JPH0747583A - Device for making hand belt for passenger conveyor - Google Patents

Abstract

PURPOSE:To efficiently manufacture a hand belt having excellent quality by providing extruders for extruding rubber materials corresponding to rubber layers by connecting them to a single head when two decorative rubber layers are to be formed on a core body having a nearly C-shaped sectional face. CONSTITUTION:After ducks which are pinching a steel wire are layered and aligned, it is bent into nearly a U-shaped sectional face at a core body molding section and molded into a nearly C-shaped sectional face so as to mold a core body 4. The core body 4 molded in this way is sent to a decorative rubber layer molding section. When it passes through a through hole 23 of an extruder head, rubber materials 51a and 52b are respectively sent out from extruders 19a and 19b. The rubber materials are made to pass through sectorial parts 21d and 21f of rubber supply passages 21a and 21b so as to be extruded from an extruding end 20d covering the outer periphery of the core body 4, extruded uniformly through thin parts 201a and 202a without mixing air on the core body 4, and are layered. Thereafter, the decorative rubber layer is taken up on a take-up section in an unvulcanized state and adhered with vulcanization at a heating and pressing device in other process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for a passenger conveyor handbelt such as an escalator and an auto line, and particularly efficiently manufactures a passenger conveyor handbelt in which a decorative rubber layer is formed of two rubber layers. The present invention relates to an apparatus for manufacturing a hand belt for a passenger conveyor.

[0002]

2. Description of the Related Art Conventionally, there is a passenger conveyor such as an escalator or an automatic line that moves passengers by placing them on steps. The passenger conveyor moves endlessly with the step of placing and moving the passenger, and is provided with a handrail or hand belt for gripping the passenger without losing balance.

As shown in FIG. 6, the hand belt 1 is formed by laminating a plurality of canvases 2 and is formed into a substantially C-shaped cross section, and is provided with a plurality of steel wires or the like between the layers of the canvas 2 for reinforcement. A decorative rubber layer 5 is laminated on a core body 4 in which a tension member 3 is sandwiched to improve durability, and has a good appearance, and is sandwiched by a drive roller or the like which is endlessly driven to rotate. It is installed and used.

In addition, the passenger conveyor thus installed is stopped at night, and at such a time, the layer having elasticity such that creep does not occur in the portion sandwiched by the driving rollers for a long time and the surface are covered. Some have a decorative rubber layer formed in a two-layer structure of a layer having a coloring property that can be colored in a desired color. In order to manufacture such a passenger conveyor hand belt, the tension member 3 is sandwiched and the canvas is laminated to form a core body 4 having a substantially C-shaped cross section. On the other hand, in order to form the decorative rubber layer in a separate step, the rubber material is formed into an unvulcanized decorative rubber material in a belt shape or a substantially C-shaped cross section. Then, an unvulcanized rubber material is placed on the core body 4 and placed in a mold (not shown), and heated and pressure-bonded for vulcanization to integrally form the core body 4 and the decorative rubber layer 5. It is formed by converting.

[0005]

However, since the unvulcanized decorative rubber material is formed in a step different from the step of forming the core,
The work of placing the belt-shaped or substantially C-shaped rubber material in cross section on the core body 4 has to be performed manually. For this reason,
There is a limit to the manufacturing efficiency, and there is a possibility of deviation from the normal position, resulting in poor yield. Moreover, since the processing time is long, the canvas absorbs water, which may lead to a decrease in adhesive strength (reduction in durability), discoloration or deterioration.

When the decorative rubber material is placed on the core body and conveyed to the heat vulcanizing device (mold), the core body 4 and the decorative rubber material are adhered to each other in advance by the rubber-based rubber. An adhesive is used, but if the temperature is low, the adhesive strength will be insufficient and peeling will occur.
It was necessary to perform processing such as taping the outer periphery with plastic tape and leaving it for several hours, which increased the number of steps and resulted in poor efficiency and cost.

When the decorative rubber material is formed into a strip,
In particular, when the decorative rubber layer has a two-layer structure, even when taping, there is a drawback that a step is formed in the curved portion, air is mixed in during vulcanization, or a missing portion of the rubber material is likely to occur. It was For this reason, there has been a method of directly extruding a rubber material on a core body having a substantially C-shaped cross section to form a hand belt for a passenger conveyor. However, in such a case, as shown in FIG. 7, two extruders 6a and 6b are provided according to each rubber material, and each rubber material supplied from the extruders 6a and 6b is sequentially cored from the heads 7a and 7b. When extruded onto the body 4, uneven thickness may occur or the lower layer 5a may be exposed if the two layers are not extruded to the predetermined positions of the core body 4, respectively. Further, the upper layer 5b is formed on the rubber material of the lower layer 5a.
The rubber head of the upper layer 5b for extruding the rubber material of
The head 7b must be installed with a gap d so that the molten rubber does not adhere to the lower layer 5a by contacting the lower layer 5a. Therefore, there is a drawback that it is difficult to overlap the lower layer 5a and the upper layer 5b, and that air is easily mixed.

In order to solve the above drawbacks, an object of the present invention is to provide an apparatus for manufacturing a handbelt for a passenger conveyor, which can efficiently manufacture a good quality handbelt.

[0009]

In order to achieve the above object, a manufacturing apparatus for a hand belt for a passenger conveyor according to the present invention comprises a core body of a laminated body of canvas having a substantially C-shaped cross section, and a laminated body on the core body. In a manufacturing apparatus for a hand belt for a passenger conveyor, which comprises a plurality of decorative rubber layers, a plurality of extruders for respectively extruding a rubber material forming a multilayer decorative rubber layer are provided, and a plurality of extruders are connected to each other. The head is provided.

[0010]

When forming two layers of decorative rubber layers on a core body having a substantially C-shaped cross section, an extruder for extruding a rubber material corresponding to each rubber layer is connected to one head. The head is provided with a supply path having a substantially C-shaped cross section for each rubber material in order to extrude each rubber material to the outer periphery of the core body, and each rubber material extruded from the supply path having a substantially C-shaped cross section is The outer circumference of the core is covered almost at the same time. The decorative rubber material extruded from the supply path is not displaced with respect to the core body and is not sent. Like this, 2
Since the decorative rubber layer of the layer can be integrally formed with the core body by directly extruding the rubber material onto the core body, it can be manufactured efficiently, there is no air mixing, and there is no quality variation, and the yield is high. Can be manufactured well.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment to which a manufacturing apparatus for a hand belt for a passenger conveyor according to the present invention is applied will be described with reference to the drawings. Manufacturing apparatus S for the hand belt 10 for passenger conveyor shown in FIG.
Is a hand belt 10 for a passenger conveyor having a two-layered decorative rubber layer 50 including a lower layer 51 and an upper layer 52 shown in FIG.
Is a device for manufacturing. The canvas 2 and the tension member 3 forming the core body 4 are manufactured in the same shape as that shown in FIG.

The manufacturing apparatus S for the passenger conveyor hand belt 10 includes a plurality of canvases 2 which are preliminarily impregnated with a rubber adhesive.
The steel wire 3 serving as a tension member is supplied to each of the parts, a core body molding part 9 for molding the canvas 2 interposing the steel wire 3 into a core body 4 having a substantially C-shaped cross section, and an extruder. The decorative rubber layer forming part 11 is provided. The supply unit 8 includes tension member supply units 13 corresponding to the number of the steel wires 3, and the steel wires 3 supplied from the respective tension member supply units 13
A parallel guide 14 having a grooved roller is provided for aligning the rollers. Further, the supply unit 8 is the canvas 2
The canvas supply units 15 corresponding to the number of laminated sheets are provided. The canvas supply unit 15 may be provided with an adhesive supply device (not shown) for applying an adhesive to the canvas 2 in order to bond the canvases 2 to each other as necessary. Furthermore, the canvas supply unit 1
A guide 16 for accurately stacking the plurality of canvases 2 supplied from 5 is provided.

The core body molding portion 9 for forming the canvas 2 having a substantially C-shaped cross section by being laminated with the steel wire 3 provided from the supply part 8 is first provided with a large number of rollers. It is provided with a preforming portion 91 that is formed in a V shape, and a main forming portion 92 that is formed by bending a bent portion from a substantially U-shaped section to form a substantially C-shaped section. The preforming section 91 is provided with rollers 91a that bend both edges of the canvas 2. Main forming part 92
As shown in FIG. 3, a flat roller 92a, a bending roller 92b, and a bending roller 92c are provided, and the canvas 2 laminated by air pressure, hydraulic pressure, or the like is pressed against the guide rail 17 having a substantially C-shaped cross section, and the cross sectional shape is reduced. It is designed to be molded from a U-shape to a substantially C-shape. The main forming section 92 is capable of reciprocating on the rail 18 laid in the traveling direction of the canvas itself, and molding the laminated canvas 2 while moving along with the traveling of the canvas into a substantially C-shaped cross section. The core body 4 is sequentially formed by returning to the position of the untreated canvas.

A decorative rubber layer molding section 12 is provided downstream of the core molding section 9. The decorative rubber layer molding portion 12 is provided by extending a guide rail 17 on which the core body 4 is placed,
Core body 4 formed on guide rail 17 in a substantially C-shaped cross section
The lower layer 51 and the upper layer 52 are simultaneously extruded on top to form a decorative rubber layer. As shown in FIG. 4, the core body molding portion 9 has a pre-kneaded unvulcanized rubber material 51a or 52b.
Two extruders 19a equipped with a screw for feeding
19b and one head 20 that pushes out the rubber materials 51a and 52b respectively sent from the extruders 19a and 19b onto the core body 4.

The head 20 is placed on the guide rail 17 and the introduction member 20a into which the core 4 is introduced, and the rubber material 51.
rubber supply paths 21a, 2 to which a and 52b are respectively supplied
Rubber supply members 20b and 20c for forming 1b,
It is composed of a push-out end 20d at the tip of the head. The introducing member 20a is provided with a through hole 22 for introducing the core body 4 from the right side in FIG. 3, and a sliding member 23 is attached around the through hole 22 so that the core body 4 can easily slide. Has been done. A groove for forming the rubber supply path 21a of the rubber material 51a is provided on the outer periphery of the introduction member 20a, and the rubber material 52b is formed.
Is provided in close contact with a rubber supply member 20b provided with a groove for forming the rubber supply passage 21b, and the rubber supply member 20b is closely adhered to a rubber supply member 20c fitted with extruders 19a and 19b. Is provided.

The rubber supply path 21a thus formed,
The extruding end 20d for extruding the rubber materials 51a and 52b, which are sent through the extruding member 21b, forms extruding opening members 201 and 202 forming the extruding opening of the rubber material 21a, and extruding opening members 202 and the extruding opening of the rubber material 21b. And the extrusion port member 203. The rubber supply path 21a is provided in the extrusion member 20.
As shown in FIG. 5 (cross section in FIG. 4A) by 1 and 202, a fan-shaped portion 21d (FIG. 4) formed in a C-shaped portion 21c corresponding to the outer periphery of the core body 4 and connected to the C-shaped portion 21c. ) Is formed, and the rubber material 51a is once filled in the C-shaped portion 21c and extruded into the fan-shaped portion 21d.
The rubber material 51a can be uniformly supplied to the outer circumference of the. Further, the extrusion port member 201 has a through hole 22 and a rubber material 5.
1a has a thin portion 201a separating the thin portion 201a.
Is a small gap 2 between the cores 4 so that the cores 4 can slide.
Equipped with four.

Further, since the extrusion port members 202 and 203 similarly supply the rubber material 52b, at B, the core member 4 is formed.
C-shaped portion 21e corresponding to the outer periphery of the
A fan-shaped portion 21f continuous with e is formed so that the rubber material 52b is uniformly supplied to the outer periphery of the rubber material 51a.
Further, the extrusion port member 202 has a thin portion 202a, and the rubber material 52b is extruded to a predetermined position on the outer periphery of the rubber material 51a through the thin portion 202a, and air or the like is not mixed.

The extruding end 20 is provided downstream of the extruding end 20d.
The rubber materials 51a and 52b extruded with a gap from d are stable on the core body 4, for example, from the extruding ends 20d to 70
The pressure roller 25 is provided downstream of 0 to 1000 mm.
Immediately after extrusion molding, the decorative rubber layer 5 is not adhered to the core body 4 but has slight pulsation due to the running motion of the core body 4, and the appearance that the wall thickness becomes uniform when moved about 700 mm after extrusion. Therefore, the rubber materials 51a and 52b are fixed so as not to move on the core body 4 by the pressure bonding roller 25 provided at this position, and the lower layer 51 and the upper layer 52 are formed by heat vulcanization. Has become.

Further, a winding portion 26 (FIG. 1) for winding the formed hand belt 10 is provided. In order to manufacture a hand belt using the hand belt manufacturing apparatus S having such a configuration, after the canvas 2 sandwiching the steel wire 3 supplied from the supply unit 8 is accurately stacked and aligned by the guide 16, The preforming portion 91 of the core forming portion 9 is bent into a substantially U-shaped cross section. Further, the guide rail 1 is formed by the flat portion forming roller 92a, the bent portion forming roller 92b, and the curved portion forming roller 92c so that the main forming portion 92 has a substantially C-shaped cross section.
While being pressed by 7, the core body 4 is formed. After that, the core body 4 placed on the guide rail 17 and sent to the extruder of the decorative rubber layer molding portion 12 has the through hole 2 of the head 17 of the extruder.
Pass 2. On the other hand, rubber materials 51a and 52b are delivered from the extruders 19a and 19b, respectively. The rubber material 51a passes through the C-shaped portion 21c and the fan-shaped portion 21d of the rubber supply path 21a and is extruded from the extruding end 20d along the outer periphery of the core body 4. At the extrusion end 20d, the thin portion 201a allows the rubber material 51a to be uniformly extruded on the core body 4 with a gap. The rubber material 52b passes through the C-shaped portion 21e and the fan-shaped portion 21f of the rubber supply passage 21b and is extruded from the extruding end 20d along the outer periphery of the rubber material 51a. At the extruding end 20d, since the thin portion 202a extrudes the rubber material 51a with a slight gap, it is extruded uniformly and without mixing air. Immediately after being extruded, the rubber materials 51a and 52b come into contact with the core body 4 to cause slight pulsation. Press and fix. For this reason, the rubber is bonded to the core body 4 with a uniform thickness without causing the pulsation of the rubber to make the end portion wavy or twisting.

After that, the decorative rubber layer is once wound in a non-vulcanized state on the winding section 26, and in another step, the unvulcanized rubber material is vulcanized and adhered by a heating / pressurizing device to form the lower layer 51, The decorative rubber layer 50 including the upper layer 52 is formed, and the hand belt 11 is completed. Although the above-described examples describe the manufacturing device of the hand belt that forms the core body and the decorative rubber layer by one device, the present invention is not limited to this, and after the core body is once formed, the decorative rubber layer is formed. You may make it form a layer. In addition, a heating device for vulcanizing the decorative rubber layer after extrusion coating the decorative rubber layer on the rubber material may be arranged in tandem.

When the decorative rubber layer has a multi-layer structure,
It can also be applied to a head connected to an extruder corresponding to the rubber type.

[0022]

As is clear from the above description, according to the manufacturing apparatus for a passenger conveyor hand belt of the present invention,
Since two kinds of rubber materials are directly extruded directly on the core to form a decorative rubber layer having a two-layer structure, air is not mixed,
High-quality products can be efficiently manufactured.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an apparatus for manufacturing a hand belt for a passenger conveyor according to the present invention.

FIG. 2 is a sectional view of a hand belt for a passenger conveyor manufactured by the embodiment shown in FIG.

FIG. 3 is a view showing a part of a core body molding portion of the embodiment shown in FIG.

FIG. 4 is a cross-sectional view showing a main part of a decorative rubber layer molding portion of the embodiment shown in FIG.

FIG. 5 is a sectional view of the decorative rubber layer molding portion shown in FIG.

FIG. 6 is a cross-sectional view of a conventional passenger conveyor hand belt.

FIG. 7 is a diagram showing a conventional manufacturing apparatus for a passenger conveyor hand belt.

[Explanation of symbols]

 2 ... Canvas 4 ... Core 11 ... Handbelts 19a, 19b ... Extruder 20 ... Heads 21a, 21b ... Rubber supply path 50 ... Decorative rubber layers 51a, 52b. …… Rubber material S ………… Hand belt manufacturing equipment for passenger conveyors

Claims (1)

[Claims] 1. A manufacturing apparatus for a hand belt for a passenger conveyor, comprising: a core body of a laminated body of canvas having a substantially C-shaped cross section; and a multilayer decorative rubber layer laminated on the core body. An apparatus for manufacturing a handbelt for a passenger conveyor, comprising: a plurality of extruders for respectively extruding a rubber material forming a rubber layer, and one head to which the plurality of extruders are connected is provided.