JP2006118240A - Opening and closing device of circular door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving transfer mechanism of an opening and closing device of a circular door capable of also preventing the durability of a belt from being damaged without making any noise in the case the door is opened and closed. <P>SOLUTION: The opening and closing device of the circular door consists of a driving pulley 5 placed on one end side of a moving orbit, a follower pulley 6 placed on the other end side of the moving orbit and a toothed belt 7 forming an outside surface 71 in a flat-shape and having a tooth section 72 on an inside surface 70, an endless belt 17 hung around between the driving pulley 5 and the follower pulley 6, a plurality of outside guide rollers 8 guiding the outside circle side element 17A of the endless belt 17 in a circular-arc shape by slidingly coming into contact with the inside surface 70, a plurality of inside guide rollers 9 guiding the inside circle side element 17B of the endless belt 17 in the circular-arc shape by slidingly coming into contact with the outside surface 71 and connecting means 10 and 11 of a door body 1 and the endless belt 17. The inside surface 70 of the toothed belt 7 consists of the tooth section 72 formed in a part in the direction of the width of the inside surface and a flat section 73, and the circumferential surface of each outside guide roller 8 consists of a recess section 82 wherein the tooth section 72 is accepted so as not to engage with it and a guide surface slidingly coming into contact with the flat section 73. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an opening / closing device for a circular door, and more particularly to an opening / closing device for a circular door having a feature in a drive transmission mechanism.

In general, a toothed belt transmission mechanism using a standard timing belt (a toothed belt having a tooth portion in the entire width of the belt) is used as a drive transmission mechanism in a circular door opening and closing device. That is, in a circular door that travels along a circular or arcuate movement locus in plan view, a toothed drive pulley is disposed on one side of the movement locus, and a toothed driven pulley is disposed on the other side. The endless belt consisting of a toothed belt having a tooth portion on the inner surface and a smooth outer surface is stretched over the driven pulley and the toothed driven pulley, and the door body is connected to the endless belt. The door body is caused to travel along with the movement of the endless belt.

An endless belt composed of a toothed belt is guided by a plurality of guide rollers arranged inside and outside along the movement locus, but the inner guide roller corresponding to the outer surface of the toothed belt has a flat peripheral surface. The outer guide roller corresponding to the inner surface of the toothed belt must be a roller having a toothed surface. However, in this case, during the rotational movement of the endless belt, the tooth portion of the toothed belt and the teeth of the outer guide roller rub against each other, generating a noise problem.

In Patent Document 1, a countermeasure against noise is taken by twisting a timing belt without using a toothed guide roller. However, since the timing belt is twisted, there is a problem in the durability of the belt. Although a V-belt can be used as a transmission belt, the V-belt has a disadvantage that slippage occurs between the driving roller and the belt, resulting in a positional shift.
Reality 7-14604

It is an object of the present invention to provide a drive transmission mechanism for a circular door opening and closing device that does not generate noise when the door is opened and closed, and does not impair the durability of the belt.

The technical means employed by the present invention in order to achieve the above object is to provide a drive pulley disposed on one end side of the movement locus in a circular door opening and closing device having a door body that travels along an arcuate movement locus in plan view. And a driven pulley disposed on the other end of the movement locus, and a toothed belt having a flat outer surface and a toothed portion on the inner surface, and is hung between the driving pulley and the driven pulley. The rotated endless belt, a plurality of outer guide rollers that guide the outer circle side portion of the endless belt in an arc shape by sliding contact with the inner side surface, and the inner circle side portion of the endless belt by sliding contact with the outer side surface A plurality of inner guide rollers for guiding in an arc shape, and a connecting means for connecting the door body and the endless belt, and the inner side surface of the toothed belt is formed in a width direction portion of the inner side surface. It consists of a tooth part and a flat part, Peripheral surface of the outer guide rollers, and a sliding contact guide surface in the recess and the flat portion receiving a manner that does not mesh the tooth portion.

By making the width of the toothed portion of the toothed belt shorter than the belt width and forming a recess for receiving the toothed portion on the peripheral surface of the outer guide roller, the toothed portion of the toothed belt can mesh with the outer guide roller. Since the toothed belt and the outer guide roller rub against each other, no noise is generated. In one preferable aspect, the inner surface of the toothed belt has a flat part formed at both ends in the width direction and a tooth part formed between the flat parts, and the peripheral surface of the outer guide roller has upper and lower ends. A guide surface formed on the guide portion and a recess formed between the guide surfaces, and the outer guide roller is in sliding contact with the flat portion with the tooth portion received in the recess. It is. In this case, since the guide roller peripheral surface supports both ends in the width direction of the belt, the belt can be prevented from being twisted, and stable support and guidance can be achieved. Furthermore, in a preferred aspect, the tooth portion of the toothed belt is received in a non-contact manner in the concave portion of the outer guide roller. By doing so, it is possible to more reliably prevent noise that may occur due to contact of the tooth portions of the toothed belt.

In one aspect, the inner guide roller and the outer guide roller have the same shape. The inner guide roller guides the flat surface of the toothed belt, and the shape of the inner guide roller has a degree of design freedom. If the inner guide roller has the same shape as the outer guide roller, it is only necessary to prepare one type of guide roller, so that the number of parts can be reduced, which is advantageous in terms of cost.

Although the endless belt is composed of a toothed belt, the inner and outer guide rollers and the toothed belt do not rub against each other, so noise is generated when the inner and outer guide rollers and the endless belt are engaged and disengaged. Therefore, noise generated when opening and closing the door of the circular door opening and closing device can be reduced. Further, since the endless belt is not twisted, the endless belt has good durability.

FIG. 1 is a partially omitted plan view of a circular door, in which a pair of arcuate door bodies 1 and 1 travel so as to approach and separate from each other along a semicircular or arcuate movement trajectory in plan view. By doing so, the opening is opened and closed. A suspension roller 2 is provided at the upper end of the door body 1, and the door body 1 is attached to a guide rail 4 disposed in an upper frame (openness) 3 above the opening via the suspension roller 2. It is possible to run along. Although the guide rail 4 is omitted in FIG. 1, the guide rail 4 extends in an arc shape in the opening width direction so as to follow the movement locus of the door body 1.

A toothed drive pulley 5 is disposed at one end side in the opening width direction of the upper frame 3 (one end side of the movement locus), while the other end side in the opening width direction of the upper frame 3 (the other end of the movement locus). The driven pulley 6 is disposed on the side. Between the drive pulley 5 and the driven pulley 6, an endless belt 17 composed of a toothed belt 7 is wound around. The endless belt 17 hung between the drive pulley 5 and the driven pulley 6 includes an outer circle side portion 17A and an inner circle side portion 17B.

The outer circle side portion 17A of the endless belt 17 is guided in an arc shape by a plurality of outer guide rollers 8 arranged at intervals so as to substantially follow the movement locus. The inner circle side portion 17B of the endless belt 17 is guided in an arc shape by a plurality of inner guide rollers 9 arranged at intervals so as to substantially follow the movement locus. The toothed belt 7 constituting the endless belt 17 has an inner side surface 70 having tooth portions and a flat outer side surface 71, and the peripheral surface of the outer guide roller 8 is in sliding contact with the inner side surface 70. The peripheral surface of the guide roller 9 is in sliding contact with the outer surface 71. Therefore, when the endless belt 17 is rotationally driven by the toothed drive pulley 5, the endless belt 17 is guided by the inner and outer guide rollers 8 and 9 arranged in an arc shape and moves in an arc shape along the movement locus. To do.

Belt holders (belt holders) 10, 11 are formed on the support member of the suspension roller 2 at the top of the door body 1 so as to be positioned above the suspension roller 2. , 11 to the endless belt 17. As shown in FIG. 1, one door body 1 is connected to an outer circle side portion 17 </ b> A of an endless belt 17 via a belt holder 10, and the other door body 1 is connected to an endless belt via a belt holder 11. The two door bodies 1 run in different directions (proximity or separation) in conjunction with the movement of the endless belt 17 by the rotation of the toothed drive pulley 5. Open and close the opening.

The toothed belt 7 constituting the endless belt 17 has an inner side surface 70 as a toothed surface and an outer side surface 71 as a flat surface. The width of the tooth portion 72 formed on the inner side surface 70 is larger than the belt width. The tooth portion is formed only on a part of the inner surface 70 in the width direction. FIG. 5 illustrates some aspects of the configuration of the tooth portion of the toothed belt 7 (configuration of the inner side surface 70). In the upper two, the tooth portion 72 is formed only at the central portion in the width direction of the belt 7, and the upper and lower portions in the width direction of the belt 7 are flat portions 73. Two of them are formed with tooth portions 72 at both the upper and lower portions in the width direction of the belt 7, and the central portion in the width direction of the belt 7 is a flat portion 73. In the lower two, the tooth portion 72 is formed only in the upper half portion of the belt 7 in the width direction, and the lower half portion of the belt 7 in the width direction is a flat portion 73. Although not shown, the tooth portion may be formed only in the lower half of the belt in the width direction.

2 to 4 are longitudinal sectional views in the upper frame 3, showing a driving pulley portion, a guide roller portion, and a driven pulley portion, respectively. The upper frame 3 has a substantially rectangular shape in cross section, and an opening 30 for receiving the upper end portion of the door body 1 is formed on the lower side. The opening 30 is formed in an arc shape along the movement locus of the door body 1. A support piece 31 extending in the vertical direction is disposed in the upper frame 3. Upper brackets 32, 33, and 34 having an L shape in cross section are provided on the upper side of the support piece 31, and a cross section view is provided on the lower side. An L-shaped lower bracket 35 is attached. A toothed drive pulley 5 is supported on the upper bracket 32, a driven pulley 6 is supported on the upper bracket 33, and an outer guide roller 8 and an inner guide roller 9 are rotatably supported on the upper bracket 34, respectively. A guide rail 4 is supported on the lower bracket 35.

FIG. 2 shows a drive pulley unit. The toothed drive pulley 5 and the motor 12 are supported on the upper bracket 32, and the toothed drive pulley 5 is rotationally driven by the motor 12. The tooth shape of the toothed drive pulley 5 has a shape that meshes with the tooth portion 72 of the inner surface 70 of the toothed belt 7. In the illustrated example, the peripheral surface of the toothed drive pulley 5 has a belt width. It is formed from a tooth having a concave shape in cross section so as to correspond to the tooth portion 72 formed only at the central portion in the direction.

FIG. 3 shows the guide roller portion. An outer guide roller 8 and an inner guide roller 9 are suspended from the upper bracket 34, respectively. The peripheral surface of the outer guide roller 8 is in sliding contact with the inner side surface 70 (toothed surface) of the toothed belt 7 constituting the outer circle side portion 17A of the endless belt 17. The peripheral surface of the inner guide roller 9 is in sliding contact with the outer surface 71 (flat surface) of the toothed belt 7 constituting the inner circle side portion 17B of the endless belt 17.

By forming the peripheral surface of the outer guide roller 8 in a stepped shape, a concave portion 82 (see FIG. 8) for receiving the tooth portion 72 of the toothed belt 7 is formed on the peripheral surface. The surface guides the outer circular portion 17A of the endless belt 17 in such a manner that the tooth portion 72 of the inner surface 70 of the toothed belt 7 does not mesh. In the illustrated example, the outer guide roller 8 is composed of an upper and lower large diameter portion 80 and a small diameter portion 81 between the upper and lower large diameter portions 80, and the peripheral surface of the large diameter portion 80 constitutes a guide surface. The large diameter portion 80 and the small diameter portion 81 form a recess 82 that receives the tooth portion 72. The height of the central recess 82 is larger than the height of the teeth 72 of the toothed belt 7, and the depth of the recess 82 is larger than the protrusion of the teeth 72. is doing. Therefore, the inner side surface 70 which is the toothed surface of the toothed belt 7 is a state in which the tooth portion 72 at the center portion in the width direction is received in a non-contact state by the recess 82 formed at the center of the peripheral surface of the outer guide roller 8. Thus, the upper and lower flat portions 73 are guided in sliding contact with the guide surface formed by the peripheral surface of the large diameter portion 80. In this case, since the guide surfaces of the outer guide roller 8 support the width direction both ends of the toothed belt 7, it is possible to prevent the toothed belt 7 from being twisted and to support and guide stably. The same effect can be obtained when a guide roller having the same shape as the outer guide roller 8 is used as the inner guide roller 9. As described above, the shape of the peripheral surface of the outer guide roller 8 is formed in a shape corresponding to the shape of the inner surface 70 that is the toothed surface of the toothed belt 7. Specifically, based on FIG. 5, when the inner surface 70 of the toothed belt 7 is composed of a flat portion 72 formed at both ends in the width direction and a tooth portion 72 formed between the flat portions 73. The outer circumferential surface of the outer guide roller 8 is composed of a guide surface (large diameter portion 80) formed at both upper and lower end portions and a recess 82 formed between the guide surfaces. When the inner surface of the toothed belt 7 is composed of tooth portions 72 formed at both end portions in the width direction and flat portions 73 formed between the tooth portions 72, the peripheral surface of the outer guide roller 8 has upper and lower ends. It is comprised from the recessed part 82 formed in the part, and the guide surface (large diameter part 80) formed between the recessed parts 82. FIG. When the inner surface of the toothed belt 7 is composed of a tooth portion 72 formed on one of the end portions in the width direction and a flat portion 73 other than the tooth portion, the peripheral surface of the outer guide roller 8 is one of the upper and lower end portions. And a guide surface (large diameter portion 80) other than the recess 82.

The inner guide roller 9 is guided in sliding contact with the flat outer surface 71 of the toothed belt 7. The shape of the peripheral surface of the inner guide roller 9 is not limited as long as it can slide and contact the outer surface 71 of the toothed belt 7. 2 to 4, the inner guide roller 9 is formed of a substantially cylindrical body and has one peripheral surface. Further, FIGS. 6 and 7 illustrate other modes of the inner guide roller 9. In FIG. 6, the inner guide roller 9 is composed of three large diameter portions 90, and each peripheral surface of the three large diameter portions 90 is in sliding contact with the flat outer surface 71 of the toothed belt 7 as a guide surface. 7 includes two upper and lower large-diameter portions 90, and each peripheral surface of the two large-diameter portions 90 is in sliding contact with the flat outer surface 71 of the toothed belt 7 as a guide surface. In FIG. 7, the inner guide roller 9 has the same shape as the outer guide roller 8, and the inner and outer guide rollers 8, 9 can be made of the same member, so that the number of parts can be reduced. .

FIG. 8 is a diagram showing details of the inner and outer guide rollers 8 and 9 in FIG. The outer guide roller 8 includes a shaft portion extending in the vertical direction, an upper and lower large-diameter portion 80 that is rotatably attached to the shaft portion with a space in the vertical direction, and an upper and lower large-diameter portion 80. The outer guide roller 8 includes a large-diameter portion 80 and a small-diameter portion 81, and a concave portion 82 is formed on the peripheral surface of the outer guide roller 8. The peripheral surface of the large-diameter portion 80 is in sliding contact with the flat portion 73 of the inner surface 70 of the toothed belt 17 constituting the outer circle side portion 17A of the endless belt as a guide surface, and the tooth portion 82 on the inner surface contacts the recess 82. It is accepted in a non-meshing manner. The height dimension of the recess 82 is larger than the height dimension of the tooth portion 72 of the toothed belt 7, and the depth dimension of the recess 82 formed by the large diameter portion 80 and the small diameter portion 81 is the tooth size. The dimension is larger than the projecting dimension of the portion 72. Therefore, the inner side surface 70 which is the toothed surface of the toothed belt 7 is a state in which the tooth portion 72 at the center portion in the width direction is received in a non-contact state by the recess 82 formed at the center of the peripheral surface of the outer guide roller 8. Thus, the upper and lower flat portions 73 are guided in sliding contact with the guide surface formed by the peripheral surface of the large diameter portion 80. The inner guide roller 9 has a shaft portion extending in the vertical direction and an upper and lower large-diameter portion 90 that is rotatably mounted on the shaft portion with a space in the vertical direction, and is the same as the outer guide roller 8. It has a shape. The peripheral surface of the large-diameter portion 90 is in sliding contact with the smooth surface of the outer surface 71 of the toothed belt 17 constituting the outer circle side portion 17B of the endless belt as a guide surface.

The driven pulley 6 has a larger diameter than the drive pulley 5 as a whole. In the illustrated example, the peripheral surface of the drive pulley 5 includes upper and lower contact surfaces 60 that contact the flat portion 73 of the inner surface 70 of the toothed belt 7 constituting the endless belt 17, and a recess 61 that receives the tooth portion 72. It rotates with the movement of the endless belt 17 in a state where the tooth portion 72 is received in the recess. The driven pulley 6 may be a toothed pulley or a non-toothed pulley as long as it can rotate with the movement of the endless belt 17.

In the drive transmission mechanism configured as described above, when the opening is opened and closed by the circular door, the drive pulley 5 is rotated by the motor 12 to run the endless belt 17, and the door body 1 is moved along with the running of the endless belt 17. Travel in different directions to open or close the opening. At this time, the endless belt 17 is guided in an arc shape by the inner and outer guide rollers 8 and 9, and both the inner and outer guide rollers 8 and 9 are placed on the flat surfaces 71 and 73 of the toothed belt 7 constituting the endless belt 17. Since it comes into sliding contact, no noise is generated.

The present invention can be used as a drive transmission mechanism for an opening / closing device in a circular door.

It is a schematic plan view of a circular door. It is a longitudinal cross-sectional view which shows the drive pulley part of the drive transmission mechanism of the opening / closing apparatus of a circular door. It is a longitudinal cross-sectional view which shows the guide roller part of the drive transmission mechanism of the opening / closing apparatus of a circular door. It is a longitudinal cross-sectional view which shows the driven pulley part of the drive transmission mechanism of the opening / closing apparatus of a circular door. It is a figure which shows some embodiments of the toothed belt which comprises an endless belt. It is a longitudinal cross-sectional view which shows a guide roller part, Comprising: The other embodiment of the inner guide roller is shown. It is a longitudinal cross-sectional view which shows a guide roller part, Comprising: The other embodiment of the inner guide roller is shown. FIG. 8 is a detailed view of an inner guide roller and an outer guide roller in FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door body 5 Drive pulley 6 Driven pulley 7 Toothed belt 70 Inner side surface 71 Outer side surface 72 Tooth part 73 Smooth surface 17 Endless belt 17A Outer circle side part 17B Inner circle side part 8 Outer guide roller 80 Large diameter part 81 Small diameter part 82 Guide roller in recess 9

Claims (4)

In the opening / closing device of the circular door having a door body that travels along a moving locus having a circular arc shape in plan view,
A drive pulley disposed at one end of the movement locus;
A driven pulley disposed on the other end of the movement locus;
The outer side surface is formed of a toothed belt having a flat shape and a tooth portion on the inner side surface, and an endless belt wound around between the driving pulley and the driven pulley;
A plurality of outer guide rollers for guiding the outer circle side portion of the endless belt in an arc shape by sliding contact with the inner surface;
A plurality of inner guide rollers for guiding the inner circle side portion of the endless belt in an arc shape by sliding contact with the outer surface;
A connecting means for connecting the door body and the endless belt;
The inner surface of the toothed belt is composed of a tooth portion and a flat portion formed in a width direction portion of the inner surface,
An opening / closing device for a circular door, characterized in that a peripheral surface of the outer guide roller is composed of a concave portion that receives the tooth portion in a manner that does not mesh with the guide portion and a guide surface that is in sliding contact with the flat portion. The inner surface of the toothed belt has a flat portion formed at both ends in the width direction and a tooth portion formed between the flat portions, and the peripheral surface of the outer guide roller is a guide formed at both the upper and lower ends. A circular door having a surface and a recess formed between the guide surfaces, wherein the outer guide roller is in sliding contact with the flat surface in a state where the tooth portion is received in the recess. Switchgear. The opening / closing device for a circular door according to claim 1, wherein a tooth portion of the toothed belt is received in a non-contact manner in a concave portion of the outer guide roller. 4. The opening / closing device for a circular door according to claim 1, wherein the inner guide roller and the outer guide roller have the same shape.

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