JPS647957B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an endless step chain that is applied to running passenger conveyors such as escalators and moving passages, and in particular to a method for manufacturing a step chain that has improved toothed links constituting the step chain. This relates to a manufacturing method.

For passenger conveyors such as modular escalators and moving passages, a drive device is arranged between the steps of the straight section of the truss, and toothed links are connected endlessly to the lug rollers of the endless drive chain of this drive device. The step chains are meshed with each other, and the step chains are driven by a drive device to run the steps. In addition, the toothed link 1 of the step chain used in this type of passenger conveyor is generally
As shown in FIGS. 1 and 2, a first toothed link element 2 having teeth 2a and a second toothed link element 2 having teeth 3a.
The toothed link element 3 is shifted by several teeth in the longitudinal direction and overlapped, and this overlapped part is fastened with a rivet 4. At the ends of the toothed link elements 2 and 3, bearings 5 and 6 for step shafts, which also serve as connections with the mating toothed links 1 and 1, are attached, respectively. The toothed link 1 is generally made by progressively punching a steel band plate using a press to form the link material A shown in FIG. A plurality of sheets (8 in the example shown in Fig. 1)
It is constructed by laminating sheets).

However, in the conventional step chain, when the toothed link 1 is constructed by combining the first and second toothed link elements 2 and 3 formed by laminating punched link materials, the second toothed link element 3 In this case, the first toothed link element 2 is turned upside down and superimposed on the first toothed link 1. In this case, when the first toothed link element 2 is turned upside down and overlapped as the second toothed link element 3 as shown in Fig. 1, the teeth g and c that overlap each other at the overlapped part , f and d, and e and e must match with high precision, including the shape, and teeth a and b must also match b on the second toothed link element side of the toothed link that is connected to each other. The reversed teeth and the reversed teeth of a must each coincide and overlap, and the rivet holes m and n must also coincide. For this purpose, a mold for punching and forming the link material A is required to have extremely high precision.

If the precision of the mold is low and the teeth of the first toothed link element 2 and the second toothed link element 3 are uneven, that is, as shown in FIGS.
When there is a step between a and 3a, if these teeth engage with the lug roller of the drive chain, it will cause vibration and noise, and if the lug roller is made of an elastic material, it will cause local stress. This occurs in the lug rollers and shortens the life of the lug rollers.

In addition, when manufacturing high-precision molds, it is generally done using the wire cutting method, but experience shows that when creating tapes for wire cutting machines, slight mistakes may be made by the creator, and the metal molds are not always accurate. In addition to not necessarily being able to make a mold, wire-cut molds are expensive, so there was a problem that even if there was a slight accuracy defect, the product could be used as is.

The present invention solves the above-mentioned problems, and even if the precision of the die for punching the link material is low, the first toothed link element and the second toothed link element constituting the toothed link can be To provide a manufacturing method for inexpensively obtaining a step chain whose teeth can be made to match with high precision and also to make the teeth of overlapping parts of toothed links that are connected to each other match.

The method of manufacturing a step chain for a passenger conveyor according to the present invention is to produce a continuous band-shaped toothed link material by progressively punching and forming a band steel plate in accordance with the step pitch using the same die, A first toothed link element is cut at a position separated by a first distance in a first direction from the bearing hole to match the step pitch, and the toothed link material continuous in a band is cut from the step bearing hole. , a second toothed link element is cut at a position separated by a second interval different from the first interval in the first direction to match the step pitch, and the first and second toothed link elements are Toothed link elements are punched and formed using the same mold, and the teeth are overlapped so that the punching directions are the same.To form a toothed link, by connecting a large number of these toothed links to each other, an endless shape can be created. It is designed to form a chain of steps.

In the manufacturing method according to the present invention, the first and second toothed link elements of the toothed link are cut at different positions with respect to the step bearing hole, so that the toothed link elements are cut at the overlapped portion of both link elements. and rivet holes punched and formed by the same mold can be overlapped with the punching direction in the same direction, and by overlapping in this way, the mold for forming the toothed link material can be Even if the accuracy is low, each tooth in the overlapping portion and the connecting portion of the first and second toothed link elements can be accurately aligned, and unlike the conventional method, the punched toothed link material can be Since the second toothed link is not turned over, strict precision is not required for the mold.

Hereinafter, specific embodiments of this invention will be described in Figs. 5 to 1.
This will be explained based on Figure 0.

FIG. 5 shows a toothed link material for constructing the first toothed link element, and this toothed link material 10 is produced by progressively punching a steel band plate with the same die in accordance with the step pitch. It is molded into a continuous band shape. Step bearing holes 11 are drilled in this continuous band-like toothed link 10 at the same intervals as the step pitches, and a plurality of rivet holes 12m, 12n, The teeth 12o are also bored at equal intervals, and the teeth are repeated in a wavy manner.

Band-shaped toothed link material 10 made in this way
is cut by the cutting punch 13 at a position spaced apart from the step bearing hole 11 by a predetermined distance to the left side of the step bearing hole 11.
The first toothed link element 14 is formed into the shape and tooth arrangement shown in the figure.

FIG. 7 shows a toothed link material for constructing the second toothed link element, and this toothed link material 10 is the same as that shown in FIG. 5, and this band-shaped toothed link The material 10 is inserted into the step bearing hole 11.
It is cut with a cutting punch 13 at a position far from the cutting position when forming the first element in the left direction of the link, and is formed into the shape and tooth row shown in FIG. Let it be element 15.

The toothed link 16 is composed of a first toothed link element 14 made up of a plurality of overlapping elements shown in FIG. 6, and a second toothed link element 15 made up of a plurality of overlapping elements shown in FIG. When superimposed as shown in FIGS. 9 and 10, each toothed link element 1
The rivet holes 12m, 12n, 12o of 4 and 15 and the teeth c to g overlap with each other with high precision, and the teeth a to b of the first toothed link element 14 are connected to the toothed link connected thereto. 16 (indicated by the two-dot chain line), the teeth a and b of the second toothed link element 15 overlap with each other. The first and second toothed link elements 14 and 15 are overlapped with each other.
This is because the teeth and rivet holes in the overlapping portions and connecting portions are punched and formed using the same die, and the punching directions are the same so that the teeth and rivet holes are overlapped with each other.

As explained above, in the present invention, the teeth and rivet holes of the first and second toothed link elements of the toothed link constituting the step chain are made of the same mold at the overlapping portion and the connecting portion. Since the punched and formed pieces are overlapped with each other with the same punching direction, even if the precision of the mold for molding the toothed link material is low, each overlap of the first and second toothed link elements can be easily It is possible to accurately align each tooth in the sections and the connecting sections, which reduces vibration and noise when the lug rollers of the drive chain engage compared to step chains obtained by conventional manufacturing methods. The lifespan of can be extended. Furthermore, since the mold does not require strict precision, it has the effect of reducing its cost.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional toothed link of a step chain, Fig. 2 is a side view thereof, Fig. 3 is a side view of a toothed link material constituting a conventional toothed link, and Figs. 4 a and b. is an enlarged cross-sectional view of the portion lined with - in FIG. 2, FIG. 5 is a plan view of the link material for the first toothed link element constituting the toothed link of the step chain according to the present invention, and FIG. 6 is the diagram of the present invention. FIG. 7 is a plan view of the link material for the second toothed link element constituting the toothed link of the present invention, and FIG. 8 is a plan view of the second toothed link element of the present invention. FIG. 9 is a plan view of a toothed link element, FIG. 9 is a plan view of a toothed link constructed by the manufacturing method of the present invention, and FIG. 10 is a side view thereof. 10... Toothed link material, 11... Step bearing hole, 12
m, 12n, 12o...Rivet hole, a~g...Teeth,
14...First toothed link element, 15...Second toothed link element, 16...Toothed link. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 A toothed link material in which a steel band is progressively punched using the same mold to match the step pitch, and a step bearing hole, a rivet hole located between adjacent step bearing holes, and continuous teeth on one side are formed. and cut the toothed link material at a position spaced apart from the step bearing hole by a first distance in a first direction to create a first toothed link element, and cut the toothed link material into the step bearing hole. A second cut is made by cutting from the bearing hole in the first direction at a position separated by a second interval different from the first interval.
A toothed link element is made, and the first and second toothed link elements are stacked so that the teeth punched and formed with the same mold are oriented in the same punching direction,
A passenger conveyor characterized in that the overlapping portions of the first and second toothed link elements are fastened together with rivets passed through rivet holes to form a toothed link, and a large number of these toothed links are connected in an endless manner. A method of manufacturing step chains.