JP2012131580A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor that prevents a coupling part of a side frame body from being stretched out without increasing the plate thickness of the side frame body constituting a frame body and lowering workability.SOLUTION: In the passenger conveyor, right and left side frame bodies 2 (2A, 2B) constituting the frame body 1 are formed of a steel plate into a U-shaped cross-sectional shape; each coupling member is fixed to a coupler end of the side frame body so that coupling surfaces 3S, 13S face each other; coupling members facing each other are fixed by a coupling bolt 4 and a nut 5 along a longitudinal direction of the frame body; and also a bolt axis 4R of the coupling bolt is planarly overlapped relative to a centroid 10 of a part where a tensile stress of the side frame body acts on.

Description

  The present invention relates to an escalator in which a step is generated between adjacent treads in an inclined section, and a passenger conveyor including an electric road that is installed on a flat ground or an inclined land and does not generate a step between adjacent treads. The present invention relates to a passenger conveyor provided with a main frame in which a side frame is formed.

  A passenger conveyor in which left and right side frames constituting a main frame are formed by bending a steel plate into a U-shaped cross section has already been proposed, for example, as disclosed in Patent Document 1. Patent Document 2 also proposes a technique for forming a side frame body in a truss shape by pressing or bending a steel plate. In addition, as shown in Patent Document 3, there is also a technique for making a side frame using an H-shaped steel material.

  The main frame shown in each of the above-mentioned patent documents is divided in the longitudinal direction in consideration of production, transportation, and introduction into the installation site. Then, after the divided main frame is carried into the installation site, the divided portions are connected by connecting bolts or the like to be integrated.

  Then, the frame is bridged with respect to the distant support part, and houses and supports a plurality of treads and moving handrails that circulate and move inside the frame, and further, a driving machine and a guide member for driving them. .

Japanese Utility Model Publication No. 56-92658 JP-T-2004-528252 JP-A-52-137880

  The frame of the passenger conveyor shown in each patent document is subjected to a bending load with the support portion as a fulcrum by the weight of the frame itself, the weight of the storage equipment, and the passenger load. By this bending load, compressive stress acts on the upper side of the side frame constituting the frame, and tensile stress acts on the lower side.

  As shown in FIG. 9, the passenger conveyor frame shown in Patent Document 1 is formed by bending a steel plate into a U-shaped cross section to form a side plate 2 a and upper and lower sides (not shown) and a lower side 2 c above and below it. A frame 2 is formed, and the side frames 2A and 2B are formed by dividing the side frame 2 in the longitudinal direction. Then, the connecting members 9A and 9B are fixed to the end portions of the divided side frames 2A and 2B, respectively, and the connecting members 9A and 9B are fastened by the connecting bolt 4 and the nut 5 along the longitudinal direction of the side frame 2. Are connected.

  As described above, when the connecting members 9A and 9B are fastened by the connecting bolt 4 and the nut 5 along the longitudinal direction of the side frame body 2, tensile stress acts on the lower side portion 2c side. Works. However, since the bolt shaft 4R of the connecting bolt 4 is displaced with respect to the centroid 10 of the side frame 2 where the tensile stress acts, when the tensile stress acts along the centroid, as shown in FIG. Further, the connecting members 9A and 9B and the side frames 2A and 2B integrated with the connecting members 9A and 9B are expanded and deformed by a bending moment using the connecting bolt 4 and the fastening portion of the nut as a fulcrum. Therefore, the mechanical strength has to be improved so that the side frame body 2 and the connecting members 9A and 9B can withstand these, resulting in an increase in the weight of the frame body and a decrease in the assembly workability of the frame body.

  Moreover, since the frame of the passenger conveyor shown in patent document 2 is arrange | positioned orthogonally to the tensile stress which the bolt axis | shaft of the connection bolt which connects a division | segmentation part generate | occur | produces, a bolt axis | shaft will receive a shear stress. Therefore, the bolt holes in the connecting portion must be precisely machined, and the connecting bolts must be carefully inserted into the bolt holes, so that there is a problem of reducing workability at the installation site.

  Furthermore, since the frame of the passenger conveyor shown in Patent Document 3 is formed of an H-shaped steel material, the weight of the frame body is increased, and in order to connect the H-shaped steel material, which is a heavy object, both sides of the vertical plate material. In addition, a large number of connecting bolts must be used for connection, and there is a problem that a great amount of labor and time is spent on the assembly at the installation site to reduce workability.

  The objective of this invention is providing the passenger conveyor which can suppress the breadth of the connection part of a side frame, without making plate | board thickness of the side frame which comprises a frame thick, and reducing workability | operativity.

  In order to achieve the above-mentioned object, the present invention forms the left and right side frames constituting the frame with a steel plate in a U-shaped cross section, and the connecting member so that the connecting surface faces the connecting portion end of the side frame. And fastening the opposing connecting members with connecting bolts and nuts along the longitudinal direction of the frame body, and the bolt shaft of the connecting bolt with respect to the centroid of the portion where the tensile stress of the side frame body acts They were stacked in a plane.

  With the above configuration, the bolt axis of the connecting bolt overlaps the centroid of the portion where the tensile stress of the side frame acts on the plane, so even if the tensile stress acts on the side frame, the figure due to the tensile stress The bending moment caused by the displacement of the center and the bolt shaft can be suppressed. As a result, it is not necessary to improve the mechanical strength of the side frame and the connecting member, which increases the weight of the frame and the assembly workability of the frame. The decrease can be eliminated.

  In addition, since the connecting bolt is arranged in the direction in which the tensile stress acts, no shear stress is applied to the connecting bolt, and as a result, precise machining of the bolt hole in the connecting portion is not required. Therefore, it is easy to insert the bolt into the bolt hole, and the workability at the installation site is improved.

  In addition, since the bent steel plate is used instead of the heavy H-shaped steel as the side frame constituting the frame, the weight of the frame is not increased, and the heavy H-shaped steel is used. Therefore, it is not necessary to connect a large number of connecting bolts on both sides of the vertical plate material. Therefore, it takes a lot of labor and time to assemble at the installation site and eliminates the problem of reducing workability. can do.

The partially expanded side view which shows 1st Embodiment of the connection part of the side frame of a passenger conveyor by this invention. The top view of FIG. The side view which shows the whole frame of the passenger conveyor which has a connection part of FIG. The equivalent figure of FIG. 1 which shows 2nd Embodiment of the connection part of the side frame of a passenger conveyor by this invention. The top view of FIG. The equivalent figure of FIG. 1 which shows 3rd Embodiment of the connection part of the side frame of a passenger conveyor by this invention. The top view of FIG. The equivalent figure of FIG. 1 which shows 4th Embodiment of the connection part of the side frame of a passenger conveyor by this invention. The equivalent figure of FIG. 2 which shows the connection part of the side frame of the conventional passenger conveyor. The top view which shows the deformation | transformation state of FIG.

  Hereinafter, a first embodiment of a connecting portion of a frame of a passenger conveyor according to the present invention will be described with reference to FIGS.

  A passenger conveyor, for example, an escalator frame 1 has a substantially U-shaped cross section formed by connecting a pair of left and right side frames 2 with a cross beam or a bottom member (not shown). The left and right side frames 2 are formed by bending a steel plate into a U-shaped cross section, and include a side plate 2a that is a vertical member, and an upper side 2b and a lower side 2c that are bent substantially vertically at the upper and lower sides. Have.

  The side frame body 2 formed in this way is divided into side frame bodies 2A and 2B in the longitudinal direction so as to be easy to handle, and connecting plates 3A and 3B, which are connecting members, are connected to the divided end portions, respectively. It is fixed directly by well-known means such as welding. Of course, the connecting surfaces 3S of the connecting plates 3A and 3B facing each other are fixed so as to be parallel.

  And the bolt hole is provided along the longitudinal direction of the side frame 2 through the connection surface 3S of these connection plates 3A and 3B, and the bolt shaft 4R of the connection bolt 4 is penetrated through this bolt hole. A nut 5 is screwed into the penetrating end of the shaft 4R and fastened. Needless to say, these connecting bolts 4 and nuts 5 are installed within the width of the lower side 2c, in other words, within the widths of the side frames 2A and 2B, as shown in FIG.

  What is important here is that the bolt shaft 4R of the connecting bolt 4 located on the side of the lower side 2c where the tensile stress acts on the side frame 2 is flat with the centroid 10 of the portion of the side frame 2 where the tensile stress acts. Preferably, they are arranged so that the axis of the bolt shaft 4R of the connecting bolt 4 coincides with the centroid 10 in a plane. More desirably, the connecting bolt 4 is arranged so that the axial center of the bolt shaft 4R is close to the lower side 2c of the side frame 2 so as to coincide with the centroid 10 in a plane.

  In the above configuration, when bending acts on the side frame 2, tensile stress due to bending acts on the lower side portion 2 c of the side frame 2 along the centroid 10. However, since the bolt shaft 4R of the connecting bolt 4 coincides with the centroid 10 in a plane, no bending moment is generated with the bolt connecting portion as a fulcrum, and therefore the side frame 2A including the connecting plates 3A and 3B. , 2B does not generate a force to expand the end portion, and the deformation at the connecting portion of the side frame 2 is eliminated. Furthermore, since the bolt shaft 4R of the connecting bolt 4 is close to the lower side 2c of the side frame 2, when the side frame 2 is bent, the connecting plates 3A and 3B as shown by the arrows in FIG. It is possible to efficiently suppress the force to expand the lower end of the.

  Therefore, according to the present embodiment, it is possible to withstand bending without increasing the plate thickness of the side frame 2, and as a result, it is not necessary to increase the weight of the frame 1. Assembly workability can be improved. Further, since the connecting bolt 4 is arranged in the direction in which the tensile stress acts, no shear stress is applied to the connecting bolt 4, so that precise machining of the bolt holes in the connecting plates 3 </ b> A and 3 </ b> B becomes unnecessary, and the connecting bolt 4 is connected. The bolt 4 can be easily inserted into the bolt hole, and the workability at the installation site is improved. In addition, since it can withstand bending without using a heavy H-shaped steel material as the side frame 2 constituting the frame 1, the weight of the frame 1 is not increased. Compared to connecting the H-shaped steel material, it is possible to reduce the number of connection bolts 4 or to use a connection bolt having a small bolt shaft diameter.

  By the way, in the said embodiment, when the centroid 10 is located quite close to the side plate 2a as shown in FIG. 2 in plan view, the connecting bolt 4 and the nut 5 interfere with the side plate 2a. Therefore, there is a possibility that the connecting plates 3A and 3B cannot be fastened.

  In such a case, the connection work can be facilitated by opening the work window 6 in a portion of the side plate 2a facing the connection bolt 4 and the nut 5.

  In the above-described embodiment, the axis of the bolt shaft 4R of the connecting bolt 4 is made to coincide with the centroid 10 in plan view, but it is not always necessary to coincide, and an effect is expected as compared with the conventional case. If possible, the axial center of the bolt shaft 4R of the connecting bolt 4 may be slightly shifted from the centroid 10 in a plan view. However, if the axial center of the bolt shaft 4R of the connecting bolt 4 and the centroid 10 are shifted too much, the effect is reduced. Therefore, if the bolt shaft 4R of the connecting bolt 4 overlaps the centroid 10 in a plan view. Good. As a result, the bolt shaft 4R of the connecting bolt 4 becomes very close to the centroid 10, so that the bending moment with the bolt connecting portion as a fulcrum becomes small. Therefore, the side frames 2A and 2B including the connecting plates 3A and 3B A force for expanding the end portion is not generated so much and deformation at the connecting portion of the side frame body 2 can be suppressed.

  Further, although depending on the size of the connecting bolt 4 and the nut 5, as shown in FIG. 2, when the head of the connecting bolt 4 and a part of the nut 5 are arranged in the work window 6 and viewed in the axial direction. Further, the head of the connecting bolt 4 and the nut 5 are planarly overlapped with the side plate 2a of the side frame 2, in other words, the axial projection surface of the connecting bolt 4 is overlapped with the side plate 2a. With such a configuration, even when the centroid 10 is very close to the side plate 2a, the bolt shaft 4R of the connecting bolt 4 can be overlapped with the centroid 10 in a plane.

  Next, 2nd Embodiment of the connection part of the frame of a passenger conveyor by this invention is described using FIG.4 and FIG.5. 1 to 3 indicate the same structure, and detailed description thereof is omitted.

  In the first embodiment, the connection plates 3A and 3B are attached over the entire ends of the side frames 2A and 2B, and the work window 6 is provided at the ends of the side frames 2A and 2B. However, in the second embodiment, the coupling tools 11A and 11B provided with the work window 6 are standardized so that the side frames 2A and 2B are not subjected to large processing.

  In other words, in the second embodiment, the couplers 11A and 11B, which are coupling members, include a lower side portion 12c that is in surface contact with the lower side portion 2c of the side frames 2A and 2B by bending a steel plate into an L shape, and the side frame. A side plate 12a that is in surface contact with the side plates 2a of 2A and 2B is formed, and connecting plates 13A and 13B are fixed to end portions of the side plate 12a and the lower side portion 12c by known means. . In addition, a working window 6 that faces the connecting bolt 4 and the nut 5 is formed on the side close to the lower side portion 12c of the side plate 12a and the connecting plates 13A and 13B.

  Then, the side plates 12a and the lower side portions 12c of the couplers 11A and 11B thus configured are fixed to the side plates 2a and the lower side portions 12c at the end portions of the side frames 2A and 2B by known means. ing. At this time, the coupling tools 11A and 11B are fixed to the end portions of the side frames 2A and 2B so that the coupling surfaces 13S of the adjacent coupling plates 13A and 13B are parallel to each other.

  Of course, the connection surface 13S of the connection plates 13A and 13B is provided with bolt holes through the bolt shaft 4R of the connection bolt 4 along the longitudinal direction of the side frames 2A and 2B. As in the first embodiment, the four bolt shafts 4R are penetrated, the nuts 5 are screwed into the penetrating ends of the bolt shafts 4R, and the couplers 11A and 11B are fastened together. Further, the bolt shaft 4R of the connecting bolt 4 that penetrates overlaps the centroid 10 of the portion on which the tensile stress of the side frame 2 (2A, 2B) acts, preferably, the bolt shaft 4R of the connecting bolt 4 Arrangement is made so that the axial center coincides with the centroid 10 in a plan view, and more desirably, at the position where the axial center of the bolt shaft 4R of the connecting bolt 4 is close to the lower side portion 2c of the side frame 2. It is the same as that of the first embodiment that it is arranged so as to coincide with the plane. In addition, the head of the connecting bolt 4 and a part of the nut 5 can be disposed in the work window 6 so that the axial projection surface of the connecting bolt 4 can overlap the side plate 2a. The form is the same.

  In the above description, only the couplers 11A and 11B at the end on the lower side 12c side of the side frame 2 (2A, 2B) on which tensile stress acts have been explained, but the upper side on which compressive stress (not shown) acts. Also in the end portion, a coupler having the same configuration as the couplers 11A and 11B may be used, or another coupler that can withstand compressive stress may be used.

  Since it comprised in this way, while being able to perform the same connection operation | work as 1st Embodiment also in 2nd Embodiment, there can exist the same effect as 1st Embodiment. In addition, the following effects can be achieved in the present embodiment.

  That is, in the first embodiment, the connecting plates 3A and 3B, which are connecting members, are fixed to the side frames 2A and 2B by well-known means such as welding. The steel plate constituting 2B may be deformed by welding thermal strain, and the straightness of the side frames 2A and 2B at the connecting portion may be out of order, which may require correction work. However, in the second embodiment, the couplers 11A and 11B having the coupling plates 13A and 13B are prepared in advance, and are fixed to the end portions of the side frames 2A and 2B, such as bolts and nuts. Due to the configuration of attaching by means, deformation due to thermal strain of the side frames 2A and 2B is suppressed, and work for correcting the deformation due to welding thermal strain can be reduced.

  6 and 7 show a third embodiment of the connecting portion of the frame of the passenger conveyor according to the present invention, and the basic configuration is the same as that of the second embodiment shown in FIGS. is there. Therefore, the same reference numerals as those in FIG. 4 and FIG.

  In the third embodiment, the configuration different from the second embodiment is the configuration of the couplers 14A and 14B that are coupling members. That is, the couplers 14A and 14B in the present embodiment have two side plates 12a1 and 12a2 and lower side portions 12c1 and 12c2, respectively. The side plates 12a1 and 12a2 and the lower side portions 12c1 and 12c2 are side frame bodies. The side surface plate 2a and the lower side 2c of 2A and 2B are configured to come into surface contact from both sides.

  By connecting the side frames 2A and 2B using the connectors 14A and 14B configured as described above, the same effects as those of the respective embodiments are always obtained, and the tensile stress of the side frame 2 (2A and 2B) is increased. Since the shift of the centroids (not shown) of the couplers 14A and 14B with respect to the centroid 10 of the acting part can be minimized, the bending moment due to the shift of the centroid is suppressed, and the side frame 2 can be efficiently manufactured. (2A, 2B) can be prevented from spreading the connecting portion. Further, by adjusting the width dimension (vertical direction dimension in FIG. 7) of the lower side portions 12c1 and 12c2 of the couplers 14A and 14B to reduce the displacement of the centroid as much as possible, the fatigue strength of the couplers 14A and 14B is reduced. The weights of the connectors 14A and 14B may be reduced.

  FIG. 8 shows a fourth embodiment of a connecting portion of a frame of a passenger conveyor according to the present invention, and the basic configuration is the same as that of the second embodiment shown in FIGS. Therefore, the same reference numerals as those in FIG. 4 and FIG.

  In the fourth embodiment, the configuration different from the second embodiment is the configuration of the couplers 15A and 15B that are coupling members. That is, the connecting tools 15A and 15B in the present embodiment are such that the connecting plates 13A and 13B extend vertically and protrude below the lower side 2c of the side frames 2A and 2B and also protrude upward. The connecting bolts 4 are also passed through the extending portions of the connecting plates 13A and 13B extending below the lower side portions 2c of the side frames 2A and 2B, respectively, and fastened with nuts 5.

  By comprising in this way, it becomes possible to suppress efficiently the opening of connector 15A, 15B by the tensile stress which acts by the bending which acts on the lower part of the side frame 2 (2A, 2B). Furthermore, the diameter of each connecting bolt 4 can be reduced by using a plurality of connecting bolts 4.

  Each of the above embodiments has described the escalator frame installed in the inclined section as the passenger conveyor frame, but it can also be applied to the frame of the electric road installed in the inclined section or flat ground. Nor.

  DESCRIPTION OF SYMBOLS 1 ... Frame body, 2 (2A, 2B) ... Side frame body, 2aa, 12a, 12a1, 12a2 ... Side frame body, 2b ... Upper side part, 2c, 12c, 12c1, 12c2 ... Lower side part, 3A, 3B, 13A, 13B ... Connecting plate, 3S, 13S ... Connecting surface, 4 ... Connecting bolt, 4R ... Bolt shaft, 5 ... Nut, 6, 6A, 6B ... Work window, 10 ... centroid, 11A, 11B, 14A, 14B, 15A, 15B ... Connecting tool.

Claims (10)

  The left and right side frames constituting the frame are formed into a U-shaped cross section having side plates that are vertical members made of steel plates and upper and lower sides formed by bending the upper and lower sides of the side plates. Each of the connecting members is fixed so that the connecting surface faces the end of the connecting portion, and the opposing connecting member is fastened with a connecting bolt and a nut along the longitudinal direction of the frame body, and the bolt shaft of the connecting bolt is A passenger conveyor characterized in that it is overlapped in a plane with respect to the centroid of the side frame body where the tensile stress acts.   2. The passenger conveyor according to claim 1, wherein an axial projection surface of the connecting bolt overlaps the side plate of the side frame.   3. The bolt according to claim 1, wherein a bolt shaft of the connecting bolt is overlapped in a plane with respect to a centroid of a portion on which the tensile stress of the side frame acts at a position close to the lower side portion. Passenger conveyor.   The passenger conveyor according to any one of claims 1 to 3, wherein the connection surface is formed on a connection plate that is directly fixed to an end of the side frame.   The passenger conveyor according to claim 4, wherein a work window facing the connection bolt and the nut is opened in the side plate.   The passenger conveyor according to any one of claims 1 to 3, wherein the connecting surface is formed on a connecting plate provided on a connecting member fixed directly to an end of the side frame.   The passenger conveyor according to claim 6, wherein a work window facing the connection bolt and the nut is opened in the connection member.   The passenger according to claim 6 or 7, wherein the connecting plate extends below the lower side, and the connecting plate extended downward is connected by a connecting bolt and a nut. Conveyor.   The passenger conveyor according to any one of claims 1 to 89, wherein the connection bolt and the nut are installed within a width of the side frame.   The passenger according to any one of claims 1 to 9, wherein the axial center of the bolt shaft of the connecting bolt is planarly matched with the centroid of the portion on which the tensile stress of the side frame acts. Conveyor.

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