HK1094689A1

HK1094689A1 - Platform door device

Info

Publication number: HK1094689A1
Application number: HK07100764.7A
Authority: HK
Inventors: 冈崎考志; 堤裕正
Original assignee: 纳博特斯克株式会社
Priority date: 2005-03-04
Filing date: 2007-01-22
Publication date: 2007-04-04
Also published as: CN100551751C; CN1833935A; JP4648729B2; TW200640725A; KR100764680B1; JP2006240529A; TWI282764B; KR20060096323A

Abstract

A device to prevent a rail cover from obstructing a guide rail supporting, and to avoid interference of the rail cover with the guide rail. The platform door device is provided with the linear rail 27 provided projectingly toward a door body at a mating door side from a door end on respective door bodies 16; a belt member 38 provided projectingly toward the door body at a mating door side from the door end on the respective door bodies 16; a driving pulley 52 for transmitting driving force for openingly/closingly moving the door body 16 to the belt member 38; the rail cover 28 having a shape for covering the linear rail; a slide block 46 for slidably supporting the linear rail 27 in the rail cover 28; and a support member 48 for supporting the slide block 46 from below the rail cover 28. Both rail covers 28 are set to different height not to interfere with each other and both belt members are set to different height not to interfere with each other even if both door bodies 16 are moved between the guide boxes 12.

Description

Platform door device

Technical Field

The present invention relates to a platform door device provided on a platform.

Background

Conventionally, a platform door device provided along a rail side edge portion of a platform in order to secure safety of passengers is known (for example, see patent document 1). As shown in fig. 7, the platform door device is configured to keep the door 95 closed when the train is not stationary, and to open and close the push-pull door 95 corresponding to the opening and closing of the upper and lower doors of the train when the train is stationary. The door body 95 is supported on the guide box 91 so as to be movable back and forth, and the guide box 91 is disposed with a wall body interposed therebetween so as to divide the platform into a track side and an inner side.

In the guide box 91, an opening/closing console 96 of the door 95, a guide rail 92, a motor 94, and a belt 93 driven by the motor 94 are disposed. A hook 97 is fixed to the door 95, and the hook 97 moves along the guide rail 92 by the movement of the belt 93, so that the door 95 moves in the opening and closing direction.

Patent document 1: japanese unexamined patent publication No. 2001-164833

The lateral width of the guide compartment is shorter than that of the door body, and when the door body opens the passage for getting on and off the vehicle, the door body protrudes between the adjacent guide compartments. In this case, since the guide rail is exposed, it is necessary to cover the guide rail with a rail cover in order to prevent foreign matter from adhering to the guide rail and to obtain a good appearance. In addition, in order to increase the width of the opening and closing movement of the door body, it is effective to make the guide rail and the rail cover protrude from the door rear end of the door body, and to support the protruding portion by the guide portion when the door body is at the closed position.

However, when the guide rail is covered with the rail cover, the rail cover becomes an obstacle, and it becomes difficult to support the guide rail by the guide portion. Further, when the guide rail and the rail cover protrude toward the door rear side, interference between the guide rail and the rail cover occurs between the adjacent guide cars, and in order to prevent the interference, the interval between the guide cars needs to be enlarged to some extent.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to prevent a rail cover from becoming a failure that a guide portion supports a guide rail, and to prevent the guide rail and the rail cover from interfering with each other when a door body moves in a guide compartment.

In order to achieve the above object, the present invention provides a platform door apparatus having a pair of guide compartments spaced apart from each other on a platform, each of the guide compartments movably supporting a door body such that each of the door bodies moves in and out with respect to the guide compartment, the apparatus comprising: linear guide rails provided on the door bodies, respectively, moving in a moving direction of the door bodies, and protruding from a door tail of the door body toward a door body on an object side; a long member provided on each of the door bodies, extending in a moving direction of the door body, and having one end portion provided closer to the door body on the target side than a door tail of the door body; drive members, respectively provided in the guide compartments, for transmitting a drive force for moving the door body in the moving direction to the long member; rail covers which are respectively arranged on the door bodies and are in shapes covering the upper part and the side part of the linear guide rail; support members provided in the guide compartments, respectively, each support member having a guide portion for slidably supporting the linear guide rail in the rail cover, and supporting the guide portion from below the rail cover, wherein portions of the two rail covers protruding from the door tail are set as: two of the long members are set to different heights so as not to interfere with each other even when the two door bodies are moved in the direction in which the door tails of the two door bodies approach each other in the guide compartments until the door tails of the two door bodies approach each other: the two door bodies are moved in the direction in which the door tails of the two door bodies approach each other in the guide compartment until the door tails of the two door bodies approach each other, and have different heights that do not interfere with each other.

In the present invention, the guide portion is supported from below the rail cover by the support member, and the linear guide is supported by the guide portion, so that the support state of the linear guide can be maintained, and foreign matter can be prevented from adhering to the linear guide, and a good appearance can be obtained. Further, since the two rail covers are disposed at mutually different height positions and the two long-sized portions are disposed at mutually different height positions, the two door bodies do not interfere with each other even if they move in the respective guide boxes. As a result, when the two door bodies move in the respective guide compartments, the two rail covers and the like are overlapped up and down to arrange the two guide compartments close to each other, and the platform door device of the present invention can be installed on a platform where a vehicle with a narrow upper and lower doorway stops stably.

The rail cover and the long member are arranged in a staggered manner in the thickness direction of the door bodies, and the rail cover provided on one door body and the long member provided on the other door body move in the direction in which the door tails of the two door bodies approach each other in the respective guide compartments until the door tails of the two door bodies approach each other, and are set to the height of the portion where the overlap occurs when viewed in the horizontal direction.

In this configuration, the vertical width of the region required for installation of the two rail covers and the two long members can be reduced as compared with a configuration in which the two rail covers and the two long members are not overlapped and are vertically displaced.

The two rail covers may be configured such that, of the rail covers, a notch is provided at a lower end portion of a portion protruding from the door tail and on an upper side of the rail cover on the subject side, and a part of the rail cover on the other side is inserted into the notch, and the two rail covers are set to: when two door bodies move in the direction that the door tails of the two door bodies approach each other in the respective guide compartments until the door tails of the two door bodies approach each other, the height of the overlapped part is generated when viewed in the horizontal direction.

In this configuration, since the two rail covers can be arranged in an overlapping relationship when viewed in the horizontal direction, the difference in installation height between the two rail covers can be set smaller.

Preferably, the long member has a shape that fits within a thickness range of the door body. Thus, the guide box can be made thinner than a structure in which a long member is disposed outside the door body in the thickness direction.

The long member may be a belt member having both ends fixed to the door body, the driving member may be a driving pulley provided on a driving shaft of the motor, a pair of idle pulleys may be provided on both sides of the driving pulley at the same height as the driving pulley, and the belt member may be wound around the driving belt and may pass between the driving pulley and the idle pulleys.

In this configuration, the driving force of the drive pulley can be efficiently transmitted to the belt member, while the vertical extent of the region required for installing the drive pulley and the idler pulley can be suppressed from increasing.

Further, each of the long members may be a belt member having both ends fixed to the door body, and the belt member may be disposed below the rail cover of the door body in which the belt member is disposed.

In this configuration, since the cover is provided, difficulty in maintenance can be prevented.

As described above, according to the present invention, the rail cover does not interfere with the guide portion to support the guide rail, and even if the interval between the guide compartments is reduced, the guide rail and the rail cover can be prevented from interfering with each other when the door body is moved to protrude between the guide compartments.

Drawings

FIG. 1 is a front view of an embodiment of a dock door apparatus of the present invention as viewed from the dock side;

fig. 2 is a sectional view of the above-described platform door apparatus viewed in the direction of the rail, and (a) shows the guide car on the left side of fig. 1, and (b) shows the guide car on the right side of fig. 1;

fig. 3 is an enlarged view of the interior of the guide box on the left side of fig. 1;

fig. 4 is a schematic view of the platform door apparatus of fig. 1 viewed from the rail side, showing a mounted state of the belt member, the support bracket, and the linear guide;

fig. 5 is a perspective view of the platform door apparatus of fig. 1 viewed from the track side, (a) showing the entire apparatus, (b) showing a rail cover provided on the door body on the left side of fig. 1, and (c) showing a rail cover provided on the door body on the right side of fig. 1;

FIG. 6 is a view showing a state where rail covers are overlapped;

fig. 7 is a schematic view of a conventional platform door device.

Detailed Description

The best mode for carrying out the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a front view of a platform door device 10 according to an embodiment of the present invention, as viewed from a platform side to a rail side. As shown in the figure, the lunar station door apparatus 10 includes: a pair of guide cars 12, 12 arranged at a predetermined interval along a rail-side end of the platform P; a partition plate 14 disposed between the guide boxes 12 and 12; a pair of push-pull type door bodies 16, 16 disposed in a state of penetrating the guide compartments 12, 12. By connecting a plurality of the platform door devices 10, the platform P is divided into a track side and a platform side inside the track side. In this state, the boarding/alighting passages 20, 20 through which boarding/alighting passengers of the train pass are opened/closed by opening/closing the door bodies 16, 16.

Each guide car 12 is erected on the platform P. The guide box 12 is formed in a vertically long shape and is formed in a cylindrical shape that can penetrate the door 16 in a track direction (a left-right direction in fig. 1). The width of the guide car 12 in the direction of the track is formed shorter than the width of the door body 16.

The door body 16 reciprocates in the direction of the guide rail between the open position and the closed position. The open position is a position where the door head 16a of the door body 16 is positioned near the passage-side end 12a of the guide compartment 12, and the door tail 16b of the door body 16 protrudes from the partition-side end 12b of the guide compartment 12 to open the boarding/alighting passage 20 on the door head side of the guide compartment 12. The closed position is a position where the door tail 16b of the door body 16 enters the guide compartment 12 and the door head 16a of the door body 16 protrudes outside the guide compartment 12 to close the entrance/exit passage 20.

In the left guide car 12 shown in fig. 1, the door 16 moves leftward from a left end portion, which is a passage-side end portion 12a, and closes the left entry/exit passage 20. On the other hand, in the right guide car 12, the door 16 moves rightward from the right end portion, which is the passage-side end portion 12a, and closes the right entrance/exit passage 20. The right end of the left door body 16 forms a door tail 16b, and the left end of the right door body 16 forms a door tail 16 b.

The two guide boxes 12 and 12 are provided at intervals at which the door tails 16b and 16b of the door body 25 do not interfere with each other when the two doors 16 and 16 open the boarding/alighting passage 20.

The partition plate 14 is formed of a rectangular plate, and is disposed so as to connect the partition-side ends 12b, 12b of the two guide boxes 12, 12 to each other. Thereby, the platform P is partitioned into a track side and a platform side as a waiting position for passengers getting on and off.

Next, the structure of the door 16 and the guide car 12 will be described with reference to fig. 2(a), (b), and fig. 3. Here, fig. 2(a) shows the left guide car (hereinafter, left guide car) 12 of fig. 1, and fig. 2(b) shows the right guide car (hereinafter, right guide car) 12 of fig. 1. Which are seen with the guide carriage 12 in the direction of the track, respectively. Hereinafter, the door penetrating the left guide box 12 is referred to as a left door 16, and the door penetrating the right guide box 12 is referred to as a right door 16. Fig. 3 is an enlarged view of the lower portion of the left guide box 12, as viewed from the platform side.

Each guide car 12 is formed in a cylindrical shape with both ends 12a, 12b opened in the direction of the track (the opening and closing direction of the door). In the guide box 12, the platform side wall portion 12e is formed in a flat plate shape, while the rail side wall portion 12f is bent in a stepped shape at an intermediate portion in the height direction thereof, whereby the upper side portion 12c of the stepped portion and the lower side portion 12d of the stepped portion are formed in shapes having different thicknesses in the door thickness direction. In this way, by forming the upper side portion 12c of the guide box 12 in a shape recessed toward the platform side with respect to the lower side portion 12d, a thickness capable of accommodating predetermined equipment in the guide box 12 is secured, and the installation can be performed close to the building boundary of the platform P.

The door 16 is provided in a range from the upper side portion 12c to the lower side portion 12d of the guide box 12, and as shown in fig. 2(a) and (b), includes a door body 25, a support bracket 26 attached to the door body 25, a linear guide 27 fixed to the support bracket 26, and a rail cover 28 attached to the door body 25. Fig. 3 shows a state where the rail cover 28 is omitted.

The door body 25 has a frame portion in which a vertical frame 25a extending vertically and a horizontal frame 25b extending horizontally are combined, and a horizontally extending intermediate frame 25c is bridged at an intermediate height position of the vertical frame 25 a. A glass plate 25d is fixed to an upper portion of the frame portion, i.e., an upper side portion of the intermediate frame 25 c. The door body 16 is supported at its upper end by guide rollers, not shown.

As shown in fig. 2(a) and (b), the horizontal frame 25b constituting the lower end portion of the door body 25 is disposed at a different height between the left door 16 and the right door 16. Specifically, the lower lateral frame 25b of the right door 16 is disposed above the lower lateral frame 25b of the left door 16. In the right door body 16, the lower lateral frame 25b is not joined to the lower end of the vertical frame 25a, but is an upper intermediate portion thereof (see fig. 4, when viewed from the rail side).

The metal plate 32 is fixed by caulking between the lower lateral frame 25b, the two vertical frames 25a, and the intermediate frame 25 c. A decorative plate 34 is detachably attached to the metal plate 32 on the platform side over the range from the intermediate frame 25c to the lower lateral frame 25 b.

The support bracket 26 has an elongated shape extending in the opening/closing direction of the door body 16, and as shown in fig. 2(a) and (b), includes a flat plate-shaped vertical portion 26a fastened and fixed in a state of being overlapped with the metal plate 32, and a flat plate-shaped horizontal portion 26b fixed to an intermediate height portion of the vertical portion 26 a. The vertical portion 26a overlaps the track side surface of the metal plate 32, and the horizontal portion 26b horizontally protrudes from the vertical portion 26a toward the track side. The metal plate 32 of the right door 16 has a height of about 2 times the height of the vertical portion 26a, and the metal plate 32 of the left door 16 has a height of about 2 times the height of the vertical portion. The support bracket 26 attached to the metal plate 32 of the left door body 16 is provided at a position lower than the support bracket 26 of the right door body 16.

The linear guide 27 is fastened ( fastened) to the lower surface of the lateral portion 26b and extends in the opening/closing direction over the entire length of the support bracket 26. The linear guide 27 has a guide groove formed in an intermediate portion of the side surface in the vertical direction. The guide grooves are provided on the left and right side surfaces, respectively, and are formed horizontally over the entire length of the linear guide 27.

The upper end of the rail cover 28 is fastened and fixed to the intermediate frame 25 c. That is, the upper end portion of the rail cover 28 is attached to the upper side of the support bracket 26 of the door body 25. Further, the rail cover 28 includes: a vertical surface portion 28a extending along the intermediate frame 25c in the vertical plane, an upper surface portion 28b bulging in an inclined shape from a lower end portion of the vertical surface portion 28a toward the rail side, and a side surface portion 28c extending downward from a lower end portion of the upper surface portion 28 b. The rail cover 28 is provided with end surface portions 28d (see fig. 5 and 6) at both ends of the upper surface portion 28b and the side surface portion 28c, respectively. The rail cover 28 covers the upper side, the side surfaces, and both the longitudinal sides of the linear guide 27 and the support bracket 26.

The vertical surface portions 28a of the two rail covers 28 are different in height width from each other. Therefore, the height positions of the upper surface portion 28b continuous with the lower end portion of the vertical surface portion 28a, the side surface portion 28c continuous with the upper surface portion 28b, and the end surface portion 28d are different between the two rail covers 28. Specifically, the upper surface portion 28b extends obliquely downward from just below the intermediate frame 25c in the rail cover (right side rail cover) 28 of the right side door body 16 (fig. 2(b)), and extends downward from the rail cover (left side rail cover) 28 of the left side door body 16, specifically, the upper surface portion 28b extends obliquely downward from the same height position as the lower end portion of the side surface portion 28c of the right side rail cover 28 (fig. 2 (a)). Therefore, the upper surface portion 28b of the left rail cover 28, and the side surface portion 28c and the end surface portion 28d of the right rail cover 28 are in a height relationship with each other in which the portions partially overlap each other when viewed in the horizontal direction.

Each door body 16 is provided with a belt member 38 as an example of a long member. The belt member 38 is provided in a posture extending in the moving direction of the door body, and is fixed to the lower lateral frame 25b via a belt bracket 30 (see fig. 3) at each of both ends thereof.

As shown in fig. 4, the lower lateral frame 25b protrudes from the vertical frame 25a on the door tail 16b side constituting the door tail end of the door body 25 toward the door body 16 on the target side. As a result, the end portion of the belt member 38 on the door end side is closer to the door body 16 on the target side than the door end of the door body 25.

The belt member 38 is a toothed belt and is disposed in a tooth-up posture. The belt member 38 is fixed to the lower surface of the lower lateral frame 25b via the belt bracket 30 at both ends and is disposed apart from the lateral frame 25 b. The belt members 38 are disposed below the rail cover 28 of the door body 16.

The belt members 38 are disposed at different heights in the left door body 16 and the right door body 16. Specifically, the belt member 38 of the left door body 16 shown in fig. 2(a) is disposed below the belt member 38 of the right door body 16 shown in fig. 2 (b).

The belt member 38 is thinner than the door body 25, and the belt member 38 is provided so as not to extend from the door body 25 to the outside. In other words, the belt member 38 is offset in the thickness direction of the door 16 from the rail cover 28 that bulges out toward the rail side from the door body 25.

As shown in fig. 3, an adjusting device 42 for adjusting the tension of the belt member 38 is provided on the belt bracket 30 on one side (door rear side in the drawing).

A maintenance window 40 that is opened when the belt member 38 is maintained or the like and exposes the belt member 38 is provided at a height position corresponding to the belt member 38 in a lower portion of the platform side wall portion 12e of the guide box 12.

A drive device 44 for opening and closing the drive door body 16 and a support member 48 for supporting the slider 46 as an example of a guide portion are housed in each rail cover 12.

A drive motor 50 as a drive source is incorporated in the drive device 44. The drive motor 50 is driven and controlled by a controller not shown. The controller controls the driving of the driving motor 50 based on a control signal transmitted from a station central console or the like in response to the stationary state of the train.

A drive pulley 52 as an example of a drive member is provided on an output shaft of the drive motor 50. The drive pulley 52 is disposed in a posture of rotating about a horizontal axis, and meshes with the belt member 38.

The support member 48 includes: the door opening/closing device includes leg portions 48a arranged on a bottom plate 54 at intervals in the door opening/closing direction, an attachment plate 48b arranged between the leg portions 48a, a support plate 48c fixed to the attachment plate 48b, and a mounting plate 48d fixed to the support plate 48 c.

The leg portions 48a are disposed close to the track side wall portion 12f in the guide car 12, and a plurality of the leg portions are provided at predetermined intervals in the door opening/closing direction. These leg portions 48a are set to a height corresponding to the arrangement height of the lower end portions of the rail cover 28. The leg 48a provided in the right guide box 12 shown in fig. 2(b) is formed to have a height higher than that of the leg 48a in the left guide box 12 shown in fig. 2 (a).

The support plates 48c are arranged at intervals in the door opening/closing direction, and the mounting plate 48d is mounted on these support plates 48 c. The slider 46 is fixed to the mounting plate 48 d. In other words, the slider 46 is supported from below by the mounting plate 48d disposed therebelow.

The sliders 46 are provided to guide the linear guide 27 and are arranged in parallel at a predetermined interval in the door opening/closing direction in the guide car 12.

A guide groove extending in the door opening/closing direction is formed in the upper surface of each slider 46. The guide groove is a groove for guiding the linear guide 27, and has a cross-sectional shape corresponding to the linear guide, so that the linear guide 27 slides in the longitudinal direction without being separated.

The mounting plate 48d and the slider 46 are disposed above the lower end portion of the rail cover 28, and they are disposed in the rail cover 28. On the other hand, the leg portion 48a, the attachment plate 48b, and the support plate 48c are disposed below the lower end portion of the rail cover 28, and are exposed from the rail cover 28 when viewed in the horizontal direction.

The drive motor 50 is fixed to the mounting plate 48b via a motor bracket 56. The drive motor 50 disposed in the left guide car 12 shown in fig. 2(a) has its drive shaft disposed below the door body 25, while the drive motor 50 disposed in the right guide car 12 shown in fig. 2(b) has its drive shaft disposed above the lower end of the door body 25.

A pulley bracket 58 is fixed to the mounting plate 48b and the support plate 48 c. The pulley bracket 58 has a flat plate portion 58a extending between the lower surfaces of the two support plates 48c, and a support portion 58b fastened to the flat plate portion 58a and rising from the flat plate portion 58a on both sides of the drive pulley 52. As shown in fig. 3, an idle runner 60 is rotatably supported on each support portion 58 b.

The two idle pulleys 60 are disposed on both sides of the drive pulley 52, and are disposed at the same height as the drive pulley 52. The belt member 38 passing under the drive pulley 52 is wound around the idle pulley 60 from above, and the belt member 38 is bent upward on both sides of the drive pulley 52. Therefore, the back surface side of the belt member 38 is wound around the idle pulley 60, and the belt member 38 is bent along the drive pulley 52 by the idle pulley 60, whereby the range in which the belt member 38 engages with the drive pulley 52 is enlarged.

As shown in fig. 4, the lower lateral frame 25b is provided in a state in which one end portion is coupled to the vertical frame 25a on the door head 16a side constituting the door head end of the door body 25 and the other end portion protrudes in the closing direction from the vertical frame 25a on the door tail 16 side constituting the door tail end of the door body 25. In other words, the lower lateral frame 25b is fixed in a state of protruding toward the target door 16. Fig. 4 is a view seen from the track side, and the left door body 16 is shown in fig. 2(a) in the right side view of fig. 4, and the right door body 16 is shown in fig. 2(b) in the left side view of fig. 4. In the same drawing, a part of the belt member 38 is drawn as being recessed downward, but it shows a portion wound around the drive pulley 52.

As shown in fig. 4, each support bracket 26 is provided in a state in which one end portion is coupled to the vertical frame 25a on the door head 16a side constituting the door head end of the door body 25 and the other end portion protrudes in the closing direction from the vertical frame 25a on the door tail 16 side constituting the door tail end of the door body 25. The two support brackets 26 are arranged at a height position where they do not interfere with each other.

As shown in fig. 5 and 6, the two rail covers 28 are also arranged such that the upper surface portion 28b, the side surface portion 28c, and the end surface portion 28d form different height positions. However, a part of the upper surface portion 28b of the rail cover 28 of the left door body 16 disposed on the lower side falls within the height range occupied by the side surface portion 28c of the rail cover 28 of the right door body 16 disposed on the upper side. Therefore, the edge surface 28d of the rail cover 28 of the right door body 16 is provided with the notch 28e at the lower corner thereof, thereby preventing the two rail covers 28 from interfering with each other.

The lower lateral frame 25b and the belt member 38 of the right door body 16 shown on the left side in fig. 4 are within the vertical height range of the rail cover 28 and the support bracket 26 of the left door body 16 shown on the right side in fig. 4. However, the lower lateral frame 25b, the belt member 38, the rail cover 28, and the support bracket 26 are displaced in the thickness direction of the door body 16, and therefore do not interfere with each other when the door body 16 is opened and closed.

Next, the operation of the platform door apparatus 10 of the present embodiment will be described.

First, in a normal state where the train is not stopped, the door bodies 16, 16 are at the closed positions, and the boarding/alighting passages 20, 20 are closed. Specifically, the left door 16 in fig. 1 is positioned leftward, and the right door 16 in fig. 1 is positioned rightward. Thus, passengers on the platform do not enter the track side, and the safety of the passengers can be ensured.

When the train is stationary, a control signal transmitted from the central control station or the like is input to the controller in each guide car 12 to drive the drive motor 50. Thereby, the drive pulley 52 rotates forward, for example, and the belt member 38 engaged therewith travels. Then, the two door bodies 16, 16 move in the direction of approaching each other, and the door tails 16b move to approach each other between the guide cars 12, thereby opening the boarding/alighting passage. At this time, the two rail covers 28 are at different height positions, and in the overlapping range, the other rail cover 28 passes through the cutout portion 28e formed in the end surface portion 28d, so that the two rail covers 28 do not interfere with each other. Further, the lower lateral frame 25b and the belt member 38 are located at different height positions on the left door body 16 and the right door body 16, and therefore do not interfere with each other. Further, the rail cover 28, the lower lateral frame 25b, and the belt member 38 are displaced in the thickness direction of the door body 16, and therefore do not interfere with each other.

As described above, according to the present embodiment, since the slider 46 is supported by the support member 48 from below the rail cover 28 and the linear guide 27 is supported by the slider 46, it is possible to prevent foreign matters from adhering to the linear guide 27 while maintaining the support state of the linear guide 27 and to improve the appearance. Further, since the two rail covers 28 are disposed at mutually different height positions and the two belt members 38 are disposed at mutually different height positions, when the two door bodies 16 move between the guide cars 12, the two rail covers 28 and the like can be overlapped to dispose the two guide cars 12 close to each other, and the present dock door apparatus 10 can be installed on a dock P where a vehicle with a narrow doorway is parked.

In the present embodiment, the belt member 38 and the rail cover 28 are displaced in the thickness direction of the door body 16, and the belt member 38 of the right door body 16 is accommodated within the range of the upper surface portion 28b and the side surface portion 28c of the rail cover 28 of the left door body 16 in the vertical direction, so that the vertical width of the region where the belt member 38 and the rail cover 28 are provided can be reduced as compared with a structure in which they are not overlapped and displaced in the vertical direction. In addition, in the present embodiment, since the driving pulley 52 and the idle pulley 60 are disposed in parallel in the horizontal direction and the belt member 38 is disposed horizontally except for the portion around which the driving pulley 52 is wound, the vertical width of the region necessary for mounting them can be reduced, and as a result, the height position of the intermediate frame 25c of the door body 25 can be set at a low position, and the area for mounting the glass plate 25d can be enlarged in the vertical direction. Therefore, better lighting can be realized.

In addition, in the present embodiment, since the belt member 38 is disposed within the thickness range of the door body main body 25, the thickness of the door body 16 can be reduced by such an amount, and the thickness of the lower portion side 12d of the guide box 12 can be reduced. As a result, the space occupied by the guide box 12 on the platform P can be further reduced.

In the present embodiment, since the belt member 38 is exposed below the rail cover 28, even if the belt member 38 required for maintenance is used, the trouble of maintaining and controlling the rail cover 28 can be suppressed.

In the above embodiment, the drive motor drives the belt member 38 to open and close the door 16, but instead, a long member may be formed of a rack, a pinion (drive member) may be provided on a drive shaft of the drive motor 50, and the rack and the pinion may be engaged with each other to transmit a driving force from the pinion to the rack, thereby opening and closing the door 16. In the configuration in which the rack is linearly arranged, an idler gear is not required, and therefore, a simple configuration is further provided. Further, the drive belt member 38 may be replaced with a long member formed of a chain member, and the drive pulley 52 may be replaced with a drive member formed of a sprocket.

In the above embodiment, the linear guide 27 is attached to the lower surface of the lateral portion 26b of the support frame 26, and the slider 46 is disposed in a posture in which the guide groove is formed in the upper surface, but instead, the lateral portion 26b of the support bracket may be omitted, and the linear guide 27 may be fixed to the vertical portion 26a of the support bracket 26, and the slider 46 may be disposed in a posture in which the guide groove is formed in the side surface. In this case, the slider 46 may be fixed to the mounting plate 48 d.

Claims

1. A dock door apparatus having a pair of guide compartments spaced apart from each other on a dock, each of the guide compartments movably supporting a door body such that each door body can enter and exit with respect to the guide compartment, comprising: linear guide rails provided on the door bodies, respectively, extending in a moving direction of the door bodies, and protruding from door tails of the door bodies toward a door body on an object side; a long member provided on each of the door bodies, extending in a moving direction of the door body, and having one end portion thereof provided closer to the door body on the target side than a door tail of the door body; drive members, provided in the guide compartments, respectively, for transmitting a drive force for moving the door body in the moving direction to the long member; rail covers which are respectively arranged on the door bodies and are in shapes covering the upper part and the side part of the linear guide rail; support members provided in the guide compartments, respectively, each having a guide portion slidably supporting the linear guide rail in the rail cover, and supporting the guide portion from below the rail cover,

the parts of the two rail covers protruding from the door tail are formed as follows: different heights that do not interfere with each other even when the two door bodies move in the direction in which the door tails of the two door bodies approach each other in the guide compartments until the door tails of the two door bodies approach each other,

two of the long-sized members are formed as follows: the two door bodies are moved in the direction in which the door tails of the two door bodies approach each other in the guide compartment until the door tails of the two door bodies approach each other, and have different heights that do not interfere with each other.

2. The dock door apparatus of claim 1, wherein the rail cover and the long member are disposed offset in a thickness direction of the door bodies, and the rail cover provided on one of the door bodies and the long member provided on the other of the door bodies are formed such that: when the two door bodies respectively move towards the direction that the door tails of the two door bodies are close to each other in the respective guide compartments until the door tails of the two door bodies are close to each other, the height of the overlapped part is seen along the horizontal direction.

3. The dock door apparatus according to claim 1, wherein, of the two rail covers, a notch portion is provided at a lower end portion of the rail cover on an upper side of a portion protruding from the door tail with respect to the rail cover on the subject side, and the two rail covers are formed such that: when the two door bodies move in the direction in which the door tails of the two door bodies approach each other in the respective guide compartments until the door tails of the two door bodies approach each other, the height of the overlapping portion is seen in the horizontal direction, and a portion of the other rail cover enters the cutout portion.

4. The dock door apparatus of claim 2, wherein the long member is configured to be received within a thickness of the door body.

5. The dock door apparatus according to any one of claims 1 to 4, wherein the long member is formed of a belt member having both ends fixed to the door body, the driving member is formed of a driving pulley provided on a driving shaft of the motor, a pair of idle pulleys are provided on both sides of the driving pulley at the same height as the driving pulley, and the belt member is wound around the driving pulley and passes between the driving pulley and each of the idle pulleys.

6. The dock door apparatus according to any one of claims 1 to 4, wherein the long member is a belt member having both ends fixed to the door body, and the belt member is disposed below a rail cover of the door body on which the belt member is disposed.