WO2013105196A1 - 開閉装置および開閉装置操作機構 - Google Patents
開閉装置および開閉装置操作機構 Download PDFInfo
- Publication number
- WO2013105196A1 WO2013105196A1 PCT/JP2012/008328 JP2012008328W WO2013105196A1 WO 2013105196 A1 WO2013105196 A1 WO 2013105196A1 JP 2012008328 W JP2012008328 W JP 2012008328W WO 2013105196 A1 WO2013105196 A1 WO 2013105196A1
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- Prior art keywords
- shaft
- closing
- sprocket
- lever
- fixed
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
- H01H21/48—Driving mechanisms incorporating a ratchet mechanism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/34—Driving mechanisms, i.e. for transmitting driving force to the contacts using ratchet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/36—Driving mechanisms, i.e. for transmitting driving force to the contacts using belt, chain, or cord
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
- H01H3/58—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2227/00—Dimensions; Characteristics
- H01H2227/032—Operating force
- H01H2227/034—Regulation of operating force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
- H01H7/02—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means
- H01H7/03—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means with dash-pots
Definitions
- This embodiment relates to a switchgear and a switchgear operating mechanism.
- the feeding claw is rotated by the rotation of the motor to rotate the claw wheel
- the closing shaft is rotated by the claw wheel to rotate the closing spring through the closing lever.
- Patent Document 1 As a first conventional example of such an opening / closing device operating mechanism, a technique disclosed in Patent Document 1 is known.
- the reverse of the closing shaft immediately after the closing operation of the opening / closing device is stopped is stopped by the first pawl, the second pawl and the third pawl, and is also stopped and borne by the cam clutch. Dispersing and mitigating the collision force generated in the part is disclosed.
- Patent Document 2 As a second conventional example of the operating mechanism of the switchgear, the technique disclosed in Patent Document 2 is known.
- the technique of Patent Document 2 since a non-linear elastic body is used for the stopper portion for the first and second pawls, the stop lever that engages the first plate is centered on the closing shaft.
- the power transmission unit that drives the energy storage cam that swings and is rotatably arranged on the stop lever is not a structure that transmits the driving force of the motor even if the distance between the speed reducer and the energy storage cam changes. What must not be disclosed.
- Patent Document 3 As a third conventional example of the operating mechanism of the switchgear, the technique disclosed in Patent Document 3 is known.
- the power transmission mechanism is constituted by a chain and a sprocket.
- a power transmission mechanism using a chain is disclosed that transmits power even if the distance between the shafts between the sprockets arranged at both ends of the chain is somewhat expanded or contracted.
- the reverse rotation of the claw wheel during the closing operation may be stopped by the first claw.
- the first pawl, the cam roller, the accumulating cam, the stopper, the cam clutch, and the like since the impact force at the time of stop is received by the first pawl, the cam roller, the accumulating cam, the stopper, the cam clutch, and the like, it becomes a factor that causes damage to the parts that receive such impact force and a decrease in life.
- the reverse rotation of the claw wheel during the closing operation is stopped by the first pawl or the second pawl, and the impact force generated at that time is caused by the elastic deformation of the nonlinear elastic body of the stopper portion.
- the peak load of the nonlinear elastic body increases with displacement. Since the strength of the member that supports the stopper portion needs to be increased in accordance with the peak load, the operation mechanism tends to increase in size.
- the displacement deformation amount
- the displacement increases as the displacement increases, the swing angle of the stop lever increases and the displacement of the sprocket also increases, so that the slack of the chain increases. For this reason, there is a high possibility that the chain will fall off the sprocket, and there is a high possibility that the chain will vibrate greatly and come into contact with other parts and break.
- the problem to be solved by the present invention is to provide an opening / closing device and an opening / closing device operating mechanism that alleviates the impact force generated when the ratchet wheel reverses during the closing operation, prevents the strength of the support member from decreasing, and suppresses the chain from falling off. Is to provide.
- the switchgear operating mechanism of the embodiment is a switchgear operating mechanism that reciprocally drives the movable contact of the switchgear and causes the switchgear to move between a shut-off state and a closed state.
- the opening / closing device operating mechanism extends in the direction of the first rotation axis and extends in the first rotation axis direction, and is rotatably supported by the support structure, and is fixed to the input shaft and rotates together with the input shaft.
- a claw wheel having a substantially disc shape and having a plurality of outer peripheral teeth formed along the circumferential direction on the outer circumferential side surface thereof, and being arranged side by side in the axial direction on the claw wheel, and swinging around the input shaft in the circumferential direction.
- a feed lever having a feed lever roller which is movable and has a roller for a feed lever which is rotatable around a second rotation shaft in the vicinity of the outer periphery in the vicinity of the input shaft; and the feed lever in the direction of the first rotation shaft It is arranged side by side and is provided in a plate shape that can swing around the charging shaft in the circumferential direction, and is provided with an energy storage cam that can rotate around an energy storage cam shaft extending in parallel to the input shaft near the outer periphery.
- Stop levers configured to be able to contact each other in the circumferential direction, a drive unit fixed to the support structure and capable of transmitting power for swinging to the feed lever, and attached to the feed lever, A feed claw that is engageable with an outer peripheral tooth and that transmits power transmitted from the drive unit to the claw wheel to rotate the claw wheel and the input shaft in at least one direction, and is attached to the stop lever, A plurality of retaining pawls that engage with the claw wheel and prevent the claw wheel and the input shaft from rotating in the reverse direction with respect to the one direction, and are configured to expand and contract as the input shaft rotates.
- the switchgear includes a movable contact that can be reciprocated and an operation mechanism that drives the movable contact. It is a switchgear that can move between each other.
- the operation mechanism of the opening / closing device includes a support structure, a feed shaft extending in the first rotation axis direction and rotatably supported by the support structure, and being fixed to the feed shaft and rotating together with the feed shaft.
- a claw wheel having a plurality of outer peripheral teeth formed along a circumferential direction on the outer circumferential side surface thereof, and being arranged side by side in the axial direction on the claw wheel, and around the input shaft in the circumferential direction.
- a feed lever provided with a feed lever roller rotatable around a second rotary shaft in the vicinity of the outer periphery and extending in parallel with the input shaft, and the feed lever in the first rotary shaft direction Arranged in a row, in the shape of a plate that can swing around the charging shaft in the circumferential direction, and provided with an energy storage cam that can rotate around an energy storage cam shaft extending in parallel with the input shaft near the outer periphery,
- the energy storage cam and the feed lever roller Are fixed to the support structure and capable of transmitting power for swinging to the feed lever, and attached to the feed lever.
- a plurality of retaining pawls that engage with the claw wheel and prevent the claw wheel and the input shaft from rotating in the reverse direction with respect to the one direction, and are configured to expand and contract as the input shaft rotates.
- FIG. 3 is a partial view showing an input shaft, a fourth sprocket, and an intermediate shaft portion of FIGS. 1 and 2. Sectional drawing of the stopper part of the operation mechanism shown in FIG. Sectional drawing of the stopper part of the operation mechanism shown in FIG. The relationship between the displacement of a stopper part and load in 1st Embodiment.
- FIG. 8 is a partial view showing an input shaft, a fourth sprocket, and an intermediate shaft portion of FIG. 7. The relationship between the displacement of the stopper and the load according to the conventional example.
- FIG. 1 is an exploded front view showing a closing operation completion state of the switchgear operating mechanism according to the first embodiment of the present invention.
- FIG. 2 is an exploded front view illustrating a state where the energy storage operation of the switchgear operating mechanism according to the first embodiment is completed.
- FIG. 3 is a partial view showing the making shaft, the fourth sprocket, and the intermediate shaft portion of FIGS. 1 and 2.
- 4 is a sectional view of the stopper portion of the operating mechanism shown in FIG. 2
- FIG. 5 is a sectional view of the stopper portion of the operating mechanism shown in FIG.
- FIG. 6 shows the relationship between the displacement of the stopper portion and the load according to the first embodiment.
- FIG. 9 shows the relationship between the displacement of the stopper portion and the load according to the conventional example, and is a diagram specifically illustrated for comparison with FIG.
- the general components of the switchgear will be described.
- elements such as a cutoff spring part and a catch device part provided in a general switchgear are simplified or omitted.
- the closing shaft 3 shows only the center of the shaft, and details of the shape and the like are omitted.
- the opening / closing device operating mechanism of the present embodiment has a support structure 4, and the input shaft 3 extends in the axial direction and is rotatably supported by the support structure 4. .
- the hook shaft 22 that rotates together with the charging shaft 3 is fixed to the charging shaft 3.
- the claw wheel 22 is arranged in the axial direction of the closing shaft 3 with a gap from the closing lever 10.
- the ratchet wheel 22 has a disk shape, and a plurality of outer peripheral teeth 22a are formed on the outer peripheral side surface.
- the closing lever 10 is fixed to the closing shaft 3.
- the closing lever 10 reaches the position shown in FIG. 2 (dead point), that is, the distance between the support structure 4 and the spring receiver 6 or the pin 8 is maximized, the energy storage operation of the closing spring 1 is completed. .
- the closing lever 10 rotates in the direction opposite to the arrow A by the stored spring force (restoring force) of the closing spring 1.
- the ratchet wheel 22 also rotates in the direction opposite to the arrow A.
- the reverse rotation of the ratchet wheel 22 is stopped by engaging at least one of the first pawl 24a and the second pawl 24b with the outer peripheral teeth 22a.
- the feeding claw 23 and the outer peripheral teeth 22a may engage and stop.
- FIG. 2 shows a state in which the claw 10a and the engagement lever 11c are engaged.
- the feed lever 20 is rotatably arranged on the closing shaft 3, and a spring force which is a rotational force in the reverse direction of the arrow A is always urged by the return spring 25.
- the roller 28 is disposed near the outer periphery of the feed lever 20.
- the roller 28 is rotatable around an axis extending parallel to the input shaft 3. Since the roller 28 is engaged with the energy accumulation cam 29, the rotation of the feed lever 20 is limited.
- the feed lever 20 is always subjected to a spring force so as to rotate around the closing shaft 3 in a direction opposite to the direction indicated by the arrow A in FIG.
- the stop lever 21 is rotatably disposed on the input shaft 3.
- the stop lever 21 is provided with a storage cam 29 in the vicinity of the outer periphery.
- the energy accumulation cam 29 is rotatable around an axis (an energy accumulation cam shaft 29 a) extending in parallel with the charging shaft 3.
- the roller 28 disposed on the feed lever 20 and the energy accumulation cam 29 disposed on the stop lever 21 are configured to be able to contact each other in the circumferential direction.
- the accumulating cam 29 engages with a roller 28 that is rotatably disposed on the feed lever 20.
- An accumulating cam shaft 29 a for transmitting a driving force of a motor 7 (electric motor) as a driving unit is fixed to the accumulating cam 29.
- the rotation center P1 (FIG. 3) of the accumulating cam shaft 29a and the fourth sprocket 7h is a straight line 60 connecting the rotation center of the input shaft 3 and the rotation axis of the intermediate shaft 7e. (FIG. 3) is arranged on the top.
- the rotation center P2 (FIG. 3) of the accumulator cam shaft 29a and the fourth sprocket 7h is located above the straight line 60 (FIG. 3) connecting the center of the rotation shaft of the closing shaft 3 and the intermediate shaft 7e. (FIG. 3).
- a feed claw 23 is arranged on the feed lever 20.
- the feed claw 23 is rotatable about an axis extending in parallel with the input shaft 3 and is disposed so as to engage with the outer peripheral teeth 22 a of the claw wheel 22.
- the feed claw 23 is pushed from the radially outer side toward the closing shaft 3 by the feed claw return spring 26a so that the feed claw 23 is always engaged with the outer peripheral teeth 22a.
- the feeding claw 23 is rotatably arranged on the feeding lever 20 and engages with the outer peripheral teeth 22a of the claw wheel 22. A force is always applied to the feed claw 23 in a direction to engage with the outer peripheral teeth 22a by the return spring 26a.
- the direction of engaging with the outer peripheral teeth 22 a is a direction of pushing from the radially outer side toward the central axis of the making shaft 3.
- the claw wheel 22 is fixed to the input shaft 3 so as to rotate together with the input shaft 3.
- the claw wheel 22 has a disc shape and is formed to have a plurality of outer peripheral teeth 22a and a notch 22b in which a part of the teeth is notched on the outer peripheral side surface.
- the claw wheel 22 is fixed to the input shaft 3 and rotates around the input shaft 3 in the direction of arrow A (FIGS. 1 and 2) together with the input cam 14 that is also fixed.
- the stop lever 21 is provided with a first stop claw 24a and a second stop claw 24b as two stop claws so as to be adjacent to each other.
- Each of these first pawls 24a and second pawls 24b is rotatable about an axis extending in parallel with the axis (rotation axis) of the making shaft 3 and engages with the outer peripheral teeth 22a of the ratchet wheel 22. Is arranged.
- the first pawl 24a and the second pawl 24b are disposed so as to be rotatable with respect to the stop lever 21 and to engage with the outer peripheral teeth 22a.
- Return springs 26b and 26c are arranged on the first pawl 24a and the second pawl 24b, and a force is always applied in a direction to engage with the outer peripheral teeth 22a.
- the first pawl 24a and the second pawl 24b are inserted from the outside in the radial direction so as to be always engaged with the outer peripheral teeth 22a by the first pawl return spring 26b and the second pawl return spring 26c, respectively. It is pushed toward the shaft 3.
- the stop lever 21 is connected to the motor 7 that transmits power for swinging the feed lever 20.
- the motor 7 is a drive source that drives the opening / closing device operating mechanism, and is fixed to the support structure 4 via a spacer 70.
- the drive mechanism that transmits the drive force of the motor 7 will be described.
- the first sprocket 7 b is fixed to the output shaft 7 a of the motor 7.
- the sprocket base 5 is fixed to the support structure 4 via a spacer 5a.
- the intermediate shaft 7e is rotatably arranged on the sprocket base 5.
- the second sprocket 7d and the third sprocket 7f are fixed to the intermediate shaft 7e.
- the fourth sprocket 7h is fixed to the end of the energy storage cam shaft 29a.
- the first chain 7c is disposed so as to mesh with the first sprocket 7b and the second sprocket 7d.
- the second chain 7g is arranged so as to mesh with the third sprocket 7f and the fourth sprocket 7h.
- the output shaft 7a rotates counterclockwise (direction E), whereby the first sprocket 7b rotates. While being decelerated by the first chain 7c meshed with the first sprocket 7b and the second sprocket 7d, this driving force is transmitted. Further, the third sprocket 7f fixed to the intermediate shaft 7e together with the second sprocket 7d rotates counterclockwise (direction D). The fourth sprocket 7h is further decelerated and rotated by the second chain 7g meshed with the third sprocket 7f and the fourth sprocket 7h, and the accumulating cam shaft 29a also rotates. In this way, the driving force of the motor 7 is transmitted to the energy storage cam 29.
- the driving force of the motor 7 is transmitted to the accumulator cam 29 via the first to fourth sprockets 7b, 7d, 7f and 7h, the first chain 7c and the second chain 7g.
- the catch mechanism 11 holds the energized state of the closing spring 1 and releases the held energized state to shift to the releasing state of the closing spring 1. Therefore, the catch mechanism 11 has a configuration for engaging the closing lever 10. Specifically, as shown in FIGS. 1 and 2, the catch mechanism 11 includes a solenoid 11a, a plunger 11b, an engagement lever 11c, a return spring 12, and the like.
- the solenoid 11a is fixed to the support structure 4 and is excited in response to an input command from the outside.
- the plunger 11b presses the engagement lever 11c with the excitation of the solenoid 11a.
- the engaging lever 11c is rotatably disposed on the support structure 4 so as to engage with the tip of the plunger 11b.
- a spring force is urged counterclockwise from the return spring 12 to the engagement lever 11c, and its rotation is restricted by the plunger 11b.
- the state where the claw 10 a and the engagement lever 11 c are engaged is the state where the closing lever 10 is engaged by the catch mechanism 11. That is, the closing spring 1 is in the stored state.
- the state where the claw 10 a and the engagement lever 11 c are not engaged is the state where the catch lever 11 is not engaged by the catch mechanism 11.
- the closing spring 1 is in a released state.
- the link 2 has one end rotatably connected to a pin 8 fixed to the spring receiver 6 and the other end rotatably connected to a pin 10b fixed to the closing lever 10.
- the pin 10b is fixed to the closing lever 10 and is rotatably connected to the link 2.
- the closing spring 1 is disposed between the spring receiver 6 and the support structure 4 so as to be stretchable.
- the roller 15a is rotatably supported at the tip of an operation lever 15 having a rotation shaft 16 parallel to the input shaft 3.
- the roller 15a is engaged with the closing cam 14 so as to be freely contacted and separated during the closing operation.
- the rotational movement of the operation lever 15 is used for turning on / off a blocking portion of an opening / closing device (not shown).
- the feed claw 23 is rolled by the driving force of the motor 7 or the like to rotate the claw wheel 22, and the claw wheel 22 is used to turn the feeding shaft 3. Rotate. Then, the closing spring 1 is stored through the closing lever 10 fixed to the closing shaft 3. The opening / closing device is turned on by releasing the stored closing spring 1.
- FIGS. 4 shows a state where the return spring 47 is restored and released (corresponding to FIG. 2)
- FIG. 5 shows a state where the return spring 47 is compressed and stored (corresponding to FIG. 1). Show.
- the stopper portion 41 includes a piston plate 40 that engages with the stop lever 21, and a piston 42 that can reciprocate linearly in a predetermined direction as the piston plate 40 moves.
- a stopper 45 that guides the movement of the piston 42 in a predetermined direction and a retractable return spring 47 are provided.
- the stopper 45 is formed so as to have a space (hollow) therein so that the movement of the piston 42 is linearly reciprocated.
- the bottom of the stopper 45 is fixed to the support structure 4 via the elastic body 46 and the spacer 45a.
- a stopper plate 48 is fixed to the stopper 45 by a retaining ring 48c.
- a packing 48 a is provided at a sliding portion between the stopper plate 48 and the piston 42, and a packing 48 b is provided at a portion where the stopper plate 48 and the stopper 45 are in contact with each other.
- the packing 48a and the packing 48b are made of, for example, silicon rubber, ethylene propylene rubber, or the like.
- the stop plate 48 is formed in a disc shape, and a through hole is provided at the center thereof so that one end side of the piston 42 penetrates.
- the piston 42 is inserted into the hollow interior of the stopper 45.
- One end side of the piston 42 in the longitudinal direction protrudes from the through hole of the stopper plate 48, and a piston plate 40 that moves freely in contact with and away from the stopper 45 is fitted to one end of the piston 42 in the longitudinal direction.
- the piston plate 40 is formed in a disk shape, and the outer diameter of the disk shape is larger than the hollow inner peripheral diameter of the stopper 45. Thereby, one reciprocation of the piston 42 can be stopped by at least the piston plate 40. As shown in FIGS. 1 and 2, the piston plate 40 is engaged with the stop lever 21 so as to freely contact and separate.
- a cylindrical portion having an outer periphery larger than the inner diameter of the through hole of the stop plate 48 is formed from the vicinity of the center portion in the longitudinal direction of the piston 42 to the other end. Thereby, the other reciprocating motion of the piston 42 can be stopped by at least the cylindrical portion in the vicinity of the central portion in the longitudinal direction of the piston 42 and the stop plate 48.
- the piston 42 has a recess 42b on the other end side in the longitudinal direction.
- the recess 42b is disposed in the stopper 45 so as to be reciprocally slidable.
- a return spring 47 which is a stretchable elastic body, is disposed between the stopper 45 and the piston 42.
- a pressurizing chamber 50 is formed in a space surrounded by the hollow of the recess 42b and the stopper 45. Further, a pressure release chamber 51 is formed in a space surrounded by the side surface of the piston 42 other than the recess 42 b, the hollow of the stopper 45, and the stop plate 48. Hydraulic oil 49 is sealed in the pressurizing chamber 50 and the pressure releasing chamber 51.
- the spacer 45 a is disposed between the stopper 45 and the elastic body 46.
- the spacer 45a makes it possible to adjust the position of the stop lever 21 in the closing operation completion state and to change the position of the accumulating cam shaft 29a.
- the piston 42 is provided with a plurality of orifice holes 42a so as to penetrate in the circumferential direction of the recess 42b.
- the orifice holes 42a are provided with different hole diameters.
- the hydraulic oil 49 (fluid) ejected from the pressurizing chamber 50 to the pressure releasing chamber 51 passes through the orifice hole 42a, and the resistance force of the fluid at that time becomes a braking force.
- the braking force is increased.
- the orifice hole 42a there are a plurality of holes, and the larger the total area of the holes (jet ports), the smaller the resistance force of the fluid, so the braking force also becomes smaller.
- the braking force increases. From the above, the braking force can be adjusted by changing the diameter of each of the orifice holes 42a with a plurality of holes (or several).
- the piston 42 moves downward in FIG. 4, so that the orifice hole 42 a is blocked by the inner peripheral wall surface of the stopper 45.
- the number of holes and the total area of the jet outlet when the hydraulic oil 49 on the pressurizing chamber 50 side is ejected to the pressure releasing chamber 51 are reduced, so that the braking force is increased.
- the speed of the piston 42 gradually decreases, so the ejection speed of the hydraulic oil 49 becomes slow, and the increase in braking force is suppressed.
- the elastic body 46 is disposed between the support structure 4 and the stopper 45.
- the elastic body 46 absorbs a part of energy due to the force applied to the stopper portion 41 from the direction perpendicular to the surface in contact with the support structure 4. That is, the elastic body 46 serves as a buffer material against the impact force applied to the stopper portion 41.
- the elastic body 46 is formed of, for example, a rubber sheet, a low repulsion polymer compound, or the like.
- the pressurizing chamber 50 and the pressure releasing chamber 51 are communicated with each other through the orifice hole 42a in the course of releasing the return spring 47 that reaches the state shown in FIG.
- the orifice hole 42 a is closed by the stopper 45 so as to surround from the outside of the piston 42, and the pressurizing chamber 50 and the pressure releasing chamber 51 are shut off. .
- the stopper 41 having the above-described configuration suppresses the force caused by the rotation of the stop lever 21 in the direction opposite to the arrow B during the releasing operation of the closing spring 1. Further, during the storing operation of the closing spring 1, the stop lever 21 is pushed up in the rotation direction (arrow B direction) of the ratchet wheel 22 by the above action of the stopper portion 41.
- FIG. 2 shows a state where the closing spring 1 is stored, and the spring force is held by the catch mechanism 11.
- the operating force generated by the closing spring 1 is transmitted to the unillustrated blocking portion and blocking spring via the closing cam 14 and the operating lever 15, and the blocking spring is stored at the same time as the blocking portion is turned on.
- the stop lever 21 is pushed up in the rotation direction (arrow B direction) of the ratchet wheel 22 by the action of the stopper portion 41.
- the closing lever 10 is further rotated by the inertial force of the closing lever 10 itself and the closing spring 1, the claw wheel 22, the closing cam 14, etc., and is decelerated while releasing the closing spring 1. It rotates to the position shown in FIG. Thus, the input operation is completed.
- the closing lever 10 When the rotational speed becomes zero, the closing lever 10 is then rotated in the direction opposite to the arrow A direction (counterclockwise) by the stored force of the closing spring 1. At that time, when the closing lever 10 and the ratchet wheel 22 rotate in the opposite directions and the first retaining pawl 24a or the second retaining pawl 24b and the outer peripheral teeth 22a are engaged, the retaining lever 21 is moved in the opposite direction to the arrow A. Rotate.
- a braking force against the direction of movement of the piston 42 and the piston plate 40 is generated due to the generated pressure increase in the pressurizing chamber 50.
- the braking force is transmitted to the stop lever 21, the first stop pawl 24a or the second stop pawl 24b, and the outer peripheral teeth 22a that engage with the piston plate 40.
- the movement of the parts and the like connected to the ratchet wheel 22 and the input shaft 3 is stopped by this braking force.
- the stopper portion 41 having the above-described configuration uses the principle of the oil damper, the plurality of orifice holes 42a are closed by the stopper 45 together with the displacement of the piston 42, and the pressure increase due to the hydraulic oil 49 can be controlled. .
- FIG. 6 shows the relationship between the displacement of the stopper portion 41 and the load according to this embodiment.
- FIG. 9 shows the relationship between the displacement of the stopper portion and the load shown in the second conventional example as a comparative example. 6 and 9, the horizontal axis represents displacement, and the vertical axis represents load.
- FIG. 6 indicates the energy that can be absorbed by the stopper portion 41 according to the present embodiment.
- the hatched portion in FIG. 9 indicates the energy that can be absorbed by the stopper portion shown in the second conventional example. Comparing FIG. 6 and FIG. 9, it can be seen that the peak load is smaller in FIG. 6 even though the absorbed energy is substantially the same.
- the braking force of the stopper portion 41 according to this embodiment can be controlled by the orifice hole 42a.
- the peak load of the stopper portion 41 according to the present embodiment can be reduced by appropriately arranging the orifice holes 42a.
- FIG. 1 shows a state in which the closing spring 1 is released.
- the output shaft 7a and the first sprocket 7b rotate counterclockwise (arrow E). Accordingly, these driving forces are transmitted to the second sprocket 7d and the third sprocket 7f via the first chain 7c, and the second sprocket 7d and the third sprocket 7f are counterclockwise (arrow D). Rotate. Further, these driving forces are transmitted to the fourth sprocket 7h via the second chain 7g, and the fourth sprocket 7h rotates counterclockwise (arrow C).
- the accumulating cam shaft 29 a and the accumulating cam 29 rotate counterclockwise, and the roller 28 engaged with the accumulating cam 29 swings along the shape of the accumulating cam 29.
- the feed lever 20 also starts swinging around the closing shaft 3, the feed claw 23 and the outer peripheral teeth 22a are engaged, and the claw wheel 22 is rotated clockwise (in the direction of arrow A). become.
- the first pawl 24 a and the second pawl 24 b engage with the outer peripheral teeth 22 a so as to prevent the reverse rotation of the hook wheel 22.
- the rotational center P1 of the accumulating cam shaft 29a and the fourth sprocket 7h is It arrange
- the distance between the fourth sprocket 7h and the third sprocket 7f changes from the length of L1 to the length of L2 by the rotation of the angle ⁇ 1 described above.
- the distance between the axes of both sprockets changes by the distance S shown in FIG.
- the feed lever 20 rotates in the direction of arrow A because the energy storage cam 29 and the roller 28 are engaged.
- the feeding claw 23 is positioned at the notch 22 b, so that it is not engaged by a swinging motion caused by the rotation of the energy accumulation cam 29.
- the oil damper type using the hydraulic oil 49 is used for the stopper portion 41, the first catching pawl accompanying the reverse rotation of the claw wheel 22 immediately after the closing operation is completed.
- the impact force generated by the engagement between the outer pawls 23a and the outer pawls 23a can be efficiently absorbed, and the peak load at that time can be reduced.
- first sprocket 7b and the fourth sprocket 7h are not directly connected by a chain, but the second sprocket 7d and the third sprocket 7f are arranged together with the intermediate shaft 7e, and the intermediate shaft 7e and the accumulating cam shaft 29a are inserted.
- the respective centers of the shaft 3 and the rotation axis are arranged on substantially the same line, and the driving force of the motor 7 is transmitted by the first chain 7c and the second chain 7g.
- the motor 7 can be freely arranged in accordance with the layout change of the opening / closing device operating mechanism, so that the entire device can be downsized.
- the spacer 5a is disposed between the sprocket base 5 and the support structure 4, so that the distance between the output shaft 7a, the intermediate shaft 7e, and the accumulating cam shaft 29a can be reduced. Adjustment is possible by changing the thickness. As a result, the initial slack of the first chain 7c and the second chain 7g can be adjusted, and the chain can be prevented from falling off.
- the distance between the output shaft 7a and the intermediate shaft 7e can be adjusted by changing the thickness of the spacer 70.
- the initial slack of the first chain 7c can be adjusted, and the chain can be prevented from falling off.
- the position of the stop lever 21 in the closing operation completion state can be adjusted, and the energy accumulation cam shaft 29a.
- the position of can be changed.
- the slack of the second chain 7g can be adjusted.
- the elastic body 46 since the elastic body 46 is arranged, the impact force acting on the stopper portion 41 can be absorbed by the elastic body 46, so that the peak load can be reduced. As a result, it is possible to prevent the roller 28, the energy storage cam 29, the claw wheel 22 and the like from being damaged and the life from being shortened. In addition, it is not necessary to reinforce the rigidity of the support structure 4 that supports the stopper portion 41 in accordance with the peak load, and the entire device can be downsized.
- FIG. 7 is a front view showing a part of the opening / closing device operating mechanism, and corresponds to FIG.
- FIG. 8 is a diagram showing a relative positional relationship among the rotation shaft of the input shaft 3, the energy accumulation cam shaft 29a, and the intermediate shaft 7e, and corresponds to FIG.
- the structure of the stopper part 41 shown in FIG. 7 shall be the same as that of what is shown in FIG.4 and FIG.5.
- symbol is attached
- the input shaft 3 shows only the center of the shaft, and details of the shape and the like are omitted.
- the rotation center P1 of the fourth sprocket 7h is arranged on a straight line 60 that connects the intermediate shaft 7e and the rotation center (the center of the rotation shaft) of the input shaft 3 in the first embodiment shown in FIG. Is a modified version.
- the stopper portion 41 is bordered by a straight line 60 connecting the intermediate shaft 7 e after the closing operation is completed and the rotation center of the closing shaft 3.
- the rotation center P1 of the fourth sprocket 7h is arranged on the side.
- the intermediate shaft 7e after the completion of the energy storage operation and the rotation center P2 of the fourth sprocket 7h are arranged.
- the position of the accumulator cam shaft 29a is adjusted by the spacer 45a and the elastic body 46 provided between the stopper 45 of the stopper portion 41 and the support structure 4, and linearly
- the rotation center P1 of the fourth sprocket 7h is arranged on the stopper portion 41 side with reference to 60.
- a straight line 61 connecting the rotation center of the making shaft 3 and the rotation center P1 of the fourth sprocket 7h, a rotation center P2 corresponding to the rotation center P2 shown in FIG. Is an angle ⁇ 1 formed by a straight line 62 connecting the two.
- the angle ⁇ 2 formed by the straight line 61 and the straight line 60 is approximately half the angle ⁇ 1 formed by the straight line 61 and the straight line 62 ( ⁇ 1 / 2) as shown in FIG. Become.
- the same operation as in the first embodiment can be obtained. That is, the inter-axis distance L1 between the intermediate shaft 7e and the rotation center P1 of the fourth sprocket 7h after the closing operation is completed, and the inter-axis distance between the intermediate shaft 7e and the rotation center P2 of the fourth sprocket 7h after the accumulation operation is completed.
- the difference from L2 is L2-L1 ⁇ 0
- the distance between the axes hardly changes.
- SYMBOLS 1 Loading spring, 2 ... Link, 3 ... Loading shaft, 4 ... Support structure, 5 ... Sprocket stand, 5a ... Spacer, 6 ... Spring receiver, 7 ... Motor, 7a ... Output shaft, 7b ... 1st sprocket, 7c ... 1st chain, 7d ... 2nd sprocket, 7e ... Intermediate shaft, 7f ... 3rd sprocket, 7g ... 2nd chain, 7h ... 4th sprocket, 8 ... Pin, 10 ... Loading lever, 10a ... Claw, 10b ... Pin 11 ... Catch mechanism, 11a ... solenoid, 11b ...
- spacer 46 ... elastic body, 47 ... return spring, 48 ... stop plate, 48a ... packing, 48b ... packing, 48c ... retaining ring, 49 ... hydraulic oil, 50 ... pressurizing chamber, 51 ... Relief chamber, 60, 61, 62 ... Line, 70 ... Spacer
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- Mechanisms For Operating Contacts (AREA)
- Push-Button Switches (AREA)
Abstract
Description
以下、図1ないし図6を参照しながら本発明に係る開閉装置操作機構の第1の実施形態について説明する。図1は、本発明の第1の実施形態による開閉装置操作機構の投入動作完了状態を示す展開正面図である。図2は、第1の実施形態による開閉装置操作機構の蓄勢動作完了状態を示す展開正面図である。図3は図1および図2の投入シャフトと第4スプロケットと中間軸部を示す部分図である。図4は図2に示す操作機構のストッパ部の断面図であり、図5は図1に示す操作機構のストッパ部の断面図である。図6は第1の実施形態によるストッパ部の変位と荷重の関係を示す。なお、図9は従来例によるストッパ部の変位と荷重の関係を示すものであり、特に図6と比較するために例示した図である。
次に、本実施形態の開閉装置操作機構の投入動作について、図1ないし図6を用いて説明する。図2は投入ばね1が蓄勢された状態であり、そのばね力はキャッチ機構11により保持されている。
続いて、本実施形態の開閉装置操作機構の蓄勢動作について、図1ないし図5を用いて説明する。
となる。この軸間距離の変化に伴うチェーンのたるみ量に大きな差異が生じことになる。すなわち、本実施形態では、軸間距離の変化に伴うチェーンのたるみ量を小さくすることができる。
次に、本発明に係る開閉装置操作機構の第2の実施形態について、図7および図8を参照して説明する。図7は開閉装置操作機構の一部を示す正面図であり、図1に対応する。図8は投入シャフト3の回転軸と蓄勢カム軸29aと中間軸7eの相対位置関係を示す図であり、図3に対応する。また、図7に示すストッパ部41の構成は、図4および図5に示すものと同様であるとする。なお、第1の実施形態の形態と同一または類似の部分には共通の符号を付し、重複する説明は省略する。また、図8において、投入シャフト3は、軸中心のみを示し、形状等の詳細は省略している。
L2-L1≒0
となり、軸間距離はほとんど変化しないことになる。
以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。例えば、開閉装置以外でも、上記の操作機構を用いる同様の装置に適用してもよい。また、各実施形態の特徴を組み合わせてもよい。さらに、これらの実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形には、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。
Claims (10)
- 開閉装置の可動接点を往復駆動して、その開閉装置を遮断状態と投入状態との間で相互に移行させる開閉装置操作機構であって、
支持構造体と、
第1の回転軸方向に延びて、前記支持構造体に回転自在に支持された投入シャフトと、
前記投入シャフトに固定されて前記投入シャフトと共に回転する略円板状で、この外周側面に周方向に沿って複数の外周歯が形成された爪車と、
前記爪車に軸方向に並んで配置されて、前記投入シャフトの周りを周方向に揺動可能な板状で、外周付近に前記投入シャフトに平行に延びる第2の回転軸周りに回転可能な送りレバー用ローラを備えた送りレバーと、
前記送りレバーに前記第1の回転軸方向に並んで配置されて、前記投入シャフトの周りを周方向に揺動可能な板状で、外周付近に前記投入シャフトに平行に延びる蓄勢カム軸周りに回動可能な蓄勢カムを備え、この蓄勢カムと前記送りレバー用ローラとが周方向に互いに接触可能に構成された止めレバーと、
前記支持構造体に固定されて、前記送りレバーに揺動するための動力を伝達可能な駆動部と、
前記送りレバーに取り付けられて、前記外周歯に係合可能で、前記駆動部から伝達された動力を前記爪車に伝達して前記爪車および投入シャフトを少なくとも一方向に回転させる送り爪と、
前記止めレバーに取り付けられて、前記爪車に係合して、前記爪車および前記投入シャフトが前記一方向に対して逆回転することを抑制する複数の止め爪と、
前記投入シャフトの回転に伴って伸縮するように構成された投入ばねと、
前記投入シャフトに固定されて、前記投入シャフトの回転により前記投入ばねを伸縮させる投入レバーと、
前記投入ばねが蓄勢された状態を保持可能なキャッチ機構と、
前記投入シャフトに固定されて前記投入シャフトと共に回転する投入カムと、
前記駆動部の出力軸に固定された第1スプロケットと、
前記支持構造体に固定されたスプロケット台と、
前記スプロケット台に回転可能に支持された中間軸と、
前記中間軸に固定されて前記中間軸と共に回転可能な第2スプロケットと、
前記中間軸に固定されて前記中間軸と共に回転可能な第3スプロケットと、
前記蓄勢カム軸に固定されて回転可能な第4スプロケットと、
前記第1スプロケットと前記第2スプロケットとに噛合する第1チェーンと、
前記第3スプロケットと前記第4スプロケットとに噛合する第2チェーンと、
を有することを特徴とする開閉装置操作機構。 - 前記第1の回転軸と、前記蓄勢カム軸と、前記中間軸との三つの軸の中心が前記開閉装置の投入動作完了後の前記投入ばねの蓄勢動作時に、略直線上に位置する
ことを特徴とする請求項1に記載の開閉装置操作機構。 - 前記駆動部と前記支持構造体との間にスペーサを配置した
ことを特徴とする請求項1または請求項2に記載の開閉装置操作機構。 - 前記スプロケット台と前記支持構造体との間にスペーサを配置した
ことを特徴とする請求項1ないし請求項3のいずれか一項に記載の開閉装置操作機構。 - 前記止めレバーと前記支持構造体との間に挟まれるように前記支持構造体に固定され、前記止めレバーに係合可能に前記止めレバーの回転を抑制するストッパ部と、をさらに有し、
前記ストッパ部は、
前記止めレバーに係合するピストン板と、
一端には前記ピストン板が固定され、他端は接離自由にされて、前記止めレバーと前記支持構造体との間に前記止めレバーを係合可能に往復移動するピストンと、
内部が中空に形成され、当該中空に前記ピストンをガイドするように収容すると共に、前記支持構造体に固定されたストッパと、
前記ピストンの前記往復移動の動作範囲を規制可能に前記ストッパに嵌着された止め板と、
前記ピストンと前記ストッパとの間に配置されて前記ピストンを一方向に付勢する復帰ばねと、を備え
前記ピストンと前記ストッパと前記止め板とで囲まれた空間に作動油が封入された
ことを特徴とする請求項1に記載の開閉装置操作機構。 - 前記ピストンの他端側に凹部が形成され、前記凹部の内周側と前記ストッパとで囲まれて形成される加圧室と、前記凹部の外周側と前記ピストンと前記ストッパと前記止め板とで囲まれて形成される放圧室とが、前記ピストンの一端に固定された前記ピストン板と止め板とが最も離れた前記往復移動位置で連通するように、複数のオリフィス穴が設けられ、前記ピストンの前記往復移動に際して前記加圧室と前記放圧室との間を前記封入された作動油が前記複数のオリフィス穴のいずれかを介して流動可能とされる
ことを特徴とする請求項5に記載の開閉装置操作機構。 - 前記ストッパ部と前記支持構造体との間にスペーサまたは弾性体の少なくともいずれかを配置した
ことを特徴とする請求項5または請求項6に記載の開閉装置操作機構。 - 前記開閉装置の投入動作完了後の前記投入ばねの蓄勢動作時において、前記投入シャフトの前記第1の回転軸と前記中間軸とを結ぶ第1の直線を境にして前記ストッパ側に前記蓄勢カムの前記蓄勢カム軸が配置される
ことを特徴とする請求項5ないし請求項7のいずれか一項に記載の開閉装置操作機構。 - 前記開閉装置の投入動作完了後の前記投入ばねの蓄勢動作時において、前記投入シャフトの前記第1の回転軸と前記中間軸とを結ぶ第1の直線と、前記投入シャフトの前記第1の回転軸と前記蓄勢カムの前記蓄勢カム軸とを結ぶ第2の直線とのなす第1の角度は、前記投入ばねの蓄勢完了状態における前記投入シャフトの前記第1の回転軸と前記中間軸とを結ぶ第3の直線と、前記第2の直線とのなす第2の角度と、略等しい
ことを特徴とする請求項8に記載の開閉装置操作機構。 - 往復可能な可動接点と、この可動接点を駆動する操作機構とを有し、前記可動接点の移動によって遮断状態と投入状態との間で相互に移行しうる開閉装置であって、
前記操作機構は、
支持構造体と、
第1の回転軸方向に延びて、前記支持構造体に回転自在に支持された投入シャフトと、
前記投入シャフトに固定されて前記投入シャフトと共に回転する略円板状で、この外周側面に周方向に沿って複数の外周歯が形成された爪車と、
前記爪車に軸方向に並んで配置されて、前記投入シャフトの周りを周方向に揺動可能な板状で、外周付近に前記投入シャフトに平行に延びる第2の回転軸周りに回転可能な送りレバー用ローラを備えた送りレバーと、
前記送りレバーに前記第1の回転軸方向に並んで配置されて、前記投入シャフトの周りを周方向に揺動可能な板状で、外周付近に前記投入シャフトに平行に延びる蓄勢カム軸周りに回動可能な蓄勢カムを備え、この蓄勢カムと前記送りレバー用ローラとが周方向に互いに接触可能に構成された止めレバーと、
前記支持構造体に固定されて、前記送りレバーに揺動するための動力を伝達可能な駆動部と、
前記送りレバーに取り付けられて、前記外周歯に係合可能で、前記駆動部から伝達された動力を前記爪車に伝達して前記爪車および投入シャフトを少なくとも一方向に回転させる送り爪と、
前記止めレバーに取り付けられて、前記爪車に係合して、前記爪車および前記投入シャフトが前記一方向に対して逆回転することを抑制する複数の止め爪と、
前記投入シャフトの回転に伴って伸縮するように構成された投入ばねと、
前記投入シャフトに固定されて、前記投入シャフトの回転により前記投入ばねを伸縮させる投入レバーと、
前記投入ばねが蓄勢された状態を保持可能なキャッチ機構と、
前記投入シャフトに固定されて前記投入シャフトと共に回転する投入カムと、
前記駆動部の出力軸に固定された第1スプロケットと、
前記支持構造体に固定されたスプロケット台と、
前記スプロケット台に回転可能に支持された中間軸と、
前記中間軸に固定されて前記中間軸と共に回転可能な第2スプロケットと、
前記中間軸に固定されて前記中間軸と共に回転可能な第3スプロケットと、
前記蓄勢カム軸に固定されて回転可能な第4スプロケットと、
前記第1スプロケットと前記第2スプロケットとに噛合する第1チェーンと、
前記第3スプロケットと前記第4スプロケットとに噛合する第2チェーンと、
を有することを特徴とする開閉装置。
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CN201280066730.0A CN104040665B (zh) | 2012-01-11 | 2012-12-26 | 开闭装置和开闭装置操作机构 |
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CN2546998Y (zh) * | 2002-05-10 | 2003-04-23 | 杭州红申电器有限公司 | 断路器电驱动机构中的传动装置 |
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2012
- 2012-01-11 JP JP2012003280A patent/JP5951262B2/ja active Active
- 2012-12-26 WO PCT/JP2012/008328 patent/WO2013105196A1/ja active Application Filing
- 2012-12-26 EP EP12865117.1A patent/EP2804195B1/en not_active Not-in-force
- 2012-12-26 BR BR112014016545A patent/BR112014016545A8/pt not_active IP Right Cessation
- 2012-12-26 CN CN201280066730.0A patent/CN104040665B/zh not_active Expired - Fee Related
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2014
- 2014-05-30 US US14/291,580 patent/US9349554B2/en not_active Expired - Fee Related
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JPH01307123A (ja) * | 1988-06-03 | 1989-12-12 | Meidensha Corp | 電力用しゃ断器のばね操作機構 |
JPH05266764A (ja) * | 1992-03-19 | 1993-10-15 | Toshiba Corp | 開閉機器用電動ばね操作機構 |
JP2007188775A (ja) | 2006-01-13 | 2007-07-26 | Toshiba Corp | 開閉装置の操作機構 |
JP2007294363A (ja) | 2006-04-27 | 2007-11-08 | Toshiba Corp | 開閉装置の操作機構 |
JP2011060571A (ja) | 2009-09-10 | 2011-03-24 | Toshiba Corp | 開閉装置操作機構 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112382517A (zh) * | 2020-11-02 | 2021-02-19 | 平高集团有限公司 | 一种弹簧操动机构合闸***及弹簧操动机构 |
Also Published As
Publication number | Publication date |
---|---|
EP2804195B1 (en) | 2016-10-26 |
US9349554B2 (en) | 2016-05-24 |
US20140262714A1 (en) | 2014-09-18 |
BR112014016545A2 (pt) | 2017-06-13 |
JP2013143285A (ja) | 2013-07-22 |
CN104040665B (zh) | 2016-08-17 |
CN104040665A (zh) | 2014-09-10 |
JP5951262B2 (ja) | 2016-07-13 |
EP2804195A4 (en) | 2015-09-30 |
BR112014016545A8 (pt) | 2017-07-04 |
EP2804195A1 (en) | 2014-11-19 |
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