JP4206960B2 - Nailer safety device - Google Patents

Description

  According to the present invention, a nail supplied into an injection port formed in a nose portion is driven out from an injection port via a driver that is driven impactively by power such as compressed air. The present invention relates to a safety device for a nailing machine for aiming a hole which is guided into an opening hole such as a nail hole of a fixture member to stop a metal fitting for construction.

In wooden construction, it is formed into a shape adapted to the shape of the joint when joining structural materials such as pillars, girders and beams, or to reinforce the joints of these structural materials At the same time, many metal fittings for building in which a large number of nail holes are formed are used. These metal fittings are driven into a structure material such as a pillar by driving a nail into the many nail holes formed. A power nailing machine for driving nails supplied to a hollow injection port formed in a nose portion by a driver driven by compressed air or the like is used for nailing a metal fitting for building. in use. In a nailing machine in which a nail is driven into a nail hole of such a construction metal fitting, it is driven out from the injection port to the front side of the tip of the injection port that slide-guides a driver driven by compressed air. A nail guide member formed with a guide guide groove for guiding and guiding the nail in the direction of the tip of the injection port is installed, and the tip of the nail guide member is formed by cutting a tapered taper in the longitudinal direction and cutting it in the vertical direction. The tapered tip is inserted into the nail hole of the building bracket to position the injection port of the nailing machine, and the tip of the nail driven out from the injection port is formed on the rear side of the guide member. By guiding along the guide groove, the nail is guided into the nail hole of the architectural bracket and driven into the nail hole.
JP-A-8-52666

  In the nailing machine in which the nail supplied to the injection port of the nose portion is driven out by the driver as described above, the nail driven out from the injection port of the nose portion is prevented from being driven toward the rear side of the injection port. A ratchet mechanism is provided. This ratchet mechanism is pivotally biased by a spring so that the lower end portion is close to the direction of the guide guide groove of the nail guide member, and engages with the tip end portion of the nail that is driven out from the injection port of the nose portion. The tip of the nail is pressed into the guide guide groove formed on the rear side surface of the nail guide member, and the tip of the nail that is driven out from the injection port enters the nail hole of the architectural bracket along the guide guide groove of the nail guide member To be guided.

  In the prior art nail driver, a nail that is struck out from the injection port by the spring biasing force of the ratchet member is installed on the rear side of the tip of the nose portion so that the ratchet member is rotatable and pivotally biased by a spring. The tip of the nail is pressed into the guide guide groove formed in the nail guide member so that the tip of the nail is guided and guided along the guide guide groove of the nail guide member. Since the guide is guided into the nail hole of the metal fitting, the ratchet member is opened against the biasing force of the spring, for example, sand or a piece of material to be driven is caught between the ratchet member and the nail guide member. If it is held in the state position, the tip of the nail that is driven out from the injection port cannot be placed along the guide guide groove, so that the tip of the nail cannot enter the nail hole of the building bracket. , Nails for construction It is extremely dangerous to or bounce off to an unexpected direction against the surface of the ingredients.

  The present invention eliminates the above-mentioned conventional problems, and makes it impossible to drive the nailing machine when it becomes impossible to guide the tip of the nail that is driven out from the injection port into the nail hole of the building bracket. It is an object of the present invention to provide a nailing machine equipped with a safety device.

In order to solve the above problems, a safety device for a nailing machine according to the present invention includes a driver that is operated by a driving force such as compressed air and a nose portion formed with a hollow injection port that slidably guides the driver. And a contact member provided at the tip of the nose portion so as to be movable along the nose portion and operated to move by a reaction force pressed toward the material to be driven. In the safety device for a nail driver, the contact member is provided so that the nail supplied from the magazine into the injection port of the nose portion is struck and driven by the driver. The guide guide groove for guiding the tip of the nail driven out from the injection port is formed, and the tapered portion that can be inserted into the nail hole formed in the fixing member is formed at the tip. A nail guide member that is formed, and a ratchet member that is rotatably provided so as to engage with a nail punched out from the injection port and press and urge the tip of the nail into the guide guide groove. wherein the ratchet member, projects to the side of the nose portion by rotating to the open state position against the press biasing, and supplies and guides a nail of the magazine on the exit mouth of said nose portion An engagement portion that engages with a lower end of the nail supply guide to prevent the contact member from moving is provided .

According to the nail guide device of the present invention, the contact member provided so as to be movable along the nose portion is moved and the trigger lever is operated to be supplied into the injection port of the nose portion. In the safety device for a nail driver provided to strike and drive a nail by the driver, the contact member is formed with a guide guide groove for guiding the tip of the nail punched from the injection port and at the tip. A nail guide member formed with a tapered portion that can be inserted into a nail hole formed in the member to be fixed, and a nail driven out from the injection port to engage the leading end of the nail into the guide guide groove A ratchet member rotatably provided so as to be capable of being pressed and biased, and the ratchet member rotates to the open position against the pressing and biasing, thereby Projects to the side parts, and so engage the lower end of the nail supply guide to prevent movement of said contact member includes an engaging portion to disable the rotation operation of the trigger lever, the ratchet member and which When sand or a piece of material to be driven is sandwiched between the contact member that supports the ratchet member and the ratchet member remains open against the pressing force, the ratchet member rotates to the open state position. The engaging portion of the ratchet member protruding protrudes toward the nose portion. For this reason, the movement along the nose portion of the contact member is restricted by the engaging portion of the ratchet member and the nailing machine cannot be started, and the nail is not guided into the nail hole of the building bracket due to the malfunction of the ratchet member. It can be prevented in advance that it hits the surface of the building hardware and bounces back.

  The present invention has the purpose of making it impossible to drive the nail driver when it becomes impossible to guide the tip of the nail punched out from the injection port into the nail hole of the building bracket. The contact member is provided with a ratchet member that is pivotable and pivotally biased so as to engage and press the tip of the nail into the guide groove of the nail guide member, and the ratchet member resists the pivotal biasing force. Then, when the ratchet member is rotated to the open position, the sliding movement amount of the contact member is regulated by engaging the ratchet member and the nose portion, thereby preventing the nailing machine from being activated. More specific examples will be described below.

  1 and 2 show a part of a nailing machine 1 in which a safety device according to an embodiment of the present invention is implemented. As shown in FIG. 1, the main configuration of a nailing machine such as an impact drive mechanism is shown. A grip part 3 for an operator to grip and operate the nailing machine 1 is integrally formed on the rear side of the housing 2, and the grip part 3 is gripped at the base of the grip part 3. The trigger lever 4 is provided so that it can be operated with the finger of the hand. A nose portion 5 forming a hollow nail injection port is attached below the housing 2, and a contact member 6 protruding from the nose portion 5 in the distal direction of the injection port of the nose portion 5. Is provided to be movable along the nose portion 5. Further, a magazine 8 is connected to the rear side of the nose portion 5 and accommodates a connecting nail in which a number of nails are connected to each other via a nail supply guide 7.

  As shown in FIG. 2, the impact drive mechanism accommodated in the housing 2 includes an impact cylinder 9 disposed in the housing 2, an impact piston 10 slidably accommodated in the impact cylinder 9, and It comprises a driver 11 for hitting a nail coupled to the lower surface of the hitting piston 10. The nose portion 5 attached below the housing 2 is formed with an injection port 12 for launching and guiding a nail toward the driven material, and a driver 11 coupled to the striking piston 10 is connected to the nose portion 5. It is guided in the injection port 12 so as to be slidable. An opening for introducing the leading nail of the connecting nail into the injection port 12 is formed on the rear side of the injection port 12 of the nose portion 5 and is integrally connected to one side edge of the opening. A magazine 8 accommodating a connecting nail is connected to the rear end of the nail supply guide 7. Further, a nail supply mechanism 13 is formed along the nail supply guide 7, and the connection nail accommodated in the magazine 8 is supplied along the nail supply guide 7 by the nail supply mechanism 13, and the connection nail is connected. The first nail is sequentially supplied into the injection port 12 of the nose portion 5.

  A main valve 14 is disposed at the upper end of the striking cylinder 9, and the main valve 14 selectively connects the inside of the striking cylinder 9 between the air chamber 15 formed inside the grip portion 3 and the exhaust port. To do. When the main valve 14 connects the inside of the striking cylinder 9 to the air chamber 15, the compressed air in the air chamber 15 is introduced into the striking cylinder 9, and the striking piston 10 is driven by this compressed air and coupled to the striking piston 10. The driven driver 11 strikes the nail supplied into the injection port 12 and drives it out from the injection port 12. A trigger valve 16 for controlling the main valve 14 is disposed at the base portion of the grip portion 2, and the trigger valve 16 is activated by the operation of the trigger lever 4 that can be manually operated, so that the striking cylinder 9 is air-operated. The main valve 14 is operated so as to be selectively connected between the chamber 15 and the exhaust port.

  As shown in FIG. 3, at the tip of the nose portion 5, a contact is provided so as to protrude in the tip direction of the nose portion 5 so that it can be engaged with a material to be driven when the nail driver 1 is driven. A member 6 is movably provided along the injection port 12 of the nose portion 5. The contact member 17 is connected to a contact arm 17 having an upper end 18 disposed in the vicinity of the base of the trigger lever 4 so as to press the nose portion 5 of the nailing machine 1 against the workpiece. The contact member 6 is moved and moved along the nose portion 5 by the reaction force from the driven portion, thereby rotating the contact lever 19 in which the upper end portion 18 of the contact arm 17 is pivotally supported by the trigger lever 4. In addition, the trigger lever 4 is rotated by an operator, whereby the valve stem 16a of the trigger valve 16 is actuated to start the nail driver 1.

  As shown in FIG. 4, the contact member 6 is formed with a nail guide device 20 that guides and guides a nail driven by a driver 11 from an injection port 12 of the nose portion 5 toward a driven material. The nail guide device 20 is arranged on the front side of the injection port 12 so as to guide and guide the nail that is driven out from the injection port 12 of the nose part 5 toward the direction in which the injection port 12 formed in the nose part 5 is extended. The nail guide member 21 and the nail driven out from the injection port 12 of the nose portion 5 are prevented from being driven out from the opening portion opened to the rear side of the injection port 12 toward the rear side of the nose portion 5. The ratchet member 22 is provided on the rear side of the injection port 12.

  The nail guide member 21 is formed with a guide guide groove 23 for guiding and guiding a nail driven out from the injection port 12 of the nose portion 5 in the extending direction of the injection port on the rear side surface of the nail guide member 21. It is attached to the contact member 6 so as to be arranged coaxially with the five injection ports 12. Further, a tip end portion 24 having a convex shape is formed on the tip end side of the nail guide member 21, and the tip end portion 24 is half-cut in a longitudinal direction with a tapered taper shape so that it can be inserted into a nail hole of a building bracket. The tip 24 of the nail guide member 21 formed in a semi-taper taper shape is arranged so as to protrude further in the tip direction from the tip of the contact member 6. By fitting the tip portion 24 of the nail guide member 21 into the nail hole of the building bracket, the nose portion 5 is positioned with respect to the nail hole so that the tip of the nail driven out from the injection port 12 can be guided into the nail hole. Further, the contact member 6 is moved with respect to the nose portion 5 by pressing the nose portion 5 of the nailing machine toward the building bracket.

  The ratchet member 22 is disposed on the rear side of the injection port 12 so as to face the guide guide groove 23 of the nail guide member 21 and is rotatably supported by the contact member 6 by a rotation support shaft 25. The ratchet member 22 has an upper surface and a front surface that engage with the tip of a nail that is launched from the inside of the injection port 12 of the nose portion 5 toward the rear side of the injection port 12 to guide the tip of the nail forward. And a guide surface 27 formed in the shape of a conical surface for guiding the tip and shaft portion of the nail to the center position in the width direction. Further, the ratchet member 22 is pressed by a spring 29 interposed between the ratchet member 28 formed on the contact member 6 and the lower end portion of the guide surface 27 is guided by the guide guide of the nail guide member 21. The urging force is applied so as to approach the groove 23, and by this urging force, the shaft portion of the nail driven out from the injection port 12 of the nose portion 5 is pressed against the guide guide groove 23 of the nail guide member 21, The tip of the nail acts so as to be in close contact with the surface of the guide guide groove 23.

  The operation of guiding the nail N driven out from the injection port 12 by the nail guide device 20 into the nail hole H of the construction metal fitting M will be described below. The tip end portion 24 of the nail guide member 21 protruding in the tip direction of the contact member 6 is fitted into the nail hole H of the building bracket M, and in this state, the nose of the nail driver 1 The injection port 12 of the nose part 5 of the nailing machine 1 is positioned with respect to the nail hole H of the building metal M by pressing the part 5 against the building metal M. Thereafter, when the nail driver 1 is started, the nail supplied into the injection port 12 is driven out from the injection port 12 by the driver 11.

  As shown in FIG. 4, the nail N driven out by the driver 11 from the injection port 12 of the nose portion 5 is guided toward the front side by engaging the inclined portion 26 and the guide surface 27 of the ratchet member 22 at the tip portion. Then, the tip of the nail N is driven so as to follow the guide guide groove 23 of the nail guide member 21, and as a result, the tip of the nail N is guided into the nail hole H of the building bracket M and into the nail hole H. It is driven in. When the tip of the nail N is guided into the nail hole H and the nail shaft penetrates into the nail hole H, the tip 24 of the nail guide member 21 is driven by the nail N to be driven. It is pressed and pushed out from the nail hole H along the tapered shape of the outer shape of the front end portion 24, and the nail N is driven into the nail hole H of the building bracket M as shown in FIG.

  As shown in FIG. 6, the nose portion 5 of the nail driver 1 is moved with the tip 24 of the nail guide member 21 attached to the contact member 6 engaged with the nail hole H of the building metal M. By pressing in the direction of the workpiece, the contact arm 17 is moved upward with respect to the nose portion 5 via the contact member 6, and the base end side of the contact lever 17 is triggered by the upper end portion 18 of the contact arm 17. The distal end side of the contact lever 19 pivotally supported by the support lever 19 is rotated upward, and further, the trigger lever 4 is rotated by the operator's finger, whereby the proximal end side of the contact lever 19 is moved upward. 6, both ends of the contact lever 19 are moved upward by the movement of the contact arm 17 and the turning operation of the trigger lever 4, thereby causing the trigger valve 16 to move upward. Valve stem 16a is operated nailing machine 1 is adapted to be activated.

  As shown in FIG. 7, the engaging portion 30 is disposed on the rear upper end surface of the ratchet member 22 rotatably supported by the contact member 6 so as to face the lower end surface 7 a of the nail supply guide 7. The ratchet member 22 rotates in the counterclockwise direction around the rotation support shaft 25 and moves to the open position, whereby the engaging portion 30 protrudes upward. The engaging portion 30 protruding upward comes into contact with the lower end surface 7a of the nail supply guide 7 when the contact member 6 is moved upward to prevent the contact member 6 from moving to the top dead center position. I have to. As shown in FIG. 8, when the ratchet member 22 is rotated to the closed position by the urging force of the spring 29 and moved to the closed position, the engaging portion 30 is on the lower end surface 7 a side of the nail supply guide 7. Therefore, the contact member 6 is operated by pressing the nail driver 1 in the direction of the material to be driven with the tip 24 of the nail guide member 21 engaged with the nail hole H of the building metal M. Can be moved to the top dead center position with respect to the nose portion 5 and the tip end side of the contact lever 19 is rotated upward by the upper end portion 18 of the contact arm 17 connected to the contact member 6. The machine 1 can be activated.

  As shown in FIG. 9, the ratchet member 22, such as sand or a piece of material to be driven, enters the gap between the ratchet member 22 and the contact member 6 that rotatably supports the ratchet member 22. Is held in the open position rotated counterclockwise against the rotational biasing force of the spring 29, the engaging portion 30 protrudes upward where the lower end surface 7a of the nail supply guide 7 is located. The contact member 6 is moved to the nose portion by pressing the nail driver 1 in the direction of the driven material in a state where the tip 24 of the nail guide member 21 is engaged with the nail hole H of the building metal M. When the contact member 6 is moved to a position below the top dead center position by a predetermined distance a when operated so as to move with respect to 5, the lower end surface of the nail supply guide 7 7a contact member There regulating the moving to the top dead center position. For this reason, the upper end portion 18 of the contact arm 17 cannot move the tip end portion of the contact lever 19 pivotally supported by the trigger lever 4 to a predetermined position by a predetermined distance a. Even if the trigger lever 4 is rotated, the nailing machine 1 is not started.

  As described above, the ratchet member 22 is formed with the engaging portion 30 protruding upward in a state where the ratchet member 22 is rotated to the open state position, and the position where the ratchet member 22 is rotated to the open state position. In this state, the engaging portion 30 formed on the ratchet member 22 and the nail supply guide 7 provided behind the nose portion 5 are engaged to bring the contact member 6 to the top dead center position. Since the movement is prevented and the nail driver 1 is not activated, the ratchet member 22 is activated in a state in which the ratchet member 22 is malfunctioning, and the nail N is placed in the nail hole H of the building bracket M. The danger that the nail N rebounds from the surface of the construction metal fitting M without being guided can be prevented.

  10 and 11 show another embodiment of a mechanism for restricting the contact member 6 from moving to the top dead center position. In this embodiment, the contact member 6 extends upward to the upper end portion on the rear side of the ratchet member 22. An engaging convex portion 31 is formed as an engaging portion. In a state where the ratchet member 22 is rotated to the closed position in the direction around the hour hand by the rotation biasing force by the spring 29, the engagement convex portion 31 is disposed substantially in parallel with the moving direction of the contact member 6, and the ratchet member 22. The engaging projection 31 is arranged in a tilted state by rotating to an open position in the counterclockwise direction against the turning biasing force of the spring 29. When the ratchet member 22 is turned to the open state position on the lower end surface of the nail supply guide 7 and the engaging convex portion 31 is tilted, it engages with the engaging convex portion 31 and the contact member 6 An engagement edge portion 32 that prevents movement to the top dead center position is formed.

  As shown in FIG. 10, in a state in which the ratchet member 22 is rotated to the closed position by the rotation biasing force by the spring 29, the engagement convex portion 31 is arranged along the moving direction of the contact member 6. The contact member 6 is pressed against the nose portion 5 by pressing the nailing machine 1 in the direction of the driven material in a state where the tip 24 of the nail guide member 21 is engaged with the nail hole H of the building metal M. The engagement projection 31 moves upward along the side surface of the engagement edge 32 without engaging with the engagement edge 32 formed on the nail supply guide 7. The nailing machine 1 can be started by moving the member 6 to the top dead center position.

  As shown in FIG. 11, in the state where the ratchet member 22 is held at a position rotated in the counterclockwise direction against the rotational biasing force of the spring 29, the engagement convexity is caused by the rotation of the ratchet member 22. The nail driving machine 1 is pressed and operated in the direction of the driven material in a state in which the portion 31 is disposed in a tilted state and the tip 24 of the nail guide member 21 is engaged with the nail hole H of the building bracket M. Accordingly, when the contact member 6 is operated to move with respect to the nose portion 5, the engaging convex portion 31 arranged in the tilted state engages with the lower end surface of the engaging edge portion 32 of the nail supply guide 7. Thus, since the movement operation to the top dead center position of the contact member 6 is prevented, the nailing machine is not activated.

  According to the above-described embodiment, the engagement convex portion 31 formed on the ratchet member 22 is tilted with the rotation of the ratchet member 22 and is engaged with the engagement edge portion 32 of the nail supply guide 7 so as to contact the contact member. 6 is prevented from moving, so that the engagement protrusion 31 engages with the engagement edge 32 to increase the distance b at which the contact member 6 is prevented from moving in the top dead center direction. It becomes possible to increase the amount of operation of the contact lever 19 operated by the upper end portion 18 of the contact arm 17 operated via the contact member 6, and a more reliable operation is performed as a safety device. It becomes possible to make it.

  In addition, although it explained in full detail using the nail N in the said Example, this invention is not limited to this, For example, it replaced with the nail and formed the screw thread in the pin member for concrete placement, or a shaft part. A screw member may be used. Moreover, although it demonstrated using the construction metal fitting M as a to-be-fixed member member, it replaces with the construction metal fitting M, for example, the tile member in which a nail hole is formed, a tile-shaped member, etc. Can be used. In short, the present invention can be widely applied to a technique of driving a driving member such as a nail, a pin, or a screw into the driven member through an opening hole formed in the fixed member. Further, in the above embodiment, the description has been made using a nail driver using compressed air as a power source. However, the present invention can also be applied to a nail driver configured to drive a driver using combustion gas as a power source.

The side view which shows a part of nail driver which implemented the nail guide apparatus of this invention Vertical side view of the same nailing machine as in FIG. The fragmentary sectional view which shows the related mechanism for starting the nail driver of FIG. Longitudinal side view showing the operating state of driving a nail into a nail hole of a building bracket Longitudinal side view showing the operating state when the nail is driven into the nail hole of the building bracket Partial sectional view showing the same mechanism as FIG. 3 operated to activate the nail driver Sectional drawing which shows the principal part which comprises the safety device of the nail driver of FIG. Sectional drawing which shows the principal part which comprises the safety device of the state which started the nail driver Sectional view showing the safety device in a state where the nailer cannot be activated The fragmentary sectional view which shows the safety device which concerns on another Example of this invention. Partial sectional view showing the safety device of FIG. 10 in a state in which the nailer cannot be activated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nail driver 4 Trigger lever 5 Nose part 6 Contact member 7 Nail supply guide 12 Injection port 20 Nail guide device 21 Nail guide member 22 Ratchet member 23 Guide guide groove 24 Tip part 25 Rotation support shaft 29 Spring 30 Engagement part

Claims (1)

A driver that is operated by a driving force such as compressed air, a nose part in which a hollow injection port that guides the driver is slidable, and a tip of the nose part that is movable along the nose part is provided with a contact member that is moved operated by a reaction force that is pressed toward the struck member, and activated by the operation and moving operation and the trigger lever of the contact members is made, the nose of the magazine In the safety device of a nailing machine provided to strike and drive a nail supplied into an injection port of a part by the driver, the contact member guides a leading end portion of the nail that is launched from the injection port And a nail guide member formed with a tapered portion which can be inserted into a nail hole formed in the fixing member at the tip, and is ejected from the injection port. A ratchet member that is pivotably provided so as to engage with a nail and press and urge the tip of the nail to the guide guide groove, and the ratchet member resists the pressing force. and projecting to the side of the nose portion by rotating to the open state position, and engages a nail of the magazine to the nail supply guide the lower end of supplying the injection mouth guide of the nose portion of the contact member A safety device for a nailing machine, comprising an engaging portion for preventing movement .

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