JPH054310B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a moving road such as an escalator or a moving walkway that is driven by a linear motor. [Prior Art] Fig. 3 is a schematic side view of an escalator driven by a conventional linear motor as disclosed in, for example, Japanese Patent Publication No. 48-44478, and Fig. 4 is a cross-sectional view of the step board and linear motor. In Figures 3 and 4,
Reference numeral 1 denotes a moving body, a large number of which are connected in an endless manner by a chain 5. 2 is a guide roller that supports the treadle 1 on the frame 6; 3 is a secondary conductor of a linear motor attached to the shaft on which the guide roller 2 is mounted; 4 is a secondary conductor of a linear motor that is distributed between the outbound and return paths of the treadle 1 conveyance path. and a primary iron core of a pair of linear motors fixed to the frame 6,
A primary coil 7 is disposed between the grooves 4a of the primary core 4 and attached to the primary core 4. As shown in FIG. 4, a moving magnetic field is created by applying a three-phase alternating current to the primary coil 7 buried in the primary iron core 4, and the alternating current is used to control the speed of the footboard 1 by using an inverter or the like. You can do it freely. When a plate-shaped secondary conductor 3 is interposed between the primary cores 4, a thrust is generated in the secondary conductor 3 based on the same principle as a well-known induction motor, and the step board is driven. The motor shown in FIG. 4 is called a double-sided linear induction motor. [Problems to be Solved by the Invention] In conventional driving devices for moving roads such as escalators, in order to prevent the secondary conductor 3 from interfering with the reversed portions of the upper and lower portions of the conveyance path of the tread 1, it is necessary to 3 cannot be made very large, and as a result, there is a problem in that sufficient thrust cannot be obtained to drive the escalator. This invention was made in order to solve the above-mentioned problems, and it is an economical linear motor that can obtain sufficient thrust without separately providing a secondary conductor on a moving body such as a footboard. The object of the present invention is to obtain a driving system for a moving road. [Means for Solving the Problems] A driving device for a moving road according to the present invention has a primary core equipped with a primary coil of a linear motor arranged in a portion where the treads of a moving object such as a tread are aligned in a straight line. , the tread of the moving body is used as the secondary conductor of the linear motor. [Function] The driving device for a moving road according to the present invention focuses on the fact that moving bodies such as treads are made of a conductive material such as iron or aluminum, and that a plurality of moving bodies are lined up in a straight line on the return trip. By using the body itself as the secondary conductor of the linear motor, the secondary conductor does not interfere with the reversing portion of the conveyance path, and sufficient thrust can be obtained to drive a moving road such as an escalator.

【Example】

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic perspective view of the main parts of an escalator driven by a driving device according to an embodiment. In FIG. 1, the same reference numerals as those in FIG. 3 indicate the same or corresponding parts, and in this embodiment, the tread surfaces 1a of the plurality of tread boards 1 lined up on the return path of the conveyance path are on the tread surface 1a side of the portion where the treads 1a are lined up in a straight line on the inclined surface. A primary core 4 having a primary coil of a linear motor is arranged in parallel to face these, and is fixed to the frame 6 side, and the tread surface 1a of the tread plate 1 made of a conductive material such as iron or aluminum is connected to the linear motor. This is used as the secondary conductor of the motor. In this embodiment, a so-called single-sided linear induction motor is used. Figure 2 shows what is called a single-sided linear induction motor, with four primary cores.
The primary coil 7 attached thereto is only half of the double-sided type described above, and the primary core 4 is fixed to a frame not shown in FIG. In this invention, since the tread surface 1a of the tread plate 1 is made of aluminum or stainless steel plate, it becomes a secondary conductor that can be used as is, but in the case of aluminum, better thrust characteristics can be obtained by lining the back surface of the tread surface with a steel plate. It will be done. Furthermore, although the above explanation has been made regarding escalators, the present invention can also be applied to moving sidewalks that move horizontally.

【Effect of the invention】

As described above, according to the present invention, the portion where the treads of a moving body such as a large number of treads are lined up in a straight line on the return trip is used as a secondary conductor, and the part facing these treads is used as a secondary conductor to 1 with the next coil installed
Since the secondary conductor is provided, sufficient thrust can be obtained without separately providing a secondary conductor for each moving body, and an economical driving device for a moving road can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing the main parts of an escalator equipped with a drive device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a portion of a single-sided linear induction motor used in the present invention, and FIG. FIG. 4 is a schematic side view corresponding to FIG. 1 of an escalator equipped with a conventional drive device, and FIG. 4 is a cross-sectional view showing a double-sided linear induction motor. 1...Treadboard (moving body), 1a...Tread surface, 4...Primary iron core, 6...Frame, 7...Primary coil. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1 A moving body such as a large number of stepboards that are connected in an endless manner and made of conductive material such as iron or aluminum, a frame that supports these moving bodies, and a linear motor fixed to this frame. In a moving road equipped with a secondary coil, a primary iron core equipped with the primary coil is disposed in a portion where the treads of a plurality of moving bodies are lined up in a straight line on the return trip of the moving body, and the treads of the moving bodies are arranged in a straight line. A driving device for a moving road, characterized in that it is used as a secondary conductor of a linear motor.