JP3853652B2 - Door-to-door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door wheel used for, for example, a suspension type automatic door.
[0002]
[Prior art]
For example, as shown in FIGS. 6 and 7, a door cart used for an automatic door includes a door wheel body 47 that is rotatably supported by a support shaft 50 via a bearing 49.
In this type of conventional door, the door body 47 is formed of one kind of synthetic resin such as nylon or polyacetal as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, in such a conventional door, if the door body 47 is made of a hard synthetic resin in order to prevent the door body 47 from being worn, the shock absorption property is impaired and the impact during rolling cannot be absorbed. The impact was transmitted to the door, making it easy to damage. From this point, there was a problem that the life of the door roller was shortened.
In addition, if the door body 47 is made of a soft synthetic resin in order to improve the shock absorption, it becomes easy to wear during rolling, and this causes a problem that the life of the door wheel is shortened.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a door wheel that has improved wear resistance and shock absorption during rolling to extend its life.
[0005]
[Means for Solving the Problems]
The technical means for the present invention to solve the above problem is that in the fishing type door wheel 15 having the ring body 18 rotatably supported by the support shaft 23 via the bearing 20, the support shaft 23 At least a pair of the bearings 20 that are separated from each other in the axial direction of the support shaft 23 is provided, the ring body 18 is formed of a soft material, and is externally fitted to the pair of bearings 20, and the ring body 18 that is externally fitted to the bearing 20. The outer cylinder body 19 formed of a hard material harder than the ring body 18 is externally fitted, and the ring body 18 when an impact is applied between the ring body 18 and the support shaft 23 is elastic in the radially inward direction. This is in that a gap 26 to be deformed is provided.
[0006]
As another technical means in the present invention, a concave portion 35 is formed on the outer peripheral surface of the ring body 18, and a convex portion 34 that fits into the concave portion 35 of the ring body 18 is formed on the inner peripheral surface of the outer cylindrical body 19. The ring body 18 and the outer cylinder body 19 are integrated by inserting the ring body 18 from one end opening of the outer cylinder body 19 and fitting the concave portion 35 and the convex portion 34.
According to another technical means of the present invention, the outer cylinder body 19 is made of stainless steel or aluminum, the ring body 18 is made of an elastic material such as rubber, and the outer cylinder body 19 has a hardness of Beakers hardness. The rubber hardness of the ring 18 is 60 degrees in terms of Olsen hardness.
[0007]
DETAILED DESCRIPTION OF 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 cart in the present invention.
FIG. 4 shows an example of an automatic door opening / closing device using a door wheel in the present invention. The door main body 16 is attached to a door opening / closing driving belt 7 wound around a pair of driving pulleys 5 and driven pulleys 6. It is attached and opens and closes by forward / reverse operation of the drive pulley 5. The drive pulley 5, the driven pulley 6 and the door opening / closing drive belt 7 are housed in a mechanism housing case 11 extending in the door opening / closing direction together with a drive unit 9 mainly composed of an electric motor and a speed reduction mechanism.
[0008]
As shown in FIG. 3, a plurality of door wheels 15 are provided on the upper portion of the door body 16. More specifically, two door wheels 15 are made into one set, and two sets are provided separately on the left and right at the upper part of the door body 16. The door wheel 15 is attached to the upper part of the door main body 16 via connecting members 29 and 30.
FIG. 1 is a view of the upper structure of an automatic door opening / closing device as viewed from the door opening / closing direction.
As shown in FIG. 1, a metal door suspension 2 is provided on the mounting wall 1 along the door opening / closing direction, and a traveling rail 3 for rolling a door wheel 15 is provided on the door suspension 2. Is provided along the door opening and closing direction, like the door suspension 2.
[0009]
The door body 16 connected to the door wheel 15 can be freely opened and closed by the door wheel 15 reciprocatingly rolling the running rail 3 in the door opening / closing direction.
As shown in FIG. 2, the door wheel 15 includes a door wheel body 17 that is rotatably supported by a support shaft 23 via a bearing 20, and the door wheel body 17 is rotatably attached to the support shaft 23 via a bearing 20. A ring body 18 fitted and an outer cylinder body 19 fitted over the ring body 18 are provided.
The ring body 18 is formed of a soft material, and the outer cylinder body 19 is formed of a hard material 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.
[0010]
A shaft insertion hole 25 for inserting the support shaft 23 is provided inside the ring body 18 along the rotation axis direction of the door wheel 15.
A pair of bearings 20 are provided apart from each other in the axial direction of the support shaft 23. A clearance 26 is provided between the ring body 18 and the support shaft 23 between the pair of bearings 20, and the door body 17 is deformed by the drag received from the traveling rail 3 as indicated by an arrow F during rolling. However, at this time, as shown by a two-dot chain line in FIG. 2, the ring body 18 can be easily elastically deformed radially inward within the gap 26.
[0011]
The hardness of the material of the outer cylinder 19 is preferably a Vickers hardness of Hv 120 or higher, more preferably a material in the range of Hv (Vickers hardness) 120 to 260. Further, the hardness of the rubber material used for the ring body 18 is desirably a hardness of about 60 degrees Ho (Olsen hardness).
A retaining ring 27 for preventing the door body 17 from coming off the support shaft 23 is provided on the distal end side of the support shaft 23. More specifically, a fitting groove 36 for fitting the retaining ring 27 is provided around the supporting shaft 23 on the distal end side of the supporting shaft 23, and the retaining ring 27 is fitted into the fitting groove 36. Accordingly, the door body 17 is prevented from being detached from the support shaft 23.
[0012]
Reference numeral 21 denotes a rolling surface that rolls in contact with the traveling rail 3. The rolling surface 21 is formed by providing a curved surface that is recessed inward by recessing the outer surface of the outer cylindrical body 19 over the entire circumference of the outer cylindrical body 19. By forming the rolling surface 21, the door wheel 15 is not removed from the traveling rail 3.
When the rolling surface 21 is thus formed, a convex portion 34 projecting inward is formed on the inner surface of the outer cylinder 19 at a position corresponding to the rolling surface 21.
Further, a concave portion 35 into which the convex portion 34 is fitted when the outer cylindrical body 19 is externally fitted to the annular body 18 is formed on the outer surface of the annular body 18 over the entire circumference of the annular body 18.
[0013]
Fitting recesses 24 for fitting the bearings 20 are formed at both ends of the ring body 18 in the axial direction, and each of the pair of bearings 20 is fitted into the fitting recesses 24 so that the ring bodies are fitted. 18 is fixed.
The outer cylinder body 19 is externally fitted to the ring body 18 as follows.
That is, as shown in FIG. 5, the ring body 18 is inserted from one end opening of the outer cylinder body 19, and the axial end edge 32 of the ring body 18 abuts against the convex portion 34 formed on the inner surface of the outer cylinder body 19. By the way, the ring body 18 is further pushed in so that the end edge portion 32 gets over the convex portion 34 while being elastically deformed, and the convex portion 34 and the concave portion 35 of the ring body 18 are fitted.
[0014]
Thus, when the convex part 34 and the recessed part 35 are fitted, the outer cylinder body 19 will be externally fitted so as not to come off the ring body 18.
According to the embodiment of the door wheel 15 in the present invention described above, the outer cylindrical 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 wheel shown in FIG. Abrasion resistance during rolling is improved and wear becomes difficult. Thereby, the lifetime of the door wheel 15 can be extended.
Further, since the elastic body (soft material) is used for the ring body 18, it is easy to absorb the impact applied at the time of rolling, and the ring body 18 between the pair of bearings 20 and the support shaft 23. By providing the gap 26 therebetween, when an impact is applied during rolling, the ring body 18 is easily elastically deformed radially inward within the range of the gap 26, so that the shock absorption is greatly improved. Can be made. As a result, the bearing 20 is less likely to be damaged, and the life of the door wheel 15 can be extended here.
[0015]
In other words, the shock absorber is improved by forming the ring body 18 externally fitted to the support shaft 23 via the bearing 20 from a soft material that easily absorbs the impact received during rolling, and By forming the outer cylinder body 19 fitted on the ring body 18 with a hard material harder than the ring body 18, it is possible to improve the wear resistance. Here, the door wheel 15 has a wear resistance during rolling. And the shock absorption can be improved at the same time.
The present invention is not limited to the embodiment described above, and various modifications are possible as follows.
[0016]
The door cart in the present invention is not limited to the automatic door opening and closing device, and can be implemented for various conventional suspension type retractable doors.
The outer cylinder 19 may be made of a hard material other than metal, for example, a material such as hard synthetic resin.
A material other than the elastic material may be used for the ring body 18, for example, a material such as a soft synthetic resin may be used.
The number of door wheels 15 provided on the door body 16 may be freely determined according to the shape, structure, etc. of the door body 16.
[0017]
The bearings 20 attached to the door wheel 15 may be at least a pair, and may be a plurality of two or more pairs of three or more.
[0018]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the wearer which improved the abrasion resistance and impact absorbency at the time of rolling, and extended the lifetime can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram showing a use state of a door cart in the present invention.
FIG. 2 is a cross-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 cart according to the present invention is attached to the door body.
FIG. 4 is a perspective view showing an automatic door opening and closing device in which a door cart according to the present invention is incorporated.
FIG. 5 is a view showing a state where an outer cylindrical body 19 is fitted on a ring body 18;
FIG. 6 is a partial cross-sectional view showing a use state of a conventional door cart.
FIG. 7 is a cross-sectional view showing the internal structure of a conventional door roller.
[Explanation of symbols]
15 door wheel 17 door wheel body 18 ring body 19 outer cylinder body 20 bearing 23 support shaft 26 gap

Claims (3)

In a fishing door wheel (15) having a ring body (18) rotatably supported by a support shaft (23) via a bearing (20),
The support shaft (23) is provided with at least a pair of bearings (20) that are spaced apart from each other in the axial direction of the support shaft (23), and the ring body (18) is formed of a soft material so that the pair of bearings ( 20), an outer cylinder (19) formed of a hard material harder than the ring (18) is fitted on the ring (18) fitted on the bearing (20), and the ring ( A door wheel characterized in that a gap (26) for elastically deforming the ring body (18) when an impact is applied is provided between the support shaft (23) and the support shaft (23).   A concave portion (35) is formed on the outer peripheral surface of the annular body (18), and a convex portion (34) that fits into the concave portion (35) of the annular body (18) is formed on the inner peripheral surface of the outer cylindrical body (19). The ring body (18) and the outer cylinder are inserted by inserting the ring body (18) from one end opening of the outer cylinder body (19) and fitting the concave portion (35) and the convex portion (34). A door roller according to claim 1, characterized in that the body (19) is integrated. The outer cylinder (19) is made of stainless steel or aluminum, the ring body (18) is made of an elastic material such as rubber, and the hardness of the outer cylinder (19) is 120 or more in terms of Beakers hardness. The door wheel according to claim 1 or 2, wherein the hardness of the rubber of the ring body (18) is 60 degrees in terms of Olsen hardness.

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