JP6953227B2 - Bar cutting machine - Google Patents

Description

The present invention relates to a bar cutting machine for cutting bar such as all screw bolts.

As exemplified in Patent Document 1, the bar cutting machine is provided with, for example, a pair of cutting blades including a fixed blade and a movable blade, and is projected onto the upper surface of the housing, via a motor and a cam provided in the housing. It is possible to cut rods such as all screw bolts by shearing the cutting blade.

Japanese Unexamined Patent Publication No. 10-202418

In such a bar cutting machine, since guard portions are formed in the housing to cover the cutting blades protruding upward, it is difficult to see the cut portions from the outside (especially from above) during the work, and the cutting blades The position was difficult to understand.

Therefore, an object of the present invention is to provide a bar cutting machine in which the cutting portion is easily visible and the position of the cutting blade is easy to understand.

In order to achieve the above object, the invention according to claim 1 is housed in a housing in the order of a motor, a reduction mechanism, and an actuating mechanism from the rear, and an actuating shaft in the front-rear direction by the actuating mechanism on the upper front side of the housing. A bar material cutting machine in which a pair of cutting blades that perform shearing operations are provided so as to project upward, and a bar material that is positioned in the front-rear direction on the upper surface of the housing can be sheared by the pair of cutting blades.
The housing is divided into front and rear at the position of the operating mechanism, and is formed by assembling a rear housing portion for accommodating the motor and the reduction mechanism and a front cover for covering the operating mechanism from the front.
The top of the housing, is formed left guard portion covering the outside from the right and left part of the cutting blade and the right guard portion, Ri least partially transparent der of the upper portion of the cutting blade in at least the left guard,
A light source that emits light toward the cutting blade when the cutting blade is operated is provided in the vicinity of the cutting blade, and at least the transparent portion above the cutting blade emits light due to the light emission of the light source.
The guard portion provided with the transparent portion is provided with a transparent partition portion extending between the light source and the cutting blade.
The partition portion is characterized in that it is arranged between the left side guard portion and the right side guard portion and is formed in a flat plate shape that does not project upward, and is arranged between the rear housing portion and the front cover .
The invention according to claim 2 is characterized in that, in the configuration of claim 1, the guard portion provided with the transparent portion is provided with a holding portion for a light source .
The invention according to claim 3 is characterized in that, in the configuration of claim 2, the partition portion and the holding portion of the light source project rearward .
The invention according to claim 4 is characterized in that, in the configuration according to any one of claims 1 to 3, the upper portion and the partition portion in the guard portion provided with the transparent portion are integrally formed. ..

According to the first aspect of the present invention, by making at least a part of the upper part of the cutting blade in the guard portion formed in the housing transparent, the cutting portion becomes easy to see and the position of the cutting blade becomes easy to understand. ..
In particular , since the transparent portion of the guard portion emits light by the light source, the visibility of the cutting portion and the cutting blade can be ensured even in a dark place.
Further , by providing the guard portion with a partition portion extending between the light source and the cutting blade, it is possible to prevent foreign matter from entering the housing.

It is a side view of all screw cutters. It is a front view of all screw cutters. It is a rear view of all screw cutters. It is a central vertical sectional view of all screw cutters. It is a side view of the all-screw cutter equipped with a gauge. It is a front view of all screw cutters in a state where the front cover is omitted. In the explanatory view of the LED holder, (A) shows a perspective view from the rear, and (B) shows a perspective view from the front. In the explanatory view of the LED holder, (A) shows a front surface, (B) shows a flat surface, (C) shows a left side surface, and (D) shows a right side surface. In the explanatory view which shows the assembled state of the LED holder by omitting the front cover and the operating mechanism, (A) shows the front surface, and (B) shows the side surface, respectively. In the explanatory view which shows the transparent part by the LED holder, (A) shows a plane, and (B) shows a side surface. In the explanatory view which shows the closing operation of the actuating mechanism, (A) shows the central vertical cross section, and (B) shows the AA line cross section. In the cross-sectional explanatory view of the front end portion of the guide member, (A) shows the first guide posture, and (B) shows the second guide posture. In the explanatory view of the state where all the large-diameter screw bolts are set, (A) shows the side surface and (B) shows the back surface. In the explanatory view of the state where all the small diameter screw bolts are set, (A) shows the side surface and (B) shows the back surface. It is a side view of all screw cutters with a cover attached. It is a perspective view of a cover. In the explanatory view of the cover, (A) shows the front surface, (B) shows the flat surface, (C) shows the bottom surface, and (D) shows the right side surface. It is a side view which shows the stationary cutting state of all the large diameter screw bolts. It is sectional drawing in the part of all screw bolts which shows the stationary cutting state of all screw bolts of a large diameter.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 4 show a full screw cutter which is an example of a bar cutting machine. FIG. 1 shows a side surface, FIG. 2 shows a front surface, FIG. 3 shows a back surface, and FIG. 4 shows a central vertical cross section.
The all-screw cutter 1 includes a main body portion 2 in the front-rear direction, a handle portion 3 extending diagonally backward from the main body portion 2, and a battery mounting portion 4 provided at the lower end of the handle portion 3. A support bar 5 is erected in front of the handle portion 3 between the front portion of the main body portion 2 and the front portion of the battery mounting portion 4. The housing 6 of the all-screw cutter 1 forms the main body 2 by screwing a pair of left and right half-split housings 6a and 6b connecting the main body 2, the handle 3, the battery mounting portion 4 and the support bar 5 from the left and right. It is formed by screwing a separate front cover 7 from the front of the left and right half-split housings 6a and 6b. One end of a hanging hook 8 is rotatably connected to the left side surface of the rear portion of the main body 2. The hook 8 is routed forward along the outer surface of the main body 2 from a storage position where the hook 8 is locked to the locking portion 9 provided on the right side surface, to a position where the hook 8 is removed from the locking portion 9 and protrudes rearward. It is rotatable.

On the upper surface of the front portion of the main body portion 2, a cutting portion 10 for cutting all screw bolts as a bar material is provided by a fixed blade 60 as a cutting blade and a movable blade 61, which will be described later. On the left and right sides of the cut portion 10, the half-split housings 6a and 6b and the front cover 7 have a trapezoidal front view and a right side guard portion 11 protruding upward, and a front view triangular shape and lower than the right side guard portion 11. A left guard portion 12 projecting upward at a height is formed to cover the fixed blade 60 and the movable blade 61 from the outside.
A hexagonal hole 13 is formed through the upper part of the right guard portion 11 in the front-rear direction, and as shown in FIG. 5, a cross section for determining a cutting position of all screw bolts in the length direction is formed in the hexagonal hole 13. A hexagonal rod-shaped gauge 14 can be loosely inserted. On the right side surface of the right side guard portion 11 on the housing 6b side, a knob screw 15 for pressing and fixing the gauge 14 penetrating the hexagonal hole 13 from the outside can be screwed in. With this gauge 14, all screw bolts can be cut to a fixed size by bringing the front end into contact with the wall, or can be cut according to the scale marked on the gauge 14.
Further, in the right guard portion 11, as shown in FIG. 6, a columnar rubber pin 16 having a part of the outer peripheral surface protruding into the hexagonal hole 13 is provided. Therefore, the gauge 14 loosely inserted into the hexagonal hole 13 is pressed by the rubber pin 16 and temporarily fixed even when it is not fixed by the knob screw 15, and it is prevented from unexpectedly falling out of the hexagonal hole 13.

A part of the rear side of the left side guard portion 12 is formed by an LED holder 17 arranged between the front cover 7 and the left half-split housing 6a. The LED holder 17 is integrally formed of a transparent resin, and as shown in FIGS. 7 and 8, it is sandwiched between the half-split housing 6a and the front cover 7 so that the upper surface has a triangular shape and is behind the movable blade 61. A rear wall portion 18 in the left-right direction as a rear portion to be located, and an upper portion formed along a triangular shape at the upper portion of the rear wall portion 18 and protruding forward from the rear wall portion 18 and located above the movable blade 61. An upper wall portion 19 and a horizontal partition portion 20 projecting inward on the right side of the rear wall portion 18 are provided. A through hole 21 through which a screw boss 22 (FIG. 9) provided in the half-split housing 6a for screwing the front cover 7 to the half-split housing 6a is formed in the lower portion of the rear wall portion 18, and a rear surface thereof is formed. The holding pieces 23, 23, ... Are projected from the above. An LED substrate 24 (FIGS. 6 and 9) with the LED 25 as a light source facing inward is held between the holding pieces 23, 23, and the half-split housing 6a in a space surrounded by the holding pieces 23, 23.

As shown in FIG. 9, the LED holder 17 has a rear wall portion 18 on the front side of the half-split housing 6a, and a screw boss 22 is passed through the through hole 21 and mounted on a lateral rib 26 provided in the half-split housing 6a. By assembling the front cover 7 in the placed state, the front cover 7 is sandwiched and fixed between the half-split housing 6a and the front cover 7. In this state, as shown in FIG. 10, the upper wall portion 19 is fitted into the front side notch 27 provided in the upper part of the front cover 7 to form a part of the front cover 7, and the partition portion 20 is formed. A part of the half-split housing 6a is formed by fitting into the inner notch 28 provided in the cut portion 10 on the upper surface of the half-split housing 6a.
In the state where the LED holder 17 is assembled in this way, as shown by diagonal lines in FIG. 10, the transparent rear wall portion 18, the upper wall portion 19, and the partition portion 20 appear on the outside of the main body portion 2, and the transparent rear wall portion 18 and the partition portion 20 appear on the outside of the main body portion 2 through these transparent portions. The movement of the cutting portion 10, particularly the movable blade 61, can be easily visually recognized from the outside. Further, since the cut portion 10 can be illuminated by the light emission of the LED 25, visibility can be ensured even when working in a dark place.

On the other hand, as shown in FIG. 4, a switch 29 on which the trigger 30 is projected is housed on the upper side of the handle portion 3, and a forward / reverse switching button 31 is provided on the upper side of the switch 29.
Further, a controller 32 made of a circuit board is housed inside the battery mounting portion 4, and a battery pack 34 serving as a power source can be slidly mounted from the front on a terminal block 33 provided below the controller 32. The circuit board of the controller 32 is a control circuit that transmits a control signal based on the rotation position information of the rotor 44 detected by the sensor circuit board provided at the end of the brushless motor 40, and a control signal received from this control circuit. A drive circuit that switches the current of the brushless motor 40 based on the above, and an auto stop circuit that cuts off the power supply to the brushless motor 40 so as not to over-discharge or over-current depending on the detection result of the state of the battery pack 34. It is installed.

Then, as shown in FIGS. 4 and 11, the brushless motor 40, the reduction mechanism 41, and the operation mechanism 42 are housed in the main body 2 in this order from the rear.
The brushless motor 40 has a stator 43 and a rotor 44 penetrating the stator 43, and is held in the main body 2 in a posture in which a rotating shaft 45 provided at the center of the rotor 44 faces forward. Centrifugal fans 46 are provided on the rotating shaft 45 on the rear side of the stator 43, and intake ports 47, 47 ... (FIGS. 1, 5, etc.) are provided on the left and right side surfaces of the main body 2 on the front side of the stator 43. Exhaust ports 48, 48 ... (FIGS. 1, 5 and the like) are formed on the outside of the centrifugal fan 46, respectively. A pinion 49 is fixed to the front end of the rotating shaft 45.

The speed reduction mechanism 41 is a planetary gear type in which carriers 51, 51, which hold the planetary gears 52, 52 are arranged in three stages in the axial direction in the gear housing 50 held in the main body 2, and is the first stage. The planetary gear 52 of the carrier 51 is meshed with the pinion 49 of the rotating shaft 45. An output gear 53 is integrally connected to the axis of the third-stage carrier 51. The output gear 53 is supported by the gear housing 50 at the rear end and by the support plate 54 fixed to the gear housing 50 from the front at the front end via bearings 55 and 55, respectively.

As shown in FIGS. It includes a return plate 64 supported by the moving body 62 and the swing shaft 63, and a cam 65 for opening and closing the movable blade 61.
The fixed blade 60 is fixed to the cutting portion 10 on the upper side of the upper surface of the main body portion 2 and below the right guard portion 11 in a posture in which the semicircular blade portion 60a faces inward.
The movable blade 61 is fixed to the upper rear surface of the rocking body 62 on the front side of the fixed blade 60 with the semicircular blade portion 61a facing inward.
The rocking body 62 is rotatably supported by a rocking shaft 63 which is supported in the front-rear direction by a gear housing 50 and a support plate 54 on the upper side of the output gear 53, and a cam roller 66 is located at the lower end on the left side of the rocking shaft 63. , Is rotatably fixed via the connecting shaft 67.

The return plate 64 is located on the front side of the rocking body 62, its upper portion is rotatably supported by the rocking shaft 63, and its left side is integrally fixed with the rocking body 62 by the connecting shaft 67. Further, a crescent-shaped cam hole 68 is formed in the lower portion of the return plate 64.
The cam 65 has a camshaft 69 that is supported and rotatable in the front-rear direction by a gear housing 50 and a support plate 54 below the output gear 53, and a large-diameter reduction gear 70 coupled to the camshaft 69 outputs. It meshes with the gear 53. The cam 65 is integrally formed at the front end of the cam shaft 69 in front of the support plate 54 at an eccentric position, and has a half-moon shape in front view having a cam surface 71 on the peripheral surface. A guide roller 72 that comes into contact with the inner surface of the cam hole 68 of the return plate 64 is provided.

In this operating mechanism 42, as shown in FIG. 6, when the movable blade 61 is separated from the fixed blade 60, the cam 65 is in the rotation position on the right side and the guide roller 72 is brought into contact with the straight portion of the cam hole 68. The rocking body 62 is held in the open position via the return plate 64. From here, when the cam 65 rotates forward in front view (rotates counterclockwise as seen in FIG. 6), the cam roller 66 rides on the cam surface 71 of the cam 65 and relatively rolls the arc portion of the cam surface 71. The rocking body 62 rotates counterclockwise around the rocking shaft 63 to perform a closing operation that brings the movable blade 61 closer to the fixed blade 60. When the cam roller 66 reaches the opposite side of the arc portion of the cam surface 71, the movable blade 61 overlaps the fixed blade 60 on the front side and intersects the blade portions 60a and 61a with each other, as shown in FIG. When the cam 65 continues to rotate from here, the guide roller 72 rolls in the cam hole 68 of the return plate 64, rotates the rocking body 62 clockwise via the return plate 64, and separates the movable blade 61 from the fixed blade 60. Let the open operation be performed.

A guide portion 75 for positioning all screw bolts is provided on the upper surface of the main body portion 2 and behind the cutting portion 10. As shown in FIGS. 1, 3 to 4, 10 and the like, the guide portion 75 includes a fixed guide plate 76 erected in the half-split housing 6b of the main body 2 behind the fixed blade 60, and the fixed guide plate 76. It is provided with a guide member 77 provided on the inside.
The fixed guide plate 76 is a wall body erected in the front-rear direction, and the front and rear inner surfaces thereof have a large-diameter all-screw bolt B1 set on the blade portion 60a of the fixed blade 60 as shown in FIG. The outer guide surfaces 78 and 78 are located on the rear extension of the inner surface on the right side of the blade portion 60a so that the side surfaces of all the screw bolts B1 come into contact with each other. Between the outer guide surfaces 78 and 78, there is a fitting portion 79 that is recessed to the right.

As shown in FIG. 4, the guide member 77 is rotatably supported by a shaft 81 in the front-rear direction in a housing portion 80 recessed on the upper surface of the main body portion 2 inside the fixed guide plate 76. At the eccentric position of the guide member 77 with respect to the center of rotation, a guide piece 82 whose front-rear position is aligned with the fitting portion 79 of the fixed guide plate 76 is projected, and the guide member 77 has an L-shaped cross section. There is. With the guide piece 82, on the outer surface of the guide member 77, a first guide surface 83 located on the inner surface of the guide piece 82, a second guide surface 84 orthogonal to the first guide surface 83, and a guide piece A third guide surface 85 located on the outer surface of 82 is formed.
In this guide member 77, as shown in FIG. 12A, the guide piece 82 projects upward from the accommodating portion 80 and is fitted into the fitting portion 79 of the fixed guide plate 76, and the first guide surface 83 moves up and down. The first guide posture in which the second guide surface 84 is exposed in the left-right direction and the guide piece 82 retracted into the accommodating portion 80 as shown in FIG. 12B, and both guide surfaces 83, Rotational operation is possible with the second guide posture in which the 84 is not exposed.

In the first guide posture, the guide piece 82 fitted to the fitting portion 79 projects upward from the fixed guide plate 76, and the first guide surface 83 and the second guide surface 84 are shown in FIG. As described above, in a state where the small-diameter all-screw bolt B2 is set on the blade portion 60a of the fixed blade 60, the small-diameter all-screw bolt B2 is located on the rear extension thereof so as to abut on the side surface and the lower surface of the all-screw bolt B2. The space between the first guide surface 83 and the second guide surface 84 has an R shape that matches the outer shape of all screw bolts B2.
On the other hand, in the second guide posture, the third guide surface 85 formed on the back side of the first guide surface 83 is continuous with the upper surface of the main body 2, and as shown in FIG. 13, a large-diameter full-threaded bolt. With B1 set, the third guide surface 85 is flush with the housing 6, and is located on the rear extension of the housing 6 so that the lower surface of all the screw bolts B1 is in contact with the housing 6.
As shown in FIG. 12, positioning recesses 86, 86 are formed on the front end surface of the guide member 77, and the first and first guide members 77 are formed on the inner surface of the front portion of the accommodating portion 80 in the main body portion 2. A positioning convex portion 87 that fits into the positioning recesses 86 and 86 in the guide posture of 2 to position the guide member 77 is provided.

In the all-screw cutter 1 configured as described above, first, when cutting the large-diameter all-screw bolt B1, the guide member 77 of the guide portion 75 is rotated to the second guide posture. Then, as described above, on the rear extension of the blade portion 60a of the fixed blade 60, the outer guide surfaces 78 and 78 of the fixed guide plate 76 and the third guide surface 85 (and the upper surface of the housing 6) of the guide member 77 are formed. Is located. Therefore, as shown in FIG. 13, the large-diameter all-screw bolt B1 can be positioned by applying it to the fixing blade 60, the fixing guide plate 76, and the guide member 77.
When the trigger 30 is pushed in this state, the switch 29 is turned on to drive the brushless motor 40, the rotating shaft 45 is rotated, and the output gear 53 is rotated via the reduction mechanism 41. As a result, the camshaft 69 rotates via the reduction gear 70, and the cam 65 rotates in the forward direction, thereby swinging the rocking body 62 and closing the movable blade 61 as described above. Therefore, the all-screw bolt B1 can be cut between the fixed blade 60 and the fixed blade 60. After that, the movable blade 61 opens as the cam 65 continues to rotate in the forward direction.

On the other hand, when cutting the small diameter all-screw bolt B2, the guide piece 82 is pulled out and the guide member 77 is rotated to the first guide posture. Then, the first guide surface 83 and the second guide surface 84 of the guide member 77 are exposed on the rear extension of the blade portion 60a of the fixed blade 60. Therefore, as shown in FIG. 14, the small-diameter full-threaded bolt B2 can be positioned by applying it to the fixing blade 60 and the guide piece 82 of the guide member 77.
When the trigger 30 is pushed in this state, the rocking body 62 swings and the movable blade 61 closes, and the full screw bolt B2 can be cut from the fixed blade 60. After that, the movable blade 61 opens as the cam 65 continues to rotate in the forward direction.
While the cutting work of all the screw bolts B1 and B2 is continued in this way, the cut portion 10 can be visually recognized from the outside of the left guard portion 12 by the transparent LED holder 17. Since the LED 25 lights up at the same time as the switch 29 is turned on, it can be easily visually recognized even in a dark place. Further, the centrifugal fan 46 rotates due to the rotation of the rotating shaft 45, sucks outside air from the intake port 47, passes it through the brushless motor 40, and discharges it from the exhaust port 48. As a result, the brushless motor 40 can be cooled.

As shown in FIG. 15, a cover 90 that is fitted from above to the right guard portion 11 and the left guard portion 12 to cover the cut portion 10 can be attached to the front upper portion of the main body portion 2. As shown in FIGS. 16 and 17, the cover 90 has a cap shape in which the upper surface is formed so as to match the upper portions of the left and right guard portions 11 and 12, the front and rear surfaces are flat surfaces, and the lower surface is open. The deep groove portion 91 corresponding to the large-diameter all-screw bolt B1 and the shallow groove portion 92 corresponding to the small-diameter all-screw bolt B2 are recessed in the vertical direction.
Here, when the all-screw cutter 1 is placed horizontally on a flat surface with the right side facing down for stationary cutting, if the cover 90 removed from the main body 2 is placed horizontally behind the all-screw cutter 1, the rear of the guide portion 75 All screw bolts B1 and B2 can be supported horizontally.

For example, in the case of stationary cutting of a large-diameter all-screw bolt B1, the cover 90 is fixed with the deep groove portion 91 facing up with the guide member 77 in the second guide posture as shown in FIGS. 18 and 19. If it is placed horizontally on the flat surface S so as to be located on the rear extension of the guide plate 76, all the screw bolts B1 can be laid between the outer guide surfaces 78 and 78 and the deep groove portion 91 to support them horizontally. Stable cutting work can be performed. When cutting the small-diameter all-screw bolt B2 in a stationary manner, the cover 90 is turned upside down with the guide member 77 in the first guide posture, and the cover 90 is placed horizontally on the flat surface S with the shallow groove portion 92 facing up. A full screw bolt B2 can be bridged between the 82 and the shallow groove portion 92 to support it horizontally. However, the deep groove portion 91 and the shallow groove portion 92 may be provided on a surface other than the front and rear surfaces of the cover 90, or may be provided side by side on the same surface instead of different surfaces.

As described above, according to the all-screw cutter 1 of the above-described form, the first 1st to which can be positioned corresponding to a plurality of all-screw bolts B1 and B2 having different diameters on the extension line of the cutting position by the fixed blade 60 and the movable blade 61. The guide member 77 having the third guide surfaces 83 to 85 is provided so that the first and second guide postures in which the positions of the guide surfaces 83 to 85 are different can be selected. By simply selecting the guide posture, the guide member 77 can be easily adjusted with one touch according to the diameters of all the screw bolts B1 and B2. Therefore, the operability is excellent.
In particular, here, the fixed blade 60 and the movable blade 61 project upward from the housing 6 accommodating the operating mechanism 42, and the guide member 77 includes a first guide surface 83 in the vertical direction that abuts on the side surface of the all-screw bolt B2. A second guide surface 84 in the left-right direction that abuts on the lower surface of all screw bolts B2 is provided, and the positions of the first and second guide surfaces 83 and 84 can be changed by selecting the first and second guide postures. Therefore, even a small-diameter full-threaded bolt B2 can be easily positioned by the guide member 77.

Further, since the positions of the first and second guide surfaces 83 and 84 can be changed at the same time by selecting the first and second guide postures of the guide member 77, the guide members 77 are adjusted to the diameters of all the screw bolts B1 and B2. The guide posture can be easily changed.
Further, since the first guide surface 83 and the second guide surface 84 are integrally formed, the guide member 77 having the two guide surfaces 83 and 84 can be easily formed.
In addition, the guide member 77 has an L-shaped cross section formed by orthogonally forming the first guide surface 83 and the second guide surface 84, and the first guide member 77 is rotated about the front-rear direction as an axis. Since the second guide posture can be selected, the guide posture can be easily selected by the rotation operation.

The guide member 77 has a first guide posture in which the first guide surface 83 and the second guide surface 84 are exposed so that all the screw bolts B2 having the first diameter can come into contact with each other, and the first guide surface. The 83 and the second guide surface 84 are retracted into the housing 6, and the newly exposed third guide surface 85 can be brought into contact with the all-screw bolt B1 having a second diameter larger than the first diameter. By being able to select between 2 guide postures, it is possible to easily position all screw bolts B1 and B2 having two types of diameters.
In particular, since the housing 6 is provided with the fixed guide plate 76 that allows the side surfaces of the all-screw bolts B1 to come into contact with each other in the second guide posture of the guide member 77, the all-screw bolts B1 can be reliably positioned.

In the invention relating to the guide member, in the above embodiment, the first guide surface and the second guide surface of the guide member are formed orthogonally, but the guide surface is not limited to this shape, for example, all screw bolts. It may be U-shaped or semi-circular along the outer shape of. As for the number of guide surfaces, for example, by increasing the number of guide pieces by changing the phase, a guide surface is formed between the guide pieces, and the guide members are rotated to guide the guides according to the diameters of all three or more screw bolts. It is also possible to select the posture.
In addition, the guide member is not limited to the rotation operation, and the guide posture can be selected according to the diameter of all screw bolts by sliding the rod-shaped guide member in which a plurality of guide surfaces are arranged side by side on a straight line or a curved line in the left-right direction. It is also possible to make it possible.
Further, the position of the guide portion is not limited to the upper surface of the housing, and the present invention can be applied to the side surface or the front surface, and the fixed guide plate can be omitted.

On the other hand, according to the all-screw cutter 1 of the above-described embodiment, the housing 6 is formed with a left guard portion 12 that partially covers the outside of the movable blade 61, and an upper portion (LED holder 17) of the movable blade 61 in the left guard portion 12. Since the upper wall portion 19) is transparent, the cut portion 10 is easily visible and the position of the movable blade 61 is easy to understand.
In particular, here, since the rear portion (rear wall portion 18) of the movable blade 61 in the left guard portion 12 is also transparent, the position of the movable blade 61 can be more easily understood from above.
Further, since the transparent upper wall portion 19 and the rear wall portion 18 in the left guard portion 12 are continuous, the transparent portion appears integrally and the visibility is further improved.

Further, since the transparent upper wall portion 19 and the rear wall portion 18 of the left guard portion 12 are integrally formed, the transparent portion can be easily formed.
In addition, an LED 25 that emits light when the movable blade 61 is operated is provided in the vicinity of the movable blade 61, and the LED holder 17 in the left guard portion 12 emits light due to the light emission of the LED 25, so that the cutting portion 10 and the cutting portion 10 and the light are emitted even in a dark place. The visibility of the movable blade 61 can be ensured.
Then, the LED 25 emits light toward the movable blade 61, and the left guard portion 12 is provided with a partition portion 20 extending between the LED 25 and the movable blade 61 to prevent foreign matter from entering the housing 6. ..

In the invention relating to the transparency of the guard portion, in the above embodiment, the entire LED holder is transparent, but only a part of the rear wall portion and the upper wall portion may be transparent, or only the upper wall portion is transparent. May be. In this case, instead of integrally molding, the transparent portions of the rear wall portion, the upper wall portion, and the partition portion may be formed separately and joined to the non-transparent portion.
Further, the light source such as an LED may be provided at a different place, or the light source may be omitted.
Further, although the transparent portion is formed on the left guard portion in the above embodiment, the transparent portion may be formed on the right guard portion as well.

In addition, in common with each invention, the motor is not limited to the brushless motor, but may be a commutator motor or an outer rotor type, and is not limited to a DC cutting machine using a battery pack as a power source, and an AC cutting machine provided with a power cord. It may be. The object to be cut is not limited to all screw bolts, but also includes bars such as reinforcing bars and wires. As for the structure of the cutting blade, the fixed blade and the movable blade may be reversed left and right, or both blades may be movable blades.

1 ・ ・ All screw cutter, 2 ・ ・ Main body part, 3 ・ ・ Handle part, 6 ・ ・ Housing, 6a, 6b ・ ・ Half-split housing, 7 ・ ・ Front cover, 10 ・ ・ Cutting part, 11 ・ ・ Right guard part , 12 ... left guard part, 17 ... LED holder, 18 ... rear wall part, 19 ... upper wall part, 20 ... partition part, 25 ... LED, 29 ... switch, 32 ... controller, 34・ ・ Battery pack, 40 ・ ・ Brushless motor, 41 ・ ・ Reduction mechanism, 42 ・ ・ Actuating mechanism, 45 ・ ・ Rotating shaft, 53 ・ ・ Output gear, 60 ・ ・ Fixed blade, 60a ・ ・ Blade part, 61 ・ ・Movable blade, 61a ... Blade part, 62 ... Swing body, 63 ... Swing shaft, 64 ... Return plate, 65 ... Cam, 68 ... Cam hole, 71 ... Cam surface, 75 ... Guide part , 76 ... fixed guide plate, 77 ... guide member, 78 ... outer guide surface, 80 ... accommodating part, 81 ... shaft, 82 ... guide piece, 83 ... first guide surface, 84 ... 2nd guide surface, 85 ... 3rd guide surface, 90 ... cover.

Claims (4)

A pair of cutting blades, which are housed in the housing in the order of a motor, a reduction mechanism, and an actuating mechanism from the rear, and shearing around an actuating shaft in the front-rear direction by the actuating mechanism, protrude upward on the upper front portion of the housing. A bar cutting machine capable of shearing a bar provided and positioned in the front-rear direction on the upper surface of the housing by the pair of cutting blades.
The housing is divided into front and rear at the position of the operating mechanism, and is formed by assembling a rear housing portion for accommodating the motor and the reduction mechanism and a front cover for covering the operating mechanism from the front.
A left guard portion and a right guard portion that partially cover the outside of the cutting blade from the left and right are formed on the upper portion of the housing, and at least a part of the upper portion of the cutting blade in the left guard portion is transparent. Oh it is,
A light source that emits light toward the cutting blade when the cutting blade is operated is provided in the vicinity of the cutting blade, and the light emission of the light source causes at least a transparent portion in the upper portion of the cutting blade to emit light.
The guard portion provided with the transparent portion is provided with a transparent partition portion extending between the light source and the cutting blade.
The partition portion is arranged between the left side guard portion and the right side guard portion to be formed in a flat plate shape that does not project upward, and is arranged between the rear housing portion and the front cover. A bar cutting machine featuring. The bar cutting machine according to claim 1 , wherein the guard portion provided with the transparent portion is provided with a holding portion for the light source. The bar cutting machine according to claim 2, wherein the partition portion and the holding portion of the light source project rearward. The bar cutting machine according to any one of claims 1 to 3, wherein the upper portion and the partition portion of the guard portion provided with the transparent portion are integrally formed.

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