Work machine

Abstract

The invention provides a working machine which can easily release the biting of a fixing piece and improve the convenience. The striking part (70) is provided with a plunger (71) which receives the applied force of the driving spring (33) and a driving blade (72) which abuts against the nail during striking, the plunger (71) has a first clamping state and a second clamping state, the first clamping state is a state clamped with the driving blade (72), and the second clamping state is a state clamped with the driving blade (72). The second engagement state is a state of engaging with the drive blade (72) so as to be relatively movable with respect to the drive blade (72) by a certain distance (about 15.0 mm) greater than the first engagement state. When the broken nail piece is bitten, the plunger (71) and the driving blade (72) are separated to be in a second clamping state, the plunger (71) is made to move independently, and the driving blade (72) is struck through the plunger (71). By means of the action of the electric nail gun (10), the nail piece can be released from being bitten, and convenience is improved.

Description

Technical Field

[0001] The present invention relates to a working machine which strikes a fixing member by a striking part so as to eject the fixing member toward a target material. Background Art

[0002] An example of a machine for ejecting a fastener toward a target material is described in Patent Document 1. The nail driving machine described in Patent Document 1 includes: a striking part having a plunger moved by a spring force and a driver blade for striking the fastener; an electric motor for moving the striking part against the spring force; a housing for accommodating the striking part and the electric motor; and a magazine supported by the housing and loaded with a plurality of fasteners.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-019075 Summary of the invention

[0006] [Problems to be solved by the invention]

[0007] In addition, when the material to be nailed into the fixing is wood or the like, the fixing can be properly nailed into the material without applying a large load to the fixing. On the other hand, if the fixing is mistakenly ejected into a high-hardness material such as an iron plate, the fixing may be damaged. As a result, when the driving blade is pulled in, the damaged fixing may bite into the ejection portion, making it impossible to perform the subsequent driving blade movement.

[0008] At this time, in the technology described in Patent Document 1, it is necessary to disassemble the housing to take out the striking part housed in the housing, and use a hammer or the like to strike the driving blade forming the striking part in the ejection direction of the fixing part, thereby releasing the bite of the broken fixing part. It is difficult for the operator to perform such operation, and for example, the operator must entrust the repair to a sales store, etc., which may even lead to a loss of operation time.

[0009] An object of the present invention is to provide a working machine capable of easily releasing the biting of a fixing member and improving convenience.

[0010] [Technical means to solve the problem]

[0011] A working machine of one form of the present invention includes: a striking part that strikes a fixed part; a force-applying part that applies force to the striking part toward one side of a first direction; and a driving part that causes the striking part to overcome the force applied by the force-applying part and move toward the other side of the first direction, wherein the striking part comprises: a base that bears the force applied by the force-applying part; and a contact part that contacts the fixed part when striking, and the base comprises: a first engaging state in which it engages with the contact part, and a second engaging state in which it engages with the contact part in a manner in which it can move relative to the contact part by a certain distance greater than the first engaging state.

[0012] [Effects of the Invention]

[0013] According to the present invention, a working machine can be realized in which biting of a fixing member can be easily released, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a picture of the electric nail gun viewed from the right side.

[0015] Figure 2 yes Figure 1 A arrow diagram.

[0016] Figure 3 It is along Figure 2 Cross-sectional view of line BB.

[0017] Figure 4 It is a perspective view for explaining the striking mechanism.

[0018] Figure 5 yes Figure 3 An enlarged view of the dotted circle C.

[0019] Figure 6 This is a perspective view of the element unit as seen from the right side and the front side.

[0020] Figure 7 This is a perspective view of the element unit as seen from the left and rear sides.

[0021] Figure 8 It is a perspective view showing the left side housing half and the element unit.

[0022] Fig. 9 It is a perspective view showing the right side housing half and the element unit.

[0023] Fig.10 This is a perspective view of the striking part unit as viewed from the right and rear side.

[0024] Fig.11 This is a perspective view of the striking part alone as viewed from the right and front side.

[0025] Fig.12This is a diagram for explaining the normal operation of the striking part, as viewed from the upper side.

[0026] Fig.13 This is a diagram for explaining the bite release operation of the striking portion, as viewed from the upper side.

[0027] Fig.14 It is a perspective view for explaining the method of removing the cover member.

[0028] Fig.15 This is a perspective view for explaining the removal method of the fixing pin.

[0029] Fig.16 This is a diagram for explaining the operation of the striking portion after the bite is released, as viewed from the upper side.

[0030] Fig.17 It is a perspective view explaining the change process 1 of changing to another specification of the electric nail gun.

[0031] Fig.18 It is a perspective view for explaining the change process 2 of changing to another specification of the electric nail gun.

[0032] Fig.19 It is a perspective view explaining the change process 3 of changing to another specification of the electric nail gun.

[0033] Fig. 20 It is a perspective view for explaining the change process 4 of changing to another specification of the electric nail gun.

[0034] Fig.21 It is a perspective view explaining the change process 5 of changing to another specification of the electric nail gun.

[0035] Fig. 22 It is a perspective view for explaining a change process 6 for changing the electric nail gun to another specification.

[0036] [Explanation of Symbols]

[0037] 10: Electric nail gun (operating machine)

[0038] 11: Nail (fixing piece)

[0039] 20: Shell

[0040] 21: Left side housing half (first housing half)

[0041] 21a: Left side component unit mounting part

[0042] 22: Right side housing half (second housing half)

[0043] 22a: Right side component unit mounting part

[0044] 23: Striking mechanism housing (installation)

[0045] 24: Driving mechanism housing

[0046] 24a, 24b: Support wall (covering part)

[0047] 25: Substrate storage unit

[0048] 26: Handle

[0049] 27: Opening

[0050] 30: striking mechanism

[0051] 31: Support shaft

[0052] 31a: Spring seat

[0053] 32: Support rail

[0054] 33: Driving spring (force applying part)

[0055] 34: Driving gear

[0056] 34a: Small cam roller

[0057] 34b: Large cam roller

[0058] 35: Shock absorber components

[0059] 36: Gear bracket

[0060] 40: Putter

[0061] 41: Rod body

[0062] 42: Switch operation unit

[0063] 43: Return spring

[0064] 50: Component unit

[0065] 51: Component shell

[0066] 51a: Bottom wall

[0067] 51b: Front side wall

[0068] 51c: Upper side wall

[0069] 51d: Rear side wall

[0070] 51e: Notch

[0071] 51f: Hall element fixing part

[0072] 52: Micro switch (component)

[0073] 52a: Action button

[0074] 52b: Rod member

[0075] 53: Hall element (element)

[0076] 53a: Sensor substrate

[0077] 54: LED lights (lighting department)

[0078] 55: Trigger switch

[0079] 56: Trigger

[0080] 60: Driving mechanism

[0081] 61: Motor (driving unit)

[0082] 62: Stator

[0083] 63: Rotor

[0084] 63a: Rotation axis

[0085] 64: Control board

[0086] 65: Planetary gear reducer

[0087] 67: Nail storage unit (box)

[0088] 67a: Shift lever

[0089] 70: Percussion

[0090] 71: Plunger (base)

[0091] 71a: Through hole

[0092] 71b: Plunger body

[0093] 71c: Guide arm

[0094] 71d: First engagement protrusion

[0095] 71e: Second engagement protrusion

[0096] 71f: Blade fixing part

[0097] 71g: Insert hole

[0098] 71h: Engagement protrusion (second engagement portion)

[0099] 72: driving blade (contact portion)

[0100] 72a: Wide body

[0101] 72b: Narrow width

[0102] 72c: first shoulder (second engaging portion)

[0103] 72d: Anti-slip part (stop part)

[0104] 72e: Second shoulder (second engagement portion)

[0105] 72f: Through hole

[0106] 73: Fixing pin (first engaging portion)

[0107] 73a: Pin body (insertion part)

[0108] 73b: Pin head

[0109] 80: Injection

[0110] 90: Injection assembly

[0111] BD, EF, ER, Lock, N, TD: Location

[0112] BP: Battery Pack

[0113] BT: Lock release button

[0114] C: dotted circle

[0115] CR: Gear rack

[0116] F: Spring force

[0117] FM: Fixed member

[0118] H: Concave

[0119] LD: Irradiation direction

[0120] M: Object material

[0121] M1~M17: Arrow

[0122] MG: Magnet

[0123] PG: Planetary gear

[0124] PN: Pinion

[0125] R1, R2: Direction

[0126] RD: Cover member

[0127] RG: Ring gear

[0128] S1: First fixing screw

[0129] S2: Second fixing screw

[0130] S3: Bolts and nuts

[0131] SF1: front side (contact surface)

[0132] SF2: rear side

[0133] SG: Sun gear

[0134] SP: Spike

[0135] TL: Tools DETAILED DESCRIPTION

[0136] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

[0137] Figure 1 This is a diagram showing an electric nail gun viewed from the right side. Figure 2 express Figure 1 A arrow diagram, Figure 3 Indicates along Figure 2 The cross-sectional diagram of line BB, Figure 4 A perspective view illustrating the striking mechanism is shown.

[0138] <Electric nail gun>

[0139] like Figures 1 to 4 As shown, the electric nail gun 10 is an electric tool that shoots a nail 11 formed in a substantially U shape toward a target material M. Specifically, the electric nail gun 10 is used when fixing a vinyl sheet or cloth, and further a thin plywood or the like (not shown) to the target material M. However, the target material M is not a material with high hardness such as an iron plate, but a relatively soft material such as wood.

[0140] The electric nail gun 10 corresponds to a working machine in the present invention, and the nail 11 corresponds to a fixing member in the present invention.

[0141] <Housing>

[0142] The electric nail gun 10 includes a housing 20 formed into a substantially annular shape by injection molding a resin material such as plastic. The housing 20 is formed by docking a left housing half 21 and a right housing half 22 that are divided into two in the left-right direction. Figure 3 and Figure 4 In order to facilitate observation of the internal structure of the shell 20, only the left shell half 21 is shown.

[0143] Here, the left side housing half body 21 corresponds to the first housing half body in the present invention, and the right side housing half body 22 corresponds to the second housing half body in the present invention. The left side housing half body 21 and the right side housing half body 22 are divided in a direction intersecting the front-back direction and the up-down direction (the axial direction of the rotating shaft 63a of the motor 61).

[0144] like Figure 1 and Figure 3As shown, the housing 20 includes a hollow striking mechanism housing portion 23, a hollow driving mechanism housing portion 24, a hollow substrate housing portion 25, and a hollow handle portion 26. Thus, the substantially annular housing 20 has a total of four hollow portions.

[0145] The striking mechanism housing portion 23 extends in the front-to-back direction facing the object material M, and the driving mechanism housing portion 24 extends in the up-down direction orthogonal to the front-to-back direction. In addition, the base plate housing portion 25 extends in the same front-to-back direction as the striking mechanism housing portion 23, and the handle portion 26 extends in the same up-down direction as the driving mechanism housing portion 24.

[0146] Furthermore, the striking mechanism accommodating portion 23, the driving mechanism accommodating portion 24, the substrate accommodating portion 25 and the handle portion 26 are connected to each other at their respective ends. Figure 1 and Figure 3 As shown, an opening 27 is formed which penetrates in the left-right direction and in which a worker's finger (not shown) is placed.

[0147] In addition, if Figure 1 and Figure 3 As shown in FIG. 1 , the direction in which the substrate housing portion 25, the drive mechanism housing portion 24 (handle portion 26), and the striking mechanism housing portion 23 are arranged is defined as the “up-down direction”. Furthermore, the extending direction of the striking mechanism housing portion 23, i.e., the ejection direction of the nail 11, is defined as the “front-back direction”. Furthermore, the butting direction of the left housing half 21 and the right housing half 22, i.e., the facing direction of the left housing half 21 and the right housing half 22, is defined as the “left-right direction”.

[0148] <Strike Mechanism>

[0149] like Figure 3 and Figure 4 As shown, the striking mechanism 30 is housed inside the striking mechanism housing 23. The striking mechanism 30 is driven by a motor 61 housed inside the drive mechanism housing 24 and moves toward the target material M (see Figure 1 ) Injection nail 11 (refer to Figure 1 ) function.

[0150] The striking mechanism 30 includes a support shaft 31 made of a round steel bar. The support shaft 31 is disposed substantially at the center of the striking mechanism housing 23, and both axial sides of the support shaft 31 are fixed to the striking mechanism housing 23. The support shaft 31 extends in the front-to-back direction and is used to strike the striking portion 70 (see FIG. 1 ) of the striking nail 11. Fig.10 and Fig.11 ) movement to guide.

[0151] The striking mechanism 30 includes a support rail 32 fixed to the striking mechanism housing 23. The support rail 32 is formed by pressing a steel plate or the like into a substantially rod-like shape and is parallel to the support shaft 31. Also, the support rail 32 guides the movement of the striking part 70 in the same manner as the support shaft 31.

[0152] A spring seat 31a formed in an annular shape is integrally provided on the axial rear side of the support shaft 31. A drive spring 33 having a relatively large spring constant is provided between the spring seat 31a and the striking part 70. The drive spring 33 applies force to the striking part 70 toward one side of the axial direction of the support shaft 31 (the front side in the front-rear direction).

[0153] The drive spring 33 corresponds to the biasing portion in the present invention, and one side in the axial direction of the support shaft 31 (the front side in the front-rear direction) corresponds to one side in the first direction in the present invention.

[0154] That is, the drive spring 33 accumulates elastic energy to forcefully eject the nail 11. Specifically, when the striking portion 70 moves toward the other side (rear side) of the axial direction of the support shaft 31 by the drive gear 34, the drive spring 33 is compressed to accumulate elastic energy.

[0155] Furthermore, a damper member 35 is provided on the axial front side of the support shaft 31. The damper member 35 forms a part of the striking mechanism 30 and is made of rubber with excellent flexibility. The damper member 35 is arranged on the axis of the support shaft 31 to absorb the impact of the striking part 70 that moves strongly toward the axial front side of the support shaft 31. Thus, the quietness of the electric nail gun 10 is improved, and the transmission of the impact to the operator is suppressed.

[0156] The striking mechanism 30 includes a driving gear 34 for driving the striking portion 70. The driving gear 34 is driven by a motor 61. Figure 4 As shown by the arrow M1, the striking part 70 moves toward the rear side against the spring force of the driving spring 33. In addition, the driving gear 34 and the pinion gear PN engaged with the driving gear 34 are supported by a high-strength gear holder 36 made of a steel plate.

[0157] Here, the motor 61 corresponds to the driving unit in the present invention, and the rear side (rear side in the front-rear direction) of the striking unit 70 moved by the driving of the motor 61 corresponds to the other side in the first direction in the present invention.

[0158] Furthermore, a small cam roller 34a and a large cam roller 34b protruding larger than the small cam roller 34a are integrally provided on the axial upper side of the driving gear 34. The small cam roller 34a and the large cam roller 34b both protrude toward the striking portion 70, and move in a manner of describing a circle around the axis of the driving gear 34 as a center in accordance with the rotation of the driving gear 34. Thus, the striking portion 70 engaged with the small cam roller 34a and the large cam roller 34b can move toward the axial rear side of the support shaft 31.

[0159] <Push lever>

[0160] Figure 5 It indicated Figure 3 An enlarged view of the dotted circle C.

[0161] like Figure 3 and Figure 5 As shown, the striking mechanism 30 includes a striking mechanism 30 which is formed by the object material M (refer to Figure 1 ) is pressed by a push rod 40. The push rod 40 is formed into a substantially rod shape by stamping a steel plate or the like, and includes a rod body 41 extending in the front-rear direction and a switch operating portion 42 extending downward from the rod body 41. That is, the push rod 40 is substantially L-shaped when the electric nail gun 10 is viewed from the left and right directions.

[0162] Here, the push rod 40 is arranged on the nail 11 side which is further forward than the damper member 35 in the axial direction of the support shaft 31, and is movable in the front-rear direction. In addition, the switch operating part 42 operates the micro switch 52 (refer to Figure 3 and Figure 5 ) performs on-off operation, and the micro switch 52 is arranged near the driving gear 34 and the shock absorber component 35.

[0163] A return spring 43 is provided on the rear side of the push rod 40 to press the push rod 40 forward. The return spring 43 is a coil spring with a relatively small spring constant, and generates a spring force to move the push rod 40 forward.

[0164] Specifically, if Figure 5 As shown, when the electric nail gun 10 is not in use, the front end portion (front side in the figure) of the rod body 41 is in a state of protruding a predetermined amount toward the front side of the electric nail gun 10 due to the spring force of the return spring 43. At this time, the switch operating part 42 does not perform the on operation on the micro switch 52, and the micro switch 52 is in an off state.

[0165] In contrast, when the electric nail gun 10 is used, the front end of the rod body 41 is formed by the object material M (see Figure 1 ) is pressed, such as Figure 5 As shown by the arrow M2, the rod body 41 moves toward the rear side. Along with this, the switch operating part 42 also moves toward the rear side, so that Figure 5 As shown by arrow M3, the micro switch 52 is turned on as the lever member 52b swings.

[0166] And, if Figure 3 As shown in the figure, a trigger switch 55 is provided inside the handle portion 26 and near the striking mechanism housing portion 23. The trigger switch 55 is linked to the operation of the trigger 56 operated by the operator's finger. When the micro switch 52 is turned on and the trigger 56 is pulled and the trigger switch 55 is also turned on, the motor 61 is driven.

[0167] That is, when the operator uses the electric nail gun 10, the electric nail gun 10 will not operate even if the trigger 56 is pulled unless the push rod 40 of the electric nail gun 10 is pressed against the target material M. In this way, the push rod 40 and the micro switch 52 operated by the push rod 40 function as a safety device.

[0168] <Component Unit>

[0169] Figure 6 1 shows a perspective view of the element unit monomer viewed from the right and front side. Figure 7 1 shows a perspective view of the element unit monomer viewed from the left and rear side. Figure 8 A perspective view showing the left side housing half and the component unit is shown. Fig. 9 A perspective view showing the right side housing half and the element unit is shown.

[0170] like Figures 5 to 7 As shown, the component unit 50 is a part that unitizes a plurality of electronic components. Specifically, the component unit 50 includes a component case 51 formed into a substantially box shape using a resin material such as plastic.

[0171] The element case 51 includes a bottom wall portion 51a, and a front side wall portion 51b, an upper side wall portion 51c, and a rear side wall portion 51d are integrally provided at the outer edge of the bottom wall portion 51a. In addition, the front side wall portion 51b, the upper side wall portion 51c, and the rear side wall portion 51d are vertically provided at right angles to the bottom wall portion 51a.

[0172] A micro switch 52 that is turned on and off by the push rod 40 is housed inside the front wall portion 51b, the upper wall portion 51c, and the rear wall portion 51d. That is, the element case 51 holds the micro switch 52. The micro switch 52 includes an operation button 52a that can be pressed by a lever member 52b swingably provided on the micro switch 52.

[0173] Here, the rear side of the lever member 52b is exposed from the notch 51e provided in the upper wall 51c to the outside of the element case 51. Then, the switch operation part 42 of the push rod 40 presses the rear side of the lever member 52b as the lever body 41 moves toward the rear side, causing the lever member 52b to swing.

[0174] Moreover, the front side wall portion 51b is integrally provided with a Hall element fixing portion 51f. The Hall element fixing portion 51f is a groove, and the sensor substrate 53a on which the Hall element 53 is mounted is fixed to the Hall element fixing portion 51f. That is, the element case 51 holds the Hall element 53. In addition, the detection surface of the Hall element 53 faces the front side, that is, the pressing mechanism side of the nail receiving portion 67, so that it can face the magnet MG provided on the front end side (upper side) of the pressing mechanism.

[0175] Furthermore, when a sufficient amount of nails 11 are contained (loaded) in the nail receiving portion 67, the Hall element 53 and the magnet MG are not facing each other in the front-to-back direction. When the remaining amount of nails 11 in the nail receiving portion 67 decreases, the Hall element 53 and the magnet MG are facing each other in the front-to-back direction. That is, the Hall element 53 is used to detect the remaining amount of nails 11. When the remaining amount of nails 11 decreases, the control board 64 (see Figure 3 ) stops the motor 61.

[0176] This prevents the electric nail gun 10 from running dry. Therefore, the electric nail gun 10 itself is prevented from being damaged by the large impact of the striking part 70 during a dry strike, or the large impact of the striking part 70 during a dry strike is prevented from being transmitted to the operator. In this way, the Hall element 53 and the magnet MG function as a dry strike prevention device.

[0177] In addition, the micro switch 52 and the Hall element 53 detect the state of the electric nail gun 10, which is equivalent to a plurality of elements in the present invention.

[0178] Furthermore, a light emitting diode (LED) lamp 54 is disposed on the opposite side (left side) of the bottom wall portion 51a to the side where the micro switch 52 is disposed. The irradiation direction LD of the LED lamp 54 is as follows: Figure 5 and Figure 6 As shown by the arrow, it becomes the front side of the electric nail gun 10. That is, the LED light 54 illuminates the shooting target of the nail 11.

[0179] In addition, the LED lamp 54 corresponds to the lighting unit in the present invention.

[0180] Thus, even if the work site is dark, the operator can clearly confirm the target material M into which the nail 11 is driven (see Figure 1 ). In addition, the LED light 54 is, for example, on the trigger switch 55 (refer to Figure 1) turns on.

[0181] Moreover, if Figure 8 As shown, the left side of the element unit 50, that is, the side of the element unit 50 where the LED lamp 54 is arranged (see Figure 7 ) is mounted on the left element unit mounting portion 21a provided on the left housing half 21. On the other hand, Fig. 9 As shown, the right side of the element unit 50, that is, the side of the element unit 50 where the micro switch 52 is arranged (refer to Figure 6 ) is mounted on the right element unit mounting portion 22a provided on the right housing half 22.

[0182] Furthermore, when the left case half body 21 and the right case half body 22 are butted against each other to form the case 20 , the element unit 50 is fixed so as to be sandwiched between the left case half body 21 and the right case half body 22 .

[0183] Specifically, first, the LED lamp 54 forming the element unit 50 is mounted to the left element unit mounting portion 21a of the left housing half 21. Next, the element case 51 accommodating the micro switch 52 and mounting the sensor substrate 53a having the Hall element 53 is mounted to the left element unit mounting portion 21a in a manner overlapping the LED lamp 54.

[0184] Then, the right side housing half body 22 is docked to the left side housing half body 21, thereby mounting the micro switch 52 side of the component unit 50 to the right side component unit mounting portion 22a of the right side housing half body 22. Thus, the component unit 50 is clamped between the left side housing half body 21 and the right side housing half body 22 in a manner that does not shake. That is, the left side housing half body 21 and the right side housing half body 22 clamp the LED lamp 54 and the component case 51 that form the component unit 50.

[0185] <Drive mechanism>

[0186] like Figure 3 and Figure 4 As shown, a driving mechanism 60 is housed inside the driving mechanism housing portion 24. The driving mechanism 60 includes a motor 61 for driving the striking mechanism 30, and the motor 61 is disposed in the center of the driving mechanism housing portion 24 in the longitudinal direction.

[0187] The motor 61 includes a stator 62 and a rotor 63. The stator 62 is fixed to the drive mechanism housing portion 24. On the other hand, the rotor 63 is rotatably provided radially inside the stator 62 with a small gap therebetween.

[0188] Here, the battery pack BP is detachably mounted on the lower side of the substrate receiving portion 25. The battery pack BP includes a battery cell that can be charged and discharged, and the battery pack BP can slide in the front-rear direction relative to the substrate receiving portion 25. Thus, as long as a plurality of battery packs BP are prepared, the electric nail gun 10 can be operated continuously.

[0189] When the battery pack BP is to be removed from the substrate housing portion 25, the lock release button BT (see Figure 1 ) to perform the pressing operation.

[0190] Furthermore, the drive mechanism 60 includes a planetary gear reducer 65. The planetary gear reducer 65 includes: a ring gear RG fixed to the drive mechanism housing portion 24; a sun gear SG rotating together with the rotation shaft 63a on the radial inner side of the ring gear RG; a plurality of planetary gears PG meshing with both the sun gear SG and the ring gear RG and rotating around the sun gear SG; and a gear carrier CR supporting the rotation shafts of the planetary gears PG. Furthermore, a pinion PN meshing with the drive gear 34 is integrally provided at the rotation center of the gear carrier CR.

[0191] Thus, the rotation of the rotating shaft 63 a rotating at a high speed in the direction R1 is output from the pinion gear PN to the drive gear 34 in a state of being decelerated and having a high torque, and the drive gear 34 rotates in the direction R2 .

[0192] like Figures 1 to 3 As shown in the figure, a pair of support walls 24a and 24b are integrally provided on the front side of the drive mechanism housing portion 24. One support wall 24a is integrally provided on the left housing half 21, and the other support wall 24b is integrally provided on the right housing half 22. Furthermore, these support walls 24a and 24b are provided in a manner extending along the long side direction (up and down direction) of the drive mechanism housing portion 24 and protruding toward the front side of the drive mechanism housing portion 24.

[0193] A nail receiving portion 67 for receiving a plurality of nails 11 is detachably mounted on the pair of support walls 24a and 24b. Specifically, the nail receiving portion 67 is movable in the up-down direction relative to the pair of support walls 24a and 24b. Thus, the nail receiving portion 67 is covered by the pair of support walls 24a and 24b in the left-right direction. Thus, the appearance of the electric nail gun 10 is improved. However, when the electric nail gun 10 is used, the nail receiving portion 67 is fixed relative to the pair of support walls 24a and 24b.

[0194] In addition, the pair of support walls 24a and 24b correspond to the covering portion in the present invention.

[0195] Here, the plurality of nails 11 loaded in the nail receiving portion 67 are integrated into a rod shape extending in the vertical direction. And, by one striking action of the striking portion 70, one of the plurality of nails 11 is separated and ejected from the ejection portion 80 toward the target material M (see Figure 1 ) is ejected.

[0196] In addition, a pressing mechanism (not shown) having a spring for pressing the nail 11 toward the ejection portion 80 is movably provided inside the nail receiving portion 67. Then, the nail 11 is loaded into the nail receiving portion 67 and the pressing mechanism is pushed into the nail receiving portion 67, whereby the nail 11 is pressed toward the ejection portion 80. Here, a stop lever 67a for locking the pressing mechanism relative to the nail receiving portion 67 is provided on the lower side of the pressing mechanism in the longitudinal direction.

[0197] In addition, the nail accommodation portion 67 and the pressing mechanism correspond to the magazine in the present invention.

[0198] <Detailed structure of the striking part and its surroundings>

[0199] Next, the detailed structure of the striking part 70 and its periphery will be described in detail using the drawings.

[0200] Fig.10 The figure shows a perspective view of the striking part unit viewed from the right and rear side. Fig.11 The figure shows a perspective view of the striking part unit viewed from the right and front side. Fig.12 A diagram showing the normal operation of the striking part, viewed from above, is shown. Fig.13 A diagram illustrating the bite release action of the striking portion, viewed from the upper side, is shown. Fig.14 A perspective view illustrating a method of disassembling the cover member is shown. Fig.15 A perspective view showing the method of removing the fixing pin is shown. Fig.16 A diagram illustrating the operation of the striking portion after the bite is released is shown as viewed from the upper side.

[0201] like Fig.10 and Fig.11 As shown, the striking part 70 forming the striking mechanism 30 includes a plunger 71, a driving blade 72 and a fixing pin 73. The plunger 71 is formed into a roughly box-shaped shape by stamping a thick steel plate, etc., and has a certain degree of mass. Figure 1 )Strike nail 11 forcefully.

[0202] In addition, the plunger 71 forming the striking portion 70 corresponds to the base portion in the present invention.

[0203] The plunger 71 has a plunger body 71b including an insertion hole 71a through which the support shaft 31 is inserted. The drive spring 33 (see Figure 4 ) is in contact with the rear side of the plunger body 71 b , and the plunger body 71 b receives the spring force (urging force) of the drive spring 33 .

[0204] Furthermore, guide arms 71c are provided on the left and right sides of the plunger body 71b so as to extend toward the rear side of the plunger body 71b. The pair of guide arms 71c and the support rail 32 (see FIG. 2 ) fixed to the striking mechanism housing 23 are connected to the guide rail 32 of the striking mechanism housing 23. Figure 4 ) are respectively engaged, and can slide freely in the front-rear direction relative to the support rail 32. In addition, Figure 4 In order to facilitate observation of the configuration relationship of the drive spring 33, only the left side of the support rail 32 is shown.

[0205] Furthermore, a gear 71a is integrally provided on the lower side of the plunger body 71b to move toward the driving gear 34 (see Figure 4 ) The first engaging protrusion 71d and the second engaging protrusion 71e are protruded. In addition, the protruding height of the first engaging protrusion 71d is higher than the protruding height of the second engaging protrusion 71e. Moreover, the first engaging protrusion 71d is arranged on the rear side than the second engaging protrusion 71e.

[0206] The first engagement protrusion 71d and the second engagement protrusion 71e are respectively arranged near the drive gear 34 on the upper side of the drive gear 34. Figure 4 ) can be engaged with the first engagement protrusion 71d as the drive gear 34 rotates. In contrast, the large cam roller 34b (see Figure 4 ) can engage with the second engaging protrusion 71e as the driving gear 34 rotates.

[0207] Furthermore, a blade fixing portion 71f is integrally provided on the upper side of the plunger body 71b so as to protrude toward the rear side of the plunger body 71b. The rear side of the wide body portion 72a of the driving blade 72 is fixed to the blade fixing portion 71f by a fixing pin 73. In addition, an insertion hole 71g (see FIG. 7 ) is provided in the blade fixing portion 71f, which penetrates in the vertical direction and into which the pin body 73a of the fixing pin 73 is inserted. Figure 5 ).

[0208] Engagement protrusions 71h are integrally provided on the rear side and the left and right sides of the blade fixing portion 71f. These engagement protrusions 71h protrude upward from the blade fixing portion 71f at a predetermined height, and the protruding height exceeds the thickness dimension of the driving blade 72 and becomes substantially the same height as the height position of the pin head 73b of the fixing pin 73. In addition, in the left-right direction of the striking portion 70, between the pair of engagement protrusions 71h, a narrow width portion 72b disposed on the rear side of the wide width main body portion 72a of the driving blade 72 is disposed.

[0209] The pair of engagement projections 71h are provided with a front side surface SF1 facing forward and a rear side surface SF2 facing rearward in the front-rear direction of the striking part 70. By removing the fixing pin 73, the plunger 71 and the driving blade 72 can be moved separately in the front-rear direction.

[0210] Here, if Figure 4 As shown, there is no need to disassemble the housing 20 (refer to Figure 1 ), that is, there is no need to separate the left shell half 21 and the right shell half 22 (refer to Figure 2 ), the striking portion 70 including the plunger 71, the driving blade 72 and the fixing pin 73 can be exposed to the outside.

[0211] Specifically, the upper side of the striking mechanism housing portion 23 is provided with a cover member RD (see Figure 1 The cover member RD is sealed by a pair of first fixing screws S1 (see Fig.14 ) and fixed to the striking mechanism accommodating portion 23 forming the housing 20. That is, by removing the pair of first fixing screws S1, the cover member RD is removed from the striking mechanism accommodating portion 23. Thus, it is not necessary to disassemble the housing 20 (see Figure 1 ) can access the fixing pin 73, thereby removing the fixing pin 73.

[0212] When the fixing pin 73 is removed and the plunger 71 and the driving blade 72 are set to a state where they can move relative to each other, the front side surfaces SF1 of the pair of engaging protrusions 71h can respectively engage with the pair of first shoulders 72c ( Fig.11 In contrast, the rear side surfaces SF2 of the pair of engaging protrusions 71h can contact the pair of second shoulders 72e provided on the driving blade 72, respectively.

[0213] In addition, the front side surface SF1 provided on the engaging protrusion 71h faces the front side in the front-rear direction and can contact the first shoulder portion 72c, and corresponds to the contact surface in the present invention.

[0214] The driving blade 72 is a member that contacts the nail 11 and strikes the nail 11 when the striking portion 70 strikes, and is formed of a high-hardness steel plate. In addition, the driving blade 72 is equal to or less than the wall thickness of the nail 11 in order to avoid striking two nails 11, and is thinner than the wall thickness of the plunger 71.

[0215] In addition, the driving blade 72 corresponds to the abutment portion in the present invention.

[0216] Here, the driving blade 72 includes a wide main body 72a disposed at the front side and a narrow part 72b disposed at the rear side, and the length dimension of the wide main body 72a in the front-to-back direction is approximately four times the length dimension of the narrow part 72b in the front-to-back direction. On the other hand, the width dimension of the wide main body 72a in the left-right direction is approximately twice the width dimension of the narrow part 72b in the left-to-right direction.

[0217] Moreover, the driving blade 72 includes a slip-off prevention portion 72d on the side opposite to the wide main body portion 72a of the narrow portion 72b, and the length dimension of the slip-off prevention portion 72d in the front-to-back direction is approximately one-fifth of the length dimension of the narrow portion 72b in the front-to-back direction. In contrast, the width dimension of the slip-off prevention portion 72d in the left-right direction is approximately the same as the width dimension of the wide main body portion 72a in the left-to-right direction.

[0218] Furthermore, a pair of first shoulders 72c are provided at the boundary between the wide body portion 72a and the narrow portion 72b of the driving blade 72, facing the rear side in the long side direction of the driving blade 72. Furthermore, a pair of second shoulders 72e are provided at the boundary between the narrow portion 72b and the anti-slip portion 72d of the driving blade 72, facing the front side in the long side direction of the driving blade 72.

[0219] The wide main body 72a of the driving blade 72 is slidably held by a metal ejection portion 80. Also, in the ejection portion 80, the upper side of the striking mechanism housing portion 23 is closed in the same manner as the cover member RD. The ejection portion 80 is fixed by a pair of second fixing screws S2 (see FIG. 1 ) disposed on the left and right sides. Fig.19 ) and a set of bolts and nuts S3 extending in the left-right direction (refer to Fig.19 ) and fixed to the striking mechanism housing portion 23 of the shell 20.

[0220] In addition, the striking mechanism housing portion 23 of the housing 20 corresponds to a mounting portion to which the ejection portion 80 in the present invention is mounted.

[0221] That is, by removing the pair of second fixing screws S2 and the set of bolts and nuts S3, it is not necessary to disassemble the housing 20 (see Figure 1 ) can separate the ejection portion 80 and the driving blade 72 held in the ejection portion 80 from the striking mechanism housing portion 23.

[0222] In addition, the nails 11 received in the nail receiving portion 67 are supplied to the ejection portion 80 (see Figure 5 Thus, the driving blade 72 (wide body 72a) slidably held in the ejection unit 80 drives the nails 11 one by one, and even from the front end (front side) of the ejection unit 80 toward the target material M (refer to Figure 1 ) ejects the nails 11 one by one.

[0223] <Operation Instructions of Electric Nail Gun>

[0224] Next, the operation of the electric nail gun 10 formed in the above manner will be described in detail using the accompanying drawings. Fig.12 , Fig.13 and Fig.16 In order to facilitate understanding of the operation of the striking part 70 located inside the striking mechanism accommodating part 23 , a state in which the cover member RD is removed is shown.

[0225] <Normal operation>

[0226] like Fig.12 As shown, when the electric nail gun 10 is operating normally, the plunger 71 of the striking portion 70 is engaged with the driving blade 72 via the fixing pin 73, so as to move integrally with the driving blade 72. The engaged state of the plunger 71 and the driving blade 72 during normal operation (including an engaged state with a little shaking) is equivalent to the first engaged state in the present invention.

[0227] The fixing pin 73 that enables the plunger 71 and the drive blade 72 to be integrally movably engaged corresponds to the first engaging portion of the present invention. Thus, the plunger 71 and the drive blade 72 are engaged by the fixing pin 73 in an engaged state in which the plunger 71 and the drive blade 72 are integrally moved.

[0228] Furthermore, the striking portion 70 in the first engagement state can be driven by the motor 61 (see Figure 3 ) and the spring force (urging force) of the driving spring 33 and moves between the [bottom dead center], [standby position] and [top dead center].

[0229] in addition, Fig.12 In the embodiment, when the striking part 70 is located at the [bottom dead center] with reference to the position of the engaging protrusion 71h in the plunger 71 with respect to the front-rear direction, the engaging protrusion 71h is located at the position BD. Furthermore, when the striking part 70 is located at the [top dead center], the engaging protrusion 71h is located at the position TD which is retreated about 28.0 mm to the rear side than the position BD. That is, the movable range of the plunger 71 (the distance between the top dead center and the bottom dead center) is about 28.0 mm.

[0230] Furthermore, when the striking part 70 is located at the [standby position], the engaging protrusion 71h is located at the position N closer to the position TD than the intermediate position between the position BD and the position TD. Here, the so-called [standby position] refers to the position where the striking part 70 stands by when the electric nail gun 10 stops. By operating the electric nail gun 10 from the [standby position], the striking part 70 quickly moves from the position N to the position TD, and then quickly reaches the position BD to strike the nail 11. That is, by placing the striking part 70 at the [standby position] when the electric nail gun 10 stops, the nail 11 can be quickly ejected from the ejection part 80, thereby improving the workability.

[0231] <What to do if nails get clogged>

[0232] For example, when the electric nail gun 10 is mistakenly operated on a material with high hardness such as an iron plate, the nail 11 (refer to Figure 1 ) will be broken and remain inside the ejection unit 80. Then, the striking unit 70 is to be driven by the motor 61 (refer to Figure 3 ) driving force and return Fig.12 At this time, Fig.13 As shown by the dotted circle in [Nail Jam], the broken nail piece SP is bitten between the driving blade 72 and the ejection part 80 as the striking part 70 is pulled in toward the rear side.

[0233] At this time, the striking part 70 is trying to move from the position BD as the [bottom dead center] to the position TD as the [top dead center] by the driving force of the motor 61, but at the position Lock halfway (approximately in the middle) between the two, the bite of the nail piece SP becomes stronger and the motor 61 stops. As a result, the electric nail gun 10 becomes inoperable.

[0234] Therefore, the operator can easily release the bite of the nail piece SP by following the process described below. Specifically, the plunger 71 is set to a state where it can move relatively to the driving blade 72 that is locked due to the bite of the nail piece SP, and in this state, the plunger 71 is moved toward the rear side and then moved toward the front side, thereby hitting the driving blade 72 toward the front side with the plunger 71. In this way, the bite of the nail piece SP is released.

[0235] First, if Fig.14 As shown, a tool such as a screwdriver (not shown) is used to remove the pair of first fixing screws S1. Next, as shown by arrow M4, the cover member RD is removed from the striking mechanism accommodating portion 23 of the housing 20. Thus, the striking portion 70 accommodated in the striking mechanism accommodating portion 23 is exposed to the outside.

[0236] Then, if Fig.15As shown by the arrow M5, the fixing pin 73 is removed. At this time, a tool such as a screwdriver with a straight front end (not shown) is used to remove the fixing pin 73. In addition, the fixing pin 73 is only inserted into the through hole 72f of the driving blade 72 (see Figure 5 ) and the insertion hole 71g of the plunger 71 (see Figure 5 ) both, and can be easily disassembled.

[0237] As a result, the plunger 71 and the driving blade 72 are separated from each other and become relatively movable. Fig.13 As shown in [Only the plunger is at the top dead center] and [Strike with the plunger], the engaging protrusion 71h of the plunger 71 can move the portion corresponding to the narrow width portion 72b of the driving blade 72 in the front-rear direction by a certain distance. That is, the engaging protrusion 71h can move the distance of about 15.0 mm between the first shoulder 72c and the second shoulder 72e.

[0238] By removing the fixing pin 73 in this way, the plunger 71 of the striking part 70 can move a certain distance (about 15.0 mm) relative to the driving blade 72. Therefore, the engaging projection 71h of the plunger 71 can engage with both the first shoulder 72c and the second shoulder 72e of the driving blade 72.

[0239] In this way, the plunger 71 and the driving blade 72 can move relative to each other a certain distance (about 15.0 mm) that is greater than the state in which they are engaged with each other through the fixing pin 73 to become a whole and move (including the first engaging state with a little shaking), and the engaging protrusion 71h can be engaged with the first shoulder 72c and the second shoulder 72e. The engaging state of the two is equivalent to the second engaging state in the present invention.

[0240] Moreover, the engaging convex portion 71h, the first shoulder portion 72c and the second shoulder portion 72e that enable the plunger 71 and the driving blade 72 to engage relative to each other by a certain distance (about 15.0 mm) are equivalent to the second engaging portion in the present invention. In this way, in the engaging state where the plunger 71 and the driving blade 72 are relatively moved by a certain distance (about 15.0 mm), the plunger 71 and the driving blade 72 are engaged not by the fixing pin 73, but by the engaging convex portion 71h, the first shoulder portion 72c and the second shoulder portion 72e.

[0241] After the plunger 71 and the driving blade 72 are set to be relatively movable, the cover member RD is mounted on the striking mechanism accommodating portion 23 and fixed by a pair of first fixing screws S1. Next, the electric nail gun 10 is pressed against a piece of wood or the like (not shown) to operate the push rod 40 and pull the trigger 56 (see Figure 3 ) and the motor 61 is driven. That is, the electric nail gun 10 is operated as in normal times.

[0242] So, if Fig.13 As shown by the arrow M6, only the plunger 71 moves toward the rear side, and the engaging protrusion 71h of the plunger 71 leaves the first shoulder 72c (position EF) of the drive blade 72 and approaches the position TD as the [top dead center]. At this time, the drive blade 72 stops at the position Lock approximately in the middle between the position BD and the position TD, so the position ER of the second shoulder 72e of the drive blade 72 is located further to the rear than the position TD as the [top dead center]. Therefore, the rear side surface SF2 (refer to Fig.10 ) does not contact the second shoulder 72e and will not hinder the driving of the motor 61.

[0243] Then, if Fig.13 As shown by the arrow M7, the plunger 71 is strongly moved forward by the spring force (applying force) of the drive spring 33 and strikes the drive blade 72 toward the front. At this time, the first shoulder 72c of the drive blade 72 is located at a position EF further to the rear than the position BD as the [bottom dead center], so the front side surface SF1 (refer to Fig.11 ) strongly collides with the first shoulder 72c. Therefore, the spring force F of the drive spring 33 (see the hollow arrow in the figure) is reliably transmitted to the drive blade 72.

[0244] Thus, when the plunger 71 moves forward relative to the drive blade 72 in the front-rear direction, the engaging projection 71 h and the first shoulder 72 c apply the moving force of the plunger 71 (the spring force of the drive spring 33 ) to the drive blade 72 .

[0245] That is, when the plunger 71 moves forward relative to the drive blade 72 in the front-rear direction with the engagement projection 71 h being engageable with both the first shoulder 72 c and the second shoulder 72 e , the movement force of the plunger 71 is applied to the drive blade 72 .

[0246] Next, if Fig.16 As shown by the arrow M8 in [Nail Removal], the nail piece SP is removed by the movement of the driving blade 72 toward the front side. At this time, the plunger 71 stops at the position BD as the [lower dead center], and the driving blade 72 moves toward the front side with force, but the second shoulder 72e of the driving blade 72 presses (snaps to) the rear side surface SF2 of the engaging protrusion 71h (refer to Fig.10 ). Therefore, the position ER of the second shoulder portion 72e reaches the position BD as the [bottom dead center], and as indicated by the dotted arrow ×, the driving blade 72 is prevented from further moving forward.

[0247] In this way, the engaging protrusion 71h and the second shoulder 72e prevent the following situation, namely, starting from the state where the plunger 71 moves relative to the driving blade 72 in the front-to-rear direction and the plunger 71 is engaged with the driving blade 72, the driving blade 72 moves relative to the plunger 71 in the front-to-rear direction for more than a certain distance (about 15.0 mm).

[0248] Here, the driving blade 72 has an anti-slip portion 72d, which prevents the following situation, namely, when the engaging protrusion 71h can be engaged with the first shoulder 72c and the second shoulder 72e, starting from the state where the plunger 71 moves toward the front side in the front-to-back direction relative to the driving blade 72 and the plunger 71 is engaged with the driving blade 72, the driving blade 72 moves relative to the plunger 71 toward the front side in the front-to-back direction by more than a certain distance (about 15.0 mm).

[0249] In addition, the anti-detachment portion 72d corresponds to the stopper portion in the present invention.

[0250] Thus, the driving blade 72 is prevented from flying out from the ejection portion 80 to the front. That is, the anti-escape portion 72d has a function of preventing the driving blade 72 from flying out from the ejection portion 80 when the jam of the nail piece SP is released.

[0251] In addition, the blockage of the nail piece SP can be released without making the distance between the first shoulder 72c and the second shoulder 72e of the driving blade 72 (about 15.0 mm) larger than the movable range of the plunger 71 (about 28.0 mm).

[0252] That is, the relative movement distance (about 15.0 mm) of the plunger 71 relative to the drive blade 72 is less than the distance (about 28.0 mm) between the [top dead center] of the plunger 71 moved by the motor 61 and the [bottom dead center] of the plunger 71 moved by the drive spring 33 .

[0253] And, after removing the nail piece SP, as Fig.16 As shown by the arrow M9 [toward the plunger standby position], the plunger 71 is driven by the motor 61 from the position BD as the [bottom dead center] to the position N as the [standby position]. At this time, the movable drive blade 72 moves toward the rear side of the engagement protrusion 71h along with the movement of the plunger 71 toward the rear side. Fig.10 ) is pulled into the interior of the injection portion 80 while pressing against the second shoulder 72e.

[0254] Then, if Fig.14 As shown, the pair of first fixing screws S1 are removed again and the cover member RD is removed from the striking mechanism accommodating portion 23 of the housing 20, so that the striking portion 70 is exposed to the outside. Next, the through hole 72f (see Figure 5 ) and the insertion hole 71g of the plunger 71 (see Figure 5 ) are aligned, and the fixing pin 73 is inserted into both the through hole 72f and the insertion hole 71g. As a result, the plunger 71 and the driving blade 72 become movable integrally with each other.

[0255] In this way, the fixing pin 73 is inserted into both the plunger 71 and the drive blade 72 from the up-down direction orthogonal to the front-rear direction, thereby engaging the plunger 71 and the drive blade 72. Here, the pin body 73a of the fixing pin 73 is equivalent to the insertion portion in the present invention. Moreover, the up-down direction is equivalent to the second direction in the present invention.

[0256] Finally, the cover member RD is mounted on the striking mechanism housing portion 23 and fixed by a pair of first fixing screws S1 . Thus, the electric nail gun 10 can be completely restored to a normal state.

[0257] <Changes in specifications of electric nail guns>

[0258] Figures 17 to 22 A perspective view is shown to explain the change process of changing the electric nail gun to another specification.

[0259] The electric nail gun 10 of this embodiment can handle two sizes of nails 11 (10 mm and 12 mm) by using the main body (shell 20) of the electric nail gun 10 as a common part. The following describes the case where the electric nail gun 10 is changed from 12 mm to 10 mm.

[0260] First, prepare the ejection unit assembly 90 (for 10 mm) including the ejection unit 80 and the driving blade 72. Also, prepare the nail receiving unit 67 (for 10 mm) including the pressing mechanism. Fig. 20 The injection unit assembly 90 for 12 mm is shown in FIG. 1 , but the injection unit assembly 90 for 10 mm is also of the same shape. Fig.21 and Fig. 22 Although the nail accommodation portion 67 for 12 mm is shown in FIG. 1 , the nail accommodation portion 67 for 10 mm has the same shape.

[0261] like Fig.17 As shown, a tool such as a screwdriver (not shown) is used to remove the pair of first fixing screws S1. Next, as shown by arrow M10, the cover member RD is removed from the striking mechanism accommodating portion 23 of the housing 20. Thus, the striking portion 70 accommodated in the striking mechanism accommodating portion 23 is exposed to the outside.

[0262] Next, if Fig.18As shown by the arrow M11, the fixing pin 73 is removed. At this time, a tool such as a screwdriver with a straight tip (not shown) is used to remove the fixing pin 73. Thus, the plunger 71 and the driving blade 72 are separated.

[0263] Moreover, if Fig.19 As shown by the arrow M12, use a tool such as a screwdriver (not shown) to remove the pair of second fixing screws S2. Fig.19 As shown by the arrow M13, a tool such as a screwdriver (not shown) is used to remove a set of bolts and nuts S3. Fig. 20 As shown by the arrow M14, the ejection unit assembly 90 (for 12 mm) can be separated from the striking mechanism accommodating portion 23 of the housing 20.

[0264] Furthermore, if Fig.21 As shown by the arrow M15, the fixing member FM is operated, and the fixing member FM is installed on the pair of supporting walls 24a and 24b of the driving mechanism receiving portion 24 and is used to fix the nail receiving portion 67 to the pair of supporting walls 24a and 24b. Specifically, as Fig. 22 As shown, a tool TL such as a screwdriver having a straight-shaped tip is used, and as shown by an arrow M16 in the figure, the tip of the tool TL is inserted into the recess H of the fixing member FM.

[0265] Furthermore, the fixing member FM is elastically deformed as shown by the arrow M15 in the figure. In addition, the fixing member FM is a stamped product including a thin steel plate and can be elastically deformed by an external force. As a result, the nail receiving portion 67 (for 12 mm) that is snapped onto the fixing member FM and fixed to the pair of support walls 24a, 24b can slide relative to the pair of support walls 24a, 24b.

[0266] Therefore, as shown by arrow M17 in the figure, there is no need to disassemble the housing 20 (see Figure 1 ) can separate the nail receiving portion 67 (for 12 mm) from the pair of support walls 24a and 24b. Fig. 22 In the figure, the illustration of the right side housing half 22 is omitted.

[0267] Furthermore, to install the 10 mm ejection unit assembly 90 and the nail receiving unit 67 to the striking mechanism receiving unit 23 and the pair of supporting walls 24 a and 24 b of the housing 20 , respectively, it is sufficient to follow the reverse process to the above process.

[0268] As described in detail above, according to the electric nail gun 10 of this embodiment, the striking part 70 has a plunger 71 that bears the applied force of the drive spring 33 and a driving blade 72 that abuts against the nail 11 when striking, and the plunger 71 has a first engaging state and a second engaging state, the first engaging state is a state of engaging with the driving blade 72, and the second engaging state is a state of engaging with the driving blade 72 in a manner that the driving blade 72 can be relatively moved a certain distance (about 15.0 mm) larger than the first engaging state.

[0269] Thus, when the damaged nail piece SP bites into the nail, the plunger 71 and the driving blade 72 are separated and set to the second engagement state, so that the plunger 71 can be moved alone, and the driving blade 72 can even be hit by the plunger 71. Therefore, the nail piece SP can be easily released by the action of the electric nail gun 10 itself, thereby improving the convenience of the electric nail gun 10.

[0270] Moreover, according to the electric nail gun 10 of this embodiment, the striking part 70 includes a fixing pin 73 and an engaging protrusion 71h, a first shoulder 72c, and a second shoulder 72e for engaging the plunger 71 with the driving blade 72. In a first engaging state, the plunger 71 and the driving blade 72 are engaged by the fixing pin 73. In a second engaging state, the plunger 71 and the driving blade 72 are engaged not by the fixing pin 73 but by the engaging protrusion 71h, the first shoulder 72c, and the second shoulder 72e.

[0271] Thus, the plunger 71 and the driving blade 72 can be moved integrally with each other by the fixing pin 73, and on the other hand, the engaging convex portion 71h and the first shoulder 72c and the second shoulder 72e can be engaged without relying on the fixing pin 73, so that the plunger 71 and the driving blade 72 can be moved relative to each other. That is, by installing or not installing the fixing pin 73, the plunger 71 and the driving blade 72 can be easily moved integrally or relatively.

[0272] Furthermore, according to the electric nail gun 10 of this embodiment, the engaging projection 71 h and the first shoulder 72 c apply the moving force of the plunger 71 to the driving blade 72 when the plunger 71 moves forward relative to the driving blade 72 in the front-rear direction.

[0273] That is, when the plunger 71 moves relatively toward the front side in the front-rear direction with respect to the driving blade 72 in the second engagement state, the moving force of the plunger 71 is applied to the driving blade 72 .

[0274] Thus, the biting of the nail piece SP can be easily released by the operation of the electric nail gun 10 itself, thereby improving the convenience of the electric nail gun 10 .

[0275] Moreover, according to the electric nail gun 10 of this embodiment, the engaging protrusion 71h and the first shoulder 72c and the second shoulder 72e prevent the following situation, namely, starting from the state where the plunger 71 moves relative to the driving blade 72 toward the front side in the front-to-back direction and the plunger 71 is engaged with the driving blade 72, the driving blade 72 moves relative to the plunger 71 toward the front side in the front-to-back direction for more than a certain distance.

[0276] Specifically, the driving blade 72 has an anti-slip portion 72d, which prevents the following situation, namely, in the second engaged state, starting from the state in which the plunger 71 moves relative to the driving blade 72 toward the front side in the front-to-rear direction and the plunger 71 is engaged with the driving blade 72, the driving blade 72 moves relative to the plunger 71 toward the front side in the front-to-rear direction by more than a certain distance.

[0277] This can prevent the driving blade 72 from jumping out to the front side from the ejection portion 80 after the biting of the nail piece SP is released.

[0278] Furthermore, according to the electric nail gun 10 of the present embodiment, the engagement projection 71 h includes the front side surface SF1 , and the front side surface SF1 can be brought into contact with the drive blade 72 toward the front side in the front-rear direction.

[0279] Thus, when the plunger 71 strikes the drive blade 72, the drive blade 72 can be struck by the surface (front side surface SF1). Therefore, large stress can be prevented from being locally concentrated on the engagement protrusion 71h, and the engagement protrusion 71h can be protected from impact damage.

[0280] Furthermore, according to the electric nail gun 10 of the present embodiment, the fixing pin 73 includes the pin body 73 a which is inserted into both the plunger 71 and the drive blade 72 from the up-down direction orthogonal to the front-rear direction to engage the plunger 71 and the drive blade 72 .

[0281] Thus, the plunger 71 and the drive blade 72 moving in the front-rear direction can be supported by the pin body 73a without shaking in the front-rear direction. In addition, when the cover member RD is removed from the striking mechanism accommodating portion 23, the fixing pin 73 can be easily removed, thereby making it easy to separate the plunger 71 and the drive blade 72.

[0282] Furthermore, according to the electric nail gun 10 of this embodiment, the relative movable distance (approximately 15.0 mm) of the plunger 71 relative to the driving blade 72 is less than the distance (approximately 28.0 mm) between the [top dead point] of the plunger 71 moved by the motor 61 and the [bottom dead point] of the plunger 71 moved by the driving spring 33.

[0283] Thereby, the clogging of the nail piece SP can be eliminated without increasing the size of the drive blade 72 .

[0284] Moreover, according to the electric nail gun 10 of this embodiment, the housing 20 includes: a striking mechanism accommodating portion 23, which movably holds the driving blade 72 that forms the striking portion 70, and is equipped with an ejection portion 80 for ejecting the nail 11; and a pair of support walls 24a, 24b, which cover the nail accommodating portion 67 for loading the nail 11, and the ejection portion 80 and the nail accommodating portion 67 can be separated from the striking mechanism accommodating portion 23 and the pair of support walls 24a, 24b respectively without disassembling the housing 20.

[0285] Thus, the main body portion (the portion of the housing 20 ) of the electric nail gun 10 can be used as a common component to handle two sizes of nails 11 (10 mm and 12 mm). Therefore, the convenience can be further improved.

[0286] Furthermore, according to the electric nail gun 10 of this embodiment, the shell 20 has a left shell half 21 and a right shell half 22 which are divided in a direction intersecting both the front-to-back direction and the axial direction of the rotation axis 63a. The left shell half 21 and the right shell half 22 clamp the element shell 51, and the element shell 51 retains the LED light 54 that illuminates the shooting target of the nail 11 and the micro switch 52 and the Hall element 53 that detect the state of the electric nail gun 10.

[0287] Thus, the LED lamp 54 and the element case 51 can be easily arranged inside the housing 20, and the assembly work of the electric nail gun 10 can be simplified (assembly efficiency is improved).

[0288] The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the gist of the present invention. For example, the working machine of the present invention is not limited to the electric nail gun 10 for shooting nails 11 as described above, and may include a driving tool for driving nails.

[0289] In addition, as long as the present invention can be achieved, the material, shape, size, number, installation location, etc. of each component in the above-mentioned embodiment are arbitrary and are not limited to the above-mentioned embodiment.

Claims

1. A working machine, characterized in that: include: A striking part, striking a fixing member; A force applying part, applying force to the striking part toward one side of the first direction; as well as a driving part, causing the striking part to overcome the applied force of the force applying part and move toward the other side of the first direction, Wherein, the striking part has: a base portion, receiving the force applied by the force applying portion; and an abutting portion, which abuts against the fixing member when striking, The base has: a first engagement state in which the abutment portion is engaged, and A second engagement state in which the abutment portion is engaged with the abutment portion so as to be relatively movable by a predetermined distance greater than that in the first engagement state.

2. The working machine according to claim 1, characterized in that: The striking portion includes a first engaging portion and a second engaging portion that engage the base portion with the abutting portion. In the first engagement state, the base portion is engaged with the contact portion by the first engagement portion. In the second engagement state, the base portion is engaged with the contact portion not by the first engagement portion but by the second engagement portion.

3. The working machine according to claim 2, characterized in that: The second engaging portion applies a moving force of the base portion to the contact portion when the base portion moves relative to the contact portion toward one side in the first direction.

4. The working machine according to claim 3, characterized in that: The second engaging portion prevents the contact portion from moving relative to the base toward one side in the first direction by more than a certain distance from the base being engaged with the contact portion when the base moves relative to the contact portion toward one side in the first direction.

5. The working machine according to claim 2, characterized in that: The second engaging portion includes: a contact surface provided on the base portion, The contact surface faces one side in the first direction and is capable of contacting the abutting portion.

6. The working machine according to claim 2, characterized in that: The first engaging portion comprises: an inserting portion, The insertion portion is inserted into both the base portion and the contact portion from a second direction perpendicular to the first direction, thereby engaging the base portion with the contact portion.

7. The working machine according to claim 1, characterized in that: When the base portion moves relative to the contact portion toward one side in the first direction in the second engagement state, a moving force of the base portion is applied to the contact portion.

8. The working machine according to claim 7, characterized in that: The abutting portion has a stopper portion, The stopper prevents the following situation, namely, in the second engaged state, from the state in which the base moves relative to the abutting portion toward one side of the first direction while the base is engaged with the abutting portion, and the abutting portion moves relative to the base toward one side of the first direction by more than a certain distance.

9. The working machine according to claim 1, characterized in that: The relative movable distance of the base portion with respect to the contact portion is equal to or less than a distance between an upper dead point of the base portion moved by the driving portion and a lower dead point of the base portion moved by the urging portion.

10. The working machine according to claim 1, characterized in that: A housing is provided. The housing accommodates: the base forming the striking portion, the force applying portion applying force to the base, and the driving portion for moving the base against the force applied by the force applying portion. The housing comprises: A mounting portion that movably holds the abutment portion that forms the striking portion and is mounted with an ejection portion that ejects the fixing member; and A covering portion covers the box for loading the fixing member, The emitting portion and the cassette can be separated from the mounting portion and the covering portion, respectively, without disassembling the housing.

11. The working machine according to claim 1, characterized in that: A housing is provided. The housing accommodates: the base forming the striking portion, the force applying portion applying force to the base, and the driving portion for moving the base against the force applied by the force applying portion. The housing includes a first housing half and a second housing half divided in a direction intersecting both the first direction and the axial direction of a rotating shaft provided in the driving unit. The first housing half and the second housing half sandwich an element case, and the element case holds an illumination unit that illuminates an emission target of the fixture and a plurality of elements that detect a state of the working machine.

12. A working machine, characterized in that: include: A striking part, striking a fixing member; A force applying part, applying force to the striking part toward one side of the first direction; as well as a driving part, causing the striking part to overcome the applied force of the force applying part and move toward the other side of the first direction, Wherein, the striking part has: A base portion, bearing the force applied by the force applying portion; an abutting portion, abutting against the fixing member when striking; as well as The first engaging portion and the second engaging portion engage the base portion with the abutting portion. When the base is engaged with the contact portion via the second engagement portion, the base can move relatively to a greater extent with respect to the contact portion than when the base is engaged with the contact portion via the first engagement portion.

13. The working machine according to claim 12, characterized in that: The first engaging portion comprises: an inserting portion, The insertion portion is inserted into both the base portion and the contact portion from a second direction perpendicular to the first direction, thereby engaging the base portion with the contact portion.

14. The working machine according to claim 12, characterized in that: The second engaging portion includes: a contact surface provided on the base portion, When the base portion moves relatively to the abutment portion along one side of the first direction in a state where the second engagement portion is engaged with the abutment portion, the contact surface comes into contact with the abutment portion.

15. The working machine according to claim 14, characterized in that: The second engaging portion includes: a stopper portion provided on the abutting portion, The stopping portion prevents the following situation, namely, when the base is engaged with the abutting portion through the second engaging portion, the abutting portion moves relative to the base toward one side of the first direction by more than a certain distance, starting from the state in which the base moves relative to the abutting portion toward one side of the first direction and the contact surface contacts the abutting portion.

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