JP2003200701A - Sash roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sash roller capable of extending the life by improving the wear resistance and the impact absorbing performance in rolling. <P>SOLUTION: The sash roller body 17 comprises a ring body 18 set in a support shaft 23 rotatably from outside via a bearing 20 and an outer cylindrical body 19 set in the ring body 18 from outside. The ring body 18 is made of a soft material, and the outer cylindrical body 19 is made of a hard material harder than the ring body 18. <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 door roller used for a hanging automatic door, for example.

[0002]

2. Description of the Related Art For example, a door roller used for an automatic door is
As shown in FIG. 6 and FIG.
There is one that includes a door roller body 47 that is rotatably supported. In this type of conventional door roller, the door roller main body 47 is formed of one kind of synthetic resin such as nylon or polyacetal as shown in FIG.

[0003]

However, in such a conventional door roller, in order to prevent wear of the door roller main body 47,
When the door roller main body 47 is made of a hard synthetic resin, the impact absorbing property is impaired, the impact at the time of rolling cannot be absorbed, the impact is transmitted to the bearing 49, and the bearing 49 is easily damaged, which shortens the life of the door roller. The problem arises. Further, if the door roller main body 47 is made of a soft synthetic resin in order to improve shock absorption, the door roller body 47 is easily worn during rolling,
From this point, there was a problem that the life of the door roller was shortened.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a door roller having improved wear resistance and shock absorption during rolling to extend its life.

[0005]

The technical means for solving the above problems according to the present invention is a support shaft 2 via a bearing 20.
A door roller 1 including a door roller main body 17 rotatably supported by 3
5, the door roller main body 17 includes a ring member 18 rotatably fitted on a support shaft 23 via a bearing 20, and a ring member 18.
The outer cylinder body 19 is fitted to the outer cylinder body 19, and the ring body 18 is made of a soft material, and the outer cylinder body 19 is made of a hard material harder than the ring body 18. According to another technical means of the present invention, at least one pair of the bearings 20 are provided apart from each other in the axial direction of the support shaft 23, and a gap is provided between the ring body 18 and the support shaft 23 between the pair of bearings 20. It is in the point provided.

Another technical means in the present invention is that the outer cylinder 19 is made of stainless steel or aluminum, and the ring 18 is made of an elastic material such as rubber.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an example of an embodiment of a door roller according to the present invention. FIG. 4 shows an example of an automatic door opening / closing device in which the door roller according to the present invention is used. The door body 16 includes a door opening / closing drive belt 7 wound around a pair of drive pulleys 5 and driven pulleys 6. It is attached and opens / closes by the forward / reverse operation of the drive pulley 5. The drive pulley 5 and the driven pulley 6
The door opening / closing drive belt 7 is housed in a mechanism unit storage case 11 extending in the door opening / closing direction together with a drive unit 9 mainly including an electric motor and a speed reduction mechanism.

As shown in FIG. 3, the door roller 15 includes a door body 1
A plurality of them are provided on the upper part of 6. More specifically, door car 1
Two sets of two are provided in the upper portion of the door body 16 so as to be divided into right and left. The door roller 15 includes a connecting member 2
It is attached to the upper part of the door body 16 via 9, 30. FIG. 1 is a view of the upper structure of the automatic door opening / closing device as viewed from the door opening / closing direction. As shown in FIG. 1, the mounting wall 1
Is provided with a metal door suspension part 2 along the door opening / closing direction, and a traveling rail 3 for rolling the door roller 15 is provided along the door opening / closing direction along the door opening / closing direction. Is provided.

When the door roller 15 reciprocally rolls on the traveling rail 3 in the door opening / closing direction, the door body 16 connected to the door roller 15 can be opened / closed. As shown in FIG.
Includes a door roller main body 17 rotatably supported by a support shaft 23 via a bearing 20, and the door roller main body 17 includes the bearing 20
A ring body 18 rotatably fitted onto a support shaft 23 via
And an outer cylinder body 19 fitted onto the ring body 18. The ring body 18 is formed of a soft material, and the outer cylinder body 1
9 is made of a hard material that is harder than the ring body 18. More specifically, the outer cylinder body 19 is made of stainless steel or aluminum, and the ring body 18 is made of an elastic material such as rubber.

A shaft insertion hole 25 for inserting the support shaft 23 is provided inside the wheel body 18 along the rotation axis direction of the door roller 15. A pair of bearings 20 are provided so as to be separated from each other in the axial direction of the support shaft 23. These pair of bearings 20
A gap 26 is provided between the wheel body 18 and the support shaft 23 between them, and when rolling, the traveling rail 3 as indicated by an arrow F is shown.
The door roller main body 17 is deformed by the drag force received from the wheel body 18, but at this time, the ring body 18 is easily elastically deformed inward in the radial direction within the range of the gap 26 as shown by the chain double-dashed line in FIG. You can do it.

The hardness of the material of the outer tubular body 19 is preferably a Vickers hardness of Hv 120 or more, more preferably a material having a Hv (Vickers hardness) of 120 to 260. Further, the hardness of the rubber material used for the wheel body 18 is preferably Ho (Olsen hardness) of about 60 degrees. At the tip end side of the support shaft 23, the door roller main body 17 is provided with the support shaft 2
A retaining ring 27 is provided to prevent the retaining ring 27 from coming off. More specifically, a fitting groove 36 for fitting the retaining ring 27 is provided around the supporting shaft 23 on the tip side of the supporting shaft 23, and the retaining ring 27 is fitted into the fitting groove 36. As a result, the door roller main body 17 is supported by the support shaft 2
It is designed so that it cannot be removed from 3.

Reference numeral 21 denotes a rolling surface that rolls in contact with the traveling rail 3. The rolling surface 21 is formed by recessing the outer surface of the outer tubular body 19 and providing a curved surface that is recessed inward over the entire circumference of the outer tubular body 19. By forming the rolling surface 21, the door roller 15 is prevented from derailing from the traveling rail 3. When the rolling surface 21 is formed in this manner, an inwardly projecting convex portion 34 is formed on the inner surface of the outer tubular body 19 at a position corresponding to the rolling surface 21. Further, on the outer surface of the ring body 18, a concave portion 35 into which the convex portion 34 fits when the outer cylinder body 19 is fitted onto the ring body 18 is formed over the entire circumference of the ring body 18.

Bearings 2 are provided at both axial ends of the ring body 18.
A fitting recess 24 for fitting 0 is formed, and each of the pair of bearings 20 is fixed to the wheel body 18 by fitting into the fitting recess 24. Outer cylinder 19
Is fitted onto the ring body 18 as follows. That is, FIG.
As shown in, the ring body 18 is inserted from one end opening of the outer cylinder body 19, and when the axial end edge portion 32 of the ring body 18 abuts on the convex portion 34 formed on the inner surface of the outer cylinder body 19, The ring member 18 is further pushed in so that the portion 32 elastically deforms and rides over the protrusion 34, and the protrusion 34 and the ring member 18 are
And the concave portion 35 of.

When the convex portion 34 and the concave portion 35 are fitted to each other in this manner, the outer tubular body 19 is externally fitted and attached so as not to come off from the ring body 18. According to the above-described embodiment of the door roller 15 of the present invention, the outer cylinder body 19 that comes into contact with the traveling rail 3 is formed of stainless steel or aluminum having a higher hardness than the conventional door roller shown in FIG.
Wear resistance during rolling is improved, making it less likely to wear. As a result, the life of the door roller 15 can be extended. Further, since the rubber material (soft material) having elasticity is used for the ring body 18, it becomes easy to absorb the impact applied during rolling, and the ring body 18 and the support shaft 23 between the pair of bearings 20 are separated from each other. Since the gap 26 is provided between the ring body 18 and the ring body 18 when the impact is applied during rolling,
Within this range, elastic deformation is likely to occur radially inward, so shock absorption can be greatly improved. As a result, the bearing 20 is less likely to be damaged, and the life of the door roller 15 can be extended.

In other words, the shock absorbing property is improved by forming the ring member 18 fitted on the support shaft 23 via the bearing 20 from a soft material that easily absorbs the shock received during rolling. By making the outer cylinder body 19 fitted on the ring body 18 from a hard material harder than the ring body 18, wear resistance can be improved.
Can simultaneously improve the wear resistance during rolling and the shock absorption. The present invention is not limited to the above-described embodiment, and various modifications can be made as follows.

The door roller according to the present invention is not limited to the automatic door opening / closing device, but can be applied to various conventional retractable retractable doors. A hard material other than metal may be used for the outer cylinder body 19, and for example, a material such as hard synthetic resin may be used. A material other than an elastic material may be used for the ring body 18, and for example, a material such as soft synthetic resin may be used. The number of door wheels 15 provided in the door body 16 is the door body 1
It may be freely determined according to the shape, structure, etc. of 6.

The bearing 20 attached to the door roller 15 may be at least one pair, and may be a plurality of three or more and a plurality of pairs of two or more.

[0018]

According to the present invention, it is possible to provide a door roller having improved wear resistance and shock absorption during rolling and a longer life.

[Brief description of drawings]

FIG. 1 is a diagram showing a use state of a door roller according to the present invention.

FIG. 2 is a sectional view showing the internal structure of the door roller according to the present invention.

FIG. 3 is a perspective view showing a state in which the door roller according to the present invention is attached to a door body.

FIG. 4 is a perspective view showing an automatic door opening / closing device in which the door roller according to the present invention is incorporated.

FIG. 5 is a view showing a case where an outer cylinder body 19 is fitted onto a ring body 18.

FIG. 6 is a partial cross-sectional view showing a usage state of a conventional door roller.

FIG. 7 is a sectional view showing an internal structure of a conventional door roller.

[Explanation of symbols]

15 door car 17 Door car body 18 wheels 19 outer cylinder 20 bearings 23 Support shaft 26 Gap

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takahiro Hara             404-1 Nishinosue, Himeji City, Hyogo Prefecture Ikeda Electric Co., Ltd.             Inside the company F-term (reference) 2E034 CA01

Claims (3)

[Claims] 1. A door roller (15) comprising a door roller body (17) rotatably supported by a support shaft (23) through a bearing (20), wherein the door roller body (17) comprises a bearing (20). A ring body (18) rotatably fitted on the support shaft (23) via an outer cylinder body (19) fitted on the ring body (18). A door roller made of a soft material, wherein the outer cylinder body (19) is made of a hard material harder than the ring body (18). 2. The bearing (20) is provided at least in a pair in the axial direction of the support shaft (23) so as to be separated from each other, and the ring body (18) and the support shaft (23) between the pair of bearings (20) are provided. The door roller according to claim 1, wherein a gap (26) is provided between the doors. 3. The outer cylinder body (19) is made of stainless steel or aluminum, and the ring body (18) is made of an elastic material such as rubber. Door car described in.