Work machine

Abstract

The large size of the working machine is avoided, and the driving precision of the working machine is improved. A driving machine (1) according to one embodiment comprises: an injection unit (6) that accommodates a stopper (40); and a drive blade (20) which is capable of reciprocating in a first direction and a second direction opposite to the first direction, and which strikes a stopper (40) housed in the ejection part (6) by moving in the first direction. The ejection section (6) has: a vane guide (50) that forms one side of an ejection path (6a) for supplying the stopper (40); a guide plate (60) that faces the vane guide (50) and forms the other side of the ejection path (6a); and a protrusion (56) provided on the vane guide (50). The drive blade (20) is provided with a recessed portion that receives the protruding portion (56). The projection (56) is located on the side of the stopper (40) supplied to the injection path (6a), and prevents all or part of the stopper (40) from disengaging from the injection path (6a).

Description

Technical Field

[0001] The present invention relates to a working machine suitable for the operation of fixing or combining target materials. Background Art

[0002] As an example of the above-mentioned working machine, a driving machine for driving a stopper into a target material is known. Patent document 1 describes a driving machine having a head forming an injection path and a driving blade reciprocating in the injection path. The stopper is supplied to the injection path formed by the head. The stopper supplied to the injection path is struck by the driving blade and driven into the target material.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-34258 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The driving blade reciprocates in the injection path formed by the machine head, so it is necessary to avoid contact (interference) between the machine head and the driving blade. As a result, the shape of the machine head is restricted, and sometimes the stopper is not positioned sufficiently in the injection path. In this case, there is a concern that the stopper may be tilted or deformed due to the impact during the impact, thereby reducing the driving accuracy.

[0008] On the other hand, if a limiting part is provided on the head of the machine to prevent the stopper from tilting or deforming, the driving blade may be elongated to avoid contact (interference) between the limiting part and the driving blade. Moreover, the elongated driving blade may increase the size of the whole working machine.

[0009] An object of the present invention is to avoid enlarging a working machine and to improve the driving accuracy of the working machine.

[0010] Means for solving problems

[0011] A driver according to one embodiment includes: an ejection section that accommodates a stopper; and a striking section that can reciprocate in a first direction and a second direction, the second direction being opposite to the first direction, and strikes the stopper accommodated in the ejection section by moving in the first direction. The ejection section includes: a first wall that forms one side of an ejection path for supplying the stopper; a second wall that is opposite to the first wall and forms the other side of the ejection path; and a convex portion that is provided on at least one of the first wall and the second wall. The striking section includes a concave portion that receives the convex portion. Furthermore, the convex portion is located on the side of the stopper supplied to the ejection path, thereby preventing all or part of the stopper from escaping from the ejection path.

[0012] Effects of the Invention

[0013] According to the present invention, it is possible to improve the driving accuracy of the working machine while avoiding an increase in the size of the working machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a left side view of the driver.

[0015] Figure 2 This is the front view of the punching machine.

[0016] Figure 3 It is a cross-sectional view of the driver.

[0017] Figure 4 It is another cross-sectional view of the driving machine.

[0018] Figure 5A This is a front side perspective view of the drive blade.

[0019] Figure 5B This is a perspective view of the back side of the drive blade.

[0020] Figure 6 This is an enlarged stereoscopic view of the injection portion.

[0021] Fig. 7A It is an enlarged perspective view of the blade guide.

[0022] Figure 7B It is an enlarged stereoscopic view of the guide plate.

[0023] Figure 8 It is a cross-sectional view showing the emission portion when the drive blade is in the standby position.

[0024] Fig. 9 It is a cross-sectional view showing the emission portion when the drive blade is at the top dead center.

[0025] Fig.10 It is a cross-sectional view showing the emission portion when the drive blade is located at the bottom dead center.

[0026] Fig.11 It is along Fig. 9 A partial enlarged cross-sectional view of the CC line in FIG.

[0027] Fig.12 is along Fig.10 A partial enlarged cross-sectional view of line DD in FIG.

[0028] Fig.13 It is a partially enlarged cross-sectional view showing another example of the embodiment.

[0029] Fig.14 It is a partially enlarged cross-sectional view showing still another example of the embodiment. DETAILED DESCRIPTION

[0030] (First embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in all the drawings referred to for describing the embodiment, the same reference numerals are used for the same or substantially the same structures and elements. In addition, in principle, the structure and elements described once will not be described repeatedly.

[0031] <Overview of Driver> The working machine of the present embodiment is a driver suitable for working to fix or join target materials. Figure 1 It is a left side view of the driver 1 according to the present embodiment. Figure 2 It is a front view of the driver 1 of this embodiment.

[0032] The driver 1 includes a cylinder housing 2, a handle 3, a motor housing 4, a cartridge 5, and an ejection unit 6. The cylinder housing 2 is generally cylindrical. The handle 3 and the motor housing 4 extend in a direction intersecting the cylinder housing 2, and one end of each of the handle 3 and the motor housing 4 is connected to the cylinder housing 2. On the other hand, the other end of the handle 3 and the motor housing 4 is connected to a connection unit 7. From another perspective, the rear ends of the handle 3 and the motor housing 4 are connected to each other via the connection unit 7.

[0033] A battery mounting portion that can detach and install a battery (storage battery) 8 is provided on the back of the connecting portion 7. The battery 8 is a power source for the electric motor 30 described later. The type of the battery 8 is not particularly limited, and the battery 8 in this embodiment is a lithium ion battery. As another example of the battery 8, a nickel-hydrogen battery, a lithium-ion polymer battery, and a nickel-cadmium battery can be cited.

[0034] Figure 3 , Figure 4 is a cross-sectional view of the driver 1. Figure 3 The cross section shown is along Figure 2 The cross section of the AA line in. In addition, Figure 4 The cross section shown is along Figure 1 The cross section of line BB in .

[0035] The cylinder 10 and the pressure accumulation container 11 are accommodated in the cylinder housing 2, and the piston 12 is accommodated in the cylinder 10. The piston 12 can reciprocate in the cylinder 10 along the center line direction of the cylinder 10.

[0036] The electric motor 30 and the speed reduction mechanism 31 are accommodated in the motor housing 4 . In addition, the trigger 13 is provided on the handle 3 , and the push rod 14 is provided adjacent to the ejection unit 6 . Furthermore, the control unit (control board) 15 is accommodated in the connection unit 7 .

[0037] When a predetermined operation is performed under a state where a predetermined condition is satisfied, the control unit 15 supplies power from the battery 8 to the electric motor 30 to operate the electric motor 30. For example, when the trigger 13 is operated while the push rod 14 is pressed against the target material, power is supplied to the electric motor 30 to operate the electric motor 30. The output (driving force) of the electric motor 30 is transmitted to the driving blade 20 fixed to the piston 12 via the speed reduction mechanism 31 and the power transmission mechanism 32.

[0038] The cassette 5 is disposed below the motor case 4. One end side of the cassette 5 in the longitudinal direction is connected to the emission unit 6, and the other end side of the cassette 5 in the longitudinal direction is connected to the motor case 4.

[0039] The cassette 5 stores a plurality of stoppers arranged in a row and supplies the stored stoppers to the ejection unit 6. More specifically, the cassette 5 includes a feeder 5a ( 520 ) that supplies the stored stoppers to the ejection unit 6 one by one. Figure 1 ).

[0040] The injection unit 6 is disposed below the cylinder housing 2 and in front of the cassette 5. The injection unit 6 temporarily stores the stopper supplied from the cassette 5. From another perspective, the stopper is sequentially fed from the cassette 5 into the injection unit 6.

[0041] The driving blade 20 reciprocates in a predetermined direction, thereby striking the stopper stored in the ejection portion 6 and driving it into the target material. From another perspective, the driving blade 20 reciprocates in a predetermined direction, thereby driving the stopper out of the ejection portion 6. That is, the driving blade 20 is an example of the striking portion of the present invention. When the stopper is driven out of the ejection portion 6 by the driving blade 20, the feeder 5a of the cassette 5 feeds the next stopper into the ejection portion 6.

[0042] <Cylinder and pressure storage container> The cylinder 10 and the pressure storage container 11 are connected to each other to form a pressure chamber 16. The pressure chamber 16 is filled with a compressed fluid. The type of fluid filled in the pressure chamber 16 is not particularly limited, but the fluid in this embodiment is air. As another example of the fluid filled in the pressure chamber 16, an inert gas such as nitrogen and a rare gas can be cited.

[0043] The air filled in the pressure chamber 16 is one of driving sources for moving the piston 12 and the driving blade 20 in a predetermined direction. Driving the piston 12 and the driving blade 20 by the air filled in the pressure chamber 16 will be described again later.

[0044] <Piston and driving blade> As described above, the piston 12 can reciprocate in the centerline direction of the cylinder 10. From another perspective, the piston 12 can reciprocate in a first direction D1 away from the pressure storage container 11 and a second direction D2 close to the pressure storage container 11.

[0045] The driving blade 20 is integrated with the piston 12 and reciprocates together with the piston 12. That is, the driving blade 20 reciprocates in a first direction D1 away from the pressure storage container 11 and in a second direction D2 close to the pressure storage container 11. The driving blade 20 strikes a stopper accommodated in the ejection portion 6 by moving in the first direction D1.

[0046] In the following description, the moving directions of the piston 12 and the driving blade 20 are set as the up-down direction. Therefore, in the following description, the movement of the piston 12 and the driving blade 20 in the first direction D1 is sometimes referred to as "descending". In addition, the movement of the piston 12 and the driving blade 20 in the second direction D2 is sometimes referred to as "ascending".

[0047] <Trigger and Push Rod> The push rod 14 is always urged downward (in the first direction D1) by an elastic member (e.g., a coil spring). When the front end of the push rod 14 is pressed against the target material, the push rod 14 rises against the force of the elastic member. When the push rod 14 rises to a predetermined position, the push rod switch is activated and a signal (push rod signal) is input to the control unit 15.

[0048] In addition, when the trigger 13 is operated, the trigger switch is operated, and a signal (trigger signal) is input to the control unit 15. The input of the push rod signal and the trigger signal is one of the prescribed conditions for the control unit 15 to supply power to the electric motor 30. When the trigger signal is input while the push rod signal is input, the control unit 15 supplies power to the electric motor 30.

[0049] <Drive blade details> Figure 5A is a front side perspective view of the driving blade 20, Figure 5B 2 is a rear perspective view of the drive blade 20. The drive blade 20 is a rod-shaped metal member including a main body 21, a plurality of racks 22, and a fixing portion 23.

[0050] The main body 21 has an elongated shape extending in the center line direction of the cylinder 10. The fixing portion 23 is provided at one end (upper end) in the longitudinal direction of the main body 21 and fixed to the piston 12. More specifically, a through hole 23a through which a fixing pin is inserted is formed in the fixing portion 23, and both ends of the fixing pin inserted in the through hole 23a are supported by the piston 12.

[0051] The rack portion 22 is provided on one side of the driving blade 20. More specifically, six rack portions 22 are provided on one side of the main body portion 21 so as to protrude in the same direction relative to the main body portion 21. These rack portions 22 are arranged in a row along the longitudinal direction of the main body portion 21.

[0052] In the following description, the rack portion 22 closest to the fixing portion 23 in the length direction of the main body 21 is sometimes referred to as the "upper rack portion 22a", and the rack portion 22 farthest from the fixing portion 23 is sometimes referred to as the "lower rack portion 22b" to distinguish them from other rack portions 22. In short, four rack portions 22 are arranged at equal intervals between the upper rack portion 22a and the lower rack portion 22b.

[0053] A guide protrusion 24 is formed on the front surface of the driving blade 20. More specifically, a guide protrusion 24 is formed on the front surface of the main body 21. The guide protrusion 24 is provided at the center or substantially the center in the width direction of the main body 21 and extends in the longitudinal direction of the main body 21.

[0054] A recess 25 is formed on the back of the driving blade 20. More specifically, the recess 25 is provided between the main body 21 and the rack 22, and extends along the arrangement direction of the rack 22 (= the length direction of the main body 21). The recess 25 extends from the lower rack 22b to the upper rack 22a, and is open at both ends in the length direction.

[0055] From another perspective, the recess 25 is a groove provided on the back surface of the drive blade 20. The recess 25 in this embodiment is formed by cutting the back surface of the drive blade 20, but the recess 25 may be formed by a method other than cutting (for example, punching).

[0056] <Electric motor, speed reduction mechanism> See again Figure 3 , Figure 4 The electric motor 30 is a DC brushless motor composed of a stator, a rotor, a coil, etc. The speed reduction mechanism 31 is a planetary gear type multi-stage speed reduction mechanism to which the rotational driving force output from the electric motor 30 is input. The speed reduction mechanism 31 reduces the speed of the input rotational driving force and increases and outputs the torque.

[0057] <Power transmission mechanism> The power transmission mechanism 32 is composed of a wheel 33 to which the output of the speed reduction mechanism 31 is input, a plurality of pins 34 provided on the wheel 33, and the like. Eight pins 34 are provided on the wheel 33 along the rotation direction of the wheel 33. From another perspective, the eight pins 34 are arranged on the circumference of a circle centered at the rotation center of the wheel 33.

[0058] In addition, the pin 34b at one end of the arrangement direction among the eight pins 34 is thicker than the other pins 34. In the following description, the pin 34b is sometimes referred to as the "terminal pin 34b", and the pin 34 farthest from the terminal pin 34b in the arrangement direction is referred to as the "starting end pin 34a" to distinguish from the other pins 34. In short, six pins 34 are arranged at equal intervals between the starting end pin 34a and the terminal pin 34b.

[0059] Wheel 33 Figure 4 When the wheel 33 rotates, the plurality of pins 34 are sequentially engaged with the plurality of rack portions 22 provided on the drive blade 20. Specifically, the starting end pin 34a is initially engaged with the upper end rack portion 22a. Thereafter, the plurality of pins 34 are sequentially engaged with the plurality of rack portions 22. As a result, the rotational force of the wheel 33 is transmitted to the drive blade 20, and the drive blade 20 and the piston 12 move along the second direction D2. That is, the piston 12 and the drive blade 20 rise.

[0060] When the piston 12 and the driving blade 20 rise, the air filled in the pressure chamber 16 is compressed, and the internal pressure of the pressure chamber 16 rises. From another perspective, the air spring is compressed. Thereafter, when the engagement between the terminal pin 34b and the lower rack portion 22b is released, the rotational force of the wheel 33 is no longer transmitted to the driving blade 20. As a result, the piston 12 and the driving blade 20 move in the first direction D1 by the air pressure in the pressure chamber 16. That is, the piston 12 and the driving blade 20 descend.

[0061] <Top Dead Center·Bottom Dead Center> The drive blade 20 reciprocating in the first direction D1 and the second direction D2 together with the piston 12 reciprocates between the end of the first direction D1 side of the moving stroke, i.e., the bottom dead center, and the end of the second direction D2 side of the moving stroke, i.e., the top dead center. In addition, the moving stroke of the drive blade 20 in this embodiment is 62 mm.

[0062] The piston 12 moving in the first direction D1 collides with the buffer 17 disposed at the lower end of the cylinder 10 and stops. That is, the position of the piston 12 when contacting the buffer 17 ( Figure 4 The position shown in FIG. 1 is the bottom dead center of the piston 12. When the piston 12 reaches the bottom dead center, the drive blade 20 that moves with the piston 12 also reaches the bottom dead center. That is, the position of the drive blade 20 when the piston 12 abuts against the buffer 17 ( Figure 4The position shown in FIG. 1 is the bottom dead center of the driving blade 20. In other words, the position of the driving blade 20 when the piston 12 is at the bottom dead center is the bottom dead center of the driving blade 20.

[0063] On the other hand, when the engagement between the terminal pin 34b and the lower rack portion 22b is released, the piston 12 moving along the second direction D2 begins to descend toward the bottom dead center. That is, the position of the piston 12 at the moment when the engagement between the terminal pin 34b and the lower rack portion 22b is released is the top dead center of the piston 12. And, at the same time when the piston 12 begins to descend toward the bottom dead center, the drive blade 20 moving integrally with the piston 12 begins to descend toward the bottom dead center. That is, the position of the drive blade 20 at the moment when the engagement between the terminal pin 34b and the lower rack portion 22b is released is the top dead center of the drive blade 20. In other words, the position of the drive blade 20 when the piston 12 is at the top dead center is the top dead center of the drive blade 20.

[0064] <Injection section> Figure 6 It is an enlarged perspective view of the injection unit 6. The injection unit 6 includes a blade guide 50 and a guide plate 60 rotatably connected to the blade guide 50. In addition, the injection unit 6 is sometimes referred to as a "head portion".

[0065] The blade guide 50 and the guide plate 60 cooperate to form the injection path 6a of the supply stopper 40. In the present embodiment, the blade guide 50 forms one side of the injection path 6a, and the guide plate 60 forms the other side of the injection path 6a.

[0066] More specifically, when the guide plate 60 is rotated and overlapped on the blade guide 50, an ejection path 6a is formed between the two. From another perspective, when the blade guide 50 and the guide plate 60 are opposed to each other, a space that becomes the ejection path 6a is formed between the two. That is, in this embodiment, the blade guide 50 is equivalent to the first wall portion, and the guide plate 60 is equivalent to the second wall portion.

[0067] In addition, the stopper 40 of this embodiment has a first leg 41, a second leg 42 and a head 43, and has a generally U-shaped appearance. The first leg 41 and the second leg 42 form a pair and are parallel to each other. The head 43 connects one end of the first leg 41 and one end of the second leg 42. The stopper 40 is sometimes also called a "pin".

[0068] The blade guide 50 is provided with a pair of locking claws 51, and the guide plate 60 is provided with an annular locking hook 61. After the guide plate 60 is overlapped on the blade guide 50, when the locking hook 61 hooked on the locking claws 51 is lifted, the blade guide 50 and the guide plate 60 are fixed to each other.

[0069] When the operation part 62 connected to the upper part of the locking hook 61 is rotated upward, the locking hook 61 is lifted. On the other hand, when the operation part 62 is rotated downward, the locking hook 61 is pressed down, and the engagement of the locking hook 61 with the locking claw 51 is released.

[0070] <Blade Guide> Fig. 7A : is an enlarged perspective view of the blade guide 50. A connection portion 52 is integrally formed at the upper portion of the blade guide 50. The connection portion 52 includes a pair of opposing side wall portions 53 and a flange portion 54 extending outward from the lower end of each side wall portion 53.

[0071] A connecting hole 53a is provided in each side wall portion 53, and a bolt hole 54a is provided in each flange portion 54. The blade guide 50 is fixed to the holder 18 ( Figure 4 ).

[0072] The blade guide 50 is also provided with a substantially rectangular opening 55 communicating with the cassette 5. The opening 55 is provided between a pair of locking claws 51 and has a feeder 5a ( Figure 1 The stopper 40 is sent into the ejection part 6 through the opening 55 and is stored in the ejection part 6.

[0073] The convex portion 56 protruding toward the guide plate 60 is provided on one side of the opening portion 55. From another perspective, the convex portion 56 is a rib protruding toward the guide plate 60.

[0074] The convex portion 56 extends along the edge of the opening 55. More specifically, one end side (upper end side) of the convex portion 56 extends beyond the opening 55 toward the connecting portion 52. The other end side (lower end side) of the convex portion 56 extends to the center or approximately the center of the opening 55 in the longitudinal direction.

[0075] like Figure 6 As shown, when the stopper 40 is supplied to the ejection path 6a through the opening 55, the convex portion 56 provided on the edge of the opening 55 is located on the side of the stopper 40. More specifically, the convex portion 56 is located on the side of the first leg portion 41 of the stopper 40 supplied to the ejection path 6a, and extends parallel or substantially parallel to the first leg portion 41.

[0076] <Guide Plate> Figure 7B 60 is an enlarged perspective view of the guide plate 60. The guide plate 60 is provided with a guide protrusion 24 ( Figure 5A ) can be fitted into the guide groove 63. The guide groove 63 restricts the movement of the guide protrusion 24 in the direction intersecting the longitudinal direction and guides the lifting and lowering of the driving blade 20.

[0077] A through hole 64 is provided at the upper portion of the guide plate 60. When the upper portion of the guide plate 60 is inserted between the two side wall portions 53 of the blade guide 50, the through hole 64 communicates with each connection hole 53a. The guide plate 60 is rotatably connected to the blade guide 50 by a connection pin that passes through the connection hole 53a and the through hole 64.

[0078] <Functions of Concave and Concave Parts> Figure 8 1 is a partial cross-sectional view showing the emission portion 6 when the driving blade 20 is in the standby position. Fig. 9 1 is a partial cross-sectional view showing the ejection portion 6 when the drive blade 20 is at the top dead center. Fig.10 1 is a partial cross-sectional view showing the ejection portion 6 when the drive blade 20 is located at the bottom dead center.

[0079] in addition, Fig.11 It is along Fig. 9 A partial enlarged cross-sectional view of the CC line in the figure. Fig.12 It is along Fig.10 A partial enlarged cross-sectional view of line DD in FIG.

[0080] In addition, the standby position is a position between the upper dead center and the lower dead center. Figure 3 ) After the driving action is completed, the driving blade 20 is raised from the bottom dead point to the standby position, and then the electric motor 30 is stopped.

[0081] like Figure 8 As shown, when the driving blade 20 is in the standby position, the front end of the driving blade 20 is located below the head 43 of the stopper 40. From another perspective, the driving blade 20 in the standby position partially blocks the entrance of the injection path 6a. As a result, the supply of the stopper 40 to the injection path 6a is restricted.

[0082] like Fig. 9 As shown, when the driving blade 20 moves from the standby position toward the top dead center and the front end of the driving blade 20 moves to a position above the head 43 of the stopper 40, the supply restriction of the stopper 40 is released. After that, the stopper 40 is supplied to the injection path 6a by the feeder 5a.

[0083] As described above, when the stopper 40 is supplied to the injection path 6a, the convex portion 56 provided on the blade guide 50 is located on the side of the stopper 40. More specifically, Fig.11 As shown, the protrusion 56 is located on the side of the first leg portion 41 of the stopper 40 .

[0084] Thereafter, the driving blade 20 moves from the top dead center toward the bottom dead center and strikes the stopper 40 in the ejection path 6a. At this time, there is a convex portion 56 on the side of the stopper 40. As a result, the stopper 40 is restricted from tilting and deforming toward the convex portion 56 side due to the impact. That is, the convex portion 56 suppresses all or part of the stopper 40 from protruding out of the ejection path 6a, thereby improving the driving accuracy.

[0085] Furthermore, the inclination or deformation of the stopper 40 to the side opposite to the convex portion 56 side is restricted by the inner side surface 55 a of the opening portion 55 located on the side of the second leg portion 42 .

[0086] like Fig.10 , Fig.12 As shown, during the process of the driving blade 20 descending as described above, the convex portion 56 provided on the blade guide 50 enters the concave portion 25 provided on the driving blade 20. From another perspective, the concave portion 25 provided on the driving blade 20 receives the convex portion 56 provided on the blade guide 50 during the process of the driving blade 20 descending. From another perspective, the driving blade 20 passes over the convex portion 56 without interfering with the convex portion 56. Therefore, the movement of the driving blade 20 is not hindered by the convex portion 56 provided on the blade guide 50. That is, the concave portion 25 prevents the driving blade 20 from interfering with the blade guide 50 (convex portion 56).

[0087] Here, the convex portion 56 does not enter the concave portion 25 when the driving blade 20 is at the top dead center (see Figure 8 ), the convex portion 56 enters the concave portion 25 during the process of the driving blade 20 moving from the top dead center to the bottom dead center. More specifically, the convex portion 56 enters the concave portion 25 after the driving blade 20 passes the standby position.

[0088] In addition, when the driving blade 20 is at the bottom dead center, the convex portion 56 enters the concave portion 25 until halfway in the length direction of the concave portion 25. More specifically, when the driving blade 20 is at the bottom dead center, the upper end of the convex portion 56 does not reach the upper end of the concave portion 25, but is located between the second rack portion 22 and the third rack portion 22 from the bottom (see Fig.10 ).

[0089] From another perspective, Figure 5B The total length L1 of the recess 25 shown is a length such that the upper end of the convex portion 56 will not reach the upper end of the recess 25 even if the driving blade 20 reaches the bottom dead center. Figure 8 The total length L2 of the convex portion 56 shown is the length at which the upper end of the convex portion 56 does not reach the upper end of the concave portion 25 even if the driving blade 20 reaches the bottom dead center. Specifically, the total length L1 of the concave portion 25 in this embodiment is 58.0 mm, and the total length L2 of the convex portion 56 is 25.5 mm. However, even if the length of the convex portion 56 is less than 25.5 mm, as long as it is arranged Figure 8 The length L1 of the recessed portion 25 may be changed as long as the interference between the convex portion 56 and the driving blade 20 can be prevented.

[0090] Similarly, as long as the interference between the convex portion 56 and the driving blade 20 can be prevented, the Fig.12 The height H of the convex portion 56 is shown. If the height H of the convex portion 56 is increased, the positioning effect with respect to the stopper 40 is improved.

[0091] However, when the height H of the convex portion 56 is increased, the depth of the concave portion 25 needs to be increased accordingly. However, if the depth of the concave portion 25 is too deep, the strength and durability of the driving blade 20 may be reduced. In view of these circumstances, the height H of the convex portion 56 is preferably within a range of 5% to 80% of the thickness T of the driving blade 20.

[0092] In addition, the height H of the convex portion 56 in the present embodiment is 0.4 mm, and the thickness T of the drive blade 20 is 2.5 mm. That is, the height H of the convex portion 56 is 16% of the thickness T of the drive blade 20.

[0093] (Other embodiments) The present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above-mentioned embodiment, the convex portion 56 is provided on the blade guide 50. In addition, the concave portion 25 for receiving the convex portion 56 is provided on the back side of the driving blade 20 opposite to the blade guide 50.

[0094] However, if Fig.13 As shown in FIG. 5 , there is also an embodiment in which a convex portion 56 is provided on the guide plate 60 and a concave portion 25 is provided on the front surface of the driving blade 20. Fig.14 As shown, there is also an embodiment in which the convex portion 56 is provided on both the blade guide 50 and the guide plate 60, and the concave portion 25 is provided on both surfaces of the driving blade 20. According to these embodiments, it can be understood that the convex portion 56 can be provided on only one of the first wall portion and the second wall portion, or can be provided on both.

[0095] Explanation of symbols

[0096] 1: driver; 2: cylinder housing; 3: handle; 4: motor housing; 5: magazine; 5a: feeder; 6: ejector; 6a: ejector path; 7: connection; 8: battery (accumulator); 10: cylinder; 11: pressure storage container; 12: piston; 13: trigger; 14: push rod; 15: control unit (control substrate); 16: pressure chamber; 17: buffer; 18: holder; 20: drive blade; 21: main body; 22: rack; 22a: upper rack; 22b: lower rack; 23: fixing unit; 23a: through hole; 24: guide protrusion; 25: recess; 30: Electric motor; 31: speed reduction mechanism; 32: power transmission mechanism; 33: wheel; 34: pin; 34a: starting end pin; 34b: terminal end pin; 40: stopper; 41: first leg; 42: second leg; 43: head; 50: blade guide; 51: locking claw; 52: connecting portion; 53: side wall portion; 53a: connecting hole; 54: flange portion; 54a: bolt hole; 55: opening portion; 55a: inner side surface; 56: convex portion; 60: guide plate; 61: locking hook; 62: operating portion; 63: guide groove; 64: through hole; D1: first direction; D2: second direction.

Claims

1. A working machine, characterized in that: have: an ejection portion that receives the stopper; and a striking part capable of reciprocating in a first direction and a second direction, the second direction being opposite to the first direction, and striking the stopper accommodated in the ejection part by moving in the first direction, The ejection portion includes: a first wall portion forming one side of an ejection path for supplying the stopper; a second wall portion, which is opposite to the first wall portion and forms the other side of the ejection path; and a convex portion, which is provided on at least one of the first wall portion and the second wall portion. The striking part has a concave part for receiving the convex part. The convex portion is located on the side of the stopper supplied to the injection path, and suppresses all or part of the stopper from being separated from the injection path.

2. The working machine according to claim 1, characterized in that: The striking part has an elongated main body and a plurality of rack parts arranged on one side of the main body. The plurality of rack parts are arranged in a row along the length direction of the main body part. The recessed portion is provided between the main body portion and the rack portion, and extends along an arrangement direction of the plurality of rack portions.

3. The working machine according to claim 1, characterized in that: The height of the convex portion is not less than 5% and not more than 80% of the thickness of the striking portion.

4. The working machine according to claim 1, characterized in that: The stopper has a first leg and a second leg that are parallel to each other, and a head connecting one end of the first leg and one end of the second leg. The convex portion is located on the side of the first leg portion of the stopper supplied to the injection path.

5. The working machine according to claim 1, characterized in that: The striking part reciprocates between the bottom dead center at the end of the first direction side of the moving stroke and the top dead center at the end of the second direction side of the moving stroke. The convex portion enters the concave portion when the striking portion is located at the bottom dead center. The convex portion does not enter the concave portion when the striking portion is located at the top dead center.

6. The working machine according to claim 5, characterized in that: When the striking part is located at the bottom dead center, the convex part enters the concave part to the middle of the length direction of the concave part.

Images