JP2011104707A - Device for extracting nail and method for extracting nail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop and provide a device for extracting a nail being capable of easily extracting the nail, being safe and inexpensive, having a simple configuration, and being excellent in workability and durability. <P>SOLUTION: The device for extracting the nail includes a cylindrical body which has a screw guide having both ends that are opened and a screw at an internal circumference, a screw that is screwed to the screw guide at an outer circumference, and a closed part with one end closed. The device for extracting the nail further has a spindle mounted at a power source such as an impact wrench at the center part of the closed part, a hole for taking out the nail at a central part, a cylindrical blade for cutting at a tip end at the other end, and a cutting nail extracting tool with a fixed screw blade for extracting the nail having a hole with a diameter smaller than that of the head of the nail at a center part inside the blade. The device for extracting the nail comprises a feed screw fixed concentrically with a gear having a hole at the center part at the upper end of the tool and having the nail extracting tool fixed to a spindle part having a cavity part at the upper end of the gear. The device for extracting the nail is used by a frame carpenter or the like and extracts the nail driven to wood such as a form panel. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

    The present invention relates to a nail extraction device and a nail extraction method for extracting a nail driven into a form panel used for a mold carpenter or the like.

    The conventional nail removal tool takes the time and effort to hook the nail head with a hand tool, and pulls it out by applying the lever principle. There is a problem in workability, safety, and economy, such as work efficiency decreasing with the passage of time.

    In addition, the nail removal devices that have been filed so far are air-type nail removal tools that have excellent practicality. However, there are conditions for using them, and the tip of the nail must be pulled out to the back side. In addition, since the extraction work from the back side is an essential condition, it cannot be said to be a perfect device.

    Therefore, it is desirable to develop a nail extraction device that allows anyone to easily pull out a nail, even if the head of the nail does not come out or the tip of the nail does not come out on the back side. ing.

Therefore, for reference, patent documents of nail extraction devices that have been filed so far are introduced (see Patent Documents 1 to 3).
JP 2004-050396 A JP 2006-075915 JP2009-184052

    Therefore, in order to solve the above-mentioned problems, the present invention makes it easy for anyone even if the head of the nail does not come out of the surface of the wood or the tip of the nail does not come out on the back side of the wood. The object is to develop and provide a nail extraction device that can extract a nail, is safe, has a simple structure, is inexpensive, and has excellent workability and durability.

    As means for solving this problem, a cylinder having a screw guide that has both ends open and has a screw on the inner periphery, a screw that engages with the screw guide on the outer periphery, and a closed portion that closes one end. A support shaft that is attached to a power source such as an impact wrench is provided at the center of the closed part, a nail removal hole is provided at the center, and a tip is cut at the other end. A cutting nail removal tool provided with a screw blade for nail extraction having a hole with a diameter smaller than the head of the nail at the center is provided in the inside of the blade, and is provided at the upper end of the tool. Is fixed concentrically with the gear having a hole in the center, and the upper end of the gear consists of a support shaft having a hollow portion and a feed screw provided with a fixed cutting nail punching tool. , Which removes nails driven into wood such as formwork panels That.

    As an effect of the present invention, there is provided a cylindrical body having a screw guide having both ends opened, a screw guide having a screw on the inner periphery, a screw threadedly engaged with the screw guide on the outer periphery, and a closed portion having one end closed. A support shaft to be attached to a power source such as an impact wrench is provided in the central portion of the closed portion, a nail removal hole is provided in the central portion, and a cutting cylindrical blade is provided at the tip of the other end portion. A cutting nail extraction tool is provided inside the blade portion, with a screw blade for nail extraction having a hole smaller in diameter than the head of the nail at the center, and provided at the center of the upper end of the tool. Concentrically fixed to the gear having a hole, and the upper end of the gear is composed of a support shaft having a hollow portion and a feed screw provided with a fixed nail removal tool. By pulling out the nail that was driven into the wood, the head of the nail will come out Even if it is not, or even if the tip of the nail does not come out to the back side, anyone can easily pull out the nail, and it is safe, has a simple structure, is inexpensive, and is easy to work and durable It has extremely beneficial effects such as excellent resistance.

One Example of this invention is shown, (A) is a top view of a guide screw, (B) is front sectional drawing, (C) is a bottom view. 1A is a plan view of a feed screw, FIG. 1B is a partially cutaway sectional view in front view, and FIG. One Example of this invention is shown, (A) is a front view, (B) is an aa arrow directional cross-sectional view of FIG. 3 (A). One Example of this invention is shown, (A) is front sectional drawing of a guide flange, (B) is a top view. 1 shows an embodiment of the present invention, in which (A) is a plan view of a bearing bushing, and (B) is a side sectional view. 1A is a plan view of a ratchet type cutting nail punching tool, FIG. 1B is a partially cutaway front view, and FIG. An embodiment of the present invention is shown, in which (A) is a plan view of a pole and (B) is a front view. One Example of this invention is shown, (A) is a top view of a plunger, (B) is a front view. One Example of this invention is shown, (A) is a top view of a compression coil spring, (B) is a front view. One Example of this invention is shown, (A) is a top view of a set screw, (B) is a front view. 1 shows an embodiment of the present invention, in which (A) is a plan view of a nail extraction device, and (B) is an assembled sectional view in front view. 1A and 1B are cross-sectional views of a ratchet mechanism portion when a ratchet mechanism portion is drilled, and FIG. 1B is a cross-sectional view of the ratchet mechanism portion when a nail is pulled out. The usage example of this invention is shown and the nail extraction work procedure figure and the alignment procedure figure are shown.

    As a form for carrying out the present invention, a screw guide (1) having both ends opened and having a screw on the inner periphery, and a closed portion having a screw that engages with the screw guide on the outer periphery and closing one end A support shaft (2b) to be attached to a power source such as an impact wrench (IW) is provided at the center of the closed portion, and a nail (N) extraction hole (2d) is provided at the center. 2d), and the other end portion has a cutting cylindrical blade portion (6b) at the tip, and the inside of the blade portion (6b) has a hole having a smaller diameter than the head of the nail at the center portion. A cutting nail removal tool (6) provided by fixing a nail extraction screw blade (6c) having a center is provided, and is fixed concentrically with a gear (6a) having a hole in the center at the upper end of the tool, and the gear A cutting nail punching tool in which the upper end portion of (6a) is fixed to a spindle portion (6d) having a hollow portion (6d ′). A nail extraction device comprising a feed screw (2) provided with (6) and used for mold carpenters and the like, and extracting nails (N) driven into wood such as a mold panel (MF) Composed.

    Therefore, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 12. First, FIGS. 1A and 1B show a guide screw, and the outer diameter of the cylindrical portion is about φ38 mm × the height is about 100 mm. The base portion (1b) is formed with an outer diameter of about 48 mm × height of about 5 mm, and an inner diameter of 28 mm × valley diameter of 32 mm × pitch of 4 mm for screwing the feed screw (2) at the center of the inner surface. The right trapezoidal female screw (1a) is provided through, and the back surface of the base portion (1b) is subjected to knurling (knurling) for preventing slipping.

    2A, 2B, and 2C show the feed screw (2), which fits the right trapezoidal female thread (1a) of the screw guide (1) on the entire outer surface of the substantially cylindrical main body (2 '). And a rotation support shaft (2b) for connecting to an impact wrench (IW) with a socket (S) at the center of the upper end of the substantially cylindrical body (2 '). In addition, a hollow hole (2c) having an inner diameter of about 20 mm for taking out the nail (N) extracted inside the center of the substantially cylindrical main body (2 '), and the width on either the front and rear or the left and right of the upper outer periphery A nail (N) take-out hole (2d) (2d) of about 10 mm × length of about 65 mm is provided, and a ratchet type cutting nail removal tool (6) for preventing right rotation during pulling is screwed into the center of the lower end. The inner structure of this ratchet mechanism is shown in FIG. ) And FIGS. 12 (A) and 12 (B), the rotation direction of the gear (6a) of the cutting nail removal tool (6) is restricted, and it is rotated to the right by mistake to rotate the nail head to the screw The feed screw (2) and the ratchet ring (3) are secured by the guide flange (4) and four socket bolts (SB), respectively, and the ratchet ring is used when drilling the outer periphery of the nail. The position of the four poles (7) incorporated in the pole rotation shaft (3b) (3b) (3b) (3b) of (3) is the bottom surface of the plunger (8) by the pressing force of the compression coil spring (9). Or, since the R chamfered portion (8a) presses the side plate portion of the pole (7), and the tip portion (7b) of the pole bites into the bottom of the gear (6a), the feed screw (2) is rotated clockwise. Ratchet ring (3) and The cutting nail removal tool (6) simultaneously rotates right.

    However, when pulling out the nail, the rotation direction of the impact wrench (IW) with socket is switched to the left rotation, so when the feed screw (2) is rotated counterclockwise, the ratchet ring (3) simultaneously rotates counterclockwise, but the tip of the pole (7b) is disengaged from the trough of the gear (6a) of the cutting nail removal tool (6), so the cutting nail removal tool (6) does not rotate and only the feed screw (2) is raised, so the nail (N) is It can be pulled out smoothly without detaching from the screw blade (6c).

    Next, the bushing (5) will be described. As shown in FIGS. 11 (A) and 11 (B), the bushing is inserted into the tip shaft portion of the feed screw, and the support shaft portion of the ratchet type cutting nail removal tool (6). (6d) is locked to support the radial radial load, and the vertical thrust load applied during cutting is received by the flange surface of the bushing.

    Next, the assembly procedure of the device (S) will be described. First, four poles (7), (7), (7) on the pole rotation shafts (3b) (3b) (3b) (3b) of the ratchet ring. The rotating shaft portions (7a), (7a), (7a), and (7a) of (7) are respectively inserted, and the plunger (8) is inserted into the plunger insertion holes (3c), (3c), (3c), and (3c). ) (8) (8) (8) and compression coil springs (9) (9) (9) (9) are inserted, and the spring force is adjusted with set screws (10) (10) (10) (10). While fixing. Then, the fitting portion (5a) of the bearing bushing (5) is fitted into the bearing bushing fitting hole (2e) provided at the center of the tip of the feed screw (2), and the fitted bearing bushing (5) is inserted. To support the support shaft portion (6d) of the ratchet type cutting nail punching tool (6) in the bearing hole (5c) portion and to expand the four poles previously incorporated in the ratchet ring (3). The ratchet type cutting nail removal tool (6) is rotated counterclockwise while the ratchet ring (3) is fitted into the center of the ratchet type cutting nail extraction tool (6), and the cutting blade part (6b) of the ratchet type cutting nail extraction tool (6) is fitted. The guide hole (4c) portion of the guide flange (4) is inserted, and further, locking members (SB) such as four socket bolts are locked and fixed to the locking hole (4b) portion.

    Next, the nail extraction method of the present invention will be described. When the nail (N) is extracted, the center of the cutting edge of the cutting nail extraction tool (6) provided at the tip of the apparatus is placed on wood (MF) such as a mold. Installed on the head of the nail (N) that has been driven in, cutting the outer periphery of the head of the nail (N) while rotating the feed screw (2) connected to the impact wrench (IW) with socket (S) to the right While rotating the blade edge of the screw blade (6c) simultaneously, hook the nail head and pull it out. When the nail head reaches the upper surface of the screw blade (6c) completely, switch the impact wrench to the left rotation. The feed screw is rotated counterclockwise to raise, and the nail (N) is taken out from the take-out holes (2d) and (2d) of the feed screw (2).

    Next, the work procedure at the time of removing the nail will be described with reference to FIG. 13. First, the socket part of the impact wrench (IW) is attached to the rotating support shaft (n) of the nail extraction device (S) with one hand (HA). 2b) and firmly fix the screw guide (1) with the other hand, and align the screw blade (6c) tip inlet of the left cutting nail removal tool (6) with the head of the nail (N). While holding down, while cutting the cutting blade (6b) clockwise with an impact wrench (IW) and cutting until the tip of the feed screw (2) reaches the surface of the wood (MF), the head of the nail (N) The part is pulled out while following the spiral shape of the screw blade (6c) and reaches the rear end of the screw blade (6c). Then, this time, the impact wrench (IW) is switched to the left rotation, the feed screw (2) is retracted, and the nail (N) is completely pulled out until the tip of the nail (N) comes out of the surface of the wood (MF).

    When the nail (N) is completely removed, the nail extraction device (S) is tilted sideways, and the nail (N) is removed from the extraction hole (2d) to complete. By repeating this operation, a plurality of nails can be extracted in a short time.

    It should be noted that a feed stopper for preventing dropout may be newly provided at the rear end of the screw guide (1) of the apparatus (S) so that the feed screw (2) does not fall off accidentally when the feed screw (2) is retracted. good.

    Furthermore, when the head of the nail is pulled out from the wood (MF) (when the dimension between the cutting blade and the screw blade is larger), it is possible to remove the nail without damaging the surface of the wood (MF). .

    The nail extraction device and nail extraction method according to the present invention allow anyone to easily remove a nail even if the head of the nail is not pulled out or the tip of the nail is not pulled out to the back side of the wood. Because it is possible, safe, simple in structure, inexpensive, and has excellent workability and durability, it can be used industrially in that it contributes to civil engineering and construction related markets such as many carpenters. Have.

DESCRIPTION OF SYMBOLS 1 Screw guide 1a Screw bottom 1b Base part 2 Feed screw 2 'Substantially cylindrical main body 2a Screw thread 2b Rotating spindle 2c Hollow hole part 2d Nail taking-out hole 2e Bearing bushing fitting hole 2f Socket bolt locking hole 3 Ratchet ring 3a Ratchet insertion hole 3b Pole rotation shaft 3c Plunger insertion hole 3c 'Screw hole (for set screw)
3d Socket bolt through hole 4 Guide flange 4a Thrust receiving surface 4b Socket bolt locking hole 4c Guide hole 5 Bearing bushing 5a Fitting portion 5b Gutter 5c Bearing hole 6 Ratchet type cutting nail removal tool 6a Gear 6b Cutting blade 6c Nail Extracting screw blade 6d Support shaft 6d 'Hollow part (for removing nails)
7 Pole 7a Rotating shaft 7b Anti-rotation tooth tip 8 Plunger 8a R Chamfer 9 Compression coil spring 10 Set screw 10a Spring force adjusting groove d1 Nail hole d2 Cutting blade inner diameter HA Hand S Nail removal device SB Locking member such as socket bolt SO Impact socket wrench IW Impact wrench MF Wood such as formwork N Nail

Claims (2)

    A cylindrical body having a screw guide (1) having both ends open and having a screw on the inner periphery, and a screw having a screw threadedly engaged with the screw guide on the outer periphery and having a closed portion closed at one end. A support shaft (2b) to be attached to a power source such as an impact wrench (IW) is provided at the center of the part, a hole (2d, 2d) for taking out a nail (N) is provided at the center, and the other end The part has a cutting cylindrical blade (6b) at the tip, and a screw blade (6c) for removing a nail having a hole having a diameter smaller than the head of the nail at the center in the blade (6b). A cutting nail punching tool (6) is provided, fixed at the upper end of the tool concentrically with the gear (6a) having a hole at the center, and the upper end of the gear (6a) is a hollow portion ( 6d ') and a feed screw (2) provided with a fixed cutting nail removal tool (6) ), And used for formwork carpenters and the like, and is used to remove nails (N) driven into wood such as formwork panels (MF). The feed screw (2) is cut into a mold panel (MF) or the like into a small-diameter hole of the screw blade (6c) provided at the approximate center of the cutting blade (6b) at the tip of the cutting nail removal tool (6). The nail (N) head is surrounded, the impact wrench (IW) is rotated, the outer periphery of the nail (N) head is cut, and the screw blade (6c) is simultaneously rotated to rotate the nail head. When the head of the nail completely reaches the upper surface of the screw blade (6c), the impact wrench (IW) is switched to reverse, and the feed screw (2) is rotated to raise the nail. A method for extracting a nail, characterized in that (N) is taken out from the take-out holes (2d, 2d) of the feed screw (2).

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