JP2012153363A - Connecting structure of fastening member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of a fastening member that drastically reduces the shock due to stretching vibrations of a body to be fastened generated when the connected end parts of a fastening member of a clamp band or the like is released.SOLUTION: The connecting structure of a fastening member includes a first connecting member 2 and a second connecting member 4 connected to end parts of the fastening member, respectively, and a connecting means 6 which engages the first connecting member 2 with the second connecting member 4 so as to be releasable. The connecting means 6 includes: a rotation body 80 which can be rotated around the rotation shaft center in the direction substantially perpendicular to the direction of tension to be applied to the first connecting member 2 and the second connecting member 4, and includes a flat plane opposite to the first connecting member 2 and the second connecting member 4; and a support 81 which rotatably supports the rotation body 80.

Description

  The present invention relates to a fastening member connecting structure that releasably connects ends of fastening members that are wound around a fastened body and fasten the fastened body. The present invention relates to a coupling structure of a fastening member suitable for a coupling device for coupling and separating one spacecraft and a second spacecraft such as a rocket.

  In launching an artificial satellite, it is necessary to firmly fix the artificial satellite to the rocket body before the orbital launch of the artificial satellite and to disconnect it from the rocket body when the orbit is launched. Therefore, the rocket for launching the artificial satellite includes a coupling device for coupling the artificial satellite to the rocket body and separating the rocket body from the rocket body (for example, see Patent Documents 1 to 3 below).

FIG. 10 is a diagram showing a configuration of a conventional coupling device, and shows a state where the rocket body 101 and the artificial satellite 102 are coupled by the coupling device 100. 11 is a cross-sectional view taken along line VV in FIG. 12 is a sectional view taken along line VI-VI in FIG.
As shown in FIGS. 10 to 12, the rocket main body 101 is provided with a flange-shaped rocket side coupling portion 103, and the artificial satellite includes a flange-shaped artificial satellite side coupling portion 104 adapted to the rocket side coupling portion 103. Is provided. A clamp band 105 is wound around the rocket side coupling portion 103 and the satellite side coupling portion 104.

  Each of the coupling parts 103, 104 has end faces 103a, 104a perpendicular to the rocket axis and tapered faces 103b, 104b inclined with respect to the end faces. A projecting portion 103c projecting toward the artificial satellite 102 is formed at the inner end of the rocket side coupling portion 103, and centering is performed by abutting the end surfaces 103a and 104a.

The clamp band 105 includes a band-shaped band 106 made of a spring steel plate or the like, and arc-shaped narrow pressure pieces 107 fixed to the center and both ends of the band 106, respectively. Tabs 107 a projecting outward are formed at the end portions of the narrow pressure piece 107 fixed to both ends of the band 106. The ends of the two clamp bands 105 are releasably connected by a connecting structure 109.
FIG. 13 is a front view of the connecting structure 109 as seen from the direction of the arrow X in FIG. The connecting structure 109 includes a fastener including a bolt 111 and a nut 112 and a bolt cutting device 113 that cuts the bolt 111. The bolt cutting device 113 includes a casing 114, a blade 115 built in the casing 114, and a pyrotechnic 116 containing explosives. The bolt 111 penetrates the casing 114. When the explosive explodes, the blade 115 is accelerated in the direction of the bolt 111 by the gas pressure, and the bolt 111 is cut.

In the coupling device 100 configured as described above, the bolt 111 is inserted into the narrow pressure piece 107 attached to both ends of the clamp band 105, and the nut 112 is screwed into this to connect the clamp bands 105 to each other. The rocket body 101 and the artificial satellite 102 are coupled by narrowing the outer periphery of the rocket side coupling portion 103 and the satellite side coupling portion 104 with the narrow pressure piece 107 fixed to the band 106.
When the satellite is separated, the explosives of the pyrotechnics 116 of the two bolt cutting devices 113 explode simultaneously, and the bolts 111 are cut by the blade 115. Then, the end portions of the two clamp bands 105 are released from each other, and the rocket side coupling portion 103 and the satellite side coupling portion 104 are released from the narrow pressure by the clamp band 105, and the satellite is separated by a separation spring (not shown). 102 is pushed out in the direction of separating from the rocket body 101.

JP 2001-106199 A JP 2000-238700 A JP-A-63-187705

  As shown in FIG. 12, when the clamp band 105 is tightened, the rocket side coupling portion 103 and the satellite side coupling portion 104 are displaced (contracted) to the inner diameter side by the tightening force, and elastic energy is stored. In the connecting structure 109 that connects the ends of the conventional clamp band 105 described above, the bolt 111 is cut by the blade 115 of the bolt cutting device 113 in a short time of only a few tens of μsec (for example, 60 μsec). For this reason, the conventional connection structure has a problem that the elastic energy of the coupling portions 103 and 104 is instantaneously released, and a large impact is generated by the stretching vibration.

  The present invention has been made to solve the above-described problems, and greatly reduces the impact caused by the stretching vibration of the clamped body that occurs when the ends of the clamping members such as the clamp band are released from each other. It is an object of the present invention to provide a connecting structure for a fastening member that can be used.

In order to solve the above-described problems, the fastening member connecting structure according to the present invention employs the following means.
(1) That is, the fastening member connecting structure according to the present invention is a fastening structure in which the ends of the fastening member that is wound around the fastened body and fastens the fastened body are releasably connected. A connecting structure for attaching members, wherein the first connecting member and the second connecting member respectively connected to the end portions of the tightening member, and the first connecting member and the second connecting member are releasably connected. Connecting means, and the connecting means is operable to move between a restraining position for maintaining the connection and a release position for releasing the connection, and a locking means for releasably locking the actuating member at the restraining position. And when the lock by the locking means is released, the operating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and The second connecting members are separated from each other Moves in a direction, the actuating member after moving to the release position, the coupling of the first coupling member and the second coupling member is released, it is characterized.

  Thus, when the lock by the locking means is released, the operating member moves to the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member Since the connection is released, the connection between the ends of the tightening member is thereby released. In the conventional connection structure described above, the bolt is cut instantaneously (several tens of microseconds) by the blade. However, according to the present invention, the lock by the lock means is released and the operating member moves to the release position. Since the first connecting member and the second connecting member are separated while being braked, and then the connection is released, the connection is released more slowly (for example, 1 to several msec) than the conventional connection structure. As a result of the actuating member functioning as a braking means in this way, the elastic energy release speed of the clamped body is lower than that of the conventional connecting structure, so that the impact caused by the stretching vibration of the clamped body can be greatly reduced. it can.

(2) In the reference example, in the above-described tightening member connection structure, an engagement piece is formed on the first connection member, and the operating member maintains the connection to the engagement piece. And a hook member rotatably connected to the second connecting member so as to be movable between a position where the engagement is maintained and a position where the engagement is released. And a turning force in a releasing direction is applied to the hook member by a force received by the hook member from the first connecting member and the second connecting member.

  As described above, the hook member constituting the operating member is engaged with the engaging piece of the first connecting member so that the connection is maintained, and the operating member receives the force from the first connecting member and the second connecting member in the release direction. Therefore, when the lock by the locking means is released, the operating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member And when the second connecting member moves away from each other and the actuating member moves to the release position, the connecting means that the connection between the first connecting member and the second connecting member is released ”can be configured.

(3) Further, in the reference example, in the connection structure of the tightening member, the connection means constitutes the operating member, and the connection is made to both the first connection member and the second connection member. A slider that is slidable between a position where the engagement is maintained and a position where the engagement is released, and the slider, the first connecting member, and the second connecting member, A support for supporting the slider in a slidable manner while supporting the slider in a stationary state while preventing the movement of the first connecting member and the second connecting member when the slider is in a position to maintain the engagement. ,
A moving force in a releasing direction is applied to the slider by a force received by the slider from the first connecting member and the second connecting member.

  In this way, the slider constituting the operating member is maintained by being engaged with both the first connecting member and the second connecting member, and is released to the slider by the force received from the first connecting member and the second connecting member. Since the moving force in the direction is applied, “when the lock by the locking means is released, the operating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting When the member and the second connecting member are moved away from each other and the actuating member is moved to the release position, the connecting means that the connection between the first connecting member and the second connecting member is released "can be configured. .

(4) In the present invention, in the above-described tightening member connection structure, the connecting means constitutes the operating member and has a screw rod having a screw portion and a rotation screwed to the screw rod. And a housing having a through hole connected to the first connecting member and rotatably supporting the rotating body and allowing a screw rod to protrude and retract, the rotating body receiving from the screw rod and the housing A rotational force is applied to the rotating body by the force, and the locking means restrains the movement of the screw rod in the releasing direction via the rotating body so as to be releasable, The second connecting members are configured to be able to engage with each other so as to maintain the connection, and the engagement is maintained when the engaging portion in the engaged state is positioned in the through hole, and the engaging portion is inserted into the through hole. Engage when positioned out of hole It is configured to be released, characterized in that.

  In this way, the screw rod constituting the operating member is engaged with the second connecting member in the through hole so that the connection is maintained, and the axial force received by the screw rod gives the nut member a rotational force in the releasing direction. Since the lock means restrains the rotation of the nut member so as to be releasable, “when the lock by the lock means is released, the operating member moves in the direction of the release position by the tension acting on the first connection member and the second connection member. The first connecting member and the second connecting member move away from each other, and when the operating member moves to the release position, the connection between the first connecting member and the second connecting member is released. Means can be configured.

(5) Also, in the reference example, in the above-described tightening member connection structure, the connection means constitutes the operating member and forms a hollow cylindrical shape from each side in the axial direction. A rotating body in which the connecting member and the second connecting member can be inserted and which can rotate around a cylindrical axis; and a support body which rotatably supports the rotating body, the rotating body and the first connecting member And the second connecting member prevents the first connecting member and the second connecting member from being separated from the rotating body when the position of the rotating body around the axis is at the first position. The first connecting member and the second connecting member can be detached from the rotating body when the position is at the second position, and the rotating body is configured to be the first connecting member and the second connecting member. Rotation in the release direction by the force received from There is imparted, characterized in that.

  As described above, the rotating body constituting the operating member can insert the first connecting member and the second connecting member from both sides in the axial direction, and the engagement with these is maintained / released according to the position around the axis. Since the rotational force in the releasing direction is applied to the rotating body by the force received by the rotating body from the first connecting member and the second connecting member, “when the lock by the locking means is released, the first connecting member and the first connecting member When the actuating member moves in the direction of the release position due to the tension acting on the two connecting members, the first connecting member and the second connecting member move away from each other, and the actuating member moves to the releasing position. The connection means that “the connection between the member and the second connection member is released” can be configured.

(6) Further, in the present invention, in the above-described tightening member connecting structure, the connecting means constitutes the operating member and forms a hollow cylindrical shape from both sides in the axial direction. A rotating member in which a connecting member and the second connecting member can be inserted and rotated around a cylindrical axis; and a support member that rotatably supports the rotating member, the first connecting member and the second connecting member. A portion of the connecting member inserted into the rotating body has a cylindrical shape, and a first spiral groove is formed on one of the outer peripheral surface of the cylindrical portion of the first connecting member and the inner peripheral surface of the rotating member, Is formed with a first protrusion that can be fitted into the first spiral groove, and a second spiral groove is formed on one of the outer peripheral surface of the cylindrical portion of the second connecting member and the inner peripheral surface of the rotating body. The second projecting portion that can be fitted into the second spiral groove is formed on the other side, and the rotating body is connected to the first connecting portion. Rotational force of the releasing direction to the rotating body is imparted by a force received from wood and the second connecting member, characterized in that.

  As described above, the rotating body constituting the operating member can insert the first connecting member and the second connecting member from both sides in the axial direction, the first projecting portion is fitted into the first spiral groove, and the second projecting portion is inserted. Is inserted into the second spiral groove, the connection is maintained, and the rotational force applied to the rotating body by the force received from the first connecting member and the second connecting member is applied to the rotating body. When is released, the operating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member move away from each other, When the operating member moves to the release position, the connection means that the connection between the first connection member and the second connection member is released can be configured.

(7) In the present invention, in the above-described tightening member coupling structure, the coupling means constitutes the actuating member and forms a cylindrical shape and is rotatable around the cylindrical axis. And a support for rotatably supporting the rotating body, wherein the first connecting member and the second connecting member each have a hollow cylindrical portion that is fitted on both sides of the rotating body, A first spiral groove is formed on one of the inner peripheral surface of the hollow cylindrical portion of the one connecting member and the outer peripheral surface of the rotating body, and the first protrusion that can be fitted into the first spiral groove is formed on the other. A second spiral groove is formed on one of the inner peripheral surface of the hollow cylindrical portion of the second connecting member and the outer peripheral surface of the rotating body, and a second protrusion that can be fitted into the second spiral groove is formed on the other. The rotating body is rotated in the release direction by the force received from the first connecting member and the second connecting member. Force is applied, characterized in that.

  As described above, the first connecting member and the second connecting member can be fitted on the rotating body constituting the operating member from both sides in the axial direction, the first projecting portion is fitted in the first spiral groove, and the second projecting portion is inserted. The connection is maintained by fitting the portion into the second spiral groove, and the rotational force applied to the rotating body by the force received from the first connecting member and the second connecting member is applied to the rotating body. When the lock is released, the operating member moves in the direction of the release position due to the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member move away from each other. When the actuating member moves to the release position, the connection means that the connection between the first connection member and the second connection member is released ”can be configured.

(8) Further, in the present invention, in the above-described tightening member connection structure, the connecting means constitutes the operating member, and the direction of tension acting on the first connecting member and the second connecting member. A rotating body that is rotatable about a rotation axis in a direction substantially orthogonal to the first connecting member and a plane that faces the second connecting member, and a support body that rotatably supports the rotating body, A first spiral groove and a second spiral groove are formed in a double spiral shape on the plane of the rotating body, and the first connecting member can be fitted into the first spiral groove. A protrusion is formed, a first protrusion that can be fitted into the second spiral groove is formed on the second connecting member, and the rotating body receives the force from the first connecting member and the second connecting member. A rotating force in a release direction is applied to the rotating body.

  Thus, the double spiral first spiral groove and the second spiral groove formed on the rotating body constituting the operating member, the first protrusion formed on the first connection member, and the second connection member Since the connection is maintained by fitting the formed second protrusion, and the rotating body receives a rotational force in the releasing direction from the force received from the first connecting member and the second connecting member. When the lock by is released, the operating member moves in the direction of the release position due to the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member move away from each other. Then, when the operating member moves to the release position, the connection means that the connection between the first connection member and the second connection member is released ”can be configured.

  ADVANTAGE OF THE INVENTION According to this invention, the impact by the expansion-contraction vibration of the to-be-fastened body which generate | occur | produces when the connection of the edge parts of fastening members, such as a clamp band, is cancelled | released can be relieve | moderated significantly.

It is a figure which shows the structure of the connection structure of the clamping member concerning the reference example 1. FIG. It is a figure which shows the structure of the connection structure of the clamping member concerning the reference example 2. FIG. It is a figure which shows the structure of the connection structure of the clamping member concerning the reference example 2, Comprising: The II sectional view taken on the line of FIG. 2, and the II-II sectional view are shown. It is a figure which shows the structure of the connection structure of the fastening member concerning 1st Embodiment of this invention. It is a figure which shows the structure of the connection structure of the clamping member concerning the reference example 3. FIG. It is a figure which shows the structure of the connection structure of the clamping member concerning the reference example 3, Comprising: The III-III sectional view taken on the line of FIG. 5, and the IV-IV sectional view are shown. It is a figure which shows the structure of the connection structure of the fastening member concerning 2nd Embodiment of this invention. It is a figure which shows the structure of the connection structure of the fastening member concerning 3rd Embodiment of this invention. It is a figure which shows the structure of the connection structure of the fastening member concerning 4th Embodiment of this invention. It is a figure which shows the structure of the conventional coupling device, Comprising: The rocket main body and the artificial satellite are shown in the state couple | bonded by the coupling device. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a figure which shows the conventional connection structure.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

[Reference Example 1]
1A and 1B are diagrams showing a configuration of a fastening member connection structure 1 according to Reference Example 1, in which FIG. 1A shows a connected state and FIG. 1B shows a released state.
The connecting structure 1 is wound around a to-be-clamped body (not shown) (for example, the coupling portion between the rocket body and the satellite described above) and tightens a to-be-clamped body (not shown) (for example, the above-mentioned). The ends of the clamp band) are releasably connected.
As shown in FIG. 1, the connecting structure 1 releases the first connecting member 2 and the second connecting member 4 that are connected to the end portions of the fastening member, and the first connecting member 2 and the second connecting member 4. And connecting means 6 for enabling connection.

In this reference example, the first connecting member 2 includes a connecting portion 7 connected to one end portion of the fastening member, and an extension portion 9 connected to the connecting portion 7 via a pin 8 so as to be rotatable. Consists of. A pin-like engagement piece 17 is provided at the tip of the extension portion 9.
The second connecting member 4 includes a connecting portion 10 connected to the other end portion of the fastening member, and an extension portion 12 rotatably connected to the connecting portion 10 via a pin 11. As shown in the drawing, the tension (tensile load) from the tightening member acts on the first connecting member 2 and the second connecting member 4. The symbol L is a tension line.

The connecting means 6 has an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In this reference example, the actuating member has a hook portion 18 that can be engaged with the engaging piece 17 of the first connecting member 2, and a position for maintaining the engagement (a restraining position) and a position for releasing the engagement ( The hook member 14 is rotatably connected to the second connecting member 4 via a pin 19 so as to be movable between the release position and the release position. The hook member 14 has a lever portion 20 extending from the hook portion 18.

The lever portion 20 of the hook member 14 is formed with an insertion hole 22 into which a lock pin 21 constituting a part of the lock means 15 is inserted in the connected state (A). When the lock pin 21 is inserted, the hook member 14 is restrained at the position (A). Thus, the engagement piece 17 of the first connection member 2 and the hook portion 18 of the hook member 14 are engaged so as to maintain the connection between the first connection member 2 and the second connection member 4. When the first connecting member 2 and the second connecting member 4 are connected, the rotation center of the hook member 14 (the position of the pin 19) and the position of the engaging piece 17 are perpendicular to the tension line L (see FIG. In the vertical direction).
With such a configuration, the hook member 14 is given a rotational force in the release direction (in the direction of arrow A in FIG. 1) by the force received from the first connecting member 2 and the second connecting member 4.

The locking means 15 can be constituted by, for example, a lock pin 21 and a pyrotechnic (not shown) such as a pyrotechnic built-in bolt for detaching the lock pin 21 from the insertion hole 22. With such a configuration, in a state where the lock pin 21 is inserted into the insertion hole 22 (FIG. 1A), the hook member 14 is restrained at the restraining position, and the lock pin 21 is detached from the insertion hole 22 (FIG. 1). In (B)), the restraint of the hook member 14 can be released.
Note that the locking unit 15 may have other configurations as long as it has a function of locking the hook member 14 in a releasable position.

  In the connection structure 1 configured as described above, the hook member 14 is received from the first connection member 2 and the second connection member 4 when the lock by the lock means 15 is released from the connection state of FIG. The first connecting member 2 and the second connecting member 4 move away from each other while rotating in the release direction (the direction of arrow A in FIG. 1) by the force. As shown in FIG. 1B, when the hook member 14 is rotated to the release position, the engagement between the engagement piece 17 of the first connection member 2 and the hook portion 18 of the hook member 14 is disengaged, and the first connection. The connection between the member 2 and the second connecting member 4 is released.

  In this way, when the lock by the lock means 15 is released, the hook member 14 moves to the release position by the force received from the first connecting member 2 and the second connecting member 4 (component force of the tension of the tightening member). Since the connection between the first connecting member 2 and the second connecting member 4 is released, the connection between the ends of the tightening member is thereby released. In the conventional connection structure described above, the bolt is instantaneously cut (several tens of microseconds) by the blade. However, according to the reference example 1, the lock by the lock means 15 is released, and the hook member 14 (actuating member) Since the first connection member 2 and the second connection member 4 are separated while being braked while moving to the release position, and then the connection is released, the connection is released more slowly (for example, 1 to several msec) than the conventional connection structure. The connection is released. As a result of the hook member (actuating member) 14 functioning as a braking means in this manner, the elastic energy release speed of the clamped body is lower than that of the conventional connecting structure, so that the impact caused by the stretching vibration of the clamped body is greatly increased. Can be relaxed.

[Reference Example 2]
2A and 2B are diagrams showing a configuration of a fastening member connection structure 1 according to Reference Example 2, in which FIG. 2A shows a connected state, and FIG. 2B shows a released state. 3A is a cross-sectional view taken along the line II of FIG. 2A, and FIG. 3B is a cross-sectional view taken along the line II-II of FIG.
As shown in FIGS. 2 and 3, the connecting structure 1 includes a first connecting member 2 and a second connecting member 4 that are respectively connected to end portions of a fastening member (not shown), a first connecting member 2, Connecting means 6 that releasably connects the second connecting member 4 is provided.

In this reference example, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of the tightening member (for example, bolts), and an engagement protrusion of the slider 24 described later. Engaging recesses 27 and 28 that engage with the portions 25 and 26 are formed.
The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In this reference example, the operating member can be engaged with both the first connecting member 2 and the second connecting member 4 so as to maintain the connection, and the engagement maintaining position (restraint position) and the engagement are released. The slider 24 is slidable between a position to be released (release position). Engagement convex portions 25 and 26 that engage with the engagement concave portions 27 and 28 of the first connecting member 2 and the second connecting member 4 are formed on the slider 24. The slider 24 is formed with a locking recess 30 into which a lock pin 29 described later can be inserted.

  The connecting means 6 further includes a support 32 that supports the slider 24 in a slidable manner. The support 32 prevents the movement of the first connecting member 2 and the second connecting member 4 when the slider 24 is in a position where the slider 24 maintains the engagement. However, it is configured to support in a stationary state.

  The engaging recesses 27 and 28 of the first connecting member 2 and the second connecting member 4 are respectively formed with tapered surfaces 27 a and 28 a, and the engaging protrusions 25 and 26 of the slider 24 are connected to the first connecting member 2 and the second connecting member 4. Tapered surfaces 25 a and 26 a that match the tapered surfaces 27 a and 28 a of the member 2 and the second connecting member 4 are formed, and thereby the slider 24 is released by the force received from the first connecting member 2 and the second connecting member 4. A moving force in the direction (downward in the figure) is applied.

The locking means 15 can be constituted by, for example, a lock pin 29 and a pyrotechnic (such as a gunpowder built-in bolt) for releasing the lock pin 29 from the locking recess 30.
With this configuration, in the state where the lock pin 29 is inserted into the insertion hole (FIG. 2A), the slider 24 is restrained at the restraining position, and the lock pin 29 is pulled out of the insertion hole (in FIG. 2B). The restriction of the slider 24 is released.
The lock unit 15 may have another configuration as long as it has a function of locking the slider 24 in a releasable position.

  In the connection structure 1 configured as described above, the slider 24 receives the force from the first connection member 2 and the second connection member 4 when the lock by the lock unit 15 is released from the connection state of FIG. As a result, the first connecting member 2 and the second connecting member 4 move away from each other in the release direction (downward in FIG. 2). As shown in FIG. 2B, when the slider 24 has moved to the release position, the slider 24 is disengaged from the first connecting member 2 and the second connecting member 4, and the first connecting member 2 and the second connecting member are disengaged. The connection with the member 4 is released.

As described above, when the lock by the lock means 15 is released, the operating member moves to the release position by the force received from the first connecting member 2 and the second connecting member 4 (component force of the tension of the tightening member). Since the connection between the first connection member 2 and the second connection member 4 is released, the connection between the end portions of the tightening member is released.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

[First Embodiment]
4A and 4B are diagrams showing the configuration of the fastening member connection structure 1 according to the first embodiment of the present invention, in which FIG. 4A shows a connected state and FIG. 4B shows a released state.
As shown in FIG. 4, the connecting structure 1 includes a first connecting member 2 and a second connecting member 4 respectively connected to end portions of a tightening member (not shown), and the first connecting member 2 and the second connecting member. Connecting means 6 for releasably connecting the member 4 is provided.
In the present embodiment, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of the tightening member (for example, bolts).

The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In the present embodiment, the operating member is a screw rod 36 having a screw portion. The connecting means 6 includes a rotating body 38 that is screwed onto the screw rod 36, and a housing 40 that has a through hole 39 that supports the rotating body 38 in a rotatable manner and allows the screw rod 36 to protrude and retract. The mechanism composed of the screw rod 36 and the rotating body 38 is a ball screw mechanism, and a rotational force in the releasing direction (arrow C direction in the figure) is applied by the force received by the rotating body 38 from the screw rod 36 and the housing 40.

The housing 40 is connected to the first connecting member 2. Tapered engaging portions 41 and 42 that can be engaged with each other so as to maintain the connection are formed at the leading end portion of the screw rod 36 and the leading end portion of the second connecting member 4. The engagement is maintained when the engaging portions 41 and 42 are located in the through hole 39, and the engagement is released when the engaging portions 41 and 42 are located outside the through hole 39. . The position of the screw rod 36 when the engaging portion 41 is located in the through hole 39 corresponds to the “restraint position”, and the position of the screw rod 36 when the engaging portion 41 is located outside the through hole 39 is It corresponds to the above “release position”.
In addition, the 1st connection member 2 and the housing 40 may be a member comprised integrally.

In the present embodiment, the rotating body 38 includes a nut member 43 having a flange portion screwed to the screw rod 36, and a hollow cylindrical weight member 44 and a shaft member 45 disposed so as to sandwich the flange portion of the nut member 43. It consists of. The nut member 43, the weight member 44, and the shaft member 45 are integrally connected by a fastening member (for example, a bolt) 46. The weight member 44 is formed with a locking recess 47 into which a lock pin 48 described later is inserted. A bearing 49 is interposed between the shaft member 45 and the housing 40.
The nut member 43, the weight member 44, and the shaft member 45 may be integrally formed members.

The lock unit 15 includes a lock pin 48 and a drive unit (not shown) for detaching the lock pin 48 from the locking recess 47. As the driving means, for example, a pyrotechnic (such as a gunpowder built-in bolt) can be used.
With this configuration, in a state where the lock pin 48 is inserted into the locking recess 47 (FIG. 4A), the rotation of the rotating body 38 is restrained, so that the movement of the screw rod 36 is restrained. In the state of being disengaged from the locking recess (FIG. 4B), the restraint of the screw rod 36 is released by releasing the restraint of the rotating body 38.
Note that the lock unit 15 may have another configuration as long as it has a function of locking the screw rod 36 to the restrained position via the rotating body 38 so as to be releasable.

In the connecting structure 1 configured as described above, when the lock by the locking unit 15 is released from the state of FIG. 4A, the rotating body 38 becomes rotatable, so that the rotating body 38 and the screw rod 36 are connected. The rotating body 38 is rotated by the acting axial load in the opposite direction, and the housing 40 and the rotating body 38 are moved leftward in the figure, and the screw rod 36 is moved rightward in the figure.
As shown in FIG. 4B, when the engaging portions 41 and 42 between the screw rod 36 and the first connecting member 2 have moved to a position (release position) outside the through hole 39, the screw rod 36 and The engagement with the first connecting member 2 is released, whereby the connection between the first connecting member 2 and the second connecting member 4 is released.

Thus, when the lock by the lock means 15 is released, the rotating body 38 rotates using the component force of the tension of the tightening member, and the screw rod 36 (actuating member) moves to the release position, Since the connection of the 1st connection member 2 and the 2nd connection member 4 is cancelled | released, the connection of the edge parts of a clamping member is cancelled | released by this.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

[Reference Example 3]
5A and 5B are diagrams showing the configuration of the fastening member connection structure 1 according to Reference Example 3, in which FIG. 5A shows a connected state and FIG. 5B shows a released state. 6A is a cross-sectional view taken along line III-III in FIG. 5A, and FIG. 6B is a cross-sectional view taken along line IV-IV in FIG. 5B.
As shown in FIGS. 5 and 6, the connection structure 1 includes a first connection member 2 and a second connection member 4 that are connected to end portions of the tightening member, and a first connection member 2 and a second connection member 4. And connecting means 6 for releasably connecting them.
In this reference example, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of a tightening member (not shown) (for example, bolts).

The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In this reference example, the actuating member is a rotating body 51 that has a hollow cylindrical shape, into which the first connecting member 2 and the second connecting member 4 can be inserted from both sides in the axial direction, and that can rotate around the cylindrical axis. is there. Moreover, the connection means 6 is provided with the support body 52 which supports the rotary body 51 rotatably. A bearing 53 is interposed between the rotating body 51 and the support body 52.

The rotating body 51, the first connecting member 2, and the second connecting member 4 are the first connecting member 2 and the second connecting member 4 when the position of the rotating body 51 around the axis is at the first position (restraint position). The first connecting member 2 and the second connecting member 4 can be separated from the rotating body 51 when the moving body 51 is prevented from being detached from the rotating body 51 and the position of the rotating body 51 is at the second position (release position). Has been.
Specifically, one or a plurality of keys 54 and 55 are formed in the circumferential direction at portions of the first connecting member 2 and the second connecting member 4 that are inserted into the rotating body 51. Further, the inner surface of the rotating body 51 interferes with the keys 54 and 55 of the first connecting member 2 and the second connecting member 4 and the first connecting member 2 and the second connecting member 4 are detached from the rotating body 51. And the interference between the first connecting member 2 and the keys 54 and 55 of the second connecting member 4 is released when the position around the axis of the rotating body 51 changes, and the first connecting member 2 and the first connecting member 2 Two or more protrusions 56 and 57 that allow the linking member 4 to be detached from the rotating body 51 are formed in the circumferential direction in each of the portions where the first linking member 2 and the second linking member 4 are inserted. Has been.

  Guide sleeves 58 and 59 for guiding the movement of the first connecting member 2 and the second connecting member 4 in the axial direction are attached to both sides of the support body 52 in the axial direction.

  In addition, the surfaces of the keys 54 and 55 of the first connecting member 2 and the second connecting member 4 on the side that interferes with the protrusions of the rotating body 51 are tapered surfaces 54a and 55a. The rotational force in the release direction (arrow D direction in the figure) is applied by the force received from the first connecting member 2 and the second connecting member 4.

As shown in FIG. 6, in this reference example, the locking means 15 includes a ball 61 that engages with a locking recess 60 formed in the rotating body 51 to prevent the rotating body 51 from rotating, and the ball 61 is a rotating body. 51, a ball lock member 62 capable of restraining and moving the ball 61 to a position where the ball 51 is blocked and releasing the restraint of the ball 61, and a driving means 63 for moving the ball lock member 62. As the driving means 63, for example, a pyrotechnic (such as a gunpowder built-in bolt) can be used.
With this configuration, in a state where the ball is engaged with the engagement recess 60 of the rotating body 51 and the movement of the ball 61 is restricted by the ball lock member 62 (FIG. 6A), the rotation of the rotating body 51 is restricted. The ball locking member 62 is moved by the driving means, the restraint of the ball 61 is released, and the restraint of the rotating body 51 is released in the state where the ball 61 is released from the locking recess 60 of the rotating body 51 (FIG. 6B). It has become so.
The lock unit 15 may have another configuration as long as it has a function of locking the rotating body 51 in a releasable position.

In the connection structure 1 configured as described above, when the lock by the locking unit 15 is released from the connection state of FIG. 5A, the rotation body 51 becomes rotatable, and thus the rotation body 51 is the first connection. The force received from the member 2 and the second connecting member 4 rotates in the direction of arrow D in the figure, and the first connecting member 2 moves to the left in the figure, and the second connecting member 4 moves to the right in the figure.
Then, as shown in FIG. 5B, the rotary body 51 is moved to a position (release position) where the keys 54 and 55 of the first connection member 2 and the second connection member 4 do not interfere with the protrusions 56 and 57 of the rotary body 51. Is rotated, the first connecting member 2 and the second connecting member 4 are detached from the rotating body 51, whereby the connection between the first connecting member 2 and the second connecting member 4 is released.

Thus, when the lock by the locking means 15 is released, the rotating body 51 (actuating member) is released by the force received from the first connecting member 2 and the second connecting member 4 (component of the tension of the tightening member). Since it rotates to a position and the connection of the 1st connection member 2 and the 2nd connection member 4 is cancelled | released, the connection of the edge parts of a clamping member is cancelled | released by this.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

[Second Embodiment]
FIGS. 7A and 7B are diagrams showing the configuration of the fastening member connection structure 1 according to the second embodiment of the present invention, in which FIG. 7A shows a connected state and FIG. 7B shows a released state.
As shown in FIG. 7, the connecting structure 1 includes a first connecting member 2 and a second connecting member 4 respectively connected to end portions of a tightening member (not shown), and the first connecting member 2 and the second connecting member. Connecting means 6 for releasably connecting the member 4 is provided.
In the present embodiment, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of the tightening member (for example, bolts).

The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In this embodiment, the actuating member is a rotating body 65 that has a hollow cylindrical shape, into which the first connecting member 2 and the second connecting member 4 can be inserted from both sides in the axial direction, and that can rotate around the cylindrical axis. is there. Moreover, the connection means 6 is provided with the support body 66 which supports the rotary body 65 rotatably.

The portions of the first connecting member 2 and the second connecting member 4 that are inserted into the rotating body 65 have a cylindrical shape.
A first spiral groove 67 is formed on the outer peripheral surface of the cylindrical portion of the first connecting member 2, and can be fitted into the first spiral groove 67 on the inner peripheral surface of the rotating body 65 into which the first connecting member 2 is inserted. A first protrusion 69 is formed.
A second spiral groove 68 is formed on the outer peripheral surface of the cylindrical portion of the second connecting member 4, and can be fitted into the second spiral groove 68 on the inner peripheral surface of the rotating body 65 into which the second connecting member 4 is inserted. A second protrusion 70 is formed.

The first spiral groove 67 and the second spiral groove 68 extend to the tips of the first connecting member 2 and the second connecting member 4, respectively, and the first connecting member 2 and the second connecting member 4 are completely detached from the rotating body 65. It can be done.
In this embodiment, two sets of the first spiral groove 67 and the first projecting portion 69 and two sets of the second spiral groove 68 and the second projecting portion 70 are provided. It may be.

  Thus, since the first spiral groove 67, the first protrusion 69, the second spiral groove 68, and the second protrusion 70 are formed, the rotating body 65 is separated from the first connection member 2 and the second connection member 4. A rotational force in the release direction (the direction of arrow E in the figure) is applied by the force received.

Guide sleeve portions 66a and 66b for guiding the movement of the first connecting member 2 and the second connecting member 4 in the axial direction are provided on both sides in the axial direction of the support 66. The guide sleeve portions 66a and 66b are provided. May be composed of separate parts.
The locking means 15 is the same as that of the reference example 3, but may have other configurations as long as it has a function of locking the rotating body 65 in a releasable position.

In the connection structure 1 configured as described above, when the lock by the lock unit 15 is released from the connection state of FIG. 7A, the rotation body 65 becomes rotatable, and thus the rotation body 65 is the first connection. The first coupling member 2 moves to the left in the figure and the second coupling member 4 moves to the right in the figure while rotating in the direction of the arrow by the force received from the member 2 and the second coupling member 4.
7B, when the first protrusion 69 and the second protrusion 70 of the rotator 65 reach the tips of the first spiral groove 67 and the second spiral groove 68, respectively, the rotator The first connecting member 2 and the second connecting member 4 are detached from 65, and thereby the connection between the first connecting member 2 and the second connecting member 4 is released.

Thus, when the lock by the locking means 15 is released, the rotating body 65 (actuating member) is released by the force received from the first connecting member 2 and the second connecting member 4 (component force of the tension of the tightening member). Since it rotates to a position and the connection of the 1st connection member 2 and the 2nd connection member 4 is cancelled | released, the connection of the edge parts of a clamping member is cancelled | released by this.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

  Instead of the above-described configuration, the first spiral groove and the second spiral groove are formed in the rotating body 65, the first protrusion is formed in the first connection member 2, and the second protrusion is the second connection member 4. Even if it is formed, the same effect can be obtained.

[Third Embodiment]
FIGS. 8A and 8B are diagrams showing the configuration of the fastening member connection structure 1 according to the third embodiment of the present invention, in which FIG. 8A shows a connected state and FIG. 8B shows a released state.
As shown in FIG. 8, the connection structure 1 includes a first connection member 2 and a second connection member 4 respectively connected to end portions of a fastening member (not shown), and the first connection member 2 and the second connection. Connecting means 6 for releasably connecting the member 4 is provided.
In the present embodiment, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of the tightening member (for example, bolts).

The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In the present embodiment, the operating member is a rotating body 71 that has a cylindrical shape and is rotatable around a cylindrical axis. Moreover, the connection means 6 is provided with the support body 72 which supports the rotary body 71 rotatably.

The first connecting member 2 and the second connecting member 4 have hollow cylindrical portions 73 and 74 that are fitted on both sides of the rotating body 71, respectively.
A first spiral groove 75 is formed on the outer peripheral surface of the rotating body 71 near the first connecting member 2, and a first spiral groove 75 can be fitted into the inner peripheral surface of the hollow cylindrical portion of the first connecting member 2. A protruding portion 77 is formed.
A second spiral groove 76 is formed on the outer peripheral surface of the rotating body 71 near the second connecting member 4, and the second spiral groove 76 can be fitted in the inner peripheral surface of the hollow cylindrical portion of the second connecting member 4. A protruding portion 78 is formed.

Each of the first spiral groove 75 and the second spiral groove 76 extends to both ends of the rotating body 71 so that the first connecting member 2 and the second connecting member 4 can be completely detached from the rotating body 71.
In this embodiment, two sets of the first spiral groove 75 and the first projecting portion 77 and two sets of the second spiral groove 76 and the second projecting portion 78 are provided. It may be.

  Thus, since the first spiral groove 75, the first protrusion 77, the second spiral groove 76, and the second protrusion 78 are formed, the rotating body 71 is separated from the first connection member 2 and the second connection member 4. A rotational force in the release direction (the direction of arrow F in the figure) is applied by the force received.

Guide sleeve portions 72a and 72b for guiding the movement of the first connecting member 2 and the second connecting member 4 in the axial direction are provided on both sides in the axial direction of the support body. , May be composed of separate parts.
The locking means 15 may be the same as that of the reference example 3, but may have other configurations as long as it has a function of locking the rotating body 71 in a releasable position.

In the connection structure 1 configured as described above, when the lock by the lock unit 15 is released from the connection state of FIG. 8A, the rotary body 71 becomes rotatable, and thus the rotary body 71 is connected to the first connection. The force received from the member 2 and the second connecting member 4 rotates in the direction of arrow F in the figure, and the first connecting member 2 moves to the left in the figure, and the second connecting member 4 moves to the right in the figure.
8B, the first projecting portion 77 of the first connecting member 2 and the second projecting portion 78 of the second connecting member 4 are the first spiral groove 75 and the second spiral of the rotating body 71, respectively. When the tip of the groove 76 is reached, the first connecting member 2 and the second connecting member 4 are detached from the rotating body 71, thereby releasing the connection between the first connecting member 2 and the second connecting member 4.

Thus, when the lock by the locking means 15 is released, the rotating body 71 (actuating member) is released by the force received from the first connecting member 2 and the second connecting member 4 (component of the tension of the tightening member). Since it rotates to a position and the connection of the 1st connection member 2 and the 2nd connection member 4 is cancelled | released, the connection of the edge parts of a clamping member is cancelled | released by this.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

  In addition, it replaces with the structure mentioned above, the 1st spiral groove is formed in the 1st connection member 2, the 2nd spiral groove is formed in the 2nd connection member 4, and the 1st protrusion part and the 2nd protrusion part are the rotary bodies 71. Even if it is formed, the same effect can be obtained.

[Fourth Embodiment]
FIGS. 9A and 9B are diagrams showing the configuration of the fastening member coupling structure 1 according to the fourth embodiment of the present invention, in which FIG. 9A shows a coupled state, FIG. 9B shows a state during a release operation, and FIG. Indicates the state.
As shown in FIG. 9, the connection structure 1 includes a first connection member 2 and a second connection member 4 respectively connected to end portions of a fastening member (not shown), and the first connection member 2 and the second connection. Connecting means 6 for releasably connecting the member 4 is provided.
In the present embodiment, the first connecting member 2 and the second connecting member 4 are respectively connected to one end and the other end of the tightening member (for example, bolts).

The connecting means 6 includes an operating member that can move between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means 15 for releasably locking the operating member at the restraining position.
In the present embodiment, the actuating member is rotatable about a rotation axis in a direction substantially perpendicular to the direction of tension acting on the first connecting member 2 and the second connecting member 4 (in the drawing, the direction perpendicular to the paper surface). The rotating body 80 has a flat surface 80 a that faces the first connecting member 2 and the second connecting member 4. In the present embodiment, the rotating body 80 has a disk shape. Moreover, the connection means 6 is provided with the support body 81 which supports the rotary body 80 rotatably.

A first spiral groove 82 and a second spiral groove 83 are formed in a double spiral shape on the flat surface 80a of the rotating body 80 (a disk surface facing the first connection member 2 and the second connection member 4). .
The first connecting member 2 is formed with a first protrusion 85 that can be fitted into the first spiral groove 82, and the second connecting member 4 is formed with a second protrusion 86 that can be fitted into the second spiral groove 83. Yes. In FIG. 9, the first projecting portion 85 and the second projecting portion 86 are indicated by broken lines because they are in a position where they are blocked by the first connecting member 2 and the second connecting member 4.
Each of the first spiral groove 82 and the second spiral groove 83 extends to the outer peripheral portion of the rotating body 80 so that the first connecting member 2 and the second connecting member 4 can be completely detached from the rotating body 80.

  Thus, since the first spiral groove 82, the first protrusion 85, the second spiral groove 83, and the second protrusion 86 are formed, the rotating body 80 is separated from the first connecting member 2 and the second connecting member 4. A rotational force in the release direction (the direction of arrow G in the figure) is applied by the force received.

  Guide sleeve portions 81a and 81b are provided on both sides of the support to guide the movement of the first connecting member 2 and the second connecting member 4 in the axial direction. The guide sleeve portions 81a and 81b are separately provided. You may be comprised with components.

The locking means 15 in this embodiment is the same as that in the reference example 3 described above. That is, the locking means 15 engages with an engagement recess 88 formed in the rotating body 80 to restrain the rotation of the rotating body 80 and restrains the ball 61 at a position where the ball 61 blocks the rotating body 80. And a ball lock member 62 that can move and release the restraint of the ball 61, and a drive means 63 that moves the ball lock member 62. As the driving means 63, for example, a pyrotechnic (such as a gunpowder built-in bolt) can be used.
With this configuration, in a state where the ball 61 is engaged with the engagement recess 88 of the rotating body 80 and the movement of the ball 61 is restrained by the ball lock member 62 (FIG. 9A), the rotation of the rotating body 80 is restrained. When the ball locking member 62 is moved by the driving means 63, the restraint of the ball 61 is released, and the ball 61 is disengaged from the engaging recess 88 of the rotating body 80 (FIGS. 9B and 9C), it rotates. The restraint of the body 80 is released.
Note that the lock unit 15 may have another configuration as long as it has a function of locking the rotating body 80 in a releasable position.

In the connection structure 1 configured as described above, when the lock by the locking unit 15 is released from the connection state of FIG. 9A, the rotary body 80 becomes rotatable, so the rotary body 80 is the first connection. The force received from the member 2 and the second connecting member 4 rotates in the direction of the arrow in the figure, and the first connecting member 2 moves to the left in the figure, and the second connecting member 4 moves to the right in the figure (FIG. 9B )).
9C, the first projecting portion 85 of the first connecting member 2 and the second projecting portion 86 of the second connecting member 4 are the first spiral groove 82 and the second projecting portion 86 of the rotating body 80, respectively. When the tip of the spiral groove 83 (the outer peripheral portion of the rotating body 80) is reached, the first connecting member 2 and the second connecting member 4 are detached from the rotating body 80, whereby the first connecting member 2 and the second connecting member are separated. 4 is released.

Thus, when the lock by the locking means 15 is released, the rotating body 80 (actuating member) is released by the force (component force of the tension of the fastening member) received from the first connecting member 2 and the second connecting member 4. Since it rotates to a position and the connection of the 1st connection member 2 and the 2nd connection member 4 is cancelled | released, the connection of the edge parts of a clamping member is cancelled | released by this.
Therefore, as in Reference Example 1, the elastic energy release speed of the clamped body is lower than that of the conventional connection structure, so that the impact due to the stretching vibration of the clamped body can be greatly reduced.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. . The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

DESCRIPTION OF SYMBOLS 1 Connection structure of clamping member 2 1st connection member 4 2nd connection member 6 Connection means 15 Lock means 14 Hook member (operation member)
24 Slider (actuating member)
36 Screw rod (actuating member)
38 Rotating body 40 Housing 21, 29, 48
Lock pin 51, 65, 71, 80
Rotating body (actuating member)
32, 52, 66, 72, 81 Support 61 Ball 62 Ball lock member 63 Driving means 67, 75, 82
1st spiral groove 68,76,83
Second spiral groove 69, 77, 85
First protrusions 70, 78, 86
Second protrusion

Claims (4)

A tightening member connection structure for releasably connecting the ends of the tightening member that is wound around the tightened body and tightens the tightened body,
A first connecting member and a second connecting member respectively connected to end portions of the tightening member;
Connecting means for releasably connecting the first connecting member and the second connecting member;
The connecting means includes an operating member movable between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means for releasably locking the operating member at the restraining position,
When the lock by the locking means is released, the actuating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member. When the members move in directions away from each other and the actuating member moves to the release position, the connection between the first connection member and the second connection member is released,
The connecting means constitutes the operating member and is rotatable about a rotation axis in a direction substantially perpendicular to a tension direction acting on the first connecting member and the second connecting member. A rotating body having a connecting member and a plane facing the second connecting member, and a support body that rotatably supports the rotating body,
On the plane of the rotating body, a first spiral groove and a second spiral groove are formed in a double spiral shape,
The first connecting member is formed with a first protrusion that can be fitted into the first spiral groove, and the second connecting member is formed with a first protrusion that can be fitted into the second spiral groove.
A fastening member coupling structure, wherein a rotational force in a releasing direction is applied to the rotating body by a force received by the rotating body from the first coupling member and the second coupling member. A tightening member connection structure for releasably connecting the ends of the tightening member that is wound around the tightened body and tightens the tightened body,
A first connecting member and a second connecting member respectively connected to end portions of the tightening member;
Connecting means for releasably connecting the first connecting member and the second connecting member;
The connecting means includes an operating member movable between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means for releasably locking the operating member at the restraining position,
When the lock by the locking means is released, the actuating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member. When the members move in directions away from each other and the actuating member moves to the release position, the connection between the first connection member and the second connection member is released,
The connecting means constitutes the actuating member, forms a hollow cylinder, and the first connecting member and the second connecting member can be inserted from both sides in the axial direction, respectively, and rotate around a cylindrical axis. A rotating body capable of rotating, and a support body that rotatably supports the rotating body,
The portions of the first connecting member and the second connecting member that are inserted into the rotating body are cylindrical.
A first spiral groove is formed on one of the outer peripheral surface of the cylindrical portion of the first connecting member and the inner peripheral surface of the rotating body, and a first protrusion that can be fitted into the first spiral groove is formed on the other. And
A second spiral groove is formed on one of the outer peripheral surface of the cylindrical portion of the second connecting member and the inner peripheral surface of the rotating body, and a second protrusion that can be fitted into the second spiral groove is formed on the other. And
A fastening member coupling structure, wherein a rotational force in a releasing direction is applied to the rotating body by a force received by the rotating body from the first coupling member and the second coupling member. A tightening member connection structure for releasably connecting the ends of the tightening member that is wound around the tightened body and tightens the tightened body,
A first connecting member and a second connecting member respectively connected to end portions of the tightening member;
Connecting means for releasably connecting the first connecting member and the second connecting member;
The connecting means includes an operating member movable between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means for releasably locking the operating member at the restraining position,
When the lock by the locking means is released, the actuating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member. When the members move in directions away from each other and the actuating member moves to the release position, the connection between the first connection member and the second connection member is released,
The connecting means comprises the rotating member that constitutes the actuating member and is rotatable around the cylindrical axis, and a support body that rotatably supports the rotating body,
The first connecting member and the second connecting member each have a hollow cylindrical portion that is fitted on both sides of the rotating body,
A first spiral groove is formed on one of the inner peripheral surface of the hollow cylindrical portion of the first connecting member and the outer peripheral surface of the rotating body, and a first protrusion that can be fitted into the first spiral groove is formed on the other. And
A second spiral groove is formed on one of the inner peripheral surface of the hollow cylindrical portion of the second connecting member and the outer peripheral surface of the rotating body, and a second protrusion that can be fitted into the second spiral groove is formed on the other. And
A fastening member coupling structure, wherein a rotational force in a releasing direction is applied to the rotating body by a force received by the rotating body from the first coupling member and the second coupling member. A tightening member connection structure for releasably connecting the ends of the tightening member that is wound around the tightened body and tightens the tightened body,
A first connecting member and a second connecting member respectively connected to end portions of the tightening member;
Connecting means for releasably connecting the first connecting member and the second connecting member;
The connecting means includes an operating member movable between a restraining position for maintaining the connection and a releasing position for releasing the connection, and a lock means for releasably locking the operating member at the restraining position,
When the lock by the locking means is released, the actuating member moves in the direction of the release position by the tension acting on the first connecting member and the second connecting member, and the first connecting member and the second connecting member. When the members move in directions away from each other and the actuating member moves to the release position, the connection between the first connection member and the second connection member is released,
The connecting means constitutes the operating member and has a screw rod having a threaded portion, a rotating body that is screwed to the screw rod, and a rotating member that is connected to the first connecting member and can rotate the rotating member. And a housing having a through-hole through which the screw rod can be projected and retracted, and a rotational force is applied to the rotating body by the force that the rotating body receives from the screw rod and the housing,
The locking means restrains the movement of the screw rod in the releasing direction via the rotating body so as to be releasable,
The front and rear end portions of the screw rod and the second connecting member are configured to be able to engage with each other so as to maintain the connection, and are engaged when the engaging portion in the engaged state is located in the through hole. The fastening member coupling structure is configured such that the engagement is released when the engagement is maintained and the engagement portion is located outside the through hole.

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