JP7571574B2 - Passenger conveyor step body, demarcation com and passenger conveyor step - Google Patents

Description

This disclosure relates to a passenger conveyor step body, a demarcation comb, and a passenger conveyor step.

Conventionally, many steps on passenger conveyors are equipped with demarcation devices to alert passengers. Patent Document 1 discloses a method for engaging this demarcation device.

Patent No. 5649673

When manufacturing or maintaining the steps of a passenger conveyor, it is necessary to position the demarcation. In Patent Document 1, the positioning of the demarcation is not taken into consideration. In addition, Patent Document 1 does not take into consideration the ease of manufacturing steps, which are generally formed by die casting.

The present disclosure is intended to solve the problems described above. The objective of the present disclosure is to obtain a passenger conveyor step body, a demarcation comb, and a passenger conveyor step that are advantageous during manufacturing and maintenance.

The passenger conveyor step body according to the present disclosure is a die-cast passenger conveyor step body in which a demarcation is engaged with the rear end of the step. A recess is formed in the end to which the demarcation can be attached, and a bottom surface of the recess is formed with an elongated hole for mounting a plate-shaped nut part for engaging the demarcation, a groove into which the nut part is fitted, and a pair of rib-shaped parts for guiding the nut part. The groove is formed between the pair of rib-shaped parts. The width of the elongated hole is greater than the pitch between the outer sides of the pair of rib-shaped parts. The rear end surface of the cleat of the step is inclined toward the front of the step with respect to the bottom surface of the recess. This end surface is provided with a plurality of convex parts arranged in a specified pattern.
The passenger conveyor step body according to the present disclosure is a die-cast passenger conveyor step body in which a demarcation is engaged with the rear end of the step. A recess is formed in the end to which the demarcation can be attached, and a long hole for mounting a plate-shaped nut part for engaging the demarcation and a groove into which the nut part is fitted are formed in the bottom surface of the recess. The groove is formed as a flat part that is one step lower than the periphery of the groove in the bottom surface of the recess. The width of the long hole is larger than the width of the groove. The rear end surface of the cleat of the step is inclined toward the front of the step with respect to the bottom surface of the recess. This end surface is provided with a plurality of convex parts arranged in a specified pattern.
The demarcation comb according to the present disclosure is engaged with the rear end of the step plate. The steps of the passenger conveyor according to the present disclosure include the step body and the demarcation comb.

The present disclosure provides a passenger conveyor step body, a demarcation comb, and a passenger conveyor step that are advantageous during manufacturing and maintenance.

FIG. 2 is a diagram showing a driving structure of a passenger conveyor. FIG. 2 is a diagram showing the step body in the first embodiment as seen from the passenger's perspective. 5A to 5C are diagrams illustrating a method for attaching a nut part to a step body in the first embodiment. A diagram showing the cross-sectional shape of a portion of the molding die for the step body of embodiment 1. FIG. 2 is a diagram showing the shape of a demarcation comb in the first embodiment. 1 is a cross-sectional view of an assembled step when the demarcation comb of embodiment 1 is inserted. FIG. FIG. 13 is a diagram showing the shape of a demarcation comb in a first modified example of the first embodiment. A cross-sectional view showing a method of engaging a demarcation comb in a first modified example of embodiment 1. A diagram showing the shape of a demarcation comb in a second modified example of embodiment 1. 13 is a schematic diagram of a demarcation comb and a step body in a third modified example of embodiment 1. FIG. 13 is a cross-sectional view of an assembled step when a demarcation comb is inserted in the third modified example of embodiment 1. FIG.

Below, an embodiment of a passenger conveyor step according to the present disclosure will be described with reference to the attached drawings. The same reference numerals in each drawing indicate the same or corresponding parts. In this disclosure, duplicated descriptions will be simplified or omitted as appropriate. Note that this disclosure is not limited to the embodiment described below, and may include all combinations and modifications of the configurations disclosed in the following embodiment.

Embodiment 1.
First, an outline of the basic structure of the passenger conveyor will be described. Fig. 1 is a diagram showing a driving structure of the passenger conveyor. Fig. 1(a) is a diagram showing an overall outline of the driving structure of the passenger conveyor. Fig. 1(b) is an enlarged view of a portion surrounded by a rectangle A in the schematic diagram of Fig. 1(a).

A pair of chains 101 are connected endlessly at both left and right ends of the passenger conveyor in the width direction. In addition, a shaft 102 is provided between the chains 101 on both sides, fastened to connect the chains 101 to each other. Multiple shafts 102 are arranged at regular intervals. The steps 106 of the passenger conveyor are fastened to the shafts 102.

The chains 101 on both sides are attached to gears 103 at the top of the passenger conveyor. Power from a motor 104 is transmitted to the gears 103 via another gear 105. The gears 103 are rotated by the power from the motor 104, which drives the chain 101, which is connected endlessly. As the chain 101 is driven, the steps 106 of the passenger conveyor are also driven in the vertical direction.

The steps 106, driven by an endless chain 101, carry passengers and baggage on the outward journey, and then rotate when they reach gear 105. The rotated steps 106 then head back on the return journey in an upside-down position from the outward journey. After completing one revolution, the steps 106 carry passengers and baggage again on the outward journey. Of the components of the passenger conveyor, only those located on the outward journey are visible from the passenger side.

The step 106 is composed of components such as a step 107 on which passengers and baggage are placed, a riser 108 located behind the step 107, and a bracket 109 that engages the step 107 and the riser 108. The bracket 109 has a mechanism for fastening the step 106 to the shaft 102, a mechanism for attaching rollers that allow the step 106 to run smoothly along the rails, etc.

One method for manufacturing the steps 106 is to mold the entire step 106 as a single unit using a die-casting method with metal parts. Another manufacturing method is to press-form the steps 107, risers 108, and brackets 109, and then assemble each part to a frame. After molding and assembly using either method, a painting process is performed in which the entire step 106 is painted black or gray, and then the ends are painted yellow, orange, or the like.

Another manufacturing method is to mold the tread 107 except for its ends using metal materials by die casting or pressing, assemble the tread, and then engage the demarcation molded from a resin material with the step body. This manufacturing method is common and widely used. With this manufacturing method, the demarcation can be molded from a resin material in a color that can attract attention, such as yellow or orange, making the painting process described above unnecessary. Note that the metal material referred to here corresponds to, for example, aluminum alloy material for die casting, such as ADC12, or stainless steel alloy material for pressing, such as SUS304. The resin material corresponds to a plastic resin material, such as polyamide or polyurethane.

Figure 2 is a view of the step body 1 in the first embodiment as seen from the passenger's perspective. Figure 2(a) shows the entire step body 1. Figure 2(b) is an enlarged view of the area enclosed by rectangle B in Figure 2(a). Figure 2(b) is an enlarged view of the rear end of the step 2. In the following, this disclosure will explain the structure of the die-cast step body and the demarcation that engages with the widthwise and front-rear ends of the step 2 relative to the step body 1. In particular, an example of the engagement structure of the demarcation that engages with the corners at the boundary between the rear end of the step 2 and the upper end of the riser 4 will be specifically described.

No cleats are formed on either end of the tread 2 in the width direction, or on the front end or rear end. A recess 3 is formed at each end of the tread 2 to which a demarcation can be attached. This recess 3 is formed in a concave shape that is recessed by the thickness of the base part of the demarcation. The bottom surface of the recess 3 is a flat surface. The height of the bottom surface of the recess 3 is the same at both ends of the tread 2 in the width direction, or on the front end or rear end.

When the bottom surface of the recess 3 is horizontal, the end surface 2a on the rear side of the cleat of the tread 2 shown in Figure 2(b) is not vertical. This end surface 2a is inclined toward the front of the tread 2 with respect to the bottom surface of the recess 3. This is a feature that takes moldability into consideration, as will be described in detail later.

The top surface 5 of the riser 4 is one step higher than the bottom surface of the recess 3. This top surface 5 forms the upper end of the cleat of the riser 4.

On the rear end surface 2a of the cleat of the tread 2, a plurality of long holes 6 are formed in the bottom surface of the recess 3, penetrating to the back surface of the tread 2. The long holes 6 are arranged at regular intervals. In addition, a pair of parallel rib-shaped rib-shaped portions 7 and a groove 8 formed between the rib-shaped portions 7 are provided behind the long holes 6 on the bottom surface of the recess 3. The groove 8 is formed, for example, in a U-shape.

The front end face and rear end face 2a of the cleat of the tread 2 are provided with a convex shaped portion 9 that protrudes forward or rearward. This convex shaped portion 9 is not provided on all cleats, but is arranged in a certain specified pattern. The convex shaped portion 9 is provided on the end face of a predetermined cleat.

In general, demarcation is engaged using parts such as a bolt and a nut. Figure 3 is a diagram explaining the manner in which the nut part 10 is attached to the step body 1 in the first embodiment. In this disclosure, the demarcation is engaged to the step body 1 using a plate-shaped clip-shaped nut part 10, as shown in Figure 3(a).

The nut part 10 is a member having a structure in which a nut is joined to the lower part of a sheet metal part bent into a U-shape. The height dimension of the above-mentioned rib-shaped portion 7 is, for example, about 0.5 mm to 1 mm. This rib-shaped portion functions as a guide for guiding the nut part 10. As an example, the pitch between the inner end faces of the rib-shaped portion 7 is about 1 mm larger than the width of the nut part 10.

The nut part 10 is attached by inserting it through the long hole 6 and sliding it along the rib-shaped portion 7. In the present disclosure, the width of the long hole 6 is greater than the pitch between the outer sides of the pair of rib-shaped portions 7. This makes it easier to attach the nut part 10. As a specific example, the width of the long hole 6 may be approximately 1.5 times the pitch between the outer sides of the pair of rib-shaped portions 7.

The long hole 6 can be of any shape as long as the width is ensured as described above. Figure 3(b) is an enlarged view showing the state in which the nut part 10 has been removed from the state shown in Figure 3(a). As an example, the long hole 6 is formed in a rectangular shape as shown in Figure 3(b).

Figure 3(c) shows a modified example of the recess 3 in which the long hole 6 and the groove 8 are formed. The end of the short side of the long hole 6 may be semicircular as shown in Figure 3(c). The long hole may have a shape with an R portion.

In the configuration example shown in FIG. 3(b), as described above, a groove 8 is formed between a pair of rib-shaped portions 7. The nut part 10 is fitted into the groove 8. Here, the groove 8 into which the nut part 10 is fitted can also be formed as a flat portion that is one step lower than the surrounding area, as shown in FIG. 3(c). The groove 8 can be formed as a flat portion consisting of a flat surface 3a that is about 0.5 mm to 1 mm lower than the surrounding area of the groove 8 at the bottom surface of the recess 3. The wall surface portion connecting the flat surface 3a and the surrounding area functions as a guide when the nut part 10 is attached. According to the modified example shown in FIG. 3(c), it is possible to omit the rib-shaped portion 7. In this modified example, the width of the long hole 6 is set to be larger than the width of the groove 8.

The plate-shaped nut part 10, formed by bending a metal sheet into a U-shape, has a hole 11 in the center for passing a bolt for engagement. The center of this hole 11 coincides with the center of the nut that constitutes the nut part 10. The nut part 10 is inserted so that the U-shaped bent part reaches the rear end of the long hole 6. When the insertion of the nut part 10 is complete, the end of the bolt hole 11 coincides with the end of the groove 8 described above. The shape of the end of the groove 8 opposite the long hole 6 may be semicircular or rectangular, as shown in Figures 3(b) and 3(c).

The long hole 6, the pair of rib-shaped portions 7, and the groove 8 are molded at the same time that the step body 1 is integrally molded by die casting. Figure 4 shows a cross-sectional shape of a portion of the mold for the step body of embodiment 1. C1 and C2 in Figure 4 are enlarged views of the area where the bottom surface of the recess 3 on the rear side of the step 2 is molded.

Figure 4 shows the state in which the mold is set in a die casting machine (not shown), and the movable mold slides due to the machine's clamping mechanism, so that the parting surfaces of the fixed mold and the movable mold mate. The gap 14 that is created when the fixed mold cavity 12 and the movable mold cavity 13 mate has the shape of the step body 1. Molten aluminum alloy is filled into this gap 14 at high speed and solidifies to form the step body 1. After the step body 1 is formed, the movable mold is separated from the fixed mold by the machine's clamping mechanism, and then the ejection pin 15 is driven by the machine's ejection mechanism (not shown), and the molded step body 1 is pushed out of the movable mold cavity 13.

In C2 of FIG. 4, mold part 16 is the part that forms the bottom surface of recess 3. In C1 of FIG. 4, mold part 17 is the part that forms groove 8 and long hole 6. Mold part 18 that forms the wall surface of long hole 6 is composed of fixed mold side cavity 12. Mold part 19 that forms the wall surface of groove 8 is composed of movable mold side cavity 13. In other words, long hole 6 and U-shaped groove 8 are formed at the boundary between fixed mold side cavity 12 and movable mold side cavity 13.

In the mold portion 17, even when the fixed mold cavity 12 and the movable mold cavity 13 are mated, a gap of about 0.5 mm is formed. This gap is necessary to prevent interference between the fixed mold cavity 12 and the movable mold cavity 13 even if the mold temperature rises and expands due to repeated molding. Since this gap is also filled with molten aluminum alloy, when the molded step body 1 is removed from the mold, a thin film burr is formed on the bottom surface of the recess 3 where the long hole 6 and groove 8 are formed. However, the thick burr is thin and can be removed manually, so no cutting is required.

In addition, in C2 of FIG. 4, the mold part 14a is a part that forms the rear end surface 2a of the cleat of the step board 2. Considering the releasability after molding, the shape of the cavity in which the step body 1 is molded is inclined with respect to the moving direction of the mold. Therefore, the cavity part in which the cleat is molded is also inclined in the same way. The molten metal flows from the part that forms the riser 4 through the mold part 16 that becomes the bottom surface of the recess 3 to the gap 14 that becomes the cleat. If the mold part 14a that becomes the end surface 2a of the cleat is perpendicular to the mold part 16 that becomes the bottom surface of the recess 3, the molten metal will not be sufficiently filled at the end surface of the cleat due to the high linearity of the filled molten metal, and air will be trapped. In this case, problems will occur such as a part of the end surface 2a of the cleat being missing after molding, or a poor appearance such as wrinkles or cracks will occur. Therefore, the mold part 14a is made obtuse with respect to the mold part 16 so as to be as parallel as possible to the flow path of the molten metal. As a result, the end surface 2a of the molded cleat becomes an inclined surface that slopes toward the front of the tread 2.

The pair of rib-shaped portions 7 are formed by filling the molten metal into the recessed portions of the fixed mold cavity 12 that correspond to the rib-shaped portions 7. The mold portion that forms the rib-shaped portions 7 is different from the mold portion 19 that forms the wall surface of the groove 8, so there is variation in positional accuracy. Taking this into consideration, the pitch between the rib-shaped portions 7 is set to be approximately 1 mm larger than the width of the nut component 10 to be attached.

The mold part 20 that forms the upper end surface of the riser 4 and the above-mentioned mold part 16 are connected by a wall surface 21. The wall surface 21 is configured to be parallel to or diagonally downward from the sliding direction of the movable mold so that the molded step body 1 does not become caught due to an undercut when it is released from the fixed mold.

Next, we will explain the demarcations that are attached to the step body 1 configured as described above. There are several types of demarcations. Demarcations that engage with the left and right ends of the step 2 are called demarcation cleats. There are demarcation cleats for the left and right sides. On the other hand, demarcations that engage with the front and rear ends of the step 2 are called demarcation combs.

Specifications for passenger conveyors include the conveyor width and rise angle. There are as many types of passenger conveyors as there are combinations of width and rise angle, and there are as many types of steps as there are models of conveyors. The demarcation combs for the front end and rear end have different shapes and cannot be used interchangeably. Also, the combination of demarcation combs used varies depending on the type of step. Furthermore, there is a left demarcation comb that engages adjacent to the left demarcation cleat, and a right demarcation comb that engages adjacent to the right demarcation cleat, with a central demarcation cleat engaged between them. The number of engagements of the central demarcation comb varies depending on the width of the steps.

In the following, this disclosure will provide a detailed explanation of the shape of the demarcation comb that engages with the rear end of the footboard 2. Figure 5 is a diagram showing the shape of the demarcation comb in embodiment 1. Figure 5 shows an overview of the shape of the central demarcation comb that engages with the rear end of the footboard 2. Figure 5(a) is a diagram of the demarcation comb seen from above, and Figure 5(b) is a diagram of the demarcation comb seen from the bottom.

On the upper side of the demarcation comb, cleats 22a and 22b protrude above the upper surface of the base of the demarcation comb. The width, height and inter-cret pitch of cleats 22a and 22b are set to be the same as those of the cleats of the tread 2. The base is also formed with through holes 23 that penetrate from the top surface of the base to the bottom surface of the base, which forms the valley between the cleats. The through holes 23 are holes through which the engagement bolts that engage with the nut parts 10 are passed. The base is formed with countersunk holes 24 in which the bolt heads of the engagement bolts are embedded. As an example, the through holes 23 and countersunk holes 24 are formed in three places.

The cleat 22a is longer than the cleat 22b. The long cleat 22a and the short cleat 22b are arranged alternately so as to match the peaks and valleys of the shape of the cleat of the riser 4 when the demarcation comb is engaged. In addition, the end faces of the cleats 22a and 22b that are located on the footboard 2 side when the demarcation comb is engaged are provided with concave portions 25 corresponding to the convex portions 9 described above. The concave portions 25 abut against the convex portions 9 when the demarcation comb is engaged. The concave portions 25 are not provided on the end faces of all the cleats 22a and 22b, but are arranged in a certain specified pattern. The pattern in which the concave portions 25 are arranged is the same as the pattern in which the convex portions 9 are arranged. In addition, the end faces of the cleats 22a and 22b that are located on the footboard 2 side when the demarcation comb is engaged are inclined toward the front of the footboard 2, similar to the end faces 2a described above.

According to this embodiment, the convex portion 9 on the end of the cleat of the tread 2 fits into the concave portion 25 on the end of the cleat of the demarcation comb, making it easy to select and position the type of demarcation comb. For example, if an attempt is made to attach a demarcation comb that has concave portions 25 arranged in a different pattern from the arrangement pattern of the convex portions 9, the convex portions 9 will interfere with the end faces of the cleat of the demarcation comb. This makes it possible to prevent incorrect assembly.

For example, if the fitting tolerance between the convex portion 9 and the concave portion 25 is set appropriately taking into account the positional accuracy of each cleat, there will be no step or misalignment between the cleat of the tread 2 and the cleat of the demarcation comb, and highly accurate positioning will be possible. The center of the hole 11 of the nut part 10 attached to the step body 1 will coincide with the center of the through hole 23 for inserting the bolt of the demarcation comb, allowing for easy insertion and engagement of the bolt.

As an example, a pair of pin-shaped portions 27 protruding vertically downward is provided on the bottom surface 26 of the base portion of the demarcation comb. The width of the pin-shaped portions 27 is, for example, about 1 mm to 2 mm. The length of the pin-shaped portions 27 is, for example, about 10 mm. The pin-shaped portions 27 are provided near the through-hole 23. Anti-slip portions 28 are formed at the tips of the pair of pin-shaped portions 27. The pitch between the outlines of the pair of pin-shaped portions 27 is set to be slightly narrower than the width of the long hole 6. The pitch between the outlines of the anti-slip portions 28 is set to be wider than the width of the long hole 6. The shape of the anti-slip portions 28 is a vertically split semicircular shape. This is done in consideration of ease of assembly, as described below.

Next, the engagement of the demarcation comb with the step body 1 according to the present disclosure will be described. FIG. 6 is a cross-sectional view of the assembled step when the demarcation comb is inserted. When the demarcation comb is inserted, the retaining portion 28 at the tip of the pin-shaped portion 27 first comes into contact with the step body 1. The pitch between the outer shapes of the retaining portion 28 is wider than the long hole 6, so it cannot be inserted as is. When force is applied from the top surface of the cleat of the demarcation comb, the pin-shaped portion 27 is inserted into the long hole 6 while elastically deforming inward as shown by the arrow in FIG. 6. Then, when the most protruding part of the semicircular retaining portion 28 passes through the long hole 6 and appears on the back surface of the step body 1, the deformation of the pin-shaped portion 27 returns to its original state, and the retaining portion 28 protrudes outward from the long hole 6. When the bottom surface 26 of the base of the demarcation comb comes into contact with the bottom surface of the recess 3 of the step body 1, the semicircular retaining portion 28 comes into point contact with the corner of the long hole 6 on the back side of the step 2, and the demarcation comb is held in place.

For example, a hook-shaped anti-slip shape will hold the demarcation comb more firmly, but it will be more difficult to replace. Also, for example, if multiple anti-slip shapes are provided on one demarcation comb, each anti-slip shape must be deformed simultaneously. If the anti-slip shape is semicircular, as in this embodiment, the demarcation comb can be removed upwards by the amount that the pitch of the pin-shaped portion 27 is shortened, making removal relatively easy.

In this embodiment, even in a situation where an impact force is applied by passengers or luggage, causing the demarcation comb to float up, or where the engaged bolt becomes loose due to vibrations generated when the passenger conveyor is in operation, the demarcation comb will not fall off because the retaining portion 28 of the pin-shaped portion 27 protrudes from the underside of the step.

Next, specific modified examples of the demarcation comb according to the present disclosure will be described. Figure 7 is a diagram showing the shape of the demarcation comb in a first modified example of the first embodiment. Figure 7 shows an overview of the overall shape of the demarcation comb and a cross section near the through hole 23 for inserting the engagement bolt. In this first modified example, a plate-shaped portion 29 that protrudes diagonally downward is provided on the bottom surface of the base. The thickness of the plate-shaped portion 29 is, for example, about 1 mm to 2 mm, the same as the width of the pin-shaped portion 27. The width of the plate-shaped portion 29 is set, for example, the same as the long hole 6 or about 1 mm smaller. The tip of the plate-shaped portion 29 is bent horizontally.

Figure 8 is a cross-sectional view showing a method of engaging the demarcation comb in a first modified example of the first embodiment. In this modified example, the demarcation comb is first placed at an angle, and the tip of the plate-shaped portion 29 is passed through the long hole 6. Then, when the plate-shaped portion 29 comes into contact with the U-shaped bent portion of the nut part 10 that has been attached beforehand, the demarcation comb is rotated in the direction of the arrow in Figure 8, with the contact position as the fulcrum. The plate-shaped portion 29 protrudes outward from the long hole 6 on the back surface of the step, and the position of the through hole 23 coincides with the hole 11 corresponding to the nut of the nut part 10. The demarcation comb is engaged by inserting the engagement bolt 30 into the through hole 23 and tightening it to the nut of the nut part 10.

According to this modified example, the plate-shaped portion 29, like the pin-shaped portion 27, can prevent the demarcation comb from falling off. For example, when an impact load is applied that lifts the demarcation comb obliquely upward, the cleat of the demarcation comb and the plate-shaped portion 29 get caught, and even if the plate-shaped portion 29 rotates around the tip of the plate-shaped portion 29 as a fulcrum, the end face of the cleat of the demarcation comb hits the end face 2a of the cleat of the step body 1, so the demarcation comb does not fall off. For example, even if the engagement bolt 30 falls off, the demarcation comb holds the end of the cleat of the step body 1, so it does not fall off. In addition, the plate-shaped portion 29 has higher rigidity than the pin-shaped portion 27, and a larger contact area with the nut part 10 is secured, so stress concentration is less likely to occur. The plate-shaped portion 29 is less likely to break than the pin-shaped portion 27.

Figure 9 is a diagram showing the shape of the demarcation comb in a second modified example of the first embodiment. Figure 9 shows the shape of the rear end of the step body 1 and the shape of the demarcation comb. In this modified example, a rib-like rib portion with notches 31 formed on both widthwise ends is provided on the bottom surface 26 of the base part of the demarcation comb. Meanwhile, a rib 32 is provided along the front and rear of the recess 3 on the step body 1 side. This rib 32 abuts against the notches 31 of the demarcation comb when engaged.

When the demarcation comb is engaged, the notch 31 fits into the rib 32, which helps prevent incorrect assembly. In addition, this modified example can effectively deal with misalignment in the rotational direction, which is difficult to deal with using only the convex portion 9 and the concave portion 25 described above.

Figure 10 is a schematic diagram of the demarcation comb and the step body in the third modified example of the first embodiment. Figure 11 is a cross-sectional view of the assembled step when the demarcation comb is inserted in the third modified example of the first embodiment. In this modified example, a rectangular recess 33 is provided on the top surface of the riser 4. A rectangular protrusion 34 protrudes from the back surface of the cleat on the mountain side of the demarcation comb. In addition, a rectangular plate-shaped portion 35 protrudes vertically downward from the bottom surface of the base portion between a pair of pin-shaped portions 27. The plate-shaped portion 35 protrudes to near the base of the pair of pin-shaped portions 27.

In this modified example, first, the pin-shaped portion 27 is inserted while elastically deforming inward, with the retaining portion 28 interfering with the long hole 6 of the step body 1. Then, the rectangular plate-shaped portion 35 comes into contact with the U-shaped bent portion of the nut part 10. After that, the rectangular protrusion 34 of the demarcation comb fits into the rectangular recess 33. The recess 33 and the protrusion 34 provide a positioning effect.

The plate-shaped portion 35 comes into contact with the U-shaped bent portion of the nut part 10, so that the position in the front-rear direction is also determined. The through hole 23 and the center of the screw hole of the nut of the nut part 10 are aligned, and the demarcation comb is engaged by inserting and fastening the engagement bolt 30. The projection 34 fits into the recess 33, preventing misalignment in the rotational direction.

In addition, in this modified example, each of the longer cleats of the demarcation comb fits into the recess 33. Even if an impact load is applied to the corner of the cleat, the load is applied from the protrusion 34 to the wall of the recess 33, preventing stress from concentrating at the base of the engagement bolt 30 or the retaining portion 28. With this modified example, an even greater stress dispersion effect can be obtained than with the second modified example described above.

1 Step body, 2 Step, 2a End surface, 3 Recess, 3a Flat surface, 4 Riser, 5 Top surface, 6 Long hole, 7 Rib-shaped portion, 8 Groove, 9 Convex-shaped portion, 10 Nut part, 11 Hole, 12 Fixed mold side cavity, 13 Movable mold side cavity, 14 Gap, 14a Mold part, 15 Ejector pin, 16 Mold part, 17 Mold part, 18 Mold part, 19 Mold part, 20 Mold part, 21 Wall surface, 22a Cleat, 22b Cleat, 23 Through hole, 24 Counterbore, 25 Concave-shaped portion, 26 Bottom surface, 27 Pin-shaped portion, 28 Anti-slip portion, 29 Plate-shaped portion, 30 Engagement bolt, 31 Notch, 32 Rib, 33 Recess, 34 Convex, 35 Plate-shaped portion, 101 Chain, 102 Shaft, 103 Gear, 104 Motor, 105 Gear, 106 Step, 107 Step, 108 Riser, 109 Bracket

Claims (7)

A die-cast passenger conveyor step body having a demarcation engaged at a rear end of the step,
The end portion is formed with a recess into which a demarcation can be attached,
The bottom surface of the recess has a long hole for mounting a plate-shaped nut part for engaging the demarcation, a groove into which the nut part is fitted, and a pair of rib-shaped parts for guiding the nut part. The groove is formed between the pair of rib-shaped parts.
The width of the long hole is larger than the pitch between the outer sides of the pair of rib-shaped portions,
The rear end surface of the cleat of the footboard is inclined toward the front of the footboard with respect to the bottom surface of the recess,
A passenger conveyor step body having a plurality of convex portions arranged in a specified pattern on the end surface. A die-cast passenger conveyor step body having a demarcation engaged at a rear end of the step,
The end portion is formed with a recess into which a demarcation can be attached,
The bottom surface of the recess has a long hole for mounting a plate-shaped nut part for engaging the demarcation, and a groove into which the nut part is fitted.
is formed,
The groove is formed as a flat portion that is one step lower than a periphery of the groove in the bottom surface portion,
The width of the slot is greater than the width of the groove,
The rear end surface of the cleat of the footboard is inclined toward the front of the footboard with respect to the bottom surface of the recess,
A passenger conveyor step body, the end surface of which is provided with a plurality of convex portions arranged in a specified pattern. A demarcation comb engaged with a rear end of the step plate of the step body of the passenger conveyor according to claim 1 or 2,
A base portion having a through hole through which an engagement bolt that engages with the nut part is inserted;
A demarcation comb cleat protruding above an upper surface of the base portion;
Equipped with
A demarcation comb having concave portions that abut the convex portions arranged in the specified pattern on the end surface of the demarcation comb cleat on the tread side. A pair of pin-shaped portions protruding downward is provided on a bottom surface of the base portion,
A vertically split semicircular retaining portion is formed at the tip of the pin-shaped portion,
The demarcation comb according to claim 3 , wherein when the pin-shaped portion is inserted into the long hole, the retaining portion protrudes from the rear surface of the footboard. A plate-shaped portion having a curved tip portion protruding obliquely downward is provided on a bottom surface of the base portion,
The demarcation comb according to claim 3, wherein when the plate-shaped portion is inserted into the long hole, a tip of the plate-shaped portion protrudes beyond the rear surface of the footboard. A step body of a passenger conveyor according to claim 1 or 2;
The demarcation comb according to claim 3;
Equipped with
A rib is provided along the front and rear of the bottom surface of the recess,
A passenger conveyor step having a notch on the bottom surface of the base portion that abuts against the rib. A step body of a passenger conveyor according to claim 1 or 2;
The demarcation comb according to claim 3;
Equipped with
The step body has a riser having a recess on an upper surface thereof,
The demarcation comb is a passenger conveyor step having a protrusion that fits into the recess provided on the upper surface of the riser.

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