JPS5839757B2 - Manufacturing method for passenger conveyor railings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a railing for a passenger conveyor such as an escalator or an electric road, and more particularly to a method of manufacturing a main deck of a terminal portion thereof.

Passenger conveyors have become widely established as essential service equipment in buildings, but recently there have been a wide variety of demands, especially in terms of the design of the handrails.

As is well known, the railing makes up the majority of the design of a passenger conveyor, and its design is a major selling point as it determines the quality of interior decoration.

As shown in Figure 1, which shows a part of the passenger conveyor near the entrance, the passenger conveyor is very large except for rotating parts such as steps 1 and handrails 2, which are arranged in an endless manner and rotate to carry passengers. The main components are the main deck 3, the bottom deck 4, and the panel 5 of the handrail that supports the handrail 2.

These main deck 3, lower deck 4 and panel 5
This design has the function of supporting the passengers riding on Step 1 from the side, and also has a skirt guard 6 installed to protect the feet of passengers riding on Step 1. They are arranged continuously up to the vicinity of the boarding and alighting floors 7 that form the squadron.

Up until now, the material for the above-mentioned balustrade design body has been widely used aluminum alloy with chemically treated surface, but recently stainless steel, which has much better corrosion resistance and surface hardness than aluminum alloy, has been widely used. Steel plates are becoming more and more popular.

In particular, this stainless steel railing has been well-received in subway stations, which are subject to harsh operating environments such as heavy usage and corrosion due to the influence of underground water, and there is a desire for its widespread use. .

However, the structure of the stainless steel railing members, especially the three main deck parts, has the following drawbacks, which prevents it from becoming widespread.

In other words, the main deck 3 at the end of the railing of the passenger conveyor (hereinafter referred to as the terminal section) is connected to the main deck 3 on the step 1 side because the pulley 8 for reversing the running of the handrail 2 is provided. It is divided into outer decks 9.

Then, this main deck 3 is connected to the step 1 from the part near the handrail 2 at the terminal part where the pulley 8 is located.
Most commonly, it is formed into a substantially semicircular shape with a step W up to a portion close to , or a continuous shape of a plurality of circular arcs with different curvatures.

In this case, the panel 5 is attached so as to be inclined from the handrail 2 toward the step 1 side.

The structure of the main deck 3 using conventional stainless steel plate was changed to the third one.
To explain in detail with reference to FIGS. 6 to 6, the width near the handrail 2 shown in FIG. 2 is Wa, and the width on the step 1 side is W.

When closed, the cross section along the line ■-■ in Figure 3 is as shown in Figure 4, ■
The cross section along line -■ is shown in Figure 5, and the cross section along line IV-IV is shown in Figure 6, and the width of each cross section is W.
a.

It looks like Wb, Wo.

The actual dimensions of a general passenger conveyor are Wa=50~1
00 mm, Wb=100 to 150 mm, and Wo=150 to 20 mm.

As seen in this cross-sectional view, the main deck 3 has three members: an outer rising piece 3a that goes inside the handrail 2, a flat deck center piece 3b, and an inner falling piece 3c that covers the end of the panel 5. The most common method is to join them together with a weld bead 3d, and to have a smooth finish by cutting off only the two parts where the weld bead 3d is exposed as shown in FIG.

Therefore, as shown in FIG. 8, the main deck 3 gradually becomes wider from the width Wa to the width W on the step 1 side.

The deck center piece 3b with (Wa>Wo) is used as the central member, and the outer rising pieces 3a and the inner rising pieces 3c are respectively joined to both sides of the central piece 3b, so that it has a form as if it were a single body.

Regarding the method of manufacturing the deck center piece 3b, it is manufactured as shown in FIGS. 9 and 10.

In other words, the required maximum board width (W
A plate material 3e having a width Wx of 0 or more) is applied to a bending mold S1, and a tensile force Q is applied to both ends of the plate material 3e so as to wrap around it.

In this case, since a bent surface S2 with a predetermined curvature R is formed on the outer periphery of the mold S1, the plate material 3e is
It can be bent along 2.

In the next step, the plate material 3e formed with a predetermined curvature (approximately semicircular in the illustrated example) is shaved off by cutting means such as a milling machine to remove the shaded area in FIG.
As a result, the narrow part (width Wa) and the wide part (width Wo)
The deck center piece 3b having the following is formed.

In this way, the deck center piece 3b is manufactured by bending and cutting, and then the outer rising piece 3a is manufactured by bending and cutting.
The inner falling pieces 3c are joined together by welding or other joining means as described above, and the main deck 3 is formed to have an appearance as shown in FIG. 3.

However, in the main deck formed in this way, (1) when the three members forming the main deck 3 are welded, each member becomes discolored or significantly deformed by the welding heat.

(2) Weld bead 3d in the second part (shown in Figure 7)
The stainless steel plate itself is exposed, and the design is inferior to other stainless steel plate parts in terms of color tone and gloss.

(3) A great deal of effort is required to finish the second part, and the quality of the finished product is not stable, as the quality of the production technology is affected.

(4) Advanced bending and cutting techniques and equipment are required to bend the three members to the same curvature and form them into a form with a single height, leading to an increase in manufacturing costs.

It has fatal flaws both in terms of design and as a mass-produced product, and a solution to these problems has long been sought.

An object of the present invention is to provide a method for manufacturing a railing for a passenger conveyor, which eliminates the drawbacks of the above-mentioned technical techniques and improves the design and productivity of a main deck made of stainless steel plates.

In order to achieve this object, the present invention forms a main deck made of stainless steel plate by bending at least the central part of the deck and the inner falling part, and then converts the central part of the deck of the same height into a mold. Apply a small tensile force to the narrow end of the board at the center of the deck, and hold the wide end of the board where the width changes in close contact with the curved part of the mold. It is characterized in that the integral height is curved in its longitudinal direction by applying a large tensile force.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In this example, FIG. 11, the ■-■ line in FIG.
As shown in FIGS. 12 to 14, which are cross-sectional views taken along the VI line and the By performing processing, the conventional outer rising piece 3a
an outer rising portion 10a1 corresponding to the conventional deck center piece 3b; an inner falling portion 10c corresponding to the conventional inner falling piece 3c;
Manufactured so that it becomes an integrated product.

Here, the width in each cross section of the deck central portion 10b is
Wd equivalent to conventional Wa, We equivalent to conventional Wb
1 Conventional W.

It has Wf corresponding to . Note that the other configurations of the step 1, the handrail 2, the panel 5, etc. are completely the same as those of the conventional example shown in FIGS. 1 and 2, so their explanation will be omitted here.

Next, a specific method of manufacturing the main deck 10 as described above will be explained.

First, a flat plate 10d having a shape as shown in FIGS. 15 and 16 is cut.

In other words, this flat plate 10d has a substantially semicircular shape extended into a completely flat plate shape as shown by the arrow in FIG.
The portion corresponding to C draws a gentle curve like the Y portion, and has a width Ll j L2 corresponding to the developed length 6□, e2, and e3 in each cross-sectional view shown in FIGS. 12 to 14. and L3.

Next, the outer rising portion 10a1, the deck center portion 10b, and the inner falling portion 10c are shaped from the flat plate 10d to form an intermediate processed material 10e having a shape as shown in FIGS. 17 and 18.

At this time, the widths Wd, We, and Wf shown in the cross-sectional views of FIGS. 12 to 14 are formed.

The forming process in this case can be carried out relatively easily by drawing process using a press machine that applies pressure to the flat plate 10d from the X1 and X2 directions shown in FIG. 18.

Further, as shown in FIG. 19, the intermediate processed material 10e shown in FIGS. 17 and 18 has a tensile force Q1 at both ends. Q2 is applied, and a pressing force P is applied to the inner peripheral surface.
Form into a roughly semicircular shape by applying .

As this molding method, a completely new method is adopted here.

That is, after being processed to the state shown in FIGS. 17 and 18, this intermediate processed material 10e is fitted into the forming groove S4 of the forming mold S3 as shown in FIG. 20, and the curved surface S5 ( curvature R1).

In this case, the smaller cross-sectional area of the intermediate processing material 10e is
The larger cross-sectional area of 0X1 is 10Y, and the same tensile forces Q1 and Q2 (
Ql = Q2), as shown in part M in Figure 21,
The 10X part, which has a small cross-sectional area, stretches too much and contracts, making it thinner.

This can be fully proven theoretically, and is a very common phenomenon in which the side with a smaller cross-sectional area is defeated by the side with a larger cross-sectional area and breaks first.

Therefore, in this new molding method, Fig. 20 and 2
As shown in FIG. 2, a pressing force F is applied to the outer surface of the portion where the cross-sectional area changes in the intermediate processed material 10e located approximately at the center of the circumference of the mold S3, that is, the portion where the width changes of the deck central portion 10b. is applied, and this part is kept in close contact with and stationary so as not to move to the approximate center of the circumference of the mold S3, and in this state, a tensile force Q2 is applied to the 10Y side, which has a larger cross-sectional area.

At this time, the tensile force Q2 is a value suitable for the cross-sectional area formed by the width Wf (assumed to be Zl here), for example, 20 Kp.
/77!71! is set to .

In this way, the 10Y side is bent to the final curvature as shown in FIG.

Next, the tensile force Q2 in FIG. 23 is stopped or released, and then the bending process on the 10X side is started.

In this case, the tensile force Q is set to a value suitable for the cross-sectional area formed by the width Wd (assumed to be Z2 here), for example, 10
Kt/77X71! Set to .

Then, a pressing force F is applied to the portion of the deck central portion 10b whose width changes, and this portion remains stationary in close contact with approximately the center of the circumferential portion of the mold S3 until it reaches a predetermined curvature. It is molded by applying a tensile force Q1.

In this forming method, when the intermediate processed material 10e having a long and irregular cross section is bent by tensile force, a pressing force F is applied to the portion where the cross-sectional area changes, and this portion is bent into the mold S3.
By keeping it stationary in close contact with the circumferential part of
Since it is divided so that it does not extend to 1>Z2), the concern that a contraction state as shown in FIG. 21 will occur is completely eliminated.

In the manner described above, the main deck 10 is formed from a flat plate to a final approximately semicircular shape.

According to the present embodiment described above, (1) Since it is a one-piece product with no welded parts, there is no fear of thermal deformation or the like.

(2) There is no significant difference in color tone or gloss on any part of the surface.

(3) Since the form eliminates manual processing such as drawing and bending, the quality is stable and there is no shrinkage caused by bending.

Benefits such as:

In addition to the above-mentioned embodiments, the present invention can also achieve its purpose with the following modifications.

In terms of cross-sectional bending, for example, as shown in Figure 24,
The outer rising portion 10a1, the deck central portion 10b1, and the inner falling portion 10c may be formed integrally with four additional protrusions 10f by bending.

Furthermore, as shown in FIG. 25, the deck central portion 10b and the inner falling portion 10c may be formed integrally by bending, and only the outer rising piece 10g may be constructed separately and joined by welding or the like.

On the other hand, in terms of bending in the longitudinal direction, instead of applying the pressing force F intentionally, for example, in the center of the mold S3 in FIG. A portion N having a high friction coefficient is provided so that the mold S3 and the intermediate material 10e come into close contact with each other to prevent slipping between them, and a tensile force Q2 is applied to the intermediate material 10e.
When applied, consideration may be given so that the tensile force Q2 does not reach the part with a small cross-sectional area at the other end.

As explained above, according to the present invention, at least the central part of the deck and the inner falling part constituting the main deck made of stainless steel plate are integrally formed by bending, and then the central part of the deck with the integral height is placed in the mold. Apply a small tensile force to the narrow end of the board at the center of the deck, and hold the wide end of the board where the width changes in close contact with the curved part of the mold. By applying a large tensile force,
Since the integral height is curved in its longitudinal direction, there is no welded part unlike the conventional one, at least in the part that appears on the surface.
In other words, it is possible to obtain a main deck made of stainless steel plate that is free from thermal deformation and has excellent color tone and gloss.Also, since the above-mentioned two parts such as finishing are not required, it is easy to manufacture and its quality is stable. .

As a result, the design and productivity of the stainless steel plate main deck can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a part of the passenger conveyor entrance, Fig. 2 is a sectional view taken along line I-I in Fig. 1, Fig. 3 is a perspective view of a conventional main deck, and Fig. 4 is a perspective view of a conventional main deck. The figure is a sectional view taken along line ■-■ in Fig. 3, Fig. 5 is a sectional view taken along line I-1 in Fig. 3, Fig. 6 is a sectional view taken along line TV-TV in Fig. 3, and Fig. 6 is a sectional view taken along line I-1 in Fig. 3. FIG. 7 is an enlarged sectional view of FIG. 4, FIG. 8 is an exploded perspective view of the main deck, FIG. 9 is a perspective view showing the molded state of the main deck, and FIG. 10 is a perspective view showing the processed state of the main deck. Fig. 11 is a perspective view of a main deck manufactured by an embodiment of the present invention, which corresponds to the conventional Fig. 3, Fig. 12 is a sectional view taken along the line ■-■ in Fig. 11, and Fig. 13 is a Figure 14 is a cross-sectional view taken along line ■■ in Figure 11, Figure 15 is a flat plate showing the main deck in Figure 11 in its longitudinal direction and cross-sectional shape. Fig. 16 is a side view taken along the line ■-■ in Fig. 15, Fig. 17 is a plan view of the intermediate processed material 0 obtained by processing the flat plate in Fig. 15, and Fig. 18 is a side view taken along the line ■-■ in Fig. 17. A side view along the line, FIG. 19 is a side view of the main deck in FIG. 11 seen from the side, FIG. 20 is a perspective view showing the molded state of the main deck,
FIG. 21 is a plan view illustrating the state of the main deck during molding;
FIGS. 22 and 23 are plan views illustrating the bending process of the main deck, and FIGS. 24 and 25 are sectional views of main decks manufactured in other embodiments of the present invention. 1...Step, 2...Handrail, 5...Panel, 9...Outside deck, 1
0...Main deck, 10a...Outer rising part, 10b...Central part of deck, 10c.
...Inner falling part.

Claims (1)

[Scope of Claims] 1. It is arranged between steps that are arranged in an endless manner and rotate and a handrail that rotates synchronously with the steps, and the terminal portions at both ends in the longitudinal direction are curved. The main deck of the terminal portion has an unequal plate width that gradually becomes wider from one narrow end to the other wide end. In a method for manufacturing a railing for a passenger conveyor, which is composed of a central part of a deck made of a stainless steel plate, and inner falling parts and outer rising parts provided on both sides of the central part of the deck, at least the central part of the deck and the inner falling parts are provided on both sides of the central part of the deck. After forming the parts into one piece by bending, the central part of this one-piece deck is placed against the curved part of the mold, and a small tensile force is applied to the narrow end of the central part of the deck, causing the wide end of the board to bend. A man conveyor characterized in that the single body weight is curved in its longitudinal direction by applying a large tensile force to the portion where the plate width changes while the portion where the plate width changes remains in close contact with the curved portion of the mold. A method of manufacturing a parapet. 2. A method of manufacturing a railing for a passenger conveyor according to claim 1, characterized in that the outer rising portion is also formed integrally with the central portion of the deck and the inner falling portion by bending.