Platform door device

Abstract

To provide a platform door device in which a gap is not generated between an abutment member and a counterpart member abutting on the abutment member in a door closed state even if there are some deficiencies in a mounting position and a mounting posture.SOLUTION: A platform door device includes an anti-vibration cushioning material 22 mounted on an end part of a door head side of a door body 4. The platform door device further includes a support member 30 fixed to the door body 4 and supporting the anti-vibration cushioning material 22 in a door head direction or a door tail direction to be rocked and a spring device 40 disposed at a position separated from the support member 30 in the vertical direction of the door body 4 to bias the anti-vibration cushioning material 22 toward the direction separated from the door body 4.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a platform door device. [Background technology]

[0002] A platform door system is a type of automatic door system that is installed on train station platforms. When a train arrives and stops on the track adjacent to the platform, the platform door system opens its doors to allow passengers to board and disembark from the train. Once passengers have finished boarding and disembarking, the platform door system closes the doors and the train departs. The platform door system then keeps its doors closed until the next train arrives and stops on the track adjacent to the platform, preventing passengers on the platform from falling onto the track.

[0003] A platform door device comprises a fixed part that is fixed to the platform, i.e., the installation location, and a door body that is supported on the fixed part so that it can move forward and backward. The fixed part is generally called a door pocket. In many cases, two platform door devices are installed on either side of the boarding and alighting passageway through which passengers board and alight from trains, forming a double-leaf sliding door. In this case, when the two platform door devices are in a closed door state, the door leading ends of the door bodies of the two platform door devices abut against each other. Hereinafter, in this specification, the member that is attached to the door leading end of the door body of the platform door device and abuts against the other door body in a closed door state will be referred to as the abutting member.

[0004] For example, Patent Document 1 discloses that a cushioning member made of soft rubber is fixed via an attachment member to a vertical member arranged at the end of the door panel on the door front side (specification, paragraph 0041, Figure 3). In the platform door device described in Patent Document 1, the cushioning member corresponds to the abutment member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-77969 A Summary of the Invention [Problem to be solved by the invention]

[0006] When two platform door devices are arranged on either side of a boarding / alighting passage to form a double-leaf sliding door, it is necessary to adjust the installation position and installation posture of the platform door devices so that the abutting members abut against each other without any gaps when the doors are closed. This is because if the abutting members do not abut against each other without any gaps, passengers' belongings may be inserted into the gaps. Also, if there is a gap between the abutting members, it will spoil the aesthetic appearance. However, in many cases, the platform floor surface has subtle unevenness or height differences, so there is a problem that it is difficult to adjust the installation position and installation posture of the platform door devices so that no gaps are generated between the abutting members. In addition, there is a problem that after the platform door devices are installed, the platform floor surface is deformed, resulting in a gap between the abutting members.

[0007] Furthermore, since a large number of platform door devices are installed on the platform, it becomes even more difficult to adjust the installation position and posture of the platform door devices so that no gaps occur between the abutting parts in all combinations of adjacent platform door devices.

[0008] The present disclosure provides a platform door device that does not create a gap between a contact member and the opposing member that abuts against the contact member when the door is in a closed state, even if there are some imperfections in the installation position and installation posture of the platform door device. [Means for solving the problem]

[0009] In order to achieve the above object, the platform door device according to the present disclosure includes a fixed part that is fixed to an installation location, a door body that is supported on the fixed part so as to be freely advanced and retreated, and an abutment member that is attached to the end of the door body on the door leading side. Furthermore, the platform door device according to the present disclosure is fixed to the door body and supports the abutment member so as to be swingable in the door leading direction or the door trailing direction. Singular Supporting member and a spring element,The door further includes a biasing means arranged at a position spaced apart from the support member in the vertical direction of the door body, for biasing the abutment member in a direction away from the door body. Effect of the Invention

[0010] According to the present disclosure, the platform door device is provided with a support member that supports the abutment member so that the abutment member can swing in the door leading or trailing direction, and a biasing means that is disposed at a position spaced apart from the support member in the vertical direction of the door body and biases the abutment member in a direction away from the door body. When a part of the abutment member abuts against the other member, the abutment member is pushed by the other member and swings relative to the door body. As a result, the gap between the abutment member and the other member is eliminated. Therefore, even if there is some imperfection in the installation position and installation posture of the platform door device, no gap will be created between the abutment members. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing the configuration of a platform door device according to an embodiment of the present disclosure, and is an outline view of the platform door device as seen from the platform side. [Diagram 2] FIG. 2A is an enlarged view of the end of the door body on the door leading side of the platform door device shown in FIG. 1, and FIG. 2B is a cross-sectional view of the end of the door body on the door leading side taken along the plane indicated by line AA' in FIG. [Diagram 3] FIG. 3 is an explanatory diagram showing the support member shown in FIG. 2 and the surrounding structure; [Figure 4] FIG. 3 is an explanatory diagram showing the spring device shown in FIG. 2 and its surrounding structure. [Diagram 5] FIG. 3 is an explanatory diagram showing the operation of the spring device shown in FIG. 2; [Figure 6] FIG. 1 is an explanatory diagram showing the operation of the platform door device according to an embodiment of the present disclosure when the positioning of two platform door devices is accurately performed, in which (A) shows a state before the doors are closed, and (B) shows a state in which the doors are closed. [Figure 7]FIG. 1 is an explanatory diagram showing the operation of a platform door device according to an embodiment of the present disclosure when two platform door devices are positioned in a relatively open V-shape, in which (A) shows the state before the doors are closed, and (B) shows the state when the doors are closed. [Figure 8] FIG. 1 is an explanatory diagram showing the operation of a platform door device according to an embodiment of the present disclosure when two platform door devices are positioned in a relatively open "inverted V" shape, in which (A) shows the state before the doors are closed, and (B) shows the state when the doors are closed. [Figure 9] An outline diagram showing another example of a platform door device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the configuration and operation of a platform door device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that in each drawing, the same reference numerals are used to denote the same or equivalent parts.

[0013] (Overall composition) FIG. 1 is a configuration diagram showing the configuration of a platform door device 1 according to an embodiment of the present disclosure, and is an external view of the platform door device 1 as seen from the platform side. As shown in FIG. 1, the platform door device 1 includes a fixed part 3 fixed to a platform 2, which is an installation location of the platform door device 1, and two door bodies 4 supported by the fixed part 3 so as to be freely movable forward and backward via a linear rail (not shown) fixed to the fixed part 3. FIG. 1 shows a state in which the door body 4 is pulled out to the outside of the fixed part 3, closing a boarding and alighting passage (not shown). When the door body 4 is pulled into the inside of the fixed part 3, the boarding and alighting passage is opened. Also, as shown in FIG. 1, one of the two door bodies 4 is pulled out to the left side of the fixed part 3, and the other is pulled out to the right side of the fixed part 3.

[0014] The fixed part 3 comprises a lower cross beam 5 fixed to the platform 2, and an upper cross beam 6 arranged parallel to the lower cross beam 5. The upper cross beam 6 is supported by three pillar members 7 erected on the lower cross beam 5. In other words, three pillar members 7 are arranged between the lower cross beam 5 and the upper cross beam 6, and both ends of the pillar members 7 are fixed to the lower cross beam 5 and the upper cross beam 6. A plurality of fixed pipes 8 are arranged between the lower cross beam 5 and the upper cross beam 6. The fixed pipes 8 cross the pillar members 7 and are fixed to them.

[0015] As shown in FIG. 1, the door body 4 includes a lower horizontal member 9 and an upper horizontal member 10 that are arranged at an interval in the vertical direction, and a vertical member 11 that is located on the door end side of the door body 4 and connects the lower horizontal member 9 and the upper horizontal member 10. Between the lower horizontal member 9 and the upper horizontal member 10, horizontal bars 12, the same number as the fixed pipes 8, are arranged parallel to the lower horizontal members 9 and the upper horizontal members 10. The horizontal bars 12 are pipe-shaped members, and the door end side end of the horizontal bars 12 is fixed to the vertical member 11. The door end side end of the horizontal bars 12 is inserted into the fixed pipe 8. A sliding member 13 that abuts against the inner surface of the fixed pipe 8 and slides is attached to the door end side end of the horizontal bars 12. When the platform door device 1 is in a closed door state, that is, when the platform door device 1 is in the state shown in FIG. 1, the horizontal bars 12 are drawn out of the fixed pipe 8. When the platform door device 1 is in an open door state, the horizontal bars 12 are drawn into the fixed pipe 8.

[0016] As shown in Fig. 1, an electric motor 14 and a pinion 15 that is rotationally driven by the electric motor 14 are attached to the fixed part 3. The pinion 15 is meshed with a rack (not shown) that is fixed to the door body 4. Therefore, when the pinion 15 rotates, the door body 4 moves forward and backward relative to the fixed part 3. In this way, the platform door device 1 is equipped with a rack and pinion mechanism, and the door body 4 is driven by the rack and pinion mechanism.

[0017] (Contacting parts) Fig. 2(A) is an enlarged view of the end portion on the door tip side of the door body 4 equipped in the platform door device 1 shown in Fig. 1. As described above, the vertical member 11 is disposed on the door tip side of the door body 4. As shown in Fig. 2, a fixed cushioning material 21 and a swinging cushioning material 22 made of rubber are attached further to the door tip side of the vertical member 11. The fixed cushioning material 21 is fixed to the upper end of the vertical member 11. The swinging cushioning material 22 is a member that swings with respect to the vertical member 11 as described later, and is a vertically long member that is disposed below the fixed cushioning material 21 and extends to the lower end of the vertical member 11.

[0018] The swinging buffer material 22 is an example of an abutment member according to the present disclosure, and is supported by a support member 30 fixed to the vertical member 11 near the upper end. A spring device 40 is disposed near the lower end of the vertical member 11. The spring device 40 is an example of a biasing means according to the present disclosure, and the swinging buffer material 22 is biased so as to move away from the vertical member 11, i.e., from the door body 4, in the door end direction. The specific configurations and functions of the support member 30 and the spring device 40 will be described later.

[0019] Fig. 2(B) is a cross-sectional view of the end of the door body 4 on the door-end side, taken along the plane indicated by line AA' in Fig. 2(A). As shown in Fig. 2(B), the vertical member 11 has a base 11a fixed to the door body 4, and two side plates 11b arranged on the track side and platform side, respectively, and connected to the base 11a at the end on the door-end side. In addition, a partition plate 11c is arranged on the door-end side of the base 11a, and both ends of the partition plate 11c are connected to the two side plates 11b, respectively.

[0020] As shown in FIG. 2(B), the swaying buffer 22 is disposed in a U-shaped region surrounded by two side plates 11b and a partition plate 11c. A gap is provided between the side plate 11b and the swaying buffer 22. This allows the swaying buffer 22 to move forward and backward relative to the vertical member 11, as described below. Note that it is sufficient for the gap between the side plate 11b and the swaying buffer 22 to enable the swaying buffer 22 to move forward and backward relative to the vertical member 11, and to this extent, it is desirable to make the gap as small as possible. Furthermore, making the gap larger than necessary is undesirable as it mars the aesthetic appearance.

[0021] 2(B), a core material 22a is fixed to the oscillation buffer 22. The core material 22a is an aluminum member extending in the longitudinal direction of the oscillation buffer 22. By providing the core material 22a, bending of the oscillation buffer 22 is suppressed.

[0022] As shown in FIG. 2(B), the spring device 40 is disposed between the two side plates 11b. Although not shown in FIG. 2(B), the support member 30 is also disposed between the two side plates 11b. Therefore, the support member 30 and the spring device 40 cannot be seen from the platform side or the track side of the platform door device 1. In this way, the side plates 11b of the vertical member 11 function as a screen member that blocks the support member 30 and the spring device 40 from the line of sight of an observer on the platform side or the track side. Furthermore, the vertical member 11 also blocks a part of the sway buffer material 22 from the line of sight of an observer on the platform side or the track side.

[0023] (Support member) Fig. 3 is an explanatory diagram showing the detailed configuration of the support member 30 and its surroundings. As shown in Fig. 3, the support member 30 includes a nut 31 fixed to the partition plate 11c of the vertical member 11 by crimping, a bolt 32 inserted through the fixed cushioning material 21 and screwed into the nut 31, and a pipe-shaped spacer 33 attached to the bolt 32 to prevent the bolt 32 from being overtightened. The fixed cushioning material 21 is fitted into the vertical member 11 and is fixed to the vertical member 11 by frictional force.

[0024] As shown in Fig. 3, the fixed cushioning material 21 is formed with a recess 21a whose lower end is open. An end of a core material 22a of the oscillating cushioning material 22 is inserted into the recess 21a. A suspension hole 22b is formed in the portion of the core material 22a inserted into the recess 21a. A support member 30 is inserted into the suspension hole 22b. Therefore, the core material 22a is suspended from the support member 30. As described above, the core material 22a is fixed to the oscillating cushioning material 22. Therefore, the oscillating cushioning material 22 is suspended from the support member 30 via the core material 22a.

[0025] As shown in FIG. 3, the width of the recess 21a is larger than the width of the core material 22a. That is, there is a gap in the width direction between the recess 21a and the core material 22a. The inner diameter of the hanging hole 22b is larger than the outer diameter of the support member 30. Therefore, the support member 30 allows the swinging cushioning material 22 to swing in the door head direction or the door tail direction with the support member 30 as a fulcrum. On the other hand, the swinging range of the swinging cushioning material 22 is limited by the width of the recess 21a. In this way, the fixed cushioning material 21 functions as a swinging range limiting means that limits the swinging range of the swinging cushioning material 22 in the door head direction or the door tail direction with the support member 30 as a fulcrum.

[0026] As described above, the width of the recess 21a is larger than the width of the core material 22a, and the inner diameter of the hanging hole 22b is larger than the outer diameter of the support member 30, so that the swinging cushioning material 22 is allowed to move in parallel to the vertical member 11 in the door-end direction or the door-end direction. However, the range of the possible parallel movement is limited by the size of the gap between the recess 21a and the core material 22a. In this way, the fixed cushioning material 21 also functions as a movement range limiting means for limiting the range of the swinging cushioning material 22's parallel movement in the door-end direction or the door-end direction relative to the vertical member 11.

[0027] As described above, the support member 30 supports the swinging cushioning material 22 in a suspended manner. Moreover, the support member 30 allows the swinging cushioning material 22 to swing in the door-end or door-end direction with the support member 30 as a fulcrum. Moreover, the support member 30 allows the swinging cushioning material 22 to move in parallel in the door-end or door-end direction relative to the vertical member 11. The range in which the swinging and parallel movement are possible is limited by the width of the recess 21a of the fixed cushioning material 21.

[0028] (Spring device) FIG. 4 is an explanatory diagram showing the spring device 40 and its surrounding structure. As shown in FIG. 4, the spring device 40 includes a door-end bolt 41, an intermediate nut 42, a door-end bolt 43, and a coil spring 44. The intermediate nut 42 is disposed on the door-end side of the core material 22a. The door-end bolt 41 is inserted into the core material 22a from the door-end side, and is screwed into the intermediate nut 42 on the door-end side of the core material 22a. As configured in this way, the door-end bolt 41 and the intermediate nut 42 are fixed to the core material 22a by fastening the door-end bolt 41 to the intermediate nut 42. A washer 45 is sandwiched between the intermediate nut 42 and the core material 22a. An L-shaped metal fitting 46 that supports the swing cushioning material 22 is sandwiched between the door-end bolt 41 and the door-end bolt 41.

[0029] As shown in Fig. 4, the tail-end bolt 43 is inserted from the tail-end side into an insertion hole 11d drilled in the base 11a of the vertical member 11, and is screwed into the intermediate nut 42 on the tip side of the insertion hole 11d. As a result, the tail-end bolt 43 is fixed to the core material 22a via the intermediate nut 42. In addition, a cylindrical spacer 47 is sandwiched between the tail-end bolt 43 and the intermediate nut 42 to prevent the tail-end bolt 43 from being over-tightened.

[0030] As shown in FIG. 4, the coil spring 44 is stretched between the base 11a of the vertical member 11 and the core 22a of the swing cushioning material 22. The intermediate nut 42 and the tail bolt 43 are inserted through the center of the coil spring 44. In other words, the intermediate nut 42 and the tail bolt 43 are concentrically arranged at the center of the coil spring 44. The coil spring 44 is a compression spring that applies a pressing force to the base 11a and the core 22a. Therefore, the coil spring 44 pushes the swing cushioning material 22 in a direction away from the vertical member 11, that is, toward the door end. In this way, the spring device 40 functions as a biasing means that biases the swing cushioning material 22 in a direction away from the vertical member 11. As shown in FIG. 4, a part of the partition plate 11c of the vertical member 11 is cut open so as not to interfere with the operation of the spring device 40.

[0031] As shown in Fig. 4, the outer diameter of the spacer 47 is smaller than the inner diameter of the insertion hole 11d. Therefore, the spring device 40 advances and retreats relative to the vertical member 11. On the other hand, the outer diameter of the head 43a of the tail bolt 43 is larger than the inner diameter of the insertion hole 11d. Therefore, the head 43a prevents the tail bolt 43 from being pulled out toward the tip side of the base 11a of the vertical member 11, and functions as a movement range limiting means that limits the advancement and retreat of the spring device 40 relative to the vertical member 11. As a result, the amount by which the swing buffer material 22 is pushed by the coil spring 44 and separated from the vertical member 11 is limited.

[0032] Also, as shown in FIG. 5, when the swinging buffer material 22 receives an external force F, the coil spring 44 is compressed, and the spring device 40 and the swinging buffer material 22 move toward the door end. The amount of movement of the spring device 40 and the swinging buffer material 22 toward the door end is limited by the partition plate 11c. That is, when the spring device 40 and the swinging buffer material 22 move toward the door end and the core material 22a abuts against the partition plate 11c, the movement of the spring device 40 and the swinging buffer material 22 is stopped there. In this way, the partition plate 11c also functions as a movement range limiting means that limits the forward and backward movement of the spring device 40 relative to the vertical member 11. The head 43a described above limits the movement of the spring device 40 away from the vertical member 11, and the partition plate 11c limits the movement of the spring device 40 toward the vertical member 11.

[0033] FIG. 4 shows a state in which the head 43a is in contact with the base 11a, and as a result, the displacement of the swing cushioning material 22 toward the door end side is stopped.

[0034] As described above, since the platform door device 1 is equipped with the spring device 40, the swinging buffer material 22 is biased so as to swing in a direction in which its lower end moves toward the door end. The amount by which the lower end of the swinging buffer material 22 moves away from the vertical member 11 is limited by the head 43a.

[0035] (action) Finally, the operation of the platform door device 1 will be explained. When the two platform door devices 1, 1' (not shown) are accurately positioned, the two door bodies 4, 4' are arranged parallel to each other, as shown in Fig. 6(A). In this case, when parts of the swaying buffer materials 22, 22' abut against each other in the closed door state, the swaying buffer materials 22, 22' push against each other and are displaced relative to the vertical members 11, 11'. As a result, as shown in Fig. 6(B), the swaying buffer materials 22, 22' abut against each other without any gaps.

[0036] If there is a positioning defect and the platform door devices 1, 1' are positioned in a relatively open V-shape, the two door bodies 4, 4' will be positioned in a V-shape as shown in Figure 7(A). In this case too, when parts of the swaying buffer materials 22, 22' abut against each other in the closed door state, the swaying buffer materials 22, 22' will push against each other and be displaced relative to the vertical members 11, 11'. As a result, as shown in Figure 7(B), the swaying buffer materials 22, 22' abut against each other without any gaps.

[0037] If there is a positioning defect and the platform door devices 1, 1' are positioned in an "inverted V-shape" open state relative to one another, the two door bodies 4, 4' will be positioned in an "inverted V-shape" open state, as shown in Figure 9(A). In this case too, when parts of the swaying buffer materials 22, 22' abut against each other in the closed door state, the swaying buffer materials 22, 22' will push against each other and be displaced relative to the vertical members 11, 11'. As a result, as shown in Figure 8(B), the swaying buffer materials 22, 22' abut against each other without any gaps.

[0038] In this way, the swaying cushioning materials 22, 22' are displaced relative to the vertical members 11, 11', so that even if there is an imperfection in the positioning of the platform door devices 1, 1', in the closed door state, the swaying cushioning materials 22, 22' abut against each other without any gaps, just as if they were positioned accurately.

[0039] As explained above, even if there is some imperfection in the adjustment of the mounting position and mounting posture of the platform door device 1, no gap will be generated between the swaying buffer material 22 and the swaying buffer material 22' that abuts against the swaying buffer material 22 in the closed door state. Therefore, the door bodies 4, 4' are stably held in the closed door state. In addition, the aesthetic appearance in the closed door state is improved.

[0040] However, the technical scope of the present disclosure is not limited to the above-described embodiment. The present disclosure can be freely applied, modified, or improved within the scope of the technical ideas described in the claims.

[0041] The platform door device 1 to which the present disclosure is applied is not limited to one having the configuration shown in Fig. 1. In other words, the platform door device 1 is not limited to one having a fixed pipe 8 and a cross rail 12 that advances and retreats relative to the fixed pipe 8. The platform door device 1 may also be one having a box-shaped fixed portion 3 and a panel-shaped door body 4, as shown in Fig. 9. In any case, in the platform door device 1, the structure or type of the fixed portion 3 and the door body 4, or the means for driving the door body 4, are not limited.

[0042] In addition, although the platform door device 1 having two door bodies 4 is illustrated in Fig. 1, the platform door device 1 is not limited to having two door bodies 4. The platform door device 1 may also have only one door body 4.

[0043] 6 to 8, an example is shown in which the opposing door body 4' against which the door body 4 abuts is provided with a swing cushioning material 22', but the opposing door body 4' may not be provided with the swing cushioning material 22'.

[0044] 6 to 8 show an example in which the platform door device 1 is combined with the platform door device 1' to form a double-leaf door, but the platform door device 1 may also form a single-leaf door. In other words, for example, the platform door device 1 may be one in which the swing cushioning material 22 abuts against the fixed part 3 of another platform door device 1.

[0045] 2 shows an example in which the support member 30 is disposed above the spring device 40, but in the present disclosure, it is sufficient that the support member and the biasing means are disposed apart from each other in the vertical direction of the door body, and the vertical relationship between them is not limited. In other words, the spring device 40 may be disposed at a position higher than the support member 30.

[0046] The specific configuration of the support member in the present disclosure is not limited to the support member 30 shown in Fig. 3. For example, the support member may be one that supports the swinging buffer material 22 with a hinge. In this case, the translation of the swinging buffer material 22 in the door leading or trailing direction is restrained by the support member. In this case, the spring device 40 may be disposed above the support member, i.e., the hinge.

[0047] The specific configuration of the biasing means in the present disclosure is not limited to the spring device 40 illustrated in FIG. 4. In particular, the spring element of the biasing means is not limited to the coil spring 44. The spring element may be a leaf spring or other solid spring. The spring element may be other types of spring. An elastic body such as rubber may be used as the spring element.

[0048] In any event, the technical scope of the present disclosure is not limited to the specific configurations shown in the specification and drawings. [Explanation of symbols]

[0049] 1,1' platform door device, 2 platform, 3 fixed part, 4,4' door body, 5 lower cross beam, 6 upper cross beam, 7 pillar member, 8 fixed pipe, 9 lower cross member, 10 upper cross member, 11,11' vertical member, 11a base, 11b side plate, 11c partition plate, 11d insertion hole, 12 cross bar, 13 sliding member, 14 electric motor, 15 pinion, 21 fixed cushioning material, 21a recess, 22,22' swing cushioning material, 22a core material, 22b suspension hole, 30 support member, 31 nut, 32 bolt, 33 spacer, 40 spring device, 41 door front bolt, 42 intermediate nut, 43 door rear bolt, 43a head, 44 coil spring, 45 washer, 46 L-shaped bracket, 47 spacer, F external force.

Claims

1. A fixing part that is fixed to an installation location; A door body supported on the fixed portion so as to be movable forward and backward; A platform door device comprising: an abutment member attached to an end portion of the door body on the door tip side, A single support member that is fixed to the door body and supports the abutment member so that the abutment member can swing in a door leading direction or a door trailing direction; and a biasing means having a spring element, disposed at a position spaced apart from the support member in the vertical direction of the door body, and biasing the abutment member in a direction away from the door body. Platform door device.

2. A swing range limiting means is provided which is fixed to the door body and limits the range in which the abutment member swings in the door leading or trailing direction with the support member as a fulcrum. A platform door device as described in claim 1.

3. The support member allows the abutment member to move parallel to the door leading end direction or the door trailing end direction, A movement range limiting means is provided which is fixed to the door body and limits the range of translation of the abutment member relative to the support member in the door leading direction or the door trailing direction. A platform door device as described in claim 1 or claim 2.

4. A movement range limiting means is provided for limiting the movement range of the biasing means to limit the range in which the abutting member advances and retreats relative to the door body. A platform door device as described in any one of claims 1 to 3.

5. A pair of side plates are disposed on the platform side and track side of the abutment member with a gap therebetween and are fixed to the end of the door body on the door-front side, and the pair of side plates block at least a part of the abutment member from the line of sight of an observer on the platform side and track side. A platform door device as described in any one of claims 1 to 3.

6. a screen member fixed to the end of the door body on the door tip side to block the support member and the biasing means from the line of sight of an observer on the platform side or the track side; A platform door device as described in any one of claims 1 to 3.

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