Automatic door

Abstract

To provide a low noise automatic door having excellent durability while using a chain excellent in power transmission capacity and fire protection performance more than a belt to a winding transmission part.SOLUTION FOR THE PROBLEM: An automatic door comprises: a first door; a drive sprocket; a follower pulley; and a winding transmission part wound around the drive sprocket and the follower pulley, and transmitting the driving force of the drive sprocket to the first door. In the winding transmission part, the part to be engaged with the drive sprocket and the vicinity thereof are made up of a chain, and the parts other than those are made up of a wire rope.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an automatic door, and more particularly to an automatic door that uses a chain in a winding transmission part for driving the door, and is also compatible with fire doors and heavy doors. [Background technology]

[0002] Automatic doors equipped with automatic closing devices for fire prevention often use metal chains, which have better fire resistance than V-belts or timing belts, in their winding transmission parts (Patent Document 1). Chains, which have a higher ability to transmit power more reliably than V-belts or timing belts, are also often used to drive heavy doors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2006-233628 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional automatic doors that use chains in their power transmission section have had the problem of making louder noises when opening and closing the door compared to automatic doors that use V-belts or timing belts. Specifically, when sprockets are used on both the drive and driven sides and the power transmission section is made up of only chains, collision noises between the chain rollers and the sprocket teeth are generated from both the drive and driven sides. In addition, there are problems with the chain coming into contact with nearby components such as hangers and door rollers, due to vibrations of the chain as it rotates and slack caused by its own weight when the direction of rotation of the chain changes, generating loud contact noises. An object of the present invention is to provide an automatic door that is quiet and has excellent durability while making use of the fire prevention performance and power transmission capacity of a chain. [Means for solving the problem]

[0005] In order to solve the above problem, the first aspect of the automatic door comprises a first door, a drive sprocket, a driven pulley, and a winding transmission part that is wound around the drive sprocket and the driven pulley and transmits the driving force of the drive sprocket to the first door, and the winding transmission part is made of a chain at the part that meshes with the drive sprocket and the vicinity thereof, and the remaining part is made of a wire rope.

[0006] As a result, the driven pulley side becomes a wire rope transmission, and although the intermittent noise that occurs continuously due to collisions between the chain rollers and the sprocket teeth still occurs on the drive side, it no longer occurs on the driven side. Also, since the collision noise between the chain rollers and the sprocket teeth is louder and more harsh on the driven side than on the drive side, this has an audible noise reduction effect that goes beyond the effect of reducing the source of the continuously occurring intermittent collision noise from two places on the drive side and driven side to one.

[0007] In the automatic door of the second aspect, in contrast to the first aspect, the first door is connected to the chain below the wrapping transmission part, and opens and closes by the rotation of the drive sprocket.

[0008] When the first door is connected to the chain below the wrapping transmission part in this way, the lower chain is fixed at a predetermined height relative to the first door by the chain grip, making it easier to ensure a gap between the chain and the hanger part above the first door. Also, because the chain below the wrapping transmission part moves in the same direction as the first door at approximately the same speed, even if the hanger part of the first door comes into contact with the chain, no continuous loud noise will be generated.

[0009] The automatic door of the third aspect is different from the second aspect in that it further comprises a second door, which is connected to the wire rope above the wrapping transmission part and opens and closes by the rotation of the drive sprocket.

[0010] When the second door is connected to the wire rope above the winding transmission part in this way, the hanger part at the top of the second door and the wire rope below the winding transmission part move in opposite directions at approximately the same speed. However, because the wire rope is thin, lightweight, and has little flex due to its own weight, the gap between the hanger part at the top of the second door and the wire rope below is larger than with a chain, making them less likely to come into contact. Furthermore, because the wire rope is not constructed with many connected metal links like a chain, but has a lightweight and continuous structure, even if the hanger part of the second door and the wire rope below come into contact while moving in opposite directions, it does not generate the loud noise that a chain would.

[0011] The automatic door of the fourth aspect, compared to the second aspect, further comprises a first door leading-side hanger and a first door trailing-side hanger disposed on the top of the first door, and the first door is connected to the chain between the first door leading-side hanger and the first door trailing-side hanger.

[0012] As a result, the automatic door of the fourth aspect is connected to the chain by a chain gripper located closer to the trailing edge of the door, compared to when the first door is connected to the chain near the leading edge hanger. Therefore, in the fourth aspect, the length of the chain between the chain gripper that holds the chain at a predetermined height and the drive sprocket is shorter, and slack in the chain due to its own weight is also reduced. This further prevents the chain from coming into contact with the trailing edge hanger or trailing edge door roller of the first door.

[0013] The automatic door of the fifth aspect is different from any of the second to fourth aspects in that it further comprises a trailing edge roller of the first door arranged on the trailing edge hanger of the first door, and a chain support arranged near the trailing edge roller of the first door to support the chain from below.

[0014] When the chain changes direction of rotation, slack occurs in the chain due to its own weight, causing the chain to collide with the trailing-end hanger or trailing-end door roller of the first door, generating an impact noise. However, in the fifth aspect, a chain support is provided on the hanger portion near the trailing-end door roller of the first door, and the chain support supports the rotating chain from below. This suppresses slack in the chain when the rotation direction changes, preventing the chain from colliding with the trailing-end hanger or trailing-end door roller of the first door. As a result, the fifth aspect does not generate an impact noise. Because the chain support moves in the same direction as the chain at approximately the same speed, it does not become a new source of noise as long as the chain support continues to support the chain.

[0015] In a sixth aspect of the automatic door, in addition to any one of the first to fourth aspects, the wire rope is made of twisted stainless steel wires.

[0016] In the sixth embodiment, the wire rope is made of metal and is made of stainless steel wires with excellent fire resistance, so it can also be used for automatic doors used as fire doors.

[0017] The automatic door of the seventh embodiment differs from the sixth embodiment in that the wire rope is made by twisting together 7 strands of wire, each of which is made up of 19 stainless steel wires twisted together.

[0018] The wire rope used in the seventh aspect is made of 7 strands of 19 stainless steel wires twisted together, and the twisted wire rope is flexible and has excellent fatigue properties, so noise at the driven pulley can be kept low and there are no problems with durability.

[0019] The automatic door of an eighth aspect is the automatic door of any one of the first to fourth aspects, further comprising an abrasion powder storage section disposed below the driven pulley.

[0020] In the automatic door of the eighth aspect, most of the wear powder generated by the sliding of the driven pulley and wire rope is contained inside the wear powder container located below the driven pulley. This drastically reduces the amount of wear powder that falls onto and adheres to the upper rail, the hanger parts at the top of the first and second doors, and the door rollers, improving the durability of the door rollers and preventing the generation of abnormal noise due to unstable running of the door rollers.

[0021] In the automatic door of the ninth aspect, compared to the eighth aspect, the wear powder storage section is formed in a box shape with an opening at the top, and the lower part of the driven pulley is arranged so that it fits inside the wear powder storage section through the opening.

[0022] In the automatic door of the ninth aspect, the wear powder storage section can reliably store wear powder generated as the driven pulley and wire rope slide, and the automatic door can be easily attached and manufactured at low cost. [Effects of the Invention]

[0023] The present invention makes it possible to provide an automatic door that is quiet and has excellent durability while maintaining the fire prevention performance and power transmission capacity of a chain. [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are front views showing the operation of the automatic door 1 according to the first embodiment of the present invention, where (a) shows the closed state and (b) shows the fully open state. [Figure 2] 1 is a schematic diagram showing the relationship between the chain support 17 attached to the trailing edge hanger 12b of the first door of an automatic door 1 according to the first embodiment of the present invention and the chain 6, where (a) is a front view and (b) is an AA cross-sectional view. [Figure 3] 1A and 1B show a wire rope 7 used in an automatic door 1 according to a first embodiment of the present invention, where (a) is a perspective view and (b) is a cross-sectional view. [Figure 4] FIG. 1 is a perspective view illustrating the structure of a driven pulley block 21 of an automatic door 1 according to a first embodiment of the present invention. [Figure 5] 1A and 1B show a driven pulley block 21 with a wire rope 7 wound around a driven pulley 5 of an automatic door 1 according to a first embodiment of the present invention, where (a) is a front view and (b) is a side view. [Figure 6] 10A and 10B are front views showing the operation of an automatic door 30 according to a second embodiment of the present invention, where (a) shows the closed state and (b) shows the fully open state. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of an automatic door (1, 30) according to the present invention will be described with reference to the drawings. (First embodiment) An automatic door 1 according to a first embodiment of the present invention will now be described. Figure 1 is a front view showing the operation of the automatic door 1, with Figure 1(a) showing the closed state and Figure 1(b) showing the fully open state. The automatic door 1 is a single-side sliding door that opens and closes the first door 11, and fixtures and other components are not shown.

[0026] (Problems with conventional automatic doors that use chains) The automatic door 1 is compatible with fire doors and heavy doors that use a chain in the winding transmission section for door drive, and is designed to minimize noise primarily caused by the chain while maintaining its fireproof performance, power transmission capacity for heavy doors, and durability. Traditionally, chain-related noise was mainly generated when the chain engaged with the sprocket, but recently, in order to improve the appearance of the automatic door 1, a smaller visibility dimension H of the interlock 2 is required, which means that there is no longer a sufficient gap between the chain and the hanger or door roller at the top of the door, and the noise caused by contact between them is no longer negligible.

[0027] (The effect of combining a chain and wire rope in the winding transmission section) To solve these problems, the automatic door 1 of Fig. 1 according to the first embodiment of the present invention has a drive sprocket 4 attached to the output shaft of a drive unit 3 disposed inside the interlock 2, a driven pulley 5 disposed inside the interlock 2, and a winding transmission unit 9 that is looped around the drive sprocket 4 and the driven pulley 5 and transmits the driving force of the drive sprocket 4 to the first door 11. The winding transmission unit 9 is made up of a chain 6 at the part that meshes with the drive sprocket 4 and the vicinity thereof, and a wire rope 7 for the rest of the part. The chain 6 and the wire rope 7 are connected at two points: a first connection 8a at the top of the winding transmission unit 9 and a second connection 8b at the bottom. Conventional automatic doors use a driven sprocket on the driven side, and the power transmission section is composed only of a chain. As a result, when the door is driven, the collision between the chain roller and the sprocket teeth causes continuous, loud intermittent noise on both the drive and driven sides. In contrast, the automatic door 1 of this invention uses a wire rope transmission on the driven side, combining a driven pulley 5 and a wire rope 7. As a result, while the continuous intermittent noise caused by the collision between the chain roller and the teeth of the drive sprocket 4 still occurs on the drive side, it no longer occurs on the driven side, significantly reducing noise. Meanwhile, because the drive side uses the same drive sprocket 4 and chain 6 as before, there are no problems with power transmission capacity to handle heavy doors.

[0028] (Additional effect of using a wire rope on the driven side) Furthermore, when the noise of many conventional automatic doors was measured, it was confirmed that the collision sound caused by the chain and sprocket was significantly louder and more irritating on the driven side than on the drive side. In the case of a chain drive, even if the drive sprocket with a tooth count of Z rotates at a constant speed, it is known that the chain speed fluctuates periodically, in principle, just as when a belt is wrapped around it in a Z-shape. In other words, unlike the drive sprocket, the driven sprocket is rotated by a chain whose speed fluctuates periodically even when no load is applied to drive the door. Therefore, in relation to the moment of inertia of the driven sprocket, the way the chain rollers and the teeth of the driven sprocket come into contact is unstable, which is thought to be why the noise is louder and more irritating. In other words, with conventional automatic doors, the intermittent collision noise that occurs continuously due to the chain and sprocket occurs from two locations: the drive sprocket and the driven sprocket. In contrast, the automatic door 1 according to the first embodiment of the present invention uses a driven pulley 5 instead of a driven sprocket. Therefore, the intermittent collision noise that occurs continuously occurs from only one location, the drive sprocket 4, due to the chain 6 and drive sprocket 4, resulting in a significant noise reduction effect. Furthermore, because the intermittent collision noise on the driven side, which is more harsh on the ears than the drive side, does not occur, an even greater noise reduction effect is achieved in terms of audibility.

[0029] (Automatic Door 1 Configuration) The first door 11 of the automatic door 1 in Figure 1 is suspended from an upper rail 14 by first door leading-side door rollers 13a and 13b, which are respectively incorporated into the first door leading-side hanger 12a and the first door trailing-side hanger 12b of the first door hanger section 12 disposed at the top. The first door 11 is also connected to the lower chain 6 of the winding transmission unit 9 by a chain grip 15 attached to the first door middle hanger 12c. The first door 11 opens and closes as the drive sprocket 4, which outputs the driving force of the drive unit 3 controlled by a controller 10 disposed inside the interlock 2, rotates. 1, there is one each of the leading door roller 13a and trailing door roller 13b of the first door, but this is not limited to this and may be changed as appropriate depending on the mass of the first door 11, etc. Also, although the chain grip 15 is attached to the middle hanger 12c of the first door, this is not limited to this and it goes without saying that it may be attached directly to the top of the first door 11, or to the leading door hanger 12a or trailing door hanger 12b of the first door.

[0030] (Reason for connecting the first door to the lower chain) When the first door 11 is connected to the chain 6 below the wrapping transmission unit 9 in this way, the lower chain 6 is fixed at a predetermined height relative to the first door 11 by the chain gripper 15, making it easier to ensure a gap between the chain 6 and the hanger portion 12 of the first door. This also reduces the likelihood of noise being generated due to contact between the chain 6 and the hanger portion 12 of the first door. Furthermore, the chain 6 below the wrapping transmission unit 9 moves in the same direction as the first door 11 at approximately the same speed. Therefore, even if the chain 6 becomes loose and the hanger portion 12 of the first door comes into contact with the chain 6, only noise will be generated at the moment of contact; the hanger portion 12 of the first door and the chain 6 will not continue to move in opposite directions while remaining in contact, causing continuous loud noise.

[0031] (Reason for not connecting the first door to the upper chain) Conversely, if the first door 11 is connected to the chain 6 above the wrapping transmission unit 9, the upper chain 6 is fixed at a predetermined height relative to the first door 11 by the chain gripper 15, but the lower chain 6 cannot be fixed at a predetermined height relative to the first door 11. As a result, the lower chain 6 tends to slacken downward and come into contact with the hanger part 12 of the first door. Furthermore, the chain 6 on the lower side of the wrapping transmission unit 9 moves in the opposite direction to the first door 11 at approximately the same speed. Therefore, if the hanger part 12 of the first door comes into contact with the chain 6, the hanger part 12 of the first door and the chain 6 will continue to move in the opposite direction while remaining in contact, which can easily generate continuous loud noise.

[0032] (Chain grip location) 1, a chain gripper 15, which is connected to the lower chain 6 of the winding transmission unit 9 and fixes the lower chain 6 at a predetermined height, is disposed between the leading door roller 13a of the first door and the trailing door roller 13b of the first door. Also, a second connection part 8b, which connects the chain 6 and wire rope 7 on the lower side of the winding transmission unit 9, is disposed between the leading door hanger 12a of the first door and the chain gripper 15.

[0033] (The effect of placing the chain grip between the door rollers at the door end and the door tail) As such, the chain 6 is not present above the first door's leading-side hanger 12a or the first door's leading-side roller 13a, so noise is not generated by contact between the chain 6 and these elements. Also, compared to when the chain grip 15 is provided on the first door's leading-side hanger 12a, the position of the chain grip 15 that secures the lower chain 6 at a predetermined height is closer to the first door's trailing-side hanger 12b or the first door's trailing-side roller 13b. This reduces slack in the lower chain 6, making it less likely that noise will be generated by contact between the chain 6 and the first door's trailing-side hanger 12b or the first door's trailing-side roller 13b. 1(a), when the first door 11 moves in the opening direction, the lower chain 6 is in tension, making it less likely to come into contact with the trailing-end hanger 12b of the first door or the trailing-end door roller 13b of the first door. On the other hand, as shown in FIG. 1(b), when the first door 11 starts to move in the closing direction from a fully open state, the lower chain 6 switches to slack, causing slack in the chain 6. However, at this time, the distance between the chain grip 15 and the drive sprocket 4 is short, keeping the amount of slack small, so noise caused by contact between the chain 6 and the trailing-end hanger 12b of the first door or the trailing-end door roller 13b of the first door is less likely to be generated.

[0034] (Chain support configuration) Furthermore, in the automatic door 1 of Fig. 1, a chain support 17 that supports the lower chain 6 from below is disposed in the vicinity of the trailing edge hanger 12b of the first door and the trailing edge door roller 13b of the first door. An enlarged view of the area around the trailing edge hanger 12b of the first door, including the chain support 17, is shown in Fig. 2, where Fig. 2(a) is a front view and Fig. 2(b) is an AA cross-sectional view. 2, the chain support 17 is fixed with screws to the trailing edge hanger 12b of the first door near the trailing edge roller 13b of the first door together with the first door intermediate hanger 12c. The chain support 17 supports the roller portion of the chain 6 near the trailing edge roller 13b of the first door from below to keep the chain 6 at a predetermined height so that the chain 6 does not come into contact with the trailing edge hanger 12b of the first door or the trailing edge roller 13b of the first door when the lower chain 6 becomes slack. In FIG. 2, the chain support 17 is fixed to the trailing edge hanger 12b of the first door near the trailing edge roller 13b of the first door together with the intermediate hanger 12c of the first door. However, the intermediate hanger 12c of the first door may be omitted. In that case, the chain support 17 may be fixed directly to the trailing edge hanger 12b of the first door, or directly to the top of the first door 11. Furthermore, the height of the chain support 17 is usually set to the height of the center of the design. However, if the chain 6 still comes into contact with the trailing edge hanger 12b of the first door or the trailing edge roller 13b of the first door, the chain support 17 may be set slightly higher than the height of the center of the design. Conversely, if there is sufficient clearance between the chain 6 and the trailing edge hanger 12b of the first door or the trailing edge door roller 13b of the first door, the height of the chain support 17 may be lowered, but it is preferable that the chain support 17 and the chain 6 are in constant contact to prevent noise. Furthermore, the height of the chain support 17 may be adjustable.

[0035] (Effect of chain support) By arranging the chain support 17 in the vicinity of the trailing edge door roller 13b of the first door in this manner, it is possible to prevent noise caused by the lower chain 6 coming into contact with the trailing edge door hanger 12b of the first door or the trailing edge door roller 13b of the first door. The chain support 17 moves in the same direction as the chain 6 at approximately the same speed while supporting the lower chain 6 from below, so there is no noise caused by the relative movement between the chain support 17 and the chain 6, and no wear occurs, so there is no need to worry about deterioration over time.

[0036] (Wire rope configuration) Figure 3 shows the wire rope 7 used in the automatic door 1, with (a) being a perspective view and (b) being a cross-sectional view. The wire rope 7 is made of stainless steel wires twisted together. More specifically, the wire rope 7 is also called a (7x19) rope, which is made by twisting together 7 strands of 19 stainless steel wires.

[0037] (Reasons for choosing wire rope and other options) Conventionally, wire ropes used for winding transmissions include those called (6x7), which are made by twisting together seven stainless steel wires to form six strands, and twisting them around a core of hemp thread for flexibility. However, because of the use of hemp thread, this type of wire rope is unsuitable for fire-resistant automatic doors. Furthermore, the standard type of wire rope made of only stainless steel wires is called (7x7), which is made by twisting together seven stainless steel wires to form seven strands, and twisting these strands even further. However, this type of wire rope lacks flexibility for winding transmissions in automatic doors with large winding angles. There are also wire ropes coated with resins such as nylon, but these are also unsuitable for fire-resistant automatic doors. In contrast, the wire rope 7 used in the automatic door 1 is made entirely of stainless steel wire and is ideal for fire protection without a resin coating. Furthermore, the wire rope 7, which is made by twisting together 7 strands of 19 stainless steel wires, is highly flexible, making it easy to wind around the driven pulley 5. Furthermore, this wire rope 7 has not experienced any practical problems, including breakage, even in durability tests of over 1 million cycles, and has excellent fatigue properties, making it extremely suitable for use as the wire rope 7 in the automatic door 1. When used for purposes other than fire protection, such as automatic doors for heavy doors, wire ropes 7 may be used, such as (7x19) wire ropes 7 made of twisted stainless steel wires, with a resin coating of nylon or the like applied to the outer periphery to improve abrasion resistance. In another embodiment, wire ropes 7 may be used, such as (6x7) or (6x19) wire ropes, in which fibers such as hemp yarn are used only for the core material to give flexibility.

[0038] (Configuration of driven pulley block and method of adjusting tension of winding transmission part) Next, the configuration of the driven pulley block 21, which is disposed at the left end inside the interlock 2 of the automatic door 1 in FIG. 1 and includes the driven pulley 5 and the wear powder storage section 16, will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view illustrating the outline of the structure of the driven pulley block 21 of the automatic door 1. The driven pulley block 21 is fixed inside the door frame 2 by fastening a driven pulley block mounting plate 22, one of its components, with four driven pulley block mounting screws 25. The tension adjustment plate 23, to which the driven pulley 5 is rotatably fixed, has four elongated holes and is fixed to the driven pulley block mounting plate 22 with four screws (two tension adjustment screws 26 and two wear debris container mounting / tension adjustment screws 27) so that its position can be adjusted relative to the driven pulley block mounting plate 22 in the direction of the arrow in the figure. This position adjustment is performed to adjust the center distance between the drive sprocket 4 and the driven pulley 5 and thereby adjust the tension of the winding transmission unit 9, which includes the chain 6 and wire rope 7. To adjust the tension, slightly loosen the four screws securing the tension adjustment plate 23, move the plate 23 to a position where the tension of the winding transmission unit 9 is appropriate, and then retighten the four screws.

[0039] (Alternative method for adjusting the tension of the winding transmission part) This method makes it relatively easy to adjust the tension of the wound power transmission part 9, which includes the chain 6 and the wire rope 7. Although details are omitted, the tension of the wound power transmission part 9 may be adjusted by additionally disposing a compression coil spring or the like for adjusting the tension between the driven pulley block mounting plate 22 and the tension adjustment plate 23 and adjusting the compression coil spring to a predetermined length. As another method, the tension of the wound power transmission part 9, which includes the chain 6 and the wire rope 7, may be adjusted by cutting out a portion of the wound power transmission part 9, which includes the chain 6 and the wire rope 7, attaching a turnbuckle for adjusting the tension therein, and adjusting the length of the turnbuckle.

[0040] (Outline of the wear debris collection section) As shown in Figure 4, a box-shaped wear debris container 16 with an opening at the top is located below the driven pulley 5. It contains wear debris generated at the contact point between the driven pulley 5 and the wire rope 7, preventing it from scattering around. This prevents wear debris from adhering to the upper rail 14 and the leading door roller 13a of the first door, which could adversely affect the running performance and durability of the door, including noise generated when the leading door roller 13a of the first door runs. Two wire rope passages 24 are provided on both sides of the wear debris container 16, through which the lower part of the wire rope 7 wound around the driven pulley 5 passes. This allows the same wear debris container 16 to be used whether the automatic door 1 is a left-hand or right-hand door.

[0041] (Effect of wear debris collection section) Without the wear debris storage unit 16, after the first door 11 was opened and closed tens of thousands of times, significant wear debris was found on the upper surface of the upper rail 14 and the running surface of the leading door roller 13a of the first door, and the running surface had turned black overall. On the other hand, when the wear debris storage unit 16 was provided, even after the first door 11 was opened and closed 1 million times, the wear debris was stored inside the wear debris storage unit 16, and almost no wear debris was found on the upper surface of the upper rail 14 or the running surface of the leading door roller 13a of the first door, and no adverse effects were observed on the running performance or durability of the leading door roller 13a of the first door, demonstrating the effectiveness of the wear debris storage unit 16. When considering the maintenance of the automatic door 1, replacing the driven pulley 5 is easier than replacing the wire rope 7. Furthermore, if the wire rope 7 breaks, there is a high possibility that the first door 11 will not move at all, whereas if the driven pulley 5 is worn, there is a high possibility that the first door 11 will be able to move to some extent. Therefore, it is preferable that the wear debris generated from the sliding portion between the driven pulley 5 and the wire rope 7 is mainly wear debris from the driven pulley 5, and the driven pulley 5 may be made of, for example, carbon steel for machine construction that has been treated with trivalent chromate. However, as long as various conditions are met, the material and finish of the driven pulley 5 are not limited to these and can be selected as appropriate.

[0042] (Relationship between tension adjustment and wear debris collection section) Figure 5 shows the driven pulley block 21 with the wire rope 7 wound around the driven pulley 5 of the automatic door 1, with (a) being a front view and (b) being a side view. In Figure 5, the wear particle container 16 is fixed to the driven pulley block mounting plate 22 together with the tension adjustment plate 23 by two wear particle container mounting (and tension adjustment) screws 27. As shown in Figure 5, even if the driven pulley 5 moves left and right by adjusting the tension of the winding transmission part 9, the wear particle container 16 does not move and its position does not change. However, the mounting hole of the wear particle container 16 may be an elongated hole similar to that of the tension adjustment plate 23, so that the relative position of the wear particle container 16 and the driven pulley 5 does not change even if the driven pulley 5 moves left and right by adjusting the tension of the winding transmission part 9, allowing the position of the wear particle container 16 to be adjusted. This eliminates the need to allow for a margin for relative positional deviation between the wear debris receiving portion 16 and the driven pulley 5, allowing the width of the wear debris receiving portion 16 when viewed from the front to be reduced.

[0043] (Details of the wear debris collection section) As shown in FIGS. 4 and 5 , the wear debris storage compartment 16 is box-shaped with an opening at the top, and is positioned so that the lower part of the driven pulley 5 fits inside the wear debris storage compartment 16 through the opening at the top. By positioning the wear debris storage compartment 16 near the driven pulley 5, which generates wear debris, the wear debris can be caught before it scatters far away, allowing the small size of the wear debris storage compartment 16 to reliably store the wear debris inside the box-shaped compartment. The height of the box-shaped portion of the wear debris storage compartment 16 is higher than the height of the wire rope 7, excluding the wire rope passage 24, and a raised box-shaped portion is also provided below the wire rope passage 24 to more reliably store the wear debris. In addition, the wear debris storage compartment 16 of the first embodiment has an internal dimension of the box-shaped portion, viewed from the front, that is larger than the outer diameter of the driven pulley 5 plus the relative positional deviation between the wear debris storage compartment 16 and the driven pulley 5 due to tension adjustment of the winding transmission unit 9, thereby further reliably storing the wear debris. If the relative position between the wear debris storage section 16 and the driven pulley 5 is adjustable, the inner dimensions of the box-shaped portion of the wear debris storage section 16 as viewed from the front may be slightly larger than the outer diameter of the driven pulley 5.

[0044] The above is a summary of the automatic door 1 according to the first embodiment of the present invention. In the above explanation, the automatic door is a single-sliding door in which the first door 11 opens to the right when viewed from the front, but it goes without saying that the present invention can also be applied to a single-sliding automatic door in which the first door 11 opens to the left when viewed from the front, with a symmetrical arrangement.

[0045] (Second embodiment) An automatic door 30 according to a second embodiment of the present invention differs from the automatic door 1 according to the first embodiment only in that a second door 31 is added, and the first door 11 and the second door 31 are double-sliding automatic doors that open in opposite directions. Therefore, in the second embodiment, only the different configuration will be described, and the other configurations will not be described as they are the same as those of the first embodiment.

[0046] (Differences between the second embodiment and the first embodiment) An automatic door 30 according to a second embodiment of the present invention will now be described. Figure 6 is a front view showing the operation of the automatic door 30, with Figure 6(a) showing the closed state and Figure 6(b) showing the fully open state. The automatic door 30 is a double-pull sliding door that opens and closes the second door 31 in addition to the first door 11, and fixtures and other components are not shown. The configuration of the automatic door 30 of the second embodiment shown in Figure 6 related to the first door 11 is the same as that of the automatic door 1 of the first embodiment, except that the positions of the driven pulley 5 and the wear debris storage section 16 have been moved above the door end when the added second door 31 is open.

[0047] (Configuration added in the second embodiment) The second door 31 of the automatic door 30 in Figure 6 is suspended from the upper rail 14 by second door leading-side door rollers 33a and 33b, which are respectively incorporated into the second door leading-side hanger 32a and the second door trailing-side hanger 32b of the second door hanger section 32 disposed at the top. The second door 31 is also connected to the upper wire rope 7 of the winding transmission unit 9 by a wire rope gripper 35 attached to the second door intermediate hanger 32c. The second door 31 opens and closes together with the first door 11 as the drive sprocket 4, which outputs the drive force of the drive unit 3 controlled by the controller 10 disposed inside the interlock 2, rotates. 6, there is one each of the leading door roller 33a of the second door and the trailing door roller 33b of the second door. However, the number is not limited to this and may be changed as appropriate depending on the mass of the second door 31, etc. Also, although the wire rope grip 35 is attached to the middle hanger 32c of the second door, it is not limited to this and may, for example, be attached directly to the top of the second door 31, or to the leading door hanger 32a or trailing door hanger 32b of the second door.

[0048] (Effects of the second embodiment) The objective of the present invention is to provide an automatic door that utilizes the fire-resistant performance and power transmission capacity of a chain while producing low noise and maintaining durability. Like the automatic door 1 according to the first embodiment, the automatic door 30 according to the second embodiment of the present invention is constructed with a chain 6 at the portion of the winding transmission unit 9 that engages with the drive sprocket 4 and its surrounding area, and with a wire rope 7 at the other portion. Because the second door 31 is connected to the wire rope 7 for opening and closing, it does not generate additional noise related to the chain 6. Similarly to the automatic door 1 according to the first embodiment, the automatic door 30 according to the second embodiment is equipped with a wear debris container 16 below the driven pulley 5, preventing wear debris generated by sliding between the driven pulley 5 and the wire rope 7 from deteriorating the durability of the automatic door 30. The automatic door 30 according to the second embodiment of the present invention significantly reduces noise related to the chain 6 compared to conventional automatic doors. However, the configuration related to the first door 11, which is the main factor behind this reduction, is the same as that of the automatic door 1 according to the first embodiment, and therefore will not be described here.

[0049] The embodiments of the present invention have been described above in detail with reference to the drawings, but the specific configurations are not limited to these embodiments, and the present invention also includes design changes and the like within the scope of the present invention that do not deviate from the gist of the present invention. [Explanation of symbols]

[0050] 1: Automatic door according to the first embodiment 2:Mumei 3: Drive unit 4: Drive sprocket 5: Driven pulley 6: Chain 7: Wire rope 8a: First connection part 8b: Second connection part 9: Winding transmission part 10: Controller 11: First Door 12: Hanger part of the first door 12a: First door hanger 12b: First door end hanger 12c: Middle hanger of the first door 13a: First door roller 13b: Trailing door roller of the first door 14: Upper rail 15: Chain Grab 16: Wear debris collection section 17: Chain support 21: Driven pulley block 22: Driven pulley block mounting plate 23:Tension adjustment plate 24: Wire rope passage 25: Driven pulley block mounting screw 26: Tension adjustment screw 27: Wear debris collection unit mounting (and tension adjustment screw) 30: Automatic door according to the second embodiment 31: Second Door 32: Second door hanger 32a: Second door hanger 32b: Second door end hanger 32c: Second door middle hanger 33a: Second door front roller 33b: Second door trailing edge roller 35: Wire rope grip

Claims

1. The first door; A drive sprocket; A driven pulley; a winding transmission part that is wound around the drive sprocket and the driven pulley and transmits the driving force of the drive sprocket to the first door; and The automatic door is characterized in that the wrapping transmission part is made of a chain at the part that meshes with the drive sprocket and the vicinity thereof, and is made of a wire rope at the other part.

2. 2. The automatic door according to claim 1, wherein the first door is connected to the chain below the wrapping transmission part and opens and closes by rotation of the drive sprocket.

3. a second door; 3. The automatic door according to claim 2, wherein the second door is connected to the wire rope above the winding transmission part and opens and closes by rotation of the drive sprocket.

4. The door further includes a first door leading-side hanger and a first door trailing-side hanger disposed on an upper portion of the first door, 3. The automatic door according to claim 2, wherein the first door is connected to the chain between a hanger on the leading edge of the first door and a hanger on the trailing edge of the first door.

5. a trailing door roller of the first door disposed on a trailing door hanger of the first door; a chain support disposed near a trailing door roller of the first door and supporting the chain from below; 5. The automatic door according to claim 2, further comprising:

6. 5. The automatic door according to claim 1, wherein the wire rope is made of a strand of stainless steel wires.

7. 7. The automatic door according to claim 6, wherein the wire rope is made by twisting together 19 stainless steel wires to form 7 strands, which are then twisted together.

8. 5. The automatic door according to claim 1, further comprising a wear powder storage section disposed below the driven pulley.

9. The automatic door of claim 8, wherein the wear debris storage section is formed in a box shape with an opening at the top, and the lower part of the driven pulley is arranged so that it fits inside through the opening of the wear debris storage section.

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