JPS6364387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a main frame of a circular escalator having an annular conveyance path.

The circular escalator is provided with a main frame that forms an arcuate and inclined conveyance path in a horizontal projection plane. This main frame is composed of a truss that has an annular shape in the horizontal projection plane and a square shape in the cross section, but the inclination angle of the main frame is not the same on the inside and outside of the ring, and the chord members of the truss Since it is necessary to mold the material into a three-dimensionally curved shape, the processing requires a lot of time and effort, and there is also the problem that the precision with respect to the desired shape is low.

The present invention aims to eliminate the above-mentioned drawbacks and provides a main frame of a circular escalator that is polygonal in plan and can be easily manufactured.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

In the figure, 1 is the main frame of a circular escalator, 2 is a conveyance path provided on the main frame 1, in which a large number of steps 2a are arranged in succession, and is annular in the horizontal projection plane and is inclined. ₁ corresponds to the outside of the circular ring of the conveying path 2, and is the radius at the middle of the longitudinal direction of the conveying path 2,
R ₂ corresponds to the inside of the circular ring of the conveying path 2 and is the radius at the middle of the longitudinal direction of the conveying path 2; R' ₁ corresponds to the outside of the circular ring of the conveying path 2 and is the radius at the longitudinal end of the conveying path 2;
R′ ₂ corresponds to the inside of the ring of the conveying path 2 and is the radius at the longitudinal end of the conveying path 2, O ₁ is the radius of the upper end of the conveying path 2
The center of R′ ₁ and R′ ₂ , O ₂ is inside the radius R ₁ and R ₂ , O ₃ is the center of the radius R′ ₁ and R′ ₂ at the lower end of the conveyance path 2, A ₁ is the center of the conveyance of the main frame 1 A _{13 is the upper end of the upper surface outside the ring of path 2, A 13} is the lower end of the upper surface outside the ring of conveyance path 2 of the main frame 1, and A ₂ to _{A 12} are
The bending point of the main frame 1 between A ₁ and A ₁₃ , B ₁ is the upper end of the inner upper surface of the circular ring of the transport path 2 of the main frame 1, and B ₁₃ is the lower end of the upper surface of the inner ring of the transport path 2 of the main frame 1. , B ₂ to B ₁₂ are B ₁ ,
B ₁₃ is the bending point of main frame 1, D ₁ is the conveyance path 2 of main frame 1
D 13 is the upper end of the outer bottom surface of the ring, D ₁₃ is the lower end of the outer bottom surface of the ring of conveyance path 2 of main frame 1, D ₂ to D ₁₂ are the bending points of main frame 1 between D ₁ and D ₁₃ , and E ₁ is E ₁₃ is the upper end of the inner bottom surface of the circular ring of the conveyance path 2 of the main frame 1, E 2 to E 12 are the lower ends of the inner bottom surface of the circular ring of the conveyance path 2 of the main frame 1, and E ₂ to E ₁₂ are the main frame 1 between E ₁ and E ₁₃ . 3 is a truss unit that forms a space between adjacent bending points in the longitudinal direction of the main frame 1, 4 is an outer top chord member of the truss unit 3, 5 is an outer bottom chord member, and 6 is an inner upper chord member. 7 is an inner bottom chord member, 8 is an outer upper surface, and an intermediate member of the truss unit 3 which connects the bottom chord members 4 and 5 and is arranged in the vertical direction;
8' is an intermediate member vertically arranged to connect the inner upper and bottom chord members 6 and 7; 9 is a diagonal member of the truss unit 3 that connects the outer upper and bottom chord members 4 and 5; 9'
is a diagonal member connecting inner upper and bottom chord members 6 and 7, 1
0 is the cross member of the truss unit 3 connecting the outer and inner bottom chord members 5 and 7 or the outer and inner intermediate members 8 and 8';
11 is a cross member connecting the outer and inner intermediate members 8, 8' at their longitudinal midpoints; 12 is a joint disposed at the bending point of the main frame 1; 12a is a core material of this;
Reference numeral 2b is a leg portion provided on both sides with one end welded to the core material 12a, and 13 is a bolt inserted through the chord member of the truss unit 3 and the leg portion 12b of the joint 12, and a nut screwed into this bolt. In the fastener, H is the distance between the upper and lower ends of the main frame 1, that is, the height of the main frame 1, θ ₁ is the inclination angle of the outer side of the conveyor path 2 of the main frame 1, and θ ₂ is the slope of the main frame 1. The inclination angle θ ₃ is approximately equal to the angle θ 1 of the outer side of the conveyor path 2 ring of the truss unit ₃ , and θ ₄ is the angle θ _{2 of the inner side of the conveyor path 2 ring of the truss unit 3} . L ₁ is the developed length of the outer ring of the conveying path 2 along the horizontal line of the inclined part of the main frame 1, and L ₂ is the length of the inner ring of the conveying path 2 along the horizontal line of the inclined part of the main frame 1. The unfolded length, L ₃ , is the conveyance path 2 of the truss unit 3.
L 4 is the depth perpendicular to the longitudinal direction on the outside of the ring, L ₄ is the depth perpendicular to the longitudinal direction on the inside of the ring of the conveyance path 2 of the truss unit 3, and L ₅ is the depth between the bending points of the conveyance path 2 of the main frame 1 on the outside of the ring. The length L ₆ along the horizontal line between the two is the length along the horizontal line between the bending points on the inner side of the conveyor path 2 of the main frame 1.

That is, a large number of truss units 3 are arranged in series, and their ends are connected to the fasteners 13 through joints 12.
A main frame 1 having a polygonal shape is constructed by being connected by. Since each of the truss units 3 is constructed in a straight line, a unit with higher strength against truss stress can be obtained compared to a curved truss, and since the truss unit is in a straight line, it can be manufactured easily and at low cost. In addition, since the intermediate members 8 and 8' are arranged vertically, the shape of the truss unit 3 can be simplified, and the ratio of the length corresponding to the outer length L ₅ and the inner length L ₆ of the truss unit 3 can be adjusted to Ratio of the outer radius R ₁ and the inner radius R ₂ of the path 2, or the outer radius R′ ₁ and the inner radius R′ ₂
By setting the ratio to be equal to the ratio, the refraction point on the bottom surface is placed directly below the refraction point on the top surface, and the shape of the truss unit 3 is simplified without causing any deviation between the refraction points on the top surface and the bottom surface in the horizontal plane. be able to. Furthermore, by forming the side surface of the truss unit 3 into a parallelogram with opposite sides being the ends along the vertical line, the plurality of intermediate members 8 or 8' can be made of the same member, thereby improving productivity. In addition, the ratio of the outer depth L ₃ and the inner depth L ₄ of the conveyor path 2 ring of the truss unit 3 is the opposite of the cosine of the outer angle θ ₁ and the inner angle θ ₂ of the conveyor path 2 ring of the main frame 1. By setting the horizontal members 10 and 11 to the same ratio, the horizontal members 10 and 11 can be installed horizontally, and although not shown in the figure, it is easy to install members that run vertically on the main frame 1, such as rails that guide the steps of an escalator. It can be attached to. Further, since the truss units 3 are connected to each other by the joints 12, the angular changes at the connecting portions of the truss units 3 can be manufactured in a manner that corresponds to the shape of the joints 12 in an intensive manner. Therefore, the chord members 4 to 7, the intermediate members 8 and 8', the diagonal members 9 and 9', and the cross members 10 and 11 do not need to be curved or twisted, and can easily be made straight. can be produced.

As explained above, the present invention has a polygonal main frame, each of which is linearly arranged, a large number of which are arranged in series, and whose opposing ends are connected to each other to form a toric-shaped and inclined conveyance path in a horizontal projection plane. is formed by a truss unit. As a result, it is possible to realize a main frame of a circular escalator that has high strength against truss stress, is easy to manufacture, and is inexpensive because each member of the truss unit is straight.

[Brief explanation of drawings]

FIG. 1 is a front view conceptually showing a circular escalator, FIG. 2 is a diagram conceptually showing an embodiment of the main frame of the circular escalator according to the present invention, and is a plan view corresponding to FIG. Figure 4 is a developed view of the left side of the figure, Figure 4 is a developed view of the right side of Figure 2, Figure 5 is an enlarged view of the - line cross section of Figure 2, Figure 6 is an enlarged view of the - line cross section of Figure 2, Figure 7 is an enlarged view of the right side of the section in Figure 2, No. 8
The figure is an enlarged cross-sectional view taken along the - line in Figure 2, and Figure 9 is an enlarged cross-sectional view of Figure 2.
FIG. 10 is an enlarged view of a portion of the figure, and FIG. 10 is a sectional view taken along the line -- of FIG. DESCRIPTION OF SYMBOLS 1... Main frame, 2... Conveyance path, 3... Truss unit, 8, 8'... Intermediate material Note that the same parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Claims] 1. In a conveyor path that is arranged in an annular shape and inclined in a horizontal projection plane, a plurality of straight outer frame truss units forming the outer frame of the ring, and a plurality of linear outer frame truss units facing this outer frame truss unit are provided. a plurality of linear inner frame truss units that are arranged to constitute an inner frame of the annular ring and have a longitudinal length shorter than the length of the opposing outer frame truss units; and a plurality of the outer frames. A circular escalator characterized in that the truss unit and the inner frame truss unit are provided with a joint that bends and joins the opposing outer frame truss unit and inner frame truss unit to the inside of the ring so that the opposing outer frame truss unit and inner frame truss unit are parallel to each other. main frame.