JP6565318B2 - Manufacturing method and manufacturing apparatus for assembling snap ring - Google Patents

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for assembling a snap ring used in a driving force transmission device for a vehicle.

  Conventionally, for example, a double roller 10 as shown in FIG. 1 is employed in a joint portion on the differential side of a drive shaft mounted on a vehicle in order to reduce the forcing force. The double roller 10 includes an inner ring 11 and an outer ring 12 arranged coaxially, a plurality of needles 13 interposed between the inner ring 11 and the outer ring 12, and an inner circumferential groove (snap) of the outer ring 12 as a cylindrical member. And a snap ring 15 that is fitted in a ring groove 14 to prevent the needle 13 from falling off. The double roller 10 is normally assembled by an operator's manual work.

  Here, the C-shaped snap ring 15 is formed in a state where the cut is inclined with respect to the radial direction so that the needle 13 does not fall off from the cut. When the snap ring 15 is assembled to the snap ring groove 14, the operator reduces the outer diameter of the snap ring 15 by elastic deformation and inserts the snap ring 15 into a predetermined position inside the snap ring groove 14, and then to the snap ring 15. Release the pressing force. As a result, the snap ring is expanded in diameter by elastic recovery and fitted into the snap ring groove 14 and assembled.

  Patent Document 1 discloses a snap ring assembly device capable of smoothly reducing the diameter of a snap ring when the snap ring is reduced in diameter by an inner peripheral surface of an insertion hole of a jig and assembled to an object. It is disclosed. The snap ring assembling apparatus includes a jig having a tapered insertion hole, and an insertion member arranged to be movable relative to the jig in the axial direction of the insertion hole. Then, the assembly object is arranged on the outlet side of the insertion hole, and a snap ring having a slit inclined with respect to the radial direction is inserted into the insertion hole, the jig and the insertion member are relatively moved, and the snap ring is After the diameter is reduced by the inner peripheral surface of the insertion hole, the diameter is increased by the elasticity of the snap ring and assembled to the object.

Japanese Patent Laid-Open No. 11-19831

  However, in the snap ring assembling apparatus described in Patent Document 1, when the snap ring has a slit inclined with respect to the radial direction, the outer acute angle end portion having an acute angle corner portion on the outer diameter side of both ends of the snap ring. Therefore, only one of the front and back surfaces of the snap ring can be assembled. Moreover, it cannot be assembled unless the snap ring and the insertion member are in phase. Therefore, when the operator sets the snap ring in the insertion hole of the jig, it is necessary to match the front and back of the snap ring and the phase. In particular, regarding the phase, even if there is a slight deviation, it is impossible to assemble, so the burden on the operator is large.

  The present invention has been made in view of the above circumstances, and can determine the phase of a snap ring having a slit inclined with respect to the radial direction to easily and reliably assemble the snap ring. It is a problem to be solved to provide a manufacturing method and a manufacturing apparatus for assembling the above.

(Manufacturing method for assembling a snap ring)
In the manufacturing method for assembling the snap ring, a snap ring formed in an annular shape and having a slit inclined in the radial direction is disposed in a tapered insertion hole, and the snap ring is pressed in the axial direction by a protrusion. In the manufacturing method in which the snap ring is reduced in diameter so that both ends of the snap ring overlap with each other, and then the snap ring is elastically returned to the inner circumferential groove of the tubular member and assembled, the outer diameter side of both ends of the snap ring A phase determining step for determining a phase of the outer acute angle end portion having an acute angle portion, a phase matching step for rotating the snap ring to match the phase of the outer acute angle end portion with respect to the protrusion portion, and the protrusion portion. A fitting step of fitting the snap ring into an inner circumferential groove of the tubular member by pressing the outer acute angle end portion side of the snap ring; Provided. Thereby, since a fitting process is performed after performing a phase determination process and a phase alignment process, the assembly | attachment of a snap ring can be performed easily and reliably.

(Manufacturing equipment for assembling snap rings)
A manufacturing apparatus for assembling a snap ring includes a snap ring formed in an annular shape and having a slit inclined with respect to a radial direction arranged in a tapered insertion hole, and the snap ring is pressed in an axial direction by a protrusion. In the manufacturing apparatus in which the snap ring is reduced in diameter so that both ends of the snap ring are overlapped with each other and then the snap ring is expanded in the inner circumferential groove of the cylindrical member, and the cut is made with respect to the rotating snap ring. by entering the, outer determining a phase of acute end phase determination jig having an acute angle portion on the inner outer diameter side of both ends of the snap ring, the outer acute angle relative to the protrusion by rotating the snap ring A phase adjusting device for adjusting the phase of the end portion, and a taper-shaped insertion for reducing the diameter from the entrance side to the exit side of the snap ring A first jig having: Is provided. Thereby, there exists an effect similar to the effect in the manufacturing method which assembles | attaches the snap ring mentioned above.

It is sectional drawing of the roller member which is the target object which attaches a snap ring in embodiment of this invention. It is a top view which shows the front side of the snap ring used in the manufacturing method which assembles | attaches the snap ring of embodiment of this invention. It is a top view which shows the back side of the snap ring used in the manufacturing method which assembles | attaches the snap ring of embodiment of this invention. It is a schematic block diagram of the site | part which performs the front-and-back discrimination | determination of a snap ring of the manufacturing apparatus which assembles | attaches the snap ring which concerns on embodiment of this invention, and a phase determination process and a phase alignment process. It is a figure which shows the 1st and 2nd phase determination jig | tool of the manufacturing apparatus which assemble | attaches the snap ring which concerns on embodiment of this invention, Comprising: It is A arrow view of FIG. It is explanatory drawing which shows the operation | movement which matches the phase of a projection part and an outer acute angle edge part in case the snap ring is arrange | positioned face up in the manufacturing apparatus which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the operation | movement which matches the phase of a projection part and an outer acute angle edge part in case the snap ring is arrange | positioned back in the manufacturing apparatus which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the 1st jig | tool and 2nd jig | tool of the manufacturing apparatus which assemble | attaches the snap ring which concerns on embodiment of this invention in a partial cross section. It is explanatory drawing which shows the position of the fixed pin and movable pin which press the snap ring arrange | positioned at the insertion hole of the 2nd jig | tool in the manufacturing apparatus which assembles | attaches the snap ring which concerns on embodiment of this invention. It is a flowchart of the manufacturing method which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the state just before starting a fitting process in the manufacturing method which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the state in the middle of a fitting process in the manufacturing method which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the state in the middle of a fitting process in the manufacturing method which assembles | attaches the snap ring which concerns on embodiment of this invention. It is explanatory drawing which shows the state at the time of completion | finish of a fitting process in the manufacturing method which assembles | attaches the snap ring which concerns on embodiment of this invention.

  Hereinafter, embodiments of a manufacturing method and a manufacturing apparatus for assembling a snap ring according to the present invention will be specifically described with reference to the drawings.

Embodiment 1
The manufacturing method for assembling the snap ring of this embodiment is shown in FIGS. 2A and 2B with respect to the inner circumferential groove (snap ring groove) 14 of the outer ring (tubular member) 12 of the double roller 10 shown in FIG. This is a method of assembling the snap ring 15. As shown in FIGS. 2A and 2B, the snap ring 15 is formed in an annular shape and has a slit that is inclined (about 30 degrees) with respect to the radial direction. Therefore, the snap ring 15 has an outer acute angle end portion 15a having an acute angle corner portion on the outer diameter side, and an inner acute angle end portion 15b having an acute angle corner portion on the inner diameter side. 2A shows the front side of the snap ring, and FIG. 2B shows the back side of the snap ring.

  Next, a manufacturing apparatus used in the manufacturing method for assembling the snap ring of this embodiment will be described with reference to FIGS. As shown in FIGS. 3, 5A, and 5B, the manufacturing apparatus of the present embodiment includes a phase matching device that includes a rotary table 22, a control unit (not shown), and the like, and first and second phase determination jigs 23A. , 23B, a first jig 31, and a second jig 35.

  As shown in FIG. 3, the phase matching device includes a base 21, a rotary table 22 that has a mounting surface on which the snap ring 15 is mounted on the upper surface, and is rotatably provided on the base 21. A control unit (not shown) for controlling the rotation of the table 22. Above the rotary table 22, the first and second phase determination jigs 23 </ b> A and 23 </ b> B formed in the shape of a long bar are relative to the base 24 that can be moved up and down in the vertical direction (axial direction). It is mounted movably. In addition, raising / lowering of the base 24 is controlled by the said control part. As shown in FIG. 3, the first and second phase determination jigs 23 </ b> A and 23 </ b> B are provided at predetermined positions where the lower tip comes into contact with the snap ring 15 placed on the rotary table 22 and rotating from above. It has been. The first and second phase determination jigs 23A and 23B are always urged downward by a spring member 25 (FIG. 3).

  A thin plate-like insertion portion that can be inserted into the cut of the snap ring 15 is provided at the lower ends of the first and second phase determination jigs 23A and 23B. When the snap ring 15 is placed face up on the rotary table 22, the first phase determination jig 23A has the same inclination angle with respect to the radial direction of the snap ring 15 so that the insertion portion enters the cut. Are arranged as follows. As a result, the first phase determination jig 23A determines that the snap ring 15 is placed face up by the insertion portion entering the cut, and at the same time, the first acute angle end portion 15a of the snap ring 15 Determine the phase.

  Further, the second phase determination jig 23B is configured such that when the snap ring 15 is placed face down on the rotary table 22, the angle of inclination of the snap ring 15 with respect to the radial direction is such that the insertion portion enters the cut. They are arranged to be the same. Accordingly, the second phase determination jig 23B determines that the snap ring 15 is placed face down by the insertion portion entering the cut, and at the same time, the outer acute angle end portion 15a of the snap ring 15 The phase of is determined.

  When the insertion portion at the lower end of the first and second phase determination jigs 23A and 23B is inserted into the cut of the snap ring 15, the photomicrosensor 26 detects the displacement, and the detection signal is transmitted to the control unit. Send to. Upon receiving this detection signal, the control unit temporarily stops the rotary table 22, removes the insertion portions of the first and second phase determination jigs 23 </ b> A and 23 </ b> B from the cut of the snap ring 15, and then sets the rotary table 22 to a predetermined level. The phase is rotated by a predetermined angle in the direction, and the phase of the outer acute angle end 15a with respect to the protrusion (movable pin 38) is adjusted.

  That is, for example, when the snap ring 15 is placed face up, as shown in FIG. 5A, the rotary table 22 is rotated by a predetermined angle in the arrow X direction (counterclockwise direction). Conversely, when the snap ring 15 is placed face down, as shown in FIG. 5B, the rotary table 22 is rotated by a predetermined angle in the arrow Y direction (clockwise direction).

  As shown in FIG. 6, the first jig 31 is formed in a cylindrical shape and gradually decreases in diameter from the entrance side (upper side in FIG. 6) to the exit side (lower side in FIG. 6) of the snap ring 15. A tapered insertion hole 32 is provided. On the outlet side of the first jig 31, a housing portion 33 that houses the double roller 10 that is an assembly target of the snap ring 15 is provided. The first jig 31 can be moved up and down by a drive unit (not shown).

  As shown in FIG. 6, the second jig 35 is formed in a columnar shape, and is arranged so as to be movable back and forth in the axial direction with respect to the insertion hole 32 of the first jig 31 by a drive unit (not shown). Yes. The second jig 35 includes a cylindrical main body 36 and two fixing pins 37 and one that constitute a projection that protrudes in the axial direction from the front end surface of the main body 36 in the insertion direction and presses the snap ring 15. The movable pin 38 is provided. The movable pin 38 is supported so as to be movable back and forth in the pressing direction with respect to the main body portion 36, and is always urged in the pressing direction by a spring member 39.

  As shown in FIG. 7, the movable pin 38 is disposed at a position that presses the outer acute angle end portion 15 a of the snap ring 15, and the two fixed pins 37 are disposed at a position that is substantially equiangularly spaced from the movable pin 38. Has been. Thus, the second jig 35 is configured to press the snap ring 15 disposed in the insertion hole 32 of the first jig 31 with a total of three fixed pins 37 and movable pins 38 pins. Note that the lower tip of the movable pin 38 protrudes a predetermined amount below the lower tip of the fixed pin 37. As a result, the outer acute angle end portion 15a of the snap ring 15 is pressed by the movable pin 38 prior to the other portions, so that the outer acute angle end portion 15a and the inner acute angle end portion 15b overlap each other in the axial direction. In such a state, the diameter is reduced.

  Next, the snap ring 15 shown in FIGS. 2A and 2B is formed on the inner circumferential groove (snap ring groove) 14 of the outer ring 12 of the double roller 10 shown in FIG. 1 by the manufacturing apparatus for assembling the snap ring 15 described above. A manufacturing method for assembling the above will be described. The manufacturing method of this embodiment performs the phase determination process S10, the phase matching process S20, and the fitting process S30 in order, as in the flowchart shown in FIG.

  In the phase determination step S <b> 10, one snap ring 15 is placed at a predetermined position on the rotary table 22. At this time, the phase of the front and back of the snap ring 15 and the outer acute angle end portion 15a (cut) is not questioned. Subsequently, the base portion 24 is lowered by the operation of the control portion, and the insertion portion at the lower end of the first and second phase determination jigs 23 </ b> A and 23 </ b> B is placed at a predetermined position on the rotary table 22. Keep in contact with.

  In this state, the control unit rotates the rotary table 22 in one direction (whichever direction may be used). Thereby, for example, when the snap ring 15 is placed on the turntable 22 face up, the insertion portion at the tip of the first phase determination jig 23A before the snap ring 15 makes one turn on the turntable 22. Enters the cut of the snap ring 15. At this time, the photomicrosensor 26 detects the displacement of the first phase determination jig 23A and sends a detection signal to the control unit, and the rotation table 22 stops rotating by the control unit that receives this detection signal. As a result, the first phase determination jig 23A determines that the snap ring 15 is placed face up by the insertion portion entering the cut, and at the same time, the first acute angle end portion 15a of the snap ring 15 Determine the phase.

  In addition, when the snap ring 15 is placed face down on the turntable 22, the insertion portion at the tip of the second phase determination jig 23B is not moved until the snap ring 15 makes one turn on the turntable 22. It enters into the cut of the snap ring 15. At this time, the photomicrosensor 26 detects the displacement of the second phase determination jig 23B and sends a detection signal to the control unit, and the rotation table 22 stops rotating by the control unit that has received this detection signal. Accordingly, the second phase determination jig 23B determines that the snap ring 15 is placed face down by the insertion portion entering the cut, and at the same time, the outer acute angle end portion 15a of the snap ring 15 The phase of is determined.

  In the next phase matching step S20, after the insertion portions of the first and second phase determination jigs 23A and 23B are removed from the cut of the snap ring 15, the control unit rotates the rotary table 22 in a predetermined direction by a predetermined angle. When the snap ring 15 is placed in the insertion hole 32 of the first jig 31, the outer acute angle end 15a is phase-matched with the movable pin 38 (protrusion).

  That is, for example, when the snap ring 15 is placed face up on the turntable 22, as shown in FIG. 5A, the turntable 22 is rotated by a predetermined angle in the arrow X direction (counterclockwise direction). As a result, the snap ring 15 is rotationally moved to a position where the outer acute angle end portion 15 a is in the same phase as the movable pin 38. Conversely, when the snap ring 15 is placed face down on the turntable 22, as shown in FIG. 5B, the turntable 22 is rotated by a predetermined angle in the arrow Y direction (clockwise direction). As a result, the snap ring 15 is rotationally moved to a position where the outer acute angle end portion 15 a is in the same phase as the movable pin 38.

  The phase of the outer acute angle end portion 15a is preferably a position where the movable pin 38 is close to the obtuse angle corner portion in a range where the movable pin 38 is not located on the tip side of the obtuse angle corner portion inside the outer acute angle end portion 15a. In this way, in the fitting step S30 described later, the outer acute angle end portion 15a can be more reliably pressed by the movable pin 38 while avoiding interference between the movable pin 38 and the inner acute angle end portion 15b.

  In the next fitting step S <b> 30, as shown in FIG. 9, the double roller 10 that is the assembly target of the snap ring 15 is disposed at a predetermined position on the work table 40 below the first jig 31. Then, after completing the phase alignment step S20, the snap ring 15 phase-aligned on the rotary table 22 is gripped with a gripping tool (not shown) or the like and translated to the insertion hole 32 of the first jig 31. Insert and place. At this time, the state where the phase of the outer acute angle end portion 15a of the snap ring 15 and the phase of the movable pin 38 of the second jig 35 are matched is maintained.

  Subsequently, as shown in FIG. 10, the drive unit is operated to lower the first and second jigs 31 and 35. As a result, the first jig 31 stops in a state where the double roller 10 that is the assembly target is accommodated in the accommodation portion 33 provided on the lower outlet side of the first jig 31, and then the second jig 35. Goes down further. As a result, the three fixed pins 37 and the movable pin 38 of the second jig 35 press the snap ring 15 downward. At this time, since the movable pin 38 that presses the outer acute angle end portion 15a side of the snap ring 15 protrudes downward by a predetermined amount from the fixed pin 37 that presses the other portion, the outer acute angle end portion 15a is the other portion. It is pressed by the movable pin 38 in advance. Thereby, the snap ring 15 is reduced in diameter in a state where the outer acute angle end portion 15a and the inner acute angle end portion 15b are staggered in the axial direction.

  Then, as shown in FIG. 11, the outer acute angle end portion 15a that has reached the inner circumferential groove (snap ring groove) 14 of the double roller 10 first expands due to elastic recovery and snaps ahead of other portions. Fits into the groove 14. After that, as shown in FIG. 12, the other portion pressed by the fixing pin 37 reaching the snap ring groove 14 is expanded in diameter by elastic recovery and fitted into the snap ring groove 14, and the entire snap ring 15 is snapped. The assembly is completed by fitting into the ring groove 14. Note that immediately before the snap ring 15 as a whole is fitted into the snap ring groove 14, the movable pin 38 protruding downward from the fixed pin 37 stops at a predetermined position against the urging force of the spring member 39. This part is awaited to be fitted into the snap ring groove 14.

  Thereafter, the drive unit is actuated to raise the first and second jigs 31 and 35 and return to the initial position, and then the double roller 10 having completed the assembly of the snap ring 15 is taken out and the snap ring 15 is assembled. Exit.

  As described above, according to the manufacturing method for assembling the snap ring of the present embodiment, since the fitting step S30 is performed after the phase determination step S10 and the phase alignment step S20, the snap ring 15 is assembled. Can be performed easily and reliably.

  In the phase determination step S10, the front and back of the snap ring 15 are determined, and the phase of the outer acute angle end 15a is determined at the position of the cut according to the front and back. Thereby, in the phase determination step S10, the front / back determination and the phase determination of the snap ring 15 are performed at the same time, so that the assembly can be performed reliably regardless of whether the snap ring 15 is front / back.

  In the phase matching step S20, the snap ring 15 is rotated in a predetermined direction according to the front and back of the snap ring 15 determined in the phase determination step S10. As a result, the assembly can be performed reliably regardless of whether the snap ring 15 is front or back.

  Further, in the fitting step S30, after the outer acute angle end portion 15a of the snap ring 15 is fitted into the snap ring groove 14 of the double roller 10, other portions are fitted. As a result, the snap ring 15 can be reliably assembled since the outer acute angle end portion 15a of the snap ring 15 is fitted first.

  And according to the manufacturing apparatus which assembles | attaches the snap ring of this embodiment, there exists an effect similar to the effect in the manufacturing method which assembles | attaches said snap ring 15. FIG. In addition, the phase determination jig is mounted on the first phase determination jig 23 </ b> A for determining the phase of the outer acute angle end portion 15 a by entering the cut with respect to the snap ring 15 that is mounted face-up and rotates. And a second phase determination jig 23B that determines the phase of the outer acute angle end portion 15a by entering the cut with respect to the snap ring 15 that is placed and rotated. Thereby, the front and back of the snap ring 15 can be simultaneously determined by the first and second phase determination jigs 23A and 23B.

  Further, the second jig 35 includes a columnar main body portion 36, and a fixed pin 37 and a movable pin 38 that project from the distal end surface of the main body portion 36 in the axial direction and constitute a protrusion portion. Thereby, the 2nd jig | tool 35 which can press the outer acute angle edge part 15a of the snap ring 15 reliably is realizable with a simple structure.

  The movable pin 38 is supported by the main body 36 so as to be movable back and forth in the pressing direction, and is always urged by the spring member 39 in the pressing direction. Thereby, the outer acute angle end portion 15 a of the snap ring 15 can be reliably pressed by the movable pin 38.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the fitting step S30 is configured to fit the outer acute angle end 15a of the snap ring 15 after the outer acute angle end 15a is fitted to the snap ring groove 14, but the outer acute angle end. After fitting the portion 15 a into the snap ring groove 14, the movable pin 38 that presses the outer acute end 15 a is retracted to the same position as the fixed pin 37, and the other part of the snap ring 15 is pressed by the fixed pin 37. You may make it fit. In this way, the snap ring 15 can be reliably assembled.

  Further, in the fitting step S30, after the outer acute angle end portion 15a of the snap ring 15 is fitted into the snap ring groove 14, the movable pin 38 and the snap ring 15 are rotated relative to each other to move other portions of the snap ring 15. The pins 38 may be pressed and fitted. If it does in this way, the snap ring 15 whole can be pressed and assembled | attached only with the movable pin 38 which presses the outer acute angle edge part 15a of the snap ring 15. FIG.

  10: Double roller, 14: Inner circumferential groove (snap ring groove), 15: Snap ring, 15a: Outer acute angle end, 15b: Inner acute angle end, 22: Rotary table, 23A: First phase determination jig, 23B : Second phase determination jig, 25: spring member, 26: photomicrosensor, 31: first jig, 32: insertion hole, 35: second jig, 37: fixed pin, 38: movable pin, 39: Spring member.

Claims (10)

A snap ring formed in an annular shape and having a slit that is inclined with respect to the radial direction is arranged in a tapered insertion hole, and the snap ring is pressed in the axial direction by a protrusion, thereby causing both ends of the snap ring to move. In the manufacturing method in which the snap ring is elastically returned to the inner circumferential groove of the cylindrical member and assembled after being reduced in diameter so as to overlap,
A phase determination step for determining a phase of an outer acute angle end portion having an acute angle portion on an outer diameter side of both ends of the snap ring;
A phase matching step of rotating the snap ring to match the phase of the outer acute angle end with respect to the protrusion; and
A fitting step of fitting the snap ring into an inner circumferential groove of the cylindrical member by pressing the outer acute angle end portion side of the snap ring at the protrusion;
Manufacturing method for assembling a snap ring comprising   The method for assembling a snap ring according to claim 1, wherein the phase determination step determines the front and back of the snap ring and determines the phase of the outer acute angle end portion at the position of the cut according to the front and back.   The manufacturing method for assembling the snap ring according to claim 2, wherein the phase adjusting step rotates the snap ring in a predetermined direction according to the front and back of the snap ring determined in the phase determining step.   The snap ring according to any one of claims 1 to 3, wherein in the fitting step, after the outer acute angle end portion of the snap ring is fitted into the inner circumferential groove of the cylindrical member, the other portion is fitted. Manufacturing method to be assembled.   In the fitting step, after the outer acute angle end portion of the snap ring is fitted into the inner circumferential groove of the cylindrical member, the protrusion that presses the outer acute angle end portion is retracted to a predetermined position, and the snap The manufacturing method which assembles | attaches the snap ring of any one of Claims 1-4 which presses and fits the other part of a ring with another protrusion part.   In the fitting step, after the outer acute angle end of the snap ring is fitted into the inner circumferential groove of the cylindrical member, the protrusion and the snap ring are rotated relative to each other to rotate the other part of the snap ring. The manufacturing method which assembles | attaches the snap ring of any one of Claims 1-4 which presses and fits. A snap ring formed in an annular shape and having a slit that is inclined with respect to the radial direction is arranged in a tapered insertion hole, and the snap ring is pressed in the axial direction by a protrusion, thereby causing both ends of the snap ring to move. In the manufacturing apparatus which is assembled by expanding the snap ring in the inner circumferential groove of the cylindrical member after reducing the diameter so as to overlap,
By entering the cut with respect to the snap ring to rotate and determining the phase determination jig phase of the outer sharp edge having an acute angle portion on the inner outer diameter side of both ends of the snap ring,
A phase matching device that rotates the snap ring to match the phase of the outer acute angle end with respect to the protrusion;
A first jig having a tapered insertion hole whose diameter decreases from the entrance side of the snap ring toward the exit side;
A second jig that is arranged so as to be movable back and forth in the axial direction with respect to the insertion hole of the first jig, and has the protrusion at the distal end in the insertion direction to the insertion hole;
Manufacturing equipment for assembling a snap ring comprising   The phase determination jig is mounted face down with a first phase determination jig that determines the phase of the outer acute angle end portion by entering the cut with respect to the snap ring that is mounted face-up and rotates. A manufacturing apparatus for assembling the snap ring according to claim 7, further comprising: a second phase determination jig that determines the phase of the outer acute angle end portion by entering the cut with respect to the rotated snap ring.   9. The snap ring according to claim 7, wherein the second jig includes a cylindrical main body portion, and a fixed pin and a movable pin that protrude in an axial direction from a front end surface of the main body portion and constitute the protrusion portion. Assembly equipment to be assembled.   The manufacturing apparatus for assembling the snap ring according to claim 9, wherein the movable pin is supported by the main body portion so as to be movable back and forth in the pressing direction, and is always urged in the pressing direction by a spring member.

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