CN113927093A

CN113927093A - Cutting processing machine

Info

Publication number: CN113927093A
Application number: CN202010608042.9A
Authority: CN
Inventors: 堀江德至; 寺西卓也; 杨军昌
Original assignee: Hitachi Koki Co Ltd
Current assignee: Koki Holdings Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-01-14

Abstract

The invention provides a cutting machine which can inhibit a contact component from interfering operation. The cutting machine is provided with a motor, a cutting saw blade (43) which is operated by the motor for cutting a processing material (39), a housing which supports the motor and the cutting saw blade (43) and moves relative to the processing material (39) in a first direction (B1) for cutting the processing material (39), and a cover (17) which contacts the processing material (39) when the housing moves relative to the processing material (39), wherein the position of the cover (17) in a second direction (B2) intersecting the first direction (B1) can be changed relative to the housing, and the amount of protrusion of the cover (17) relative to the housing in the second direction (B2) is changed when the position of the cover (17) in the second direction (B2) is changed relative to the housing.

Description

Cutting processing machine

Technical Field

The present invention relates to a cutting machine including an operating portion operated by a motor, a housing supporting the motor and the operating portion, and a contact member contacting a workpiece.

Background

Patent document 1 describes a cutting tool as an example of a cutting machine including an operating portion operated by a motor, a housing supporting the motor and the operating portion, and a contact member contacting a workpiece. The cutting tool described in patent document 1 includes a motor having a motor shaft, a housing accommodating the motor, a speed reduction portion provided in the motor shaft, an output shaft connected to the speed reduction portion, an eccentric cam connected to the output shaft, a gear housing mounted on the housing and accommodating the eccentric cam, a swing arm connected to the eccentric cam, a saw blade as an operation portion mounted on the swing arm, and a guide table as a contact member mounted on the gear housing. The guide platform is in contact with the work material, and the saw blade swings to cut the work material.

Documents of the prior art

Patent document 1: micro-membrane of Japanese patent application No. 59-90117 (Japanese unexamined patent application No. 61-5590)

The present inventors have found that, if there is an object extending in a direction intersecting the surface of the workpiece, the edge of the contact member comes into contact with the object, and it is difficult to cut a portion of the workpiece close to the object.

Disclosure of Invention

The invention aims to provide a cutting machine which can prevent a contact component from interfering operation.

A cutting machine according to one embodiment includes a motor, an operating portion that is operated by the motor to cut a workpiece, a housing that supports the motor and the operating portion and moves in a first direction with respect to the workpiece to cut the workpiece, and a contact member that contacts the workpiece when the housing moves with respect to the workpiece, wherein the contact member is capable of changing a position in a second direction intersecting the first direction with respect to the housing, and wherein a protruding amount in the second direction is changed with respect to the housing when the contact member changes the position in the second direction with respect to the housing.

The effects of the present invention are as follows.

According to the cutting and processing machine of the embodiment, the contact member is moved in the second direction with respect to the housing, and the protruding amount of the contact member in the second direction with respect to the housing is changed. Therefore, the contact member can be prevented from interfering with the work, and workability in cutting the workpiece can be improved.

Drawings

Fig. 1 is an external view of a cutting and processing machine according to an embodiment of the present invention.

Fig. 2 is a sectional view of the cutting and processing machine shown in fig. 1.

Fig. 3 is a perspective view of the cutting and processing machine shown in fig. 1.

Fig. 4 is a plan view of a state in which the cover is mounted with respect to the base in the basic position.

Figure 5 is a longitudinal cross-sectional view of the cover and base of figure 4 taken along line V-V.

Fig. 6 is a bottom view of the cover corresponding to fig. 4.

Fig. 7(a) is a plan view of the cutting machine relative to the base attachment cover in the first adjustment position, (B) is a plan view of the cutting machine relative to the base attachment cover in the basic position, and (C) is a plan view of the cutting machine relative to the base attachment cover in the second adjustment position.

Fig. 8 is a plan view of a state in which the cover is mounted with respect to the base in the first adjustment position.

Figure 9 is a longitudinal cross-sectional view of the cover and base taken along line IX-IX of figure 8.

Fig. 10 is a bottom view of the cover corresponding to fig. 8.

Fig. 11 is a plan view of a state in which the cover is attached to the base in the second adjustment position.

Fig. 12 is a longitudinal cross-sectional view of the cap and base portion taken along line XII-XII of fig. 11.

Fig. 13 is a bottom view of the cover corresponding to fig. 11.

Fig. 14 is a perspective view of the interior of the dust collecting device shown in fig. 3.

In the figure: 10-cutting processing machine, 11-shell, 12-electric motor, 13-motion conversion mechanism, 14-action part, 16-base, 17-cover, 19-motor containing part, 20-handle, 34-detachable part, 38-contact part, 40, 41, 42-through hole, 43-cutting saw blade, 44-dust collecting device, A1-center line, B1-first direction, B2-second direction, L3, L4-projection amount, L7, L8-distance.

Detailed Description

Hereinafter, several embodiments of the cutting and processing machine according to the present invention will be described with reference to the drawings.

[ integral mechanism of cutting machine ]

The cutting machine 10 shown in fig. 1, 2, and 3 includes a housing 11, an electric motor 12, a motion conversion mechanism 13, an operation unit 14, a control circuit 15, a base 16, and a cover 17. At least a part of the housing 11 is made of synthetic resin, and the housing 11 includes a main body portion 18, a motor housing portion 19, and a handle 20. The motor housing 19 and the handle 20 are connected to the main body 18.

The electric motor 12 is disposed inside the motor housing 19. The electric motor 12 is, for example, a three-phase dc brushless motor. The electric motor 12 includes a housing 21, a stator 22, a rotor 23, and a rotary shaft 24. The housing 21 is fixed to the motor housing 19. The stator 22 and the rotor 23 are provided in the housing 21, and the stator 22 is not rotatable. The stator 22 has coils of wires corresponding to three phases, i.e., U-phase, V-phase, and W-phase. A not-shown conversion circuit is provided in the case 21. The conversion circuit has a plurality of switching elements that can be individually turned on and off. The switching circuit connects and disconnects the circuit between the stator 22 and the power source. The rotor 23 is rotatable in the housing 21, and the rotor 23 is mounted on a rotary shaft 24. The rotation shaft 24 and the rotor 23 can rotate about the center line a 1.

The motion conversion mechanism 13 is a mechanism that converts the rotational force of the rotary shaft 24 into the actuating force of the actuating portion 14. The motion conversion mechanism 13 includes a small-diameter conical gear 25, a large-diameter conical gear 26, and a link 75. A small-diameter conical gear 25 is provided on the rotary shaft 24. The large-diameter conical gear 26 is rotatably provided in the main body 18. The small-diameter conical gear 25 meshes with the large-diameter conical gear 26. A cam, not shown, is provided at a position eccentric from the rotation center of the large-diameter bevel gear 26. The link 75 has a guide hole 28, and the cam is disposed in the guide hole 28. When the large diameter conical gear 26 rotates, the cam moves about the rotation center of the large diameter conical gear 26, and the link 75 moves in a plane including the center line a1 and perpendicular to the rotation center line of the large diameter conical gear 26.

The operating unit 14 includes a support rod 27 connected to the link 75, and a cutting blade 43 attached to the support rod 27. The cutting blade 43 is made of, for example, metal, and the cutting blade 43 is attachable to and detachable from the support rod 27. The operation unit 14 can reciprocate in an elliptical orbit in a two-dimensional plane as shown in fig. 2.

The handle 20 is a position to be held by the hand of the operator. The handle 20 is connected with respect to the main body portion 18 by a support shaft 31. The handle 20 is movable within a predetermined angular range with respect to the body portion 18 about the support shaft 31 as a fulcrum. A wrench 32 and a wrench switch 33 are provided on the handle 20. The operator holds the handle 20 with a hand and applies and releases the operating force to and from the wrench 32. The handle 20 is provided with a detachable portion 34 at a position opposite to the position connected to the main body portion 18. The attaching and detaching portion 34 has a first terminal. The first terminal is connected to the conversion circuit.

The battery pack 35 is attached to and detached from the attaching and detaching portion 34. The battery pack 35 is a power source that applies voltage to the electric motor 12. The battery pack 35 is configured to accommodate battery cells in the accommodation case 76. The battery unit is a dc power supply. The battery cell is a rechargeable battery that can be charged and discharged, and any one of a lithium ion battery, a nickel hydrogen battery, a lithium ion polymer battery, and a nickel cadmium battery can be used as the battery cell. The housing case 76 has a second terminal, and when the battery pack 35 is attached to the detachable portion 34, the second terminal is electrically connected to the first terminal.

The control circuit 15 is provided inside the handle 20. The control circuit 15 is a microcomputer having an input interface, an output interface, a central processing unit, and a storage circuit. The control circuit 15 controls the rotation and stop of the electric motor 12 by controlling the switching circuit based on the signal of the spanner switch 33.

The base 16 is made of metal or synthetic resin. The base 16 is fixed to the body 18 by a screw member. The base 16 has a plate-like shape, and the base 16 has a through hole 36. The through hole 36 penetrates the base portion 16 in the thickness direction. The through hole 36 penetrates the base portion 16 in a direction intersecting the center line a1, i.e., in the vertical direction in fig. 2. As shown in fig. 4, a part of the cutting blade 43 is disposed on the through hole 36, and the cutting blade 43 can move in the thickness direction of the base portion 16 in the through hole 36.

The cover 17 is made of metal or synthetic resin. At least a portion of the cover 17 is elastically deformable. The cover 17 can be attached to and detached from the base 16. The cover 17 has a plate-like shape, and the cover 17 has

contact portions

37 and 38 as shown in fig. 5. The

contact portions

37 and 38 are provided at mutually opposite positions in the thickness direction of the cover 17. When the cover 17 is attached to the base 16, the contact portion 37 contacts the base 16. The contact portion 38 is a flat surface and contacts the surface of the work 39.

As shown in fig. 6, the cover 17 has a plurality of through

holes

40, 41, and 42. The plurality of through

holes

40, 41, and 42 penetrate the cover 17 in the thickness direction, that is, in the thickness direction in fig. 1 and 2. The cover 17 is provided with a plurality of through

holes

40, 41, and 42, which will be described later. In a state where the cover 17 is attached to the base 16, a part of the cutting blade 43 is disposed in any one of the through-hole 30 and the through-

holes

40, 41, and 42 of the cover 17, and the cutting blade 43 protrudes from the contact portion 38.

The cutting machine 10 shown in fig. 1 and 2 is capable of attaching and detaching the dust collecting device 44 to and from the main body 18 and the base 16. The dust collecting device 44 is a synthetic resin container or housing. The dust collecting device 44 has a recovery chamber 45 and an opening 46 connected to the recovery chamber 45. The dust collecting device 44 can collect the processing chips generated by cutting the processing material 39 after the processing chips pass through the through hole 36.

When the dust collecting device 44 is attached to the main body 18 and the base 16 as shown in fig. 3, the opening 46 is connected to the through hole 36 through any one of the through

holes

40, 41, and 42. As shown in fig. 14, the through hole 36 is connected to the recovery chamber 45. A portion of the cutting blade 43 and a portion of the support bar 27 are located in the recovery chamber 45.

[ example of use of cutting machine ]

The cutting machine 10 is used, for example, as follows. Here, an example will be given in which the operator cuts the ceiling as the workpiece 39 using the cutting machine 10. The operator holds the handle 20 with the hand. When the wrench switch 33 is turned off, the control circuit 15 stops the electric motor 12 without applying a voltage to the electric motor 12. That is, the cutting blade 43 stops.

When the operator applies an operating force to the wrench 32 and turns on the wrench switch 33, the control circuit 15 controls the switching circuit to apply a voltage to the electric motor 12. The rotational force of the rotary shaft 24 of the electric motor 12 is converted into the reciprocating force of the action portion 14 by the motion conversion mechanism 13.

The operator brings the contact portion 38 of the cover 17 into contact with the surface of the workpiece 39 and moves the cutting machine 10 in the first direction B1 below the workpiece 39. The lower side of the workpiece 39 is the lower side of the workpiece 39 in the vertical direction, i.e., the direction of action of gravity. The first direction B1 is a direction along the surface of the work material 39 and a direction along the center line a 1. The operator keeps the contact portion 38 in contact with the surface of the workpiece 39 while moving the cutting machine 10. That is, the housing 11 is positioned in a direction intersecting with respect to the surface of the work material 39. The operator moves the cutting machine 10 in the first direction B1 with respect to the workpiece 39, and cuts the workpiece 39 by operating the cutting blade 32. The cut powder passes through the through hole 36 and the opening 46 by its own weight and is collected in the collection chamber 45 of the dust collecting device 44.

However, if there is an object extending in a direction intersecting the surface of the workpiece 39, for example, if there is a wall 47, there is a possibility that the end of the cover 17 may contact the wall 47. Here, the end of the cover 17 is an end close to the wall 47 in the second direction B2 intersecting the first direction B1 which is the moving direction of the cutter 10. If the end of the cover 17, i.e., the long edge 61, contacts the wall 47, the housing 11 supporting the cutting blade 43 cannot be brought too close to the wall 47. Therefore, if the target portion to be cut in the workpiece 39 is located extremely close to the wall 47, it becomes difficult to cut the target portion of the workpiece 39, and workability may be reduced.

The cutting machine 10 of the present embodiment changes the distance between the end of the cover 17 and the housing 11 in the second direction B2 so that the housing 11 can be brought as close to the wall 47 as possible. This function is achieved by moving the cover 17 in the second direction B2 relative to the base 16.

[ Structure for changing the position of the cover ]

First, the structure of the base 16 will be described. The base 16 is substantially quadrangular, such as rectangular, in plan view as shown in fig. 4. The base 16 has two

long edges

48, 49 and two

short edges

50, 51. The two

long edges

48, 49 are arranged along the first direction B1 and at an interval of the second direction B2. The two

short edges

50, 51 are arranged in a second direction B2. The two

short edges

50 and 51 may be linear or not linear, and may be parallel to the second direction B2. That is, the two

short edges

50, 51 may have a convex portion or a concave portion in a direction intersecting the second direction B2. The respective dimensions of the

long edges

48, 49 in the first direction B1 are greater than the respective dimensions of the end edges 50, 51 in the second direction B2. The base portion 16 has a flat surface 52, and when the cover 17 is attached to the base portion 16, the flat surface 52 comes into contact with the contact portion 37. The flat surface 52 has 4

recesses

53, 54, 55, 56. The 4 recesses 53, 54, 55, 56 are grooves or depressions. The 4 recesses 53, 54, 55, 56 extend in the direction along the

long edges

48, 49, respectively, and the

recesses

53, 54, 55, 56 are provided at intervals from each other in the second direction B2. Two

recesses

54, 55 are provided between the recess 55 and the recess 56. Further, the through-hole 36 is provided between the recess 54 and the recess 55 in the second direction B2. Further, a center line C1 passing through the center of the base 16 in the second direction B2 is located at the center of the through hole 36 in the second direction B2.

Of the two

short edges

50 and 51, the short edge 51 adjacent to the through hole 36 in the first direction B1 is provided with two

notches

57 and 58. The two

cutouts

57, 58 are provided at intervals in the second direction B2. Furthermore, two cut-

outs

59, 60 are provided on the short edge 50. The two

cutouts

59 and 60 are provided at intervals in the second direction B2. The four

cutouts

57, 58, 59, and 60 are disposed at different positions in the second direction B2, respectively. The two

cutouts

59, 60 are disposed between the two

cutouts

57, 58 in the second direction B2.

As shown in fig. 4 and 6, the planar shape of the cover 17 is substantially quadrangular, for example, rectangular. The cover 17 has two

long edges

61, 62 and two

short edges

63, 64. The two

long edges

61, 62 are arranged along the first direction B1 and at intervals in the second direction B2. The two

long edges

61 and 62 may or may not be linear and parallel to the first direction B1. That is, the two

long edges

61 and 62 may have a concave portion and a convex portion in a direction intersecting with the first direction B1. The two

short edges

63, 64 are arranged in a second direction B2. The two

short edges

63 and 64 may be linear or not linear, and may be parallel to the second direction B2. That is, the two

short edges

63, 64 may have a concave portion and a convex portion in a direction intersecting with respect to the second direction B2. The respective dimensions of the

long edges

61, 62 in the first direction B1 are larger than the respective dimensions of the end edges 63, 64 in the second direction B2. In addition, as shown in fig. 7(B), in the second direction B2, the dimension L5 of the handle 20 is smaller than the dimension L6 of the

short edges

63, 64 of the hood 17.

Further, a center line C2 passing through the center of the cover 17 in the second direction B2 is positioned at the center of the through hole 40 in the second direction B2. In the second direction B2, the distance L0 from the long edge 61 to the center line C2, and the distance L0 from the long edge 62 to the center line C2 are equal. The two through

holes

41 and 42 are provided with a center line C2 therebetween in the second direction. That is, the through

holes

41 and 42 are provided apart from each other. The cover 17 is provided with a through hole 40 and two through

holes

41 and 42 at the center in the direction along the

long edges

61 and 62.

Four

ribs

65, 66, 67, 68 project from the contact portion 37. The four

ribs

65, 66, 67, 68 extend in the direction along the

long edges

61, 62, respectively, and the

ribs

65, 66, 67, 68 are provided at intervals in the second direction B2. Two

ribs

66, 67 are provided between the rib 65 and the rib 68.

Of the two

short edges

63, 64, the short edge 63 near the two through

holes

41, 42 in the first direction B1 is provided with a catching portion 69. The catching portion 69 includes a plurality of projections 70. Two temporary fixing projections 74 are provided on the grasping portion 69. A wall 71 is provided on the short edge 64, and two temporary fixing projections 72 are provided on the wall 71. A plurality of, for example, four engaging portions 73 are provided on the short edge 64. The four engaging portions 73 are provided at intervals in the second direction B2.

[ description of the position of the cover ]

The cutting machine 10 is capable of changing the position of the cover 17 relative to the base 16 in the second direction B2 in the basic position, the first adjusted position, and the second adjusted position.

(basic position)

Fig. 4, 5, 6, and 7(B) show a state in which the cover 17 is mounted in a basic position with respect to the base 16 in the second direction B2. If the cover 17 is mounted in the basic position with respect to the base 16, as shown in fig. 4, the center line C1 is located at the same position as the center line C2 in the second direction B2.

As shown in fig. 5, the rib 66 is located in the recess 53 and the rib 67 is located in the recess 56. By the

ribs

66, 67 engaging with the base 16, the cover 17 is positioned relative to the base 16 in the second direction B2. As shown in fig. 4, when the short edge 50 contacts the grasping portion 69 and the short edge 51 contacts the wall 71 and the engaging portion 73, the cover 17 is positioned in the direction along the center lines C1 and C2 with respect to the base 16. Then, the cover 17 is attached to the base 16 by the engagement of the engagement portion 73 with the base 16 and the engagement of the protrusion 70 with the base 16. A portion of the cutting blade 43 is positioned within the through hole 40.

As shown in fig. 5, when the target site D1 of the workpiece 39 is cut by bringing the contact portion 38 of the cover 17 into contact with the workpiece 39, either the long edge 61 or the long edge 62 is close to the wall 47 in the second direction B2. Fig. 5 shows the case where the long edge 61 is closer to the wall 47 than the long edge 62 for convenience. In the second direction B2, when the distance between the target site D1 and the wall 47 is equal to or greater than the distance L0, the operator uses the cutting machine 10 in a state where the cover 17 is attached to the base 16 in the basic position.

When the cover 17 is attached to the base 16 in the basic position in the second direction B2, as shown in fig. 7(B), the long edge 61 as the end of the cover 17 in the second direction B2 protrudes from the outer surface of the motor housing 19 by a protrusion amount L3. In the second direction B2, the long edge 62 as the end of the cover 17 protrudes from the outer surface of the motor housing 19 by a protrusion amount L3. The two projection amounts L3 are equal. Further, in the second direction B2, a distance L7 from the cutting blade 43 to the long edge 61 and a distance L7 from the cutting blade 43 to the long edge 62 are equal.

(first adjustment position)

Fig. 8, 9, 10, and 7(a) show a state in which the cover 17 is attached to the base 16 at the first adjustment position in the second direction B2. If the cover 17 is mounted with respect to the base 16 in the first adjusted position, the center line C1 is positioned away from the center line C2 in the second direction B2, as shown in fig. 8. In the first adjustment position, the position of the base portion 16 relative to the cover 17 is relatively moved in one direction of the second direction B2, compared with the case of the basic position. The second direction B2 is the left-right direction in fig. 8.

As shown in fig. 9, the rib 68 is located in the recess 53, and the rib 67 is located in the recess 54. By the engagement of the

ribs

67 and 68 with the base 16, the cover 17 is positioned with respect to the base 16 in the second direction B2. As shown in fig. 8, the short edge 51 contacts the grasping portion 69, and the short edge 50 contacts the wall 71 and the engaging portion 73, whereby the cover 17 is positioned with respect to the base portion 16 in the direction along the center lines C1 and C2. The cover 17 is attached to the base 16 by the engagement portion 73 engaging with the base 16 and the protrusion 70 engaging with the base 16. A part of the cutting blade 43 is positioned in the through hole 42.

Fig. 9 shows the case where the long edge 61 is closer to the wall 47 than the long edge 62 in the second direction B2. In the second direction B2, when the distance L2 between the target site D1 and the wall 47 is smaller than the distance L0, the operator uses the cutting machine 10 in a state where the cover 17 is attached to the base 16 at the first adjustment position.

When the cover 17 is attached to the base 16 at the first adjustment position in the second direction B2, as shown in fig. 7(a), the long edge 62 as the end of the cover 17 protrudes from the motor housing 19 by a protruding amount L4. The projection amount L4 is smaller than the projection amount L3. Also, in the second direction B2, the distance L8 from the cutting blade 43 to the long edge 61 is smaller than the distance L7 shown in fig. 7 (B).

(second adjustment position)

Fig. 11, 12, 13, and 7(C) show a state in which the cover 17 is attached to the base 16 at the second adjustment position in the second direction B2. When the cover 17 is mounted with respect to the base 16 in the second adjustment position, the center line C1 is positioned apart from the center line C2 in the second direction B2, as shown in fig. 11. The direction in which the cover 17 moves from the basic position to the second adjustment position is opposite to the direction in which the cover 17 moves from the basic position to the first adjustment position.

As shown in fig. 12, the rib 65 is located in the recess 56, and the rib 66 is located in the recess 55. The

ribs

65 and 66 engage with the base 16, thereby positioning the cover 17 relative to the base 16 in the second direction B2. As shown in fig. 11, the short edge 51 contacts the grasping portion 69, and the short edge 50 contacts the wall 71 and the engaging portion 73, whereby the cover 17 is positioned relative to the base portion 16 in the direction along the center lines C1 and C2. The cover 17 is attached to the base 16 by the engagement portion 73 engaging with the base 16 and the protrusion 70 engaging with the base 16. A part of the cutting blade 43 is positioned in the through hole 41.

Fig. 12 shows the case where the long edge 62 is closer to the wall 47 than the long edge 61 in the second direction B2. In the second direction B2, when the distance L2 between the target site D1 and the wall 47 is smaller than the distance L0, the operator uses the cutting machine 10 with the cover 17 attached to the base 16 at the first adjustment position.

[ description of detachment of the cover from the base and description of detachment of the cover from the base ]

When the cover 17 is attached to the base 16, the two engaging portions 73 are engaged with the base 16 and the protrusion 70 is engaged with the base 16. When the operator removes the cover 17 from the base 16, the operator grasps the grasping portion 69 with the fingers and elastically deforms the cover 17 in a direction to separate the cover 17 from the base 16 using the two engaging portions 73 as fulcrums, whereby the protrusion 70 is released from the base 16. When the two engaging portions 73 are released from the base portion 16, the cover 17 is detached from the base portion.

When the worker attaches the cover 17 to the base 16, the worker engages either the temporary fixing projection 72 or the temporary fixing projection 74 with at least one of the

recesses

57 and 58 to position the cover 17 and the base 16 in the second direction B2. Further, wall 71 is pushed toward either short edge 50 or short edge 51. Then, when the cover 17 is brought close to the base 16 with the two engaging portions 73 engaged with the base 16 and the two engaging portions 73 as fulcrums, the cover 17 is elastically deformed, and the protrusion 70 passes over the base 16. When the contact portion 37 of the cover 17 contacts the base 16, the cover 17 stops. The projection 70 is engaged with the base 16, and the cover 17 is attached to the base 16.

In addition, in the case where the cover 17 is mounted with respect to the base 16 in the basic position, and in the case where the cover 17 is mounted with respect to the base 16 in the first adjustment position or the second adjustment position, there is a difference of 180 degrees in the direction in which the cover 17 is mounted on the base 16. Specifically explaining, as shown in fig. 4, in the case where the cover 17 is mounted in the basic position with respect to the base 16, the grasping portion 69 comes into contact with the short edge 50 of the base 16. In contrast, as shown in fig. 8 or 11, when the cover 17 is attached to the base 16 at the first adjustment position or the second adjustment position, the grasping portion 69 contacts the short edge 51 of the base 16.

Therefore, when the position where the cover 17 is attached to the base 16 is changed between the basic position and the first adjustment position, or when the basic position and the second adjustment position are changed, the operator rotates the cover 17 by 180 degrees with respect to the base 16. When the position at which the cover 17 is attached to the base 16 is changed between the first adjustment position and the second adjustment position, the cover 17 is detached from the base 16, and the cover 17 is moved relative to the base 16 by a predetermined amount in the second direction B2.

As shown in fig. 8, if the cover 17 is mounted in the second adjustment position with respect to the base 16 in the second direction B2, as shown in fig. 7(C), the long edge 61 as an end of the cover 17 protrudes from the motor housing 19 toward therebetween by a protrusion amount L4 in the second direction B2. The projection amount L4 is smaller than the projection amount L3. Also, in the second direction B2, the distance L8 from the cutting blade 43 to the long edge 62 is smaller than the distance L7 shown in fig. 7 (B).

[ Effect of the embodiment ]

The operator can change the position of mounting the cover 17 on the base 16 in the second direction B2 according to the distance between the target site D1 and the wall 47 in the second direction B2. When the position where the cover 17 is attached to the base 16 is changed in the second direction B2, the amounts L3 and L4 of protrusion of the cover 17 from the motor housing 19 of the housing 11 can be changed. Therefore, the cover 17 can be prevented from interfering with the work, and the workability of cutting the workpiece 39 can be suppressed from being lowered. Specifically, the edges of work material 39 near wall 47 may be cut.

Further, the

ribs

65, 66, 67, and 68 engage with the base 16, thereby positioning the cover 17 with respect to the base 16 in the second direction B2. Therefore, the cover 17 can be accurately positioned with respect to the base 16. Further, when the cover 17 is attached to the base 16 at the basic position, or when the cover 17 is attached to the base 16 at the first adjustment position or the second adjustment position, the base 16 can be separated from the base 16 at a different position where the engaging portion 73 engages. Therefore, the structure of the base portion 16 can be suppressed from being locally complicated, and an increase in the manufacturing cost of the base portion 16 can be suppressed.

Further, the through hole in which a part of the cutting blade 43 is located differs between the case where the cover 17 is attached to the base 16 at the basic position and the case where the cover 17 is attached to the base 16 at the first adjustment position or the second adjustment position. Specifically, the cover 17 is rotated by 180 degrees in the first and second adjustment positions as compared with the state of the base position, and the concentration or the concentration of the through holes at one position can be suppressed. Therefore, the opening areas of the through

holes

40, 41, and 42 can be prevented from being enlarged more than necessary, and the durability of the contact portion 38 can be prevented from being reduced. Further, since the through-holes are formed so as to have an appropriate area at each mounting position, the dust collecting performance can be prevented from being lowered.

In addition, even in any of the case where the cover 17 is mounted in the basic position with respect to the base 16, and the case where the cover 17 is mounted in the first adjustment position or the second adjustment position with respect to the base 16, the through hole in which a part of the cutting blade 43 is located within the opening area of the opening portion 46. Therefore, the processed piece generated by cutting the processing material 39 passes through any one of the through

holes

40, 41, and 42 where a part of the dicing blade 43 is located and the opening 46, and falls into the collection chamber 45. Therefore, the dust collecting device 44 can reliably collect the machining chips.

[ supplementary notes ]

An example of technical meanings of matters disclosed in the embodiments is as follows. The cutting machine 10 is an example of a cutting machine. The electric motor 12 is an example of a motor and an example of an electric motor. The operation unit 14 is an example of an operation unit. The cutting blade 43 is an example of a cutting blade. The housing 11 is an example of a housing. The cover 17 is an example of a contact member. The base 16 is an example of a base. The contact portion 38 is an example of a contact surface. The through holes 40, 41, and 42 are examples of through holes. The through hole 40 is an example of the first hole. The through holes 41 and 42 are examples of the second hole. The dust collecting device 44 is an example of a dust collecting device. The motor housing section 19 is an example of a motor housing section. The motion conversion mechanism 13 is an example of a motion conversion mechanism. The handle 20 is an example of a handle. The attaching and detaching portion 34 is an example of an attaching and detaching portion.

The center line a1 is an example of a center line. The projection amounts L3 and L4 are examples of the projection amount in the second direction. The distances L7 and L8 are examples of the "distance from the end of the contact member to the cutting blade". The first direction B1 is an example of the first direction. Also, the direction along the first direction B1 may also be defined as the front-rear direction. The second direction B2 is an example of the second direction. The second direction B2 may be defined as a left-right direction or a width direction. The base position, the first adjustment position, and the second adjustment position are examples of the position of the contact member in the second direction. The base position is an example of the first position. The first adjustment position and the second adjustment position are examples of the second position.

The cutting machine is not limited to the embodiment described with reference to the drawings, and various modifications can be made without departing from the spirit thereof. For example, the cutting and processing machine may not have a dust collecting device. In the embodiment, the position of the base attachment cover may be changed stepwise, but the position of the base attachment cover may be changed without a step. Further, even in the case of changing the position of mounting the cover with respect to the base, the cover can be moved in the second direction with respect to the base without rotating the cover with respect to the base. The base may be provided by a member different from the housing, or the base may be provided integrally with the housing. The operating portion includes a support portion for supporting the cutting blade in addition to the cutting blade for cutting the workpiece. The motion conversion mechanism is constituted by at least one of a cam mechanism, a link mechanism, a crank mechanism, and the like.

Further, the processing material may be a floor or a wall plate other than the ceiling. In the case of cutting the floor with the cutting blade, the contact portion of the contact member is in contact with the floor, and the position of the contact member can be changed according to the distance between the end of the contact member and the wall plate. In the case of cutting the wall plate with the cutting blade, the contact portion of the contact member is brought into contact with the wall plate as a cutting object. The position of the contact member may be changed according to the distance between the end of the contact member and another wall plate, the distance between the end of the contact member and the ceiling, or the distance between the end of the contact member and the floor.

The term "center" described in the embodiments may be either a complete center or a substantially center. The term "center" described in the embodiments may be either a complete center or an approximate center. That is, the terms "center" and "center" include machining errors, assembly errors, and dimensional tolerances of components or elements.

The following cutting and processing machine is also disclosed in the embodiment. For example, the cutting machine includes a motor, an operating portion operated by the motor to cut a workpiece, a housing supporting the motor and the operating portion and moving in a first direction with respect to the workpiece to cut the workpiece, a contact member contacting the workpiece when the housing moves with respect to the workpiece, and an adjusting mechanism capable of changing a protruding amount of the contact member with respect to the housing in a second direction intersecting the first direction. In addition, the adjustment mechanism changes the protruding amount of the contact member with respect to the housing by changing the position of the contact member in the second direction. The

ribs

65, 66, 67, and 68 and the

recesses

53, 54, 55, and 56 disclosed in the embodiments are examples of the adjustment mechanism.

Claims

1. A cutting and processing machine is provided with:

a motor;

an operating part operated by the motor for cutting the processed material;

a housing supporting the motor and the operating unit and moving in a first direction with respect to the workpiece to cut the workpiece; and

a contact member that contacts the workpiece when the housing moves relative to the workpiece,

the cutting and processing machine is characterized in that,

the contact member is capable of changing a position in a second direction intersecting the first direction with respect to the housing,

when the position of the contact member in the second direction is changed with respect to the housing, the amount of protrusion in the second direction is changed with respect to the housing.

2. The cutter-processor of claim 1,

the operating part includes a cutting blade for cutting the workpiece,

the contact member is configured to be changeable in position in the second direction between a first position at which the cutting blade is located at the center of the contact member in the second direction and a second position at which the cutting blade is located at a position different from the first position in the second direction.

3. The cutter-processor of claim 2,

the base portion is fixed to the housing and supports the contact member so that a position of the contact member with respect to the housing can be changed in the second direction.

4. The cutting and processing machine according to claim 2 or 3,

the contact member has a flat contact surface that contacts the workpiece,

when the contact member is rotated 180 degrees in a plane parallel to the contact surface, the position of the contact member in the second direction changes between the first position and the second position.

5. The cutter-processor according to any of claims 2 to 4,

the contact member has a through hole through which the cutting blade is disposed so as to be operable,

the through-hole includes:

a first hole disposed so that the cutting blade can be operated when the contact member is located at the first position; and

a second hole disposed so that the cutting blade can be operated when the contact member is located at the second position,

the first hole and the second hole are provided so as to be separated from each other in the second direction.

6. The cut-and-machine according to claim 5,

and a dust collecting device for collecting the processing fragments generated by cutting the processing material and passing through the through holes.

7. The cutter-processor according to any of claims 1 to 6,

the housing has a motor receiving portion for receiving the motor,

when the position of the contact member in the second direction is changed with respect to the housing, the amount of protrusion of the contact member in the second direction with respect to the outer surface of the motor housing portion is changed.

8. The cutter-processor of claim 4,

the cutting blade is operated in a direction intersecting the contact surface,

a center line as a rotation center of the motor is arranged in parallel with the contact surface.

9. The cutter-processor of claim 4,

the cutting machine reciprocates in a direction intersecting the contact surface,

10. The cut-and-machine according to claim 9,

a motion converting mechanism for converting a rotational force of the motor into a reciprocating force of the cutting blade is provided in the housing.

11. The cutter-processor according to any of claims 1 to 10,

the motor is an electric motor and the motor is a motor,

the housing has:

a handle held by an operator; and

and a detachable part connected to the handle and detachable to the battery pack for applying voltage to the electric motor.

12. The cutting and processing machine according to any one of claims 2, 3, 4, 5, 6, 8, 9, 10,

when the position of the contact member in the second direction is changed with respect to the housing, a distance from an end of the contact member to the cutting blade in the second direction is changed.