Inserting machine

Abstract

Provided is a driving machine that can suppress contact between the machine head and a fixing member by the reaction generated when a striking portion strikes the fixing member. The driving machine (10) includes: a main body; a striking portion movably supported by the main body; a handle (20) protruding from the main body; and a machine head (13) attached to the main body and holding a nail (78) before being struck by the striking portion. The machine head (13) has: a shooting path (97) that movably houses the striking portion and guides the nail (78); and a shooting outlet connected to the shooting path (97) and used for driving out the nail (78). An opening (98) extending from the shooting outlet toward the handle (20) is provided on the handle (20) side of the shooting path (97). When viewed from above along a straight line movement direction perpendicular to the striking portion, the width of the opening (98) is larger than the outer diameter of the head of the nail (78).

Description

Technical Field

[0001] The present invention relates to a driving machine having: a machine head portion supplied with a fixing member; and a striking portion capable of striking the fixing member. Background Art

[0002] Patent Document 1 describes an example of a nail driving machine having a machine head portion for supplying nails and a driving machine blade capable of striking the nails. The nail driving machine described in Patent Document 1 has a main body, a pressure accumulating chamber, a driving machine blade, a trigger, a push rod, a machine head portion, and a nail magazine. The pressure accumulating chamber is provided in the handle. An air hose is connected to the handle, and compressed air is supplied from the air hose to the pressure accumulating chamber. The machine head portion is attached to the main body, and the machine head portion has a shooting path.

[0003] The nail magazine is attached to the machine head portion, and nails are stored in the nail magazine. A nail feeder is provided in the nail magazine. The nail feeder conveys the nails stored in the nail magazine to the shooting path. The operator operates the trigger and presses the push rod against the wood. Then, the driving machine blade operates under the air pressure in the pressure accumulating chamber and drives the nails in the shooting path into the wood.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent No. 4618537 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] When the driving machine blade strikes the nail, the reaction force is transmitted to the machine head portion. The inventors of the present application have recognized the following problem: when the nail is not completely driven into the wood, if the machine head portion receives the reaction force, the machine head portion may come into contact with the nail.

[0009] An object of the present invention is to provide a driving machine capable of suppressing contact between the machine head portion and the fixing member by the reaction force generated when the fixing member is struck by the striking portion.

[0010] Means for Solving the Problems

[0011] A driving machine according to an embodiment includes: a main body; a striking portion movably supported by the main body; a handle protruding from the main body; and a machine head mounted on the main body and holding a fixing member before being struck by the striking portion. The machine head has: a shooting path movably accommodating the striking portion and guiding the fixing member; and a shooting outlet provided in the shooting path and for shooting out the fixing member. An opening portion extending from the shooting outlet toward the handle is provided on the handle side of the shooting path. When viewed from above in a direction perpendicular to the linear movement direction of the striking portion, the width of the opening portion is larger than the outer diameter of the head of the fixing member.

[0012] Effect of the Invention

[0013] The driving machine according to one embodiment can suppress contact between the machine head and the fixing member by the reaction generated when the fixing member is struck by the striking portion. Description of the Drawings

[0014] Figure 1 It is a front view showing a driving machine according to an embodiment of the present invention.

[0015] Figure 2 It is a top view showing the driving machine.

[0016] Figure 3 It is a side cross-sectional view of the driving machine taken along line III-III Figure 1 as shown.

[0017] Figure 4 It is Figure 3 a partial side cross-sectional view of the driving machine as shown.

[0018] Figure 5 It is a side cross-sectional view of the driving machine and a nail box taken along line V-V Figure 2 as shown.

[0019] Figure 6 It is to Figure 5 enlarge the front end of the machine head as shown and is a side cross-sectional view.

[0020] Figure 7 It is Figure 4 a bottom view of the machine head and the nail box as shown.

[0021] Figure 8 It is a top cross-sectional view of the driving machine taken along line VIII-VIII Figure 5 as shown.

[0022] Figure 9 It is a top cross-sectional view of the driving machine taken along line IX-IX Figure 5 as shown.

[0023] Figure 10 It is a top view cross-sectional view of the nail driver shown, cut along the X-X line. Figure 5

[0024] Figure 11 It is a side cross-sectional view showing an example of the movement of the machine head under the reaction generated by the impact of the nail on the blade of the nail driver.

[0025] Figure 12 It is a block diagram showing the control system of the nail driver.

[0026] Figure 13 It shows Figure 7 a bottom view of another example of the shape of the nail magazine that has been changed.

[0027] Figure 14 It is a front cross-sectional view of the nail driver shown, cut along the XIV-XIV line. Figure 9 Detailed implementation manners

[0028] The representative implementation manners among several implementation manners included in the nail driver of the present invention will be described with reference to the accompanying drawings.

[0029] Figure 1 , Figure 2 and Figure 3 The nail driver 10 shown, for example, is a nail gun. The nail driver 10 has a housing 11, a striking part 12, a machine head 13, a power supply part 14, an electric motor 15, a speed reduction mechanism 16, and a pressure accumulator 18. The housing 11 has a cylinder housing 19, a handle 20, a motor housing 21, and a mounting part 22. The cylinder housing 19 is cylindrical, and the handle 20 and the motor housing 21 are connected to the cylinder housing 19. The handle 20 protrudes from the outer surface of the cylinder housing 19. The mounting part 22 is connected to the handle 20 and the motor housing 21.

[0030] The power supply part 14 can be mounted on the mounting part 22 and removed from the mounting part 22. The electric motor 15 is disposed inside the motor housing 21. The pressure accumulator 18 has a lid 23 and a bracket 24 on which the lid 23 is mounted. A head cover 25 is mounted on the cylinder housing 19, and the pressure accumulator 18 is disposed throughout the inside of the cylinder housing 19 and the inside of the head cover 25.

[0031] The cylinder 27 is received inside the cylinder housing 19. The cylinder 27 is made of metal, such as aluminum or iron. The cylinder 27 is positioned relative to the cylinder housing 19 in the direction along the center line A1 and in the radial direction. The center line A1 is the center of the cylinder 27. As Figure 3 ​​As shown, the direction E1 in which the handle 20 protrudes from the cylinder housing 19 is a direction that intersects the center line A1. The radial direction is the radial direction of an imaginary circle centered on the center line A1. The pressure chamber 26 is formed throughout the accumulator 18 and within the cylinder 27. Compressed gas is filled in the pressure chamber 26. In addition to compressed air, inert gas can also be used as the compressed gas. As an example, the inert gas includes nitrogen and noble gases. In the present embodiment, an example in which compressed air is filled in the pressure chamber 26 will be described.

[0032] The striking part 12 is arranged to extend from the inside to the outside of the housing 11. The striking part 12 has a piston 28 and a driving blade 29. The piston 28 can move in the direction of the center line A1 within the cylinder 27. A Figure 4 ring-shaped sealing member 107 as shown is mounted on the outer peripheral surface of the piston 28. The sealing member 107 contacts the inner peripheral surface of the cylinder 27 to form a sealing surface. As an example, the driving blade 29 is made of metal. The piston 28 and the driving blade 29 are provided as different components, and the piston 28 and the driving blade 29 are connected.

[0033] The machine head 13 is arranged outside the cylinder housing 19. The machine head 13 is arranged to protrude from the cylinder housing 19 in the direction along the center line A1. The machine head 13 is connected to the bumper support 31. The bumper support 31 has a bumper support portion 31A, a wheel housing portion 31B, Figure 1 and Figure 8 a guide portion 31C as shown. The gearbox 17 is mounted on the wheel housing portion 31A. The bumper support portion 31A, the wheel housing portion 31B, and the gearbox 17 are arranged inside the housing 11. The bumper support portion 31A is in a cylindrical shape.

[0034] A bumper 35 is arranged within the bumper support portion 31A. The bumper 35 can be made of either synthetic rubber or silicone rubber. The bumper 35 has a guide hole 36. The driving blade 29 can move within the guide hole 36. As Figure 3 shown, the striking part 12 can perform linear motion in a first direction D1 and a second direction D2 along the center line A1. The first direction D1 and the second direction D2 are opposite directions. The first direction D1 is the direction in which the piston 28 approaches the bumper 35. The second direction D2 is the direction in which the piston 28 moves away from the bumper 35. Due to Figure 1 the gas pressure of the pressure chamber 26 as shown, the striking part 12 is always forced in the first direction D1. The situation where the striking part 12 moves in the first direction D1 can be defined as a descent. The situation where the striking part 12 moves in the second direction D2 can be defined as an ascent.

[0035] As Figure 4As shown, an electric motor 15 is disposed within a motor housing 21. The electric motor 15 has a rotor 39 and a stator 40. The stator 40 is mounted to the motor housing 21. The rotor 39 is mounted to a rotor shaft 41, and a first end portion of the rotor shaft 41 is supported by the motor housing 21 via a bearing 42 so as to be rotatable. The electric motor 15 is a brushless motor, and when a voltage is applied to the electric motor 15, the rotor 39 rotates about a center line A2. In Figure 3 an example is shown in which the center line A1 intersects the center line A2, for example, at an angle of 90 degrees. The center line A1 and the center line A2 may also intersect at an angle different from 90 degrees. Further, in a side view of the driving machine 10, namely Figure 3 in, a direction E1 is parallel to the center line A2.

[0036] The gearbox 17 is cylindrical. A speed reduction mechanism 16 is provided within the gearbox 17. The speed reduction mechanism 16 includes a plurality of planetary gear mechanisms. An input element of the speed reduction mechanism 16 is connected to the rotor shaft 41 via a power transmission shaft 44. The power transmission shaft 44 is supported by a bearing 45 so as to be rotatable.

[0037] A rotating shaft 46 is provided within a wheel housing portion 31B. The rotating shaft 46 is supported by bearings 48 and 49 so as to be rotatable. The rotor shaft 41, the power transmission shaft 44, the speed reduction mechanism 16, and the rotating shaft 46 are concentrically arranged about the center line A2. An output element 108 of the speed reduction mechanism 16 is arranged concentrically with the rotating shaft 46, and the output element 108 rotates integrally with the rotating shaft 46. The speed reduction mechanism 16 is arranged in a power transmission path from the electric motor 15 to the rotating shaft 46.

[0038] A wheel 81 is provided within the wheel housing portion 31B. The wheel 81 is mounted to the rotating shaft 46. A plurality of pins 106 are provided on the wheel 81. The plurality of pins 106 are arranged at intervals in the rotational direction of the wheel 81.

[0039] A plurality of protrusions 83 are provided on the driving machine blade 29. The plurality of protrusions 83 are arranged at intervals in the operating direction of the driving machine blade 29. When the wheel 81 rotates forward by the rotational force of the electric motor 15, the pin 106 can engage with and disengage from the protrusion 83 independently. When the wheel 81 rotates forward and the pin 106 engages with the protrusion 83, the striking portion 12 rises. When the pin 106 is released from the protrusion 83, the striking portion 12 descends under the pressure of compressed air.

[0040] As Figure 4As shown, the locking member 84 is disposed within the gearbox 17. The locking member 84 is capable of engaging with and releasing any one of the rotating members of the reduction mechanism 16. When the locking member 84 is released from the rotating element, the rotating shaft 46 can rotate forward by the rotational force of the electric motor 15 rotating forward. When the locking member 84 engages with the rotating element, in the case where the acting force of the striking portion 12 descending is transmitted to the wheel 81, the locking member 84 prevents the rotating shaft 46 from rotating reversely.

[0041] As Figure 3 shown, the trigger 75 and the trigger switch 85 are disposed on the handle 20. The operator holds the handle 20 by hand and applies or releases an operating force to the trigger 75. The trigger switch 85 detects the presence or absence of the operating force applied to the trigger 75 and outputs a signal corresponding to the detection result.

[0042] The power supply unit 14 includes a housing case 76 and a plurality of battery units housed within the housing case 76. The battery units are secondary batteries capable of charging and discharging, and the battery units can arbitrarily use known battery units such as lithium ion batteries, nickel metal hydride batteries, lithium ion polymer batteries, nickel cadmium batteries, etc.

[0043] In addition, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, a nail cartridge 77 is provided, and the nail cartridge 77 is supported by the machine head portion 32 and the mounting portion 22. Nails 78 are housed within the nail cartridge 77. As Figure 1 shown, a nail feeder 86 is provided on the nail cartridge 77. The nail feeder 86 conveys the nails 78 within the nail cartridge 77 to the machine head portion 13. A push rod 79 is mounted on the machine head portion 13. The push rod 79 is capable of operating within a specified range in the direction along the center line A1 with respect to the machine head portion 13. As Figure 4 shown, an elastic member 80 that applies a force to the push rod 79 in the direction along the center line A1 is provided. As an example, the elastic member 80 is a metal spring, and the elastic member 80 applies a force to the push rod 79 in a direction away from the cylinder housing 19. The push rod 79 comes into contact with the stopper and stops.

[0044] The nail cartridge 77 is provided so as to protrude from the machine head portion 13. If the machine head portion 13 is looked up at as Figure 7 , a part of the configuration area of the nail cartridge 77 overlaps with a part of the configuration area of the handle 20. If the stapler 10 is viewed from above as Figure 2 , the nail cartridge 77 extends from the machine head portion 13 in a direction intersecting the extending direction of the handle 20. In Figure 2In the top view, the staple cartridge 77 is configured to separate from the handle 20 as it moves away from the machine head 13. The area where the staple cartridge 77 is located does not overlap with the area where the battery 14 is located, and a part of the area where the handle 20 is located overlaps with a part of the area where the motor housing 21 is located. As Figure 5 shown, the staple cartridge 77 can store a plurality of staples 78 arranged in a single row. A connecting member 87 that connects the plurality of staples 78 to each other is also provided. The connecting member 87 can be made of synthetic resin, paper, or metal.

[0045] In the present embodiment, the staple 78 illustrated is an element that is temporarily fixed to the object W1. As an example, the staple 78 is made of metal, and the staple 78 has a shaft portion 78A, a first head portion 78B, and a second head portion 78C. The second head portion 78C is located behind the first head portion 78B in the direction in which the staple 78 is driven into the object W1. The outer diameter of the shaft portion 78A is constant. The outer diameter of the first head portion 78B is larger than the outer diameter of the second head portion 78C, and the outer diameters of the first head portion 78B and the second head portion 78C are larger than the outer diameter of the shaft portion 78A.

[0046] As Figure 10 shown, the first head portion 78B has an outer diameter R1, and the second head portion 78C has an outer diameter R2. In the direction along the center line B1 of the staple 78 as Figure 5 shown, the first head portion 78B is provided between the front end 78D of the shaft portion 78A and the second head portion 78C. The second head portion 78C is provided at the rear end of the shaft portion 78A. As Figure 6 shown, the staple 78 has a second length L3 from the first head portion 78B to the second head portion 78C in the direction along the center line B1. The second length L3 is the maximum value of the length from the first head portion 78B to the second head portion 78C in the direction along the center line B1. The first head portion 78B has a third length L4 in the direction along the center line B1. The opening 98 has a length L5 from the second head portion 78C to a connecting plate 102 described later in the direction along the handle axis H1.

[0047] As Figure 1 shown, a staple feeder 86 is provided in the staple cartridge 77, and the staple feeder 86 applies a force to the plurality of staples 78 as Figure 5 shown in a direction crossing the center line B1. The foremost staple 78 among the plurality of staples 78 to which the force is applied reaches the machine head 13.

[0048] The operator moves the machine head 13 close to the object W1. The machine head 13 determines the operating direction of the driving blade 29 of the stapler, and determines the posture and driving direction of the staple 78. As Figure 7 、 Figure 8 and Figure 9As shown, the head portion 13 has a guiding portion 31C, a blade guide 91, and a guiding blade 92. The guiding portion 31C, the blade guide 91, and the guiding blade 92 are respectively fixed to the housing 11 by fixing elements. In addition, in Figure 8 and Figure 9 the illustration of the driving machine blade 29 is omitted.

[0049] As Figure 8 shown, the guiding portion 31C has a base portion 95 and two side walls 96 connected to the base portion 95. The blade guide 91 is disposed between the two side walls 96 and is in contact with the base portion 95. The blade guide 91 and the guiding blade 92 are arranged and disposed in the direction in which the staple cartridge 77 projects from the head portion 13. The blade guide 91 is disposed between the base portion 95 and the guiding blade 92. The staple cartridge 77 is mounted on the guiding blade 92. A supply path 99 is provided throughout the staple cartridge 77 and the guiding blade 92. The staples 78 are conveyed from the supply path 99 to the shooting path 97 by the stapler 86.

[0050] The shooting path 97 is formed between the blade guide 91 and the guiding blade 92. The shooting path 97 is connected to the supply path 99 and the guiding hole 36. The shooting path 97 can be any one of a space, a recess, a passage, or a gap in the direction along the center line A1. The shooting path 97 is a passage through which the driving machine blade 29 and the staples 78 can move in the direction along the center line A1. When the striking portion 12 operates, the driving machine blade 29 moves in the shooting path 97 in the direction along the center line A1. The driving machine blade 29 can strike the staples 78.

[0051] As Figure 6 shown, in the operating direction of the driving machine blade 29, the front end 91B of the blade guide 91 protrudes beyond the front end 100A of the guiding blade 92. In other words, in the direction along the center line A1, a length L6 is formed from the front end 91B of the blade guide 91 to the front end 100A of the guiding blade 92. As Figure 7 and Figure 10 shown, the blade guide 91 has an opening 98. The opening 98 is formed by cutting off a part of the blade guide 91. As Figure 5 shown, the opening 98 connects the shooting path 97 to the outside C1 of the head portion 13. The opening 98 is provided at the portion of the blade guide 91 closest to the guiding blade 92. The handle 20 is disposed over a range H2 in the direction E2 intersecting the direction E1. In Figure 7 the example, the direction E1 and the direction E2 intersect at an angle of approximately 90 degrees. And the opening 98 is disposed within the range H2 in the direction E2. As Figure 10As shown, the width L1 of the opening 98 is larger than the outer diameter R2 of the second head 78C. The part corresponding to the front end of the machine head 13 in the bullet path 97 is the bullet outlet 109. The width L1 of the opening 98 is larger than the width L10 in the bullet path 97 formed by the blade guide 91 of the guiding nail 78 in the direction orthogonal to the center line A1 and the axis H1 of the handle 20. The width L1 of the opening 98 is, for example, shorter than 2.5 times the outer diameter R2. Further, the width L1 is sufficiently larger than the width L7 of the second guiding part 92A described later.

[0052] The blade guide 91 has Figure 8 , Figure 9 and Figure 10 the first guiding part 91A shown. The first guiding part 91A is, for example, a wall surface provided in the direction along the center line A1. The wall surface is curved in a plane perpendicular to the action direction of the striking part 12. The first guiding part 91A determines the posture of the nail 78 by contacting the shaft part 78A of the nail 78. The guiding blade 92 has a second guiding part 92A. The second guiding part 92A is, for example, two wall surfaces provided in the direction along the center line A1. The posture of the nail 78 is determined by contacting the second guiding part 92A and the second head 78C of the nail 78. The width in the direction orthogonal to the center line A1 of the two wall surfaces serving as the second guiding part 92A is set as the width L7. The width L7 is smaller than the outer diameter R1 of the first head 78B and the outer diameter R2 of the second head 78C of the nail 78.

[0053] As Figure 6 shown, in the action direction of the driving machine blade 29, the arrangement ranges of the first guiding part 91A and the second guiding part 92A are different. As an example, the protruding amount from the end of the second guiding part 92A to the end of the first guiding part 91A is the first length L2. In the action direction of the driving machine blade 29, the first length L2 is equal to or less than the second length L3. Further, the first length L2 is longer than the third length L4 of the nail 78. Further, as described above, in the action direction of the driving machine blade 29, the front end 91B of the blade guide 91 protrudes from the front end of the front end 100A of the guiding blade 92 by a length L6, which is, for example, configured to be longer than 0.1 times the diameter R3 of the shaft part 78A of the nail 78. Further, the length L6 is, for example, configured to be shorter than the diameter R3 of the shaft part 78A of the nail 78.

[0054] As Figure 7 shown, the guiding blade 92 has a wall 100. The wall 100 is arranged in the direction along the center line A1. The wall 100 has two side plates 101, 101 and a connecting plate 102 arranged in parallel with each other. The connecting plate 102 connects the side plate 101 and the side plate 101. As Figure 7 and Figure 13As shown, when looking up at the machine head 13, the two side plates 101 and the connecting plate 102 are respectively in a substantially linear shape. The width between the two side plates 101 is set to width L8, which is larger than the width L7 of the second guiding portion 92A that serves as the two wall surfaces. Figure 14 It is a cross-sectional view of the guiding vane 92 of the machine head 13 observed from the shot path 97 side, showing the state where the nail 78 is located in the supply path 99. As Figure 14 shown, the third guiding portion 92C that guides the first head 78B and the second head 78C has a larger width than the second guiding portion 92A of the guiding shaft portion 78A. On the other hand, in order to guide the posture of the nail 78, at multiple positions in the path of the nail 78, a fourth guiding portion 92D with a width narrower than that of the second guiding portion 92A is provided along the feeding direction of the nail. In addition, the width L8 of the side plates 101, 101 of the opening 98 is larger than that of the second guiding portion 92A and the third guiding portion 92C. The width L8 is configured to be, for example, longer than 1.5 times the width L7. In addition, the width L8 is configured to be, for example, shorter than 3 times the width L7. In addition, as Figure 7 and Figure 10 shown, the nail box 77 is inclinedly mounted on the machine head 13 relative to the axis H1 of the handle 20. Therefore, the two side plates 101 and the connecting plate 102 are inclinedly arranged in the same direction as the nail box 77 relative to the axis H1 of the handle 20. The second head 78C of the nail 78 and the connecting plate 102 have a length L5 in the direction along the axis H1 of the handle 20. Since the wall 100 is inclinedly arranged relative to the machine head 13, the portion of the connecting plate 102 that coincides with the second head 78C of the nail 78 in the direction along the axis H1 is arranged away from the nail 78. In other words, the length L5 is longer when the wall 100 is inclined compared to the case where the wall 100 is not inclined. The length L5 is, for example, longer than 0.4 times the second length L3, and preferably longer than 0.5 times the second length L3. In addition, the length L5 is, for example, shorter than 1.0 times the second length L3. In addition, the length L5 is longer than the outer diameter R2 of the second head 78C of the nail 78 and is also longer than 2 times the shaft diameter R3. In addition, the length L5 is longer than 0.5 times the width L8 of the side plates 101, 101 and is shorter than 1.2 times the width L8 of the side plates 101, 101. The width L8 is longer than the width L10 of the shot path 97 and is further configured to be approximately equal to or longer than the width L1. As Figure 6 shown, the front end 100A of the guiding vane 92 in the direction along the center line A1 can be defined as the front end of the wall 100. The guiding vane 92 has ribs 105, and the ribs 105 are connected to the wall 100. A space 110 is provided between the two side plates 101 and the connecting plate 102. The space 110 is connected to the opening 98 and the outside C1. In Figure 6In the cross-section shown, the wall 100 including the connecting plate 102 is connected to the lower surface on the side away from the ejection port 109 as compared to the end on the ejection port 109 side of the rib 105.

[0055] Figure 12 The control circuit 103 shown is provided throughout the mounting portion 22 and within the motor housing 21. The control circuit 103 has a microprocessor. The microprocessor has an input / output interface, an arithmetic processing unit, and a storage unit. In addition, the motor substrate 104 is disposed within the motor housing 21. The inverter circuit 111 is provided on the motor substrate 104. The inverter circuit 111 connects and disconnects the stator 40 of the electric motor 15 to and from the power supply unit 14. The inverter circuit 111 includes a plurality of switching elements, and the plurality of switching elements can be turned on / off respectively. The control circuit 103 and the inverter circuit 111 are connected by a signal cable. The control circuit 103 controls the rotation and stop of the electric motor 15, the rotation speed of the electric motor 15, and the rotation direction of the electric motor 15 by controlling the inverter circuit 111.

[0056] In addition, the push rod switch 112 is provided at the machine head 13, and the position detection sensor 113 is provided within the housing 11. When the push rod 79 is pressed against the object W1, the push rod switch 112 is turned on. When the push rod 79 is separated from the object W1, the push rod switch 112 is turned off. The position detection sensor 113 detects the position in the rotation direction of the wheel 81 and outputs a signal. The push rod switch 112 and the position detection sensor 113 are connected to the control circuit 103 by a signal cable. The control circuit 103 processes the signal of the position detection sensor 113 and detects the position in the direction of the center line A1 of the striking portion 12. Further, a speed sensor 114 for detecting the rotation speed of the rotor 39 of the electric motor 15 and a phase sensor 115 for detecting the phase of the rotation direction of the rotor 39 are provided. The speed sensor 114 and the phase sensor 115 are respectively connected to the control circuit 103 by a signal cable.

[0057] The signals output from the trigger switch 85, the push rod switch 112, the position detection sensor 113, the phase sensor 115, and the speed sensor 114 are input to the control circuit 103. The control circuit 103 processes the input signals to control the inverter circuit 111. In this way, the control circuit 103 controls the stop, rotation, rotation direction, and rotation speed of the electric motor 15.

[0058] A usage example of the driving machine 10 is as follows. When the control circuit 103 detects at least one of the separation of the push rod 79 from the object W1 and the release of the operating force on the trigger 75, the control circuit 103 stops the electric motor 15. If the electric motor 15 stops, the striking portion 12 stops at the standby position. Here, an example where the standby position of the striking portion 12 is a state where the piston 28 is separated from the bumper 35 will be described.

[0059] Any one of the plurality of pins 106 provided on the wheel 81 engages with the protrusion 83. The pressure of the compressed air in the pressure chamber 26 is always applied to the striking portion 12, and the striking portion 12 is urged in the downward direction. The operating force in the direction in which the striking portion 12 is to descend is transmitted to the wheel 81. The locking member 84 prevents the wheel 81 from rotating in the reverse direction. Based on such a principle, the striking portion 12 stops at the standby position. When the striking portion 12 stops at the standby position, a part of the driving machine blade 29 is located in the ejection path 97. The foremost nail 78 among the plurality of nails 78 contacts the driving machine blade 29 and stops in the supply path 99.

[0060] If the operator applies an operating force to the trigger 75 and presses the push rod 79 against the object W1 to operate the push rod 79, the front end 91B of the blade guide 91 contacts the object W1 as Figure 5 and Figure 6 so. Then, the control circuit 103 processes the input signal to rotate the electric motor 15 forward. The rotational force of the electric motor 15 is transmitted to the rotating shaft 46 via the speed reduction mechanism 16. Then, the rotating shaft 46 and the wheel 81 rotate forward, and the striking portion 12 rises from the standby position. If the striking portion 12 rises, the pressure of the compressed air in the pressure chamber 26 rises. The speed reduction mechanism 16 makes the rotational speed of the wheel 81 lower than the rotational speed of the electric motor 15.

[0061] If the striking portion 12 rises from the standby position, the foremost nail 78 enters the ejection path 97 from the supply path 99. The shaft portion 78A contacts the first guide portion 91A, and the nail 78 stops in the ejection path 97. The center line B1 of the nail 78 is inclined with respect to the center line A1.

[0062] If the wheel 81 rotates forward and all the pins 106 are released from all the protrusions 83, the striking portion 12 descends under the pressure of the compressed air in the pressure chamber 26. The position of the striking portion 12 at the moment when all the pins 106 are released from all the protrusions 83 is the top dead center. The striking portion 12 descends, and the front end of the driving machine blade 29 collides with the second head 78C of the nail 78 located in the ejection path 97. Then, the nail 78 moves along the center line A1, and the connecting element 87 breaks. If the nail 78 struck by the driving machine blade 29 moves, the first guide portion 91A contacts the shaft portion 78A, and the second guide portion 92A contacts the second head 78C, thereby determining the posture of the nail 78. That is, the center line B1 and the center line A1 of the nail 78 become substantially a straight line.

[0063] After the shaft portion 78A of the nail 78 is inserted into the object W1, as Figure 6As shown, the first head 78B collides with the object W1. The nail 78 stops in a state where the first head 78B and the second head 78C are exposed from the object W1. At this moment, the striking part 12 has not reached the bottom dead center. When the nail 78 stops, the striking part 12 receives a reaction force, and the housing 11 moves due to this reaction force. Therefore, the front end of the machine head 13, that is, the front end 91B of the vane guide 91, separates from the object W1. In addition, the push rod 79 separates from the object W1, and the push rod switch 112 is turned off. Moreover, the piston 28 collides with the bumper 35, and the bumper 35 absorbs part of the impact energy.

[0064] The position where the piston 28 contacts the bumper 35 is the bottom dead center of the striking part 12. The control circuit 103 also rotates the electric motor 15 after the striking part 12 reaches the bottom dead center. The striking part 12 rises from the bottom dead center. The control circuit 103 stops the electric motor 15 when it detects that the push rod switch 112 is turned off and the striking part 12 has reached the standby position.

[0065] The operation of the process of driving the nail 78 into the object W1 is as follows. When the first head 78B collides with the object W1 and the nail 78 stops, the first head 78B and the second head 78C are exposed from the object W1. When the front end of the machine head 13 separates from the object by the reaction force generated by striking the nail 78 with the striking machine vane 29, the machine head 13 moves away from the operator. The machine head 13 moves, for example, Figure 11 from the position shown by the dotted line in the figure to the upper right in the manner shown by the solid line. At this time, the machine head 13 receives a reaction force and moves in a direction parallel to the axis H1 of the handle 20.

[0066] The driving machine 10 of the present embodiment is provided with an opening 98 in the machine head 13. Therefore, during the separation of the machine head 13 from the object W1, the part of the nail 78 exposed from the object W1 passes through the opening 98 and the space 110. Therefore, contact between the machine head 13 and the nail 78 can be suppressed, and in particular, contact between the machine head 13 and the second head 78C can be suppressed. In addition, as Figure 10 shown, in a plane perpendicular to the movement direction of the striking part 12, the width L1 of the opening 98 is larger than the outer diameter R2 of the second head 78C of the nail 78. In addition, the length L5 is set to be 0.4 times or more of the second length L3. Therefore, contact between the machine head 13 and the second head 78C of the nail 78 can be more reliably suppressed.

[0067] In a plane perpendicular to the direction of movement of the striking part 12, the nail box 77 projects from the machine head 13. Therefore, during the separation of the machine head 13 from the object W1, in the direction in which the nail box 77 approaches the object W1, the center line A1 is inclined with respect to the surface of the object W1. In the direction of movement of the striking part 12, the opening 98 is provided within a range in the same direction as the direction in which the handle 20 projects from the cylinder housing 19. Therefore, due to the reaction generated by driving the nail 78 into the object W1, in the direction in which the nail box 77 approaches the object W1, when the center line A1 is inclined with respect to the surface of the object W1, contact between the machine head 13 and the nail 78 can be suppressed.

[0068] As Figure 6 shown, the first length L2 is equal to or greater than the second length L3 of the nail 78. During the period from when the nail 78 starts to move after being struck by the machine blade 29 until the first head 78B contacts the object W1 and the nail 78 stops, the second guide part 92A contacts the second head 78C to determine the posture of the nail 78. Therefore, the center line B1 of the nail 78 can be maintained substantially perpendicular to the surface of the object W1. Additionally, if the broken connecting element 87 is expelled from the opening 98 to the space 110 from the shooting path 97, the connecting element 87 collides with the wall 100 and falls onto the surface of the object W1. Therefore, scattering of the broken pieces of the connecting element 87 at the work site can be suppressed. Furthermore, an operator can hook a tool onto the second head 78C to pull out the nail 78 from the object W1.

[0069] Figure 13 is another example in which a part of the machine head 13 is changed. In a plane perpendicular to the direction of movement of the striking part 12, the connecting plate 102 has an arc shape. In a plane perpendicular to the direction of movement of the striking part 12, the blade guide 91 has an arc shape. The bottom surface shapes of the blade guide 91 and the wall 100 are elliptical shapes.

[0070] An example of the technical meaning of the matters disclosed in the embodiment is as follows. The driving machine 10 is an example of a driving machine. The machine head 13 is an example of a machine head. The striking part 12 is an example of a striking part. The cylinder housing 19 is an example of a main body. The handle 20 is an example of a handle. The shooting path 97 is an example of a shooting path. The opening 98 is an example of an opening. The nail box 77 is an example of a nail box. The direction along the center line A1 is an example of the linear movement direction of the striking part.

[0071] The blade guide 91 is an example of the first member. The guide vane 92 is an example of the second member. The first guide portion 91A is an example of the first guide portion. The second guide portion 92A is an example of the second guide portion. The wall 100 is an example of the wall. The connecting element 87 is an example of the connecting element. The nail 78 is an example of the fixing member. The shaft portion 78A is an example of the shaft portion. The first head 78B is an example of the first head. The second head 78C is an example of the second head. The first head 78B and the second head 78C are examples of the heads. The direction E1 is an example of the direction in which the handle projects from the main body. The direction E2 is an example of the direction intersecting the direction E1. The direction E1 and the direction E2 may also intersect at an angle different from 90 degrees. The range R2 is an example of the range.

[0072] The width L1 of the opening 98 is an example of the width of the opening. The first length L2 is an example of the length from the front end of the machine head portion to the second guide portion. The outer diameter R1 is an example of the outer diameter. The second length L3 is an example of the maximum length from the first head to the second head. The first direction D1 in which the striking portion 12 descends is an example of the first direction. The second direction D2 in which the striking portion 12 ascends is an example of the second direction. The accumulator 18 and the pressure chamber 26 are examples of the first biasing mechanism. The electric motor 15, the rotating shaft 46, and the wheel 81 are examples of the second biasing mechanism. Figure 2 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 13 respectively correspond to a plan view along the linear motion direction perpendicular to the striking portion.

[0073] The nail driving machine is not limited to the disclosed embodiments, and various modifications can be made without departing from the gist thereof. For example, the nail magazine may be either a member in which a plurality of fixing members are arranged at intervals in the radial direction of the shaft portion and stored linearly, or a member in which a plurality of fixing members are arranged at intervals in the radial direction of the shaft portion and stored in a spiral shape.

[0074] The wall may be provided on either the machine head portion or the nail magazine. Furthermore, the state where the fixing member is not completely driven into the object also includes the following state. In the fixing member having one head, a part of the head and the shaft portion is in a state of being exposed outside the object.

[0075] Alternatively, the machine head portion may include: a main body fixed to the housing and having a shooting path; and a push rod capable of moving relative to the main body in the linear motion direction of the striking portion. In this case, the opening is provided at the front end of the push rod.

[0076] As the first biasing mechanism, any one of a solid spring, a magnet, or a pressure accumulator chamber may be provided. The solid spring biases the striking portion with elastic energy. The magnet biases the impact portion with magnetic force. The pressure accumulator chamber biases the striking portion with the pressure of compressed air supplied from the outside of the housing.

[0077] If the first biasing mechanism is a solid spring or a magnet, a motor can be used as the second biasing mechanism. The motor can be any one of an electric motor, a hydraulic motor, a pneumatic motor, or an engine. If the first biasing mechanism is a pressure chamber, a return air chamber can be provided as the second biasing mechanism. The return air chamber biases the striking portion in the second direction with the pressure of compressed air.

[0078] Regarding the compressed gas that biases the striking portion in the first direction, an inert gas such as nitrogen or a noble gas can also be used instead of compressed air. Moreover, the standby position of the striking portion can also be the position where the piston contacts and stops at the bumper.

[0079] The fixing member fixes these objects to each other by driving into or sinking into a plurality of objects. The fixing member can be either a member that finally fixes a plurality of objects to each other or a member that temporarily fixes a plurality of objects to each other. The fixing member can be either a nail with a head or a nail without a head. Additionally, the fixing member can also be either shaft-shaped or arch-shaped. The machine head has the function of guiding the movement direction of the striking portion and the function of maintaining the posture of the fixing member. As an example, the machine head is made of metal or synthetic resin. The striking portion is an element that strikes the fixing member and has a shaft portion.

[0080] The main body can be any one of a housing, a shell, a boss portion, an outer casing, etc. The handle protrudes from the main body, and the operator holds the handle with a hand. As an example, the handle can be made of either metal or synthetic resin. The outer surface of the handle can also be covered with an elastomer. The ejection path includes a passage, a hole, a space, a gap, etc. The opening portion is formed by cutting a part of the machine head and can also be a slit, a recess, a window portion, etc. The opening portion is connected to the end of the machine head. The first component and the second component can each be made of metal or synthetic resin. The first guiding portion and the second guiding portion include ribs, wall surfaces, protrusions, tracks, etc. The power supply portion can be either a DC power supply or an AC power supply. The AC power supply is connected to the outer casing through a power cable. The DC power supply can be either a secondary battery or a primary battery. The objects into which the fixing member is driven can be any one of wood, concrete, gypsum board, decorative board, etc.

[0081] Symbol Explanation

[0082] 10... Driving machine, 19... Cylinder housing, 12... Striking part, 13... Machine head, 15... Electric motor, 18... Accumulator vessel, 26... Pressure chamber, 46... Rotating shaft, 77... Nail magazine, 87... Connecting element, 78... Nail, 78A... Shaft part, 78B... First head, 78C... Second head, 81... Wheel, 91... Vane guide, 91A... First guide part, 92... Guide vane, 92A... Second guide part, 97... Firing path, 98... Opening, 100... Wall, D1... First direction, D2... Second direction, E1, E2... Directions, L1... Width, L2... First length, L3... Second length, L4... Third length, R1... Outer diameter, R2... Outer diameter, H2... Range

Claims

1. A driving machine having: a main body; a striking part movably supported by the main body; a handle extending from the main body; and a machine head mounted on the main body and holding a fixing member before being struck by the striking part, The driving machine is characterized in that, The machine head has: A first member, A second member adjacent to the first member in the direction in which the handle protrudes from the main body; A shooting path defined between the first component and the second component, and accommodating the striking portion in a movable manner and guiding the fixing member; And A shooting outlet provided in the shooting path and for shooting out the fixing member, The fixing member has a shaft portion with a constant outer diameter and a head portion with an outer diameter larger than that of the shaft portion, The shooting path has a first guiding portion and a second guiding portion. The first guiding portion is provided on the first member and determines the posture of the fixing member by contacting the fixing member; The second guiding portion is provided on the second member and determines the posture of the fixing member by contacting the fixing member, An opening portion is provided on the handle side of the shooting path in the direction in which the handle extends from the main body. The opening portion extends from the front end of the machine head to the end of the second guiding portion in the linear motion direction of the striking part, When viewed from above in a direction perpendicular to the linear motion direction of the striking part, the width of the opening portion is larger than the outer diameter of the head portion of the fixing member.

2. The driving machine according to claim 1, characterized in that, When viewed from above in a direction perpendicular to the linear motion direction of the striking part, the width of the opening portion is larger than the width of the shooting outlet.

3. The driving machine according to claim 1, characterized in that, The second member has a wall protruding in the operating direction of the striking part, When viewed from above in a direction perpendicular to the operating direction of the striking part, the opening portion is disposed between the first guiding portion and the wall.

4. The driving machine according to claim 3, characterized in that, In the operating direction of the striking part, the position of the front end of the wall of the second member is located behind the position of the front end of the first member.

5. The driving machine according to claim 3, characterized in that, The wall has two side plates arranged oppositely, and the widths of the two side plates are formed to be larger than the width of the shooting outlet.

6. The driving machine according to claim 1, characterized in that, The head portion of the fixing member includes a first head portion and a second head portion, and the second head portion is disposed behind the first head portion in the direction in which the striking part shoots out from the machine head.

7. The driving machine according to claim 6, characterized in that, The second member has a wall protruding in the operating direction of the striking part, When viewed from above in a direction perpendicular to the operating direction of the striking part, the opening portion is disposed between the first guiding portion and the wall, The length from the second head portion to the wall in the direction along the handle is longer than the outer diameter of the second head portion.

8. The driving machine according to claim 6, characterized in that, The second member has a wall protruding in the operating direction of the striking part, When viewed from above in a direction perpendicular to the operating direction of the striking part, the opening portion is disposed between the first guiding portion and the wall, The length from the second head to the wall in the direction along the handle is not less than 0.4 times the second length from the first head to the second head in the linear motion direction of the striking part.

9. The driving-in machine according to claim 6, characterized in that In the linear motion direction of the striking part, the length from the front end of the machine head part to the second guiding part is not more than the length from the first head to the second head.

10. The driving-in machine according to claim 7, characterized in that In the linear motion direction of the striking part, the length from the front end of the machine head part to the second guiding part is longer than the length of the first head.

11. The driving-in machine according to claim 1, characterized in that It has a nail box extending from the machine head part and capable of holding the fixing piece, When viewed from above in a direction perpendicular to the linear motion direction of the striking part, at least a part of the arrangement area of the nail box overlaps with at least a part of the arrangement area of the handle.

12. The driving-in machine according to claim 3, characterized in that When viewed from above in a direction perpendicular to the linear motion direction of the striking part, the first component and the wall are arranged in an oval shape.

13. The driving-in machine according to claim 1, characterized in that It is further provided with: a first biasing mechanism that causes the striking part to move in a first direction in such a manner that the striking part strikes the fixing piece; and a second biasing mechanism that causes the striking part to move in a second direction opposite to the first direction.

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