JP5509039B2 - Coil spring type one-way clutch device - Google Patents

Description

  The present invention relates to a remotely operated coil spring type one-way clutch device in which an end portion of a coil spring is operated by a pulling force of a string-like member to release a locked state.

  2. Description of the Related Art Conventionally, a coil spring type one-way clutch device used for rotating parts of various devices is known (see, for example, Patent Document 1).

JP 2007-215897 A

If the unlocking operation of the conventional coil spring type one-way clutch is performed by the pulling force of the string-like member, the one-way clutch can be remotely controlled with a simple mechanism. At present, a controllable one-way clutch has not yet appeared. However, when the unlocking operation of the one-way clutch is performed by the pulling force of the string-like member, the unlocking of the clutch can be surely performed by the unstable string-like member that curves in the slack direction. It is required to do. In the conventional coil spring type one-way clutch, there is no conventional technique focusing on this point.
An object of the present invention is to make it possible to reliably unlock a coil spring type one-way clutch with a string-like member.

In order to achieve the above object, the present invention provides a pair of hinge portions (20), (16) that are rotatable relative to each other, and one hinge portion (16) side of the pair of hinge portions (20), (16). A peripheral surface (22a) provided, and a coil spring (24) fitted and disposed on the peripheral surface (22a), and one end (24b) of the coil spring (24) The other hinge portion (16) of the pair of hinge portions (20), (16) is fixed to the other hinge portion (20) side of the hinge portions (20), (16), 20) The radial surface of the coil spring (24) is brought into close contact with the peripheral surface (22a) and fixed to the peripheral surface (22a) by a unidirectional rotational force with respect to 20), and the other end of the coil spring (24) When a tensile force acts on (24a), the coil spring A one-way clutch configured such that the radial surface of (24) is loosely adhered to the peripheral surface (22a) and the radial surface is freely rotatable with respect to the peripheral surface (22a); A string-like member (82) connected to the other end (24a) of the coil spring (24) of the clutch, and a string-like member (82) connected to the other end of the string-like member (82). An operation member (12) for operating in the pulling direction, and a bending portion (8) that is connected to the operation member (12) on one side and can change the bending angle at the intermediate portion, and the bending angle can be changed on the other side. And the other bent portion (4) is configured by the one-way clutch, and the bending rotation center axis (8) of the intermediate bent portion (8) is provided. L) Located on or in the vicinity thereof, the bending member (8) has the operating member ( In which the cord-like member (82) string-shaped member guide member having a guide portion for movably supporting the connecting (64) provided in 2).
According to the present invention, the operating member (12) includes a pulley (70) rotatably supported at the tip of the arm (5), and a lever (74) connected to the pulley (70). The other end of the string-like member (82) is locked to the pulley (70), and the string-like member (82) is passed through the guide portion of the string-like member guide (64). 82) is guided to the one-way clutch of the other bent portion (4) of the arm (5).
Further, according to the present invention, the bent portion (8) of the intermediate portion of the arm (5) is configured by a one-way clutch, and the one-way clutch is paired with a pair of hinge portions (42) and (44) that are rotatable relative to each other. A peripheral surface (46a) provided on one hinge portion (44) side of the pair of hinge portions (42) and (44), and a coil spring (48) fitted and disposed on the peripheral surface (46a) One end (48a) of the coil spring (48) is fixed to the other hinge (42) side of the pair of hinges (42) (44), and the pair of hinges The radial surface of the coil spring (48) is brought into close contact with the peripheral surface (46a) by the rotational force in one direction with respect to the other hinge portion (44) of one hinge portion (42) in the portions (42) and (44). The coil spring is fixed to the peripheral surface (46a). When a tensile force acts on the other end (48a) of (48), the tight contact of the radial surface of the coil spring (48) with the peripheral surface (46a) is loosened, and the radial surface is against the peripheral surface (46a). The string member (80) is connected to the operation member (12), and the string member (80) is connected to the coil spring (48) of the bent portion (8) of the intermediate portion. It is connected to the other end (48a) for unlocking.

  In the present invention, the one-way clutch can be reliably unlocked by the string-like member.

It is a cross-sectional explanatory drawing of a tube holding device. It is a whole side view of a tube holding device. It is a front view same as the above. It is a longitudinal cross-section explanatory drawing of a bending part same as the above. FIG. 6 is a cross-sectional explanatory view of the operation member. It is a cross-sectional explanatory drawing of an operation member same as the above. It is sectional explanatory drawing of the bending part of a tube holding device. It is sectional explanatory drawing of the bending part of a tube holding device. It is an external view of the bending part of a tube holding device. It is an external view of the bending part of a tube holding device. It is an external view of the bending part of a tube holding device.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 2 shows a medical tube holding device, which includes a base 2, an arm 5 that is bendably connected to the base 2, a clutch operating member 12 attached to the distal end of the arm 5, and a distal attachment 14. The arm 5 includes a first arm 6 capable of changing a bending angle with respect to the base 2 around the first bent portion 4, and a second bent portion 8 with respect to the first arm 6. It is comprised from the 2nd arm 10 which can change bending | flexion angle (alpha) as a center.

The base portion 2 is composed of a shaft-like base arm 18 fixed to the second hinge portion 16 (see FIG. 8) of the first bent portion 4, and the base arm 18 is a support body (not shown). It is rotatably attached to the bearing. The said 1st arm 6 and the 2nd arm 10 are comprised by the hollow pipe-shaped member, and can comprise now the arrangement | positioning channel | path for string-like members inside. As shown in FIGS. 7 and 8, the first bent portion 4 includes a first hinge portion 20, a second hinge 16, a clutch sleeve 22, a coil spring 24, and a cover 26, which are unidirectional. The clutch is configured.

At the center of the inner surface of the disk portion 20a of the first hinge portion 20, a hinge shaft body 30 made of a bolt is fixed at one end by a nut 32 so as to be orthogonal to the longitudinal direction of the first arm 6. Has been. The second hinge portion 16 includes a tubular portion 16a and a plate-like portion 16b extending at a right angle to the central axis of the tubular portion 16a at one end of the tubular portion 16a. A base arm 18 is fixed to the portion. The tubular portion 16a is rotatably fitted to the hinge shaft body 30 so as not to move in the axial direction via a bush 34 fitted and fixed thereto.

A cylindrical clutch sleeve 22 is fitted and fixed to the outer peripheral surface of the tubular portion 16 a of the second hinge portion 16, and one end side of the sleeve 22 is on the inner surface of the disk portion 20 a of the first hinge portion 20. The inner circumferential surface 20c of the formed annular recess is rotatably fitted. The first hinge part 20 and the second hinge part 16 are connected to each other so as to be rotatable relative to the first arm 6 and a hinge shaft 30 set at a right angle to the base arm 18. An inner diameter portion of the coil spring 24 is closely fitted to the outer peripheral surface 22a of the clutch sleeve 22 and is disposed. A wire fitting 36 is fixed to an extended portion of one end portion 24a of the coil spring 24 that extends linearly for a predetermined length in the radial direction of the coil spring 24.

A ring-shaped portion 24 c is formed at an extension portion of the other end portion 24 b of the coil spring 24 that extends linearly for a predetermined length in the radial direction. A bolt 40 that is screwed into a screw hole 38 formed in the eccentric portion of the inner surface of the disk portion 20a of the first hinge portion 20 is inserted into the ring-shaped portion 24c. The part 24 c is fixed by being crimped to the wall surface of the eccentric part of the disk part 20 a of the first hinge part 20. The cover 26 is formed of a bottomed cylindrical body, and the bottom portion 26a is fixed to the plate-like portion 16b of the second hinge portion 16 by a screw so as to be detachable.

When the first arm 6 tries to rotate about the hinge shaft 30 in the right rotation direction in which the first arm 6 swings in the falling direction due to its own weight in FIG. The coil spring 24 to which the rotational force of the first arm 6 is transmitted and is connected to the first hinge portion 20 via the ring-shaped portion 24c is coupled with the clutch sleeve by the rotational force in the direction of falling weight from the first arm 6 side. The outer peripheral surface 22 a of the belt 22 is wound and fastened (locked) to the clutch sleeve 22. As a result, the first hinge part 20 is locked (fixed) to the second hinge part 16 by the coil spring 24.

When external stress is applied to the first arm 6 in the left rotation direction around the hinge shaft 30 of the first bent portion 4 in FIG. 2, the first arm 6 in FIG. The coil spring 24 is pressed in the direction in which the ring-shaped portion 24c at the other end loosens the tightening force of the coil spring 24 by the rotational force in the counterclockwise rotation direction, and the coil spring 24 has an adhesion force to the clutch sleeve 22. The first hinge portion 20 is loosened and the lock of the second hinge portion 16 with respect to the second hinge portion 16 is released, and the first bent portion about the hinge shaft 30 of the first bent portion 4 in FIG. 4 is configured to be able to freely swing counterclockwise until it is locked by a one-way stopper mechanism (not shown) provided in FIG.

FIG. 1 is a cross-sectional view of the second bent portion 8, and the second bent portion 8 is similar to the first bent portion 4 in that the first hinge portion 42, the second hinge portion 44, and the clutch sleeve 46. And a coil spring 48 and a cover 50, which constitute a one-way clutch. A projecting portion 42 b is integrally formed in the disk portion 42 a of the first hinge portion 42 in the radial direction, and one end of the second arm 10 is fixed to the projecting portion 42 b with a screw 50. One end of the disk shaft 42 a is fixed by a nut 56 so that a hinge shaft 54 made of a bolt is orthogonal to the longitudinal direction of the second arm 10.

The second hinge portion 44 includes a tubular portion 44a and a plate-like portion 44b extending at a right angle to the central axis of the tubular portion 44a at one end of the tubular portion 44a. Through the bush 58 fitted and fixed to the hinge shaft 54, the hinge shaft body 54 is rotatably fitted so as not to move in the axial direction. A cylindrical clutch sleeve 46 is fitted and fixed to the outer peripheral surface of the tubular portion 44 a of the second hinge portion 44. One end side of the sleeve 46 is rotatably fitted to an inner peripheral surface 42c of an annular recess formed on the inner surface of the disk portion 42a of the first hinge portion 42.

The first hinge part 42 and the second hinge part 44 are connected to the second arm 10 and a hinge shaft 54 set in a direction perpendicular to the first arm 6 so as to be relatively rotatable. Yes. The upper part of the first arm 6 is fixed to one side of the plate-like part 44b of the second hinge part 44 with a screw. An inner diameter portion of a coil spring 48 is closely fitted to the outer peripheral surface 46a of the clutch sleeve 46. A wire fixture 60 is fixed to an extended portion of the one end portion 48a of the coil spring 48 that extends linearly for a predetermined length in the radial direction of the coil spring 48.

A ring-shaped portion 48 c is formed on an extension portion of the other end portion 48 b of the coil spring 48 that extends linearly for a predetermined length in the radial direction. A bolt 62 that is screwed into a screw hole formed in an eccentric portion of the inner surface of the disk portion 42 a of the first hinge portion 42 is inserted into the ring-shaped portion 48 c, and the ring-shaped portion 48 c is tightened by the tightening force of the bolt 62. 48 c is fixed to the wall surface of the eccentric part of the disk part 42 a of the first hinge part 42 by pressure bonding. The cover 50 is formed of a bottomed cylindrical body, and the bottom portion 50a is fixed to the second hinge portion 44 by a screw so as to be detachable.

A string-shaped member guide 64 having a ring-shaped portion for wire guide is attached to the inner wall surface of the bottom 50 a of the cover 50, and the wire-guide ring-shaped portion of the string-shaped member guide 64 is connected to the hinge shaft 54. It is arranged on the central axis L. The center axis L of the hinge shaft 54 constitutes the bending rotation center axis L of the second bent portion 8. When the second arm 10 tries to rotate around the hinge shaft 54 of the second bent portion 8 in the clockwise rotation direction in which the second arm 10 swings in the falling direction due to its own weight in FIG. The rotational force of the second arm 10 is transmitted to the 1 hinge portion 42.

As a result, the coil spring 48 connected to the first hinge portion 42 via the ring-shaped portion 48c is wound around the clutch sleeve 46 by the rotational force in the direction of falling weight from the second arm 10 side, and the first hinge portion 42 is locked (fixed) to the second hinge portion 44 by a coil spring 48. When an external stress is applied to the second arm 10 in the counterclockwise direction around the hinge shaft 54 in FIG. 2, the coil spring is caused by the counterclockwise rotational force from the second arm 10 side. 48 is loosened in contact with the clutch sleeve 46.

As a result, the lock of the first hinge part 42 with respect to the second hinge part 44 is released, and the second bent part 8 is centered on the hinge shaft 54 of the second bent part 8 in FIG. The first arm 6 can be freely swung in the counterclockwise direction until it is locked by a one-way stopper mechanism (not shown) provided on the first arm 6. 5 and 6 are sectional views of the clutch remote control member 12. The clutch remote control member 12 includes a housing 66, a pulley support shaft body 68, a pulley 70, a return spring 72, and an operation lever 74 as main components.

One end of an operating lever 74 arranged at a right angle to the end of the pulley support shaft body 68 is fixed by a screw 81. A return spring 72 formed of a torsion spring is loosely fitted on the pulley support shaft body 68. One end extension of the spring 72 is screwed to the side wall of the housing 66, and the other end extension is an operation lever 74. Are fixed to the eccentric part of the first and second parts by screws 75. One of the housings 66 is integrally screwed to the upper part of the second arm 10. A pulley 70 is disposed between both side walls of the housing 66, and a pulley support shaft 68 is integrally fixed to the center of the pulley 70 with a screw 79. The vicinity of both ends of the pulley support shaft body 68 is rotatably supported on both side walls of the housing 66 via bushes 77 and 77.

An arcuate guide hole 76 for restricting the swing range of the operation lever 74 is formed in the side wall of the housing 66, and a pin 78 projecting from an eccentric portion of the pulley 70 is slidably fitted and disposed therein. ing. Two string-like members 80 and 82 made of flexible wire are wound around the pulley 70, and one end of each string-like member 80 and 82 is locked to the surface of the pulley 70 by a screw 83. The two string-like members 80 and 82 wound around the pulley 70 are guided into the second bent portion 8 through the inside of the second arm 10. Here, the two string-like members 80 and 82 are guided. The other end of one of the string members 80 is fixed to the wire fitting 60 of the second bent portion 8 as shown in FIG.

As shown in FIGS. 1 and 4, the other single string-like member 82 is inserted into the ring-shaped wire guide portion of the string-like member guide 64 and the hole 84 of the plate-like portion 44 b of the second hinge portion 44. Further, after being guided to the inside of the first arm 6, the other end is fixed to the wire fitting 36 of the first bent portion 4 as shown in FIG. In a state where the operation lever 74 is returned to the original position having a predetermined angle with respect to the second arm 10, the string member 80 between the pulley 70 and the second bent portion 8 and the pulley 70 and the first bent portion. Appropriate slack is set in the string-like members 82 between the four members so as not to impair the transmission function, and due to this slack, appropriate play (non-operational range) is formed in the wire pulling operation of the operation lever 74. A shaft-like tip mounting portion 14 is fixed to the tip of the housing 66, and a holder (not shown) for holding a respiratory tube (not shown) used for medical treatment is attached to the tip mounting portion 14. It is supposed to be. As the holding tool held by the tip mounting portion 14, various kinds of devices such as a lighting device for a desk lamp, a display device for a personal computer, and the like other than the medical respiratory tube are conceivable, and any device may be used.

Next, the operation of this embodiment will be described.
In a state where the operation lever 74 is returned to the original position by the elastic force of the return spring 72, each one clutch of the first bent portion 4 and the second bent portion 8 is connected to the hinge shaft body 30 of the coil springs 24 and 48. , 54, the swinging of the first arm 6 in the dropping direction due to its own weight about the hinge shaft 30 of the first bent portion 4 is locked, and the second arm 10 The swing in the dropping direction due to its own weight about the hinge shaft body 54 of the bent portion 8 is locked. In the state where the lever 74 is returned to the original position, the pulling force of the string-like members 80 and 82 is not applied to the one end portions 24a and 48a of the coil springs 24 and 48, respectively. When the position of the tip fitting 14 is adjusted, the locked state is released. To release the locked state, the operating lever 74 is grasped by hand, and the lever 74 is swung with respect to the housing 66 in a predetermined unlocking direction away from the original position against the elasticity of the return spring 72, and the lever 74 is moved. Approach the second arm 10 side.

The swing of the lever 74 causes the pulley 70 to rotate in a direction in which the string-like members 80 and 82 are wound, and the string-like members 80 and 82 are wound around the surface of the pulley 70 by a predetermined length. When the string-like members 80 and 82 are wound around the pulley 70, the string-like members 80 and 82 move, and the one end portions 24a and 48a of the coil springs 24 and 48 of the first bent portion 4 and the second bent portion 8 are moved. The coil springs 24 and 48 are pulled in the tangential direction of the diameter. Due to the tensile force of the string-like members 80 and 82, the tightening force of the coil springs 24 and 48 with respect to the clutch sleeves 22 and 46 is loosened, and the lock of each clutch of the first bent portion 4 and the second bent portion 8 is released. Is done.

By releasing the one-clutch lock, the second arm 10 can rotate about the hinge shaft 54 of the second bent portion 8, and the first arm 6 also has the hinge shaft of the first bent portion 4. The operator can move the tip mounting portion 14 to an arbitrary position in the vertical direction with one hand while holding the operation lever 74. Further, if the tip mounting portion 14 is pressurized in the left-right direction, the base arm 18 rotates relative to the support, and the tip mounting portion 14 can be moved in the left-right direction.

The opposing angle α between the first arm 6 and the second arm 10 is narrowed or widened, and the shortest distance connecting the string member feeding point of the pulley 70 and the wire fitting 36 of the first bent portion 4 is Even if it changes, since the string-like member guide 64 is disposed on the central axis L of the hinge shaft 54 of the second bent portion 8, the pulley 70 and the wire passing through the string-like member guide 64. The length of the shortest path for effectively transmitting the tensile force of the string-like member 82 between the fixture 36 does not change. Therefore, regardless of the change in the bending angle α between the arms 6 and 10, the movement amount of the string-like member 82 in the winding direction of the pulley 70 has an error of a predetermined play amount (sag), and the wire is attached. It is accurately transmitted to the part 36. When the hand is released from the operation lever 74 and the pressing force is released, the operation lever 74 opens to the second arm 10 to a predetermined angle by the elastic force of the return spring 72 and returns to the original position. By the return of the operation lever 74 to the original position, the pulley 70 rotates in the reverse direction, and the string-like members 80 and 82 are drawn out from the pulley 70 by a predetermined amount in the slack direction, and the tensile force on the wire attachment portions 36 and 60 is released. The

Thereby, each one clutch of the 1st bending part 4 and the 2nd bending part 8 is locked automatically, and the front-end | tip attachment part 14 is fixed to an adjustment position. In the present embodiment, the one-clutch installed in the first bent portion 4 and the second bent portion 8 has a configuration in which the inner diameter portions of the coil springs 24 and 48 are wound around the outer peripheral surfaces of the sleeves 22 and 46 when locked. However, the present invention is not particularly limited to this configuration, and may be configured such that when locked, the diameter of the coil spring is increased and the coil spring is pressed against the inner peripheral surface of the clutch sleeve. Moreover, it is good also as a structure by which a lock | rock is cancelled | released with the diameter reduction of a coil spring.

In addition, it is desirable that the string-like member guide 64 is accurately arranged on the central axis L of the hinge shaft 54 of the second bent portion 8, but this is not an essential requirement, and the string-like member guide tool 64 at the time of unlocking is not necessary. Considering the amount of movement of the member 82 in the winding direction of the pulley 70 and the like, it may be in the vicinity of the bending rotation center axis L within a range in which the lock is reliably released. Further, in this embodiment, the string-like member guide tool 64 is attached to the cover 50 fixed to the second hinge portion 44 side, but if it is on or near the bending rotation center axis L, the second bent portion 8 may be attached to any of the first hinge part 42, the second hinge part 44, and other members constituting the second bent part 8. In the present invention, the second bent portion 8 is not particularly limited to the one-way clutch mechanism.

2 Base 4 First bent portion 5 Arm 6 First arm 8 Second bent portion 10 Second arm 12 Clutch remote control member 14 Tip attachment portion 16 Second hinge portion 16a Tubular portion 16b Plate-like portion 16c Wall surface 18 Base arm 20 First 1 hinge part 20a disk part 20b protrusion part 20c inner peripheral surface 22 clutch sleeve 22a peripheral surface 24 coil spring 26 cover 28 screw 30 shaft 30 for hinge 32 nut 34 bush 36 wire fitting 38 screw hole 40 bolt 42 first hinge part 42a Disc part 42b Protrusion part 42c Inner peripheral surface 44 Second hinge part 44a Tubular part 44b Plate-like part 46 Clutch sleeve 46a Peripheral surface 48 Coil spring 50 Cover 52 Screw 54 Hinge shaft 56 Nut 58 Bushing 60 Wire fitting 62 Bolt 64 String member guide tool 66 Housing 68 Shaft body 70 Pooh 72 Return spring 74 Operation lever 76 Guide hole
78 pin 80 string member 82 string member 83 hole

Claims (3)

A pair of hinge portions (20), (16) that are rotatable relative to each other, and a peripheral surface (22a) provided on one hinge portion (16) side of the pair of hinge portions (20), (16); A coil spring (24) fitted and disposed on the peripheral surface (22a), and one end (24b) of the coil spring (24) is located in the pair of hinge portions (20) and (16). The one hinge part (16) of the pair of hinge parts (20) and (16) is fixed to the other hinge part (20) side by the rotational force in one direction with respect to the other hinge part (20). When the radial surface of the coil spring (24) is in close contact with the peripheral surface (22a) and is fixed to the peripheral surface (22a), and a tensile force acts on the other end (24a) of the coil spring (24), The peripheral surface (22 of the radial surface of the coil spring (24)) ) And the one end of the coil spring (24) of the one-way clutch, and the other end of the coil spring (24) of the one-way clutch. A string-like member (82) connected to (24a) and an operation member (12) connected to the other end of the string-like member (82) to operate the string-like member (82) in a pulling direction. And an arm having one side connected to the operating member (12), a bent portion (8) capable of changing the bending angle at the middle portion, and another bent portion (4) capable of changing the bending angle at the other side ( 5), the other bent portion (4) is constituted by the one-way clutch, and is located on or near the bent rotation center axis (L) of the bent portion (8) of the intermediate portion, A string-like member (82) connected to the operating member (12) at the bent portion (8) A coil spring type one-way clutch device which is characterized in that a string member guide tool (64) having a guide portion for movably supporting. The operation member (12) includes a pulley (70) rotatably supported at the tip of the arm (5), and a lever (74) connected to the pulley (70), and the pulley (70) The other end of the string-like member (82) is locked to the one end of the string-like member (82) by passing the string-like member (82) through the guide portion of the string-like member guide (64). The coil spring type one-way clutch device according to claim 1, characterized in that the coil is guided to the one-way clutch of the other bent portion (4) of the arm (5). A bent portion (8) at an intermediate portion of the arm (5) is configured by a one-way clutch, and the one-way clutch is configured to have a pair of hinge portions (42) and (44) that are rotatable relative to each other, and the pair of hinge portions. (42) It has a peripheral surface (46a) provided on one hinge part (44) side in (44), and a coil spring (48) fitted and arranged on the peripheral surface (46a), One end portion (48a) of the coil spring (48) is fixed to the other hinge portion (42) side of the pair of hinge portions (42) (44), and the pair of hinge portions (42) ( 44), the radial surface of the coil spring (48) is brought into close contact with the peripheral surface (46a) by the rotational force in one direction with respect to the other hinge portion (44) of the one hinge portion (42). (46a) and other than the coil spring (48) When a tensile force acts on the end (48a) of the coil spring, the tight contact of the radial surface of the coil spring (48) with the peripheral surface (46a) is loosened so that the radial surface is free to rotate with respect to the peripheral surface (46a). The string-like member (80) is connected to the operation member (12), and the string-like member (80) is connected to the other side for unlocking the coil spring (48) of the bent portion (8) of the intermediate portion. The coil spring type one-way clutch device according to claim 1, wherein the one-way clutch device is connected to an end portion (48 a) of the coil spring.

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