JP6831500B2 - Automatic door suspension - Google Patents

Description

The present invention relates to an automatic door suspension device that reduces the load on the door roller caused by rolling and tilting of the door roller when the door is opened and closed, and prevents an increase in running noise and damage to the door roller.

The automatic door is opened and closed by a drive mechanism located above the door.
This drive mechanism is composed of a drive pulley provided on the motor via a speed reducer, and a timing belt having the drive pulley as one end and a subordinate pulley at the other end and straddling between the two pulleys.

The door body is connected to this timing belt via a suspension device. The suspension device is equipped with a door roller having a concave groove formed on the outer peripheral surface.
Then, the door roller smoothly rotates on the rail having a convex shape provided on the rail portion attached to the wall surface to freely guide the opening and closing movement of the door. When the door roller smoothly rotates on the rail portion to open and close the door body in this way, the center of the concave groove of the door roller and the center of the convex rail portion are engaged with each other, and the door The weight of the main body is evenly distributed to the door wheels on the rails.

However, when the door body is subjected to external wind pressure, the difference between the internal and external pressures in the room, and the pressure due to the contact of obstacles from one direction, the door body shakes, and this shaking causes the shaft of the door roller that is opening and closing Deflection occurs. In addition, the rail portion attached to the wall surface is not a perfect straight line and is partially distorted or uneven. When the door roller travels on such a rail portion, misalignment occurs between the door roller and the shaft.
If the door body is opened and closed in an unreasonable state where the shaft is bent or misaligned, an unbalanced load will be applied to the door roller, causing wear and damage to the rotating parts of the door roller, and abnormal running noise. ..

As a means for solving this problem, in Document 1, the rail is engaged with the rail for the purpose of regulating the displacement of the door roller that occurs in the axial direction of the door roller, and the rail is sandwiched between both sides in the longitudinal direction and the orthogonal direction of the rail. It is described that a sliding body that slides along the rail is provided.
However, if such a method is used, the number of accessories to the suspension device increases, the device itself becomes complicated, and it takes time and effort for installation work and replacement of parts. Further, when a load is applied, the force acts directly on the sliding body and the rail portion, and if the door is repeatedly opened and closed in this state, wear or damage may occur.

Japanese Unexamined Patent Publication No. 2003-148038

The present invention reduces the load on the door roller caused by rolling when the door is opened and closed, prevents the increase in running noise, reduces the wear and tear of the door roller, and the device itself is a simple and easy-to-install automatic door. Suspension device is provided.

The automatic door suspension device according to the present invention includes a suspension frame 10 for suspending the door body 01 and a door roller support 20 equipped with the door roller 30, and the rail portion 50 in which the door roller 30 is arranged in the moving direction of the door body 01. In the suspension device that rolls on the door body 01 so as to open and close the door body 01, the door roller 30 has a rolling surface between the inner ring 42 having two rows of tracks and the outer ring 41 having a spherical track. It is characterized in that it is mounted on the fixed shaft 22 of the door roller support 20 via a bearing incorporating a shaped roller 45 .

In the shaft hole 34 of the door roller 30, the cavity i between the bearing 40 fitted in the shaft hole 34b and the stopper 47 for fixing the outer ring collar 43b of the bearing 40, and the shaft hole 34. A space i having a gap h between the outer diameter of the fixed shaft 22a of the penetrating door roller support 20 and the inner diameter of the shaft hole 34a of the door roller 30 and freely allowing the inclination of the inner ring 42 of the bearing 40. It is characterized by having and h.

The side surface 31a of the door roller 30 facing the door roller support 20 has a teaper-like shape from the outer circumference toward the center of the circle.

The shaft hole 34b of the door roller 30 into which the bearing 40 is fitted is closed with a flat plate of a disk having the same diameter as the bearing 40.

According to the invention of claim 1, the door main body is provided with a hanging frame for suspending the door main body and a door wheel support body equipped with a door wheel, and the door wheel is rolled on a rail arranged in the moving direction of the door body. In a suspension device that allows the door wheel to open and close freely, the door wheel has a bearing in which a roller having a rolling surface is incorporated between an inner ring having two rows of tracks and an outer ring having a spherical track. Since it is attached to the fixed shaft of the support, the centering function works and the door roller can be rotated even if the fixed shaft and the door roller are misaligned due to rolling of the door body during opening and closing movement or tilting of the door roller. Therefore, it is possible to prevent an increase in running noise and reduce wear and tear of the door roller.

According to the invention of claim 2, in the shaft hole of the door roller, a cavity between the bearing fitted in the shaft hole and the stopper for fixing the outer ring flange of the bearing, and the door wheel support penetrating into the shaft hole. There is a gap between the outer diameter of the fixed shaft of the body and the inner diameter of the shaft hole of the door roller, and there is a space that can freely allow the inclination of the inner ring of the bearing, so the door body rolls during opening and closing movement. When the fixed shaft and the door roller are misaligned due to the tilt of the door roller, the door roller can be rotated by allowing the inner ring and outer ring of the bearing attached to the fixed shaft of the door roller support to tilt. Since it can be supported, it is possible to prevent an increase in running noise and reduce wear and tear of the door roller.

According to the invention of claim 3, since the side surface of the door roller facing the door roller support has a teaper-like shape from the outer circumference toward the center of the circle, the door roller is caused by rolling of the door body during opening / closing movement. Even if the support is tilted or the door roller is tilted, contact between the door roller support and the side surface of the door roller can be prevented, and the door roller can be rotatably supported to prevent an increase in running noise, and the door roller is worn or damaged. Can be reduced.

According to the invention of claim 4, since the shaft hole of the door roller in which the bearing is fitted is closed with a flat plate of a disk having the same diameter as the bearing, dust is formed on the rolling surface in which the roller of the bearing is incorporated. It can prevent the intrusion of dust, maintain the smooth movement of the bearing, prevent the increase of running noise, and reduce the wear and damage of the door roller.

It is a front view which shows the structure of the automatic door of this invention. It is a front view which shows the suspension system. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is an exploded view which attaches the door roller to the door roller support of this invention. (A) is a side view of the door roller support, (b) is a vertical sectional view of the door roller, and (c) is a bearing and a stopper attached to a shaft hole of the door roller and a fixed shaft of the door roller support. It is a vertical cross-sectional view which attached the door roller to the door roller support. (A) is a vertical cross-sectional view of a bearing, and (b) is a vertical cross-sectional view showing an inclination between an inner ring and an outer ring of the bearing.

Hereinafter, embodiments of the automatic door suspension device according to the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 shows a configuration when the suspension device of the present invention is applied to an automatic door.
The automatic door suspension device of the present invention includes a pair of suspension frames 10 fixed to the door end side and the door tail side of the upper edge portion 02 of the door body 01, a door roller support 20 attached to the suspension frame 10, and a door roller support. It is composed of a door roller 30 mounted on the body 20 and a connecting portion 16 connecting the door roller supports 20 attached to the pair of suspension frames 10.

The connecting plate 17 of the connecting portion 16 is engaged with a timing belt 58 spanned between the driving pulley 56 and the driven pulley 57 via the belt connecting plate 18. Further, the suspension frame 10 is provided with a derailment prevention roller 13. A rail portion 50 is laid between the door roller 30 and the derailment prevention roller 13 along the opening / closing direction of the door body 01.
A convex rail 53 is formed on the rail portion 50, and the rolling surface 33 of the concave groove formed on the outer peripheral portion 32 of the door roller 30 rotates and moves along the rail 53.

As shown in FIGS. 2 and 3, the suspension frame 10 is a plate member composed of a bottom plate portion 11 and a vertical plate portion 12 having an L-shape when viewed from the side surface.
The hanging frame 10 is fixed to the door body 01 by inserting a bolt into a through hole 14 formed in the bottom plate portion 11 by abutting the lower surface of the bottom plate portion 11 against the upper edge portion 02 of the door body 01.
A plurality of female screw portions 15 for connecting to the door roller support 20 described later with bolts are formed in the central portion of the vertical plate portion 12 of the suspension frame 10.
Further, a derailment prevention roller 13 is attached to one end of the vertical plate portion 12 of the suspension frame 10.

A door roller support 20 is attached to the vertical plate portion 12 of the suspension frame 10.
As shown in FIG. 4A, the door roller support 20 is composed of a base portion 21 which is a rectangular plate material and a fixed shaft 22 attached to a substantially intermediate portion of the base portion 21.
A bolt through hole 28 is formed in the lower portion of the base portion 21 of the door roller support 20 at a position corresponding to the female screw portion 15 of the vertical plate portion 12 of the suspension frame 10.
If the female screw portion 15 of the vertical plate portion 12 of the suspension frame 10 and the through hole 28 of the base portion 21 of the door roller support 20 are aligned and bolts are inserted and screwed, the door roller support 20 is attached to the vertical plate portion 12 of the suspension frame 10. Can be fixed.

The fixed shaft 22 of the door roller support 20 is composed of a single shaft rod, and the third shaft portion 22c of the fixed shaft 22 is passed through a through hole 26 formed in a substantially intermediate portion of the base portion 21 of the door roller support 20. 3-axis part 22
The fixed shaft 22 can be fixed to the door roller support 20 by screwing the male screw portion 25 formed in c with the nut 27.

The fixed shaft 22 has a first shaft portion 22a in contact with the base portion 21, a second shaft portion 22b for attaching a bearing, and a third shaft portion 22c penetrating the through hole 26 of the base portion 21, each having a different shaft diameter. It is composed of a connecting wall 23 which is a partition wall of the first shaft portion 22a and the second shaft portion 22b.

The outer diameter of the first shaft portion 22a is larger than the outer diameter of the second shaft portion 22b, and the outer diameter of the second shaft portion 22b is adjusted so as to fit into the inner diameter of the bearing 40 to be attached.
Further, a ring-shaped first recess 29a for fitting the first stop ring 29b for fixing the bearing 40 is formed in the vicinity of the end of the outer peripheral surface 24b of the second shaft portion 22b. A door wheel 30 is mounted on a fixed shaft 22 which is a horizontal shaft via a bearing 40.

As shown in FIG. 4B, the door roller 30 has a shaft hole 34 formed in the central portion thereof, a concave groove rolling surface 33 formed in the outer peripheral portion 32, and one side surface 31a of the door roller 30 having an outer peripheral portion. It has a teaper-like shape with a gradient of an angle θ1 in the direction of the center of the circle from 32.
This is to avoid contact between the door roller support 20 and the door roller 30 when the fixed shaft 22 of the door roller support 20 is bent due to the rolling of the door body 01 or when the door roller 30 is tilted. ..

In the present invention, the angle of θ1 is set to 5 °, but the present invention is not limited to this, and it can be appropriately used in the range of an angle of 3 ° to 8 °. Here, the angle is set in the range of 3 ° to 8 ° because if it is less than 3 °, there is no effect of the gradient, and if it exceeds 8 °, the strength of the outer peripheral portion 32 of the door roller 30 is reduced.

The shaft hole 34 of the door roller 30 is a stepped hole, and is composed of a first shaft hole 34a, a second shaft hole 34b, and a bearing wall 35 which is a partition wall between the first shaft hole 34a and the second shaft hole 34b. A ring-shaped second recess 37 is formed on the inner peripheral surface 36b of the second shaft hole 34b.
The door roller 30 is mounted on a fixed shaft 22 with its side surface 31a having a teaper shape facing the door roller support 20.

As shown in FIG. 6A, the bearing 40 is a bearing in which a roller 45 having a rolling surface is incorporated between an inner ring 42 having two rows of orbits and an outer ring 41 having a spherical orbit. ..
Since the center of the outer ring raceway surface coincides with the bearing center, the bearing 40 has a self-aligning property and has a function of automatically adjusting the inclination of the inner ring 42 and the outer ring 41 caused by the misalignment of the shaft and the housing. ..
FIG. 6B shows the inclination θ2 generated between the inner ring 42 and the outer ring 41 of the bearing 40.

Here, the structure in which the door roller 30 is mounted on the fixed shaft 22 of the door roller support 20 via the bearing 40 and its operation will be described with reference to FIGS. 4, 5 and 6.

A bearing 40 is fitted in the second shaft hole 34b of the door roller 30, and the bearing 40 is fixed in the shaft hole 34 of the door roller 30 at a position where one of the outer ring collars 43a is in close contact with the bearing wall 35. .. Then, the fixed shaft 22 of the door roller support 20 is fitted into the shaft hole 34 of the door roller 30 to which the bearing 40 is attached. As a result, the second shaft portion 22b of the fixed shaft 22 is fitted to the inner ring 42 of the bearing 40, and the inner ring collar 44a of the bearing 40 is in close contact with the connecting wall 23 of the fixed shaft 22.
Further, the first stop ring 29b, which is a stopper, is fitted into the recess 29a formed near the end of the outer peripheral surface 24b of the second shaft portion 22b protruding from the inner ring 42 of the bearing 40 to press the inner ring collar 44b of the bearing 40. The bearing 40 is fixed to the second shaft portion 22b.

The other outer ring collar 43b of the bearing 40 is fixed by a second stop ring 47, which is a stopper, via a shim ring 46 for adjusting the gap. As described above, the bearing 40 is fitted into the second shaft hole 34b of the door roller 30, and the depth d of the second shaft hole 34b is larger than the width w of the bearing 40. Therefore, the bearing 40 is the second shaft. It is buried in the hole 34b.

The second recess 37 into which the second stop ring 47 for fixing the bearing 40 is fitted is formed on the inner peripheral surface 36b of the second shaft hole 34b at a certain distance from the outer ring collar 43b of the bearing 40.
A plurality of shim rings 46 having the same size as the outer ring collar 43b are superposed between the outer ring collar 43b of the bearing 40 and the second stop ring 47, and the bearing 40 is fixed in the second shaft hole 34b.

By interposing a shim ring 46, which is a clearance adjuster, between the outer ring collar 43b and the second stop ring 47, a cavity i formed by clearance adjustment is secured between the inner ring collar 44b of the bearing 40 and the second stop ring 47. can do. In the present invention, the width of the cavity i is set to 4 mm, and the size of the cavity i is determined by the number of overlapping shim rings 46, but the size is not limited to this.

The cavity i allows the inclination of the bearing 40 when the inner ring 42 and the outer ring 41 of the bearing 40 are inclined. Further, a part of the first stop ring 29b for fixing the bearing 40 to the second shaft portion 22b is also fitted into the first recess 29a formed near the end of the outer peripheral surface 24b of the second shaft portion 22b. The bearing is configured so as not to interfere with the occurrence of the above inclination.

Further, by forming one piece located outside the shim ring 46 into a disk having the same diameter as the bearing 40, the cavity i between the shim ring 46 and the bearing 40 can be closed. Especially in the case of an automatic door installed at the entrance / exit of a building, dust and dirt easily enter the rolling surface where the barrel-shaped roller 45 of the bearing 40 is incorporated, which hinders the automatic alignment function of the bearing 40. Will be the one to do. By making one piece located on the outside into a flat plate of a disk, it is possible to prevent dust and dirt from entering from the outside.

Further, the inner diameter of the first shaft hole 34a and the first shaft so that a gap h is formed between the inner peripheral surface 36a of the first shaft hole 34a of the door roller 30 and the outer peripheral surface 24 of the first shaft portion 22a of the fixed shaft 22. The door roller 30 is mounted on the fixed shaft 22 by adjusting the outer diameter of the portion 22a. The distance between the gaps h is the distance between the outer peripheral surface 24a of the first shaft portion 22a and the door roller 30 when the fixed shaft 22 of the door roller support 20 is bent due to the rolling of the door body 01 or when the door roller 30 is tilted. It suffices if a distance is secured so that the inner peripheral surface 36a of the first shaft hole 34a does not come into contact with each other. Therefore, this gap h allows the inclination when an inclination occurs between the inner ring 42 and the outer ring 41 of the bearing 40.

As described above, in the bearing 40, the outer ring collar 43a on one side is brought into close contact with the bearing wall 35 of the door roller 30, the inner ring collar 44a is brought into close contact with the connecting wall 23 of the fixed shaft 22, and the inner ring collar 44b on the other side is brought into close contact with each other. The first stop ring 29b is fitted and fixed to the two shaft portion 22b, and the outer ring collar 43b is fixed to the second shaft hole 34b by fitting the shim ring 46 and the second stop ring 47.
The door roller 30 is rotatably mounted on the fixed shaft 22 of the door roller support 20 via the bearing 40.

Then, the bearing 40 having a centering function, the gap h between the first shaft hole 34a and the first shaft portion 22a, the cavity i between the inner ring collar 44b of the bearing 40 and the second stop ring 47, and the taper-shaped side surface. The door wheel 30 having 31a tilts between the inner ring 42 and the outer ring 41 of the bearing 40 even when the fixed shaft 22 of the door wheel support 20 is bent or the door wheel 30 is tilted during the opening / closing movement of the door body 01. By allowing the generation of θ2, it is possible to drive the door roller 30 without applying an unreasonable load.

Returning to FIG. 1, the connecting portion 16 is composed of a connecting plate 17 extending in the horizontal direction and a belt connecting plate 18 attached to the central portion thereof. One suspension frame 10 is attached to one end of the connecting plate 17 via a door roller support 20, and the other suspension frame 10 is similarly attached to the other end.
The upper end of the belt connecting plate 18 is connected to the timing belt 58 spanned between the drive pulley 56 and the driven pulley 57, and the lower end thereof is joined to the central portion of the connecting plate 17.

As shown in FIG. 3, the rail portion 50 is composed of a member including a vertical portion 51 and a bottom portion 52 that are L-shaped when viewed from the side surface, and is installed along the opening / closing direction of the door body 01. A convex-shaped rail 53 on which the door roller 30 runs is provided on the upward surface of the bottom portion 52. Further, the downward surface of the bottom portion 52 constitutes a surface that the derailment prevention roller 13 attached to the suspension frame 10 contacts.

The derailment prevention roller 13 is attached to the suspension frame 10 with a slight gap so as to avoid constant contact with the downward surface of the bottom portion 52.
The vertical portion 51 is provided with a plurality of through holes 54 for penetrating the male threaded portion of the bolt 55 at regular intervals, and is fixed to the side wall of the building via the bolt 55.

The automatic door suspension device of the present invention travels because a door roller in which a roller bearing having an automatic centering function is attached to the bearing can avoid an unbalanced load on the door roller due to rolling of the automatic door body or tilting of the door roller. It can prevent the increase of noise, reduce the wear and tear of the door roller, and can be suitably used as an automatic door installed at the entrance of a building.

01 Door body 10 Suspended frame 16 Connecting part 20 Door wheel support 21 Base part 22 Fixed shaft 22a 1st shaft part 22b 2nd shaft part 23 Connecting wall 24a 1st shaft part outer peripheral surface 24b 2nd shaft part outer peripheral surface 30 Door wheel 31a Door wheel Side 32 Outer circumference 33 Rolling surface 34 Shaft hole 35 Bearing wall 36 Shaft hole inner peripheral surface 36a 1st shaft hole inner peripheral surface 36b 2nd shaft hole inner peripheral surface 40 Bearing 41 Outer ring 42 Inner ring 43 Outer ring collar 44 Inner ring collar 46 Sim ring 47 2nd Stop ring 50 Rail part h Void i Cavity d Shaft hole depth w Bearing width

Claims (4)

In a suspension device provided with a suspension frame for suspending the door body and a door roller support equipped with a door roller, the door wheel is rolled on a rail arranged in the moving direction of the door body to allow the door body to open and close freely. The door roller is mounted on the fixed shaft of the door roller support via a bearing incorporating a roller having a rolling surface between the inner ring having two rows of tracks and the outer ring having a spherical track. A featured automatic door suspension system. In the shaft hole of the door roller, a cavity between the bearing fitted in the shaft hole and a stopper for fixing the outer ring collar of the bearing, and a fixing shaft of the door roller support penetrating into the shaft hole. The suspension of an automatic door according to claim 1, further comprising a gap between the outer diameter and the inner diameter of the shaft hole of the door roller, and providing a space capable of freely allowing the inclination of the inner ring of the bearing. apparatus. The automatic door suspension device according to claim 1 or 2, wherein the side surface of the door roller facing the door roller support has a teaper-like shape from the outer circumference toward the center of the circle. The automatic door suspension device according to any one of claims 1 to 3, wherein the shaft hole of the door roller in which the bearing is fitted is closed with a flat plate of a disk having the same diameter as the bearing.

Images