Apparatus for assembling assembly

Abstract

To efficiently assemble an assembly composed of a roller and a cage by a procedure of temporarily arranging a plurality of the rollers with respect to the cage and then inserting the rollers into pockets.SOLUTION: The assembling device 10 is an assembling device of an assembly 50 including a cage 70 having a large-diameter annular part 71, a small-diameter annular part 72, a plurality of columns 73, a plurality of pockets 74, and a large-diameter side roller stop part 75 formed so as to protrude into the pockets 74 from a region on the large-diameter annular part 71 side and on the radially inner side of the columns 73, and a plurality of rollers 60.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an assembly device for an assembly that constitutes a roller bearing. [Background technology]

[0002] Conventionally, for a roller bearing including rollers and a cage, a technique is known in which an assembly is created in which rollers are loaded into pockets in the cage, and then the assembly is combined with an outer ring and an inner ring to assemble the roller bearing (see Patent Document 1).

[0003] In Patent Document 1, to load tapered rollers into pockets of a cage, an inner jig is used to guide the large-diameter end of the tapered roller from the radially inner side of the pocket toward the radially outer side, and an outer jig is used to press the small-diameter end of the tapered roller from the radially outer side of the pocket toward the radially inner side, and the tapered roller is rotated by both jigs to load the tapered roller into the pocket. In Patent Document 1, tapered rollers are supplied and temporarily positioned in the cage one by one from the tapered roller supply section toward the pocket, and then assembled into the pocket using the inner jig and outer jig. Then, other tapered rollers are sequentially supplied and assembled into the pocket using the same procedure. In other words, in the conventional technology described in Patent Document 1, rollers are temporarily positioned one by one in the pocket and then loaded one by one.

[0004] In order to improve the efficiency of assembling the assembly, it is being considered to adopt a method in which a plurality of rollers (for example, all of them) are temporarily arranged together in the cage, and then the rollers are loaded into the pockets to assemble the assembly. In this case, it is believed that assembling the assembly consisting of the cage and rollers can be carried out more efficiently than with the conventional technology disclosed in Patent Document 1. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-052379 Summary of the Invention [Problem to be solved by the invention]

[0006] However, if a procedure is adopted in which multiple rollers are temporarily arranged together in the cage and then the rollers are loaded into the pockets, there is a concern that the other temporarily arranged rollers may be displaced due to vibrations, etc. that occur when the rollers are loaded. In this case, the effort required to correct the position of the displaced rollers increases, and there is a possibility that the efficiency of the assembly work will decrease.

[0007] An object of the present disclosure is to efficiently assemble an assembly consisting of rollers and a cage by a procedure in which a plurality of rollers are temporarily arranged together relative to a cage and then the rollers are loaded into pockets. [Means for solving the problem]

[0008] The present disclosure provides an assembly device for an assembly including a cage having a large-diameter annular portion provided on one axial side, a small-diameter annular portion smaller in diameter than the large-diameter annular portion and provided on the other axial side, a plurality of pillars connecting the large-diameter annular portion and the small-diameter annular portion, a plurality of pockets formed between adjacent pillars in the circumferential direction, and roller stop portions formed to protrude into the pockets from regions of the pillars on the large-diameter annular portion side and radially inward, and a plurality of rollers accommodated in the plurality of pockets, the assembly comprising: a cage receiving portion having a cage mounting surface on which the cage can be placed with the small-diameter annular portion facing downward; a roller pushing portion that pushes the rollers, which are temporarily positioned on the radially inward side of the cage, into the pockets; and an elastically deformable roller support portion that supports the temporarily positioned rollers from below, wherein the roller stop portions and the roller support portions support the temporarily positioned rollers.

[0009] According to the present disclosure, an assembly consisting of rollers and a cage can be efficiently assembled by a procedure in which a plurality of rollers are temporarily arranged together relative to a cage and then the rollers are loaded into pockets. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic cross-sectional view showing an assembly device of the present disclosure. [Figure 2] FIG. 2 is a schematic plan view showing the assembly apparatus of the present disclosure. [Figure 3] FIG. 3 is a schematic side view showing an assembly apparatus of the present disclosure. [Figure 4] FIG. 4 is a schematic cross-sectional view showing an assembly to be assembled by the assembly device of the present disclosure. [Figure 5] FIG. 5 is a schematic cross-sectional view showing a cage that constitutes the assembly. [Figure 6] FIG. 6 is a schematic diagram of a conventional assembly device that does not include a roller support portion. [Figure 7] FIG. 7 is a diagram showing the procedure for assembling an assembly using the assembling device of the present disclosure (in a state where the retainer is arranged). [Figure 8] FIG. 8 is a diagram showing the procedure for assembling an assembly using the assembling device of the present disclosure (in a state where rollers are temporarily placed). [Figure 9] FIG. 9 is a diagram showing the assembly procedure (in which the rollers are pushed into the pockets) of the assembly using the assembly device of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] <Details of the embodiment of the present disclosure> [Outline of the assembly equipment] FIG. 1 is a schematic cross-sectional view showing an assembly apparatus of the present disclosure. FIG. 2 is a schematic plan view showing an assembly apparatus of the present disclosure. FIG. 3 is a schematic side view showing an assembly apparatus of the present disclosure. FIG. 4 is a schematic cross-sectional view showing an assembly to be assembled by the assembly apparatus of the present disclosure. FIGS. 1 to 3 show assembly apparatus 10, which is one embodiment of the assembly apparatus of the present disclosure. Assembly apparatus 10 is an apparatus used to assemble assembly 50 (see FIG. 4) that constitutes a part of a roller bearing (not shown). The roller bearing exemplified in this embodiment is a tapered roller bearing that includes tapered rollers (see FIG. 4). Assembly 50 to be assembled by assembly apparatus 10 of the present disclosure may also be an assembly that constitutes a part of a roller bearing that includes cylindrical rollers.

[0012] As shown in Figures 1 to 3, the assembly device 10 has a center line C1. The assembly device 10 is used with the center line C1 facing up and down. The direction along the center line C1 and the direction parallel to the center line C1 are defined as the "axial direction" of the assembly device 10. The upper side in Figure 1 is the "one axial side," and the lower side in Figure 1 is the "other axial side." The assembly device 10 is used with one axial side facing up and the other axial side facing down. The direction perpendicular to the center line C1 is defined as the "radial direction" of the assembly device 10. The direction along a circle centered on the center line C1 is defined as the "circumferential direction" of the assembly device 10.

[0013] [About the assembly] As shown in FIG. 4, the assembly 50 is composed of rollers 60 and a cage 70. The assembly 50 constitutes part of the roller bearing (not shown) and is assembled to an outer ring and an inner ring (not shown). The assembly 50 has a center line C2. The center line C2 is also the center line of the cage 70. The direction along the center line C2 and the direction parallel to the center line C2 are defined as the "axial direction" of the assembly 50 and the cage 70. The direction perpendicular to the center line C2 is defined as the "radial direction" of the assembly 50 and the cage 70. The direction along a circle centered on the center line C2 is defined as the "circumferential direction" of the assembly 50 and the cage 70. The upper side in FIG. 4 is the "one axial side," and the lower side in FIG. 4 is the "other axial side." The cage 70 is placed in the assembly device 10 with the center line C2 aligned with the center line C1. The assembly 50 assembled by the assembly device 10 (see FIGS. 1 to 3) is in a position where one axial side faces upward and the other axial side faces downward.

[0014] [About the rollers] As shown in FIG. 4, rollers 60 constituting the assembly 50 of this embodiment are tapered rollers.

[0015] The assembly 50 has a center line C3. The center line C3 is also the center line of the rollers 60. The "axial direction," "radial direction," and "circumferential direction" in the explanation of the rollers 60 will be defined below. The "axial direction" of the rollers 60 in the assembly 50 is the direction along the center line C3. To distinguish it from the axial direction of the assembly apparatus 10 and the assembly 50, the axial direction of the rollers 60 in the assembly 50 will also be referred to as the "roller axial direction." Note that the roller axial direction includes a direction parallel to the center line C3. The "radial direction" of the rollers 60 in the assembly 50 is the direction perpendicular to the center line C3, and is also referred to as the "roller radial direction." The "circumferential direction" of the rollers 60 in the assembly 50 is the direction along a circle centered on the center line C3, and is also referred to as the "roller circumferential direction."

[0016] The rollers 60, which are tapered rollers, have a large end face 61 on one side in the roller axial direction and a small end face 62 on the other side in the roller axial direction. Note that although this embodiment illustrates rollers 60 that are tapered rollers, rollers 60 may also be cylindrical rollers.

[0017] [Regarding the cage] Fig. 5 is a schematic cross-sectional view showing a cage that constitutes an assembly. As shown in Figs. 4 and 5, the cage 70 has a large-diameter annular portion 71 located on one axial side, a small-diameter annular portion 72 located on the other axial side, and a plurality of pillars 73 connecting the large-diameter annular portion 71 and the small-diameter annular portion 72. The cage 70 has pockets 74 between the large-diameter annular portion 71 and the small-diameter annular portion 72, between two adjacent pillars 73, 73 in the circumferential direction. The cage 70 holds one roller 60 in one pocket 74. The cage 70 has a plurality of pockets 74 and holds a plurality of rollers 60.

[0018] The cage 70 further includes a large diameter side roller stop portion 75 and a small diameter side roller stop portion 76. The large diameter side roller stop portion 75 is formed to protrude into the pocket 74 from a region on the large diameter annular portion 71 side of the pillar 73 and on the radially inner side. The large diameter side roller stop portion 75 prevents the rollers 60 loaded in the pocket 74 from slipping out of the pocket 74 to one axial side and the radially inner side. The small diameter side roller stop portion 76 is formed to protrude into the pocket 74 from a region on the small diameter annular portion 72 side of the pillar 73 and on the radially outer side. The small diameter side roller stop portion 76 prevents the rollers 60 loaded in the pocket 74 from slipping out of the pocket 74 to the other axial side and the radially outer side.

[0019] [Overall configuration of the assembly device] As shown in Figures 1 to 3, the assembly device 10 is equipped with a cage receiving portion 20 and a roller support portion 30. The center line C1 of the assembly device 10 is the center line of both the cage receiving portion 20 and the roller support portion 30. The cage receiving portion 20 and the roller support portion 30 are used with the center line C1 facing in the vertical direction. The assembly device 10 further includes a roller pushing portion 40 (see Figure 9), which will be described later.

[0020] [Regarding the retainer receiving part] As shown in FIGS. 1 to 3, the cage receiving portion 20 includes a substantially disk-shaped main body 21 having a center line C1 (see FIG. 2 in particular). The main body 21 in this embodiment is made of resin. The main body 21 may also be made of metal. The main body 21 is disposed with one axial side facing upward and the other axial side facing downward. The cage receiving portion 20 includes a cage mounting surface 22, a roller bearing surface 23, and an upper surface 24 formed on one axial side (upper side) of the main body 21. The cage mounting surface 22, the roller bearing surface 23, and the upper surface 24 are formed in this order from the radially outer side toward the radially inner side. The cage receiving portion 20 further includes a lower surface 25 formed on the other axial side (lower side) of the main body, an outer circumferential surface 26 formed on the radially outer side, and a step surface 27 connecting the cage mounting surface 22 and the roller bearing surface 23.

[0021] The cage mounting surface 22 is a surface on which the cage 70 (see FIG. 4) is mounted, and is an annular flat surface centered on the center line C1 in a plan view. The roller bearing surface 23 is a conical surface centered on the center line C1 and has a downward slope toward the radially outer side. The outer peripheral surface 26 and the stepped surface 27 are cylindrical surfaces centered on the center line C1.

[0022] [Regarding roller support parts] The roller support portion 30 is a portion that supports the rollers 60 that have been temporarily placed in the cage 70 when the assembly 50 is assembled using the assembly device 10. As shown in FIGS. 1 to 3, the roller support portion 30 includes a main body portion 31 and a support portion 32. The main body portion 31 is a cylindrical portion, and is provided along the outer peripheral surface 26 of the cage receiving portion 20. The main body portion 31 of the roller support portion 30 is fixed to the outer peripheral surface 26 using fixing members such as screws (not shown). The main body portion 31 may also be fixed to the outer peripheral surface 26 using an adhesive.

[0023] The support portion 32 is a tongue-shaped protrusion having a substantially trapezoidal shape when viewed from the radial direction. The support portion 32 is provided so as to extend from one axial end of the main body portion 31 to one axial side. The support portion 32 is a portion that comes into contact with the rollers 60 temporarily placed in the cage 70 when the assembly 50 is assembled using the assembly device 10. The number of support portions 32 provided is the same as the number of rollers 60 in the assembly 50 to be assembled (in other words, the number of pockets 74 in the cage 70 to be assembled).

[0024] The roller support portion 30 is made of a flat plate-like member. The roller support portion 30 in this embodiment is made of resin and is elastically deformable. The roller support portion 30 may be made of an elastic material other than resin. The roller support portion 30 is provided in a continuous manner in the circumferential direction of the main body 21 and is configured in an annular shape in plan view. Although the roller support portion 30 in this embodiment is continuous in the circumferential direction, it may also be divided into multiple portions.

[0025] In this way, in the assembly device 10 of the present disclosure, the roller support portion 30 is made of resin. In this case, the elastically deformable roller support portion 30 can be easily installed in the cage receiving portion 20.

[0026] [Assembly procedure using conventional assembly equipment] Here, the procedure for assembling assembly 50 (see FIG. 4) using a conventional assembly device will be described. FIG. 6 is a schematic diagram of a conventional assembly device that does not have a roller support portion. FIG. 6 shows a conventional assembly device 110 used to assemble assembly 50. Assembly device 110 differs from assembly device 10 (see FIG. 1) of the present disclosure in that it does not have a roller support portion 30, but has the same configuration as assembly device 10 in other respects.

[0027] The upper diagram of Figure 6 shows a state in which rollers 60 have been temporarily positioned on the radially inner side of each pocket 74 using a feeder (not shown) of assembly device 110. At this time, the outer peripheral surface 63 of roller 60 temporarily positioned on the radially inner side of cage 70 is in contact with large diameter side roller stopper portion 75 on the large end face 61 side. In this case, the outer peripheral surface 63 of roller 60 on the large end face 61 side is supported by large diameter side roller stopper portion 75, and the outer peripheral surface 63 on the small end face 62 side is not supported.

[0028] Next, the assembly device 110 uses the roller pushing portion 40 (see FIG. 9 ), which will be described later, to push the rollers 60 into each pocket 74. The rollers 60 are pressed by the roller pushing portion 40, and move over the large diameter side roller stop portion 75 and are pushed into each pocket 74.

[0029] When the conventional assembly device 110 is used, rollers 60, whose outer peripheral surfaces 63 on the large end face 61 side only are supported by the large diameter side roller stopper portions 75, may tip over, as shown in the lower diagram of FIG. 6, due to vibrations generated when other rollers 60 ride over the large diameter side roller stopper portions 75. If a roller 60 tips over, the assembly device 110 must be stopped temporarily, and the labor required to correct the position of the toppled roller 60 is required. When such a conventional assembly device 110 is used, if a procedure is adopted in which multiple rollers 60 are temporarily positioned together in the cage 70 and then the rollers 60 are loaded into the pockets 74, it is laborious to correct the position of the toppled roller 60. In this case, the time required to assemble the assembly 50 is actually longer, and work efficiency cannot be improved.

[0030] [Regarding assembly procedure using the assembly device of the present disclosure] Here, the procedure for assembling an assembly 50 (see FIG. 4) using the assembly device 10 (see FIG. 1) of the present disclosure will be described. FIG. 7 is a diagram showing the procedure for assembling an assembly using the assembly device of the present disclosure (with the cage in place). FIG. 8 is a diagram showing the procedure for assembling an assembly using the assembly device of the present disclosure (with the rollers temporarily placed). FIG. 9 is a diagram showing the procedure for assembling an assembly using the assembly device of the present disclosure (with the rollers pushed into the pockets).

[0031] When assembling assembly 50 using assembly device 10 of the present disclosure, first, cage 70 is placed on cage mounting surface 22, as shown in Fig. 7. At this time, the end face on the other axial side (lower side) of small diameter annular portion 72 of cage 70 contacts cage mounting surface 22, and the inner circumferential surface of small diameter annular portion 72 contacts step surface 27. At this time, support portion 32 of roller support portion 30 is located inside pocket 74.

[0032] When assembling the assembly 50 using the assembly device 10 of the present disclosure, next, as shown in FIG. 8 , a feeder (not shown) is used to temporarily place the rollers 60 together on the radially inward side of each pocket 74. At this time, one roller 60 is temporarily placed in each of all pockets 74 of the cage 70. The temporarily placed rollers 60 have their outer peripheral surfaces 63 on the large end face 61 side in contact with the large diameter side roller stop portion 75, and their outer peripheral surfaces 63 on the small end face 62 side in contact with the support portion 32. Furthermore, at this time, the small end face 62 of the roller 60 is in contact with the roller receiving surface 23.

[0033] In this way, when assembly 50 is assembled using assembly device 10, temporarily placed roller 60 is supported at its lower side (outer peripheral surface 63 on the small end face 62 side) by support portion 32, and at its upper side (outer peripheral surface 63 on the large end face 61 side) by large diameter side roller stop portion 75. In this case, because temporarily placed roller 60 is supported on at least one side and the other side in the roller axial direction, it is less likely to tip over (see the lower diagram in Figure 6).

[0034] [Regarding the roller push-in section] As shown in FIG. 9 , the assembly device 10 includes a roller pushing unit 40. The roller pushing unit 40 includes a support shaft 41 and a push-in roller 42 rotatably supported by the support shaft 41. The support shaft 41 is supported by a displacement device (not shown) so that it can be displaced in the circumferential direction. The push-in roller 42 is configured to be displaceable in the circumferential direction while sequentially pressing the rollers 60 aligned and arranged on the radially inner side of each pocket 74 in accordance with the displacement of the support shaft 41 by the displacement device. The assembly device 10 can use the roller pushing unit 40 to push the rollers 60, which are temporarily arranged together on the radially inner side of each pocket 74, into the pockets 74 one by one.

[0035] When assembling assembly 50 using assembly device 10 of the present disclosure, next, as shown in Fig. 9, roller pusher 40 presses temporarily placed rollers 60 one by one in a direction substantially perpendicular to the roller axial direction. As a result, rollers 60 are pressed by roller pusher 40 and pushed into each pocket 74. At this time, rollers 60 move smoothly into pocket 74 as small end faces 62 slide along roller receiving surfaces 23.

[0036] As described above, in the assembly apparatus 10 of the present disclosure, the cage receiving portion 20 is provided with a roller receiving surface 23 that contacts the small end face 62 on the small diameter annular portion 72 side of the roller 60 that is temporarily arranged on the radially inner side of the cage 70. In this case, the roller 60 that is temporarily arranged on the radially inner side of the cage 70 can be supported at at least three points: the roller support portion 30, the large diameter side roller stop portion 75, and the roller receiving surface 23. This reliably prevents the roller 60 from falling out (falling over) from the pocket 74 due to vibrations that occur when the roller pushing portion 40 pushes the roller 60 into the pocket 74. Furthermore, when the roller pushing portion 40 pushes the roller 60 into the pocket 74, the roller 60 can slide along the roller receiving surface 23. This allows the roller pushing portion 40 to smoothly push the roller 60 into the pocket 74.

[0037] Roller 60 pressed by pusher roller 42 moves over large diameter side roller stopper 75 into pocket 74. At this time, roller support portion 30 is pressed by roller 60 and elastically deformed as roller 60 moves into pocket 74. Then, when roller 60 is housed inside pocket 74, support portion 32 still supports roller 60. At this time, support portion 32 (after elastic deformation) is located outside pocket 74 (on the radially outer side and the other axial side).

[0038] Thus, in the assembly device 10 of the present disclosure, the roller support portion 30 is configured to be elastically deformable, and is pressed by the roller 60 and elastically deformed when the temporarily placed roller 60 is pressed into the pocket 74 by the roller pushing portion 40. The roller support portion 30 is located inside the pocket 74 when the roller 60 is temporarily placed radially inward of the cage 70, and is located outside the pocket 74 when the roller 60 is pushed into the pocket 74.

[0039] The assembly device 10 configured in this manner can continue to support, by the roller support parts 30, the plurality of rollers 60 that have been temporarily placed together in the cage 70 until they are accommodated in the pockets 74. In this way, the assembly device 10 can prevent the temporarily placed rollers 60 from falling out (falling over) from the pockets 74. According to the assembly device 10 configured in this manner, the assembly 50 can be efficiently assembled by adopting a procedure in which the plurality (all of the rollers 60) are temporarily placed together on the radially inward side of the cage 70, and then the rollers 60 are sequentially pressed into the pockets 74 by the roller pressing parts 40.

[0040] As described above, the assembly device 10 of the present disclosure is an assembly device for an assembly 50 including a retainer 70 having a large-diameter annular portion 71 provided on one axial side, a small-diameter annular portion 72 that is smaller in diameter than the large-diameter annular portion 71 and is provided on the other axial side, a plurality of pillars 73 connecting the large-diameter annular portion 71 and the small-diameter annular portion 72, a plurality of pockets 74 formed between circumferentially adjacent pillars 73, 73, and a large-diameter side roller stop portion 75 formed so as to protrude into the pocket 74 from a region of the pillars 73 on the large-diameter annular portion 71 side and radially inward, and a plurality of rollers 60 accommodated in the plurality of pockets 74. The assembly device 10 of the present disclosure comprises a retainer receiving portion 20 having a retainer mounting surface 22 on which a retainer 70 can be placed with its small diameter annular portion 72 facing downward, a roller pushing portion 40 that pushes rollers 60 temporarily positioned on the radially inner side of the retainer 70 into pockets 74, and an elastically deformable roller support portion 30 that supports the temporarily positioned rollers 60 from below.

[0041] According to the assembling device 10 for the assembly 50 configured in this manner, the rollers 60 temporarily positioned on the radially inward side of the cage 70 are supported by the roller support portions 30 and the large diameter side roller stop portions 75, thereby making it possible to prevent the rollers 60 from falling out of the pockets 74 due to vibrations that occur when the roller pushing portions 40 push the rollers 60 into the pockets 74. In this case, when temporarily positioning a plurality of rollers 60 together in the cage 70 and then loading the rollers 60 one by one into the pockets 74, it is possible to reduce the effort required to correct the position of the rollers 60. As a result, by adopting the procedure of temporarily positioning a plurality of rollers 60 together in the cage 70 and then loading the rollers 60 into the pockets 74, the assembly 50 consisting of the rollers 60 and the cage 70 can be efficiently assembled.

[0042] In the assembly apparatus 10 of this embodiment, the roller support portion 30 is located inside the pocket 74 when the roller 60 is temporarily placed in the retainer 70, and is located outside the pocket 74 when the roller 60 is pressed into the pocket 74. According to this configuration, the rollers 60 can continue to be supported by the roller support portion 30 from the state in which they are temporarily arranged in the cage 70 until they are pressed into the pockets 74. This makes it possible to reliably prevent the rollers 60 from falling out of the pockets 74 due to vibrations that occur when the roller pushing portion 40 pushes the rollers 60 into the pockets 74.

[0043] In the assembly device 10 of this embodiment, when the rollers 60 are pressed into the pockets 74, the roller support portions 30 are pressed by the rollers 60 and elastically deformed. According to this configuration, the rollers 60 can continue to be supported by the roller support portion 30 from the state in which they are temporarily arranged in the cage 70 until they are pressed into the pockets 74. This makes it possible to reliably prevent the rollers 60 from falling out of the pockets 74 due to vibrations that occur when the roller pushing portion 40 pushes the rollers 60 into the pockets 74.

[0044] In the assembly device 10 of this embodiment, the roller support portion 30 is made of resin. In this case, the elastically deformable roller support portion 30 can be easily installed on the cage receiving portion 20.

[0045] In the assembly device 10 of this embodiment, the cage receiving portion 20 further includes a roller receiving surface 23 that contacts the end face of the roller 60 on the small diameter annular portion 72 side, the roller 60 being temporarily arranged on the radially inner side of the cage 70. With this configuration, the rollers 60 temporarily arranged on the radially inward side of the cage 70 can be supported at least at three points: the roller support portions 30, the large diameter side roller stop portions 75, and the roller receiving surfaces 23. This reliably prevents the rollers 60 from falling out of the pockets 74 due to vibrations that occur when the roller pushing portions 40 push the rollers 60 into the pockets 74. Furthermore, when pushing the rollers 60 into the pockets 74, the rollers 60 can slide along the roller receiving surfaces 23. This allows the rollers 60 to be pushed into the pockets 74 smoothly. [Explanation of symbols]

[0046] 10: Assembly equipment 20: Cage receiving part 22:Cage placement surface 23: Roller bearing surface 30: Roller support part 40: Roller push-in part 50: Assembly 60: Koro 70: Retainer 71: Large diameter annular part 72: Small diameter annular part 73: Pillar 74: Pocket 75: Large diameter side roller stop part (roller stop part)

Claims

1. a cage including a large-diameter annular portion provided on one axial side, a small-diameter annular portion having a smaller diameter than the large-diameter annular portion and provided on the other axial side, a plurality of pillars connecting the large-diameter annular portion and the small-diameter annular portion, a plurality of pockets formed between the pillars adjacent in the circumferential direction, and roller stop portions formed so as to protrude into the pockets from regions of the pillars on the large-diameter annular portion side and on the radially inner side; and a plurality of rollers housed in the plurality of pockets, a cage receiving portion having a cage mounting surface on which the cage can be mounted with the small diameter annular portion facing downward; a roller pushing portion that pushes the rollers, which are temporarily arranged on the radially inner side of the cage, into the pockets; and an elastically deformable roller support portion that supports the temporarily arranged rollers from below.

2. The roller support portion is The rollers are located inside the pockets when the rollers are temporarily placed in the cage, and 2. The assembly device according to claim 1, wherein said roller is positioned outside said pocket when pressed into said pocket.

3. The roller support portion is 3. The assembly device according to claim 1, wherein when said roller is pushed into said pocket, said roller is pressed and elastically deformed.

4. 3. The assembly device according to claim 1, wherein the roller support portion is made of resin.

5. The retainer receiving portion is 3. The assembly device according to claim 1, further comprising a roller bearing surface that contacts an end face of the roller temporarily arranged on the radially inner side of the cage on the side of the small diameter annular portion.

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