Self-locking clutch and sluice gate opening / closing equipment having the same

Abstract

The present invention provides a self-locking clutch that can stably fix the output side at the appropriate timing, and a sluice gate opening and closing device having the same. [Solution] A self-locking clutch 10 is provided in which, by a rotational force applied to the input member 11 from the outside, the output member 12 rotates together with the input member 11 in a force transmission state, and by a rotational force applied to the output member 12 from the outside, the input member 11 and the output member 12 are locked in a fixed state. The clutch comprises first and second rotating bodies 14 and 15 that transmit the rotation of the input member 11 to the output member 12 in the force transmission state and are fixed by the rotational force from the output member 12 in the locked state, and the input side force applying part 20 and the output side force applying part, or one or both of them, are connected by elastic members 37 to 40 that apply a force in the direction that returns the input side force applying parts 20 and 21, which are shifted from a reference position relative to the output side force applying part, to the reference position.

Description

Technical Field

[0001] The present invention relates to a self-locking clutch and a sluice opening and closing device having the same.

Background Art

[0002] A sluice opening and closing device that raises a door body by the rotation of a motor to open a sluice is provided with a manual handle so that the door body can be raised even when the motor cannot operate. In the case of a sluice opening and closing device that winds up a wire with a drum to raise the door body, when the motor is operating, the manual handle is disengaged from the power transmission mechanism that transmits the rotational force of the motor to the drum.

[0003] On the other hand, when the drum is rotated by a rotational operation on the manual handle to raise the door body, the manual handle is connected to the power transmission mechanism so that the rotational force applied to the manual handle by a human operation is transmitted to the drum via the power transmission mechanism. Here, a self-locking clutch that transmits a rotational force from the manual handle side to the power transmission mechanism side and does not transmit a rotational force from the power transmission mechanism side to the manual handle side is provided between the power transmission mechanism and the means handle, and a specific example thereof is disclosed in Patent Document 1.

[0004] The self-locking clutch not only prevents the force from being transmitted to the manual handle when the manual handle is not rotated manually and a force is applied to the power transmission mechanism such that the door body tends to descend by its own weight, but also fixes the power transmission mechanism to keep the door body stationary (prevent it from descending). That is, the self-locking clutch can transmit the rotational force from the input side to the output side with the manual handle side as the input side and the power transmission mechanism side as the output side, and fix the output side when no rotational force is applied from the input side.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] However, it has been confirmed that conventional self-locking clutches sometimes fail to lock the output side at the time it should be locked. If the output side is not locked at the time it should be locked, for example, when the hand that was rotating the manual handle is released from the manual handle, the output side will not be locked, causing the gate to descend. Self-locking clutches can also be used in sluice gate opening and closing equipment other than wire-type (for example, pin rack type or gear rack type sluice gate opening and closing equipment), as well as in equipment and devices other than sluice gate opening and closing equipment. This invention has been made in view of the above circumstances, and aims to provide a self-locking clutch that can be stably fixed at the timing when the output side should be fixed, and a sluice gate opening and closing device having the same. [Means for solving the problem]

[0007] A self-locking clutch according to the first invention in line with the above objective is a self-locking clutch that, when a rotational force is applied to an input member from the outside, puts the output member into a force transmission state in which it rotates together with the input member around a common axis of rotation, and when a rotational force is applied to the output member from the outside, puts the input member and the output member into a locked state in which they are fixed, and comprises first and second rotating bodies, each at least a part of which is disposed within a frame, which in the force transmission state rotate together with the input member and transmit the rotation of the input member to the output member, and which in the locked state are pressed against and fixed to the frame by the rotational force from the output member and fix the output member, The input member has an input-side force-applying part P1 that contacts the first rotating body to apply rotational force in the force transmission state, and an input-side force-applying part P2 that contacts the second rotating body to apply rotational force. The output member is positioned between the first and second rotating bodies and has an output-side force-applying part that presses the first and second rotating bodies against the frame in the locked state. Either the input-side force-applying part P1 and the output-side force-applying part, and either the input-side force-applying part P2 or the output-side force-applying part, or both, are connected by an elastic member that applies a force in the direction that returns the input-side force-applying parts P1 and P2, whose positions relative to the output-side force-applying part are shifted from a reference position, back to the reference position.

[0008] A sluice gate opening and closing device according to the second invention in line with the above objective is a sluice gate opening and closing device in which rotational force applied to a manual handle is transmitted to a drive member via a self-locking clutch and a power transmission mechanism, the drive member rotates and raises the gate body, the self-locking clutch comprises an input member to which rotational force is applied from the manual handle, an output member that outputs rotational force to the power transmission mechanism, and first and second rotating bodies, each at least a portion of which is disposed within a frame, the rotational force applied to the input member from the manual handle causes the output member to rotate together with the input member around a common axis of rotation in a force transmission state, the rotational force applied to the output member from the power transmission mechanism causes the input member and the output member to lock in a fixed state, and the first and second rotating bodies rotate together with the input member in the force transmission state The input member transmits the rotation of the input member to the output member, and in the locked state, is pressed against the frame by the rotational force from the output member and fixed, thereby fixing the output member. The input member has an input-side force-applying part P1 that contacts the first rotating body and applies rotational force, and an input-side force-applying part P2 that contacts the second rotating body and applies rotational force. The output member is positioned between the first and second rotating bodies and has an output-side force-applying part that presses the first and second rotating bodies against the frame in the locked state. Either the input-side force-applying part P1 and the output-side force-applying part, and either or both of the input-side force-applying part P2 and the output-side force-applying part are connected by an elastic member that applies a force in the direction of returning the input-side force-applying parts P1 and P2, whose position relative to the output-side force-applying part is shifted from a reference position, to the reference position. [Effects of the Invention]

[0009] The self-locking clutch according to the first invention comprises first and second rotating bodies, each at least part of which is disposed within a frame, which rotate together with an input member in a force transmission state to transmit the rotation of the input member to an output member, and which are pressed against the frame and fixed in a locked state by the rotational force from the output member to fix the output member. The input member has an input-side force-applying part P1 that contacts the first rotating body and applies rotational force in a force transmission state, and an input-side force-applying part P2 that contacts the second rotating body and applies rotational force. The output member is disposed between the first and second rotating bodies and has an output-side force-applying part that presses the first and second rotating bodies against the frame in a locked state. Either the input-side force-applying part P1 and the output-side force-applying part, and either or both of the input-side force-applying part P2 and the output-side force-applying part are connected by an elastic member that applies a force in the direction of returning the input-side force-applying parts P1 and P2, whose positions relative to the output-side force-applying part are shifted from a reference position, to a reference position. Therefore, the output member (output side) can be stably fixed at the timing when it should be fixed.

[0010] The sluice gate opening and closing device according to the second invention has a self-locking clutch according to the first invention, so that the output side of the self-locking clutch can be stably fixed at the timing when it should be fixed. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view of a self-locking clutch according to a first embodiment of the present invention. [Figure 2] This is a side cross-sectional view of the self-locking clutch. [Figure 3] This is an explanatory diagram of the input and output components. [Figure 4] This is an explanatory diagram showing the power transmission state of a self-locking clutch. [Figure 5] This is an explanatory diagram showing the locked state of a self-locking clutch. [Figure 6] (A) and (B) are explanatory diagrams of a self-locking clutch according to a second embodiment of the present invention, respectively. [Figure 7] This is an explanatory diagram of a sluice gate opening and closing device according to a third embodiment of the present invention. [Modes for carrying out the invention]

[0012] Next, with reference to the attached drawings, embodiments of the present invention will be described to facilitate understanding of the invention. As shown in Figures 1 and 2, in the first embodiment of the present invention, the self-locking clutch 10 is in a force transmission state in which the output member 12 rotates together with the input member 11 around a common rotation axis R due to a rotational force applied to the input member 11 from the outside, and in a locked state in which the input member 11 and the output member 12 are fixed due to a rotational force applied to the output member 12 from the outside. A detailed explanation follows below.

[0013] As shown in Figures 1 and 2, the self-locking clutch 10 comprises an input member 11, an output member 12, a frame 13 fixed by a support member (not shown), and a first rotating body 14 and a second rotating body 15, respectively, arranged within the frame 13. The frame 13 is annular, and the first rotating body 14 and the second rotating body 15 are each semi-disc-shaped and are arranged inside the frame 13 without overlapping each other.

[0014] In this embodiment, the first rotating body 14 and the second rotating body 15 are the same in size and shape, and are entirely housed within the frame 13, but the embodiment is not limited to these. For example, the first rotating body 14 and the second rotating body 15 may differ in size and shape, and it is sufficient that at least a portion of each is housed within the frame 13.

[0015] As shown in Figure 1, the first rotating body 14 and the second rotating body 15 are arranged so that together they form a disc-shaped object that is slightly smaller than the inner circumference of the frame 13. Therefore, the first rotating body 14 and the second rotating body 15 can move within a certain range relative to the frame 13. The first rotating body 14 includes a film-like lining 16 made of a friction material in an arc-shaped outer peripheral region facing the frame body 13, and the second rotating body 15 also includes a film-like lining 17 made of a friction material in an arc-shaped outer peripheral region facing the frame body 13.

[0016] As shown in FIG. 2, a shaft member 18 that rotates integrally with an external member (not shown) is connected to the input member 11. As shown in FIGS. 2 and 3, the input member 11 has a rectangular plate-shaped base portion 19 to which the shaft member 18 is connected at the center, and input-side force applying portions 20 and 21 (input-side force applying portions P1 and P2) respectively fixed to both longitudinal sides of the base portion 19. As shown in FIG. 2, the base portion 19 is arranged perpendicular to the shaft member 18. Needless to say, the base portion 19 does not necessarily need to be rectangular plate-shaped.

[0017] The input-side force applying portions 20 and 21 are arranged at intervals from each other, and each protrudes to the opposite side of the side where the shaft member 18 is connected with respect to the base portion 19. As shown in FIGS. 1 and 2, a through hole 22 through which the input-side force applying portion 20 is inserted is formed substantially at the center of the first rotating body 14, and a through hole 23 through which the input-side force applying portion 21 is inserted is formed substantially at the center of the second rotating body 15. The through hole 22 is larger than the input-side force applying portion 20, and the through hole 23 is larger than the input-side force applying portion 21. Therefore, the input-side force applying portions 20 and 21 can move within the through holes 22 and 23 respectively.

[0018] As shown in FIG. 2, the shaft member 18 is rotatably supported by a bearing 24. In the present embodiment, the rotation axis R is along the axis of the shaft member 18, and the input member 11 and the shaft member 18 can rotate about the rotation axis R. The rotation axis R is not a real member but a conceptual axis for expressing the rotational motion.

[0019] As shown in FIGS. 2 and 3, the output member 12 has a gear 26 rotatably attached to a bearing 24 and rod-shaped pressing pieces 27 and 28 (pressing pieces Q1 and Q2) fixed to the gear 26. The gear 26 is arranged parallel to the base portion 19 (perpendicular to the shaft member 18), and the pressing pieces 27 and 28 are arranged parallel to the input-side force applying portions 20 and 21. A gear 30 to which a rotational force is applied from the outside via a shaft member 29 meshes with the gear 26. The output member 12 rotates together with the gear 30 and the shaft member 29.

[0020] As shown in FIG. 1, in the linear region on the side of the second rotating body 15 in the first rotating body 14, cutouts 31 and 32 are formed at both end portions, respectively. In the linear region on the side of the first rotating body 14 in the second rotating body 15, cutouts 33 and 34 are formed at both end portions, respectively. The cutout 33 is arranged to face the cutout 31, and the cutout 34 is arranged to face the cutout 32.

[0021] The pressing piece 27 is arranged to pass through the space between the cutout 31 and the cutout 33, and the pressing piece 28 is arranged to pass through the space between the cutout 32 and the cutout 34. Therefore, the pressing pieces 27 and 28 are located between the first rotating body 14 and the second rotating body 15. Also, the output member 12 and the first and second rotating bodies 14 and 15 are also rotatable about the rotation axis R. Therefore, the input member 11 and the output member 12 may rotate integrally, or either one may be stationary and the other may rotate.

[0022] As shown in Figure 3, the input force application units 20, 21 and the pressing pieces 27, 28 are arranged around the rotation axis R so as to surround the rotation axis R. In this embodiment, the state in which the input force application units 20, pressing piece 27, input force application unit 21 and pressing piece 28 are arranged sequentially at 90-degree intervals around the rotation axis R is defined as the state in which the input force application units 20, 21 are positioned relative to the pressing pieces 27, 28 (output force application units). In other words, with the input force application units 20, 21 positioned relative to the pressing pieces 27, 28 (output force application units), the input force application units 20, pressing piece 27, input force application unit 21 and pressing piece 28 are arranged sequentially at 90-degree intervals around the rotation axis R.

[0023] Here, the input-side force-applying part 20 and the pressing piece 27, the input-side force-applying part 20 and the pressing piece 28, the input-side force-applying part 21 and the pressing piece 27, and the input-side force-applying part 21 and the pressing piece 28 are connected by spring members 37 to 40, which are an example of elastic members. The spring members 37 to 40 apply a force to the input-side force-applying parts 20 and 21 and the pressing pieces 27 and 28 that returns the input-side force-applying parts 20 and 21, whose relative positions with respect to the pressing pieces 27 and 28 (i.e., the output-side force-applying parts) are shifted from their reference positions back to their reference positions.

[0024] The self-locking clutch 10 is in a power transmission state where the rotation of the input member 11 is transmitted to the output member 12 by the rotation of the input member 11 due to the rotational force applied from the outside via the shaft member 18. Here, even if a rotational force is applied to the output member 12 from the outside via the shaft member 29 and gear 30, the power transmission state is maintained as long as that rotational force is smaller than the rotational force applied to the input member 11 from the outside via the shaft member 18.

[0025] On the other hand, the self-locking clutch 10 enters a locked state where the input member 11 and the output member 12 are fixed together when the rotational force applied to the shaft member 29 from the outside is transmitted to the output member 12 via the gear 30. Even if rotational force is applied to the input member 11 from the outside via the shaft member 18, the clutch will remain locked if that rotational force is smaller than the rotational force applied to the output member 12 from the outside via the shaft member 29 and the gear 30. The following describes the power transmission state and the lock state.

[0026] <Power transmission state> As the shaft member 18 rotates due to an external rotational force, the input member 11 also rotates, and as shown in Figure 4, the input-side force application unit 20 contacts the first rotating body 14, and the input-side force application unit 21 contacts the second rotating body 15. Here, the output member 12 is assumed to be stationary. From this state, the input member 11 rotates further together with the shaft member 18, causing the input-side force application unit 20 to apply rotational force to the first rotating body 14 and the input-side force application unit 21 to apply rotational force to the second rotating body 15.

[0027] The first and second rotating bodies 14 and 15, which are subjected to rotational force, approach each other and come into contact, and then rotate together with the input member 11 and the shaft member 18 around the rotation axis R while remaining in contact. With the first and second rotating bodies 14 and 15 in contact with each other, the linings 16 and 17 do not come into contact with the frame 13. Therefore, the first and second rotating bodies 14 and 15 rotate without frictional force being generated between them and the frame 13.

[0028] As the first and second rotating bodies 14 and 15 rotate, the first rotating body 14 contacts the pressing piece 28 and imparts a rotational force, and the second rotating body 15 contacts the pressing piece 27 and imparts a rotational force. The output member 12 rotates around the rotation axis R as rotational forces are applied to the pressing pieces 28 and 27 from the first and second rotating bodies 14 and 15, respectively. As a result, the output member 12 rotates together with the shaft member 18, the input member 11, and the first and second rotating bodies 14 and 15. Therefore, the first and second rotating bodies 14 and 15 rotate together with the input member 11 in the force transmission state, and transmit the rotation of the input member 11 to the output member 12.

[0029] With the input member 11, the first and second rotating bodies 14 and 15, and the output member 12 rotating together as a single unit, the input-side force-applying units 20 and 21 are rotated by a predetermined angle from their reference position relative to the pressing pieces 27 and 28. In other words, the relative positions of the input-side force-applying units 20 and 21 with respect to the pressing pieces 27 and 28 are shifted from their reference positions.

[0030] At this time, the spring members 37-40 apply a force to the input force-applying parts 20, 21 and the pressing pieces 27, 28 in a direction that returns the input force-applying parts 20, 21 to their reference position. Therefore, when the application of rotational force to the input member 11 via the shaft member 18 from the outside stops, the force applied by the spring members 37-40 to the input force-applying parts 20, 21 and the pressing pieces 27, 28 returns the input force-applying parts 20, 21 to their reference position, and the first and second rotating bodies 14, 15, which were in contact, can easily return to a non-contact state.

[0031] <Locked state> As the shaft 29 and gear 30 rotate due to the rotational force applied to the shaft 29 from the outside, the output member 12 rotates, and as shown in Figure 5, the pressing piece 27 contacts the first rotating body 14 and the pressing piece 28 contacts the second rotating body 15, thereby applying rotational force. Here, the input member 11 is assumed to be stationary.

[0032] Then, due to further rotation of the output member 12, the first and second rotating bodies 14 and 15 move away from each other due to the rotational force they receive from the pressing pieces 27 and 28, causing the linings 16 and 17 to contact the inner circumference of the frame 13, and a frictional force to be generated between the linings 16 and 17 and the frame 13.

[0033] The first and second rotating bodies 14 and 15 are fixed in place by the frictional force generated between the linings 16 and 17 and the frame 13. With the first and second rotating bodies 14 and 15 fixed, the stationary input member 11 remains stationary without rotating, and the rotating output member 12, gear 30, and shaft member 29 are fixed in place.

[0034] Therefore, in the locked state, the pressing pieces 27 and 28 (i.e., the output side force application parts) press the first and second rotating bodies 14 and 15 against the frame 13, and the first and second rotating bodies 14 and 15 are pressed against the frame 13 and fixed by the rotational force from the pressing pieces 27 and 28 (i.e., the output member 12), thereby fixing the output member 12.

[0035] With the pressing pieces 27 and 28 pressing the first and second rotating bodies 14 and 15 against the frame 13, the relative positions of the input force-applying parts 20 and 21 and the pressing pieces 27 and 28 are rotated (shifted) by a predetermined angle from the reference position. Therefore, the spring members 37 to 40 apply a force to the input force-applying parts 20 and 21 and the pressing pieces 27 and 28 in a direction that returns the input force-applying parts 20 and 21 to the reference position. As a result, when rotational force is no longer applied to the shaft member 29 from the outside, the force applied by the spring members 37 to 40 to the input force-applying parts 20 and 21 and the pressing pieces 27 and 28 returns the relative positions of the input force-applying parts 20 and 21 with respect to the pressing pieces 27 and 28 to the reference position.

[0036] In this way, by providing the spring members 37 to 40, when the state in which an external rotational force is applied to the input member 11 (force transmission state) is released, or when the state in which an external rotational force is applied to the output member 12 (lock state) is released, the positions of the input side force application parts 20 and 21 with respect to the pressing pieces 27 and 28 are stably returned to the reference position. In this embodiment, as shown in Figures 1 and 2, the first rotating body 14 and the second rotating body 15 are connected by spring members 41 and 42.

[0037] The output member 12 of the self-locking clutch 10 described above has two pressing pieces 27 and 28 in the output side force application section that presses the first and second rotating bodies 14 and 15 against the frame 13, but is not limited to this. Referring to Figures 6(A) and (B), a self-locking clutch 50 according to a second embodiment of the present invention, in which the output side force application section has one pressing piece 51, will be described. In the self-locking clutch 50, the same reference numerals are used for structures similar to those in the self-locking clutch 10, and detailed explanations are omitted.

[0038] As shown in Figures 6(A) and (B), the self-locking clutch 50 has a pressing piece 51 positioned between input-side force-applying parts 20 and 21, and the input-side force-applying part 20 and one side of the pressing piece 51, the input-side force-applying part 20 and the other side of the pressing piece 51, the input-side force-applying part 21 and one side of the pressing piece 51, and the input-side force-applying part 21 and the other side of the pressing piece 51 are connected by spring members 37 to 40, respectively.

[0039] The pressing piece 51 is positioned between the first and second rotating bodies 52 and 53, and a shaft member 55 to which rotational force is applied from the outside is connected to the output member 54 equipped with the pressing piece 51. When rotational force is transmitted from the outside to the output member 54 via the shaft member 55, the pressing piece 51 rotates and presses the lining 56 of the first rotating body 52 and the lining 57 of the second rotating body 53 against the frame 13. As a result, the self-locking clutch 50 locks the first and second rotating bodies 52 and 53 and the output member 54 in place, and the input member 11 is locked in place.

[0040] Then, when rotational force is no longer applied to the output member 54 via the shaft member 55 from the outside, the force applied by the spring members 37-40 to the input side force applying parts 20, 21 and the pressing piece 51 returns the relative positions of the input side force applying parts 20, 21 with respect to the pressing piece 51 to their reference positions. On the other hand, when rotational force is applied to the input member 11 from the outside via the shaft member 18, the input side force application parts 20 and 21 rotate, causing the first and second rotating bodies 52 and 53 to come into contact with each other. Subsequently, the first and second rotating bodies 52 and 53 rotate together with the input member 11, causing the output member 54 to rotate.

[0041] Furthermore, the self-locking clutches 10 and 50 can be used in sluice gate opening and closing equipment for opening and closing sluice gates. Hereinafter, with reference to Figure 7, a sluice gate opening and closing device 70 according to a third embodiment of the present invention having a self-locking clutch 10 will be described. As shown in Figure 7, the sluice gate opening and closing device 70 is equipped with a manual handle 71 and a motor 72. The rotational force applied to the manual handle 71 by a person's rotational operation or the rotational force of the motor 72 is transmitted to the drive member 74 via a power transmission mechanism 73, causing the drive member 74 to rotate, raising the gate body and opening the sluice gate.

[0042] In this embodiment, the drive member 74 is a drum around which a wire 75 connected to the door body is wound, but it is not limited to this. The manual handle 71 is connected to the input member 11 of the self-locking clutch 10 via the shaft member 18, and the output member 12 of the self-locking clutch 10 is connected to the power transmission mechanism 73 via the gear 30, shaft member 29, and clutch 76.

[0043] The power transmission mechanism 73 is composed of multiple components, such as gears and shafts. When the drive member 74 is rotated by the rotation of the motor 72, the shaft 29 is disconnected from the power transmission mechanism 73 by the clutch 76. In contrast, when the drive member 74 is rotated by the rotational force applied to the manual handle 71, the shaft 29 is connected to the power transmission mechanism 73 by the clutch 76 (that is, the rotational force applied to the manual handle 71 is transmitted from the shaft 29 to the power transmission mechanism 73).

[0044] Here, since the self-locking clutch 10 functions as described above, when rotational force is applied to the input member 11 via the shaft member 18 from the manual handle 71, the output member 12 rotates together with the input member 11, and this rotational force is transmitted to the drive member 74 via the gear 30, the shaft member 29 and the power transmission mechanism 73.

[0045] On the other hand, when rotational force is applied from the power transmission mechanism 73 to the output member 12 via the clutch 76, shaft member 29, and gear 30, the output member 12 is fixed, and this fixing of the output member 12 also fixes the power transmission mechanism 73 and the drive member 74. Therefore, it is possible to prevent the door body from descending under its own weight.

[0046] Although embodiments of the present invention have been described above, the present invention is not limited to the above-described forms, and any changes to the conditions, etc., that do not depart from the gist of the invention are all within the scope of application of the present invention. For example, self-locking clutches can be used in sluice gate opening and closing equipment other than wire-operated systems, as well as in equipment other than sluice gate opening and closing systems. Furthermore, if the output-side force application unit has pressing pieces Q1 and Q2, the input-side force application unit P1, pressing piece Q1, input-side force application unit P2, and pressing piece Q2 do not need to be arranged sequentially at 90-degree intervals around the rotation axis R.

[0047] The input force application unit P1 and the output force application unit, or the input force application unit P2 and the output force application unit, may be connected by an elastic member. For example, with respect to the self-locking clutch 10, the spring member 37 connecting the input force application unit 20 and the pressing piece 27, and the spring member 38 connecting the input force application unit 20 and the pressing piece 28 may be left, while the spring member 39 connecting the input force application unit 21 and the pressing piece 27, and the spring member 40 connecting the input force application unit 21 and the pressing piece 28 may be removed. Furthermore, the elastic member connecting either or both of the input-side force-applying unit P1 and the output-side force-applying unit, and the input-side force-applying unit P2 and the output-side force-applying unit, does not have to be a spring member; for example, the elastic member may be made of rubber. [Explanation of Symbols]

[0048] 10: Self-locking clutch, 11: Input member, 12: Output member, 13: Frame, 14: First rotating body, 15: Second rotating body, 16, 17: Lining, 18: Shaft member, 19: Base part, 20, 21: Input side force application part, 22, 23: Through hole, 24: Bearing, 26: Gear, 27, 28: Pressing piece, 29: Shaft member, 30: Gear, 31-34: Notch, 37-42: Spring member, 50: Self-locking clutch, 51: Pressing piece, 52: First rotating body, 53: Second rotating body, 54: Output member, 55: Shaft member, 56, 57: Lining, 70: Sluice gate opening / closing equipment, 71: Manual handle, 72: Motor, 73: Power transmission mechanism, 74: Drive member, 75: Wire, 76: Clutch, R: Rotating shaft

Claims

1. A self-locking clutch in which, by rotational force applied to an input member from the outside, the output member rotates together with the input member around a common axis of rotation in a force transmission state, and by rotational force applied to the output member from the outside, the input member and the output member are locked in a fixed state, Each of the first and second rotating bodies is provided, with at least a portion of each being positioned within the frame, and in the force transmission state, rotates together with the input member to transmit the rotation of the input member to the output member, and in the locked state, is pressed against and fixed to the frame by the rotational force from the output member, thereby fixing the output member. The input member has an input-side force-applying part P1 that contacts the first rotating body to apply rotational force in the force transmission state, and an input-side force-applying part P2 that contacts the second rotating body to apply rotational force. The output member is positioned between the first and second rotating bodies and, in the locked state, has an output-side force-applying part that presses the first and second rotating bodies against the frame. A self-locking clutch characterized in that the input-side force-applying unit P1 and the output-side force-applying unit, and the input-side force-applying unit P2 and the output-side force-applying unit, or either one or both, are connected by an elastic member that applies a force in the direction of returning the input-side force-applying units P1 and P2, which are offset from a reference position relative to the output-side force-applying unit, to the reference position.

2. The self-locking clutch according to claim 1, characterized in that the output side force application unit has pressing pieces Q1 and Q2 that apply force to the first and second rotating bodies, respectively, in the locked state, and the input side force application units P1 and P2 and the pressing pieces Q1 and Q2 are arranged around the rotating shaft so as to surround the rotating shaft.

3. The self-locking clutch according to claim 2, characterized in that, with the input-side force-applying units P1 and P2 positioned relative to the output-side force-applying unit, the input-side force-applying unit P1, the pressing piece Q1, the input-side force-applying unit P2, and the pressing piece Q2 are arranged sequentially at 90-degree intervals around the rotation axis.

4. A sluice gate opening and closing device in which the rotational force applied to a manual handle is transmitted to a drive member via a self-locking clutch and a power transmission mechanism, and the drive member rotates to raise the gate body, The self-locking clutch comprises an input member to which rotational force is applied from the manual handle, an output member to which rotational force is applied to the power transmission mechanism, and first and second rotating bodies, each at least partially disposed within a frame. The rotational force applied to the input member from the manual handle causes the output member to rotate together with the input member around a common axis of rotation in a power transmission state, and the rotational force applied to the output member from the power transmission mechanism causes the input member and the output member to lock in place. The first and second rotating bodies, in the force transmission state, rotate together with the input member and transmit the rotation of the input member to the output member, and in the locked state, are pressed against and fixed to the frame by the rotational force from the output member, thereby fixing the output member. The input member has an input-side force-applying part P1 that contacts the first rotating body to apply rotational force in the force transmission state, and an input-side force-applying part P2 that contacts the second rotating body to apply rotational force. The output member is positioned between the first and second rotating bodies and, in the locked state, has an output-side force-applying part that presses the first and second rotating bodies against the frame. A sluice gate opening and closing device characterized in that the input side force applying unit P1 and the output side force applying unit, and either or both of the input side force applying unit P2 and the output side force applying unit are connected by an elastic member that applies a force in the direction of returning the input side force applying units P1 and P2, which are offset from a reference position relative to the output side force applying unit, to the reference position.

5. The sluice gate opening and closing device according to claim 4, characterized in that the output side force application unit has pressing pieces Q1 and Q2 that apply force to the first and second rotating bodies, respectively, in the locked state, and the input side force application units P1 and P2 and the pressing pieces Q1 and Q2 are arranged around the rotating shaft so as to surround the rotating shaft.

6. The sluice gate opening and closing device according to claim 5, characterized in that, with the input-side force-applying units P1 and P2 positioned relative to the output-side force-applying unit, the input-side force-applying unit P1, the pressing piece Q1, the input-side force-applying unit P2, and the pressing piece Q2 are arranged sequentially at 90-degree intervals around the rotation axis.

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