Intrusion prevention device

Abstract

To provide an intrusion prevention device that can effectively prevent entry into a restricted area with gaps while ensuring the safety of the target object. [Solution] The intrusion prevention device 81 is an intrusion prevention device 81 that includes a plate-shaped restricting member 84 that prevents passage in a first direction D1, and the restricting member 84 includes a plurality of element members arranged in the width direction D3 along the plate surface intersecting the first direction D1 and connected at a boundary portion 84i, and the plurality of element members bend at the boundary portion 84i by a predetermined external force. Since the plurality of element members bend at the boundary portion 84i by a predetermined external force, even if they bend up to an allowable limit they maintain a substantially normal shape and prevent the entry of people or objects, and if the allowable limit is exceeded they bend at the boundary portion 84i and prevent injury to people or damage to objects.

Description

Technical Field

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[0001] The present invention relates to an intrusion prevention device for preventing a person from entering a prohibited area, for example, an intrusion prevention device attached to the track side of a home fence.

Background Art

[0002] In order to prevent a vehicle from deviating beyond the roadside or the median strip of a road, there is known a protective fence composed of an upper body and a lower body, with the side walls of both bodies serving as the oncoming vehicle wall surface, wherein the upper body made of an elastic body is fixed or fastened in a strip shape over the lower body in the vehicle traveling direction as a cushioning material forming a buffer body (Patent Document 1).

[0003] The above protective fence is not premised on the use of preventing a person or an object from entering a gap-shaped prohibited area, and there is a possibility that problems may occur if it is used as it is for such a purpose. Specifically, if the strength of the upper body is high, there is a possibility of injuring a person involved in a collision or damaging an object, and if the strength of the upper body is low, a person or an object may enter the prohibited area.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] The present invention has been made in view of the above points, and an object thereof is to provide an intrusion prevention device that can effectively prevent intrusion into a gap-shaped prohibited area while ensuring the safety of an object.

[0006] To achieve the above objective, the intrusion prevention device according to the present invention is an intrusion prevention device comprising a plate-shaped restricting member that obstructs passage in a first direction, wherein the restricting member includes a plurality of element members arranged in the width direction along a plate surface intersecting the first direction and connected at the boundary, and the plurality of element members bend at the boundary by a predetermined external force.

[0007] According to the above intrusion prevention device, multiple element members bend at the boundary due to a predetermined external force. Therefore, even if they bend up to the permissible limit, they maintain a roughly normal shape to prevent people and objects from entering, and if the permissible limit is exceeded, they bend at the boundary to prevent injury to people or damage to objects. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram illustrating a platform fence equipped with an intrusion prevention device according to the first embodiment. [Figure 2] (A) is a plan view showing the installation state of the intrusion prevention device, and (B) is a side view showing the intrusion prevention device. [Figure 3] (A) is a side view of the back of the intrusion prevention device, (B) is a top view of the intrusion prevention device, and (C) is a side view of the front of the intrusion prevention device. [Figure 4] This is a conceptual diagram explaining the operation of an intrusion prevention device. [Figure 5] Figures (A) through (C) are conceptual diagrams illustrating the method for adjusting the width of the limiting member. [Figure 6] This is a diagram illustrating a platform fence equipped with an intrusion prevention device according to the second embodiment. [Figure 7] (A) to (C) are diagrams illustrating intrusion prevention devices. [Figure 8] This is a side view illustrating a modified intrusion prevention device. [Modes for carrying out the invention]

[0009] [First Embodiment] To describe the intrusion prevention device according to the first embodiment, we will first describe the platform fence to which the intrusion prevention device is installed, and then we will describe in detail the structure of the intrusion prevention device, etc.

[0010] Figure 1 is a conceptual diagram illustrating the platform screen door 100. Figure 1 shows the platform screen door 100 as viewed from the platform PF side or the platform side. In this specification, the platform PF side of the platform screen door 100 is considered the front side of the platform screen door 100. The track RL side of the platform screen door 100 is considered the back side of the platform screen door 100.

[0011] The platform screen door 100 separates the station platform PF from the track RL. The platform screen door 100 is also called a movable platform screen door. The platform screen door 100 is composed of a predetermined number of platform screen door elements 10 arranged in a row to cover a predetermined area of ​​the platform PF. Each platform screen door element 10 has a door body 20 and a platform screen door body 30. In the example in Figure 1, in each platform screen door element 10, a pair of door bodies 20 are extended from the end openings 35a, 36a of the platform screen door body 30, and the door bodies 20 are in a state where they close the boarding and alighting passage, thereby forming a fence-like device that extends along the edge of the platform PF and opens and closes at the appropriate location.

[0012] The door body 20 is a door component and is installed to be able to extend and retract from the platform fence body 30. The door body 20 has a main door body 21 that moves laterally from a first end 32, which is one end of the platform fence body 30, and a secondary door body 22 that moves laterally from a second end 33, which is the other end of the platform fence body 30. Normally, the operation of the main door body 21 and the secondary door body 22 is controlled to open and close in conjunction with each other.

[0013] Each platform screen door body 30 is fixed to the platform PF floor via a pair of seat members 38 and has a door pocket structure that holds the door body 20 so that it can move forward and backward. The platform screen door body 30 houses a control device 40, and between the platform screen door body 30 and the door body 20, a guide mechanism 50 and a drive mechanism 60 are provided as internal mechanisms. The control device 40 includes a computer and is housed in a top plate member 31d provided at the upper end of the platform screen door body 30. The control device 40 is connected via a communication line CC to an integrated control device 107 separately provided on or near the platform PF. The control device 40 receives opening and closing signals from the integrated control device 107 and controls the operation of the platform screen door elements 10. The guide mechanism 50 includes rails, sliding members, etc., and enables the sliding of the door body 20 in the ±X direction relative to the platform screen door body 30. In other words, the ±X direction corresponds to the opening and closing direction D0 of the door body 20. The drive mechanism 60 includes a motor, timing belt, pulleys, etc., and can cause the door body 20 to open and close in the ±X direction.

[0014] On the back side of the platform screen door body 30, a pair of upper and lower intrusion prevention devices 81 and 82 are fixed adjacent to the first end 32, and a pair of upper and lower intrusion prevention devices 81 and 82 are fixed adjacent to the second end 33. The intrusion prevention devices 81 and 82 are attached to the cover member 71 so as to protrude from the cover member 71 toward the track RL side.

[0015] In Figure 1, the platform fence element 10 on the right is called the first platform fence element 10A, and the platform fence element 10 on the left is called the second platform fence element 10B. The first platform fence element 10A has a first platform fence body 30A and a first door body 20A that moves back and forth from the end of the first platform fence body 30A (the first end 32 on the left in the figure) toward the side where the second platform fence element 10B is located. The second platform fence element 10B has a second platform fence body 30B and a second door body 20B that moves back and forth from the end of the second platform fence body 30B (the second end 33 on the right in the figure) toward the side where the first platform fence element 10A is located. Both the first platform fence body 30A and the second platform fence body 30B are platform fence bodies 30 and are arranged adjacent to each other. The first gate body 20A is called the main gate body 21 of the first platform fence body 30A, and the second gate body 20B is called the secondary gate body 22 of the second platform fence body 30B.

[0016] When considering opening and closing, the first door body 20A and the second door body 20B can work together to function like a sliding door that opens and closes synchronously. In Figure 1, the first door body 20A and the second door body 20B, which are in contact with each other and in a closed state, are separated from each other and in an open state and are housed in the housing 31 of the platform fence body 30. Although not shown in the illustration, in this embodiment, the first door body 20A and the second door body 20B, which are housed in the same platform fence body 30, can be arranged in parallel in the ±Y direction perpendicular to the ±X direction, which is the direction of movement, within the housing 31. Therefore, in the open state, the first door body 20A and the second door body 20B are in an overlapping state within the same housing 31.

[0017] The relationship between the first platform fence element 10A and the second platform fence element 10B described above holds true between any pair of adjacent platform fence elements 10.

[0018] The area opened and closed by the main door body 21 of the first home fence body 30A and the sub-door body 22 of the second home fence body 30B is called a passage area AR1, and the area between a pair of adjacent passage areas AR1 is called a prohibited area AR2. The passage area AR1 forms a passenger boarding and alighting passage. The intrusion preventers 81 and 82 prevent a person from entering the prohibited area AR2 from the passage area AR1. That is, the intrusion preventers 81 and 82 prevent a person from entering the prohibited area AR2, which is the gap GA between the cover member 71 of the home fence body 30 and a train not shown. By arranging the pair of intrusion preventers 81 and 82 vertically, the effect of preventing a child of low height or the like from entering the prohibited area AR2 is enhanced. Note that, not limited to the pair of intrusion preventers 81 and 82, three or more intrusion preventers can be arranged side by side in the vertical direction.

[0019] FIG. 2(A) is a plan view showing the attachment state of the intrusion preventers 81 and 82 on the side of the first door body 20A in the first home fence element 10A, and FIG. 2(B) is a side end view showing the intrusion preventers 81 and 82. The intrusion preventers 81 and 82 include a restricting member 84 and a fixing member 85.

[0020] The restricting member 84 is a plate-like member extending parallel to the YZ plane, and prevents people and objects from passing in the first direction D1 toward the prohibited area AR2. The restricting member 84 bends at a plurality of locations so as to bend as a whole in the first direction D1 by a predetermined external force in the first direction D1. The restricting member 84 is more likely to bend by an external force in the second direction D2 opposite to the first direction D1 than by an external force in the first direction D1. Here, when considering the first end portion 32 side as shown in the figure, the first direction D1 is the -X direction. Note that when considering the second end portion 33 side not shown, the first direction D1 is the +X direction. The fixing member 85 is provided for fixing one end in the width direction D3 of the restricting member 84 to the track RL side of the home fence body 30. The fixing member 85 is attached to the cover member 71 of the home fence body 30 by a fastener, an adhesive, welding, or the like, and supports the intrusion preventers 81 and 82 so as to extend perpendicularly to the cover member 71. The base portion of the restricting member 84 is detachably fixed to the fixing member 85 by a fastener not shown.

[0021] FIG. 3(A) is a side view of the back side of the intrusion prevention device 81, FIG. 3(B) is a plan view of the intrusion prevention device 81, and FIG. 3(C) is a side view of the front side of the intrusion prevention device 81.

[0022] In the intrusion prevention device 81, the fixing member 85 is, for example, made of metal and is a box-shaped bracket member cut obliquely. The fixing member 85 has a plate-shaped first member 85a and a plate-shaped second member 85b extending in a direction orthogonal to the first member 85a. The first member 85a extends parallel to the cover member 71 of the home fence body 30 shown in FIG. 2(A) etc. and is fixed to the cover member 71. The second member 85b supports the restricting member 84 perpendicular to the cover member 71 and supports the restricting member 84 so that the restricting member 84 extends parallel to the YZ plane.

[0023] The restricting member 84 has a size with a horizontal width d1 of about 20 cm to 30 cm, but is appropriately set according to the width in the front-rear direction or the Y direction of the prohibited area AR2 shown in FIG. 2(A) etc. The restricting member 84 has a size with a vertical width d2 of about 5 cm to 20 cm. The thickness d4 of the restricting member 84 is about 2 mm to 6 mm.

[0024] The restricting member 84 has a plate-shaped base material 87 directly fixed to the fixing member 85 and a thin plate-shaped reinforcing member 88 attached to the surface of the base material 87 on the -X direction side, that is, the second direction D2 side. The base material 87 is formed of a resin material, and the reinforcing member 88 is formed of a resin material or the like.

[0025] The limiting member 84 includes a plurality of element members 84a arranged in the width direction D3 along the plate surface intersecting the first direction D1 or the -X direction. The width d03 of the element member PR closest to the root is larger than the width d3 of the other element members 84a. The width d3 of the element members 84a closer to the tip than element member PR is set to, for example, 3 cm to 7 cm, but is not limited to this. The plurality of element members 84a are connected by a boundary portion 84i, and can be cut at the boundary portion 84i using a cutting tool. This makes it possible to adjust the length in the width direction D3 in steps. The number of element members 84a constituting the limiting member 84 is not limited to 5 as shown in the figure, but can be appropriately set in a range of, for example, 3 to 10, depending on the range and degree of adjustment of the size.

[0026] The boundary portion 84i of the limiting member 84 is a thin-walled portion that extends linearly in the vertical Z direction. A V-groove GV is formed on the -X side, or first direction D1 side, of the boundary portion 84i. The slope of this V-groove GV is relatively large on the root side, i.e., the +Y side, and relatively small on the tip side, i.e., the -Y side. In the illustrated example, the slope on the root side of the V-groove GV is 90°, but the present invention is not limited to this. The depth of the V-groove GV is, for example, about 1 mm to 3 mm, and the thickness of the boundary portion 84i is about 1 mm to 3 mm, but these depths and thicknesses are appropriately adjusted according to the size of the limiting member 84, etc.

[0027] Multiple bundles of core wires 89 are embedded in the reinforcing member 88 of the limiting member 84. The bundles of core wires 89 extend from near the base end of the limiting member 84 to near the tip end of the limiting member 84, and are embedded so as to cross the thin boundary portion 84i. The core wires 89 suppress the limiting member 84 from breaking at the boundary portion 84i. In other words, if the external force applied to the limiting member 84 in the first direction D1 is greater than expected, the limiting member 84 may bend significantly at the boundary portion 84i. However, by embedding the core wires 89, it is possible to reliably prevent the element member 84a on the tip side of the bent boundary portion 84i from separating during such bending, thereby preventing the element member 84a from unintentionally falling off. The core wires 89 are thin metal wires, such as steel wire, but they can be replaced with resin materials or composite materials with increased toughness.

[0028] If the material forming the limiting member 84 has high toughness, the reinforcing member 88 can be omitted. If the reinforcing member 88 is omitted, the core wire 89 can be embedded in the base material 87.

[0029] The element member PR at the base of the limiting member 84 has multiple holes 84h formed therein, allowing the limiting member 84 to be screwed to the fixing member 85 using screws (not shown). The limiting member 84 is replaceable with either the fixing member 85 or the platform fence body 30.

[0030] Figure 4 is a conceptual diagram illustrating the operation or function of the intrusion prevention device 81. In this case, an external force F1 directed toward the first direction D1 is applied to the tip of the limiting member 84. As a result, the limiting member 84 bends slightly at each boundary portion 84i and generally curves gently toward the first direction D1, but does not break down to the point of sharp bending or complete breakage at specific points. The reason for this is that even if the V-groove GV (see Figure 3(B)) is compressed and crushed at the boundary portion 84i of the limiting member 84, the limiting member 84 itself is relatively easy to bend but not easily compressed and deformed, and as long as the bottom of the V-groove GV and the reinforcing member 88 do not break, the bending angle at the boundary portion 84i will be limited to approximately the opening angle of the V-groove GV, thus preventing damage to the limiting member 84. Here, the external force F1 is assumed to be the load when an adult of average build leans against the intrusion prevention device 81, and the limiting member 84 is formed with a strength such that it does not bend significantly at a specific point even when the force is, for example, 147N or more. The above is an example, and if the condition is that the intrusion prevention device 81 will not be damaged even if an adult of average build falls heavily onto it, the strength of the limiting member 84 will be adjusted so that it does not bend significantly at a specific point even when the force is, for example, 245N or more. Note that if the external force F1 is greater than assumed, the limiting member 84 will bend significantly at the boundary 84i. As a result, even if the intrusion prevention device 81 is damaged, it is possible to avoid and prevent injuries to people trying to move into the restricted area AR2 or damage to property. It is also possible to prevent damage to objects that protrude from the train.

[0031] Figures 5(A) to 5(C) are conceptual diagrams illustrating a method for adjusting the horizontal width of the limiting member 84. Figure 5(A) shows the original state, in which the limiting member 84 includes five element members 84a on the tip side of the element member PR. Figure 5(B) illustrates the case where the four element members 84a, excluding the tip element member 84a, are supported from the +X side, while an external force F2 is applied to the tip element member 84a in the second direction D2. In this case, the tip element member 84a is bent at the boundary 84i with the adjacent element member 84a, but remains connected to the adjacent element member 84a via the reinforcing member 88. In other words, at the boundary 84i of the limiting member 84, the base material 87 at the bottom of the V groove GV is fractured, but the reinforcing member 88 is not fractured, and the tip element member 84a remains connected to the adjacent element member 84a. In this state, if the reinforcing member 88 is cut using, for example, a scissors-like or cutter knife-like cutting tool 91, the tip element member 84a can be separated from the adjacent element member 84a. In other words, the limiting member 84 can be cut at the boundary portion 84i, and the element member 84a on the tip side of the boundary portion 84i can be separated. Figure 5(C) shows the state after the tip element member 84a shown in Figure 5(B) has been removed, and corresponds to Figure 3(B). In this way, the external force F2 directed in the second direction D2 can be considerably smaller than the external force F1 directed in the first direction D1 explained in Figure 4, and the tip element member 84a can be bent by hand or with simple tools. In other words, at the platform site, it becomes possible to easily adjust the dimensions by reducing the width d2 of the limiting member 84 (see Figure 3(C)) in units of element members 84a, thereby improving the workability of adjusting the width of the limiting member 84. By providing a reinforcing member 88 that suppresses separation, it is possible to prevent the broken element member 84a from scattering and flying into the surroundings, and also to prevent secondary damage caused by fragments.

[0032] In the example shown in Figure 5(B), the case where the tip element member 84a is separated by bending the boundary portion 84i between the tip element member 84a and the second element member 84a from the tip in the opposite direction has been described. However, the element members 84a on the root side, from the second to the tip, may also be separated. In other words, the intrusion prevention device 81 can be separated at any of the multiple boundary portions 84i, allowing for length adjustment with a high degree of freedom.

[0033] The above describes the intrusion prevention device 81 located on the upper side, but the intrusion prevention device 82 located on the lower side has a similar structure to the intrusion prevention device 81.

[0034] The above describes the intrusion prevention devices 81 and 82 provided on the first door body 20A side of the first platform fence element 10A. However, the intrusion prevention devices 81 and 82 provided on the second door body 20B side of the first platform fence element 10A have a similar structure to those shown in Figure 2(A), etc., and while they are curved as a whole, they prevent people and objects from passing in the first direction D1 toward the prohibited area AR2. Furthermore, the intrusion prevention devices 81 and 82 provided on the second door body 20B side of the first platform fence element 10A have a width d1 in the Y direction or horizontal direction that can be adjusted by the limiting member 84.

[0035] The intrusion prevention devices 81 and 82 of the first embodiment described above are intrusion prevention devices 81 and 82 that include a plate-shaped restricting member 84 that prevents passage in the first direction D1, wherein the restricting member 84 includes a plurality of element members 84a arranged in the width direction D3 along the plate surface intersecting the first direction D1 and connected at a boundary portion 84i, and the plurality of element members 84a bend at the boundary portion 84i by a predetermined external force.

[0036] According to the above-mentioned intrusion prevention devices 81 and 82, since multiple element members 84a bend at the boundary portion 84i due to a predetermined external force, even if they bend up to the permissible limit, they maintain a substantially normal shape to prevent the entry of people or objects, and if the permissible limit is exceeded, they bend at the boundary portion 84i to prevent injury to people or damage to objects.

[0037] [Second Embodiment] The following describes the platform fence incorporating the intrusion prevention device of the second embodiment.

[0038] Figure 6 is a side view showing the platform fence 100 incorporating the intrusion prevention device of the second embodiment. On the track side of the platform fence body 30, one intrusion prevention device 281 is fixed to the upper part adjacent to the first end 32 (see Figure 2(A)), and an object sensor 48 is fixed below the intrusion prevention device 281. The object sensor 48 is provided to detect whether or not there are people or objects between the gate body 20 and the vehicle clearance above the track. The object sensor 48 protrudes into the restricted area AR2 and restricts the intrusion of people and objects in the same way as the intrusion prevention device 82 shown in Figure 2(A). For this reason, in the case of the platform fence 100 of the second embodiment, the intrusion prevention device 82 shown in Figure 2(A) is omitted.

[0039] Figure 7(A) is a side view of the rear side of the intrusion prevention device 281, Figure 7(B) is a top view of the intrusion prevention device 281, and Figure 7(C) is an end view of the base side of the intrusion prevention device 281.

[0040] The intrusion prevention device 281 comprises a restricting member 84 and a fixing member 285, and is directly fixed to the cover member 71 of the platform fence body 30 shown in Figure 6. The restricting member 84 and the fixing member 285 are integrated. The intrusion prevention device 281 has a structure in which a sheet-like reinforcing member 88 is attached to a flat plate portion of a base material 87 which has a shape bent at a right angle at one end. The restricting member 84 includes a plurality of element members 84a arranged in the width direction D3 along the plate surface intersecting the first direction D1 or the -X direction, and the plurality of element members 84a are connected by boundary portions 84i. Of the intrusion prevention device 281, the fixing member 285 at the base has an L-shaped cross section and functions similarly to the fixing member 85 of the intrusion prevention device 81 of the first embodiment shown in Figure 2(A), etc. For this reason, a plurality of holes 84h are formed in the fixing member 285. The fixing member 285 has a plate-shaped first member 285a, a plate-shaped second member 285b extending in a direction perpendicular to the first member 285a, and a reinforcing projection 285c formed at the connection between the two members 285a and 285b. The first member 285a extends parallel to the cover member 71 of the platform fence body 30 shown in Figure 6 and is fixed to the cover member 71. The second member 285b is supported by the first member 285a and extends parallel to the YZ plane. The second member 285b also functions as an element member 84a of the restricting member 84. As a result, the restricting member 84, which is formed by combining the second member 285b and a plurality of element members 84a further forward, is supported by the first member 285a or the fixing member 285 and extends parallel to the YZ plane.

[0041] The intrusion prevention device 281 shown in Figure 7(A), etc., allows for adjustment of its width in the Y direction or horizontal direction by detaching one or more element members 84a. When a stress below a predetermined stress is applied in the first direction D1, the intrusion prevention device 281 bends as a whole, preventing people or objects from passing in the first direction D1 toward the restricted area AR2. Furthermore, when a stress exceeding a predetermined stress is applied in the first direction D1, the intrusion prevention device 281 bends at the boundary portion 84i, preventing injury to people or damage to objects.

[0042] 〔others〕 This invention is not limited to the embodiments described above, and can be implemented in various forms without departing from its spirit.

[0043] The shapes of the intrusion prevention devices 81 and 281 shown in Figures 3(A), 7(A), etc., are merely examples, and the overall contour shape of the intrusion prevention devices 81 and 281 can be changed to something other than a rectangle. Furthermore, openings can be provided in the limiting member 84 that constitutes the intrusion prevention device 81 and 281 to allow for transparency. Regarding the boundary portion 84i, it is not limited to having a V-groove GV that extends uniformly in the ±Z directions vertically; a V-groove GV can also be provided locally between the upper and lower ends.

[0044] Figure 8 is a rear side view illustrating a modified example. In this case, an opening 84j is formed in the base material 87 at the boundary 84i, and the reinforcing member 88 is exposed when viewed from the -X direction, which is the side of the restricted area AR2 (see Figure 6). The opening 84j may also penetrate the reinforcing member 88.

[0045] The intrusion prevention device 81 may be fixed without using a fixing member 85 by providing a slot in the platform fence body 30 and fitting the base end of the restriction member 84 into this slot.

[0046] In the above, the shapes and structures of the door body 20 and the platform fence body 30 are merely examples, and the intrusion prevention devices 81, 82, and 281 of the present invention can be applied to various types of platform fence elements 10 or platform fences 100.

[0047] The intrusion prevention devices 81, 82, and 281 can be installed not only on platform fences 100, but also in various other locations to deter people from entering restricted narrow areas. [Explanation of Symbols]

[0048] 10...Platform fence element, 20...Door body, 21...Main door body, 22...Subordinate door body, 30...Platform fence main body, 31...Housing, 31d...Top plate member, 35a,36a...End opening, 38...Seat member, 40...Control device, 48...Object sensor, 50...Guide mechanism, 60...Drive mechanism, 71...Cover member, 81,82,281...Intrusion prevention device, 84...Restriction member, 84a...Element member, 84h...Hole, 84i...Boundary part, 84j...Opening, 85...Fixing member, 87...Base material, 88...Reinforcement member, 89...Core wire material, 100...Platform fence, AR1...Passage area, AR2...Prohibited area, CC...Communication line, D0...Opening / closing direction, D1...First direction, D2...Second direction, D3...Width direction, F1, F2…External force, GA…Gap, GV…V-groove, PF…Platform, PR…Element member, RL…Track

Claims

1. An intrusion prevention device comprising a plate-shaped restricting member that obstructs passage in a first direction, The limiting member includes a plurality of element members arranged in the width direction along the plate surface intersecting the first direction and connected at the boundary portion, The plurality of element members bend at the boundary portion due to a predetermined external force. Intrusion prevention device.

2. The system further includes a fixing member for fixing one end of the restricting member in the width direction to the track side of the platform fence body. The intrusion prevention device according to claim 1.

3. The aforementioned plurality of element members are more prone to bending by an external force in a second direction opposite to the first direction than by an external force in the first direction. The intrusion prevention device according to claim 1.

4. The boundary between a pair of adjacent element members is formed to be thin and has a groove extending along the boundary in the first direction. The intrusion prevention device according to claim 3.

5. The element member can be cut at the boundary and separated from the tip side of the boundary. The intrusion prevention device according to claim 4.

6. The limiting member has a number of core wires embedded so as to cross the thin boundary portion and prevent the element member on the tip side of the boundary portion from separating when bent. The intrusion prevention device according to claim 5.

7. The limiting member has a thin plate-shaped reinforcing member on the surface on the second direction side. The intrusion prevention device according to claim 5.

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