JP2013244578A - Portable cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of a portable cutting machine which cuts a work material by a disk-like blade by driving and rotating the blade.SOLUTION: A portable cutting machine 10 has a blade cover 41 which partially covers an outer circumferential part and both side faces of a blade 31, and the blade cover 41 freely rotates in the center of rotation of the blade 31. The blade cover 41 is provided with a nozzle 42 for water jetting which jets water to the blade 31, and a water jetting hose 45 is connected between a joint 47 provided at a rear end of a cutting machine body and the nozzle 42 for water jetting. At a tip of an arm cover 28, a hose holder 50 is provided which fixes a water jetting hose 45 to the arm cover 28.

Description

  The present invention relates to a portable cutting machine that rotates a disk-shaped blade and cuts a work material with the blade.

  A portable cutting machine is used to perform a cutting operation such as creasing on a stone or concrete as a work material by a disk cutter, that is, a disk-shaped blade. The portable cutting machine is equipped with a drive source such as an engine or an electric motor, and the blade is driven to rotate by the drive source. When performing a cutting operation with a portable cutting machine, water is supplied to the blade in order to cool the blade during the cutting operation and suppress the generation of dust from the work material.

  A blade cover is provided for portable cutting so as to partially cover the outer peripheral surface and both side surfaces of the blade. A water injection nozzle for ejecting water to the blade is provided on one side surface or both side surfaces of the blade cover. In order to supply water to the water injection nozzle, a fitting connected to a water supply source such as a water supply or a water tank is attached to the cutting machine body, and a water injection hose is connected between this joint and the water injection nozzle. Has been. Patent Document 1 describes a portable cutting machine in which water injection nozzles are provided on both side surfaces of a blade cover.

JP 2006-198765 A

  The blade cover is rotatable about the rotation center of the blade. When cutting the horizontal surface of the work material using a portable cutting machine, the blade cover is rotated toward the tip end side of the blade so as to mainly cover the upper side portion of the blade. On the other hand, when cutting the vertical surface of the work material, the blade cover is rotated toward the rear end side of the blade so as to cover mainly the rear end side of the blade. As described above, the blade cover can be rotated according to work, but when the blade cover is rotated, the position of the water injection nozzle attached to the blade cover is also synchronized with the rotation of the blade cover. It moves in the front-rear direction of the portable cutting machine.

  Therefore, if the position of the water injection nozzle changes back and forth with the rotation of the blade cover, the distance between the joint and the water injection nozzle also changes, and the water injection hose connecting the joint and the water injection nozzle The minimum required length will also vary. The length of the water injection hose is set according to the rotation position of the blade cover where the water injection nozzle is at the forward limit position and the distance between the joint and the water injection nozzle is the longest so that the blade cover can be rotated. ing.

  For this reason, when the blade cover is rotated so as to cover the rear end portion side of the blade, the water injection nozzle moves toward the rear end portion side of the blade, and the distance between the water injection nozzle and the joint is short. As a result, sagging occurs in the water injection hose. When sagging occurs in the water injection hose, the rotating operation of the blade cover may be hindered or the operator may be contacted to reduce workability, and the water injection hose may be damaged due to contact with other parts.

  An object of the present invention is to improve the workability of a portable cutting machine.

  The portable cutting machine of the present invention is a portable cutting machine that drives a blade by a drive source incorporated in a cutting machine body, the arm cover provided on an arm that rotatably supports the blade, and the blade A blade cover that is rotatable about a rotation center axis of the blade and partially covers an outer peripheral surface and both side surfaces of the blade, and a water injection nozzle that is provided on the blade cover and injects water onto the blade. And a water supply hose that connects the water supply source and the water injection nozzle, and a hose holder that is provided on the distal end side of the arm cover and supports the water supply hose to the arm cover.

  In the portable cutting machine of the present invention, the water injection nozzle is moved from the water injection nozzle when the water injection nozzle is moved to the retreat limit position toward the cutting machine main body with the cutting machine main body arranged on a horizontal plane. The hose holder is provided on the distal end side of the arm cover from a vertical line extending in a vertical direction on a horizontal plane. The portable cutting machine of the present invention is characterized in that the hose holder is provided in an imaginary circle centered on the rotation center of the blade cover and having a width dimension of the arm cover as a diameter. The portable cutting machine of the present invention has a forward limit side diameter line passing through the water injection nozzle and the rotation center of the blade cover when the water injection nozzle moves to the forward limit position with respect to the cutting machine body. In the range of the included angle formed by the retraction limit side diameter line passing through the water injection nozzle and the rotation center of the blade cover when the water injection nozzle moves to the retreat limit position toward the cutting machine main body. A hose holder is provided.

  The portable cutting machine according to the present invention is characterized in that the hose holder is provided at the center of rotation of the blade cover. In the portable cutting machine according to the present invention, the hose holder is fixed to the arm cover and is connected to a fixed joint member to which a proximal end portion of the water injection hose is connected, and is rotatably attached to the fixing member. A tip end portion of the water injection hose is connected, and the rotary joint member communicates the base end portion and the tip end portion of the water injection hose. The portable cutting machine according to the present invention is characterized in that the hose holder includes a base portion rotatably attached to the arm cover, and a clamp piece provided on the base portion and fixing the water injection hose.

  In the portable cutting machine of the present invention, the water injection hose connected between the water injection nozzle provided on the blade cover and the joint is fixed by the hose holder provided at the tip of the arm cover. Even if the water injection nozzle moves in the front-rear direction of the portable cutting machine due to the rotation of the blade cover, the base end portion between the joint and the hose holder of the water injection hose does not sag or bend, The workability of the portable cutting machine can be improved.

It is a front view which shows the portable cutting machine in the state which the blade cover rotated to the forward limit position. It is a front view which shows the portable cutting machine in the state which the blade cover rotated to the retreat limit position. It is an expanded sectional view which shows the part of the engine in the AA line of FIG. It is an expanded sectional view which shows the part of the nozzle for water injection in the BB line of FIG. It is an expanded sectional view which shows the part of the hose holder in the CC line of FIG. It is a front view of the portable cutting machine which shows the attachment possible position of the hose holder provided in an arm cover. It is a front view which shows the modification of a portable cutting machine. It is an expanded sectional view which shows the part of the hose holder in the DD line | wire of FIG. It is a front view which shows the portable cutting machine as a comparative example in the state which the blade cover rotated to the forward limit position. It is a front view which shows the portable cutting machine as a comparative example in the state which the blade cover rotated to the retreat limit position.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The portable cutting machine 10 has a main body case 11 as a main body of a cutting machine, and an engine 12 as a drive source is incorporated in the main body case 11 as shown in FIG. The engine 12 includes a crankcase 14 on which a crankshaft 13 is rotatably mounted, and a cylinder 16 in which a piston 15 is reciprocally incorporated. The crankcase 14 is formed by two left and right case bodies 14a and 14b in FIG. The piston 15 is connected to the crankshaft 13 by a connecting rod 17, and the crankshaft 13 is rotationally driven by the reciprocating motion of the piston 15. The air-fuel mixture is supplied to the combustion chamber 18 in the cylinder 16 from an intake port (not shown), and the combustion exhaust gas is discharged to the outside from an exhaust port (not shown). In order to start the engine 12, a recoil starter 19 is provided on the case body 14 a of the crankcase 14, and the recoil starter 19 is connected to one protruding end of the crankshaft 13. The cylinder 16 is provided with a spark plug 20 for igniting the air-fuel mixture supplied into the combustion chamber 18.

  A centrifugal clutch 21 is attached to the other protruding end of the crankshaft 13. The centrifugal clutch 21 has a rotor 22 fixed to the crankshaft 13 and a clutch drum 23 in which the rotor 22 is accommodated, and a plurality of clutch shoes mounted on the rotor 22 in a swingable manner in the clutch drum 23. 24 is incorporated. When the rotational speed of the crankshaft 13 increases to the set rotational speed, the clutch shoe 24 comes into close contact with the inner peripheral surface of the clutch drum 23 by centrifugal force against the spring force, and the rotation of the crankshaft 13 causes the clutch drum 23 to rotate. Is transmitted to. A drive-side pulley 25 is attached to the clutch drum 23, and this pulley 25 is rotatably attached to the crankshaft 13 via a bearing 26.

  As shown in FIGS. 1 and 2, an arm 27 is formed on the case body 14 b of the crankcase, and the arm 27 is covered with an arm cover 28. A driven rotation shaft (not shown) is rotatably mounted on the tip of the arm 27, and a disk cutter, that is, a disk-shaped blade 31 is attached to the rotation shaft. In order to transmit the power of the engine 12 to the blades 31, a belt 33 is stretched between a driven pulley 32 and a driving pulley 25 attached to a rotating shaft. Thereby, when the rotation of the crankshaft 13 is transmitted to the clutch drum 23, the rotational torque of the crankshaft 13 is transmitted to the blade 31 via the pulley 25, the belt 33 and the pulley 32. A portion between the crankshaft 13 and the driven pulley 32 attached to the rotating shaft constitutes a power transmission system for transmitting engine power to the blade 31.

  As shown in FIGS. 1 and 2, a rear handle 34 is attached to the rear portion of the main body case 11 so as to protrude rearward, and a front handle 35 is attached to the front portion of the main body case 11 so as to cross the main body case 11. It has been. When an operator performs cutting work on a workpiece with the portable cutting machine 10, the rear handle 34 is held with one hand, the front handle 35 is held with the other hand, and the portable cutting machine 10 is lifted. Become. When the portable cutting machine 10 is not used, the portable cutting machine 10 is disposed on the base surface at the leg portions 36 and 37 provided at the front and rear of the main body case 11. Under this state, the blade 31 does not contact the base surface. The rear handle 34 is provided with a throttle lever 38 for adjusting the rotational speed of the engine 12.

  A blade cover 41 is attached to the arm 27 as shown in FIGS. 1 and 2, and the blade cover 41 is rotatable about the rotation center of the blade 31. The blade cover 41 covers the outer peripheral surface and both side surfaces mainly on the rear side of the blade 31. As shown in FIG. 4, the blade cover 41 includes a peripheral wall portion 41a partially covering the outer peripheral surface of the blade 31, and left and right side wall portions integrally covering both sides of the blade 31 and partially covering the side surface of the blade 31. 41b. Two water injection nozzles 42 are attached to the respective side wall portions 41b so as to face each other. An injection port 43 is provided at the tip of each water injection nozzle 42, and water is injected from the respective injection ports 43 onto the surface of the blade 31. Thereby, the blade 31 being cut is cooled and scattering of dust generated during cutting is suppressed. Both the water injection nozzles 42 are connected to each other by a connection hose 44, and in order to supply water to each water injection nozzle 42, the water injection hose 45 is used for one water injection as shown in FIGS. It is connected to the nozzle 42. The water injection nozzle 42 is provided on both side wall portions 41b, but may be provided on one side wall portion 41b.

  Since the water injection nozzle 42 is attached to a rotatable blade cover 41, when the blade cover 41 is rotated, the water injection nozzle 42 moves in the front-rear direction of the main body case 11 as a cutting machine main body. Become. For example, when cutting the horizontal surface of the work material by the portable cutting machine 10, the blade cover 41 is rotated toward the tip end side of the blade 31 so as to cover the upper portion of the blade 31. FIG. 1 shows a state where the blade cover 41 is rotated toward the tip end side of the blade 31 and the water injection nozzle 42 is in the forward limit position. On the other hand, for example, when cutting the vertical surface of the work material, the blade cover 41 is rotated toward the rear end side of the blade 31 so as to cover the rear end side of the blade 31. FIG. 2 shows a state where the blade cover 41 is rotated toward the rear end side of the blade 31 and the water injection nozzle 42 is in the retreat limit position. The rotation range of the blade cover 41 is regulated by a stopper (not shown).

  As shown in FIGS. 1 and 2, the water injection hose 45 is connected to an on-off valve 46 attached to the rear end portion of the main body case 11. A joint 47 is attached to the inlet of the on-off valve 46, and the water injection hose 45 is connected to the joint 47 through the on-off valve 46. A water supply hose (not shown) is connected to the joint 47, and water from an external water supply source such as a water supply or a water tank is supplied to the water injection hose 45 via the on-off valve 46.

  In order to support the water injection hose 45 to the arm cover 28 at a portion between the water injection nozzle 42 and the joint 47, a hose holder 50 is provided at the tip of the arm cover 28. As shown in FIG. 5, the hose holder 50 includes a fixed joint member 51 provided on the distal end side of the arm cover 28. The fixed joint member 51 includes a cylindrical base portion 51a protruding from the arm cover 28, and a cylindrical hose connection portion 51b protruding in a radial direction from the base portion 51a and connected to the base end portion 45a of the water injection hose 45. I have. A rotary joint member 52 is rotatably attached to the base 51a of the fixed joint member 51. The rotary joint member 52 includes a cylindrical fitting portion 52a fitted into the base portion 51a, and a cylinder protruding in a radial direction from a protruding end of the fitting portion 52a and connected to a tip portion 45b of the water injection hose 45. And a hose connection portion 52b having a shape.

  A stopper 53 is attached to each of the annular grooves formed on the inner peripheral surface of the base portion 51 a of the fixed joint member 51 and the outer peripheral surface of the fitting portion 52 a of the rotary joint member 52, and the rotary joint member 52 is attached by the stopper 53. Disengagement from the fixed joint member 51 is prevented. In order to prevent water from leaking from between the base portion 51a and the fitting portion 52a, a sealing material 54 is mounted between the base portion 51a and the fitting portion 52a. Water that has flowed into the base end portion 45 a of the water injection hose 45 from the outside is guided to the tip end portion 45 b of the water injection hose 45 through the fixed joint member 51 and the rotary joint member 52 that constitute the hose holder 50, and the water injection nozzle 42. To the blade 31.

  As shown in FIG. 5, the rotary joint member 52 is rotatable to the fixed joint member 51 around the rotation center O of the blade cover 41, and the water injection nozzle 42 is rotated by rotating the blade cover 41. When moving between the forward limit position shown in FIG. 1 and the backward limit position shown in FIG. 2, the distal end portion 45 b of the water injection hose 45 swings around the hose holder 50. However, since the base end portion 45a of the water injection hose 45 is supported by the hose holder 50, even if the water injection nozzle 42 moves between the forward limit position and the reverse limit position, There is no displacement. Thereby, when an operator cuts a work material using the portable cutting machine 10, the blade cover 41 can be easily rotated, and the water injection hose 45 contacts the operator during the cutting operation. Thus, the workability of the cutting work can be improved.

  FIG. 6 is a front view of the portable cutting machine showing the position where the hose holder 50 can be attached. In FIG. 6, the state in which the water injection nozzle 42 is in the forward limit position by the rotation of the blade cover 41 is indicated by a solid line, and the state in which the water injection nozzle 42 is in the reverse limit position is indicated by a two-dot chain line.

  In the portable cutting machine 10 shown in FIGS. 1 and 2, the hose holder 50 is attached to the rotation center O of the blade cover 41. It is not limited to the position of the moving center O part. As shown in FIG. 6, the water injection nozzle 42 when the water injection nozzle 42 moves to the retreat limit position as indicated by a two-dot chain line with the main body case 11 disposed on the horizontal plane H. Assuming that the imaginary line extending in the vertical direction from the horizontal plane H to the horizontal plane H is the vertical line V, it is preferable that the hose holder 50 is attached to a region of the arm cover 28 that is closer to the tip than the portion through which the vertical line V passes. If the hose holder 50 is attached to this region, the base end portion 45a of the water injection hose 45 may be greatly slackened even if the water injection nozzle 42 moves in the range from the forward limit position to the reverse limit position due to the rotation of the blade cover 41. The workability of the portable cutting machine 10 can be improved without being bent.

  FIG. 6 shows a virtual circle S centered on the rotation center O of the blade cover 41 with the width dimension of the arm cover 28 as the diameter D. When the hose holder 50 is attached within the range of the virtual circle S shown in FIG. 6 in the tip portion of the arm cover 28, the water injection is performed more than when the hose holder 50 is attached closer to the vertical line V than the virtual circle S. The slack of the base end portion 45a of the hose 45 and the occurrence of bending can be reduced.

  In FIG. 6, the diameter line passing through the water injection nozzle 42 and the rotation center O when the water injection nozzle 42 is moved to the forward limit position is defined as the forward limit side diameter line T1, and the water injection nozzle 42 is moved to the backward limit position. The diameter lines T1 and T2 are shown when the diameter line passing through the water injection nozzle 42 and the rotation center O is the receding limit side diameter line T2. Assuming that the acute angle region sandwiched between the forward limit side diameter line T1 and the backward limit side diameter line T2 is the sandwiching angle θ, the hose holder 50 is located within the range of the sandwiching angle θ, that is, the rotation of the tip of the arm cover 28. When the blade cover 41 is attached to a position shifted vertically in FIG. 6 with respect to the moving center O, the base end portion 45a of the water injection hose 45 when the blade cover 41 is rotated and the occurrence of bending can be reduced. .

  FIG. 7 is a front view showing a modification of the portable cutting machine, and FIG. 8 is an enlarged cross-sectional view showing a portion of the hose holder along the line DD in FIG. In these drawings, members that are the same as those in the drawings described above are given the same reference numerals.

  As shown in FIG. 8, the hose holder 50 attached to the distal end side of the arm cover 28 has a base portion 55 that is rotatably attached to the arm cover 28. Projects from both inside and outside. A circular flange 55a is provided at the outward projecting end of the base 55, and an annular stopper 56 is attached to the inward projecting end. Thus, the hose holder 50 is prevented from being detached from the arm cover 28 by the flange 55a and the stopper 56. The base 55 is provided with a clamp piece 57 having a circular arc cross section so as to sandwich the water injection hose 45 from both sides. Therefore, when this hose holder 50 is used, in the case of the water injection hose 45 described above, the water injection hose 45 is separated into the base end portion 45a and the tip end portion 45b, whereas the water injection hose 45 is connected to one hose. Thus, the base end portion 45a and the tip end portion 45b can be configured.

  As shown in FIG. 7, the hose holder 50 shown in FIG. 8 is attached to a position shifted from the rotation center O of the blade cover 41 in the tip portion of the arm cover 28. As shown in FIG. 1, when this attachment position is the position of the rotation center O, the base end portion 45a of the water injection hose 45 when the blade cover 41 is rotated and the occurrence of bending are reduced. can do.

  As shown in FIG. 6, the hose holder 50 shown in FIG. 8 is attached to the arm cover 28 so that the hose holder 50 is attached to a region closer to the tip than the portion through which the vertical line V passes. Thus, the workability of the portable cutting machine 10 can be improved without setting the position of the rotation center O. More preferably, the hose holder 50 is preferably attached within the range of the virtual circle S shown in FIG. 6, and further, the forward limit side diameter line T1 and the backward limit side diameter line T2 of the virtual circle S are It is preferable to attach the hose holder 50 within the range of the included angle θ.

  As described above, as the hose holder 50, as shown in FIG. 5, a form having the fixed joint member 51 and the rotary joint member 52 or a form having the clamp piece 57 as shown in FIG. 7 is used. can do. Moreover, the workability of the portable cutting machine 10 can be improved by using not only the rotation center O of the blade cover 41 but also the tip of the arm cover 28 as a position where the hose holder 50 is attached.

  9 and 10 are front views showing a portable cutting machine 10 as a comparative example. In these drawings, members that are the same as those in the portable cutting machine described above are given the same reference numerals.

  In the portable cutting machine 10 shown in FIGS. 9 and 10, the water injection hose 45 connected between the joint 47 and the water injection nozzle 42 is not fixed to the distal end portion of the arm cover 28. As shown in FIG. 9, when cutting the horizontal surface W <b> 1 of the work material by the portable cutting machine 10, the blade cover 41 is rotated toward the tip end side of the blade 31. At this time, the water injection nozzle 42 moves forward with respect to the main body case 11. In contrast, as shown in FIG. 10, when cutting the vertical surface W <b> 2 of the work material, the blade cover 41 is rotated so as to cover the rear end side of the blade 31. At this time, the water injection nozzle 42 moves rearward with respect to the main body case 11. When the length of the water injection hose 45 is set to the length when the water injection nozzle 42 has moved to the forward limit position as shown in FIG. 9, the water injection nozzle 42 is moved to the backward limit position as shown in FIG. The water injection hose 45 will sag or bend when it is moved to. During operation of the portable cutting machine 10, the water injection hose 45 may sag upward on the arm cover 28 or sag downward on the main body case 11 as shown in FIG. 10.

  As shown in FIG. 10, if the water injection hose 45 is slacked or curved as a whole, workability is reduced. On the other hand, when the hose holder 50 is provided at the tip of the arm cover 28 and the water injection hose 45 is fixed by the hose holder 50, the base end portion 45a of the water injection hose 45, that is, the portion between the joint 47 and the hose holder 50 is injected with water. Even if the working nozzle 42 moves in the front-rear direction, the operability can be improved because it does not sag. Furthermore, when the water injection hose 45 sags, the water injection hose 45 may come into contact with other parts and the water injection hose 45 may be damaged. However, the water injection hose 45 can be prevented from being damaged.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, although the illustrated portable cutting machine uses the engine 12 as a drive source, the present invention can also be applied to a portable cutting machine using an electric motor as a drive source.

DESCRIPTION OF SYMBOLS 10 ... Portable cutting machine, 11 ... Main body case (cutting machine main body), 12 ... Engine, 13 ... Crankshaft, 14 ... Crankcase, 15 ... Piston, 16 ... Cylinder, 17 ... Connecting rod, 18 ... Combustion chamber, 19 ... Recoil starter, 20 ... Spark plug, 21 ... Centrifugal clutch, 22 ... Rotor, 23 ... Clutch drum, 24 ... Clutch shoe, 25 ... Pulley, 26 ... Bearing, 27 ... Arm, 28 ... Arm cover, 31 ... Blade, 32 ... Pulley, 33 ... Belt, 34 ... Rear handle, 35 ... Front handle, 36, 37 ... Leg, 38 ... Throttle lever, 41 ... Blade cover, 42 ... Water injection nozzle, 43 ... Injection port, 44 ... Connection hose, 45 ... Water injection hose, 45a ... Base end portion, 45b ... Tip end portion, 46 ... Open / close valve, 47 ... Joint, 50 ... Hose holder, 51 Fixed joint member, 52 ... Rotary joint member, 53 ... Stopper, 54 ... Sealing material, 55 ... Base, 56 ... Stopper, 57 ... Clamp piece, H ... Horizontal plane, O ... Rotation center, S ... Virtual circle, T1 ... Advance Limit side diameter line, T1 ... diameter line, T2 ... retraction limit side diameter line, V ... vertical line, .theta.

Claims (7)

A portable cutting machine that drives a blade by a driving source incorporated in a cutting machine body,
An arm cover provided on an arm that rotatably supports the blade;
A blade cover provided so as to be rotatable around a rotation center axis of the blade, and partially covering an outer peripheral surface and both side surfaces of the blade;
A nozzle for water injection provided on the blade cover and for injecting water onto the blade;
A water injection hose connecting a water supply source and the water injection nozzle;
A portable cutting machine comprising: a hose holder provided on a distal end side of the arm cover and supporting the water injection hose on the arm cover.   From the vertical line extending vertically from the water injection nozzle to the horizontal plane when the water injection nozzle is moved to the retreat limit position toward the cutting machine main body with the cutting machine main body arranged on a horizontal plane. The portable cutting machine according to claim 1, wherein the hose holder is provided on a distal end side of the arm cover.   The portable cutting machine according to claim 1 or 2, wherein the hose holder is provided in a virtual circle whose diameter is the width of the arm cover with the rotation center of the blade cover as a center.   When the water injection nozzle moves to the forward limit position with respect to the cutting machine main body, the forward limit side diameter line passing through the water injection nozzle and the rotation center of the blade cover, and the water injection nozzle is the cutting machine. The hose holder is provided in a range of a narrow angle formed by a retraction limit side diameter line passing through the water injection nozzle and the rotation center of the blade cover when moved to a retreat limit position toward the main body. The portable cutting machine of any one of Claims 1-3.   The portable cutting machine according to any one of claims 1 to 4, wherein the hose holder is provided at a rotation center portion of the blade cover.   The hose holder is fixed to the arm cover and is connected to the fixed joint member to which the proximal end portion of the water injection hose is connected, and the distal end portion of the water injection hose is connected to the fixing member so as to be rotatable. The portable cutting machine according to any one of claims 1 to 5, further comprising a rotary joint member that communicates a base end portion and a tip end portion of the water injection hose.   The said hose holder has a base part rotatably attached to the said arm cover, and a clamp piece which is provided in the said base part and fixes the said water injection hose, The any one of Claims 1-5 characterized by the above-mentioned. A portable cutting machine as described in 1.

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