JP2011195213A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor including a frame body using a steel plate and capable of improving welding efficiency while securing necessary strength.SOLUTION: The frame body 2 of the passenger conveyor installed in a building structure comprises the press molded steel plate, and is formed by combining a plurality of divided frame bodies each having a U-shaped cross section with each other. The divided frame bodies 2a1, 2a2 include: a positioning part 12 comprising projections 12a formed on one jointed face of the divided frame bodies 2a1, 2a2 adjacent to each other and recesses 12b which are formed on the other and to which the projections 12a are fitted; and corner boxing holes 13 each comprising a first recess 13a formed on one jointed face of the divided frame bodies 2a1, 2a2 adjacent to each other and a second recess 13b formed on the other and opposing to the first recess 13a. By performing corner boxing by using the corner boxing holes 13, welding is enabled limited to a section near a portion to which large stress is applied.

Description

  The present invention relates to passenger conveyors such as escalators and moving walkways, and more particularly to the structure of the frame.

  Generally, the frame of a passenger conveyor has a structure in which a plurality of steel materials such as L-shaped steel and flat steel are combined by welding, bolts and nuts to form a truss (for example, see Patent Document 1).

  In addition, as a welding joining method of steel materials, conventionally, a plurality of rectangular wave-like both end joining portions that mesh with each other at both end portions of a steel plate are formed, and a plurality of spot welding portions are applied to the joining portions and integrated. (For example, refer to Patent Document 2).

JP 63-57485 (FIG. 2) Japanese Patent Laid-Open No. 2002-181974 (paragraph numbers 0015 to 0018, FIG. 1)

  However, since the conventional frame described above forms a truss by combining a plurality of steel materials, there is a problem that the number of members is large and it takes time to create the truss.

  Therefore, it is conceivable to process the steel plate into a frame, but considering the dimensions of the steel plates that are generally distributed, it is necessary to connect a plurality of steel plates by welding. However, since a bending moment is applied to the side member of the frame body, in the surface of the side member, compressive stress is applied to the upper surface portion side and tensile stress is applied to the bottom surface portion side. The distance from the center of the side member increases. Therefore, when welding the side members, it is necessary to continuously weld the contact surfaces of the side members in order to prevent the occurrence of cracks from the weld toes. It was necessary to connect the weld beads on the front and back surfaces by turning welding. In the case of processing a steel plate into a frame body in this way, since welding over a long distance is required, there arises a problem that labor and cost are required.

  The latter described above is intended to increase the strength of the joining portion of the steel plate, and forms a plurality of rectangular wave-like end joining portions that mesh with each other at both ends of the steel plate, and a plurality of spots at the joining portion. The welded portion is provided, and the above-described problems are not solved.

  The present invention has been made from the above-described actual state of the prior art, and its purpose is to make a frame using a steel plate, and a passenger who can improve the welding efficiency while ensuring the necessary strength. To provide a conveyor.

  In order to achieve the above object, the present invention circulates a frame body installed in a building structure, boarding floors provided at both longitudinal ends of the frame body, and an endless connection between the boarding floors. A rotating step chain and steps, a main sprocket and a sub sprocket arranged near the landing floor and around which the step chain is wound, a driving sprocket provided on a driving shaft fixed to the main sprocket, and the driving sprocket In the passenger conveyor provided with a driving device that transmits a rotational force to the frame, the frame body is made of a press-formed steel plate and is formed by combining a plurality of divided frame bodies having a U-shaped cross-sectional shape. In addition, the divided frame body includes a convex portion formed on one of the joint surfaces of the adjacent divided frame bodies and a concave portion formed on the other and fitted with the convex portion. A hole for corner-turning welding comprising a positioning portion, a first concave portion formed on one of the joint surfaces of the divided frame bodies adjacent to each other, and a second concave portion formed on the other side and facing the first concave portion And is provided.

  In the present invention configured as described above, when joining the divided frame bodies adjacent to each other, the convex portion formed on one of the joint surfaces of the adjacent divided frame bodies and the concave portion formed on the other are fitted to each other. Positioning is performed by combining. Accordingly, positioning can be easily performed without requiring a special device. Further, the first recess formed on one of the joint surfaces of the divided frame bodies adjacent to each other and the second recess formed on the other are opposed to each other to form a hole for welding, By performing the corner turning welding using the hole for corner turning welding, it is possible to perform welding only in the vicinity where a large stress is applied. As a result, it is possible to prevent the occurrence of cracks from the weld toe and improve the welding efficiency while ensuring the necessary strength.

  According to the present invention, positioning can be easily performed without requiring a special device, and workability can be improved. In addition, it is possible to reduce the amount of welding while preventing cracking from the weld toe and ensuring the necessary strength, thereby shortening the product manufacturing time and reducing the cost. it can. Furthermore, by reducing the welding amount, the deformation of the welded portion and the residual stress can be relaxed, and a highly accurate product can be realized.

It is a schematic block diagram of the passenger conveyor to which this invention is applied. It is sectional drawing of the passenger conveyor which follows the II line | wire of FIG. It is an enlarged view of the V section of FIG. 1 which shows one Example of the passenger conveyor of this invention. It is a principal part perspective view of the W part of FIG. It is explanatory drawing which shows the shearing force F and bending moment M which act on the frame of a passenger conveyor. It is explanatory drawing which shows the stress distribution of the stress added to the surface of the side member in the J part of FIG.

  Embodiments of a passenger conveyor according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the passenger conveyor in the present embodiment, for example, an escalator, is a building structure 1, that is, a frame body 2 installed between an upper-floor building 1 a and a lower-floor building 1 b, and the frame body 2. A boarding floor 3a, 3b provided at both ends in the longitudinal direction, a main sprocket 4 and a sub sprocket 5 disposed in the vicinity of the boarding floor 3a, 3b, and the boarding floor 3a, 3b are connected endlessly to circulate. A step chain 6 and a step 7 that move, a drive unit 8 that drives the step chain 6, and a balustrade 9 that faces the left and right along the rotational direction of the step 7 are provided.

  As shown in FIG. 2, the frame body 2 is arranged in pairs so as to face each other, and is erected on the inner side of the side member 2 a having a U-shaped cross-sectional shape and the side member 2 a. A vertical member 2b and a cross beam 2c installed between the left and right side members 2a are provided, and each is joined by welding, bolts and nuts. A balustrade base 10 is provided on the upper surface of the side member 2a, and the lower part of the balustrade 9 is fixed by the balustrade base 10. Furthermore, rails 11a, 11b, and 11c are attached to the vertical member 2b so that the wheel 7a of the step 7 travels.

  As shown in FIG. 3, the frame body 2 of the present embodiment is made of a press-formed steel plate, and a plurality of divided frame bodies 2a1, 2a2, 2a3 having a U-shaped cross-sectional shape are joined by welding. Thus, the intermediate frame 2B is formed. Further, joints 2B1 and 2B2 are fixed to both ends of the intermediate frame 2B, the joint 2A1 of the upper frame 2A and the joint 2B1 of the intermediate frame 2B are fastened with bolts B, and the lower frame The joint 2C1 of the body 2C and the joint 2B2 of the intermediate frame 2B are fastened with bolts B to form the frame 2.

  As shown in FIG. 4, the divided frame bodies 2 a 1, 2 a 2, and 2 a 3 are formed on the adjacent divided frame bodies, for example, the convex portion 12 a formed on one of the joint surfaces of the divided frame bodies 2 a 1 and 2 a 2, and the other. The positioning portion 12 including the concave portion 12b into which the convex portion 12a is fitted, the first concave portion 13a formed on one of the joint surfaces of the divided frame bodies adjacent to each other, for example, the divided frame bodies 2a1 and 2a2, and A square turning welding hole 13 is provided which is formed on the other side and includes a second recess 13b which faces the first recess 13a. The divided frame bodies 2a1 and 2a2 are joined and integrated with each other by welding 14a and 14b.

  By the way, as shown in FIGS. 5 (a) and 5 (b), the frame 2 constructed between the upper floor building 1a and the lower floor building 1b has a shear force F due to its own weight and passenger weight. A bending moment M is applied. As shown in FIG. 5C, the shearing force F and the bending moment M are balanced with respect to the centers of the side members facing each other, and substantially the same force is applied in the planes of the side members on both sides. Further, as shown in FIG. 6A, since the bending moment M is applied to the side member 2a, a compressive stress is applied to the top surface side and a tensile stress is applied to the bottom surface side in the surface of the side member 2a. . These compressive and tensile stresses increase as the distance from the center of the side member 2a increases as shown in FIG. For this reason, when welding the side member 2a, the contact surface of the side member 2a is continuously welded in order to prevent the occurrence of cracks from the weld toe, and the surface and back surfaces are welded by cornering welding. It is required to connect welding beads.

  Therefore, in this embodiment, as shown in FIG. 4, a cornering welding hole 13 is provided on the joint surface of the divided frame bodies 2 a 1 and 2 a 2, and conventionally, cornering welding performed at the end of the side member is performed. Rotation was performed using the corner hole 13 for welding. Further, when the adjacent divided frame bodies 2a1 and 2a2 are joined, the convex portion 12a formed on one of the joint surfaces of the adjacent divided frame bodies 2a1 and 2a2 and the concave portion 12b formed on the other are mutually connected. Positioning is performed by fitting. The convex portion 12a and the concave portion 12b of the positioning portion 12 and the first concave portion 13a and the second concave portion 13b of the corner turning welding hole portion 13 are considered in consideration of positioning accuracy and prevention of misunderstanding of the welding end portion. High dimensional accuracy is required. For this reason, these convex part 12a, the recessed part 12b, the 1st recessed part 13a, and the 2nd recessed part 13b shall be formed with the apparatus which can be cut | disconnected with the precision equivalent to it with a laser processing machine.

  According to this embodiment, when joining the divided frame bodies adjacent to each other, the convex portion 12a formed on one of the joint surfaces of the adjacent divided frame bodies and the concave portion 12b formed on the other are fitted to each other. Positioning is performed by combining. Accordingly, positioning can be easily performed without requiring a special device, and workability can be improved. In addition, the first recess 13a formed on one of the joint surfaces of the adjacent divided frame bodies and the second recess 13b formed on the other face each other to form a cornering welding hole 13 However, by performing corner welding using the hole 13 for corner turning welding, it becomes possible to perform welding only in the vicinity where a large stress is applied, and the occurrence of cracks from the weld toe is prevented. In addition, it is possible to reduce the welding amount while ensuring the necessary strength. As a result, the production time can be shortened and the cost can be reduced. Furthermore, by reducing the welding amount, the deformation of the welded portion and the residual stress can be relaxed, and a highly accurate product can be realized. In particular, when the present invention is applied to a frame of a high-lift escalator having many joints or a moving sidewalk in which the length of the frame is several tens of meters, the effect becomes more remarkable.

  In the above-described embodiment, an example in which two sets of positioning portions 12 are provided on each of the divided frame bodies 2a1 and 2a2 adjacent to each other is shown. However, the present invention is not limited to this, and the number and shape are arbitrarily set. Can be set.

DESCRIPTION OF SYMBOLS 1 Building structure 2 Frame 2a Side member 2a1, 2a2, 2a3 Divided frame 2b Vertical material 2c Cross girder 2A Upper frame 2A1 Joint 2B Intermediate frame 2B1, 2B2 Joint 2C Lower frame 2C1 Joint 3a, 3b Getting on and off 4 Main sprocket 5 Sub sprocket 6 Step chain 7 Step 8 Driving machine 9 Railing 10 Base for railing 11a, 11b, 11c Rail
12 Positioning part 12a Convex part 12b Concave part 13 Hole for corner turning welding 13a First concave part 13b Second concave part

Claims (1)

Frames installed in the building structure, boarding / exiting floors provided at both ends in the longitudinal direction of the frame, step chains and steps that are connected endlessly between these boarding / exiting floors and circulate and rotate, and under the boarding / exiting floors A main sprocket and a sub sprocket that are arranged in the vicinity and on which the step chain is wound, a driving sprocket provided on a driving shaft fixed to the main sprocket, and a driving device that transmits a rotational force to the driving sprocket. In the passenger conveyor
The frame body is made of a press-formed steel plate, and is formed by combining a plurality of divided frame bodies having a U-shaped cross-sectional shape, and the divided frame bodies include divided frame bodies adjacent to each other. A positioning part comprising a convex part formed on one of the joint surfaces, and a concave part formed on the other and into which the convex part is fitted, and a first concave part formed on one of the joint surfaces of the adjacent divided frame bodies And a corner conveyor welding hole formed of a second recess formed on the other side and facing the first recess.

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