JP2012152873A - Attachment, screw fastening machine having the same, and method for fixing gypsum board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment, a screw fastening machine having the same, and a method for fixing a gypsum board wherein the screw fastening machine can be easily held at an appropriate position or in an appropriate attitude.SOLUTION: The attachment includes a locked part 11 locked at a top of a contact arm 9, and a flanged board holding part 13 having a flat contact surface 12 perpendicular to an eject direction of a screw ejected from the contact arm 9.

Description

  The present invention relates to an attachment attached to a tip of a contact arm provided in a screwing machine, a screwing machine provided with the attachment, and a fixing method of a gypsum board.

  Conventionally, as one of the methods for constructing the ceiling of a building such as a house, there is a method of screwing a gypsum board to the ceiling base material (field edge) and then gluing a vinyl cloth as a finishing material to this gypsum board. When screwing a board, a screwing machine that normally uses the pressure of high-pressure air is used.

  The gypsum board may be screwed alone without an auxiliary worker. In this case, since the screwing operation is performed while holding the heavy gypsum board in an unstable posture, the position and posture of the screwing machine are kept in an appropriate state, and the screw axial direction is perpendicular to the gypsum board. Thus, it is difficult to securely screw onto the ceiling base material, and it is often necessary to correct the position and orientation of the screwing machine or re-screw the screw. Moreover, when screwing the end part of the gypsum board, the soft and brittle gypsum board may be damaged.

  In Patent Document 1, there is a description of an attachment of a portable power drive tool provided with a front end surface that comes into contact with a gypsum board. It is difficult to stabilize the position and posture of the drive tool.

JP-A-2005-224907

  An object of the present invention is to provide an attachment that easily maintains the position and posture of a screwing machine in an appropriate state, a screwing machine including the attachment, and a fixing method for a gypsum board.

The present invention is used when fixing a board to a ceiling base material by screwing, and is provided in a screwing machine having a mechanism for driving a screw into a ceiling base material using the pressure of high-pressure air and tightening the screw. An attachment attached to the contact arm,
A locking portion locked to the tip of the contact arm;
A bowl-shaped board holding portion having a flat contact surface perpendicular to the injection direction of the screw injected from the contact arm;
It is characterized by providing.

Moreover, this invention is a screwing machine provided with the attachment of Claim 1.

Further, the present invention is a method for fixing a gypsum board to a ceiling base material using the screwing machine according to claim 2,
Lifting the gypsum board, aligning it, aligning the gypsum board with the ceiling base material, and supporting the gypsum board with one hand,
Hold the screwing machine with the other hand, bring the contact surface of the attachment into contact with the specified screwing position of the gypsum board and push the gypsum board up through the screwing machine to adhere the gypsum board to the ceiling base material. A second step of
A third step of screwing the gypsum board to the ceiling base material by pulling the trigger of the screwing machine while keeping the gypsum board and the ceiling base material in close contact with each other;
It is characterized by providing.

  The attachment includes a bowl-shaped board holding portion having a flat contact surface that is perpendicular to the screw injection direction. By attaching such an attachment to the screwing machine and bringing the abutment surface into contact with the screwing position of the board, it becomes easier to keep the position and posture of the screwing machine in an appropriate state, and the board can be screwed efficiently. I can work. Further, since the screw can be surely driven perpendicular to the board, even if the board is a soft and brittle gypsum board, it is possible to suppress the destruction of the gypsum board when the end portion is screwed.

  In general, gypsum board is soft and dents are likely to be formed by pressure. When finishing gypsum board with a thin vinyl cloth, even if the dents are slight, they are horizontal. Shading may occur when light from a lighting fixture or the like hits from the direction. It is difficult to repair such a slight dent by putty treatment or the like, and it is necessary to replace the gypsum board. On the other hand, when screwing using an attachment having a flat and flat contact surface with respect to the screw injection direction as in the present invention, the contact surface when screwing the gypsum board to the ceiling base material Since the pressure is dispersed even when pressed against the gypsum board, the depression of the gypsum board can be suppressed, and the above-described shadow problem is unlikely to occur.

  Normally, when the ceiling base material is made of a material such as steel that is extremely hard compared to gypsum board, it penetrates by rotating the screw at high speed with a strong torque, and the penetration depth is controlled by the reaction force at that time. Working efficiency is improved by using a screwing machine. At this time, the screw penetrates the ceiling base material by a predetermined depth, and the operation of the screwing machine is automatically terminated when the reaction force reaches a predetermined torque value. However, when working by a single worker, it is difficult to keep the heavy gypsum board in close contact with the ceiling base material. In comparison, the gypsum board that is extremely soft is lost due to the screw rotating at high speed, and it is drawn close to the ceiling base material side without sticking to it (only the screw penetrates the ceiling base material to the specified depth, so the head is plasterboard) Since the operation of the screwing machine is completed, a flat ceiling surface is not formed.

  On the other hand, in the gypsum board fixing method of the present invention, the abutment surface of the attachment included in the screwing machine that supports the gypsum board with one hand and is held by the other hand is fixed to the gypsum board with a predetermined screw. With the gypsum board pushed up through the screwing machine in contact with the position, with the back side of the gypsum board in close contact with the bottom surface of the ceiling base material, pull the trigger of the screwing machine to screw it into the ceiling base material Stop. Accordingly, the gypsum board can be screwed in a state where the gypsum board is securely adhered to the ceiling base material, so that a flat ceiling surface can be formed.

  According to the present invention, the position and posture of the screwing machine can be easily maintained in an appropriate state.

It is a front view of the screwing machine provided with the attachment concerning the present invention. (A) is a perspective view of an attachment, (b) is a front view of an attachment. It is sectional drawing which shows the fixing method of the gypsum board which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an attachment according to the present invention, a screwing machine including the attachment, and a gypsum board fixing method will be described in detail with reference to the drawings.

  The screwing machine 1 shown in FIG. 1 enables a gypsum board to be screwed to a very hard ceiling base material compared to a gypsum board such as a steel material.

  The main structure itself of the screwing machine 1 shown in FIG. 1 is well known. Schematically explaining the configuration of the screwing machine 1, the screwing machine 1 is integrally formed with a grip part 2 to be gripped by a hand and a housing 3 having a cylinder inside, and a rear part of the housing 3 has air. A valve unit 4 is provided. Inside the housing 3 is formed a cylinder chamber which is connected to an air valve mechanism (not shown) provided in the air valve portion 4 and in which compressed air is introduced and exhausted.

  An air plug 5 for connecting an air hose is provided at the bottom of the grip portion 2. An air passage (not shown) for sending compressed air sent from the air hose to the air valve mechanism is formed inside the grip portion 2, and the trigger 6 is placed on the grip portion 2 side in the air passage. A trigger valve (not shown) is provided for connecting the air plug 5 and the air valve mechanism and drawing compressed air into the cylinder chamber.

  The air valve mechanism introduces compressed air via an air passage formed in the grip portion 2 and exhausts air in the cylinder chamber to the atmosphere. A cylinder head of a cylinder chamber is connected to the air valve mechanism, and an air supply passage and an exhaust passage of the air valve mechanism are formed in the cylinder head.

  Inside the cylinder, a striking piston (not shown) that moves back and forth in the direction of the center axis of the cylinder by the introduced compressed air is built-in. A round bar driver is attached.

  A nose portion 7 forming a hollow screw injection passage (not shown) is attached to the distal end portion of the housing 3, and the screwdriver of the nose portion 7 that slides in the screw injection passage of the nose portion 7 is attached to the driver. An opening (not shown) is formed in the connection portion of the screw supply guide (not shown) on the side surface of the injection passage, and the screw is supplied from the screw supply guide to the opening every time the driver drives a screw. It is supplied one by one.

  The screw sent from the screw supply guide is sent into the screw injection passage from the opening. The screw supply guide is provided with a screw supply mechanism (not shown) that sends out the screw every time the driver reciprocates. The screw supply mechanism is wound in a roll shape and arranged in a strip shape in the vicinity of the screw supply mechanism. A magazine portion 8 is provided for storing the connected screws.

  The connecting screws wound in a roll shape in the magazine portion 8 are sequentially supplied one by one into the screw injection passage of the nose portion 7 by the feeding operation of the screw supply mechanism.

  A contact arm 9 is attached to the nose portion 7. The contact arm 9 slidably attached to the nose portion 7 has a hollow shape and has a screw passage 16 through which the screw 20 passes (see FIG. 2). The contact arm 9 retreats to the grip portion 2 side when an attachment 10 to be described later is pressed against a gypsum board or wood, and allows the screwing of the driver by pulling in the trigger 6. That is, the screwing machine 1 connects the air passage of the grip part 2 and the air valve mechanism by pulling the trigger 6 toward the grip part 2 and retreating the contact arm 9 toward the grip part 2 side, and compresses it. Air is supplied into the cylinder chamber. A detachable attachment 10 is attached to the distal end side of the contact arm 9.

  As shown in FIG. 2, the attachment 10 has a locking portion 11 that is locked to the tip of the contact arm 9 and a board holding portion 13 that is provided at the tip of the locking portion 11. The locking portion 11 has a cap shape corresponding to the shape of the tip end portion of the contact arm 9, and is provided with a pair of locking pieces 11a facing each other. Each locking piece 11a is formed with a locking hole 11b juxtaposed. On the other hand, a locking projection 17 that fits into the locking hole 11 b of the attachment 10 is provided on the side surface near the tip of the contact arm 9. The attachment 10 is fitted to the tip of the contact arm 9, and the locking projection 17 of the contact arm 9 is fitted into the locking hole 11 b, so that the state of being attached to the screwing machine 1 is maintained.

  The board holding portion 13 fixed or integrally formed on the distal end side of the locking portion 11 has a bowl shape (conical truncated cone shape), and has a flat contact surface perpendicular to the injection direction of the screw 20 at the distal end. 12 is formed.

  A screw passage 15 penetrating from the locking portion 11 side to the contact surface 12 of the board holding portion 13 is formed at a position corresponding to the screw injection port 14 of the contact arm 9 in the center of the attachment 10.

  The attachment 10 uses an engineering resin to hold the board when the locking piece 11a is appropriately deformed when fitted to the tip of the contact arm 9, and the contact surface 12 is pressed against the board and held from below. The shape and the material thickness are designed so that the portion 13 is not greatly deformed.

  As described above, the attachment 10 is formed with a contact surface 12 that is perpendicular to and flat with respect to the injection direction of the screw 20, and is attached to the screwing machine 1 so that the contact surface 12 is screwed to the board. This makes it easy to keep the position and posture of the screwing machine 1 in an appropriate state, and the board can be screwed efficiently. Moreover, since the screw 20 can be reliably driven perpendicularly to the board, even if the board is soft and brittle gypsum board, it is possible to suppress the destruction of the gypsum board when the end portion is screwed.

  Further, since the contact surface 12 is vertical and flat with respect to the injection direction of the screw 20, even if the contact surface 12 is pressed against the soft and brittle gypsum board when screwing the gypsum board to the ceiling base material, the pressure Is dispersed, so that the depression of the gypsum board can be suppressed.

  Next, a method of fixing the gypsum board 30 to the ceiling base material 40 using the screwing machine 1 will be described with reference to FIG. This gypsum board fixing method is a method used when the gypsum board 30 is fixed to the ceiling base material 40 supported by the wall of the building or the floor of the upper floor with the screws 20.

  First, as shown in FIG. 3A, the gypsum board 30 is lifted, aligned, and the gypsum board 30 is placed on the ceiling base material 40. Next, the gypsum board 30 is supported by one hand (see arrow A) or a head wearing a helmet (in this state, a gap is generated between the gypsum board 30 and the ceiling base material 40). As shown in FIG. 3B, the other hand (not shown) grasps the screwing machine 1 with the attachment 10 attached thereto, and brings the contact surface 12 of the attachment 10 into contact with a predetermined screwing position. At the same time, the gypsum board 30 having a gap with the ceiling base material 40 is pushed up so that the back surface 30 a of the gypsum board 30 is in close contact with the lower surface 40 a of the ceiling base material 40.

  Then, the trigger 6 of the screwing machine 1 is pulled while maintaining a close contact state between the gypsum board 30 and the ceiling base material 40. 3C, the screw 20 is driven into the ceiling base material 40 in a state where the back surface 30a of the gypsum board 30 is in close contact with the lower surface 40a of the ceiling base material 40, and the gypsum board 30 is attached to the ceiling. Fixed to the base material 40. A flat ceiling surface can be formed by fixing the gypsum board 30 to the ceiling base material 40 in this way.

  DESCRIPTION OF SYMBOLS 1 ... Screwing machine, 6 ... Trigger, 9 ... Contact arm part, 10 ... Attachment, 11 ... Locking part, 12 ... Abutting surface, 13 ... Board holding part, 14 ... Screw injection port, 15 ... Screw passage, 20 ... screws, 30 ... gypsum board, 40 ... ceiling base material.

Claims (3)

A contact arm provided in a screwing machine, which is used when fixing a board to a ceiling base material by screwing, and has a mechanism for driving a screw into the ceiling base material using the pressure of high-pressure air and tightening the screw. An attachment to be attached to
A locking portion locked to the tip of the contact arm;
A bowl-shaped board holding portion having a flat and flat contact surface with respect to the injection direction of the screw injected from the contact arm;
An attachment comprising:   A screwing machine comprising the attachment according to claim 1. A method for fixing a gypsum board to a ceiling base material using the screwing machine according to claim 2,
Lifting the gypsum board, aligning and aligning the gypsum board with the ceiling base material, and supporting the gypsum board with one hand;
The gypsum board is gripped by the other hand, the abutment surface of the attachment is brought into contact with a predetermined screwing position of the gypsum board, and the gypsum board is pushed up via the screwing machine. A second step of closely contacting the ceiling base material;
A third step of screwing the gypsum board to the ceiling base material by pulling a trigger of the screwing machine while maintaining a close contact state between the gypsum board and the ceiling base material;
A gypsum board fixing method characterized by comprising:

Images