JP5166010B2 - Balance structure, controlled escapement and mechanical watch equipped with the balance - Google Patents

Description

  The present invention relates to a balance structure of a mechanical timepiece, and more particularly to a balance structure, a speed control escapement including the balance structure, and a mechanical timepiece.

  In a balance structure of a mechanical timepiece, spiral springs are connected together (for example, Patent Document 1). That is, the hairspring is attached to a whisker ball that is integrally attached to the balance wheel with a spiral-shaped inner peripheral end, and a spiral-shaped outer peripheral end that is attached to the balance mounted on the balance. Installed. The balance holder supports the balance of the balance on the upper end of the balance, but does not directly support the balance or the balance wheel.

  Therefore, for the purpose of assembling a mechanical watch, etc., when trying to assemble the balance structure so that the lower end of the balance is fitted in the lower balance bearing previously arranged on the main plate, If pinched with tweezers, etc., the center side structure consisting of the balance wheel and balance wheel may hang down due to its own weight and exert an excessive stretching force on the balance spring, leaving the strain exceeding the elastic limit for the balance spring. is there.

In addition, when assembling the balance structure into the main plate, the gangue attached to the balance body of the balance is engaged between the anchor points of the ankle that forms the governor escapement in cooperation with the balance structure. It is necessary to assemble the balance with the balance structure so that it is not easy to assemble conventionally or skill is required. If time is taken for this incorporation, the possibility of residual distortion in the hairspring increases further.
JP 2006-234528 A

  The present invention has been made in view of the above-mentioned points, and the first object thereof is to avoid the possibility of the hairspring being stretched when assembled into the main plate, and the balance structure that can be easily assembled. An object of the present invention is to provide a speed escapement and a mechanical timepiece having the same.

  Another object of the present invention is to provide a balance structure that can be reliably engaged with an ankle, a speed control escapement including the balance structure, and a mechanical timepiece.

  In order to achieve the first object, the balance structure according to the present invention is attached to the balance holder at one end and is detachably engaged with the central structure comprising the balance wheel and balance at the other end. A holder having a side engaging portion, and in a state in which the holder is engaged with the central side structure, the holder is configured such that the central side structure extends to the balance with respect to the balance. The center structure is supported so as to restrict relative displacement in the direction.

  In the balance structure according to the present invention, the holder having the distal end side engaging portion which is attached to the balance on one end side and is detachably engaged with the central side structure including the balance wheel and the balance stem on the other end side. The "holding tool is relatively displaced in the true extending direction of the balance with respect to the balance with the balance being engaged with the central structure." In the state where the retainer is engaged with the center side structure, the balance is held by holding the balance with a jig or the like during assembly or repair without causing excessive distortion to the mainspring. Can move the body. That is, assembly workability can be improved. Accordingly, the balance structure can be easily and reliably incorporated into the balance bearing such as the main plate without fear of extending the hairspring. Therefore, the watch can be easily assembled and repaired. In addition, also in the case of decomposition | disassembly, since the balance structure holder can be engaged with the center side structure body and the balance with a balance can be removed, decomposition | disassembly can also be performed easily. Moreover, in the balance structure of the present invention, since the “holding tool is detachably engaged with the central structure”, the balance structure is assembled into a predetermined portion of the watch body (element body), and then the holding tool is assembled. It is possible to set the balance structure to an operable state simply by releasing the engagement between the center structure and the central structure.

  In the balance structure according to the present invention, typically, the holding tool is attached to the balance holder so as to be rotatable around a central axis parallel to the balance on the one end side.

  In that case, the holder can reliably regulate the displacement of the central structure in the direction of the true extension by simply providing a simple structure that allows rotation, and the engaged state and the disengaged state. Can be surely taken. Further, the balance structure can be allowed to operate only by moving the holder to the disengagement position. Accordingly, the holder is similarly used for repair after assembly, and the balance structure can be easily assembled. However, if desired, the holder may be completely separated or removed from the balance after the balance structure has been assembled.

In the balance with hairspring structure of the present invention, typically, the distal end side engaging portion of the holder is composed of a true stem engaging portion that can be truly engaged with the balance. In that case, engagement between the engaging portion of the holder and the central structure can be easily performed. However, the distal-side engagement portion of the holder may be adapted to be engaged with the balance wheel instead TEN true of the center-side structure.

  In the balance structure according to the present invention, typically, the balance engaging portion of the holder is located between the attaching portion of the balance wheel and the attaching portion of the swing seat in the balance. In FIG. 2, the lens is configured to be engaged truly.

  In this case, the engagement between the true engagement portion of the holder and the true retainer engagement portion can be easily performed. In addition, since there can originally be a gap between the attaching part of the balance wheel and the attaching part of the swing seat body in the balance, since this gap can be used as a holder engaging part, Great improvements can be made without making substantial changes to the shape.

  In the balance with hairspring structure of the present invention, the cross section of the balance retainer engaging portion of the balance is typically circular.

  In this case, engagement and disengagement between the holder and the true holder engaging portion can be easily performed.

  In the balance with hairspring structure of the present invention, typically, the cross section of the true holder engaging portion is non-circular. In this case, the center side structure can be held at a predetermined angle rotation position.

  In the balance with hairspring structure of the present invention, typically, the transverse section of the balance retainer engaging portion is polygonal or oval.

  In the balance structure of the present invention, typically, the orientation of the non-circular cross section of the true holder engaging portion is such that the true holder engaging portion engages with the true engaging portion of the holder. When this is done, it is defined according to the rotational position that the swing seat takes relative to the ankle.

  In that case, the rotation center side structure in which the ankle blade is set at a predetermined rotation position so that the hook point is positioned at a predetermined position that can be engaged with the rock stone, and the balance spring accumulates distortion. Is engaged with the retainer, and after the balance structure is assembled to the main plate to which the balance bearing is attached, the engagement of the balance engaging portion of the retainer and the true retainer engaging portion is released. By doing so, the center side structure is rotated in response to the release of the distortion of the hairspring, and the swing stone of the swing seat is rotated so as to be engaged with the tip of the tip of the ankle cage. As a result, it is possible to easily and reliably realize the troublesome relationship between the ankle and the pallet stone when the balance structure is assembled.

  In the balance structure of the present invention, typically, the balance engaging portion of the holder has a concave portion complementary to the half of the cross section of the balance holder engaging portion of the balance.

  The speed control escapement of the present invention typically includes a balance structure as described above.

  The mechanical timepiece of the present invention typically includes a balance structure or a speed control escapement as described above.

  In this case, it is easy to assemble and disassemble the balance structure in the mechanical timepiece.

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

  1 to 4 show a balance structure 1 according to a first preferred embodiment of the present invention, a speed control escapement 2 and a mechanical timepiece 3 having the same.

  As can be seen from FIGS. 1 to 3, the balance structure 1 includes a hairspring 10, a balance stem 20, a balance wheel 26, a balance holder 30, a hair holding structure 35, and a slow and quick needle structure 40.

  The balance stem 20 includes a large-diameter shaft portion 21 at the center and middle-diameter shaft portions 22 and 23 above and below the large-diameter shaft portion 21. A balance wheel 26 is fitted to the large-diameter shaft portion 21 of the balance stem 20, a whistle ball 24 is fitted to the upper middle-diameter shaft portion 22, and a swing seat of a swing seat 29 is placed on the lower middle-diameter shaft portion 23. A body 27 is fitted. A spiral hairspring 10 is attached to the welded portion 24 a of the whistle ball or beard receiver 24 at the inner peripheral end 11.

  The beard structure 35 includes a beard holder 36 supported by the balance holder 30, a beard 37 fitted in a hole of the beard holder 36, and a beard that fixes the beard 37 to the beard holder 36. And a holding screw 38. The hairspring 10 is attached to the welded portion 37a of the whisker 37 of the whisker structure 35 at the outer peripheral side end 12.

  The balance holder 30 has an opening portion 32 having a peripheral wall portion 31, and a whisker holder 36 and a gradual needle structure 40 are fitted to the outside of the peripheral wall portion 31. A bearing 33 is fitted. The balance upper bearing 33 includes, for example, a balance upper outer frame 33a, a balance movable hole stone frame 33b, a balance top hole stone 33c, a balance top receiving stone 33d, and a balance top receiving stone holding spring 33e. In the operating state, the balance stem 20 is rotatably inserted into the hole of the balance upper hole stone 33c of the balance upper bearing 33 at the tenon portion 20a at the upper end. The balance holder 30 further includes a circular hole 30a.

  The slow / fast needle structure 40 has a slow / fast needle main body 42 having a beard bar 41 and a slow / fast needle tail 43. The fine movement lever 44 that engages with the slow and rapid needle tail 43 is fitted in the hole 34 of the balance holder 30.

  The swing seat body 27 integrally includes a tubular portion 27a fitted to the lower middle diameter shaft portion 23 of the balance stem 20 and a flange-shaped portion 27b extending radially outward from the upper end of the tubular portion 27a. Prepare. A swing stone 28 is attached to an eccentric position of the flange-like portion 27 b of the swing seat body 27.

  A holder engaging portion 50 is formed between the large diameter portion 25 to which the balance wheel 26 is attached and the lower middle diameter shaft portion 23 to which the swing seat body 27 is attached. In this example, the holder engaging portion 50 is an annular portion having a circular cross section.

  In the meantime, between the large-diameter portion 25 in which the balance wheel 26 is fitted and the lower middle-diameter shaft portion 23 in which the swing seat body 27 is fitted, There is a large diameter part with an intermediate thickness. Therefore, here, this large diameter portion is used as the holder engaging portion 50. However, if desired, a balance with a different length and shape from the conventional one may be used in order to obtain the desired axial length, diameter and cross-sectional shape.

  The balance with hairspring structure 1 further includes a holder or a holding component 60. The holder 60 includes a columnar shaft portion 61, an arm portion 62 that extends in a radial direction within a plane perpendicular to the shaft portion 61, and a stem engagement portion 63 at the tip of the arm portion 62. Have. The shaft portion 61 of the holder 60 is fitted in the circular hole portion 30a of the balance holder 30 so as to be rotatable around the central axis A in the A1 and A2 directions. The shaft portion 61 may be integrated with the balance holder 30, and the arm portion 62 of the holder 60 may be fitted to the shaft portion 61 so as to be rotatable in the A1 and A2 directions at the base end portion.

  The stem engagement portion 63 has a U-shape, and can be engaged with the holder engagement portion 50 of the balance stem 20 through a concave portion 64 of “U”. More specifically, the concave portion 64 includes a semicircular bottom wall portion 64a complementary to a half circle (semicircle) in the cross section of the holder engaging portion 50 of the balance stem 20, and a half portion of the bottom wall portion 64a. Planar side wall portions 64b and 64b having the same spacing as the diameter of the circle.

  An engagement groove 65 is formed on the upper end surface of the shaft portion 61 of the holder 60. Therefore, by engaging a driver or the like in the engagement groove 65 and rotating the shaft portion 61 in the A1 and A2 directions, the arm portion 62 of the holder 60 is rotated in the A1 and A2 directions, and the tip thereof. The spring true engagement portion 63 is engaged with the retainer engagement portion 50 of the balance stem 20 at the engagement holding position P1 (for example, FIG. 1) and is in the engagement holding state S1 (for example, FIG. 1). Or the disengagement position P2 (for example, FIG. 2), the disengagement is released and the disengagement state S2 (for example, FIG. 2) is established. When the holder 60 is in the disengagement position P <b> 2, the reciprocating rotation operation around the central axis C of the central structure 5 is not hindered.

  As shown in FIG. 2, the retainer 60 is rotated in the A2 direction, and the engagement between the winding stem engaging portion 63 at the tip of the retainer 60 and the retainer engaging portion 50 of the balance stem 20 is released. When the holder 60 is in the engagement position P2 so as to be in the disengaged state S2, in the state where the balance holder 30 is held, the central structure 5 including the balance stem 20 and the balance wheel 26 is suspended in the B1 direction. Since it falls, there exists a possibility that the hairspring 10 may be extended by this drooping.

  However, as shown in FIG. 1, the holder 60 is rotated in the direction A <b> 1, and the holder engagement portion 50 of the core 20 is fitted in the recess 64 of the winding stem engagement portion 63 at the tip of the holder 60. When the holding tool 60 takes the engagement position P1 so that the holding tool engaging part 50 is engaged with the winding stem engaging part 63, the center side structure including the balance stem 20 and the balance wheel 26 is obtained. Since the body 5 is supported by the holder 60, the central structure 5 can be prevented from hanging in the B1 direction with respect to the balance holder 30, and the hairspring 10 can be prevented from extending due to the hanging.

  A watch body into which the balance structure 1 is to be incorporated has a structure as shown in the lower part of FIG. That is, in the lower part of FIG. 3, the speed control escapement element body 2a of the watch body body 4a in a state before the balance structure 1 is assembled is shown, and the balance structure 1 is the speed control escapement element body. The speed control escapement 2 incorporated in 2a and the timepiece main body 4 including the speed control escapement 2 have the structure shown in FIG.

  As can be seen from the lower part of FIG. 3, the watch body 4 a includes a main plate 7, a third receiver 8, and an ankle receiver 9. The main plate 7 supports the lower balance tenon support 72b that supports the lower balance bearing mounting portion 7a to which the lower balance bearing 39 is attached, and the lower tenon portion 72a of the ankle stem 72 of the ankle 71 constituting the escapement 70. The mortise bearing support portion 7b and the gangue lower bearing mounting portion to which the gangue lower bearing 74b that supports the lower tenon portion 74a of the gantry truer 74 of the escape wheel 73 constituting the escapement 70 is attached. 7c. On the other hand, the third receiver 8 is provided with an upper hook mounting portion 8a to which an upper hook bearing 74d that supports the upper tenon portion 74c of the upper hook 74 of the escape wheel 73 is mounted. In addition, the ankle receiver 9 includes a tenon receiving support portion 9 a that supports the upper tenon receiver 72 d of the ankle true 72 of the ankle 71 that supports the upper tenon 72 d of the ankle true 72.

  The ankle 71 that can be engaged with the escape gear 73a of the escape wheel 73 with an input claw and an output claw that are not shown in the figure, the lever tips 75 and 75 that can hold the swing stone 28 and the sword tip 76 of the ankle lever 77 Prepare for the tip.

  Here, the pallet fork 71 can be rotated in the directions D1 and D2 around the rotation (rotation) central axis D along the pallet fork 72, and the escape wheel 73 is aligned with the gantry fork 74. A rotation (rotation) center axis E can be rotated in the directions E1 and E2.

  In the balance structure 1 configured as described above, as described above, the central structure including the balance stem 20 and the balance wheel 26 so that relative displacement in the B1 and B2 directions with respect to the balance 30 is actually prohibited or restricted. Since the body 5 is supported by the holder 60, if the balance holder 30 is lifted by holding the balance holder 30, the central structure 5 is actually lifted up integrally with the balance holder 30. Therefore, there is a possibility that a force in the B1 and B2 directions is applied to the hairspring 10 when the balance structure 1 is brought close to the speed control escapement element body 2a of the watch body 4a with the balance 30. Absent. Therefore, with the balance holder 30, the holes 30b, 30c of the balance holder 30 are fitted into the corresponding protrusions 7d, 7e of the main plate 7, and the tenon portion 20b below the balance 20 is adjusted to the watch body 4a. The balance structure 1 (more in detail) so that it fits into the mortise 39a of the balance lower bearing 39 of the quick escapement element body 2a, and so that the oscillating stone 28 is engaged between the lever tips 75, 75 of the ankle 71. The element body 1a) is relatively displaced mainly in the B1 direction and attached to the speed governor escapement element body 2a of the timepiece body element body 4a.

  When this attachment is completed, as shown in FIG. 4, the timepiece body 4 having the balance with the balance structure 1 and the speed control escapement 2 is completed.

  Here, in the balance structure 1 (more specifically, the balance structure body 1 a), the B1 and B2 direction relatives between the center side structure 5 including the balance wheel 26 and the balance stem 20 and the balance holder 30. Since the displacement is prohibited or regulated by the holder 60, the balance structure 1 (more specifically, the balance structure body 1a) can be removed from the watch main body without fear of excessive tensile stress being applied to the hairspring 10. The governor 4a can be attached to the governor escapement element 2a close to a predetermined part of the governor escapement element 2a. Therefore, the incorporation can be performed easily and reliably.

  That is, in the balance with hairspring structure 1, since the central structure 5 is held immovably in the B1 and B2 directions with respect to the balance holder 30 by the holder 60, the balance holder 30 is held with tweezers or other holding tools. By simply displacing, the balance spring 10 that connects the center side structure 5 and the center side structure 5 to the balance structure 35 attached to the balance holder 30 is also held and displaced integrally with the balance holder 30. The balance structure 1 can be arranged at a predetermined arrangement position without holding parts other than the balance holder 30 in the balance structure 1. That is, in the balance with hairspring structure 1 as described above, not only is there no possibility of applying excessive tension to the hairspring 10, but, for example, there is no need to hold the balance wheel 26, so the shape is set to a high degree. There is no possibility that the balance wheel 26 is deformed, and there is no possibility that a finger or the like touches the balance wheel 26 to contaminate the balance wheel 26 to change the weight balance.

  Further, in the balance with hairspring structure 1, the center-side structure 5 hangs on the balance wheel 30 via the hairspring 10 in the state S <b> 1 in which the holder 60 is in the holding position P <b> 1 and holds the center structure 5. Therefore, it is possible to move the balance wheel 30 in a desired direction at a high speed or to accelerate the balance spring. Further, in the state S1 of the balance structure 1, unlike the conventional case, the balance spring 10 is not stretched by the weight of the center side structure 5, and conversely, the tenon portion of the balance stem 20 is connected to the balance lower bearing. By slowly moving the balance structure 1 to be inserted into the predetermined mortise 39, there is no possibility that distortion will remain in the hairspring 10 even if the holding time of the balance holder 30 is increased.

  In actual assembly, the rotation of the pallet rocker 29 of the swing seat 29 about the central axis D of the pallet rod 77 so that the swing stone 28 of the swing seat 29 can be just engaged with the lever tips 75, 75 of the pallet fork 71. The lower tenon part of the balance 20 of the balance structure 1 is attached to the main plate 7 of the watch main body 4a by adapting the moving state and the rotating state of the central structure 5 around the central axis C. Assembling is performed by inserting into the hole 39a of the balance bearing 39.

  When the balance structure 1 is assembled into the speed-control escapement element body 2a of the watch body element 4a as shown in FIG. 4, a tool such as a minus driver is applied to the groove 65 on the end face of the shaft 61. By rotating the shaft part 61 in the A2 direction, the stem engaging part 63 at the tip of the arm part 62 of the holder 60 is removed from the holder engaging part 50 of the stem 20 of the central structure 5 and held. The arm portion 62 of the tool 60 is moved to the disengagement position P2 as shown in FIG. Note that the disengagement position P2 of the arm portion 62 of the holder 60 is such that the arm portion 62 does not hinder the reciprocating rotational movement of the central structure 5 and does not obstruct the operation or attachment / detachment of other timepiece parts. In addition, any position may be used as long as it does not occupy excessive space.

  The holder 60 can be used not only to temporarily fix the central structure 5 to the balance 30 when the balance structure 1 is first assembled into the watch body 3a, but also to a mechanical type. It can also be used in the same manner when the watch is disassembled and repaired. That is, the assembly at the time of disassembly / repair is almost the same as that at the time of the first assembly, so that repetition is avoided, and the holder 60 is moved from the disengagement position P2 to the engagement position P1 during disassembly. The balance structure 1 may be temporarily fixed to the balance 30 and the balance structure 1 may be removed from the speed control escapement element 2a of the timepiece body 4a.

  In the balance with hairspring structure 1 as described above, the possibility of causing residual distortion in the balance spring is much lower than that in the conventional balance structure, and further, the possibility of elongation of the balance spring during the incorporation is considered. Although it is as described above that the workability of assembling the balance structure 1 is improved because it is not necessary, the balance structure 1 also has the center axis C of the center side structure 5 of the balance structure 1. Since the rotational position around is not defined, it is not always easy to arrange the balance structure 1 so that the swing stone of the balance structure of the balance structure can be engaged with the ankle.

  For example, it is assumed that the balance 60 is moved to the disengagement position P2 from the engagement position P1 and the state shown in FIG. Assume that the hairspring 10 is in an elastically deformed state so that the swing stone 28 of the swing seat 27 rotates in the direction C1 from the position Ck shown in FIG. On the other hand, for example, as shown in FIG. 7, the ankle rod 77 of the ankle 71 swings in the direction D1 and is in contact with the concave portion 9c of the ankle receiver 9 at the outer surface 75a of the lever tip 75. To do. In this case, the oscillating stone 28 of the swing seat 27 does not engage well with the tips 75 and 75 at the tip of the ankle cage 77 of the ankle 71. That is, in the balance structure 1, the rotation position (rotation position or phase) in the C1 and C2 directions of the rock stone 28 of the swinging seat 27 of the balance structure 1 is not determined. It is not possible to determine where the rotational position in the D2 direction should be set. At this point, trial and error at the time of installation remains, and there is a possibility that unexpected distortion is caused to the hairspring 10 at the time of this trial and error.

  Next, in order to avoid the possibility of the occurrence of the above-described problems, examples in which the shape is further improved so that the shapes of the retainer and the stem that are engaged with each other are made different are shown in FIGS. 6 and FIG. The balance structure 1A of the modified example shown in FIGS. 5 to 8 described below and the speed control escapement 2A provided with the balance structure 1A are provided with the balance structure 1 shown in FIGS. Parts, portions, and elements that are the same as those of the governor escapement 2 are denoted by the same reference numerals, and parts, portions, and elements that are partially different are shown in FIGS. The code “A” is added after the code used.

  In the balance structure 1A of this modification, the holder engaging portion 50A of the balance stem 20A has a non-circular shape instead of a circular cross-sectional shape. More specifically, in this example, the holder engaging portion 50A of the balance stem 20A is dropped along two parallel planes 51 and 52 that are opposed to each other in the diameter direction of the circle, so that the circular arc-shaped portions 53 and 54 of the circle are formed. The remaining overall has an oval shape F.

  Further, in the balance structure 1A of this modification, the balance stem engaging portion 63A of the holder 60A that engages the holder engagement portion 50A of the balance stem 20A is crossed by the holder engagement portion 50A of the balance stem 20A. It has a shape substantially complementary to the portions 51, 52 and 53 or 54 other than one arcuate portion 54 or 53 of the surface. More specifically, the concave portion 64A of the stem engagement portion 63A of the holder 60A has parallel side wall portions 64bA and 64bA in addition to the arc-shaped bottom wall portion 64aA. The distance between the side wall portions 64bA and 64bA is substantially the same as the thickness between the parallel planes 51 and 52 of the holder engaging portion 50A of the balance stem 20A, and strictly speaking, is slightly larger than the thickness. That is, the side wall portions 64bA and 64bA of the holder engaging portion 50A of the balance stem 20A are the same as the side wall portions 64b and 64b of the holder engaging portion 50 of the balance stem 20 in that they are formed of planes parallel to each other. The thickness between the side wall portions 64bA and 64bA is smaller than the thickness between the side wall portions 64b and 64b (size that substantially matches the diameter of the holder engaging portion 50 having a circular cross section). The length of the arc of the bottom wall portion 64aA in the recess 64A of the stem engagement portion 63A of the holder 60A is the recess of the stem engagement portion 63 of the holder 60 of the embodiment shown in FIGS. 64, which is shorter than the length of the arc of the bottom wall 64a. The bottom wall portion 64aA is typically an arc, but may instead be an arbitrary concave curve (curved surface), and may be linear (planar) or into the recess depending on the case. It may be a protruding convex curve (curved surface). In that case, the concave portion 64A has the same thickness as the engaging portion 50A of the balance stem 20A, and engages with the planar side surfaces 51 and 52 of the engaging portion 50A at the flat portions 64bA and 64bA.

  Accordingly, the holder 60A is provided with the holder engaging portion 50A of the balance stem 20A only when the center-side structure 5A including the balance wheel 26 and the balance stem 20A is at a specific rotation position (rotation position) Cf. Engageable. At this rotational position Cf, strain is accumulated in the hairspring 10 and when the engagement of the spring engaging portion 63A of the holder 60A with the holder engaging portion 50A of the spring 20A is released, the balance wheel 26 is restored. The central structure 5A composed of the balance stem 20A is reciprocally rotated in the C1 and C2 directions around the rotation center axis C.

  As long as the center-side structure 5A can be engaged with the holder-engaging portion 50A of the balance 20A of the center-side structure 5A only when the center-side structure 5A is at a specific rotation position Cf, the holder 60A The shape and structure of the recessed portion 64A of the engaging portion 63A and the shape and structure of the holder engaging portion 50A of the balance 20A of the central structure 5A may be any other.

  When the central structure 5A is at the specific rotation position Cf, as shown in FIG. 8, the oscillating stone 28 is at a rotation position away from the lever tips 75 and 75 of the ankle 71. Here, the rotation position Cf is, at a minimum, a rotation position that gives deformation to the hairspring 10 in a direction in which the hairspring 10 is wound up to a certain degree, or a rotation that gives a deformation in the direction to rewind more than a certain degree. Any position that defines whether the position is a moving position may be used.

  In the variation of the balance structure 1A, the balance stem 20A has the holder engaging portion 50A having the non-circular cross section as described above, and the balance engaging portion 63A of the holder 60A is engaged with the holder. Except for having a shape that just engages the portion 50A, the balance with the balance with hairspring structure 1 has the same shape and structure.

  In the speed control escapement 2, the ankle rod 77 of the ankle 71 is between the rotational positions at which the outer side surfaces 75 a and 75 b of the lever tips 75 and 75 abut against the side surfaces 9 c and 9 d facing the ankle receiver 9 alternately. In the recess 9e defined by the side surfaces 9c and 9d, it can be rotated in the directions D1 and D2. In FIG. 8, 78 is an input claw and 79 is an output claw.

  The balance structure 1A is assembled in the mechanical timepiece 3A configured as described above as follows.

  First, the center-side structure 5A composed of the balance wheel 26 and the balance stem 20A is rotated in the vicinity of a predetermined rotation position, and the arm portion 62 of the holder 60A is rotated in the A1 direction to the position P1A. The circular stem engaging portion 63A is engaged with the non-circular holder engaging portion 50A of the central structure 5A. In this engagement state S1A, the holder 60A is moved relative to the balance holder 30 in the B1 and B2 directions by the engagement between the non-circular engagement portions 63A and 50A, and C1. , Both relative rotation in the C2 direction is restricted or practically prohibited.

  Therefore, when the balance holder 30 of the balance structure 1A is held and lifted, the center side structure 5A is actually integrated with the balance holder 30 in both the B1, B2 direction and the C1, C2 direction. There is no possibility that the hairspring 10 is moved and the balance spring 10 is extended.

  Here, even when the balance holder 30 holds and lifts the balance holder 30, even if the lifting jig of the automatic assembly machine holds and lifts the balance holder 30, a person performs assembly and operates the tweezers and other holding and lifting tools. Even when the holder 30 is held and lifted, there is practically no difference and substantially the same.

  The balance structure 1A held and lifted by the balance holder 30 has the lower tenon portion of the balance stem 20A inserted into the hole of the counter balance bearing 39 of the balance main body 39 of the watch body 4a on the main plate 7 side. By attaching 30 to the main plate 7 with a retaining hole, the balance with hairspring structure 1A is attached to the watch body 4a.

  Here, when the balance stem 20A is assembled to the balance bearing 39, the balance stem 20A is at the predetermined rotation position Cf as shown in FIG. 8, and the gangue 28 of the swing seat 29 is the ankle of the ankle 71. Since it is located away from the tips 75 of the tip of 77, the balance structure about the center axis C is in a predetermined orientation suitable for the attachment of the balance holder 30 to the main plate 7. As long as 1A is assembled to the balance with the balance with hairspring 39, there is no possibility of interference such as the swing seat 29 attached to the balance stem 20A actually contacting or colliding with the ankle 71.

  In this example, as shown in FIG. 8, the balance spring 10 from the balance wheel 20 and the balance wheel 26 with respect to the neutral position where elastic strain does not remain so that the balance spring 10 stores the repulsive spring force in the C2 direction. It is assumed that the rotation position P1A and the state S1A obtained by rotating the central side structure 5A in the C1 direction are the holding position and the holding state, respectively.

  In this case, as shown in FIG. 8, the ankle 71 is a swing stone of the swing seat 29 when the center side structure 5 </ b> A rotates in the C2 direction among the inner surfaces 75 a and 75 b of the recess 9 e of the ankle receiver 9 that functions as a dead pin. 28 is set to the rotation position G1 where the one side 75a of the corresponding lever 75 is engaged with the inner surface 75a on the side that first comes close to. The positioning of the ankle 71 at the rotational position G1 may be performed before or after the balance structure 1A is assembled into the watch body 4A.

  In this state, the tip of a tool or jig such as a screwdriver is engaged with the groove 65 at one end of the shaft 61 of the holder 60A, and the arm portion 62 of the holder 60A is rotated in the A1 direction for holding. The engagement between the spring engaging portion 63A of the tool 60A and the holder engaging portion 50A of the spring 20A is released. The rotation of the shaft 61 in the A1 direction may be performed by a control operation of a machine such as an automatic assembly machine or may be performed by a human operation.

  When the holder 60A is displaced from the holding position P1A to the non-holding position P2A in the A2 direction, the rotation restriction with respect to the center side structure 5A is released, so that the center side structure 5A responds to the spring force of the hairspring 10. And rotated around the central axis C in the direction C2.

  Therefore, the swing stone 28 of the swing seat 29 attached to the balance 20A of the center side structure 5A is engaged between the tips 75 and 75 at the tip of the pole 77 of the anchor 71 waiting at the rotation position G1. Then, the ankle 71 is rotated in the direction D2.

  That is, in the balance with hairspring structure 1A, the center side structure 5A is held by the holding tool 60A in a state of being rotated by a predetermined angle. Therefore, it is only necessary to set the ankle 71 at the predetermined rotation position G1. The spring force of the mainspring 10 can inevitably cause engagement between the swing stone 28 of the swing seat 29 and the lever tips 75 and 75 at the tip of the cage 77 of the ankle 71.

  That is, in this balance structure 1A, in the holding state S1A, the center-side structure 5A is attached to the balance holder 30 at a predetermined rotational position, and therefore, to the balance lower bearing 39 of the lower tenon portion of the balance stem 20A. As a result, it is possible to automatically automatically achieve the engagement between the swing stone 28 of the swing seat 29 and the hook tips 75 of the ankle 71, which is necessary when assembling the whiskers. It is possible to minimize the possibility of damage such as the mainspring 10 being stretched and the balance wheel 26 being soiled or distorted.

  In the above, although it was explained as if it was an initial assembly, naturally, the above explanation is also practical even when the watch 3 is at least partially disassembled and then assembled at the time of repair or the like. The same applies as it is.

  On the contrary, when the balance structure 1 or the balance structure 1A is removed from the watch body 4a, first, the tool is engaged with the groove 65 of the holders 60, 60A to move the holders 60, 60A in the A1 direction. By rotating, the balance engaging portions 63, 63A of the holders 60, 60A are engaged with the holder engaging portions 50, 50A of the corresponding central structures 5, 5A, and then the balance holder 30 is moved. What is necessary is just to remove the lower tenon part of the balance stems 20 and 20A of the center side structures 5 and 5A from the balance with lower balance 39 while removing from the main plate 7.

  Here, the engagement between the engaging portions 63 and 50 having a circular cross section is achieved only by rotating the arm portion 62 of the holder 60 in the A1 direction. On the other hand, when engaging between the engaging portions 63A and 50A having a non-circular cross section, the arm portion 62 of the holder 60A is rotated in the A1 direction until the engaging portion 63A reaches the vicinity of the position P1A. This is realized by rotating the central structure 5A around the central axis C so as to match the direction of the concave portion 64A of the engaging portion 63A. Note that the opening of the recess 64A is widened, and after the engaging portion 50A of the stem 20A is engaged at the tip of the opening of the recessed portion 64A of the engaging portion 63A, the arm portion 62 of the holder 60A is moved to A1. By rotating in the direction, the engaging portion 50A of the center side structure 5A is rotated around the central axis C by being guided by the opening side edge of the recessed portion 64A of the engaging portion 63A of the holder 60A. Thus, the engagement between the engaging portions 63A and 50A having a non-circular cross section may be achieved.

Explanatory drawing of the bottom face (lower surface) of the balance structure of one preferable Example of this invention in the holding | maintenance state. The bottom explanatory drawing similar to FIG. 1 about the case where the balance structure of FIG. 1 exists in a non-holding state (engagement release state). Cross-sectional explanatory drawing which showed the state just before incorporating the balance structure of FIG. 1 in a watch main body body. Sectional explanatory drawing similar to FIG. 3 about the timepiece main body formed by incorporating the balance structure of FIG. 1 into the timepiece main body. Plane explanatory drawing similar to FIG. 1 about the balance structure of a modification. FIG. 6 is an explanatory plan view similar to FIG. 2 when the balance structure of FIG. 5 is in a non-holding state (engaged state). Plane explanatory drawing in the case where the swing stone of the swing seat and the ankle are in a shifted relative position. Unlike FIG. 7, the plane explanatory drawing which showed the holding position of the rock stone by the holder of FIG. 5 so that an ankle and a rock rock predetermined relative positional relationship may be taken.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Balance structure 1a Balance structure body 2,2A Control escapement 2a Control escapement element 3,3A Mechanical timepiece 4 Timepiece main body 4a Timepiece main body 5,5A Center side structure 7 Ground plate 7a Balance lower bearing mounting portion 7b Tenon receiving support portion 7c Overhanging bearing mounting portion 8 Third receiving portion 8a Overhanging bearing mounting portion 9 Ankle receiver 9a Tenon receiving support portion 10 Hairspring 11 Inner peripheral side end 12 Outer end 20, 20 A Balance stem 21 Large diameter shaft portion 22, 23 Medium diameter shaft portion 24 Whistle receiver 24 a Welded portion 26 Balance wheel 27 Swing seat 27 a Tubular portion 27 b Flange-shaped portion 28 Rolling stone 29 Swing seat 30 Balance Receptor 30a Circular hole 31 Peripheral wall portion 32 Opening portion 33 Upper balance of balance 33a Upper balance frame 33b Balance wheel frame 33c Upper balance stone 33d Upper support stone 33e Upper support stone retaining spring 34 Hole 35 Beard structure Body 36 Beard holder 37 Beard 38 Beard receiving screw 39 Balance bearing 39a Mortise hole 40 Slow and quick needle structure 41 Whistle bar 42 Slow and quick needle body 43 Slow and quick needle tail 44 Fine lever 50 and 50A Holder engagement parts 51 and 52 Plane 53, 54 Arc-shaped portion 60, 60A Holder (Holding part)
61 Cylindrical shaft portion 62 Arm portion 63, 63A Truss engagement portion 64, 64A Recess 64a Bottom wall portion 64aA Bottom wall portion 64b Planar side wall portion 64bA Planar side wall portion 65 Engaging groove 70 Escapement 71 Ankle 72 Ankle True 72a Lower tenon 72b Lower tenon 72c Upper tenon 72d Ankle upper tenon receiver 73 escape wheel 74 escape wheel 74a lower tenon 74b escape lower bearing 74c upper tenon portion 74d Straight bearing 75 Hako tip 76 Sword tip 77 Uncle cage 78 Insert claw 79 Out claw A, C, D, E Center axis A1, A2, C1, C2, D1, D2, E1, E2 Rotation direction B1, B2 direction Cf Rotation position F Oval shape P1, P1A Engagement (holding) position P2, P2A Engagement (holding) release position S1, S1A Engagement (holding) state S2, S2A Engagement (holding) release state

Claims (11)

A holding tool having a distal end side engaging portion which is attached to the balance on one end side and is detachably engaged with a center side structure composed of a balance wheel and a balance stem on the other end side;
In a state in which the retainer is engaged with the center-side structure, the retainer regulates the center side structure being displaced relative to said balance staff in the extending direction with respect to the balance bridge as such, the balance structure for supporting the center-side structure. Said retainer, balance structure as claimed in claim 1 which is attached to the rotatable the balance cock around the balance staff and parallel to the central axis at said one end. The distal-side engaging portion, the balance structure as claimed in claim 2 consisting of the heaven truly engageable Naten true engagement portion of the retainer. The balance staff engagement portion of the retainer, the retainer engaging portion located between the attachment portion of the mounting portion and the swing seat of the balance staff of the balance wheel, the heaven engaged truly engaged The balance with hairspring structure according to claim 3, which is configured as described above. The balance structure according to claim 4, wherein a cross section of the retainer engaging portion of the balance is circular. The balance structure according to claim 4, wherein a cross section of the retainer engaging portion of the balance is non-circular. The balance structure according to claim 6, wherein a cross section of the retainer engaging portion of the balance is a polygonal shape or an oval shape. Orientation of the non-circular cross-section of the balance staff of the retainer engaging portion, when the balance staff of the holder engagement portion is engaged with the balance staff engagement portion of the retainer, the swing seat The balance with hairspring structure according to claim 6 or 7, wherein the balance is defined in accordance with a rotational position relative to the ankle. The balance staff engagement portion of the retainer is set forth in any one of claims 3 to 8 having a recess complementary shape to the half of the cross section of the balance staff of the retainer engaging portion The balance structure. A speed control escapement comprising the balance structure according to any one of claims 1 to 9. A mechanical timepiece comprising the governing escapement according to claim 10.

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