driving-in machine

Abstract

The present invention provides a driving machine that can reduce the load in any of a plurality of engaging components. The driving machine includes: an injection section to which fasteners are supplied; an impact section (12) that impacts the fasteners; a rack (31) disposed on the impact section (12); a wheel (39) rotatably disposed thereon; and a plurality of pins (42) disposed on the wheel (39) and respectively engaging and disengaging with respect to the rack (31), wherein the plurality of pins (42) are respectively capable of changing their positions in the wheel (39), and the plurality of pins (42) includes: a pin (42X) located in a first position capable of engaging with the rack (31); and a pin (42Y) located behind the pin (42X) and in a second position not capable of engaging with the rack (31) in the rotational direction of the wheel (39) when the impact section (12) moves in the direction of impacting the fastener.

Description

Technical Field

[0001] This invention relates to a driving machine having an impact portion of an impact fastener. Background Technology

[0002] Patent Document 1 describes an example of a driving machine equipped with an impact part for impact fasteners. The driving machine described in Patent Document 1 includes an electric motor, an impact part, a accumulator chamber, a rotating component, an injection part, a fastener cartridge, and a trigger. The impact part has a piston that withstands the pressure of the accumulator chamber and a transmission plate fixed to the piston. The impact part is capable of moving in a first direction and a second direction. The transmission plate has a rack.

[0003] The rotating component has multiple engaging members arranged along the rotation direction. The rotating component has a guide hole, and one of the engaging members is located within the guide hole. The engaging member located in the guide hole is positioned at the rearmost part in the rotation direction of the rotating component. The engaging member located in the guide hole is capable of moving radially within the guide hole along the rotating component. Furthermore, a metal spring is provided, which applies force to the engaging member located in the guide hole radially outward. The rotating component is rotated by an electric motor. Nails are supplied from the nail cartridge to the ejection section.

[0004] In the injection machine described in Patent Document 1, if an operating force is applied to the trigger while the impact section is stopped, the electric motor rotates. Then, multiple engaging members provided on the rotating component individually engage and disengage relative to the rack provided on the transmission plate, causing the impact section to move in a second direction. If all the engaging members disengage from the rack, the impact section moves in a first direction under the pressure of the accumulator chamber. The nail supplied to the injection section is impacted by the transmission plate.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2016-199670 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] If multiple engaging components engage with the rack individually, increasing the load, the engaging component located in the guide hole moves radially along the rotating component, thus reducing the load. The inventors of this application recognized the problem that other engaging components not located in the guide hole could not reduce the load.

[0010] The purpose of this invention is to provide an injection machine that can reduce the load in any of the multiple engaging components.

[0011] Solution for solving the problem

[0012] One embodiment of the driving machine includes: an injection section for supplying fasteners; an impact section that operates in a first direction and a second direction opposite to the first direction to impact the fasteners supplied to the injection section; a rack disposed on the impact section; a rotating member rotatably disposed; and a plurality of engaging members disposed at intervals on the rotating member in the rotation direction of the rotating member, and engaging and releasing relative to the rack by rotation of the rotating member, wherein the plurality of engaging members can change their positions relative to the rotating member, and the plurality of engaging members includes: a first engaging member located in a first position, the first position being a position in which the first engaging member engages with the rack to transmit the rotational force of the rotating member to the impact section, thereby enabling the impact section to operate in the second direction; and a second engaging member located behind the first engaging member in the rotation direction of the rotating member and in a second position in which it cannot engage with the rack when the first engaging member is released from the rack and the impact section operates in the first direction.

[0013] The effects of the invention are as follows.

[0014] In one embodiment of the insertion machine, multiple engaging components can move from a first position to a second position according to the load. Therefore, the load can be reduced in any of the multiple engaging components. Attached Figure Description

[0015] Figure 1 This is a side sectional view of a nailing machine illustrating one embodiment of the present invention.

[0016] Figure 2 This is a front view showing the overall structure of the impact section located in the nail machine.

[0017] Figure 3 It is shown Figure 2 A cross-sectional view of the impact part in the standby position at rest.

[0018] Figure 4 This is a top view of the wheels of a nailing machine.

[0019] Figure 5 This is a cross-sectional view showing an example of the impact point descending.

[0020] Figure 6 (A) is Figure 4 The sectional view of line II-II, (B) is Figure 4 A cross-sectional view along line III-III.

[0021] Figure 7 This is a block diagram showing the control system of the nailing machine.

[0022] Figure 8 (A) is a cross-sectional view showing an example where the impact part is located at the bottom dead center, and (B) is a cross-sectional view showing an example where the impact part rises from the bottom dead center.

[0023] Figure 9 Other examples of the adjustment mechanism are shown: (A) is a cross-sectional view showing the impact part reaching the top dead center, and (B) is a cross-sectional view showing an example of the impact part descending.

[0024] Figure 10 This is a bottom view showing another example of a wheel installed on a nailing machine.

[0025] Figure 11 (A) is shown to have Figure 10 (B) is a front view of an example of a nailing machine with its impact part stopped in a standby position. Figure 5 The front view of an example where the impact part reaches the top dead center.

[0026] Figure 12 (A) is Figure 10 The cross-sectional view of line IV-IV, (B) is Figure 10 A cross-sectional view of the VV line.

[0027] Figure 13 (A) is a front view showing the process of the impact part descending, and (B) is a front view showing an example of the impact part being at the bottom dead center.

[0028] Figure 14 This is a three-dimensional view of the impact zone. Detailed Implementation

[0029] Representative embodiments of the punching machine of the present invention will be described with reference to the accompanying drawings.

[0030] Figure 1 The image shows a nailing machine 10 as an example of a nailing machine. The nailing machine 10 has a housing 11, an impact unit 12, a head 13, a power supply unit 14, an electric motor 15, a reduction gear 16, a wheel 39, and a pressure accumulator 18. The housing 11 has a cylindrical shell 19, a handle 20 connected to the cylindrical shell 19, a motor housing 21 connected to the cylindrical shell 19, and an assembly part 22 connected to the handle 20 and the motor housing 21. The power supply unit 14 can be installed and removed relative to the assembly part 22. The electric motor 15 is disposed within the motor housing 21. The pressure accumulator 18 has a cover 23 and a bracket 24 for mounting the cover 23. A head cover 25 is mounted on the cylindrical shell 19, and the pressure accumulator 18 is disposed throughout both the cylindrical shell 19 and the head cover 25.

[0031] Cylinder 27 is housed within shell 19. Cylinder 27 is made of metal, such as aluminum or iron. Pressure chamber 26 is formed throughout accumulator 18 and cylinder 27. Pressure chamber 26 is filled with a compressible fluid. In addition to air, inert gas can also be used as the compressible fluid. For example, inert gas includes nitrogen and rare gases. In this embodiment, an example of filling pressure chamber 26 with air will be described. Head 13 is disposed throughout the inner and outer parts of shell 19. Head 13 has a buffer support 50, an ejection part 51, and a barrel part 52. Buffer support 50 is cylindrical and supports buffer 34. Buffer 34 is annular and made of synthetic rubber.

[0032] Impact section 12 is disposed from the inside to the outside of housing 11. Impact section 12 has piston 28 and drive plate 29. Piston 28 is disposed inside cylinder 27. Impact section 12 is capable of moving along imaginary line A1. Imaginary line A1 is a straight line showing the center line of cylinder 27. Imaginary line A1 is an engineering imaginary line and does not exist physically. An annular sealing member 30 is installed on the outer peripheral surface of piston 28. Sealing member 30 is made of synthetic rubber. Sealing member 30 contacts the inner peripheral surface of cylinder 27 to form a sealing surface. Furthermore, wheel 39 is disposed inside cylinder 52. Wheel 39 is mounted on rotating shaft 40, which is rotatably supported by bearings 57 and 58. Rotating shaft 40 and wheel 39 are capable of rotating around rotation center line B1.

[0033] If the nail machine 10 is viewed from the side in a plane including the imaginary line A1, the rotation center line B1 intersects the imaginary line A1, for example, at a 90-degree angle. Furthermore, in a plane perpendicular to the rotation center line B1... Figure 2 In the configuration, the rotation center line B1 is arranged separately from the imaginary line A1. The transmission plate 29 is made of, for example, metal, and has... Figure 2 The rack 31 and contact portion 33 are shown. The rack 31 is composed of multiple protrusions 32, for example, nine protrusions 32. The nine protrusions 32 are spaced apart along the imaginary line A1, for example, at equal intervals. The contact portion 33 protrudes from the side of the transmission plate 29 in the direction along the rotation center line B1. The contact portion 33 is provided near the edge of the transmission plate 29 located opposite to the edge where the rack 31 is located. In the direction of operation of the impact portion 12, the contact portion 33 extends from the position corresponding to the protrusion 32 furthest from the piston 28 to the front end of the transmission plate 29.

[0034] The position of the impact unit 12 in the direction of its movement includes the top dead center and the bottom dead center. For example... Figure 1As shown by the dashed line, the top dead center of the impact section 12 is when the end of the piston 28 and the end of the cylinder 27 are at approximately the same position along the imaginary line A1. Figure 1 As shown by the solid line, the bottom dead center of the impact section 12 is the state where the piston 28 is in contact with the buffer 34. Furthermore, in this embodiment, the state where the impact section 12 is located between the top dead center and the bottom dead center is treated as the standby position. The standby position of the impact section 12 is when the piston 28 has moved away from the buffer 34 and is in... Figure 1 The end of the piston 28 is positioned below the end of the cylinder 27.

[0035] Figure 3 It is Figure 2 A magnified view of the main part. Figure 4 This is a top view of wheel 39. The transmission plate latch (plate latch) 35 and wheel latches 36 and 37 are disposed within the housing 11. The transmission plate latch 35, wheel latches 36 and 37 constitute the adjustment mechanism 77. The transmission plate latch 35 is made of, for example, metal or synthetic resin. The transmission plate latch 35 is fixed to the movable shaft 38 in a non-rotatable manner. Both the transmission plate latch 35 and the movable shaft 38 are capable of moving within a predetermined angular range about the rotation center line B3. The rotation center line B3 is an imaginary line passing through the center of the movable shaft 38. In a plane perpendicular to the rotation center line B1... Figure 3 In this configuration, a transmission plate 29 is disposed between the movable shaft 38 and the rotation shaft 40 of the wheel 39. The movable shaft 38 is disposed within the position of the wheel 39 along the imaginary line A1.

[0036] like Figure 4 As shown, at least a portion of the arrangement range of the transmission plate latch 35 overlaps with at least a portion of the arrangement range of the contact portion 33 of the transmission plate 29 in the direction along the rotation center line B1. A limiting member 41 is provided in the housing 11. The limiting member 41 is made of metal or synthetic resin. The transmission plate latch 35 is held in place by a spring 81. Figure 3 A force is applied in a counter-clockwise direction. If the transmission plate latch is 35 degrees... Figure 5 When the transmission plate latch 35 contacts the limiting member 41, it stops. Two wheel latches 36 are provided across the transmission plate 29 along the rotation center line B1. Both wheel latches 36 are made of metal or synthetic resin. Each wheel latch 36 is fixed to the movable shaft 38 in a non-rotatable manner, and both wheel latches 36 can rotate together with the movable shaft 38 within a predetermined angle range around the rotation center line Q1. Limiting members 80 are respectively provided on each of the two wheel latches 36.

[0037] Two wheel latches 37 are provided. Both wheel latches 37 are made of metal or synthetic resin. Each wheel latch 37 can be individually configured to move around the support shaft 43 relative to the wheel latch 36. The configuration of the wheel latches 37 and the support shaft 43 differs from that of the transmission plate 29 along the rotation center line B1. The wheel latches 37 are held in place by springs 44. Figure 3 When force is applied to D4 in a clockwise direction, the wheel latch 37 is engaged. Figure 5 The ground stops upon contact with the limiting element 80.

[0038] like Figure 5 As shown, if the transmission plate latch 35 disengages from the contact portion 33, the transmission plate latch 35 contacts the limiting member 41 and stops. If the transmission plate latch 35 contacts the limiting member 41 and stops, then as... Figure 5 As shown, in a plane perpendicular to the rotation center line B1, the wheel latch 37 is completely stopped outside the configuration range of the wheel 39. The state where the wheel latch 37 is completely outside the configuration range of the wheel 39 is the standby position of the wheel latch 37. If the transmission plate 29 moves in the second direction D2 and the contact part 33 contacts the transmission plate latch 35, then the transmission plate latch 35 overcomes the force of the spring 81 and... Figure 5 D5 moves clockwise. If the transmission plate latch 35 is in... Figure 5 When D5 moves clockwise, a portion of the wheel latch 37 enters the configuration range of the wheel 39 in a plane perpendicular to the rotation center line B1. This state, where a portion of the wheel latch 37 is within the configuration range of the wheel 39, is the second position of the wheel latch 37.

[0039] If the transmission plate 29 moves in the first direction D1 and the transmission plate latch 35 disengages from the contact portion 33, the transmission plate latch 35 moves counterclockwise by the force of the spring 81. Then, in a plane perpendicular to the rotation center line B1, the front end of the wheel latch 37 moves out of the arrangement range of the wheel 39. Then, if the transmission plate latch 35 contacts the limiting member 41, the transmission plate latch 35 and the wheel latches 36 and 37 stop.

[0040] like Figure 1 As shown, an electric motor 15 is disposed within a motor housing 21. The electric motor 15 has a rotor 45 and a stator 46. The stator 46 is mounted on the motor housing 21. The rotor 45 is mounted on a rotor shaft 47, which is rotatably supported by the motor housing 21 via bearings 48. The electric motor 15 is a brushless motor, and when voltage is applied to the electric motor 15, the rotor shaft 47 can rotate forward or backward around the rotation center line B1.

[0041] A gearbox 49 is housed within the motor housing 21. A reduction mechanism 16 is disposed within the gearbox 49. The reduction mechanism 16 comprises multiple sets of planetary gears. The input element of the reduction mechanism 16 is connected to the rotor shaft 47 via the power transmission shaft 53. The output element of the reduction mechanism 16 is connected to the rotation shaft 40. The reduction mechanism 16 is positioned along the power transmission path from the electric motor 15 to the rotation shaft 40. Figure 1 As shown, the rotation limiting mechanism 59 is disposed inside the gearbox 49. The rotation limiting mechanism 59 utilizes the rotational force of the electric motor 15 during forward rotation to control the rotation of the shaft 40. Figure 3 The rotation is counterclockwise in the direction D3. When the kinetic force of the impact section 12 in the first direction D1 is transmitted to the wheel 39, the rotation limiting mechanism 59 prevents the rotation shaft 40 from rotating in the direction D3. Figure 3 Rotate clockwise from the center.

[0042] Along Figure 3 Along the rotation center line B1, bearings 57 and 58 are spaced apart, with bearing 57 positioned between bearing 58 and reduction gear 16. A wheel 39 is positioned between bearings 57 and 58 along the rotation center line B1. Along the rotation center line B1, the wheel 39 has two bosses 60 separated by a transmission plate 29, two pin retaining members 61, and a plurality of pins 42. Along the rotation center line B1, two bosses 60 are provided between the pin retaining members 61. The two bosses 60 and the two pin retaining members 61 are made of metal. The two bosses 60 are annular and fixed to the rotation shaft 40. The two pin retaining members 61 are annular and plate-shaped. The pin retaining members 61 are fixed to the bosses 60. Along the rotation center line B1, a portion of a rack 31 is positioned between the two bosses 60. That is, in a plane perpendicular to the rotation center line B1... Figure 3 As shown, a portion of the operating range C1 of the rack 31 of the transmission plate 29 overlaps with the configuration range of the wheel 39.

[0043] As an example of multiple guide sections, the two bosses 60 each have Figure 6The seven support holes 63 shown in (A) are arranged radially from the inside to the outside of the boss portion 60. Each support hole 63 is an elongated hole. The seven support holes 63 are spaced apart in the rotation direction of the wheel 39. The support holes 63 penetrate the boss portion 60 in the direction along the rotation center line B1. The two inner surfaces 63A forming a support hole 63 are substantially parallel. In a plane perpendicular to the rotation center line B1, the imaginary line E1 passing between the two inner surfaces 63A does not intersect the rotation center line B1. The circumcircle of the support holes 63 is common, and the incircle of the support holes 63 is also common. The widths of the support holes 63 in the direction perpendicular to the imaginary line E1 are all the same. The widths of the support holes 63 are the same in both boss portions 60. In the rotation direction of the wheel 39, the locations where the seven support holes 63 are provided are the same in both boss portions 60.

[0044] For a plurality of pins 42, seven are provided as an example. The seven pins 42 are metal shaft components, such as... Figure 4 As shown, each of the seven pins 42 has a large-diameter portion 42A and a small-diameter portion 42B. Along the rotation center line B1, the small-diameter portion 42B is located at two points, with the large-diameter portion 42A located between the two small-diameter portions 42B. The large-diameter portions 42A and 42B are concentrically arranged and directly connected. The diameter of the large-diameter portion 42A is larger than the diameter of the small-diameter portion 42B, and both the large-diameter portion 42A and 42B are cylindrical. Seven springs 66 are respectively mounted on two boss portions 60. The springs 66 are metal torsion helical springs, and each spring 66 applies force to the pin 42 radially outward from the wheel 39. The radial direction of the wheel 39 refers to the radial direction of an imaginary circle centered on the rotation center line B1.

[0045] Both pin retaining members 61 are circular plate-shaped. As an example of multiple guide sections, each of the two pin retaining members 61 has... Figure 6 The seven guide holes 64 are shown in (B). The seven guide holes 64 are spaced apart in the rotational direction of the wheel 39. The locations where the guide holes 64 are provided are identical in the rotational direction of the two pin retaining members 61. The guide holes 64 are provided radially from the inside to the outside of the pin retaining member 61. The two inner surfaces 64A forming a guide hole 64 are substantially parallel. In a plane perpendicular to the rotation center line B1, an imaginary line E2 passing between the two inner surfaces 64A does not intersect the rotation center line B1, and extends radially from the inside to the outside of the wheel hub 39, inclined towards the rear of the rotational direction of the wheel hub 39.

[0046] The circumcircles of the guide holes 64 are common, and the incircles of the guide holes 64 are also common. All guide holes 64 have the same width in the direction perpendicular to the imaginary line E2. The width of the guide holes 64 is narrower than the width of the support holes 63. The support holes 63 and guide holes 64 are located in the same position in the rotation direction of the wheel 39. Furthermore, in a plane perpendicular to the rotation center line B1, limiting members 65 protrude from two inner surfaces 64A respectively.

[0047] A portion of the large-diameter portion 42A of the pin 42 is disposed between the boss portions 60. A portion of the small-diameter portion 42B of the pin 42 is disposed in the support hole 63 and the guide hole 64. The diameter of the small-diameter portion 42B is smaller than the width of the support hole 63 and the width of the guide hole 64, and larger than the distance between the two limiting members 65. Figure 6 As shown in (A), the first position is when pin 42 is located on the outermost side of the wheel 39 in the radial direction within the guide hole 64. The second position is when pin 42 is located on the innermost side of the wheel 39 in the radial direction within the guide hole 64. In the direction along the rotation center line B1, a portion of the small diameter portion 42B of pin 42 is disposed between pin retaining member 61 and bearing 57, and also between pin retaining member 61 and bearing 58. In the direction along the rotation center line B1, a portion of the arrangement range of the small diameter portion 42B of pin 42 overlaps with a portion of the arrangement range of wheel latch 37.

[0048] The number of each of the support hole 63, guide hole 64, and pin 42 is seven, which is less than the number of the protrusions 32 constituting the rack 31 is nine. If in Figure 3 When the central wheel 39 rotates counterclockwise in the direction D3, all seven pins 42 revolve around the rotation center line B1. Furthermore, the small-diameter portion 42B of each pin 42 can move within the support hole 63 along the imaginary line E1. The small-diameter portion 42B of each pin 42 can also move within the guide hole 64 along the imaginary line E2. Each of the seven pins 42 can individually change the radial position of the wheel 39. If the seven pins 42... Figure 6 When all seven pins 42 are stopped in the first position as shown in (B), they are spaced apart in the rotational direction of the wheel 39. Specifically, the seven pins 42 are spaced equally apart in the rotational direction of the wheel 39 on the same circumference centered on the rotation center line B1. If the limiting member 65 contacts the small diameter portion 42B of the pin 42, the movement of the pin 42 in the guide hole 64 is restricted. However, if the force applied to the pin 42 increases, the limiting member 65 elastically deforms, and the small diameter portion 42B moves past the limiting member 65 and into the guide hole 64.

[0049] A release part 67 is provided on the inner surface of the cylindrical portion 52. The release part 67 is located at approximately 45 degrees within an approximately 180-degree range closer to the transmission plate 29 in the rotational direction of the wheel 39. The front end of the release part 67 is located radially within the configuration range of the guide hole 64 on the wheel 39. The release part 67 extends from between the bearing 57 and the small-diameter portion 42B of the pin 42 towards the bearing 57 and the pin retaining member 61. Furthermore, the release part 67 extends from between the bearing 58 and the small-diameter portion 42B of the pin 42 towards the bearing 57 and the pin retaining member 61. If the wheel 39 is in... Figure 3 When rotated counterclockwise by D3, pin 42, which stops at the second position, comes into contact with release part 67. Pin 42 is pressed outward by release part 67 in the radial direction of wheel 39, moves within guide hole 64, and small diameter portion 42B of pin 42 passes over limit member 65, thereby moving towards the first position.

[0050] The power supply unit 14 has a housing and multiple battery cells housed within the housing. The battery cells are rechargeable and dischargeable secondary batteries, and can be any known battery type such as lithium-ion batteries, nickel-metal hydride batteries, lithium-ion polymer batteries, or nickel-cadmium batteries. Furthermore, as... Figure 1 The diagram shows a nail cartridge 68, supported by an injection unit 51 and an assembly unit 22. Multiple nails 69 are stored within the cartridge 68. The cartridge 68 has a feeder that delivers the nails 69 from the cartridge 68 to the injection unit. The injection unit 51 is made of metal or synthetic resin. A push rod 70 is mounted on the injection unit 51. The push rod 70 is operable relative to the injection unit 51 within a predetermined range in the direction of the imaginary line A1.

[0051] like Figure 1 As shown, trigger 71 and trigger switch 72 are located on handle 20. Trigger switch 72 detects whether an operating force is applied to trigger 71 and outputs a signal corresponding to the detection result. Furthermore, Figure 7 The push rod switch 73 shown is provided at the injection section 51. The push rod switch 73 detects whether the push rod 70 is pressed against or separated from the object piece W1, and outputs a signal. Furthermore, a position detection sensor 74 is provided to detect the position of the impact section 12 along the imaginary line A1 and outputs a signal.

[0052] The control circuit 75 is housed within the assembly section 22. The control circuit 75 is a microcomputer with input / output interfaces, a central processing unit, and a storage unit. Furthermore, the inverter circuit 76 is housed within the motor housing 21. The inverter circuit 76 connects and disconnects the stator 46 of the electric motor 15 from the power supply section 14. The inverter circuit 76 has multiple switching elements, which can be individually turned on and off. The control circuit 75 processes signals output from the trigger switch 72, the push-rod switch 73, and the position detection sensor 74. The control circuit 75 controls the rotation and stop of the electric motor 15, the speed of the electric motor 15, and the direction of rotation of the electric motor 15 by controlling the inverter circuit 76.

[0053] The use of the nailing machine 10 is as follows. If the operating force on the trigger 71 is released and the push rod 70 moves away from the object W1, the control circuit 75 stops the electric motor 15. If the electric motor 15 stops, the impact unit 12 stops in the standby position. The impact unit 12 receives a force in the first direction D1 from the pressure chamber 26. Figure 3 As shown, a protrusion 32 in the rack 31 engages with the pin 42, specifically with the large-diameter portion 42A. Therefore, the wheel 39 is subjected to... Figure 3 The rotational force is clockwise. The rotation limiting mechanism 59 prevents the wheel 39 from rotating in the same direction. Figure 3 The impact part 12 rotates clockwise. Therefore, the impact part 12 stops in the standby position. In addition, in this embodiment, "the protrusion 32 engages with the large diameter part 42A" is described as "the protrusion 32 engages with the pin 42", and "the large diameter part 42A is released from the protrusion 32" is described as "the pin 42 is released from the protrusion 32".

[0054] If the impact section 12 stops in the standby position, then as Figure 3 As shown, a pin 42 (42X) engages with a protrusion 32. Furthermore, five pins 42 are located outside the operating range C1 of the rack 31, and each of the five pins 42 is released from the protrusion 32. The five pins 42 located outside the operating area of ​​the rack 31 are pressed against the inner wall of the support hole 63 by a spring 66, and stop at a first position.

[0055] Furthermore, Figure 3In the transmission plate latch 35, the end of the contact portion 33 is pressed in the direction along the imaginary line A1, thus overcoming the force of the spring 81 and moving clockwise by a predetermined angle to a position, i.e., the operating position. The wheel latch 37 stops in a position partially located within the configuration area of ​​the wheel 39, i.e., the forward position. The wheel latch 37 is pressed against a pin 42 (42Y) located one position behind pin 42 (42X) in the rotational direction of the wheel 39. The pin 42 (42Y) pressed by the wheel latch 37 stops in a second position within the guide hole 64. The second position is outside the operating area C1 of the rack 31.

[0056] If an operating force is applied to the trigger 71 and the push rod 70 is pressed against the object W1, the control circuit 75 causes the electric motor 15 to rotate forward. Thus, the wheel 39 rotates towards... Figure 3 The device rotates counterclockwise D3, and the pin 42, which engages with the protrusion 32, applies a force to the impact part 12 in the second direction D2. The impact part 12 overcomes the air pressure in the pressure chamber 26 and moves from the standby position toward the top dead center in the second direction D2, that is, it rises. If the impact part 12 rises, the air pressure in the pressure chamber 26 increases.

[0057] If the wheel 39 rotates further, the pin 42, which engages with the protrusion 32, receives a radial inward force from the protrusion 32, and the pin 42 is released from the protrusion 32. Specifically, the pin 42 is released from the protrusion 32 located closest to the front end of the transmission plate 29. Then, the impact section 12 actuates in the first direction D1 due to the air pressure in the pressure chamber 26, i.e. Figure 5 As shown, it descends. Released from protrusion 32, pin 42 overcomes the force of spring 66 and moves within guide hole 64, pin 42 being pressed against limit member 65. Then, limit member 65 elastically deforms, and pin 42 passes over limit member 65, in... Figure 5 Stop at the second position shown.

[0058] The pin 42, held in the second position by the wheel latch 37, revolves outside the operating range C1 of the rack 31. Therefore, during the stroke of the impact section 12 as it descends from the top dead center, the rack 31 will not contact the pin 42. If the impact section 12 descends, then... Figure 5 As shown, the transmission plate latch 35 disengages from the contact portion 33, and the transmission plate latch 35 moves counterclockwise in the direction D5 due to the force of the spring 81. Therefore, the wheel latch 37 moves out of the arrangement area of ​​the wheel 39 in a plane perpendicular to the rotation center line B1. The transmission plate latch 35 contacts the limiting member 41 and stops, and the wheel latch 37 stops in the first position. If the impact portion 12 descends, the transmission plate 29 impacts the nail 69 supplied to the injection portion 51. The impacted nail 69 is driven into the target member W1.

[0059] After nail 69 is driven into object W1, as Figure 1 As shown, piston 28 collides with buffer 34. Buffer 34 absorbs a portion of the kinetic energy of impact 12. During the movement of impact 12 from top dead center to bottom dead center and until impact 12 stops at bottom dead center, pin 42, which stops at the second position, revolves outside the movement area of ​​rack 31. Therefore, during the downward stroke of impact 12, rack 31 does not contact pin 42. In particular, Figure 5 The pin 42 (42Y) shown is held in a second position where it cannot engage with the rack 31.

[0060] If nail 69 is driven into object W1, push rod 70 will disengage from object W1 due to its reaction. However, control circuit 75 will cause electric motor 15 to continue rotating. Therefore, as Figure 8 As shown in (A), a pin 42 (42Z) located further rearward than the second position in the rotational direction of the wheel 39 enters between protrusions 32. This pin 42 (42Z) stops in the first position within the guide hole 64, engaging with protrusions 32 as the wheel 39 rotates. Furthermore, during the engagement of the previously engaged pin 42 with protrusions 32, the next pin 42 engages with protrusions 32; if the next pin 42 engages with protrusions 32, the previously engaged pin 42 is released from protrusions 32. Moreover, the pin 42 released from protrusions 32 moves radially inward within the guide hole 64 due to the component of the load received from protrusions 32, and stops in the second position after passing the limit member 65.

[0061] Thus, by repeatedly engaging and disengaging the pin 42 from the protrusion 32, the impact part 12 rises from the lower dead center. Figure 8 As shown in (B), pin 42, which is stopped in the second position, is pressed against release part 67 due to the rotation of wheel 39. Pin 42 is exerted radially outward by release part 67 within guide hole 64, and pin 42 passes over limit member 65. Pin 42, having passed limit member 65, moves within guide hole 64 due to the force of spring 66 and stops in the first position.

[0062] If the impact portion 12 rises further, the contact portion 33 is pressed against the transmission plate latch 35. The transmission plate latch 35 overcomes the force of the spring 81 and moves clockwise in the direction D5. Furthermore, the wheel latch 37 moves counterclockwise from the first position. Therefore, a portion of the wheel latch 37 enters the configuration area of ​​the wheel 39 in a plane perpendicular to the rotation center line B1. A portion of the wheel latch 37 is pressed against a pin 42, which overcomes the force of the spring 66 and moves radially inward within the guide hole 64 from the first position onto the wheel 39.

[0063] If the control circuit 75 detects that the impact unit 12 has reached the standby position, it stops the electric motor 15. Therefore, the impact unit 12 stops in the standby position. If the impact unit 12 stops in the standby position, the transmission plate latch 35... Figure 3 The wheel stops as shown, and the wheel latch 37 stops in the second position. A portion of the wheel latch 37 presses the pin 42 past the limit member 65 and stops in the second position. The adjustment mechanism 77 has the construction and function of switching the radial position of the pin 42 on the wheel 39 between the first position and the retracted position.

[0064] Furthermore, if wheel 39 is in Figure 2 and Figure 3 When the wheel rotates counterclockwise D3 and stops, the multiple pins 42 sequentially and repeatedly move from the first position to the second position using the wheel latch 37. In this embodiment, the number of pins 42 is less than the number of protrusions 32. That is, the correspondence between pins 42 and protrusions 32 is not one-to-one. Specifically, all pins 42 and protrusions 32 that act as engagement and disengagement targets change with each rotation of the wheel 39, alternately functioning as pins 42Y, 42X, and 42Z.

[0065] The nailing machine 10 of this embodiment has the following effects.

[0066] [First Effect] Each of the seven pins 42 can move independently in the radial direction of the wheel 39 within the guide hole 64. Therefore, if the load on the pin 42 increases from the engaged protrusion 32, it overcomes the force of the spring 66 and moves radially inward towards the wheel 39, releasing the pin 42 from the protrusion 32. Thus, the load on any of the seven pins 42 can be reduced. In particular, when the impact part 12 reaches the top dead center and the pin 42 is released from the protrusion, the maximum value of the load borne by the pin 42 is reduced. Furthermore, the increased load on the pin 42 includes situations where the pin 42 does not properly engage with the protrusion 32.

[0067] [Second Effect] The seven pins 42 are arranged at equal intervals in the rotation direction of the wheel 39. Furthermore, the number of pins 42 is seven, which is less than the number of protrusions 32 (nine). Therefore, the rotation angle of the wheel 39 when the impact part 12 rises from the bottom dead center to the top dead center can be set to an angle larger than 360 degrees, which is equivalent to one revolution.

[0068] In other words, the rotation of the wheel 39 from the moment the pin 42 engages with the protrusion 32 and the impact part 12 moves from the lower dead center to the second direction D2 until the impact part 12 reaches the upper dead center and the pin 42 is released from the protrusion 32 and the impact part 12 moves to the first direction D1 is more than one revolution. Specifically, the rotation of the wheel 39 exceeds 360 degrees, equivalent to one revolution, but is less than 720 degrees, equivalent to two revolutions.

[0069] Therefore, the distance by which the impact section 12 rises is greater than or equal to the full circumference of the circumference of the plurality of pins 42 provided on the wheel 39, which can suppress the enlargement of the outer diameter, i.e., the diameter, of the wheel 39. Furthermore, since the wheel 39 rotates at an angle greater than 360 degrees, the stroke of the impact section 12 from the bottom dead center to the top dead center is increased, which can maximize the length of the nail 69 that can be impacted by the impact section 12.

[0070] Furthermore, during the multiple rotations of the wheel 39, all pins 42 except for one pin 42 (42Y) located behind the pin 42 (42X) that engages with the rack 31 at the moment the impact section 12 reaches the top dead center remain in the first position where they can engage with the rack 31. That is, when the impact section 12 descends, the pins 42 can be positioned in the second position outside the operating range C1 of the rack 31. Therefore, when the impact section 12 is actuated, it is not necessary for the pins 42 to retract from the operating range C1 traversed by the rack 31 beforehand. In other words, when the impact section 12 is actuated, the situation of "the wheel 39 spinning freely during the period when the pins 42 move from the second position to the first position" can be suppressed. Therefore, the time from the bottom dead center to the top dead center of the impact section 12 can be shortened.

[0071] [Third Effect] Since the number of pins 42 is different from the number of protrusions 32, each pin 42 cannot be specifically matched with a protrusion 32. Therefore, regardless of the position of the pins 42 in the rotation direction of the wheel 39 and the position of the protrusions 32 in the action direction of the impact part 12, the wheel 39 is rotated, thereby enabling the impact part 12 to move from the lower dead center to the upper dead center according to the length of the rack 31.

[0072] [Fourth Effect] The pin 42 among the plurality of pins 42 that engages with the protrusion 32 when the impact portion 12 is at its top dead center and is released from the protrusion 32 at the top dead center of the impact portion 12 bears the maximum load, i.e., the maximum load. Here, since the number of pins 42 is different from the number of protrusions 32, the pin 42 bearing the maximum load varies with the number of times the impact portion 12 rises each time. Therefore, wear and deformation of specific pins 42 can be suppressed, and the lifespan of each pin 42 can be extended.

[0073] [Another example of institutional adjustment] Figure 9 (A) and Figure 9 (B) shows that it is set in Figure 1Other examples of the adjustment mechanism of the nailing machine 10. The adjustment mechanism 82, in addition to the drive plate latch 35, also includes a solenoid 83, a plunger 84, and a pressing member 85. The solenoid 83 has a coil through which current flows. The plunger 84 is made of a magnetic material. Furthermore, a spring is provided to apply force to the plunger 84 in the direction away from the wheel 39. The pressing member 85 is mounted on the front end of the plunger 84. The pressing member 85 is made, for example, of metal or synthetic resin. The plunger 84 and the pressing member 85 are capable of movement in the direction along the imaginary line A3. Figure 9 (A) and Figure 9 (B) is an example of imaginary line A1 intersecting with imaginary line A3, for example, intersecting at approximately a 90-degree angle.

[0074] like Figure 7 As shown, a switch 86 is provided in the circuit between the solenoid 83 and the power supply unit 14. Furthermore, a transmission plate latch detection sensor 87 is disposed within the housing 11. The transmission plate latch detection sensor (plate latch detection sensor) 87 detects the position of the transmission plate latch 35 and outputs a signal. The control circuit 75 processes the signal from the transmission plate latch detection sensor 87 and switches the switch 86 on and off. If the switch 86 is on, current is supplied from the power supply unit 14 to the solenoid 83. If the switch 86 is off, the current supply to the solenoid 83 is stopped.

[0075] If the current supply to the solenoid 83 is stopped, the spring-loaded pressing member 85 stops in the first position away from the wheel 39. If current is supplied to the solenoid 83, a magnetic attraction is generated, and the plunger 84 moves towards the wheel 39 against the spring force. If the pressing member 85 moves into the rotation area of ​​the wheel 39, the plunger 84 stops in the second position. The solenoid 83 is the actuator that switches the position of the plunger 84 between the first and second positions. If the adjusting mechanism 82 is provided... Figure 1 The nailing machine 10 does not have wheel latches 36 and 37.

[0076] The use of the nailing machine 10 with the adjustment mechanism 82 is as follows. If the impact part 12 stops in the standby position, the pin 42 (42X) engages with the protrusion 32, and the pin 42X engaged with the protrusion 32 remains in the first position and within the operating range C1. Furthermore, the contact part 33 is pressed against the transmission plate latch 35, and the transmission plate latch 35 stops in the operating position. The transmission plate latch detection sensor 87 detects that the transmission plate latch 35 is in the operating position and outputs a signal. The control circuit 75 processes the signal from the transmission plate latch detection sensor 87 and turns on the switch 86.

[0077] Therefore, current is supplied to solenoid 83, and plunger 84 moves towards wheel 39. For example... Figure 9As shown in (A), the pressing member 85 moves into the rotational region of the wheel 39 and is pressed against the pin 42 (42Y). The pin 42 (42Y) is located one position behind the pin 42X in the rotational direction of the wheel 39. Thus, the pin 42Y moves from the first position to the second position against the force of the spring 66 and remains in the second position. Therefore, the plunger 84 stops in the second position.

[0078] If an operating force is applied to the trigger 71 and the push rod 70 is pressed against the object W1, the control circuit 75 causes the electric motor 15 to rotate forward. Then, the impact part 12 rises from the standby position toward the top dead center, and the impact part 12 reaches... Figure 9 The top dead center is shown in (A). Then, the impact section 12 descends from the top dead center.

[0079] If the impact section 12 descends, then as Figure 9 As shown in (B), the transmission plate latch 35 disengages from the contact portion 33 and stops upon contact with the limiting member 41. The transmission plate latch detection sensor 87 detects the disengagement of the transmission plate latch 35 from the contact portion 33 and outputs a signal. Then, the control circuit 75 disconnects the switch 86. Consequently, the power supply to the solenoid 83 is stopped, and the plunger 84 moves in the direction away from the wheel 39. The plunger 84... Figure 9 The first position shown in (B) is stopped. As a result, the pressing component 85 stops outside the rotation area of ​​the wheel 39.

[0080] During the descent of the impact section 12, the protrusion 32 does not contact the pin 42 (42Y). As the impact section 12 descends, the transmission plate 29 impacts the nail 69 supplied to the ejection section 51. After the nail 69 is driven into the target piece W1, the impact section 12 reaches the lower dead center. After the impact section 12 reaches the lower dead center, the electric motor 15 rotates. Therefore, the impact section 12 rises from the lower dead center. If the impact section 12 rises and the contact part 33 is pressed against the transmission plate latch 35, the transmission plate latch 35 actuates against the force of the spring 81. Furthermore, if the transmission plate latch detection sensor 87 detects the actuation of the transmission plate latch 35, the control circuit 75 turns on the switch 86. Then, current is supplied to the solenoid 83, and the plunger 84 moves towards the wheel 39.

[0081] Therefore, the pin 42 (42Y) pressed by the pressing member 85 moves from the first position to the second position and stops, and the plunger 84 stops at the second position. If the control circuit 75 detects that the impact member 12 has reached the standby position, it stops the electric motor 15. Furthermore, if the wheel 39 repeats the operation... Figure 9When the action of rotating counterclockwise D3 and stopping in (A) occurs, the multiple pins 42 sequentially repeat the action of being pressed by the pressing component 85 and moving from the first position to the second position. That is, all pins 42 alternately function as pins 42X and 42Y. The adjustment mechanism 82 may also have a servo motor instead of the solenoid 83. The plunger 84 is actuated by the servo motor. That is, the actuator that actuates the plunger 84 can be either the solenoid 83 or the servo motor. The nailing machine 10 with the adjustment mechanism 82 can achieve the first, second, third, and fourth effects described above.

[0082] [Other examples of turbine wheels] Figure 10 , Figure 11 (A) Figure 11 (B) Figure 12 (A) Figure 12 (B) Figure 13 (A) Figure 13 (B) and Figure 14 Showing the setting at Figure 1 Another example of the wheel 39 of the nailing machine 10 shown. The boss portion 60 has a plurality of support holes 63 arranged in the rotation direction. The pin retaining member 61 has a plurality of guide holes 78 arranged in the rotation direction. The plurality of support holes 63 and the plurality of guide holes 78 are respectively provided at the same position in the rotation direction of the wheel 39. Each guide hole 78 is provided within a predetermined range in the rotation direction of the wheel 39, and is displaced radially in relation to the positional displacement in the rotation direction of the wheel 39.

[0083] The number of support holes 63 is the same as the number of guide holes 78. Pins 42 are respectively disposed in the support holes 63 and guide holes 78. Pins 42 can move independently within the support holes 63 and guide holes 78. If pins 42 move within the support holes 63 and guide holes 78 in the rotational direction of the wheel 39, the radial position of pins 42 on the wheel 39 changes. Figure 13 As shown in (B), the first position is when pin 42 (42X) is located on the outermost side of the radial direction of wheel 39 within guide hole 78. Figure 12 As shown in (B), the second position is when pin 42 is located at the innermost point in the radial direction of wheel 39 within guide hole 78. With all pins 42 in the second position, the seven pins 42 are spaced apart in the rotational direction of wheel 39. Specifically, the seven pins 42 are arranged at equal intervals in the rotational direction of wheel 39 on the same circumference centered on rotation center line B1.

[0084] Furthermore, if we imagine that two adjacent pins 42 are in the first position in the rotation direction of the wheel 39, such as Figure 13As shown in (B), there is a distance L1 between the centers Q2 of the pins 42. On the other hand, adjacent protrusions 32 in the transmission plate 29 are arranged at intervals of L2 along the imaginary line A1. Moreover, the interval L2 is larger than the distance L1. Furthermore, if we imagine that the multiple pins 42 are in a first position, the interval between the pins 42 in the rotation direction of the wheel 42 is equal. The interval between the pins 42 can be defined, for example, as the arc length of an imaginary circle passing through the center Q1. The interval between the pins 42 can be defined, for example, as the arc length of the outer surfaces of the pins 42 in an imaginary circle passing through the center Q1 of the pins 42.

[0085] Furthermore, a plurality of springs 79 are provided on the boss portion 60. Each spring 79 individually applies force to the pin 42 radially inward toward the wheel 39. A buffer member 100 is mounted on the outer circumferential surface of the rotating shaft 40. The buffer member 100 is a ring made of synthetic rubber, and the pin 42, which is stressed by the springs 79, contacts the buffer member 100 and stops at a second position.

[0086] Pin guide 90 is set Figure 1 The pin guide 90 is fixedly disposed within the cylindrical portion 52. The pin guide 90 can be made of metal or synthetic resin. Two pin guides 90 are spaced apart along the rotation center line B1. A wheel 39 is disposed between the pin guides 90. The pin guide 90 is rod-shaped, and its front end 91 is disposed radially within the configuration area of ​​the guide hole 78 on the wheel 39. The other end of the pin guide 90 is fixed to... Figure 1 The nose section 13. (For example) Figure 13 (A) and Figure 13 As shown in (B), a guide surface 92 is provided at the front end 91. The guide surface 92 is curved. If the wheel 39 is in Figure 12 If (B) is rotated counterclockwise, at least one pin 42 will contact the front end 91 and rest on the guide surface 92, and the pin 42 will extend beyond the front end 91.

[0087] also, Figure 11 (A) Figure 11 (B) Figure 12 (A) Figure 12 (B) Figure 13 (A) Figure 13 Pin 42 shown in (B) and Figure 3 , Figure 6 (A) Figure 6 Pin 42 of (B) similarly has a large diameter portion 42A and a small diameter portion 42B. However, Figure 11 (A) Figure 11 (B) Figure 12 (A) Figure 12 (B) Figure 13 (A) Figure 13 The pin 42 shown in (B) omits the large diameter portion 42A and the small diameter portion 42B. It has... Figure 10 The following is an example of how the nailing machine 10 with the shown wheel 39 is used. If the impact unit 12 is stopped in the standby position, then... Figure 11 As shown in (A), a pin 42, specifically pin 42X, engages with a protrusion 32. Pin 42X is forced outward toward the wheel 39 by a component of the external force received from protrusion 32, and stops in a first position. Pin 42X, stopped in the first position, is within the range of motion C1.

[0088] In the rotational direction of the wheel 39, pin 42, i.e., pin 42Y, located one position behind pin 42X, contacts the pin guide 90 and stops at a position further inward than the first position. The other five pins 42, excluding pins 42X and 42Y, are released from the protrusion 32, separate from the pin guide 90, and stop at a second position. The pins 42 stopped at the second position are outside the operating range C1. Furthermore, if the wheel 39... Figure 11 When (A) rotates counterclockwise in the direction D3, the impact part 12 rises from the standby position to the upper stop point. Before pin 42X is released from protrusion 32, pin 42Y moves along guide surface 92 to the first position, and if pin 42Y passes the front end 91, pin 42Y moves from the first position to the second position by the force of spring 79. Furthermore, a pin 42 located one position behind pin 42Y in the rotation direction of wheel 39 contacts the front end 91 and moves from the second position toward the first position.

[0089] In the impact zone 12 Figure 11 After reaching the top dead center as shown in (B), if pin 42X is released from protrusion 32, then the impact part 12 will... Figure 13 As shown in (A), the impact part 12 descends due to the air pressure in the pressure chamber 26. If the impact part 12 descends, the transmission plate 29 impacts the nail 69. The impacted nail 69 is driven into the target piece W1. After the nail 69 is driven into the target piece W1, the impact part 12... Figure 13 As shown in (B), it stops at the bottom dead center. During the stroke of the impact section 12 as it descends from the top dead center to the bottom dead center, all pins 42 are outside the operating range C1 of the rack 31. Therefore, during the stroke of the impact section 12 as it descends from the top dead center, the rack 31 does not contact the pins 42. In particular, pins 42Y remain in a second position where they cannot engage with the rack 31.

[0090] After the impact section 12 stops at the bottom dead center, if Figure 13When the (B) wheel 39 rotates counterclockwise in the direction D3, the pin 42, i.e., pin 42X, which moves to the first position within the guide hole 78 via the pin guide 90, engages with the protrusion 32 before passing the front end 91. Then, the impact part 12 rises from the lower dead center. If the impact part 12... Figure 11 When the pin 42 reaches the standby position as shown in (A), the wheel 39 stops. In this way, the pin guide 90 and the spring 79 function as an adjustment mechanism to move the pin 42 from the first position to the second position. Furthermore, if the wheel 39 repeats the operation... Figure 11 When (A) rotates counterclockwise D3 and stops, multiple pins 42 repeatedly engage and disengage relative to the front end 91 of the pin guide 90. That is, all pins 42 alternately function as pins 42X and 42Y. When Figure 1 The nailing machine 10 shown has Figure 10 When the machine wheel 39 and pin guide 90 are shown, the nailing machine 10 can achieve the first, second, third and fourth effects mentioned above.

[0091] Furthermore, the spacing L2 is larger than the distance L1. Therefore, in the impact section 12, as... Figure 11 After reaching the top dead center as shown in (B), and before pin 42X is released from protrusion 32, pin 42Y completes its movement from the first position to the second position. Therefore, contact between rack 31 and pin 42 can be reliably prevented. Furthermore, the timing of pin 42Y's movement from the first position to the second position can be varied by adjusting the configuration range of the front end 91 of pin guide 90 in the rotational direction of wheel 39. In use... Figure 13 The principle that the pins 42 are equally spaced in the direction of rotation of the wheel 42 when the multiple pins 42 are in the first position, as described in (B), also applies. Figure 3 and Figure 6 (A) Figure 6 The spacing between the pins 42 disclosed in (B) is as follows.

[0092] [Supplementary Explanation] Examples of the technical meanings of the items described in this embodiment are as follows: The nailing machine 10 is an example of a nailing machine. The nail 69 is an example of a fastener. The injection unit 51 is an example of an injection unit. The first direction D1 is an example of a first direction. The second direction D2 is an example of a second direction. The impact unit 12 is an example of an impact unit. The rack 31 is an example of a rack. The wheel 39 is an example of a rotating component. The seven pins 42 are an example of multiple engaging components. Pin 42X is an example of a first engaging component. Pin 42Y is an example of a second engaging component. In this embodiment, not only does any one pin 42 function as a first engaging component, but only one pin 42 functions as a second engaging component. All pins 42 function as both first and second engaging components. The nine protrusions 32 are an example of multiple protrusions.

[0093] The accumulator 18 forming the pressure chamber 26 and the cylinder 27 are examples of a drive unit. The spring 66 and pin guide 90 are examples of a position-changing component. The wheel latch 37, transmission plate latch 35, and spring 79 are examples of a moving component. The wheel latch 37 is an example of a first contact component. The transmission plate latch 35 is an example of a second contact component. The seven guide holes 64 are an example of multiple guides. The limiter 65 is an example of a limiter. The release part 67 is an example of a release part.

[0094] In this embodiment, the "equal interval" showing the position of the pin 42 in the rotational direction of the wheel 39 and the "equal interval" showing the position of the protrusion 32 provided on the transmission plate 29 can be either "approximately equal interval" or "completely equal interval," respectively. Furthermore, "equal interval" can also be defined as "constant interval" or "uniform interval." In this case, "constant interval" can be either "completely constant interval" or "approximately constant interval." Similarly, "uniform interval" can be either "completely uniform interval" or "approximately uniform interval." That is, "equal," "constant," and "uniform" all include the component's machining error, assembly error, dimensional tolerance, etc.

[0095] The fastener is not limited to the embodiment disclosed in the accompanying drawings, and various modifications can be made without departing from its spirit. For example, the fastener impacted by the action of the impacting part includes, in addition to nails, arched rivets and thumbtacks. That is, the fastener includes a nail hammer for driving in arched rivets and a thumbtack machine for driving in thumbtacks. The rotating parts include, in addition to the machine wheel, a rotating shaft, pulleys, etc. The first engaging part includes, in addition to the pin, a shaft.

[0096] The drive unit that moves the impact part in the first direction can also be a metal spring, synthetic rubber, or a magnet, instead of a pressure accumulator filled with a compressible fluid. The metal spring or synthetic rubber uses elastic restoring force to move the impact part in the first direction. When the drive unit is a magnet, the impact part is made of a magnetic material, such as iron or steel. The magnet uses attractive or repulsive force to move the impact part in the first direction. The guide part provided on the rotating component can be any one of a guide hole, guide groove, guide rail, or guide wall. The power supply that applies voltage to the electric motor can be any one of a DC power supply or an AC power supply. The number of pins can be more than seven or less than seven. The number of protrusions can be more than nine or less than nine. The number of pins can be set to be less than the number of protrusions. Furthermore, a "rack" can be defined as an "engaged part" where multiple engaging components engage and disengage individually.

[0097] The first position of the engaging member disclosed in this embodiment can also be defined as an initial position or a position where engagement is possible. The second position of the engaging member can also be defined as a retracted position or a position where engagement is not possible. The engaging member in the first position engages with the rack when the rotating member rotates. The engaging member in the second position does not engage with the rack even when the rotating member rotates. In the radial direction of the rotating member, the first position is further outward than the second position. Moreover, if the engaging member is in the first position in the radial direction of the rotating member and the engaging member is within the operating range C1, then the engaging member can engage with the rack. Conversely, if the engaging member is in the first position in the radial direction of the rotating member and the engaging member is outside the operating range C1, then the engaging member cannot engage with the rack. In addition, when the impact part moves in the first direction, at least one engaging member needs to move from the first position to the second position by means of the adjustment mechanism.

[0098] Symbol Explanation

[0099] 10—Nail hammer, 12—Impact part, 18—Accumulator, 27—Cylinder, 31—Rack, 32—Protrusion, 35—Transmission plate latch, 37—Wheel latch, 39—Wheel, 42—Pin, 51—Injection part, 64—Guide hole, 65—Limiting element, 66, 79—Spring, 67—Release part, 69—Nail, 90—Pin guide, D1—First direction, D2—Second direction.

Claims

1. An injection machine, comprising: The injection section supplies fasteners to the injection section; The impact section moves in a first direction and a second direction opposite to the first direction to impact the fastener supplied to the injection section. A rack, which is located at the aforementioned impact section; A rotating component, which is rotatably mounted; and Multiple engaging components are provided on the rotating component at intervals in the rotational direction of the rotating component, and are respectively engaged and released relative to the rack by the rotation of the rotating component. The aforementioned injection machine is characterized by, The positions of the aforementioned multiple engaging components on the aforementioned rotating component can respectively change between a first position in which they can engage with the aforementioned rack when the aforementioned rotating component rotates, and a second position in which the position of the aforementioned rotating component is different from the aforementioned first position and cannot engage with the aforementioned rack even when the aforementioned rotating component rotates. The aforementioned multiple engaging components include: A first engaging component, located in the first position, engages with the rack to transmit the rotational force of the rotating component to the impact portion, thereby causing the impact portion to move in the second direction. It also releases from the rack, causing the impact portion to move in the first direction. The second engaging component is located behind the first engaging component in the rotational direction of the rotating component. The aforementioned injection machine is further provided with a moving component that acts in contact with the aforementioned second engaging component, thereby moving the second engaging component from the aforementioned first position to the aforementioned second position. During the period from when the first engaging member is released from the rack and the impact portion moves in the first direction until the impact portion stops at the lower dead center, the second engaging member is located in the second position. Multiple of the aforementioned engaging components function as the first engaging component and also function as the second engaging component.

2. The injection machine according to claim 1, characterized in that, The aforementioned multiple engaging components located in the first position are equally spaced from each other.

3. The injection machine according to claim 1, characterized in that, All of the aforementioned engaging components are capable of moving between the first position and the second position, respectively.

4. The injection machine according to claim 1, characterized in that, The aforementioned impact element moves from the lower dead center in the second direction to the upper dead center, and then moves from the upper dead center in the first direction. The rotation amount of the aforementioned rotating component from the moment when the aforementioned first engaging component engages with the aforementioned rack and the aforementioned impact part moves in the aforementioned second direction from the aforementioned lower dead center until the aforementioned impact part reaches the aforementioned upper dead center and the aforementioned first engaging component releases from the aforementioned rack and the aforementioned impact part moves in the aforementioned first direction is more than one revolution.

5. The injection machine according to claim 1, characterized in that, The rack described above has a plurality of protrusions spaced apart in the direction of motion of the impact portion. The number of the aforementioned multiple engaging components is less than the number of the aforementioned multiple protrusions.

6. The injection machine according to claim 1, characterized in that, The aforementioned injection machine is further provided with a drive unit that causes the aforementioned impact part to move in the aforementioned first direction.

7. The injection machine according to claim 3, characterized in that, The aforementioned injection machine is further provided with a position changing component that moves all of the aforementioned multiple engaging components from the aforementioned second position to the aforementioned first position.

8. The injection machine according to claim 1, characterized in that, The aforementioned movable component has a first contact component capable of engaging and disengaging from the plurality of engaging components respectively. The first contact component contacts the second engaging component to move the second engaging component from the first position to the second position.

9. The injection machine according to claim 8, characterized in that, The aforementioned moving component also has a second contact component, which contacts the aforementioned impact portion and actuates to cause the aforementioned first contact component to actuate.

10. The injection machine according to claim 1, characterized in that, The aforementioned multiple engaging components include pins arranged along the rotation center line of the aforementioned rotating component.

11. The injection machine according to claim 1, characterized in that, The aforementioned rotating component has multiple guide portions that guide the movement of the plurality of engaging components between the first position and the second position. The aforementioned multiple guide portions each have a limiting member, which holds the aforementioned multiple engaging components in the aforementioned first position or the aforementioned second position respectively.

12. The injection machine according to claim 11, characterized in that, The aforementioned injection machine is further provided with a release part, which causes the plurality of engaging components, which are held in the first position or the second position by the aforementioned limiting member, to move from the second position to the first position.

13. An injection machine, comprising: The injection section supplies fasteners to the injection section; The impact section moves in a first direction and a second direction opposite to the first direction to impact the fastener supplied to the injection section. A rack, which is located at the aforementioned impact section; A rotating component, which is rotatably mounted; and Multiple engaging components are spaced apart on the rotating component in the rotational direction of the rotating component, and are respectively engaged and released relative to the rack. The aforementioned injection machine is characterized by, All of the aforementioned engaging components are movable between a first position and a second position on the rotating component, which is different from the first position. The first position is when the rotating component rotates, the engaging components engage with the rack, transmitting the rotational force of the rotating component to the impact part, thereby causing the impact part to move in the second direction. The second position is when, even if the rotating component rotates, the engaging components release from the rack and do not transmit the rotational force of the rotating component to the impact part. The aforementioned inserting machine is further provided with a moving component that acts by contacting a locking component located behind the locking component in the first position, thereby moving the locking component located behind the locking component in the first position from the first position to the second position.

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