JP2017106191A - Temporary stairs - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide portable type temporary stairs for improving safety of the liftable movement of an operator, by facilitating the liftable movement of the operator between a platform and a track, by forming a stairs type hoistway in a step difference part between the platform and the track.SOLUTION: Portable type temporary stairs (1) comprise left-right stringers (2), a plurality of footboards (3), a support part (5) arranged in an upper end part of the respective stringers, a leg part (6) arranged in a lower end part of the respective stringers and a collapsible handrail assembly (4). The support part is supported by an edge part upper surface of a platform (P) of a railway, and the leg part is grounded on an upper surface of a track (T) of the railway. The handrail assembly is arranged in at least one stringer. The stringer is installed between the platform and the track so as to incline at an angle (θ) within a predetermined range to a horizontal plane, and the footboard forms stairs being liftable by forward walking between the platform and the track.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a portable temporary staircase, and more particularly, to a portable temporary staircase that forms a walkable lift passage between a railway platform and a track (track).

  Railways such as conventional railways, high-speed railways, subways, and monorails are provided at each station for tracks that form the route of railway vehicles, passengers getting on and off vehicles, and loading and unloading cargo. And a platform. The track includes rails (rails) that guide the traveling of the railway vehicle, sleepers for maintaining the distance between the rails, a roadbed that supports the sleepers and transmits the vehicle weight to the roadbed. In general, the track is located below the platform, and the platform forms the upper floor above the track in the railway. A relatively large step (altitude difference of about 1 to 2 m) is formed between the platform and the track. ) Is formed.

  In general, in railways, maintenance work such as periodic maintenance and inspection of railroads, repair work of railroads, cleaning of railroads, etc., removal of fallen objects on the track, etc. is carried out as appropriate. Executed at midnight after the last train and before the first train. In such work, workers and the like move up and down relatively frequently between the platform and the track. For such up and down movement, a portable ladder that can be easily installed on the edge of the platform is used. used. This kind of ladder is normally stored in the station building or in the warehouse or storage of the station as appropriate, and workers etc. carry the ladder to the edge of the platform during use and put the ladder legs on the track. In addition to grounding, the top of the ladder column is supported on the edge of the platform. As a result, a substantially vertical hoistway is formed at the edge of the platform by the ladder.

  Such a ladder for maintenance management or construction is a relatively rigid or highly rigid structure that is used systematically in railway maintenance management or construction. On the other hand, a relatively light and low-rigidity vehicle ladder that is temporarily used in an emergency or the like is described in, for example, Patent Documents 1 and 2 (Japanese Patent Laid-Open Nos. 2007-170098 and 2004-314788). Yes. The ladders described in Patent Documents 1 and 2 allow passengers, passengers, etc. in the vehicle to move or evacuate on the track when the vehicle stops emergencyly on the railway line between stations due to a failure of a railway vehicle or a railway accident. Is a portable ladder used for In order to reduce the overall volume of the ladder, the ladder has a foldable or telescopic structure, and is usually stored or arranged in a proper position in the vehicle in a relatively compact state.

JP 2007-170098 A JP 2004-314788 A

  In general, workers who use a ladder need to lift and lower the ladder in a daily forward-facing walking posture, with the hands holding the vertical pillar of the ladder firmly with both hands to prevent the body from falling backwards, etc. I can't. However, in operations such as track maintenance and inspection, track repair work, and track cleaning, workers and the like often carry or carry maintenance inspection tools, replacement parts / members, cleaning supplies, and the like. For this reason, the situation where a vertical ladder must be raised and lowered in an unstable posture with a tool or the like held in one hand occurs relatively frequently.

  In addition, since the workers ascend and descend the ladder with their backs facing the track, they must land on the track with a relatively unstable posture when descending on the track from the platform. However, the track is composed of a quarry surface or the like on which rails and sleepers are laid, and an operator or the like is not always able to land both feet on a flat ground surface.

  The present invention has been made in view of such circumstances, and an object of the present invention is to form a stepped hoistway at a step portion between the platform and the track so that an operator between the platform and the track can be provided. It is an object of the present invention to provide a portable temporary stair that facilitates the lifting and lowering movement of the worker and the like and improves the safety of the lifting and lowering movement of an operator and the like.

In order to achieve the above object, the present invention is a portable temporary staircase having left and right side girders and a plurality of step boards supported by the side girders,
A support portion that is disposed at the upper end portion of each side beam, is supported on the upper surface of the edge of the railway platform, and is seated on the upper surface of the edge in order to ensure the level of the upper surface of the tread plate;
Legs placed at the lower end of each side beam and grounded to the upper surface of the railroad track,
A foldable handrail assembly disposed on at least one side beam,
The side girders are installed between the upper surface of the platform edge and the track so as to incline at an angle within a predetermined range with respect to a horizontal plane. A portable temporary staircase is provided that is formed between an upper surface of an edge of a platform and the track.

  According to the said structure of this invention, a tread forms the stair-type hoistway which can be raised / lowered by a forward-facing walk attitude | position between a platform and a track | orbit. For this reason, the worker who gets off to the platform can land on the track while watching the track. In addition, an operator or the like can get down the stairs by grasping the handrail with one hand. Therefore, according to the portable temporary staircase of the present invention, it is possible to easily move the operator up and down between the platform and the track and improve the safety of the operator up and down movement.

  According to the portable temporary staircase of the present invention, a stairway hoistway is formed at a step portion between the platform and the track, facilitating the up-and-down movement of the worker between the platform and the track, The safety of the up-and-down movement can be improved.

FIG. 1 (A) is a side view showing a configuration of a portable temporary staircase according to a preferred embodiment of the present invention, and FIG. 1 (B) shows an extension dimension of an extension rod (rod-like member or rod-like member). FIG. 1C is a partial side view of the stair leg portion showing a shortened state, and FIG. 1C is a stair leg showing a state in which the inclination angle of the side beam is changed by pivoting or rotating the grounding member of the stair leg portion. It is a partial side view of a part. FIG. 2 is a front view of the temporary staircase shown in FIG. FIG. 3 is a side view of the temporary staircase shown in a folded state (storage position) of the handrail assembly. FIG. 4A is a side view showing a state in which a temporary staircase is installed between a platform and a track with a relatively small height difference, and FIGS. 4B and 4C show a track whose upper surface is inclined. It is a partial side view of the temporary staircase which shows the state which installed the temporary staircase with respect to. FIG. 5 is a side view showing a state (storage state) in which temporary steps at the storage position shown in FIG. 3 are stacked. FIG. 6 is a cross-sectional view showing the positional relationship between the support portion of the temporary staircase and the upper surface of the edge of the platform.

  According to a preferred embodiment of the present invention, the angle (θ) is preferably set in the range of 35 to 55 degrees, and more preferably in the range of 40 to 50 degrees. According to such a configuration, it is possible to reliably prevent the temporary stair from falling over to the track side as a whole due to the weight shift of an operator or the like who has grasped the handrail.

  Preferably, the leg portion includes an expansion / contraction flange portion attached to the beam member so as to be relatively displaceable in the axial direction of the beam member, and a grounding portion that contacts the track. The part is pivotally or pivotably connected. According to such a configuration, the temporary staircase can be appropriately installed according to the height difference between the platform and the track by the expansion and contraction of the expansion and contraction flange portion. In addition, the pivoting or turning of the grounding member can change the angle between the grounding surface of the leg and the axis of the beam, so that temporary stairs can be installed appropriately according to the inclination of the raceway surface, etc. can do.

  More preferably, the temporary stair has a bearing position setting means for setting and changing the height position of the bearing part relative to the girder. By changing the setting of the height position of the support portion by the support position setting means, the temporary staircase can be appropriately installed according to the height difference between the platform and the track. The support position setting means includes, for example, a plurality of bolt holes arranged at specific height positions of the girders, and a bolt / nut assembly that is inserted through the bolt holes and supports the horizontal rod of the support part. The

  Hereinafter, a portable temporary staircase according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1A and FIG. 2 are a side view and a front view showing the configuration of a portable temporary staircase according to a preferred embodiment of the present invention.

  1 and 2 show a railroad track T and a platform P constituting an upper floor in the railroad. A portable stairs 1 (hereinafter referred to as “stairs 1”) is suspended between the edge of the platform P and the track T. The height difference ΔH between the platform P and the track T is about 1.2 to 1.5 m (for example, 1.3 m), and the stairs 1 has an inclination angle θ within a predetermined range with respect to the horizontal plane. Inclined to. In this example, the inclination angle θ is preset to an angle (for example, 43 degrees) within a range of 35 to 55 degrees, preferably within a range of 40 to 50 degrees.

  The staircase 1 includes a pair of left and right side girders 2, a plurality of step plates (step plates) 3 supported by the left and right side girders 2, a foldable handrail assembly 4 attached to one side plate 2, It is comprised from the support part 5 arrange | positioned at the upper end part of the side beam 2, and the leg part 6 arrange | positioned at the lower end part of each side plate 2. As shown in FIG. In this example, the inclination angle θ is the angle of the axis of the side beam 2 with respect to the horizontal plane. The main parts of the side girder 2, the footboard 3, the handrail assembly 4, the support part 5 and the leg part 6 are made of processed products of aluminum alloy members, such as flexible elastic members such as resin and rubber, and high rigidity. Steel members or steel parts are arranged at appropriate positions of the respective parts as necessary. The support portion 5 contacts the upper surface of the edge portion of the platform P. The leg 6 is disposed between the left and right rails (rails) R constituting the track T, and contacts the quarry surface of the roadbed Q. As shown in FIG. 2, a top opening type container 7 that can accommodate an insulating cover (not shown) is formed integrally with the side beam 2 on one side. The insulating cover is for covering the rail R in the vicinity of the staircase 1 in order to insulate workers and the like from the rail R.

  The footboard 3 is fixed to the left and right side girders 2 by a bolt / nut assembly 31. As shown in the partially enlarged view of FIG. 1A, the foot board 3 is fixed to the side beam 2 so that a substantially horizontal tread surface 30 is formed. In this example, the tread surface 30 is oriented in a direction that forms an angle θ with respect to the side beam 2.

  The handrail assembly 4 includes a plurality of support columns 40 supported by the side girders 2, a handrail member 41 connected to the upper end of the support column 40, and a cane member 42 that structurally stabilizes the handrail assembly 4. It consists of. The lower end portion of each column 40 is connected to the side beam 2 by a pivot 43 so as to be pivotable or rotatable. The handrail member 41 is pivotally or pivotally connected to the upper end portion of the support column 40 by a pivot coupling tool 44. One end of the cane member 42 is pivotally or pivotally connected to an intermediate height position (a predetermined height between the lower end and the upper end) of the support column 40 by a pivot 45. The other end of the cane member 42 has a locking tool 46, and the locking tool 46 is detachably connected to a pin 47 projecting from the central portion of the handrail member 41.

  FIG. 3 is a side view of the staircase 1 showing the handrail assembly 4 in a folded state. By disengaging the locking tool 46 and the pin 47, the structural stability of the handrail assembly 4 is lost, and the handrail assembly 4 can be folded as shown in FIG. The locking tool 46 is locked to the pin 48 on the handrail member 41, and the handrail assembly 4 is held in the retracted position (folded state) shown in FIG.

  As shown in the partially enlarged view of FIG. 1A, the support portion 5 is composed of a horizontal rod 50 and a plurality of seating members 51 attached to the lower surface of the horizontal rod 50. A plurality of bolt holes 53 are formed at the upper end of the side beam 2 at intervals in the horizontal direction. The horizontal rod 50 is firmly fixed to the upper end portion of the side beam 2 by a bolt / nut assembly 52 penetrating the bolt hole 53, and protrudes horizontally from the side beam 2 to the platform P side. The elastic seating member 51 is made of an elastic member such as resin or rubber, and is seated on the upper surface of the edge of the platform P. When the elastic seating member 51 is seated on the upper surface of the edge of the platform P, the inclination angle θ of the side beam 2 is substantially fixed, and the horizontality of the tread surface 30 is ensured.

  The horizontal rod 50 can be removed from the side beam 2 by loosening / releasing the bolt / nut assembly 52. The side beam 2 is provided with a bolt hole 54 for fixing the horizontal rod 50 to the side beam 2 at a height position different from that of the bolt hole 53.

  FIG. 4A is a side view showing a state where the staircase 1 is installed on the platform P having a height difference ΔH ′ smaller than the height difference ΔH. FIG. 4 (A) shows a state in which the horizontal rod 50 is fixed by inserting the bolt / nut assembly 52 into the bolt hole 54 located in the vicinity of the uppermost step board 3. When the height difference ΔH ′ is further smaller, the horizontal rod 50 may be fixed to the bolt hole 54 positioned in the vicinity of the step board 3 further below the uppermost stage.

  As shown in FIG. 1A, the side beam 2 is further provided with a bolt hole 55 for holding the horizontal rod 50 in the retracted position when the staircase 1 is not used. As shown by a broken line in FIG. 3, the horizontal rod 50 is oriented parallel to the side beam 2 by the bolt and nut assembly 52 inserted through the bolt hole 55 and is held by the side beam 2. In such a state, the horizontal rod 50 is arranged so as to be within the range of the width dimension of the side beam 2.

  FIG. 5 is a side view showing a state in which the stairs 1 at the storage position shown in FIG. 3 are stacked.

  As shown in FIG. 3, the staircase 1 in the storage position where the handrail assembly 4 is folded and the horizontal rod 50 is held by the bolt holes 55 can be stacked up and down as shown in FIG. 5. Spacers 9 that allow the staircase 1 to be stacked are integrally formed on the upper and lower ends of the side beam 2. According to such a configuration, as shown in FIG. 5, a large number of stairs 1 can be stored compactly in a station warehouse, storage, etc., which is extremely advantageous in practice. In addition, the staircase 1 having such a compact storage configuration is extremely advantageous at the time of transfer.

  Next, the configuration of the leg portion 6 will be further described with reference to FIGS. 1, 3, and 4. As shown in the partial enlarged view of FIG. 1 (A), the leg portion 6 includes a holding fixture 60 fixed to the lower end portion of the side beam 2, and an expansion / contraction rod 61 connected to the side beam 2 by the holding device 60, It is comprised from the earthing | grounding member 62 connected with the front-end | tip part (lower end part) of the expansion-contraction collar 61. FIG. The telescopic rod 61 is made of, for example, a rectangular metal tube with a reinforcing metal core. An anchoring tool 65 such as a screw or a bolt penetrating the holding tool 60 is screwed into the screw hole 63 of the telescopic rod 61, and the telescopic rod 61 is coaxially and integrally connected to the side beam 2. A number of screw holes 63 are formed in the telescopic rod 61 at equal intervals, and a plurality of anchoring tools 65 are arranged in the holder 60 at the same intervals as the screw holes 63. The relative position between the anchoring device 65 and the screw hole 63 is appropriately set according to the height difference ΔH between the platform P and the track T.

  As shown in FIG. 3, the total length of the telescopic rod 61 and the side beam 2 can be set and changed within the range of lengths L1 to L2 in accordance with the expansion / contraction position of the telescopic rod 61. It is screwed into the screw hole 63 corresponding to the expansion / contraction position of the flange 61 and tightened. For example, when the height difference ΔH between the platform P and the track T is relatively small, as shown in FIG. 1B, the extension dimension of the telescopic rod 61 can be shortened, and the stairs 1 can be adapted to the height difference ΔH. The difference between the lengths L1 and L2, that is, the extensible dimension ΔL of the telescopic rod 61 is set to a value of about 300 to 400 mm, for example.

  As shown in FIG. 1A, the grounding member 62 is connected to the telescopic rod 61 by a bolt / nut assembly 64 that penetrates the end of the telescopic rod 61. The shaft portion of the bolt / nut assembly 64 is supported so that the grounding member 62 can pivot or rotate. The grounding member 62 is made of an elastic member such as resin or rubber, and is grounded to the quarry surface of the roadbed Q or the like. If desired, the inclination angle θ of the side beam 2 can be changed to an angle θ ′ as shown in FIG. However, this angle change is within a range that does not significantly impair the levelness or walking feeling of the tread 30.

  Further, in many tracks having relatively large curves, the upper surface of the road bed Q is inclined as shown in FIGS. 4B and 4C. Even in such a track, the inclination angle θ of the side beam 2 can be maintained by the pivoting of the grounding member 62.

  Next, the usage method of the said staircase 1 is demonstrated.

  The staircase 1 is folded as shown in FIG. 5 with the handrail assembly 4 folded, the horizontal hook 50 held in the retracted position by the bolt holes 55, and the telescopic hook 61 is retracted. Stored in. In use, an operator or the like carries the staircase 1 in this state to the use site of the platform P, raises the handrail assembly 4 on the platform P, and sets the horizontal rod 50 to the side girder so as to correspond to the height difference H. 2 and the expansion / contraction position of the expansion / contraction rod 61 is set. Thereafter, as shown in FIGS. 1 and 4, the grounding member 62 is grounded to the quarrying surface of the roadbed Q and the seating member 51 of the support portion 5 Seat on the upper surface of the edge of the platform P.

  Since these operations can be performed by an operator or the like on the platform P, the operator or the like can install the stairs 1 on the platform P without getting down on the track T in advance. This is extremely advantageous in view of work efficiency, speed and safety. The final fine adjustment of the staircase 1 may be performed after the staircase 1 is installed on the platform P, if necessary.

  FIG. 6 is a cross-sectional view showing the positional relationship between the support portion 5 and the upper surface of the edge of the platform P.

  As shown in FIG. 6 (A), each horizontal rod 50 provided on each of the left and right side girders 2 has at least two seating members 51 arranged at intervals in the axial direction of the horizontal rod 50. When the stairs 1 are inclined at a predetermined inclination angle θ, the two seating members 51 are seated on the upper surface of the edge of the platform P in a state where they are uniformly compressed and deformed by the weight of the stairs 1. However, the inclination angle of the staircase 1 with respect to the upper surface of the platform P may be different from the predetermined inclination angle θ due to the inclination, inclination, unevenness, etc. of the upper surface of the platform P and the difference in the contact position of the grounding member 62.

  As shown in FIGS. 6B and 6C, when the inclination angles θ1 and θ2 of the stairs 1 with respect to the upper surface of the platform P are slightly different from the predetermined inclination angle θ, one of the seating members 51 is relatively Largely deformed by compression. For this reason, the two seating members 51 maintain the seating state of the support portion 5 with respect to the platform P. On the other hand, as shown in FIGS. 6D and 6E, when the inclination angles θ3 and θ4 of the stairs 1 with respect to the upper surface of the platform P are greatly different from the predetermined inclination angle θ, one of the seating members 51 becomes the platform P. Separate from. However, the other seating member 51 is greatly compressed and deformed, and the seating state of the support portion 5 with respect to the platform P is maintained.

  That is, each horizontal rod 50 has a plurality of seating members 51 arranged at intervals in the axial direction thereof, and all the seating members 51 are seated on the upper surface of the platform P by elastic deformation of the seating members 51. Alternatively, some of the seating members 51 are separated from the upper surface of the platform P, but by maintaining the state where at least one seating member 51 is seated on the platform P, the actual inclination angles θ1 to θ4 of the staircase 1 can be obtained. The difference from the predetermined inclination angle θ is compensated.

  1 and 4 show a state in which the staircase 1 is installed on the platform P. An operator or the like can move up and down the stairs 1 by forward walking as shown in FIGS. 1 and 4. For this reason, even if the operator etc. are the state which carried the tool etc. at the time of raising / lowering, it can raise / lower between the platform P and the track | truck T comparatively easily. In addition, since the worker or the like can walk up and down the stairs 1 while holding the handrail member 41 with fingers, the safety of the lifting operation of the worker or the like is considerably improved.

  The used stairs 1 is lifted on the platform P by an operator on the platform P or the like. The handrail assembly 4 is folded to the storage position (FIG. 3), and the stairs 1 are stacked as shown in FIG. 5 and stored compactly in a warehouse, storage, etc. without being bulky.

  The preferred embodiments and examples of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments and examples, and is within the scope of the present invention described in the claims. Various modifications or changes are possible.

  For example, the temporary staircase of the present invention can be used not only for maintenance / inspection work carried out at midnight or the like, but also for raising and lowering to collect fallen objects that fall on the track from the platform during railway operation. It can also be used effectively as a means.

  In the above embodiment, the main part of the staircase components (side girders, footboards, handrail assemblies, etc.) has been described as being made of a processed product of an aluminum alloy member, but other alloy parts, steel The staircase component may be manufactured using a manufactured part or a resin part.

  Further, in the above embodiment, the handrail assembly is disposed only on one side of the temporary staircase, but the handrail assembly may be disposed on both sides of the temporary staircase.

  Further, in the above embodiment, the support portion is detachably fixed to the side beam by the bolt and nut assembly, but the support portion is configured to be movable so that it moves to the storage position when the stairs are not used. Also good.

  Further, the shape, the structure and dimensions of the staircase components can be appropriately changed according to the shape and dimensions of the temporary staircase.

  The present invention is applied to a portable temporary stair that forms an elevating walkway between a railway platform and a track (track). According to the portable temporary staircase of the present invention, a stepped hoistway is formed at the step portion between the platform and the track constituting the upper floor in the railway, so that the operator and the like can move up and down between the platform and the track. Since it can make it easy and the safety | security of the raising / lowering movement of an operator etc. can be improved, it is very advantageous practically.

DESCRIPTION OF SYMBOLS 1 Portable temporary stair 2 Side girder 3 Footboard 4 Handrail assembly 5 Bearing part 6 Leg part 7 Top opening type container P Platform T Track R Rail (rail)
Q Road bed ΔH, ΔH 'Height difference θ Inclination angle

Claims (4)

A portable temporary stair having left and right side girders and a plurality of step boards supported by the side girders,
A support portion that is disposed at the upper end portion of each side beam, is supported on the upper surface of the edge of the railway platform, and is seated on the upper surface of the edge in order to ensure the level of the upper surface of the tread plate;
Legs placed at the lower end of each side beam and grounded to the upper surface of the railroad track,
A foldable handrail assembly disposed on at least one side beam,
The side girders are installed between the upper surface of the platform edge and the track so as to incline at an angle within a predetermined range with respect to a horizontal plane. A portable temporary staircase formed between an upper surface of an edge of a platform and the track.   The portable temporary staircase according to claim 1, wherein the angle (θ) is set to an angle within a range of 35 to 55 degrees.   The leg portion has an expansion / contraction flange portion attached to the beam member so as to be relatively displaceable in the axial direction of the beam member, and a grounding portion that comes in contact with the track. The portable temporary staircase according to claim 1 or 2, wherein the portable temporary staircase is connected to the portion so as to be pivotable or pivotable.   The portable temporary stair according to any one of claims 1 to 3, wherein the temporary stair has a support position setting means for setting and changing a height position of the support with respect to the girder. .

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