WO2007069312A1

WO2007069312A1 - Electromagnet device for elevator

Info

Publication number: WO2007069312A1
Application number: PCT/JP2005/022949
Authority: WO
Inventors: Hideki Nakashima
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-12-14
Filing date: 2005-12-14
Publication date: 2007-06-21

Abstract

An electromagnet device for an elevator includes a coil and leads connected to the coil. A heat-shrinkable tube is put on a junction part between the coil and the leads. Namely, the junction is surrounded with the heat-shrinkable tube. Further, the heat-shrinkable tube is shrunk by heat to tighten the junction. The electromagnet device is used, for example, for the brake device of an elevator hoist.

Description

Specification

Elevator electromagnetic magnet system

[0001] The present invention relates to an electromagnetic magnet device for an elevator provided in, for example, an electric motor or a brake device of an elevator hoisting machine. Background art

[0002] In a conventional electromagnetic magnet device, a mold material such as varnish or resin is injected between the electromagnetic coil and the shell to fix the electromagnetic coil to the shell. The mold material is injected between the electromagnetic coil and the shell, and then heated and cured. As a result, the electromagnetic coil is fixed to the shell (see, for example, Patent Document 1).

Patent Document 1: Japanese Patent Laid-Open No. 11 136911

Disclosure of the invention

Problems to be solved by the invention

[0004] However, in the conventional method of fixing an electromagnetic coil, it is necessary to perform complicated operations such as mixing a base material and a curing agent to create a mold material and performing weight management before starting the operation. is there. On the other hand, it is possible to fix the electromagnetic coil to the shell by screwing or adhesive without using molding material, but in this case, the waterproofness of the connection part between the coil and the lead wire is ensured. It takes time and effort. In other words, if the waterproofness of the connection part is not secured, the insulation resistance will decrease with time due to moisture in the usage environment, and the function as an electromagnetic magnet device will not be able to perform sufficiently, so ensuring the waterproofness. Needed to take enough time.

[0005] The present invention has been made to solve the above-described problems, and with a simple configuration, it is possible to ensure the waterproof property of the connection portion between the coil and the lead wire, thereby ensuring the waterproof property. The purpose is to obtain an electromagnetic magnet device for an elevator that can reduce the time and effort required to do the work.

Means for solving the problem

An elevator electromagnetic magnet device according to the present invention is connected to a coil and a coil. And a heat-shrinkable tube that surrounds the connection portion between the coil and the lead wire, shrinks when heated and tightens the connection portion.

Brief Description of Drawings

FIG. 1 is a perspective view showing an electromagnetic magnet device for an elevator according to Embodiment 1 of the present invention.

2 is an enlarged configuration diagram showing a connection portion between the coil and the lead wire in FIG. 1.

3 is a configuration diagram showing a state before heating of the first and second heat shrinkable tubes in FIG. 2. FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIG. 1 is a perspective view showing an electromagnetic magnet device for an elevator according to Embodiment 1 of the present invention, and shows an electromagnetic magnet device used for a brake device of an elevator hoisting machine. In the figure, for example, a plate-like shell (field) 1 made of a magnetic material such as iron is provided with a coil mounting portion la. The coil mounting portion la has a concave portion lb and a convex portion lc protruding from the center of the concave portion 1b.

[0009] A cylindrical bobbin 2 is mounted on the coil mounting portion la. A convex part lc is inserted inside the bobbin 2. A coil 3 is provided between the pair of flange portions of the bobbin 2. That is, the coil 3 is formed by winding an electric wire around the bobbin 2. A self-bonding enameled wire is used as the wire constituting coil 3. A self-bonding enameled wire is one in which an adhesive layer (for example, varnish) that melts by heating is superimposed on the surface of the enameled wire.

A pair of lead wires 4 a and 4 b for energizing the coil 3 is connected to the coil 3.

A connection fixture 5 is attached to the outer peripheral portion of the coil 3 to clamp and fix the connection portion between the coin 3 and the lead wires 4a and 4b between the coil 3 and the coil 3. The connection fixture 5 is bonded to the coil 3 with an adhesive, for example. The connection portion is located at the corner of the coil 3, and the connection fixture 5 is formed in a shape that conforms to the surface shape of the corner of the coil 3.

FIG. 2 is an enlarged configuration diagram showing a connection portion between the coil 3 and the lead wires 4a and 4b in FIG. The wires that make up the coil 3 consist of a winding start (first end) 3a and a winding end (second end). 3b. The lead wire 4a is fastened and electrically connected to the starting portion 3a by the first connection fitting 6a. Similarly, the lead wire 4b is fastened and electrically connected to the winding end portion 3b by the second connection fitting 6b. The connecting portion is pressed by the connecting portion fixture 5 in a direction substantially parallel to the axial direction of the coil 3.

[0012] The connecting portion between the starting portion 3a and the lead wire 4a is surrounded by the first heat-shrinkable tube 7a. A connection portion between the end portion 3b and the lead wire 4b is surrounded by a second heat shrinkable tube 7b. That is, the connection portion is covered with heat-shrinkable tubes (clamping members) 7a and 7b. Further, the heat shrinkable tubes 7a and 7b are shrunk by heat, thereby tightening the connecting portions.

[0013] As a material of the heat-shrinkable tubes 7a and 7b, for example, a polyolefin resin is used. The shrinkage temperature of the heat-shrinkable tubes 7a and 7b is, for example, 110 ° C or higher. The inner diameter shrinkage rate of the heat shrinkable tubes 7a and 7b is, for example, 60% or more.

[0014] A heat-melt adhesive 8 that is softened by heating is attached to the inner surfaces of the heat-shrinkable tubes 7a and 7b. As the adhesive 8, a thermoplastic varnish is used. The adhesive 8 is melted when the heat-shrinkable tubes 7a and 7b are heated and shrunk, and fills the gap between the heat-shrinkable tubes 7a and 7b and the connecting portion. Further, a part of the adhesive 8 flows out from the end portions of the heat-shrinkable tubes 7a and 7b by heating, and closes the end openings of the heat-shrinkable tubes 7a and 7b.

Next, a method for manufacturing the electromagnetic magnet device will be described. First, set bobbin 2 on the wire feeder (not shown). Then, the winding machine is operated, and the self-bonding enameled wire is wound around the bobbin 2 with a predetermined tension for a predetermined number of turns. After that, remove bobbin 2 from the wire feeder and energize the self-bonding enameled wire. As a result, the adhesive layer on the surface of the self-bonding enameled wire is melted, and the self-bonding enameled wires are fused together. Thereafter, the conduction is stopped and the adhesive layer is cured.

Thereafter, the bobbin 2 is fixed to the coil mounting portion la of the shell 1 with an adhesive. After fixing the bobbin 2 to the coil mounting part la, connect the lead wires 4a and 4b to the winding start part 3a and the winding end part 3b with the connecting fittings 6a and 6b. As the connection fittings 6a and 6b, for example, crimp sleeves that are crimped at the time of connection are used.

[0017] Insulation tape (not shown) for maintaining the insulation performance after connection with the connection fittings 6a and 6b Is wrapped around the connecting portion, and the heat-shrinkable tubes 7a and 7b are covered thereon. Fig. 3 is a block diagram showing the heat-condensing tubes 7a and 7b in Fig. 2 before heating. From the state shown in FIG. 3, the heat shrinkable tubes 7a and 7b are heated and shrunk. Heating can be performed, for example, by blowing warm air with a dryer or the like. Further, at the time of heating, it is preferable to confirm that the adhesive 8 is springing out from the ends of the heat-shrinkable tubes 7a and 7b in order to improve waterproofness. Finally, when the adhesive 8 is cured, the connection of the lead wires 4a and 4b is completed.

As described above, the method of manufacturing the electromagnetic magnet device includes the step of winding the self-bonding enamel wire around the bobbin 2 to form the coil 3, and energizing the self-bonding enamel wire to form the self-bonding enamel wire. The process of fusing together, the process of fixing the bobbin 2 to the coil mounting part la of the shell 1, the process of connecting the lead springs 4a and 4b to the inner 3, the connection between the inner 3 and the lead wires 4a and 4b It includes a step of covering the tubes 7a and 7b and a step of heating and shrinking the heat shrinkable tubes 7a and 7b.

[0019] In such an electromagnetic magnet device, the heat-shrinkable tubes 7a and 7b placed on the connection portion between the coin 3 and the lead wires 4a and 4b are heated and shrunk so that they can be connected with a simple and inexpensive configuration. It is possible to secure the waterproofness of the part, and to reduce the labor of the work for ensuring the waterproofness.

Further, since the adhesive 8 that is softened by heating is attached to the inner surfaces of the heat-shrinkable tubes 7a and 7b, the waterproofness of the connection portion can be ensured more reliably.

Furthermore, since the thermoplastic varnish is used as the adhesive 8, the watertightness can be sufficiently maintained to prevent cracks even at high temperatures, and the reliability can be improved.

[0020] Here, the electromagnetic magnet device of the first embodiment is used in a brake device of an elevator hoisting machine. The elevator hoisting machine has a drive sheave, an electric motor that rotates the drive sheave, and a brake device that brakes the rotation of the drive sheave. The brake device includes a brake shoe that frictionally brakes a rotating body that rotates integrally with the drive sheave, a brake spring that presses the brake shoe against the rotating body, and an electromagnetic that is piled on the brake spring to release the brake shoe from the rotating body. And a magnet device. A main rope for hanging a car and a counterweight is hung on the driving sheave. The car and counterweight are raised and lowered in the hoistway by rotating the drive sheave. The brake shoe must be energized to coil 3. It is released from the rotating body by the above, and is pressed against the rotating body by cutting off the power to the coil 3.

The method for fixing the bobbin 2 to the shell 1 is not particularly limited, and may be screwed, for example.

In the above example, the connecting metal 6a, 6b may be used to connect the lead wire 3a, the lead wire 3a and the lead wire 4a, 4b, for example, by soldering.

Further, the heating method of the heat-shrinkable tubes 7a and 7b is not particularly limited. For example, the lead wires 4a and 4b are connected to the coil 3 before the self-bonding enamel wires are fused to each other, and heat is applied to the connection portion. It is also possible to cover the shrinkable tubes 7a and 7b and then energize the self-bonding enameled wire, and simultaneously fuse the self-bonding enameled wires and heat the heat-shrinkable tubes 7a and 7b.

Furthermore, in the above example, an electromagnetic magnet device used for a brake device of an elevator hoisting machine is shown. However, for example, in addition to an electromagnetic magnet device used for an electric motor of an elevator hoisting machine or an elevator hoisting machine, The present invention can also be applied to an electromagnetic magnet device used in a brake device provided.

Claims

The scope of the claims

[1] Koinole,

A lead wire connected to the coil; and

A heat-shrinkable tube that surrounds the connection portion between the coil and the lead wire, and contracts by tightening the heat and tightens the connection portion.

Elevator electromagnetic magnet device.

[2] The elevator electromagnetic magnet device according to [1], wherein a heat-melt adhesive is attached to an inner surface of the heat shrinkable tube.

[3] The electromagnetic magnet device for an elevator according to claim 2, wherein a thermoplastic varnish is used as the adhesive.