JP2011173696A - Main frame of passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce or avoid the occurrence of a high stress part and local deformation in a face plate, in a main frame of a passenger conveyor constituted of the face plate. <P>SOLUTION: This main frame of the passenger conveyor is provided for installing a side surface plate 10 of the passenger conveyor constituted of the face plate of a plate thickness t1 in a building via a receiving beam 101 of a plate thickness t3. In this case, a load transmission member 501 having a plane 501B turning in at least the main frame width direction, a plane 501A turning in the main frame longitudinal direction and a plane 501C turning in the vertical direction, is constituted by using a member of a plate thickness t2 existing in the relationship of t1<t2<t3, and the side surface plate 10 and the receiving beam 101 are connected by using this load transmission member 501, to thereby reduce or avoid the occurrence of the high stress part to the side surface plate 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to passenger conveyors such as escalators and electric roads, and more particularly to the configuration of the main frame thereof.

  The main frame of a passenger conveyor is comprised from the intermediate | middle inclination part inclined with respect to the horizontal direction, the upper horizontal part with which the inclination upper side was equipped, and the lower horizontal part with which the inclination lower side was equipped. A receiving beam is installed at each end of the upper horizontal part and the lower horizontal part, and the passenger conveyor can be installed on the building by installing the receiving beam on the beam of the building. This receiving generally has high rigidity to support the weight of the passenger conveyor and the load of the passenger.

  Conventionally, in the main frame of a passenger conveyor, a structure mainly composed of a face plate has been proposed in order to improve the manufacturability by reducing the weight and welding work. Patent Document 1 discloses a main frame structure of a passenger conveyor having a structure mainly composed of a face plate, and shows a structure in which the face plate and the receiving beam are directly connected.

Japanese Utility Model Publication No. 54-153694

  In the main frame of the passenger conveyor constituted by the face plate, a steel plate having the thinnest possible thickness is used for the face plate to reduce the weight. On the other hand, the receiver that supports the weight of the passenger conveyor and the passenger load has the minimum rigidity required to support it. In order to ensure the rigidity, it is necessary to increase the thickness of the receiving plate to some extent. For this reason, it is necessary to connect a member having a large rigidity difference between the face plate and the receiving beam. However, due to the low rigidity of the face plate itself and the large difference between the rigidity of the receiving plate and the face plate, high stress and local large deformation are likely to occur in the face plate having low rigidity at these connecting portions.

  The present invention has been made in view of such a conventional technique. The object of the present invention is to provide a high-stress portion or local deformation of a face plate in a connection portion between a highly rigid receiving and a less rigid face plate. It is an object of the present invention to provide a main frame of a passenger conveyor that can reduce or avoid occurrence, is lightweight, and is easy to install.

  In order to achieve the above object, a feature of the present invention is that a passenger conveyor includes a side plate constituted by a face plate having a thickness t1, and is constructed on a beam of a building via a receiving beam constituted by a member having a thickness t3. In the main frame, a member having a thickness t2 having a relationship of t1 <t2 <t3, at least a surface facing the width direction of the main frame, a surface facing the longitudinal direction of the main frame, and a surface facing the vertical direction A load conveyor member is provided, and the side plate and the receiving beam are connected to each other via the load transmission member, so that a passenger conveyor is installed in the building.

  By installing a load transmitting member that has a rigidity between the high rigidity beam and the low rigidity face plate and that can be connected to the face plate in a wide range, high stress in the face plate It is possible to reduce or avoid the occurrence of local deformation and local deformation, and to realize a main frame of a passenger conveyor that is lightweight and easy to install.

Side surface sectional drawing of the main frame of the passenger conveyor which concerns on one Example of this invention. Side sectional view of the vicinity of the upper beam in FIG. FIG. 1 is a perspective view of the vicinity of the upper beam in FIG. Side sectional view in the vicinity of the upper beam corresponding to a comparative example with the present invention FIG. 4 is a perspective view of the vicinity of the upper beam in FIG. Explanatory drawing of the stress which acts on the main frame and upper receiving vicinity of FIG. Diagram showing the simulation result of the relationship between plate thickness and stress Side surface sectional drawing of the upper receiving vicinity vicinity in the other Example of this invention FIG. 8 is a perspective view of the vicinity of the upper beam in FIG.

  Embodiments of the present invention will now be described with reference to the illustrated examples. In addition, in these Examples, although the objective other than the above-mentioned objective and characteristic of this invention are also disclosed, those objectives and characteristics are demonstrated in an Example. For example, the load transmission member that constitutes the main feature of the present invention is not limited to a single member, and may be composed of a plurality of members as described in an example in Example 2 described later. It can be applied and modified as appropriate.

  FIG. 1 shows a side sectional view of a main frame of a passenger conveyor according to one embodiment of the present invention. As a coordinate system, the main frame longitudinal direction, main frame width direction, and vertical direction are defined as shown in FIG. The main frame of the passenger conveyor is provided with a pair of side plates 10 on the left and right sides having a U-shaped cross-sectional shape by bending an end of a steel plate having a plate thickness t1 into an L shape. Furthermore, an intermediate inclined part 300 inclined with respect to the horizontal, an upper horizontal part 100 installed on the upper side, and a lower horizontal part 200 installed on the lower side are provided.

  At the end portions of the upper horizontal portion 100 and the lower horizontal portion 200, an upper beam 101 and a lower beam 102 are provided for installing the main frame on the building. The upper beam 101 and the lower beam 102 have an L-shaped cross-sectional shape with a thickness of t3. One surface is installed on the building upper floor beam 401 or the building lower floor beam 402, and the other surface is the main surface. Fixed to the frame. Thereby, the main frame is constructed in the building.

  The main frame of the present embodiment includes a load transmission member 501 at a connection portion between the upper horizontal portion 100 and the upper beam 101, and a load transmission member 502 at a connection portion between the lower horizontal portion 200 and the lower beam 102. .

  Next, the structure of the connecting portion between the receiving beam and the main frame will be described with a focus on the vicinity of the upper receiving beam 101, but the same structure can be applied to the connecting portion between the lower receiving beam 102 and the main frame. FIG. 2 is a side sectional view in the vicinity of the upper beam 101, and FIG. 3 is a perspective view thereof.

  The side plate 10 includes a top surface 10A on the positive side in the vertical direction, a bottom surface 10C on the negative side in the vertical direction, and a side surface 10B on the end side in the main frame width direction. The load transmission member 501 includes a surface 501A facing the main frame longitudinal direction, a surface 501B facing the main frame width direction, and a surface 501C facing the vertical direction. The surface 501A is connected and fixed to the upper beam 101, the surface 501B is connected to the side surface 10B of the side plate 10, and the surface 501C is connected and fixed to the top surface 10A of the side plate 10 by bolt fastening or welding so that each can transmit force. It is configured.

  Further, the top surface 10A of the side plate 10 and the upper receiving beam 101 are not directly connected and have a certain distance or more, and the side plate 10 and the upper receiving beam 101 and the lower receiving beam 102 are directly exchanged. It is configured not to occur.

  In this embodiment, the surface 501A and the surface 501C of the load transmission member 501 are continuous via an R portion having a curvature. Similarly, the surface 501A and the surface 501B are continuous through an R portion having a curvature. In this embodiment, the boundary between the surface 501B and the surface 501C is divided, but it can also be realized with a continuous structure.

  In contrast to the present embodiment, the present invention can be implemented even when the surface 501A and the surface 501C are discontinuous and the surface 501B and the surface 501C are continuous. Furthermore, the present invention can be applied to a continuous structure without the R portion. However, in order to avoid stress concentration, it is desirable to be continuous through the R portion. In order to reduce the number of parts and the number of man-hours, it is preferable to produce a load transmission member by bending an integral member. In this case, it is better to form an R portion in the bent portion.

  Next, the effect | action of the load transmission member in a present Example is demonstrated in detail compared with a comparative example. Although the structure near the upper receiving beam will be described here, the same structure can be applied to the vicinity of the lower receiving beam.

  In order to reduce the weight of the main frame, the thickness t1 of the side plate 10 is made as small as possible, but the upper beam 101 needs to support the weight of the passenger conveyor and the passenger load, so it needs a minimum rigidity, It is difficult to reduce the plate thickness t3. Accordingly, the difference between the plate thickness t1 and the plate thickness t3 is inevitably increased, and the difference in rigidity between the side plate 10 and the upper receiving beam 101 is increased.

  4 is a side sectional view of a comparative example, and FIG. 5 is a perspective view thereof.

  As shown in FIG. 4, this comparative example shows an example in which a vertical member 505 having an L-shaped cross section is provided in the vicinity of the main frame and the receiving beam. Then, the end portion 600 of the top surface 10A, the end portion of the L-shaped vertical member 505, and the upper receiving beam 101 are connected by welding.

  FIG. 6 shows a state of deflection deformation due to the weight of the passenger conveyor and the passenger load in the vicinity of the upper receiving beam 101. As shown in FIG. 6, the main frame undergoes a bending deformation in the vertical direction due to its own weight or a passenger load. As a result, a compressive load is generated on the top surface 10A side and a tensile load is generated on the bottom surface 10C side. At this time, the load of the compressive load particularly on the top surface 10A that is away from the neutral axis increases. Therefore, when the conventional structure is applied to the main frame mainly composed of the face plate, high compressive stress may occur in the vicinity of the end portion 600 of the top face 10A of the side face plate 10 having low rigidity.

  FIG. 7 shows the result of simulating the relationship between the compressive stress in the vicinity of the end portion 600 of the top surface 10A and t3 / t1 representing the relationship between the thickness of the upper receiving beam 101 and the side plate 10. According to the verification by the present inventors, as shown in FIG. 7, the compressive stress in the vicinity of the end portion 600 of the top surface 10A increases as the difference in plate thickness between the side plate 10 and the upper receiving beam 101 increases. In particular, when the relationship between the plate thickness t1 and the plate thickness t3 is t3 / t1 ≧ 2.5, an excessive force is applied to the top surface 10A of the side plate 10 with low rigidity, and local areas such as high stress portions and buckling are applied. It has been found that there is a risk of causing general deformation.

  On the other hand, as shown in FIGS. 1 to 3, the main frame in the present embodiment includes a load transmission member 501 between the side plate 10 of the main frame and the upper receiving beam 101. The plate thickness of the load transmission member 501 is approximately t2, and is configured to satisfy t1 <t2 <t3. According to the verification by the present inventors, when t2 <t1, the load transmission member 501 and the upper receiving beam 101 have a large difference in rigidity, which may cause a high stress portion or large deformation in the load transmission member 501. In particular, it has been found that the surface 501C undergoes buckling deformation due to the compressive load, and accordingly, the top surface A of the side plate 10 may also cause high stress portions and buckling deformation.

  In addition, when t2> t3, the rigidity difference between the load transmission member 501 and the side plate 10 becomes large, so that the top surface 10A in the vicinity of the end portion 700 (see FIG. 2) of the load transmission member 501 that is the connection portion thereof. It was found that there is a risk of high stress areas and large local deformation.

  Furthermore, even in the main frame provided with the load transmission member 501, when the upper receiving beam 101 and the side plate 10 are directly connected, force exchange occurs between the two, and the side plate 10 having low rigidity is used. , It was found that high stress is likely to occur particularly near the edge 600 of the top surface 10A.

  From the above, when the side plate 10 and the upper beam 101 are not directly connected but connected via the load transmission member 501 having a thickness t2 that satisfies the relationship of t1 <t2 <t3, the load transmission member 501 has a structure that is not too rigid with respect to the side plate 10 and is not too low with respect to the receiving beam, and the difference in rigidity of each member can be reduced at the connection between the upper receiving beam 101 and the main frame. Yes, you can smooth the exchange of power.

  Also, as shown in FIGS. 1 to 3, in the main frame in the present embodiment, the load transmission member 501 is connected to the side plate 10 via the surface 501B and the surface 501C. The side surface 10B and the top surface 10A are connected over a wide range, and are configured so that the force from the upper receiving beam 101 can be distributed to the side plate 10 in a distributed manner. Thereby, it is possible to suppress the occurrence of buckling deformation and high stress. Furthermore, in this embodiment, the surface 501A and the surface 501C of the load transmission member 501 are continuous via the R portion having a curvature, so that the stress concentration can be further relaxed.

  In this embodiment, the load transmitting members 501 are all the same plate thickness t2, but this is not a limitation. Even if the plate thickness is different on each surface of the load transmission member 501, the load transmission member 501 only needs to have an intermediate plate thickness between the plate thickness t1 of the side plate 10 and the plate thickness t3 of the upper receiving beam 101.

  As described above, in this embodiment, the main frame has load transmission members 501 and 502 each having an end portion facing the main frame width direction, a main frame longitudinal direction surface, and a vertical direction surface. (Fig. 1), the side plate 10 and the upper receiving beam 101 and the lower receiving beam 102 are not connected directly, but are connected via the load transmitting members 501 and 502 to avoid a sudden change in rigidity, Can be distributed in a distributed manner. Thereby, the main frame of the passenger conveyor which does not produce a high stress part and local deformation | transformation in the connection part of a receiving beam and a main frame is realizable.

  Another embodiment of the present invention will be described. The present embodiment is an example in which the load transmission member is composed of a plurality of members. FIG. 8 is a side sectional view in the vicinity of the receiving beam, and FIG. 9 is a perspective view in the vicinity of the receiving beam.

  As shown in FIGS. 8 and 9, in this embodiment, two types of load transmission members 503 and 504 are provided. The load transmission member 503 is formed of a member having a plate thickness t21 and a cross section having an L shape, and includes a surface facing the longitudinal direction of the main frame and a surface facing the vertical direction. Further, the load transmission member 504 is formed of a member having a plate thickness t22 and an L-shaped cross section, and includes a surface facing the main frame width direction and a surface facing the main frame longitudinal direction.

  The load transmission member 503 has a surface facing the longitudinal direction of the main frame connected to a surface facing the longitudinal direction of the main frame of the load transmission member 504 by bolts or welding, and a surface facing the vertical direction of the load transmission member 503 is a side plate. Connected to 10 top surfaces 10A with bolts or welding. The load transmitting member 504 has a surface facing the longitudinal direction of the main frame connected to the upper receiver 101 by bolts or welding, and a surface facing the width direction of the main frame of the load transmitting member 504 is connected to the side surface 10B of the side plate 10 and the bolts. Connected by welding. Further, the side plate 10 and the upper receiving beam 101 are not directly connected, and have a certain interval or more.

  As described in the first embodiment, force exchange can be smoothed by reducing the difference in rigidity of the connected members. Therefore, also in the present embodiment, the relationship between the plate thicknesses is configured to satisfy t1 <t21 <t3 and t1 <t22 <t3. Furthermore, since t1 <t3, the plate thickness t21 of the load transmission member 503 connected to the side plate 10 is configured to be thinner than the plate thickness t22 of the load transmission member 504 connected to the upper receiving beam 101. Therefore, it is configured to satisfy t1 <t21 ≦ t22 <t3.

  With the above structure, as in the first embodiment, the difference in rigidity between the side plate, the load transmission member, and the receiving beam can be reduced, and the force exchange between the members can be made smooth.

  In addition, as in this embodiment, the load transmission member is made up of two types of members having simple shapes, so that the member can be easily manufactured. In addition, since a simple angle member can be used, the load transmission member can be formed of a standardized member, and the cost can be reduced.

  In this embodiment, the upper receiving beam 101 side has been described, but the same can be applied to the lower receiving beam 102 side.

  Further, in the first and second embodiments, the case where the both sides are not directly connected by having a gap between the side plate 10 and the receiving beam 101 has been described. Even if there is no gap in the side plate, the effect is reduced by using the load transmission member as described in the first and second embodiments compared to the case where there is a gap, but the side plate 10 can disperse and relieve the stress received from the receiving beam 101, and the thickness of the side plate 10 where it is connected to the load transmission member is substantially increased, so resistance to stress Since the effect of the present invention can be obtained in the same manner, a configuration in which there is no gap and a direct connection may be employed.

10 ... Side plate
10A ・ ・ ・ Top of side plate
10B: Side of side plate
10C: Bottom of side plate
100 ・ ・ ・ Upper horizontal part
200 ・ ・ ・ Lower horizontal part
300 ・ ・ ・ Inclined part
101 ・ ・ ・ Upper receiving
102 ・ ・ ・ Lower receiving
401 ・ ・ ・ Building upper floor beam
402 ... Building lower floor beam
501, 502, 503, 504 ... Load transmission member
505 ・ ・ ・ Vertical material
501A: Face of the load transmission member facing the longitudinal direction of the main frame
501B: Face of the load transmission member facing the main frame width direction
501C ・ ・ ・ Surface facing the vertical direction of the load transmission member
600 ・ ・ ・ End of side plate top
700 ・ ・ ・ End of load transmission member
t1 ・ ・ ・ Thickness of side plate,
t2, t21, t25 ... thickness of load transmitting member,
t3 ... Thickness of the receiving plate

Claims (6)

  In the main frame of the passenger conveyor, which has a side plate composed of a face plate with a thickness of t1, and is built on a beam of a building via a receiving beam composed of a member with a thickness of t3, the relationship of t1 <t2 <t3 A load transmission member comprising at least a surface facing the width direction of the main frame, a surface facing the longitudinal direction of the main frame, and a surface facing the vertical direction. A main frame of a passenger conveyor, wherein a beam is connected via the load transmission member.   2. The main frame of the passenger conveyor according to claim 1, wherein the side plate includes a top surface on the positive side in the vertical direction, a bottom surface on the negative side in the vertical direction, and a side surface on the end side in the main frame width direction. Connecting the top surface of the face plate and the surface of the load transmission member facing the vertical direction, connecting the side surface of the side plate and the surface of the load transmission member facing the main frame width direction, and transmitting the load A main frame of a passenger conveyor, wherein a surface of the member facing the longitudinal direction of the main frame is connected to the receiving beam.   The main frame of the passenger conveyor according to claim 1 or 2, wherein a surface facing the longitudinal direction of the main frame and a surface facing the vertical direction in the load transmission member are connected via an R portion having a curvature. The main frame of the passenger conveyor characterized by being.   The main frame of the passenger conveyor according to claim 1 or 2, wherein a gap is formed between the side plate and the receiving beam and connected by the load transmission member.   2. The main frame of the passenger conveyor according to claim 1, wherein the load transmission member includes a first load transmission member constituted by a member having a plate thickness t21 and a second load transmission member constituted by a member having a plate thickness t22. The first and second load transmitting members are configured to form at least a surface facing the width direction of the main frame, a surface facing the longitudinal direction of the main frame, and a surface facing the vertical direction. The main frame of the passenger conveyor, wherein t1 <t21 and t22 <t3.   The main frame of the passenger conveyor according to claim 5, wherein the side plate includes at least a first surface facing a vertical direction and a second surface facing a main frame width direction, and the first load transmission member. Comprises at least a third surface facing the longitudinal direction of the main frame and a fourth surface facing the vertical direction, and the second load transmitting member has at least a fifth surface facing the longitudinal direction of the main frame and the main frame. A sixth surface facing the width direction, wherein the third surface of the first load transmission member is connected to the fifth surface of the second load transmission member, and the first load transmission The fourth surface of the member is connected to the first surface of the side plate, the sixth surface of the second load transmitting member is connected to the second surface of the side plate, and A main frame of a passenger conveyor, wherein the fifth surface of the second load transmission member is connected to the beam.

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