JP5414634B2 - Hand-wound wheel train, watch movement equipped with the train wheel, and watch equipped with the movement - Google Patents

Description

  The present invention relates to a manually wound wheel train, a timepiece movement including the wheel train, and a timepiece including the movement.

  Among mechanical timepieces, a hand-wound timepiece, when the mainspring is fully wound, the hoisting torque increases rapidly and a feeling of tightening is obtained. However, if an even higher hoisting force (torque) is applied, the related parts may be broken, making it impossible to perform hoisting or the like. That is, a hand-wound timepiece usually does not have a torque limiter function that defines an upper limit value of the winding torque, that is, a safety function or a damage prevention function.

  On the other hand, in a self-winding timepiece, a slipping attachment is provided in the barrel, and the mainspring is automatically wound until the winding torque reaches a predetermined level defined in advance by the attachment. Exceeds a certain level defined by the attachment, the slipping attachment slides in the barrel, and the outer peripheral side end of the mainspring rotates in the barrel to prevent excessive winding (for example, Patent Documents) 1).

  Here, it is unavoidable that the slipping attachment occupies a certain amount of volume in the barrel, and if the slipping attachment is made thin in order to minimize the occupied volume, the torque becomes small and the level at which the mainspring is wound up is reduced. Lower. On the other hand, to increase the winding torque, it is necessary to increase the thickness of the slipping attachment. As a result, the volume occupied by the mainspring in the barrel (the effective volume of the barrel) decreases, and the number of windings or the duration of the mainspring (power reserve amount) ) Is reduced.

  It has been proposed to provide a torque limiter mechanism or function at the crown where the input side idles relative to the output side when a torque exceeding a certain value is applied (Patent Document 2).

  However, in the method proposed in Patent Document 2, the upper limit of the torque is not particularly defined within the range of the movement of the watch, and the function can be exerted only in the complete state with the crown attached. It is difficult to carry out such tests. In addition, it is difficult to avoid the crown becoming complex and the crown becoming unnatural. Further, if such a crown is mass-produced, it is not easy to accurately maintain a predetermined slip torque (a threshold torque at which slip occurs). In addition, it is practically impossible to change the torque according to the preference of the person (user).

JP 2002-71836 A JP 2009-115800 A

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a manually wound wheel train capable of setting a winding torque to a desired level or less and a movement for a watch including the train wheel. And providing a timepiece having the movement.

  The manual winding wheel train of the present invention is a hand winding wheel train comprising a plurality of gears meshed with each other to transmit the rotation of the winding stem to a square wheel wheel so as to achieve the above-mentioned object. An input side member provided with an engaging portion and an output side member provided with an output side friction engaging portion, facing each other in each friction engaging portion, and frictionally engaging each other in the facing portion; Elastic means for pressing one friction engagement portion against the other friction engagement portion.

  In the hand-rolled wheel train of the present invention, “an input side member having an input side frictional engagement portion and an output side member having an output side frictional engagement portion which face each other in the respective frictional engagement portions. Between the input side member and the output side member because there is provided a frictional engagement between the input side member and the output side member. The torque limiter function is built in, and the torque that acts between the input side member and the output side member is the threshold torque (maximum) defined by the frictional engagement force between the input side and output side frictional engagement parts. Friction torque or slip torque) or less, the torque is transmitted as a hand-wound torque from the input side member to the square wheel through the output side member, and the mainspring is wound up, and the input side member and the output side member Torque acting during When the threshold torque (maximum friction torque or slip torque) defined by the friction engagement force between the output side friction engagement parts is exceeded, slip occurs between the input side member and the output side member, The winding of the mainspring is prohibited, and the mainspring can be reliably wound within a range that does not damage the mainspring and other related parts. That is, in the hand-wound wheel train of the present invention, since the limit value of torque (maximum friction torque) at the time of winding is incorporated in the train wheel, on the other hand, it is not necessary to provide a slipping attachment in the barrel, You can maximize the length of the mainspring to maximize the volume of the mainspring, maximize the duration of the mainspring, or use the mainspring with the highest torque to maximize the accuracy of the watch. On the other hand, the torque limiter function can be completed with the movement, and it is not necessary to incorporate the torque limiter function or slip torque generating mechanism into the exterior parts such as the crown, so the exterior parts such as the crown are complicated and enlarged. It can be avoided and the possibility of restricting the exterior can be minimized. The manually wound wheel train typically has a torque limiter function at one place, but may have a torque limiter function at a plurality of places.

  In the manually wound wheel train of the present invention, typically, the input side frictional engagement portion of the input side member and the output side frictional engagement portion of the output side member face each other in the extending direction of the rotation center axis.

  In that case, it is suitable for use in a torque transmission wheel train having a plurality of gear portions coaxially (concentrically). Such a car typically consists of a round hole car. However, such a car may be at least a part of a plurality of round hole intermediate cars that connect the round hole car and the square hole car.

  In the hand-rolled wheel train of the present invention, instead of the input side frictional engagement portion of the input side member and the output side frictional engagement portion of the output side member facing the extending direction of the rotation center axis, the input side member The input side frictional engagement portion and the output side frictional engagement portion of the output side member may face each other in the radial direction with respect to the rotation center axis.

  In that case, typically, one of the input-side member and the output-side member includes a shaft, and the other of the input-side member and the output-side member is elastically frictionally engaged with the shaft. An elastic arm portion that elastically holds the shaft is provided. In this case, typically, the former is integrally coupled with the pinion portion (the small gear portion having a relatively small diameter), and the latter is integrally coupled with the gear portion (the large gear portion having a relatively large diameter). Combined. However, the reverse may be possible. This structure is suitable for being applied to at least one of a plurality of round hole intermediate wheels (round hole transmission wheels) rather than a round hole wheel in a manually wound wheel train. The two gear portions may have the same diameter.

  In the hand-rolled wheel train of the present invention, even if the elastic means is formed on a part of at least one of the input side member and the output side member, the elastic means is separate from the input side member and the output side member. Further, a pressing means for elastically pressing the input side member and the output side member by the elastic force of the elastic means may be provided.

  Typically, the former is suitable for radial friction engagement, and the latter is suitable for axial friction (direction parallel to the direction in which the axis extends). However, the reverse may be possible.

  When the elastic means is a separate body in the hand-wound wheel train of the present invention, typically, the elastic means is a disc spring, a coil spring or a wave spring, and the pressing means is provided with a pressing force adjusting mechanism in the form of a screw. .

  When the pressing means includes a pressing force adjusting mechanism in the form of a screw, the pressing force is adjusted simply by adjusting the screwing state of the screw, and the threshold or limit torque of the torque limiter function, in other words, the magnitude of the slip torque is adjusted. Can be done. Therefore, the slip torque itself can be set to a desired level, for example, it can be possible for the user himself to adjust the slip torque. The adjustment mechanism may be in a form other than a screw if desired.

  The elastic means can be appropriately selected as long as a pressing force capable of generating a desired frictional engagement force can be applied. In order to generate as much elastic force as possible (and therefore as much slip torque as possible) with as small an occupied volume as possible. For example, a disc spring is preferable. However, a wave spring or the like may be used.

  In the hand-wound wheel train of the present invention, the input side member typically comprises a lower round hole wheel meshed with a chisel wheel, and the output side member comprises an upper round hole wheel meshed with a round hole intermediate wheel. In this specification, the “upper” stage refers to the back cover side, and the “lower” stage refers to the dial side. However, the reverse may be possible depending on the winding stem arrangement.

  In that case, the space associated with the relative positional relationship between the round hole wheel and the round wheel and the relative positional relationship between the round hole wheel and the round hole intermediate wheel can be effectively used for the incorporation of the friction engagement portion. .

  The hand-rolled wheel train of the present invention typically has a hollow rotary support shaft portion fitted with a round hole guide pin at the center hole and provided with a small-diameter male screw portion on the distal end side. The upper round hole wheel is a non-cylindrical hole so that the lower round hole wheel is rotatably fitted to the base end side middle diameter portion of the part and the upper round hole wheel rotates integrally with the hollow rotation support shaft portion. Is fitted into a non-cylindrical portion in the middle of the hollow rotation support shaft portion, and a female screw member is screwed into the male screw portion on the distal end side of the hollow rotation support shaft portion. The axially opposed surfaces of the lower round wheel and the upper round wheel are configured to be frictionally engaged via elastic means between the member and the upper round wheel.

  In this case, the degree of frictional engagement between the upper round hole wheel and the lower round hole wheel can be reliably adjusted only by adjusting the degree of screwing between the female screw member and the male screw member. Here, the non-cylindrical hole portion of the upper round hole wheel and the non-cylindrical portion of the hollow rotary support shaft portion may have any shape as long as the cross section is deviated from a circle. It consists of a “D” -shaped cross section whose side is cut off linearly and a track-like cross section where both sides of the circle are cut off. In addition, as long as they are fitted so that they are in contact with each other at least in a shape portion deviated from a circle, the cross-sectional shapes of the non-cylindrical hole portion of the upper round hole wheel and the non-cylindrical portion of the hollow rotary support shaft portion are different from each other. May be.

  In the manually wound wheel train of the present invention, even if the female screw member is smaller in diameter than the upper round hole wheel and is located in the central recess of the upper round hole wheel, the female screw member is equal to or more than the upper round hole wheel. It may be located above the upper round hole wheel in diameter.

  In the latter case, it is easy to turn the female screw member in the assembled state, and it is easy to adjust the threshold torque of the torque limiter function, that is, the slip torque, in the assembled state.

  Further, in the hand-wound wheel train of the present invention, the rotation center shaft of the lower round wheel and the upper round wheel is composed of a solid shaft portion configured to be guided by the tenon receiving portions at both ends, and the shaft The upper side of the part may be guided by a receiving plate that is detachably fixed to the train wheel bridge.

  In that case, by removing the receiving plate, the portion of the round hole wheel including the slip structure can be taken out of the movement, and the threshold torque of the torque limiter function, that is, the magnitude of the slip torque can be adjusted. Here, for example, the upper round wheel is fitted to the rotation center shaft so as to be rotated integrally. In that case, the rotation center shaft in the form of a solid shaft portion is a shaft portion formed by integrating the round hole wheel guide pin and the hollow rotation support shaft portion, and the tenon portions at both ends can be freely rotated by the tenon receiver. It will be supported.

  In order to achieve the above object, the timepiece movement of the present invention includes the above-described manually wound wheel train.

  In order to achieve the above object, the timepiece of the present invention has the timepiece movement, that is, the timepiece movement provided with the above-described manually wound wheel train.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional explanatory view of a part of a timepiece having a movement provided with a manually wound wheel train according to a preferred embodiment of the present invention. FIG. 2 is an explanatory plan view of a movement portion including a manually wound wheel train in the timepiece of FIG. 1. Sectional explanatory drawing similar to FIG. 1 about one part of the timepiece which has the movement provided with the hand winding wheel train as another preferable one Example (modified example of this invention) of this invention. FIG. 4 shows another modified example of the round hole wheel structure part of the manually wound wheel train of FIG. 3, (a) is a plane explanatory view of one modified example, and (b) is a cross sectional explanatory view of (a). FIG. 4 shows another modified example of a gear having a slip mechanism in the manually wound wheel train of FIG. 3, (a) is an explanatory plan view of another modified example, and (d) is yet another modified example. FIG.

  A preferred embodiment of the present invention will be described based on a preferred embodiment shown in the accompanying drawings.

  A hand-wound timepiece 3 according to a preferred embodiment of the present invention is a book provided with a hand-rolled wheel train 1 according to a preferred embodiment of the present invention as shown in the cross-sectional explanatory view of FIG. 1 and the plan explanatory view of FIG. It has a movement 2 of a preferred embodiment of the invention.

  As can be seen from the cross-sectional view of FIG. 1, the movement 2 of the timepiece 3 includes a main plate 11 at the center in the thickness direction D, and the winding stem 20 can enter and exit in the directions A1 and A2 and around the central axis B. The base plate 11 is supported so as to be rotatable in the B1 and B2 directions.

  The winding stem 20 includes a large-diameter flange-shaped portion 21, a large-diameter cylindrical portion 22, a small-diameter portion 23, a medium-diameter flange-shaped portion 24, a medium-diameter cylindrical portion 25, a prismatic portion 26, a distal-end-side small-diameter portion 27, and the like. A pinion wheel 15 is fitted to the rectangular column portion 26 so as to be relatively displaceable in the A1 and A2 directions, and a chime wheel 18 is fitted to the medium diameter cylindrical portion 25 so as to be relatively rotatable in the B1 and B2 directions. Reference numeral 16 is an assistance, 17 is a kanuki, and 14 is a small train.

  On the back cover 7 side of the main plate 11 (D1 direction in FIG. 1), there are a train wheel tray 12 and a barrel holder 13. Between the main plate 11 and the train wheel bridge 12 positioned on the back cover 7 side of the main plate 11 and on the dial plate 19 side of the main plate 11 (D2 direction as viewed in FIG. 1), the clock 3 displays the time and time. Such a clock / handwheel train 6 (FIG. 2) is provided. The train wheel 6 includes an escape wheel 6a and the like.

  A barrel complete 30 is disposed between the main plate 11 and the barrel holder 13. The barrel complete 30 is provided with a mainspring body 34 in a barrel casing 33 formed by a barrel main body 31 and a barrel cover 32, and the mainspring body 34 in the form of a spiral spring is an outer casing 34a at the outer peripheral end portion of the barrel main body 31. The inner peripheral surface 31a is attached to the barrel complete 35 at the inner peripheral end 34b. The barrel complete body 31 is engaged with the gear of the clock train wheel train 6 at the gear portion 31c. The barrel complete 35 is rotatably supported by the base plate 11 and the barrel holder 13 through bearings 36a and 36b, and a square wheel 37 is attached to the protruding end 35a of the barrel 35 by a square screw 37a. .

  The hand-rolled wheel train 1 includes a round hole wheel structure 8 meshed with the chi-wheel 18, a round hole intermediate wheel mechanism 9 connected to the round hole wheel structure 8, and a square hole connected to the round hole intermediate wheel mechanism 9. Including a car 37.

  In this example, the round hole intermediate wheel mechanism 9 includes a first round hole intermediate wheel 41 and a second round hole intermediate wheel 42 that are rotatably supported by the barrel holder 13 and the train wheel bridge 12. The first round hole intermediate wheel 41 includes a shaft 41a, a first round hole intermediate gear 41b integral with the shaft 41a, and a first round hole intermediate gear integral with the shaft 41a and having a smaller diameter than the first round hole intermediate gear 41b. The first round hole intermediate gear 41b is engaged with the output side gear of the round hole wheel structure 8, and the first round hole intermediate pinion 41c is engaged with the second round hole intermediate wheel 42. The second round hole intermediate wheel 42 meshes with the square hole wheel 37.

  In this example, the round hole wheel structure 8 that constitutes the manually wound wheel train 1 together with the round hole intermediate wheel mechanism 9 and the square hole wheel 37 is attached to the train wheel bridge 12.

  More specifically, the round hole wheel structure 8 has a support shaft structure including a round hole wheel guide pin 51 fitted to the train wheel bridge 12 and a male screw member 53 fitted to the round hole wheel guide pin 51. 50, a lower round wheel 60, an upper round wheel 70, an elastic member 80, and a female screw member 90.

  The round hole wheel guide pin 51 of the support shaft structure 50 includes a large-diameter flange-like portion or a flange portion 51a at the base end, a small-diameter fitting shaft portion 51b at the distal end, and a plurality of medium-diameter shaft portions in the middle. 51d and a small diameter shaft portion 51e.

  The male screw member 53 includes a cylindrical main body portion 54, a flange-like portion 55 on the proximal end side of the main body portion 54, and a male screw portion 56 on the distal end side of the main body portion 54. The main body portion 54 includes a non-cylindrical cylindrical portion 57 on the proximal end side. The non-cylindrical cylindrical portion 57 is a portion having a different diameter on a part of the outer peripheral surface so that the cross-sectional shape becomes non-circular (that is, a shape deviated from the circular shape) as indicated by an imaginary line 57i in FIG. 57i. Here, the non-cylindrical cylindrical portion 57 of the male screw member 53 may have any shape as long as the cross section is deviated from a circle, for example, “D” in which one side of the circle is linearly cut off. It consists of a cross section in the shape of a letter or a cross section in the shape of a track with both sides of the circle cut off. The flange-like portion 55 is composed of two flange-like portions having different diameters, that is, a first flange-like portion 58 and a second flange-like portion 59. A recess 58a is provided on the end surface.

  An annular lower round wheel 60 is disposed on the back surface 58b of the first flange-shaped portion 58 at the outer periphery 59a of the second flange-shaped portion 59. The annular lower round wheel 60 is fitted to the second flange-shaped portion 59 so as to be slidable and rotatable, and the dial-side surface portion 61 can also slide on the surface 58 b of the first flange-shaped portion 58. . A region including a portion that slides with respect to the surface 58 b of the first flange-shaped portion 58 in the dial-side surface portion 61 of the lower round wheel 60 is a circular or annular concave portion 62. The bottom surface 63 of the first flange-shaped portion 58 is in sliding contact with the bottom surface 63. The lower round wheel 60 is in sliding contact with the outer peripheral surface 59 a of the second flange-shaped portion 59 at the cylindrical inner peripheral surface 64. The lower round hole wheel 60 includes a gear portion 65 along the outer periphery, and meshes with the gear portion 18 a of the chisel wheel 18 by the gear portion 65.

  Accordingly, when the winding stem 20 is rotated in the B1 direction around its central axis B at the normal position (winding stem 0-th position) P0 where the winding stem 20 is pushed in the A2 direction, B1 of the winding stem 20 The chisel wheel 18 meshed with the gear portion 18b of the handwheel 15 rotated integrally with the winding stem 20 in the B1 direction in response to the direction rotation is also rotated in the B1 direction. The lower round wheel 60, which is meshed with the gear portion 18a by the gear portion 65, is rotated around the central axis E in the E1 direction. An annular surface portion 67 protruding toward the back cover 7 side is formed in the inner peripheral side region 66a of the surface 66 on the back cover 7 side of the lower round hole wheel 60, and the surface portion 67 is a rough surface. And acts as the friction engagement surface H1. In other words, the outer peripheral side region 66b of the surface 66 on the back cover 7 side of the lower round hole wheel 60 is recessed as compared with the inner peripheral side region 66a, so as to avoid interference with adjacent members. Yes.

  It should be noted that the thickness of the lower round wheel 60 in a region where the annular surface portion 67 is present is approximately the same as the height of the outer peripheral surface 59a of the second flange-shaped portion 59, and more specifically, from the height of the outer peripheral surface 59a. Is slightly larger. Therefore, the annular surface portion 67 of the lower round hole wheel 60 slightly protrudes toward the back cover 7 side from the surface 59 b of the second flange-shaped portion 59.

  An annular upper round wheel 70 is disposed on the annular surface portion 67 of the lower round wheel 60 on the outer periphery 57 a of the medium diameter cylindrical portion 57 of the male screw member 53.

  An annular upper round wheel 70 has an annular main body 71 having an annular lower end surface 72 and a cylindrical outer peripheral gear portion 73 and a non-cylindrical inner peripheral surface 74, and is provided on the inner peripheral side portion on the back cover 7 side. And a large cylindrical deep recess 75. The non-cylindrical inner peripheral surface 74 of the upper round hole wheel 70 has a shape in which the cross-sectional shape actually matches the cross-sectional shape of the non-cylindrical cylindrical portion 57 of the male screw member 53. The annular upper round hole wheel 70 is fitted to the non-cylindrical cylindrical portion 57 of the male screw member 54 at the non-cylindrical inner peripheral surface 74 so as to be rotated integrally with the male screw member 54, and is roughened. The annular lower end surface 72 forming the frictional engagement surface H2 is frictionally engaged with the annular surface portion 67 of the lower round hole wheel 60, and the outer peripheral gear portion 73 is engaged with the first round hole intermediate wheel 41 ( More specifically, it meshes with the first round hole intermediate gear 41b) of the first round hole intermediate wheel 41.

  Disc springs 80 </ b> A and 80 </ b> B as elastic members are disposed in the recess 75 of the upper round hole wheel 70. The disc springs 80A and 80B have the same shape except that the top and bottom are inverted. Each of the disc springs 80A and 80B includes main body portions 81A and 81B having a shape of a peripheral surface of the truncated cone. The disc springs 80A and 80B are in contact with each other at the small diameter end portions 82A and 82B, and the large diameter end portions 83A and 83B are They are arranged so as to be located away from each other. In this example, the lower disc spring 80A abuts the bottom surface of the recess 75 of the upper round wheel 70 at the large-diameter end portion 83A, and the upper disc spring 80B located on the opposite side is adjusted by the large-diameter end portion 83B. It is in contact with the lower end surface 92 of the female screw member 90 as a member. Accordingly, the lower round hole wheel 60 is located between the annular lower end surface 72 of the upper end round hole wheel 70 and the back cover side surface 58a of the first flange-shaped portion 58 of the male screw member 53 under the action of the elastic force of the disc springs 80A and 80B. Are sandwiched in a state of frictional engagement with each other.

  The inner diameters of the disc springs 80A and 80B are sufficiently larger than the cylindrical main body 54 of the male screw member 53, and the outer diameters of the disc springs 80A and 80B are sufficiently smaller than the inner diameter of the concave portion 75 of the upper round hole wheel 70. . Therefore, even if the disc springs 80A and 80B are deformed so that an axial compression force is applied to the disc springs 80A and 80B so that the inclination of the disc springs 80A and 80B is reduced, the inner circumferences of the disc springs 80A and 80B are reduced. There is no fear that the surface is pressed against the outer peripheral surface of the cylindrical main body 54 of the male screw member 53 or the outer peripheral surfaces of the disc springs 80A and 80B are pressed against the inner peripheral surface of the recess 75 of the upper round wheel 70.

  A female screw member 90 as an adjustment member is mounted on the disc springs 80A and 80B in the concave portion 75 of the upper round hole wheel 70.

  The female screw member 90 includes a female screw portion 91 that is screwed into the male screw portion 56 of the male screw member 53 on the inner peripheral surface, and a pressing surface portion that presses the disc spring 80 </ b> B on the lower end surface 92. The outer diameter of the outer peripheral surface 93 of the female screw member 90 is smaller than the inner diameter of the concave portion 75 so that the female screw member 90 can be loosely fitted into the concave portion 75 of the upper round wheel 70. Note that the female screw member 90 typically has an outer diameter equal to or larger than the maximum diameter portion so that the lower end surface 92 can push down the maximum diameter portion of the disc spring 80B. However, as the maximum diameter portion expands, a portion radially inward of the maximum diameter portion may be pressed.

  More specifically, as can be seen from the plan view of FIG. 2 in addition to FIG. 1, the female screw member 90 is along parallel surfaces 95 a and 95 b (represented by reference numeral 95 when the two are not distinguished or collectively referred to). In addition, along the surfaces 96a and 96b (indicated by reference numeral 96 when the two are not distinguished or collectively referred to), notches 97a and 97b are provided on the opposite side in the diameter direction (reference numeral 97 when the two are not distinguished or collectively referred to). Are formed). The surfaces 96a and 96b are flush with each other. In this case, the female screw member 90 can be easily rotated around the central axis E in the directions E1 and E2 by a tool provided with a recess at the tip that engages with the protruding portion 98 defined by the surfaces 96a and 96b. Therefore, the degree of screwing of the female screw member 90 into the male screw member 53 (the degree of screwing) can be easily adjusted, whereby the friction engagement surface H2 of the upper round hole wheel 70 by the disc springs 80A and 80B. That is, the pressing force (vertical drag) acting between the surface 72 and the friction engagement surface H1 of the lower round wheel 60, that is, the surface 67 is easily adjusted, and the friction engagement force acting between the friction engagement surfaces 72 and 67 is easily adjusted. The magnitude can be easily adjusted, and the limit value of the torque defined by the friction engagement force, that is, the threshold torque (maximum friction torque or slip torque) can be easily adjusted. In addition, in the movement 2 provided with the manually wound wheel train 1, the elastic pressing force of the elastic member 80 related to the adjustment of the magnitude of the slip torque (maximum friction torque) is realized by the disc springs 80A and 80B. Adjustments can be made reliably to change the maximum frictional force that defines the maximum frictional torque with a minimum occupied volume to a significant extent. However, the elastic member 80 may be another spring or other member instead of the disc springs 80A and 80B.

  That is, the limit of frictional engagement between the lower round hole wheel 60 and the upper round hole wheel 70, in other words, the upper limit of the torque transmitted between the lower round hole wheel 60 and the upper round hole wheel 70 can be easily set. Can be adjusted. In other words, the round hole wheel structure 8 is provided with a torque limiter, whereby the upper limit of the winding torque of the mainspring can be defined.

  Therefore, in the movement 2 provided with this manually wound wheel train 1, when the female screw member 90 as the adjusting member is turned in the E1 direction relatively, the screwing of the female screw member 90 into the male screw member 53 in the D2 direction is small. (That is, when the female screw member 90 as the adjustment member is relatively rotated in the E1 direction and is positioned relatively in the D1 direction with respect to the male screw member 53 of the female screw member 90), the disc spring as the elastic member Since the pressing in the D2 direction against 80A and 80B is small, the pressing force in the D2 direction by the disc springs 80A and 80B is small, and the friction engagement surface 72 located on the lower side of the upper round wheel 70 and the upper side of the lower round wheel 60 are Between the annular frictional engagement surface 67 and the frictional engagement surface (back cover side surface) 58b of the first flange-shaped portion 58 of the male screw member 53 and the lower frictional engagement surface (the lower round hole wheel 60) Between the bottom) 63 The pressing force is relatively small, and between the friction engagement surface 72 located on the lower side of the upper round hole wheel 70 and the annular friction engagement surface 67 on the upper side of the lower round hole wheel 60 and the male screw member 53. The upper limit F of the friction torque that can act between the friction engagement surface (back cover side surface) 58b of the first flange-shaped portion 58 and the lower friction engagement surface (bottom surface 63) of the lower round wheel 60 is compared. Small value (for example, F1).

  Therefore, when the mainspring 34 is wound up via the manually wound wheel train 1 by turning the winding stem 20 at the zeroth position P0 in the B1 direction, the lower stage of the round hole wheel structure 8 is accompanied by the progress of the winding of the mainspring 34. When the resistance due to the torque load acting between the round hole wheel 60 and the upper round wheel wheel 70 exceeds the upper limit value F1, the friction engagement surface 67 on the upper side of the lower round wheel wheel 60 and the friction between the upper round hole wheel 70 and A friction engagement surface (back cover side surface) 58b of the first flange-like portion 58 of the male screw member 53 and a lower friction engagement surface (bottom surface) 63 of the lower round wheel 60; During this time, slip occurs, and winding of the mainspring 34 with a load torque higher than that is prohibited.

  On the other hand, the female screw member 90 is screwed deeply into the male screw member 53 in the direction D2 to increase the pressing force between the disc springs 80B and 80A, and the frictional member located below the upper round hole wheel 70. Between the mating surface 72 and the upper annular friction engagement surface 67 of the lower round wheel 60 and the friction engagement surface (back cover side surface) 58b of the first flange-like portion 58 of the male screw member 53 and the lower round. When the upper limit F of the friction torque that can work between the lower friction engagement surface (bottom surface) 63 of the wheel 60 is set to a relatively large value (for example, F2 (> F1)), the 0th stage position P0 When the mainspring 34 is wound up through the manually wound wheel train 1 by turning the winding stem 20 in the B1 direction, the lower round hole wheel 60 and the upper round of the round hole wheel structure 8 as the winding of the mainspring 34 progresses. Even if the resistance caused by the torque load acting between the wheel wheel 70 reaches the value F1, the lower round wheel wheel 60 Winding is performed without slippage between the frictional engagement surface 67 and the frictional engagement surface 72 of the upper round hole wheel 70, and the lower round hole of the round hole wheel structure 8 is accompanied with the progress of the winding of the mainspring 34. The friction engagement surface 67 of the lower round hole wheel 60 and the friction engagement surface 72 of the upper round hole wheel 70 are not detected until the resistance caused by the torque load acting between the wheel 60 and the upper round hole wheel 70 exceeds the upper limit F2. And the winding of the mainspring 34 with a load torque higher than that is prohibited.

  That is, in the latter case, the mainspring 34 can be wound up to a higher torque. Further, in the movement 2 provided with the manually wound wheel train 1, the degree of winding can be adjusted by adjusting the degree of screwing of the female screw member 90.

  The elastic member 80 is preferably disc spring deformed because it has a large spring constant that can greatly change the pressing force with a small displacement in the D direction. However, if desired, instead of the disc spring, a coil spring or other spring, rubber, or the like can be used. An elastic material may be used.

  In the movement 2 provided with the above-described manually wound wheel train 1, since the torque limiter mechanism or the function or the slip torque function is incorporated in the manually wound wheel train 1 itself of the movement 2, unlike the case of the automatic winding type, Since there is no need to provide a slipping attachment in the chamber 33 of the barrel complete 30, the mainspring body 34 can occupy only the volume integral occupied by the slipping attachment. A time-stable torque output can be provided, or the operation level of the timepiece 3 can be increased by increasing the torque level. Further, in the movement 2 provided with the manually wound wheel train 1, since the torque limiter mechanism or the function or the slip torque function is incorporated in the manually wound wheel train 1 itself of the movement 2, the slip torque function is added to the crown or other exterior parts. Since it does not need to be held, it can be avoided that the crown and other exterior parts become unnaturally enlarged.

  In the case of the movement 2 including the hand-rolled wheel train 1 as described above, the distal end portion 51 of the round-hole wheel guide pin 50 of the round-hole wheel structure 8 constituting the hand-rolled wheel train 1 is press-fitted and fitted to the train wheel bridge 12. By attaching the train wheel bridge 12 to the main plate 11 in the worn state, the hand-rolled train wheel 1 is assembled into the movement 2. Accordingly, the adjustment of the slip torque F by the female screw member 90 is also performed before the round hole wheel structure 8 is fitted to the train wheel bridge 12, and since it needs to be disassembled after it is assembled once, the slip torque F This adjustment is difficult in practice.

  On the other hand, as shown in the cross-sectional view of FIG. 3, the movement includes a manually wound wheel train that can adjust the screwed state of the male screw member even after being incorporated into the main body of the movement. May be.

  In the timepiece 3K having the movement 2K having the hand-rolled wheel train 1K shown in FIG. 3, substantially the same elements as those in FIGS. 1 and 2 (members, parts, etc.) include the elements in FIGS. 1 and 2 generally correspond to the elements in FIG. 1 and FIG. 2, but some elements that are partially different are indicated by the subscript K after the elements in FIG. 1 and FIG. .

  Unlike the manually wound wheel train 1 in FIG. 1 in which the round hole wheel structure 8 is attached to the train wheel bridge 12, in the manually wound wheel train 1K in FIG. 3, the round hole wheel structure 8K is attached to the main plate 11K. ing.

  The round hole wheel structure 8K also includes a support shaft structure 50K, a lower round hole wheel 60, an upper round hole wheel 70K, an elastic member 80, and a female screw member 90K as an adjustment member. Here, the support shaft structure 50K includes a round hole wheel guide pin 51K and a male screw member 53K. In the following, an example in which the lower round hole wheel 60 is practically the same in the manually wound wheel trains 1 and 1K will be described, but the lower round hole wheel 60 may have a slightly different shape.

  The round hole car guide pin 51K is different from the round hole car guide pin 51 in that the round hole car guide pin 51K is press-fitted and fitted into the hole of the round hole car support part 11c of the main plate 11K at the tip 51bK. In general, it has a flange-like portion 51aK, a plurality of medium-diameter shaft portions 51dK and a small-diameter shaft 51eK, and the overall shape is substantially the same as that of the round hole guide pin 51. The shape of the round hole wheel guide pin 51K may be different from the shape of the round hole wheel guide pin 51.

  The male screw member 53 </ b> K has a cylindrical main body 54 </ b> K and a flange-like portion 55 </ b> K on the proximal end side in the same manner as the male screw member 51. Instead of being supported by the flange-shaped portion 51a of the pin 51, the flange-shaped portion of the round-hole vehicle guide pin 51K is supported by the round-hole vehicle support portion 11c of the main plate 11K by the first flange-shaped portion 58K of the flange-shaped portion 55K. It differs from the male screw member 53 of the round hole wheel structure 8 in that it is regulated by 51aK.

  More specifically, the male screw member 53K includes a first flange-like portion 58K having a surface 58bK on which the lower round hole wheel 60 is slidably mounted on the bottom surface 63 of the recess 62, in the same manner as the male screw member 51. The non-cylindrical shape of the upper round hole wheel 70K so as to rotate together with the second flange-shaped portion 59K having the outer peripheral surface portion 59aK to which the lower round hole wheel 60 is rotatably fitted. A non-cylindrical medium-diameter cylindrical portion 57K including a non-cylindrical outer peripheral surface portion 57aK fitted to the inner peripheral surface 74.

  In the upper round hole wheel 70K, the height of the annular main body 71K (length extending in the axial direction) and the depth of the cylindrical concave portion 75K (depth in the axial direction) are the same as the height of the annular main body 71 of the upper round hole wheel 70 and the cylinder. Except for the point that is much smaller than the depth of the concave portion 75, it is configured in substantially the same way as the upper round hole wheel 70. More specifically, as can be seen from FIG. 3, the depth of the cylindrical recess 75K of the upper round hole wheel 70K is smaller than the height of the two disc springs 80A and 80B as elastic members, and the upper portion of the upper disc spring 80B. Protrudes beyond the upper end 77 of the upper round wheel 70K.

  In this example, the female screw member 90K as the adjusting member has a diameter larger than the diameter of the concave portion 75K of the upper round hole wheel 70K, and the upper disc spring protruding from the concave portion 75K of the elastic member 80 at the lower end surface 92K. It contacts the large diameter end portion 83B of 80B. In this example, the female screw member 90K moves in the D2 direction with respect to the male screw member 53K at the threaded portion between the female screw portion 91K and the male screw portion 56K as the female screw member 90K as the adjusting member rotates in the E2 direction. Screwed in, the lower end surface 92K of the female screw member 90K pushes the large-diameter end 83B of the upper disc spring 80B of the disc springs 80B and 80A of the elastic member 80 in the D2 direction, through the disc springs 80B and 80A. , Between the friction engagement surface 72K of the upper round hole wheel 70K and the friction engagement surface 67 of the lower round wheel wheel 60, and the friction engagement surface (the back cover side surface) of the first flange-shaped portion 58K of the male screw member 53K. 58bK and the lower friction engagement surface (bottom surface) 63 of the lower round hole wheel 60 are increased in pressure so that slip occurs between the friction engagement surfaces 72K and 67 and between the friction engagement surfaces 58bK and 63. Threshold or slip torque (maximum friction) Increase the torque) F.

  In this example, the train wheel bridge 12K is provided with an opening 12c that is largely cut off at a portion of the round hole wheel structure 8K, and when the back cover 7 is removed, adjustment is made through the opening 12c. The head 99 of the female screw member 90K as a member is exposed. Therefore, by simply removing the back cover 7, the protrusions of the tool are engaged by turning them into a plurality of engaging recesses 99a (for example, equidistantly around the central axis E) of the head 99 of the female screw member 90K. By rotating together, the slip torque can be adjusted by adjusting the degree of screwing of the female screw member 90K.

  In the case of this manually wound wheel train 1K, since the height of the upper round hole wheel 70K is lower than that of the upper round wheel wheel 70 of the hand wound wheel train 1, the gear portion 73K of the upper round wheel wheel 70K is the upper round wheel. Compared to the gear portion 73 of the hole wheel 70, it is located farther from the back cover 7. Therefore, in this manually wound wheel train 1K, the axial length (thickness) of the first round hole intermediate pinion 41cK of the first round hole intermediate wheel 41K is increased, and the first round hole of the first round hole intermediate wheel 41K is increased. The intermediate gear 41bK is configured to mesh with the gear portion 73K of the upper round hole wheel 70K at a position farther from the back cover 7 than the first round hole intermediate gear 41b of the first round hole intermediate wheel 41. Accordingly, the first round hole to support the first round hole intermediate gear 41bK of the first round hole intermediate wheel 41K at a position further away from the back cover 7 than the first round hole intermediate gear 41b of the first round hole intermediate wheel 41. In this example, the barrel holder 13K includes a portion 13d shifted downward so that the lower end portion of the shaft 41aK of the intermediate wheel 41K can be pivotally supported.

  In the timepiece 3K having the movement 2K having the hand-winding wheel train 1K configured as described above, when the winding stem 20 at the 0-th position P0 is turned in the B1 direction, the handwheel 15 and the chichi wheel 18 are passed through. The round hole wheel structure 8K is rotated in the E1 direction, and the first round hole intermediate wheel 41K and the second round hole intermediate wheel 42 of the round hole intermediate wheel mechanism 9K rotate according to the rotation of the round hole wheel structure 8K. Then, when the square wheel 37 is turned, the winding of the mainspring body 34 proceeds. As the mainspring body 34 is wound up, a torque F to be transmitted between the lower round wheel 60 and the upper round wheel 70K of the round hole structure 8K when the mainspring 34 is rolled up is a female screw as an adjusting member. When the value defined by the amount of threading of the member 90K in the D2 direction is exceeded, the space between the friction engagement surface 67 of the lower round hole wheel 60 of the round hole wheel structure 8K and the friction engagement surface 72K of the upper round hole wheel 70K. Slipping occurs, and further winding of the mainspring body 34 is stopped.

  Here, the upper limit value of the torque F can be adjusted by adjusting the screwing amount of the female screw member 90K. That is, also in this timepiece 3K, the upper limit of winding of the mainspring body 34 can be set to a desired level only by adjusting the state of the manually wound wheel train 1K forming a part of the movement 2K. In particular, in the movement 2K of the timepiece 3K, since the engaging recess 99a of the female screw member 90K is exposed to the back cover 7 side in the large opening 12c of the train wheel bridge 12K, simply removing the back cover 7, The upper limit value of the winding torque of the mainspring body 34 can be adjusted to a desired level.

  In addition, as shown in FIG. 3, the round hole wheel structure 8K is supported by fitting the lower end small diameter portion 51bK of the round hole wheel guide pin 50K of the round hole wheel structure 8K into the hole of the support portion 11c of the main plate 11K. Instead, for example, as shown in FIGS. 4A and 4B, as the round hole wheel structure 8M, both ends of the shaft 51M are tenon portions 51fM and 50gM, and the tenon portion 51gM on the lower end side is the base plate 11M. The tenon portion 51fM on the upper end side may be supported by the bearing 12fM of the receiving plate 12dM that is detachably fixed to the train wheel bridge 12M. In this case, the shaft 51M corresponds to a shaft portion in which, for example, the round hole wheel guide pin 51 of FIG. 1 and the male screw member 53 in the form of a hollow support shaft portion are integrated.

  In that case, the round wheel structure 8M can be easily removed simply by removing the receiving plate 12dM fixed to the train wheel bridge 12M with the detachable fixing means 12gM such as a screw. Accordingly, as the round hole wheel structure 8M, by using the round hole wheel structure 8M having a slip torque of a given size F, the round hole wheel structure 8M is removed and the round hole wheel structure 8M is removed. The slip torque F of the structure 8M can be set to a predetermined state. That is, for example, when the round hole wheel structure 8M includes a lower round hole wheel and an upper end round hole wheel whose slip torque can be adjusted by an adjustment member such as a female screw member, the round hole wheel structure 8M is removed. The slip torque is adjusted by the adjusting member in the state, and then the tenon portion 51gM of the shaft 51M of the round hole wheel structure 8M is inserted into the bearing 11fM of the main plate 11M, and further the bearing 12fM fits into the tenon portion 51fM of the shaft 51M. The round hole wheel structure 8M having a predetermined slip torque F can be easily disposed at a predetermined position by mounting the receiving plate 12dM on the wheel train receiver 12M.

  In the round hole wheel structure 8M shown in FIGS. 4 (a) and 4 (b), elements substantially similar to the elements in FIG. 3 are given a suffix M after the reference numerals of the corresponding elements in FIGS. (In the case where a suffix K is present at the end of the element in FIG. 3, a symbol “M” is appended instead of the symbol “K”).

  The frictional engagement between the two elements providing slip torque (in the above example, the lower round wheel and the upper round wheel) is typically relative to the surface (see FIG. In the example of FIG. 1 or FIG. 3, for example, it is performed between the surface 67 and the surface 72 or 72K, and the surface 63 and the surface 58b or 58bK). However, if desired, for example, as shown in FIGS. 5 (a) and 5 (b), one member 60Q provided with the elastic arm portion 68Q or 68R having the surfaces relatively arranged in the radial direction, or It may be performed between the other member 70Q or 70R provided with 60R and the shaft 78Q or 78R. In this case, for example, the members 60Q and 60R including the elastic arm portions 68Q and 68R are respectively meshed with gears such as the gear 18a of the wheel 18 by the gear portions 65Q and 65R, and the shafts 70Q and 70R respectively correspond to the first shafts 70Q and 70R. A gear portion (not shown) such as a first round hole intermediate gear (not shown) of a round hole intermediate wheel (not shown) is engaged with a pinion portion (not shown) integral with the shafts 70Q and 70R. . In this case, the pressing force between the elastic arm portions 68Q and 68R and the shafts 78Q and 78R that are frictionally engaged in the radial direction with the pressing force defined in advance by the springs 80Q and 80R of the elastic arm portions 68Q and 68R. A dependent frictional engagement torque (slip torque) F is obtained. In this case, typically, the elastic pressing force acting between the elastic arm portions 68Q and 68R and the shafts 78Q and 78R is constant and cannot be adjusted, but if desired, an elastic force adjusting means is added. May be.

  In the members shown in FIG. 5 (a) or (b), elements similar to those in FIGS. 1 and 2 are given suffixes Q or R after the corresponding elements in FIG. 1 or FIG. 3 is suffixed with the suffix Q or R after the corresponding element in FIG. 1 or 2 (if the suffix K is at the end of the element in FIG. The symbol “Q” or “R” is attached instead of the symbol “K”).

A1, A2 Winding stem entry / exit direction B Winding stem rotation center axis B1, B2 Winding stem rotation direction D Thickness direction D1, D2 direction E Rotation center axis E1, E2 Rotation direction F, F1, F2 Slip torque (maximum friction) torque)
H1, H2 Friction engagement surface P0 Winding true 0 stage position 1, 1K Manual winding wheel train 2, 2K Movement 3, 3K Timepiece 6 Time / hand movement train wheel 6a escape wheel 7 Back cover 8, 8K, 8M Round Hole wheel structure 9, 9K Round hole intermediate wheel mechanism 11, 11K, 11M Ground plate 11c, 11cM Round hole wheel structure support 11fM (of the ground plate) Bearing 12, 12K, 12M Wheel train 12c Opening 12dM Bearing 12fM Bearing 12gM Fixing means (screws, etc.)
13, 13K barrel holder 13d (in the barrel holder) first round hole intermediate wheel support portion 15 pinion wheel 15a gear portion 16 setting 17 kanuki 18 kite wheel 18a gear portion 18b gear portion 19 dial plate 20 winding stem 21 large diameter flange shape Part 22 Large-diameter cylindrical part 23 Small-diameter part 24 Medium-diameter flange-like part 25 Medium-diameter cylindrical part 26 Square column part 27 Tip side small-diameter part 30 barrel wheel 31 barrel box body 31a inner peripheral surface 31c gear part 32 barrel box lid 33 barrel body 34 mainspring body 34a outer cover 34b inner peripheral end 35 barrel case 35a projecting end portion 36a, 36b bearing portion 37 square hole wheel 38 square hole screw 41, 41K first round hole intermediate wheel 41a, 41aK shaft 41b, 41bK first round hole intermediate gear 41c , 41cK First round hole intermediate pinion 42 Second round hole intermediate wheel 50, 50K Support shaft structure 51, 51K Round hole guide pin 51M Shaft 51a, 51aK Flange Part (flange portion)
51b, 51bK Fitting shaft portion 51d, 51dK Medium diameter shaft portion 51e, 51eK Small diameter shaft portion 51fM, 51gM Tenon portion 53, 53K Male thread member 54, 54K Cylindrical main body portion 55, 55K (base end side) flange-shaped portion 56, 56K Male threaded portions 57, 57K (front end side) Non-cylindrical cylindrical portions 57a, 57aK Outer periphery 57i, 57iK Non-circular portions 58, 58K First flange-shaped portion 58a Recessed portion 58b, 58bK Back cover side surface (friction engagement) surface)
59, 59K Second flange-shaped portions 59a, 59aK Outer peripheral surface 60 Lower round wheel 60Q, 60R One member 61 Dial-side surface portion 62 (circular or annular) concave portion 63 (concave portion) bottom surface (friction engagement surface) )
64 Cylindrical inner peripheral surface 65 (lower round hole) gear portion 65Q, 65R gear portion 66 (back cover side) surface 66a inner peripheral side region 66b outer peripheral side region 67 annular surface portion (friction engagement surface)
68Q, 68R Elastic arm portion 70, 70K Upper round hole wheel 70Q, 70R The other member 71, 71K Annular body 72, 72K Annular lower end surface (friction engagement surface)
73, 73K Cylindrical outer peripheral gear portion 74 Non-cylindrical inner peripheral surface 75, 75K Cylindrical concave portion 77 Upper end portion 78Q, 78R Shaft 80 Elastic member 80A, 80B Disc spring 80Q, 80R Spring 81A, 81B Body portion 82A, 82B Small diameter end Part 83A, 83B large diameter end 90, 90K female screw member (adjustment member)
91, 91K Female thread portion 92, 92K Lower end surface 93 Outer peripheral surface 95, 95a, 95b Surface 96, 96a, 96b Surface 97, 97a, 97b Notch portion 98 Projection portion 99 Head portion 99a Engaging recess

Claims (6)

A manually wound wheel train having a plurality of gears meshed with each other to transmit the rotation of the winding stem to the square hole wheel,
An input side member having an input side frictional engagement portion and an output side member having an output side frictional engagement portion, which face each other at each frictional engagement portion and frictionally engage with each other at the facing portion. And what
Elastic means for pressing one friction engagement portion against the other friction engagement portion ,
The input side frictional engagement portion of the input side member and the output side frictional engagement portion of the output side member face each other in the extending direction of the rotation center axis.
It has a hollow rotation support shaft part fitted with a round hole car guide pin at the center hole and provided with a small diameter male screw part on the tip side,
A lower round hole wheel is rotatably fitted to an inner diameter portion of the base end of the hollow rotary support shaft portion, and the upper round hole wheel is rotated so that the upper round hole wheel rotates integrally with the hollow rotary support shaft portion. A car is fitted to the non-cylindrical part in the middle of the hollow rotation support shaft part with a non-cylindrical hole part,
A female screw member is screwed into the distal-end male screw portion of the hollow rotation support shaft portion, and the female screw member is screwed in via the elastic means located between the female screw member and the upper round hole wheel. A manually wound wheel train configured such that axially opposed surfaces of the lower round hole wheel and the upper round hole wheel are frictionally engaged .   The hand-wound wheel train according to claim 1, wherein the female screw member has a smaller diameter than the upper round hole wheel and is located in a central recess of the upper round hole wheel.   The manually wound wheel train according to claim 1, wherein the female screw member has a diameter equal to or larger than that of the upper round hole wheel and is positioned on the upper round hole wheel.   The rotation center shaft of the lower round hole wheel and the upper round hole wheel is composed of a solid shaft portion configured to be guided by tenon receiving portions at both ends, and the upper side of the shaft portion can be removed. The hand-wound wheel train according to claim 1, guided by a receiving plate fixed to the train wheel bridge. A timepiece movement comprising the manually wound wheel train according to any one of claims 1 to 4. A timepiece comprising the timepiece movement according to claim 5.

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