JPH062517B2 - Electric cutting machine - Google Patents

Description

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

(B) Conventional Technology Conventionally, an electric cutting machine for vertically moving a cutting blade by operating a push button is known from Japanese Patent Publication No. 51-3257. In this conventional example, a movable body that can be pushed downward by a start push button and is constantly urged upward by a spring body is provided, and the cutting blade is pulled down by the downward movement of this movable body. None, the engagement is released by pushing down the engaging piece by pushing the release push button.

According to the configuration of this conventional example, since the cutting blade is configured to be pulled up by the spring body that pulls up the movable body, it is necessary to increase the spring pressure so as to facilitate this pulling up. There is a drawback that the pushing operation for lowering the blade becomes heavy. There is a drawback in that it is uncertain to raise the blade to weaken the spring pressure in order to deal with this drawback. Further, there is a drawback that the mechanism becomes complicated, such as requiring an engaging piece for engaging and holding the blade pulled down state and a release push button for releasing the engaging and holding state.

(C) Problems to be solved by the present invention The present invention, in view of the above-mentioned drawbacks, can easily perform the blade pulling down operation and surely perform the blade pulling up, and further, the structure is simple, and the battery capacity during the opening is The purpose is to provide an electric cutting machine that can easily remove the can even when it is no longer in use.

(D) Means for Solving the Problems The present invention provides a drive wheel that rotates when the rotation of the motor is transmitted to the front side of a main body case that houses a motor and a battery that drives the motor, and is vertically movable above the drive wheel. A cutting blade for cutting the can lid in cooperation with the cutting blade, and a first interlocking body interlocking with the cutting blade in the main body case and urging the interlocking body in a cutting blade pulling down direction. Urging means is provided, and the first body is provided on the upper surface of the main body case.
The present invention is characterized in that a pushing operation body for displacing the interlocking body in the cutting blade pulling up direction is provided, and a second interlocking body having a handle portion interlocking with the cutting blade is provided on the front surface of the main body case.

(E) Action In order to perform cutting by the above means, the blade raising push operation body is pushed against the urging force of the first interlocking body urging means to pull up the cutting blade, and then it is placed on the drive wheel. The edge of the can is placed, the cutting blade is pulled down by the urging force of the urging means, the can edge is sandwiched between the drive wheel and the cutting blade, and the drive wheel is rotated to perform the chopping.
If the battery capacity runs out during this opening, the cutting blade will go deep into the can lid, but in this case, the finger is put on the claw of the second interlocking body regardless of the operation of the push operation body. The cutting blade can be easily pulled up by pulling up.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings. The cutting machine shown in the figure is a handy rechargeable cutting machine, and the main body case
The drive wheel (can feed tooth) (1) is mounted on the front surface of the (K) so as to be rotatable, and the cutting blade (3) is provided above the drive wheel on the front surface so as to be vertically movable to rotate the can. It is something that opens while letting you go. The cutting machine is mainly composed of a drive wheel drive mechanism (A) for rotationally driving the drive wheel (1) and a cutting blade operating mechanism (B), and the drive wheel drive mechanism (A) is a motor (5). Driven by
It includes a mechanical component (A ₁ ) for driving (1) at a low speed and an electrical component (A ₂ ) for electrically controlling the motor.

[1] Body case The body case (K) is made of synthetic resin and has screws (6) (7)
(8) Formed in a flat shape (left-right width L ₁ >> front-back width L ₂ ) from the front case (K ₁ ) and the rear case (K ₂ ) that are detachably connected by (9) And a substantially U-shaped handle portion (12) connected to the mechanism portion (10) so as to have a mechanism portion (10) mainly containing the mechanical component (A ₁ ) and a rectangular handle window (11).
Consists of. The front case (K ₁ ) is divided into a first part (K ₁₁ ) corresponding to the mechanical part (10) and a second part (K ₁₂ ) other than the first part (K ₁₁ ), and both parts (K ₁₁ ) (K ₁₂ ). ) The protrusion and the groove are engaged with each other at the joint portion, and the second portion (K ₁₂ ) to the first portion (K ₁₁ )
The tongue piece (13) projecting so as to overlap with the first portion (K ₁₁ ) is polymerized and fixed by a screw (not shown).

[2] Drive Wheel Drive Mechanism-Mechanical Components (A ₁ ) Next, the drive wheel drive mechanism (A) will be described. The machine component (A ₁ ) is mainly composed of a DC motor (5) and a reduction gear mechanism (14). The motor (5) has its drive shaft (15) protruding toward the front (right end in FIG. 1) side and the electric terminals (16) and (16) facing toward the rear (left end in FIG. 1) side. The partition wall (17) which is perpendicular to the thickness direction of () (direction parallel to the paper surface of FIG. 1) and is laid horizontally in the horizontal direction and is integrally erected on the first portion (K ₁₁ ). A drive shaft (15) is attached to (18) so as to penetrate the partition wall (17), and is fixed to the partition wall (17) by a screw (not shown) penetrating the partition wall (17).

The reduction gear mechanism (14) is for decelerating and transmitting the rotation of the motor drive shaft (15) to the drive wheel (1) rotatably provided protruding from the front surface of the main body case (K). 15) has a metal worm gear (21) fixed to it, a large diameter synthetic resin gear (22) meshing with it, and a small diameter gear (23) located in front of it, from the first part (K ₁₁ ) inward The first gear (G ₁ ) rotatably supported by the metal shaft (24) protruding from the first gear (G ₁ )
₁ ) has a large diameter gear (25) made of synthetic resin that meshes with the small diameter gear (23) and a metal small diameter gear (26) located behind it, and is protruded inward from the first portion (K ₁₁ ). The second gear (G ₂ ) rotatably supported by the metal shaft (27) and the small-diameter gear (26) of this second gear (G ₂ ) mesh with the first part (K ₁₁ ). It comprises a third gear (G ₃ ) fixed to the rear end of a metal shaft (29) rotatably supported by a protruding bearing sleeve (28). At the front end of the shaft (29), that is, the portion protruding from the front case (K ₁ ), the screw groove (3
1) is formed, and the drive wheel (1) is detachably screwed to this portion. The direction of the screw groove (31) is the direction of rotation of the shaft (29).
(X) and the driving wheel (1) are screwed in opposite directions. The rear ends of the shafts (24) (27) (29) are the bosses of the front case (K ₁ ).
It is supported by a metal support plate (34) fixed by screws (not shown) screwed into (32) and (33).

The gear ratio of the reduction gear mechanism (14) is set to, for example, 268: 1, and the gear ratio is 33: 1 due to the worm gear (21) and the first gear (G ₁ ). The following reduction ratio is obtained.

[3] drive wheel drive mechanism - electrical components (A ₂₎ electric components of the drive wheel drive mechanism (A) (A ₂₎ is as shown in Figure 15, the AC utility power outlet for plugging into (not shown) Charge plug (35), step-down transformer (T) connected to this, three secondary (rechargeable) consisting of Ni-Cd batteries connected to the secondary side of this transformer via a rectifier diode (D ₁ ). Battery (b ₁ ) (b ₂ ) (b ₃ ), operation control switch (S) installed in the energizing circuit of the motor (5), reverse current blocking diode connected in series to the secondary side of the transformer (T) (D ₃ ), a light emitting diode (LED) and a resistor (R) that light up when charging, a diode (D ₂ ) that is connected to light up the light emitting diode (LED) during operation
Consists of.

Referring to FIG. 3, the charging plug (35) has pivot shafts (3
5a) (35a) projecting base part (35b) made of synthetic resin and two plug blades (35c) (35c) insert-molded into this, and the motor (5) of the rear case (K ₂ ) ) And a handle window (11) close to the gear mechanism (14) so as to be retractable by rotation. Specifically, the motor of the rear case (K ₂ )
A plug accommodating recess (37) is formed in the protruding part (36) partially protruded according to the thickness of (5), and the plug is accommodated in this recess (37).
(35) is housed from the inside of the rear case (K ₂ ) in the bearing grooves (38) (38) formed in the recess (37) so that the shafts (35a) (35a) are fitted. Then, the plug (35) is immersed in the recess (37) and is flush with the protrusion (36) (see FIG. 3) and the plug blade.
(35c) (35c) is configured to be rotatable between a recess (37) and a protruding state (see FIG. 4) in which the rear case (K ₂ ) is vertically projected. is doing. On the other hand, the front case (K
_In the second part (K ₁₂ ) of ₁ ), the terminal block (41) (41) with the fixed contact plates (39) (39) mounted facing the plug (35) faces the rear case (K ₂ ). Bearings installed on the terminal blocks (41) and (41) when they are integrally projected and the charging plug (35) is stored in the recess (37) and the front case (K ₁ ) and the rear case (K ₂ ) are joined. Pivots (35a) (35) in recesses (42) (42)
It is configured to fit a). (43) is a T-shaped leaf spring installed between the terminal blocks (41) and (41) and the support plate (34).
(41) Fit the base (43a) in the recess between (41) and support plate
The terminal block (41) is provided by providing a rearward protruding portion (34a) on (34).
(41) Position the wall and the protrusion (34a) on the left and right,
Place (43a) on the step ribs (44) (44) provided on the terminal blocks (41) (41), and place the horizontal part (43b) on the support plate (34) (see FIG. 1). ), The protruding / retracted state due to the rotation of the charging plug (35)
A protrusion (not shown) provided on (35b) comes into contact with the elastic member to hold it. If the plug blade (35c) (35c) of the charging plug (35) is protruding, the plug blade (35c)
The rear end protruding from the base (35b) of (35c) is the contact plate (39) (39)
The plug blades (35c) (35c) and the contact plates (39) (39) are held in electrical contact with the plug blades (35c) (35c), and this electrical connection is released when the plug blades (35c) (35c) are immersed. It

The transformer (T) is positioned and arranged by the ribs (45) ... at a position close to the motor (5) in the lower storage space (12A) of the handle portion (12). Since this position is close to the charging plug (35), the high voltage wiring can be short. Two of the secondary batteries (b ₂ )
(b ₃ ) is a rib on the rear side of the transformer (T) in the lower storage space (12A)
(46) ... and the rising wall (47) of the front case (K ₁ ) are positioned and arranged, and the remaining one (b ₁ ) is the upper storage space of the handle (12).
The ribs (48) ... And the rising wall (47) of the front case (K ₁ ) are positioned and arranged at the rear end of the (12B). The former two
The (b ₂ ) and (b ₃ ) are in direct contact with each other, and the other one (b ₁ ) is electrically connected using the contact plate (49), and the three are connected in series.

The operation control switch (B) is a rib (51) of the front case (K ₁ ) ...
The fixed contact plate (54) and the movable contact plate (55) attached to the printed circuit board (53) inserted between the movable contact plate and the rib (52).
It is mainly composed of a first push button (56) for pressing 5). Referring to FIG. 6, the first push button (56) has a semicircular groove (57a) formed on the rising wall (47) of the front case (K ₁ ) and a rising wall (58) of the rear case (K ₂ ). ), A cylindrical portion (56a) that can be inserted into a hole (57) formed by a semicircular groove (57b) and a movable contact plate (55) at the lower end of the cylindrical portion (56a).
The first operating portion at the lower end of the tubular portion (56a), which is the same as the first operating portion (56b) integrally provided so as to face the pressing portion (55a) of the
The second actuating portion (56c) is provided continuously on the opposite side to (56b), and the upper surface of the leading corner portion is notched obliquely to form an inclined surface (50). The tubular portion (56a) engages the peripheral edge (58) of the hole (57) at one end, and the stepped portion (5) for keeping the movable contact plate (55) in contact with the fixed contact plate (54).
9) is formed.

Various measures have been taken to facilitate the engagement of the stepped portion (59). First cylindrical portion (56a) a pair of which is formed on the front side and the rear side and each front case (K ₁₎ and rear case (K ₂₎ of the lower guide rib (61) (61) (the rear case side is not shown) Guide grooves (62) and (62) (front side not shown) are formed. The guide ribs (61) (61) are extended in the vertical direction, but the upper part (61a) and the lower part (61b) are laterally displaced, that is, the lower part (61b) is the leading part with respect to the upper part (61a). It is formed so as to deviate toward the (right end in FIG. 1) side. This guide rib (6
1) When the push button (56) is pushed due to the eccentric configuration of (61), the push button (56) is displaced to the front side. Next, a coil spring (63d) is formed between the cylindrical spring receiver (56d) formed inside the cylindrical portion (56a) (see FIG. ₁ ) and the disc-shaped spring receiver (63) formed integrally with the front case (K ₁ ). 64) is installed, and the disc-shaped spring receiver is attached to the center of the cylindrical spring receiver (56d).
By displacing the center of (63) toward the beginning, the coil spring
The lower part is offset from the upper part of (64) (see Fig. 1)
Therefore, the push button (56) receives the force of moving in the front direction by the original shape restoring force of the coil spring (64).

Further, the pressing portion (55a) of the movable contact plate (55) is bent downward to form a mountain shape, and the pressing portion (55a) is pressed by the pressing protrusion (65) of the first operating portion (56b). With this structure, when the push button (56) is pressed, the elastic force of the movable contact plate (55) urges the pressing portion (55a) in the leading direction. Further, the rear side of the upper surface of the tubular portion (56a) is formed as a low step portion (65) and an inclined surface (67) is formed between the tubular portion (56a) and the high step portion (66). With this structure, push the thumb with the thumb (56)
Pushing the top surface tends to generate force in the front direction.

The diodes (D ₁ ) (D ₂ ) (D ₃ ) and the resistor (R) are attached to the lower surface side of the printed circuit board (53), and the light emitting diode (LED) extends the front side of the printed circuit board (53). Further, the tip end is exposed to the upper surface from the window (68) formed on the upper surface of the first portion (K ₁₁ ) and provided upright on the front surface side of the third gear (G ₃ ).

[4] Cutting Blade Operating Mechanism (B) Next, the structure of the cutting blade operating mechanism (B) will be described. This mechanism (B) is attached to the upper part of the first part (K ₁₁ ) of the body case (K). Referring to FIG. 5, (71) has a rotary shaft (73) which is rotatably supported in a shaft hole (72) formed in the first portion (K ₁₁ ) and is provided in the main body case (K). Rotatably mounted metal first
With the interlocking plate, the cutting blade (3) is detachably fixed to the tip of the rotating shaft (73), and the cutting blade (3) can rotate around the fulcrum (74), that is, the center axis of the rotating shaft (73). ing. The tip fixing portion (73a) of the rotating shaft (73) is smaller in diameter than other portions and is formed in a square shape (if it is non-circular), and the fixing portion (73a) has a second interlocking plate (75) made of synthetic resin. After being press-fitted in the square hole (76), the cutting blade (3) is fitted in the square hole (77) formed in the upper part thereof and having a shape matching the fixing portion (73a), and then into the fixing portion (73a). It is fixed to the fixing portion (73a) by a screw (79) which is screwed into the formed screw hole (78).

The second interlocking plate (75) has a function of holding the first interlocking plate (71) by press fitting so as not to easily fall out of the main body case (K) and the front side of the main body case (K) of the cutting blade (3). It has the function of a spacer that keeps a constant distance from the second interlocking plate (7
5) As a blade lifting lever that integrally forms a hook piece (75a) on the upper edge of the upper edge and hangs a finger on the hook piece (75a) to rotate the second interlocking plate (75) upward. It is also configured to have the function of. Also, the rear end of the handle piece (75a) is the arm support base (90) described later.
The cutting blade (3) is restricted from rotating by abutting on the upper surface of the cutting blade (3).

The cutting blade (3) has a substantially rectangular shape as shown in FIG. 14, and has a fulcrum (74) between the lower end of the side edge (3A) on the leading side and the lower end of the side edge (3B) on the rear side (right side in the figure). ) As the center, an arcuate cutting edge (3C) is formed, and a lower end corner (corner side corner) on the leading side is cut out to form an acute-angled reed edge (3D). One end of the first interlocking plate (71) is locked in the main body case (K) and the other end is locked by a protrusion (71d) formed on the first interlocking plate (71) (biasing means) ( 82), the direction of arrow P in FIG. 5, that is,
It is urged in the blade lowering direction.

(83) is a synthetic resin second push button (pushing member) provided on the upper surface of the body case (K) on the top side of the first push button (56) with reference to FIGS. 6 and 13. ), A tubular part (83a) that slides up and down in a button hole (84) formed on the upper surface of the main body case (K) and a blade operating first operating part (83b) integrally formed at the lower end of the tubular part (83a) A spring receiver (85) formed on the main body case (K) and a spring receiver (83d) formed on the inside of the main body case (K).
(See FIG. 1) A coil spring (86) is provided between the coil spring and the coil spring (86) to constantly urge it upward. The second operating part (83c)
Is located above the slope (50) of the second operating portion (56c) of the first push button (56) (see FIG. 8) locked in the operating state, and the slope (8
7) is formed and the second push button (83) is pushed to shift the first push button (56) in the rearward direction, and the engagement of the push button (56) is released.
The slopes (50) (87) may have either one. (89)
(89) is a pair of guide ribs formed on the front case (K ₁ ) and the rear case (K ₂ ) (the rear case side is not shown), and the tubular portion (83a)
It is fitted in a pair of grooves (91) (91) (front side not shown) formed in front of and behind, and guides the tubular portion (83a) up and down. (92)
Is a synthetic resin actuating lever rotatably supported by a shaft (93) projecting in the main body case (K). The second push button (83) is provided in the middle part.
The first interlocking plate (71) when the operating lever (92) is rotated, and the first engaging portion (92a) projectingly provided so as to abut and engage with the operating portion (83b) when is pressed. It has a second engaging portion (92b) that abuts and engages with the pin (71a) that is provided to project. This operating lever (9
In 2), an operation arm portion (92c) which is easily elastically deformed is integrally formed on the upper middle portion, and when the second push button (83) is pushed at the tip thereof, the first arm portion is formed.
A pin-shaped engaging portion (94) that engages with an engaging groove portion (71b) formed in the interlocking plate (71) is formed, and a release arm is provided on the opposite side of the operating arm portion (92c) with respect to the shaft (93). Part (92d) to the second of the first push button (56)
It is formed so as to face the operating portion (56c), and when the first push button (56) descends, the second operating portion (56c) pushes the release arm portion (92d) and engages with the aforementioned engaging groove portion (71b). The engagement with the part (94) is released.

Reference numeral (95) is a U-shaped leaf spring attached to the main body case (K), and when the cutting blade (3) is in the lowered state, the protrusion of the first interlocking plate (71).
The first interlocking plate (71) is abutted against (71c) and slightly urges the first interlocking plate (71) in the blade pull-up direction. ), A force is applied in the pulling direction, so that the cutting blade (3) can be pulled up easily.

(96) is a can support provided on the front surface of the main body case (K).
Is appropriately separated from the case (K). Reference numeral (97) is a canister holding shaft, and reference numeral (98) is a magnet for attracting a can lid attached to an arm (99) which is rotatable in a horizontal direction.

In the above-mentioned component arrangement, the mounting position of the charging plug (35) is close to the heavy motor (5) and the reduction gear mechanism (14), and the motor (5) and the reduction gear are centered around the charging plug (35). generally opposite the mechanism (14), by taking the weight balance between the left and right which like follows a heavy transformer (T) and a secondary battery (b ₁₎ are arranged - a (b ₃₎ The center of gravity (O) of the device is at the position shown in FIG. 3 and is close to the charging plug (35). As a result, when the charging plug (35) is plugged into a power outlet for charging, an excessive rotational moment is not applied to the charging plug, and the charging plug (3
5) It is possible to prevent damage to the part.

The operation of the above configuration will be described. Cutting blade in the initial state
Assuming that (3) is in the pulled-up state (see the alternate long and short dash line in FIG. 6 and FIG. 2), the can (N) must be held with the left hand and the edge (wound tightening part) of the drive wheel ( 1) Place it on top, and contact the side surface with the support base (96). Then, when the first push button (56) is pressed, the operating lever (92) is rotated to release the engagement between the blade support plate (71) and the operating lever (92), and the cutting blade (3) is lowered, The edge (3D) comes into contact with the lid (N ₁ ) (see FIG. 7). Further, when the first push button (56) is pushed, the contacts (54) (55) come into contact and the operation control switch (S) is turned on.
It is held by the engagement of (59) (see FIG. 8). When the operation control switch (S) is turned on, the drive wheel (1) starts to rotate, the can (N) rotates, and the cutting edge (3) automatically moves from the edge (3D) to the lid (N ₁ ) easily. The bite lid (N ₁ ) is cut. When the second push button (83) is pushed halfway after the lid (N ₁ ) has been cut off, the second actuating portion (83c) comes into contact with the second actuating portion (56c) of the first push button (56) and the first push button (83). (56)
Is released from its engagement and returns to the upper position, and the operation control switch
(S) turns off and the motor (5) stops (see FIG. 6).
Next, hold the can (N) with your left hand and push the second push button (83) all the way to rotate the operating lever (92).
The first interlocking plate (71) rotates and the cutting blade (3) is pulled up,
The pulled-up state is maintained by the engagement between the engaging portion (94) and the engaging groove portion (71b), and the initial state is restored. Can in this state (N)
Can be removed.

If the secondary battery is discharged during the above cut-off operation,
Although the cutting blade bites in as shown in Fig. 14, the cutting edge (3) has a circular arc shape centered on the fulcrum (74), so when the push button (83) is pressed, the cutting edge (N ₁ The cutting blade (3) can be easily pulled up without being caught on the incision edge (100) of (1). If it is difficult to pull up with the push button (83), the second interlocking plate (75) can be held by hand.

Incidentally, the present invention is not limited to the above embodiment, for example, the mounting method of the motor (5) is not limited to the illustration, and the transformer (T) and the batteries (b ₁ ) to (b ₃ ) are disposed at positions. Mutually changeable. Further, the shape of the main body case (K) is not limited to the handy type, but may be the table type. Further, the first interlocking plate (71) is configured to engage the operating lever (92) to maintain the blade raising state. However, this engaging mechanism is deleted and the second push button
(83) The cutting blade (3) may be pulled up only when pressed. In this case, the release arm portion (92d) of the operating lever (92) is also deleted.

(G) Effect According to the present invention configured as described above, since the cutting blade is always urged in the pulling down direction, the blade pulling down operation is easy and the blade pulling up is performed by pushing in the pushing operation body. Therefore, the blade can be surely pulled up, and further, the mechanism for engaging and holding the state where the blade is pulled down and the mechanism for releasing this engaging and holding are unnecessary, and the structure is simplified. In addition, when the battery runs out during opening, it may be difficult to pull up the cutting blade by pushing the pushing operation body. In such a case, put your finger on the handle of the second interlocking body. By pulling it up, the cutting blade can be pulled up easily, which is very effective.

[Brief description of drawings]

1 to 15 show an embodiment of the present invention. FIG. 1 is a rear view of a partial cross section with a rear case removed, FIG. 2 is an overall front view, and FIG. 3 is an overall view. Rear view, FIG. 4 is an overall top view, FIG. 5 is a sectional view taken along line VV of FIG. 1, and FIG.
FIGS. 8 to 9 are explanatory views showing different operating states, FIG.
Figures 10 and 10 are explanatory views showing different operating states,
FIG. 11 is an exploded perspective view of essential parts, FIGS. 12 and 13 are perspective views of parts, FIG. 14 is an explanatory view of a chopping operation, and FIG. 15 is an electric circuit diagram. (1) ... Drive wheel, (3) ... Cutting blade, (5) ... Motor, (71) ... First
Interlocking plate, (82) ... Coil spring (biasing means), (83) ... Second push button (pushing body), (75) ... Second interlocking plate, (K) ... Main body case.

Claims (2)

[Claims] 1. A drive wheel which is rotated by transmitting the rotation of the motor to a front surface side of a main body case for accommodating a motor and a battery for driving the motor, and is provided above the drive wheel so as to be vertically movable in cooperation therewith. A cutting blade for cutting a can lid is provided, wherein a first interlocking body interlocking with the cutting blade and a biasing means for biasing the interlocking body in a cutting blade pulling down direction are provided in the main body case, and A push operation body for displacing the first interlocking body in the cutting blade pulling up direction is provided on the upper surface of the main body case, and a second interlocking body having a handle portion interlocking with the cutting blade is provided on the front surface of the main body case. A characteristic electric cutting machine. 2. A mechanism section in which a main body case houses a motor,
The electric cutting machine according to claim 1, characterized in that the electric cutting machine comprises a handle portion which is connected to the mechanism portion.