JP2018017060A - Suspension device for automatic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic door that smoothly moves by reducing abrasion of and damage to a door roller rolling face by avoiding a load placed on the door roller owing to a lateral swing of a door in operation and inclination of the door roller.SOLUTION: A suspension device comprises a suspension frame 10 suspending a door body 01 and a door roller support 20 mounted with a door roller 30, and is configured to allow the door body 01 to travel to open and close by rolling the door roller 30 on a rail 53 arranged in a moving direction of the door body 01, the door roller 30 being mounted on a fixed shaft 22 of the door roller support 20 through a bearing 40 having two track grooves at an inner ring 42 and a spherical track face and a roller-like rolling body 45 at an outer ring 41.SELECTED DRAWING: Figure 5

Description

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

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 to the motor via a speed reducer, a timing belt that is provided between the pulleys, with the drive pulley as one end and a slave pulley at the other end.

A door body is connected to the timing belt via a suspension device. The suspension device is equipped with a door wheel having a concave groove formed on its outer peripheral surface.
Then, the door wheel smoothly rotates on the rail having the convex shape provided on the rail portion attached to the wall surface, and freely opens and closes the door. Thus, when the door wheel smoothly rotates on the rail part and the door body is opened and closed, the center of the groove of the door wheel and the center of the convex rail part are engaged, and the door The weight of the main body is evenly distributed to the door wheel on the rail.

However, if the door body is exposed to wind pressure from the outside, the difference between the internal and external pressures in the room, or the pressure from contact with obstacles from one direction, the door body will shake, and this swing will cause the doorwheel shaft to move open and close. Deflection occurs. Moreover, the rail part attached to the wall surface is not completely straight, and is partially distorted or uneven. When the door travels on such a rail portion, misalignment occurs between the door and the shaft.
If the door body is opened or closed in an unreasonable state where the shaft is deflected or misaligned, a biased load will be applied to the door wheel, causing wear and damage to the rotating part of the door wheel, and abnormal running noise. .

As means for solving this problem, Reference 1 discloses that the rail is engaged with the rail for the purpose of restricting the displacement of the door roller in the direction of the door shaft, and the rails are sandwiched between both sides in the direction perpendicular to the longitudinal direction of the rail. It is described to provide a sliding body that slides along the line.
However, when such a method is used, accessories to the suspension device increase, the device itself becomes complicated, and it takes time to perform attachment 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.

JP 2003-148038 A

  The present invention is an automatic door that reduces the load on the door wheel caused by rolling when the door is opened and closed, prevents an increase in running noise, reduces the wear and damage of the door wheel, and is simple and easy to install. A suspension device is provided.

  The suspension device for an automatic door according to the present invention includes a suspension frame 10 for suspending a door body 01 and a door support 20 to which a door 30 is attached, and a rail portion 50 in which the door 30 is arranged in the moving direction of the door body 01. In the suspension device that rolls up and travels so that the door body 01 can freely open and close, the door wheel 30 has a bearing having two rows of raceway grooves in the inner ring 42, a spherical raceway surface in the outer ring 41, and a roller-like rolling element 45. It is mounted on the fixed shaft 22 of the door support 20 through 40.

In the shaft hole 34 of the door wheel 30, the cavity i between the bearing 40 fitted in the shaft hole 34 b and the stopper 47 for fixing the outer ring rod 43 b 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 pendulum support 20 that penetrates and the inner diameter of the shaft hole 34a of the door wheel 30 and allowing the inclination of the inner ring 42 of the bearing 40 freely. And h.

A side surface 31a of the door roller 30 facing the door roller support body 20 has a tipa shape from the outer periphery toward the center of the circle.

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

According to the first aspect of the present invention, the door body is provided with a suspension frame for suspending the door body and a door wheel support body on which the door wheel is mounted, and the door wheel is rolled on a rail disposed in the moving direction of the door body. In the suspension device that travels freely openable and closable, the door wheel is mounted on the fixed shaft of the door wheel support through a bearing having two rows of raceway grooves on the inner ring, a spherical raceway surface on the outer ring, and a roller-like rolling element. As a result, the centering function works and supports the door wheel so that the door wheel can rotate even when the door shaft is misaligned due to the rolling of the door body or the tilt of the door wheel during opening and closing movement. It can prevent the increase and reduce wear and damage to the door roller.

According to the second aspect of the present invention, in the shaft hole of the door wheel, the cavity between the bearing fitted in the shaft hole and the stopper for fixing the outer ring rod of the bearing, and the door wheel support penetrating the shaft hole It has a space between the outer diameter of the fixed shaft of the body and the inner diameter of the shaft hole of the door wheel, and it has a space that allows the inner ring of the bearing to freely tilt, so the roll of the door body during opening and closing movement When the center axis of the fixed shaft and the door roller is misaligned due to the tilt of the door roller Since it can be supported, it is possible to prevent an increase in running noise and reduce wear and damage to the door wheel.

According to the invention described in claim 3, since the side surface of the door wheel facing the door wheel support has a tipa shape from the outer periphery toward the center of the circle, the door wheel caused by the roll of the door body during opening and closing movement. Even if tilting of the support body or tilting of the door roller occurs, contact between the door wheel support body and the side surface of the door wheel can be prevented and the door wheel can be supported rotatably, thereby preventing an increase in running noise and wear and damage to the door wheel. Can be reduced.

According to the fourth aspect of the present invention, the shaft hole of the door wheel in which the bearing is fitted is closed with a flat plate of a disk having the same diameter as the bearing. It can prevent the intrusion of dirt and dust to maintain the smooth movement of the bearing, prevent an increase in running noise, and reduce the wear and damage of the door wheel.

It is a front view which shows the structure of the automatic door of this invention. It is a front view which shows a suspension apparatus. It is the sectional view on the AA line in FIG. It is an exploded view which mounts a door to the door support of the present invention. (A) is a side view of a door cart support body, (b) is a longitudinal sectional view of the door wheel, and (c) is a bearing and a stopper attached to a shaft hole of the door wheel and a fixed shaft of the door wheel support body. It is the longitudinal cross-sectional view which attached the door roller to the door roller support body. (A) It is a longitudinal cross-sectional view of a bearing, (b) It is a longitudinal cross-sectional view which shows the inclination between the inner ring | wheel and outer ring | wheel of a bearing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an automatic door suspension apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a configuration when the suspension device of the present invention is applied to an automatic door.
The suspension device for an automatic door according to the present invention includes a pair of suspension frames 10 fixed to a door end side and a door bottom side of an upper edge portion 02 of a door body 01, a door support 20 attached to the suspension frame 10, and a door support. It is comprised from the connection part 16 which connects the door cart 30 with which the body 20 was mounted | worn, and the door cart support body 20 attached to a pair of suspension frame 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. The suspension frame 10 is provided with a derailment prevention roller 13. A rail portion 50 is laid along the opening / closing direction of the door body 01 between the door pulley 30 and the derailment prevention roller 13.
A convex rail 53 is formed on the rail portion 50, and a rolling surface 33 of a concave groove formed on the outer peripheral portion 32 of the door wheel 30 rotates along the rail 53.

As illustrated in FIGS. 2 and 3, the hanging frame 10 is a plate member that includes a bottom plate portion 11 and a vertical plate portion 12 having an L shape when viewed from the side.
The hanging frame 10 is fixed to the door body 01 by inserting bolts into through holes 14 formed in the bottom plate portion 11 by contacting the lower surface of the bottom plate portion 11 with the upper edge portion 02 of the door body 01.
A plurality of female screw portions 15 are formed in the central portion of the vertical plate portion 12 of the hanging frame 10 to be connected to a door support 20 described later with bolts.
A derailment prevention roller 13 is attached to one end portion of the vertical plate portion 12 of the hanging frame 10.

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

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

The fixed shaft 22 includes a first shaft portion 22 a that contacts the base portion 21, a second shaft portion 22 b that attaches a bearing, and a third shaft portion 22 c that passes through the through hole 26 of the base portion 21. The connecting wall 23 is a partition wall between 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 to be fitted to the inner diameter of the bearing 40 to be attached.
A ring-shaped first recess 29a for fitting a 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 30 is mounted on the fixed shaft 22, which is a horizontal shaft, via a bearing 40.

As shown in FIG. 4 (b), the door 30 has a shaft hole 34 at its center and a rolling surface 33 with a groove in the outer periphery 32, and one side 31 a of the door 30 has an outer periphery. It has a tipa-like shape with a gradient of angle θ1 from 32 toward the center of the circle.
This is for avoiding the contact between the door support 20 and the door 30 when the fixed shaft 22 of the door support 20 is bent due to the roll of the door body 01 or when the door 30 is tilted. .

In the present invention, the angle θ1 is 5 °, but the angle is not limited to this, and the angle can be appropriately used within a range of 3 ° to 8 °. The reason why the angle is in the range of 3 ° to 8 ° is that if the angle 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 wheel 30 is reduced.

The shaft hole 34 of the door pulley 30 is a stepped hole, and includes a first shaft hole 34a, a second shaft hole 34b, and a bearing wall 35 that 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 pulley 30 is mounted on the fixed shaft 22 with the side surface 31 a having the tipa 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 raceways and an outer ring 41 having a spherical raceway. .
Since the center of the outer ring raceway surface coincides with the center of the bearing, the bearing 40 is self-aligning 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 an inclination θ2 generated between the inner ring 42 and the outer ring 41 of the bearing 40.

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

A bearing 40 is fitted into the second shaft hole 34 b of the door wheel 30, and the bearing 40 is fixed in the shaft hole 34 of the door wheel 30 at a position where one outer ring rod 43 a is in close contact with the bearing wall 35. . Then, the fixed shaft 22 of the door support 20 is fitted into the shaft hole 34 of the door 30 to which the bearing 40 is attached. As a result, the second shaft portion 22 b of the fixed shaft 22 is fitted to the inner ring 42 of the bearing 40, and the inner ring flange 44 a of the bearing 40 is in close contact with the connecting wall 23 of the fixed shaft 22.
Further, the first stop ring 29b as 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, and the inner ring flange 44b of the bearing 40 is pressed. The bearing 40 is fixed to the second shaft portion 22b.

The other outer ring rod 43b of the bearing 40 is fixed by a second stop ring 47 which is a stopper through a shim ring 46 for adjusting the clearance. The bearing 40 is fitted into the second shaft hole 34b of the door wheel 30 as described above, and the depth d of the second shaft hole 34b is configured to be larger than the width w of the bearing 40. It is embedded in the hole 34b.

A second recess 37 into which the second stop ring 47 for fixing the bearing 40 is fitted is formed in the inner peripheral surface 36b of the second shaft hole 34b at a certain distance from the outer ring flange 43b of the bearing 40.
A plurality of shim rings 46 of the same size as the outer ring rod 43b are stacked between the outer ring rod 43b of the bearing 40 and the second stop ring 47 to fix the bearing 40 in the second shaft hole 34b.

A gap i formed by adjusting the clearance between the inner ring flange 44b of the bearing 40 and the second stop ring 47 is secured by interposing a shim ring 46 as a clearance adjustment tool between the outer ring flange 43b and the second stop ring 47. can do. In the present invention, the width of the cavity i is 4 mm, and the size of the cavity i is determined by the number of shim rings 46 to be stacked, but the present invention is not limited to this.

The cavity i allows an inclination when an inclination occurs between the inner ring 42 and the outer ring 41 of the bearing 40. A part of the first stop ring 29b for fixing the bearing 40 to the second shaft portion 22b is also fitted in the first recess 29a formed near the end of the outer peripheral surface 24b of the second shaft portion 22b. And is configured so as not to hinder the occurrence of the tilt.

Moreover, the cavity i between the bearings 40 can be closed by making one disk located outside the shim ring 46 a disk having the same diameter as the bearings 40. In particular, in the case of an automatic door installed at the entrance of a building, dust and dust easily enter the rolling surface portion in which the roller 45 of the shape of the bearing 40 is incorporated, thereby inhibiting the automatic alignment function of the bearing 40. To be. It is possible to prevent the entry of dust and dust from the outside by making one disk located on the outside a flat plate of a disk.

Further, the inner diameter of the first shaft hole 34a and the first shaft so that a gap h is generated between the inner peripheral surface 36a of the first shaft hole 34a of the door wheel 30 and the outer peripheral surface 24 of the first shaft portion 22a of the fixed shaft 22. The door 30 is mounted on the fixed shaft 22 by adjusting the outer diameter of the portion 22a. The distance of the gap h is such that when the fixed shaft 22 of the door support 20 is bent due to the roll of the door body 01 or when the door 30 is tilted, the outer peripheral surface 24a of the first shaft portion 22a and the door 30 are The distance which the inner peripheral surface 36a of the 1st axial hole 34a does not contact should just be ensured. Therefore, this gap h allows an 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 rod 43a on one side is brought into close contact with the bearing wall 35 of the door wheel 30, the inner ring rod 44a is brought into close contact with the connecting wall 23 of the fixed shaft 22, and the inner ring rod 44b on the other side is arranged in the first position. The first stop ring 29b is fixed by fitting to the biaxial portion 22b, and the shim ring 46 and the second stop ring 47 are fixed to the second shaft hole 34b by fitting.
The door 30 is mounted on the fixed shaft 22 of the door support 20 via the bearing 40 so as to be able to roll.

The bearing 40 having the aligning 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 side surface of the tipper shape. Inclination between the inner ring 42 and the outer ring 41 of the bearing 40 even if the fixed shaft 22 of the door support 20 is deflected during the opening and closing movement of the door body 01 by the door 30 having 31a or the door 30 is inclined. The generation of θ2 is allowed, and traveling without applying an excessive load to the door pulley 30 is enabled.

Returning to FIG. 1, the connecting portion 16 includes 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 support 20, and the other suspension frame 10 is similarly attached to the other end.
The upper end portion of the belt connecting plate 18 is connected to a timing belt 58 that spans between the driving pulley 56 and the driven pulley 57, and the lower end portion 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, and is installed along the opening / closing direction of the door body 01. A convex-shaped rail 53 on which the door roller 30 travels is provided on the upward surface of the bottom 52. The downward surface of the bottom 52 constitutes a surface with which the derailment prevention roller 13 attached to the suspension frame 10 comes into contact.

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

  The automatic door suspension system according to the present invention travels because a door roller having a roller bearing having a self-aligning function attached to the bearing can avoid a biased load on the door wheel due to rolling of the automatic door body or inclination of the door wheel. It can be used as an automatic door installed at the entrance of a building because it prevents the increase of sound and reduces the wear and damage of the door roller.

01 door body 10 hanging frame 16 connecting portion 20 door carriage support 21 base portion 22 fixed shaft 22a first shaft portion 22b second shaft portion 23 connecting wall 24a first shaft portion outer peripheral surface 24b second shaft portion outer peripheral surface 30 door wheel 31a door Side surface 32 Outer peripheral portion 33 Rolling surface 34 Shaft hole 35 Bearing wall 36 Shaft hole inner peripheral surface 36a First shaft hole inner peripheral surface 36b Second shaft hole inner peripheral surface 40 Bearing 41 Outer ring 42 Inner ring 43 Outer ring rod 44 Inner ring rod 46 Shim ring 47 Second Stop ring 50 Rail part h Cavity i Cavity d Shaft hole depth w Bearing width

Claims (4)

In a suspension device comprising a hanging frame for holding a door body and a door support supporting a door wheel, and rolling the door wheel on a rail arranged in the direction of movement of the door body so that the door body can be opened and closed freely. An automatic door suspension system characterized in that the door wheel is mounted on a fixed shaft of the door wheel support through a bearing having two rows of raceway grooves on the inner ring and a spherical raceway surface and a roller-like rolling element on the outer ring. . In the shaft hole of the door wheel, a cavity between the bearing fitted in the shaft hole and a stopper for fixing the outer ring rod of the bearing, and a fixed shaft of the door wheel support member penetrating the shaft hole 2. The suspension of an automatic door according to claim 1, further comprising a space having an outer diameter and an inner diameter of a shaft hole of the door wheel and allowing an inclination of the inner ring of the bearing. apparatus. The suspension device for an automatic door according to claim 1 or 2, wherein a side surface of the door roller facing the door roller support has a tipa-like shape from the outer periphery toward the center of the circle. 4. The suspension device for an automatic door according to claim 1, wherein a shaft hole of a door wheel in which the bearing is fitted is closed with a flat plate of a disk having the same diameter as the bearing.

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