JP2000108890A - Opening/closing fence for platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operational reliability of the door driving mechanism of a 2-stage drawing type opening/closing fence for platform. SOLUTION: In an opening/closing fence having back and front doors 2 and 3 entering a door guard 1, the back door 2 is driven by a linear motor 22 in the door guard 1, the motion of the back door 2 with the door guard 1 is converted into the rotational motion of a gear shaft 18 by engagement between a rack 12 and a flat gear, this rotational motion is changed for direction by bevel gears 15 and 16 and transmitted to a ball screw 12, a slide bearing 11 engaged with the ball screw 12 is moved, and then the front door 3 supported on the slide bearing 11 is driven. Since the back door 2 is driven by the linear motor 22 and the front door 3 is moved in linkage with the back door 2, a driving mechanism is simplified and operational reliability is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an openable / closable safety fence provided on a railway platform to prevent passengers from falling on a track or coming into contact with a train (hereinafter referred to as an openable fence). About.

[0002]

2. Description of the Related Art The above-mentioned opening / closing fence is closed when a train is waiting, and when a train arrives at a platform, a door is opened to allow passage of passengers, and a screen-shaped door pocket generally installed on the platform; And a sliding door that is housed in the door pocket so as to be freely accessible. There are two types of fences, one with a single door that enters and exits the door pocket, and the other with a combination of two doors on the door pocket side (rear door) and the front (front door) (two-stage type). Is required to be smaller, a two-stage system is used.

[0003]

In the above two-stage open / close fence, a rail is laid on the platform floor over the entire area of the door open / close stroke as a method of supporting the door, and the door is supported by the rail. (Hereinafter, referred to as a rail support system) have been more widely used than before. This rail support system uses a groove formed on the platform floor for laying rails, and accommodates transmission members such as feed screws and wire ropes for driving the front door, and drives motors provided on the door pocket, etc. The front door is moved via the transmission member by the source, and the rear door is moved following the front door by engaging a pin provided on one of the front and rear doors with a groove provided on the other. Therefore, there is an advantage that the configuration of the drive mechanism of the door becomes easy.

[0004] However, the rail support system has a problem in safety when walking because grooves and protrusions are formed on the floor surface with the laying of the rails. There is a problem that the installation work of the is troublesome.
Therefore, even in a two-stage opening / closing fence, two doors are cantilevered only with a door pocket, and these doors are put in and out while being floated from the platform floor (hereinafter referred to as a door pocket supporting system). ) Is desired. According to such a method, the above-mentioned problem associated with the installation of the rail does not occur.

However, on the other hand, the door pocket support method has a problem that the structure of the door driving mechanism is troublesome as described below. That is, to move the front and rear two doors into and out of the door pocket, the front door is driven by the drive source as described above, and when pulling out the door, first slide only the front door in the groove while sliding the pin in the groove. The front door is pulled forward by a predetermined distance, then the pin is engaged with the groove at its end, and the rear door is pulled out by the front door.When the door is pulled in, similarly, only the front door is retreated by a predetermined distance, and then the front door is moved by the front door. It is reasonable to push the door in, but the front door is completely removed from the door pocket at the end of the drawer, so if you try to drive the front door with the drive source provided in the door pocket, if the transmission member between them is long, I have no choice.

In this case, in the rail support system, as described above, the transmission member such as a feed screw can be appropriately supported on the platform floor surface. However, such a structure cannot be adopted in the door pocket support system. When the front door is pulled out, the door bag is overhanged, and the transmission member needs to be stored in the door bag as the front door is pulled in. Such a drive mechanism tends to have insufficient rigidity, has a complicated structure, and has poor operation reliability. SUMMARY OF THE INVENTION It is an object of the present invention to provide a door pocket-supporting platform opening / closing fence having a highly reliable door driving mechanism.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a screen-shaped door pocket installed on a railway platform and a sliding door type door which is housed in the door pocket so as to be freely accessible. In a platform opening / closing fence, a two-stage door including a rear door slidably supported by the door pocket and a front door slidably supported by the rear door is installed in the door pocket. Drive the rear door with the drive source that has been moved in and out,
The front door is moved in and out in conjunction with the rear door moving in and out (claim 1).

That is, in the present invention, the rear door is driven by a drive source in the door pocket, and the front door is driven by the rear door instead of the conventional structure in which the front door is driven and the rear door follows the front door. To be linked to The rear part of the rear door remains in the door pocket even when the door has been pulled out, so if this part is driven by a drive source, a long transmission member is not required, and this transmission member is always in the door pocket. Can be stored.

According to the first aspect of the present invention, a slide rail with a feed screw is fixed to the rear door which is slidably supported via a slide bearing on a slide rail fixed to the door pocket via a slide bearing. A gear mechanism is provided for fixing a slide bearing that meshes with the feed screw and slidably contacts the slide rail to the front door, and that converts the movement of the rear door into and out of rotation with the door pocket, Preferably, the feed screw is rotated by a gear mechanism to move the front door in and out (claim 2).

In the opening / closing fence according to claim 2, the gear mechanism fixes a rack to the door pocket, attaches a spur gear meshing with the rack to one end, and feeds a bevel gear attached to a bevel gear to the other end. The rear door is provided rotatably perpendicular to the screw, and a bevel gear meshing with the bevel gear is attached to the shaft end of the feed screw, and the rotation of the gear shaft accompanying the in / out operation of the rear door causes the bevel gear to rotate. It is preferable that the front screw be moved in and out by rotating a feed screw. In this case, the rear door is preferably driven by a linear motor (claim 4).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a front view of a state in which a door of an opening / closing fence is drawn out by cutting a side wall of a door pocket, FIG. 2 is a cross-sectional view along a line II-II in FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along the line IV-IV. In these figures, the opening / closing fence comprises a screen-shaped door pocket 1 and two sliding door-type doors 2 (rear door) and 3 (front door) which are housed in the door pocket 1 so as to be freely accessible. Are fixed to the floor of the platform 4 by bolts (not shown). Rear door 2 and front door 3
When the door is opened, it is drawn into the flat-walled hollow door pocket 1, and when the door is closed, it is pushed out from the opening 5 at the right end in FIGS. 1 and 2 as shown. Here, the rear door 2 is slidably supported by the door pocket 1, the front door 3 is slidably supported by the rear door 2, and the rear door 2 is driven by a drive source installed in the door pocket to enter and exit. The front door 3 moves in and out in conjunction with the movement of the rear door 2 in and out, and the mechanism will be described below.

First, a slide rail 6 for guiding and supporting the rear door 2 is fixed to the upper part of the inner wall surface of one side wall of the door pocket 1. The bearing 7 is fixed. Slide bearing 7
Is fitted to the slide rail 6 as shown in FIG. 4 and slides thereon while the rear door 2 is suspended. Although not shown, the slide bearing 7 is in rolling contact with the slide rail 6 via a large number of balls performing an infinite circulation motion.
Both the slide rail 6 and the slide bearing 7 are known. The rear door 2, which is suspended and supported by the slide rail 6 by the slide bearing 7, is slidably fitted into a U-shaped guide rail 9 in which a pair of front and rear rotating wheels 8 fixed to the bottom is fixed to the lower part of the door pocket 1. It is stabilized in the left and right direction.

On the other hand, a slide rail 10 with a ball screw is fixed to the rear door 2 slightly below the slide bearing 7 in the direction of entry and exit of the front door 3. A pair of front and rear slide bearings 11 are fixed. The slide rail 10 has a ball screw 12 as a feed screw parallel to the front surface thereof.
Are rotatably supported by bearings at both ends of the slide rail 10. The slide bearing 11 with a built-in female thread is
The screw is engaged with the ball screw 12 via the female screw portion, is fitted to the slide rail 10, and slides while suspending the front door 3 on the slide rail 10 by rotating the ball screw 12. The slide bearing 11 also has a number of balls that circulate infinitely, and makes rolling contact with the ball screw 12 and the slide rail 10 via the balls. Including the slide rail 10 with ball screw,
These are all known. The front door 3 suspended and supported by the slide rail 10 by the slide bearing 11 has a pair of front and rear rotating wheels 13 (see FIG. 4) fixed to the lower side surface via L-shaped brackets and fixed to the lower inside of the rear door 2. The guide rail 14 having the inverted U-shaped cross section is slidably fitted to the guide rail 14 so as to be prevented from swinging in the left-right direction.

Next, a bevel gear 15 is attached to a shaft end on the rear side of the ball screw 12, and a bevel gear 1 is attached to one end.
A bevel gear 16 meshing with the gear 5 is mounted, and a gear shaft 18 having a spur gear 17 mounted on the other end is provided so as to be orthogonal to the ball screw 12, and the gear shaft 18 is supported by a support arm 19 fixed to the rear door 2. Are supported via rolling bearings 20 (FIG. 3). The spur gear 17 is close to the inner wall surface of the side wall opposite to the side wall of the door pocket 2 to which the slide rail 6 is attached, and a rack 21 having a length corresponding to the opening / closing stroke of the rear door 2 is fixed to the inner wall surface. , The spur gear 17 meshes with the rack 21. Meanwhile, door pocket 1
A linear motor 22 as a drive source for driving the door pocket 2 is provided at an upper portion of the door. The linear motor 22 includes a stator 23 on the door pocket 1 side and a movable element 24 on the rear door 2 side. The stator 23 is disposed in the door pocket 1 over a length corresponding to the opening / closing stroke of the rear door 2. I have. In addition, mover 2
Numeral 4 is fixed to the rear door 2 via a connection fitting 25 and faces the stator 23 via a gap.

The opening / closing operation of the above-mentioned opening / closing fence is as follows. When the linear motor 22 is started from the closed state in FIG. 1 and the rear door 2 is driven leftward, the rear door 2 slides on the slide rail 6 via the slide bearing 7 and is drawn into the door pocket 1. At the same time, the spur gear 17 moving integrally with the rear door 2 rotates by meshing with the rack 21 fixed to the door pocket 1, and the coaxial bevel gear 16 also rotates integrally. Thereby, the bevel gear 15 meshing with the bevel gear 16 rotates, and the ball screw 12 also rotates. As a result, the slide bearing 11 screwed with the ball screw 12 is sent to the left,
The front door 3 supported thereby is pulled into the door pocket 1 together with the rear door 2. Needless to say, the helical direction of the ball screw 12 is set so that the rear door 2 and the front door 3 move in the same direction. When the rear door 2 reaches the position indicated by the two-dot chain line in FIG. 1, the movement is completed and stops, and at the same time, the front door 3 overlaps the rear door 2 and stops at the same position. If the linear motor 22 is driven in the reverse direction from this position, the rear door 2
The front door 3 is pulled out to the closed state in FIG. 1 by the same operation.

In the illustrated embodiment, the rear door 2 is driven by a linear motor 22 in the door pocket 1, and the front door 3 is driven by the gear mechanisms 15 to 18, the ball screw 12
Interlock via such as. In this case, the rear portion of the rear door 2 driven by the linear motor 22 remains in the door pocket even when the drawer is completed, as shown in FIG. 1, so that a long transmission member for driving this portion is unnecessary. . Temporarily, door pocket 1
When the front door 3 is driven by the driving source inside the door, the front door 3 is detached from the door pocket 1 at the time of completion of the drawer shown in FIG. 1, so that the transmission member for transmitting the driving force of the driving source to the front door 3 is long. And it becomes difficult to secure its rigidity.
Since this transmission member needs to be stored in the door pocket 1 as the front door 3 is pulled in, the structure becomes complicated.

Further, the front door 3 is driven, and when the front door 3 moves a predetermined distance, the rear door 2 is pulled (when the door is closed) or pushed (when the door is opened) to move the rear door 2. While the opening and closing operations are sequential, in the illustrated embodiment, when the rear door 2 starts moving, the front door 3
Also starts moving immediately in response to this, the rear door 2 and the front door 3 open and close simultaneously and in parallel. Therefore, according to the illustrated embodiment, the opening and closing operation of the door is quicker than that of the above-described sequential operation. The drive source for the rear door 2 is not limited to the linear motor 22, but a rotary motor can of course be used. However, since the rear door 2 performs linear motion, the use of the linear motor 22 eliminates the need for a mechanism for converting rotary motion into linear motion as in the case of using a rotary motor. It's easy.

[0018]

As described above, according to the present invention, the rear door is driven by the drive source in the door pocket, and the front door is interlocked with the rear door. With high rigidity, it is possible to improve the operational reliability and the opening / closing speed of the two-stage opening / closing fence.

[Brief description of the drawings]

FIG. 1 is a front view of a platform opening / closing fence according to an embodiment of the present invention in a door closed state.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door pocket 2 Rear door 3 Front door 4 Platform 6 Slide rail 7 Slide bearing 8 Rotating wheel 9 Guide rail 10 Slide rail 11 Slide bearing 12 Ball screw 13 Rotating wheel 14 Guide rail 15 Bevel gear 16 Bevel gear 17 Spur gear 21 Rack 22 Linear Motor 23 Stator 24 Mover 25 Connection bracket

Claims (4)

[Claims] 1. A platform opening / closing fence comprising a screen-shaped door pocket installed on a railway platform and a sliding door type door which is housed in the door pocket so as to be freely accessible, wherein the door is slidably supported by the door pocket. A two-stage door including a rear door that has been moved and a front door that is slidably supported by the rear door, and the rear door is driven by a drive source installed in the door pocket to move in and out. An opening / closing fence for a platform, wherein the front door is moved in and out in conjunction with the movement of a rear door. 2. A slide rail with a feed screw is fixed to the rear door, which is slidably supported on a slide rail fixed to the door pocket via a slide bearing, along a direction in which the front door enters and exits. The front door is fixed with a slide bearing that is screwed with the feed screw and slidably contacts with the slide rail, and a gear mechanism that converts an in / out operation of the rear door into a rotational movement with the door pocket is provided. The open / close fence for a platform according to claim 1, wherein the feed screw is rotated by a gear mechanism to move the front door in and out. 3. The rack is fixed to the door pocket, and a spur gear meshing with the rack is attached to one end, and a bevel gear attached to the other end is rotatable with respect to the rear door so as to be orthogonal to the feed screw. A bevel gear meshing with the bevel gear is attached to the shaft end of the feed screw, and the feed screw is rotated by the rotation of the gear shaft accompanying the in / out operation of the rear door to move the front door in and out. The opening / closing fence for a platform according to claim 2, wherein 4. An open / close fence for a platform according to claim 3, wherein said rear door is driven by a linear motor.