JP4649270B2 - How to connect a handrail for passenger conveyor - Google Patents

Description

The present invention relates to a method for connecting a moving handrail for a passenger conveyor which is provided on a railing of a passenger conveyor such as an escalator or a moving sidewalk and is driven to rotate in synchronization with a step.

  In general, a passenger conveyor such as an escalator has an endless moving handrail 3 arranged on the outer periphery of a step 1 arranged endlessly between the upper and lower floor side entrances and a balustrade 2 on both right and left sides as shown in FIG. Are transported by rotating them in the same direction in synchronization with each other. Such a moving handrail 3 of the escalator is generally composed of a plurality of driving rollers 4 provided in the middle of the return path of the moving handrail in the lower part of the balustrade 2 and a pressure roller 5 disposed so as to be in rolling contact with the lower side of each driving roller 4. As shown in FIG. 5 (cross-sectional view taken along the line CC in FIG. 4), the two rollers 4 and 5 are sandwiched between the rollers 4 and 5 and are driven by the frictional force generated by the rotation of the drive roller 4. The handrail 3 to be driven is guided by a plurality of guide rollers (not shown) on the return path in the lower part of the balustrade 2, and the handrail guide rail attached to the balustrade frame on the upper part of the balustrade 2 10 is guided to rotate and move endlessly.

6 is a partial cross-sectional view of the sliding mechanism including the moving handrail 3 and the handrail guide rail 10, and is a cross-sectional view of the moving handrail forward path side in FIG.
As shown in FIG. 6, the movable handrail 3 itself has a C-shaped cross section as a whole, constitutes a T-shaped inner slot as a whole, and a core layer 31 extending around the T-shaped slot, A surface layer 32 that extends around the outside of the core body layer 31 to define the outer contour of the moving handrail 3, a slider layer 33 that is coupled to the inner surface of the core body layer 31, and an extension preventing means that extends into the core body layer 31. (Tensile body) 34. A thermoplastic elastomer is used for the core layer 31 and the surface layer 32.

  As shown in FIG. 6, the handrail guide rail 10 at the upper part of the balustrade 2 of the passenger conveyor is provided with synthetic resin guide clips 10 a on the convex portions on both sides thereof so as to be in sliding contact with the inner peripheral surface of the movable handrail 3.

  The canvas is used for the innermost slider layer 33 of the moving handrail 3. The role of the slider layer 33 is to set the coefficient of friction when sliding with the handrail guide clip 10a to an appropriate value. This is because the shape 3 is maintained in a C shape with a predetermined strength.

  This moving handrail manufacturing method has a substantially C-shaped cross section in which a thermoplastic elastomer for a core body layer, a metal or synthetic fiber tensile body and a slider are simultaneously extruded from a molding machine, and the tensile body and the slider are conjugated. And forming a surface layer having a substantially C-shaped cross section by extruding from a molding machine a thermoplastic elastomer for a surface layer that is transparent and is colored in a desired color such as a customer-specified color. At least a process.

  Since the moving handrail 3 of the passenger conveyor is incorporated into the passenger conveyor in an endless (annular) form, the linear moving handrail 3 is cut into a predetermined length, and both ends thereof are connected to form an endless shape. First, the ends of the core body layer 31, the slider layer 33, and the surface layer 32 are removed from both ends of the moving handrail 3 cut to a predetermined length, and the tensile body 34 is exposed. Next, both ends of the exposed tensile body 34 are overlapped with each other via an adhesive. Thereafter, the connecting portion is set in the mold 100 shown in FIG. The mold 100 includes an upper mold 200, a lower mold 300, and a middle mold 400 that is divided into three and fits into the recess 300 a of the lower mold 300. Further, the cavity in the mold 100 is filled with the thermoplastic elastomer for the core material, and is heated and cooled and cured. This completes the formation of the connecting portion (see, for example, Patent Document 1).

  As shown in detail in FIG. 8 and FIG. 9 (cross-sectional view taken along the line DD in FIG. 8), the filling portion 3a exists in the middle of the connected handrail main body portions 3 as shown in detail in FIG. Since the filling portion 3a does not have a slider portion, the portions a to d in FIGS. 8 and 9 are cracked by bending of the handrail, and when used for a long time, the moving handrail is broken from this portion. Therefore, in order to prevent the moving handrail from being broken, as shown in FIGS. 10 and 11 (cross-sectional views taken along the line EE in FIG. 10), a filling cloth 33a for reinforcement is provided in the filling portion 3a. The application cloth 33a is set in the mold 100 by applying a thermosetting adhesive to the slider 33 during the annular connection.

In FIG. 7, in the electric heating unit as a heating element in the mold 100, electric heating units R <b> 1 and R <b> 2 are provided on the upper mold 200, and electric heating units R <b> 3 and R <b> 4 are provided on the lower mold 300. The mold 100 further includes a plurality of fastening bolts 60 for fastening the upper mold 200 and the lower mold 300, cooling holes 70 and 70 a through which a cooling fluid provided in the upper mold 200 passes, and the lower mold 300. Cooling holes 80 and 80a through which the provided cooling fluid passes are provided. In the figure, reference numeral 3 denotes a moving handrail.
With the above configuration, when the moving handrail 3 of the passenger conveyor is connected, the moving handrail 3 is sandwiched between the upper mold 200, the middle mold 400 and the lower mold 300 as shown in FIG. A pressing force may be applied to the mold 300.
If the electrothermal units R1 to R4 generate heat in a state where pressure is applied to the upper mold 200 and the lower mold 300, the movable handrail 3 can be connected by thermal fusion.
Next, a method for cooling the mold 100 after the connection is completed will be described.
First, the heat generation of the electric heating units R1 to R4 is stopped, and then the cooling holes 70 and 70a through which the cooling fluid provided in the upper mold 200 passes and the cooling holes through which the cooling fluid provided in the lower mold 300 pass. The cooling fluid is injected into 80 and 80a to cool the mold 100.

JP 2000-211182 A

However, in the conventional connection method of the moving handrail, when thermoplastic urethane, which is a thermoplastic elastomer, is heated in the mold 100 during connection and the pressure in the mold rises, both ends of the mold are opened. Since the plastic urethane extends to both sides of the mold, a tensile force is generated between the application cloth 33a bonded with the thermosetting adhesive and the slider 33, and a relative motion is generated. Therefore, the bonded application cloth 33a and the slider There was a problem that the adhesive strength of the adhesive between 33 was lowered. For this reason, there has been a problem that the application cloth 33a of the connecting portion is peeled off by the pulling force of the moving handrail applied when the moving handrail is put into practical use on the actual escalator.

The present invention has been made to solve the above-described problems, and the adhesive force of the application cloth of the connecting portion of the moving handrail is also caused by the pulling force of the moving handrail applied when the moving handrail is put into practical use on the actual escalator. The present invention provides a method for connecting a handrail for a passenger conveyor that does not deteriorate.

In the moving handrail connection method for passenger conveyor according to the present invention, the moving handrail made of thermoplastic elastomer having a slider layer on the innermost side is cut to a predetermined length, and both end portions thereof are connected to be formed endlessly. It consists of a middle mold that is applied inside the upper mold, the lower mold, and the moving handrail by applying a predetermined length of the application cloth to the connecting portion, applying a thermosetting adhesive between the slider layer and the application cloth. in those connecting the connecting portion of the handrail by heating while pressurizing in a mold heating unit in at least two or more types is provided, by energizing the at least one electric heating unit, the temperature of the mold After heating and curing the thermosetting adhesive to the first predetermined temperature, all of the electric heating units are energized to heat the mold temperature to a second predetermined temperature higher than the first predetermined temperature. Heat It is intended to thermally fuse the sex elastomer moving handrail.

In the moving handrail connection method for passenger conveyor according to the present invention, the moving handrail made of thermoplastic elastomer having a slider layer on the innermost side is cut to a predetermined length, and both end portions thereof are connected to be formed endlessly. It consists of a middle mold that is applied inside the upper mold, the lower mold, and the moving handrail by applying a predetermined length of the application cloth to the connecting portion, applying a thermosetting adhesive between the slider layer and the application cloth. In the case of connecting the connecting portion of the moving handrail by applying pressure to the upper mold, the lower mold and the middle mold with the mold provided with the electric heating unit , the middle mold electric heating unit is energized to set the temperature of the mold to the first. After the thermosetting adhesive is heated and cured to a predetermined temperature, the upper mold heating unit and the lower mold heating unit are energized to preheat the mold, and the upper mold heating unit and the lower mold heating unit are further heated. Energizing amount The temperature of the mold is heated to a second predetermined temperature higher than the first predetermined temperature is to heat-sealed thermoplastic elastomer handrail by listening.

According to this invention, energizing at least one of the electric heating units , heating the mold temperature to the first predetermined temperature to heat and cure the thermosetting adhesive, and then energizing all of the electric heating units, Since the temperature of the mold is heated to a second predetermined temperature higher than the first predetermined temperature to heat-seal the thermoplastic elastomer moving handrail, the thermoplastic elastomer is molded into the mold by the pressure inside the mold. It is possible to withstand the pressure that extends from both ends of the rail, and there is an effect that the adhesive force of the connecting portion of the moving handrail does not decrease.

Embodiment 1 FIG.
Hereinafter, the method for connecting a moving handrail for passenger conveyor in Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a structural diagram of a mold showing a method for connecting a moving handrail for a passenger conveyor, FIG. 2 is a control circuit diagram of an electric heating unit for heating the mold, and FIG. 3 is a time chart showing a temperature change of the mold.
In FIG. 1, a mold 100 includes an upper mold 200, a lower mold 300, and a middle mold 400 that is divided into three and fits into a recess 300 a of the lower mold 300. The electric heating unit as a heating element in the mold 100 includes the upper die 200 provided with the electric heating units R1 and R2, the lower die 300 provided with the electric heating units R3 and R4, and the three-divided middle die 400. An electric heating unit R5 is provided in the mold located in the center. The mold 100 includes a plurality of fastening bolts 60 for fastening the upper mold 200 and the lower mold 300. Further, the mold 100 is divided into three cooling holes 70 and 70a through which the cooling fluid provided in the upper mold 200 passes, cooling holes 80 and 80a through which the cooling fluid provided in the lower mold 300 passes, and three parts. A cooling hole 90 through which a cooling fluid provided in a mold located in the center of the middle mold 400 is provided. In the figure, reference numeral 3 denotes a moving handrail, and although not shown, an elastic thermosetting adhesive is applied between the slider layer 33 and the application cloth 33a.

In FIG. 2, AC is an AC power source, R1 and R2 are heaters for the upper electric heating unit, R3 and R4 are heaters for the lower electric heating unit, R5 is a heater for the middle electric heating unit, SW1 is a thyristor for the upper electric heating unit, and SW2 is A thyristor for lower mold electric unit, SW3 is a thyristor for medium electric unit, S1 is an upper mold temperature sensor provided in the upper mold 200, S2 is a lower mold temperature sensor provided in the lower mold 300, and S3 is provided in the middle mold 400. It is a medium temperature sensor. Reference numeral 500 denotes a control device, which includes a microcomputer CPU, a random access memory RAM, a read only memory ROM, an interface I / F, and the like.
The control device 500 variably controls the heating temperature and / or the heating start time of the heaters R1, R2 of the upper electric heating unit by controlling the starting circuit of the thyristor SW1 for the upper electric heating unit according to a preset program. To do. At this time, the signal of the upper mold temperature sensor S1 is fed back to the control device 500 so that the temperature of the upper mold 200 becomes a set value. Hereinafter, the control device 500 controls the starting temperature of the heaters R3 and R4 of the lower electric heating unit by controlling the ignition circuit of the thyristor SW2 for the lower electric heating unit according to a preset program. Variable control. At this time, the signal of the lower mold temperature sensor S2 is fed back to the control device 500 so that the temperature of the lower mold 300 becomes a set value. Further, the control device 500 variably controls the heating temperature and / or the heating start time of the heater R5 of the medium-sized electric heating unit by controlling the ignition circuit of the medium-sized electric heating unit thyristor SW3 by a preset program. At this time, the signal of the medium temperature sensor S3 is fed back to the control device 500 so that the temperature of the medium mold 400 becomes a set value.

When the moving handrail 3 of the passenger conveyor is connected with the above configuration, as shown in FIG. 3, first, at time t1, an ignition signal is sent to the thyristor SW3 for the medium-sized electric heating unit, and the heater for the medium-sized electric heating unit R5 is energized. Then, when the temperature of the middle mold 400 gradually increases and reaches the first predetermined temperature T1, the thermosetting adhesive applied to the application cloth 33a starts to be cured, and strong bonding is performed between the application cloth 33a and the slider 33. Demonstrate power.
Next, at time t <b> 2-1, the upper die heating unit thyristor SW <b> 1 and the lower die heating unit thyristor SW <b> 2 are turned on to preheat the entire mold 100. Furthermore, at time t2-2, the conduction angle of the upper type electric heating unit thyristor SW1 and the lower type electric heating unit thyristor SW is increased to be heated to the second predetermined temperature T2, thereby completing the connection of the moving handrail. To do.
When the connection is completed and the mold 100 is cooled, all the thyristors SW1 to SW3 are turned off at time t3, the heat generation of the electric heating units R1 to R5 is stopped, and the cooling fluid provided in the upper mold 200 The cooling fluid passes through the cooling holes 70 and 70a through which the cooling fluid passes, the cooling holes 80 and 80a through which the cooling fluid provided in the lower die 300 passes, and the cooling holes 90 through which the cooling fluid provided in the middle die 400 pass. The mold 100 is injected to cool the mold 100 (time t4).

In addition, after the thermosetting adhesive applied to the application cloth 33a starts to harden and the adhesive force between the application cloth 33a and the slider 33 becomes a predetermined value or more, the entire mold 100 is preheated, By increasing the conduction angle of the upper type electric heating unit thyristor SW1 and the lower type electric heating unit thyristor SW at time t2-2, the temperature can be raised to the temperature at which the moving handrail is connected.
Further, even if the heating start temperature of the lower mold 300 or both of the middle mold 400 and the lower mold 300 is made earlier than the heating start time of the upper mold 200, substantially the same effect as in the first embodiment can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of a mold showing a passenger conveyor moving handrail connection method according to Embodiment 1 of the present invention. It is a control circuit diagram of the electric heating unit which heats the metal mold | die of the moving handrail connection method for passenger conveyors in Embodiment 1 of this invention. It is a time chart which shows the temperature change of the metal mold | die of the moving handrail connection method for passenger conveyors in Embodiment 1 of this invention. It is a side view showing a schematic structure of a general passenger conveyor. It is sectional drawing along CC line of FIG. It is a partial cross section figure of the sliding mechanism containing a moving handrail and a handrail guide rail. It is structural drawing of the metal mold | die which shows an example of the conventional moving handrail connection method for passenger conveyors. It is the figure seen from the inner surface side which shows an example of the connection part of the conventional moving handrail for passenger conveyors. It is sectional drawing along the DD line of FIG. It is the figure seen from the inner surface side which shows the other example of the connection part of the moving handrail for conventional passenger conveyors. It is sectional drawing along the EE line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Step 2 Railing 3 Moving handrail 3a Filling part 4 Drive roller 5 Pressure roller 10 Handrail guide rail 10a Handrail guide clip 31 Core layer 32 Surface layer 33 Slider layer (canvas)
33a
34 Tensile body 60 Tightening bolt 70, 70a, 80, 80a, 90 Cooling hole 100 Mold 200 Upper mold 300 Lower mold 300a Recess 400 Medium mold 500 Control device
R1 to R5 Electric heating unit SW1 to SW3 Thyristor S1 to S3 Temperature sensor

Claims (5)

A moving handrail made of a thermoplastic elastomer having a slider layer on the innermost side is cut to a predetermined length, and both ends thereof are connected and formed endlessly. A thermosetting adhesive is applied between the slider layer and the application cloth, and is composed of an upper mold, a lower mold, and a middle mold inserted inside the moving handrail, and at least two or more molds are provided with an electric heating unit. In connecting the connecting part of the moving handrail by heating while pressing with a mold,
Energizing at least one of the electric heating units, heating the mold temperature to a first predetermined temperature to heat and cure the thermosetting adhesive , energizing all of the electric heating units, A method for connecting a moving handrail for a passenger conveyor , wherein the temperature of a mold is heated to a second predetermined temperature higher than the first predetermined temperature to heat- seal the thermoplastic elastomer moving handrail. A moving handrail made of a thermoplastic elastomer having a slider layer on the innermost side is cut to a predetermined length, and both ends thereof are connected and formed endlessly. A patch of predetermined length is applied to the connecting portion. A thermosetting adhesive is applied between the slider layer and the application cloth, and the upper die, the lower die, and the middle die inserted inside the moving handrail, and the upper die, the lower die, and the middle die are electrically heated. In connecting the connecting part of the moving handrail by heating while pressing with a mold provided with,
  Energizing the middle-sized electric heating unit, heating the mold temperature to a first predetermined temperature to heat and cure the thermosetting adhesive, and then energizing the upper mold electric heating unit and the lower mold electric heating unit The mold is preheated, and further, the temperature of the mold is heated to a second predetermined temperature higher than the first predetermined temperature by energizing the upper mold electric heating unit and the lower mold electric heating unit. A method for connecting a moving handrail for a passenger conveyor, wherein the thermoplastic elastomer moving handrail is thermally fused. After the thermosetting adhesive applied between the slider layer and the backing cloth begins to harden and the adhesive force between the backing cloth and the slider layer exceeds the specified value, the moving handrail connects the temperature of the entire mold. The method for connecting a handrail for a passenger conveyor according to claim 1 or 2, characterized in that the temperature is increased to a temperature to be detected. Claim 2 Symbol mounting the handrail connection for the passenger conveyor, characterized in that earlier than the heating start time of the upper mold heating unit medium-sized electric units with both heating start time of the lower mold heating unit. The moving handrail connection method for a passenger conveyor according to claim 1 or 2, wherein the thermosetting adhesive has elasticity.

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