JPH0740030U - Electric circular saw - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide an electric circular saw that can easily cut a circular saw blade into a material to be cut. [Structure] The main body housing 1, the circular saw blade 5, and the circular saw blade 5 which is arranged at a predetermined position of the main body housing 1 and has a substantially flat surface capable of contacting a material to be cut. A base 8 for setting the cut amount is provided with a contact member 9 having a predetermined height from a surface capable of contacting the material to be cut.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric circular saw that cuts a material such as wood or metal, and more particularly to a structure of a base that abuts the material to be cut.

[0002]

[Prior art]

 A wide variety of electric circular saws are currently available, for example, there is one that can adjust the cutting amount and angle of the circular saw blade 5. In addition, a wide range of circular saw blades 5 are available, so you can select and cut the circular saw blade 5 that is suitable for each material such as wood, metal, plastic, ALC, glass, and tile. Among the materials to be cut, the metal material has various materials, shapes, and sizes, and for example, there is a pipe having a large pipe diameter that exceeds the cutting amount of the circular saw blade 5, such as a drum can. When cutting this, it is possible to cut it by making a cut with the circular saw blade 5 and then gradually cutting.

[0003]

[Problems to be solved by the device]

 However, the electric circular saw described above is generally one in which the surface of the base 8 that can come into contact with the material to be cut is formed to be substantially flush. Although there is no problem, when cutting a pipe-shaped object that exceeds the cutting amount of the circular saw blade 5 along the outer peripheral surface, as shown in Fig. 18, a surface that can abut the material to be cut of the base 8. Since the base material and the material to be cut are in substantially line contact (broken line in the figure), the base 8 easily rotates to the left and right with respect to the cutting direction during cutting, and straightness deteriorates. Was difficult to match.

Further, the base 8 needs to have a certain level of strength, and thus is generally made of a metal material. Therefore, when the material to be cut is a metal material in particular, the contact between the base 8 and the material to be cut is the contact between the metals, so they have good slidability with each other and are very slippery. When cutting 5 into the material to be cut, it is difficult to temporarily fix the end of the base 8 to the material to be cut, and since work is performed in an unstable state, there was a problem in safety.

The present invention has been made in view of such a point, and an object thereof is to easily cut a circular saw blade into a material to be cut, and An object of the present invention is to provide an electric circular saw that can obtain stable straightness and can easily and safely cut a material that exceeds the cutting amount of a circular saw blade.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, an electric circular saw according to claim 1, wherein a circular saw blade rotated by a drive unit, a main body housing having a handle portion formed outside and a drive unit housed therein, and a main body housing. An electric circular saw having a base for setting a cutting amount of a circular saw blade, which is disposed at a predetermined position of the In addition, a contact portion having a predetermined height from the surface capable of contacting the material to be cut is provided.

In the electric circular saw according to a second aspect of the present invention, the contact portion of the first aspect is provided separately from the base, and from the surface of the base that can contact the material to be cut to the tip of the contact portion. The electric circular saw according to claim 1, wherein the height of the electric circular saw is adjustable.

The electric circular saw according to a third aspect of the present invention is configured such that the abutting portion of the electric circular saw according to the first or the second aspect is formed so as to abut the material to be cut while rolling.

[0009]

[Action]

 According to the configuration of claim 1, the surface of the base that can come into contact with the material to be cut and the contact portion can come into contact with the material to be cut in a stable state.

According to the structure of claim 2, the height of the base member to be cut is adjusted by adjusting the height from the surface of the base that can contact the target member to the tip of the abutting portion according to the shape of the target member. The surface that can come into contact with the material to be cut and the contact portion can more stably come into contact with the material to be cut.

According to the third aspect of the invention, the pushing force when pushing in the cutting direction becomes small.

[0012]

【Example】

 A first embodiment of the present invention will be described with reference to FIGS.

Reference numeral 1 denotes a main body housing, which has a handle portion 1a and a reinforcing portion 1b for increasing rigidity on the outside. Since the main body housing 1 has the reinforcing portion 1b, the handle portion 1a can be formed thin so that it can be easily gripped. Inside the main body housing 1, a motor (not shown), a gear box (not shown) attached to the rotating shaft of the motor, and one end attached to the gear box and the other end to the outside of the main body housing 1. A drive device including a drive shaft (not shown) protruding from the housing is housed.

At one end of the main body housing 1, a battery device 3 for supplying power to the motor by operating the switch 2 is detachably arranged. Reference numeral 4 denotes a lock button, which allows the switch 2 to be operated when the lock button is in the upper position, and disables the switch 2 when the switch 2 is pressed down.

A fixed cover 6 formed in a substantially semicircular shape in plan view is provided on a side portion of the main body housing 1 on the side where the drive shaft is projected so as to cover a substantially upper half of the circular saw blade 5. The fixed cover 6 has a movable cover 7 having a substantially U-shaped cross section so as to cover the cutting edge of the circular saw blade 5 and can be rotated substantially coaxially with the rotation center of the circular saw blade 5. It is attached as follows. The movable cover 7 has a spring support portion 7a, and both ends of the tension spring are supported by the spring support portion 7a and a spring support portion (not shown) protruding from the body housing 1. As a result, when the movable cover 7 is rotated in the direction of arrow A in the figure when the state shown in FIG. 1 is set to the normal state, the urging force is increased in the direction opposite to the rotating direction.

A base 8 having a substantially rectangular shape and a lower surface formed to be substantially flush with is attached to the bottom of the main body housing 1. This base 8 has an insertion hole for inserting the circular saw blade 5 and the movable cover 7 from the upper side to the lower side, and the portion protruding downward from the insertion hole of the circular saw blade 5 is cut into the material to be cut. The amount is. Further, the base 8 has an engagement hole 8a and a mounting hole 8b at a predetermined position on one end side.

A contact member 9 having a substantially semicircular cross section is provided at one end of the lower surface of the base 8 so as to be substantially parallel to the thickness direction of the circular saw blade 5. The abutting member 9 has a protrusion 9a formed at a predetermined position and a male screw portion 9b formed substantially at the center, and the protrusion 9a is engaged with the engaging hole 8a and the male screw portion is formed. By projecting 9b above the mounting hole 8b above the base 8 and tightening the wing nut 10 on this, it is securely fixed to the base 8 without rotating. Further, the abutting member 9 has a slip stopper 11 such as rubber attached to the outer peripheral surface from the lowermost end to the front.

Next, the method of use and the operation of this embodiment will be described. Note that, here, a case will be described in which a material to be cut having a substantially cylindrical shape that exceeds the cutting amount of the circular saw blade 5 is cut.

While pushing down the lock button 4, the switch 2 is operated to rotate the circular saw blade 5. As shown in FIG. 5, the abutting member 9 is brought into contact with the outer peripheral surface of the material to be cut, and the base 8 is tilted on the material to be cut with this as a fulcrum. At this time, the slip stopper 11 is interposed between the contact member 9 and the material to be cut and prevents the contact member 9 from slipping on the material to be cut. It is possible to easily and safely cut into the material to be cut in (5).

Then, as shown in FIG. 6, when the material to be cut comes into contact with the contact member 9 and the lower surface of the base 8, it becomes possible to push the material along the outer peripheral surface of the material to be cut. . At this time, in this embodiment, as shown in FIG. 7, the lower surface of the contact member 9 and the base 8 and the material to be cut are in contact with each other by two lines which are substantially parallel to each other (broken line in the figure). And stability is improved. Therefore, in the present embodiment, it is possible to obtain stable straightness without rotating to the left or right with respect to the cutting direction during cutting.

In the present embodiment, the contact member 9 is provided at one end of the lower surface of the base 8. However, the present invention is not limited to this. It may be provided at the other end of the lower surface of or at substantially the center. If the base 8 of this embodiment is used, it is desirable to provide the contact member 9 at one end or the other end of the lower surface of the base 8.

Further, in the present embodiment, the contact member 9 and the base 8 are provided as separate bodies, but the present invention is not limited to this, and they are integrally formed. May be.

Further, in the present embodiment, the contact member 9 has a substantially semicircular cross section, but the present invention is not limited to this. For example, the cross section has a substantially circular shape. The shape may be oval, triangular, polygonal, or the like.

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. It should be noted that members having substantially the same functions as those of the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

The base 8 of this embodiment has an adjusting portion 12 at a predetermined position at one end. The adjusting portion 12 includes a fixing piece 12a provided on one edge of the through hole provided on the base 8, an L-shaped piece 12b provided on the other edge so as to face the fixing piece 12a, and an adjusting screw 12c for tightening these. It consists of and.

The abutting member 9 has a substantially semicircular cross section, and has an adjusted piece 9c that can penetrate a through hole of the base 8 at a predetermined position. A circular saw blade is provided at one end of the lower surface of the base 8. It is provided so as to be substantially parallel to the thickness direction of 5. The piece to be adjusted 9c has a long hole 9d through which the adjusting screw 12c can pass, and after the desired amount has passed through the through hole of the base 8, by tightening the adjusting screw 12c, both sides are fixed to the fixing pieces 12a and L. It is pressed and fixed to the letter piece 12b. Further, the abutting member 9 has a slip stopper 11 made of rubber or the like attached to the outer peripheral surface from the lowermost end to the front.

Therefore, in this embodiment, since the height from the lower surface of the base 8 to the tip of the contact member 9 can be adjusted, as shown in FIG. When cutting a cylindrical material to be cut, the lower surface of the base 8 and the contact member 9 can be contacted in the most stable state according to the diameter of the material to be cut. FIG. 9A shows the contact state when the diameter of the material to be cut is relatively large, and FIG. 9B shows the contact state when the diameter of the material to be cut is relatively small.

Next, a third embodiment of the present invention will be described with reference to FIGS. 10 and 11. The members having substantially the same functions as those of the first and second embodiments described above are designated by the same reference numerals and the description thereof will be omitted.

The abutting member 9 of this embodiment includes an adjusted portion 9c having a long hole 9d, a roller 9e provided with a slip stopper 11 on the periphery thereof, and a support portion 9f for rotatably supporting the roller 9e. It is constructed and is provided on the base 8 having the adjusting portion 12 similar to that of the second embodiment.

Therefore, according to the present embodiment, the pushing force when pushing in the cutting direction can be reduced, and as a result, the cutting can be performed easily.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 12 to 14. The members having substantially the same functions as those of the first to third embodiments described above are designated by the same reference numerals and the description thereof will be omitted.

The base 8 of this embodiment has a substantially rectangular shape, and spherical contact members 9 are rotatably provided on each of the four corners of the lower surface.

Therefore, in the present embodiment, when abutting the material to be cut, the abutting member 9 abuts at four points, so that stability is ensured and when pushing in the cutting direction. The pushing force can be reduced, resulting in easier cutting.

Although the four spherical contact members 9 are used in the present embodiment, the present invention is not limited to this, and the position where the contact members 9 are provided is taken into consideration. Alternatively, a suitable number of abutment members 9 may be used. Further, in the case of using this embodiment, when one contact member 9 is used, the stability becomes worse as compared with the case of using four contact members 9. Therefore, at least two contact members 9 are provided on one end side or the other end side. Is desirable.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 15 and 16. The members having substantially the same functions as those of the first to fourth embodiments are designated by the same reference numerals and the description thereof will be omitted.

The base 8 of this embodiment has square holes 8c on opposite sides and a fixing portion 8d on the upper surface. Further, the fixed portion 8d has an insertion hole and a screw hole into which the thumbscrew 13 is screwed. The abutting member 9 includes an abutting portion 9g having a substantially semicircular cross section, an extending portion 9h extending above both ends thereof, and a connecting portion 9i capable of connecting one end of the extending portion 9h. Composed. The abutting member 9 is configured such that the connecting portion 9i is passed through the insertion holes of the square hole 8c and the fixing portion 8d, and the extending portions 9h are connected to both ends of the contact portion 9, and the thumbscrew 13 is connected to the connecting portion 9i and the screw hole of the fixing portion 8d. It is attached by tightening from.

In this embodiment, when the contact member 9 is removed from the base 8, a long ruler is passed through the square hole 8c and the insertion hole of the fixing portion 8d, and then the thumb screw 13 is used to fix the fixing portion 8d. The ruler can be attached to the base 8 by tightening it through the screw holes. When the square hole 8c and the insertion hole of the fixed portion 8d are formed large, the contact member 9 and the ruler can be attached to the base 8 at the same time.

[0038]

[Effect of device]

 In the electric circular saw according to claim 1, the surface of the base that can come into contact with the material to be cut and the contact portion can come into contact with the material to be cut in a stable state, and as a result, it is stable during cutting. Straightness can be obtained. Moreover, when cutting a material to be cut that exceeds the cutting amount of the circular saw blade, it is possible to cut easily and safely. Further, the circular saw blade can be easily cut into the material to be cut by bringing the contact portion into contact with the material to be cut and using this as a fulcrum to incline the base against the material to be cut.

In the electric circular saw according to claim 2, the height of the base is adjusted by adjusting the height from the surface of the base that can come into contact with the material to be cut to the tip of the contact portion according to the shape of the material to be cut. Since the surface that can come into contact with the material to be cut and the contact portion can come into contact with the material to be cut in a more stable state, as a result, the effect of claim 1 can be further improved.

In addition to the effect of claim 1 or 2, the electric circular saw according to claim 3 reduces the pushing force when pushing in the cutting direction, and as a result, it can be cut easily. Wear.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is an exploded perspective view of a main part thereof.

FIG. 4 is a side view of the contact member.

FIG. 5 is a side view showing the start of cutting into the material to be cut.

FIG. 6 is a side view showing a cut state of the material to be cut.

FIG. 7 is a simplified perspective view of a main part showing a contact state with the material to be cut.

FIG. 8 is a perspective view of a main part of a second embodiment of the present invention.

FIG. 9 (a) When the material to be cut has a relatively large diameter,
(B) A simplified side view of essential parts showing a contact state with a material to be cut when the diameter of the material to be cut is relatively small.

FIG. 10 is a perspective view of a contact member according to a third embodiment of the present invention.

FIG. 11 is a side view of the contact member.

FIG. 12 is a perspective view of a main part of a fourth embodiment of the present invention.

FIG. 13 is a side view of the enlarged main part.

FIG. 14 is a side view of a simplified main part showing a contact state with the material to be cut.

FIG. 15 is a perspective view of a main part of a fifth embodiment of the present invention.

FIG. 16 is a cross-sectional view of the relevant part.

FIG. 17 is a side view showing a state of cutting into a material to be cut in a conventional example.

FIG. 18 is a simplified perspective view of a main part showing a contact state with the material to be cut.

[Explanation of symbols]

 1 Main body housing 1a Handle part 5 Circular saw blade 8 Base 9 Abutting member

Claims (3)

[Scope of utility model registration request] 1. A circular saw blade rotated by a drive unit, a main body housing having a handle portion formed outside and accommodating the drive unit inside, and a unit to be cut which is arranged at a predetermined position of the main body housing. In an electric circular saw having a base for setting the cutting amount of a circular saw blade whose surface that can come into contact with a material is substantially flush, a predetermined height is provided on the base from the surface that can come into contact with the material to be cut. An electric circular saw provided with an abutting part having. 2. The contact portion is provided separately from the base, and the height from the surface of the base that can contact the material to be cut to the tip of the contact portion is adjustable. Electric circular saw. 3. The electric circular saw according to claim 1, wherein the contact portion is formed so as to contact the material to be cut while rolling.