side clamping/detaching part. Because of this same configuration, the nozzle connected to the city water hose or the tank can be connected and disconnected from the clamping/detaching part in a selectable manner depending on the intended use. Furthermore, clamping/detaching can be performed without using a specific clamping tool and without a complicated operation to clamp and/or detach them.

[00011] According to another feature of the present disclosure, the tank includes a hole in a bottom thereof. Due to this configuration, outside air can flow into the tank. Thus, a smooth ejection can be accomplished by using the tank as well as a plastic beverage bottle.

[00012] According to another feature of the present disclosure, the main body of the cutting device is held by a user situated behind it and the attachment/detachment part is provided in a front portion of the attachment cover. Due to this configuration, the clamping/detaching part is located away from the user and close to a position where the rotating cutter blade starts to cut the workpiece (cut start position). Consequently, liquid such as water can be easily ejected towards the cutting start position. Previously, cutting powder may have been produced at the cutting start position. Thus, by ejecting the liquid, such as water, towards the cutting start position, the cutting dust can be effectively removed from the rotating cutting blade 11. Also, previously, the cutting resistance may have been high and the heat may have been produced at the cutting start position. Thus, by ejecting liquid such as water towards the cutting start position, the rotating cutting blade 11 can be effectively cooled.

[00013] According to another feature of the present disclosure, the attachment/detachment part which includes the support part which is angled backwards as the support part extends upwards. Due to this configuration, the spout or tank attached to the clamping/detaching part is angled so that an upper part faces the user. Consequently, good operability can be obtained when the nozzle or tank is turned on and detached from the attachment/detachment part by the user. Also, if the city water hose is connected to the nozzle, it can extend to the back where it will not interfere with the workpiece cutting work.

[00014] In accordance with another feature of the present disclosure, the support portion is configured to have a halved structure wherein a divided right half portion of the support portion is separated from a divided left half portion of the support portion. in a direction that intersects a direction in which the nozzle is detachably attached to the attachment/detachment portion. Furthermore, the attachment/detachment portion is exposed to the outside when the support portion is divided into a right half and a left half portion. Due to this configuration, for example, when cutting powder enters the clamping/detaching portion, the support portion can be divided into left and right half divided compartments to expose the support portion to the outside. In this way, the attachment/detachment portion can be easily cleaned to avoid clogging with cutting dust.

[00015] In accordance with another feature of the present disclosure, the attachment/detachment portion includes an engaging jaw that projects inwardly in a radial direction of the attachment/detachment portion and which is movable in the radial direction of the attachment/detachment portion. detachment. The clamping/detaching portions also include a tilting member biasing the latching jaw inwardly in the radial direction of the clamping/detaching portion. The spout includes an outer circumferential recess configured to engage the engaging jaw, due to a protrusion/recess configuration. The nozzle also includes a guide surface disposed closer to one side of the nozzle end than the outer circumferential recess. Furthermore, the guide surface is angled outward in a radial direction of the nozzle as the guide surface extends from the end portion of the nozzle towards a base portion of the nozzle.

[00016] Because of this configuration, when the nozzle side clamping/detaching portion is pushed towards the clamping/detaching portion, the guide surface pushes the latching jaw out in the radial direction of the clamping/detaching portion , against the biasing force of the compression spring. Consequently, the nozzle side clamping/detaching portion can be moved further to the clamping/detaching portion side. When the guide surface is moved further to be displaced below the engaging jaw, the engaging jaw moves inwardly in the radial direction of the clamping/detaching portion by the deflection force of the compression spring. Then, the engaging jaw engages the outer circumferential recess, due to the boss/recess configuration. In this way, only the operation of pushing the nozzle to the clamping/detaching part is required to fix the nozzle to the clamping/detaching part.

[00017] In accordance with another feature of the present disclosure, the clamping/detaching portion includes a fluid flow path through which cutting fluid flows from an upper portion of the clamping/detaching portion to the ejection port. The clamping/detaching part also includes an open/close cock that opens and closes the fluid flow path and an open/close lever that is connected to the open/close cock so as to be exposed to the outside of the fixing/detaching part. In addition, the on/off cock and the on/off lever are configured to rotate around an axis that crosses the fluid flow path. The fluid flow path is opened and closed by rotating the on/off cock. Due to this configuration, only one rotation of the open/close lever is required to toggle an open/close flow path. In addition, the opening/closing lever protrudes from the clamping/detaching part. Consequently, the flow path can be opened/closed outside the clamping/detaching portion. Thus, good operability to open/close the flow path can be obtained.

[00018] According to another feature of the present disclosure, the main body of the cutting device includes a light for illuminating the cutting position of the rotating cutting blade. Due to this configuration, it can be visually and easily confirmed whether the cutting position of the workpiece cut by the rotating cutting blade is suitable or not. Furthermore, it can be visually and easily confirmed whether the cutting liquid is being ejected to the cutting position of the workpiece cut by the rotating cutting blade properly or not. Thus, the efficiency to perform cutting work while cutting liquid is being ejected to the cutting position can be improved.

[00019] According to another feature of the present disclosure, the portable cutting device further comprises a base above which the main body of the cutting device is supported. The portable cutter also further comprises a tilt support shaft supporting the main body of the cutter at an angle with respect to the base. Furthermore, the light is arranged on the opposite side of the rotating cutting blade to the tilt support axis. Due to this configuration, for example, the main body of the cutting device can be tilted on the side of the rotating cutting blade around the tilt support axis. In this situation, i.e. when the main body of the cutting device is tilted to the side of the rotating cutting blade, because the light is arranged on the rotating cutting blade 11, the light can illuminate the cutting position of the cutting blade. top rotary. Thus, good visibility of the cutting position can be obtained even when the cutting device is tilted.

[00020] According to another feature of the present disclosure, a portable cutting device for cutting stone comprises a rotating cutting blade, a main body of the cutting device which rotatably supports the rotating cutting blade and a fixing cap attached to the body main part of the cutting device and covering the rotary cut. In addition, the clamping cap includes an ejection port that is configured to eject a liquid, such as cutting liquid, into a cutting position of the rotating cutting blade. The clamping cap also includes a clamping/detaching part that communicates with the ejection port to deliver liquid to the ejection port. The fixing cover additionally includes a support part provided in the fixing/detaching part. Furthermore, a commercially available plastic beverage bottle is configured to be detachably attached to the attachment/detachment portion. Due to this configuration, the plastic beverage bottle, which is readily available at an inexpensive price and is used as a beverage container in many homes, can be used as a supply source for the liquid to be ejected. Thus, in the event that a dedicated bottle for the cutting device is not readily available, the plastic beverage bottle can be attached to the cutting device to allow it to be used as a wet-type cutting device. Furthermore, by using the plastic beverage bottle, a suitable plastic beverage bottle with a required liquid capacity can be selected from a variety of plastic beverage bottles with different capacities depending on the intended use. Thus, a plastic beverage bottle which is cheap and convenient can be fixed to the clamping/detaching part when the cutting device is used.

[00021] According to another feature of the present disclosure, the portable cutting device further comprises an accessory by means of which the commercially available plastic beverage bottle can be detachably attached to the attachment/detachment portion. Furthermore, the commercially available plastic beverage bottle is provided with a male thread on the outer circumferential periphery of an opening therein. The accessory is provided with a female thread configured to engage the male thread of a commercially available plastic beverage bottle. Due to this configuration, the plastic beverage bottle can be easily and removably attached to the attachment/detachment portion by means of the connection. Furthermore, the plastic beverage bottle can be easily fixed to the connection by engaging the male thread with the female thread. Furthermore, it can be easily detached from the connection by disengaging the male thread from the female thread.

[00022] In accordance with another feature of the present disclosure, the connection includes a cap engageable with the attachment/detachment portion and an adapter attachable to the commercially available plastic beverage bottle. Due to this configuration, the plastic beverage bottle, which can have a variety of shapes and sizes, can be attached to the cap via the adapter. Furthermore, the cap has substantially the same configuration as, for example, the spout-side attachment/detachment portion, which can be attached to the end of the city water hose, or as the spout-side attachment/detachment portion. tank, which can be attached to the tank. Consequently, a source of the liquid to be ejected can be widely selected and thus good usability of the cutting device can be obtained.

[00023] In accordance with another feature of the present disclosure, the adapter includes a bottle-side attachment portion to which the commercially available plastic beverage bottle is attached and includes a cap-side attachment portion to which the cap is attached. fixed. Furthermore, the bottle-side fixing part has a larger diameter than the cap-side fixing part. Due to this configuration, a plastic beverage bottle with an opening having a relatively large opening ratio can be attached to the cap by means of the adapter.

[00024] In accordance with another feature of the present disclosure, the commercially available plastic beverage bottle includes a hole in a bottom thereof. Due to this configuration, outside air can flow into the plastic beverage bottle through the hole. When liquid is discharged from a typical plastic beverage bottle and the liquid level is reduced, negative pressure can be produced inside the plastic bottle. Negative pressure can act as a brake to weaken the liquid ejection velocity. However, because of the presence of the orifice, outside air can flow into the plastic beverage bottle through the orifice, thus preventing negative pressure from being produced inside the plastic beverage bottle. Thus, smooth ejection can be performed when using the plastic beverage bottle with an orifice.

BRIEF DESCRIPTION OF THE DRAWINGS

[00025] FIG. 1 is a general perspective view of a cutting device to which a nozzle is attached in accordance with a present embodiment.

[00026] FIG. 2 is a left side view of the cutting device to which the nozzle is attached.

[00027] FIG. 3 is a left side view of the cutting device to which a tank is attached.

[00028] FIG. 4 is a right side view of the cutting device.

[00029] FIG. 5 is a top view of the cutting device.

[00030] FIG. 6 is a bottom view of the cutting device.

[00031] FIG. 7 is a front view of the cutting device.

[00032] FIG. 8 is a front view of the cutting device, of which the main body of the cutting device is inclined to the left.

[00033] FIG. 9 is a rear view of the cutter, for which a rechargeable battery is separated from the main body of the cutter.

[00034] FIG. 10 is an exploded perspective view of the cutter.

[00035] FIG. 11 is a right side view of a clamping cap and nozzle of the cutting device.

[00036] FIG. 12 is a right side view of the attachment cap and nose of the cutter, where a split right half portion of a support portion is separated from a split left half housing.

[00037] FIG. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 11, showing a longitudinal sectional view of a clamping/detaching portion and the spout when an open/close lever is closed.

[00038] FIG. 14 is a view corresponding to the cross-sectional view taken along line XIII-XIII of FIG. 11, showing the longitudinal sectional view of the clamping/detaching portion and the spout when the open/close lever is open.

[00039] FIG. 15 is a view corresponding to the cross-sectional view taken along line XIII-XIII of FIG. 11 , showing the longitudinal sectional view of the attachment/detachment portion and the nozzle as the nozzle is detached from the attachment/detachment portion.

[00040] FIG. 16 is a left side view of the cutting device to which a fastening cap with a dust collection opening is attached.

[00041] FIG. 17 is a left side view of the cutting device to which a plastic beverage bottle is attached.

[00042] FIG. 18 is an exploded perspective view of the cutter.

[00043] FIG. 19 is a longitudinal sectional view of the attachment/detachment portion to which the plastic beverage bottle is attached.

DETAILED DESCRIPTION

[00044] The detailed description presented below, when considered with the accompanying drawings, is intended to be a description of exemplary embodiments of the present invention and is not intended to be restrictive and/or represent the only embodiments in which the present invention may be practiced. . The term "exemplary" used throughout this specification means "serving as an example, instance or illustration" and should not necessarily be interpreted as preferred or advantageous over other exemplary embodiments. The detailed description includes specific details for the purpose of providing a complete understanding of exemplary embodiments of the invention. It will be apparent to those skilled in the art that exemplary embodiments of the invention can be practiced without these specific details. In some cases, these specific details refer to well-known structures, components, and/or devices that are shown in block diagram form, in order to avoid obscuring significant aspects of the exemplary embodiments presented in this document.

[00045] Representative non-limiting embodiments in accordance with the present disclosure will be described with reference to FIGS. 1 to 19. FIGS. 1 and 2 show a cutting device 1 (eg, a portable cutting device for cutting stone) used to cut a part W, such as stone. Such cutting device 1 may generally be referred to as a cutter. Cutting device 1 can be portable and a user can perform cutting work while holding cutting device 1, for example, with one hand. In a wet type 1 cutting device, liquid such as water can flow to a cutting position of the workpiece W while cutting work is being performed. The W part can be primarily a stone material. The W workpiece can include concrete, asphalt, brick, etc. Liquids such as water, etc., can prevent cutting dust from spreading and can cool the cutting position of the workpiece W while cutting work is being performed.

[00046] As shown in FIG. 2, the cutting device 1 may include a base 2 which contacts an upper surface of the workpiece W. The cutting device 1 may also include a cutting device main body 10 which is supported above the base 2. cutting 1 may include a rotating cutting blade 11, which may be a diamond wheel. In FIG. 2, a user can be situated behind cutter 1 and hold cutter 1. In the following explanation, a direction in which cutting work proceeds is a forward direction and a direction opposite to the front direction is a rear direction . The user is positioned towards the rear. A left direction and a right direction are based on the user's position.

[00047] As shown in FIGS. 1 and 2, the main body of the cutting device 10 can be supported on an upper surface of the base 2, for example, by means of a front tilt support 3 and a rear tilt support 4, respectively, provided on a front and a rear part of the base 2. The front tilt support 3 and the rear tilt support 4 may, respectively, include a left-right tilt support axis (central axis of rotation) 5 that extends in a front-rear direction. Both the front tilt support 3 and the rear tilt support 4 can be provided coaxial with each other. The cutting main body 10 can be tilted in a left-right direction about the left-right tilt support axis 5. For example, as shown in FIG. 8, the main body of the cutting device 10 can be tilted about 45° in a leftward direction. By tilting the main body of the cutting device 10 in the left-right direction, an oblique cutting, in which the rotating cutting blade 11 is inclined with respect to a lower surface of the base, can be performed. A left-right tilting fixing screw 3a can be provided on the front tilting bracket 3. By turning the left-right tilting fixing screw 3a in a loosening direction, the main body of the cutting device 10 can be tilted in the direction of loosening. left-right direction. On the other hand, by turning the tilt clamp screw from left to right 3a in a tightening direction, the main body of the cutting device 10 can be fixed at a desired tilt angle.

[00048] As shown in FIG. 2, an up and down swing support shaft 6 extending in the left-right direction can be provided behind the front tilt support 3. The main body of the cutting device 10 can be swing in a top-down direction around the top-down swing support axis 6. By swinging the main body of the cutting device 10 in the top-down direction, a cutting depth of the workpiece W, a depth at which the rotating cutting blade 11 cuts , can be adjusted.

[00049] As shown in FIGS. 2 and 5, a depth guide 7 for adjusting the depth of cut may be provided on a rear part of the base 2. The depth guide 7 may extend in a circular arc shape, along a circumferential direction around the up-down support shaft 6. A swing up and down clamping lever 8 can be provided on the depth guide 7. The swing up and down clamping lever 8 can be rotated about an axis lever 8a which extends in the left-right direction. By operating the swing clamping lever up and down 8, a height of the main cutting body 10 can be fixed by the depth guide 7. In more detail, by turning the swing clamping lever up and down 8 in a loosening direction, the cutting main body 10 can be rotated in the top-down direction. On the other hand, by turning the up and down swing clamping lever 8 in a clamping direction, the cutting main body 10 can be clamped at a desired up and down swing angle, i.e. at a depth of desired cut.

[00050] As shown in FIG. 2, the main body of the cutting device 10 may include a clamping cover 12. The clamping cover 12 may cover an upper half of the rotating cutting blade 11. A lower half of the rotating cutting blade 11 may project from a surface bottom of the base 2. By turning the rotary cutting blade 11 and moving the cutting device 1 forward, the protruding portion of the rotating cutting blade 11 can cut the workpiece W.

[00051] As shown in FIGS. 5 and 7, the main body of the cutter 10 may include an engine housing 20, which may be generally tubular in shape, and a gear housing 22 adjacent the engine housing 20. The engine housing 20 may house an electric motor. 21, as a brushless DC motor. A motor shaft 21a of the electric motor 21 can extend in the left-right direction. Motor housing 20 may include a plurality of inlet holes 20a at one end of motor housing 20, the end of which is in an extension direction of motor shaft 21a. Ribs 20b may be provided around the plurality of inlet holes 20a so as to protrude slightly from a right end surface of the engine compartment 20 in the direction of extension of the engine shaft 21a. When the cutter 1 is placed with one side of the engine compartment 20b facing downwards, the ribs 20b can produce a space between the entry holes 20a and a mounting surface on which the cutter 1 is placed. Due to space, the right surface of the engine compartment 20 can be sucked into the mounting surface by a flow of air flowing towards the plurality of inlet plenums 20a from the outside. Due to this configuration, a large amount of cutting powder can be prevented from entering the engine compartment 20. Thus, cutting powder can be prevented from entering the engine compartment 20 through the inlet holes 20a.

[00052] As shown in FIGS. 4 and 5, the main body of the cutting device 10 may include a controller 24 which is located behind the electric motor 21. The controller 24, which houses a control circuit board in a shallow rectangular box, may be embedded in resin. Controller 24 may be located so that a thickness direction (a shorter side direction) of controller 24 is in the top-down direction. A control circuit, a drive circuit, an automatic stop circuit, etc. may be included in controller 24. The control circuit may include a microprocessor which primarily controls the electric motor 21. The drive circuit may include field effect transistors (FETs) which switch current to the electric motor 21, for example, based on control signals transmitted from the control circuit. The auto-stop circuit can shut off the power supply to the electric motor 21, for example, based on a detection result with respect to a rechargeable battery 41, which will be discussed later, so as not to be in a state of disrepair. over-discharge or an over-charged state.

[00053] As shown in FIGS. 5 and 7, a plurality of exhaust ports 22b may be provided on a front side of gear housing 22. The plurality of exhaust ports 22b may communicate with the plurality of inlet ports 22a through an interior of the gear housing. motor 20 and a gear housing interior 22. A cooling fan (not shown) can be attached to an electric motor shaft 21. By rotating the motor shaft, the cooling fan can rotate, which in turn causes a stream of air flowing from the plurality of inlet ports 20a to the plurality of exhaust ports 22b. The air flow can cool the electric motor 21, etc.

[00054] As shown in FIG. 7, the gearbox 22 may house a reduction gear mechanism 22a and a spindle (output shaft) 16 which is rotated by the reduction gear mechanism 22a. The spindle 16 can extend in the left-right direction and be rotatably supported by the gear housing 22. A rotational output of the motor shaft of the electric motor 21 can be reduced by means of the reduction gear mechanism 22a and transmitted to the spindle 16. A left end side of the spindle 16 can protrude into the clamping cover 12. The rotating cutting blade 11 can be fixed to the protruding portion of the spindle 16.

[00055] As shown in FIG. 6, the rotating cutting blade 11 can be held by an outer flange 14 and an inner flange 15 in a direction perpendicular to the surfaces of the outer and inner flanges 14, 15 (in the left-right direction), so that the cutting blade rotary cutter 11 is perpendicular to spindle 16. The held state of rotary cutter blade 11 can be locked by tightening a clamping screw 13 disposed at a left end of spindle 16. Due to this configuration, rotating cutter blade 11 can be clamped to the spindle 16 so as to be non-displaceable in an axial direction of spindle 16 and in a radial direction of spindle 16.

[00056] As shown in FIG. 7, a shaft lock 23 can be provided on a front of the gear housing 22. By inserting the shaft lock 23 into the gearbox 22, the spindle 16 may enter a non-disabled state. rotary. During this state, by turning the clamping screw 13 using, for example, a hexagonal shank wrench 42, the rotating cutting blade 11 can be removed from the spindle 16 and exchanged for another rotating cutting blade.

[00057] As shown in FIGS. 1 and 5, a handle compartment 30 may be provided above the engine compartment 20 and the gear housing 22. The handle housing 30 may include a handle 30a for a user to grip. The handle 30a may have a loop shape and may extend from an upper front part of the main body of the cutting device 10 in an upward direction and may extend downwards in a rearward direction therefrom to be connected to a rear of the main body of the cutting device 10. An anti-slip elastomer resin may be attached to a surface of the handle 30a. Furthermore, as shown in FIG. 4, a key holding portion 43 for securing the hex shank key 42 may be provided at the rear of the handle 30a.

[00058] As shown in FIG. 4, a switch lever 31 may be provided on an inner circumferential side of the handle 30a. Switch lever 31 may be formed so that the user can pull switch lever 31 while holding handle 30a. When the switch lever 31 is pulled, the electric motor 21 can be activated to rotate the rotary cutter blade 11. A locking knob 32 can be provided on an upper side side of the handle 30a. In a normal state, switch handle 31 can be locked and cannot be pulled. By pushing the lock button 32 horizontally, in the right direction or in the left direction, the switch lever 31 can be released from the locked state, so that the switch lever 31 can be pulled out. When released, switch handle 31 can automatically return to a locked state. As shown in FIG. 7, the left and right locking buttons 32 may have a tubular shape projecting from the handle 30a in the left and right direction, respectively. In addition, the upper left and right portions of the locking buttons 32 can be cut at a downward angle in the left and right direction, respectively. Thus, each of the upper left and right portions of the locking buttons 32 may have an inclined flat shape. Because of this configuration, the user can easily contact the slanted flat part of the locking buttons 32 with his fingertip. The left and right locking buttons 32 can be integrated with each other and moved horizontally in the left-right direction. The user can easily move the integrated lock buttons 32 in the left-right direction by simply pressing the sloping flat part of the lock buttons 32, without the need to press the lock buttons 32 in the axial direction of the lock buttons 32.

[00059] As shown in FIG. 7, a light 33 can be provided in a front portion of the handle compartment 30. The light 33 can be, for example, composed of a light emitting diode (LED). Light 33 can be lit when switch lever 31 is pulled to turn it on. The light 33 can illuminate a cutting position of the rotating cutting blade 11. The light 33 can be arranged on the right side with respect to the left-right tilting support axis 5 when a so-called vertical cut is performed, i.e. when the cutting blade rotary cutter 11 is situated perpendicular to the lower surface of base 2. The rotary cutter blade 11 can be arranged on the left side with respect to the left-right tilt support axis 5 when a vertical cut is performed. Because of this configuration, when a vertical cut is performed, the light 33 can illuminate the cutting position of the rotating cutting blade 11, the cutting position being located on a lower left side of the light 33. When the main body of the cutting device cut 10 is angled to the left, i.e. when an oblique cut to the left is performed, as shown in FIG. 8, the light 33 can illuminate the cutting position of the rotating cutting blade 11, the cutting position being located on a lower side of the light 33.

[00060] As shown in FIG. 4, a recess-shaped adapter attachment portion 34 may be provided on a right side of the handle compartment 30. A communication adapter 35 may be inserted and secured to the adapter attachment portion 34. Communication adapter 35 may be communicate by radio with an auxiliary device. The activation and deactivation of the auxiliary device can be linked to those of the cutting device 1, for example by radio communication. For example, a dust collector, which is located separate from cutting device 1, can be connected to cutting device 1 using communication adapter 35.

[00061] As shown in FIGS. 2 and 9, a battery attachment portion 40 may be provided on a rear portion of the cutter main body 10. A battery attachment portion 40 attachment surface may face rearwardly. A rechargeable battery 41 may be slidably attached to the battery attachment portion 40, for example, by sliding the rechargeable battery 41 along the attachment surface of the battery attachment portion 40. The rechargeable battery 41 may be approximately rectangular box. The rechargeable battery 41 may comprise, for example, a lithium-ion battery whose output voltage is 18V. The rechargeable battery 41 can be removed from the battery attachment portion 40 and recharged using a dedicated charger. The rechargeable battery 41 can also be used in other rechargeable electrical devices, such as an electric screwdriver, electric drill, etc.

[00062] As shown in FIG. 10, attachment cover 12 may be detachably secured to a left side of gearcase 22. Gearbox 22 may include a flat plate-shaped cover attachment portion 22c that extends in the front-rear direction. . A screw fixing portion 12a may be provided on a left side of the fixing cover 12. As shown in FIGS. 11 and 12, a plurality of curved hook portions 12b may be provided on a right side of the attachment cover 12. The attachment cover 12 may be attached to the gear case 22 by hooking the hook portions 12b to the locking portion 12. cover fixing 22c and screwing the fixing cover 12 to the gearbox 22 on the cover fixing portion 22c and the screw fixing portion 12a

[00063] As shown in FIGS. 2 and 10, an attachment/detachment portion 50, which will be discussed later and may be detachably attached to a spout 60 or a tank 70, may be provided on a front portion of attachment cover 12. A support portion 50a , which generally may have a tubular shape, may be provided on an upper side of the attachment/detachment portion 50. The support portion 50a may be angled rearwardly as it extends upwards and an upper portion of the support portion 50a may be open. As shown in FIG. 7, the support portion 50a may have a half-split structure, in which the support portion 50a is divided into a split right half portion 50d and a split left half portion 50e. The right half split portion 50d may be secured to the left half split portion 50e using a plurality of fixing screws 50f. Thus, the right half split portion 50d can be separated from the left half split portion 50e by removing the plurality of fixing screws 50f. By separating the right half-split portion 50d from the left half-split portion 50e, an interior of the attachment/detachment portion 50 can be exposed to the outside. As shown in FIG. 15 , a fluid supply port 50b and a contact portion 50b surrounding the fluid supply port 50b may be provided on a lower inner circumference of the attachment/detachment portion 50. The fluid supply port 50b may have a tubular in shape and may extend in a downward direction. A cutting fluid, such as water, can flow through the fluid supply port 50b.

[00064] As shown in FIG. 13, an on/off cock 53 may be provided below the fluid supply port 50b. The open/close cock 53 can be integrally connected to an open/close lever 52 which is exposed to the outside of the fixing cap 12. The open/close cock 53 and the open/close lever 52 can be rotatably supported around an axis that extends in the left-right direction. An insertion hole 53a may pass through a central portion of the open/close cock 53. A drain tube 51 may be provided below the open/close cock 53. The drain tube 51 may be arranged to extend mainly in a downward direction. An ejection port 54 can be opened towards an end portion of the drain tube 51. The fluid supply port 50b, the insertion hole 53a of the open/close cock 53 and the drain tube 51 can form a fluid flow path 58 through which cutting fluid can flow from the upper portion of the clamping/detaching portion 50 to the ejection port 54. As shown in FIG. 6, the ejection port 54 can be opened towards a lower front of the rotating cutting blade 11, which generally corresponds to a cutting start location of the cutting position.

[00065] FIG. 13 shows that the open/close lever 52 is in a closed position, where the insertion hole 53a extends in a direction that intersects with a direction in which the fluid supply port 50b and the drain tube 51 extend. In this case, the fluid flow path 58 between the fluid supply port 50b and the drain tube 51 can be closed, due to the on/off cock 53. In contrast, FIG. 14 shows that the open/close lever 52 is in an open position, where the insertion hole 52a extends in the same direction that the fluid supply port 50b and drain tube 51 generally extend. In this case, the insertion hole 52a can communicate with the fluid supply port 50b and the drain tube 51. Thus, fluid, such as water, can flow from the fluid supply port 50b to the ejection port 54, through the insertion hole 53a and the drain tube 51.

[00066] As shown in FIG. 13, a latching jaw 56 may be provided on an inner circumferential side of the attachment/detachment portion 50. A removal button 55 may be provided on an outer circumferential side of the attachment/detachment portion 50. The latching jaw 56 may be be integrally connected to the release button 55. The latching jaw 56 may have a protrusion shape extending towards an interior of the attachment/detachment portion 50, for example, in a radial direction of the attachment/detachment portion 50. The engagement jaw protrusion 56, which may be rectangular when viewed in cross-section, may engage an outer circumferential recess 61a provided on an outer circumferential side of a nozzle-side attachment/detachment portion 61, which generally may have a tubular and will be discussed later. The latching jaw 56 is displaceably supported by the clamping/detaching portion 50 in a radial direction thereof. A compression spring (bias member) 57 may be provided between the catch jaw 56 and an inner circumferential wall of the attachment/detachment portion 50. The catch jaw 56 may be deflected by the compression spring 57 towards an interior of the attachment/detachment portion 50 in a radial direction thereof. As shown in FIG. 15, by pushing the release button 55, the latching jaw 56 can be moved out in the radial direction of the clamping/detaching portion 50, which is against the deflection force of the compression spring 57.

[00067] As shown in FIG. 1, a nozzle 60, which may be attached to a municipal water hose 63, may be attached to the attachment/detachment portion 50. As shown in FIGS. 2 and 5, the spout 60, after being attached to the attachment/detachment part 50, can be tilted back as it extends upwards. As shown in FIG. 3, a tank 70 storing a cutting liquid, such as water, can be attached to the clamping/detaching portion 50. A longitudinal direction of the tank 70, after it has been attached to the clamping/detaching portion 50, can be tilted back. as it extends upwards. As shown in FIG. 10, nozzle 60 or tank 70 may be attached to attachment/detachment portion 50 in a selectable manner.

[00068] As shown in FIG. 1, nozzle 60 may include a nozzle-side attachment/detachment portion 61, which may generally be tubular in shape and may be removably attached to attachment/detachment portion 50. Nozzle 60 may also include a nozzle attachment portion 50. hose 62 which can be connected to one end of the municipal water hose 63. The other end of the municipal water hose 63 can be connected to, for example, a faucet 64 which can supply water supplied by the city. Nozzle 60 may form a pipeline in an interior of nozzle 60 extending from one end of the hose clamping portion 62 to an end of the nozzle side clamping/detaching portion 61 and through which a cutting fluid, how water can flow. As shown in FIG. 10, a tank side attachment/detachment portion 71 may be attached to the tank 70, the tank 70 being capable of storing a cutting liquid, such as water. The spout side attachment/detachment portion 61 may generally have the same configuration and the same shape as the tank side attachment/detachment portion 71. Thus, in the following explanation, only the configuration of the attachment/detachment part 61 on the nozzle side will be explained in detail.

[00069] As shown in FIG. 10, the outer circumferential recess 61a (or an outer circumferential recess 71a of the tank 70), which may have a recessed groove shape, may be formed on an outer circumferential periphery of the spout-side tubular attachment/detachment portion 61 (or the attachment/detachment part 71 on the side of the tank). The outer circumferential recess 61a may extend along the entire periphery of the nozzle side attachment/detachment portion 61. The outer circumferential recess 61a may be spaced from a lower end of the nozzle side attachment/detachment portion 61 by a predetermined length. In more detail, as shown in FIG. 13, the outer circumferential recess 61a may be located parallel to the engaging jaw 56, in a side-by-side fashion, when the lower end of the nozzle side clamp/detach portion 61 contacts the contact portion 50c of the clamp. / detachable portion 50. The outer circumferential recess 61a may be formed to be generally rectangular when viewed in cross section. This allows the outer circumferential recess 61a to be engaged with the protrusion of the engaging jaw 56. A guide surface 61c may be formed at a lower end of the outer circumferential recess 61a. The guide surface 61a may be formed on one side of the outer circumferential recess 61a closest to the lower end of the nozzle-side attachment/detachment portion 61 (on a lower side in FIG. 13). As shown in FIG. 13, the guide surface 61c can be angled outwardly in a radial direction so that it extends upward from the lower end side of the nozzle-side attachment/detachment portion 61 toward one side of one end. top of it (one side of its base portion). Therefore, the guide surface 61c may generally have a conical surface shape.

[00070] As shown in FIG. 13, a valve 65 and a compression spring 65b may be provided within the spout-side attachment/detachment portion 61. The valve 65 may generally have a column shape extending in a longitudinal direction from the attachment/detachment portion. spout side 61. Valve 65 may include an O-ring 65a on one side of the base portion of spout-side attachment/detachment portion 61 (on an upper side in FIG. 13). Valve 65 may include a recess portion 65c closer to the end portion side of the nozzle side clamping/detaching portion 61 (on a lower side in FIG. 13) than the O-ring 65a. The recess portion 65c may be structured to be recessed inwardly in a radial direction. Compression spring 65b may be disposed on an outer circumferential periphery of valve 65 at a position below recess portion 65c. Valve 65 can be tilted downwards due to compression spring 65b. A small diameter portion may be provided on an inner circumferential periphery of the spout side clamping/detaching portion 61. A valve seat 61b may be provided on an upper side of the small diameter portion so that it can be placed in contact with the O-ring 65a in a sealing manner (eg, in an airtight manner).

[00071] As shown in FIG. 15, when the nozzle side clamping/detaching portion 61 is not attached to the clamping/detaching portion 50, the O-ring 65a of the valve 65 can be brought into contact with the valve seat 61b so as to close a opening of the attachment/detachment portion 61 on the nozzle side. Because of this, the city water supplied by the city water hose 63, which is shown in FIG. 1, attached to the hose attachment portion 62 of the nozzle-side attachment/detachment portion 61 can be closed. FIG. 13 shows that the nozzle side clamping/detaching portion 61 is pushed towards the clamping/detaching portion 50. The guide surface 61c can push the latching jaw 56 out in the radial direction of the clamping/detaching portion 50, against the deflection force of the compression spring 57 as the guide surface 61 moves along a lateral side of the latching jaw 56. The guide surface 61c can be inclined to extend outwardly in the radial direction. The guide surface 61c is angled so that one side of the base portion in a front in the direction of movement is radially inward and one side of the end portion in a back portion in the direction of movement is radially outward. Due to this configuration, the latching jaw 56 can move outward in the radial direction of the clamping/detaching portion 50 along the guide surface 61c when the nose 60 is moved in the clamping direction.

[00072] When the nozzle side clamping/detaching portion 61 moves further towards the clamping/detaching portion 50, the outer circumferential recess 61a may move towards the lateral side of the latching jaw 56. Finally, the engaging jaw 56 may enter the outer circumferential recess 61a, due to a deflection force of the compression spring 57, in the radial direction into the attachment/detachment portion 50. At this point, the engaging jaw 56 may engage the recess outer circumferential 61a, due to a ridge/recess configuration. The engaging relationship of the engaging jaw 56 with the outer circumferential recess 61a may restrict the nozzle side clamping/detaching portion 61 from being displaced in an upward-down direction relative to the clamping/detaching portion 50.

[00073] When the latching jaw 56 engages the outer circumferential recess 61a, a lower end portion of the valve 65 may contact the contact portion 50c of the clamp/detach portion 50. The contact portion 50c may push the valve 65 off. so as to move it upwards against the deflection force of the compression spring 65b. Because of this, O-ring 65a can be moved away from valve seat 61b. Due to this movement, the recess portion 65c, which has a smaller diameter than the valve seat 61b, can be arranged in parallel with the valve seat 61b, in a side-by-side fashion. At this point, a cutting fluid, such as water, can be directed to the lower end of the nozzle-side attachment/detachment portion 61, through the recess portion 65c.

[00074] FIG. 14 shows that the open/close lever 52 has been rotated to an open position, while the nozzle side clamp/detach portion 61 is attached to the clamp/detach portion 50. At this point, a flow path 58, comprising fluid supply port 50b, insertion hole 53a and drain tube 51 can communicate with recess portion 65c. Due to this configuration, a cutting fluid, such as water supplied by municipal water hose 63, after passing through nozzle 60 and through attachment/detachment portion 50, can be ejected from ejection port 54 towards the position of cut on one side surface of the lower front of the rotary cutter blade 11 (see FIG. 6).

[00075] Removal button 55, an embodiment of which is shown in FIG. 15, may disengage an engagement of the nose-side attachment/detachment portion 61 of the attachment/detachment portion 50. When the release button 55 is pressed against a biasing force of the compression spring 57, the engagement jaw 56 may be displaced outwardly in the radial direction of the clamping/detaching portion 50. Then, the engaging jaw 56 can be disengaged from the outer circumferential recess 61a. At this point, valve 65 can be pushed down due to the biasing force of compression spring 65b. Because of this, the lower end of the valve 65 may push against the contact portion 50c. Consequently, the attachment/detachment part 61 on the nozzle side can be pushed upwards due to its counterforce. In this way, the spout side attachment/detachment portion 61 can be removed from the spout-side attachment/detachment portion 50. As the valve 65 has now been moved downwardly with respect to the spout side attachment/detachment portion 61, the O -ring 65a may contact the valve seat 61b so as to close the opening of the nozzle side clamping/detaching portion 61.

[00076] As shown in FIG. 16, an attachment cap 80 may be attached to the cutting device 1, instead of the attachment cap 12 shown in FIG. 2 Attachment cap 80 may include a screw attachment portion 80a that can be attached to cap attachment portion 22c (see FIG. 10). A dust collection hole 81, through which an interior of the attachment cover 80 communicates with its exterior, may be provided in a front portion of the attachment cover 80. For example, a dust collection hose, which may be connected to a separately prepared dust collector, it can be connected to the dust collection port 81. By selectively attaching one of the clamping caps 12, 80, the cutting device 1 can be used as a wet-type cutting device or as a dry type cutting device.

[00077] As shown in FIG. 17, a plastic beverage bottle 90 for storing a cutting liquid, such as water, may be attached to the attachment/detachment portion 50, instead of the spout 60 or the tank 70. The plastic beverage bottle 90, which is referred to as a PET bottle, it can be a plastic beverage container made from polyethylene terephthalate (commonly abbreviated to PET). The plastic beverage bottle 90 can be provided for a plastic beverage container used in many homes. Thus, after the beverage has been consumed, the beverage bottle can be used as a container to store a cutting liquid such as water. Plastic beverage bottle 90 may be attached to attachment/detachment portion 50 in such a way that an opening 90a of plastic beverage bottle 90 is directed downwards and a bottom 90d of plastic beverage bottle 90 is directed downwards. up. As shown in FIG. 17, once the plastic beverage bottle 90 is attached to the attachment/detachment portion 50, it can be tilted back as it extends upwards.

[00078] As shown in FIG. 18, male threads 90b may be formed on an outer circumferential periphery of opening 90a. A hole 90c may be formed in the bottom 90d of the plastic beverage bottle 90 so as to penetrate the inside and outside of the plastic beverage bottle 90. The hole 90c may be drilled using, for example, an electric drill. As the liquid level inside the plastic beverage bottle 90 is lowered, outside air can flow into the plastic beverage bottle 90 through orifice 90c. External air flowing into the plastic beverage bottle 90 can prevent negative pressure from being produced inside the plastic beverage bottle 90. The hole 90c may be formed in the bottom 90d or on a side side around the bottom 90d.

[00079] As shown in FIG. 18, an orifice 70c may be formed in a bottom 70d of tank 70 to penetrate through an interior and an exterior of tank 70 in a similar manner to the plastic beverage bottle 90. External air may flow into the tank 70 through hole 70c. The hole 70c may be formed in the bottom 70d or in a side side around the bottom 70d. Male threads 70b may be formed on an outer circumferential periphery of an opening 70a of tank 70. Female threads 71b, into which the male thread 70b may be screwed, may be formed on an inner circumferential periphery of the attachment/detachment portion 71. The tank 70 can be connected to the tank side attachment/detachment portion 71 by screwing male threads 70b into female threads 71b.

[00080] As shown in FIG. 17, the plastic beverage bottle 90 can be attached to the attachment/detachment portion 50 by means of an attachment 91. As shown in FIG. 18, accessory 91 may include a cap 92 for attachment/detachment portion 50 (lower side in FIG. 18) and an adapter 93 for plastic beverage bottle 90 (upper side in FIG. 18). Cap 92 can be detached from adapter 93. Both cap 92 and adapter 93 can be formed into approximately a tubular shape and fluid can flow through both. Cap 92 may have the same tip configuration and the same internal configuration as those of the nozzle side clamp/detach portion 61 (see FIG. 10) or the tank side clamp/detach portion 71. As shown in FIG. 19, an outer circumferential recess 92a, which may have a recessed groove shape, may be formed on an outer circumferential periphery of the tubular cap 92. The cap 92 may include a guide surface 92c on an outer circumferential periphery of the cap 92 closer on one end of it. Guide surface 92c may be angled and formed into a conical surface shape. Female threads 92b may be formed on an inner circumferential periphery of one side of the base portion (upper side in FIG. 19) of cap 92.

[00081] As shown in FIG. 18, adapter 93 may include a cap attachment portion 93c, which may be tubular in shape, at a lower portion thereof. The cap attachment portion 93c faces the cap 92. In addition, the adapter 93 may also include a bottle attachment portion 93d, which may have a tubular shape, in an upper portion thereof. The bottle attachment portion 93d faces the plastic beverage bottle 90. The bottle attachment portion 93d may have a larger diameter than the cap attachment portion 93c. Male threads 93a, which may be screwed onto female threads 92b of cap 92, may be formed on an outer circumferential periphery of the securing portion of cap 93c. Female threads 93b, which may be screwed onto male threads 90b of plastic beverage bottle 90, may be formed on an inner circumferential periphery of bottle attachment portion 93d. By screwing the male threads 93a of the adapter 93 into the female threads 92b of the cap 92 and by screwing the male threads 90b of the plastic bottle 90 into the female threads 93b of the adapter 93, the cap 92 can be attached to the plastic beverage bottle 90 via the adapter 93. A direction of attaching male threads 93a of adapter 93 to female threads 92b of cap 92 may be the same as that of male threads 90b of plastic beverage bottle 90 to female threads 93b of adapter 93.

[00082] As shown in FIG. 19, the cap 92 can be attached to the opening 90a of the plastic beverage bottle 90 by means of the adapter 93. When the cap 92 moves towards the attachment/detachment portion 50, the guide surface 92c of the cap 92 can push the cap 92. latching jaw 56 outwards, in the radial direction of the clamping/detaching portion 50, against the deflection force of the compression spring 57. As the cap 92 moves further towards the clamping/detaching portion 50, the detent jaw The latch 56, due to being inclined inwardly in the radial direction of the attachment/detachment portion 50 by the compression spring 57, may enter the outer circumferential recess 92a of the cover 92. Because of this, the latch jaw 56 may engage with the recess. outer circumferential 92a of cap 92, due to the ridge/recess configuration. In this way, the cover 92 can be held on the attachment/detachment portion 50 in a tool-less manner (without using a specific tool). When removing the cover 92 from the clamping/detaching portion 50, pressing the removal button 55 can be pressed against the biasing force of the compression spring 57 so as to move the latching jaw 56 out in the radial direction of the clamping. /detachment portion 50. Cap 92 may then pop out of attachment/detachment portion 50, due to the biasing force of compression spring 65b polarizing valve 65, in the direction towards the end side of cap 92 (in the direction lower than cover 92).

[00083] According to the cutting device 1 of the disclosed embodiment discussed above, the cutting device 1 may include a rotating cutting blade 11, a cutting device main body 10 rotatably supporting the rotating cutting blade 11 and a cover attachment 12 which is attached to the main body of the cutting device 10 and covers the rotating cutting blade 11. Attachment cover 12 may include an ejection port 54, an attachment/detachment portion 50 and a support portion 50a. The ejection port 54 can eject cutting fluid towards the cutting position of the rotating cutter blade 11. The clamping/detaching portion 50 can communicate with the ejection port 54 and can supply a cutting fluid to the cutting port. ejection 54. Support portion 50a may be provided on attachment/detachment portion 50. A nozzle 60, connectable to a municipal water hose 63, may be detachably attached to attachment/detachment portion 50 in a tool-less manner. (without using a specific tool).

[00084] Because of the above configuration, the municipal water hose 63, through which a cutting liquid such as water can be supplied for a long time and in large quantity, can be easily attached to the fixing cap 12. In addition In addition, the city water hose 63 can be easily removed from the fixing cap 12 without tools. Because of this configuration, the operability for connecting and detaching the municipal water hose 63 to and from the cutting device 1 can be improved.

[00085] Furthermore, according to the embodiments of the above-disclosed cutting device 1, the attachment/detachment portion 50 can be selectively attached to a nozzle 60 or a liquid storage tank 70. Thus, either the nozzle 60 connected to the municipal water hose 63 or the tank 70 can be selected depending on the intended use. In more detail, when a cutting liquid such as water is to be supplied for a long time or in large quantity to the cutting device 1, the nozzle 60 can be fixed to the clamping/detaching portion 50. On the other hand, when the amount of water required is small or the cut must be performed in a location that is not close enough to the city water supply faucet 64, the tank 70 can be selectively attached to the attachment/detachment portion 50 instead nozzle 60. Because of this configuration, usability can be improved.

[00086] Furthermore, according to the embodiments of the cutting device 1 discussed above, the nozzle 60 may include the nozzle-side attachment/detachment part 61 detachably attached to the attachment/detachment part 50. In addition, the tank 70 may include the tank side attachment/detachment portion 71 detachably attached to the attachment/detachment portion 50. The spout side attachment/detachment portion 61 may have substantially the same configuration as the attachment portion /detachment from the side of the tank 71. Due to this configuration, the nozzle 60 can be connected to the municipal water hose 63 or to the tank 70. That is, they can be attached and detached from the attachment/detachment portion 50 in a selectable manner. , depending on the intended use. In particular, they can be fixed/detached without using a specific fixing tool and without a complicated operation to fix and/or detach them.

[00087] Furthermore, according to the embodiments of the cutting device 1 discussed above, the main body of the cutting device 10 can be held by a user who is situated behind the cutting device 1. The clamping/detaching portion 50 can be provided on the front of the clamping cover 12. Consequently, the clamping/detaching portion 50 can be located away from the user and close to a position where the rotating cutting blade 11 begins to cut the workpiece (start position cutting). Because of this configuration, cutting liquid, such as water, can be easily ejected into the cutting start position. Generally, cutting powder can be produced at the cutting start position. Thus, by ejecting a cutting liquid, such as water, towards the cutting start position, cutting dust can be effectively removed from the rotating cutting blade 11. In addition, generally, cutting resistance and heat generation can occur. be larger at the cutting start position. Thus, by ejecting cutting liquid, such as water, towards the cutting start position, the rotating cutting blade 11 can be effectively cooled.

[00088] Furthermore, in accordance with the embodiments of the cutting device 1 disclosed above, the clamping/detaching portion 50 may include a support portion 50a which is angled backwards as it extends upwards. Thus, if the spout 60 or the tank 70 is attached to the attachment/detachment portion 50, it can be tilted so that an upper portion faces the user. Therefore, good operability can be obtained when the user attaches or detaches the nozzle 60 or the tank 70 to or from the attachment/detachment portion 50. In addition, the municipal water hose 63 connected to the nozzle 60 may extend in a backward direction so that it does not interfere with the progress of cutting work.

[00089] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the support portion 50a may have a half-split structure, in which a right-hand half-split housing 50d is separated from a left-hand half-split housing 50e in a left-right direction. The left-right direction intersects with a direction in which the nozzle is detachably attached to the attachment/detachment portion 50. The attachment/detachment portion 50 may be exposed to the outside, for example, by dividing the support portion 50a in the left and right half boxes 50e, 50d. For example, when cutting powder enters the attachment/detachment portion 50, the support portion 50a may be divided into the left and right half-split housings 50e, 50d to expose the support portion 50a to the outside. Therefore, the attachment/detachment portion 50 can be easily cleaned, thus preventing clogging by cutting the dust inside it.

[00090] Furthermore, in accordance with the embodiments of the cutting device 1 discussed above, the clamping/detaching portion 50 may include an engaging jaw 50 and a compression spring 57. The engaging jaw 50 may project inwardly. in the radial direction of the clamping/detachment portion 50 and may be movable in the radial direction of the clamping/detachment portion 50. The compression spring 57 can deflect the latching jaw 56 in the radial direction into the clamping/detachment portion 50. Corresponding to this, an outer circumferential recess 61a and a guide surface 61c may be provided on the outer circumferential periphery of the nozzle side attachment/detachment portion 61 of the nozzle 60. The outer circumferential recess 61a may engage the latching jaw 56, due to the overhang/recess configuration. The guide surface 61c may be disposed closer to the nose end portion 60 than the outer circumferential recess 61a. Guide surface 61c can be angled outwardly in the radial direction as it extends toward the end portion of the nozzle 60 toward the base portion thereof (as it extends upward).

[00091] Because of the above configuration, when the nozzle side clamping/detaching portion 61 of the nozzle 60 is pushed towards the clamping/detaching portion 50, the guide surface 61c may push the latching jaw 56 out. in the radial direction of the clamping/detaching portion 50, against the biasing force of the compression spring 57. Consequently, the clamping/detaching portion of the nozzle side 61 can be moved further to the clamping/detaching portion 50 side. When the guide surface 61c is moved further to be displaced below the latching jaw 56, the latching jaw 56 may move inwardly in the radial direction of the clamping/detaching portion 50, due to the deflection force of the detent spring. compression 57. Then, the engaging jaw 56 can engage the outer circumferential recess 61a, due to the protrusion/recess configuration. In this way, only one pushing operation from the nozzle 60 to the attachment/detachment part 50 can be used to secure the nozzle 60 to the attachment/detachment part 50

[00092] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the clamping/detaching portion 50 may include a flow path 58, an open/close cock 53 and an open/close lever 52. The flow path 58 can be configured so that water can be supplied from the clamping/detaching portion 50 to the ejection port 54 through the flow path 58. The on/off tap 54 can open/close the flow path 58. The open/close lever 52 can be connected to the open/close cock 53 and can protrude from the clamp/detach portion 50. The open/close cock 53 and the open/close lever 52 can be rotated about an axis extending in the left-right direction intercepting the flow path 58. The flow path 58 can be opened/closed by rotating the open/close cock 53. Due to this configuration, only one operation of route The opening/closing lever 52 can alternate an opening/closing of the flow path 58. Furthermore, the open/close lever 52 can protrude from the clamping/detaching portion 50. Therefore, the flow path 58 can be opened/closed outside the clamping/detaching portion 50. Thus, good operability for opening/closing the flow path 58 can be obtained.

[00093] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the main body of the cutting device 10 can include a light 33 that can illuminate the cutting position. By using the light 33, it can be visually and easily confirmed that the cutting position of the workpiece cut by the rotating cutting blade 11 is suitable. In addition, it can be visually and easily confirmed that the cutting fluid is being ejected into the cutting position of the workpiece properly. So when the cutting liquid is ejected to the cutting position, the efficiency to do the cutting work can be improved.

[00094] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the cutting device 1 may include a base 2 and a left-to-right tilting support axis 5 supporting the main body of the cutting device 10 from a left-to-right direction with respect to the base 2. The light 33 can be arranged on an opposite side of the rotating cutting blade 11 with respect to the left-to-right tilting support axis 5. For example , the main body of the cutting device 10 can be tilted towards the side of the rotating cutting blade 11 around the left-to-right tilting support axis 5. In this case, that is, when the main body of the cutting device cutting 10 is inclined towards the side of the rotating cutting blade 11 (e.g. in the left direction), because the light 33 is arranged on the rotating cutting blade 11, the light 33 can illuminate the cutting position of the cutting blade top 11 rotary The. Thus, good visibility of the cutting position can be obtained even when the cutting device 1 is tilted.

[00095] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the cutting device 1 may include the rotating cutting blade 11, the main body of the cutting device 10 rotatably supporting the rotating cutting blade 11 and the clamping cap 12 which is attached to the main body of the cutting device 10 and which covers the rotating cutting blade 11. The clamping cover 12 may include the ejection port 54, the clamping/detaching portion 50 and the clamping portion 50. support 50a. The ejection port 54 can eject the cutting fluid towards the cutting position of the rotating cutter blade 11. The clamping/detaching portion 50 can communicate with the ejection port 54 and can supply the cutting fluid to the cutting port. ejection 54. Support portion 50a may be provided on clamping/detaching portion 50. Plastic beverage bottle 90 may be detachably attached to clamping/detaching portion 50. Accordingly, plastic beverage bottle 90, which is easily available at a cheap price and is used as a beverage container in many homes, it can be used as a supply source for the cutting liquid to be ejected. Thus, in situations where a specialized bottle for the cutter is not available, the plastic beverage bottle 90 can be attached to the cutter 1 when used as a wet-type cutter. Furthermore, by using the plastic beverage bottle 90, a suitable plastic beverage bottle with a required liquid capacity can be selected from a variety of different plastic beverage bottles, depending on the intended use. Thus, the plastic beverage bottle 90, which is inexpensive and convenient, can be attached to the clamping/detaching portion 50 when the cutting device 1 is used.

[00096] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the cutting device 1 may include an accessory 91, through which the plastic beverage bottle 90 can be attached to the attachment/detachment portion 50 The male threads 90b of the plastic beverage bottle 90 may be formed on the outer circumferential periphery around the opening 90a of the plastic beverage bottle 90. Corresponding to this configuration, a female thread 93b, which can be engaged with the male thread 90b of the plastic beverage bottle 90, can be formed into the fitting 91. Due to this configuration, the plastic beverage bottle 90 can be easily, removably attached to the attachment/detachment portion 50 via the attachment 91. plastic beverage bottle 90 can be easily attached to fitting 91, for example, by engaging the male thread 90b of the plastic beverage bottle 90 with the female threads 93b of the adapter 93. Furthermore, the beverage bottle plastic 90 can be easily separated from fitting 91 by disengaging male threads 90b from female threads 93b.

[00097] Furthermore, in accordance with the embodiments of the cutting device 1 disclosed above, the attachment 91 may include a cover 92 and an adapter 93. The cover 92 may be engageable with the attachment/detachment portion 50. The cover 92 can be connected to plastic beverage bottle 90 via adapter 93. Due to this configuration, plastic beverage bottle 90, which can have a variety of shapes and sizes, can be attached to cap 92 via adapter 93 In addition, the cap 92 may have substantially the same configuration as, for example, the nozzle-side attachment/detachment portion 61, which may be attached to the end of the municipal water hose 63, or the same configuration as the attachment of the nozzle. side of the tank/detachable portion 71 attached to the tank 70. Accordingly, a selectable source of cutting liquid for ejection can be enlarged and thus good usability of the cutting device 1 can be obtained.

[00098] Furthermore, in accordance with the embodiments of the cutting device 1 disclosed above, the adapter 93 may include a bottle attachment portion 93b, to which the plastic beverage plastic bottle 90 may be attached. Adapter 93 may also include a cover attachment portion 93c to which cover 92 may be attached. The bottle attachment portion 93b may have a larger diameter than the cap attachment portion 93c. Thus, the plastic beverage bottle 90, which may have a relatively large opening 90a, may be attached to the cap 92 by means of the adapter 93.

[00099] Furthermore, according to the embodiments of the cutting device 1 disclosed above, the plastic beverage bottle 90 may have a hole 90c in the bottom 90d of the plastic beverage bottle 90. External air may flow into the bottle of plastic beverage 90 through orifice 90c. If there were no orifices 90c, when the liquid is discharged from the plastic beverage bottle 90 and the liquid level is reduced, a negative pressure can be produced inside the plastic beverage bottle 90. This negative pressure can act as a brake to weaken the liquid ejection speed. However, due to the presence of orifice 90c, external air can flow into the plastic beverage bottle 90 through the orifice 90c, which prevents negative pressure from being produced inside the plastic beverage bottle 90. Thus, an ejection smoothing can be accomplished by using the plastic beverage bottle 90 having an orifice 90c.

[000100] Furthermore, according to the embodiments of the above-disclosed cutting device 1, the tank 70 may have an orifice 70c in its bottom 70d. Therefore, external air can flow into the tank 70. Thus, smooth ejection can be accomplished by using the tank 70 or the plastic beverage bottle 90.

[000101] Note that the present teachings are not limited to the above-discussed embodiment and it is understood that variations and modifications may be made without departing from the spirit and scope of the present teachings. In the embodiments discussed above, a diamond wheel is exemplified as the rotating cutting blade 11. Alternatively, for example, a disc-shaped whetstone or a chip saw may be used as the rotating cutting blade 11. In the embodiments discussed above, an attachment cap 12 that is detachably attached to the main body of the cutting device 10 is exemplified. However, the attachment cap 12 may be formed integrally with the main body of the cutting device 10. In the embodiments discussed above, an ejection port 54 is disposed on the side side of the lower front portion of the rotating cutting blade 11. Alternatively, for example, the ejection port 54 may be disposed on a lateral side of the lower rear portion of the rotating cutting blade 11. In addition, a plurality of ejection ports 54 may be arranged around the rotating cutting blade 11. In embodiments discussed above, an engaging jaw 56 and an outer circumferential recess 61a, which are engageable with each other and both are rectangular as seen in cross section, are exemplified. Alternatively, as long as the engaging jaw 56 and the outer circumferential recess 61a are engageable with each other, they may be of another shape, such as a U-shape, a wedge shape, or a sawtooth shape.

[000102] In the embodiments discussed above, a plastic beverage bottle 90 that is made of polyethylene terephthalate is exemplified as a commercially available plastic beverage bottle. Alternatively, the bottle may be made of plastic materials other than polyethylene terephthalate. In the embodiments discussed above, an orifice 70c in a tank 70 and an orifice 90c in a plastic beverage bottle 90 are exemplified. Alternatively, a plurality of holes may be provided. In addition, a stopper or valve that can be closed for holes 70c, 90c can be provided so that liquid cannot leak out when the tank 70 or the plastic beverage bottle 90 is not in use. Furthermore, in the embodiments discussed above, the attachment 91 is separate from the cap 92 and the adapter 93. Alternatively, the attachment 91 may be integrally formed with the cap 92 and the adapter 93. Furthermore, in the embodiments discussed above, the bottle of plastic beverage 90 is detachably attached to the attachment/detachment portion 50 in a tool-less manner. Alternatively, for example, a configuration may be adopted in which a tool, such as an actuator, is used to secure the plastic beverage bottle 90 to the clamping/detaching portion 50.

Claims (16)

Portable cutting device for cutting stone, characterized in that it comprises: a rotating cutting blade;
a main body of the cutting device that rotatably supports the rotating cutting blade; and
a fixing cover fixed to the main body of the cutting device and covering the rotating cut, where:
the fixing cover includes:
an ejection port that ejects a cutting liquid into a cutting position of the rotating cutting blade;
an attachment/detachment portion that communicates with the ejection port and supplies the cutting fluid to the ejection port; and
a support portion provided on the attachment/detachment portion, and a spout connectable to a water hose is configured to be detachably attached to the attachment/detachment portion in a tool-less manner. Portable cutting device according to claim 1, characterized in that the nozzle or a tank that stores the liquid is selectively attached to the attachment/detachment portion. Portable cutting device, according to claim 2, characterized in that:
the mouthpiece includes an attachment/detachment part on the nozzle side detachably attached to the attachment/detachment part;
the tank includes an attachment/detachment portion on the side of the tank detachably attached to the attachment/detachment portion; and
the nozzle side attachment/removal part has the same configuration as the tank side attachment/removal part. Portable cutting device, according to claims 2 or 3, characterized in that the tank includes an orifice at its bottom. Portable cutting device according to any one of claims 1 to 4, characterized in that:
the main body of the cutting device is held by a user situated behind it; and
the fixing / removing part is provided on a front part of the fixing cover. Portable cutting device according to claim 5, characterized in that the attachment/detachment portion that includes the support portion is angled backwards as it extends upwards. Portable cutting device according to any one of claims 1 to 6, characterized in that:
the support portion is configured to have a half-split structure in which a split right half portion of the support portion is separated from a split left half portion of the support portion in a direction that crosses a direction in which the nozzle is securely attached. detachable for fastening/detaching part; and
the attachment/detachment portion is exposed to the outside when the support portion is divided into a right half and a left half portion. Portable cutting device according to any one of claims 1 to 7, characterized in that: the attachment/removal part includes:
a latching jaw which projects inwardly in a radial direction of the clamping/detachment portion and which is movable in the radial direction of the clamping/detachment portion; and
a polarizing member polarizing the engaging jaw inwardly in the radial direction of the attachment/detachment portion;
the spout includes: an outer circumferential recess configured to engage the engaging jaw due to a protrusion/recess configuration; and
a guide surface disposed closer to one side of the nozzle end than the outer circumferential recess; and
the guide surface is angled outwardly in a radial direction of the nozzle, so that the guide surface extends outward from the end portion of the nozzle towards a base portion of the nozzle. Portable cutting device according to any one of claims 1 to 8, characterized in that: the attachment/removal part includes:
a fluid flow path through which cutting fluid flows from an upper portion of the attachment/uncoupling portion to the ejection port;
an on/off faucet that selectively opens and closes the fluid flow path; and
an open/close lever which is connected to the open/close cock and which is exposed to the outside of the attach/detach part;
the open/close cock and the open/close lever are configured to be rotatable around an axis that intercepts the fluid flow path; and
the fluid flow path is opened and closed by rotating the open/close cock. Portable cutting device according to any one of claims 1 to 9, characterized in that the main body of the cutting device includes a light for illuminating the cutting position of the rotating cutting blade. Portable cutting device, according to claim 10, characterized in that it additionally comprises:
a base above which the main body of the cutting device is supported; and
a tilt support shaft supporting the main body of the cutting device at an angle with respect to the base,
where the light is arranged on an opposite side of the rotating cutting blade to the tilt support axis Portable cutting device for cutting stone, characterized in that it comprises:
a rotating cutting blade;
a main body of the cutting device that rotatably supports the rotating cutting blade; and
a fixing cover fixed to the main body of the cutting device and covering the rotating cutting blade, where:
the fixing cover includes:
an ejection port that ejects a cutting liquid into a cutting position of the rotating cutting blade;
an attachment/detachment portion that communicates with the ejection port and supplies the cutting fluid to the ejection port; and
a support portion provided on the attachment/detachment portion, and a commercially available plastic beverage bottle is configured to be detachably attached to the attachment/detachment portion. Portable cutting device according to claim 12, characterized in that it additionally comprises an accessory through which the commercially available plastic beverage bottle is detachably attached to the attachment/removal portion, wherein:
the commercially available plastic beverage bottle is provided with a male thread on the outer circumferential periphery of an opening thereof; and
the accessory is provided with a female thread which engages the male thread of the commercially available plastic beverage bottle. Portable cutting device according to claim 13, characterized in that the connection includes:
a cap that can be engaged with the attachment/removal part; and
a commercially available plastic beverage bottle pluggable adapter. Portable cutting device, according to claim 14, characterized in that:
the adapter includes a bottle-side fastening part to which the commercially available plastic beverage bottle is fastened and a cap-side fastening part to which the lid is fastened; and
the bottle-side fixing part has a larger diameter than the cap-side fixing part. Portable cutting device according to any one of claims 12 to 15, characterized in that the commercially available plastic beverage bottle includes a hole in a bottom thereof

Images