JP4941001B2 - Staple driving driver - Google Patents

Description

  The present invention relates to a staple driving driver capable of effectively preventing a staple from buckling when the staple is driven out.

  In general, in a construction or indoor interior construction, a member is connected using staples, and various sizes of staples and a staple nailing machine have been developed according to applications. Along with this, the leg portions of the staples tend to be long, but along with this, there are many cases in which driving failure due to buckling of the staples occurs. Therefore, on the tip surface of the driver that strikes and strikes the staple, by forming three convex portions having substantially the same height, facing the central portion of the top end portion of the staple and the rounded surfaces of the bent portions at the left and right ends, A technique for preventing buckling has been proposed (see Patent Document 1).

According to this, since the front end surface of the driver presses both shoulders of the top end portion of the staple, both the leg portions of the staple do not penetrate into the driven material in a tapered state, and the occurrence of poor driving due to the buckling of the staple occurs. It can prevent well.
Japanese Patent No. 3355900

  However, when driving the staple, the nailing machine moves in the direction opposite to the driving direction by the reaction force when the driving piston of the nail driving machine is driven in the driving direction together with the driver. Specifically, the tip of the nose portion moves away from the driven material while the position of the tip of the nose portion is shifted forward, with the grip of the nail driver held by the operator as a fulcrum. At this time, the driver for driving the staples is also displaced forward, so that a phenomenon occurs that the staples are buckled out of the staples that are in the middle of being penetrated, or are clogged in the nailing machine. In particular, a staple having a long leg portion has a large driving resistance, and therefore a front shift is likely to occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a staple driving driver capable of solving the above-described problems and effectively preventing front deviation at the time of staple driving, thereby satisfactorily preventing staple buckling and clogging.

  In order to solve the above-mentioned problem, the staple driving driver of the invention according to claim 1 is driven by a striking mechanism provided in a nailing machine for driving out staples and strikes a staple in a nose portion provided at a tip. In the staple driving driver to be driven out, the front end surface of the driver is formed with three convex portions having substantially the same height, which are opposed to the center portion of the top end portion of the staple and the rounded surfaces of the bent portions at the left and right ends. A concave groove conforming to the cross-sectional shape of the top end portion of the staple is formed along the length direction of the front end surface.

  According to a second aspect of the present invention, in the first aspect, a taper having a front portion higher than the rear portion is formed in a concave portion between the central convex portion and the left and right convex portions formed on the front end surface of the driver. It is characterized by.

  According to a third aspect of the present invention, in the first or second aspect, a flat portion is formed between the concave groove on the front end surface of the driver and the rear end surface of the driver.

  According to the first aspect of the present invention, the three convex portions of the same height are formed at the central portion of the top end portion of the staple and the curved surfaces of the bent portions at the left and right ends. Since the front end surface presses both shoulders of the top end portion of the staple, both the leg portions of the staple do not penetrate into the driven material in a tapered state.

  In addition, since the concave groove conforming to the cross-sectional shape of the top end portion of the staple is formed along the length direction of the leading end surface, a force that causes the nose portion to float and shift forward due to the driving reaction force at the same time as driving is provided. Although acting, the top end portion of the staple is engaged with the concave groove on the front end surface of the driver so as not to be misaligned. Since the top end portion of the staple is held in the concave groove and does not come off the driver, the driver keeps driving until the staple has completely penetrated the material to be driven.

  Accordingly, it is possible to satisfactorily prevent staple driving failure due to buckling or clogging.

  According to the second aspect of the present invention, since the taper having the front portion higher than the rear portion is formed in the concave portion between the central convex portion and the left and right convex portions of the driver front end surface, the driver causes a front shift when driven. Even if it does so, both the shoulder parts of the staple which is in contact with the above-mentioned taper surface will become resistance at the time of a driver moving forward, and will suppress front gap. Therefore, in combination with the effect of the concave groove, it is possible to more effectively prevent staple driving failure due to buckling or clogging.

  According to the third aspect of the present invention, since the flat portion is formed between the groove on the front end surface of the driver and the rear end surface of the driver, even if wear occurs on the front end surface of the driver due to repeated driving. Since the concave groove can retain its shape as long as the flat portion is not worn, it can maintain the buckling / clogging prevention function and the suppression of the front displacement for a long time.

  FIG. 1 is a longitudinal sectional view of a main part of a nailing machine for stapling according to the present invention. The nailing machine strikes staples supplied from the magazine 3 to the nose portion 4 at the lower part of the nailing machine using compressed air stored in an air chamber 2 provided inside the nailing machine body 1. It is launched by the mechanism. The striking mechanism slidably houses the striking piston 6 in the striking cylinder 5, and the compressed air in the air chamber 2 is supplied into the striking cylinder 5 in accordance with the operation of the trigger lever 7. The driving driver 8 is driven to strike the staples. The driving driver 8 is integrally coupled to the striking piston 6.

  In the nose portion 4, a driver 8 is slidably guided and a driving path 10 for driving out staples is formed. A rear side of the driving path 10 is open to a nail supply path of the magazine 3. Connected staples (not shown) are loaded in the magazine 3, and staple pushers (not shown) that are pressed and supplied to the nose portion 4 sequentially from the top one are arranged.

  Although not described, the nailing machine is provided with a safety device that makes the operation of the trigger lever 7 effective only when the tip of the nose portion 4 is pressed against the material to be driven.

  Then, when the staple is supplied into the nose portion 4 and the trigger lever 7 is operated in a state where the safety device is released, the trigger valve 11 is activated and the main valve 12 moves the air chamber 2 against the striking cylinder 5. It moves from the closed lower position (the left position in FIG. 1) to the upper position on the right side in FIG. 1 and operates to open, whereby compressed air in the air chamber 2 is supplied into the striking cylinder 5, so that the striking mechanism is In operation, the driver 8 can strike the staple in the nose portion 4 and drive it toward the material to be driven.

  Next, the driving driver 8 is formed in a long and thin plate shape, with the front center portion protruding slightly and the cross section being formed in a convex shape. As shown in FIG. 2, a concave portion 13 is cut out symmetrically on the front end surface of the driver 8, and convex portions 14 and 15 are formed at three locations on the center and both left and right ends. The central convex portion 14 is opposed to the central portion of the top end portion 16 of the staple S, and the left and right convex portions 15 are formed so as to be opposed to the round surfaces of the shoulder portions 17 at the left and right ends of the staple S. The convex portions 14 and 15 have substantially the same height. The width of the left and right convex portions 15 is narrower than the distance between the leg portions 18 of the staple S, and does not contact the upper shoulder portions 17 of the both leg portions 18 of the staple S. Further, the interval between the left and right convex portions 15 is formed to be slightly narrower than the entire width of the staple S. When the central convex portion 14 is in contact with the middle of the top end portion 16 of the staple S, the left and right convex portions 15 are formed as staples. The shoulder portion 17 of S is not in contact.

  Further, as shown in FIGS. 3 and 4, a concave groove 20 is formed along the length direction of the leading end surface of the staple S. The concave groove 20 is formed to fit with the top end portion 16 in accordance with the cross-sectional shape of the top end portion 16 of the staple S. A flat portion 21 is formed between the groove 20 and the rear end surface of the driver 8.

  Next, the operation of the driver 8 having the above configuration will be described. When the trigger lever 7 is operated to activate the nail driver and drive the striking piston 6, the staple S in the nose portion 4 is struck, as shown in FIG. Hits the top end 16 of the staple S. The impact applied to the top end portion 16 acts as stress in the expanding direction on both legs 18 of the staple S, and both legs 18 hit the material to be driven in a parallel state or slightly expanded state. Penetration into the material.

  Then, since the penetration resistance acts when both legs 18 penetrate the material to be driven, the intermediate portion of the top end portion 16 of the staple S pressed by the driver 8 is dented and deformed toward the driving side as shown in FIG. Therefore, since the left and right convex portions 15 on the front end surface of the driver 8 abut on the shoulder portion 17 of the staple S, the shoulder portion 17 is pressed down and deformation of the intermediate portion is restricted. Finally, the left and right convex portions 15 cause the both leg portions 18 to completely penetrate the workpiece and the driving is completed.

  Further, a force that shifts forward acts on the nose portion 4 of the nail driver due to the driving reaction force at the time of driving, but the top end portion 16 of the staple S is at the tip end surface of the driver 8 as shown in FIG. Since the concave groove 20 is engaged and held, the front displacement is prevented, and the driver 8 continues to drive until the staple S penetrates into the driven material.

  As described above, the left and right convex portions 15 and the concave grooves 20 on the front end surface of the driver 8 can satisfactorily prevent the staple S from being poorly driven due to buckling or clogging.

  Further, since the flat portion 21 is formed between the concave groove 20 on the front end surface of the driver 8 and the rear end surface of the driver 8, even if wear occurs on the front end surface of the driver 8 due to repeated driving, the concave groove 20 can maintain its shape as long as the flat portion 21 is not worn away, so that it can maintain the buckling / clogging prevention function and the suppression of forward displacement for a long time.

  In addition, as an effect with respect to wear, the dimension in the width direction of the flat portion is desirably 0.3 mm or more.

  Further, as shown in FIGS. 6 and 7A and 7B, the concave portion 13 between the central convex portion 14 and the left and right convex portions 15 formed on the front end surface of the driver 8 is formed from the rear portion. However, it is preferable to form it as a tapered surface so that the front part is high.

  According to the taper configuration, even if the driver 8 tries to cause a front shift in the direction of the dotted line in FIG. 7B when driven, both the shoulder portions 17 of the staple S contacting the tapered surface 13 move forward. It becomes resistance at the time of doing, and suppresses a front gap. Therefore, in combination with the effect of the concave groove 20, it is possible to prevent the staple S from being poorly driven due to buckling or clogging.

  In addition, you may form the recessed part 13 as a taper surface like FIG.

The longitudinal cross-sectional view of the principal part of the nail driver which concerns on this invention Front view of the main part of the nose part Perspective view of the tip of the driver Driver side view Front view of the main part of the nose showing the driver in the driven state The perspective view which shows the other aspect of the front end surface of a driver (A) (b) is a front view and a longitudinal sectional view of the main part of the driver. The perspective view which shows the other aspect of the front end surface of a driver

Explanation of symbols

S Staple 8 Driver for driving 13 Concave part 14, 15 Convex part 16 Top end part 20 Concave groove

Claims (3)

  In a staple driving driver driven by a striking mechanism provided inside a nailing machine for driving staples and striking and driving staples in a nose portion provided at the tip, the top end portion of the staple is placed on the tip surface of the driver. Convex grooves corresponding to the cross-sectional shape of the top end portion of the staple are formed along the length direction of the front end surface along with the three convex portions having the same height, which are opposed to the central portion and the shoulder portions on both the left and right ends. A staple driving driver characterized by being formed.   The staple driving method according to claim 1, wherein a taper having a front portion higher than a rear portion is formed in a concave portion between a central convex portion and a left and right convex portion formed on a front end surface of the driver. Driver.   The staple driving driver according to claim 1, wherein a flat portion is formed between the concave groove on the front end surface of the driver and the rear end surface of the driver.

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