JPS636473B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of forming a handrail for a passenger conveyor such as an escalator or an electric road, and particularly to a method for forming a handrail at a terminal portion where a handrail is reversed.

[Conventional technology]

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

Here, the railing of the passenger conveyor excludes rotating bodies such as the step 1 and handrail 2, which are arranged in an endless manner and rotate to carry passengers, as shown in part near the entrance and exit in Figure 1. It is already well known that the main components are designed bodies such as the main deck 3, the lower deck 4, and the panel 5 that support the handrail 2. be. And these main decks 3,
The design bodies such as the lower deck 4 and the panel 5 have the function of supporting the passengers riding on the step 1 from the side.
Further, along with skirt cards 6 provided to protect the feet of passengers riding on the step 1, they are disposed continuously up to the vicinity of the boarding and alighting floors 7 that form both ends of the passenger conveyor in the longitudinal direction.

Conventionally, aluminum alloys with chemically treated surfaces have been widely used as materials for the above-mentioned balustrade designs, but recently aluminum alloys have been used that have significantly superior corrosion resistance and surface hardness (compared to aluminum). Stainless steel plates are increasingly being applied to parapet members. In particular, this stainless steel handrail has been well-received in subway stations, etc., which are subject to harsh usage 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 parapet member made of stainless steel plate,
In particular, the structure of the three main deck parts has the following drawbacks, which prevent it from becoming widespread.

In other words, the end of the railing where the passenger conveyor handrail 2 is reversed (hereinafter referred to as the terminal part)
The main deck 3 is equipped with a pulley 8 for reversing the running of the handrail 2.
Inner deck 9 on step 1 side and outer deck 10 on the outside
The structure is divided into two parts. The inner deck 9 is most commonly formed in a substantially semicircular shape with a step W from the part near the handrail 2 to the part near the step 1 at the terminal part where the pulley 8 is located. . In this case, it is a well-known fact that the panel 5 is installed obliquely from the handrail 2 toward the step 1 side, as it can be seen here and there on passenger conveyors and the like in general station ditches.

To further explain the structure of the inner deck 9 using a conventional stainless steel plate, as shown in FIGS. 3 to 6, the width near the handrail 2 shown in FIG. If the width of the side is Wc, the cross section of each part is as shown in Figures 4 to 6. In this case, the cross section along the - line in Figure 3 is as shown in Figure 4, the cross section along the - line is as shown in Figure 5, and the cross section along the line is as shown in Figure 6, and the width of each cross section is Wa, respectively. It looks like Wb, Wc. The actual dimensions of a general passenger conveyor are Wa = 50 to 100 mm, Wb = 100
~150mm, Wc = about 150-200mm. As can be seen from this sectional view, the inner deck 9 has three pieces: a rising piece 9a that enters inside the handrail 2, a flat deck piece 9b, and an inner piece 9c that covers the end of the panel 5.

[Problem that the invention seeks to solve]

By the way, stainless steel material is hard and has poor workability. Therefore, when forming the inner deck 9 having the three pieces, each of the three pieces is formed independently, and then they are joined with a weld bead 9d. Only the Z section where the bead 9d appears on the surface is ground to a smooth finish as shown in FIG. That is, as shown in FIG. 8, the inner deck 9 gradually becomes wider from the upper width Wa toward the lower part, and reaches the width Wc (Wa<Wc) on the step 1 side.
A rising piece 9a and an inner piece 9c are curved or formed in a substantially semicircular shape with the deck piece 9b as a central member.
are joined together to form a single piece.

However, in the above structure using each piece of stainless steel, 1. When the three members forming the inner deck 9 are welded, each member becomes discolored or significantly deformed by the welding heat.

2. The weld bead 9d itself is exposed in the Z section (shown in FIG. 7), and the design is inferior to other stainless steel plate sections in terms of color tone and gloss.

3. It takes a lot of effort to finish the Z part, and the quality is not stable because the quality of the workmanship is affected by the quality of the manufacturing technology.

4. In order to bend each of the three members to the same curvature and form them into a single piece, sophisticated processing technology and equipment are required, leading to an increase in manufacturing costs.

These drawbacks prevented the widespread use of stainless steel balustrades.

An object of the present invention is to provide a method for forming a balustrade made of stainless steel plate, which improves the above-mentioned drawbacks and has good design and productivity.

[Means for solving problems]

In order to achieve the above object, the present invention bends the inner deck of the terminal part where the handrail is reversed in opposite directions on both sides of the width direction of a single stainless steel plate that becomes wider from the top to the bottom. A step of forming an L-shaped rising piece and an inner piece, and a step of pressing the inner circumferential surface of the stainless steel plate, using the inner piece as the inner side of the bending part, and bending it while applying tension to both ends in the longitudinal direction. It was designed to be molded using the following methods.

[Effect]

According to the above-mentioned forming method, it is possible to bend the upright part and the inner part bent into an L-shape without causing any deformation due to bending, and as a result, no welding is required, resulting in an excellent design. It is possible to obtain an inner deck made of stainless steel plate with high productivity.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 9 to 17. The configuration of the step 1, handrail 2, panel 5, etc. is completely the same as the conventional one, so illustration can be omitted. It is unique in that it has a 11-piece inner deck. In this case, the cross sections along the - line, XI-XI line, and XII-XII line in Figure 9 are shown in Figure 10 and 1, respectively.
As shown in Figures 1 and 12, the finished shape has the same horizontal widths Wd (conventional Wa), We (conventional Wb), and Wf (conventional Wc), and the inside of the handrail 2. The rising piece 11a (conventional 9
a) It also has a flat deck piece 11b (conventional 9b) and an inner side piece 11c (conventional 9b) that covers the panel 5. As in the past, it is curved into a substantially semicircular shape to form the terminal portion of the balustrade.

Here, to explain the manufacturing method of the inner deck 11, first of all, the width corresponding to the developed lengths l ₁ , l ₂ and l ₃ in each cross section shown in FIGS. 10 to 12, that is, from the top to the bottom. As shown in FIG. 13, a flat plate 12 is cut from the stainless steel plate so that it becomes wider in the opposite direction. At this time, inner deck 11
As shown by the arrow in FIG. 9, the shape is similar to that of a substantially semicircular shape turned back into a flat plate. Therefore, the approximately semicircular portion draws a gentle curve as shown in section Y in FIG. 13, and has the developed lengths l ₁ , l ₂ and l ₃ shown in FIGS. 13 and 15, respectively. Like L ₁ ,
It has a width of L ₂ and L ₃ . Next, flat plate 1
The above-mentioned rising piece 11a, decking piece 11b, and inner piece 11c are formed on 2 to form the shape as shown in FIGS. 14 and 16. At this time, it goes without saying that the widths Wd, We, and Wf explained in FIGS. 10 to 12 are formed. Further, the processing in this case is comparatively simple by drawing processing using a press machine that applies pressure to the flat plate 12 from directions X ₁ and X ₂ in FIG. 16.

Furthermore, for the material processed in Figures 13 to 16, a tensile force Q is applied to both ends as shown in Figure 17.
Then, while applying a pressing force P to the inner circumferential surface, it is curved into a substantially semicircular shape.

By bending while applying the tensile force Q and the pressing force P, deformation (wrinkles) that is about to occur in the rising piece 11a and the inner piece 11c that protrude from both widthwise ends of the deck piece 11b at almost right angles can be prevented. It will no longer occur. That is, if the flat plate 12 as shown in FIG. 16 is simply curved,
Since the center of bending is the deck piece 11b, the rising piece 11a naturally receives tensile force, and the inner piece 11
c is subjected to compressive force. As a result, the inner piece 11c
There is a problem in that the inner edge of the railing is undulated and wrinkled along the longitudinal direction, creating a gap between the panel and the panel that makes up the balustrade. However, by bending the tensile force Q while applying the pressing force P, the center of bending moves toward the inner piece 11c.
The compressive force generated in this case becomes smaller and deformation no longer occurs.

Since the inner deck 11 can be formed from a single stainless steel plate by the above method, (1) there is no thermal deformation due to welding heat;

(2) Since it is a single stainless steel plate, there is no unevenness in color tone or gloss due to dissimilar materials or welding heat.

(3) Since the bending work can be performed by a machine while applying the above-mentioned tensile force Q and pressing force P, quality is stabilized and productivity is improved.

There are advantages such as

In the above description, the cross-sectional shape of the inner deck 11 is composed of three surfaces: the rising piece 11a, the deck piece 11b, and the inner piece 11c, but it is not necessarily limited to this shape, and can be changed as necessary. As shown in FIG. 18, the inner end of the inner piece 11c may be provided with a bottom surface 11e that is substantially parallel to the decking piece 11b so that there are four sides.

Further, the shape of the terminal portion is not limited to a substantially semicircular shape, but may be configured by a combination of multiple circular arcs.

〔Effect of the invention〕

According to the present invention described above, it is possible to obtain a balustrade made of stainless steel plate with excellent design and productivity.

[Brief explanation of the drawing]

Figure 1 is a side view showing a part of the passenger conveyor entrance, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a perspective view of the inner deck 3, and Figure 4 is A sectional view along the - line in Figure 3, Figure 5 is a cross-sectional view along the - line in Figure 3.
Figure 6 is a cross-sectional view taken along the - line in Figure 3, Figure 7 is an enlarged cross-sectional view of the part in Figure 4, explaining the finished state, and Figure 8 is a cross-sectional view taken along the - line in Figure 3. 3 is an exploded perspective view of FIG. 3, FIG. 9 is a perspective view showing an inner deck according to an embodiment of the present invention, FIG. 10 is a sectional view taken along the - line of FIG. 9, and FIG. 11 is a perspective view of FIG. 12 is a sectional view taken along line XII-XII of FIG. 9, FIG. 13 is a plan view of the parts in FIG. 9 developed into a flat plate, and FIG. Fig. 15 is a side view taken along the - line in Fig. 13, Fig. 16 is a side view taken along the - line in Fig. 15, and Fig. 17 is a side view of Fig. 9 with additional processing means added. FIG. 18 is a sectional view showing another embodiment of the present invention. 1...Step, 2...Handrail, 3...
Main deck, 5...Panel, 10...Outer deck, 1
1...Inner deck, 11a...Rising piece, 11b
...Deck piece, 11c...Inner piece, 12...
flat plate.

Claims (1)

[Claims] 1. A passenger conveyor railing equipped with a plurality of steps arranged in an endless manner and a handrail that rotates synchronously on the periphery, and a main deck consisting of an inner deck and an outer deck separated by the handrail. , the inner deck located at the terminal portion where the handrail is reversed is bent in opposite directions on both sides of a stainless steel plate formed so that the width becomes wider from the top to the bottom. A step of forming a letter-shaped rising piece and an inner piece, and a step of pressing the inner circumferential surface of the stainless steel plate with the inner piece as the inner side of the bending and bending while applying tension to both ends in the longitudinal direction. A method of forming a passenger conveyor railing characterized by forming it.