JP2017141089A - Moving handrail of passenger conveyor and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving handrail of a passenger conveyor, in which stress concentration caused by discontinuity of bending rigidity is suppressed while securing strength of a connection part.SOLUTION: A plurality of reinforcement clothes 14a, 14b, and 14c are buried in ear parts 11b and 11c of a connection part 11d. The reinforcement clothes 14a, 14b, and 14c are arranged along a longitudinal direction of a handrail main body 11 at intervals in a vertical direction when the handrail main body 11 is viewed in a state where an opening 11a is below the body. Further, when the handrail main body 11 is viewed in the state where the opening 11a is below the body, lengths of the reinforcement clothes 14a, 14b, and 14c in the longitudinal direction of the handrail main body 11 gradually become longer as going from the reinforcement cloth 14a arranged at the highest position toward the reinforcement cloth 14c arranged at the lowest position.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a moving handrail for a passenger conveyor in which a plurality of reinforcing cloths are embedded in an ear portion of a joint portion of a handrail body, and a method for manufacturing the same.

  In general, a moving handrail of a passenger conveyor includes a handrail body having a C-shaped cross section, a plurality of tensile bodies embedded in the handrail body, and a canvas attached to the inner surface of the handrail body. Yes. The handrail body is mainly composed of a resin such as urethane. The tensile body is made of steel tape or wire, and ensures strength against tension.

  Moreover, when manufacturing a moving handrail, a linear intermediate body is first made by an extrusion manufacturing method. And the both ends of an intermediate body are faced | matched, adhere | attached, and it heats. Thereby, both ends of the intermediate body are connected to form an annular moving handrail.

  In the connecting portion, which is a portion where the both ends of the handrail body in the intermediate body are connected, it is necessary to firmly connect the handrail body and the canvas between the ends in order to ensure the tensile strength in the same portion.

  On the other hand, in the conventional method for connecting the handrails for passenger conveyors, a plurality of layers of canvas are arranged in the thickness direction of the moving handrail. Moreover, the length of the canvas of each layer differs in a connection part, The canvas piece from which a length differs in each layer is arrange | positioned between the both ends of a canvas (for example, refer patent document 1).

  On the other hand, the moving handrail is bent in both directions in the thickness direction in a process of circular movement along the route. As a result, the moving handrail receives not only a tension as a driving force against its own resistance but also a bending force in both directions in the thickness direction.

  Here, unlike the other continuously configured portions, the connecting portion has a discontinuity in strength and rigidity, so that it is likely to be cracked or peeled off due to repeated operations. For this reason, in the moving handrail using a plate-like tensile body, the ends of the tensile body are overlapped with each other in order to ensure the tensile strength of the joint portion. In addition, one or a plurality of reinforcing cloths are often embedded in the ears of the connecting part of the moving handrail.

Japanese Patent Application Laid-Open No. 11-79539

  In the conventional moving handrail as described above, the end portions of the plate-like tensile bodies are overlapped with each other, or one or a plurality of reinforcing cloths are embedded in the ear portion. The rigidity with respect to is higher than that of other parts, and the connecting part is difficult to bend and deform. Therefore, when the moving handrail follows a curved path, both ends of the reinforcement region of the joint portion cannot follow a smooth curve, the moving handrail is deformed into a polygonal shape, and local stress concentration occurs. Cracks resulting from this sometimes occurred.

  On the other hand, in the connection method disclosed in Patent Document 1, there is a possibility that the stress concentration in the thickness direction may be dispersed by making a difference in the length in the thickness direction, but the absolute strength is reduced. There is no reinforcement, and the problem of stress concentration due to discontinuity in strength and rigidity of the joint is not solved at all.

  The present invention has been made to solve the above-described problems, and is a moving handrail for a passenger conveyor capable of suppressing stress concentration due to discontinuity in bending rigidity while ensuring the strength of the joint portion, and its It aims at obtaining a manufacturing method.

  The moving handrail of the passenger conveyor according to the present invention has a cross-sectional shape perpendicular to the longitudinal direction, which is a C-shape in which an opening is provided in a part of the annular shape, and continuously along the longitudinal direction on both sides of the opening. An annular handrail body having a pair of formed ears and a joint provided in a part in the longitudinal direction, and a plurality of reinforcing cloths embedded in the ears of the joint When the handrail body is viewed with the opening facing down, the length of the reinforcement cloth in the longitudinal direction of the handrail body is from the reinforcement cloth arranged at the top to the reinforcement cloth arranged at the bottom. It becomes longer in order.

  In the moving handrail of the passenger conveyor of the present invention, when the handrail main body is viewed with the opening facing down, the length of the reinforcing cloth in the longitudinal direction of the handrail main body is the lowest from the reinforcing cloth disposed at the top. Since it becomes long in order toward the reinforcement cloth arrange | positioned in (2), the stress concentration by discontinuity of bending rigidity can be suppressed, ensuring the intensity | strength of a connection part.

It is a schematic block diagram which shows the escalator by Embodiment 1 of this invention. It is sectional drawing which shows a cross section orthogonal to the longitudinal direction of the moving handrail of FIG. It is a top view which shows the connection part vicinity of the handrail main body of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is a graph which shows the bending rigidity of the connection part of FIG. It is sectional drawing of the connection part by Embodiment 2 of this invention. It is sectional drawing which follows the VIII-VIII line of FIG. It is a graph which shows the bending rigidity of the connection part of FIG. It is process drawing which shows the manufacturing method of the moving handrail by Embodiment 3 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a schematic configuration diagram showing an escalator according to Embodiment 1 of the present invention. In FIG. 1, the truss 1 is constructed between the architectural beams 2a and 2b on the upper and lower floors. The truss 1 supports a plurality of steps 3 connected endlessly. The steps 3 are circulated and guided by a plurality of rails (not shown) installed in the truss 1.

  A pair of balustrade bodies 4 are erected on the truss 1 on both sides of the step 3. Each balustrade body 4 is provided with an annular moving handrail 5 that circulates in synchronization with the steps 3. The moving handrail 5 moves on the balustrade body 4 in its outward path. In addition, the moving handrail 5 is folded back at the nail portion at one end portion of the balustrade body 4, moves within the truss 1, and is pulled out from the other end portion of the balustrade body 4.

  The forward path side section of the moving path of the moving handrail 5 has a lower horizontal part A, a lower curved part B, an intermediate inclined part C, an upper curved part D, and an upper horizontal part E. The lower horizontal portion A, the intermediate inclined portion C, and the upper horizontal portion E are straight sections, and the lower curved portion B and the upper curved portion D are curved sections. In addition, the upper and lower folded portions are curved sections.

  FIG. 2 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the moving handrail 5 of FIG. The moving handrail 5 includes a resin-made annular handrail main body 11, a plurality of metal tensile bodies 12 embedded in the handrail main body 11, and a canvas 13 attached to the inner surface of the handrail main body 11. Have.

  The cross-sectional shape perpendicular to the longitudinal direction of the handrail body 11 (= Z-axis direction = traveling direction of the moving handrail 5) is a C-shape in which an opening 11a is provided in a part of an annular shape (ellipse or ellipse). As a material of the handrail main body 11, for example, polyurethane or rubber is used. On both sides of the opening 11a of the handrail main body 11, a pair of ear portions 11b and 11c are continuously formed along the longitudinal direction.

  The tensile body 12 is continuously arranged in the longitudinal direction of the moving handrail 5 in order to ensure the tensile strength of the moving handrail 5. The tensile body 12 is embedded in a portion facing the opening 11 a of the handrail main body 11. In general, a steel tape or a wire is used as the tensile body 12, but FIG. 2 shows an example using a wire.

  The canvas 13 covers the surface of the handrail main body 11 opposite to the surface gripped by the passenger. The canvas 13 is configured by weaving fibers such as cotton or polyester. Furthermore, both ends of the canvas 13 in a cross section perpendicular to the longitudinal direction of the handrail body 11 are bent at right angles and embedded in the ear portions 11b and 11c.

  Since the tensile body 12 is very hard compared to the handrail body 11 and the canvas 13, the bending center C when the moving handrail 5 is bent in the thickness direction (= Y-axis direction) in the curved section is the moving handrail 5. It exists closer to the tensile body 12 than the center in the thickness direction in the cross section. For this reason, when bending deformation occurs in the moving handrail 5, the stress generated in the ear portions 11b and 11c that are the farthest from the bending center C increases.

  When manufacturing the moving handrail 5, a linear intermediate body is first made by an extrusion manufacturing method. And the both ends of an intermediate body are faced | matched and connected. A part 11d in the longitudinal direction of the handrail main body 11 is provided with a connecting portion 11d which is a portion where both ends of the intermediate handrail main body 11 are connected. FIG. 3 is a plan view showing the vicinity of the connecting portion 11d of the handrail body 11 of FIG.

  In the connecting portion 11d, in order to secure strength against tension parallel to the longitudinal direction of the handrail main body 11, both ends of the intermediate tension member 2 are arranged in an interlocking state. In FIG. 3, for the sake of simplicity, the number of the tensile bodies 12 is smaller than that in FIG.

  4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a sectional view taken along line VV in FIG. A plurality of reinforcing cloths 14a, 14b, and 14c are embedded in the ear portions 11b and 11c of the connecting portion 11d, respectively. The same material as the canvas 13 is used as the material of the reinforcing cloths 14a, 14b, and 14c.

  As shown in FIG. 5, the reinforcing cloths 14 a, 14 b, and 14 c are spaced apart from each other in the vertical direction when the handrail body 11 is viewed with the opening 11 a facing down. It is arranged linearly along.

  Further, the reinforcing cloths 14a, 14b, and 14c are disposed symmetrically with respect to the center of the connecting portion 11d in the longitudinal direction of the handrail main body 11 while straddling both ends of the intermediate handrail main body 11.

  The canvas 13 may be disposed up to both ends of the intermediate body or may be cut short from the end. In any case, the reinforcing cloths 14a, 14b, and 14c are disposed so as to overlap the regions where the canvas 13 is disposed at both ends of the intermediate body. Both ends of the canvas 13 are disposed between the reinforcing cloths 14b and 14c.

  Also, as shown in FIG. 5, when the handrail body 11 is viewed with the opening 11a facing down, the lengths of the reinforcing cloths 14a, 14b, 14c in the longitudinal direction of the handrail body 11 are arranged at the top. The reinforcing cloth 14a becomes longer from the reinforcing cloth 14a to the reinforcing cloth 14c arranged at the bottom. That is, the length of the reinforcing cloths 14a, 14b, and 14c in the longitudinal direction of the handrail main body 11 increases as it goes to the outer side of the cross section of the movable handrail 5.

  In this example, the length L2 of the reinforcing cloth 14b is longer than the length L1 of the reinforcing cloth 14a, and the length L3 of the reinforcing cloth 14c is longer than the length L2 of the reinforcing cloth 14b (L1). <L2 <L3). Further, the difference between the length L1 and the length L2 is the same as or substantially the same as the difference between the length L2 and the length L3.

  FIG. 6 is a graph showing the bending rigidity of the connecting portion 11d of FIG. 5, and the bending rigidity of the connecting portion 11d of the first embodiment is shown by a solid line. Moreover, the bending rigidity when the lengths of the reinforcing cloths 14a, 14b, and 14c are all the same is indicated by a broken line.

  When the lengths of the reinforcing cloths 14a, 14b, and 14c are all the same, the bending rigidity of the region in which the reinforcing cloths 14a, 14b, and 14c are arranged becomes rapidly higher than other parts, and changes discontinuously. Yes.

  On the other hand, in Embodiment 1, the bending stiffness is changed stepwise by increasing the length of the reinforcing cloths 14a, 14b, and 14c in order from the side closer to the bending center C to the side farther from the bending center C. Yes. That is, the bending rigidity is highest in the region near the center of the joint where the three reinforcing cloths 14a, 14b, and 14c exist in the thickness direction of the ear portions 11b and 11c.

  Next, since the reinforcing cloth 14a does not exist in the outer region, the bending rigidity is lowered by the amount corresponding to the reinforcing cloth 14a. Further, since the reinforcing cloth 14b does not exist in the outer region, the bending rigidity is lowered by the amount of the reinforcing cloths 14a and 14b.

  Accordingly, the bending rigidity discontinuity can be relaxed, and the stress concentration due to the bending rigidity discontinuity can be suppressed. Thereby, possibility that a crack will arise in the ear | edge parts 11b and 11c by repeated bending can be reduced.

  In addition, since all the reinforcing cloths 14a, 14b, and 14c are provided in the vicinity of the center of the connecting portion 11d, which is the most reinforced portion, as in the prior art, the strength of the connecting portion 11d is sufficiently ensured. be able to.

  Furthermore, the discontinuous bending which generate | occur | produces in the both ends of a reinforcement cloth area | region is relieve | moderated, and the fall of the design property by polygonal deformation can also be prevented.

Embodiment 2. FIG.
Next, FIG. 8 is a cross-sectional view of the connecting portion 11d according to the second embodiment of the present invention, and shows a cross section corresponding to the cross section taken along the line VV of FIG. In the second embodiment, when the handrail main body 11 is viewed with the opening 11a on the bottom, the reinforcing cloth 14c arranged at the bottom is extended upward at both ends in the longitudinal direction of the handrail main body 11. It has been.

  That is, if the difference in length between the reinforcing cloths 14a and 14b other than the lowermost reinforcing cloth 14c is Δd, the reinforcing cloth 14c is a linear reinforcement longer than the adjacent adjacent reinforcing cloth 14b by Δd. It has the cloth main body 14c-1 and the extension parts 14c-2 and 14c-3 extended outward from the longitudinal direction both ends of the reinforcing cloth main body 14c-1.

  And extension part 14c-2, 14c-3 inclines so that it may approach gradually the bending center C (FIG. 2) toward the front-end | tip which is an edge part on the opposite side from the reinforcement cloth main body 14c-1 side edge part. Yes. Moreover, the front-end | tip of extension part 14c-2 and 14c-3 is located in the substantially same position as the reinforcement cloth 14a about the thickness direction of the handrail main body 11. FIG.

  Further, the reinforcing cloths 14a, 14b, 14c are arranged so as to be shifted in the width direction (= X-axis direction) of the handrail body 11 with respect to the canvas 13 so that the extension portions 14c-2, 14c-3 do not interfere with the canvas 13. Has been. Other configurations are the same as those in the first embodiment.

  FIG. 9 is a graph showing the bending rigidity of the connecting portion 11d of FIG. It is known that the value of the bending stiffness for a certain cross section is a value proportional to the distance from the bending center, and the reinforcing cloth 14c on the outermost side also has the rigidity of the entire cross section for the reinforcing cloths 14a, 14b, and 14c. The most affected.

  On the other hand, in the second embodiment, the extension portions 14c-2 and 14c-3 of the outermost reinforcing cloth 14c are inclined in the direction in which their tips approach the bending center C, and thus the extension portion 14c. As −2, 14c-3 extends toward the bending center C, the value of rigidity decreases. Thereby, the discontinuity of the bending rigidity in the connecting portion 11d is further relaxed than in the first embodiment, and the stress concentration can be further suppressed.

Embodiment 3 FIG.
Next, FIG. 10 is a process diagram showing a method of manufacturing the moving handrail 5 according to the third embodiment of the present invention. The structure of the moving handrail 5 to be manufactured is the same as in the first or second embodiment. In the manufacturing method of the third embodiment, first, the resin that is the main material of the handrail body 11 is impregnated into the canvas 13 and the reinforcing cloths 14a, 14b, and 14c. Further, the outer shape of the moving handrail 5 is formed by extrusion processing with only the handrail main body 11 and the tensile body 12 (step S1).

  Next, the canvas 13 soaked with resin is attached to the inner surface of the handrail body 11. Then, heat is applied to the canvas 13 to apply pressure, and the canvas 13 is integrated with the handrail body 11 (step S2). Thereafter, both end portions of the intermediate body of the moving handrail 5 are joined as in the conventional case (step S3).

  Next, the reinforcing cloths 14a, 14b, and 14c are embedded in the ear portions 11b and 11c of the connecting portion 11d. At this time, first, a cut is made from above the canvas 13 in the portion where the reinforcing cloths 14a, 14b, 14c of the ear parts 11b, 11c are embedded (step S4). Then, the reinforcing cloths 14a, 14b, 14c soaked with resin are inserted into the notches, and pressure is applied to the handrail body 11 while applying heat from the outside, so that the reinforcing cloths 14a, 14b, 14c are integrated with the handrail body 11 (step) S5).

  According to such a manufacturing method of the moving handrail 5, the canvas 13 and the reinforcing cloths 14a, 14b, and 14c are integrated with the handrail main body 11 without using an adhesive, and the moving handrail 5 according to the first and second embodiments can be obtained. Can be obtained. For this reason, it becomes the adhesion | attachment state which does not interpose a foreign material like an adhesive agent, and can prevent the crack generation from a boundary surface. Moreover, a large stress concentration does not occur at the joints of materials against forced bending deformation when traveling in a curved section.

  Accordingly, the product is stable and the life against external factors is prolonged, and the reliability can be improved. In addition, it is not necessary to accurately control the thickness of the adhesive layer, which has been conventionally required.

Note that the number of reinforcing cloths arranged in each ear may be two or four or more.
The present invention can also be applied to a moving handrail on a moving sidewalk.

  5 Handrail, 11 Handrail body, 11a Opening, 11b, 11c Ear part, 11d Connecting part, 14a, 14b, 14c Reinforcing cloth.

Claims (4)

A pair of ears having a cross-sectional shape perpendicular to the longitudinal direction is a C-shape in which an opening is provided in an annular part, and is formed continuously along the longitudinal direction on both sides of the opening; An annular handrail body having a connecting portion provided in a part of the longitudinal direction, and a plurality of reinforcing cloths embedded in the ear portion of the connecting portion,
When the handrail main body is viewed with the opening facing down, the length of the reinforcing cloth in the longitudinal direction of the handrail main body is the lowermost from the reinforcing cloth disposed at the top. A moving handrail of the passenger conveyor that becomes longer in order toward the reinforcing cloth.   2. The passenger according to claim 1, wherein when the handrail main body is viewed with the opening facing down, the reinforcing cloth disposed at the bottom has the longitudinal ends of the handrail main body facing upward. Conveyor handrails. A pair of ears having a C-shaped cross-sectional shape perpendicular to the longitudinal direction and having an opening formed in a part of the ring, and continuously formed along the longitudinal direction on both sides of the opening; An annular handrail main body having a connecting portion provided in a part of the direction, and a plurality of reinforcing cloths embedded in the ear portion of the connecting portion,
When the handrail main body is viewed with the opening facing down, the length of the reinforcing cloth in the longitudinal direction of the handrail main body is the lowermost from the reinforcing cloth disposed at the top. It is a method for manufacturing a moving handrail of a passenger conveyor that is sequentially longer toward a reinforcing cloth,
A step of soaking the reinforcing cloth with the same resin as the main material of the handrail body;
A method for manufacturing a moving handrail for a passenger conveyor, comprising: embedding the reinforcing cloth in the ear part of the joint part; and heating the handrail body to integrate the handrail body and the reinforcing cloth.   The method of manufacturing a handrail for a passenger conveyor according to claim 3, wherein in the step of embedding the reinforcing cloth, a cut is made in the ear portion, and the reinforcing cloth is inserted into the cut.

Images