Work machine

Abstract

To provide a work machine of improved convenience.SOLUTION: A nailing machine 10 includes: a striking part; an injection part 42; and a supply part 72. The injection part 42 injects a mail struck nail by the striking part downward along a virtual axial line C extending vertically. The supply part 72 is located at the back of the injection part 42. The injection part 42 has an end surface 52 located at an end below. The end surface 52 has a flat part 54, a retraction part 56, and a notch part 58. The flat part 54 is located on the front side of the virtual axial line C and extends to surround the virtual axial line C. The retraction part 56 is located at the back of the virtual axial line C, and is located above the flat part 54. The notch part 58 is located between the flat part 54 and the retraction part 56 in a back and force direction when seen from the horizontal direction, and is located away from a virtual line M1 connecting a rear end of the flat part 54 and a front end of the retraction part 56.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] The nail driver described in Patent Document 1 has a striking unit, an ejection unit, a push lever, and a controller. The striking unit is composed of a piston and a driver blade. The ejection unit is provided with an ejection path and a push lever. When the push lever is pressed against the target material and moves upward, a predetermined signal is output from the push lever to the controller. The nail struck by the striking unit passes through the ejection path and is driven into the target material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-157401 Summary of the Invention [Problem to be solved by the invention]

[0004] When a work machine such as the nail driver of Patent Document 1 is used to drive nails into a mating material, the dust that is kicked up can enter the ejection section. If the dust that has entered the ejection section is then discharged to the outside of the ejection section, some of the discharged dust may adhere to the mechanism of the work machine, making it difficult for the mechanism to operate.

[0005] An object of the present invention is to provide a work machine with improved convenience. [Means for solving the problem]

[0006] In one embodiment, the work machine includes a striking unit, an ejection unit, and an actuation mechanism. The striking unit strikes a fastener. The ejection unit ejects the fastener struck by the striking unit toward one side in the first direction along an imaginary axis extending in the first direction. The actuation mechanism is located on one side in a second direction perpendicular to the first direction relative to the ejection unit. The ejection unit has an end face located at an end on one side in the first direction. The end face has a flat portion, a receding portion, and a notch. The flat portion is located on the other side in the second direction relative to the imaginary axis and extends to surround the imaginary axis. The receding portion is located on one side in the second direction relative to the imaginary axis and on the other side in the first direction relative to the flat portion. When viewed from a third direction perpendicular to both the first direction and the second direction, the cutout portion is located between the flat portion and the recessed portion in the second direction, and is located away from an imaginary line connecting one end of the flat portion in the second direction and the other end of the recessed portion in the second direction. [Effects of the Invention]

[0007] According to the present invention, the convenience of the work machine can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a right side view showing the appearance of a nail driver according to a first embodiment. FIG. [Figure 2] FIG. 2 is a front view of the nail driver of FIG. 1 as seen from the front. [Figure 3] FIG. 2 is a bottom view of the nail gun of FIG. 1 as seen from below. [Figure 4] FIG. 2 is an enlarged bottom view of the ejection section of the nail gun of FIG. 1. [Figure 5] FIG. 2 is an enlarged right side view of the ejection section of the nail gun of FIG. 1. [Figure 6] 2 is a cross-sectional view showing a state of an ejection part when a push lever of the nail driver of FIG. 1 comes into contact with a mating material and moves. FIG. [Figure 7] 2 is a perspective view showing a state in which dust is discharged from a cutout portion of the nail driver of FIG. 1. FIG. [Figure 8]FIG. 10 is a right side view showing the ejection section of the nail driver of the second embodiment. [Figure 9] FIG. 9 is an enlarged bottom view of the ejection section of the nail driver of FIG. 8. [Figure 10] FIG. 10 is a perspective view of the ejection unit of the nail driver of FIG. 9 as seen obliquely from below. [Figure 11] FIG. 10 is an enlarged bottom view of the ejection section of the nail driver of the third embodiment. [Figure 12] 12 is a cross-sectional view showing the state of the ejection part when the push lever of the nail driver in FIG. 11 comes into contact with a mating material and moves. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, working machines according to first, second, and third embodiments and modifications of the present invention will be described in detail with reference to the drawings. Note that in all drawings referred to in describing each embodiment and modification, the same or substantially the same configurations and elements will be designated by the same reference numerals. Furthermore, as a general rule, configurations and elements that have already been described will not be described repeatedly.

[0010] [Configuration of the first embodiment] 1 shows a nail gun 10 as a work machine according to a first embodiment. In the nail gun 10, when a predetermined condition is satisfied, a nail N, which is an example of a fastener, is struck by the striking unit 24. As a result, the nail N is ejected from the ejection unit 42 and driven into a target material G. Details of the striking unit 24 and the ejection unit 42 will be described later.

[0011] The direction in which the ejection unit 42 ejects the nail N is defined as the vertical direction. The vertical direction is an example of the first direction. An imaginary line extending in the vertical direction is defined as an imaginary axis C. The imaginary axis C is the central axis of the ejection path 44A, which will be described later. The striking unit 24 strikes the nail N downward in the vertical direction. The downward side is an example of one side of the first direction.

[0012] The directions perpendicular to the up-down direction are the front-rear direction and the left-right direction. The front-rear direction and the left-right direction are perpendicular to each other. Note that the up-down direction, front-rear direction, and left-right direction are set merely for the convenience of explanation. The front-rear direction is an example of a second direction. The rear side of the front-rear direction is an example of one side of the second direction. The left-right direction is an example of a third direction.

[0013] When the nail gun 10 is viewed from the left-right direction, the direction in which a supply unit 72 (described later) moves is defined as direction K. When viewed from the left-right direction, direction K intersects with both the up-down direction and the front-rear direction. The direction K is indicated by arrow K. The side of direction K where the ejection unit 42 is located is defined as the front side.

[0014] Specifically, the nail gun 10 includes a housing 12, a magazine 22, a striking unit 24, a striking force generating unit 32, an ejection unit 42, a drive unit 62, a supply unit 72, and a control unit 80.

[0015] <Housing> As shown in Fig. 1, the nail gun 10 includes a housing 12. The housing 12 is made up of two housing members that are butted against each other in the left-right direction and fixed together with screws (not shown). As a result, the various components of the nail gun 10 are housed inside the housing 12.

[0016] The housing 12 has a cylinder accommodating portion 13 , a motor accommodating portion 14 , a handle 15 , and an attachment portion 16 .

[0017] The cylinder housing 13 is tubular and extends vertically. The motor housing 14 extends rearward from the bottom of the cylinder housing 13 in the front-to-rear direction. A striking unit 24 is provided inside the cylinder housing 13. The handle 15 extends diagonally upward from the center of the cylinder housing 13 rearward.

[0018] The handle 15 is the part of the housing 12 that the operator grasps. When viewed from the top-bottom direction, the handle 15 is located behind the ejection unit 42. The handle 15 is provided with a trigger 19 that switches a predetermined signal (on signal, off signal) for driving the nail N. When the operator operates the trigger 19, an on signal or off signal is sent from a trigger switch (not shown) to the control unit 80.

[0019] The mounting portion 16 is connected to the rear end of the handle 15 and the rear end of the motor housing portion 14. A battery pack 18 is detachably attached to the mounting portion 16. A control unit 80 is also housed inside the mounting portion 16.

[0020] <Magazine> The magazine 22 is detachably mounted on the housing 12, spanning the lower end of the motor accommodating section 14 and the lower end of the mounting section 16. The magazine 22 is located on the opposite side (rear side) from the ejection section 42 side (front side). The magazine 22 stores a plurality of nails N wound in a roll. The plurality of nails N stored in the magazine 22 are fed one by one into the ejection section 42 by the feeding operation of a feeder 74, which will be described later.

[0021] <Striking section> The striking section 24 is biased downward (towards the ejection section 42) in the vertical direction by the striking force generating section 32, thereby striking the nail N of the ejection section 42 towards the target material G. The striking section 24 has a piston 26 and a driver blade 28.

[0022] <<Piston>> The piston 26 is accommodated inside a cylinder 34 (described later) so as to be capable of reciprocating up and down. In other words, the piston 26 is provided in the cylinder 34 so as to be capable of reciprocating between top dead center and bottom dead center along the axial direction of the cylinder 34. The piston 26 is also biased downward by receiving a biasing force (pressure) from the impact force generating unit 32.

[0023] <<Driver blade>> The driver blade 28 is connected to the lower part of the piston 26. The driver blade 28 is, for example, a metal plate-shaped member. The driver blade 28 extends downward from the lower surface of the piston 26 in the vertical direction. The driver blade 28 is provided with a plurality of racks arranged at intervals in the vertical direction. Note that the illustration of the plurality of racks is omitted. The driver blade 28 is capable of reciprocating vertically together with the piston 26 inside the cylinder 34. The driver blade 28 strikes downward the heads of the nails N that are sequentially supplied to an injection path 44A (described later).

[0024] <Impact force generation unit> The impact force generating unit 32 biases the impact unit 24 downward in the vertical direction. The impact force generating unit 32 is made up of a cylinder 34 and a chamber 36. The cylinder 34 and the chamber 36 are provided inside the cylinder accommodating unit 13. A piston chamber 35 is formed inside the cylinder 34. A pressure accumulator chamber 37 is formed inside the chamber 36.

[0025] The piston chamber 35 and the pressure accumulator chamber 37 are filled with compressed air, which is an example of high-pressure gas. The striking force generator 32 urges the striking portion 24 downward by the pressure of the compressed air in the pressure accumulator chamber 37. In other words, the striking force generator 32 is an example of a urging portion that imparts a urging force to the striking portion 24 so as to strike the nail N.

[0026] <Injection part> The ejection section 42 is located below the cylinder accommodating section 13. The ejection section 42 extends downward in the vertical direction from the lower end of the cylinder 34. The ejection section 42 is formed in a cylindrical shape. The ejection section 42 has an ejection path 44A that extends in the vertical direction. The ejection section 42 ejects the nail N struck by the striking section 24 downward from the ejection path 44A. Specifically, the ejection section 42 includes a blade guide 44 and a push lever 46 that is movable in the vertical direction along the blade guide 44.

[0027] <<Blade guide>> The blade guide 44 is an example of a base that defines an ejection path 44A through which the nail N is ejected. The blade guide 44 guides the driver blade 28 in the up and down direction. The blade guide 44 is formed in a cylindrical shape with an imaginary axis C as its central axis. The ejection path 44A is provided inside the blade guide 44. The ejection path 44A is formed in a cylindrical shape. The imaginary axis C is also the central axis of the ejection path 44A. The imaginary axis C is also the central axis of the tip portion of the driver blade 28 that moves while being guided by the blade guide 44. An ejection port 44B is provided at the lower end of the ejection path 44A. The blade guide 44 has a lower surface 44C (FIG. 3). The lower surface 44C is located at the lower end of the blade guide 44.

[0028] The supply unit 72 supplies the nails N one by one from the magazine 22 to the ejection path 44A. Details of the supply unit 72 will be described later. In the ejection unit 42, the nail N receives the impact force from the striking unit 24, and the nail N is ejected toward the target material G. In other words, the ejection unit 42 ejects the nail N that has been struck by the striking unit 24 downward along the imaginary axis C.

[0029] <<Push lever>> The push lever 46 is an example of a movable part that is provided so as to be movable up and down relative to the blade guide 44. Specifically, the push lever 46 is located outside the blade guide 44. The push lever 46 is held by the blade guide 44 so as to be movable up and down. The push lever 46 is biased downward by a spring (not shown).

[0030] When the push lever 46 is pressed against the opposing material G, it moves upward against the biasing force of a spring (not shown). At this time, a predetermined detection signal is output from a sensor (not shown) to the control unit 80. Note that FIGS. 1 and 2 show a state in which the push lever 46 is pressed against the opposing material G, causing the push lever 46 to move upward relative to the blade guide 44.

[0031] 2, the push lever 46 has a cylindrical portion 47 that comes into contact with the mating member G, and a plate portion 48 that extends upward in the vertical direction from the front end of the cylindrical portion 47. The cylindrical portion 47 and the plate portion 48 are integrally formed.

[0032] As shown in Fig. 3, a front portion of the tubular portion 47 with respect to the imaginary axis C is formed in a rectangular tubular shape. A rear portion of the tubular portion 47 with respect to the imaginary axis C is formed in a semi-cylindrical shape. The plate portion 48 (Fig. 2) is guided by the outer peripheral surface of the blade guide 44 and is movable in the vertical direction.

[0033] The ejection section 42 has an end surface 52 located at the lower end in the up-down direction. As an example, the end surface 52 is provided on the push lever 46. In the nail driver 10 of the first embodiment, the lower surface 44C is formed in a flat shape along the front-rear and left-right directions. The lower surface 44C does not have a portion for increasing the amount of dust P emitted. Therefore, the lower surface 44C is not included in the end surface 52.

[0034] <End face of injection part> 4 shows the end face 52 of the emission section 42 as viewed from below. The end face 52 has a flat portion 54, a recessed portion 56, and a notched portion 58. In the following description, the circumferential direction centered on the imaginary axis C will be referred to as the "circumferential direction." The ranges of the flat portion 54, the recessed portion 56, and the notched portion 58 will be expressed using central angles. Specifically, when the end face 52 is viewed from below in the vertical direction, the ranges of the flat portion 54, the recessed portion 56, and the notched portion 58 will be expressed using the central angle (unit: degrees) of an imaginary circle R centered on a point on the imaginary axis C.

[0035] An imaginary line passing through the imaginary axis C and extending in the left-right direction is defined as boundary line A1. As an example, boundary line A1 represents the imaginary boundary between flat portion 54 and cutout portion 58. An imaginary line connecting imaginary axis C and the left end position of the inner circumferential surface of receding portion 56 is defined as boundary line A2. Boundary line A2 represents the imaginary boundary between left cutout portion 59 (described later) and receding portion 56. An imaginary line connecting imaginary axis C and the right end position of the inner circumferential surface of receding portion 56 is defined as boundary line A3. Boundary line A3 represents the imaginary boundary between right cutout portion 61 (described later) and receding portion 56.

[0036] <<Flat area>> The flat portion 54 is located in front of the imaginary axis C (on the other side in the second direction) and extends in a circumferential direction centered on the imaginary axis C. In other words, the flat portion 54 is located in front of the imaginary axis C and extends so as to surround the imaginary axis C. Note that "surrounding" includes not only a state in which the entire object is surrounded, but also a state in which a part of the object is surrounded from the outside.

[0037] The flat portion 54 is a planar portion of the end face 52 that is perpendicular to the up-down direction. The flat portion 54 is provided in a range where the central angle θ1 is 180 degrees or more. Specifically, the flat portion 54 is provided in a range where the central angle θ1 is 180 degrees. In this way, the flat portion 54 is provided on the front side of the end face 52 with respect to the imaginary axis C, and in the circumferential direction of the imaginary circle R, in a range where the central angle θ1 (= 180 degrees) is.

[0038] The width (maximum width) in the left-right direction of the flat portion 54 is defined as width W1. The width (maximum width) in the left-right direction of the injection port 44B of the injection portion 42 is defined as width W2. Width W1 is larger than width W2.

[0039] <<Retreat section>> The receding portion 56 is located rearward (on one side in the second direction) with respect to the imaginary axis C, and is located above the flat portion 54 (on the other side in the first direction) when viewed from the left and right. The receding portion 56 is formed in a flat shape. The receding portion 56 is inclined so that the rear end is located higher than the front end.

[0040] The receding portion 56 is a portion of the end surface 52 that is located between the boundary line A2 and the boundary line A3. The receding portion 56 is provided on the rear side of the imaginary axis C and within a range of the central angle θ2. Specifically, the central angle θ2 is greater than 0 degrees and equal to or less than 40 degrees. The receding portion 56 is an example of a suppression portion that suppresses the dust P from flowing rearward in the front-to-rear direction toward the supply portion 72.

[0041] As shown in FIG. 5, when viewing the emission section 42 from the left-right direction, a virtual line M1 connects a rear end position P1 where the rear end (one end) of the flat section 54 in the front-to-rear direction is located, and a front end position P2 where the front end (the other end) of the receding section 56 in the front-to-rear direction is located. The virtual line M1 may be considered to be a virtual plane extending in the left-to-right direction. When viewed from the left-to-right direction, the virtual line M1 extends along a diagonal direction that intersects with a virtual line M2 that extends the flat section 54 in the front-to-rear direction. The virtual line M2 may be considered to be a virtual plane extending in the left-to-right direction.

[0042] The angle formed by the imaginary lines M1 and M2 is defined as the inclination angle θA. As an example, the inclination angle θA is 8 degrees. Note that the inclination angle θA is preferably set to be equal to or greater than 1 degree and equal to or less than 15 degrees. When viewed from the left-right direction, the receding portion 56 is located above the imaginary line M2.

[0043] <<Notch>> When viewed from the left-right direction, the notch 58 is located between the flat portion 54 and the receding portion 56 in the front-rear direction, and is located above the imaginary line M1. The notch 58 is recessed (cut out) above the receding portion 56 in the up-down direction with respect to the imaginary line M1. When viewed from the left-right direction, the notch 58 has an arc-shaped curved surface. The deepest portion 58A of the notch 58 is the portion of the notch 58 that has the longest distance L1 from the imaginary line M1 when viewed from the left-right direction. The notch 58 is an example of a discharge portion that guides the dust P (FIG. 4) so that the dust P is discharged in a direction different from the front-rear direction.

[0044] When viewed from the left-right direction, an imaginary line that passes through rear end position P1, which is the boundary point between flat portion 54 and notch 58, and is tangent to the curved surface on the front side of notch 58, is defined as imaginary line M3. Furthermore, when viewed from the left-right direction, the obtuse angle formed by flat portion 54 (imaginary line M2) and imaginary line M3 is defined as inclination angle θB. As an example, inclination angle θB is 160 degrees. It is desirable to set inclination angle θB between 100 degrees and 175 degrees.

[0045] 4, the cutout portion 58 has, for example, a left cutout portion 59 and a right cutout portion 61. In other words, the cutout portions 58 are provided on both sides of the end surface 52 in the left-right direction.

[0046] The left cutout 59 is located on the left side of the imaginary axis C. The left cutout 59 is provided on the end face 52 such that the central angle θ3 is within the range of 30 degrees to 80 degrees. The right cutout 61 is located on the right side of the imaginary axis C. The left cutout 59 is provided on the end face 52 such that the central angle θ3 is within the range of 30 degrees to 80 degrees. The central angle of the cutout 58 means the central angle θ3 of the left cutout 59 or the central angle θ4 of the right cutout 61. In other words, the central angle of the cutout 58 is not the sum of the central angle θ3 and the central angle θ4.

[0047] The deepest part 58A of the cutout portion 58 is provided in one location each in the left cutout portion 59 and the right cutout portion 61. The deepest part 58A is provided within the range of 35 degrees or more and 55 degrees or less for each of the central angles θ3 and θ4. As an example, the deepest part 58A is provided at a position where the angle in the circumferential direction from the flat portion 54 (boundary line A1) is 45 degrees for each of the central angles θ3 and θ4.

[0048] <Push lever hole> The push lever 46 has a hole 49 into which the blade guide 44 is inserted. The hole 49 has a shape in which an arc portion 49A, a recessed portion 49B, a flat portion 49C, and a recessed portion 49D are arranged in the circumferential direction around the imaginary axis C.

[0049] The arc portion 49A is located on the left side of the imaginary axis C. The recessed portion 49B is recessed diagonally rearward (radially outward) from the imaginary axis C. In other words, in the right cutout portion 61, the radial thickness of a portion where the central angle θ4 with respect to the boundary line A1 is approximately 45 degrees is thinner than the thickness at other positions in the circumferential direction. In addition, the recessed portion 49B faces a portion of the blade guide 44 that corresponds to a corner in the radial direction.

[0050] Dust P present between the blade guide 44 and the push lever 46 is guided by the blade guide 44 and the push lever 46, and is therefore likely to collect in the recessed portion 49B. Here, the dust P that has collected in the recessed portion 49B is likely to be discharged to the outside through the right cutout portion 61, because the recessed portion 49B is a thin-walled portion.

[0051] The flat portion 49C is positioned along the direction K. The recessed portion 49D is recessed from the imaginary axis C diagonally forward to the right (radially outward).

[0052] <Drive unit> The drive unit 62 shown in Fig. 1 drives the striking unit 24. Specifically, the drive unit 62 moves the striking unit 24 to a standby position before striking. The drive unit 62 has a motor 64, a speed reduction mechanism 66, and a rotation unit 68. The operation of the drive unit 62 is controlled by a control unit 80, which will be described later. The drive unit 62 operates by receiving electric power, and can move the striking unit 24 upward against the biasing force of the striking force generation unit 32.

[0053] <<Motor>> The motor 64 is housed in the motor housing 14. The motor 64 has an output shaft 65 and a rotor (not shown). As an example, the motor 64 is a brushless motor that operates using power supplied from the battery pack 18. The output shaft 65 extends in the front-rear direction.

[0054] <<Deceleration mechanism section>> The speed reducing mechanism 66 includes a planetary gear (not shown). The output shaft 65 is connected to a pinwheel 69 (FIG. 2) via the speed reducing mechanism 66, which will be described later.

[0055] <<Rotating part>> As shown in FIG. 2, the rotating unit 68 includes a pinwheel 69 and a plurality of pinion pins (not shown). The pinion pin is engageable with the rack of the driver blade 28. The pinwheel 69 rotates by receiving a driving force (rotational force) from the motor 64 (FIG. 1). The pinwheel 69 rotates during a series of striking operations of the nail gun 10, and the pinion pin engages with the rack, moving (raising) the striking unit 24 to a standby position after striking. In other words, the rotating unit 68 is an example of a winding unit that receives the driving force of the motor 64 and winds up the striking unit 24 upward against the biasing force of the striking force generating unit 32 (FIG. 1).

[0056] <Supply section> 1 is located rearward of the ejection unit 42 in the front-to-rear direction. The ejection unit 42 is configured to eject nails N stored in the magazine 22. The ejection unit 42 is an example of an actuation mechanism and an example of a supply mechanism. Specifically, the ejection unit 72 includes a feeder 74, a solenoid 76, and a spring (not shown).

[0057] The feeder 74 is provided so as to be capable of reciprocating movement along the K direction. The feeder 74 is provided with a plurality of feeding claws spaced apart in the K direction, which are engageable with a plurality of nails N. The plurality of feeding claws are not shown. The solenoid 76 has a coil and an iron core, not shown. The iron core is capable of reciprocating movement along the K direction, and is connected to the feeder 74. A spring biases the iron core toward one side (rear side) in the K direction, thereby positioning the feeder 74 at its initial position.

[0058] When a magnetic attractive force is generated in the solenoid 76, the iron core moves to the other side (front side) in the direction K against the biasing force of the spring. This causes the feeder 74 to supply the nail N to the ejection unit 42. In this way, the feeder 74 supports the nail N so that it can move toward the ejection position in the ejection unit 42. The solenoid 76 drives the feeder 74.

[0059] <Control unit> 1 is a microcomputer including a processor and a memory (not shown). The control unit 80 controls the operation of each part of the nail driver 10. The control unit 80 activates the motor 64 when the piston 26 is to move from the bottom dead center to the top dead center after striking.

[0060] [Operation of the first embodiment] As shown in FIG. 6, when the nail driver 10 drives a nail N, the push lever 46 is pressed against the target material G. Specifically, the flat portion 54 of the push lever 46 comes into surface contact with the target material G. This stabilizes the posture of the nail driver 10. As the operator continues to press the nail driver 10, the blade guide 44 moves toward the target material G. In other words, the blade guide 44 moves relative to the push lever 46. This turns on a switch (not shown) of the push lever 46.

[0061] In the nail driver 10 shown in FIG. 1, when the push lever 46 is in the ON state and the trigger 19 is in the ON state, the control unit 80 activates the motor 64. The pinwheel 69 (FIG. 2) is driven to rotate, and a pinion pin (not shown) engages with a rack, pushing up the driver blade 28 and moving the piston 26 from the initial (standby) position to the top dead center. Thereafter, with the pinion pin (not shown) disengaged from the rack, the piston 26 receives the biasing force of the striking force generating unit 32 and moves downward. As a result, the driver blade 28 moves from the top dead center to the bottom dead center and strikes the nail N.

[0062] After the nail N is struck, the pinwheel 69 continues to rotate, and the pinion pin and the rack engage again. This causes the driver blade 28 to move from the bottom dead center to the initial position. In other words, the piston 26 reciprocates between the bottom dead center and the top dead center, and as a result, the driver blade 28 strikes the nail N, causing the nail N to be ejected from the ejection part 42.

[0063] As shown in Figure 6, when a nail N is driven into a mating material G, dust P is generated near the part of the mating material G where the nail N has been driven. At this time, the push lever 46 is in contact with the mating material G, but the blade guide 44 tries to move upward due to the reaction force from the driving operation. As a result, a gap may be created between the lower part of the blade guide 44 and the mating material G.

[0064] As shown in FIG. 7, dust P generated inside hole 49 forward of imaginary axis C is surrounded by flat portion 54 and mating member G (FIG. 6), and thus its movement is restricted, so it attempts to move rearward of imaginary axis C. Here, as shown by arrow B1, some of the dust P present rearward of imaginary axis C comes into contact with the edge (inner surface) of receding portion 56, and its movement rearward is restricted. For this reason, dust P is less likely to flow toward supply portion 72, which is located rearward of injection portion 42. In other words, contamination of supply portion 72 with dust P is suppressed.

[0065] In the injection section 42, a notch 58 is provided between the flat section 54 and the receding section 56. As a result, as shown by arrows B2 and B3, the dust P passes through the notch 58 (left notch 59 and right notch 61) and is discharged to the outside of the injection section 42 (push lever 46). As an example, the dust P is discharged in a direction at an angle of 45 degrees with respect to the front-to-rear direction. In this way, even if a gap occurs between the blade guide 44 that has received a recoil and the mating material G (FIG. 6), the dust P is discharged to the outside through the notch 58, and therefore, it is possible to prevent the dust P from entering the injection path 44A (FIG. 4).

[0066] <Summary> The operation of the nail gun 10 will be summarized with reference to Figures 1 to 7. Note that individual figure numbers will be omitted.

[0067] In the nail driver 10, a supply unit 72 is located behind the ejection unit 42. A workpiece G into which the nail N is driven faces the ejection unit 42 in the vertical direction.

[0068] The striking section 24 strikes the nail N, and the ejecting section 42 ejects the nail N downward along the imaginary axis C, thereby driving the nail N into the mating material G. At this time, dust P may be generated by the ejecting section 42 as the nail N is ejected (driven in). The generated dust P does not easily flow between the mating material G and the flat section 54, so it tries to flow rearward from between the mating material G and the receding section 56. Some of the dust P flowing rearward is inhibited from moving by contact with the edge of the receding section 56.

[0069] Furthermore, a notch 58 is located between the flat portion 54 and the receding portion 56 in the front-rear direction. The notch 58 is located away from the imaginary line M1 connecting the flat portion 54 and the receding portion 56. In other words, the size of the space between the target material G and the notch 58 is larger than the size of the space between the target material G and the receding portion 56. As a result, the airflow discharged from the injection path 44A is dominated by the flow rate through the notch 58, and the flow rate through the receding portion 56 is smaller than the flow rate through the notch 58. For this reason, when the dust P flows rearward, the dust P is discharged to the outside through the notch 58. This makes it possible to prevent the dust P from flowing rearward, where the supply portion 72 is located.

[0070] In this way, the nail driver 10 can prevent the dust P from flowing from the ejection part 42 toward the supply part 72, and can also facilitate the discharge of the dust P to the outside from the ejection part 42. This improves the convenience of the nail driver 10.

[0071] In the nail driver 10, the cutout 58 is recessed higher than the receding portion 56 relative to the imaginary line M1. This makes the space formed by the imaginary line M1 (imaginary surface) and the cutout 58 larger than the space formed by the imaginary line M1 and the receding portion 56, so that more dust P can be discharged from the cutout 58 to the outside.

[0072] In the nail gun 10, the notches 58 (left notch 59 and right notch 61) are provided on both the left and right sides, which makes it easier to discharge dust P from between the mating material G and the end face 52 to the outside compared to a configuration in which the notches 58 are provided on only one side in the left and right direction.

[0073] In the nail driver 10, the notches 58 are provided within the ranges of the central angles θ3 and θ4, both of which are equal to or greater than 30 degrees and equal to or less than 80 degrees. In other words, the notches 58 are opened in a diagonal direction intersecting the front-to-rear direction, making it difficult for the dust P to flow in the left-right or front-to-rear direction. In this way, in the nail driver 10, the dust P is discharged diagonally from the notches 58, which further prevents the dust P from flowing toward the supply unit 72, which is located rearward of the ejection unit 42.

[0074] In the nail driver 10, the portion of the cutout 58 that is the longest distance L1 from the imaginary line M1 is the portion with the largest opening for discharging the dust P. Here, the portion with the longest distance L1 from the imaginary line M1 is located within a range of a central angle of 35 degrees or more and 55 degrees or less. Therefore, the portion with the largest opening is located at a substantially equal distance from each of the flat portion 54 and the recessed portion 56. In other words, the deepest portion of the cutout 58 is located at a central angle of 45 degrees from the boundary line A1. This allows the dust P to be discharged to the outside from the cutout 58, avoiding locations that restrict the flow of the dust P, such as the flat portion 54 and the recessed portion 56.

[0075] In the nail driver 10, the flat portion 54 is provided in a range where the central angle θ1 is equal to or greater than 180 degrees. This increases the contact area between the flat portion 54 and the mating material G compared to a nail driver with a central angle smaller than 180 degrees, making it easier to stabilize the posture of the nail driver 10 when striking the nail N.

[0076] Furthermore, in the nail gun 10, the flat portion 54 is provided within a range in which the central angle θ1 is 180 degrees. As a result, the entire front side of the end face 52 with respect to the imaginary axis C (central axis) is the flat portion 54, making it easier to stabilize the posture of the nail gun 10. Also, since the receding portion 56 and the notched portion 58 are located on the rear side of the end face 52 with respect to the imaginary axis C, a space for discharging the dust P can be secured compared to a configuration in which the central angle θ1 is greater than 180 degrees.

[0077] In the nail gun 10, the width W1 in the left-right direction of the flat portion 54 is larger than the width W2 in the left-right direction of the injection port 44B. This allows the flat portion 54 to come into contact with the mating material G over a wide range in the left-right direction, stabilizing the posture of the nail gun 10 and making it easier for the nail gun 10 to slide in the front-rear or left-right direction.

[0078] In the nail gun 10, the handle 15 is located behind the ejection part 42 when viewed from the top-bottom direction. On the other hand, the flat part 54 is provided in front of the ejection part 42. As a result, even if an external force that tilts the upper part of the nail gun 10 forward acts on the ejection part 42 when the operator grasps the handle 15, the flat part 54 comes into contact with the mating material G and resists the external force, making it easier to maintain the posture of the nail gun 10 and also making it easier for the nail gun 10 to slide in the front-back or left-right direction.

[0079] In the nail driver 10, the end surface 52 is provided on the push lever 46. In other words, the end surface 52 is not provided on the blade guide 44. When the blade guide 44 receives a recoil and moves relative to the push lever 46, the dust P tends to move along with the relative movement of the blade guide 44. At this time, the push lever 46 and the mating material G are maintained in contact with each other.

[0080] Here, a notch 58 is provided in the end surface 52 of the push lever 46. Therefore, dust P present near the push lever 46 can be discharged to the outside of the push lever 46 through the notch 58. This makes it possible to prevent the dust P from entering the injection path 44A.

[0081] In the nail driver 10, the supply unit 72 is located behind the ejection unit 42. The workpiece G into which the nail N is to be driven faces the ejection unit 42 in the vertical direction. The striking unit 24 receives a biasing force from the impact force generating unit 32 to strike the nail N, and the ejection unit 42 ejects the nail N downward, thereby driving the nail N into the workpiece G. In the ejection unit 42, dust P may be generated as the nail N is ejected.

[0082] Here, the recessed portion 56 of the end surface 52 prevents the dust P from flowing rearward toward the supply unit 72. The cutout portion 58 guides the dust P so that the dust P is discharged in a direction different from the front-to-rear direction. In this way, the nail driver 10 can prevent the dust P from flowing from the ejection unit 42 toward the supply unit 72 and can make it easier to discharge the dust P from the ejection unit 42. This improves the convenience of the nail driver 10.

[0083] [Configuration of the second embodiment] A nail driver 90 as a work machine according to the second embodiment will be described. Note that components that are the same as or similar to those of the nail driver 10 (FIG. 1) of the first embodiment will be denoted by the same reference numerals and will not be described again.

[0084] 8 shows an ejection unit 92 of a nail gun 90. The configuration of the nail gun 90 is such that the ejection unit 42 (FIG. 1) of the nail gun 10 is replaced with the ejection unit 92. The configuration other than the ejection unit 92 is the same as the configuration of the nail gun 10.

[0085] <Injection part> The ejection unit 92 is located below the cylinder housing unit 13 (Fig. 1). The ejection unit 92 ejects the nail N struck by the striking unit 24 (Fig. 1) downward through the ejection path 44A (Fig. 1). Specifically, the ejection unit 92 includes a blade guide 44 and a push lever 94 that is movable up and down along the blade guide 44.

[0086] The push lever 94 is an example of a movable part that is provided so as to be movable up and down relative to the blade guide 44. The push lever 94 differs from the push lever 46 (FIG. 5) in that the end surface 52 (FIG. 5) is replaced with an end surface 96. The configuration other than the end surface 96 is the same as that of the push lever 46, so a description thereof will be omitted.

[0087] <End face of injection part> 9 shows the lower end of the injection portion 92 as viewed from below. The end face 96 has a flat portion 54, a recessed portion 56, an inclined portion 97, and a notched portion 102. Furthermore, in addition to boundary lines A1, A2, and A3, boundary lines A4 and A5 are also shown in FIG.

[0088] Boundary line A1 represents the imaginary boundary between flat portion 54 and inclined portion 97. Boundary line A2 represents the imaginary boundary between left cutout portion 103 (described later) and recessed portion 56. Boundary line A3 represents the imaginary boundary between right cutout portion 104 (described later) and recessed portion 56. Boundary line A4 represents the imaginary boundary between left inclined portion 98 (described later) and left cutout portion 103. Boundary line A5 represents the imaginary boundary between right inclined portion 99 (described later) and right cutout portion 104.

[0089] The ranges of the flat portion 54, the recessed portion 56, the inclined portion 97, and the cutout portion 102 are expressed using central angles. Specifically, when the end face 96 is viewed from below in the vertical direction, the ranges of the flat portion 54, the recessed portion 56, the inclined portion 97, and the cutout portion 102 are expressed using the central angle (unit: degrees) of an imaginary circle R centered at a point on the imaginary axis C.

[0090] <<Slope>> The inclined portion 97 is located rearward with respect to the imaginary axis C and above the flat portion 54. The inclined portion 97 is formed in a flat shape. The inclined portion 97 is inclined so that its rear end is located above its front end. As an example, the inclined portion 97 has a left inclined portion 98 and a right inclined portion 99. In other words, the inclined portions 97 are provided on both sides of the end face 96 in the left-right direction.

[0091] The left inclined portion 98 is located on the rear side and left side of the end face 96 with respect to the imaginary axis C. The left inclined portion 98 is provided such that the angle thereof with respect to the boundary line A1 in the circumferential direction of the imaginary circle R falls within a range of a central angle θ5. Specifically, the central angle θ5 is set within a range greater than 0 degrees and equal to or less than 40 degrees.

[0092] The right inclined portion 99 is located on the rear side and right side of the end face 96 with respect to the imaginary axis C. The right inclined portion 99 is provided such that the angle thereof with respect to the boundary line A1 in the circumferential direction of the imaginary circle R falls within a range of a central angle θ6. Specifically, the central angle θ6 is set within a range greater than 0 degrees and equal to or less than 40 degrees.

[0093] 8, the angle formed by the inclined portion 97 and the imaginary line M2 when viewed from the left and right is, for example, an inclination angle θA. In other words, the inclined portion 97 and the receding portion 56 are each located on the imaginary line M1 when viewed from the left and right.

[0094] <<Notch>> As shown in Fig. 9, the cutout 102 is located between the inclined portion 97 and the receding portion 56 in the circumferential direction of the imaginary circle R, and is located above the imaginary line M1 (Fig. 8). The cutout 102 is recessed (cut out) above the receding portion 56 in the up-down direction with respect to the imaginary line M1. The cutout 102 is also trapezoidal when viewed from the left-right direction. The cutout 102 is an example of a discharge portion that guides the dust P so that the dust P is discharged in a direction different from the front-rear direction.

[0095] For example, the cutout portion 102 has a left cutout portion 103 and a right cutout portion 104. In other words, the cutout portions 102 are provided on both sides of the end surface 96 in the left-right direction.

[0096] The left cutout 103 is located on the left side of the imaginary axis C. The left cutout 103 is provided on the end face 96 such that the central angle θ3 is within the range of 30 degrees to 80 degrees. The right cutout 104 is located on the right side of the imaginary axis C. The right cutout 104 is provided on the end face 96 such that the central angle θ4 is within the range of 30 degrees to 80 degrees. In this way, the central angle of the cutout 102 means the central angle θ3 of the left cutout 103 or the central angle θ4 of the right cutout 104. In the right cutout 104, in the circumferential direction of the imaginary circle R, in a portion where the central angle θ4 with respect to the boundary line A1 is around 45 degrees, the radial thickness is thinner than the thickness at other positions.

[0097] [Operation of the second embodiment] In the nail driver 90 shown in FIG. 10, when a nail N (FIG. 1) is driven into a mating workpiece G (FIG. 1), dust P is kicked up. The dust P generated in front of the imaginary axis C is restricted in movement by the flat portion 54 and the mating workpiece G, and therefore tends to flow rearward of the imaginary axis C. As shown by arrow B1, some of the dust P generated rearward of the imaginary axis C comes into contact with the edge (inner surface) of the receding portion 56, and is therefore restricted in its rearward movement. For this reason, the dust P is less likely to flow toward the supply portion 72, which is located rearward of the ejection portion 92.

[0098] Here, a notch 102 is provided in the injection portion 92 between the flat portion 54 and the receding portion 56. As a result, as shown by arrows B2 and B3, the dust P passes through the notch 102 (left notch 103 and right notch 104) and is discharged to the outside of the injection portion 92 (push lever 94). Therefore, even if a gap occurs between the blade guide 44 and the mating material G due to recoil, the dust P can be prevented from entering the injection path 44A (FIG. 1).

[0099] In this way, the nail gun 90 can prevent the dust P from flowing from the ejection part 112 toward the supply part 72, and can also easily discharge the dust P to the outside from the ejection part 112. This improves the convenience of the nail gun 90.

[0100] Furthermore, in the nail gun 90, the inclined portion 97 is located between the flat portion 54 and the notch 102 in the circumferential direction of the end face 96. This allows the dust P to be guided toward the notch 102, while the dust P can be discharged outward in the left-right direction from between the inclined portion 97 and the mating material G, as shown by arrows B4 and B5.

[0101] [Configuration of the third embodiment] A nail gun 110 as a work machine according to the third embodiment will be described. Note that the same or similar components as those of the nail gun 10 (FIG. 1) and the nail gun 90 (FIG. 8) of the first and second embodiments will be denoted by the same reference numerals and will not be described again.

[0102] 11 shows an ejection unit 112 of a nail gun 110. In the nail gun 110, the ejection unit 42 (FIG. 1) of the nail gun 10 is replaced with the ejection unit 112. The configuration other than the ejection unit 112 is the same as that of the nail gun 10.

[0103] <Injection part> The ejection unit 112 ejects the nail N (FIG. 1) that has been struck by the striking unit 24 (FIG. 1) downward from the ejection path 44A. Specifically, the ejection unit 112 includes a blade guide 114 and a push lever 132 that is movable up and down along the blade guide 114.

[0104] <<Blade guide>> The blade guide 114 is an example of a base that defines the injection path 44A. The blade guide 114 is formed in a cylindrical shape with the imaginary axis C as its central axis. The injection path 44A and the injection port 44B are provided inside the blade guide 114. The blade guide 114 guides the driver blade 28 (FIG. 1) in the up-down direction. An end face 116 is provided at the lower end of the blade guide 114. In other words, the injection portion 112 has the end face 116 located at the lower end in the up-down direction. The end face 116 is provided only on the blade guide 114. Details of the end face 116 will be described later.

[0105] <<Push lever>> The push lever 132 is an example of a movable part that is provided so as to be movable in the up and down direction relative to the blade guide 44. Specifically, the push lever 132 is located outside and in front of the blade guide 44. The push lever 132 is also biased downward by a spring (not shown).

[0106] When the push lever 132 is pressed against the mating object G (FIG. 1), it moves upward against the biasing force of the spring. At this time, a predetermined signal is output to the control unit 80 (FIG. 1). The push lever 132 has a contact portion 134 that comes into contact with the mating object G, and a plate portion 48 (FIG. 12) that extends upward from the front end of the contact portion 134. The contact portion 134 and the plate portion 48 are integrally formed.

[0107] The contact portion 134 is located on the front side with respect to the imaginary axis C. The contact portion 134 has a U-shaped outer shape that opens rearward when viewed from the top-bottom direction. In other words, the push lever 132 is not tubular. Furthermore, the push lever 132 surrounds (covers) the front portion of the blade guide 114 from the front, but does not surround (cover) the rear portion of the blade guide 114. The underside 135 of the contact portion 134 has, as an example, a flat portion 54. In the nail driver 110, the contact between the flat portion 54 and the target material G makes it easier to maintain the posture when driving the nail N into the target material G.

[0108] <End face of injection part> The end surface 116 has a flat portion 118, a recessed portion 122, and a notch 124. An imaginary line connecting the imaginary axis C and the innermost left end of the flat portion 118 is defined as boundary line A6. An imaginary line connecting the imaginary axis C and the innermost right end of the flat portion 118 is defined as boundary line A7.

[0109] The ranges of the flat portion 118, the recessed portion 122, and the cutout portion 124 are expressed using central angles. Specifically, when the end face 116 is viewed from below in the vertical direction, the ranges of the flat portion 118, the recessed portion 122, and the cutout portion 124 are expressed using the central angle (unit: degrees) of an imaginary circle R centered at a point on the imaginary axis C.

[0110] <<Flat area>> The flat portion 118 includes a portion located in front of the imaginary axis C and a portion located behind the imaginary axis C. The flat portion 118 extends to surround the imaginary axis C. The flat portion 118 is a planar portion perpendicular to the up-down direction. The range in which the flat portion 118 is provided is within a range of a central angle θ7 from boundary line A6 to boundary line A7 in the circumferential direction of the imaginary circle R. The central angle θ7 is, for example, approximately 220 degrees. In other words, both circumferential ends of the flat portion 118 extend beyond the imaginary axis C to the rear side. The boundary line A6 represents the boundary between the flat portion 118 and a left cutout portion 126, which will be described later. The boundary line A7 represents the boundary between the flat portion 118 and a right cutout portion 128, which will be described later.

[0111] <<Retreat section>> The receding portion 122 is located rearward with respect to the imaginary axis C, and is located above the flat portion 118 when viewed from the left-right direction. The receding portion 122 is formed in a flat shape. The receding portion 122 is located along the front-rear direction. The receding portion 122 is provided on the end face 116, rearward with respect to the imaginary axis C, within a range of a central angle θ8 in the circumferential direction of the imaginary circle R. The central angle θ8 is the central angle from the boundary line A8 to the boundary line A9. Specifically, the central angle θ8 is set within a range greater than 0 degrees and equal to or less than 40 degrees. The receding portion 122 is an example of a suppression portion that suppresses the dust P from flowing rearward toward the supply portion 72.

[0112] As shown in FIG. 12, when viewing the emission section 112 from the left-right direction, an imaginary line connecting the rear end position P3 of the flat section 118 and the front end position P4 of the receding section 122 is defined as an imaginary line M4. The imaginary line M4 may be considered to be an imaginary plane extending in the left-right direction. The imaginary line M4 extends along a diagonal direction that intersects with an imaginary line M5 that extends the flat section 118 in the front-rear direction. When viewed from the left-right direction, the angle formed by the imaginary line M4 and the imaginary line M5 is defined as an inclination angle θC. The receding section 122 is located above the imaginary line M5.

[0113] <<Notch>> As shown in FIG. 11, the cutout 124 is located between the flat portion 118 and the recessed portion 122 in the circumferential direction of the imaginary circle R, and is located above the imaginary line M4 (FIG. 12). The cutout 124 is recessed above the recessed portion 122 with respect to the imaginary line M4. The cutout 124 is cut out in a triangular shape when viewed from the left and right. The part of the cutout 124 that is the longest distance L2 (FIG. 12) from the imaginary line M4 is defined as the deepest part 124A. The cutout 124 is an example of a discharge portion that guides the dust P so that the dust P is discharged in a direction different from the front-rear direction.

[0114] As an example, the cutout portion 124 has a left cutout portion 126 and a right cutout portion 128. In other words, the cutout portions 124 are provided on both sides of the end surface 116 in the left-right direction.

[0115] The left cutout 126 is located on the left side of the imaginary axis C. The left cutout 126 is provided on the end face 116 such that the central angle θ9 is within the range of 30 degrees to 80 degrees. The right cutout 128 is located on the right side of the imaginary axis C. The right cutout 128 is provided on the end face 116 such that the central angle θ10 is within the range of 30 degrees to 80 degrees. In this way, the central angle of the cutout 124 means the central angle θ9 of the left cutout 126 or the central angle θ10 of the right cutout 128.

[0116] The deepest part 124A of the cutout part 124 is provided in one location each in the left cutout part 126 and the right cutout part 128. The deepest part 124A is provided within the range of the central angle θ9 and the central angle θ10, in which the central angle is in the range of 35 degrees or more and 55 degrees or less. As an example, the deepest part 124A is provided at a position where the central angle θ9 and the central angle θ10 are both 45 degrees with respect to the boundary line A1.

[0117] [Operation of the third embodiment] As shown in FIG. 12 , when the nail N is driven into a mating material G in the nail driver 110, dust P is raised up. The movement of the dust P generated in front of the imaginary axis C is restricted by the flat portion 118 and the mating material G, and therefore the dust P tends to flow rearward of the imaginary axis C. In addition, some of the dust P generated rearward of the imaginary axis C is restricted from moving rearward by contact with the edge (inner surface) of the receding portion 122. For this reason, the dust P is less likely to flow toward the supply unit 72, which is located rearward of the ejection unit 112.

[0118] Here, a notch 124 is formed in the injection part 112 between the flat part 118 and the receding part 122. As a result, the dust P passes through the notch 124 and is discharged to the outside of the injection part 112 (push lever 132), as shown by arrow B4. Therefore, even if a gap occurs between the blade guide 114 and the target material G, the dust P can be prevented from entering the injection path 44A.

[0119] In this way, the nail gun 110 can prevent the dust P from flowing from the ejection part 112 toward the supply part 72, and can also easily discharge the dust P to the outside from the ejection part 112. This improves the convenience of the nail gun 110.

[0120] Furthermore, in the nail gun 110, a notch 124 is provided in the end surface 116 of the blade guide 114. This allows dust P present near the injection port 44B to be discharged from the injection path 44A through the notch 124 to the outside.

[0121] [Modification of this embodiment] This embodiment is not limited to the first, second, and third embodiments described above, and various modifications are possible without departing from the spirit of the present invention. Modifications of this embodiment will be described below. Modifications of common parts of the nail driver 10, the nail driver 90, and the nail driver 110 will be described using the nail driver 10.

[0122] In the nail driver 10, a portion of the notch 58 may protrude below the imaginary line M1. The notch 58 may be provided on only one of the right and left sides of the end surface 52. The end surface 52 may be provided on both the blade guide 44 and the push lever 46.

[0123] The central angles θ3 and θ4 of the cutout 58 may be smaller than 30 degrees or larger than 80 degrees. The portion of the cutout 58 where the distance L1 from the imaginary line M1 is longest may be provided in a range where the central angles θ3 and θ4 are smaller than 35 degrees or larger than 55 degrees.

[0124] The flat portion 54 may be provided in a range of the end surface 52 where the central angle θ1 is smaller than 180 degrees. In a configuration in which a notch is provided in the blade guide 44, the width W1 in the left-right direction of the flat portion 54 may be smaller than the width W2 in the left-right direction of the injection port 44B.

[0125] The handle 15 may be provided at a position overlapping with the ejection portion 42 when viewed from above and below.

[0126] The operating mechanism is not limited to one having the solenoid 76, but may be one that drives the feeder using a motor, for example. [Explanation of symbols]

[0127] 10: Nail gun, 12: Housing, 13: Cylinder accommodating section, 14: Motor accommodating section, 15: Handle, 16: Mounting section, 18: Battery pack, 19: Trigger, 22: Magazine, 24: Striking section, 26: Piston, 28: Driver blade, 32: Striking force generating section, 34: Cylinder, 35: Piston chamber, 36: Chamber, 37: Pressure accumulator, 42: Injection section, 44: Blade guide, 44A: Injection path, 44B: Injection port, 44C: Underside, 46: Push lever, 47: Cylinder section, 48: Plate section, 49: Hole section, 49A: arc portion, 49B: recessed portion, 49C: flat portion, 49D: recessed portion, 52: end surface, 54: flat portion, 56: setback portion, 58: notch portion, 58A: deepest portion, 59: left notch portion, 61: right notch portion, 62: drive portion, 64: motor, 65: output shaft, 66: reduction mechanism portion, 68: rotating portion, 69: pinwheel, 72: supply portion, 74: feeder, 76: solenoid, 80: control portion, 90: nail gun, 92: ejection portion, 94: push lever, 96: end surface, 97: inclined portion, 98: left inclined portion, 99: right inclined portion, 102 : Notch, 103: Left notch, 104: Right notch, 110: Nail gun, 112: Injection part, 114: Blade guide, 116: End face, 118: Flat part, 122: Retraction part, 124: Notch, 124A: Deepest part, 126: Left notch, 128: Right notch, 132: Push lever, 134: Contact part, 135: Underside, A1: Boundary line, A2: Boundary line, A3: Boundary line, A4: Boundary line, A5: Boundary line, A6: Boundary line, A7: Boundary line, A8: Boundary line, A9: Boundary line, B1: Arrow, B2: Arrow, B3: Arrow, B 4: Arrow, C: Virtual axis, G: Mating material, K: Direction, L1: Distance, L2: Distance, M1: Virtual line, M2: Virtual line, M3: Virtual line, M4: Virtual line, M5: Virtual line, N: Nail, P: Dust, P1: Rear end position, P2: Front end position, P3: Rear end position, P4: Front end position R: virtual circle, W1: width, W2: width, θ1: central angle, θ2: central angle, θ3: central angle, θ4: central angle, θ5: central angle, θ6: central angle, θ7: central angle, θ8: central angle, θ9: central angle, θ10: central angle, θA: tilt angle, θB: tilt angle, θC: tilt angle

Claims

1. a striking portion that strikes the fastener; an ejection section that ejects the fastener struck by the striking section toward one side in the first direction along an imaginary axis that extends in the first direction; an operating mechanism located on one side of the ejection unit in a second direction perpendicular to the first direction, the emission section has an end surface located at an end on one side in the first direction, The end surface is a flat portion located on the other side of the imaginary axis in the second direction and extending so as to surround the imaginary axis; a recessed portion located on one side of the virtual axis in the second direction and on the other side of the flat portion in the first direction; a notch located between the flat portion and the recessed portion in the second direction when viewed from a third direction perpendicular to both the first direction and the second direction, and located away from an imaginary line connecting an end of the flat portion on one side in the second direction and an end of the recessed portion on the other side in the second direction; A work machine having the above construction.

2. When viewed from the third direction, the notch portion is recessed toward the other side in the first direction relative to the imaginary line relative to the recessed portion. The work machine according to claim 1 .

3. The notch is provided on both sides of the end surface in the third direction. The work machine according to claim 1 .

4. When the end face is viewed from one side in the first direction in the first direction, and a range is expressed using a central angle of an imaginary circle having a center at a point on the imaginary axis line, the cutout portion is provided on the end face within a range of the central angle of 30 degrees or more and 80 degrees or less. The work machine according to claim 1 .

5. The portion of the notch that is farthest from the virtual line is provided with the central angle in the range of 35 degrees to 55 degrees. The work machine according to claim 4.

6. The flat portion is provided in a range of the end face where the central angle is 180 degrees or more. The work machine according to claim 4 or 5.

7. The flat portion is provided in the end face within a range in which the central angle is 180 degrees. The work machine according to claim 6.

8. a width in the third direction of the flat portion is greater than a width in the third direction of an injection port of the injection portion; The work machine according to claim 1 .

9. A handle is provided for the operator to grasp, the handle is located on one side of the ejection portion in the second direction when viewed from the first direction. The work machine according to claim 1 .

10. The actuation mechanism includes: a feeder that supports the stopper so that the stopper can move toward an injection position in the injection unit; a solenoid for driving the feeder; having The work machine according to claim 1 .

11. The injection unit includes: a base defining an ejection path through which the fastener is ejected; a movable portion provided so as to be movable relative to the base portion in the first direction, The end surface is provided on the movable part. The work machine according to claim 1 .

12. a striking portion that strikes the fastener toward one side in the first direction; a biasing portion that applies a biasing force to the striking portion so as to strike the fastener; A motor; a winding section that receives the driving force of the motor and winds up the striking section toward the other side in the first direction against the biasing force of the biasing section; a cylindrical injection portion that injects the fastener struck by the striking portion from an injection path extending in the first direction toward one side in the first direction; a magazine containing a plurality of the fasteners; a supply mechanism that is located on one side of the ejection unit in a second direction perpendicular to the first direction and that supplies the fasteners stored in the magazine to the ejection unit, The injection unit includes: a suppression unit that suppresses the dust from flowing toward the supply mechanism in one direction in the second direction; a discharge section that guides the dust so that the dust is discharged in a direction different from the second direction.

Images