JPS58222833A - Connection of hand rail - Google Patents

Abstract

PURPOSE:To prevent the generation of zigzag and disturbance of code pitches by a method wherein only lap sections of tension members are connected by vulcanization through an unvulcanized rubber and a tensile force is applied to both ends of the connection later at the mold pressing. CONSTITUTION:A fancy rubber 3 and a cotton canvas 2 at both ends are peeled off. Only tension members 9 and 9 are lapped one upon another by a proper length in such a manner that an unvulcanized rubber sheet 8 is so arranged between laps to adhere thereto on one side and then, put together by vulcanization under pressure with a small joint press 10. Then, an unvulcanized rubber sheet 11 is arranged on the portions excluding the lap sections of the members 9 and the unvulcanized rubber sheet 8 and the connection of a hand rail 13 is set on a molding die 5 with the cotton canvas 2 and the fancy rubber 3 butting together. When the connection at both ends is molded solidly, a tensile force is applied to the entire hand rail 13 with a tensile force generators 7 each positioned at both ends of the molding die 5. This can eliminate the zigzag of the members 9 and disturbed pitch between the members 9 due to the fluidity of the unvulcanized rubber sheets 8 and 11 near the lap sections.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting tension members by wrapping them together.

When obtaining an endless knot rail 1 as shown in Figs. 1 and 2, tension members (tensile members) 4 at both ends are attached to a predetermined length in a mold 5 as shown in Fig. 3. The handrail is connected and integrated by arranging it in a lap (wrap part L) and setting the handrail constituent materials such as the rubberized canvas 2 and the decorative rubber 3 together in the mold 5 and vulcanizing them. (Endless) is being carried out. However, the tension member 4 of the handrail is made of a material such as aramid fiber, which has high tensile rigidity but low compressive rigidity (that is, high flexibility).
The tension member 4 and other handrail constituent materials such as canvas 2 and decorative rubber layer 3
If you laminate them and perform pressure vulcanization all at once as mentioned above,
Because the tension member 4 is moved in a direction perpendicular to the longitudinal direction by the flow of the rubber covering the tension member 4 during vulcanization, the pitch between the cords making up the tension member 4 may be disturbed. In other words, the tension member 4 as a whole moves from side to side with respect to the longitudinal direction, or the so-called meandering of the tension member 4 occurs. As a preventive measure, when molding parts other than the connection part of the tension member, as shown in FIG. Integration is taking place. In this case, it is not possible to apply sufficient tension to the connection part of the tension member to prevent meandering and disorder of the cord pitch, so it is necessary to sew the connection part of the tension member with adhesive-treated thread to the canvas layer above or below the tension member. Although the ends of the cotton canvas used to construct the handrail are sewn together and a tension equal to the tensile rigidity of the canvas is applied, this is not a complete preventive measure.

In addition, when a handrail with a tension member with a meandering or irregular pitch is installed on an escalator or an auto line main unit and is operated, the meandering part or the irregular pitch part of the tension member will be straight (in a straight line) in the longitudinal direction. As a result, the handrail may become meandering in appearance, or the handrail may become abnormally deformed and come into contact with the frame of each device or the limit switch installed for safety reasons.
There is a possibility that a situation may occur where the operation becomes impossible. The present invention solves the drawbacks of the prior art described above and provides a handrail connection method that does not cause meandering or cord pitch disturbance in the tension member after vulcanization. The extent to which tension can be applied in a hunt rail connection method using a tension member made of a material with lower compressive rigidity than tensile rigidity, such as steel cord, strong silk cord, or glass fiber. In order to achieve this, only the lap portion of the tension member is vulcanized and connected using a vulcanization press, etc., and then tension is applied to both ends of the connection portion at the time of mold pressing with canvas, decorative rubber, etc., which are the constituent materials of the handrail. It is in the connection method of the handrail.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, although not shown in the drawings, the surface of the multiple cords made of aramid fibers, which have low compressive stiffness (with respect to tensile stiffness), has good adhesion to rubber. In order to
We prepared a tension member for a handrail treated with a latex adhesive made of a mixture of Vinyl Vinyl Resin and Styrene Bookie/Rubber (SB 几), and each cord treated with the adhesive was attached to the fourth As shown in the figure, a plurality of tension members 9 integrated in parallel on one side of an unvulcanized rubber notebook 8 are prepared.

Next, a cotton canvas band 2 and a decorative rubber band 3 as shown in FIG. 2 are prepared, and the tension members 9 made of the aramid fibers described above are arranged at appropriate positions to form a band-shaped laminate to form an endless one. The laminate other than the part to be set is set in the hatch rail mold die 5 shown in FIG. It is pressure-cured into a C-shaped cross section using a neck press (6). In this case, since tension is applied to the tension members 9 during vulcanization, there is no possibility that the members 9 meander due to the flow of rubber during molding. Next, the middle part is made into an endless by connecting both ends of the laminate, which has been formed into an almost endless rail.In this case, first, as shown in Fig. Turn over 2 and wrap only the tension bars 9 and 9 to an appropriate length, and between the wraps place an unvulcanized rubber joint 8 that has been glued and integrated on one side in advance, and press a small joint press lO from above and below. They are integrated by pressure vulcanization. In this case, tension member 9
The unique latex adhesive adhering to the surface of the aramid fibers is melted by heat and integrated with the unvulcanized rubber sheet 8 through a chemical reaction, and at the same time, the unvulcanized rubber sheet 8 is added to the unvulcanized rubber sheet. tension member
9 Connection is completed only for the comrade's lap portion. Moreover, during this pressing, it goes without saying that the unvulcanized rubber other than the lap portion of the tension member 9 must be removed in advance so as not to be affected by the press heat. The unvulcanized rubber sheet 8 was used to improve the adhesion between the tension member 9 and the cotton canvas 2, and the unvulcanized rubber was placed between the wraps on the tension member 9. In this case, there is no need to prepare an unvulcanized rubber sheet in advance, and there is an advantage that the unvulcanized rubber sheet 8 can be used immediately for the wrapping part.

Next, once the bonding and integration of the lap portions of the tension member/member 9 is completed, as shown in FIG. An unvulcanized rubber sheet 1 similar to the unvulcanized rubber sheet 8 is placed in the wrap area and the area where the unvulcanized rubber sheet 8 has been removed, and as shown in FIG. The connecting parts of the handrails 13 obtained by butting the decorative rubbers 3 and sewing together the cotton canvases 2 (stitched parts 12) are set in the mold 5 shown in FIG. 3. In this case, when the middle part in the longitudinal direction of the handrail 13 is vulcanized and the connecting parts at both ends are molded together, the entire handrail 13 is Tension is applied to the tension member 7 and the ends of the member 9 are connected together via the vulcanized rubber sheet 8 in advance, so
The tension can be increased up to the tension allowed by the tension member 9. Moreover, even if pressure vulcanization is performed under tension, the vulcanization reaction of the rubber between the wraps of the tension member 9 has already been completed by the small joint press 1°, so the mold press 6 There is no risk that the rubber between the wraps will flow due to the heat of There is no fear that the ten/jin member 9 near the lap portion will meander or that the pitch between the members 9 will be disturbed. In addition, in this case, the surface of the aramid fibers has been previously treated with a latex-based adhesive that has been completely mixed with phenol thread condensation polymerization treatment liquid Valkabond, vinyl vinyl resin, and styrene-butadiene rubber. Because it is strongly integrated with the rubber layer through a chemical reaction,
It is also important to note that when the entire trail is vulcanized with the mold 5, the adhesive force of the tensile member 7/member 9 with the rubber 8 does not decrease even if the rubber vulcanization temperature history changes.

In addition to aramid fibers, other materials such as steel cords, strong human silk cords, and glass fibers, which have lower compressive rigidity than tensile rigidity, can also be considered as the tensile member.

Also, in this example, the middle part of the handrail was molded, and then the connection part was connected and molded. However, the connection part of the handrail was connected and molded first, and then the middle part was molded. It may also be molded.

As described above, according to the present invention, only the lap portion of the balance member is vulcanized and connected via unvulcanized rubber in advance at the handrail connection portion, and then the entire handrail constituent material of the connection portion is vulcanized and connected. Because it is pressure-cured under tension, the ten-member will not be disturbed at all during vulcanization, and there will be no part of the canvas rising during molding as in the past. Therefore, there is no fear that the decorative rubber will crack due to the swelling, and therefore its industrial value is high.

[Brief explanation of the drawing]

Figure 1 is a side view of a general endless handrail, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, Figures 3 and 3 are explanatory diagrams showing a general mold, Figures 4 and 3. FIG. 5 and FIG. 6 are explanatory diagrams showing essential parts of the present invention. 1.13...handrail, 2...cotton canvas, 3...
・Makeup=：+”mu, 4, 9...Tension member, 5...Handrail mold, 6...Mold press, 7...Tension device, 8, 11...Unfinished Sulfur rubber sort, 1°...Small joint press, 12...
・Sewing part.

Claims (1)

[Claims] In the method of connecting a tension member using a tension member made of a material such as aramid fiber, steel cord, strong human silk cord, or glass fiber, which has a lower compressive rigidity than tensile rigidity, the tension member is Only the lap part is vulcanized and connected using a vulcanization press or the like via unvulcanized rubber, and tension is applied to both ends of the connection part when it is later mold-pressed with canvas and decorative rubber, etc., which are the constituent materials of the no-no-drail. A handrail connection method characterized by hanging.