TWI778660B - Fall prevention device - Google Patents

Abstract

[Problem] To provide a detachment preventing device that can be easily attached to and detached from a socket and a rotary tool and can prevent the socket from falling off the rotary tool. [Solution] An anti-dropping device comprising: a main body part, a first operation part, a second operation part, a first locking member, and a second locking member; and the main body part has a first cylindrical shape into which a sleeve can be inserted part, and a second cylindrical part into which the connecting part of the rotary tool can be inserted; the first operating part is fitted on the outside of the first cylindrical part; the second operating part is fitted on the outside of the second cylindrical part; The first locking member is held by the first cylindrical portion, and the second locking member is held by the second cylindrical portion. By moving the first operation portion, the first locking member can be switched between: a first protruding state that can be locked with the sleeve, and a first release that can release the locking between the first locking member and the sleeve In any of the states, by moving the second operation portion, the second locking member can be switched to a second protruding state that can be locked with the connecting portion, and a second protruding state that can release the connection between the second locking member and the connecting portion. Either of the second release state of the lock.

Description

Fall prevention device

The present invention relates to a fall-off preventing device for preventing falling-off of a sleeve mounted to a rotary tool.

Conventionally, there is known a rotary tool including a connecting portion (anvil, etc.) (for example, an impact driver) to which a connecting head can be connected. When tightening bolts, nuts, etc. (hereinafter, referred to as bolts, etc.) using such a rotating tool, a socket into which the bolts and the like can be fitted is attached to the rotation output portion.

As the socket to be attached to the rotary tool, there are a type of socket in which the connection head is detachable, and a type of socket in which the connection head is integrally formed. Regardless of the type of socket, the connector is attached to the rotary output portion of the rotary tool, thereby attaching the socket to the rotary tool.

When a bolt or the like is tightened using the above-described rotary tool to which the socket is attached, if excessive torque acts on the connector, the connector may be damaged, and the socket may fall from the rotary tool. Therefore, conventionally, various devices for preventing the sleeve from falling have been proposed.

For example, Patent Document 1 discloses a tool socket drop prevention jig. The drop prevention jig disclosed in Patent Document 1 is a jig for preventing a tool sleeve having a sleeve portion and a tool attachment portion from falling, and includes a jig slidably attached to the outer periphery of the tool attachment portion a main body part; and a ring part mounted on the main body part of the clamp.

When the drop prevention jig of Patent Document 1 is used, the ring portion and the main body of the impact driver are connected by a belt-shaped mounting tool. According to such a configuration, even if the tool socket is detached from the impact driver due to breakage of the connector or the like, the tool socket is supported by the main body of the impact driver via the jig body, the ring, and the mounting tool. Thereby, the tool socket can be prevented from falling. prior art literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2009-285756

Invention to solve problem

However, as in the structure disclosed in Patent Document 1, in the structure in which the attachment tool attached to the main body of the impact driver is connected to the ring portion of the drop prevention jig attached to the tool socket, it is difficult to remove the attachment tool Assembly and disassembly operations take labor and time.

Therefore, an object of the present invention is to provide a detachment preventing device that can be easily attached to and detached from the socket and the rotary tool and can prevent the socket from falling off the rotary tool. means to solve the problem

The gist of the present invention is the following drop-out preventing device.

(1) A drop-out preventing device for preventing a sleeve connected to a connection portion of a rotary tool via a connector from being dropped from the connection portion, The above-mentioned fall-off prevention device includes: a cylindrical main body portion, a cylindrical first operation portion, a cylindrical second operation portion, a first locking member, and a second locking member; The cylindrical body portion has a first cylindrical portion on one side in the axial direction into which the end portion of the sleeve can be inserted, and has a second cylindrical portion on the other side in the axial direction into which the connecting portion can be inserted shape; The cylindrical first operation portion is fitted to the outside of the first cylindrical portion so as to be movable relative to the first cylindrical portion in the axial direction; The cylindrical second operation portion is fitted to the outside of the second cylindrical portion so as to be movable relative to the second cylindrical portion in the axial direction; the first locking member is held by the first cylindrical portion; The second locking member is held by the second cylindrical portion, By moving the first operation portion in the axial direction with respect to the first cylindrical portion, the first locking member can be switched so that the first locking member maintains the direction of the first locking member in the radial direction of the main body portion. A first protruding state in which the inner side of the cylindrical portion protrudes and can be locked with the sleeve inserted into the first cylindrical portion in the axial direction, and the first locking member is extended from the first locking member in the radial direction from the first protrusion. 1 any one of the first release states in which the position of the protruding state is moved to the outside to release the locking between the first locking member and the sleeve in the axial direction, By moving the second operation portion in the axial direction with respect to the second cylindrical portion, the second locking member can be switched so that the second locking member is maintained toward the second cylindrical portion in the radial direction. In a second protruding state in which the second locking member protrudes from the inner side of the shaft and the second locking member can be locked with the connecting portion inserted into the second cylindrical portion in the axial direction, the second locking member is connected to the second locking member in the radial direction from the second projecting state. The position of the second protruding state is moved to the outside, and any of the second released states in which the locking in the axial direction between the second locking member and the connecting portion can be released can be released.

(2) The falling prevention device according to the above (1), wherein when the first operation portion is positioned at a predetermined first position with respect to the first cylindrical portion, the first locking member becomes the first locking member. 1 in a protruding state, the first operating portion is moved in the axial direction from the first position with respect to the first cylindrical portion, whereby the first locking member is switched to the first released state, When the second operation portion is positioned at a predetermined second position relative to the second cylindrical portion, the second locking member is brought into the second protruding state, and the second operation portion is positioned relative to the second cylindrical portion. The part moves in the axial direction from the second position, whereby the second locking member is switched to the second released state.

(3) The anti-dropping device according to the above (2), wherein the first operation portion moves from the first position to the second operation portion side in the axial direction with respect to the first cylindrical portion, thereby moving the first operation portion toward the second operation portion. The first locking member is switched to the first released state, The second operation part moves from the second position to the first operation part side in the axial direction with respect to the second cylindrical part, whereby the second locking member is switched to the second released state.

(4) The drop-off preventing device according to the above (2) or (3), wherein the drop-off preventing device further includes: a first biasing member that biases the first operating portion to return the first operating portion to the first position; and A second biasing member that biases the second operating portion to return the second operating portion to the second position.

(5) The fall-off preventing device according to any one of (1) to (4) above, wherein the end portion of the sleeve has a columnar portion, and the columnar portion is oriented in the radial direction of the sleeve relative to the columnar shape. a protrusion that protrudes further outside, The end portion of the sleeve is inserted into the first cylindrical portion so that the columnar portion is positioned inside the first locking member in the radial direction of the main body portion, and the protruding portion is positioned relatively in the axial direction. The first locking member is positioned closer to the second cylindrical portion side, The said protruding part is provided so that the said 1st latching member in the said 1st protruding state can be latched. effect of invention

The detachment preventing device of the present invention is easy to detach and assemble with respect to the sleeve and the rotating tool, and can prevent the sleeve from falling off from the rotating tool.

Hereinafter, the fall-off prevention tool which concerns on one Embodiment of this invention is demonstrated using drawing. FIG. 1 is a view showing a fall-out prevention tool according to an embodiment of the present invention, and a socket and a rotating tool to which the fall-out prevention tool is attached. FIG. 2 is a view showing a socket and a rotating tool in a state in which a fall-off prevention tool is attached. FIG. 3 is a diagram for explaining the connection state between the socket and the rotary tool.

First, the sleeve 100 and the rotary tool 200 will be briefly described. As a socket and a rotary tool to which the fall-off prevention tool 10 of the present embodiment is attached, a conventional socket and a structure of a well-known rotary tool can be used. Therefore, the socket 100 and the rotary tool 200 will be briefly described.

As shown in FIG. 1 , the sleeve 100 has a sleeve body 102 and a support portion 104 . The sleeve body 102 has a hollow shape so that a fastening member such as a bolt or a nut can be fitted. The support portion 104 is provided at one end portion in the axial direction of the sleeve 100 . The support portion 104 has a columnar portion 104a and a protruding portion 104b. The protruding portion 104b is provided so as to protrude more outward than the columnar portion 104a in the radial direction of the sleeve 100 . In the present embodiment, the protruding portion 104b is provided at one end of the columnar portion 104a in the axial direction of the sleeve 100 . In addition, in this specification, regardless of the shape of the sleeve (cylindrical shape, square cylindrical shape), the radial direction of the sleeve refers to the direction passing through the axial center of the sleeve and orthogonal to the axial direction of the sleeve .

A connector (connection member) 300 is attached to the support portion 104 . Although detailed description is omitted, the connector 300 may be detachable from the support portion 104 , or the connector 300 may be fixed to the support portion 104 . In addition, the support portion 104 and the connector 300 may be separate members, or may be a single member. In the present embodiment, the concave portion 300 a is formed on the outer peripheral surface of the connector 300 so as to extend in the circumferential direction of the connector 300 .

As shown in FIGS. 1 and 2, as the rotating tool 200, for example, a conventional impact driver can be used. In the present embodiment, the rotary tool 200 includes a main body portion 202 that accommodates a drive device and the like, and a connection portion 204 to which the connection head 300 is connected.

As shown in FIGS. 1 and 3 , the connecting portion 204 includes: an anvil 206 whose distal end portion is formed into a cylindrical shape; an operating member 208 fitted to the outside of the anvil 206 ; and a plurality of spherical locking members 210 It is accommodated between the anvil 206 and the operating member 208 .

As shown in FIG. 3 , the anvil 206 is configured so that the connector 300 can be inserted. The operating member 208 has a cylindrical shape. The anvil 206 is connected to a driving device in the main body portion 202, and is rotationally driven by the above-mentioned driving device. Thereby, the connector 300 inserted into the anvil 206 is rotated, and the sleeve 100 is rotated.

The operation member 208 has a small diameter portion 208a, a large diameter portion 208b, and an enlarged diameter portion 208c. In the operation member 208, a small-diameter portion 208a is provided at an end portion on the main body portion 202 side, and a large-diameter portion 208b is provided at an end portion opposite to the small-diameter portion 208a. The enlarged diameter portion 208c is provided so as to connect the small diameter portion 208a and the large diameter portion 208b, and to gradually increase in diameter from the small diameter portion 208a toward the large diameter portion 208b.

In the present embodiment, the connecting portion 204 is formed so that the locking member 210 is fitted into the recessed portion 300 a of the connecting head 300 when the connecting head 300 is inserted into the anvil 206 . In addition, in the present embodiment, the coupling head 300 can be prevented from falling off from the anvil 206 by fitting the locking member 210 into the recessed portion 300a.

Specifically, in the state shown in FIG. 3 , when the connector 300 is about to move in a direction away from the main body portion 202 of the rotary tool 200 , the locking member 210 is locked in the recessed portion 300 a. However, even if the locking member 210 is pushed in the direction away from the main body portion 202 in the state shown in FIG. 3, the movement of the locking member 210 in the direction away from the main body portion 202 is restricted by the anvil 206, and the locking The operation member 208 also restricts the movement of the stop member 210 to the outside (in a direction orthogonal to the axial direction of the connector 300 ). Therefore, in the state shown in FIG. 3 , when the connecting head 300 is to be moved in a direction away from the main body portion 202 , the anvil 206 and the connecting head 300 are locked to each other via the locking member 210 . Thereby, the connecting head 300 can be prevented from moving in a direction away from the main body portion 202 relative to the anvil 206 , and the connecting head 300 can be prevented from falling off from the anvil 206 .

In addition, in this embodiment, the connector 300 can be pulled out from the anvil 206 by moving the operation member 208 in a direction away from the main body portion 202 relative to the anvil 206 from the state shown in FIG. 3 . Specifically, by moving the operating member 208 as described above, the cavity portion (space for moving the locking member 210 : not shown) provided in the operating member 208 is positioned outside the locking member 210 . In the above state, when the locking member 210 is pushed in a direction away from the main body portion 202 by the connector 300, the locking member 210 moves to the above-mentioned space, and the locking between the connector 300 and the locking member 210 can be released. end. As a result, the connector 300 can be pulled out from the anvil 206 .

In addition, even when the anvil 206 and the operating member 208 are in the positional relationship shown in FIG. 3 , the locking member 210 can be operated by pushing the locking member 210 toward the main body portion 202 by the connector 300 . The aforementioned space within member 208 moves. Therefore, when the connector 300 is inserted into the anvil 206 , the operation member 208 may not be moved relative to the anvil 206 .

Next, the drop prevention tool 10 will be described in detail. FIG. 4 is a cross-sectional view showing the internal structure of the drop prevention tool 10 .

As shown in FIGS. 3 and 4 , the fall prevention tool 10 includes a main body portion 12 , a first operation portion 14 , a second operation portion 16 , and a plurality of (two in the present embodiment) first locking members. 18. Plural (two in this embodiment) of the second locking member 20 , the third locking member 22 , the fourth locking member 24 , the first biasing member 26 , and the second biasing member 28 .

As shown in FIG. 4 , the main body portion 12 has a cylindrical shape. In this embodiment, the main-body part 12 has the 1st cylindrical part 12a, the 2nd cylindrical part 12b, and the 3rd cylindrical part 12c. The first cylindrical portion 12a is provided on one side of the main body portion 12 in the axial direction (the direction indicated by the arrow A. Hereinafter, referred to as the axial direction A.), and the second cylindrical portion 12b is provided on the other side in the axial direction A. .

The 3rd cylindrical part 12c is provided in the center part of the main-body part 12 in the axial direction A, and connects the 1st cylindrical part 12a and the 2nd cylindrical part 12b. In the present embodiment, in the radial direction of the main body portion 12 , the inner peripheral surface of the third cylindrical portion 12c faces further inward than the inner peripheral surface of the first cylindrical portion 12a and the inner peripheral surface of the second cylindrical portion 12b protrude. In addition, in this specification, regardless of the shape (cylindrical shape, square cylinder shape) of the body portion, the radial direction of the body portion refers to a direction passing through the axis of the body portion and orthogonal to the axial direction of the body portion .

A plurality of (two in the present embodiment) guide holes 13a are formed in the first cylindrical portion 12a penetrating in the radial direction of the main body portion 12 . In addition, a plurality of (two in the present embodiment) guide holes 13b which penetrate in the radial direction of the main body portion 12 are formed in the second cylindrical portion 12b.

The recessed part 13c is formed in the outer peripheral surface of the main-body part 12 (1st cylindrical part 12a) at the position closer to one side than the guide hole 13a in the axial direction A. As shown in FIG. Moreover, the recessed part 13d is formed in the outer peripheral surface of the main-body part 12 (2nd cylindrical part 12b) at the position on the other side rather than the guide hole 13b in the axial direction A. As shown in FIG. The recessed parts 13 c and 13 d are formed in an annular shape and extend in the circumferential direction of the main body part 12 .

An annular support surface 13e is formed on the outer peripheral surface of the main body portion 12 at a position closer to the other side than the guide hole 13a in the axial direction A. As shown in FIG. The support surface 13e is formed to face one side in the axial direction A. As shown in FIG. In addition, an annular support surface 13f is formed on the outer peripheral surface of the main body portion 12 at a position closer to one side than the guide hole 13b in the axial direction A. As shown in FIG. The support surface 13f is formed to face the other side in the axial direction A. As shown in FIG. In this embodiment, the support surface 13e is provided in the outer peripheral surface of the 1st cylindrical part 12a, and the support surface 13f is provided in the outer peripheral surface of the 3rd cylindrical part 12c.

The first operation portion 14 is fitted to the outside of the first cylindrical portion 12a so as to be movable in the axial direction A relative to the first cylindrical portion 12a. The 1st operation part 14 has the cylindrical main-body part 14a, and the protrusion part 14b which protrudes radially inward from the main-body part 14a. The first operation portion 14 is fitted to the first cylindrical portion 12a so as to position the protruding portion 14b on the side of the support surface 13e in the axial direction A. As shown in FIG.

The second operation portion 16 is fitted to the outside of the second cylindrical portion 12b so as to be movable in the axial direction A relative to the second cylindrical portion 12b. The 2nd operation part 16 has the cylindrical main-body part 16a, and the protrusion part 16b which protrudes radially inward from the main-body part 16a. The second operation portion 16 is fitted to the second cylindrical portion 12b so as to position the protruding portion 16b on the other side of the support surface 13f in the axial direction A. As shown in FIG.

The plurality of first locking members 18 are respectively held by the first cylindrical portion 12a so as to be able to protrude further inward than the inner surface of the first cylindrical portion 12a in the radial direction of the main body portion 12 . In this embodiment, the 1st locking member 18 is hold|maintained in each guide hole 13a. In the present embodiment, each of the first locking members 18 is formed of metal and has a spherical shape. The diameter of the guide hole 13 a on the inner surface of the first cylindrical portion 12 a is smaller than the diameter of the first locking member 18 . Thereby, the 1st locking member 18 is prevented from falling off radially inward from the 1st cylindrical part 12a.

The plurality of second locking members 20 are respectively held by the second cylindrical portion 12 b so as to be able to protrude further inward than the inner surface of the second cylindrical portion 12 b in the radial direction of the main body portion 12 . In the present embodiment, the second locking member 20 is held in each of the guide holes 13b. In the present embodiment, each of the second locking members 20 is formed of metal and has a spherical shape. The diameter of the guide hole 13 b on the inner surface of the second cylindrical portion 12 b is smaller than the diameter of the second locking member 20 . As a result, the second locking member 20 is prevented from falling off radially inward from the second cylindrical portion 12b.

The third locking member 22 has a C-shape or a ring shape, and is fitted into the concave portion 13c. In the present embodiment, for example, a metal C-ring is used as the third locking member 22 . The third locking member 22 is fitted into the recessed portion 13 c so as to partially protrude outward from the recessed portion 13 c in the radial direction of the main body portion 12 . In addition, in the present embodiment, the third locking member 22 is positioned at a position closer to one side in the axial direction A than the protruding portion 14b of the first operation portion 14 .

The fourth locking member 24 has a C-shape or a ring shape, and is fitted into the concave portion 13d. In the present embodiment, for example, a metal C-ring is used as the fourth locking member 24 . The fourth locking member 24 is fitted into the recessed portion 13d so as to partially protrude outward from the recessed portion 13d in the radial direction of the main body portion 12 . In addition, in the present embodiment, the fourth locking member 24 is positioned at a position closer to the other side in the axial direction A than the protruding portion 16b of the second operation portion 16 .

In the present embodiment, a coil spring is used as the first biasing member 26 . The first biasing member 26 is fitted to the outer side of the first cylindrical portion 12 a so as to be positioned between the support surface 13 e of the main body portion 12 and the protruding portion 14 b of the first operating portion 14 . The first biasing member 26 biases the first operation portion 14 to one side in the axial direction A. As shown in FIG. The first operation portion 14 can be prevented from falling off from the first cylindrical portion 12a to one side in the axial direction A by locking the protruding portion 14b with the third locking member 22 .

In the present embodiment, when the force does not act on the first operation part 14 from the outside of the fall-off preventing tool 10 , the first operation part 14 is pressed by the first biasing member 26 to be positioned between the protruding part 14 b and the protruding part 14 b. A position where the third locking members 22 are locked with each other (hereinafter, referred to as a first position). When the first operation portion 14 is positioned at the first position with respect to the first cylindrical portion 12a, the protruding portion 14b closes the opening on one side of the guide hole 13a (the outer side in the radial direction of the main body portion 12). opening). That is, the movement of the first locking member 18 to the radially outer side of the main body portion 12 with respect to the first cylindrical portion 12a is restricted by the protruding portion 14b. As a result, in the radial direction of the main body portion 12, a state in which a part of the first locking member 18 protrudes inward from the inner peripheral surface of the first cylindrical portion 12a can be maintained. In this embodiment, the state in which the 1st locking member 18 maintains the protrusion to the inside of the 1st cylindrical part 12a is called a 1st protrusion state.

On the other hand, as shown in FIG. 5 , by moving the first operation part 14 from the first position (the position shown in FIG. 4 ) to the other side in the axial direction A, the protruding part 14 b can be moved toward the opposite side. The guide hole 13a is moved closer to the position on the other side in the axial direction A. As shown in FIG. Thereby, the opening on one side of the guide hole 13a (the opening located on the outer side in the radial direction of the main body portion 12) is opened. As a result, the first locking member 18 is brought into a state in which the first locking member 18 can move to the radially outer side of the main body portion 12 with respect to the first cylindrical portion 12a. In the present embodiment, the state in which the first locking member 18 can move from the position in the first protruding state to the radially outer side of the main body portion 12 is referred to as a first released state.

As described above, in the present embodiment, by moving the first operation portion 14 in the axial direction A relative to the first cylindrical portion 12a, the first locking member 18 can be switched between the first protruding state and the first releasing state any state. In addition, in the first released state, the first locking member 18 is prevented from coming off to the outer peripheral surface side of the first cylindrical portion 12a by the end portion of the first operation portion 14 (the main body portion 14a ) on one side in the axial direction A. out.

Referring to FIG. 4 , in this embodiment, a coil spring is used as the second biasing member 28 . The second biasing member 28 is fitted to the outside of the second cylindrical portion 12b so as to be positioned between the support surface 13f of the main body portion 12 and the protruding portion 16b of the second operation portion 16 . The second biasing member 28 biases the second operation portion 16 to the other side in the axial direction A. As shown in FIG. The second operation portion 16 can be prevented from falling off from the second cylindrical portion 12b to the other side in the axial direction A by the engagement of the protruding portion 16b with the fourth locking member 24 .

In the present embodiment, when the force does not act on the second operation part 16 from the outside of the fall-off preventing tool 10 , the second operation part 16 is pressed by the second biasing member 28 and is positioned between the protruding part 16 b and the protruding part 16 b. A position where the fourth locking members 24 are locked with each other (hereinafter, referred to as a second position). When the second operation portion 16 is positioned at the second position with respect to the second cylindrical portion 12b, the protruding portion 16b closes the opening on one side of the guide hole 13b (the outer side in the radial direction of the main body portion 12). opening). That is, the movement of the second locking member 20 to the radially outer side of the main body portion 12 with respect to the second cylindrical portion 12b is restricted by the protruding portion 16b. As a result, in the radial direction of the main body portion 12, a state in which a part of the second locking member 20 protrudes inward from the inner peripheral surface of the second cylindrical portion 12b can be maintained. In the present embodiment, the state in which the second locking member 20 protrudes toward the inside of the second cylindrical portion 12b is referred to as a second protruding state.

On the other hand, as shown in FIG. 6 , by moving the second operation part 16 from the second position (the position shown in FIG. 4 ) to the side in the axial direction A, the protruding part 16 b can be directed toward the guide. The lead hole 13b is moved closer to one side in the axial direction A. As shown in FIG. Thereby, the opening on one side of the guide hole 13b (the opening located on the outer side in the radial direction of the main body portion 12) is opened. As a result, the second locking member 20 is brought into a state in which the second locking member 20 can move to the radially outer side of the main body portion 12 with respect to the second cylindrical portion 12b. In the present embodiment, the state in which the second locking member 20 can move from the position of the second protruding state to the radially outer side of the main body portion 12 is referred to as a second released state.

As described above, in the present embodiment, by moving the second operation portion 16 in the axial direction A relative to the second cylindrical portion 12b, the second locking member 20 can be switched between the second protruding state and the second releasing state any of the states. In addition, in the second released state, the second locking member 20 can be prevented from moving toward the outer peripheral surface side of the second cylindrical portion 12b by the end portion on the other side of the axial direction A of the second operation portion 16 (the main body portion 16a). come out.

Next, an example of the connection method and the removal method of the fall prevention tool 10, the sleeve 100, and the rotary tool 200 is demonstrated.

In the case of connecting the drop prevention tool 10, the sleeve 100, and the rotary tool 200, for example, as shown in FIG. 4. The position shown in the figure.) Move to the side of the axial direction A. Thereby, the second locking member 20 is switched from the second protruding state (maintaining the state protruding inwardly of the second cylindrical portion 12 b ) to the second releasing state (state capable of moving to the radially outer side of the main body portion 12 ) ).

Next, as shown in FIGS. 8 and 9, the connecting portion 204 is inserted into the second cylindrical portion 12b. At this time, since the second locking member 20 is in the second release state as described above, the second locking member 20 moves toward the radially outer side of the main body portion 12 to pass the large-diameter portion 208b of the operation member 208 and move to the expanded position. outside of the diameter portion 208c.

Next, as shown in FIG. 10, the 2nd operation part 16 is returned to the 2nd position (home position). Thereby, the second locking member 20 is brought into the second protruding state. In the second protruding state, as described above, the state in which the second locking member 20 protrudes inward of the second cylindrical portion 12b is maintained. Therefore, even if the anti-dropping tool 10 (the main body portion 12 ) is pulled toward one side in the axial direction A with respect to the connecting portion 204 , the second locking member 20 is locked with the connecting portion 204 (the enlarged diameter portion 208 c ), On the other hand, the fall-off preventing device 10 (the main body portion 12 ) moves to one side in the axial direction A with respect to the connecting portion 204 .

In the above-described manner, the drop prevention tool 10 is attached to the rotating tool 200 .

Next, as shown in FIG. 11 , the first operation portion 14 is moved from the first position (home position: the position shown in FIG. 4 ) to the other side in the axial direction A with respect to the first cylindrical portion 12a. As a result, the first locking member 18 is switched from the first protruding state (maintaining the state of protruding toward the inside of the first cylindrical portion 12 a ) to the first released state (the state capable of moving toward the outer side in the radial direction of the main body portion 12 ). ).

Next, as shown in FIGS. 12 and 13 , the sleeve 100 is inserted into the first cylindrical portion 12 a and the connector 300 is inserted into the anvil 206 . At this time, since the first locking member 18 is in the first released state as described above, the first locking member 18 moves to the outer side in the radial direction of the main body portion 12 to pass over the protruding portion 104b of the sleeve 100 and move to the column outside of the shaped portion 104a.

As shown in FIG. 3 , after the sleeve 100 and the coupling head 300 are pushed toward the rotary tool 200 side to the position where the locking member 210 is fitted into the concave portion 300 a of the coupling head 300 , the first operation portion 14 is returned to the first position (original position). As a result, the first locking member 18 is brought into the first protruding state, and the attachment of the sleeve 100 and the connector 300 to the fall-off preventing tool 10 and the rotating tool 200 is completed. That is, the connection of the drop prevention tool 10 , the sleeve 100 , and the rotary tool 200 is completed. In addition, in the present embodiment, the sleeve 100 and the connector 300 are attached to the fall prevention tool 10 and the rotation tool 200 in a state of being relatively rotatable with respect to the main body 12 in the circumferential direction of the main body 12 , for example.

In the above-mentioned example, after attaching the anti-dropping tool 10 to the rotary tool 200, the sleeve 100 and the connector 300 are attached to the anti-dropping device 10 and the rotary tool 200, but the sleeve having the connector 300 may be After the 100 is attached to the anti-dropping tool 10 , the anti-dropping tool 10 and the connector 300 are attached to the rotating tool 200 . In the above-mentioned case, first, after the first operation portion 14 of the drop prevention tool 10 is operated to bring the first locking member 18 into the first release state, the sleeve 100 having the connector 300 is inserted into the first cylindrical portion 12a Inside. Next, the 1st operation part 14 is returned to the original position (1st position), and the 2nd operation part 16 is operated, and the 2nd locking member 20 is made into a 2nd release state. In the above state, the connecting portion 204 is inserted into the second cylindrical portion 12b, and the connecting head 300 is inserted into the connecting portion 204 (anvil 206). Finally, the 2nd operation part 16 is returned to the original position (2nd position), and the connection of the fall prevention tool 10, the sleeve 100, and the rotating tool 200 is completed.

In addition, in the present embodiment, for example, the fall-off preventing tool 10 and the sleeve 100 can be detached from the rotary tool 200 as follows.

First, as shown in FIG. 14 , with the second operation portion 16 positioned at the home position (second position), the main body portion 12 (fall prevention tool 10 ) is pulled in a direction away from the rotating tool 200 . At this time, since the main body portion 12 and the operation member 208 are locked to each other via the second locking member 20 , the operation member 208 is pulled by the main body portion 12 via the second locking member 20 , and the operation member 208 is relative to the anvil 206 . Move away from the rotary tool 200 . In the above state, as shown in FIG. 15 , by pulling the sleeve 100 to one side in the axial direction A, the locking member 210 is detached from the concave portion 300 a of the connector 300 . At this time, when the first operation portion 14 is positioned at the home position (first position), the protruding portion 104b is locked with the first locking member 18, and the sleeve 100 cannot be pulled out from the fall prevention tool 10. In the above case, as shown in FIG. 12, by moving the first operation portion 14 to the other side in the axial direction A, the first locking member 18 is brought into the first release state, and the first locking member is released. 18 and the sleeve 100 (protrusion 104b) are locked in the axial direction A. Thereby, the sleeve 100 and the connector 300 can be detached from the fall-off preventing tool 10 .

After that, as shown in FIG. 9 , by moving the second operation portion 16 to one side in the axial direction A, the second locking member 20 is brought into the second release state, and the second locking member 20 and the connecting portion 204 are released. (operating members 208 ). Thereby, the rotation tool 200 can be detached from the fall-off preventing tool 10 . In addition, although detailed description is abbreviate|omitted, after removing the rotating tool 200 from the fall-off prevention tool 10, you may remove|disconnect the sleeve 100 and the connector 300 from the fall-off prevention tool 10. (Effect of the present embodiment)

As described above, in the drop prevention tool 10 of the present embodiment, by operating the first operation portion 14 and the second operation portion 16 , the connection and operation of the drop prevention tool 10 , the sleeve 100 , and the rotating tool 200 can be easily performed. disassemble.

In addition, in the state where the fall-off prevention tool 10, the sleeve 100, and the rotating tool 200 are connected as described above, by positioning the first operation portion 14 at the first position (home position), the first locking member 18 becomes the first protruding state, and the sleeve 100 can be prevented from falling off from the rotary tool 200 . Specifically, in the first protruding state, as described above, the state in which the first locking member 18 protrudes inward of the first cylindrical portion 12a is maintained. Therefore, as shown in FIG. 16, even if the connector 300 is broken during operation, the protrusion 104b is locked with the first locking member 18, and the sleeve 100 is prevented from falling off the preventing device 10 (the first cylindrical shape). The part 12a) comes off.

In addition, in the state shown in FIG. 16, there exists a possibility that the main-body part 12 may be pulled to one side in the axial direction A by the sleeve 100. As shown in FIG. However, since the main body portion 12 is locked to the connection portion 204 (operation member 208 ) via the second locking member 20 , the dropout prevention tool 10 is prevented from being dropped from the connection portion 204 (rotation tool 200 ). Thereby, the sleeve 100 can be prevented from falling off from the rotary tool 200 .

In addition, detailed description is omitted, but when the connector 300 comes off the sleeve 100 , the protrusion 104b is also locked with the first locking member 18 in the same manner, and the sleeve 100 can be prevented from coming off the rotary tool 200 .

Moreover, in this embodiment, by moving the 1st operation part 14 from the home position (1st position) to the 2nd operation part 16 side, the 1st locking member 18 can be brought into a 1st release state. In addition, the second locking member 20 can be brought into the second released state by moving the second operation portion 16 from the home position (second position) to the first operation portion 14 side. Therefore, when the 1st operation part 14 and the 2nd operation part 16 are operated, the dimension of the axial direction of the fall prevention tool 10 does not become large. Thereby, attachment and detachment of the fall-off preventing tool 10 become easy.

In addition, in the above-mentioned embodiment, the case where the drop prevention tool 10 has the two first locking members 18 and the two second locking members 20 has been described, but the first locking members 18 and the second locking members The number of each of the stop members 20 may be one or three or more. In addition, the guide hole 13a and the guide hole 13b may be formed corresponding to the first locking member 18 and the second locking member 20, respectively.

In addition, the size and shape of each part of the fall-off prevention tool can be appropriately changed according to the size and shape of the sleeve and the rotating tool. Therefore, for example, the diameter of the first cylindrical portion may be smaller than the diameter of the second cylindrical portion. In addition, the shapes of the sleeve and the rotary tool are not limited to the above-mentioned examples. Specifically, the sleeve may have a locked portion (protruding portion 104b in the above-described embodiment) that can be inserted into the first cylindrical portion and locked with the first locking member, and the rotary tool has an insertable portion. What is necessary is just to be able to be latched to the to-be-locked part (in the above-mentioned embodiment, the enlarged diameter part 208c) of a 2nd latching member in a 2nd cylindrical part and a connection part.

In addition, in the above-mentioned embodiment, the case where the main body portion 12 , the first operation portion 14 , and the second operation portion 16 have a cylindrical shape has been described, but the main body portion, the first operation portion, and the second operation portion may also be Has a square tube shape. Industrial Availability

The detachment preventing tool of the present invention is easy to detach from the sleeve and the rotating tool, and can prevent the sleeve from falling out of the rotating tool.

10: Falling prevention device 12: Main body 12a: 1st cylindrical part 12b: Second cylindrical part 14: 1st Operation Section 16: 2nd Operation Section 18: 1st locking member 20: Second locking member 22: 3rd locking member 24: Fourth locking member 26: The first elastic member 28: The second elastic member 100: Sleeve 200: Rotation Tool 300: Connector

[FIG. 1] It is a figure which shows the fall-out prevention tool which concerns on one Embodiment of this invention, and the sleeve and the rotation tool to which the fall-out prevention tool is attached. [FIG. 2] It is a figure which shows the sleeve and the rotating tool in the state which attached the fall-off prevention tool. [FIG. 3] It is a figure for demonstrating the connection state between a sleeve and a rotary tool. [ Fig. 4 ] is a cross-sectional view showing the internal structure of the drop prevention tool. [ Fig. 5 ] is a cross-sectional view showing the fall-off preventing device when the first locking member is in the first released state. [ Fig. 6 ] is a cross-sectional view showing the fall-off preventing device when the second locking member is in the second release state. [ Fig. 7 ] is a diagram for explaining a method of attaching the fall-off prevention tool to the rotating tool. [FIG. 8] It is a figure for demonstrating the attachment method of attachment of a fall prevention tool to a rotating tool. [ Fig. 9 ] is a diagram for explaining a method of attaching the fallout prevention tool to the rotating tool. [ Fig. 10 ] is a diagram for explaining a method of attaching the fall-off prevention tool to the rotating tool. [ Fig. 11 ] is a diagram for explaining a method of attaching the sleeve and the connector to the fallout preventing device and the rotating tool. [ Fig. 12 ] is a diagram for explaining a method of attaching the sleeve and the connector to the fall-off preventing device and the rotating tool. [ Fig. 13 ] is a diagram for explaining a method of attaching the sleeve and the connector to the fall-off preventing device and the rotating tool. [ Fig. 14 ] is a diagram for explaining a method of removing the sleeve and the connector from the fall-off preventing device and the rotating tool. [ Fig. 15 ] is a diagram for explaining a method of detaching the sleeve and the connector from the fall-off preventing device and the rotating tool. [FIG. 16] It is a figure for demonstrating the effect of a fall-off prevention tool.

10: Falling prevention device

12: Main body

12a: 1st cylindrical part

12b: Second cylindrical part

12c: 3rd cylindrical part

14: 1st Operation Section

14a: main body

16: 2nd Operation Section

16a: main body

16b: Protrusion

18: 1st locking member

20: Second locking member

22: 3rd locking member

24: Fourth locking member

26: The first elastic member

28: The second elastic member

100: Sleeve

104: Support part

104a: Columnar part

104b: Protrusion

200: Rotation Tool

202: Main body

204: Connector

206: Anvil

208: Operating Components

208a: Small diameter section

208b: Large diameter section

208c: Expansion part

210: Locking member

300: Connector

300a: Recess

Claims (5)

A fall-off preventing tool for preventing a sleeve connected to a connecting portion of a rotary tool via a connecting head from falling off from the connecting portion, the falling-off preventing tool comprising: a cylindrical main body portion, a cylindrical first operation portion, a cylindrical second operation portion, a first locking member, and a second locking member; the cylindrical body portion has a first cylindrical portion on one side in the axial direction into which the end portion of the sleeve can be inserted, The other side in the axial direction has a second cylindrical portion into which the connecting portion can be inserted, and the cylindrical first operation portion is fitted to the first cylindrical portion so as to be movable relative to the first cylindrical portion in the axial direction. the outside of the first cylindrical portion; the second cylindrical operation portion is fitted to the outside of the second cylindrical portion so as to be movable relative to the second cylindrical portion in the axial direction; the first locking The member is held by the first cylindrical portion; the second locking member is held by the second cylindrical portion; and the first operation portion is moved in the axial direction with respect to the first cylindrical portion, and the second locking member is moved in the axial direction. 1. The locking member is switched so that the first locking member protrudes inwardly of the first cylindrical portion while maintaining the radial direction of the main body portion, and is capable of engaging with the sleeve inserted into the first cylindrical portion in the axial direction. The first protruding state in which the cartridge is locked, and the first locking member can be released from the first locking member and the sleeve by moving outward from the position of the first projecting state in the radial direction. Any of the first released states of the locking in the axial direction, By moving the second operation portion in the axial direction with respect to the second cylindrical portion, the second locking member is switched so that the second locking member is maintained toward the second cylindrical portion in the radial direction. The second protruding state in which the inner side protrudes and can be locked in the axial direction with the connecting portion inserted into the second cylindrical portion, and the second locking member protrudes from the second protruding state in the radial direction by the Any of the second released states in which the locking in the axial direction between the second locking member and the connecting portion can be released by moving the position of the second locking member to the outside. The anti-falling device according to claim 1, wherein when the first operation portion is positioned at a predetermined first position with respect to the first cylindrical portion, the first locking member is in the first protruding state, and the The first operation portion moves from the first position in the axial direction with respect to the first cylindrical portion, thereby switching the first locking member to the first release state, and the second operation portion moves relative to the first position in the axial direction. When the cylindrical portion is positioned at a predetermined second position, the second locking member is in the second protruding state, and the second operation portion is in the axial direction from the second position with respect to the second cylindrical portion. By moving, the said 2nd locking member is switched to the said 2nd release state. The anti-falling device according to claim 2, wherein the first operation part is moved from the first position to the second operation part side in the axial direction with respect to the first cylindrical part, thereby locking the first operation part. The member is switched to the above-mentioned first released state, and the above-mentioned second operation portion is extended from the above-mentioned axial direction with respect to the above-mentioned second cylindrical portion. The second position is moved to the first operation portion side, whereby the second locking member is switched to the second released state. The fall-off preventing device according to claim 2 or 3, further comprising: a first biasing member, a second biasing member; and the first biasing member for biasing the first operation portion to return the first operation portion to the above-mentioned The first position; the second biasing member biases the second operating portion to return the second operating portion to the second position. The fall-off preventing device according to any one of claims 1 to 3, wherein the end portion of the sleeve has a columnar portion and a protruding portion; protruding further outside, the end portion of the sleeve is inserted into the first cylindrical portion so that the columnar portion is positioned inside the first locking member in the radial direction of the main body portion, and the protruding portion is positioned in the The axial direction is positioned closer to the second cylindrical portion side than the first locking member, and the protruding portion is provided so as to be able to be locked with the first locking member in the first protruding state.

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