JP2006300332A - Fastening ring assembling device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening ring assembling device capable of easily assembling and disassembling a fastening ring, and its method. <P>SOLUTION: The fastening ring has a pair of ring ends 11, 12 spaced from each other; a region B having a constant cross section over at least 150° of its circumference; recesses 13, 14 opening to the inner peripheral surface side in the regions of the respective ring ends 11, 12; and recesses 17, 18 opening to the outer peripheral surface side adjacently to the respective terminal ends of the region B having the constant cross section. The fastening ring is in circular shape when resting, and it is tightened while substantially maintaining its circular shape when the pair of ring ends 11, 12 are brought close to each other. The fastening ring assembling device comprises a fastening ring receiving part 30 for applying pressure to the pair of ring ends 11, 12 to some extent, and a plurality of projecting parts 33, 34 projected from the receiving part 30 and engaged with the recesses 17, 18 opening to the outer peripheral surface side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anchoring ring.

  With such a fixing ring, for example, the stepped shaft can be fixed in the axial direction in the hole. For this reason, a wire retaining ring is known in the prior art (for example, Patent Document 1). A shaft retaining ring for a shaft or hole is formed by sliding or pushing the upper surface in the axial direction in a tension state compressed or expanded radially in the receiving groove of the shaft or hole. Assembly is possible. With such a wire retaining ring, the machine part can be fixed and held in the axial direction in a state where it is relaxed in the radial direction and protrudes into the locking groove of the machine part. For this purpose, the ends of these wire retaining rings are bent about 10% of the ring length inwardly in the case of shafts or outwardly in the case of holes, and these ends substantially It is supported by the groove bottom while being held coaxially with the receiving groove.

  Further, for example, a known retaining ring according to Patent Document 2 is made of a spring wire and has an end bent inward. Such a retaining ring is fitted into the groove of the retaining disk by sliding it in an open state so that the bent end is in the axial notch of the retaining disk. The structural unit pre-assembled in this way from the retaining disk and retaining ring is pushed into the cylindrical housing for assembly and the retaining disk is moved during the pushing operation by the clamping tool acting on the bent end. The retaining ring is tightened in the radial direction to such an extent that it cannot be completely seen in the groove. After positioning this preassembled structural unit in the axial direction, the retaining ring is reopened in the radial direction, partly in the groove of the retaining disc and partly in the peripheral groove of the cylindrical housing. In this way, the stop disk is fixed in the axial direction as desired.

  A detachable joint of two housing parts is described, for example, in US Pat. No. 6,057,086, in which the outer peripheral surface of a cylindrical extension of one housing part has an annular groove and the extension of the other housing part. The wall of the cylindrical recess that receives the ring has an annular groove that follows this first annular groove in the radial direction. The oval annulus in both annular grooves is circular when in the removed position and its diameter is between the diameters of the bottoms of both annular grooves. When in the mounting position, the annular body is pressed into an oval shape by two screws that are offset from each other by 180 °, and the wall of the recess has an expanded diameter at the outer end that surrounds the extension with a wide play. This detachable joint can certainly absorb relatively large axial forces. However, this joint is relatively expensive in terms of manufacture, since the threads for both clamping screws must be produced and the clamping screws must be screwed into these threads.

  When strict conditions are required for absorption of axial force and ease of assembly, shaft retaining rings punched from thin plates are used, and these shaft retaining rings have a hole for receiving a tightening tool at the end. Have.

German Patent Invention No. 2620142 German Patent Application Publication No. 363,520 German Patent Application Publication No. 1251091

  Such a shaft retaining ring typically has a cross section that varies along the circumferential surface of the shaft retaining ring. In the terminal region, the cross section is almost the same size as the central region. As a result, such retaining rings are oval when compressed. Thus, these rings cannot be used in extremely tight installation situations.

  In addition, when such a shaft retaining ring has to be assembled or disassembled in a narrow gap between the stepped shaft and the cylindrical hole, the normal pliers can easily slide out of the shaft retaining ring hole. , Difficulties arise. In addition, the same can be said for a shaft retaining ring made of a wire having a bent ring end. The shaft retaining ring is often inserted several centimeters deep into the annular gap between the stepped shaft and the cylindrical hole. This makes it very difficult to handle. Finally, shaft retaining rings that are locked in circumferential grooves are often such that holes for receiving tools or rings formed at the bent ends are partially covered by the sides of the annular groove. It is locked deep inside the circumferential groove of the hole. As a result, the tool cannot grip the retaining ring for the shaft or is very difficult to grip.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fixing ring assembling apparatus and method that enable simple assembly and disassembly of the fixing ring.

  The present invention is an apparatus for assembling a fixing ring having an inner peripheral surface and an outer peripheral surface, the fixing ring comprising a pair of ring ends (11, 12) spaced apart from each other and at least a peripheral surface having a constant cross section. A region (B) extending over 150 degrees on the surface, a recess (13, 14) opening on the inner peripheral surface side in the region of each ring end (11, 12), and a region (B) having a certain cross section A concave portion (17, 18) that is open to the outer peripheral surface side adjacent to each terminal portion, and is circular when the fixing ring is stationary, and the pair of ring ends (11, 12) are connected to each other When it comes close, it tightens while substantially maintaining its circular shape, and a receiving means (30) for the fixing ring that presses the pair of ring ends (11, 12) to some extent, and a protrusion from this receiving means (30) And a concave portion (17 18) and engaging a plurality of projections and a (33, 34).

As mentioned above, the stationary ring, which is substantially circular when stationary, has two ring ends that are spaced apart from each other, a substantially constant cross-section over at least 150 ° of the circumferential surface, and in the region of each ring end. Since it has the recessed part opened toward the internal peripheral surface, it becomes possible to engage a clamping tool reliably in the recessed part of a ring end. The recess can reach the annular surface until the clamping tool can be introduced without difficulty. By having the same cross-section across the wide part of the anchoring ring, it is effectively prevented that the ring end sinks in the annular groove until the clamping tool can no longer be inserted into the recess.
A particularly surprising property of this anchoring ring is that the axial force that can be absorbed by the anchoring ring is stronger than in the case of similar retaining rings for shafts.
As another unexpected effect, the anchoring ring substantially maintains its circular shape—with a reduced diameter—when tightening both ring ends.
In a preferred embodiment of this anchoring ring, the substantially constant cross-sectional area is rectangular, square, circular or oval in cross section and is symmetric with respect to the ring end.
In a preferred embodiment of the anchoring ring, a substantially constant cross-sectional area extends over less than 250 °, preferably about 202 °, of the anchoring ring periphery. A particularly simple fastening ring assembly and disassembly is thus possible.
In one embodiment of the anchoring ring, a respective recess that opens towards the outer peripheral surface of the anchoring ring is adjacent to both ends of a substantially constant cross-sectional area. In this way, the fixing ring can be securely held in this position after being brought into the compressed position by the clamping tool.
In order to hold the anchoring ring in each compression position as reliably as possible, it is advantageous for each recess opening towards the outer peripheral surface of the anchoring ring to form an angular range of about 5 ° to 30 °.
In a particularly preferred embodiment of the anchoring ring, each recess opening towards the outer peripheral surface of the anchoring ring has a bottom that is eccentric and inwardly displaced with respect to the envelope of the anchoring ring, the bottom being convex. Preferably it has a substantially semicircular shape. If the circle with a smaller diameter than the envelope of the anchoring ring is displaced by about 1% to 10% of the envelope diameter of the anchoring ring from the center of the envelope mainly toward the constant cross-sectional area, the bottom eccentricity Rate can be defined.
In order to prevent the sticking ring from sticking or tilting during assembly, the bottom of each recess opening toward the outer peripheral surface of the sticking ring is followed by a side surface of the recess with a rounded transition.
In order to securely hold the fixing ring in the compressed position, preferably, a side surface closer to each ring end of each recess opening toward the outer peripheral surface of the fixing ring is more than a side surface farther from each ring end. deep.
Each recess opening toward the outer peripheral surface of the fixing ring occupies about 10% to 60% of the cross section of the fixing ring.

In order to be able to compress the ring end as much as necessary so that the anchoring ring can be easily transferred to its assembled position, the ring end is preferably between 5 ° and 50 when the anchoring ring is stationary. They are separated from each other by an opening angle of °.
In order to facilitate the engagement of the clamping tool for easy disassembly under tight circumstances, the recess opening towards the inner peripheral surface is preferably followed by a substantially semicircular convex bottom It has a straight side.
The recesses opening towards the inner peripheral surface each have a central axis away from the center of the anchoring ring so that a strong clamping force can also be applied to the end of the ring for compression or tightening of the anchoring ring.
Preferably, the central axis away from the center of the anchoring ring forms an angle of about 5 ° to 25 ° with the axis of symmetry of the anchoring ring. As a result, a strong clamping force is possible, and at the same time, the gripping device or the clamping device can be securely gripped even under tight circumstances.

The fixing ring assembling apparatus described above includes a receiving portion for a fixing ring whose ring end is at least partially compressed, and a recess that protrudes from the receiving portion and opens toward the outer peripheral surface of the fixing ring. The fixing ring can be easily and reliably assembled quickly even in a tight environment.
Preferably, the receiving portion is formed by a sleeve whose one end face approximates the shape of the peripheral surface of the fixing ring. A protrusion is disposed on this end face.
In one embodiment of the device, the receiving part has at least one taper in the form of a circular section or a fan-shaped cross section, on which a sliding mechanism is arranged. With this sliding mechanism, the fastening ring at the location of the device can be moved to its assembled end position.
The receiving part is preferably a first sliding mechanism acting on the anchoring ring in the region of the ring end, and a second sliding element which is arranged to face the first sliding mechanism on the diameter and which can be operated with it. Moving mechanism. In this way, the fixing ring to be inserted deeply into the hole can also be assembled simply and quickly (possibly even with an automatic operating device having this device).
In order to move the fixing ring into the annular groove provided in the hole or behind the step by means of this device, each sliding mechanism is retracted in the longitudinal direction of the sleeve and retracted from the receptacle and from the protrusion. It is slidable between the forward positions that will project.
In this device, according to one particularly preferred embodiment, the sleeve is arranged to receive a member or assembly to be secured with a securing ring. When the sleeve receives the member or assembly with a precise fit, a quick and reliable assembly can be achieved even with small tolerances.

The present invention is also a method for assembling a fixing ring having an inner peripheral surface and an outer peripheral surface, the fixing ring having a pair of ring ends (11, 12) spaced apart from each other and a constant cross section. A region (B) extending at least 150 degrees on the peripheral surface, a recess (13, 14) opened to the inner peripheral surface side in a region of each ring end (11, 12), and a region (B ) Adjacent to each terminal portion, and having recesses (17, 18) that open to the outer peripheral surface side, and are circular when the fixing ring is stationary, and a pair of ring ends (11, 12) Are fastened while substantially maintaining their circular shape, and the fixing ring assembling method includes a step (a) of reducing the diameter of the fixing ring by bringing the pair of ring ends (11, 12) close to each other. , A step to maintain the reduced diameter state of the fixing ring (B), a step (c) of inserting the fixing ring to the groove or shoulder of the opening on the assembly side, and a step of expanding the diameter of the fixing ring to be seated in the groove or to contact the shoulder (d) ).
The diameter reduction step (a) is performed using the concave portions (13, 14) opened to the inner peripheral surface side.
In the holding step (b), the recesses (17, 18) opened on the outer peripheral surface side of the fixing ring are separated by a distance smaller than the distance between the recesses (17, 18) opened on the outer peripheral surface side. This is the step (b1) performed by engaging the pair of protrusions (33, 34). In this case, the diameter-expanding step (d) is a step (d1) made by the recesses (17, 18) opening on the outer peripheral surface side being removed from the protrusions (33, 34). Is preferred. Further, the diameter expansion step is preferably performed by sliding the fixing ring so that the concave portion is released from the protrusion.

  Other advantageous configurations, developments and features of the present invention will be described below with reference to the drawings.

  FIG. 1 (a) shows a fixing ring that is punched from cold drawn spring steel and subjected to a dry zinc phosphate treatment, and is substantially circular when stationary. The anchoring ring has two ring ends 11, 12 spaced apart from each other and has a substantially constant cross section over a region B of approximately 202 °. The region B is arranged symmetrically toward the ring ends 11 and 12, and the fixing ring is symmetric with respect to the symmetry axis S of the fixing ring extending between the ring ends 11 and 12.

  Concave portions 13 and 14 opening toward the inner peripheral surface of the fixing ring are provided in the regions of the ring ends 11 and 12. These recesses 13, 14 serve to tension the ring prior to assembly of the ring. Adjacent to both ends of a substantially constant region B of the cross-section are respective recesses 17, 18 that open toward the outer peripheral surface of the fastening ring. These recesses 17 and 18 form an opening angle a of about 21 °. The recesses 17 and 18 have bottoms 21 and 22 that are offset inward with respect to the envelope u of the fixing ring, and these bottoms 21 and 22 are offset from the center of the envelope u with a center. The cross-sectional shape is a semicircular convex shape. The bottoms 21, 22 of the recesses 17, 18 that open outwardly are followed by rounded side surfaces 17a, 17b; 18a, 18b with transitions 17c, 17d; 18c, 18d, respectively. The inwardly displaced bottoms 21 and 22 are eccentric by the section E in the direction of the region B along the symmetry axis S, so that the ring ends 11 and 12 in the recesses 17 and 18 that open outwardly The closer side surfaces 17a and 18a are deeper than the side surfaces 17b and 18b far from the ring ends 11 and 12, respectively. The recesses 17 and 18 that open outwardly are approximately ¼ in the region of the side surfaces 17b and 18b far from the ring ends 11 and 12, and the side surfaces 17a and 18a closer to the ring ends 11 and 12 respectively. The cross-section of the anchoring ring is reduced by about half in the region.

  The ring ends 11, 12 are spaced apart from each other by an opening angle b of about 30 ° when stationary.

  The recesses 13, 14 opening towards the inner peripheral surface have semicircular bottoms 23, 25, which are followed by parallel side surfaces 13a, 13b; 14a, 14b extending linearly on both sides. . Recesses 13 and 14 that open inwardly protrude into the cross section of the fixing ring, and the cross section D is reduced to about 20% to 40% at the thinnest part of the ring ends 11 and 12. The inwardly opening recesses 13, 14 are aligned such that their central axis M is away from the center of the anchoring ring. The central axis M of the recesses 13 and 14 forms an angle c of about 15 ° with respect to the symmetry axis S of the fixing ring as shown in FIG.

  An apparatus for assembling the fixing ring described above is shown in FIGS. This device has a receptacle 30 for a fastening ring (not shown). The receiving portion 30 is formed by the end surface 30a of the tubular sleeve 32. The end surface 30a of the sleeve 32 has a shape that approximates the shape of the peripheral surface of the fixing ring and is substantially annular. Two protrusions 33 and 34 are arranged on the end face 30a, and when the ring end is compressed, the protrusions are engaged so that the protrusions are engaged in the shape fitting type in the recesses opening toward the outer peripheral surface of the fixing ring. The shape is selected. On the outer surface of the tubular sleeve 32, the protrusions 33 and 34 are terminated on the same plane as the sleeve 32.

  The receiving part 30, in other words the cylindrical sleeve 32, has two chordally tapered parts 36, 37 (see FIG. 4) that face each other in diameter, and these tapered parts 36, 37 are both projecting parts 33, 34. Are arranged at right angles to the symmetry axis V extending between them.

  A first sliding mechanism 39 and a second sliding mechanism 38 are disposed at each of the string-shaped tapered portions 36 and 37, and these sliding mechanisms 38 and 39 protrude beyond the circumscribed circle of the sleeve 32. The dimensions are selected so that they do not. The first sliding mechanism 39 acts on the fixing ring in the receiving part 30 in the region of the ring ends 11, 12 between the projections 33, 34. The second sliding mechanism 38 acts in the closed region of the fixing ring. A retracted position in which the sliding mechanisms 38, 39 are retracted in the axial direction with respect to the receiving portion 30 or the end face 30a, and an advanced position in which the sliding mechanisms 38, 39 protrude in the axial direction from the protrusions 33, 34. Between the two sliding mechanisms 38, 39 so that both the sliding mechanisms 38, 39 can slide parallel to the longitudinal axis W of the sleeve 32 (see FIG. 2). ) Can be operated together.

  The sleeve 32 has a cavity 42. The cavity 42 is arranged to receive the member to be secured by the securing ring with an accurate fit.

  The method according to the invention for securing a member or assembly by means of the fastening ring described above will now be described with reference to FIG.

  FIG. 5 shows a part of the mechanical operating unit to which the fixing ring of the present invention is attached. The other part is a conventional structure such as that shown in EP 0403635B1. The cylinder 50 contains a spring retainer 52 for the spring 54. The spring retainer 52 and the spring 54 are partially illustrated. The spring 54 acts on the operation rod 56 via the spring retainer 52.

  In order to assemble the spring retainer 52 and the members attached thereto into the cylinder 50, the spring retainer 52 is pre-assembled together with other members into one assembly. After the gripping device 60 is engaged in the recesses 13 and 14 that open toward the inner peripheral surface at the ring ends 11 and 12 of the fixing ring 60 and the fixing ring 60 is tightened by the gripping device, the fixing ring 60 is tightened. Is placed on the end face 30 a of the receiving portion 30. In so doing, the diameter of the anchoring ring 60 decreases, but substantially maintains its annular shape. That is, the fixing ring 60 has an annular shape before and after the diameter reduction and also when the diameter is reduced. Protrusions 33 and 34 provided on the end surface 30a of the sleeve 32 engage with the recesses 17 and 18 opened to the outer peripheral surface side, and the fixing ring 60 is held at the reduced diameter. Next, a pre-assembled assembly with the spring retainer 52 is introduced into the cavity 42 of the sleeve 32. Next, the fixing ring 60 and the assembly are introduced into the cylinder 50 until the fixing ring 60 is positioned in the annular groove 62 provided on the inner wall of the cylinder 50. Next, both sliding mechanisms 38 and 39 are slid from their retracted positions to their advanced positions. The fixing ring 60 advances from the receiving portion 30, and the outward recesses 17 and 18 of the fixing ring 60 are disengaged from the protrusions 33 and 34. The fixing ring 60 remains in an annular shape and has an enlarged diameter and is engaged in the annular groove 62. The spring holder 52 is thus held in the cylinder 50 so as not to be detached. Subsequently, the sleeve 32 is pulled out from the cylinder 50. Thus, the assembling work is completed.

  When disassembling, the gripping tool of the gripping device is engaged with the recesses 13 and 14 that open toward the inner peripheral surface of the fixing ring 60, and the fixing ring 60 is tightened by the gripping device to reduce its diameter. In this state, the fixing ring 60 can be pulled out from the annular groove 62 in the axial direction of the cylinder 50. In this state, the assembly is free and can be removed from the cylinder 50.

(A) is a schematic plan view of an adhering ring, (b) is an enlarged plan view of part A of (a). It is the schematic sectional drawing which looked at the apparatus for assembling the fixation ring of FIG. 1 from the front. It is the right view which looked at the adhering ring assembly apparatus of FIG. 2 from the side. FIG. 3 is a plan view of the fixing ring assembling apparatus of FIG. 2 viewed from above. It is sectional drawing which shows partially the mechanical operation mechanism which assembled | attached the assembly by the fixing ring of FIG. 1 using the fixing ring assembly apparatus of FIG.

Explanation of symbols

11, 12 Ring end 13, 14 Recessed portion opened on inner peripheral surface side 17, 18 Recessed portion opened on outer peripheral surface side 13a, 13b, 14a, 14b, 17a, 17b, 18a, 18b Side surface 17c, 17d, 18c, 18d Transition portion 21, 22 Bottom 23, 25 Semicircular bottom 30 Receiving portion (receiving means)
30a End surface 32 Sleeve 33, 34 Protruding portion 36, 37 Tapered portion 38 Second sliding means 39 First sliding means 42 Cavity 50 Cylinder 52 Spring retainer 54 Spring 56 Operation rod 60 Fixing ring 62 Annular groove a Opening angle B region b Opening angle c Angle formed between the central axis and the symmetric axis D Cross section E Section M Central axis S Symmetric axis u Envelope V Symmetric axis W Longitudinal axis

Claims (22)

An apparatus for assembling a fixing ring having an inner peripheral surface and an outer peripheral surface,
The fixing ring has a pair of ring ends (11, 12) spaced apart from each other, a region (B) extending at least 150 degrees on the peripheral surface having a constant cross section, and an inner periphery in the region of each ring end (11, 12). There are recesses (13, 14) that open to the surface side, and recesses (17, 18) that open to the outer peripheral surface side adjacent to the end portions of the region (B) having a certain cross section. When the fixing ring is in a stationary state, the ring is circular, and when the pair of ring ends (11, 12) are brought close to each other, the ring is tightened while substantially maintaining the circular shape,
The fixing ring receiving means (30) for pressurizing the pair of ring ends (11, 12) to some extent, and the recesses (17, 18) protruding from the receiving means (30) and opening to the outer peripheral surface side A fixing ring assembling apparatus comprising a plurality of engaging projections (33, 34). The fixing ring extends between the pair of ring ends (11, 12) and has a symmetry axis in which the pair of ring ends (11, 12) is symmetrically arranged, and a region (B) having a certain cross section The fixing ring assembling apparatus according to claim 1, wherein the fixing ring assembling apparatus is symmetrical with respect to an axis of symmetry. 3. The fixing ring assembling apparatus according to claim 1, wherein the region (B) having a constant cross section has an angle of up to 250 degrees. The fixing ring assembling apparatus according to claim 3, wherein the angle of the region (B) having a constant cross section is 202 degrees. 5. The fixing according to claim 1, wherein the opening angle (a) of the recesses (17, 18) opening on the outer peripheral surface side is in the range of 5 to 30 degrees. Ring assembly device. 6. The fixing ring assembling apparatus according to claim 5, wherein an opening angle (a) of the recesses (17, 18) opened to the outer peripheral surface side is 21 degrees. The fixing ring has a bottom (21, 22) that is offset inwardly with respect to the envelope (u) on the outer peripheral surface in each concave portion (17, 18) that opens to the outer peripheral surface side, The fixing ring assembling apparatus according to any one of claims 1 to 6, wherein each bottom (21, 22) has a convex cross-sectional shape. 8. A fixing ring assembling device according to claim 7, characterized in that the cross section of each bottom (21, 22) is semicircular. Each recessed part (17, 18) opened to the outer peripheral surface side has a plurality of side surfaces (17a, 17b; 18a, 18b) adjacent to the bottom (21, 22), respectively, and each side surface (17a, 17b; The fixing ring assembling device according to claim 7 or 8, characterized in that 18a, 18b) have rounded transitions (17c, 17d; 18c, 18d). Of the side surfaces adjacent to the bottom (21, 22), the side surface (17a, 18a) closer to the ring end (11, 12) is the side surface (17b, 18b) farther from the ring end (11, 12). The fixing ring assembling apparatus according to claim 9, wherein the fixing ring assembling apparatus is deeper. 11. The cross section of each recess (17, 18) opened to the outer peripheral surface side is within a range of 10% to 60% of the cross section in the region (B). The fixing ring assembling apparatus according to claim 1. 12. The fixing ring assembling device according to claim 1, wherein an opening angle (b) between the pair of ring ends (11, 12) is in a range of 5 to 50 degrees. . Each recessed part (13, 14) opened to the inner peripheral surface side is a U-shape composed of a semicircular bottom (23, 25) and a plurality of linear side surfaces (13a, 13b; 14a, 14b) following the semicircular bottom (23, 25). The fixing ring assembling apparatus according to any one of claims 1 to 12, wherein the fixing ring assembling apparatus is any one of the above. The fixing ring has a central axis (M) extending in the longitudinal direction of each recess (13, 14) opened to the inner peripheral surface side, and each central axis (M) is separated from the central point of the fixing ring. The fixing ring assembling apparatus according to claim 13, wherein the fixing ring assembling apparatus is provided. 15. The fixing ring assembling apparatus according to claim 14, wherein an angle (c) formed by the central axis (M) and the symmetry axis (S) is in the range of 5 degrees to 25 degrees. The receiving means (30) is a sleeve (32) having a shape approximating the shape of the peripheral surface of the fixing ring, and a protrusion (33, 34) is provided on the surface (30a) of the sleeve (32). The fixing ring assembling apparatus according to any one of claims 1 to 15. The receiving means (30) has at least one tapered section (36, 37) with a cross-section of an arc-shaped section or arc-shaped section;
A first sliding means (39) provided in the vicinity of the end portion engaged with the fixing ring, a first sliding means (39) that is diametrically opposed to the first sliding means (39), and And second sliding means (38) that can move with the taper (36, 37),
The first and second sliding means (39, 38) have a length of the sleeve (32) between a retracted position with respect to the receiving means (30) and an advanced position protruding beyond the protrusions (33, 34). The fixing ring assembling apparatus according to claim 16, wherein the fixing ring assembling apparatus can move in a direction. 18. An anchoring ring assembly apparatus according to claim 16 or 17, characterized in that the sleeve (32) is adapted to be inserted into a member or assembly for securing the anchoring ring. A method for assembling a fixing ring having an inner peripheral surface and an outer peripheral surface,
The fixing ring has a pair of ring ends (11, 12) spaced apart from each other, a region (B) extending at least 150 degrees on the peripheral surface having a constant cross section, and an inner periphery in the region of each ring end (11, 12). There are recesses (13, 14) that open to the surface side, and recesses (17, 18) that open to the outer peripheral surface side adjacent to the end portions of the region (B) having a certain cross section. When the fixing ring is in a stationary state, the ring is circular, and when the pair of ring ends (11, 12) are brought close to each other, the ring is tightened while substantially maintaining the circular shape,
The fixing ring assembling method includes a step (a) of reducing the diameter of the fixing ring by bringing the pair of ring ends (11, 12) close to each other, a step (b) of maintaining the reduced diameter state of the fixing ring, A step (c) in which the fixing ring is inserted into the groove or shoulder of the opening and a step (d) in which the diameter of the fixing ring is expanded and seated in the groove or in contact with the shoulder. How to assemble the fixing ring. 20. The fixing ring assembling method according to claim 19, wherein the diameter reducing step (a) is performed using recesses (13, 14) opened to the inner peripheral surface side. In the holding step (b), the recesses (17, 18) opened on the outer peripheral surface side of the fixing ring are separated by a distance smaller than the distance between the recesses (17, 18) opened on the outer peripheral surface side. The fixing ring assembling method according to claim 19, wherein the fixing ring assembling method is a step (b1) performed by engaging the pair of protrusions (33, 34). The diameter-expanding step (d) is a step (d1) performed by removing the recesses (17, 18) opened on the outer peripheral surface side from the protrusions (33, 34). The fixing ring assembling method described in 1.

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