JP7419727B2 - driving machine - Google Patents

Description

The present invention relates to a driving machine that has a magazine that accommodates fasteners and a striking section that strikes the fasteners fed from the magazine.

An example of a driving machine having a magazine that accommodates nails as a fastener and a driver blade as a striking part that strikes the nail is described in Patent Document 1. The nail driving machine described in Patent Document 1 includes a nail driving machine main body, a driver blade, a blade guide, a magazine, a pressure accumulation chamber, and a trigger. The driver blade is supported by the nailer body. A piston is fixed to the driver blade. The blade guide is provided in the nailer body. A driving path is provided in the blade guide. The magazine is connected to the blade guide. The magazine has a magazine body, a first cover, and a second cover. The first cover is made of light metal, and a window is provided in the first cover. The second cover is made of plastic and is transparent. Nails are stored in the magazine and are fed to a driving path by a feeder. The pressure accumulation chamber is provided within the nail gun main body. The trigger is attached to the nail gun body.

When the trigger is operated, the piston is actuated by the air pressure in the pressure accumulator, the driver blade is actuated within the driving path, and the driver blade strikes the nail. The user can visually check the remaining amount of nails in the magazine from outside the magazine through the window and the second cover. Further, since the second cover is provided, it is possible to prevent dust and the like from entering through the window. Note that a nailing machine in which a window is provided in the magazine cover is also described in Patent Document 2.

Japanese Patent Application Publication No. 2006-986 Utility Model Publication No. 6-50768

The inventor of the present invention recognized the problem that if a special part is provided to prevent foreign matter from entering the magazine, the number of parts will increase.

SUMMARY OF THE INVENTION An object of the present invention is to provide a driving machine that can prevent foreign matter from entering a magazine and also prevent an increase in the number of parts.

In one embodiment, the driving machine includes a magazine that stores fasteners, an injection section through which the fasteners are sent from the magazine, and an operable to drive the fasteners sent to the injection section into a mating material. A driving machine having a striking unit, wherein the magazine includes a storage chamber that accommodates the fastener, a cover that covers the storage chamber, and a window provided in the cover. a sheet member on which information is written and attached to the cover so as to cover the window portion; and a sheet member provided on the sheet member and allowing a user to visually see the storage chamber from outside the magazine through the window portion. It has a transparent part.

According to the driving machine of one embodiment, the sheet member attached to the cover suppresses foreign matter from entering the magazine. Since the sheet member is not a dedicated element for preventing foreign matter from entering the magazine, an increase in the number of parts can be suppressed.

FIG. 1 is a front view showing an embodiment of the driving machine of the present invention. FIG. 2 is a partially cutaway front view of a magazine provided in the driving machine. This is a specific example of a magazine, and is a left side sectional view taken along line III-III in FIG. 1. FIG. 3 is an enlarged front view of a part of the magazine. 4 is a front view showing a label attached to the magazine of FIG. 3. FIG. FIG. 7 is a left side sectional view showing another specific example of the magazine. 7 is a front view showing a label attached to the magazine of FIG. 6. FIG.

An embodiment of the driving machine of the present invention will be described with reference to the drawings. In each figure, similar components are designated by the same reference numerals. The magazine of the driving machine is configured to arrange the fasteners in a row and feed them in a straight line. The user can visually check the remaining amount of the fastener from outside the magazine. Furthermore, the sheet member attached to the cover is not a dedicated element for preventing foreign matter from entering the magazine.

The driving machine 10 shown in FIG. 1 includes a housing 11, a striking section 12, a magazine 13, an electric motor 14, a conversion mechanism 15, a control section 16, a battery pack 17, and an injection section 23. The housing 11 includes a cylindrical main body 19 , a handle 20 connected to the main body 19 , and a motor case 21 connected to the main body 19 . The user grasps the handle 20 with his/her hand. A mounting portion 22 is connected to the handle 20 and the motor case 21.

The striking portion 12 includes a slider 26 disposed within the main body portion 19 and a driver blade 27 fixed to the slider 26. A guide shaft is provided within the main body portion 19. The slider 26 is mounted for movement relative to the guide shaft. Therefore, the striking portion 12 can reciprocate in the direction along the imaginary line A1. The imaginary line A1 is an engineering straight line located within the main body portion 19.

The injection part 23 is provided outside the main body part 19 , and the injection part 23 is fixed to the main body part 19 . The injection part 23 can be defined as a nose part. The injection part 23 is made of metal, for example, and has an injection path 24 shown in FIG. 2. The injection path 24 may be a passage, a hole, or a space. The fasteners are fed from the magazine 13 to the injection path 24. When the striking part 12 is actuated, the driver blade 27 is movable in the injection path 24. The injection path 24 guides the attitude of the driver blade 27 and guides the driving direction of the fastener sent from the magazine 13. A push lever 74 is attached to the injection section 23. The push lever 74 can move and stop relative to the injection section 23 in a direction along the imaginary line A1. The push lever 74 is capable of contacting and separating from the mating member W1.

A metal spring 51 is provided within the main body portion 19. The slider 26 is biased by the biasing force of the spring 51 in a direction along the imaginary line A1 toward the injection portion 23, that is, in a first direction. A bumper is provided within the body portion 19, and when the slider 26 operating in the first orientation collides with the bumper, the striking portion 12 is stopped. The position of the striking portion 12 when the slider 26 is in contact with the bumper is the bottom dead center.

The battery pack 17 can be attached to and removed from the mounting portion 22. The battery pack 17 is an example of a power source for applying voltage to the electric motor. The battery pack 17 includes a housing case 52 and a plurality of battery cells housed within the housing case 52. The battery cell is a secondary battery that can be charged and discharged, and any one of a lithium ion battery, a nickel metal hydride battery, a lithium ion polymer battery, and a nickel cadmium battery can be used as the battery cell.

The control section 16 shown in FIG. 1 is provided within the mounting section 22, and the control section 16 is a microcomputer having an input port, an output port, an arithmetic processing section, and a storage section. The control unit 16 indirectly controls rotation and stopping of the electric motor 14. A trigger 53 and a trigger switch shown in FIG. 1 are provided on the handle 20. When the user applies operating force to the trigger 53, the trigger switch is turned on. When the user releases the operating force applied to the trigger 53, the trigger switch is turned off. An inverter circuit is provided within the motor case 21. The inverter circuit includes a plurality of switching elements that can be turned on and off.

A position detection sensor is provided within the motor case 21. The position detection sensor estimates the position of the slider 26 in the direction along the virtual line A1 based on, for example, the rotation angle of the electric motor 14, and outputs a signal. A push lever switch is provided in the injection section 23. The push lever switch detects whether the push lever 74 is pressed against or separated from the mating member W1 and outputs a signal. The control unit 16 processes the trigger switch signal, the push lever switch signal, and the position detection sensor signal, and also controls the inverter circuit.

An electric motor 14 and a reduction gear 28 are provided within the motor case 21. The electric motor 14 and the speed reducer 28 are arranged concentrically around the virtual line A2. The virtual line A2 is an engineering straight line shown for convenience. The virtual line A2 is located inside the motor case 21. When the driving machine 10 is viewed from the front as shown in FIG. 1, the imaginary line A2 intersects with the imaginary line A1. The electric motor 14 rotates when voltage is applied from the battery pack 17. The rotational force of electric motor 14 is transmitted to reduction gear 28 . The speed reducer 28 reduces the rotational speed of the output element relative to the rotational speed of the input element.

A conversion mechanism 15 is provided within the housing. The conversion mechanism 15 converts the rotational force of the output element of the reduction gear 28 into the actuation force of the slider 26. The conversion mechanism 15 includes a rotating element and a pin provided on the rotating element. When the pin is engaged with the slider 26, the rotational force of the rotating element is transmitted to the slider 26. When the rotational force of the rotating element is transmitted to the slider 26, the slider 26 can be operated in a direction away from the injection portion 23, that is, in a second direction, against the biasing force of the spring 51. When the pin is released from the slider 26, no rotational force of the rotating element is transmitted to the slider 26. If the rotational force of the rotating element is not transmitted to the slider 26, the slider 26 can be operated in the first direction by the biasing force of the spring 51.

Magazine 13 is supported by motor case 21 and injection section 23. The magazine 13 can accommodate a plurality of nails 25 arranged in a row. Adjacent nails 25 are connected with adhesive. A feeder 29 is provided in the magazine 13. The feeder 29 feeds the nails 25 housed in the magazine 13 to the injection path 24 in the feeding direction B1.

Next, an example of how the driving machine 10 is used will be explained. The control unit 16 stops supplying power to the electric motor 14 when at least one of the trigger switch and the push lever switch is off. When the electric motor 14 is stopped, the striking part 12 is stopped at the bottom dead center. When the striking part 12 is stopped at the bottom dead center, the nail 25 located at the head in the feeding direction B1 is in contact with the driver blade 27 and stopped outside the injection path 24.

When the user applies operating force to the trigger 53 to turn on the trigger switch and presses the tip of the push lever 74 against the mating member W1, the push lever switch is turned on. Then, the control unit 16 rotates the electric motor 14. The rotational force of the electric motor 14 is amplified by the reduction gear 28 and transmitted to the conversion mechanism 15. When the rotational force of the conversion mechanism 15 is transmitted to the slider 26, the striking portion 12 operates in the second direction, that is, rises. When the driver blade 27 retreats from the injection path 24, the nail 25 located at the head in the feeding direction B1 is fed to the injection path 24 by the feeder 29 and stopped.

When the rotational force of the conversion mechanism 15 is no longer transmitted to the slider 26, the striking portion 12 operates in the first direction, that is, moves downward. The position of the striking portion 12 at the time when the rotational force of the conversion mechanism 15 is no longer transmitted to the slider 26 is the top dead center. When the striking part 12 descends from the top dead center, the driver blade 27 strikes the nail 25 located in the injection path 24. The nail 25 that has been hit is driven into the mating material W1.

The control unit 16 stops the electric motor 14 from the time the slider 26 starts descending until the slider 26 collides with the bumper. Therefore, the slider 26 comes into contact with the bumper, and the striking portion 12 stops at the bottom dead center.

The magazine 13 in this embodiment is configured as follows. The magazine 13 has a main body 30 and a cover 31, as shown in FIGS. 2 and 3. The main body 30 is made of metal and is fixed to the motor case 21 and the injection part 23. The main body 30 is a band-shaped member arranged along the imaginary line A2. The main body 30 has two guide grooves 32. The two guide grooves 32 are arranged at intervals in the direction along the virtual line A1. The two guide grooves 32 are parallel and arranged along the virtual line B2. The imaginary line B2 is an engineering straight line shown for convenience, and the imaginary line B2 is located within the magazine 13. Virtual line B2 is parallel to virtual line A2. In the direction along the imaginary line A1, the imaginary line A2 and the imaginary line B2 are spaced apart from each other.

The cover 31 can be attached to and removed from the main body 30. The cover 31 is made of an opaque material, for example an aluminum alloy. The cover 31 has two rails 33, and the two rails 33 are parallel. The rails 33 are individually arranged in the guide grooves 32, respectively. When the cover 31 is attached to the main body 30, a grip 34 is fixed to the end farthest from the injection part 23. When the cover 31 is attached to the main body 30, the user can move the cover 31 along the guide groove 32 by grasping the grip 34 and applying operating force. A lever is provided on the cover 31, and the user can operate the lever to switch between a state in which the cover 31 is movable relative to the main body 30 and a state in which the cover 31 is fixed to the main body 30.

In a state where the cover 31 is attached to the main body 30, a storage chamber 35 is provided between the main body 30 and the cover 31. The accommodation chamber 35 is a space having a length in the direction along the virtual line B2. The cover 31 covers the storage chamber 35. The nails 25 are housed in the housing chamber 35 in a line along the imaginary line B2. The feeder 29 is arranged in the storage chamber 35 and has a plate shape. The feeder 29 may be made of metal, synthetic resin, or metal whose surface is coated with synthetic resin. The feeder 29 is movable within the storage chamber 35 in a direction along the imaginary line B2. The feeder 29 contacts the nail 25 located at the rearmost position in the feeding direction B1 among the nails 25 arranged in the storage chamber 35. The feeding direction B1 is along the virtual line B2 and is a direction toward the injection section 23.

A feeder piece 36 is provided on the feeder 29. The feeder piece 36 and the feeder 29 are separate members. The feeder piece 36 is made of synthetic resin, for example, and has a cylindrical shape. The cover 31 has a guide groove 37, and the feeder piece 36 is movable within the guide groove 37 in a direction along the imaginary line B2. A connecting piece 38 connects the feeder 29 and the feeder piece 36. Therefore, the feeder 29 and the feeder piece 36 can move together in the direction along the imaginary line B2.

A metal spring 39 is provided in the guide groove 37. Spring 39 is in contact with feeder piece 36 and grip 34. The biasing force of the spring 39 is transmitted to the feeder 29 via the feeder piece 36. The feeder 29 is biased in the feeding direction B1 approaching the injection path 24 and is pressed against the nail 25.

A window portion 40 is provided in the cover 31. The window portion 40 is for a user to visually observe the inside of the magazine 13 from the outside of the magazine 13. The window portion 40 passes through the cover 31. The window portion 40 is provided in a predetermined range in the direction of the virtual line B2. The predetermined range is a range within which the nail 25 can be accommodated in the direction of the imaginary line B2. The width of the window portion 40 in the direction intersecting the virtual line B2 is, for example, 5 mm or less. The window portion 40 can be defined as a hole or a slit arranged along the virtual line B2. A label 41 shown in FIGS. 3 and 4 is attached to the surface of the cover 31 at a portion exposed to the outside of the magazine 13. As shown in FIGS. The label 41 has a function of notifying the user of information. It is made of a material whose hardness is lower than that of the cover 31. The label 41 is, for example, a sheet member made of thermoplastic, specifically polycarbonate.

When the label 41 is viewed from the front as shown in FIG. 5, the outer peripheral shape of the label 41 is approximately rectangular. The label 41 includes a see-through portion 42 , a plurality of marking portions 43 , 44 , 45 , a remaining amount display portion 46 , and a colored portion 47 . A plurality of marking sections 43 , 44 , 45 , a remaining amount display section 46 , and a colored section 47 are provided on the surface of the label 41 . The user can visually check the plurality of notation parts 43, 44, and 45. Information to be notified to the user is printed in characters or symbols on the plurality of notation parts 43, 44, and 45. In the notation section 43, for example, the product number of the driving machine 10, the length of the nail 25 that can be accommodated in the magazine 13, etc. are written. In the notation section 44, for example, characteristics, selling points, etc. of the driving machine 10 are written. In the notation section 45, for example, precautions for use of the driving machine 10 are written.

The see-through portion 42 has transparency that allows the user to see through the window portion 40 and the storage chamber 35 from outside the magazine 13 . The outer edge of the transparent portion 42 is provided outside the outer edge of the window portion 40. In the direction along the virtual line B2, the length of the transparent portion 42 exceeds the length of the window portion 40. In the direction intersecting the virtual line B2, the width of the transparent portion 42 exceeds the width of the window portion 40. The transparent portion 42 is arranged in a band shape in the direction along the virtual line B2.

The remaining amount display section 46 is provided between the see-through section 42 and the notation section 43. The remaining amount display section 46 indicates the remaining amount of the nail 25 in numbers. The remaining amount display section 46 shown in FIG. 5 is an example in which three locations are provided at intervals for every 10 batteries.

The colored part 47 is provided between the transparent part 42 and the notation part 45. The transparency of the colored portion 47 is lower than the transparency of the see-through portion 42 . The colored portion 47 does not require transparent viewing by the user. The color of the colored portion 47 is different from the color of the feeder piece 36. For example, the color of the colored portion 47 can be opposite to the color of the feeder piece 36. In other words, the color of the colored portion 47 is a color located exactly opposite to the color of the feeder piece 36 on the color wheel. Further, it is also possible to make the color of the colored portion 47 a gradation that continuously changes with respect to a change in position in the direction along the virtual line B2.

As shown in FIG. 3, an adhesive layer 48 is provided on the back side of the label 41. An adhesive layer 48 is adhered to the surface of the cover 31, so that the label 41 is fixed, that is, pasted, to the cover 31. The adhesive layer 48 is provided at a location other than the transparent portion 42 . The adhesive may be acrylic, rubber, silicone, or the like. Further, the adhesive may be either a permanent adhesive type or a removable type. Note that the adhesive may be used as long as it can fix the label 41 to the cover 31, and includes an adhesive.

The user can visually view the feeder piece 36 and the storage chamber 35 from outside the magazine 13 through the transparent section 42 and window section 40 of the label 41. Therefore, the position of the feeder piece 36 in the direction along the virtual line B2 can be visually observed. The remaining amount of nails 25 in the magazine 13 can be indirectly recognized based on the position of the feeder piece 36 and the remaining amount display section 46. Note that it is also possible to recognize the remaining amount of nails 25 in the magazine 13 by directly observing the nails 25 visually.

Further, the label 41 closes the window portion 40. Therefore, foreign matter outside the magazine 13 can be prevented from entering the storage chamber 35 through the window portion 40. Further, the label 41 is an element attached to the cover 31 to notify the user of information. In other words, the label 41 is not a dedicated sealing member for closing the window portion 40. In other words, the label 41 has both an information notification function and a sealing member function. Therefore, it is possible to suppress an increase in the number of parts of the driving machine 10, and it is possible to suppress an increase in the manufacturing cost of the driving machine 10. Furthermore, since the label 41 is made of a resin film, an increase in the weight of the driving machine 10 can be suppressed.

Further, when the label 41 is viewed from the front as shown in FIG. 5, the adhesive layer 48 is provided at a location other than the location corresponding to the window portion 40 and the see-through portion 42. Therefore, it is possible to prevent the user's field of view from being blocked by the adhesive layer 48. Furthermore, since the label 41 is provided with the colored portion 47, the visibility of the position of the feeder piece 36 in the direction along the virtual line B2 is improved. Further, if the see-through portion 42 becomes dirty and its transparency decreases, the label 41 may be peeled off and a new label 41 may be attached to the cover 31.

Further, the transparent portion 42 is set to have higher transparency as it approaches the injection portion 23 in the direction along the virtual line B2. The transparency of the see-through portion 42 may change stepwise or steplessly. Therefore, the visibility improves as the remaining amount of nails 25 decreases.

Another example of the magazine 13 is shown in FIG. The cover 31 is provided with a recess 49 that is recessed from the surface to which the label 41 is attached. The recess 49 is provided surrounding the outer edge of the window 40, as shown in FIG. A transparent film 50 is provided in the recess 49. The film 50 is made of a translucent material, such as synthetic resin, and the hardness of the film 50 is higher than that of the label 41. The film 50 covers the window section 40. The film 50 may be fixed to the cover 31 with an adhesive, or may not be fixed to the cover 31. The user can visually view the feeder piece 36 and the storage chamber 35 from outside the magazine 13 through the transparent section 42, the film 50, and the window section 40.

Furthermore, the entire label 41 shown in FIGS. 5 and 7 may have luminous properties. Further, a portion of the label 41, for example, the colored portion 47 may have luminous properties. Furthermore, all or the surface of the feeder piece 36 may have luminous properties. For example, the label 41, colored portion 47, and feeder piece 36 may be made of luminescent material. Luminous materials have the ability to store and re-emit light energy. The phosphorescent material may be either a phosphorescent paint or a phosphorescent tape. When at least one of the label 41, the colored part 47, and the feeder piece 36 emits light, visibility for the user is improved.

Furthermore, if the area of the transparent portion 42 is set so that the outer edge of the transparent portion 42 is located outside the outer edge of the window portion 40, the position at which the label 41 is pasted on the cover 31 may shift. Also, the user can visually see the window portion 40 through the see-through portion 42 .

Furthermore, the cover 31 has a recess 49 , and the film 50 is placed in the recess 49 . Therefore, the film 50 can be prevented from protruding from the surface of the cover 31. Therefore, when attaching the label 41 to the surface of the cover 31, the label 41 can be prevented from rising from the surface of the cover 31.

Furthermore, the color of the colored portion 47 is different from the color of the feeder piece 36. In particular, when the color of the colored portion 47 is opposite to the color of the feeder piece 36, visibility for the user is improved. Furthermore, when the color of the colored portion 47 is a gradation that continuously changes with respect to a change in position in the direction along the virtual line B2, visibility for the user is improved.

An example of the technical meaning of the matters disclosed in the embodiments is as follows. The label 41 is an example of a sheet member. Nail 25 is an example of a fastener. The film 50 is an example of a see-through film. The remaining amount display section 46 is an example of a scale. The feeder 29, feeder piece 36, and spring 39 are an example of a feeding mechanism.

The driving machine is not limited to the embodiments disclosed using the drawings, and can be modified in various ways without departing from the spirit thereof. For example, the length of the window and the transparent portion in the fastener feeding direction, and the width of the window and transparent portion in the direction crossing the fastener feeding direction can be set arbitrarily. Further, the sheet member may be a label, film, sticker, or sticker. The material of the sheet member may be either synthetic resin or metal. Further, in addition to a structure in which the main body of the magazine and the ejection part are made of separate members and the main body is fixed to the ejection part, a structure in which the main body of the magazine and the ejection part are made of the same member and integrated is also possible. .

The first biasing mechanism that operates the striking portion in the first direction may use a gas spring or a magnet instead of a metal spring. The magnet may be either a permanent magnet or an electromagnet. When the striking part is made of a magnetic material, for example iron, the striking part is moved by the magnetic attraction force of the magnet. Further, the power source that applies voltage to the electric motor may be either a DC power source or an AC power source.

Further, the first biasing mechanism may include a pressure accumulation chamber provided in the housing, a pressure chamber that applies air pressure to the striking portion, and a path for supplying compressed air from the pressure accumulation chamber to the pressure chamber. Then, compressed air is supplied from the outside of the housing to the pressure accumulation chamber via the air hose, and when operating force is applied to the trigger, the compressed air in the pressure accumulation chamber is sent to the pressure chamber through the path, and the striking part It operates in the direction of Furthermore, when the first biasing mechanism is a pressure chamber, the second biasing mechanism that biases the striking part in the second direction is a return chamber that moves the striking part in the second direction by the pressure of compressed air. It is.

A metal spring can be used as the biasing member that forms part of the feeding mechanism. The metal spring may be either a compression spring or a tension spring. The feeding mechanism may be partially or entirely made of colored or luminescent material. For example, it is also possible for the feeder to be colored or made of luminescent material. Furthermore, the remaining amount of the fastener can be recognized by the position of the feeder and the remaining amount display section.

The fastener may be a shaft-shaped nail, a plate-shaped nail, a nail with a head, a nail without a head, an arch-shaped tacker, a stud, or the like. The nail may be either a fixing nail with one head or a temporary fixing nail with two heads.

DESCRIPTION OF SYMBOLS 10... Driving machine, 12... Impact part, 13... Magazine, 23... Injection part, 25... Nail, 29... Feeder, 31... Cover, 35... Accommodation chamber, 36... Feeder piece, 39... Spring, 40... Window part , 41... Label, 42... Transparent part, 46... Remaining amount display part, 47... Colored part, 48... Adhesive layer, 50... Film

Claims (9)

a magazine that accommodates the fastener;
an ejection part through which the fastener is fed from the magazine;
a striking part operable to drive the fastener sent to the injection part into a mating material;
A driving machine having:
The magazine is
a storage chamber that accommodates the fastener;
a cover that covers the storage chamber;
a window provided in the cover;
a sheet member on which information to be notified to the user is written and attached to the cover so as to cover at least a part of the surface of the window and the cover surrounding the window ;
At least a portion of the sheet member in a range that covers the window portion is a see-through portion having transparency that allows the sheet member to be seen through,
A driving machine in which a user can visually observe the storage chamber from outside the magazine through the window portion and the see-through portion of the sheet member. A see-through film is further provided between the cover and the sheet member, and is arranged so as to overlap the window portion and the see-through portion of the sheet member,
The driving machine according to claim 1, wherein the hardness of the transparent film is higher than the hardness of the sheet member. The driving device according to claim 1 or 2, wherein the information to be notified to the user of the sheet member is written near the transparent portion and has a scale indicating the number of the fasteners accommodated in the storage chamber. Insertion machine. An adhesive layer for fixing the sheet member to the cover is further provided between the sheet member and the cover,
4. The driving machine according to claim 1, wherein the adhesive layer is provided at a location other than the location corresponding to the window. The magazine has a feeding mechanism that sends the fastener accommodated in the storage chamber to the injection section,
The driving machine according to any one of claims 1 to 4, wherein the transparency of the transparent portion is higher as the fastener is closer to the injection portion in a direction in which the fastener is sent to the injection portion. The driving machine according to any one of claims 1 to 5, wherein the sheet member has luminous properties. The driving machine according to any one of claims 1 to 6, wherein the feeding mechanism has luminous properties. The sheet member has a colored part having lower transparency than the transparent part,
The driving machine according to any one of claims 1 to 7, wherein the color of the colored portion and the color of the feeding mechanism are different. The driving machine according to any one of claims 1 to 8, wherein the cover is made of an aluminum alloy.

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