JP2010058226A - Driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nail driving machine of pushless type, performing continuous driving of nails (fasteners) by moving a contact arm to the top dead center in the state in which the triggering operation is retained. <P>SOLUTION: A driving changeover lever 27 having an arc surface 29 is installed in such an arrangement as to restrict the rotation of a trigger arm 19 and the arc surface 29 is positioned confronting the trigger arm 19, whereby a free end 191 of the trigger arm 19 is contacted with the arc surface 29 of the changeover lever 27 while the contact arm 5 is depressed, which allows the top end 52 of the contact arm and the free end 191 of the trigger arm to be in the engaged condition at all times. This enables continuous nail driving motion. A single driving motion is performed when the plane 28 on the lever 27 is positioned confronting the trigger arm 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving machine for driving a stopper such as a nail, a hook, or a staple into a mounting member. The present invention relates to a driving machine that enables a single driving operation and a continuous driving operation.

  A compressed air system that uses compressed air by supplying compressed air from the air compressor to the driving machine body, a gas combustion system that mounts a small gas cylinder on the driving machine body and burns the gas stored in the cylinder, a storage battery, and an electric motor. Using a drive source (power source) such as an electric motor system that is mounted on the main body of the driving machine and uses the driving force of the electric motor, the connecting stoppers loaded in the magazine are sequentially connected from the tip of the driver guide. 2. Description of the Related Art Portable driving machines that are launched for each book are well known.

  In this type of driving machine, as disclosed in Patent Document 1 below, the contact arm is always biased to the top dead center in the initial state, and the attachment member contacts the contact arm at the tip of the injection portion. If not, even if a trigger pulling operation is performed, it is well known that a safety mechanism is provided that does not allow the hitting drive unit to be activated simply by moving the contact arm downward. According to this technique, when driving a stopper such as a nail, it is not necessary to strongly press the tip end portion of the contact arm against the mounting member, so that the finishing and workability of the mounting member are improved.

  For example, the method of attaching a mounting member such as a baseboard of a building interior or a finishing construction material such as a peripheral edge is obtained by attaching a finishing head with a small head diameter to a relatively wide width provided on the mounting member after the mounting member is bonded with an adhesive. It is common to drive by mounting in a narrow groove. In this case, the nail has the same color as the head of the nail according to the appearance color of the mounting member, and the tip of the contact arm does not leave any scratches or dents in the mounting member in the predetermined groove of the mounting member. There is a demand for a driving machine that does not need to strongly press the portion against the mounting member.

JP 2005-7547 A

  According to the so-called pushless type driving machine, it is not necessary to press the tip of the contact arm (push lever) strongly against the mounting member. Can be reduced. However, in a state where the trigger pulling operation is held, it is impossible to return the top arm to the top dead center by pressing the contact arm against the mounting member again. There was a disadvantage that it was not possible.

  That is, in the pushless type driving machine as disclosed in the above-mentioned Patent Document 1, the driving operation of the stopper is performed when the next stopper is continuously driven while the pulling operation of the trigger is held. However, when the tip of the contact arm leaves the contact with the mounting member, when the next stopper is driven, the trigger holding the pulling operation is released from the holding position to the initial position, and then the trigger is repeatedly There was the disadvantage that the pulling operation had to be started. For this reason, the conventional pushless type driving machine has a problem that the operability and work efficiency are lowered.

  Accordingly, one object of the present invention is to provide a pushless type driving machine that eliminates the above-mentioned drawbacks of the prior art and has improved operability and work efficiency.

  Another object of the present invention is a pushless type driving machine that enables a continuous driving operation of a stopper by operating a contact arm to the top dead center while maintaining a trigger pulling operation. Is to provide.

  In order to achieve the above object, the outline of a representative one of the inventions disclosed in the present application will be described as follows.

  According to one aspect of the present invention, a driver bit for striking a stopper loaded in an injection part, a striking driving means for reciprocating the driver bit and driving the stopper from the injection part, A trigger means that can be pulled and operated in a predetermined direction to control activation or stop of the impact driving means, a movable means that mechanically or electrically couples the trigger means and the impact drive means, and extends from one end to the other end. A contact arm that is disposed in the vicinity of the trigger means so that the one end is engaged in response to a pulling operation or a release operation of the trigger means, and the other end is disposed in the injection portion A contact arm supported so as to be movable in a direction parallel to the moving direction of the driver bit and urged toward the one end side by a pressing means. In a driving machine for turning on the movable means by turning on the movable means by the cooperation of the trigger means and starting the impact driving means, and driving the stopper and then opening the trigger means or the contact arm. , Further comprising driving switching means for switching the engagement state of the trigger means and the contact arm to a single driving mode or a continuous driving mode, and when the driving switching means selects the single driving mode, the trigger means or When the contact arm is opened, the contact arm and the trigger means are controlled to be disengaged, and when the driving switch means selects the continuous driving mode, the contact arm is opened when the trigger means or the contact arm is opened. And the trigger means are controlled so that they are always engaged.

  According to another feature of the invention, the driving switch means comprises a rotating shaft arranged to control the turning operation of the trigger means, and a switching lever connected to one end of the rotating shaft. The rotary shaft has a planar outer peripheral surface and an arc outer peripheral surface in cross-sectional shape, and the switching lever is switched to the single shot mode by causing the planar outer peripheral surface to face the trigger means, and the switching lever. By switching the outer peripheral surface of the arc surface to the trigger means, the mode is switched to the continuous driving mode.

  According to the present invention, after the nail (stopper) is driven, the trigger means or the contact arm is opened so that the movable means called the start switch or the trigger valve can be turned off. In the driving operation of the stopper, since it is not necessary to press the contact arm against the mounting member, it is possible to reduce unintentional damage to the mounting member due to the tip of the contact arm when the driving machine body is moved.

  Further, according to the present invention, by operating the driving switching means (switching lever), the upper end of the contact arm and the trigger means (trigger arm free end) are always engaged, and the trigger pulling operation is maintained. Since the continuous driving mode in which the nail can be driven continuously can be selected by pressing the tip of the contact arm against the mounting member, the operability and workability of the driving machine can be improved.

  The above and other objects, and the above and other features of the present invention will become more apparent from the following description of the present specification and the accompanying drawings.

  Hereinafter, an embodiment in which the present invention is applied to a nail driver using a compressed air drive source will be described with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof may be omitted. Moreover, although the following description regarding the driving machine of this invention showed the state which installed the direction in which a stopper is driven in the perpendicular direction, it is not limited to a special embodiment or intention. The present invention can also be applied to the case where the stopper is driven in the horizontal direction or other directions.

[Overall configuration of nailing machine]
FIG. 1 to FIG. 15 are structural views according to the operation state of the compressed air type nail driver according to the embodiment. In the nail driving machine according to the present invention, the contact arm (push lever) is always urged to the top dead center in the initial state, and the mounting member (working member) is in contact with the contact arm at the tip of the injection unit. If not, a safety mechanism is employed in which even if a trigger pulling operation is performed, the contact arm simply moves downward and the impact driving unit cannot be activated. The present invention is directed to a nail driver provided with a so-called pushless type safety device. In addition, according to the present invention, the driving switch lever for switching the driving operation mode is provided, and the single driving mode or the continuous driving mode can be switched.

  First, the overall configuration of the nail driving machine 1 in the initial state will be described with reference to FIGS. The nail driving machine 1 includes a housing 11 having a T-shaped planar shape, and the body housing portion 11 is equipped with a cylinder 21 and a piston 14 that reciprocates within the cylinder 21. A driver bit 18 for hitting the head of the nail 8 as a stopper is fixed to the piston 14. An injection portion 26 for hitting a nail which is a stopper by the driver bit 18 is installed at the lower end portion of the body housing portion 11.

  The magazine 2 is disposed substantially in parallel with the handle housing portion 15. A connecting nail 81 (see FIG. 8) connected in a strip shape is loaded in the magazine 2, and the connecting nail 81 is moved to the injection unit 26 side by a feeding member 13 (see FIG. 2) mounted in the magazine 2. It is pressed and separated into individual nails 8 by a driver bit 18 and is injected from a nose 25 to an attachment member (member to be processed).

  A trigger valve 23 that functions as an activation switch that controls the driving operation of the nail driving machine 1 is provided near the base of the handle housing portion 15. Further, in the vicinity of the trigger valve 23, a trigger 3 is provided that can be pulled with a finger of a hand that holds the handle housing portion 15. As will be described later, the trigger 3 is supported by the housing 11 so as to rotate about the rotation shaft 22 and engages the plunger 4 coupled to the trigger valve 23 according to the rotation angle. Further, an upper end portion 52 of the contact arm 5 that can reciprocate is disposed in the vicinity of the trigger 3. The tip 51 of the contact arm 5 forms a part of the injection path 7 (see FIG. 8), which is the outlet of the leading nail 8 of the feeding path 121 (see FIG. 7), and constitutes the injection section 26 Guided by the guide 12 (see FIG. 7) and supported by the bit guide 12 in a reciprocable manner.

  When the trigger 3 is pulled and operated in cooperation with the contact arm 5, the compressed air supplied through the air plug 15b is supplied to the trigger valve 23 and the head valve 20 attached to the upper portion of the nail driver 1 (see FIG. 1). ) Through the cylinder 21 in the nail driving machine 1 to drive the piston 14 from the top dead center to the bottom dead center. As a result, the driver bit 18 fixed to the piston 14 strikes the leading nail 8 supplied into the feeding path 121 (see FIG. 7) while being guided by the injection path 7 (see FIG. 8), and is connected. The nail 8 separated from the nail 81 (see FIG. 8) is driven into the mounting member 9 from the tip of the injection path 7 (see FIG. 8).

  A pressure accumulating chamber 15a (see FIG. 1) is formed inside the handle housing portion 15, and an air hose (see FIG. 1) is connected to the pressure accumulating chamber 15a via an air plug 15b provided at the rear end of the handle housing portion 15. 1 (not shown) is connected and compressed air is supplied. The compressed air supplied through the air plug 15 b is supplied into the cylinder 21 through the trigger valve 23 and the head valve 20 by the pulling operation of the trigger 3 to lower the piston 14. The trigger valve 23 is turned off by opening the trigger 3 or the contact arm 5 after driving the nail.

[Configuration of Trigger Unit 3 and Driving Switch Lever 27]
Here, the structure of the trigger 3 will be described with reference to FIGS. 3 to 6 and FIGS. 8 to 13. As described above, the trigger 3 is supported by the housing 11 so as to be able to be rotated about the rotation shaft 22. As shown in FIG. 3, the trigger 3 has a trigger arm 19 having an elongated hole 193 so that it can slide back and forth while being pivotally supported by a pivotal support 24 provided at one end of the trigger 3, and a rotating part 271. And a driving switch lever 27 composed of a rotating shaft 272.

  The trigger arm 19 is always pressed forward, that is, toward the rotating shaft 22 (for example, see FIG. 9) by the spring 66 and the spring mounting member 194 with the pivot portion 24 as a base, and as shown in FIG. Thus, the free end 191 of the trigger arm 19 is configured to engage with the contact arm upper end 52 and to engage with the tip of the plunger 4. Further, when the contact arm 5 is pushed down relative to the nail driver 1, the free end 191 of the trigger arm 19 and the contact arm upper end 52 are disengaged as shown in FIG. It is configured.

[Configuration of the drive switching lever 27]
The driving switch lever 27 (see FIG. 3) provided in accordance with the present invention is a changeover switch for switching the nail driving operation mode from the normal single driving mode to the continuous driving mode that enables continuous nail driving. is there. The driving switch lever 27 includes a rotating shaft 272 arranged to control the rotating operation of the trigger arm 19 and a rotating portion (switching lever portion) 271 connected to one end of the rotating shaft 272. The shaft 272 has a planar outer peripheral surface 28 and an arc outer peripheral surface 29 in cross-sectional shape, and the planar outer peripheral surface 28 is opposed to the trigger arm 19 by the switching lever portion 271 of the switching lever 27 as shown in FIG. Thus, the mode is switched to the “single driving mode”, and the switching lever portion 271 of the switching lever 27 is switched to the “sequential driving mode” by causing the arc surface outer peripheral surface 29 to face the trigger arm 19. As shown in FIG. 6, when the locking portion (locking convex portion) 31 of the switching lever portion 271 is set in the locking hole (locking concave portion) 30 a of the trigger portion 3, it operates as “single driving mode”. When it is set in the locking hole (locking recess) 30b of the trigger portion 3, it can operate as a “continuous driving mode”.

That is, by operating the switching lever portion 271 of the driving switching lever 27, the engagement angle between the contact arm upper end portion 52 and the trigger arm free end portion 191 is controlled by controlling the rotation angle of the trigger arm 19. . For example, by setting the driving switch lever 27 in the locking hole 30a, the rotating portion is arranged so that the planar outer peripheral surface 28 of the rotating shaft 272 faces the planar side of the trigger arm 19 as shown in FIGS. When 271 is set, the trigger arm free end 191 and the contact arm upper end 52 are disengaged in the middle of the lowering of the contact arm 5 with respect to the pulling operation of the trigger 3, and the contact arm is spring (pressing means) 6. (Refer to FIG. 7) and can return to the top dead center. Thereby, the “single shot mode” can be executed. (See FIGS. 12 and 13)
Conversely, by setting the driving switch lever 27 in the locking hole 30b, the arc surface outer peripheral surface 29 of the rotating shaft 272 faces the plane side of the trigger arm 19 as shown in FIGS. If the rotating part 271 is set, the trigger arm 19 is limited in rotation angle by the arc outer peripheral surface 29 of the driving switch lever 27 with respect to the pulling operation of the trigger 3, and the trigger arm free end part 191 and the contact arm upper end part 52 is always engaged. Accordingly, the nail 8 can be driven by pressing the tip 51 of the contact arm against the mounting member 9 in a state where the pulling operation of the trigger 3 is held (the state where the trigger 3 is held). "Mode" can be executed. (See FIGS. 10 and 11)
A plunger 4 supported so as to be vertically slidable is provided between the trigger valve 23 and the trigger arm 19, and when the plunger 4 is at the bottom dead center, the trigger valve 23 that functions as a piston activation switch is in an OFF state. Therefore, the nail driving machine 1 is turned off. On the contrary, in the process in which the plunger 4 moves from the bottom dead center to the top dead center, the trigger valve 23 functioning as an activation switch is turned on, so the driving operation of the nail driving machine 1 is started. As the operating principle of the reciprocating motion of the piston 14 by the vertical movement of the plunger 4, the same technique as that of a known compressed air type nail driving machine can be adopted.

[About Configuration of Injection Unit 26]
The nail supplied to the injection path 7 (see FIG. 8) is separated from a continuous nail 81 in which a large number of nails are connected to each other on the side surface via an adhesive. The connecting nail 81 is fed into the magashin 2 and fed to the front end side of the magazine 2 by a feeding member 13 (see FIGS. 2 and 8) pressed by a spring (not shown). At the front end of the magazine 2, a bit guide 12 (see FIG. 7) that is fixed to the nail driving machine 1 and extends downward is provided.

  The bit guide 12 (see FIG. 7) is formed in a substantially flat plate shape, and the bit guide 12 is provided with a feeding path 121 through which the connecting nail 81 in the magazine 2 passes, and below the feeding path 121 A foot receiving portion 122 that supports the tip of the foot of the nail 8 is provided. On the front surface of the bit guide 12, a guide convex portion 123 extending in parallel with the feeding path 121 is provided so as to protrude. The plurality of concavo-convex portions around the feeding path 121 allow the heads of the plurality of nails 8 having different lengths to pass therethrough so as to be driven. Such a bit guide structure is formed based on a known technique.

  As shown in FIG. 2 or FIG. 8, the contact arm 5 is slidable up and down on the bit guide 12 and a tip portion 51 having a substantially flat plate shape located near the feeding path 121 on the left front surface of the bit guide 12. And an upper end 52 extending to the vicinity of the trigger 3. The contact arm 5 is guided by being fitted to a guide convex portion 123 (see FIG. 7) formed so as to protrude from the bit guide 12, and two guide rods 54 (FIG. 7) are provided at the distal end portion 51 of the contact arm 5. Are provided so as to extend in a vertical direction in a substantially symmetrical manner. The contact arm 5 is supported by the bit guide 12 so as to be movable up and down by positioning the guide convex portion 123 of the bit guide 12 in the guide groove 55 (see FIG. 7) of the contact arm tip 51 and guiding the left and right. ing.

  The contact arm 5 is always pressed to the top dead center side by a pair of springs 6 (see FIG. 7) provided between the bit arm 12 and the contact arm 5. The pair of springs 6 are provided at substantially symmetrical positions with respect to the center line of the guide convex portion 123 and the guide groove 55 in order to eliminate the inclination when the contact arm 5 moves up and down and to make the vertical motion smooth. Yes. The load of the spring 6 is set smaller than the load pressed downward by the spring 61 of the plunger 4 (see FIG. 2).

  The feed path 121 on the front surface of the bit guide 12, the guide rod 54 of the contact arm tip 51, the guide groove 55, and the like are covered by the guide plate 10 (see FIG. 1). The guide plate 10 is mounted and fixed to the bit guide 12 by a pair of screws 16 (see FIG. 1) that are screwed into screw holes provided in the guide convex portion 123 of the bit guide 12. Thus, the contact arm 5 is sandwiched between the guide plate 10 and the bit guide 12, and the front and rear surfaces thereof are guided and supported so as to be slidable in the vertical direction.

  Since the pressing force by a spring (not shown) applied to the feeding member 13 via the connecting nail 81 is received by the guide plate 10 provided on the front surface of the feeding path 121 via the connecting nail 81, this pressing force is , It does not act on the contact arm 5. Therefore, the pressing force of the spring 6 that pushes up the contact arm 5 can be set small irrespective of the pressing force of the feeding member 13.

  A nose 25 (see FIG. 1) having a guide groove up to the lower end is fixed to the tip 51 of the contact arm 5 with a screw 17 so that the substantially flat driver bit 18 can move up and down. The nose 25 forms an injection path 7 together with the contact arm 5 and is slidable in the vertical direction integrally with the contact arm 5. The front end portion 51 of the contact arm 5 integrated with the nose 25 is tapered so as to become thinner as it goes downward, and the thickness of the lower end portion of the two is the groove of the mounting member (working member) 9. The thickness is within a range of 91 (see FIG. 8), for example, 3.5 mm.

[Operation of the driving machine 1]
Next, the nail driving operation by the nail driving machine 1 will be described. As described above, the driving machine 1 according to the present invention operates the driving switching lever 27 to the locking portion 30a or the locking portion 30b, thereby realizing two types of driving operations of the single driving mode or the continuous driving mode. Is.

(Operations when the drive switching lever 27 is set to the “single shot mode”)
First, a driving operation (single driving mode) in the case where the switching lever 27 is set in the locking portion 30a and the planar outer peripheral surface 28 of the rotating shaft 272 is opposed to the trigger arm 19 side will be described.

As shown in FIGS. 14 and 15, the tip 51 of the contact arm 5 is lightly applied to the surface of the groove 91 of the mounting member 9, and then the handle housing 15 is gripped to start the nail driver 1. When the trigger 3 is pulled by the finger of the hand, the trigger 3 is rotated toward the trigger valve 23 around the rotation shaft 22 by the pulling operation of the trigger 3. As a result, the pivotal support portion 24 of the trigger arm 19 moves upward, so that the central portion 192 of the trigger arm 19 comes into contact with the tip of the plunger 4 of the trigger valve 23. As a result, the distal end portion of the plunger 4 serves as a fulcrum, and the pivot portion 24 serves as a power point, and the free end 191 of the trigger arm 19 pushes down the contact arm upper end 52. However, as shown in FIG. 14, the contact arm tip 51 is in contact with the surface of the groove 91 of the mounting member 9, so that the contact arm 5 is not pushed down and the contact arm 5 is prevented from descending. Since the contact arm 5 does not move by preventing the lowering, the plunger 4 is pushed up by the central portion 192 of the trigger arm 19 in accordance with the pulling operation of the trigger 3, the trigger valve (start switch) 23 is turned ON, and the nail driver 1 Starts, and the leading nail 8 in the feed path 121 is driven out from the injection path 7 to the mounting member 9. (See FIGS. 14 and 15)
When the nail 8 is driven, the nail driving machine main body 1 is lifted and moved in the direction opposite to the mounting member 9, that is, upward in FIG. The plunger 4 always presses the free end 191 of the trigger arm 19 downward by the load of the spring 61. This load is based on the load of the spring 6 (see FIG. 7) that pushes the contact arm 5 to the top dead center. Therefore, the contact point of the plunger 4 with the trigger arm 19 serves as a power point, and the pivot portion 24 serves as a fulcrum, and the free end portion 191 of the trigger arm 19 pushes down the upper end portion 52 of the contact arm 5. As a result, the nail driving machine 1 moves away from the mounting member 9, but the tip 51 of the contact arm 5 moves downward relative to the nail driving machine 1 so as to always contact the surface of the mounting member 9. To do. (See FIGS. 14 and 15)
When the contact arm 5 is pushed down relative to the nail driving machine 1, the upper end 52 of the contact arm 5 and the free end 191 of the trigger arm 19 are disengaged in the middle of lowering. 5 is pressed by the spring 6 to return to the top dead center. At this time, the free end 191 of the trigger arm 19 disengaged comes into contact with the side surface 53 of the contact arm 5. (See FIGS. 12 and 13)
Next, when the trigger 3 is released, the trigger 3 is rotated about the rotation shaft 22 in a direction away from the trigger valve 23 via the trigger arm 19 by a spring 61 that presses the plunger 4 downward. Since the trigger arm 19 is always pushed forward by the spring 66, the trigger 3 rotates, and when the side surface portion 53 of the contact arm 5 and the free end portion 191 of the trigger arm 19 reach an angle, FIG. As shown in FIG. 9, the free end 191 of the trigger arm 19 slides on the side surface 53 of the contact arm 5 regardless of the plane 28 or the arc surface 29 of the rotation shaft 271 of the driving switch lever 27. Return to again.

  The operation described above indicates the pulling operation of the trigger 3 when the nail 8 is driven in a single shot. When the next nail driving operation is repeated, the tip 51 of the contact arm 5 is pressed against the mounting member 9 and released. The trigger 3 can be driven by pulling the trigger 3 again.

(Operation when the drive switching lever 27 is set to the “continuous drive mode”)
Next, a driving operation (sequential driving mode) when the driving switching lever 27 is set to the locking portion 30b and the arc surface outer peripheral surface 29 of the rotating shaft 272 is opposed to the trigger arm 19 side will be described.

(1) About the operation | movement which open | released the contact arm 5 and performed the trigger pulling operation, as FIG.10 and FIG.11 shows, when the trigger 3 is pulled first, like the above-mentioned case, the pivot part 24 of the trigger arm 19 is carried out. Therefore, the central portion 192 of the trigger arm 19 comes into contact with the distal end portion of the plunger 4. The plunger 4 is always pressed downward by the spring 61, and the load of the spring 61 is set larger than the load of the spring 6 pushing the contact arm 5 to the top dead center as described above. 4 is a fulcrum, the pivot 24 is a force point, the free end 191 of the trigger arm 19 pushes down the contact arm upper end 52 against the load of the spring 6, and the contact arm 5 is moved from the top dead center. It moves against the bottom dead center position against the spring 6. As a result, the plunger 4 does not move and remains at the bottom dead center, the trigger valve 23 is not turned ON, and the nail driving machine 1 cannot be started only by pulling the trigger 3 except during the driving operation. (See FIGS. 10 and 11)
When the contact arm 5 and the trigger 3 are released, the free end 191 of the trigger arm 19 returns the side surface 53 of the contact arm 5 to the sliding engagement position again, as shown in FIGS. It will be in the initial state. (See Figs. 8 and 9)
(2) Consecutive driving operation When the arc surface outer peripheral surface 29 of the rotating shaft 271 of the driving switching lever 27 is directed to the trigger arm 19 side, the rotating shaft 271 (driving switching lever 27) is shown in FIG. Since the rotation angle about the pivot 24 of the trigger arm 19 is limited by the outer peripheral surface 29 of the arc surface, the upper end 52 of the contact arm 5 and the free end 191 of the trigger arm 19 are always engaged. It becomes.

For this reason, even if the trigger 3 is pulled after the tip 51 of the contact arm 5 is first pressed against the mounting member 9, the upper end 52 of the contact arm 5 and the free end 191 of the trigger arm 19 remain engaged. The combined state can be maintained. Conversely, even if the tip 3 of the contact arm 5 is pressed against the mounting member 9 after the trigger 3 has been pulled first, the engagement state can be maintained in the same manner. Nails can be driven. Furthermore, the trigger valve can be turned OFF by opening either the trigger 3 or the contact arm 5. That is, after the nail driving operation, the tip 51 of the contact arm 5 is moved away from the mounting member 9 or the trigger 3 is returned to the initial position, so that the next nail driving operation can be performed and the continuous driving operation can be performed. (See FIGS. 10 and 11)
For example, as shown in FIG. 10 (FIG. 11), if the contact arm 5 is moved and pressed against the next driving portion 91 with the trigger 3 being pulled, the upper end portion 52 of the contact arm 5 and the trigger arm Since the free end portion 191 of 19 holds the engaged state, the trigger valve 23 is turned on only by pressing the contact arm 5 to enable the next nail driving operation.

  As will be apparent from the above description of the embodiment, according to the present invention, the rotation of the trigger arm 19 is controlled by switching the driving switch lever 27 to the continuous driving mode 30b side, and the contact arm upper end 52 And the trigger arm free end 191 can be always engaged. Thereby, the continuous driving operation is possible in addition to the single driving operation. In this case, it is possible to reduce unintentional damage to the mounting member due to the contact arm tip during movement of the driving machine main body. Further, the operability and workability of the driving machine can be improved by selecting the continuous driving mode.

  In the above embodiment, the driving machine in which the drive source is the compressed air system has been described. However, the present invention can also be applied to an electric motor system and a gas combustion system driving machine. For example, when the electric motor system is adopted, the drive circuit of the electric motor that is the drive source can be controlled to be turned on or off by replacing the trigger valve in the above embodiment with an electric switch for opening and closing the electric circuit. it can. In addition to the nail driving machine, the present invention can also be applied to a driving machine that drives other stoppers such as staples into the mounting member.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. .

The side view including the partial cross section of the driving machine which concerns on embodiment of this invention. The expanded sectional view which expanded the front-end | tip part of the driving machine shown in FIG. The disassembled perspective view of the trigger part of the driving machine shown in FIG. The assembly side view of the trigger part of the driving machine shown in FIG. FIG. 4 is an assembly cross-sectional view of a trigger portion of the driving machine shown in FIG. 3. The elements on larger scale of the assembly sectional view of the trigger part in the driving machine shown in FIG. The front view which shows the front-end | tip part of the driving machine shown in FIG. Sectional drawing of the contact arm and trigger arm of the driving machine shown in FIG. The elements on larger scale of the trigger part of the driving machine shown in FIG. Sectional drawing of the state which performed the trigger pulling operation of the driving machine shown in FIG. The expanded sectional view of the state which performed the trigger pulling operation of the driving machine shown in FIG. Sectional drawing of the state which the contact arm of the driving machine shown in FIG. 1 returned to the top dead center. The expanded sectional view of the state where the contact arm of the driving machine shown in FIG. 12 returned to the top dead center. Sectional drawing of the state which pushed the contact arm of the driving machine shown in FIG. 1, and performed trigger pulling operation. The expanded sectional view of the state which pressed the contact arm of the driving machine shown in FIG. 14, and performed trigger pulling operation.

Explanation of symbols

1: Driving machine 2: Magazine 3: Trigger 4: Plunger 5: Contact arm 51: Contact arm tip 52: Contact arm upper end 53: Contact arm side surface 54: Guide rod 6: Contact arm spring 61 : Spring of plunger 66: Spring of trigger arm 7: Injection path 8: Nail 81: Connection nail 9: Mounting member 91: Groove 10: Guide plate 11: Housing 12: Bit guide 121: Feeding path 122: Foot receiving part 123 : Guide convex part 13: Feeding member 14: Piston 15: Handle housing part 15a: Pressure accumulating chamber 15b: Air plug 16: Screw 17: Screw 18: Driver bit 19: Trigger arm 191: Free end 192 of the trigger arm: Trigger arm 193: trigger arm slot 194: mounting member 0: Head valve 21: Cylinder 22: Rotating shaft 23: Trigger valve 24: Pivoting part 25: Nose 26: Injection part 27: Driving switch lever 271: Rotating part of driving switch lever 272: Rotating shaft 28: Switching lever rotating shaft Plane outer peripheral surface 29: Arc surface outer peripheral surface 30a, 30b of the switching lever rotating shaft: Locking hole of the switching lever rotating portion 31: Locking portion of the switching lever rotating portion

Claims (4)

A driver bit for striking a stopper loaded in the injection unit, a striking drive means for reciprocating the driver bit and driving the stopper from the ejection unit, and controlling activation or stop of the striking drive unit Trigger means operable to pull in a predetermined direction, movable means for mechanically or electrically coupling the trigger means and the impact driving means, and a contact arm extending from one end to the other end, the one end Is arranged in the vicinity of the trigger means so as to be engaged in response to a pulling operation or a release operation of the trigger means, and the other end is arranged in the injection portion in a direction parallel to the moving direction of the driver bit. A contact arm that is movably supported and biased in the direction of the one end by a pressing means. The movable means is turned ON to activate the percussion drive means, after driving the stopper, the driving machine to OFF the movable means by opening said trigger means or the contact arm,
Further comprising driving switching means for switching the engagement state of the trigger means and the contact arm to a single driving mode or a continuous driving mode;
When the driving switching means selects the single driving mode, when the trigger means or the contact arm is opened, the contact arm and the trigger means are controlled to be disengaged,
When the driving switch means selects the continuous driving mode, the driving machine controls the contact arm and the trigger means to always engage when the trigger means or the contact arm is opened.   The driving switching means is composed of a rotation shaft arranged to control the rotation operation of the trigger means, and a switching lever connected to one end of the rotation shaft, and the rotation shaft is in a cross-sectional shape, A plane outer peripheral surface and an arc surface outer peripheral surface, and the switching lever switches the plane outer peripheral surface to the trigger means to switch to the single shot mode, and the switch lever controls the arc surface outer peripheral surface to the trigger means. A driving machine characterized by switching to the continuous driving mode by facing the motor. A driving machine main body for driving a nail and a magazine for feeding a connecting nail to the injection section under the driving machine main body, in which a hammering means having a driver bit is built in the injection section. And a bit guide provided in the injection portion and having a feeding path for guiding the driver bit and the leading nail of the connecting nail, and always downward so as to control the start-up of the driving machine main body in the vicinity of the trigger. An activation switch having a plunger to be pressed, a trigger arm positioned between the plunger and the trigger, and rotatably accommodated and supported in the trigger via a pivotal support, and an upper end portion and a distal end portion of the trigger A contact arm that is positioned in the vicinity and in the vicinity of the bit guide, and is supported by the bit guide so as to be movable in a direction parallel to the moving direction of the driver bit, Pressing means for constantly urging the contact arm toward the top dead center, and the free end of the trigger arm is provided at a position where it abuts and engages with the upper end of the contact arm, and the contact arm and the trigger cooperate. In the driving machine that turns on the activation switch by operation and turns off the activation switch by opening the trigger or the contact arm after driving the nail,
A switching lever for switching the engagement state between the trigger arm and the contact arm;
By rotating the switching lever to the first state, the free end portion of the trigger arm and the contact arm upper end portion are controlled so that they are always engaged,
By rotating the switching lever to the second state, the free end portion of the trigger arm and the upper end portion of the contact arm are disengaged while the contact arm is being lowered, and the contact arm is dead by the pressing means. A driving machine controlled to return to a point. The trigger is composed of a trigger arm having an elongated hole so that one end can be slid back and forth while being pivotally supported by a pivotal support, and a second pressing means for constantly pressing the trigger arm forward.
The switching lever is formed in a cross-sectional shape at a rotating shaft formed from one outer peripheral surface of the arc surface and the other outer peripheral surface of the flat surface, a rotating portion that rotates in conjunction with the rotating shaft, and the rotating portion. And a locking hole formed on the trigger for locking the locking portion,
The first state of the switching lever is rotated so that the arc surface of the rotating shaft of the switching lever is opposed to the trigger arm, and the second state of the switching lever is that of the switching lever. 4. The driving machine according to claim 3, wherein the driving machine is rotated so that the plane of the rotation shaft faces the trigger arm.
By rotating the switching lever to the first state, the free end portion of the trigger arm and the contact arm upper end portion are controlled so that they are always engaged,
By rotating the switching lever to the second state, the free end portion of the trigger arm and the upper end portion of the contact arm are disengaged while the contact arm is being lowered, and the contact arm is dead by the pressing means. A driving machine controlled to return to a point.

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