JP2018004061A - Sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure sufficient air tightness without being influenced by dimension accuracy at manufacturing.SOLUTION: In a sealing device 1 for sealing a clearance between an annular external peripheral side member 51 and an annular internal peripheral side member 55 which is at least partially surrounded by the external peripheral side member 51 which are mutually and relatively rotatable with respect to an axial line x, the sealing device comprises a sealing device main body 70 attached to the external peripheral side member 51, and a slinger 90 attached to an outside face 56a of a flange part 56 extending to an external peripheral side in a radial direction from an inside end part of the internal peripheral side member 55. The sealing device main body 70 comprises an annular reinforcing ring 71 with an axial line x as a center, and an annular elastic body part 75 with the axial line x as a center which is composed of an elastic body attached to the reinforcing ring 71. The elastic body part 75 has at least one seal lip 77 abutting on the slinger 90, and the slinger 90 has an adhesive 95 which is applied on an inside face 91ca of an external peripheral side end part 91c of the slinger 90 which face-contacts with the outside face 56a of the flange part 56.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing device, and more particularly, to a sealing device used for preventing entry of foreign matter such as rainwater and muddy water in a vehicle or the like.

  Conventionally, in a vehicle such as an automobile, a hub bearing that rotatably supports a wheel is in an environment where it is directly exposed to foreign matters such as rainwater, muddy water, and dust. For this reason, conventionally, a sealing device for sealing the inside of the hub bearing is attached. The sealing device includes a sealing device body fitted inside the outer ring of the hub bearing and a slinger fitted outside the inner ring of the hub bearing, and seals the lubricant inside the hub bearing. In order to prevent foreign matter from entering the door (see, for example, Patent Document 1).

  In this type of hub bearing, a sealing device is integrally attached to an outer ring of the hub bearing in advance. For example, as shown in FIG. 5, the hub bearing 110 includes an outer ring 111 that is annular with respect to the axis x, and an annular inner ring 112 that is at least partially surrounded by the outer ring 111. The hub bearing 110 is a rolling bearing. A rolling element (ball) (not shown) is disposed between the outer ring 111 and the inner ring 112 so that the outer ring 111 and the inner ring 112 can be rotated relative to each other.

  An annular space is formed between the outer ring 111 and the inner ring 112, and a sealing device 120 is press-fitted between the outer ring 111 and the inner ring 112 in order to seal this space. The sealing device 120 includes an annular sealing device main body 130 fitted into the outer ring 111 and an annular slinger 140 fitted outside the inner ring 112.

  The sealing device main body 130 includes an annular reinforcing ring 131 and an elastic body portion 132 made of a rubber material integrally formed so as to cover the reinforcing ring 131. The reinforcing ring 131 has a substantially L-shaped cross section along the axis x, and a cylindrical portion on the outer peripheral side (in the direction of the arrow c) of the reinforcing ring 131 is liquid-tightly fitted to the inner peripheral surface of the outer ring 111. ing. The elastic body portion 132 is formed on the inner side (arrow b direction) of the reinforcing ring 131, and extends radially outward (arrow a direction) and inner circumferential side (arrow d direction) in the axis x direction. , An inner peripheral side lip 132b and an outer peripheral side lip 132c extending inward (arrow b direction) are provided.

  The slinger 140 is a metal member having a substantially L-shaped cross section along the axis x. The slinger 140 has a slinger cylindrical portion 141 that is a cylindrical portion on the inner peripheral side (arrow d direction), and an annular shape that extends from the inside (arrow b direction) end of the slinger cylindrical portion 141 to the outer peripheral side (arrow c direction). And a slinger bending portion 143 that is a curved portion that connects the slinger cylindrical portion 141 and the slinger disc portion 142.

  The slinger cylindrical portion 141 is liquid-tightly fitted to the outer peripheral surface 112a of the inner ring 112. The slinger disc portion 142 has a rubber 144 vulcanized and bonded to a surface (hereinafter also referred to as “inner surface”) 142ai of the tip portion 142a on the outer peripheral side (arrow c direction) (hereinafter also referred to as “inner side surface”). .

  The rubber 144 has an annular disk shape, and protrudes inward (in the direction of arrow b) from the inner side surface 142ai of the distal end portion 142a of the slinger disk portion 142. The rubber 144 bonded to the tip end portion 142a of the slinger disc portion 142 is pressed against the inner side surface 113a of the flange portion 113 of the inner ring 112 in a liquid-tight manner. As a result, the gap between the slinger disk portion 142 of the slinger 140 and the flange portion 113 of the inner ring 112 is sealed with the rubber 144.

JP 2013-234748 A

  However, in the sealing device 120 having the above-described configuration, the rubber 144 of the slinger disk portion 142 is removed from the flange portion by the pushing force to the flange portion 113 generated when the slinger 140 is fitted to the outer peripheral surface 112a of the inner ring 112. It is only pressed against the inner side surface 113 a of 113. For this reason, the amount of crushing of the rubber 144 pressed against the inner side surface 113a of the flange portion 113 is insufficient, and the airtightness is not always sufficient.

  Further, in order to secure the amount of crushing of the rubber 144 in order to obtain sufficient airtightness, when the slinger 140 is fitted to the flange portion 113 of the inner ring 112, a pressing force of a certain level or more must be maintained. For that purpose, the dimensional accuracy at the time of manufacture of the inner ring 112 and the slinger 140 has to be strictly controlled.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing device that can ensure sufficient hermeticity without being affected by dimensional accuracy during manufacturing.

  In order to achieve the above object, in the present invention, an annular outer peripheral member (51) that can rotate relative to each other about the axis (x), and an annular member that is at least partially surrounded by the outer peripheral member (51). A sealing device (1) for sealing between an inner peripheral side member (55), a sealing device main body (70) attached to the outer peripheral side member (51), and an inner side of the inner peripheral side member (55) A slinger (90) attached to the outer surface (56a) of the flange portion (56) extending radially outward from the end, and the sealing device body (70) is centered on the axis (x) An annular reinforcing ring (71), and an annular elastic body part (75) centered on the axis (x) made of an elastic body attached to the reinforcing ring (71). (75) is a small abutment against the slinger (90). The slinger (90) has at least one seal lip (77), and the slinger (90) is in contact with the outer surface (56a) of the flange portion (56). It is characterized by including an adhesive (95) applied to the inner surface (91ca).

  In the sealing device (1) according to an aspect of the present invention, the adhesive (95) is annularly applied in a circumferential direction on the inner surface (91ca) of the slinger (90). .

  In the sealing device (1) according to one aspect of the present invention, a plurality of the adhesives (95) are arranged in parallel in a state of being spaced apart by a predetermined interval in the radial direction on the inner side surface (91ca) of the slinger (90). It is characterized by being applied.

  In the sealing device (1) according to one aspect of the present invention, the adhesive (95) is coated in a plurality of states on the inner surface (91ca) of the slinger (90). To do.

  In the sealing device (1) according to one aspect of the present invention, the adhesive is a microcapsule adhesive.

  In the sealing device (1) according to an aspect of the present invention, the microcapsule adhesive (95) is formed by the slinger with a jig (100) in surface contact with the outer surface (56a) of the flange portion (56). The microcapsule is crushed by the force when (90) is pressed, and the slinger (90) and the flange portion (56) are bonded and fixed.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing device which can ensure sufficient airtightness without being influenced by the dimensional accuracy at the time of manufacture is realizable.

It is sectional drawing in the cross section along the axis line which shows the state with which the sealing device which concerns on embodiment of this invention was attached to the hub bearing. It is an enlarged view in the section along the axis which shows the schematic structure of the sealing device concerning an embodiment of the invention. It is a partial expanded sectional view with which it uses for description which pushes in the slinger of the sealing device which concerns on embodiment of this invention. It is an external appearance perspective view which shows the structure of the slinger of the sealing device which concerns on other embodiment of this invention. It is sectional drawing in the cross section along the axis line which shows schematic structure of the conventional sealing device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view taken along an axis showing a state where the sealing device 1 according to the embodiment of the present invention is attached to the hub bearing 50. FIG. 2 is an enlarged view in a section along the axis showing a schematic configuration of the sealing device 1 according to the embodiment of the present invention. FIG. 3 is a partially enlarged cross-sectional view for explaining the pushing of the slinger 90 of the sealing device 1 according to the embodiment of the present invention.

  The hub bearing 50 is a hub bearing that rotatably supports wheels in, for example, an automobile. In FIG. 1, the sealing device 1 is illustrated as being attached to the hub bearing 50.

  Hereinafter, for convenience of explanation, in FIG. 1 to FIG. 3, the outer side is the arrow a direction in the axis x direction, and the inner side is the arrow b direction in the axis x direction. That is, the outside is a side facing the outside of the hub bearing 50 and a side facing the atmosphere where foreign substances are present. The inner side is a side facing the inner side of the hub bearing 50 and a side facing the annular space 5a. In a direction perpendicular to the axis x (hereinafter, also referred to as “radial direction”), the direction away from the axis x (arrow c direction) is the outer peripheral side, and the direction approaching the axis x (arrow d direction) is the inner peripheral side. And

  As shown in FIG. 1, the hub bearing 50 includes an annular outer ring 51 as an outer peripheral member centering on an axis x, and an axis that is rotatable relative to the outer ring 51 and is partially surrounded by the outer ring 51. An annular hub 52 as an inner peripheral side member centering on x is provided, and a plurality of bearing balls 53 disposed between the outer ring 51 and the hub 52 are provided. Specifically, the hub 52 includes an inner ring 54 and a hub ring 55, and a wheel (not shown) is attached to a wheel mounting flange 56 of the hub ring 55 by a plurality of hub bolts 57.

  The outer ring 51 is a fixing member, and as shown in FIG. 2, an outer peripheral side (arrow c direction) surface (hereinafter also referred to as “outer peripheral surface”) 51 a and an inner peripheral side (arrow d direction). Surface (hereinafter also referred to as “inner peripheral surface”) 51b and an end surface (hereinafter referred to as “b” direction) that is flat along the direction orthogonal to the outer peripheral surface 51a and the inner peripheral surface 51b. "Inside end face") 51c.

  The hub wheel 55 is a rotating member having a wheel mounting flange 56 as a flange portion. The hub wheel 55 has an outer peripheral surface 55 a that faces the inner peripheral surface 51 b of the outer ring 51. The wheel mounting flange 56 of the hub wheel 55 is a portion extending from the inner end of the hub wheel 55 to the outer peripheral side (arrow c direction) in the radial direction (arrow cd direction). It has an outer surface (in the direction of arrow a) facing away from each other by a distance (hereinafter also referred to as “outer surface”) 56a.

  In the hub bearing 50, an annular space between the inner peripheral surface 51 b of the outer ring 51 and the outer peripheral surface 55 a of the hub ring 55, that is, between the outer ring 51 and the hub ring 55 (hereinafter also referred to as “annular space”). .) 5a, the sealing device 1 and the sealing device 60 are attached in a press-fit state. In the hub bearing 50, different sealing devices 1 and 60 are attached, but the two sealing devices 1 are attached both on the outer side (in the direction of arrow a) and on the inner side (in the direction of arrow b). It may be done.

  The sealing device 1 prevents the lubricant from leaking from the area of the annular space 5a in which the bearing balls 53 of the hub bearing 50 are provided, and foreign matter such as rainwater, muddy water, dust, etc. in the annular space 5a. Prevents intrusion from outside. In addition, although the structure of the sealing device 1 is demonstrated below, description is abbreviate | omitted about the structure of the sealing device 60 on account of description. As the sealing device 60, various known configurations can be used.

  As shown in FIG. 2, the sealing device 1 attached to the hub bearing 50 is attached to the sealing device body 70 attached to the outer ring 51, the outer peripheral surface 55 a of the hub wheel 55, and the outer surface 56 a of the wheel mounting flange 56. And a slinger 90.

  The sealing device body 70 is centered on an annular metal reinforcing ring 71 centering on the axis x and an axis x made of an elastic body integrally attached so as to cover the reinforcing ring 71 from the inside (in the direction of arrow b). And an annular elastic body portion 75.

  The reinforcing ring 71 reinforces the elastic body portion 75 and is manufactured by pressing or forging using a metal material. Examples of the metal material include stainless steel and SPCC (cold rolled steel).

  The reinforcing ring 71 includes a cylindrical cylindrical portion 71a positioned on the outermost peripheral side (arrow c direction), and a disk-shaped disk portion extending from the inner end of the cylindrical portion 71a to the inner peripheral side (arrow d direction). 71b. Specifically, the reinforcing ring 71 is formed so that the cylindrical portion 71 a is fitted to the inner peripheral surface 51 b of the outer ring 51. Further, the elastic body portion 75 is integrally attached to the disk portion 71b of the reinforcing ring 71 so as to cover from the inside (in the direction of arrow b).

  The reinforcing ring 71 is arranged in a molding die when the elastic body portion 75 is molded by crosslinking (vulcanization) molding. In the reinforcing ring 71, the elastic body portion 75 is integrally formed with the reinforcing ring 71 by bonding the elastic body portion 75 to the reinforcing ring 71 by cross-linking adhesion.

  Examples of the elastic body of the elastic body portion 75 include various rubber-like elastic members. The rubber-like elastic member is, for example, a synthetic rubber such as nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), or fluorine rubber (FKM). The elastic body portion 75 is molded by crosslinking (vulcanization) molding using a molding die.

  The elastic body portion 75 has a base portion 76, and has an outer peripheral side lip 77, an inner peripheral side lip 78, and a radial lip 79 as seal lips extending from the base portion 76.

  The outer peripheral side lip 77 is positioned on the outer peripheral side (arrow c direction) than the inner peripheral side lip 78, and the tip thereof extends inward (arrow b direction) from the base body portion 76. The outer peripheral side lip 77 abuts the outer surface 90a of the slinger 90 attached to the wheel mounting flange 56 with a predetermined tightening margin (contact width) at the tip thereof, and is the first seal in the elastic body portion 75. A lip is formed.

  The inner peripheral side lip 78 is located on the inner peripheral side (arrow d direction) than the outer peripheral side lip 77, and its distal end extends inward (arrow b direction) from the base portion 76. The inner peripheral side lip 78 abuts on the outer surface 90a of the slinger 90 attached to the wheel mounting flange 56 with a predetermined tightening margin at the tip thereof to form a second seal lip in the elastic body portion 75. doing.

  The radial lip 79 extends from the base portion 76 to the outside (in the direction of arrow a) and the inner peripheral side (in the direction of arrow d). The radial lip 79 abuts against a slinger cylindrical portion 91a (described later) of the slinger 90 with a predetermined margin at the tip thereof, and forms a third seal lip in the elastic body portion 75. As described above, the elastic body portion 75 includes at least one outer peripheral side lip 77 that abuts the slinger 90, the inner peripheral side lip 78, and the radial lip 79.

  The slinger 90 is made of metal, for example, stainless steel, and is a plate-like annular member centering on the axis line x. The slinger 90 is curved from the annular slinger cylindrical portion 91a centering on the axis line x fitted into the outer peripheral surface 55a of the hub wheel 55 and the inner end (in the direction of arrow b) of the slinger cylindrical portion 91a. An annular slinger arcuate portion 91b extending in the direction (arrow c direction) and an annular portion extending from the outer peripheral side (arrow c direction) end of the slinger arcuate portion 91b to the outer peripheral side (arrow c direction) end And a slinger ring portion 91c.

  The slinger ring portion 91c has an inner side surface 91ca that comes into surface contact with the outer side surface 56a of the wheel mounting flange 56, and a microcapsule type adhesive 95 is applied to almost all the region of the inner side surface 91ca. Specifically, the microcapsule type adhesive 95 is annularly applied in the circumferential direction on the inner side surface 91ca of the slinger annular portion 91c.

  The microcapsule type adhesive 95 is a liquid substance including a large number of microcapsules in which a liquid adhesive is sealed inside a spherical outer shell. Here, the microcapsule is a minute container in which a polymer or a film-forming substance is used as a wall film and a liquid or solid core substance is coated, and generally has a size of about 5 μm to 30 μm.

  The microcapsule type adhesive 95 has a structure in which the inner adhesive flows out to the outside when the outer shell is crushed and destroyed by the pressing force (for example, 0.5 to 10 MPa) at the time of pressure bonding. Have. Note that the microcapsule type adhesive 95 is not limited to a structure in which the outer shell is destroyed by the pressing force, but also has a structure in which it is destroyed at a temperature at the time of thermocompression bonding (for example, 60 to 120 degrees Celsius). It may be.

  The adhesive is not limited to the microcapsule adhesive 95, and other adhesives such as an anaerobic room temperature curable resin adhesive having rust prevention ability may be used. This anaerobic room temperature curable resin adhesive has a slow curing rate even when it is exposed to air. On the other hand, a portion such as a fitting surface that is not exposed to air cures relatively quickly even at room temperature. Therefore, it is not necessary to strongly press the inner side surface 91ca of the slinger ring portion 91c against the outer side surface 56a of the wheel mounting flange 56, and assemblability can be improved. As this anaerobic room temperature curable resin adhesive, for example, Loctite Refining Compound 680 (trade name) manufactured by Nippon Loctite Co., Ltd., Loctite 603 (trade name) or the like can be used.

  Next, a crimping method when the slinger 90 having such a configuration is fixed to the hub wheel 55 will be described. As shown in FIG. 3, in order to fix the slinger 90 to the hub wheel 55, first, the slinger cylindrical portion 91 a of the slinger 90 is fitted into the outer peripheral surface 55 a of the hub wheel 55. At that time, the slinger ring portion 91c is pushed inward (in the direction of the arrow b) with a pushing force P of 0.5 to 10 MPa with a predetermined jig 100 against the outer surface 56a of the wheel mounting flange 56.

  As a result, the microcapsules of the microcapsule type adhesive 95 applied to the inner side surface 91ca of the slinger ring portion 91c are crushed between the jig 100 and the outer side surface 56a of the wheel mounting flange 56, and the inner bonding is performed. The agent flows out. Thus, the gap between the inner side surface 91ca of the slinger ring portion 91c and the outer side surface 56a of the wheel mounting flange 56 in the slinger 90 is filled with the adhesive, and then the adhesive is cured, whereby the slinger ring portion 91c. Is bonded and fixed to the outer surface 56 a of the wheel mounting flange 56.

  Thus, the sealing device 1 can integrally fix the inner side surface 91ca of the slinger ring portion 91c and the outer side surface 56a of the wheel mounting flange 56 of the slinger 90 with the microcapsule type adhesive 95. Thus, since the slinger 90 can be bonded and fixed to the hub wheel 55, the slinger cylindrical portion 91a of the slinger 90 need not be fitted into the outer peripheral surface 55a of the hub wheel 55 with a predetermined compression allowance.

  As a result, in the sealing device 1, it is not necessary to strictly manage the dimensional accuracy at the time of manufacture so that the fitting force acts between the hub wheel 55 and the slinger 90, so that the hub wheel 55 is not affected by the dimensional accuracy at the time of manufacture. On the other hand, the slinger 90 can be fixed integrally.

  Further, since the sealing device 1 can fix the gap between the slinger ring portion 91c and the wheel mounting flange 56 in the slinger 90 without any gaps with the microcapsule adhesive 95 interposed therebetween, the foreign matter can be fixed between the slinger 90 and the wheel. Intrusion from the gap with the mounting flange 56 can be prevented in advance.

  Further, in the sealing device 1, the microcapsule type adhesive 95 is applied to the inner side surface 91ca of the slinger annular portion 91c. For this reason, the sealing device 1 has a wheel mounting flange 56 when the slinger ring portion 91c is pushed inward (in the direction of arrow b) as compared with the case where the microcapsule type adhesive 95 is applied to the inner peripheral surface of the slinger cylindrical portion 91a. Although it is easy for the adhesive to flow out to the outer peripheral side (in the direction of the arrow c), it can be prevented as much as possible from entering the bearing.

  Further, since the sealing device 1 can fix the slinger 90 and the wheel mounting flange 56 integrally, it is possible to prevent the slinger 90 from moving with respect to the hub wheel 55 due to vibration or the like.

  Thus, the sealing device 1 can ensure sufficient hermeticity without being affected by the dimensional accuracy at the time of manufacture, as compared with the related art.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the sealing device 1 according to the above-described embodiment, and all aspects included in the concept of the present invention and the claims. including. In addition, the respective configurations may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. For example, the shape, material, arrangement, size, and the like of each component in the above embodiment can be changed as appropriate according to the specific usage mode of the present invention.

  In the above-described embodiment, the case where the microcapsule type adhesive 95 is applied annularly in the circumferential direction on the inner side surface 91ca of the slinger ring portion 91c in the slinger 90 has been described. The invention is not limited to this, and as shown in FIG. 4, a plurality of microcapsule type adhesives 96 to 98 (in this state, the inner surface 91ca of the slinger ring portion 91c of the slinger 90 is spaced apart by a predetermined distance in the radial direction. In the case, for example, three), it may be applied in an annular shape in parallel.

  Further, in the above-described embodiment, the case where the microcapsule type adhesive 95 is applied annularly in the circumferential direction on the inner side surface 91ca of the slinger annular portion 91c in the slinger 90 has been described. The invention is not limited to this, and the slinger 90 may be applied in a state of being scattered in plural on the inner side surface 91ca of the slinger ring portion 91c.

  As described above, a plurality of microcapsule-type adhesives 95 are applied on the inner side surface 91ca of the slinger ring portion 91c in parallel with a predetermined distance in the radial direction, or in a state where the microcapsule type adhesives 95 are scattered in a plurality. When applied, since the amount of the microcapsule type adhesive 95 is small in the first place, it is possible to prevent the adhesive from overflowing even when the slinger ring portion 91c is pressed against the outer surface 56a of the wheel mounting flange 56. . In addition, the contact area between the microcapsule-type adhesive 95 and the outer surface 56a of the wheel mounting flange 56 is smaller than that in the embodiment, and the case is pushed in by the same pressing force as in the embodiment. Further, the pressing force per unit area of the contact portion between the microcapsule type adhesive 95 and the outer surface 56a is increased. Thus, even if the pressing force is lower than that in the embodiment, the slinger ring portion 91c and the wheel mounting The flange 56 can be easily bonded.

  The case where the sealing device of the present invention is used in a hub bearing of a vehicle or the like has been described. However, what uses the sealing device of the present invention is not limited to this, and can be used for industrial bearings, truck bearings, and the like.

1, 60, 120 Sealing device 5a Annular space 50, 110 Hub bearing 51, 111 Outer ring (outer member)
51a Outer peripheral surface 51b Inner peripheral surface 51c Inner end surface 52 Hub 53 Bearing balls 54, 112 Inner ring 55 Hub wheel (inner peripheral side member)
55a Outer peripheral surface 56 Wheel mounting flange (flange)
56a Outer side surface 57 Hub bolts 70, 130 Sealing device main bodies 71, 131 Reinforcement ring 71a Cylindrical part 71b Disk part 75, 132 Elastic body part 76 Base part 77, 132c Outer peripheral side lip (seal lip)
78, 132b Inner peripheral side lip (seal lip)
79, 132a Radial lip (seal lip)
90, 140 Slinger 90a Outer side surface 91a, 141 Slinger cylindrical part 91b Slinger arcuate part 91c Slinger annular part (outer peripheral end)
91ca Inner side surface 95 to 97 Microcapsule type adhesive 100 Jig 111 Outer ring 112a Outer peripheral surface 132c Outer peripheral side lip 142 Slinger disc portion 142a End portion 142ai Inner side surface 143 Slinger curved portion 144 Rubber x Axis

Claims (6)

A sealing device that seals between an annular outer peripheral member that can rotate relative to each other about an axis and an annular inner peripheral member that is at least partially surrounded by the outer peripheral member,
A sealing device body attached to the outer peripheral member;
A slinger attached to the outer surface of the flange portion extending from the inner end of the inner peripheral member to the outer peripheral side in the radial direction,
The sealing device body includes an annular reinforcing ring centered on the axis, and an annular elastic body portion centered on the axis composed of an elastic body attached to the reinforcing ring,
The elastic body portion has at least one seal lip that contacts the slinger,
The said slinger is provided with the adhesive agent apply | coated to the inner surface of the outer peripheral side edge part of the said slinger which surface-contacts with the said outer surface of the said flange part. The sealing device characterized by the above-mentioned. The sealing device according to claim 1, wherein the adhesive is applied annularly in a circumferential direction on the inner surface of the slinger. 2. The sealing device according to claim 1, wherein a plurality of the adhesives are applied in parallel in a state of being spaced apart by a predetermined distance in the radial direction on the inner surface of the slinger. The sealing device according to claim 1, wherein the adhesive is applied in a state of being scattered in plural on the inner surface of the slinger. The sealing device according to any one of claims 1 to 4, wherein the adhesive is a microcapsule adhesive. In the microcapsule type adhesive, the microcapsule is crushed by a force when the slinger is pressed by a jig that comes into surface contact with the outer surface of the flange portion, and the slinger and the flange portion are bonded and fixed. The sealing device according to claim 5.

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