Working machine

Abstract

The present invention achieves a work machine that further improves the accuracy of driving a fastener. A driver 1A includes: a driver blade that drives a fastener into a hit surface by hitting the fastener; a blade guide 30 that forms an ejection path through which the fastener hit by the driver blade passes; and a probe 60 that is movable in the vertical direction, comes into contact with the fastener ejected from the ejection path, and guides the fastener. The blade guide 30 comprises a restriction part 35 that, when the probe 60 moves upward in a state in which the direction of hitting the fastener is inclined at a predetermined angle or larger with respect to the hit surface, restricts the amount of upward movement of the probe 60 to prevent the probe 60 from reaching a predetermined position.

Description

Technical Field

[0001] The present invention relates to a working machine, and particularly to a working machine suitable for driving work for driving a fastener into a mating member.

Background Art

[0002] Today, various working machines have been developed and put into practical use. The work performed using the working machine covers a wide range, and one of them is driving work. Furthermore, one of the driving works performed using the working machine is fitting fixing work. In the fitting fixing work, the fitting is fixed to the mating member by driving a fastener into a hole provided in the fitting placed on the mating member using a working machine.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the working machine performs driving work in a tilted state with respect to a mating member or the like, driving failure may occur. For example, in the fitting fixing work as described above, if the working machine is tilted with respect to the fitting, the fastener may come off from the hole of the fitting, and the fitting may not be fixed properly.

[0005] An object of the present invention is to provide a working machine with further improved driving accuracy of a fastener.

Means for Solving the Problems

[0006] The working machine of the present invention includes a striking part that strikes a stopper in a first direction and drives it into a driving surface, an injection part that forms an injection path through which the stopper struck by the striking part passes, and a contact member that is movable in the first direction and a second direction opposite to the first direction with respect to the injection part and contacts the stopper ejected from the injection path to guide the stopper. The striking part is allowed to strike the stopper when the contact member moving in the second direction reaches a predetermined position. The contact member is movable at least between the predetermined position and a protruding position that is spaced apart from the predetermined position in the first direction and protrudes from the injection part. The injection part includes a restricting part that restricts the amount of movement of the contact member in the second direction so that the contact member does not reach the predetermined position when the contact member moves in the second direction while the first direction is inclined at a predetermined angle or more with respect to the driving surface.

Advantages of the Invention

[0007] According to the present invention, a working machine with further improved driving accuracy of the stopper is realized.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Embodiments for Carrying Out the Invention

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing the appearance of a working machine according to this embodiment. FIG. 2 is a longitudinal sectional view showing the structure of the working machine according to this embodiment. The working machine shown in FIGS. 1 and 2 is a driving machine suitable for driving a fastener such as a nail into a mating material such as a plate material or a gypsum board.

[0010] As shown in FIG. 1, the driving machine 1A has a cylinder case 2, a motor case 4, and a handle 6. One end sides of the motor case 4 and the handle 6 are connected to the cylinder case 2, and the other end sides of the motor case 4 and the handle 6 are connected to a connecting portion 8. In other words, one end sides of the motor case 4 and the handle 6 are connected to each other via the cylinder case 2, and the other end sides of the motor case 4 and the handle 6 are connected to each other via the connecting portion 8. That is, the cylinder case 2, the motor case 4, the handle 6, and the connecting portion 8 are integrated. Therefore, in the following description, the cylinder case 2, the motor case 4, the handle 6, and the connecting portion 8 may be collectively referred to as the "housing 10".

[0011] The housing 10 is composed of two housing members formed of a synthetic resin such as nylon or polycarbonate. Specifically, the housing 10 including the cylinder case 2, the motor case 4, the handle 6, and the connecting portion 8 is formed by two housing members that are butted against each other.

[0012] Here, the longitudinal direction of the cylinder case 2 is defined as the "vertical direction", and the longitudinal direction of the motor case 4 is defined as the "front-rear direction". Also, the direction orthogonal to the vertical direction and the front-rear direction is defined as the "left-right direction". However, such definitions are merely for convenience of explanation.

[0013] According to the above definitions, the motor case 4 is located below the handle 6 and extends rearward from the cylinder case 2. On the other hand, the handle 6 is located above the motor case 4 and extends obliquely upward rearward from the cylinder case 2.

[0014] As shown in FIG. 2, the cylinder 20 is accommodated in the cylinder case 2, and the piston 21 is accommodated in the cylinder 20. The piston 21 accommodated in the cylinder 20 reciprocates in the axial direction (vertical direction) of the cylinder 20 inside the cylinder 20. Inside the cylinder 20, a piston upper chamber 22 is formed by the inner peripheral surface of the cylinder 20 and the upper surface of the piston 21. The volume of the piston upper chamber 22 increases and decreases as the piston 21 reciprocates (moves up and down). Specifically, the volume of the piston upper chamber 22 is minimized when the piston 21 is at the top dead center and maximized when the piston 21 is at the bottom dead center. Note that the piston 21 shown in FIG. 2 is at the bottom dead center.

[0015] A driver blade 23 is connected to the lower surface of the piston 21. The driver blade 23 is integrated with the piston 21 and reciprocates (moves up and down) together with the piston 21. The driver blade 23 strikes a stopper by colliding with the stopper while moving downward. That is, the driver blade 23 corresponds to the striking portion of the present invention. Also, the downward direction in the present embodiment coincides with the striking direction of the stopper by the driver blade 23 and corresponds to the first direction of the present invention. Then, the upward direction, which is the direction opposite to the downward direction in the present embodiment, corresponds to the second direction of the present invention.

[0016] A damper 24 made of rubber or urethane is provided at the bottom of the cylinder 20. The damper 24 receives the piston 21 that has reached the bottom dead center and prevents the piston 21 from colliding with the cylinder 20. The driver blade 23 extending downward from the piston 21 penetrates the damper 24 and the cylinder 20 and protrudes downward from the cylinder 20.

[0017] In the present embodiment, the separately formed piston 21 and driver blade 23 are connected and integrated, but the piston 21 and driver blade 23 may be integrally formed.

[0018] As shown in FIGS. 1 and 2, a magazine 12 is attached to the side portion of the housing 10. On the other hand, a shooting path 31 described later is provided below the cylinder case 2. The magazine 12 can accommodate a plurality of stoppers and is provided with a supply mechanism for supplying the plurality of accommodated stoppers to the shooting path 31 one by one.

[0019] Figs. 3 and 4 are longitudinal sectional views (vertical sectional views) showing the structure of the ejection path 31 and its vicinity. Fig. 5 is a cross-sectional view (horizontal sectional view) taken along line A-A in Fig. 3. As shown in these drawings, the ejection path 31 is formed by a plurality of members (ejection path forming members) including a first blade guide 30 extending downward from the cylinder case 2. The ejection path forming members include, in addition to the first blade guide 30, a second blade guide provided in the magazine 12 and paired with the first blade guide 30, and a nose disposed above the first blade guide 30 and the second blade guide.

[0020] The driver blade 23 shown in Fig. 2 strikes a stopper fed into the ejection path 31 formed by the ejection path forming members including the first blade guide 30. More specifically, the driver blade 23 strikes the head of the stopper fed into the ejection path 31 shown in Fig. 3 and the like. The stopper struck by the driver blade 23 passes through the ejection path 31 and is ejected from the ejection path 31. The first blade guide 30, which is a member forming the ejection path 31, corresponds to the ejection portion of the present invention. In the following description, the first blade guide 30 may be abbreviated as the "blade guide 30".

[0021] A pin wheel 25 is provided for moving the piston 21 shown in Fig. 2 from the bottom dead center side toward the top dead center side. The pin wheel 25 is fixed to a drive shaft 14 that is rotationally driven by a motor 13. A plurality of pins 25a are provided at predetermined intervals along the circumferential direction (rotation direction) of the pin wheel 25. On the other hand, a plurality of racks are provided at predetermined intervals along the axial direction (vertical direction) of the driver blade 23.

[0022] The rotational driving force output from the motor 13 housed in the motor case 4 is transmitted to the drive shaft 14 to which the pin wheel 25 is attached via a planetary gear type reduction mechanism 15. The motor 13 is a brushless electric motor that operates by electric power supplied from a battery 16 mounted on the rear part of the housing 10 (the back surface of the connecting part 8). The connecting part 8 houses a controller 17 as a control unit. The controller 17 is a microcomputer composed of a CPU, ROM, RAM, etc., and controls the start / stop, rotation amount, rotation speed, etc. of the motor 13 according to predetermined conditions.

[0023] Above the cylinder 20, a chamber 26a forming a pressure accumulation chamber 26 is provided. The pressure accumulation chamber 26 communicates with the piston upper chamber 22. In the present embodiment, the diameter of the chamber 26a is larger than the diameter of the cylinder 20. In the present embodiment where the chamber 26a has a larger diameter than the cylinder 20, the required volume of the pressure accumulation chamber 26 is ensured while keeping the overall height of the driving machine 1A including the cylinder 20 and the chamber 26a low.

[0024] The piston upper chamber 22 and the pressure accumulation chamber 26 are filled with high-pressure gas (compressed air in the present embodiment). When moving the piston 21 from the bottom dead center side toward the top dead center side (when raising the piston 21), the motor 13 rotates forward under the control of the controller 17. When the motor 13 rotates forward, the pin wheel 25 rotates in a predetermined direction. Here, it is assumed that when the motor 13 rotates forward, the pin wheel 25 rotates counterclockwise when viewed from the front.

[0025] When the pin wheel 25 starts to rotate counterclockwise, a plurality of pins 25a provided on the pin wheel 25 sequentially engage with a plurality of racks provided on the driver blade 23. Then, when the pin wheel 25 rotates until the pin 25a on the most downstream side in the rotation direction also engages with the lowermost rack in the vertical direction, the piston 21 is pushed up to the top dead center.

[0026] In the process of pushing up the piston 21 as described above, the compressed air in the upper chamber 22 of the piston is sent into the accumulator chamber 26 and further compressed. Then, when the pin wheel 25 rotates further, the engagement between the pin 25a provided on the pin wheel 25 and the rack provided on the driver blade 23 is released. Then, due to the pressure (air pressure) of the compressed air in the upper chamber 22 of the piston and the accumulator chamber 26, the piston 21 moves from the top dead center toward the bottom dead center, and the driver blade 23 moves downward. That is, the piston 21 and the driver blade 23 descend.

[0027] Refer to FIG. 6. FIG. 6 is a perspective view showing the blade guide 30 and its vicinity. The driving machine 1A is provided with a push lever 40 that can move downward (first direction) and upward (second direction) with respect to the blade guide 30. Viewed from another perspective, the push lever 40 is held by the blade guide 30 or the like so as to be vertically movable.

[0028] FIG. 7 is an exploded view of the push lever 40. The push lever 40 is composed of a push lever main body 50 and a probe 60 provided at the lower end of the push lever main body 50. In the following description, the push lever main body 50 may be abbreviated as the "lever main body 50".

[0029] As shown in FIGS. 5 and 6, guide grooves 32 are formed on each of the two opposing inner surfaces of the blade guide 30. On the other hand, guide protrusions 51 are formed on each of the two outer surfaces of the lever main body 50. The lever main body 50 is disposed inside the blade guide 30 (between the two opposing inner surfaces). Further, the guide protrusions 51 formed on the outer surface of the lever main body 50 are fitted into the guide grooves 32 formed on the inner surface of the blade guide 30. As a result, the push lever 40 (the lever main body 50 and the probe 60) can move vertically with respect to the blade guide 30.

[0030] As shown in FIG. 7, both ends of a connecting pin 61 that penetrates the probe 60 left and right are fitted into connecting holes 52 provided at the lower ends of the lever main body 50. As a result, the probe 60 can move up and down integrally with the lever main body 50 and can rotate within a predetermined range with respect to the lever main body 50 using the connecting pin 61 as a rotation axis.

[0031] A probe 60, which is part of the push lever 40, abuts against a stopper ejected from an ejection path 31 formed by a blade guide 30 or the like and guides the stopper. As shown in FIGS. 3, 4, and 5, the probe 60 is disposed on one side (front side) of the ejection path 31. On the other hand, a nail guide 70 is disposed on the other side (rear side) of the ejection path 31. That is, the probe 60 and the nail guide 70 face each other with the ejection path 31 therebetween. The stopper struck by the driver blade 23 (FIG. 2) is ejected through between the probe 60 and the nail guide 70. At this time, the stopper abuts against the probe 60 and the nail guide 70 and is guided by them. Usually, the stopper abuts against the nail guide 70 and then against the probe 60. The front side of the nail guide 70 (the side facing the probe 60) is recessed so as to form a concave groove 71 whose width gradually narrows toward the tip (lower end). On the other hand, the back side of the probe 60 (the side facing the nail guide 70) is recessed so as to form a concave groove 62 whose width gradually narrows toward the tip (lower end). The stopper is guided toward the probe 60 by the concave groove 71 of the nail guide 70. Thereafter, the stopper abuts against the concave groove 62 of the probe 60 and is ejected along the concave groove 62. In other words, the probe 60 abuts against a stopper ejected from the ejection path 31 and guides the stopper. That is, the probe 60 corresponds to the abutting member of the present invention.

[0032] Incidentally, the stopper may abut against the nail guide 70 after abutting against the probe 60. Also, the stopper that has abutted against the probe 60 may abut against the nail guide 70 and then abut against the probe 60 again. However, the stopper abuts against the probe 60 at least once and is guided by the probe 60.

[0033] The probe 60, which is part of the push lever 40 movable vertically with respect to the blade guide 30, is movable between a predetermined position and a protruding position spaced downward from the predetermined position. Here, the probe 60 shown in FIG. 3 is in the protruding position, and the probe 60 shown in FIG. 4 is in the predetermined position.

[0034] The push lever 40 including the probe 60 is always biased downward by a coil spring 41 (FIGS. 6 and 7). That is, the push lever 40 including the probe 60 is pushed downward toward a protruding position lower than the predetermined position by the biasing of the coil spring 41. On the other hand, when the probe 60 of the push lever 40 including the probe 60 is pressed against a driving surface or a contact surface parallel to the driving surface, the push lever 40 including the probe 60 moves upward against the biasing of the coil spring 41. That is, when the probe 60 of the push lever 40 including the probe 60 is pressed against a driving surface or the like, the push lever 40 including the probe 60 is pushed upward to a predetermined position higher than the protruding position against the biasing of the coil spring 41. Therefore, in the following description, the protruding position (the position of the probe 60 shown in FIG. 3) may be referred to as the "pushed-down position", and the predetermined position (the position of the probe 60 shown in FIG. 4) may be referred to as the "pushed-up position".

[0035] As shown in FIG. 3, when at least the probe 60 is in the pushed-down position, the tip of the probe 60 protrudes from the lower end of the blade guide 30. In the present embodiment, as shown in FIG. 4, when the probe 60 is in the pushed-up position, the tip of the probe 60 also slightly protrudes from the lower end of the blade guide 30.

[0036] Note that the probe 60 only needs to be movable at least between the pushed-up position and the pushed-down position. That is, the probe 60 may be movable downward from the position shown in FIG. 3, or may be movable upward from the position shown in FIG. 4.

[0037] However, the driver blade 23 shown in FIG. 2 is allowed to strike the stopper when the probe 60 reaches the pushed-up position. In other words, the driver blade 23 is not allowed to strike the stopper until the probe 60 moving upward reaches the pushed-up position. That is, the probe 60 reaching the pushed-up position is one of the conditions for the driver blade 23 to perform the driving operation. Therefore, the driving machine 1A includes a detection unit 42 that detects that the probe 60 has reached the pushed-up position.

[0038] The detection unit 42 in the present embodiment is composed of a magnet 43 attached to the push lever 40 and a magnetic sensor (Hall element 44) that detects a change in the magnetic field accompanying the movement of the magnet 43. FIG. 8 is an explanatory diagram showing the positional relationship between the magnet 43 and the Hall element 44 when the probe 60 is in the pushed-down position. FIG. 9 is an explanatory diagram showing the positional relationship between the magnet 43 and the Hall element 44 when the probe 60 is in the pushed-up position.

[0039] The detection result (output of the Hall element 44) of the detection unit 42 shown in FIGS. 8 and 9 is input to the controller 17 shown in FIG. 2. The controller 17 controls the motor 13 based on the change in the output of the Hall element 44. For example, as the push lever 40 shown in FIG. 8 rises and the magnet 43 shown in the same figure moves to the position shown in FIG. 9 (when approaching the Hall element 44), the output voltage of the Hall element 44 increases. In this case, when the value of the input voltage exceeds the threshold, the controller 17 determines that the probe 60 has reached the pushed-up position (determines that the probe 60 has risen to the pushed-up position) and operates the motor 13. In other words, while the value of the input voltage is below the threshold, the controller 17 determines that the probe 60 has not reached the pushed-up position (determines that the probe 60 has not risen to the pushed-up position) and does not operate the motor 13.

[0040] Alternatively, as the push lever 40 shown in FIG. 8 rises, when the magnet 43 shown in the same figure moves to the position shown in FIG. 9 (when approaching the Hall element 44), the output of the Hall element 44 is inverted. In this case, when the output of the Hall element 44 is inverted, the controller 17 determines that the probe 60 has reached the predetermined position (determines that the probe 60 has risen to the push-up position), and activates the motor 13. In other words, until the output of the Hall element 44 is inverted, the controller 17 determines that the probe 60 has not reached the predetermined position (determines that the probe 60 has not risen to the push-up position) and does not activate the motor 13.

[0041] As described above, when the upward movement amount (rise amount) of the probe 60 exceeds a predetermined amount and the probe 60 reaches the predetermined position (push-up position), the impact of the stopper by the driver blade 23 is allowed. That is, when other conditions are satisfied, the driving operation is executed. In other words, if the upward movement amount (rise amount) of the probe 60 does not exceed the predetermined amount and the probe 60 has not reached the predetermined position (push-up position), the impact of the stopper by the driver blade 23 is not allowed. That is, even if other conditions are satisfied, the driving operation is not executed.

[0042] As shown in FIGS. 6, 8, and 9, the blade guide 30 includes a restricting portion 35 that restricts the upward movement amount (rise amount) of the probe 60. The restricting portion 35 is provided around the probe 60, and when the probe 60 moves upward (second direction) in a state where the impact direction (first direction) of the stopper by the driver blade 23 is inclined at a predetermined angle or more with respect to the driving surface, the restricting portion 35 restricts the upward movement amount of the probe 60 so that the probe 60 does not reach the push-up position.

[0043] Hereinafter, the details of the restricting portion 35 provided in the blade guide 30 will be described. The restricting portion 35 is formed by a part of the blade guide 30. Specifically, the restricting portion 35 is formed by the lower end portion of the blade guide 30 and protrudes outside (around) the probe 60.

[0044] As shown in FIG. 6, the restricting portion 35 is provided on both sides of the probe 60 and includes a right restricting portion 35R and a left restricting portion 35L that face each other with the probe 60 therebetween. Further, the longitudinal dimensions of each of the right restricting portion 35R and the left restricting portion 35L are larger than the longitudinal dimension of the probe 60 in the same direction. That is, the right restricting portion 35R is provided on the right side of the probe 60, and the right restricting portion 35R protrudes forward and backward of the probe 60. Also, the left restricting portion 35L is provided on the left side of the probe 60, and the left restricting portion 35L protrudes forward and backward of the probe 60. As a result, the restricting portion 35 protrudes around the probe 60 in the front, rear, left, and right directions as a whole.

[0045] Next, the function of the restricting portion 35 will be described taking the fitting fixing operation as an example. In the fitting fixing operation taken here, a fitting placed on a mating member is fixed to the mating member by a stopper. More specifically, a stopper (nail) is driven into the mating member through a hole provided in the fitting to fix the fitting to the mating member. Therefore, one surface (upper surface) of the mating member into which the stopper is driven through the hole of the fitting corresponds to the driving surface of the present invention. Also, one surface (upper surface) of the fitting placed on the mating member is parallel to the upper surface of the mating member and corresponds to the abutting surface of the present invention. Note that the upper surface of the fitting corresponds to the abutting surface of the present invention as long as it is substantially parallel to the upper surface of the mating member corresponding to the driving surface.

[0046] Refer to FIG. 10. The fitting 100 shown in FIG. 10 is placed on the upper surface (driving surface 110a) of the mating member 110. Also, the driving machine 1A shown in FIG. 10 is not inclined with respect to the driving surface 110a. That is, the striking direction of the stopper is not inclined with respect to the driving surface 110a. Further, the tip of the probe 60 is inserted straight into the hole 101 of the fitting 100.

[0047] When the operator presses the driving machine 1A toward the workpiece 110, the tip of the probe 60 is pressed against the driving surface 110a inside the hole 101. Then, the push lever 40 including the probe 60 moves upward, and the probe 60 reaches the pushed-up position. Viewed another way, the blade guide 30 including the restricting portion 35 moves downward, and the restricting portion 35 approaches the upper surface (contact surface 100a) of the fitting 100.

[0048] However, even if the push lever 40 rises until the probe 60 reaches the pushed-up position, the restricting portion 35 does not contact the contact surface 100a. Viewed another way, the probe 60 rises to the pushed-up position before the restricting portion 35 contacts the contact surface 100a.

[0049] That is, when the striking direction of the stopper is not inclined with respect to the driving surface 110a, the restricting portion 35 does not prevent the probe 60 from reaching the pushed-up position. In other words, the restricting portion 35 does not limit the upward movement amount of the probe 60.

[0050] As described above, when the probe 60 reaches the pushed-up position, the striking of the stopper by the driver blade 23 is permitted. Therefore, when other conditions (for example, the operation of the trigger lever) are satisfied, the motor 13 operates under the control of the controller 17, and the driving operation is executed.

[0051] Next, refer to FIG. 11. The fitting 100 shown in FIG. 11 is placed on the upper surface (driving surface 110a) of the mating member 110, just like the fitting 100 shown in FIG. 10. On the other hand, the driving machine 1A shown in FIG. 11 is inclined with respect to the driving surface 110a, different from the driving machine 1A shown in FIG. 10. Specifically, the driving machine 1A shown in FIG. 11 is inclined forward by a first predetermined angle (θ1) or more as viewed from the operator (tilted forward). That is, the striking direction of the stopper is inclined forward by a first predetermined angle (θ1) or more as viewed from the operator (tilted forward). Furthermore, as the driving machine 1A tilts forward, the probe 60 also tilts forward. As a result, the tip of the probe 60 is not correctly inserted into the hole 101 of the fitting 100 and is in contact with the upper surface (contact surface 100a) of the fitting 100.

[0052] When the operator presses the driving machine 1A toward the mating member 110, the tip of the probe 60 is pressed against the contact surface 100a. Then, the push lever 40 including the probe 60 moves upward. Viewed another way, the blade guide 30 including the restricting portion 35 moves downward, and the restricting portion 35 approaches the contact surface 100a.

[0053] However, when the striking direction of the stopper is tilted forward by a first predetermined angle (θ1) or more with respect to the driving surface 110a, before the push lever 40 rises until the probe 60 reaches the pushed-up position, the restricting portion 35, which is a part of the blade guide 30, contacts the contact surface 100a. Then, further rising of the push lever 40 including the probe 60 is blocked.

[0054] That is, when the striking direction of the stopper is tilted forward by a first predetermined angle (θ1) or more with respect to the driving surface 110a or the contact surface 100a, the restricting portion 35 restricts the upward movement amount of the probe 60 so that the probe 60 does not reach the pushed-up position. Incidentally, the first predetermined angle (θ1) in the present embodiment is 15 degrees. Therefore, when the striking direction of the stopper is tilted forward by 15 degrees or more with respect to the driving surface 110a or the like, the restricting portion 35 prevents the probe 60 from reaching the pushed-up position.

[0055] As described above, if the probe 60 does not reach the pushed-up position, the striking of the stopper by the driver blade 23 is not allowed. Therefore, regardless of whether other conditions (e.g., the operation of the trigger lever) are satisfied or not, the driving operation is not executed. Thus, the occurrence of problems such as the stopper coming off from the hole 101 of the fitting 100 is prevented in advance.

[0056] Next, refer to FIGS. 12 and 13. The fitting 100 shown in FIGS. 12 and 13 is placed on the upper surface (driving surface 110a) of the mating member 110, just like the fitting 100 shown in FIG. 10. On the other hand, the driving machine 1A shown in FIGS. 12 and 13 is inclined with respect to the driving surface 110a, unlike the driving machine 1A shown in FIG. 10.

[0057] Specifically, the driving machine 1A shown in FIG. 12 is inclined by a second predetermined angle (θ2) or more to the right as viewed from the operator (right-inclined). That is, the striking direction of the stopper is inclined by a second predetermined angle (θ2) or more to the right as viewed from the operator (right-inclined).

[0058] On the other hand, the driving machine 1A shown in FIG. 13 is inclined by a second predetermined angle (θ2) or more to the left as viewed from the operator (left-inclined). That is, the striking direction of the stopper is inclined by a second predetermined angle (θ2) or more to the left as viewed from the operator (left-inclined).

[0059] Note that FIGS. 12 and 13 are partial front views of the driving machine 1A. Therefore, the direction of inclination of the driving machine 1A as viewed from the operator is opposite to the direction of inclination of the driving machine 1A shown in the figures. For example, the driving machine 1A shown in FIG. 12 is inclined to the left on the paper surface, but is inclined to the right as viewed from the operator.

[0060] The probe 60 shown in FIGS. 12 and 13 is inclined along with the inclination of the driving machine 1A. As a result, the tip of the probe 60 is not correctly inserted into the hole 101 of the fitting 100 and is in contact with the upper surface (contact surface 100a) of the fitting 100.

[0061] When the operator presses the driver 1A toward the workpiece 110, the tip of the probe 60 is pressed against the contact surface 100a. Then, the push lever 40 including the probe 60 moves upward. Viewed another way, the blade guide 30 including the restricting portion 35 moves downward, and the restricting portion 35 approaches the contact surface 100a.

[0062] Here, if the striking direction of the stopper is inclined to the right or left by a second predetermined angle (θ2) or more with respect to the driving surface 110a, before the push lever 40 rises until the probe 60 reaches the pushed-up position, the restricting portion 35, which is a part of the blade guide 30, contacts the contact surface 100a. Then, further rising of the push lever 40 including the probe 60 is blocked.

[0063] That is, when the striking direction of the stopper is inclined to the right or left by a second predetermined angle (θ2) or more with respect to the driving surface 110a or the contact surface 100a, the restricting portion 35 restricts the upward movement amount of the probe 60 so that the probe 60 does not reach the pushed-up position. Incidentally, the second predetermined angle (θ2) in the present embodiment is 25 degrees. Therefore, when the striking direction of the stopper is inclined to the right or left by 25 degrees or more with respect to the driving surface 110a or the like, the restricting portion 35 prevents the probe 60 from reaching the pushed-up position.

[0064] As described above, if the probe 60 does not reach the pushed-up position, the striking of the stopper by the driver blade 23 is not allowed. Therefore, regardless of whether other conditions (for example, the operation of the trigger lever) are satisfied, the driving operation is not executed. Accordingly, the occurrence of problems such as the stopper coming off from the hole 101 of the fitting 100 is prevented in advance.

[0065] Next, refer to FIG. 14. The fitting 100 shown in FIG. 14 is placed on the upper surface (driving surface 110a) of the mating member 110, just like the fitting 100 shown in FIG. 10. On the other hand, the driving machine 1A shown in FIG. 14 is inclined with respect to the driving surface 110a, different from the driving machine 1A shown in FIG. 10. Specifically, the driving machine 1A shown in FIG. 14 is inclined backward by a third predetermined angle (θ3) or more as viewed from the operator (tilted backward). That is, the striking direction of the stopper is inclined backward by a third predetermined angle (θ3) or more as viewed from the operator (tilted backward).

[0066] When the striking direction of the stopper is tilted backward by a third predetermined angle (θ3) or more with respect to the driving surface 110a or the contact surface 100a, the front end of the probe 60 reaches the lower surface front end 12a of the magazine 12 before reaching the hole 101 of the fitting 100 or the upper surface (contact surface 100a) of the fitting 100. As a result, the front end of the probe 60 is not inserted into the hole 101 of the fitting 100 and does not contact the contact surface 100a either.

[0067] Therefore, even if the operator presses the driving machine 1A toward the mating member 110, the front end of the probe 60 cannot be pressed against either the driving surface 110a or the contact surface 100a. Thus, the push lever 40 does not move upward, and the probe 60 does not reach the pushed-up position.

[0068] Incidentally, the third predetermined angle (θ3) in the present embodiment is 15 degrees. Therefore, when the striking direction of the stopper is tilted backward by 15 degrees or more with respect to the driving surface 110a or the like, the reaching of the probe 60 to the pushed-up position is blocked by the lower surface front end 12a of the magazine 12. That is, when the driving machine 1A is tilted backward with respect to the driving surface 110a, the magazine 12 functions as the second regulating portion.

[0069] As described above, when the striking direction of the stopper by the driver blade 23 is tilted forward, rightward or leftward by a predetermined angle or more with respect to the driving surface 110a, the upward movement amount of the probe 60 is restricted by the first restricting portion (restricting portion 35), and the probe 60 is prevented from reaching the pushing-up position. Further, when the striking direction of the stopper by the driver blade 23 is tilted backward by a predetermined angle or more with respect to the driving surface 110a, the upward movement of the probe 60 is restricted by the second restricting portion (magazine 12), and the probe 60 is prevented from reaching the pushing-up position. That is, when the striking direction of the stopper by the driver blade 23 is tilted by a predetermined angle or more with respect to the driving surface 110a, the probe 60 does not reach the pushing-up position, and thus the driving operation is not executed.

[0070] Incidentally, there is also an embodiment in which the upward movement amount of the probe 60 is restricted by the blade guide 30 (restricting portion 35) even when the striking direction of the stopper is tilted backward by a predetermined angle or more with respect to the driving surface 110a. Such an embodiment is realized, for example, by expanding the protrusion of the lower end portion of the blade guide forming the restricting portion 35 rearward of the probe.

[0071] FIG. 15(a) is an enlarged view of the probe 60 of the present embodiment. FIG. 15(b) is an enlarged view of the probe 60 of the present embodiment tilted laterally by (α) degrees. On the other hand, FIG. 16(a) is an enlarged view of the conventional probe 160. Further, FIG. 16(b) is an enlarged view of the probe 160 tilted laterally by (α) degrees.

[0072] As shown in Fig. 15(a), the tip surface 65 of the probe 60 of the present embodiment is generally circular (spherical) as a whole. Further, the side surface 66 and the tip surface 65 of the probe 60 are formed in series via a tapered surface 67. In other words, a tapered surface 67 is interposed between the side surface 66 and the tip surface 65 of the probe 60. One end side (upper side) of the tapered surface 67 is connected to the side surface 66, and the other end side (lower side) of the tapered surface 67 is connected to the tip surface 65. And the boundary portion between the tapered surface 67 and the tip surface 65 is slightly constricted. In other words, a constriction 68 is formed at the boundary portion between the tapered surface 67 and the tip surface 65. Therefore, the tangent line of the tip surface 65 does not include a straight line parallel to the tapered surface 67.

[0073] As shown in Fig. 16(a), the conventional probe 160 is common to the probe 60 of the present embodiment in that the tip surface 165 is generally circular (spherical) as a whole. On the other hand, the probe 160 is different from the probe 60 in that the constriction 68 is not provided. As a result, the tangent line of the tip surface 165 includes a straight line parallel to the tapered surface 167.

[0074] Compare Fig. 15(b) with Fig. 16(b). When the probes 60 and 160 are inclined in the same direction and at the same angle, the amount of deviation (t1) of the center of the probe 60 with respect to the center of the hole 101 of the fitting 100 is smaller than the amount of deviation (t2) of the center of the probe 160. Therefore, when the probe 60 is inclined with respect to the fitting 100, it is less likely to deviate from the hole 101 than the probe 160. The difference in the amount of deviation (t1, t2) that exhibits such an effect is mainly due to the presence or absence of the constriction 68.

[0075] The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof. For example, the driving machine 1A according to the above-described embodiment is an electric driving machine including a motor 13. However, the present invention is also applicable to working machines other than electric working machines. For example, the present invention is applicable to a pneumatic driving machine. In one aspect of the pneumatic driving machine to which the present invention is applied, a link mechanism interlocked with a push lever 40 is provided. When a probe 60, which is a part of the push lever 40, reaches a predetermined position, the link mechanism opens a valve in an air flow path between a compressed air supply source (for example, an air compressor) and a cylinder 20. Then, compressed air is supplied to the cylinder 20, and the piston 21 is moved downward by the pressure of the compressed air. On the other hand, when the probe 60 has not reached the predetermined position, the valve is not opened by the link mechanism.

[0076] In the above-described embodiment, the function of the restricting portion 35 has been described by taking the case where the driving machine 1A is inclined forward, backward, left, or right as an example. However, the restricting portion 35 functions in the same or substantially the same manner as described above even when the driving machine 1A is inclined in other directions. For example, the restricting portion 35 can restrict the amount of movement of the probe 60 even when the driving machine 1A is inclined obliquely forward by a predetermined angle or more. Further, each of the predetermined angles (θ1, θ2, θ3) can be changed as appropriate. However, it is preferable that each of the predetermined angles (θ1, θ2, θ3) is set in the range of 10 degrees or more and less than 30 degrees. The change of these angles can be made by changing the size, shape, etc. of the restricting portion 35.

Description of Reference Numerals

[0077] 1A... Driving machine, 2... Cylinder case, 4... Motor case, 6... Handle, 8... Connecting part, 10... Housing, 12... Magazine, 12a... Front end part of the lower surface, 13... Motor, 14... Drive shaft, 15... Reduction mechanism, 16... Battery, 17... Controller, 20... Cylinder, 21... Piston, 22... Upper chamber of the piston, 23... Driver blade, 24... Damper, 25... Pin wheel, 25a... Pin, 26... Accumulator chamber, 26a... Chamber, 30... First blade guide (blade guide), 31... Injection path, 32... Guide groove, 35... Regulation part, 35L... Left regulation part, 35R... Right regulation part, 40... Push lever, 41... Coil spring, 42... Detection part, 43... Magnet, 44... Hall element, 50... Push lever body (lever body), 51... Guide projection, 52... Connecting hole, 60, 160... Probe, 61... Connecting pin, 62... Concave groove, 65, 165... Tip surface, 66... Side surface, 67, 167... Tapered surface, 68... Constriction, 70... Nail guide, 71... Concave groove, 100... Metal fitting, 100a... Contact surface, 101... Hole, 110... Counterpart material, 110a... Driving surface

Claims

1. A housing having a handle, a striking portion that strikes a stopper in a first direction and drives it into a driving surface, an injection portion that forms an injection path through which the stopper struck by the striking portion passes, a contact member that is biased in the first direction with respect to the injection portion and is pressed against the driving surface or a contact surface parallel to the driving surface when an operator presses the housing toward a mating member, so that it is movable in a second direction opposite to the first direction with respect to the housing, and contacts the stopper ejected from the injection path to guide the stopper, a magazine attached to the injection portion so as to extend from the injection portion toward a third direction orthogonal to the first direction and the second direction, the striking portion is allowed to strike the stopper when the contact member moving in the second direction reaches a predetermined position, the contact member is movable at least between the predetermined position and a protruding position that is spaced apart from the predetermined position in the first direction and protrudes from the injection portion, the injection portion includes a restricting portion that restricts the amount of movement of the contact member in the second direction so that the contact member does not reach the predetermined position when the contact member is pressed against the driving surface or the contact surface, the restricting portion restricts the amount of movement of the contact member in the second direction in at least one of the front, rear, left, and right directions in a state where the first direction is inclined with respect to the driving surface or the contact surface by a predetermined angle or more, working machine.

2. The working machine according to claim 1, wherein the restricting portion contacts at least one of the driving surface and the contact surface before the contact member moving in the second direction reaches the predetermined position.

3. The working machine according to claim 2, wherein the restricting portion is provided around the contact member and protrudes outside the contact member.

4. The working machine according to claim 3, wherein the restricting portion protrudes in the front, rear, left, and right directions of the contact member.

5. The working machine according to any one of claims 2 to 4, wherein the restricting portion is provided on both sides of the contact member and includes a right restricting portion and a left restricting portion that face each other with the contact member interposed therebetween.

6. The working machine according to any one of claims 1 to 5, wherein the restricting portion is provided at an end portion of the injection portion on the side in the first direction.

7. having a push lever body movable in the first direction and the second direction with respect to the injection portion, The contact member is provided at an end portion on the side in the first direction of the push lever main body and moves integrally with the push lever main body, and the working machine according to any one of claims 1 to 6.

8. The working machine according to any one of claims 1 to 7, further comprising a detection unit that detects that the contact member moving in the second direction has reached the predetermined position.

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