JP5951692B2 - Passenger conveyor steps and manufacturing method thereof - Google Patents

Description

Embodiments of the present invention relate to passenger conveyor steps and methods of manufacturing the same.

  Conventionally, when a step frame made of aluminum die-casting is used for the passenger conveyor, the rear hoist made of a soft material at the corner where the cleat surface and the riser surface meet to reduce injury when the passenger falls. Application com is attached to the step frame.

Japanese Patent Application Laid-Open No. 11-314872

  When the rear demarcation comb is fixed to the aluminum die-cast step frame as described above, it is screwed. In order to perform this screwing, it is necessary to open a plurality of nut mounting holes in the step frame.

  However, there has been a problem that a molten metal flow failure occurs in the vicinity of the nut mounting hole during casting by aluminum die casting.

Therefore, in view of the above problems, an embodiment of the present invention aims to provide a passenger conveyor step and a manufacturing method thereof that can prevent the molten material from flowing poorly in the vicinity of the nut mounting hole of the step frame.

An embodiment of the present invention relates to a step of a passenger conveyor having a step frame including a skeleton member, a cleat surface provided on an upper surface of the skeleton member, and a riser surface provided on a rear surface of the skeleton member. In the step frame, a stepped portion made of a horizontal plate and a vertical plate is formed at a corner portion in the left-right direction where the cleat surface and the riser surface intersect, a nut mounting hole penetrates the horizontal plate, and the nut mounting hole The planar shape becomes narrower toward the rear, and the thickness of the horizontal plate with the nut mounting hole opened becomes thinner toward the front, and the demarcation comb, which is made of a soft material, is disposed on the step of the step frame. is, the speed nut is fitted into the nut mounting hole of the stepped portion, a tapping screw into the speed nut of the step portion from the rear demarcation comb of the screw hole Combined with, said rear demarcation comb to the stepped portion of the footstep frame is screwed, which is the step of the passenger conveyor.

Explanatory drawing seen from the side of the escalator of Embodiment 1. FIG. The perspective view of the step. The side view of a step frame. A top view of the cleat surface. The rear view of a riser surface. The perspective view of the step part of a step frame. The longitudinal cross-sectional view of a step part. The top view of the type | mold in a step part. AA line sectional view in FIG. The perspective view of the step part of the step frame of Embodiment 2. FIG. The top view of the type | mold in a step part similarly. BB sectional drawing of FIG. CC sectional view taken on the line in FIG.

  Hereinafter, the escalator 10 according to an embodiment of the present invention will be described with reference to the drawings.

Embodiment 1

  The escalator 10 of Embodiment 1 is demonstrated based on FIGS.

(1) Escalator 10
The structure of the escalator 10 will be described with reference to FIG. FIG. 1 is an explanatory view of the escalator 10 as seen from the side.

  A truss 12 of the escalator 10 is supported using support angles 2 and 3 across the upper and lower floors of the building 1.

  A driving device 18 is provided inside the upper floor machine room 14 at the upper end of the truss 12. The drive device 18 includes a motor 20 including an induction motor (induction motor) and a drive chain 22 operated by the motor 20, and a drive sprocket 24 is rotated by the drive chain 22. A control device 50 is provided in the machine room 14 on the upper floor side.

  A driven sprocket 26 is provided inside the lower floor side machine room 16 at the lower end of the truss 12, and a pair of left and right endless step chains 28, 28 are spanned between the drive sprocket 24 and the driven sprocket 26. A plurality of steps 30 are attached to the pair of left and right step chains 28, 28 at equal intervals, the wheel 30a of the step 30 travels on a guide rail (not shown), and the wheel 30b travels on the guide rail 25.

  On the left and right sides of the truss 12, a pair of left and right balustrades 36, 36 are erected. A handrail belt 38 moves in synchronization with the step 30 over the balustrade 36. A front skirt guard 40 on the upper floor side is provided in the lower front part on the upper floor side of the balustrade 36, and a front skirt guard 42 on the lower floor side is provided in the lower front part on the lower floor side. The inlet portions 46 and 48 that are the entrances and exits of the handrail belt 38 protrude. A skirt guard 44 is provided at the lower side of the balustrade 36. Operation panels 52 and 56 and speakers 54 and 58 are provided on the upper and lower floors on the inner surface of the front skirt guards 40 and 42 or the skirt guard 44, respectively.

  A boarding board 32 on the upper floor is provided at the entrance of the ceiling surface of the machine room 14 on the upper floor side, and a boarding board 34 on the lower floor side is provided at the entrance of the ceiling surface of the machine room 16 on the lower floor side. It has been.

(2) Step 30
Next, the structure of the step 30 will be described with reference to FIGS.

  The step 30 has a step frame 60 made of aluminum die cast. As shown in FIGS. 2 and 3, the step frame 60 has a cleat surface 64 integrally cast on the upper surfaces of a pair of left and right triangular frame members 62, and a riser surface 66 integrally cast on the rear surface of the frame members 62. Yes. Further, in the central portion of the triangular skeleton member 62, a hand opening 68 for reducing weight and making it easy for an operator to hold is opened. Bearing portions 70 are integrally cast on both the left and right sides of the upper front end of the step frame 60, and the wheels 30a are attached. Bearing protrusions 72 are integrally casted on both the left and right sides of the lower part of the rear end of the skeleton member 62, and a wheel 30b is rotatably attached to the tip thereof.

  Three front demarcation combs 74 made of a soft material such as synthetic resin or rubber are screwed to the front portion of the cleat surface 64, and left demarcation made of the same soft material is attached to both sides of the cleat surface 64. The comb 76 and the right demarcation comb 78 are screwed. A rear demarcation comb 80 made of a soft material such as synthetic resin or rubber is screwed to the left and right corners where the cleat surface 64 and the riser surface 66 intersect. The screwing structure of the demarcation comb 80 will be described in detail later.

  Cleat ridges 82 are formed on the cleat surface 64 in the front-rear direction, and a cleat groove 84 is formed between adjacent cleat ridges 82, 82.

  The riser surface 66 has an arcuate shape that swells rearward. A riser ridge 86 is formed in the vertical direction on the surface, and a riser groove 88 is formed between the adjacent riser ridges 86, 86.

(3) Screwing structure of the rear demarcation comb 80 Next, the screwing structure of the rear demarcation comb 80 will be described with reference to FIGS.

  As shown in FIGS. 3 to 5, a step portion 90 is integrally cast in the left-right direction at a corner portion in the left-right direction where the cleat surface 64 and the riser surface 66 intersect in the step frame 60. As shown in FIG. 6, the step portion 90 includes a horizontal plate 92 and a vertical plate 94, and the vertical plate 94 extends upward from the front end portion of the horizontal plate 92.

  As shown in FIG. 4, a plurality of nut attachment holes 96 are opened in the horizontal plate 92 at predetermined intervals. The nut mounting hole 96 is a heptagon whose plane shape is bilaterally symmetric. As shown in FIG. 6, the first side 961 of the nut mounting hole 96 is formed in the left-right direction, and the second side 962 and the third side 963 are The third side 963 and the fourth side 964 are formed in parallel in the front-rear direction, and the sixth side 966 and the seventh side 967 are formed so as to narrow toward the front.

  Regarding the thickness of the horizontal plate 92 of the stepped portion 90, the thickness of the front portion of the nut mounting hole 96 is thicker than the thickness of the rear portion as shown in FIG. 7, and the thickness of the front portion is t + a. . The change in the thickness of the horizontal plate 92 changes from t to t + a because the inclined surface 93 is formed on the horizontal plate 92.

  As shown in FIGS. 6 and 7, a metal plate is bent into a U shape and a speed nut 98 having a screw hole is fitted in the nut mounting hole 96. The speed nut 98 is fitted from the front part to the rear part of the nut attachment hole 96 as shown in FIG. 7, and the tip part is attached so as to sandwich the horizontal plate 92. The speed nut 98 is also called a “clip nut”. The distance between the fourth side 964 and the fifth side 965 of the nut mounting hole 96 is slightly larger than the left-right direction of the speed nut 98 so that the speed nut 98 can be fitted into the nut mounting hole 96. 5 cm.

  After the speed nut 98 is fitted in the nut mounting hole 96, the rear demarcation comb 80 is disposed on the step portion 90. The rear demarcation comb 80 has a rectangular parallelepiped comb main body 801 that is long in the left-right direction, an upper protruding piece 802 that protrudes from the upper surface of the comb main body 801, and a rear protruding piece 803 that protrudes from the rear surface of the comb main body 801. The upper protrusion 802 is formed at a position corresponding to the cleat protrusion 82, and the rear protrusion 803 is formed at a position corresponding to the riser protrusion 86. As shown in FIG. 7, a screw hole 804 penetrates in the vertical direction at the position of the comb main body 801 corresponding to the nut mounting hole 96 opened in the step portion 90 of the step frame 60.

  When the rear demarcation comb 80 is disposed on the stepped portion 90, the tapping screw 100 is screwed through the screw hole 804 of the rear demarcation comb 80 and is also screwed with the speed nut 98. As a result, the rear demarcation comb 80 and the step frame 60 are screwed together.

(4) Casting Method for Step Frame 60 Next, a casting method for the step frame 60 will be described with reference to FIGS. In particular, in the present embodiment, a method for casting the step portion 90 of the step frame 60 will be described.

  The cavity portion 104 provided in the mold 102 has a shape corresponding to the stepped portion 90, and the planar shape of the cavity portion 104 is formed with a protruding portion 106 corresponding to the nut mounting hole 96 as shown in FIG. ing. The projecting portion 106 corresponds to the heptagonal nut mounting hole 96 and has walls corresponding to the first side 961 to the seventh side 967.

  When molten aluminum or an aluminum alloy (hereinafter referred to as “molten material”) is poured into the cavity 104, a hot water flow is generated around the heptagonal protrusion 106, and the molten material is as shown in FIG. Then, it flows from the rear to the front so as to surround the heptagonal protrusion 106. In this case, since the first side 961 and the second side 962 at the rear part of the protruding portion 106 are formed in a triangular shape, the melted material easily flows along the protruding portion 106 as shown in FIG. Since the sixth side 966 and the seventh side 967 of the front part of the protruding part 106 are also formed in a triangular shape, the molten material flows so that the molten material gathers at the front center part of the protruding part 106 as shown in FIG. As a result, hot water flow defects do not occur as in the prior art.

  Further, as shown in FIG. 9, since the thickness of the cavity 104 is reduced from t + a to t as the front part is reached, the rate of hot water flow through the cavity part 104 is increased toward the front part and is not easily solidified by cooling by the mold 102. As a result, there is no defective product due to poor hot water flow.

(5) Effect According to the present embodiment, the first side 961 and the second side 962 of the rear part of the heptagonal protrusion 106 corresponding to the nut attachment hole 96 are formed in a triangular shape so as to expand toward the front. The material melted at the time of casting tends to flow along the protrusion 106.

  Further, since the sixth side 966 and the seventh side 967 at the front part of the heptagonal projection 106 corresponding to the nut mounting hole 96 are formed in a triangular shape that narrows toward the front, the material melted at the time of casting No hot water flow failure occurs and no defective product is generated.

  Moreover, the rear demarcation comb 80 made of a soft material can be screwed only by attaching the speed nut 98 to the nut attachment hole 96 of the stepped portion 90.

Embodiment 2

  Next, the step 30 of Embodiment 2 is demonstrated based on FIGS.

  The difference between the present embodiment and the first embodiment is first the planar shape of the nut mounting hole 96. The nut mounting hole 96 according to the first embodiment is a heptagon that is bilaterally symmetric and formed so that the front part and the rear part are narrower. However, the nut attachment hole 97 of this embodiment is a symmetrical hexagon. Specifically, as shown in FIG. 10, the nut attachment hole 97 has a first side 971 that is parallel to the left-right direction, a second side 972 and a third side 973 that extend forward, and a fourth side 974 and a first side. The fifth side 975 is parallel to the front-rear direction, and the sixth side (that is, the front edge) 976 is parallel to the left-right direction.

  Further, the present embodiment is different from the first embodiment in that the thickness of the sixth side 976 (thickness of the horizontal plate 92) is smaller than the thickness t of other portions, and is formed at tb.

  When the speed nut 98 is attached, it is fitted from the front part of the nut attachment hole 97 as shown in FIG.

  Moreover, when casting the step part 90 of the step frame 60 of this embodiment, as shown in FIGS. 11-13, the rear part of the hexagonal protrusion part 107 corresponding to the nut attachment hole 97 becomes narrow toward the front. Therefore, the melted material is easy to flow (see FIG. 11), and since the thickness t + a of the rear portion of the horizontal plate 92 is reduced from the thickness t of the front portion, the melted material hardly flows and hardens (see FIG. 11). 12). In particular, since the thickness tb of the sixth side 976 is further thinner than t, the speed of the melted material becomes faster, and a hot water flow such as a vortex is generated even in front of the hexagonal protrusion 107. No (see FIG. 13).

Example of change

  In the first embodiment, the thickness of the horizontal plate 92 in front of the nut mounting hole 96 is t. However, as in the thickness t-b of the second embodiment, the thickness is made thinner than the other portions, so that the molten material can be quickly removed. The hot water flow may be further prevented from flowing.

  In the above-described embodiment, the step 30 of the escalator 10 has been described. However, it may be used for a step on a moving sidewalk instead.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Escalator, 30 ... Step, 60 ... Step frame, 62 ... Skeletal member, 64 ... Cleat surface, 66 ... Riser surface, 80 ... Rear demarcation comb, 90 ... Step part, 92 ... Horizontal plate, 94 ... Vertical plate, 96 ... Screw hole, 98 ... Speed nut, 100 ... Tapping screw, 102 ... Type, 104 ... .Cavity part, 106 ... protrusion

Claims (9)

A skeleton member;
A cleat surface provided on an upper surface of the skeleton member;
In the step of the passenger conveyor having a step frame with a riser surface provided on the rear surface of the skeleton member,
The step frame is
A stepped portion consisting of a horizontal plate and a vertical plate is formed at the corner in the left-right direction where the cleat surface and the riser surface intersect,
A nut mounting hole passes through the horizontal plate,
The planar shape of the nut mounting hole becomes narrower toward the rear, and the thickness of the horizontal plate with the nut mounting hole opened becomes thinner toward the front,
The steps are
A rear demarcation comb made of a soft material is arranged on the step portion of the step frame,
A speed nut is fitted into the nut mounting hole of the step,
The tapping screw is screwed into the speed nut of the step portion from the screw hole of the rear demarcation comb, and the rear demarcation comb is screwed to the step portion of the step frame.
Passenger conveyor steps. The planar shape of the nut mounting hole is narrower toward the front,
The step of the passenger conveyor according to claim 1. The plane shape of the nut mounting hole is a symmetrical heptagon.
The step of the passenger conveyor of Claim 2. The front edge of the nut mounting hole is formed in parallel with the left-right direction,
The step of the passenger conveyor according to claim 1. The thickness in the left-right direction of the front edge of the nut mounting hole is thinner toward the center,
The step of the passenger conveyor according to claim 2 or 4. The left and right dimension of the nut mounting hole is wider than the width of the speed nut,
The step of the passenger conveyor according to claim 1. The passenger conveyor is an escalator or a moving sidewalk.
The step of the passenger conveyor according to claim 1. A speed nut is fitted from the front of the nut mounting hole of the stepped portion,
The step of the passenger conveyor according to claim 1. A method for manufacturing the steps of the passenger conveyor according to claim 1,
Molten aluminum into a mold, or, pouring the aluminum alloy, casting the Stepping stage frame,
A method for manufacturing passenger conveyor steps.

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