JPH0645395B2 - Electric cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric cutting machine.

(B) Detailed Description of the Invention An electric cutting machine as a comparative example of the present invention will be described with reference to FIGS. 6 to 8. (12) 'is a drive wheel provided on the front surface of a main body case (11)' containing a motor (not shown) and rotated by the motor, and (14) 'is a fulcrum above this drive wheel (12)'. (O) ′ is a cutting blade that is rotatable about the
2) '(14)' sandwiches the edge (winding part) of the can (23) ', the drive wheel (12)' rotates the can (23) 'and the cutting blade (14)' covers the can lid ( 23A) 'Difficult to insert and the cutting blade (14)'
It will be opened by.

By the way, in this contrast, as shown in FIG.
3) ′ has a circular shape, whereas the back surface of the cutting blade (14) ′ is formed into a flat surface, so after cutting the can (23) ′ once around it, turning the can further rotates the cutting blade. (14) The edge (E ') of the back surface (14a)' facing the cantilever rotation direction hits the cut surface and scrapes this portion, which causes a problem that shavings are generated.

(C) Problems to be Solved by the Invention In view of the above problems, it is an object of the present invention to prevent generation of shavings with a simple configuration.

(D) Means for Solving the Problems The present invention is characterized in that a recess is formed on the rear surface of the tip of the cutting blade so as to face the inner surface of the can and to face the can rotation direction.

(E) Operation Even when the open canister is rotated by the above-mentioned means, the edge of the cutting blade is formed by the concave portion formed on the rear surface of the tip of the cutting blade on the side facing the inner surface of the canister and facing the canister rotation direction. Is prevented from coming into contact with the cut surface of the can lid, and thus the edge does not scrape the cut surface as in the conventional case.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings. The cut-off machine shown in the figure is a handy type charge-type cut-off machine.It is a secondary mechanism that is connected to this mechanical section (11A) and the mechanical section (11A) that houses the motor (9) and the reduction gear mechanism (10). A main body case (11) is composed of a U-shaped grip portion (11B) for accommodating a battery and a diode (neither shown).

(12) is a drive wheel (feed tooth) provided on the front surface of the main body case (11) so as to project the electric power of the secondary battery by pressing an operating push (13) provided on the upper surface of the main body case (11). Is supplied to rotate the motor (9), and the rotation is transmitted by being decelerated by the reduction gear mechanism. The operation push button (13) is provided with a holding mechanism in a depressed state.

(14) is detachably fixed to the tip of the rotary shaft (16) protruding from the metal blade support plate (15) above the drive wheel (12) and is a fulcrum.
It is a steel cutting blade that can rotate around (O), and the tip fixing part (16A) of the rotating shaft (16) is smaller in diameter than other parts and has a square shape (if it is non-circular), the fixing part After the synthetic resin lever (17) is pressed into the square hole (18) in (16A), the cutting blade
A screw (21) in which (14) is fitted in a square hole (19) formed in the upper part thereof and having a shape matching the fixing portion (16A), and screwed into the screw hole (20) formed in the fixing portion (16A). Is fixed to the fixed part (16A).

The lever (17) has a function of holding the blade support plate (15) so as not to easily fall out of the body case (11) and the cutting blade (14).
It has the function of a spacer that keeps a constant distance from the front of the main body case (11), and a hook piece (17A) is integrally formed from the front on the upper edge of the lever (17). It is configured to also function as a blade-raising lever that hangs a finger on (17A) to rotate the lever (17) upward.

The cutting blade (14) has a substantially rectangular shape as shown in FIG. 1, and has a side edge (14A) lower end on the head side (left side in FIG. 2) and a side edge (14B) lower end on the tail side (right side in the same figure). An arcuate cutting edge (22) is formed between the center and the fulcrum, and a lower end corner portion on the head side (corner side corner portion) is cut out to form an acute-angled wedge edge (22A). Then, as shown in FIG. 1 (b), (c) and (d), the tip of the back surface (14a) of the cutting blade (14) is depressed (8) by pressing on the side facing the rotation direction (R) of the can (23). ) Is formed. Incidentally, (14c) is a polished surface.

(24) is a synthetic resin push button for raising the blade, which is provided on the upper surface of the body case (11), and has a cylindrical portion (24A that slides up and down in a button hole (25) formed on the upper surface of the body case (11). ) And an operating portion (24B) integrally formed at the lower end thereof, and is interposed between the spring receiver (26) formed in the main body case (11) and the panel receiver (27) formed inside itself. It is always urged upward by the coil spring (28). Reference numeral (29) is an operating lever rotatably supported by a shaft (32) projecting in the main body case (11), and is in contact with the operating portion (24B) when the push button (24) is pushed in the middle portion. The first engaging portion (29A) protruding so as to fit with the second engaging portion (29A) abuttingly engaged with the pin (30) protruding on the support plate (15) when the operation lever (29) rotates Each has an engaging portion (29B).

The support plate (15) has one end locked in the main body case (11) and the other end locked by the support plate (15) by the coil spring (31), as shown in FIG. Is urged in the direction,
When the push button (24) is pushed against the spring (31), the lever (29) is rotated around the shaft (32) in the arrow Y direction by the operating portion (24B), and the second engaging portion (29B) is rotated. ), The support plate (15) rotates in the direction of the counter arrow (X) to the position of the broken line in the figure against the spring (31) to raise the cutting blade (14). Then, when the pressing force of the push button (24) is released, the support plate (15) returns to its original position by the spring force of the coil spring (31), and the cutting blade (14) is automatically lowered.
At the same time, the push button (24) returns from the position indicated by the alternate long and short dash line to the position indicated by the solid line by the force of the coil spring (28).

(33) is a can support provided on the front of the main body case (11).
Separate 3) from case (11) as appropriate. (34) is a cane holding shaft. A charging plug (not shown) is provided on the back of the body case (11) so that it can be retracted and retracted.

The operation of the above configuration will be described. The normal cutting blade (14) is at the blade lowering position shown by the solid line in Fig. 2. To perform the cutting operation, first push the push button (24) with the right thumb to move the cutting blade (14) to the broken line position in the figure. Raise and hold the can (23) with the left hand, place its edge on the drive wheel (12), and abut the side surface on the support base (33).
Next, when the pressing force of the push button (24) is released, the cutting blade (14) is lowered and the edge (22A) is brought into contact with the lid (23A). Next, when the push button (13) for driving is pushed with the thumb, the driving switch is turned on, the drive wheel (12) starts to rotate, the can (23) rotates, and the cutting blade (14) automatically moves to the lid (23A). The bite cover (23A) is cut. Lid (23
When you finish cutting A), release the push button (13) for driving,
The motor (9) is stopped, but the can (23) remains the cutting blade (14) and drive wheel.
It is sandwiched between (12) and does not fall even if it is not held by hand.

If the release of the pushbutton (13) for operation after opening is delayed, the can (23) continues to rotate by the drive wheel (12), but at this time, the recess (8) is formed on the back surface of the cutting blade (14). By doing so, the edge of the back side of the cutting blade (14) facing the can rotation direction (R) does not abut the cutting surface of the can lid (23A), so it is possible to prevent the cutting surface from being scraped by this edge. To be done.

The present invention is not limited to the above-mentioned embodiment, and various modifications such as the shape of the main body case can be made. For example, the cutting edge
The cutting edge shape of (14) is not limited to an arc shape.

(G) Effect According to the present invention configured as described above, generation of shavings can be prevented with a simple structure, and safety and other effects can be improved.

[Brief description of drawings]

1 to 5 each show an embodiment of the present invention.
Figures (a), (b), (c) and (d) are front view, right side view, rear view and bottom view of the parts, FIG. 2 is an overall front view and FIG. 3 is III-III of FIG.
FIG. 4 is a sectional view taken along the line, FIG. 4 is a sectional view taken along the broken line of FIG. 5, FIG. 5 is a sectional view taken along the line for explaining the operation, and FIGS. 2, FIG. 7 (a) (b) (c) (d) corresponds to FIG. 1 (b) (b) (c) (d), and FIG. 8 corresponds to FIG. 5, respectively. is there. (8) …… Concave, (9) …… Motor, (11) …… Main body case, (1
2) …… Drive wheel, (14) …… Cutting blade, (23) …… Can, (R) ……
Can rotation direction.

Claims (1)

[Claims] 1. A can edge is sandwiched between a drive wheel provided on the front surface of a main body case containing a motor and rotated by the motor, and a cutting blade provided above the drive wheel and rotatable about a fulcrum. In order to rotate the canister with the drive wheel and to make the cutting blade hard to cover the can, and to open the can with the cutting blade, on the back surface of the tip of the cutting blade, the side facing the inner surface of the can and facing the can rotation direction. An electric cutting machine with a recess formed in the.