JP2007222954A - Tool member replacement tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool member replacement tool, safely, simply and quickly attaching and detaching a tool member to a tool. <P>SOLUTION: This tool member replacement tool 10 is a tool for attaching and detaching the tool member to the tool by fastening and loosening a hexagonal nut as a fastening member. The tool includes: a base 1; a hexagonal hole 1a in which the tool is inserted in attaching and detaching the tool member; a bearing 2 held on the base 1; a rotary link 3 supported to the base 1 through a bearing 2 to freely rotate around the hexagonal hole 1a; a lever 6 pivoted on the rotary link 3 through a bolt 4; an engagement groove 6a formed in a lever 6 and engaged with the hexagonal nut when the tool is inserted and held in the hexagonal hole 1a; and a handle 7 integrated with the lever 6 to rock the lever 6 to the rotary link 3 when the engagement groove 6a is not engaged with the hexagonal nut, and integrally rotating the lever 6 and the rotary link 3 when the engagement groove 6a is engaged with the hexagonal nut on receiving the operating force. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tool member replacement jig such as a cutting tool, and more particularly to a tool member replacement jig for a tool in which a tool member is attached to or detached from a tool by tightening or loosening a fastening member such as a hex nut. Especially, it is related with the tool member replacement jig applied to the tool by which a tool member is attached to the rotation part etc. of a tool by a double nut system.

  Patent Document 1 discloses a tool for detaching a driver bit, which is a kind of tool member, from a tool body via a ratchet mechanism having a steel ball and a spring. Such a ratchet mechanism is employed when the fixing force of the tool member to the tool body may be relatively small.

  On the other hand, when a relatively large fixing force is required, a gripping part in which a tool member is inserted on the inner peripheral side and deformable in the radial direction and a gripping part fitted on the outer peripheral side of the gripping part and subjected to a turning operation are received. A mechanism having a fastening member that deforms the grip portion is employed.

  FIG. 1 is a schematic view of a tool (grinding tool) in which a cutting tool or tool member is attached to or detached from the tool body by tightening or loosening a hexagon nut.

  Referring to FIG. 1, this tool 11 performs deburring and the like by rotating the tip of a tool to which a cutting tool (tool member) 14 is attached. Two hex nuts 12 and 13 are moved in directions opposite to each other. The tool member 14 is attached to the tool 11 by tightening to the tool 11 by a double nut method. Note that the holding rotation preventing nut 12 is attached to the rotating portion of the tool 11.

  2A to 2D are process diagrams for explaining a conventional tool member replacement method in the tool shown in FIG.

  Referring to FIG. 2A, in step (a), the main body of the tool 11 in which the tool member 14 is inserted is held by the left hand with the tool member 14 side facing upward. Referring to FIG. 2B, in step (b), the spanner (large) held by the right hand is hooked on the holding hexagon nut 12. Subsequently, in the step (c), the spanner (large) is held with the thumb of the left hand.

  Referring to FIG. 2C, in the step (d), the wrench (small) is set on the other tightening hex nut 13 with the right hand. Referring to FIG. 2D, in step (e), while holding the tool 11 and the spanner (large) with the left hand, the spanner (small) is turned with the right hand, and the other hexagon nut 13 is tightened. The tool member 14 is firmly fixed to the tool 11.

  The tool member mounting portion of the tool 11, for example, the diameter of the hexagonal nut, the shape and size of the brake portion (the elastically deformable gripping portion) that grips the pin-shaped rear end portion of the tool member are standardized.

JP-A-8-300200

  However, according to the conventional tool member replacement method described above, there is a risk that the wrench may come off from the hex nut while the hex nut is held, tightened, or loosened by a wrench held in the hand, and may be swung away. Moreover, since two types of spanners are used, there is a problem that work efficiency is low. In particular, when the tool member is attached to the rotating part of the tool, the above-described problems become large.

  An object of the present invention is to provide a tool member replacement jig capable of attaching / detaching a tool member to / from a tool safely, simply and quickly.

  In the first aspect, the present invention provides a tool member replacement jig for attaching / detaching a tool member to / from a tool by tightening or loosening a fastening member, the base member being formed on the base, and when the tool member is attached / detached A hole in which the tool is inserted and held; a bearing held in the base; a rotary link supported by the base via the bearing so as to be rotatable around the hole; and a pivot supported by the rotary link And a lever formed on the lever, and in a state where the tool is inserted and held in the hole, and is integrated with the fastening member and the lever, and receives an operating force. When the fitting groove is not fitted to the fastening member, the lever is swung with respect to the rotating link, and when the fitting groove is fitted to the fastening member, the lever And integral rotation with the rotating link Having a handle for causing, to provide a tool member replacement jig, characterized in that.

  An object of the present invention is to provide a tool member replacement jig capable of attaching / detaching a tool member to / from a tool safely, simply and quickly.

  According to the present invention, when a tool member such as a cutting tool is exchanged, the fitting groove formed in the lever is set in the fastening member, and after that, the lever and the rotary link rotate integrally only by swinging the lever. Since the fastening member is tightened or loosened, the tool member can be changed easily and quickly.

  According to the present invention, the lever or the like is pivotally attached to the base, and the fastening member and the tool are also held by the base, so that the fitting groove formed in the lever can be prevented from being detached from the fastening member during the operation. In other words, since swinging during tightening or loosening work is prevented, work safety is improved.

  According to the present invention, the angle at which the lever is swung by the operation can be easily known, so that damage to the tool or jig due to excessive tightening is prevented.

  In an embodiment of the present invention, the pair of fitting grooves are formed so as to face the lever along the swinging direction of the lever and to open in opposite directions. As a result, the tightening operation and the loosening operation can be performed using separate fitting grooves, and the tightening operation and the loosening operation can be completed by one reciprocating operation, thereby improving the work efficiency.

  In an embodiment of the present invention, the opening width of the fitting groove is formed so as to decrease stepwise from the opening side toward the back side. Thus, a single lever can handle a plurality of types (multiple diameters) of fastening members (hexagon nuts). Therefore, it is possible to tighten and loosen a plurality of types of hexagon nuts, and there is no need to prepare a spanner suitable for the tool each time as in the prior art.

  A tool member replacement jig according to an embodiment of the present invention includes a stopper that is formed on the rotating link and that defines a swing range of the lever relative to the rotating link. This stopper prevents the lever and the handle from moving excessively and increases the safety of the device.

  In an embodiment of the present invention, the rotating link and the bearing are formed in an annular shape, and an annular groove into which the rotating link and the bearing are inserted is formed around the hole in the base, and the lever is a triangular shape. The apex portion is pivotally supported by the rotating link, and the fitting grooves are formed at the base corner portions. According to this embodiment, necessary components can be compactly attached to the base.

  In an embodiment of the present invention, the center of the hole and the center of the fastening member coincide with each other, the pitch between the center of the hole and the pivot point with respect to the base of the lever, and the center of the pivot point and the fitting groove. The pitch between the lines is the same. Thereby, the fitting between the lever and the fastening member is ensured.

  In an embodiment of the present invention, a guide groove formed on the lever, and a guide rod formed on the rotary link and slidable in the guide groove, the lever includes the guide groove and the guide. It is slidably supported on the rotary link via a bar. According to this embodiment, it is possible to use a lever having a normal wrench formed with a guide groove.

  The tool member replacement jig of the present invention can operate a fastening member that is tightened and loosened by rotation of a nut, a bolt, a screw, or the like as a fastening member for securely fixing the tool member to the tool. .

  An embodiment of the present invention will be described with reference to the drawings. 3 (A) to 3 (C) show a tool member replacement jig according to an embodiment of the present invention, (A) is a front view, (B) is a side view, and (C) is a rear view. . FIG. 4 is a schematic cross-sectional view showing a state in which a tool is mounted on the tool member replacement jig 10. In this embodiment, an example of a cutting tool is shown as a tool member.

  3A to 3C and 4, the tool member replacement jig 10 according to an embodiment of the present invention tightens or loosens a hexagonal nut 13 that is a fastening member, so that the cutting tool 14 is moved. A jig that is attached to and detached from the rotating portion 11a of the tool 11, and includes a base 1, a hexagonal hole 1a that is formed on the base 1 and into which the rotation prevention nut 12 of the tool 11 is inserted and held when the cutting tool 14 is attached and detached. 1, a bearing 2 held by 1, a rotating link 3 supported by the base 1 via the bearing 2 so as to be rotatable around the hexagonal hole 1 a, and a lever 6 pivotally supported by the rotating link 3 via a bolt 4. And is formed in the lever 6, the tool is inserted into and held in the hexagonal hole 1 a, the fitting groove 6 a that can be fitted into the hexagonal nut, and the lever 6 are integrated with each other. The mating groove 6a is fitted to the hex nut. When there is not, the lever 6 is swung with respect to the rotary link 3, and when the fitting groove 6 a is fitted to the hexagon nut 13, the handle 7 for rotating the lever 6 and the rotary link 3 together is provided. Have.

  The center of the hexagonal hole 1a coincides with the center of the hexagonal nut 13, the pitch between the center of the hexagonal hole 1a and the pivot point (bolt 4) with respect to the base 1 of the lever 6, and the center line of the pivot point and the fitting groove 6a. The pitch between is consistent.

  On the rotary link 3, two stoppers 8 that define the swing range of the lever 6 with respect to the rotary link 3 are formed at symmetrical positions with respect to the pivot point of the lever 6.

  The rotating link 3 and the bearing 2 are formed in an annular shape. In the base 1, an annular groove 1c into which the rotating link 3 and the bearing 2 are inserted is formed around the hexagonal hole 1a.

  The base 1 is formed with a mounting hole 1b for mounting the base 1 to a work table or the like. The base 1 is preferably attached obliquely with the surface with the rotary link 3 facing down. Thus, the tool 11 is held only by inserting the rotation preventing nut 12 of the tool 11 into the hexagonal hole 1a.

  In particular, referring to FIG. 3 (B), the back surface side of the lever 6 is thick near the apex where the bolt 4 is screwed and the other portions are thin. This is to eliminate the hit of the lever 6 during use after assembly.

  The lever 6 and the handle 7 constitute a lever assembly 5 that swings integrally. The handle 7 is screwed into a screw hole formed in the lever 6 on the opposite side of the hole into which the bolt 4 is screwed. The handle is thickened for easy holding.

  The rear end pin of the cutting tool 14 is gripped by a gripping portion 11 b that is deformed radially inward by tightening the hexagon nut 13.

  FIG. 5 is a detailed view of the lever shown in FIG. Referring to FIGS. 3A and 5, the lever 6 is formed in a triangular shape, the apex portion is pivotally supported by the rotary link 3, and the fitting groove 6a is formed in the base corner portion. The pair of fitting grooves 6a and 6a are disposed to face the lever 6 along the swinging direction of the lever 6 and open in opposite directions.

  The opening width of the fitting groove 6a is formed so as to decrease stepwise from the opening side toward the back side, thereby forming two types of fitting grooves 6b and 6c. It corresponds to the groove widths of the first and second fitting grooves 6b and 6c and the two-surface widths of the two types of hexagon nuts 13, and the hexagon nuts 13 can be engaged with each other. The first fitting groove 6b on the front side corresponds to a hex nut of φ8, and the second fitting groove 6c on the back side corresponds to a hex nut of φ6. Therefore, the lever 6 can be used in common for two types of tools (hex nuts 13) without exchanging parts. Therefore, it is not necessary to prepare a wrench according to the diameter of the hexagon nut 13 as in the prior art.

  Next, a tool member replacement method using the tool member replacement jig according to one embodiment of the present invention described above will be described. FIG. 6 is an operation diagram of the tool member replacement jig shown in FIG. 3 (A) and is a diagram showing a process when tightening a hexagon nut. FIG. 7 is an operation diagram of the tool member replacement jig shown in FIG. 3 (A) and is a diagram showing a process when the hexagon nut is loosened.

  6 and 4, when the hexagon nut 13 is tightened and the cutting tool 14 is fixed to the tool 11, the tool 11 with the left fitting groove 6 a in FIG. 6 engaged with the stopper 8 in the same direction. Is inserted into the hexagonal hole 1a from the back side. The anti-rotation nut 12 is fitted into the hexagonal hole 1 a, and the tool 11 is held on the base 1. The rear end portion of the cutting tool 14 is inserted into the holding portion 11b attached to the rotating portion 11a of the tool 11 and temporarily fixed. When the handle 7 is swung clockwise in FIG. 6, the fitting groove 6 a is fitted with the hexagon nut 13. Further, when the handle 7 is rotated in the same direction, the lever 6 (lever assembly 5) and the rotation link 3 are integrally rotated around the hexagon nut 13 (hexagon hole 1a), and the hexagon nut 13 is rotated. After completion of tightening, the handle 7 is swung in the opposite direction in FIG. 6, the fitting between the fitting groove 6a and the hexagon nut 13 is released, and the tool 11 is removed from the hexagon hole 1a.

  As shown in FIG. 5, the fitting groove 6 a is formed in two stages so as to be compatible with two types of hexagon nut diameters, and thus has a groove width that matches the two-surface width of the hexagon nut 13. What is necessary is just to fit the hexagon nut 13 in any one of the fitting grooves 6b and 6c.

  Referring to FIGS. 7 and 4, when the hex nut 13 is loosened and the blade 14 is pulled out of the tool 11, the handle 7 may be operated in the opposite direction to the tightening. Further, when loosening, the fitting groove 6 a opposite to the case of tightening is fitted with the hexagon nut 13. That is, the fitting groove 6a, which is engaged with the stopper 8 in the initial state when tightening, is fitted with the hexagon nut 13, and the handle 7 is operated counterclockwise in FIG. Loosen.

  According to the tool member replacement jig according to the embodiment of the present invention described above, the tool member mounting portion of the tool is prevented from being damaged during tightening, and repair costs and new purchase costs can be reduced. In addition, when the hex nut is operated with a spanner as in the prior art, there is a trouble of searching for a substitute tool due to wear and loss of the spanner and borrowing a spanner of another tool. According to the replacement jig, it was solved. Furthermore, according to the tool member replacement jig according to one embodiment of the present invention, even an unskilled worker can easily replace the tool member, and the replacement time can be greatly reduced (90 seconds → 10 seconds: trial manufacture). Factory results).

  A tool member replacement jig according to another embodiment of the present invention will be described. FIG. 8 is a schematic front view for explaining a tool member replacement jig according to another embodiment of the present invention. Hereinafter, in the present embodiment, differences from the tool member replacement jig according to the above-described embodiment will be mainly described, and the previous embodiment can be referred to for similar points. .

  Referring to FIG. 8, a tool member replacement jig according to another embodiment of the present invention includes a guide groove 69a formed in a lever 67 serving as a handle, and a hexagonal hole 61a for insertion on the tool side in the center. It has a guide rod 69b formed on a rotation link 63 rotatably supported by a base 61 via a bearing 62, and can slide in a guide groove 69a. A lever 67 has a guide groove 69a and a guide rod 69b. Is slidably supported by the rotary link 63 via the. The fitting groove 67a at the tip of the lever 67 can be formed in two steps as in the previous embodiment. Two guide bars 69b are erected. When the hexagon nut 13 is tightened or loosened, the lever 67 moves along the guide rod 69b, and the fitting groove 67a engages (bits into) the hexagon nut 13. After the fitting groove 67a of the lever 67 is engaged with the hexagon nut 13, when the lever 67 is swung, the lever 67 and the rotary link 63 rotate together, and the hexagon nut 13 rotates and can be tightened or loosened.

  The tool member replacement jig of the present invention is suitably applied to replacement of a tool that rotates the tool member, that is, a tool member that is attached to the rotating portion of the tool. Moreover, the tool member replacement jig of the present invention is applied to a tool in which a tool member is attached to a rotating part of the tool by a double nut method. The tool member can be applied to a processing member such as grinding (grinder, deburring), a screwdriver or hexagon wrench screw attaching / detaching tool member, and more generally a tip machine member as a rotating tool member.

It is a schematic diagram of the tool by which a tool member is attached or detached with a tool main body by tightening or loosening a hexagon nut. (A)-(D) are process drawings for demonstrating the conventional tool member replacement | exchange method in the tool shown in FIG. (A)-(C) show the tool member replacement jig which concerns on one Example of this invention, (A) is a front view, (B) is a side view, (C) is a rear view. It is a schematic cross section which shows a mode that the tool was mounted | worn with the tool member replacement jig | tool 10 of FIG. 3 (A). FIG. 4 is a detailed view of the lever of FIG. FIG. 4 is an operation diagram of the tool member replacement jig shown in FIG. 3 (A) and is a diagram showing a process when a hexagon nut is tightened. FIG. 4 is an operation diagram of the tool member replacement jig shown in FIG. 3 (A), and is a diagram showing a process when a hexagon nut is loosened. It is a model front view for demonstrating the tool member replacement jig which concerns on the other Example of this invention.

Explanation of symbols

1 Base 1a Hexagonal hole 1b Mounting hole 1c Annular groove 2 Bearing 3 Rotating link 4 Bolt 5 Lever assembly 6 Lever 6a Fitting groove 6b First fitting groove 6c Second fitting groove 7 Handle 8 Stopper 10 Tool member removal Replacement jig 11 Tool (main body)
11a Rotating part 11b Holding part 12 Rotation preventing nut 13 Hexagon nut 14 Cutting tool (tool member)
61a Hexagon socket 61 Base 62 Bearing 63 Rotating link 67 Lever 67a Fitting groove 69a Guide groove 69b Guide rod

Claims (7)

A tool member replacement jig for detaching a tool member from a tool by tightening or loosening a fastening member,
Base and
A hole formed in the base and into which the tool is inserted and held when the tool member is attached or detached;
A bearing held by the base;
A rotating link supported by the base via the bearing so as to be rotatable around the hole;
A lever pivotally supported by the rotating link;
A fitting groove that is formed on the lever, and is engageable with the fastening member in a state where the tool is inserted and held in the hole;
When the fitting groove is integrated with the lever and receives an operating force and the fitting groove is not fitted to the fastening member, the lever is swung with respect to the rotating link, and the fitting groove is fastened. A handle for rotating together with the lever and the rotating link when fitted to a member;
A tool member replacement jig characterized by comprising:   The tool member replacement according to claim 1, wherein the pair of fitting grooves are formed so as to face the lever along the swinging direction of the lever and to open in opposite directions. jig.   The tool member replacement jig according to claim 1, wherein the opening width of the fitting groove is formed so as to gradually decrease from the opening side toward the back side.   The tool member replacement jig according to claim 1, further comprising a stopper formed on the rotating link and defining a swing range of the lever with respect to the rotating link. The rotating link and the bearing are formed in an annular shape,
In the base, an annular groove into which the rotating link and the bearing are inserted is formed around the hole,
2. The tool member replacement jig according to claim 1, wherein the lever is formed in a triangular shape, a vertex portion is pivotally supported by the rotating link, and the fitting groove is formed in a base corner portion. 3.   The center of the hole is coincident with the center of the fastening member, and the pitch between the center of the hole and the pivot point with respect to the base of the lever is coincident with the pitch between the pivot point and the center line of the fitting groove. The tool member replacement jig according to claim 1, wherein:   A guide groove formed on the lever, and a guide rod formed on the rotary link and slidable in the guide groove, and the lever is connected to the rotary link via the guide groove and the guide rod. 2. The tool member replacement jig according to claim 1, wherein the tool member replacement jig is slidably supported.

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