Work machine

Abstract

The present invention improves the convenience of a work machine. This driving apparatus includes: an injection portion to which a fastener is supplied; a striking portion for striking the fastener supplied to the injection portion; a motor for driving the striking portion; and a power supply portion for supplying power to the motor. The driving apparatus further includes: a magazine portion for storing a plurality of the fasteners wound in a roll shape; a supply portion for supplying the fastener from the magazine portion to the injection portion; a solenoid 93 for driving the supply portion so as to supply the fastener; and a dustproof mechanism 94 for suppressing intrusion of dust into the solenoid 93.

Description

Work equipment

[0001] The present invention relates to a work machine such as a driving machine.

[0002] As an example of a work machine, a driving machine is known that has an ejection section, a magazine that stores multiple fasteners, a feeder that supplies fasteners from the magazine to the ejection section, and an impact section that strikes the fasteners placed in the ejection section.

[0003] For example, Patent Document 1 discloses a solenoid as a member for driving a feeder of a fastener driver.

[0004] Japanese Patent Application Laid-Open No. 2022-72885

[0005] In a driving machine such as that described in Patent Document 1, dust is generated from the mating material during driving, and the dust also adheres to the solenoid, but Patent Document 1 does not mention the dustproofness of the solenoid.

[0006] The driving machine of Patent Document 1 only describes a cylindrical storage portion as the magazine, and this storage portion is connected to the motor housing portion.

[0007] Although Patent Document 1 does not specifically describe the routing of the wiring connected to the solenoid terminal, in the driver's structure in Patent Document 1, the magazine is connected to the motor housing, so the wiring connected to the solenoid terminal must pass through the magazine's storage section. In this case, the length of the wiring connected to the solenoid terminal becomes longer and the wiring is more likely to bend, making it more susceptible to breakage. As a result, there is concern that the durability of the solenoid may be reduced.

[0008] Therefore, there is a demand for improving the convenience of the driving machine of Patent Document 1 by improving the dust resistance and durability of the solenoid.

[0009] An object of the present invention is to provide a work machine with improved convenience.

[0010] A work machine according to one embodiment includes an ejection section to which fasteners are supplied, an impact section that strikes the fasteners supplied to the ejection section, a magazine section that stores a plurality of the fasteners wound in a roll, a supply section that supplies the fasteners from the magazine section to the ejection section, a solenoid that drives the supply section to supply the fasteners, and a dustproof mechanism that prevents dust from entering the solenoid.

[0011] A work machine according to another embodiment includes an ejection section to which fasteners are supplied, an impact section that impacts the fasteners supplied to the ejection section, a magazine section that stores a plurality of the fasteners wound in a roll, a supply section that supplies the fasteners from the magazine section to the ejection section, a solenoid that drives the supply section to supply the fasteners, a plate-shaped base section connected to the ejection section, a cover that is assembled to the base and stores the solenoid and the supply section between the base and the cover, a housing that stores the impact section and a motor that drives the impact section, a control section that controls the motor, and wiring that connects the control section to the terminals of the solenoid, and the magazine section has a cylindrical storage section that stores a plurality of the fasteners, and the cover, and the storage section and the cover are each connected to the housing, and the wiring is routed from inside the cover into the housing without passing through the storage section.

[0012] According to the present invention, the convenience of the work machine can be improved.

[0013] 1 is a right side view showing the structure of a working machine according to an embodiment of the present invention. FIG. 2 is a right side view showing the structure of the working machine of FIG. 1 with the solenoid cover removed. FIG. 3 is a side cross-sectional view showing the internal structure of the working machine of FIG. 1. FIG. 4 is a cross-sectional view showing the structure cut along line A-A in FIG. 1. FIG. 5 is a perspective view showing the structure of the supply unit of the working machine of FIG. 1. FIG. 6 is a perspective view showing the structure of a solenoid assembled to the supply unit of FIG. 5. FIG. 7 is a plan view showing the structure of the solenoid of FIG. 6. FIG. 7 is a cross-sectional view showing the structure cut along line B-B in FIG. 7. FIG. 7 is a cross-sectional view showing the structure cut along line CC in FIG. 7. FIG. 8 is a development view showing the internal structure of the solenoid of FIG. 6. FIG. 8 is an enlarged partial cross-sectional view showing the soldering structure of the coil terminal in the solenoid of FIG. 6. FIG. 9 is a cross-sectional view showing the structure of the solenoid of FIG. 5 when the plunger is released, cut at the coil terminal connection portion. FIG. 9 is a cross-sectional view showing the structure of the solenoid of FIG. 5 when the plunger is released, cut at the tapping screw portion. FIG. 10 is a cross-sectional view showing the structure of the solenoid of FIG. 5 when the plunger is attracted, cut at the coil terminal connection portion. 6 is a cross-sectional view showing the structure of the solenoid of FIG. 5 when the plunger is attracted, cut at a tapping screw portion. FIG. 7 is a cross-sectional view showing the structure of the solenoid of a modified example when the plunger is released, cut at a coil terminal connection portion. FIG. 8 is a cross-sectional view showing the structure of the solenoid of a modified example when the plunger is attracted, cut at a coil terminal connection portion.

[0014] 1 to 4 is an air-compression type working machine, and includes a housing 11, a striking unit 12, an injection unit 13, a power supply unit 14, an electric motor (motor) 15, a reduction gear mechanism 16, a winding mechanism 17, and a pressure accumulator vessel 18. As shown in FIGS. 1 to 3, the housing 11 is an outer shell element of the driving machine 10, and includes a cylinder case 19, a handle 20, a motor case 21, and an attachment unit 22. The cylinder case 19 is cylindrical, and the handle 20 and the motor case 21 are connected to the cylinder case 19.

[0015] In this embodiment, the direction in which the cylinder case 19 extends is defined as the up-down direction M1, and the direction perpendicular to the up-down direction M1 is defined as the left-right direction R1. Furthermore, the direction in which the motor case 21 extends and which is perpendicular to the up-down direction M1 and the left-right direction R1 is defined as the front-rear direction N1.

[0016] The working machine of this embodiment is a roll magazine type fastener driving machine 10. That is, the magazine unit 90 of the fastener driving machine 10 can store a roll of linked nails 78, which are fasteners, inside, and includes a drum-shaped canister (storage unit) 90a.

[0017] One end of the mounting part 22 of the driving tool 10 is connected to the handle 20, and the other end is connected to the motor case 21 via the extension part 21a. The rear part of the magazine part 90 is supported by one end of the mounting part 22, and is disposed below the extension part 21a and the mounting part 22.

[0018] The housing 11 is divided into two parts, one on the right side and one on the left side, called the right housing 11. The right housing 11 and the left housing 11 are arranged opposite each other, and are fixed together with a number of screws.

[0019] A head cover 25 is attached to the cylinder case 19, and a pressure accumulator vessel 18 having a cap 23 is disposed within the cylinder case 19 and the head cover 25. A cylinder 27 is housed within the cylinder case 19. The cylinder 27 is made of metal, such as aluminum or iron. A pressure chamber 26 is formed within the pressure accumulator vessel 18 and the cylinder 27. The pressure chamber 26 is filled with compressed gas. The pressure chamber 26 also serves as a biasing portion that biases the striking portion 12 downward in the up-down direction M1 by the compressed gas.

[0020] 3, the striking portion 12 is disposed from the inside to the outside of the housing 11 and has a piston 28 and a driver blade 29. The piston 28 is operable in the vertical direction M1 within the cylinder 27. The piston 28 and the driver blade 29 are provided as separate members and are connected to each other. This allows the striking portion 12 to strike the nail (fastener) 78 by moving downward in the vertical direction M1.

[0021] The injection unit 13 has a portion into which the nail 78 is supplied and includes a nose portion 32 that supports the cylinder 27. The driver blade 29 is disposed in the guide hole of the bumper support portion 31 and in the guide hole 36 of the bumper 35. The striking unit 12 is movable in the vertical direction M1 and strikes the nail 78 supplied to the injection unit 13. The striking unit 12 is constantly biased downward by the pressure of the compressed gas in the pressure chamber 26. The injection unit 13 has an injection path 37 in which the nail 78 is disposed, and the injection path 37 is provided along the vertical direction M1. The driver blade 29 is movable in the vertical direction M1 within the injection path 37.

[0022] The motor case 21 also houses the electric motor 15 and a reduction gear mechanism 16. The reduction gear mechanism 16 includes multiple planetary gear mechanisms and is a mechanism that decelerates and outputs the input elements from the electric motor 15 along a power transmission path. The power of the electric motor 15 is reduced by the reduction gear mechanism 16 and transmitted to the winding mechanism 17. The winding mechanism 17 converts the rotational force of the rotary shaft of the electric motor 15 into a force that urges the striking unit 12 upward in the vertical direction M1. Specifically, the winding mechanism 17 includes a pinwheel 50 that engages with the driver blade 29, and the pinwheel 50 rotates due to the power of the electric motor 15. That is, the pinwheel 50 rotates due to the power of the electric motor 15, and the rotation of the pinwheel 50 pushes the driver blade 29 upward in the vertical direction M1 after striking. The pinwheel 50 is provided in a pinwheel housing 33.

[0023] 3 and 4, the magazine unit 90 has a front end supported by the nose portion 32 via a feeder 96, and a rear end supported by the mounting portion 22. The magazine unit 90 has a drum-shaped canister 90a, a magazine cover 90n, and a lid portion 90j that covers the canister 90a. The magazine unit 90 stores a plurality of connected nails 78 (see FIG. 1) in a rolled state in a rolled nail storage portion 90m inside the canister 90a. The nails 78 are connected to each other by connecting elements such as adhesive or wire, and the connected nails 78 are arranged in the canister 90a in a rolled state so as to be wound around the shaft portion 90k of the rolled nail storage portion 90m of the canister 90a. In other words, the nails 78 connected to each other by connecting elements and wound in a roll are stored in the rolled nail storage portion 90m of the canister 90a of the magazine unit 90. The nails 78 connected by the connecting elements are then fed from the canister 90 a and sent to the injection path 37 of the injection unit 13 by the feeder 96 .

[0024] A dial-type adjuster 52 is attached to the injection unit 13 for adjusting the driving depth of the nail 78 by the driving machine 10. That is, the worker can adjust the driving depth of the nail 78 by the driving machine 10 by turning the adjuster 52 during the driving operation.

[0025] A push lever 79 is also attached to the nose portion 32. The push lever 79 can be operated within a predetermined range in the up-down direction M1 relative to the nose portion 32. The push lever 79 is a switch member. Specifically, the push lever 79 can be moved from a first position (switch-off position) to a second position (switch-on position) by contacting a mating member. The push lever 79 is constantly biased downward in the up-down direction M1 by an elastic member (not shown). Therefore, when the tip of the push lever 79 is not pressed against the mating member, it is always in the first position (switch-off position). On the other hand, when the tip of the push lever 79 is pressed against the mating member and moves to a predetermined position (second position) above the first position, the switch is turned on.

[0026] The driving tool 10 is also provided with a trigger 53 and a trigger sensor 85. The trigger 53 and the trigger sensor 85 are provided on the handle 20. The trigger sensor 85 detects whether or not an operating force is applied to the trigger 53, and outputs a signal according to the detection result.

[0027] The driving tool 10 also includes a controller (control unit) 82, which is provided within the mounting unit 22 and mainly controls the operation of the electric motor 15. The controller 82 has a microprocessor. A circuit board with an inverter circuit is provided within the motor case 21. The inverter circuit includes multiple switching elements, each of which can be turned on and off. By controlling the inverter circuit, the controller 82 controls the rotation and stopping of the electric motor 15, as well as the rotation speed and rotation direction of the electric motor 15.

[0028] The power supply unit 14, which supplies power to the electric motor 15, can be attached to and detached from the mounting portion 22. The power supply unit 14 has a housing case 76 and a battery housed in the housing case 76. The battery has a plurality of battery cells. These battery cells are secondary batteries that can be charged and discharged, and any known battery cell can be used, such as a lithium-ion battery, a nickel-metal hydride battery, a lithium-ion polymer battery, or a nickel-cadmium battery.

[0029] Next, an example of the operation of the driving tool 10 of this embodiment will be described. When the controller 82 detects at least one of the following conditions: no operating force is being applied to the trigger 53, or the push lever 79 is not being pressed against the target material, the controller 82 stops supplying power to the electric motor 15. As a result, the electric motor 15 stops, and the striking unit 12 remains stopped in the standby position.

[0030] When the controller 82 detects that an operating force is being applied to the trigger 53 and that the push lever 79 is being pressed against the target material 30, it applies voltage from the power supply unit 14 to the electric motor 15, causing the electric motor 15 to rotate in the forward direction, thereby starting the driving operation. In other words, unless the controller 82 detects both that an operating force is being applied to the trigger 53 and that the push lever 79 is being pressed against the target material, it will not output a signal to apply voltage from the power supply unit 14 to the electric motor 15, and the driving operation will not start.

[0031] When the driving operation starts, the electric motor 15 is started. The rotational force of the electric motor 15 is transmitted to the pinwheel 50 via the speed reducer 16. When the pinwheel 50 rotates in a predetermined direction, the impact part 12 rises. When the impact part 12 rises, the gas pressure in the pressure chamber 26 increases.

[0032] When the final pin in the rotation of the pinwheel 50 in a predetermined direction separates from the final rack of the driver blade 29, the striking portion 12 descends due to the gas pressure in the pressure chamber 26. As the striking portion 12 descends due to the gas pressure in the pressure chamber 26, the driver blade 29 strikes one nail 78 located in the injection path 37, and the nail 78 is driven into the mating material.

[0033] Next, the supply unit 91 that sends the nails 78 to the ejection unit 13 will be described. The supply unit 91 is a part that supplies the nails 78 from the magazine unit 90 to the ejection unit 13. As shown in Fig. 5, the supply unit 91 is provided with a solenoid 93 that drives the supply unit 91 to supply the nails 78 shown in Fig. 1. In detail, the supply unit 91 has a plunger 93d that moves forward and backward in the front-to-rear direction N1, the solenoid 93 that operates the plunger 93d when power is applied, a feeder arm 96a that reciprocates together with the plunger 93d, a feeder 96 that reciprocates together with the feeder arm 96a and sends the leading nail 78 to the ejection unit 13, and a spring 93e that biases the feeder arm 96a.

[0034] As a result, when the power supply to the solenoid 93 is turned off, the feeder 96 is urged forward in the front-to-rear direction N1 by the urging force of the spring 93e via the feeder arm 96a, and the plunger 93d moves forward. At this time, the feeder arm 96a moves forward in conjunction with the movement of the plunger 93d, and further, the feeder 96 also moves forward together with the feeder arm 96a, thereby feeding the leading nail 78 into the ejection unit 13.

[0035] Furthermore, when power is supplied to the solenoid 93, the plunger 93d is attracted by the solenoid 93, causing the plunger 93d to move rearward in the front-to-rear direction N1. As the plunger 93d moves rearward, the feeder arm 96a moves rearward against the biasing force of the spring 93e, and the feeder 96 moves rearward together with the feeder arm 96a, causing the feeder 96 to be positioned behind the second nail 78. As a result, the feeder 96 waits behind the second nail 78. The supply unit 91 including the solenoid 93 is covered by a bowl-shaped solenoid cover (cover) 93a, as shown in FIGS. 1, 4, and 5.

[0036] Next, the solenoid 93 of this embodiment will be described in detail using Figures 6 to 11. In the driving tool 10, dust is generated from the mating material during driving, so dust prevention measures are also required for the solenoid 93. Therefore, the driving tool 10 of this embodiment is provided with multiple dust prevention mechanisms 94 that prevent dust from entering the interior of the solenoid 93.

[0037] The structure of the solenoid 93 will now be described.

[0038] As shown in FIG. 6, the solenoid 93 is provided with two terminals 93f exposed to the outside. As shown in FIG. 7, one of the two terminals 93f is a positive terminal 93f, and the other is a negative terminal 93f. As shown in FIG. 10, the solenoid 93 is provided with a dustproof mechanism 94, a cylindrical yoke 93b whose terminal 93f side is closed by a wall 93i. That is, the yoke 93b is cylindrical and extends along the axis 93r. One end of the cylindrical yoke 93b is closed by a wall 93i, and two terminals 93f are arranged side by side at the end on this wall side. The yoke 93b is made of metal.

[0039] 8 and 9, the cylindrical yoke 93b accommodates therein a coil 93n connected to a terminal 93f. That is, one end 93s of the coil 93n is connected to the positive terminal 93f, and the other end 93s of the coil 93n is connected to the negative terminal 93f. As shown in FIG. 10, a wall 93i of the yoke 93b is provided with two holes 93j through which the end 93s of the coil 93n is inserted. The end 93s of the coil 93n connected to the positive terminal 93f is inserted through one of the holes 93j, and the end 93s of the coil 93n connected to the negative terminal 93f is inserted through the other hole 93j.

[0040] A bobbin 93k around which a coil 93n is wound is provided within the yoke 93b. The bobbin 93k has flanges 93p on both ends, with the coil 93n wound between one flange 93p and the other flange 93p. The bobbin 93k around which the coil 93n is wound is housed within the yoke 93b. The flange 93p located on the wall side of the bobbin 93k has two protrusions (wiring guides) 93q that respectively pass through two holes 93j in the wall 93i of the yoke 93b. The positive end 93s of the coil 93n is disposed on one of the protrusions 93q, and the negative end 93s of the coil 93n is disposed on the other protrusion 93q. The positive pole end 93s of the coil 93n is inserted into one of the holes 93j together with the protrusion 93q, and the negative pole end 93s of the coil 93n is inserted into the other hole 93j together with the protrusion 93q.

[0041] 8 and 9, the bobbin 93k has an elongated hole B1 therein that communicates with an opening on the opposite side to the terminal 93f side. The hole B1 is a hole into which the plunger 93d shown in FIG. 4 is drawn when the plunger 93d is attracted.

[0042] The solenoid 93 also has a disk-shaped holder 93c attached to the outer surface of the wall portion 93i of the yoke 93b on the side where the terminals 93f are arranged. That is, the disk-shaped holder 93c is arranged on the outer surface of the wall portion 93i of the yoke 93b. The holder 93c is a resin member integrally molded with the two terminals 93f. That is, the holder 93c is a disk-shaped member integrally molded with the two terminals 93f from resin. As a result, the two terminals 93f protruding outward along the thickness direction of the holder 93c are embedded in the disk-shaped resin holder 93c.

[0043] 3, the driving tool 10 is provided with a wire 38 having one end connected to the controller 82 and the other end connected to the terminal 93f of the solenoid 93. That is, the driving tool 10 has the wire 38 that can be connected to the terminal 93f of the solenoid 93. The wire 38 is provided with a connector 95 that is fitted into the terminal 93f of the solenoid 93. The connector 95 can be easily attached to and detached from the terminal 93f of the solenoid 93.

[0044] As shown in Fig. 10 , the yoke 93b has a cover member 93m that closes the opening on the side opposite to the side where the terminal 93f is located. This cover member 93m is, for example, disk-shaped and is sandwiched between the ends of the yoke 93b in the axial direction D2 of the yoke 93b. That is, as shown in Figs. 8 and 9 , the cover member 93m is crimped at crimping portions Q1 at the ends of the yoke 93b, and is sandwiched between the ends of the yoke 93b in the axial direction D2 in Fig. 10 . This closes the gap between the cover member 93m and the end of the yoke 93b, thereby increasing the dustproof effect and preventing the cover member 93m from falling off the yoke 93b.

[0045] 10, a hole 93z is formed in the center of the disk-shaped cover member 93m. An end of a bobbin 93k is fitted into this hole 93z, as shown in FIGS.

[0046] 7, the holder 93c has an opening 93g that exposes a terminal 93f, and an end 93s of the coil 93n is soldered to the terminal 93f within the opening 93g. That is, the disk-shaped holder 93c has two U-shaped openings 93g formed at radially opposing positions on the periphery of the holder 93c. In each of the two openings 93g, the end 93s of the coil 93n is connected to the terminal 93f by solder 80, as shown in FIG.

[0047] Additionally, below the terminals 93f of the two openings 93g, the holder 93c, the yoke 93b, the bobbin 93k, and the coil 93n are fixed with adhesive 81. This makes it possible to protect the coil 93n from being broken when the bobbin 93k comes into contact with the coil 93n in the event of vibration or impact.

[0048] Each of the two terminals 93f embedded in and exposed from the holder 93c is bent into an L-shape, with one end of each of the two terminals 93f exposed from the holder 93c and the other end exposed in the opening 93g where it is soldered to the coil 93n.

[0049] 9 and 10, the holder 93c and the bobbin 93k are fixed together by tapping screws 93h. As shown in FIG. 7, the fixing by the tapping screws 93h is performed at two locations in a radial direction perpendicular to the radial direction of the two openings 93g. The tapping screws 93h are screwed into the boss portion 93u of the flange portion 93p of the bobbin 93k, with the holder 93c and the yoke 93b interposed therebetween. As a result, when the tapping screws 93h are tightened, the holder 93c, the yoke 93b, and the bobbin 93k are integrated. At this time, the tapping screws 93h are inserted into the hole 93t in the wall portion 93i of the yoke 93b. In addition, a protrusion 93q is provided on the flange 93p of the bobbin 93k as a wiring guide, and the end of the coil 93n is positioned within this protrusion 93q, so that even if the holder 93c and the bobbin 93k are tightened with the tapping screw 93h, breakage of the coil 93n can be suppressed.

[0050] The solenoid 93 is assembled by winding the coil 93n around the bobbin 93k, pulling out the end 93s of the coil 93n from the bobbin 93k, and setting it in the yoke 93b. Thereafter, the cover member 93m is fitted, and the end of the yoke 93b is crimped to the cover member 93m.

[0051] Meanwhile, on the side of the yoke 93b where the terminal 93f is arranged, a holder 93c with the terminal 93f embedded therein is attached to the outer surface of the wall portion 93i of the yoke 93b. Here, the holder 93c is fixed to the bobbin 93k via the yoke 93b using tapping screws 93h. Thereafter, adhesive 81 is applied to an opening 93g of the holder 93c, and the holder 93c, yoke 93b, bobbin 93k, and coil 93n are fixed together with the adhesive 81. Furthermore, an end 93s of the coil 93n is cut to an appropriate length, and the end 93s of the coil 93n is soldered to the terminal 93f of the solenoid 93 using solder 80.

[0052] Next, the assembly of the solenoid 93 will be described.

[0053] 4, the supply unit 91 is provided with a dustproof mechanism 94 for the solenoid 93, including a plate-shaped tail cover (base) 92 connected to the ejection unit 13, and a solenoid cover (cover) 93a assembled to the tail cover 92 and accommodating the solenoid 93 and feeder 96 between the tail cover 92 and the solenoid cover 93a. That is, the solenoid cover 93a and the like are provided as the dustproof mechanism 94 for the solenoid 93, and cover the supply unit 91 including the solenoid 93 and feeder 96 together with the tail cover 92 and magazine cover 90n. In other words, the solenoid cover 93a, tail cover 92, and magazine cover 90n constitute the dustproof mechanism 94.

[0054] The solenoid cover 93a is bowl-shaped, and in the assembly direction D1 of the tail cover 92 and the solenoid cover 93a, the central axis A1 of the solenoid 93 is located inside the solenoid cover 93a. The terminal 93f of the solenoid 93 is located closer to the tail cover 92 than the central axis A1. In other words, the solenoid 93 is disposed such that the terminal 93f is located on the tail cover 92 side within the solenoid cover 93a.

[0055] Furthermore, the solenoid cover 93a can be attached and detached from the magazine cover 90n and the tail cover 92 without disassembling the housing 11. In other words, the solenoid cover 93a and the housing 11 are separately molded parts, and the solenoid cover 93a is provided independently from the housing 11. Therefore, the solenoid cover 93a can be attached and detached without disassembling the housing 11.

[0056] Furthermore, a wiring 38 is provided that connects the controller 82 and a terminal 93f of the solenoid 93, and a connector 95 (see FIG. 3) that is interposed between the wiring 38 and the terminal 93f of the solenoid 93 and that detachably connects the wiring 38 and the terminal 93f of the solenoid 93 is disposed inside the solenoid cover 93a. In other words, the connector 95 and a portion of the wiring 38, together with the supply unit 91 including the solenoid 93, are covered by the solenoid cover 93a.

[0057] The magazine unit 90 also has a cylindrical canister 90a that stores a plurality of nails 78 (see FIG. 1), a passage 90b for the nails 78 that are supplied from the canister 90a to the ejection unit 13, and a solenoid cover 93a. The magazine unit 90, which includes the canister 90a, the passage 90b, and the solenoid cover 93a, is connected to the motor case 21 of the housing 11, as shown in FIG. 1, and the wiring 38 is routed from the solenoid cover 93a into the motor case 21 of the housing 11 without passing through the canister 90a. That is, the wiring 38 connected to the terminal 93f of the solenoid 93 is routed into the motor case 21 of the housing 11 without passing through the canister 90a, and further routed to the mounting unit 22 via the extension 21a and connected to the controller 82.

[0058] Next, the plunger 93d of the solenoid 93 will be described.

[0059] 12 to 15, the solenoid 93 has a thin rod-shaped plunger 93d that is attracted into the solenoid 93. The plunger 93d is the part of the supply unit 91 that supplies nails 78 to the ejection unit 13. For example, when the power supply to the solenoid 93 shown in FIG. 4 is turned off, the feeder 96 is urged forward by the urging force of the spring 93e via the feeder arm 96a, causing the plunger 93d to move forward. At this time, the feeder arm 96a moves forward in conjunction with the movement of the plunger 93d, and further, the feeder 96 also moves forward together with the feeder arm 96a, feeding the leading nail 78 into the ejection unit 13.

[0060] On the other hand, when the power supply to the solenoid 93 is turned ON, the plunger 93d is attracted by the solenoid 93, causing the plunger 93d to move rearward (movement S1 shown in FIGS. 14 and 15). That is, a part of the plunger 93d is housed within the solenoid 93. At this time, as the plunger 93d moves rearward, the feeder arm 96a moves rearward against the biasing force of the spring 93e, and further, the feeder 96 moves rearward together with the feeder arm 96a and is positioned behind the second nail 78. As a result, the feeder 96 waits behind the second nail 78.

[0061] As shown in FIG. 12 , the plunger 93d of this embodiment has a tapered shape. The plunger 93d is a metal member including a tapered tip portion 93v, a central portion 93w connected to the tip portion 93v, and a rear end portion 93x connected to the central portion 93w and having a smaller diameter than the central portion 93w. That is, the plunger 93d has the tip portion 93v, the central portion 93w, and the rear end portion 93x. The tip portion 93v of the plunger 93d has a tapered shape, and the diameter P2 of the rear end portion 93x is smaller than the diameter P1 of the central portion 93w (P2<P1). In other words, the tip and rear end sides of the plunger 93d are narrower than the central portion 93w.

[0062] 14 and 15, when the plunger 93d is attracted by the solenoid 93, the tip portion 93v and the central portion 93w are housed within the solenoid 93. By making the tip and rear end sides thinner than the central portion 93w in this way, the weight of the plunger 93d can be reduced, and the speed at which the plunger 93d moves can be increased.

[0063] 16 and 17 is a preferred plunger 93d shape, and compared to the plunger 93d of Fig. 12, the length of the central portion 93w on the rear end portion 93x side is shortened, and a base portion 93y having a smaller diameter than the central portion 93w is provided at the boundary between the rear end portion 93x and the central portion 93w side. In this case, the diameter of the base portion 93y is the same as the diameter of the rear end portion 93x.

[0064] In the modified plunger structure, when the plunger 93d is attracted into the solenoid 93, as shown in FIG. 17, a root portion 93y of the rear end portion 93x of the plunger 93d enters the yoke 93b of the solenoid 93.

[0065] According to the driving tool 10 of this embodiment, a solenoid 93 is used in the supply unit 91 that feeds the nails 78. The yoke 93b provided inside the solenoid 93 is cylindrical, and a bobbin 93k around which a coil 93n is wound is housed within the yoke 93b. This prevents dust from adhering to the coil 93n, improving the dustproofness of the solenoid 93. In this regard, one end of the cylindrical yoke 93b is covered by a wall 93i, further improving the dustproofness of the solenoid 93.

[0066] As a result, the frequency of replacement and maintenance of the solenoid 93 can be reduced, improving the convenience of the driving tool 10.

[0067] A resin holder 93c is provided on the outer surface of the wall 93i of the yoke 93b, and a terminal 93f exposed to the outside is partially embedded in the holder 93c. The terminal 93f is soldered to the coil 93n at a portion exposed in an opening 93g of the holder 93c. The terminal 93f exposed to the outside of the holder 93c is detachably connected to a connector 95 provided at the end of the wiring 38 connected to the controller 82.

[0068] This facilitates connection between the wiring 38 and the terminal 93f of the solenoid 93, improving the ease of assembly of the driving tool 10. On the other hand, this facilitates detachment between the wiring 38 and the terminal 93f of the solenoid 93, improving the ease of maintenance when replacing the solenoid 93.

[0069] Furthermore, a protrusion 93q that serves as a wiring guide for exposing an end 93s of a coil 93n is provided on a flange 93p of the bobbin 93k of the solenoid 93. The provision of this protrusion 93q guides the coil 93n so that the coil 93n is pulled out straight from the yoke 93b along the side wall of the yoke 93b. This prevents the coil 93n from deforming and breaking when pulled out.

[0070] This increases the durability of the solenoid 93, thereby improving the convenience of the driving tool 10.

[0071] A cover member 93m is provided on the opening of the yoke 93b opposite the side where the terminal 93f is arranged to close the opening. The end of the yoke 93b that abuts against the outer periphery of the cover member 93m is crimped, so that the cover member 93m is sandwiched between the end of the yoke 93b and the yoke 93b so that no gap is formed between the cover member 93m and the yoke 93b. As a result, the dustproofness of the solenoid 93 can be improved.

[0072] Furthermore, the solenoid cover 93a is not connected to the housing 11 and is provided independently from the housing 11. Therefore, when attaching or detaching the solenoid cover 93a, the solenoid cover 93a can be attached or detached independently without disassembling the housing 11.

[0073] Furthermore, a connector 95 that can be attached and detached to the terminal 93f of the solenoid 93 is provided on the wiring 38 connecting the controller 82 and the terminal 93f of the solenoid 93, and this connector 95 and part of the wiring 38, together with the supply unit 91 including the solenoid 93, are covered by a solenoid cover 93a.

[0074] Therefore, when replacing the solenoid 93, the connector 95 can be easily removed from the terminal 93f of the solenoid 93, and the solenoid cover 93a can be attached and detached independently without disassembling the housing 11. As a result, the solenoid 93 can be easily replaced. Furthermore, the assembling and maintenance of the driving tool 10 can be improved.

[0075] Furthermore, when assembling the supply unit 91 to the magazine cover 90n, the solenoid 93 is attached so that the terminal 93f of the solenoid 93 is located closer to the tail cover 92 than the central axis A1. Specifically, the solenoid 93 is provided so that the terminal 93f is located on the tail cover 92 (magazine cover 90n) side within the solenoid cover 93a.

[0076] This allows the wiring 38 connected to the terminal 93f of the solenoid 93 to be routed to the controller 82 via the motor case 21 directly above, without passing through the canister 90a of the magazine unit 90. As a result, the wiring path can be shortened, the bending of the wiring 38 can be reduced, and the wiring can be made less likely to break.

[0077] Furthermore, since the terminal 93f of the solenoid 93 is located on the magazine cover 90n side, the solenoid cover 93a is prevented from pinching the wiring 38 when assembling the solenoid cover 93a, reducing the occurrence of wire breakage. Furthermore, the assembling of the driving tool 10 can be improved.

[0078] Furthermore, by tapering the tip 93v of the plunger 93d, the plunger 93d is less susceptible to the suction force that occurs during the initial movement of the plunger 93d when the plunger is attracted by the solenoid 93. Furthermore, by making the rear end 93x thinner than the center portion 93w, the suction force that the plunger 93d receives after the initial movement can be increased and then reduced again at the end. In other words, when the plunger is attracted by the solenoid 93, the suction force that the plunger 93d receives at the beginning and end can be reduced, thereby reducing the suction force that the plunger 93d receives outside the operational range of the driving tool 10. Furthermore, the suction force that the plunger receives within the operational range of the driving tool 10 can be increased, improving the suction characteristics of the solenoid 93.

[0079] Furthermore, by thinning the front end portion 93v and the rear end portion 93x, the weight of the plunger 93d can be reduced, and the moving speed of the plunger 93d can be increased.

[0080] The present invention is not limited to the above embodiment and can be modified in various ways without departing from the spirit and scope of the present invention. For example, an elastic member such as rubber may be provided at the bottom of the hole B1 in the yoke 93b in the above embodiment. In this case, when the plunger 93d is attracted into the solenoid 93, the tip end 93v of the plunger 93d can be brought into contact with the elastic member, thereby mitigating vibrations and shocks caused when the plunger is attracted.

[0081] 10... driving machine (work machine), 11... housing, 12... striking section, 13... injection section, 14... power supply section, 15... electric motor (motor), 16... reduction mechanism, 17... winding mechanism, 18... pressure accumulator vessel, 19... cylinder case, 20... handle, 21... motor case, 21a... extension section, 22... mounting section, 23... cap, 25... head cover, 26... pressure chamber, 27... cylinder, 28... piston, 29... driver blade, 31... bumper support section , 32...nose portion, 33...pinwheel storage portion, 35...bumper, 36...guide hole, 37...ejection path, 38...wiring, 50...pinwheel, 52...adjuster, 53...trigger, 76...storage case, 78...nail (fastener), 79...push lever, 80...solder, 81...adhesive, 82...controller (control portion), 85...trigger sensor, 90...magazine portion, 90a...canister (storage portion), 90b...passage portion, 90j...lid portion, 90k...shaft portion , 90m... roll nail storage section, 90n... magazine cover, 91... supply section, 92... tail cover (base section), 93... solenoid, 93a... solenoid cover (cover), 93b... yoke, 93c... holder, 93d... plunger, 93e... spring, 93f... terminal, 93g... opening, 93h... tapping screw, 93i... wall section, 93j... hole section, 93k... bobbin, 93m... lid member, 93n... coil, 93p... flange section, 93q... protrusion section ( wiring guide), 93r...axis, 93s...end, 93t...hole, 93u...boss, 93v...tip, 93w...center, 93x...rear end, 93y...root (part), 93z...hole, 94...dustproof mechanism, 95...connector, 96...feeder, 96a...feeder arm, A1...center axis, B1...hole, D1...assembly direction, D2...axial direction, M1...up-down direction, N1...front-rear direction, P1, P2...diameter, Q1...crimped portion, R1...left-right direction, S1...movement

Claims

1. A work machine having: an ejection section to which fasteners are supplied; an impact section that strikes the fasteners supplied to the ejection section; a magazine section that stores a plurality of the fasteners wound in a roll; a supply section that supplies the fasteners from the magazine section to the ejection section; a solenoid that drives the supply section to supply the fasteners; and a dustproof mechanism that prevents dust from entering the solenoid.

2. The work machine according to claim 1, wherein the solenoid has a terminal exposed to the outside, and the dustproof mechanism has a cylindrical yoke whose terminal arrangement side is closed.

3. A work machine as described in claim 2, wherein the yoke has a wall on the terminal arrangement side and houses a coil connected to the terminal inside, and the wall is provided with a hole through which an end of the coil is inserted.

4. A work machine according to claim 3, wherein the solenoid has a bobbin around which the coil is wound within the yoke, and the bobbin is provided with a wiring guide that passes through the hole.

5. A work machine as described in claim 3, wherein the solenoid has a holder attached to the outer surface of the wall portion on the terminal arrangement side, and the holder is a resin member molded integrally with the terminal.

6. The work machine according to claim 2, further comprising wiring connectable to said terminal, said wiring being provided with a connector that is fitted to said terminal.

7. A work machine as described in claim 2, wherein the yoke has a cover member that closes the opening on the side opposite to the terminal arrangement side, and the cover member is sandwiched in the axial direction of the yoke by the end of the yoke.

8. The work machine according to claim 5, wherein the holder has an opening through which the terminal is exposed, and the end of the coil is soldered to the terminal within the opening.

9. A work machine as described in claim 1, wherein the supply unit includes a feeder that feeds the fastener, and the dustproof mechanism has a plate-shaped base connected to the injection unit and a cover assembled to the base and accommodating the solenoid and the feeder between the base and the plate-shaped base.

10. A work machine as described in claim 9, wherein the cover is bowl-shaped, and in the assembly direction of the base and the cover, the central axis of the solenoid is located within the cover, and the terminal of the solenoid is located closer to the base than the central axis.

11. A work machine according to claim 9, further comprising a housing that houses the impact unit and a motor that drives the impact unit, and the cover is detachable from the base without disassembling the housing.

12. A work machine as described in claim 11, comprising: a control unit that controls the motor; wiring that connects the control unit to the terminal of the solenoid; and a connector that is interposed between the wiring and the terminal of the solenoid and that detachably connects the wiring to the terminal of the solenoid, wherein the connector is disposed within the cover.

13. A work machine as described in claim 12, wherein the magazine section has a cylindrical storage section that stores a plurality of the fasteners, and the cover, each of the storage section and the cover being connected to the housing, and the wiring is routed from inside the cover into the housing without passing through the storage section.

14. The work implement according to claim 1, wherein the solenoid has a plunger that is attracted into the solenoid, and the plunger has a tapered shape.

15. The work implement according to claim 14, wherein the plunger includes a tapered tip portion, a central portion connected to the tip portion, and a rear end portion connected to the central portion and having a smaller diameter than the central portion.

16. The work machine according to claim 15, wherein a portion of the rear end of the plunger enters a yoke provided in the solenoid when the plunger is attracted into the solenoid.

17. A work machine comprising: an ejection section to which fasteners are supplied; an impact section that strikes the fasteners supplied to the ejection section; a magazine section that stores a plurality of the fasteners wound in a roll; a supply section that supplies the fasteners from the magazine section to the ejection section; a solenoid that drives the supply section to supply the fasteners; a plate-shaped base section connected to the ejection section; a cover that is assembled to the base and stores the solenoid and the supply section between the base and the cover; a housing that stores the impact section and a motor that drives the impact section; a control section that controls the motor; and wiring that connects the control section to terminals of the solenoid, wherein the magazine section has a cylindrical storage section that stores a plurality of the fasteners and the cover, each of the storage section and the cover is connected to the housing, and the wiring is routed from the inside of the cover into the housing without passing through the storage section.

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