JP2010069543A - Driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving machine capable of switching to a continuous driving state. <P>SOLUTION: This driving machine includes a trigger arm 13 for starting a starting part 14 according to the rotating operation of a trigger 12 pivotally supported on a housing 2 in a rotary shaft part 12A, a contact arm 32 engaged with the trigger arm 13, and a switching mechanism provided in the rotary shaft part 12A and in the vicinity of the rotary shaft part 12A to move the trigger arm 13 to first advancing/retreating region and second advancing/retreating region approached or separated to/from the rotary shaft part 12A in cooperation with a spring 13B for energizing the trigger arm 13 to the rotary shaft part 12A side. In the driving machine, the trigger arm 13 and the contact arm 32 are engaged with each other after also the rotating operation of the trigger 12 in a state of the trigger arm 13 located in the first advancing/retreating region, and the trigger arm 13 and the contact arm 32 are disengaged with each other after the rotating operation of the trigger 12 in a state of the trigger arm 13 located in the second advancing/retreating region. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a driving machine, and more particularly to a driving mechanism switching mechanism.

  In order to construct a finished building material for a building interior, it is common to attach the finished building material with an adhesive and then drive a finishing nail into a relatively narrow groove provided in the finished building material. For finishing nails, the head of the nail is colored in the same color according to the appearance color of the finished building material, and a small head diameter is used to drive it into the groove of the finished building material, leaving scratches and dents on the finished building material. A clean finish is required with care taken into account.

  In the nailing machine that drives the connecting nails loaded in the magazine one by one from the tip of the bit guide, a contact arm is provided to prevent accidental firing of the nail, the tip of the contact arm is pressed against the finished building material, and the contact arm is The trigger operation is made effective only when the trigger lever is retracted, and then the nail is fired and driven into the finished building material by pulling the trigger lever.

  On the other hand, the applicant has proposed a nailing machine provided with a pressing means for constantly pressing the contact arm toward the top dead center as shown in Patent Document 1. In this nailing machine, the finish and workability are improved because the tip of the contact arm does not need to be strongly pressed against the finished building material.

Further, as shown in Patent Document 2, the applicant disengages the free end portion of the trigger arm and the tip end portion of the contact arm while the contact arm is being lowered, and returns the contact arm to the top dead center by the pressing means. In addition, the trigger arm is made slidable, and a pressing means is provided to constantly push the trigger arm forward in the trigger. When the trigger is released, the nail hammering is re-engaged with the free end of the trigger arm and the upper end of the contact arm. Proposing a machine. This nailing machine prevents accidental firing and damage to the member when the contact arm contacts the member, and when the nail driver body is moved after the nail is driven, the nailing machine body is greatly lifted. It is possible to move the nail driver main body so that it slides, and the driving efficiency and changeability are improved.
JP 2002-283253 A JP 2005-7547 A

  However, in the type of nailing machine in which the contact arm of Patent Document 1 and Patent Document 2 is returned to the top dead center by the pressing means, the contact arm is pressed against the driven member while the trigger lever is pulled, and the top dead center By moving to a point, there was a drawback that the so-called continuous hitting was not possible. In the driving operation, there is a case where a quick and efficient operation is required rather than the accuracy and the finishing, and the operation is generally performed by continuous driving. However, in the conventional structure, only the so-called single shot operation in which the trigger lever that has been pulled has to be returned to the initial position and the nail driving operation from the beginning must be started again can be performed.

  Accordingly, an object of the present invention is to provide a nailing machine that eliminates the above-described drawbacks of the prior art and can be switched to a state in which so-called continuous driving can be performed.

  In order to solve the above-described problems, the present invention provides a housing, a nose portion that is provided at an end portion of the housing and injects a stopper, and is orthogonal to an injection direction of the stopper that is provided in the housing or the nose portion. A trigger lever that is pivotally supported by a rotation shaft portion extending in a direction and rotates around the rotation shaft portion, an activation portion that is activated to allow an injection operation of the stopper, and the rotation shaft on the trigger lever A trigger arm that is pivotally supported by an axis parallel to the portion and advances and retreats in a direction orthogonal to the axial direction of the rotation shaft portion, and abuts on the activation portion and activates the activation portion according to the rotation operation of the trigger lever And arranged to straddle from the nose part to the vicinity of the trigger lever so as to be movable in parallel with the injection direction, and engaged / disengaged with the trigger arm and engaged with the trigger arm. In the state, the trigger is moved to a position where the trigger can be activated. A contact arm that moves the arm, a biasing means that biases the contact arm in the reflecting direction, a biasing portion that biases the trigger arm toward the rotating shaft, a rotating shaft, and a rotating shaft. Provided in the vicinity of the moving shaft portion, and in cooperation with the urging portion, the trigger arm is selectively used as a first advancing / retreating region near the rotating shaft portion and a second advancing / retreating region separated from the rotating shaft portion. The trigger arm and the contact arm are arranged so that the trigger arm and the contact arm are in contact with each other even after the trigger lever is rotated in a state where the trigger arm is located in the first advance / retreat region. In the state where the arm is engaged and the trigger arm is positioned in the second forward / backward movement area, the strike arm disposed at a position where the trigger arm and the contact arm are disengaged after the trigger lever is rotated. Provide a built-in machine.

  According to such a configuration, the trigger arm and the contact arm are engaged after the stopper is driven by switching the trigger arm position between the first advance / retreat area and the second advance / retreat area by the switching mechanism by the driving machine user. • Two disengaged states can be selected. When the trigger arm and contact arm are engaged, so-called continuous hitting is possible, and when the trigger arm and contact arm are not engaged, only so-called single hitting is possible. Thus, single shot and continuous shot can be selected. Further, since there is a switching mechanism, it is possible to easily determine whether the driving machine is in a single shot or a continuous shot by visually checking the operating state of the switching mechanism.

  In the driving machine having the above-described configuration, the activation unit includes a plunger that is pushed into the trigger arm in response to a turning operation of the trigger lever, and the trigger arm is connected to the second arm and the trigger arm. It is preferable that an engaging portion and an engaged portion that are engaged with each other while being positioned in the advance / retreat region are provided.

  According to such a configuration, after the trigger arm located in the second advance / retreat area comes into contact with the plunger, the trigger arm can remain in the second advance / retreat area by the engagement between the trigger arm and the plunger.

  The switching mechanism includes a rotating portion, a switching arm, and a pressing portion, and the rotating portion is rotated about a rotation axis parallel to the rotating shaft portion, and is provided on one of the peripheral surfaces of the rotating portion. A recess is formed by cutting out the portion, and the switching arm is configured to be swingable about the rotating shaft, and is inserted into the recess and from within the recess according to the rotation of the rotating portion. A swing converting portion that is discharged and converts the rotational motion of the rotating portion into a swing motion; and the trigger arm is brought into contact with the trigger arm according to the swing of the general swing converting portion, and the trigger arm is A contact portion that moves toward the second advance / retreat region, and the pressing portion biases the switching arm so that the trigger arm moves against the biasing force of the pressing portion. .

  According to such a structure, a switching mechanism can be made into a simple structure of a rotation part, a switching arm, and a press part, and the increase in a component can be suppressed.

  The trigger lever and the rotating part are arranged at a position where the turning locus of the trigger lever interferes with a part of the rotating part, and the trigger is placed at a position where the turning part interferes with the turning locus. It is preferable that a notch through which the lever can pass is formed.

  According to such a configuration, the rotation trajectory of the trigger lever interferes with the rotating portion, so that the rotating portion can be used as a lock for preventing the trigger lever from malfunctioning.

  In order to solve the above problems, a housing, a nose portion provided at an end portion of the housing to inject a stopper, and a direction provided in the housing or the nose portion and orthogonal to the injection direction of the stopper A trigger lever pivotally supported by the extending pivot shaft and pivoting about the pivot shaft, and a plunger movable between the first region and the second region, and the plunger is pushed into the first lever An activation part that moves from the second area to the first area to allow the stopper to be ejected, and a pivot that is pivotally supported by the trigger lever at a shaft parallel to the pivot shaft. A trigger arm that pushes the plunger in response to the pivoting movement of the trigger lever, and is arranged to straddle from the nose portion to a position near the trigger lever so as to be movable in parallel with the injection direction. And press the plunger. A contact arm that moves the trigger arm to a retractable position, and a biasing means that biases the contact arm in the reflecting direction, and the trigger arm has a free end on the circumferential surface of the rotating shaft portion. The rotating shaft portion is formed in a substantially columnar shape and is rotatable around the axis and the trigger arm is hooked, and is engaged with the plunger between the free end and the shaft portion. A recess is formed in which a part of the surface is cut out, and the plunger is always pushed first by the trigger arm in a state where the trigger lever rotates and the free end is hooked on the peripheral surface. There is provided a driving machine which is located in a region and is located in a second region by the trigger arm in a state where the trigger lever rotates and the free end is hooked in the recess.

  According to such a configuration, the position of the plunger in a state where the trigger lever is pulled and rotated by the rotation of the rotation shaft portion can be arranged in the first region and the second region. Since the plunger that is always in the first region cannot move from the second region to the first region, injection of the stopper is not permitted. Therefore, in this state, in order to move the plunger to the second region, it is necessary to stop the pulling operation of the trigger lever, so that so-called continuous hitting cannot be performed. On the other hand, since the plunger in the second region can move from the second region to the first region, the contact arm is operated to pull the stopper continuously while pulling the trigger lever. Is possible.

  According to the driving machine of the present invention, it is possible to switch to a state in which so-called continuous driving can be performed.

  Hereinafter, a driving machine according to a first embodiment of the present invention will be described with reference to FIGS. A nail driver 1 which is a driving machine shown in FIG. 1 is a tool for driving a nail 11 (FIG. 2) which is a stopper, and uses compressed air as its power.

  The nailing machine 1 is mainly composed of a housing 2 and a nose portion 3, and the housing 2 is integrally provided with a handle 2A extending in a direction crossing an injection direction described later. In order to accumulate compressed air from a compressor (not shown), a pressure accumulating chamber 2a is formed in the handle 2A and the housing 2 of the nail driver 1. The pressure accumulating chamber 2a is connected to a compressor (not shown) via an air hose (not shown).

  A cylindrical cylinder 21 is provided in the housing 2. A piston 4A is provided in the cylinder 21 so as to be slidable up and down. A driver blade 4B is integrally formed with the piston 4A. The direction in which the driver blade 4B moves together with the piston 4A to hit the nail 11 is defined as the injection direction, and the nose portion 3 side with respect to the housing 2 is defined as the lower side (the opposite side is defined as the upper side).

  A return chamber 21a for storing compressed air for returning the driver blade 4B to the top dead center is provided on the outer periphery of the lower end of the cylinder 21. A check valve 21A is provided in the central portion of the cylinder 21 in the axial direction, and an air passage is formed in the check valve 21A so as to flow only in one direction from the inside of the cylinder 21 to the return chamber 21a outside the cylinder 21. An air passage (not shown) that is always open to the return chamber 21a is formed below 21. A piston bumper 4C for absorbing surplus energy of the piston 4A after driving the nail 11 is provided at the lower end of the cylinder 21.

  The upper outer periphery of the cylinder 21 includes a main valve 41, a main valve chamber 42 that houses the main valve 41, a main valve spring 43 that urges the main valve 41 toward the bottom dead center, and the like. An air passage 44 is formed in the main valve 41 and can communicate with the atmosphere only when the main valve 41 is in contact with the end of the cylinder 21 through an exhaust hole (not shown) provided in the upper portion of the housing 2. It is configured. The main valve 41 abuts against the end of the cylinder 21 to shut off the inner space of the cylinder 21 and the pressure accumulating chamber 2a, and compressed air is supplied from the trigger valve portion 14 described later to the main valve chamber 42 via the air passage 14a. Only when it flows in, it moves upward to connect the internal space of the cylinder 21 and the pressure accumulating chamber 2a. By connecting the space in the cylinder 21 and the pressure accumulating chamber 2a, the pressure in the space above the piston 4A in the cylinder 21 becomes higher than the pressure in the space below the piston 4A, and the piston 4A rapidly moves downward based on this pressure difference. In response to this, the driver blade 4B moves downward in an injection passage 3a described later.

  As shown in FIG. 2, a trigger lever 12, a trigger arm 13, a trigger valve unit 14, and a switching mechanism are provided at the base of the handle 2A.

  The trigger lever 12 is provided on the housing 2 and is pivotally supported by a rotation shaft portion 12A having an injection direction and a direction orthogonal to the extending direction of the handle 2A as an axial direction, and rotates around the rotation shaft portion 12A. It is configured to be possible. A free end portion of the trigger lever 12 is provided with a shaft portion 12B that pivotally supports the trigger arm 13 and a spring support portion 12E that is pivotally supported by the shaft portion 12B. The trigger lever 12 is interposed between the trigger lever 12 and the housing 2 at a position in the vicinity of the rotation shaft portion 12A, and the trigger lever 12 is rotated clockwise on the paper surface of FIG. 2 (the free end of the trigger lever 12 faces downward). A spring 12D is provided to apply a rotational force that rotates. In addition, a contact portion 12C that can contact a switching arm 16 described later is provided in the vicinity of the rotation shaft portion 12A of the trigger lever 12 and at a position opposite to the free end of the trigger lever 12 with respect to the rotation shaft portion 12A. Yes.

  The trigger arm 13 is mainly composed of a base portion 13A, a first arm portion 13C, a second arm portion 13D, and a protruding portion 13E. The base portion 13A is formed with a long hole, and a shaft portion 12B is inserted into the long hole. The base portion 13A can be rotated about the shaft of the shaft portion 12B and can move in a direction perpendicular to the axial direction of the shaft portion 12B. ing. 13 C of 1st arm parts are extended toward the direction which goes to 12 A of rotation shaft parts from 13 A of bases. The second arm portion 13D branches from the middle of the first arm portion 13C, is positioned below the first arm portion 13C, and extends in a direction toward the rotating shaft portion 12A in parallel with the first arm portion 13C. ing. The protruding portion 13E is provided so as to protrude upward from the vicinity of the portion where the second arm portion 13D of the first arm portion 13C branches. The first arm portion 13C is a portion where the tip mainly contacts the switching arm 16 described later, and the lower surface portion of the second arm portion 13D is engaged / non-engaged with the rear end portion 32B of the contact arm 32 described later. This is the place where the relationship of engagement is taken.

  A spring 13B as an urging portion is interposed between the base portion 13A and the spring support portion 12E, and the spring 13B urges the trigger arm 13 in a direction toward the rotating shaft portion 12A. Since the trigger arm 13 is pivotally supported by inserting the shaft portion 12B into the elongated hole, the trigger arm 13 is biased by the spring 13B and is located in a region (first advance / retreat region) close to the rotating shaft portion 12A. It is possible to move to a region (second advance / retreat region) separated from the rotating shaft portion 12A against the urging force of 13B.

  The trigger valve portion 14 is provided at a position above the trigger arm 13 of the housing 2 and controls compressed air that is supplied to the main valve chamber 42 through the air passage 14a. The trigger valve section 14 is provided with a plunger 15, and the plunger 15 moves from the bottom dead center in the second area or a position near the bottom dead center to the top dead center or the position near the top dead center in the first area. As a result, the compressed air is supplied to the main valve chamber 42.

  The plunger 15 is urged downward by a spring 14A, and an engaging portion 15A capable of engaging with the protruding portion 13E is provided at the lower end portion, and the protruding portion 13E is disposed at a position where the protruding portion 13E can contact the trigger arm 13. ing.

  The switching mechanism mainly includes a switching arm 16, a rotating part 17, and a spring 18 that is a pressing part. The switching arm 16 is pivotally supported by the rotating shaft portion 12A and mainly includes a contact portion 16A and a swing converting portion 16B. The contact portion 16A is configured to extend in a direction orthogonal to the rotating shaft portion 12A, and the tip portion thereof is a free arm of the trigger arm 13 and the first arm portion 13C end portion and the second arm portion 13D end portion. It is comprised so that contact is possible.

  The swing conversion portion 16B is composed of an arm portion that is integral with the contact portion 16A, is orthogonal to the rotation shaft portion 12A, and extends in a direction intersecting the contact portion 16A. By engaging, the rotary motion of the rotary portion 17 is converted into the swing motion of the switching arm 16 around the rotary shaft portion 12A. Since the swing conversion portion 16B and the contact portion 16A are integral, the contact portion 16A also swings around the rotation shaft portion 12A. Since the free end of the trigger arm 13 can come into contact with the contact portion 16A, the contact portion 16A resists the biasing direction of the spring 13B with the free end of the trigger arm 13 in contact with the contact portion 16A. By swinging in the direction, the trigger arm 13 can be moved from the first advance / retreat area to the second advance / retreat area. Further, the swing conversion portion 16B and the contact portion 16A intersect at an angle at which the rotation portion 17 can be inserted at a position on the narrow angle side between the swing conversion portion 16B and the contact portion 16A. .

  In the switching arm 16, a contacted portion 16C capable of contacting the contact portion 12C is provided in the vicinity of the rotating shaft portion 12A. When the contact portion 12C contacts the contacted portion 16C, the swinging of the switching arm 16 in the clockwise direction in FIG. 2 (direction in which the contact portion 16A resists the biasing direction of the spring 13B) is restricted. . Further, when the trigger lever 12 is pulled while the contact portion 12C is in contact with the contacted portion 16C, the switching arm 16 is rotated counterclockwise in FIG. 2 (the contact portion 16A follows the biasing direction of the spring 13B). Swing in the direction).

  The rotating portion 17 is formed in a cylindrical shape and is rotatably supported at a position in the vicinity of the rotating shaft portion 12A of the housing 2 so that the axial direction of the cylinder is parallel to the rotating shaft portion 12A. It overlaps with the turning locus of the lever 12 around the turning shaft portion 12A. As shown in FIG. 4, the rotating portion 17 includes a knob 17 </ b> A that is positioned outside the housing 2 and is operated to rotate, and a concave portion 17 a in which a part of the peripheral surface is cut out, and both sides of the concave portion 17 a. The formed notches 17b and 17b are formed.

  As shown in FIG. 2, the concave portion 17a is formed so that the cross section perpendicular to the rotating portion 17 has a substantially U-shape, and the swing conversion portion 16B is inserted into the concave portion 17a. Yes. The notch 17b is disposed at a position overlapping the rotation locus of the trigger lever 12, and is configured so that the rotation locus can pass through the notch 17b. Therefore, the rotating portion 17 is rotated, and the trigger lever 12 can be rotated only when the notch 17b is on the rotation locus of the trigger lever 12, and the notch 17b is not on the rotation locus of the trigger lever 12 (rotation). In a state in which the peripheral surface of the portion 17 is on the rotation locus of the trigger lever 12, the trigger lever 12 cannot be rotated. In addition, as shown in FIG. 14, the positional relationship between the recess 17a and the notch 17b is arranged such that the respective opening portions are opposite on the peripheral surface.

  The spring 18 is a torsion spring and is interposed between the switching arm 16 and the housing 2 and is switched so as to swing clockwise in FIG. 2 (direction in which the contact portion 16A biases the trigger arm 13). The arm 16 is biased. The urging force of the spring 18 is such that the abutting portion 16A abuts against the trigger arm 13 and moves the trigger arm 13 from the first advance / retreat region to the second advance / retreat region against the urging force of the spring 13B. Therefore, the switching mechanism can have a simple configuration including the rotating portion 17, the switching arm 16, and the spring 18 that is the pressing portion, and an increase in the number of components can be suppressed.

  The nose portion 3 is located at the lower end of the housing 2 and is connected to the housing 2; a bit guide 33 provided below the plate 31; and a reciprocating slide in the plate 31 and the bit guide 33 in a direction parallel to the injection direction. And a contact arm 32 that is movably supported.

  The contact arm 32 extends downward from the lower end of the bit guide 33 and is disposed so as to straddle the position near the trigger lever 12. A tip end portion 32 </ b> A that contacts the driven member W is defined at the lower end of the contact arm 32. A rear end portion 32 </ b> B that supports the trigger arm 13 in the vicinity of the trigger arm 13 and is engaged / disengaged with the trigger arm 13 is defined. As shown in FIG. 3, the contact arm 32 is urged so as to move upward (reflecting direction) with respect to the plate 31 and the bid guide 33 by springs 33A and 33A as urging means. The biasing force of the springs 33A and 33A is configured to be weaker than the biasing force of the spring 14A biasing the plunger 15. The nose portion 3 is formed with an injection passage 3a that passes through the bit guide 33 and the plate 31 and through which the driver blade 4B is inserted.

  In the nose portion 3, a magazine device 10 is connected to the plate 31, which supplies the nail 11 into the injection passage 3 a and incorporates a bundle in which a plurality of nails 11 are bundled and connected.

  As shown in FIG. 2, the magazine device 10 is mainly composed of a magazine 10A and a feeder 10B. The magazine 10 </ b> A is provided in the vicinity of the bit guide 33, is arranged substantially in parallel with the extending direction of the handle 2 </ b> A, and incorporates a bundle of nails 11 therein. The feeder 10B is built in the magazine 10A, has a spring (not shown), and urges the nail 11 toward the injection passage 3a by the elastic force of the spring (not shown).

  An operation of continuously driving the nail 11 with the so-called single shot by the nailing machine 1 having the above-described configuration will be described.

  When performing a single shot, as shown in FIG. 2, the knob 17A (FIG. 4) is rotated before and after the tip 32A of the contact arm 32 is pressed against the workpiece W, as shown in FIG. Thus, the rotation part 17 is arrange | positioned in the position (single-shot position) where the rocking | swiveling conversion part 16B is inserted in the recessed part 17a. At this time, as shown in FIG. 14, the notch 17 b is arranged at a position overlapping the rotation locus of the trigger lever 12, so that the trigger lever 12 and the rotating portion 17 do not interfere with each other.

  In this state, the switching arm 17 is rotated clockwise on the paper surface of FIG. 5 by the urging force of the spring 18 so that the swing conversion portion 16B is inserted into 17a, and the contact portion 16A is in contact with the free end position of the trigger arm 13. The trigger arm 13 is urged in contact and moved to the second advance / retreat region. The trigger arm 13 is carried by the outermost end portion of the rear end portion 32B of the contact arm 32 at a position near the free end of the second arm portion 13D and is shallowly coupled to the contact arm 32. It does n’t match.

  Next, the user pulls the trigger lever 12 to rotate the trigger lever 12 around the rotation shaft portion 12A. In this state, the contact portion 12C and the contacted portion 16C come into contact with the rotation of the trigger lever 12, and the switching arm 16 tilts counterclockwise on the paper surface of FIG. At this time, since the contact portion 12C swings in the direction in which the trigger arm 13 is urged, the trigger arm 13 attempts to move to the first advance / retreat region. However, since the plunger 15 and the trigger arm 13 come into contact with each other, and the engaging portion 15A and the projection 13E engage with each other, even if the contact portion 12C is separated from the trigger arm 13, the trigger arm 13 still remains in the second advance / retreat region. Is located.

  Further, the trigger lever 12 is pulled, and the trigger bubble portion 14 is operated in a state where the plunger 15 is moved to a position near the top dead center as shown in FIG. 7, and compressed air is supplied to the main valve chamber 42 through the air passage 14a. Then, the piston 4A and the driver blade 4B are operated (FIG. 1), and the nail 11 is driven into the driven member W (FIG. 2).

  When the nail driver 1 is moved away from the driven member W with the trigger 13 fully pulled, the spring 14A that urges the plunger 15 downward is more than the spring 33A that urges the contact arm 32 upward. Since the trigger arm 13 is strong and can rotate about the shaft portion 12B, the contact arm 32 is urged downward by the plunger 15 via the trigger arm 13 and moves downward as shown in FIG. The trigger arm 13 is still in the second advance / retreat region because the engagement portion 15A and the protrusion 13E are engaged, and the engagement between the trigger arm 13 and the rear end portion 32B is in the second advance / retreat region. The match is shallow. Therefore, when the contact arm 32 is lowered to some extent by the urging force of the plunger 15, the engagement between the contact arm 32 and the trigger arm 13 is released as shown in FIG. 9, and the contact arm 32 is urged by the urging force of the spring 33A. , Move upward again.

  When the contact arm 32 and the trigger arm 13 are disengaged, the plunger 15 moves to a position near the bottom dead center. In the state where the trigger 13 is pulled and the contact arm 32 and the trigger arm 13 are disengaged, the plunger 15 cannot be pushed to move the plunger 15 to a position near the top dead center. As shown in FIG. 10, the trigger lever 12 is not pulled and returned to the position before driving. In this state, the trigger arm 13 is located at the side surface position of the rear end portion 32B of the contact arm 32 by disengaging the engaging portion 15A and the protruding portion 13E, but the rear end portion 32B is urged by the biasing force of the spring 13B. It slides on the side surface, returns to the initial position shown in FIG. 5, and again takes the form in which the second arm portion 13D is carried by the outermost end portion of the rear end portion 32B.

  As described above, by setting the rotating portion 17 to the single shot position, after the trigger 13 is pulled and the nail 11 is driven, the nail 11 cannot be driven again unless the one end trigger 13 is returned to the original position. Only beating is possible.

  Next, continuous strike will be described. When continuously hitting, as shown in FIG. 11, the knob 17A (FIG. 4) is rotated, and the swing conversion portion 16B is discharged from the recess 17a, and the swing conversion portion 16B and the contact portion 16A The rotating part 17 is arranged at a position between (a continuous position). At this time, as shown in FIG. 15, the notch 17 b is arranged at a position overlapping the rotation locus of the trigger lever 12, so that the trigger lever 12 and the rotating portion 17 do not interfere with each other.

  Since the contact portion 16A does not contact the trigger arm 13 in this state, the trigger arm 13 is moved to the first advance / retreat region by the urging force of the spring 13B and is branched from the first arm portion 13C of the second arm portion 13D. The contact arm 32 is supported at the extreme end of the rear end portion 32B of the contact arm 32 in the vicinity, and is deeply coupled to the contact arm 32.

  When the trigger lever 12 is pulled in this state, the trigger arm 13 and the plunger 15 come into contact with each other as shown in FIG. 12, and the plunger 15 is pushed by the trigger arm 13 to move to a position near the top dead center, and the nail 11 is driven. It is.

  When the nail driver 1 is moved away from the driven member W after the nail 11 is driven, the contact arm 32 moves downward through the plunger 15 and the trigger arm 13 by the biasing force of the spring 14A as shown in FIG. However, since the trigger arm 13 and the contact arm 32 are deeply engaged, the engagement state of the trigger arm 13 and the contact arm 32 is not released unlike a single shot. Therefore, by pressing the tip 32A of the nail driver 1 against the driven member W again from the state of FIG. 13, the rear end 32B moves upward as shown in FIG. 12, and the plunger 15 is moved to the vicinity of the top dead center. Then, the nail 11 can be driven again.

  As described above, by setting the rotating portion 17 to the continuous position, after pulling the trigger 13 and driving the nail 11, the nail 11 can be driven again without returning the one-end trigger 13 to the original position. Is possible.

  When the nailing operation is prohibited, the rotating unit 17 is rotated and arranged (fixed position) so that the peripheral surface of the rotating unit 17 overlaps the rotation locus of the trigger lever 12 as shown in FIG. Thereby, since the trigger lever 12 cannot be rotated, the nail driving operation is suppressed. Therefore, by rotating the rotating part 17 to a predetermined position of the single shot position, the continuous position, and the fixed position, it is possible to easily select a state where the single shot, the continuous shot, and the nail 11 cannot be driven. Moreover, the operation state of the nail driver 1 can be easily visually confirmed by preliminarily illustrating a predetermined position corresponding to the rotation angle of the rotating portion 17 in the housing.

  Next, a driving machine according to a second embodiment of the present invention will be described with reference to FIGS. The driving machine according to the second embodiment is the same as that of the first embodiment except for the configuration relating to the trigger, the trigger arm, and the rotating shaft portion, and therefore only the changes to the first embodiment. explain.

  As shown in FIG. 17, the nail driver according to the second embodiment has an axial direction in the vertical direction and a direction orthogonal to the extending direction of the handle (not shown) in the vicinity of the trigger valve portion 14 of the housing 2. A rotation shaft portion 112A is provided, and a trigger 112 is provided on the rotation shaft portion 112A so as to be rotatable about the axis of the rotation shaft portion 112A. The rotating shaft portion 112A includes a lever (not shown) outside the housing 2, and is configured to be rotatable about an axis by operating the lever (not shown). A recess 112a having a substantially U-shaped cross section perpendicular to the rotation shaft portion 112A is formed on a part of the peripheral surface of the rotation shaft portion 112A. A trigger arm 113, which will be described later, is formed in the recess 112a. The free end is formed to be insertable.

  A shaft portion 112B parallel to the rotation shaft portion 112A is provided at a position near the free end of the trigger 112, and a trigger arm 113 is provided on the shaft portion 112B so as to be rotatable around the shaft portion 112B. . The trigger arm 113 is formed in a crank shape by bending a free end portion in a cross section orthogonal to the shaft portion 112B, and the crank-shaped free end portion is engaged with the peripheral surface of the rotating shaft portion 112A and the recess 112a. It is configured to be possible. In the trigger arm 113, the lower end portion of the plunger 15 can be brought into contact with a substantially central portion between the free end and the base end, and the rear end of the contact arm 32 is located at a position closer to the base end than the crank-shaped portion at the free end position. It is carried by the portion 32B.

  When a nail is driven once with the nailing machine having the above-described configuration, as shown in FIGS. 17 to 19, the rotary shaft portion 112 </ b> A is rotated by an unillustrated lever so that the opening of the recess 112 a is positioned downward. Let In this state, when the contact arm 32 is brought into contact with the driven member and the trigger 112 is pulled, as shown in FIGS. 17 and 18, the plunger 15 is moved from the bottom dead center that is the second region or from the position near the bottom dead center. In order to move to the top dead center or a position near the top dead center, which is an area, a nail is driven as described in the first embodiment.

  When the nailing machine is lifted with the trigger 112 pulled, the plunger 15 and the trigger arm 113 are moved downward by the biasing force of the spring 14A biasing the plunger 15 as shown in FIG. In response to the downward movement, the contact arm 32 carrying the trigger arm 113 also moves downward. Since the free end portion of the trigger arm 113 is hooked on the peripheral surface of the rotating shaft portion 112A, the trigger arm 113 cannot move further downward. In this state, the plunger 15 is still in the first region near the top dead center. positioned.

  The nailing operation is performed by moving the plunger 15 from the second region to the first region. In the state shown in FIG. 19, the nailing machine is again pressed against the driven member to move the contact arm 32 upward. At the same time, even if the trigger arm 113 is moved upward, the plunger 15 is merely pushed further in the first region, and does not take the action of moving from the second region to the first region. Therefore, it is not possible to make a continuous hit, and it is possible to release only the one end trigger 112 and to pull the trigger 112 again.

  Next, when continuously hitting, as shown in FIG. 20, the rotating shaft portion 112A is rotated by a lever (not shown) so that the opening of the concave portion 112a is positioned upward. In this state, the trigger arm 113 can be positioned at the lowermost end of the crank-shaped portion at the free end position in the recess 112a, so that the trigger arm 113 can be positioned lower than in the single shot state. It becomes possible.

  Therefore, when the nail driver is moved away from the driven member while the trigger 112 is pulled after the trigger 112 is pulled and the nail is driven, the plunger 15 and the trigger arm 113 are moved downward by the biasing force of the spring 14A. However, since the free end position of the trigger arm 113 enters the recess 112a, the plunger 15 can move to a position near the bottom dead center that is the second region. In this state, when the nailing machine is pressed against the driven member again to move the contact arm 32 upward and the trigger arm 113 is moved upward, the plunger 15 moves from the second region to the first region. The hitting operation can be performed, and so-called continuous hitting becomes possible.

  The present invention is not limited to the above-described embodiments, and various improvements and modifications can be made within the scope described in the claims. For example, in both the first and second embodiments, the pneumatic nailer has been described. However, the plunger is replaced only with a switch or the like not only in this but also in an electric or combustion nailer. Similarly, the present invention can be applied. Further, not only a nail driver, but also a configuration including a contact arm that abuts against a driven member and a trigger and trigger arm that is pulled, the invention is not limited to a nail driver and can be widely applied to a driver. Needless to say.

1 is a side cross-sectional view of a nailing machine according to a first embodiment of the present invention. The fragmentary sectional view which concerns on the nose part periphery of the nailing machine concerning 1st embodiment of this invention. The partial front view which concerns on the nose part periphery of the nailing machine concerning 1st embodiment of this invention. The fragmentary sectional view which concerns on the rotation part periphery of the nailing machine concerning 1st embodiment of this invention. The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is single-shot (state before trigger lever pulling operation). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is single-shot (the state where the trigger lever is started to be pulled). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is single-shot (a state where the nail is driven). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is single-shot (a state where the nail driver is separated from the driven member). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is single-shot (state where the trigger arm and the contact arm are not engaged). The fragmentary sectional view of the trigger lever peripheral position in the state where the nail driver according to the first embodiment of the present invention is single-shot (the state where the trigger lever pulling operation is finished). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the first embodiment of the present invention is continuously driven (state before trigger lever pulling operation). The fragmentary sectional view of the trigger lever peripheral position in the state where the nail driver according to the first embodiment of the present invention is continuously driven (a state where the nail is driven). The fragmentary sectional view of the trigger lever peripheral position in the state where the nail driver according to the first embodiment of the present invention is continuously driven (a state where the nail driver is separated from the driven member). It is sectional drawing along the AA line of FIG. 4, Comprising: The figure which shows the state in which a rotation part is a single shot position. It is sectional drawing along the AA line of FIG. 4, Comprising: The figure which shows the state in which a rotation part is a continuous position. It is sectional drawing along the AA line of FIG. 4, Comprising: The figure which shows the state in which a rotation part is a fixed position. The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the second embodiment of the present invention is single-shot (state before trigger lever pulling operation). The fragmentary sectional view of the trigger lever periphery position in the state where the nail driver according to the second embodiment of the present invention is single-shot (the state where the nail is driven). The fragmentary sectional view of the trigger lever peripheral position in the state where the nail driver according to the second embodiment of the present invention is single-shot (a state where the nail driver is separated from the driven member). The fragmentary sectional view of the trigger lever peripheral position in the state where the nail driver according to the second embodiment of the present invention is continuously driven (a state where the nail driver is separated from the driven member).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 .... Nailer 2 ... Housing 2A ... Handle 2a ... Accumulator 3 ... Nose part 3a ... Injection passage 4A ... Piston 4B ... Driver blade 4C ... Piston bumper 10 ... Magazine device 10A ... · Magazine 10B · · Feeder 11 · · Nail 12 · · Trigger lever 12A · · Shaft portion 12B · · Shaft portion 12C · · Contact portion 12D · · Spring 12E · · Spring support 13 · · Trigger arm 13A · · Base 13B · · Spring 13C · · First arm 13D · · Second arm 13E · · Protrusion 14 · · Trigger valve portion 14A · · Spring 14a · · Air passage 15 · · Plunger 15A · · Engagement portion 16 ··· Switching arm 16A ··· Contacting portion 16B ··· Swing conversion portion 16C · · Contacted portion 17 · · Rotary portion 17A · · · Knob 17a · · · recess 17b · · · notch 18 · · · Spring 21 ・ ・ Cylinder 21A ・ ・ Check valve 21a ・ ・ Return chamber 31 ・ ・ Plate 32 ・ ・ Contact arm 32A ・ ・ Tip 32B ・ ・ Rear end 33 ・ ・ Bit guide 33A ・ ・ Spring 41 ・ ・ Main valve 42..Main valve chamber 43..Main valve spring 44..Air passage

Claims (5)

A housing;
A nose portion provided at an end of the housing for injecting a stopper;
A trigger lever pivotally supported by a pivot shaft provided in the housing or the nose portion and extending in a direction perpendicular to the injection direction of the stopper, and pivoting around the pivot shaft;
An activation part that is activated to allow an injection operation of the stopper;
The trigger lever is pivotally supported by an axis parallel to the rotation shaft portion, and advances and retreats in a direction perpendicular to the axial direction of the rotation shaft portion, and abuts on the activation portion according to the rotation operation of the trigger lever. A trigger arm that activates the activation unit;
In a state of being able to move parallel to the injection direction and extending from the nose portion to the vicinity of the trigger lever, and being engaged / disengaged with the trigger arm, A contact arm that moves the trigger arm to a position where the activation unit can be activated;
A biasing means for biasing the contact arm in the reflection direction;
An urging portion for urging the trigger arm toward the rotating shaft portion;
The trigger shaft is provided in the vicinity of the rotation shaft portion and in the vicinity of the rotation shaft portion, and the trigger arm is separated from the rotation shaft portion in close proximity to the rotation shaft portion in cooperation with the biasing portion. A switching mechanism that selectively moves forward and backward to the second forward / backward region,
The trigger arm and the contact arm are engaged with the trigger arm and the contact arm even after the trigger lever is rotated in a state where the trigger arm is located in the first advance / retreat region. A driving machine characterized by being disposed at a position where the trigger arm and the contact arm are disengaged after the trigger lever is rotated in the state of being located in the second advance / retreat region. The activation unit has a plunger that is pushed into the trigger arm in response to a rotation operation of the trigger lever,
The plunger and the trigger arm are provided with an engaging portion and an engaged portion, respectively, which are engaged with each other when the trigger arm is positioned in the second advance / retreat region. The driving machine according to 1. The switching mechanism includes a rotating part, a switching arm, and a pressing part,
The rotating portion is rotated around a rotating shaft parallel to the rotating shaft portion, and a concave portion in which a part of the peripheral surface of the rotating portion is cut out is formed,
The switching arm is configured to be swingable about the rotating shaft portion, and is inserted into the concave portion and is discharged from the concave portion according to the rotation of the rotating portion to swing the rotational motion of the rotating portion. A swing conversion portion that converts to a dynamic motion, and a contact that contacts the trigger arm in accordance with the swing of the general swing conversion portion and moves the trigger arm from the first advance / retreat region toward the second advance / retreat region. And
3. The driving device according to claim 1, wherein the pressing portion biases the switching arm so that the trigger arm moves against a biasing force of the pressing portion. Machine. The trigger lever and the rotating part are arranged at a position where a turning locus of the trigger lever interferes with a part of the rotating part,
4. The driving machine according to claim 3, wherein the rotating portion is formed with a notch through which the trigger lever can pass at a position that interferes with the rotation locus. A housing;
A nose portion provided at an end of the housing for injecting a stopper;
A trigger lever pivotally supported by a pivot shaft provided in the housing or the nose portion and extending in a direction perpendicular to the injection direction of the stopper, and pivoting around the pivot shaft;
An actuating portion having a plunger movable between the first region and the second region, the plunger being pushed in and moved from the second region to the first region, and allowing the stopper to be ejected;
A trigger arm that is pivotally supported by the trigger lever at a shaft portion parallel to the rotation shaft portion and is rotatable about the shaft portion; and a trigger arm that pushes the plunger in response to the rotation operation of the trigger lever;
A contact arm that is arranged to extend from the nose portion to a position near the trigger lever so as to be movable in parallel with the injection direction, and to move the trigger arm to a position where the plunger can be pushed in by engaging with the trigger arm;
Biasing means for biasing the contact arm in the reflection direction,
The trigger arm has a free end hooked on a peripheral surface of the rotating shaft portion and abuts against the plunger between the free end and the shaft portion,
The rotating shaft portion is formed in a substantially cylindrical shape and is rotatable around an axis, and is formed with a recess in which a part of the peripheral surface on which the trigger arm is hooked is cut out,
The plunger is always positioned in the first region by being pushed by the trigger arm in a state where the trigger lever rotates and the free end is hooked on the peripheral surface, and the trigger lever rotates. A driving machine characterized in that the free end is positioned in the second region by the trigger arm in a state of being hooked in the recess.

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