JP6589830B2 - Passenger conveyor - Google Patents

Description

  The present invention relates to escalators and other passenger conveyors, and more particularly to seismic reinforcement technology.

  As for the escalator, a part of each support member provided at both ends of the truss is respectively hung on a cradle fixed to the upper frame part of the building and a cradle fixed to the lower frame part of the building, Installed in the building (hanging upstairs and downstairs). Here, a portion of the support member that is hung on the cradle is referred to as a support portion.

  By the way, when several events that caused the escalator to drop out of the building enclosure due to the recent Great East Japan Earthquake were confirmed, the Ministry of Land, Infrastructure, Transport and Tourism revised the existing Building Standards Law Enforcement Order (2013 Ministry of Land, Infrastructure, Transport and (Effective April 1, 2014), taking measures to prevent the escalator from falling off. Specifically, it is required to set the length of the allowance for the housing portion of the support portion to be longer than before.

  New escalators installed after the effective date of the notice are required to satisfy the above requirements. On the other hand, for existing escalators installed before the enforcement date, basically, there is no legal requirement to satisfy the above requirements, but there are requests from customers who want to strengthen earthquake resistance. There is a request to extend the length of the bill based. Moreover, when extending a building, it is calculated | required that the said request | requirement should be satisfied also about the existing escalator installed in the building before extension.

  In this regard, Patent Document 1 discloses a technique for extending the length of the cost for an existing escalator.

  In Patent Document 1, an upper plate of a support member made of an equilateral angle steel whose one side is fixed to the end of the truss is welded to the upper surface of a support part consisting of the other side extending horizontally from the truss. And an extension member having a lower plate fixed to the lower surface of the upper plate protruding from the end of the support portion and mounted on the housing portion, with the upper plate being stacked on the support portion, is fixed to the support member. The escalator formed is described (FIGS. 4 to 6 and the like of Patent Document 1).

  According to this, the width of the lower plate (the length L1 shown in FIG. 5 of Patent Document 1) is extended, and the length of the starting margin is extended, and the long side direction of the horizontal projection forming the substantially rectangular shape of the truss (Hereinafter, simply referred to as “long side direction”), the prevention of the escalator from falling off the building frame due to the interlayer displacement occurring in the building is strengthened.

  In addition, in the notification of the Ministry of Land, Infrastructure, Transport and Tourism, the escalator is a building beam or the like (frame part) due to the interlayer displacement occurring in the building in the short side direction of the horizontal projection (hereinafter simply referred to as “short side direction”). It is stipulated that the structure should not collide with In order to achieve this structure, a stopper is provided as a restricting means for restricting displacement in the short side direction of the support part so as to face both ends in the short side direction of the support part. The existing escalator is also provided with a stopper, and is generally fixed to the cradle by welding. The stoppers restrict the displacement in the short side direction of the support portion, and thus the truss, etc., thereby avoiding the above-mentioned collision.

Japanese Patent No. 5985685 Japanese Patent Laid-Open No. 4-179691 Japanese Patent Laid-Open No. 2006-69100

  The notice also requires the above regulations to be tightened with fasteners. In response to this, for example, an existing stopper is removed and a stopper having a higher strength is welded to the cradle, or a member provided to extend the cost (in Patent Document 1, the lower It is conceivable that a reinforcing metal fitting is newly fixed by welding so as to face each of both end portions in the short side direction of the plate.

  Support members, etc. are erected on a cradle laid on the bottom of a step-down part dug down from the building floor in the building, and the step-down part uses an escalator to save space for escalator installation. It is the minimum size required for new construction. For this reason, it is common that there is only a narrow gap between the support portion and the side wall of the step-down portion that is sufficient to provide an existing stopper.

  Therefore, in the state where the escalator has already been installed, in order to provide a new stopper with increased strength in this narrow gap, the space necessary for the welding operation is insufficient, which is actually difficult.

Although the space required for welding work can be secured by digging down the stepped portion and extending in the short side direction, depending on the installation location of the escalator in the building, for example, with respect to the side wall of the stepped portion A wall rising from the building floor may be approaching. In this case, the stepped-down portion cannot be dug out and expanded as described above.
In addition, the above-mentioned subject is common also to the inclined type moving sidewalk which is another passenger conveyor.

  In view of the above-described problems, it is possible to provide a new restricting means (fastening metal fitting) while increasing the cost and without expanding the stepped-down portion in which the support portion is accommodated in the short side direction of the truss as much as possible. An object of the present invention is to provide a passenger conveyor having a configuration applicable to an existing passenger conveyor.

  In order to achieve the above object, the passenger conveyor according to the present invention is provided at an end portion in the long side direction of the truss, and the flat support portion extending horizontally in the long side direction is one step lower than the building floor. It is a passenger conveyor having a configuration hung on a cradle laid at the bottom of the stepped-down part, which is fixed by overlapping a part on the upper surface of the support part, from the support part in the long side direction A first extension plate member having a first extension portion extending to the opposite side of the truss, and a part of the first extension plate member that is fixed to the upper surface of the support portion. A second extension plate member provided on the opposite side of the truss, the second extension plate member provided at an interval in the short side direction of the truss; The first extension part and the second part in the short side direction The first extension portion is disposed between the first extension portion and the second extension portion to be displaced in a direction in which the second extension portion exists, and the second extension portion is disposed between the first extension portion and the first extension portion. And a restricting means for restricting displacement in the direction in which the extending portion exists.

  Further, the restricting means includes a first stopper that restricts displacement of the first extending portion in a direction in which the second extending portion exists, and the second extending portion includes the second extending portion. And a second stopper that restricts displacement in the direction in which the first extension portion exists.

  Furthermore, each of the both end portions in the short side direction of the support portion is hung on the cradle via first and second height adjustment shims, and the first extension plate member is The part is overlaid on an upper surface portion of the support portion above the first height adjustment shim, and the second extension plate member is an upper surface of the support portion above the second height adjustment shim. The part is overlapped with the part.

  In this case, the stepped portion is relatively displaced by the maximum distance assumed by the earthquake in a direction away from the truss in the long side direction, and is flat on each of the first and second height adjustment shims. In a state where the first extension part and the second extension part overlap each other as viewed, only the partial areas near the truss on the top surfaces of the first and second height adjustment shims are the first and second parts respectively. An upward step is provided on the lower surface portions of the first and second extension portions that overlap with the remaining region in plan view so as to be in contact with the lower surface of the second extension portion and not to contact the remaining region. It is characterized by.

  According to the passenger conveyor having the above-described configuration, the truss and the truss from the support portion in the long side direction of the first and second extension plate members that are partially overlapped and fixed on the upper surface of the support portion. The margin is increased by the first and second extending portions respectively extending to the opposite sides.

  Further, the first extending portion is restricted from being displaced in the direction in which the second extending portion exists, and the second extending portion is directed in the direction in which the first extending portion exists. Since the restricting means for restricting the displacement is installed between the first extending portion and the second extending portion in the short side direction, in order to provide the restricting means, It is not necessary to expand the stepped-down portion provided with the support portion in the short side direction.

It is a figure which shows schematic structure of the whole escalator which concerns on embodiment installed over the floor of the building between the upper level and the lower level. (A) is a top view of the upper floor end of the escalator and the vicinity thereof, and (b) is a side view thereof. (C) is a top view of the downstairs end part of the said escalator and its vicinity, (d) is the side view. In the existing escalator before the seismic reinforcement of the escalator, (a) is a plan view of the upper floor end and its vicinity, and (b) is a side view thereof. (C) is a top view of the downstairs end of the existing escalator and the vicinity thereof, and (d) is a side view thereof. (A) is the AA line sectional view in Drawing 2 (a), and (b) is the BB line sectional view. (A) is the perspective view which looked at the extension plate member from the upper side, (b) is the perspective view which looked at the extension plate member from the lower side. (A) is a plan view and a side view of a part of the upper end of the escalator and its vicinity in a state where no interlayer displacement occurs in the building. (B) is a plan view and a side view of a part of the upper end of the escalator and its vicinity in a state in which interlayer displacement in the long side direction has occurred in the building. (C) is a plan view and a side view of a part of the upper floor end portion and the vicinity thereof in a state where interlayer displacement in the long side direction has occurred in the building in another example of the escalator.

An embodiment of a passenger conveyor according to the present invention will be described with reference to the drawings, taking an escalator as an example.
The escalator 10 according to the embodiment is a new escalator by applying seismic reinforcement to an existing escalator (hereinafter referred to as “old escalator”). In the following, the escalator 10 will be described roughly divided into existing parts and parts related to seismic reinforcement.

[Parts related to existing facilities]
As shown in FIG. 1, the escalator 10 according to the embodiment includes a plurality of steps 12 that are endless transport bodies that are connected in an annular shape and circulate. A balustrade 14 is installed on both sides of the traveling step 12 (only one balustrade is shown in the figure).

  The balustrade 14 has a balustrade panel 16 erected along the travel path of the step 12. On the outer periphery of the balustrade panel 16, a handrail 18 that is circulated and guided by a guide rail (not shown) is provided.

  Various devices such as an electric motor (not shown) that is a driving source of the plurality of steps 12 and the handrail 18 are incorporated in a truss 20 formed of an assembly of members such as L-shaped steel. The balustrade 14 is assembled on the truss 20.

  An upper support member 22 and a lower support member 28 are fixed to both ends of the truss 20 in the long side direction. The upper support member 22 and the lower support member 28 are made of angle steel having a length that extends over substantially the entire width (length in the short side direction) of the truss 20 (FIGS. 2A and 2C). Yes.

  In each of the upper support member 22 and the lower support member 28, one side portion 24, 30 of the angle steel is joined to the truss 20 by fillet welding (a weld bead is not shown) or the like. It is fixed. In the fixed angle iron, the other side portions 26 and 32 (hereinafter referred to as “support portions 26 and 32”) extending horizontally from the truss 20 in the long side direction are the parts of the building where the escalator 10 is installed. It is hung on the building frame. Needless to say, if attention is paid only to the support portions 26 and 32, the support portions 26 and 32 have a flat plate shape.

  The support portions 26 and 32 are respectively hung on portions that are one step lower than the building floors US and DS (hereinafter referred to as “step-down portions 34 and 36”, respectively). Part of the bottoms of the step-down parts 34 and 36 corresponds to the upper part of the building beam. In this example, the building beam (frame part) on which the escalator 10 is hung is a reinforced concrete beam. Of course, it may be an escalator hung on other building beams such as steel beams.

  Receiving bases 38 and 40 are laid on the bottoms of the step-down portions 34 and 36 (upper part of the building beam), respectively. As shown in FIG. 2, rectangular steel plates having a slightly longer overall length than the angle steel are used for the cradles 38 and 40.

  One or a plurality of height adjusting shims 42 and 44 are laminated at both ends in the length direction (short side direction) of the cradle 38, and part of the periphery of the shims 42 and 44 is fillet welded (weld bead). Is fixed to the cradle 38 by (not shown). Similarly, at both ends in the length direction (short side direction) of the cradle 40, one or a plurality of height adjusting shims 46 and 48 are stacked, and a part of the periphery thereof is fillet welded ( The weld bead is fixed to the cradle 40 by a not-shown).

  The support portion 26 is hung on the cradle 38 via shims 42 and 44, and the support portion 32 is hung on the pedestal 40 via shims 46 and 48. Therefore, the support portion 26 and the truss 20 and the like are directly supported by the shims 42, 44, 46 and 48.

  The shims 42, 44, 46, 48 are required heights of the support portions 26, 32 from the cradle 38, 40 caused by errors in the design of the building where the escalator 10 is installed or manufacturing errors of the escalator 10. It is provided to eliminate the deviation.

  As described above, the shims 42, 44, 46, and 48 are fixed to the pedestals 38 and 40, respectively. However, the support portions 26 and 32 are not fixed to the shims 42, 44, 46, and 48 (not shown). Fixed). As a result, for example, when the building is shaken by an earthquake or a strong wind and the interlaminar displacement occurs in the long side direction, each of the support portions 26 and 32 slides horizontally on the shims 42, 44, 46, and 48, respectively. To do. Thereby, the load applied to the truss 20 of the escalator 10 from the building is reduced, and damage to the truss 20 is prevented.

  Here, when the interlaminar displacement in the long side direction occurs in the building and the stepped-down part is displaced relatively away from the truss in the long side direction, the horizontal distance that the support part can slide is defined as the "" In the old escalator, the starting allowance length in the support portion 26 is “L1” shown in FIG.

  The shims 42 and 44 are provided at positions corresponding to both end portions in the short side direction of the support portion 26, and the shims 46 and 48 are provided at positions corresponding to both end portions in the short side direction of the support portion 32. This is because the support portions 26 and 32 can be stably supported rather than being provided closer to the center.

[Parts related to seismic reinforcement]
(Pretreatment for seismic reinforcement)
The lower support member 28 is fixed to the cradle 40 by fixing members 50 and 52 (FIG. 3C), which will be described later, and the upper support member 22 (the support portion 26) is opposed to the cradle 38 (the shims 42 and 44). When the old escalator in a so-called one-end fixed state that can be slid in the case of seismic reinforcement, the above-described fixing of the lower support member 28 is released, and the upper and lower support members 22 and 28 are respectively supported by the cradle 38 (the shims 42 and 44), The escalator 10 is a so-called unfixed escalator 10 that is slidable with respect to the cradle 40 (the shims 46, 48).

  FIG. 3 shows an old escalator. As shown in FIG. 3, the lower support member 28 is fixed to a cradle 40 laid on the bottom of the step-down portion 54 via fixing members 50 and 52 made of unequal side angle irons. The fixing members 50 and 52 are joined to the cradle 40 by fillet welding, and the fixing members 50 and 52 and the lower support member 28 are also joined by fillet welding. Thereby, the lower support member 28 is fixed to the cradle 40. In FIG. 2, FIG. 3, and FIG. 6, the weld bead portion by fillet welding is indicated by hatching.

  In the case of seismic reinforcement, the welding bead between the fixing members 50 and 52 and the lower support member 28 is removed to eliminate the joint, and the short sides of the fixing members (unequal angle irons) 50 and 52 are cut off. . As a result, the lower support member 28 can slide with respect to the cradle 40. In FIG. 2C, what is indicated by reference numerals 50R and 52R are the remaining portions of the fixing members 50 and 52 after the short side portions are cut off. The remaining portions 50R and 52R hardly function as constituent members of the escalator 10. In FIG. 2D, the remaining portions 50R and 52R are not shown in order to avoid complexity.

  As shown in FIG. 3A, in the upper support member 22, the displacement of the truss 20 in the short side direction is restricted by stoppers 56 and 58 made of unequal side angle steel. The stoppers 56 and 58 are joined to the cradle 38 laid on the step-down portion 60 by fillet welding. Both end surfaces in the short side direction of the support portion 26 of the upper support member 22 are in contact with the long side portions of the clasps (unequal side angle irons) 56, 58, so that the upper support member 22 and thus the short side of the truss 20 Directional displacement is regulated.

  The short sides of the clasps (irregular angle irons) 56, 58 are cut off because they obstruct the provision of extension plate members 74, 76 (FIG. 2A), which will be described later. In FIG. 2A, what are indicated by reference numerals 56R and 58R are the remaining portions of the fasteners 56 and 58 after the short side portion is cut off. The remaining portions 56R and 58R hardly function as constituent members of the escalator 10. In FIG. 2B, the remaining portions 56R and 58R are not shown in order to avoid complexity.

  The remaining portions 50R, 52R, 56R, and 58R are left to save the trouble of removal, but may be completely removed.

  In addition, in order to secure installation space for extension plate members 74, 76, 78, 80, etc., which will be described later, for seismic reinforcement, the width W1 (FIG. 3 (a)) of the step-down portion 60 is expanded to the width W3 and stepped down. The construction 34 is performed as a stepped portion 36 by extending the width W2 (FIG. 3 (c)) of the stepped-down portion 54 to the width W4 as the portion 34 (FIGS. 2 (a) and 2 (b)). . That is, the construction work for extending the existing stepped portions 54 and 60 in the long side direction is performed.

  And in the step-down part 34, the additional receiving stand 62 is laid in the bottom part of the part which concerns on the said expansion. A steel plate having the same length as the cradle 38 is used for the additional cradle 62. Further, an additional cradle 64 is laid at the bottom of the portion related to the expansion in the step-down portion 36. A steel plate having the same length as the cradle 40 is used for the additional cradle 64.

  After performing the above pretreatment, (i) the upper support member 22 is in a so-called semi-fixed state, (ii) the cost is extended, and (iii) the fastener is strengthened.

(Semi-fixed)
In this example, the quasi-fixed state means that the upper support member 22 is fixed so as not to be displaced in the long side direction until an interlayer displacement of a predetermined scale occurring in the long side direction, and when the interlayer displacement exceeding the predetermined scale occurs. This means that the upper support member 22 is slidable on the shims 42 and 44 after being fixed.

  The configuration enabling the quasi-fixed state will be described with reference to FIGS. 2 (a), 2 (b), and 4 (a). In FIG. 4A, hatching indicating a cross section is omitted.

  A rectangular base 66 is joined to the base 38 and the additional base 62 by fillet welding at the center in the length direction (short side direction) of the base 38 and the additional base 62. A lower semi-fixed plate 68 having a square shape slightly smaller than the base 66 is joined to the base 66 by fillet welding.

  An upper semi-fixed plate 70 is stretched over the upper surface of the support portion 26 of the upper support member 22 and the upper surface of the lower semi-fixed plate 68, and the upper semi-fixed plate 70 is fixed to the support portion 26 by fillet welding.

In the overlapping region of the upper semi-fixed plate 70 and the lower semi-fixed plate 68, the lower semi-fixed plate 68 is provided with an insertion hole 68A penetrating in its thickness direction. An insertion hole 70A that penetrates in the thickness direction and communicates with the insertion hole 68A is provided.
A semi-fixing pin 72 is inserted into both the insertion hole 70A and the insertion hole 68A.

  Here, in describing the process in which the upper support member 22 is released from being fixed to the cradle 38 and the upper support member 22 can slide on the shims 42 and 44, a part of the step-down portion 34 is included. The initial size of the horizontal gap C1 shown in FIG. 2 (b) and FIG. 4 (a) between the upper frame member and the upper support member 22 is D1, and a part of the step-down portion 36 is formed. Let D2 be the initial size of the horizontal gap C2 shown in FIG. 2 (d) between the lower housing part and the lower support member 28.

  When an earthquake occurs and an interlayer displacement occurs, the horizontal distance between the downstairs housing part and the upstairs housing part changes. Accordingly, the lower support member 28 (the support portion 32 thereof) slides with respect to the cradle 40 via the shims 46 and 48, and the gap C2 expands and contracts. On the other hand, since the upper support member 22 (the support portion 26 thereof) is fixed to the receiving base 38 by the upper semi-fixing plate 70, the semi-fixing pin 72, the lower semi-fixing plate 68, and the base 66, the gap The size of C1 remains the initial D1.

  When an earthquake of a predetermined scale occurs, the lower housing part and the upper housing part approach each other beyond the size of C2, and the gap C2 disappears, and a part of the lower housing part and the lower support member 28 The parts collide relatively. Thereby, the truss 20 as a whole is pushed by the lower housing part and tends to be displaced toward the upper housing part. At this time, a horizontal shearing force is applied from the upper semi-fixed plate 70 and the lower semi-fixed plate 68 to the semi-fixed pin 72, the semi-fixed pin 72 is broken, and the upper support member 22 is released from being fixed to the cradle 38. Then, the upper support member 22 (the support portion 26 thereof) can slide with respect to the cradle 38 via the shims 42 and 44.

  The truss 20 is further displaced toward the upper housing portion by the initial size D1 of the gap C1, so that the truss 20 is not damaged by the compressive load received from both upper and lower housing portions. It can be avoided as much as possible.

  As is clear from the above description, the semi-fixed pin 72 maintains the upper support member 22 (support part 26) in a fixed state with respect to the cradle 38 until an earthquake of a predetermined magnitude. The shear strength is such that it breaks. Thereby, a semi-fixed state is realized.

  In addition, when the upper and lower housing parts approach each other due to inter-layer displacement in the long side direction, the old escalator (with one end fixed) can be approached without applying an excessive load to the truss 20. The distance was D1, but the accessible distance was increased by D2 by adopting a non-fixed state at both ends (the “quasi-fixed state” is an aspect of the non-fixed state). (D1 + D2). Thereby, seismic reinforcement from the viewpoint of protecting the truss 20 is performed.

(Extension of cost)
The extension of the cutting allowance is seismic reinforcement from the viewpoint of preventing the truss 20 from falling when the upper housing portion and the lower housing portion are separated by an interlayer displacement in the long side direction.

  2, the pair of extension plate members 74 and 76 are fixed to the upper support member 22 and the pair of extension plate members 78 and 80 are fixed to the lower support member 28, respectively, as shown in FIG. Yes.

  The extension plate member 78 has the same configuration as the extension plate member 74. The extension plate members 76 and 80 have basically the same configuration as that of the extension plate member 74 except that a position where a contact avoidance region described later is provided is different. Accordingly, the extension plate members 74, 76, 78, and 80 will be described with the extension plate member 74 as a representative.

  The extension plate member 74 includes an upper plate 741 and a lower plate 742 as shown in FIG. The upper plate 741 is made of a rectangular steel plate, and has a slit 741A that is opened in the length direction from the center of one short side. The lower plate 742 is made of a rectangular steel plate and has the same thickness as the support portions 26 and 32.

  The lower plate 742 is stacked and fixed on the lower surface of the upper plate 741. In the overlapped state, the lower plate 742 protrudes slightly from the upper plate 741 in the width direction, and the upper surface of the protruding portion and the side surface of the upper plate 741 are joined by fillet welding (the weld bead is not shown). The lower plate 742 is fixed to the upper plate 741.

  A part of the lower surface of the lower plate 742 is provided with an upward step with respect to the other lower surface portion. Hereinafter, the lower surface portion having the stepped portion upward is referred to as a “contact avoidance region 742A”. The position and reason for providing the contact avoidance region 742A will be described later. In FIGS. 2B, 2D, 5, and 6, the size of the step is exaggerated from the actual size.

  In the extension plate member 74 having the above-described configuration, the lower surface of the upper plate 741 is closely overlapped with the upper surface of the support portion 26, and as shown in FIGS. 2 (a) and 2 (b), the lower plate 742 is provided. With one side faced against the end face in the width direction of the support portion 26, it is fixed to the support portion 26 by fillet welding. The upper plate 741 is overlaid on the upper surface position of the support portion 26 overlapping the shim 42 in plan view. As shown in FIG. 2A, the welded portions are part of the side surfaces on both sides in the width direction of the upper plate 741 and the side surfaces of the slit 741A. Thus, by providing the slit 741A and welding the side surface of the slit 741A, the bonding strength can be improved as compared with welding only the side surfaces on both sides in the width direction. One side surface of the upper plate 741 in the length direction is joined to the truss 20 by fillet welding.

  The extension plate member 74 joined to the support portion 26 or the like as described above extends from the support portion 26 to the side opposite to the truss 20 in the long side direction of the truss 20 (that is, to the building floor side). Since the portion 74A (the portion where the lower plate 742 exists) is provided, the allowance for the support portion 26 is extended.

  Here, when the contact avoidance region 742A is not provided (that is, when the lower plate 742 is a steel plate having a uniform thickness), the total length L3 in the long side direction of the truss 20 of the lower plate 742 (FIG. 5, In FIG. 2 (b)), the allowance is extended, but in this example, in order to minimize the extension of the allowance and to avoid the following inconvenience due to excessive extension, the contact avoidance region 742A. Is provided. This will be described with reference to FIGS. In the plan views in FIGS. 2 and 6, the contact avoidance region is shaded.

  As shown in FIG. 2A, the contact avoidance region 742A is provided in a region including the extension of the shim 42 in the long side direction of the truss 20 in a plan view. The position of the contact avoidance region 742A on the extension line will be described with reference to FIG. FIG. 6A shows a state in which no interlayer displacement occurs, and FIG. 6B shows an interlayer displacement that causes the upper and lower casing parts to be separated in the long side direction and lowered from the truss 20. The state where the part 34 is displaced relative to the maximum distance assumed by the earthquake in the direction away from the long side of the truss 20 is shown. FIG. 6C is an example in which the contact avoidance region 742A is not provided in the lower plate 742. Like FIG. 6B, the step-down portion 34 is away from the truss 20 in the long side direction of the truss 20, It shows the state that is displaced relative to the maximum distance assumed by the earthquake. Of course, in FIGS. 6 (b) and 6 (c), the semi-fixed pin 72 (FIGS. 2 (a) and 4 (a)) is broken and the upper support member 22 is moved over the shims 42 and 44. It shows a state in which sliding is possible.

  6 (a), 6 (b), and 6 (c), (i) the lower surface of the support portion 26, (ii) the lower surface of the support portion 26 and the lower plate, and (iii) the lower surface of the lower plate. The load of the truss 20 or the like is supported on the upper surface of the shim 42 that is in contact with any of the above, and the lower surface described in (i), (ii), (iii) "Reaction force"). In the long side direction, the position that receives the fulcrum reaction force is the center of the contact area with the lower surface described in the above (i) to (iii) on the upper surface of the shim 42 as indicated by the arrow R for convenience.

  In the state shown in FIG. 6A, the long side from the intersection to the fulcrum reaction force is at the intersection of the two sides of the upper support member 22 made of angle steel (hereinafter simply referred to as “intersection”). A bending moment M1 = R × P1 is applied according to the distance in the direction (hereinafter referred to as “fulcrum distance”) P1. When interlayer displacement occurs and the fulcrum distance increases, naturally, the bending moment also increases. The old escalator is designed on the assumption that the support portion 26 does not fall off the shim 42, and the strength of the upper support member 22 is designed based on the maximum value of the bending moment generated under the assumption.

  However, in the Great East Japan Earthquake described above, an event was observed in which the escalator fell off (the bearing part dropped from the shim) due to a larger interlayer displacement than previously assumed, so the cost of the bearing part 26 in the old escalator It is necessary to extend L1, and an extension plate member is provided. In this case, as shown in FIG. 6 (c), if the lower plate 822 constituting the extension plate member 82 remains a steel plate having a uniform thickness and no contact avoidance region is provided, interlayer displacement occurs, and When the portion 26 deviates from the shim 42 and the lower plate 822 moves above the shim 42, the entire upper surface of the shim 42 contacts the lower surface of the lower plate 822. In this case, the bending moment M3 applied to the intersection is M3 = R × P3. Since the support portion 26 is completely deviated from the shim 42 and the entire upper surface of the shim 42 (over the entire length in the long side direction of the truss 20) is in contact with the lower surface of the lower plate 822, the moment M3 is There is a high possibility of exceeding the maximum value assumed at the time of design. For this reason, it is necessary to reinforce the upper support member 22 so as not to be damaged. However, considering the narrowness of the work site, etc., it is desired to avoid the reinforcement as large as possible.

  Therefore, a contact avoidance region 742A is provided in the lower plate 742 so that the reinforcement is not performed or the reinforcement is minimal. When the contact avoidance region 742A is provided, as shown in FIG. 6B, the lower plate 742 overlaps the entire shim 42 in plan view, but the lower surface of the lower plate 742 is slightly closer to the truss 20 on the upper surface of the shim 42. Only the partial area is in contact, and the remaining area (area facing the contact avoidance area 742A) is non-contact.

  As a result, the position where the lower plate 742 receives the fulcrum reaction force is closer to the truss 20 than in the case shown in FIG. 6C, and the fulcrum distance P2 is shorter than the fulcrum distance P3. Therefore, the bending moment M2 applied to the intersection in the case shown in FIG. 6B is M2 = R × P2, but M2 is smaller than M3. Thereby, the reinforcement with respect to the upper support member 22 may be smaller than the case shown in FIG.6 (c).

  Here, the length L4 (in this example, the contact length in the long side direction of the truss 20 with the upper surface of the shim 42 on the lower surface of the lower plate 742) shown in FIG. 6B is a predetermined length defined by the Building Standard Law. Length. In other words, by minimizing the extension of the length of the allowance, the magnitude of the bending moment that can be applied to the intersection of the upper support member 22 is minimized. In this example, as shown in FIG. 6A, the cost is extended by L2 from L1 to (L1 + L2).

  Returning to FIG. 2, the extension plate member 78 including the lower plate 782 and the upper plate 781 provided with the contact avoidance region 782A has the same configuration as the extension plate member 74 described above.

  The extension plate member 76 including the lower plate 762 and the upper plate 761 provided with the contact avoidance region 762A, and the extension plate member 80 including the lower plate 802 and the upper plate 801 provided with the contact avoidance region 802A correspond to each other. Except that the positions where the contact avoidance regions 762A, 802A in the lower plates 762, 802 are provided in accordance with the installation positions of the shims 44, 46 are symmetrical to the extension plate members 74, 78 as shown in FIG. This is the same as the extension plate members 74 and 78.

  For example, in the extended play and the member 74, it is sufficient to set the length of the lower plate 742 in the long side direction to L2 and the upper plate 741 to have a dimension corresponding to the extension allowance. However, this is not because the extension plate members 74, 76, 78, and 80 are used for the displacement restriction in the short side direction of the truss 20 by the stopper described below.

(Strengthening of fasteners)
As shown in FIG. 3, generally, fasteners that restrict displacement in the short side direction of the support portion, and thus the truss, are generally provided at both ends of the support portion 26 in the short side direction of the truss 20 (the stop piece 56. 58).

  In order to reinforce the above-mentioned regulation by the fasteners in response to the notification from the Ministry of Land, Infrastructure, Transport and Tourism, it is necessary to install fasteners that are stronger than the fasteners 56, 58, that is, usually larger. However, in the step-down portion 34 shown in FIG. 2A, there is only a narrow gap between the both ends of the support portion 26 and the side wall of the step-down portion 34 that is sufficient to provide the stoppers 56 and 58. Absent. Although the gap between the lower plates 742 and 762 of the extension plate members 74 and 76 and the side wall is slightly wider than the gap, it is difficult to install a large-sized stopper in such a narrow space. There is a case.

  Therefore, in the present embodiment, the fasteners 84 and 86 are installed between the extension portion 74A of the extension plate member 74 and the extension portion 76A of the extension plate member 76. By installing in such a position, there is no need to expand the installation space by extending the step-down portion 60 (FIG. 3) and the step-down portion 34 in the short side direction of the truss 20 in order to install the fasteners.

  For the fasteners 84 and 86, rectangular steel plates are used, and as shown in FIG. 2 (a), with one side faced to the side face of each of the lower plates 742 and 762 with a slight gap therebetween, The other three side surfaces are joined to the upper surface of the cradle 38 and the upper surface of the additional cradle 62 by fillet welding.

  When the extension portion 74A of the extension plate member 74 is about to be displaced in the direction in which the extension portion 76A of the extension plate member 76 exists, the side surface of the lower plate 742 constituting the extension portion 74A is the one side surface of the stopper metal 84. A further displacement is restricted. Further, when the extension portion 76A of the extension plate member 76 is about to be displaced in the direction in which the extension portion 74A of the extension plate member 74 exists, the side surface of the lower plate 762 that constitutes the extension portion 76A is the side of the stopper 86. Abutting on one side surface, further displacement is restricted. That is, the stopper 84 and the stopper 86 regulate the displacement of the extension portion 74A of the extension plate member 74 in the direction in which the extension portion 76A of the extension plate member 76 exists, and the extension plate member 76 extends. The portion 76A functions as a restricting means that restricts displacement of the extension plate member 74 in the direction in which the extension portion 74A exists, and thus restricts displacement of the support portion 26 in the short side direction of the truss 20.

  In this example, the extension parts 74A and 76A of the extension plate members 74 and 76 are formed by upper plates 741 and 761 (a part thereof) and lower plates 742 and 762 having a longer length in the short side direction of the truss 20 than this. Configured. The side surfaces of the lower plates 742 and 762 protruding from the upper plates 741 and 761 in plan view are brought into contact with the stoppers 84 and 86, respectively. The reason will be described with reference to the extension plate member 74 with reference to FIG.

  When the interlayer displacement in the short side direction occurs and the truss 20 is displaced in the short side direction, as described above, one side surface 742B of the lower plate 742 comes into contact with the stopper member 84, and the stopper member 84 is horizontal from the side surface 742B. Directional load H is received. The load H acts on the fastener 84 as a bending moment that is proportional to the height from the additional cradle 62 (height from the additional cradle 62 at the point of application of the load H) together with the shearing force. If the side surface 741B of the upper plate 741 is brought into contact with the stopper metal 84, the height of the point of application of the load H from the additional cradle 62 is increased, so that the bending moment acting on the metal stopper 84 is correspondingly increased. growing. As a result, it is necessary to improve the strength of the fastener, and as a result, the fastener may be increased in size. Therefore, in order to make the height of the acting point of the load H with respect to the stopper 84 from the additional receiving base 62 as low as possible, the side surface 742B of the lower plate 742 protrudes in the horizontal direction from the side surface 741B of the upper plate 741, The load H is surely applied to the stopper 84 at the side surface 742B.

  Returning to FIG. 2, a stopper 88 is installed in correspondence with the extension plate member 78, and a stopper 90 is installed in correspondence with the extension plate member 80, respectively. 86, the configuration, the installation position, and the installation mode are the same, and the description thereof is omitted.

  As described above, according to the escalator 10 according to the embodiment, the extension plate member 74 is provided at both end portions in the short side direction of the truss 20 of the support portion 26 provided at the upper end of the truss 20. 76, and the extension portions 74A, 76A between the extension portions 74A, 76A of the extension plate members 74, 76 extending from the support portion 26 to the opposite side of the truss 20 in the short side direction. The stoppers 84 and 86 are installed corresponding to 76A. As a result, the stepped-down portion 60 in which the support portion 26 and the like are accommodated in the old escalator is expanded in the long side direction of the truss 20 to provide the extension plate members 74 and 76, while the stoppers 84 and 86 There is no need to extend in the short side direction of the truss 20 for installation. In other words, the fasteners 84 and 86 can be installed without extending the stepped-down portion 60 in the short side direction of the truss 20. The same applies to the step-down portion 54 in which the support portion 32 and the like provided at the lower end of the truss 20 are accommodated.

  Further, the extension of the support portion 26 is extended by the extension portions 74A and 76A of the extension plate members 74 and 76. In this case, by providing the above-described contact avoidance regions 742A and 762A in the extending portions 74A and 76A, portions of the extending portions 74A and 76A that are not necessarily required to extend the allowance are not in contact with the upper surfaces of the shims 42 and 44. It becomes. Thereby, the reinforcement with respect to the supporting member 22 can be reduced as mentioned above. The same applies to the lower support member 28 provided at the lower end of the truss 20.

  Further, as is apparent from the above-described seismic reinforcement procedure, the seismic reinforcement can be performed without lifting the truss 20.

  As mentioned above, although the passenger conveyor based on this invention has been demonstrated based on embodiment, of course, this invention is not restricted to an above-described form, For example, it is good also as the following forms.

  (1) In the above-described embodiment, the extension plate members 74, 76, 78, and 80 are constituted by the upper plate 741, 761, 781, 801 and the lower plate 742, 762, 782, and 802, respectively. Alternatively, for example, a single steel plate may be cut to form an extension plate member having the same shape as the extension plate members 74, 76, 78, and 80.

  (2) In the above embodiment, for example, on the downstairs side, the restricting means is constituted by two fasteners 88 and 90 (FIG. 2 (c)). May be configured. For example, a rectangular steel plate having an overall length slightly shorter than the distance between the lower plate 782 and the lower plate 802 in the short side direction of the truss 20 is placed in a direction in which the length direction is the short side direction. It may be installed between the plates 802 (fixed to the cradle 40 and the additional cradle 64), and this may be used as a regulating means.

  When the upper floor is set in the non-fixed state similar to the lower floor as described later (4), the restricting means may be configured by a single steel plate as described above also on the upper floor.

  (3) In the above embodiment, rectangular steel plates are used for the fasteners 84, 86, 88, 90. However, the present invention is not limited to this, and for example, unequal side angle steel (L-shaped steel) may be used. For example, the long side portion of the unequal side angle steel is joined to the cradle 38 and the additional pedestal 62 by fillet welding, and the short side portion rising vertically from the cradle 30 and the additional pedestal 62 is connected to the lower plates 742 and 762. It faces the side.

  (4) In the above-described embodiment, the upper floor is in the semi-fixed state during the seismic reinforcement, but it is not necessarily required to be in the semi-fixed state, and may be in an unfixed state similar to the downstairs side.

  (5) In the above embodiment, the seismic reinforcement is changed from the one-end fixed state to the both-end non-fixed state. However, the present invention is not limited to this. It does not matter even if it has a structure with earthquake-proof reinforcement.

  (6) In the above embodiment, the upper plate constituting the extension plate members 74, 76, 78, 80 is joined to the corresponding support portion, the stoppers 84, 86, 88, 90 and the corresponding cradle and additional cradle. However, the present invention is not limited to this, and other joining means such as bolts may be used.

  (7) In the above embodiment, the passenger conveyor according to the present invention has been described by taking an escalator as an example. However, the passenger conveyor according to the present invention is an endless transport body composed of a plurality of pallets connected in a ring shape and an endless transport body composed of a rubber belt. The present invention can also be applied to a moving sidewalk in which a transport body is circulated and transports passengers and is inclined and moved.

  The passenger conveyor which concerns on this invention can be utilized suitably for the existing escalator with the request | requirement which aims at seismic strengthening, for example.

10 Escalator 20 Truss 26, 32 Bearing part 74, 76, 78, 80 Extension plate member 74A, 76A, 78A, 80A Extension part 84, 86, 88, 90

Claims (2)

A flat plate-like support portion provided at an end portion in the long side direction of the truss and extending horizontally in the long side direction is hung on a cradle laid at the bottom of the step-down portion that is one step lower than the building floor. A passenger conveyor having a configuration comprising:
A first extension plate member having a first extension portion fixed to the upper surface of the support portion so as to overlap a part thereof and extending from the support portion to the side opposite to the truss in the long side direction;
The first extension plate includes a second extension portion that is partly fixed to the upper surface of the support portion and that extends from the support portion to the side opposite to the truss in the long side direction. A second extension plate member provided at an interval in the short side direction of the member and the truss;
It is installed between the first extension part and the second extension part in the short side direction, and the first extension part is displaced toward the direction in which the second extension part exists. And a regulating means for regulating displacement of the second extending portion toward a direction in which the first extending portion exists ,
In the support portion, both end portions in the short side direction are respectively hung on the cradle through first and second height adjustment shims,
The first extension plate member is partially overlapped with an upper surface portion of the support portion above the first height adjustment shim, and the second extension plate member is the second height. The part is superimposed on the upper surface portion of the support portion above the adjustment shim,
The stepped portion is relatively displaced in the direction away from the truss in the long side direction, and the maximum distance assumed by an earthquake is relatively displaced, and each of the first and second height adjustment shims has a first view in plan view. In a state in which the one extension portion and the second extension portion overlap each other, only the partial regions near the truss on the top surfaces of the first and second height adjustment shims are respectively the first and second extension portions. An upward step is provided on the lower surface portions of the first and second extending portions that overlap with the remaining region in plan view so that the remaining region is in contact with the lower surface of the protruding portion. Characteristic passenger conveyor.   The restricting means includes a first stopper that restricts displacement of the first extending portion in a direction in which the second extending portion exists, and the second extending portion includes the first extending portion. The passenger conveyor according to claim 1, further comprising: a second stopper for restricting displacement in a direction in which the extending portion exists.

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