JP3166365U - Attachment for preventing rotary tool fall and electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach a ring-shaped spring to a rotary tool by fitting and detaching a reduced diameter ring portion and an annular groove portion of the ring-shaped spring, and to easily connect the rotary tool and an electric tool. Provided are an attachment for preventing a fall of a rotary tool and an electric tool that can be released and can easily replace the rotary tool when the size is changed. SOLUTION: A fastening portion 2a that can be fastened to the power tool side is provided at a base end portion of a connecting member 2 that connects a power tool W and a detachable rotary tool to a rotation output portion W3 of the power tool, and the connecting member. A hook member 2b is provided at the tip of the rotary tool, an annular groove is formed on the outer periphery of the rotary tool, and a C-shaped reduced-diameter ring portion and an open both ends of the reduced-diameter ring portion intersect in the annular groove portion. The ring-shaped spring 3 is loosely fitted, and the hook members can be engaged with and disengaged from both open ends of the ring-shaped spring to expand the diameter of the reduced-diameter ring portion of the ring-shaped spring against the spring pressure. A pair of facing finger pinching portions are provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a rotary tool fall prevention attachment used for an electric tool such as, for example, an electric screwdriver, an impact screwdriver, and an electric drill, and an electric tool including the attachment.

  Conventionally, this type of rotary tool fall prevention attachment has been provided with a connecting member that connects the power tool and a rotary tool that is detachable to the rotation output portion of the power tool. And a hook member at the tip of the connecting member, and an annular groove is formed in the outer peripheral portion of the socket part of the rotary tool. The annular groove is pivotably attached to the annular groove by a shaft. There is known a structure in which a pair of plate-like arm members are freely fitted and a hook member of a connecting member is connected to the arm member.

  Therefore, when the rotation output portion of the electric tool and the rotary tool are broken, the connecting member prevents the rotary tool from dropping.

JP 2009-285756 A Utility Model Registration No. 3163715 Utility model registration No. 3155762

  However, these conventional structures have the inconvenience that the mounting and dismounting of the pair of plate-like arm members with respect to the annular groove portion may be troublesome.

  The present invention aims to solve such inconveniences. Among the present inventions, the invention according to claim 1 connects an electric tool and a rotary tool that is detachable to a rotation output portion of the electric tool. The connecting member is provided with a fastening portion that can be fastened to the electric tool side at the base end portion of the connecting member, and a hook member is provided at the distal end portion of the connecting member. An annular groove portion is formed, and a ring-shaped spring comprising a C-shaped reduced diameter ring portion and an open portion of the reduced diameter ring portion intersecting each other is fitted in the annular groove portion so as to be freely rotatable. The hook member can be engaged and disengaged at both open ends of the spring, and a pair of opposing finger pressing portions for expanding the diameter of the reduced diameter ring portion of the ring spring against the spring pressure is provided. It is in the attachment for rotation tool fall prevention characterized by these.

  According to the second aspect of the present invention, a mounting hole portion is provided in the rotation output portion, and the rotation tool has a socket portion that can be fitted to a bolt head or a nut and the mounting hole in the rotation output portion of the electric tool. It is characterized by comprising a bit part that can be fitted to and removed from the part, and the device according to claim 3 is equipped with a hanging metal for hanging on the user's body to the electric tool, The suspension member is formed by attaching a fastening portion of the connecting member, and the invention according to claim 4 is characterized in that the connecting member is a flexible string member. It is characterized by.

  A fifth aspect of the invention is an electric tool comprising the rotary tool dropping prevention attachment according to any one of the first to fourth aspects.

  As described above, according to the first or fifth aspect of the present invention, the electric tool and the rotary tool detachably attached to the rotary output portion of the electric tool are connected by the connecting member. Even if the gap between the output portion and the rotary tool is broken, the rotary tool can be prevented from falling by the connecting member, and the safety of use can be improved. A fastening portion that can be fastened to the tool side is provided, a hook member is provided at the tip of the connecting member, an annular groove portion that is opposed to the outer peripheral portion of the rotary tool is formed, a C-shaped diameter-reducing ring portion, and A ring-shaped spring consisting of intersecting portions of the open ends of the reduced diameter ring portion is fitted freely so that the hook members can be engaged with and disengaged from both open ends of the ring-shaped spring. Opposing to expand the diameter of the reduced diameter ring against the spring pressure Since a pair of finger-clamping portions are provided, the C-shaped reduced diameter ring portion is expanded through the intersection by sandwiching the pair of finger-clamping portions of the ring-shaped spring with fingers. Depending on the diameter, the ring-shaped spring can be detached from the annular groove portion and removed from the socket portion. The ring portion is reduced in diameter by its own spring pressure by being separated from the pressure portion and is fitted in the annular groove, and the ring-shaped spring is rotatably fitted in the annular groove, so that the rotating tool rotates. The above-mentioned fall can be prevented by engaging the hook member at the distal end of the connecting member with one of the finger-clamping pressure parts without affecting the fit of the ring-shaped spring with the reduced diameter ring part and the annular groove part. Easily attach the ring-shaped spring to the rotating tool by removing It can get out, the connection between the rotary tool and the power tool can be easily released, can be performed easily replacement of the rotary tool during resizing, it is possible to improve workability.

  According to the second aspect of the present invention, a mounting hole is provided in the rotation output portion, and the rotation tool is mounted on a socket portion that can be fitted to a bolt head or a nut and the rotation output portion of the electric tool. Since it consists of a bit part that can be fitted and removed in the hole part, the bolt part and nut can be tightened and loosened by the socket part, and the bit part can be fitted and detached from the mounting hole part of the rotation output part of the electric tool. In the device according to claim 3, the power tool is mounted with a hanging metal for suspending it from the user's body, and the hanging metal is specifically connected to the connecting member. Since the electric tool can be suspended from the body and workability can be improved, the connecting member can be bent freely. Because it is a string material, it prevents the connecting member from hindering work. Come, it is possible to improve the workability.

1 is an overall side view of an embodiment of the present invention. It is a separation perspective view of an embodiment of the present invention. 1 is an enlarged side view of an embodiment of the present invention. 1 is an enlarged cross-sectional view of an embodiment of the present invention.

1 to 4 show an embodiment of the present invention, W is electric power tool, in this case, an electric screwdriver, a motor (not shown) to the body portion W ₁ is built in the bottom battery to the section W ₂ There is arranged, the rotation output section W ₃ that is rotationally driven by a motor is provided in the body portion W _1, mounting hole W ₄ is provided on the rotation output section W _3.

1 is a rotary tool, in this case, as shown in FIG. 1, consists Hamada' possible bit unit 1b into the mounting hole W ₄ of the rotation output section W ₃ of the socket portion 1a and the power tool W, the bit unit 1b Is formed in the shape of a hexagonal shaft and has an annular groove portion 1e composed of an annular side surface 1c, 1c and an annular bottom surface 1d facing the outer periphery of the socket portion 1a, and is fitted to a bolt head or nut to be fastened to the socket portion 1a. possible fitting hole 1f is formed, the tool 1 of different sizes of the fitting hole 1f are several available, at the time of replacement of the tool 1 of different sizes, removable, not shown by the slide manipulation of the sleeve W ₅ It has a structure that the bit portion 1b into the mounting hole W ₄ is configured to removably fixed.

  Reference numeral 2 denotes a connecting member, which is formed of a cloth-like string material made of a synthetic resin that can be bent. In this case, the base end portion of the connecting member 2 is fastened to the power tool W side. A releasable hook member 2b is provided at the distal end of the connecting member 2, and a length adjusting portion 2c for adjusting the length of the connecting member 2 is provided in the middle portion.

  Reference numeral 3 denotes a ring-shaped spring, as shown in FIGS. 1, 3, and 4, a C-shaped reduced diameter ring portion 3a, an intersecting portion 3b in which the open ends of the reduced diameter ring portion 3a intersect, and a ring-shaped spring. The hook member 2b can be engaged with and disengaged from both open ends of the ring 3, and a pair of opposed finger pressing portions 3c and 3c for expanding the diameter-reducing ring portion 3a of the ring-shaped spring 3 against the spring pressure are provided. The ring-shaped spring 3 is formed by bending a single spring wire, and the reduced diameter ring portion 3a of the ring-shaped spring 3 is configured to be freely slidably fitted into the annular groove portion 1e.

4 is a concrete hanging metal, which is substantially U-shaped and attached to the body W ₁ of the electric power tool W by a fastening band 4a as shown in FIG. A hanging rod 4b is provided so as to be able to be pulled out and stored, and a hooking portion 4c for hooking the fastening portion 2a of the connecting member 2 is formed at the front portion of the hanging metal plate 4.

Since embodiments of the present is the configuration, as shown in FIG. 1, since the freely rotating tool 1 attached to and detached from the rotation output section W ₃ of the power tool W and the electric tool W are connected by the connecting member 2, the electric even bit portion 1b between the rotation output section W ₃ of the tool W and the rotating tool 1 has been broken, it is possible to prevent the falling of the tool 1 by the connecting member 2, it is possible to improve the safety of use In this case, a fastening portion 2a that can be fastened to the electric tool W side is provided at the base end portion of the connecting member 2, and a hook member 2b is provided at the distal end portion of the connecting member 2 so as to face the outer peripheral portion of the rotary tool W. An annular groove portion 1e composed of an annular side surface 1c, 1c and an annular bottom surface 1d is formed, and a C-shaped reduced diameter ring portion 3a and an open portion 3b of the reduced diameter ring portion 3a intersect each other in the annular groove portion 1e. A ring-shaped spring 3 made of The hook member 2b can be engaged with and disengaged from both open ends of the ring-shaped spring 3, and a pair of opposed finger-clamping sections 3c for expanding the diameter-reduced ring section 3a of the ring-shaped spring 3 against the spring pressure. Since 3c is provided, as shown in FIG. 4, the C-shaped reduced-diameter ring portion 3a is moved from the position indicated by the solid line through the intersecting portion 3b by sandwiching the pair of finger clamping pressure portions 3c and 3c of the ring-shaped spring 3 with fingers. As shown in the imaginary line position, the diameter of the socket portion 1a is larger than the outer diameter of the socket portion 1a, and the ring-shaped spring 3 can be detached from the annular groove portion 1e and removed from the socket portion 1a by this expansion, In this expanded diameter state, the reduced diameter ring portion 3a of the ring-shaped spring 3 is fitted into the annular groove portion 1e of the socket portion 1a and the finger is separated from the pair of finger clamping pressure portions, thereby reducing the diameter reduced ring by its own spring pressure. The portion 3a is reduced in diameter and is fitted into the annular groove 1e. Since the ring-shaped spring 3 is fitted in the annular groove 1e so as to be freely rotatable, the hook member 2b at the tip of the connecting member 2 is not affected by the rotation of the rotary tool 1, and one finger clamping pressure portion is provided. The above-mentioned dropping can be prevented by engaging with 3c, and the ring-shaped spring 3 can be easily attached to and fitted to the socket 1a by fitting / removing the reduced diameter ring portion 3a and the annular groove portion 1e of the ring-shaped spring 3. Can be removed, the connection between the rotary tool 1 and the electric tool W can be easily released, and the replacement work of the rotary tool 1 can be easily performed when the size of the fitting hole 1f is changed. Can be improved.

Further, in this case, the rotation output portion W ₃ is provided with a mounting hole W ₄ , and the rotary tool 1 has a socket portion 1 a that can be fitted to a bolt head or a nut and a rotation output portion W ₃ of the electric tool W. since consisting Hamada' possible bit unit 1b into the mounting hole W _4, the rotational output portion W ₃ of the power tool W by the bit unit 1b it is possible to perform a relaxation fastening operation of the bolt head or a nut by the socket portion 1a of Hamada' working the mounting hole W ₄ can be easily performed, and, in this case, wearing the suspended gold concrete 4 for suspending the body of the user to the electric tool W, Tsushitakin Specifically, since the fastening portion 2a of the connecting member 2 is attached, the electric tool W can be suspended from the body, and workability can be improved. In this case, the connecting member 2 is Because it is a flexible string material, the connecting member 2 may interfere with work. The can be suppressed, thereby improving the workability.

  In addition, this invention is not restricted to said form example, The magnitude | size, shape, material, structure, etc. of the said rotary tool 1, the connection member 2, and the ring-shaped spring 3 are according to the shape, magnitude | size, etc. of the electric tool W. The design is changed as appropriate.

  As described above, the intended purpose can be sufficiently achieved.

W Electric tool W ₃ Rotation output part W ₄ Mounting hole 1 Rotating tool 1a Socket part 1b Bit part 1e Annular groove part 2 Connection member 2a Fastening part 2b Hook member 3 Ring-shaped spring 3a Reduced diameter ring part 3b Intersection part 3c Finger clamp Pressure part 4 Suspension metal concrete

Claims (5)

  A connecting member that connects the power tool and a detachable rotating tool to the rotation output portion of the power tool, and a fastening portion that can be fastened to the power tool side is provided at a base end portion of the connecting member; A hook member is provided at the tip of the connecting member, an annular groove is formed in the outer peripheral portion of the rotary tool, and a C-shaped reduced diameter ring portion and open ends of the reduced diameter ring portion intersect in the annular groove portion. A ring-shaped spring consisting of the intersecting portion of the ring-shaped spring is fitted so as to be freely rotatable, and the hook member can be engaged with and disengaged from both open ends of the ring-shaped spring. An anti-rotation tool fall prevention attachment, comprising a pair of opposing finger pressing portions for expanding the diameter.   The rotation output portion is provided with a mounting hole, and the rotary tool includes a socket portion that can be fitted to a bolt head and a nut, and a bit portion that can be fitted into and removed from the mounting hole portion of the rotation output portion of the electric tool. The attachment for preventing a rotary tool from falling according to claim 1.   A suspension metal for suspending the power tool from a user's body is attached to the power tool, and a fastening portion of the connecting member is attached to the suspension metal. Attachment for prevention of falling rotary tool.   The rotary tool fall prevention attachment according to any one of claims 1 to 3, wherein the connecting member is a bendable string member.   An electric tool comprising the attachment for preventing rotation of the rotary tool according to any one of claims 1 to 4.