JP2003239946A - Support roller for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support roller for a sliding door in which enlargement of life of the roller is made compatible with simplification of a vehicle manufacturing process by improving thermal resistance of a resin made outer skin. <P>SOLUTION: The resin made outer skin 3 is integrally formed with an outer ring 5 by using a synthetic resin material having a melting point of 200 degrees C or more on an outer peripheral surface 5a of the outer ring 5 of the support roller 1 to be mounted on the sliding door. In this constitution, thermal resistance of the support roller 1 is improved and to deformation of the outer skin 3 even in a hot temperature state is prevented. Consequently, this support roller 1 passes an oven with which a coating line, etc., are furnished as it is mounted on a car body through the sliding door, and the body and the sliding door is simultaneously coated in the vehicle manufacturing process. Creeping resistance against a load of the support roller 1 and durability against abrasion, impact, etc., are also improved when the outer skin 3 is formed by using resin excellent in mechanical characteristics at high temperature. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support roller used for a sliding door of an automobile or the like, and more specifically,
The present invention relates to a support roller for a slide door that has excellent heat resistance and durability.

[0002]

2. Description of the Related Art A RV (recreation vehicle) such as a van type vehicle uses a side doorway that is opened and closed by a slide door to get in and out of the rear half of the vehicle. Normally, in a sliding door, support rollers attached to the upper and lower edges and an intermediate position of the door body roll on guide rails provided on the vehicle body side to smoothly open and close the door. Has become. This support roller is composed of a ball bearing attached to a support shaft provided on the slide door, and the outer peripheral surface of the ball bearing in contact with the guide rail is protected by rolling of the roller when the door is opened or closed and vibration during traveling. In order to reduce the metallic noise generated, a synthetic resin outer cover is integrally molded.

Since the synthetic resin outer cover of such a sliding door supporting roller reciprocates on the guide rail while receiving the weight of the door body, it has creep resistance against load and mechanical characteristics against wear and impact. Needed. In order to improve the durability of this synthetic resin outer skin, Japanese Patent Application Laid-Open No. 8-
As in Japanese Patent No. 276743 and Japanese Patent Application Laid-Open No. 11-334369, an outer ring having a groove in the circumferential direction on the outer peripheral surface is used, and a synthetic resin outer cover is integrally formed so as to fill the groove. It has been proposed to form a portion and a thick portion and change a portion that supports a load when the sliding door is opened and closed to improve creep resistance.

[0004]

By the way, in the above-mentioned sliding door supporting roller, the heat resistance of the resin outer cover integrally formed on the outer peripheral surface of the outer ring sometimes becomes a problem. The outer cover of a conventional supporting roller is often formed of a resin material having good workability such as polyacetal, and when exposed to a high temperature of about 200 ° C., the resin softens and deforms. For this reason, it was impossible to pass through such an oven as a vehicle manufacturer's coating line had with the supporting roller attached to the vehicle body.

When such a support roller is used, it is necessary to attach the support roller after coating and drying both the body and the slide door, which causes the trouble of coating the body and the slide door in separate steps. .

The present invention has been made in view of the above circumstances, and by improving the heat resistance of a resin outer cover, a slide that can simultaneously realize a long life of a roller and simplification of a vehicle manufacturing process is provided. It is intended to provide a support roller for a door.

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 has an inner ring attached to a support shaft provided on a sliding door of a vehicle, a rotatable outer ring, and these. For a sliding door that has a ball arranged between the inner and outer rings and a synthetic resin outer cover that is integrally covered on the outer ring outer periphery side and that rolls on a guide rail provided on the vehicle body and supports the slide door. In the supporting roller, the outer cover made of synthetic resin is formed by using a synthetic resin material having a melting point of 200 ° C. or higher.

Here, the synthetic resin material used for the outer skin is selected from the group consisting of polyamide 4-6, polyamide 6-6, polybutylene terephthalate, polyphthalamide, polyphenylene sulfide, polyether ether ketone and polyimide resin. The resin material described above can be preferably used.

According to the present invention, in a supporting roller having a synthetic resin outer cover used for a sliding door of an automobile or the like, the resin outer cover is formed of a resin material having high temperature resistance. Is to achieve.

That is, according to the first aspect of the present invention, a resin outer cover is integrally formed with the outer ring on the outer peripheral surface of the outer ring of the support roller attached to the slide door by using a synthetic resin material having a melting point of 200 ° C. or higher. With this configuration, the heat resistance of the entire support roller can be improved. Also,
This support roller can be passed through an oven provided in a painting line or the like while being attached to the vehicle body.
Therefore, the sliding door support roller of the present invention makes it possible to simultaneously coat the body and the sliding door in one step in the manufacturing process of a vehicle or the like, thereby reducing the number of process steps.

According to the second aspect of the present invention, the resin used for the outer shell is made of polyamide 4-6, polyamide 6-6, polybutylene terephthalate, polyphthalamide, polyphenylene which is excellent in mechanical properties at high temperature. If selected from the group consisting of sulfide, polyetheretherketone and polyimide resin, it is possible to improve the creep resistance against load of the slide roller supporting roller and the durability against abrasion or impact, which is preferable.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an axial sectional view showing a first embodiment of a sliding door support roller of the present invention, and FIG. 2 is an axial sectional view showing a second embodiment. These supporting rollers are composed of a ball bearing 2 fixed to a support shaft 10 and an outer cover 3 made of synthetic resin integrally formed on the outer circumference of the ball bearing 2.

The ball bearing 2 is an inner ring 4 fixed to the support shaft 10.
And an outer ring 5 rotatably arranged, a plurality of balls 7, 7, ... Arranged in an annular space 6 formed between the inner ring 4 and the outer ring 5, and holding these balls 7. It is composed of a cage 8. On the outer peripheral surface of the outer ring 5, a circumferential groove 5a is formed at a substantially central portion in the axial direction, and a synthetic resin outer skin 3 is integrally formed in a circumferential shape so as to fill the groove 5a. There is. Further, in order to prevent dust and water from entering both ends of the annular space 6 and prevent leakage of a lubricant (not shown) sealed in the annular space 6, a hermetic seal 9 is provided. , 9 are attached.

The support roller 1 having the above-mentioned structure is attached to a predetermined position of the slide door via the support shaft 10, and is fitted into a guide rail (not shown) provided on the vehicle body side to make the rail. Will roll over. Also,
With this support roller 1 attached to the slide door,
When the door is closed, it is inclined with respect to the receiving surface of the guide rail, the load of the door body is received by the thin portion located at the axial end of the outer cover 3, and when the door is opened, it stands upright with respect to the receiving surface of the rail. The door body is arranged so as to roll while receiving the load of the door body at a thick portion of the outer cover 3 located substantially in the center in the axial direction. Such an attachment method exhibits the effect of preventing the creep deformation of the outer cover 3.

The sliding door support roller 1 in this embodiment is characterized in that the outer cover 5 made of synthetic resin formed on the outer peripheral surface of the outer ring 5 is made of a synthetic resin material having a melting point of 200 ° C. or higher. It is a point that is molded integrally with. As such a synthetic resin agent, polyamide 4-6 (46P
A), polyamide 6-6 (66PA), polybutylene terephthalate (PBT), polyphthalamide (PP)
A), polyphenylene sulfide (PPS), polyether ether ketone (PEEK) or polyimide (PI) resin is used, and among them, polyamide 4-6 resin containing reinforcing fiber such as glass fiber is preferably adopted. As the reinforcing fiber contained in the resin, carbon fiber, aramid fiber or the like may be used in addition to glass fiber.

The amount of the reinforcing fiber added is preferably 20 to 60% by weight. When the amount of the reinforcing fiber added exceeds 60% by weight, poor kneading and deterioration of moldability occur, and when it is less than 20% by weight, the effect is small. If it is desired to further improve the wear resistance, a solid lubricant such as molybdenum disulfide (MoS ₂ ), polytetrafluoroethylene (PTFE), and graphite should be appropriately added to reduce the friction coefficient. You can also In this case, the amount of solid lubricant added is 5
-20% by weight is preferred. 20% by weight of lubricant
If it exceeds, the mechanical strength of the base material resin will decrease and
If less than, there is little effect.

With these configurations, the heat resistance of the support roller 1 can be improved, and the outer cover 3 can be prevented from being deformed even at a high temperature. Therefore, the support roller 1 remains attached to the vehicle body through the slide door,
It becomes possible to pass through an oven provided in a painting line or the like.

Further, by adopting polyamide 4-6, polyamide 6-6, polybutylene terephthalate, polyphthalamide, polyphenylene sulfide, polyether ether ketone or polyimide resin, which has excellent mechanical properties at high temperature, for the outer skin 3. As compared with the conventionally used resin, it is possible to improve the creep resistance against the load of the support roller 1 and the durability against wear or impact.

Next, a second embodiment of the present invention will be described. As shown in FIG. 2, the slide door support roller 11 in the second embodiment also has a ball bearing 2 fixed to the support shaft 10 as in the first embodiment.
And a shell 3 made of synthetic resin integrally formed on the outer periphery of the ball bearing 2. The difference from the first embodiment is that
The point is that two semicircular circumferential grooves 5b and 5c are provided on the outer peripheral surface of the outer ring 5. These circumferential grooves 5b and 5c are
The outer ring 5 is formed at a position outside the raceway surface 5x of the ball 7 in the axial direction.

The slide-door supporting roller 11 having the above-described structure also contacts the receiving surface of the guide rail provided on the vehicle body almost vertically when the sliding door is opened, and is inclined to the receiving surface of the guide rail when the door is closed. Contact. In this way, the support roller 11 has the circumferential groove 5 on the outer peripheral surface of the outer ring 5.
Since b and 5c are provided at positions axially outside of the raceway surface 5x, a sufficient distance (that is, thickness) from the bottom of the raceway surface 5x to the outer peripheral surface of the outer ring 5 can be ensured. The bearing capacity (static strength) can be improved. Further, when the door is closed, the load of the door body is received by the thin portion located at the axial end portion of the outer cover 3 as in the first embodiment, and thus the creep deformation of the outer cover 3 is prevented.

In the above embodiment, the slide door supporting roller provided with the ball bearing has been described as an example, but the bearing used in the present invention is not limited to this, and other rollers such as needle roller bearings may be used. It goes without saying that the structure of the outer cover can also be applied to the rolling bearing.

[0022]

As described above in detail, according to the supporting roller for a sliding door of the present invention, the heat resistance of the supporting roller as a whole is improved, and the supporting roller is allowed to pass through the oven provided in the coating line etc. while being attached to the vehicle body. It will be possible. Therefore, the sliding door support roller of the present invention makes it possible to simultaneously paint the body and the sliding door in the manufacturing process of a vehicle or the like, thereby reducing the number of manufacturing steps.

If the resin used for the outer cover is selected from the group consisting of polyamide 4-6, polyamide 6-6, polybutylene terephthalate, polyphthalamide, polyphenylene sulfide, polyether ether ketone, and polyimide resin, it slides. The creep resistance against load of the door support roller and the durability against wear and impact are improved, deterioration and dimensional change are small, and the life of the support roller can be extended.

[Brief description of drawings]

FIG. 1 is an axial cross-sectional view showing a slide door support roller according to a first embodiment of the present invention.

FIG. 2 is an axial sectional view showing a support roller for a slide door according to a second embodiment of the present invention.

[Explanation of symbols]

1,11 Support roller 2 ball bearings 3 outer skin 4 inner ring 5 outer ring 5a groove 5b, 5c circumferential groove 5x orbital plane 6 annular space 7 balls 8 cage 9 hermetic seal 10 spindles

Continued front page    F term (reference) 3J103 AA06 AA13 AA41 AA51 AA71                       BA15 CA02 CA25 CA35 DA05                       EA02 FA01 FA12 FA13 FA14                       FA15 FA21 GA65 HA04 HA13                       HA14 HA44 HA46

Claims (2)

[Claims] 1. An inner ring attached to a spindle provided on a sliding door of a vehicle, a rotatable outer ring, and
A support roller for a slide door, which includes a ball arranged between the outer rings and a synthetic resin outer cover that is integrally covered on the outer peripheral side of the outer ring and supports the slide door while rolling on a guide rail provided on the vehicle body. In the support door for a slide door, the outer cover made of synthetic resin is formed by using a synthetic resin material having a melting point of 200 ° C. or higher. 2. The synthetic resin shell is polyamide 4-
6, polyamide 6-6, polybutylene terephthalate,
The support roller for a slide door according to claim 1, wherein the support roller is formed of a resin material selected from the group consisting of polyphthalamide, polyphenylene sulfide, polyether ether ketone, and polyimide resin.