Cutting machine

Abstract

The present invention provides a cutting machine capable of supporting sheet-like materials. The cutting machine (1) has a housing housing a motor, a cutting blade (18) driven by the motor, a first support portion (50) provided in the housing, and a second support portion (60) provided in the housing and separated from the first support portion (50). The cutting blade (C) is supported by bringing the surface (c1) of the cutting blade (C) against the first support portion (50) and bringing the back surface (c2) of the cutting blade (C) opposite to the surface (c1) against the second support portion (60).

Description

Technical Field

[0001] This invention relates to a cutting machine suitable for cutting plywood, gypsum board, etc. Background Technology

[0002] As one type of cutting machine, a cutting machine having a cutting blade driven reciprocatingly by a motor and used for cutting plywood, drywall, etc. is known (see Patent Document 1). This type of cutting machine is also sometimes referred to as a "cutting machine" or "cardboard cutter". Another type of cutting machine is known, which has a cutting blade driven by a rotating motor. This type of cutting machine is also used for cutting plywood, drywall, etc.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-63808 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] The operations using cutting machines are complex. Specifically, the objects being cut (e.g., plywood, drywall, etc.) are sometimes in low places (floors, workbenches, etc.) and sometimes in high places (ceilings, etc.). For example, sometimes a cutting machine is used to cut a section of the ceiling to create an air conditioner installation port or inspection opening. When cutting a section of the ceiling, it is necessary to support the cut section (the plate-like cutting blade) to prevent it from falling.

[0008] However, the operator's right or left hand is occupied while holding the cutting machine. Therefore, the operator must support the cutting blade with one hand, making it difficult to support the cutting blade stably.

[0009] The purpose of this invention is to provide a cutting machine that can support plate-shaped bodies.

[0010] Solution for solving the problem

[0011] The cutting machine includes: a housing housing a motor; a cutting blade driven by the motor; a first support portion disposed in the housing; and a second support portion disposed in the housing and separated from the first support portion. Furthermore, by having a first surface of a plate-like body abut against the first support portion and a second surface of the plate-like body opposite to the first surface abut against the second support portion, the plate-like body can be supported.

[0012] The effects of the invention

[0013] According to the present invention, a cutting machine capable of supporting sheet-like materials can be realized. Attached Figure Description

[0014] Figure 1 This is a left-side view of the cutting machine.

[0015] Figure 2 It is a 3D diagram of a cutting machine.

[0016] Figure 3 It is a cross-sectional view showing the structure of the cutting machine.

[0017] Figure 4 This is an explanatory diagram showing an example of the operating status of a cutting machine.

[0018] Figure 5 This is another illustration of an example showing the operating status of a cutting machine.

[0019] Figure 6 This is another illustration of an example showing the operating status of a cutting machine.

[0020] Figure 7 This is another illustration of an example showing the operating status of a cutting machine.

[0021] Figure 8 This is a left-side view of the cutting machine before the cover components are installed.

[0022] Figure 9 This is a left-side view of the cutting machine after the cover assembly has been installed.

[0023] Figure 10 (a) is a side view of the cover component, and (b) is a perspective view of the cover component.

[0024] Figure 11 This is a cross-sectional view of a cutting machine with a covered component installed.

[0025] Figure 12 (a) is a top view of the main body of the base, and (b) is a top view of the cover of the base.

[0026] Figure 13 This is a top view of the base.

[0027] Figure 14 This is a magnified three-dimensional view of the retaining part.

[0028] Figure 15 This is a magnified three-dimensional view of another part of the retaining section.

[0029] Figure 16 This is a partially enlarged cross-sectional view showing the holding state of the retaining part on the cover component.

[0030] Figure 17This is a side view showing an example of the use of a hook and hanger.

[0031] In the picture:

[0032] 1—Cut machine, 10—Outer casing, 10R—First outer casing component, 10L—Second outer casing component, 11—Motor housing, 12—Base support, 12e—Rear end, 13—Motor, 15a—Small diameter bevel gear, 15b—Large diameter bevel gear, 16—Mounting rod, 17—Swing shaft, 18—Cut blade, 20—Handle, 21—Switch, 30—Base, 30e—Rear end, 31—Main body, 32—Cover, 33—Abutting surface, 34—Opening, 34a—First opening, 34b—Second opening, 35—Connecting part, 36—Marking, 40—Dust collection housing, 41—Button, 50—First support, 5 0a—Rubber component, 60—Second support, 60a—Rubber component, 70—Insertion space, 80—Cover component, 81—Bottom, 82—Side wall, 83—Modible piece, 83a—Contact part, 83b—Protrusion, 84—Accommodation space, 85—Slit, 86—Claw, 87—Protrusion, 90—Retaining part, 90a—Retaining claw, 95—Hook, 96—Tube, A—Ceiling, B—Opening, C—Plate-shaped body (cutting piece), D1, D2, D3—Gap, L1, L2—Total length, P—Center of gravity, X—Baseline, Y—Axis, c1—First surface, c2—Second surface, θ—Angle. Detailed Implementation

[0033] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 , Figure 2 The illustrated cutting machine 1 is an example of a cutting machine to which the present invention is applied. The cutting machine 1 shown has a housing 10, a handle 20, a base 30 and a dust collection housing 40, and is suitable for cutting plywood, gypsum board and other boards.

[0034] The housing 10 includes a generally cylindrical motor receiving portion 11 and a base support portion 12 supporting the base 30. The motor receiving portion 11 and the base support portion 12 are integrally formed from resin material. That is, the motor receiving portion 11 forms one part of the housing 10, and the base support portion 12 forms another part of the housing 10. Furthermore, the housing 10 includes a first housing component 10R forming half of the motor receiving portion 11 and the base support portion 12, and a second housing component 10L forming the remaining half of the motor receiving portion 11 and the base support portion 12. The first housing component 10R and the second housing component 10L are fixed to each other in a mating state to form the housing 10.

[0035] The dust collection housing 40 is located at one end of the motor housing 11 along its long side and has a box-shaped appearance with its long side perpendicular to the long side of the motor housing 11. In the following description, the long side of the motor housing 11 is defined as the front-rear direction, the side where the dust collection housing 40 is located is defined as the front, and the side opposite to the side where the dust collection housing 40 is located is defined as the rear. Furthermore, the long side of the dust collection housing 40 is defined as the up-down direction, the side where the base 30 is located is defined as the upper direction, and the side where the handle 20 is located is defined as the lower direction. Moreover, a third direction perpendicular to the front-rear and up-down directions is defined as the left-right direction. Additionally, as... Figure 1 As shown, the long side of the motor housing 11 is aligned with the long side of the base 30. That is, the long side of the base 30 is also in the front-to-back direction.

[0036] According to the above definition, the handle 20 is located on the lower side of the housing 10, the base 30 is located on the upper side of the housing 10, and the dust collection housing 40 is located on the front side of the housing 10. In addition, the first housing component 10R forms the right half of the housing 10, and the second housing component 10L forms the left half of the housing 10.

[0037] like Figure 3 As shown, motor 13 is housed in motor housing 11 of housing 10. In addition to motor 13, housing 10 also houses reduction gears, conversion mechanisms, etc. Motor 13 is an electric motor powered by a battery (e.g., a lithium-ion battery) 14 mounted at the lower end of handle 20. Motor 13 is a brushless motor comprising a motor housing housing housing a rotor and a stator, an output shaft fixed to the rotor and rotating integrally with the rotor, etc. The output shaft is rotatably supported by bearings, and a small-diameter bevel gear 15a is provided at the front end of the output shaft.

[0038] Small-diameter bevel gear 15a meshes with large-diameter bevel gear 15b, which rotates about a straight line extending in a direction intersecting the output shaft. The small-diameter bevel gear 15a and large-diameter bevel gear 15b constitute a speed reduction mechanism that reduces the rotational speed of the output shaft of motor 13 and increases the torque.

[0039] An eccentric cam is provided on the support shaft where the large-diameter bevel gear 15b is located. The eccentric cam rotates around a straight line extending in a direction intersecting the output shaft of the motor 13, just like the large-diameter bevel gear 15b. However, the eccentric cam is eccentric relative to the large-diameter bevel gear 15b.

[0040] A mounting rod 16, roughly L-shaped in side view, is provided inside the housing 10. The mounting rod 16 is supported by a swing shaft 17 and can move vertically and horizontally. The lower part of the mounting rod 16 engages with an eccentric cam, and the upper part of the mounting rod 16 is connected to a cutting blade 18. The mounting rod 16, engaged with the eccentric cam, moves periodically with the rotation of the eccentric cam. Specifically, the mounting rod 16 reciprocates periodically in the vertical and horizontal directions and in the horizontal and vertical directions as the eccentric cam rotates. The cutting blade 18, connected to the mounting rod 16, moves according to the periodic movement of the mounting rod 16, cutting objects such as sheet metal. Thus, the eccentric cam and the mounting rod 16 constitute a conversion mechanism that converts the rotational motion of the output shaft of the motor 13 into the reciprocating motion (swinging) of the cutting blade 18.

[0041] When the switch 21 located at the upper end of the handle 20 is operated, power is supplied to the motor 13, and the output shaft of the motor 13 rotates. As described above, the rotational motion of the output of the motor 13 is slowed down by the reduction mechanism (small diameter bevel gear 15a and large diameter bevel gear 15b) and converted into the reciprocating motion of the cutting blade 18 by the conversion mechanism (eccentric cam and mounting rod 16). The user holds the handle 20 with his right or left hand and operates the switch 21 with the index finger of the hand holding the handle 20. For example, the user holds the handle 20 with his right hand and operates the switch 21 with the index finger of his right hand while moving the cutting machine 1 from rear to front. That is, the cutting machine 1 is pulled forward.

[0042] Refer to Figure 1 , Figure 2 The base 30 has a generally rectangular shape with its longer side in the rear-to-rear direction. The base 30 has a double-layer structure, comprising a main body 31 fixed to the outer shell 10 (base support 12) and a cover 32 stacked on top of the main body 31. To improve rigidity, the main body 31 has a connecting portion 35 with embedded metal. Figure 12 (a) The main body 31 is fixed to the outer casing 10 by a threaded member inserted into a through hole provided in the connecting part 35. The cover part 32 can be attached to and detached from the main body 31 fixed to the outer casing 10. One side of the cover part 32 installed on the main body 31 (the other side opposite to the side opposite to the side of the main body 31) forms an abutment surface 33 that abuts against the surface of the object when cutting it.

[0043] The base 30 spans the outer shell 10 and the dust collection shell 40. Specifically, the rear of the base 30 overlaps with the upper part of the outer shell 10 (base support 12), and the front of the base 30 overlaps with the upper part of the dust collection shell 40.

[0044] like Figure 3As shown, the base 30 has an opening 34 that communicates with the dust collection shell 40. The cutting blade 18 passes through the opening 34, and a portion of the cutting blade 18 protrudes from the contact surface 33. When the cutting blade 18 is reciprocated (oscillating) with the contact surface 33 against the surface of the object, the protruding portion of the cutting blade 18 protruding from the contact surface 33 cuts the object.

[0045] In addition, triangular protrusions and V-shaped grooves are respectively provided on the front and back of the base 30. Figure 13 On the other hand, the cutting blade 18 is positioned on an imaginary straight line connecting the front and rear markings 36. Therefore, by aligning the cutting line, such as the ink line on the object, with the markings 36, the object can be cut along the cutting line.

[0046] When the object against which the contact surface 33 is pressed is cut by the cutting blade 18, dust is generated. The dust generated during the cutting process is collected in the dust collection shell 40 through the opening 34. In other words, the dust collection shell 40 collects the dust generated during the cutting of the object through the opening 34 provided in the base 30, preventing or reducing its dispersion to the surrounding area.

[0047] The dust collection housing 40 is formed of a transparent or translucent resin (e.g., polycarbonate). This allows for visual confirmation of the presence or amount of dust within the dust collection housing 40. Furthermore, when a pair of buttons 41 located on both sides of the dust collection housing 40 are pressed towards each other, the dust collection housing 40 is released from its attachment to the outer casing 10. This allows the dust collection housing 40 to be detached from the outer casing 10 as needed, disposing of the dust stored within it.

[0048] like Figure 1 , Figure 2 As shown, the outer casing 10 is provided with a first support portion 50 and a second support portion 60. The first support portion 50 and the second support portion 60 are located at different positions on the outer casing 10. Specifically, the first support portion 50 is located in the motor receiving portion 11, and the second support portion 60 is located in the base support portion 12. More specifically, the first support portion 50 is located on the upper surface of the rear end of the motor receiving portion 11. On the other hand, the second support portion 60 is located on the lower surface of the base support portion 12. As a result, the first support portion 50 and the second support portion 60 are separated vertically and horizontally, and also separated front to back.

[0049] like Figure 1 As shown, the base support portion 12 extends from the front to the rear above the motor housing portion 11. That is, the base support portion 12 extends upwards from the motor housing portion 11 like an eave. However, the rear end 12e of the base support portion 12 does not reach the rear end 30e of the base 30. In other words, the rear end 12e of the base support portion 12 is located further forward than the rear end 30e of the base 30.

[0050] As the base support portion 12 extends upward toward the motor receiving portion 11, a roughly U-shaped space (insertion space 70) is formed between the housing 10 and the base 30 in a side view. In other words, the motor receiving portion 11 and the base support portion 12 form a roughly U-shaped insertion space 70 in a side view between the housing 10 and the base 30. Furthermore, the upper surface of the motor receiving portion 11, which has the first support portion 50, corresponds to the lower surface (bottom surface) of the insertion space 70, and the lower surface of the base support portion 12, which has the second support portion 60, corresponds to the upper surface (top surface) of the insertion space 70.

[0051] As described above, the first support portion 50 and the second support portion 60 are located at different positions on the housing 10 and are separated from each other in the vertical and front-back directions. However, the first support portion 50 and the second support portion 60 are common in that they are located on the housing 10. Therefore, the first support portion 50 and the second support portion 60 are located between the handle 20 located on the lower side of the housing 10 and the base 30 located on the upper side of the housing 10 in the overall cutting machine 1. Similarly, the insertion space 70 is located between the handle 20 located on the lower side of the housing 10 and the base 30 located on the upper side of the housing 10 in the overall cutting machine 1. That is, the first support portion 50, the second support portion 60, and the insertion space 70 do not result in an increase in the size of the cutting machine 1 (especially an increase in the vertical direction).

[0052] Here, it is preferable that at least one of the first support portion 50 and the second support portion 60 is made of rubber. Furthermore, it is preferable that at least one of the first support portion 50 and the second support portion 60 includes an anti-slip component. In this embodiment, the first support portion 50 and the second support portion 60 are formed from rubber components that are separate from the outer casing 10. That is, in this embodiment, both the first support portion 50 and the second support portion 60 are made of rubber. Additionally, in this embodiment, both the first support portion 50 and the second support portion 60 are themselves anti-slip components. In the following description, the rubber component serving as the first support portion 50 will sometimes be referred to as "rubber component 50a," and the rubber component serving as the second support portion 60 will sometimes be referred to as "rubber component 60a."

[0053] like Figure 2 , Figure 3 As shown, rubber components 50a and 60a are fixed by being sandwiched between the first housing component 10R and the second housing component 10L.

[0054] The rubber component 50a has a block-like shape. A portion of the rubber component 50a is sandwiched between the first housing component 10R and the second housing component 10L, which are mated together. That is, a portion of the rubber component 50a is inside the housing 10 (motor housing 11), and another portion of the rubber component 50a is outside the housing 10 (motor housing 11). Furthermore, the portion of the rubber component 50a that protrudes outside the housing 10 (motor housing 11) forms the first support portion 50.

[0055] More specifically, a threaded protrusion protruding from the inner side of the second housing component 10L is inserted into a through hole formed in the rubber component 50a. Conversely, a threaded member inserted into a threaded hole formed in the first housing component 10R engages with the threaded protrusion penetrating the rubber component 50a. As a result, the first housing component 10R and the second housing component 10L are fixed to each other by the threaded member, and the rubber component 50a is sandwiched and fixed between the first housing component 10R and the second housing component 10L.

[0056] like Figure 2 , Figure 3 As shown, a portion of the rubber component 60a is housed inside the housing 10 (base support portion 12), while another portion of the rubber component 60a protrudes outside the housing 10 (base support portion 12). Furthermore, the portion of the rubber component 60a protruding outside the housing 10 (base support portion 12) forms a second support portion 60.

[0057] Furthermore, a portion (exposed portion) of the rubber component 50a forming the first support portion 50 is smaller than a portion (exposed portion) of the rubber component 60a forming the second support portion 60. Additionally, the exposed portion of the rubber component 50a forming the first support portion 50 is flat or substantially flat, while the exposed portion of the rubber component 60a forming the second support portion 60 has a textured structure with alternating recesses and protrusions (see reference). Figure 2 As a result, the frictional resistance of the surface of the first support portion 50 is smaller than that of the surface of the second support portion 60. Furthermore, the second support portion 60 is more easily crushed than the first support portion 50.

[0058] Next, refer to Figures 4-7 An example of using the cutting machine 1 will be described. Here, the cutting machine 1 is used to cut a portion of the ceiling A, forming an opening B in the ceiling A. It is also assumed that the user holds the handle 20 of the cutting machine 1 with their right hand to perform the cutting operation.

[0059] like Figure 4As shown, a portion of the ceiling A is rectangularly removed using a cutting machine 1. Specifically, while the abutment surface 33 of the base 30 is placed against the surface of the ceiling A, the cutting blade 18 is driven, and the cutting machine 1 is moved forward (in the direction of the arrow) to form a straight slit in the ceiling A. This cutting operation is repeated multiple times, resulting in four consecutive slits in the ceiling A. During this process, the dust generated during cutting is collected in the dust collection housing 40.

[0060] When the cutting process is finished, such as Figure 5 As shown, a portion of ceiling A is cut out in a rectangle, forming a rectangular opening B in ceiling A. Simultaneously, a portion of ceiling A is separated from ceiling A to obtain a rectangular plate-like body C. In the following description, the plate-like body C separated from ceiling A will be referred to as "cutting piece C".

[0061] At the end of the cutting process, the cutting disc C may fall due to its own weight. Therefore, in the final stage of the cutting process, before the four kerfs are completely connected, support the cutting disc C to prevent it from falling. For example, while continuing the cutting operation, support the cutting disc C from below with your left hand.

[0062] Then, while supporting the cutting disc C with the left hand, any part of the cutting disc C is placed on the first support part 50 of the cutting machine 1. That is, any part of the cutting disc C is blocked by the cutting machine 1. As a result, the first surface (surface) c1 of the cutting disc C abuts against the first support part 50 of the cutting machine 1.

[0063] Then, as Figure 6 As shown, while using the left hand to suppress the movement of the cutting disc C, the cutting machine 1 is moved backward (in the direction of the arrow). Thus, as... Figure 7 As shown, a portion of the cutting disc C is inserted between the first support portion 50 and the second support portion 60. In other words, a portion of the cutting disc C is inserted into the insertion space 70. At this time, the first support portion 50 slides on the surface c1 of the cutting disc C.

[0064] As will be described later, ultimately, both the first support portion 50 and the second support portion 60 come into contact with the cutting blade C. However, based on the size relationship between the first support portion 50 and the second support portion 60, the area of ​​contact between the second support portion 60 and the cutting blade C is larger than the area of ​​contact between the first support portion 50 and the cutting blade C. In other words, the area of ​​contact between the first support portion 50 and the cutting blade C is smaller than the area of ​​contact between the second support portion 60 and the cutting blade C. Moreover, compared to the uneven structure of the second support portion 60, the first support portion 50 is flat or substantially flat. As a result, the frictional resistance between the first support portion 50 and the cutting blade C is smaller than the frictional resistance between the second support portion 60 and the cutting blade C. Therefore, the first support portion 50 can slide more smoothly on the cutting blade C compared to the second support portion 60.

[0065] Then, the support of the left hand on the cutting blade C is released or eased. As a result, the surface c1 of the cutting blade C presses against the first support 50 using its own weight. Consequently, a force (torque) is generated that wants to rotate the cutting blade C around the first support 50, and the second surface (back surface) c2 of the cutting blade C, opposite to surface c1, presses against the second support 60. That is, the surface c1 of the cutting blade C abuts (presses) against the first support 50, and the back surface c2 of the cutting blade C abuts (presses) against the second support 60. As a result, the user can support one side of the cutting blade C with their right hand and the other side with their left hand via the cutting machine 1. In other words, the user can support two different parts of the cutting blade C. However, if the cutting blade C is small or light, the support of the left hand on the cutting blade C can be completely released, and the cutting blade C can be supported only by the right hand (cutting machine 1). In either case, the user can support the cutting blade C using the cutting machine 1.

[0066] Here, the second support portion 60, which presses against the back surface c2 of the cutting disc C, is more easily flattened than the first support portion 50. As a result, the second support portion 60 is significantly flattened (deformed) by the load borne by the cutting disc C, and is pressed more forcefully against the back surface c2 of the cutting disc C. That is, the surface pressure applied to the contact surface between the cutting disc C and the second support portion 60 increases.

[0067] In summary, the surface c1 of the cutting disc C is flat and presses against the first support 50, which is harder than the second support 60. On the other hand, the back surface c2 of the cutting disc C has irregularities and presses against the second support 60, which is softer than the first support 50. As a result, a portion of the cutting disc C inserted into the insertion space 70 is supported in a very stable state. Furthermore, the cutting disc C is clamped from above and below, and the first support 50 and the second support 60, which have anti-slip functions, inhibit the movement of the cutting disc C in the forward-backward and left-right directions, thus the portion of the cutting disc C is supported even more stably.

[0068] Furthermore, sometimes the user applies or adds a force (torque) to the cutting blade C to rotate it around the first support 50. For example, if the length of the cutting blade C protruding further behind the first support 50 is shorter, sometimes the weight of the cutting blade C alone is insufficient to obtain a sufficient torque. In such cases, the user may apply a force to the cutting blade C to obtain a sufficient torque.

[0069] As described above, the user supports the cutting blade C with their right hand via the cutting machine 1. At this time, the user holds the handle 20 of the cutting machine 1 with their right hand. That is, the user's right hand, which is holding the handle 20, bears the weight of the cutting machine 1 and the cutting blade C. Therefore, the angle of the handle 20 affects the load applied to the user's right hand and right arm.

[0070] From the viewpoint of reducing the load on the user's right hand and right arm, it is preferable that when the reference line X is taken as the straight line passing through the center of gravity P of the cutting machine 1 and the first support 50, the angle θ formed by the reference line X and the axis Y of the handle 20 is 60 degrees or more and 120 degrees or less.

[0071] As described above, the dust generated during the cutting operation is collected in the dust collection housing 40. Therefore, when the cutting machine 1 is lowered after the cutting operation, dust collected in the dust collection housing 40 exits from the opening 34 of the base 30. Figure 3 The problem of leakage. Therefore, the cutting machine 1 of this embodiment has a cover member 80 that forms a containment space for storing dust that leaks out from the opening 34.

[0072] like Figure 8 , Figure 9 As shown, the cover component 80 is detachable from the base 30. When the cover component 80 is installed on the base 30, it covers the opening 34 provided in the base 30. Figure 3 At least a part of ).

[0073] like Figure 10 As shown in (a) and (b), the cover component 80 includes a bottom 81, a side wall portion 82, and a movable piece 83 integrally molded from resin material, and has an overall container shape. Figure 11 As shown, the cover member 80, mounted on the base 30, forms a receiving space 84 on the base 30, communicating with the dust collection shell 40 through the opening 34. This receiving space 84 is mainly defined by the bottom 81 and sidewalls 82 of the cover member 80. The receiving space 84 formed by the cover member 80 on the base 30 has a volume capable of storing a certain amount of dust leaking from the opening 34. Therefore, even if dust stored in the dust collection shell 40 leaks from the opening 34, the dust is contained within the receiving space 84 and will not disperse to the surrounding area.

[0074] The receiving space 84 is not only for containing dust, but also for containing the protruding portion of the cutting blade 18. When the cover member 80 is installed on the base 30, the protruding portion of the cutting blade 18 is contained within the cover member 80. That is, the cover member 80 is also a cap member that covers the protruding portion of the cutting blade 18. The protruding portion of the cutting blade 18 is covered by the cover member 80, thereby preventing damage to the cutting blade 18 and eliminating the risk of injury from accidental contact with the cutting blade 18.

[0075] like Figure 10 As shown in (a) and (b), movable pieces 83 are provided on both sides of the side wall portion 82. That is, a pair of movable pieces 83 are provided on the cover component 80.

[0076] Each movable piece 83 has one fixed end connected to the side wall portion 82, and the other end of each movable piece 83 is a free end not connected to the side wall portion 82. Furthermore, a slit 85 is provided between each movable piece 83 and the side wall portion 82. When subjected to an external force, each movable piece 83 flexes (flexes inward) about its fixed end as a fulcrum towards the side wall portion 82. Further, the inwardly flexed movable piece 83 generates a force (restoring force) that desires to return to its original position (state). That is, the movable piece 83 pressed towards the side wall portion 82 desires to return to its fixed position ( Figure 10 (a) and (b) are the positions shown.

[0077] Furthermore, a slit 85 is provided in the cover component 80. Therefore, Figure 11 The accommodating space 84 shown is not a completely enclosed space. However, dust leaking from the opening 34 falls towards the bottom of the cover component 80 by its own weight. As a result, very little or no dust leaks out of the accommodating space 84 from the slit 85.

[0078] like Figure 10 As shown in (a) and (b), a contact portion 83a is provided at the free end of the movable piece 83, parallel or substantially parallel to the bottom 81. The bottom surface of the contact portion 83a and the bottom surface of the side wall portion 82 are at substantially the same height. Figure 11 As shown, when the cover component 80 is mounted on the base 30, the bottom surfaces of the contact portion 83a and the sidewall portion 82 abut against the abutment surface 33 of the base 30. More specifically, the bottom surfaces of the contact portion 83a and the sidewall portion 82 abut against a predetermined area on the abutment surface 33 surrounding the opening 34. In other words, the bottom surfaces of the contact portion 83a and the sidewall portion 82 form the mounting surface of the cover component 80 relative to the base 30. Moreover, when the cover component 80 is mounted on the base 30, the opening 34 of the base 30 is surrounded by the mounting surface of the cover component 80. In addition, four protrusions 87 are provided on the bottom surface of the sidewall portion 82. When the cover component 80 is mounted on the base 30, these protrusions 87 enter the inside of the opening 34 to prevent the cover component 80 from shifting forward, backward, left, or right.

[0079] like Figure 10 As shown in (a) and (b), the claw 86, serving as the engaging portion, is integrally formed on the end of the movable piece 83. The claw 86 protrudes from the bottom surface of the contact portion 83a in the same direction as the long side of the movable piece 83. Figure 11 As shown, the cover component 80 is fixed to the base 30 by engaging with the base 30 via the claw 86. On the other hand, when the engagement of the claw 86 with respect to the base 30 is released, the cover component 80 can be removed from the base 30. Hereinafter, the assembly and disassembly mechanism of the cover component 80 relative to the base 30 will be described in more detail.

[0080] like Figure 12As shown in (a), a first opening 34a is provided in the main body 31 of the base 30. On the other hand, as... Figure 12 As shown in (b), a second opening 34b is provided in the cover portion 32. Figure 13 As shown, when the cover portion 32 is installed on the main body portion 31, the first opening portion 34a and the second opening portion 34b are connected to form the opening portion 34. In other words, the opening portion 34 of the base 30 is composed of the first opening portion 34a provided in the main body portion 31 and the second opening portion 34b provided in the cover portion 32.

[0081] Figure 12 (b) The opening area of ​​the second opening 34b shown is smaller than Figure 12 (a) shows the opening area of ​​the first opening 34a. Specifically, the widths of the first opening 34a and the second opening 34b are substantially the same, but the total length L2 of the second opening 34b is shorter than the total length L1 of the first opening 34a. Therefore, as... Figure 13 As shown, when the first opening 34a and the second opening 34b are connected, the front and rear edges of the second opening 34b are located inside the front and rear edges of the first opening 34a.

[0082] Here, Figure 10 (a) The spacing D1 of the pair of claws 86 shown is... Figure 12 (b) The total length L2 of the second opening 34b shown is large (long). Therefore, when it is desired to insert a pair of claws 86 into the inside of the opening 34, each claw 86 abuts against the front and rear edges of the second opening 34b. When the cover member 80 is pressed against the base 30 with each claw 86 abutting against the front and rear edges of the second opening 34b, the movable piece 83 flexes inward. As a result, the distance D between the pair of claws 86 temporarily narrows, and these claws 86 are pressed into the inside of the second opening 34b. Afterward, when the pair of claws 86 are pressed into the inside of the second opening 34b (when the pair of claws 86 pass through the front and rear edges of the second opening 34b), the movable piece 83 returns to the fixed position, and the distance D1 between the pair of claws 86 widens. Thus, each claw 86 engages with the front and rear edges of the second opening 34b. As a result, Figure 11 As shown, the cover component 80 is fixed to the base 30.

[0083] In addition, when making Figure 11 When the movable piece 83 shown flexes inward, the distance D1 between the pair of claws 86 temporarily narrows, and the engagement of these claws 86 with respect to the second opening 34b is released. That is, the cover part 80 can be removed from the base 30.

[0084] like Figure 14As shown, a pair of retaining portions 90 for holding the cover component 80 removed from the base 30 are provided on the housing 10. These retaining portions 90 are provided on the side of the housing 10. More specifically, the retaining portions 90 are provided on the side of the base support portion 12.

[0085] like Figure 15 As shown, the cover member 80 is held by the holding portions 90 by embedding it between a pair of opposing holding portions 90. By holding the cover member 80, which has been removed from the base 30, in the holding portions 90, loss of the cover member 80 can be prevented.

[0086] The cover member 80 is embedded between a pair of retaining portions 90 in such a way that a movable piece 83 is sandwiched between the two retaining portions 90 and a contact portion 83a is supported on each retaining portion 90. The retaining portions 90 hold the cover member 80 in a position where it does not protrude from the abutment surface 33 of the base 30. Specifically, the retaining portion 90 is provided at a height such that when the cover member 80 is held as described above, the claw 86 of the cover member 80 is located below the abutment surface 33.

[0087] like Figure 10 As shown in (a), each movable piece 83 has a protrusion 83b on its side. Figure 16 As shown, each protrusion 83b is located inside the retaining claw 90a of the retaining portion 90 when the cover member 80 is held by the retaining portion 90. However, the distance D2 between two protrusions 83b is slightly larger than the distance D3 between two retaining claws 90a. Therefore, when the cover member 80 is inserted between a pair of retaining portions 90, the protrusions 83b abut against the retaining claws 90a, causing the retaining portions 90 to temporarily flex. That is, the cover member 80 enters between these retaining portions 90 while temporarily expanding the distance D3 between the pair of retaining portions 90. When the protrusions 83b pass through the retaining claws 90a and enter the inside of the retaining claws 90a, the retaining claws 90a return to their original position to hold the cover member 80.

[0088] like Figure 17 As shown, the cutting machine 1 is equipped with a hook 95. The hook 95 is threaded to the side of the outer casing 10 and is hung on the handrail, footboard, or other pipes of the aerial work platform. Figure 17 The hook 95 shown is hung on the pipe 96 for the pedal. When performing cutting operations on the pedal assembled from the pipe 96, the cutting machine 1 can be temporarily placed by hanging the hook 95 on the nearby pipe 96.

[0089] The installation position and angle of the hook 95 are set according to the center of gravity of the cutting machine 1, such that when the hook 95 is hung on the pipe 96, the cover component 80 mounted on the base 30 faces upward at an angle. In other words, the installation position and angle of the hook 95 are set according to the center of gravity of the cutting machine 1, with the tilt angle of the cutting machine 1 when the hook 95 is hung on the pipe 96 being the tilt angle of the cover component 80 mounted on the base 30 facing upward. As a result, when the cutting machine 1 is temporarily placed using the hook 95, the cover component 80 can be prevented from falling off, and dust leakage from the opening 34 can be suppressed.

[0090] The hook 95 can be used not only during operation of the cutting machine 1, but also during storage of the cutting machine 1. Furthermore, some illustrations of the hook 95 are omitted in certain figures for ease of understanding.

[0091] This invention is not limited to the above-described embodiments, and various modifications can be made without departing from its spirit. For example, the position of the first support is not limited to the motor housing, and the position of the second support is not limited to the base support. However, deformation and strain of the base will not affect the cutting accuracy. Therefore, from the viewpoint of preventing deformation and strain of the base, it is preferable not to apply load or stress to the base when the plate-like body is supported by the first and second support portions. In the above embodiment, both the first support portion 50 and the second support portion 60 are provided on the outer casing 10. Therefore, when the cutting disc C is supported by the first support portion 50 and the second support portion 60, no load or stress is applied to the base 30. At least when the cutting disc C is supported by the first support portion 50 and the second support portion 60, the load or stress applied to the base 30 is minimal, and there is no problem of deformation or strain of the base 30.

[0092] The method for fixing the components forming the first support portion and the second support portion is not limited to the method described above. However, in the above embodiment, the rubber component 50a and the rubber component 60a are fixed by being sandwiched between the first housing component 10R and the second housing component 10L. Therefore, apart from the fixing component for fixing the first housing component 10R and the second housing component 10L, it is not necessary to prepare a fixing component for fixing the rubber component 50a and the rubber component 60a.

[0093] The rubber components (anti-slip components) forming the first and second support portions can also be integrated (one-piece molded) with the outer shell. For example, in another embodiment, the first and second support portions are formed from a portion of an elastic component covering the surface of the outer shell (e.g., the grip portion surface of the handle 20). Furthermore, in another embodiment, an anti-slip component separate from the component forming the first and second support portions is provided in the first and second support portions. Additionally, the rubber components forming the first and second support portions can be replaced with other components with a high coefficient of friction.

Claims

1. A cutting machine, characterized in that, have: A housing having a motor housing section for accommodating the motor; A cutting blade driven by the aforementioned motor; The first support portion is provided in the aforementioned outer casing; A second support portion disposed on the aforementioned outer casing and separated from the aforementioned first support portion; A handle located on the lower side of the aforementioned motor housing; and The base located on the upper side of the aforementioned motor housing, The aforementioned outer casing includes a base support portion that supports the aforementioned base. The first support portion and the second support portion are disposed vertically between the handle and the base. When the long side of the aforementioned base is taken as the front-back direction, The aforementioned first support portion is positioned further rearward than the rear end of the aforementioned base. The second support portion is disposed on the base support portion extending along the length direction of the base above the motor housing portion, and is positioned forward of the rear end of the base. By having the first surface of the plate abut against the first support portion and the second surface of the plate, which is opposite to the first surface, abut against the second support portion, the plate can be supported.

2. The cutting machine according to claim 1, characterized in that, When the first surface of the plate-shaped body inserted between the first support portion and the second support portion is pressed against the first support portion, the second surface of the plate-shaped body is pressed against the second support portion by a force that rotates the plate-shaped body with the first support portion as a fulcrum.

3. The cutting machine according to claim 1, characterized in that, At least one of the aforementioned first support portion and the aforementioned second support portion is made of rubber.

4. The cutting machine according to claim 1, characterized in that, At least one of the first support portion and the second support portion includes an anti-slip component that abuts against the plate-like body.

5. The cutting machine according to claim 4, characterized in that, The aforementioned outer shell is composed of a first outer shell component and a second outer shell component that are mated together. At least one of the first support portion and the second support portion is fixed by being sandwiched between the first housing component and the second housing component.

6. The cutting machine according to claim 1, characterized in that, The aforementioned outer shell is composed of a first outer shell component and a second outer shell component that are mated together. The second support portion is an anti-slip component that abuts against the plate-like body and is fixed to the outer shell by being sandwiched between the first outer shell component and the second outer shell component.

7. The cutting machine according to claim 1, characterized in that, The aforementioned first support portion and the aforementioned second support portion are anti-slip components that abut against the aforementioned plate-shaped body. The frictional resistance of the first support part is smaller than that of the second support part.

8. The cutting machine according to claim 6, characterized in that, The aforementioned first support portion is located in the aforementioned motor housing portion.

9. The cutting machine according to claim 7, characterized in that, The angle formed by the straight line passing through the center of gravity of the cutting machine and the first support and the axis of the handle is more than 60 degrees and less than 120 degrees.

10. The cutting machine according to claim 4, characterized in that, Compared to the area of ​​the first support portion abutting against the plate-like body, the area of ​​the second support portion abutting against the plate-like body is larger.

11. The cutting machine according to claim 4, characterized in that, The second support portion has an uneven structure that deforms when pressed against the plate-like body.

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