KR20190014555A - Circular sawing machine of electric driving for cutting plate - Google Patents

Abstract

Disclosed is a powered circular saw machine for cutting a panel that can easily adjust a protruding height of a circular saw relative to a top surface of a mounting plate according to a thickness of a panel or lumber to be cut, can adjust a cut angle of the panel or lumber by adjusting a slope of the circular saw at an angle of 45 degrees to a vertical state perpendicular to the top surface of the mounting plate, thereby improving use convenience, can prevent occurrence of accident caused by a sharp circular saw by detachably engaging a separate safety cover to an upper portion of the circular saw which protrudes upwardly from the mounting plate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular sawing machine for cutting a plate,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric circular saw device for cutting a plate material, and more particularly, to a circular saw device capable of easily adjusting a protruding height of a circular saw with respect to an upper surface of a mounting plate, It is possible to adjust the inclination angle of the plate member or the angle of the member by adjusting the inclination angle within a range of 45 ° from the standing position perpendicular to the upper surface of the mounting plate so as to maximize the convenience of use, And a safety cover member detachably coupled to an upper portion of the circular saw protruding upward from the plate so as to prevent a safety accident caused by a sharp circular saw blade during operation .

In general, a plate material cutting apparatus using various electric circular saws is mainly used in order to more easily cut a plate material such as wood, acryl or soft steel plate.

In the apparatus for cutting a plate material using the electric circular saw, a motor-driven circular saw is provided on the upper surface of the work table, and when the circular saw is rotated in place, a plate material to be cut is pushed toward the circular saw, So that the plate material is cut.

However, since the circular saw is installed at a predetermined height on the work table in such a conventional sheet cutting apparatus using an electric circular saw, the sheet material having a relatively thin thickness can be easily cut, but a thin thick sheet or a synthetic resin pipe is cut There is a problem that it is difficult to do.

In addition, in the conventional sheet material cutting apparatus, since the inclination of the circular saw can not be adjusted arbitrarily, the cutting angle of the sheet material can not be adjusted, so that the convenience of operation is significantly reduced. Therefore, there is a serious problem that there is a risk that the worker is injured by a sharp saw that is rotated at a high speed during a work.

In order to solve such a conventional problem, Korean Patent Laid-Open Publication No. 10-2005-0087091 (name: sheet material cutting device, hereinafter referred to as "prior art") has been proposed.

The prior art includes a working plate on which a through hole is formed on an upper surface and a Y-axis guide groove is formed on both sides of the through hole, a work table provided with a first supporting member and a second supporting member on the bottom surface of the working plate, Axis guide groove for guiding the plate material in a direction perpendicular to the X axis is provided on the X axis of the work plate, while a rectangular guide portion for guiding the plate material in the X axis direction is provided on the X axis side of the work plate, A rotating top adjusting portion for adjusting the height of the rotating top rotated by the driving member to adjust the height of the working table by the height adjusting member is provided on the bottom surface of the rotary table, and cooling water is supplied to the rotating top between the first supporting member and the second supporting member And a cooling water supply unit for supplying the cooling water to the cooling water supply unit.

However, in this prior art, there is provided a configuration capable of adjusting the height of the rotary saw, but the configuration is relatively complicated and troublesome in operation.

In addition, in the above-described prior art, there is a problem that the workability is very poor because the configuration for adjusting the inclination of the rotary top is not provided, and also the safety cover is not provided and the safety risk of the work is very high.

1. Korean Patent Laid-Open Publication No. 10-2005-0087091, "Sheet material cutting device".

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and an object of the present invention is to provide a new plate material cutting apparatus which can easily adjust the protrusion height of the circular saw with respect to the upper surface of the plate, An electric circular saw device is provided.

Another object of the present invention is to provide a circular saw capable of adjusting the inclination angle within an angular range of 45 degrees from a state in which the circular saw is erected at right angles to the upper surface of the mounting plate, And to provide a motorized circular saw device for cutting a new plate material.

It is a further object of the present invention to provide a new plate member for preventing a safety accident caused by a sharp circular saw blade during operation by allowing a separate safety cover member to be detachably coupled to an upper portion of a circular saw protruding upward from the mounting plate And to provide an electric circular saw device for cutting.

According to an aspect of the present invention, there is provided an electronic apparatus comprising: a mounting plate having a through hole formed on a top surface thereof in a direction corresponding to a cutting direction of a plate; A housing rotatably hinged to the left and right bottom portions of the mounting plate in a state of being disposed below the mounting plate corresponding to the vertically downward direction of the through-hole and having an upper portion opened; A side plate installed at a lower portion of one side of the mounting plate so as to be spaced apart from the side portion of the housing by a predetermined distance; An electric motor installed in a horizontal direction outside the housing and driven in response to application of a current; An operation switch installed at one side of the side plate and controlling driving of the electric motor in cutting operation of the plate in a state of being electrically connected to the electric motor and the external power source; And a motor shaft of the electric motor is fixedly coupled to the center of the through hole so as to protrude outward from an upper portion of the through hole on the mounting plate, A circular saw which cuts the plate material placed on the mounting plate while rotating in the same direction as the driving direction; A circular saw lifting member installed between the electric motor and the mounting plate and the side plates to vertically move the electric motor and the circular saw in accordance with the thickness of the plate; A circular saw angle adjusting member provided on the housing and the side plate to adjust the inclination of the circular saw in an angle range of 45 degrees sideways from a vertically erected state in accordance with the cutting angle of the plate; A safety cover member for preventing the operator from being injured by the circular saw rotating upward while being lifted up by the thickness of the plate material when cutting the plate material in a state in which the plate material is installed above the top of the circular saw protruding from the upper portion of the through- .

In the present invention, a hinge piece having a downwardly curved shape is coupled to both ends of the upper portion of the housing so as to be pivotally moved in the left and right direction according to the rotation motion of the hinge shaft, and a semi-circular hinge piece guide plate for guiding the turning operation of the hinge piece is installed And a plate spring is provided between the hinge piece and the hinge piece guide plate to elastically rotate the hinge piece.

In the present invention, the circular saw elevating member is formed so as to protrude from both sides in a state where the circular saw elevating member is inserted into a front portion of an electric motor disposed on the outer side of the housing and has a screw fastening hole formed at both right and left ends, ; A pair of leadscrews which are inserted and fastened to the screw fastening holes of the elevating guide piece in a threaded manner and whose upper and lower ends are rotated to be rotated with respect to the outer surface of the housing; A horizontal bevel gear coupled to a lower end portion of a lead screw provided at a position adjacent to the side plate among the pair of lead screws; The adjustment handle is fixedly coupled to the outer end of the side plate, and the inner end of the adjustment handle is engaged with the horizontal bevel gear to transmit the rotational force of the adjustment handle to the horizontal bevel gear. And a rotary shaft to which a vertical bevel gear is coupled.

In the present invention, the circular top angle adjusting member includes: an adjusting rod projected from the upper side of the side surface of the housing adjacent to the side, so as to protrude outside the side plate; A guide hole formed in an arc shape in accordance with a rotation range of the adjustment rod on a side plate corresponding to a position where the adjustment rod is fitted; The adjusting rod is coupled to the adjusting rod protruding outwardly of the guide hole in a threaded manner so that the adjusting rod is moved along the guide hole. When the adjusting rod reaches a desired position, An adjustment lever; An angle adjusting hole formed on the side plate corresponding to the lower side of the guide hole and formed in an arc shape having the same radius of curvature as the guide hole and having a ruler indicating an angle along the upper edge; And an angle of the angle of the angle adjusting ball with respect to the angle of the angle adjusting ball in accordance with the movement of the adjusting rod in accordance with the operation of the angle adjusting lever is set so as to be exposed to the outside of the angle adjusting ball on the side plate in a state of being coupled to the outer surface of the housing, And an angle indicating part indicating a ruler of the display part.

In the present invention, the safety cover member includes: a bracket fixedly installed laterally outside the outer end of the circular saw from the front portion of the electric motor located inside the housing; An arc-shaped coupling hole fixedly connected to an outer end of the bracket and adapted to adjust a fixing height of the circular saw to a protruding height of the circular saw along a center line on a surface thereof, A supporting piece formed with an engaging groove; A horizontal safety cover installed to be engaged with an engaging groove formed at an upper end of the supporting piece and horizontally installed along the rotational direction of the circular saw at a position above the circular saw and having a guide pin and a fixed guide pin at the rear; Wherein a circular guiding groove is formed on an inner surface of the horizontal safety cover opposite to the guide pin of the horizontal safety cover, And a side safety cover having an arc-shaped guide hole formed therein.

In order to allow the protruding and retractable guide pin to be protruded and accommodated outside the side surface of the horizontal safety cover, a lever that is tilted in the forward and backward directions is fitted on the outer surface of the protruding portion fitted with the protruding guide pin, And a cam is formed at a position where the contacting surfaces are offset from each other. When the lever is turned backward, the guide-out pin protrudes toward the guide groove on the side safety cover.

According to the present invention, the protruding height of the circular saw with respect to the upper surface of the mounting plate can be easily adjusted according to the thickness of the plate material or the object to be cut, and the circular saw can be rotated from a state in which the circular saw is erected at right angles to the upper surface of the mounting plate It is possible to adjust the inclination within an angular range of 45 degrees to the side, so that the cutting angle of the plate material or the individual pieces can be adjusted, thereby maximizing convenience in use.

Further, according to the present invention, since a separate safety cover member is detachably coupled to the upper part of the circular saw protruding upward from the mounting plate, it is possible to prevent a safety accident caused by a sharp circular saw blade rotating at high speed during operation So that the operational safety is greatly improved.

1 is a perspective view showing an electric circular saw apparatus for cutting a plate according to the present invention.
FIG. 2 is a diagram showing the inside of an electric circular saw apparatus for cutting a sheet material according to the present invention.
Fig. 3 is an operating state view and partially enlarged view showing a lifting operation of the circular saw in the electric circular saw apparatus for cutting a plate material according to the present invention.
4 is a partially separated perspective view showing a safety cover member in an electric circular saw apparatus for cutting a plate according to the present invention.
5 is a side view showing the angle adjusting operation of the circular saw in the electric circular saw apparatus for cutting a plate material according to the present invention.
6 is an operational state view showing an angle adjusting operation of a circular saw in an electric circular saw apparatus for cutting a plate material according to the present invention.
7 is an assembled state and operation state of a safety cover member in an electric circular saw apparatus for cutting a plate material according to the present invention.
8 is a plan view and a partial enlarged view of an electric circular saw apparatus for cutting a plate material according to the present invention.
FIG. 9 is a side view showing a hinged state of a housing in an electric circular saw apparatus for cutting a plate material according to the present invention.
10 is a partially enlarged view showing a state of hinging of the housing in the electric circular saw apparatus for cutting a plate material according to the present invention.
11 is a perspective view showing a state in which an electric circular saw device for cutting a plate material according to the present invention is installed on a workbench.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 11, a motor-driven circular saw apparatus 10 for cutting a plate according to the present invention is provided with a mounting plate 20 having a predetermined size, and on the upper surface of the mounting plate 20, A through hole 21 is formed in a direction coinciding with the cutting direction of the substrate.

In the present invention, a housing (30) having an upper portion is disposed on a lower portion of a mounting plate (20) corresponding to a vertical lower portion of the through hole (21) And a separate side plate 40 is installed at a lower portion of one side of the mounting plate 20 so as to be spaced apart from the side surface of the housing 30 by a predetermined distance.

In the present invention, a hinge piece 31 having a downwardly curved shape is coupled to both ends of the upper end of the housing 30 so as to be pivotally moved in the left and right direction according to the rotation operation of the hinge shaft 32, A circular hinge piece guide plate 33 for guiding the turning operation of the hinge piece 31 is provided between the hinge piece 31 and the hinge piece guide plate 33, And a leaf spring 34 for allowing the leaf spring 34 to be formed.

An electric motor M driven in accordance with the application of a current is provided in the horizontal direction from the outside of the housing 30 and electrically connected to the electric motor M and the external power source An operation switch S for controlling the driving of the electric motor M is installed during the cutting operation of the plate material.

A circular saw 50 for cutting the plate material is disposed in the housing 30 corresponding to the vertical lower portion of the through hole 21. The upper portion of the circular saw 50 penetrates through the mounting plate 20, And the motor shaft of the electric motor M is fixedly coupled to the central portion of the circular saw 50 so as to be rotated in the driving direction of the electric motor M .

A circular saw lifting member (not shown) is mounted between the electric motor M and the mounting plate 20 and the side plate 40 to vertically move the electric motor M and the circular saw 50 in accordance with the thickness of the plate material 60 for adjusting the inclination of the circular saw 50 in the angular range of 45 degrees sideways from the vertical standing position in accordance with the cutting angle of the plate material on the housing 30 and the side plate 40, The angle adjusting member 70 is provided.

A circular saw 50 is mounted on the upper portion of the circular saw 50 protruding from the upper portion of the through hole 21 on the mounting plate 20 while being lifted upward by the thickness of the plate material during cutting operation of the plate material. A safety cover member 80 is provided to prevent an operator from being injured.

In order to construct the circular saw elevating member 60 in the present invention, the elevating guide piece 61 protruding to both the left and right sides is fitted and coupled to the front portion of the electric motor M disposed outside the housing 30 And screw fastening holes 61a extending in the longitudinal direction are formed at both left and right ends of the elevation guide piece 61. [

A pair of lead screws 62 are inserted into the screw fastening holes 61a on the elevating guide piece 61 in a threaded manner so that the upper and lower ends of the lead screw 62 are connected to the housing 30 And is rotated to be rotated in the longitudinal direction.

A horizontal bevel gear 63 is coupled to a lower end portion of the lead screw 62 provided at a position adjacent to the side plate 40 among the pair of lead screws 62, And the rotation shaft 64 is inserted and coupled to the side plate 40 corresponding to the position.

An adjustment handle 65 is fixedly coupled to an outer end of the rotary shaft 64 and an inner end of the rotary shaft 64 is engaged with the horizontal bevel gear 63 to transmit the rotational force of the adjustment handle 65 to a horizontal bevel gear 63. [ And a vertical bevel gear 66 for transmitting the vertical bevel gear 66 to the output shaft 63.

In order to construct the circular top angle adjusting member 70 according to the present invention, an adjusting rod 71 is provided on the outer side of the side plate 40 from the upper side of the side surface of the housing 30 adjacent to the side plate 40 Are protruded.

An arcuate guide hole 72 is formed on the side plate 40 corresponding to the position where the adjustment rod 71 is fitted and is aligned with the rotation range of the adjustment rod 71, An adjusting lever 73 is provided on the adjusting rod 71 to move the adjusting rod 71 along the guide hole 72 and to tighten the adjusting rod 71 when the adjusting rod 71 reaches a desired position to prevent the adjusting rod 71 from flowing And are coupled to each other so as to be loosened or tightened.

An arc-shaped angle adjusting hole 74 having the same radius of curvature as that of the guide hole 72 is formed on the side plate 40 corresponding to the lower side of the guide hole 72. The angle adjusting hole 74, A ruler 75 indicating an angle along the upper edge of the display screen is displayed.

An angle indicator 76 is coupled to the outer surface of the housing 30 at the lower side of the adjusting rod 71 so as to be exposed to the outside of the angle adjusting hole 74 on the side plate 40 The angle indicating piece 76 is configured to indicate a ruler 75 at an angle indicated by the edge of the angle adjusting hole 74 in accordance with the movement of the adjusting rod 71 in accordance with the operation of the angle adjusting lever 73.

In order to construct the safety cover member 80 according to the present invention, the electric motor M disposed inside the housing 30 is provided with a separate outer side from the outer end of the circular saw 50, A bracket 81 is fixedly installed, and an arc-shaped support piece 82 is coupled to an outer end of the bracket 81.

An arc-shaped coupling hole 82a is formed on the center line of the arc-shaped supporting piece 82 so as to adjust the fixing height of the circular saw 50 with respect to the bracket 81, An engagement groove 82b is formed at the upper end of the support piece 82

The rear end of the horizontal safety cover 83 is engaged with the engagement groove 82b on the support piece 82 so that the rotation direction of the circular saw 50 from above the circular saw 50 Guide guide pin 84 and a fixed guide pin 85 are installed laterally on the rear side of the horizontal safety cover 83. [

A separate side safety cover 86 is coupled to the rear end of the horizontal safety cover 83 so as to be vertically rotated. On the inner surface of the horizontal safety cover 83, which faces the projecting guide pin 84, An arc-shaped guide groove 86a is formed and an arc-shaped guide hole 86b is formed at a position facing the stationary guide pin 85 on the horizontal safety cover 83. [

In order to allow the protruding guide pin 84 to be protruded and accommodated outside the side surface of the horizontal safety cover 83, the protruding portion 84a of the protruding portion 84a, which is fitted with the protruding guide pin 84, Cams 84b are formed on the surfaces of the lever 87 and the projections 84a which are in contact with each other so as to be offset from each other so that when the lever 87 is pushed backward, 84 protrudes toward the guide groove 86a on the side safety cover 86.

The operation of the present invention is as follows.

1 to 10, when the operating switch S is turned ON, the electric motor (not shown) is turned on when the plate is cut by using the electric circular saw device 10 for cutting the plate according to the present invention. M is driven and the circular saw 50 fixedly coupled to the motor shaft is rotated in a state of being protruded above the through hole 21 on the mounting plate 20. [

At the same time, the plate material to be cut is placed on the upper surface of the mounting plate 20 and is pushed toward the circular saw 50, so that the plate material is cut by the circular saw 50 rotating rapidly.

2 and 3, when the protruding height of the circular saw 50 is adjusted according to the thickness of the plate material to be cut in this process, the adjustment handle (not shown) constituting the circular saw lifting member 60 The rotational force of the adjustment handle 65 is transmitted to the vertical bevel gear 66 and the horizontal bevel gear 63 through the rotary shaft 64 and the rotation of the horizontal bevel gear 63 The elevating guide piece 61 screwed with the lead screw 62 is lifted upward or downward so that the electric motor M and the electric motor M are rotated in the same direction, The circular saw 50 is operated to ascend and descend so that the projecting height of the circular saw 50 can be adjusted.

In order to adjust the cutting angle of the plate material, as shown in FIGS. 5, 6, 9, and 10, the angle adjusting lever 73 protruding outward from the side plate 40 is loosened, 71 and the adjustment rod 71 is moved to the right along the guide hole 72, the adjustment rod 71 and the fixed housing 30 as a whole hinge the hinge piece 31 coupled with the hinge shaft 32, And the inclination of the circular saw 50 is adjusted within an angular range of 45 degrees laterally from the state where the circular saw 50 is vertically erected.

The elasticity of the leaf spring 34 provided between the hinge piece 31 and the hinge piece guide plate 33 allows the hinge piece 31 to be elastically rotated.

The angle indicating piece 76 provided at the lower side of the housing 30 is moved along the angle adjusting hole 74 to indicate the ruler 75 displayed on the upper edge of the angle adjusting hole 74 When the indicated ruler 75 reaches a desired angle, the angle adjustment lever 73 is tightened again to fix the adjustment rod 71. [

In this way, the inclination of the circular saw 50 can be easily adjusted according to the cutting angle of the plate material.

In addition, since the safety cover member 80 is installed on the upper part of the circular saw 50 in the above-described cutting process, it is possible to prevent a safety accident caused by the sharp circular saw 50 rotating at high speed. As shown, when the plate material is pushed toward the circular saw 50 rotating in place to cut the plate material, the side safety cover 86 is rotated upward by the thickness of the plate material, and when the cutting operation of the plate material is completed And returned to its original position by the own weight of the side safety cover (86).

The upward and downward movement of the side safety cover 86 is performed by a guide pin 84 projecting from the rear side of the horizontal safety cover 83 inserted in the engagement groove 82b formed in the upper end of the support piece 82, The fixed guide pins 85 are inserted into the guide grooves 86a and the arcuate guide holes 86b formed at the opposing positions of the side safety covers 86 and are arbitrarily moved.

According to the present invention, the protruding height of the circular saw (50) relative to the upper surface of the mounting plate can be easily adjusted according to the thickness of the plate material or the shape of the object to be cut, and the circular saw (50) It is possible to adjust the inclination angle within a range of angle of 45 degrees from the state of standing at a right angle with respect to the upper surface of the plate.

Since a separate safety cover member 80 is detachably coupled to the upper portion of the circular saw 50 projecting upward from the mounting plate 20, it is possible to prevent a safety accident caused by a sharp circular saw blade rotating at high speed during operation It is possible to improve the safety in operation.

The electric circular saw device 10 for cutting a plate according to the present invention can be used alone or can be installed in a separate work table 90 as shown in FIG.

10: Electric circular saw device for plate cutting
20: mounting plate 21: through hole
30: housing 31: hinge piece
32: hinge shaft 33: hinge plate guide plate
34: leaf spring 40: side plate
50: circular saw 60: circular saw elevating member
61: lift guide 62: lead screw
63: Horizontal bevel gear 64:
65: Adjustment handle 66: Vertical bevel gear
70: circular saw angle adjusting member 71: adjusting rod
72: Guide ball 73: Angle adjusting lever
74: Angle adjustment ball 75: Ruler
76: angle indicator 80: safety cover member
81: Bracket 82:
83: Horizontal safety cover 84: Guide guide pin
84a: projecting portion 84b: cam portion (Cam)
85: Fixed guide pin 86: Side safety cover
86a: guide groove 86b: guide ball
87: lever 90: work table
M: Electric motor S: Operation switch.

Claims (6)

A mounting plate (20) having a through hole formed on its upper surface in a direction coinciding with a cutting direction of the plate material;
A housing (30) disposed at a lower portion of the mounting plate corresponding to a vertically lower portion of the through-hole, hinged to the left and right bottom portions of the mounting plate so as to be rotatable,
A side plate 40 installed at a lower portion of one side of the mounting plate so as to be spaced apart from the side portion of the housing by a predetermined distance;
An electric motor M installed horizontally from the outside of the housing and driven according to application of a current;
An operation switch (S) installed at one side of the side plate and controlling driving of the electric motor when cutting the plate material in a state of being electrically connected to the electric motor and the external power source;
And a motor shaft of the electric motor is fixedly coupled to the center of the through hole so as to protrude outward from an upper portion of the through hole on the mounting plate, A circular saw (50) for cutting the plate material placed on the mounting plate while being rotated in the same direction as the driving direction;
A circular saw lifting member (60) installed between the electric motor and the mounting plate and the side plate to vertically move the electric motor and the circular saw in accordance with the thickness of the plate;
A circular saw angle adjusting member (70) provided on the housing and the side plate to adjust the inclination of the circular saw within an angle range of 45 ° from a vertically erected state in accordance with the cutting angle of the plate;
A safety cover member for preventing an operator from being injured by a circular saw rotating upward while being lifted up by the thickness of the plate material when cutting the plate material in a state in which it is installed above the circular saw protruding from the upper portion of the through- 80). ≪ / RTI > The method according to claim 1,
A hinge piece 31 having a downwardly curved shape is coupled to both ends of the upper portion of the housing 30 so as to be pivotally moved in the left and right direction according to the rotation operation of the hinge shaft 32;
A semicircular hinge piece guide plate 33 for guiding the turning operation of the hinge member is provided below the hinge piece 32,
And a leaf spring (34) is provided between the hinge piece and the hinge piece guide plate to elastically rotate the hinge piece. The method according to claim 1,
The circular saw elevating member 60 is formed to protrude left and right in a state where the circular saw elevating member 60 is fitted to the front portion of the electric motor disposed at the outside of the housing and has screw fastening holes 61a formed at both left and right ends thereof An elevating guide piece (61);
A pair of leadscrews 62 which are inserted into and screwed into the screw fastening holes on the elevating guide piece and whose upper and lower ends are installed in the longitudinal direction with respect to the outer surface of the housing and are rotated in place;
A horizontal bevel gear 63 coupled to a lower end of a lead screw provided at a position adjacent to the side plate among the pair of lead screws;
A control handle 65 is fixedly coupled to an outer end of the side plate, and an inner end of the control handle is engaged with the horizontal bevel gear so that the rotation of the control handle is transmitted to a horizontal bevel gear And a rotary shaft (64) to which a vertical bevel gear (66) for transmitting the rotary bevel gear (66) is coupled. The method according to claim 1,
The circular saw angle adjusting member (70) has an adjusting rod (71) projected from the upper side of the side wall of the housing adjacent to the side so as to protrude outward from the side plate;
A guide hole (72) formed in an arc shape in accordance with a rotation range of the adjustment rod on a side plate corresponding to a position where the adjustment rod is fitted;
The adjusting rod is coupled to the adjusting rod protruding outwardly of the guide hole in a threaded manner so that the adjusting rod is moved along the guide hole. When the adjusting rod reaches a desired position, An adjustment lever 73;
An angle adjusting hole 74 formed on the side plate corresponding to the lower side of the guide hole and having an arc shape having the same curvature radius as the guide hole and having a ruler 75 indicating an angle along the upper edge;
And an angle of the angle of the angle adjusting ball with respect to the angle of the angle adjusting ball in accordance with the movement of the adjusting rod in accordance with the operation of the angle adjusting lever is set so as to be exposed to the outside of the angle adjusting ball on the side plate in a state of being coupled to the outer surface of the housing, And an angle indicating piece (76) for indicating a scale of the cutter. The method according to claim 1,
The safety cover member (80) includes a bracket (81) fixedly installed laterally outside the outer end of the circular saw from the front of the electric motor located inside the housing;
An arc-shaped coupling hole 82a is formed which is fixed to the outer end of the bracket and which is adjustable in height with the protrusion height of the circular saw along the center line on the surface, On the other hand, a support piece 82 having an engagement groove 82b formed at an upper end thereof;
A guide pin (84) and a stationary guide pin (82) are fixed to the rear end of the circular saw so as to be slidably engaged with an engagement groove formed in the upper end of the support piece (82) 85) is installed;
A guide groove 86a is formed on the inner surface of the horizontal safety cover so as to face the protruding guide pin on the horizontal safety cover, And a side safety cover (86) having an arc-shaped guide hole (86b) formed at a position facing the side surface safety cover (86). 6. The method of claim 5,
In order to project the retractable guide pin 84 to the outside of the side surface of the horizontal safety cover 83, a lever 87 that is turned back and forth is fitted on the outer surface of the protruding portion 84a fitted with the retractable guide pin Installed;
A cam portion 84b is formed at a position where the lever 87 and the protruding portion 84a come into contact with each other so that the projecting and retracting guide pin 84 is engaged with the side safety cover 86 when the lever 87 is turned back. Is projected toward the guide groove (86a) on the upper surface of the plate-like member.

Images