EP1988051B1 - Brake unit of elevator hoist machine and process for manufacturing the same - Google Patents
Brake unit of elevator hoist machine and process for manufacturing the same Download PDFInfo
- Publication number
- EP1988051B1 EP1988051B1 EP06714289.3A EP06714289A EP1988051B1 EP 1988051 B1 EP1988051 B1 EP 1988051B1 EP 06714289 A EP06714289 A EP 06714289A EP 1988051 B1 EP1988051 B1 EP 1988051B1
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- EP
- European Patent Office
- Prior art keywords
- self
- wire
- prepreg tape
- melting
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title description 11
- 238000002844 melting Methods 0.000 claims description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 239000011521 glass Substances 0.000 claims description 34
- 239000011347 resin Substances 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 31
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims 2
- 239000004744 fabric Substances 0.000 description 24
- 230000002093 peripheral effect Effects 0.000 description 11
- 238000003825 pressing Methods 0.000 description 8
- 239000003522 acrylic cement Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
- B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
Definitions
- the present invention relates to a braking device for braking the turning of a driving sheave of an elevator traction machine and a manufacturing method therefor.
- a braking device for braking the turning of a driving sheave of an elevator traction machine there is available a braking device that is arranged in a rotor drum turning in association with the driving sheave so that a brake is operated, namely, a braking force is generated by pressing a brake lining on the inner peripheral surface (braking surface) of the rotor drum.
- the braking device having the above-described construction is especially used for a thin traction machine provided in an elevator shaft of a machine room-less elevator system.
- the braking device having such a construction usually includes a pressing spring for operating the brake by pressing the brake lining on the inner peripheral surface of rotor drum, and an electromagnet for releasing the brake by moving the brake lining against the urging force of the pressing spring.
- the present invention has been made to solve the above problems, and accordingly an object thereof is to provide a braking device for an elevator traction machine, which can be made thin and small easily and has high reliability and productivity, and a manufacturing method therefor.
- a braking device for an elevator traction machine comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, and a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape.
- a braking device for an elevator traction machine comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape, and a fixed iron core provided in a rotor drum turning in association with a driving sheave of elevator, to which the bobbin is fixed.
- a manufacturing method for a braking device for an elevator traction machine comprises the steps of winding a self-melting wire a predetermined number of turns on a bobbin, winding a prepreg tape on the outside of the self-melting wire, winding a glass tape on the outside of the prepreg tape to fix a wire connecting portion in which a lead wire is connected to the self-melting wire to the prepreg tape, and melting the self-melting wire by energizing the self-melting wire, and sticking the glass tape fast to the prepreg tape by the resin impregnated into the prepreg tape.
- the present invention is configured so that the braking device comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, and a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape.
- the braking device can be made thin and small easily and has high reliability and productivity.
- Figure 1 is a front view of a braking device for an elevator traction machine in embodiment 1 of the present invention.
- reference numeral 1 denotes a housing of a thin traction machine provided in an elevator shaft of a machine room-less elevator system
- 2 denotes a rotor drum that turns in association with a driving sheave (not shown) around which a main rope (not shown) of elevator is set
- 3 denotes a braking device that is provided in the rotor drum 2 to brake the turning of the rotor drum 2 (driving sheave).
- the braking device 3 includes a brake lining 4 arranged so as to face to the inner peripheral surface (braking surface) of the rotor drum 2, a moving iron core 6 that supports the brake lining 4 via spherical washers 5, a fixed iron core 7 that is arranged so as to face to the moving iron core 6 and fixed to the housing 1 via a fixing member etc., a magnet coil 8 provided on one side surface 7a facing to the moving iron core 6 of the fixed iron core 7, and pressing springs 9 that are provided in the fixed iron core 7 to always urge the moving iron core 6 toward the outside so as to press the brake lining 4 on the inner peripheral surface of the rotor drum 2.
- the brake lining 4 is pressed on the inner peripheral surface of the rotor drum 2 by the urging force of the pressing springs 9, by which a braking force is generated and hence a brake is operated. Also, the magnet coil 8 is energized and hence the attraction force of electromagnet is generated, by which the moving iron core 6 is moved to the one side surface 7a side of the fixed iron core 7 against the urging force of the pressing spring 9, and thereby the brake is released. When the brake is released, a predetermined gap is formed between the inner peripheral surface of the rotor drum 2 and the brake lining 4.
- Figure 2 is a view taken in the direction of the arrows along the line A-A of Figure 1
- Figure 3 is a detail view of portion B in Figure 2
- Figure 4 is a view taken in the direction of the arrows along the line C-C of Figure 2
- Figure 5 is a detail view of the magnet coil shown in Figure 4 .
- Figures 2 to 5 show the construction of an electromagnet of the braking device 3 provided with the fixed iron core 7 and the magnet coil 8.
- the fixed iron core 7 has a substantially rectangular shape such that the one side surface 7a facing to the moving iron core 6 is long in the up and down direction and short in the thickness direction (the right and left direction of the one side surface 7a) of the traction machine (the braking device 3), and on the one side surface 7a, a storage portion 7b in which the magnet coil 8 is stored and fixed is formed by cutting etc.
- the magnet coil 8 includes a substantially rectangular ring-shaped resin-made bobbin 10 having a high slenderness ratio, which is long in the up and down direction and short in the right and left direction (the thickness direction of traction machine), a self-melting wire 11 that is wound a predetermined number of turns in a coil form and meltedly installed in a U-shaped portion of the resin-made bobbin 10, an insulating prepreg tape 12 that is wound several turns on the outside of the self-melting wire 11 so as to cover the whole of the outer peripheral surface of the self-melting wire 11 wound in a coil shape on the resin-made bobbin 10, a wire connecting portion 14 in which a lead wire 13 is connected to the self-melting wire 11, a resin-made holder 15 for protecting and insulating the wire connecting portion 14 by covering the whole of the wire connecting portion 14 from the outside of the prepreg tape 12, and a glass cloth tape 16 forming the outermost layer, which is wound on the outside of the prepreg tape 12 and the resin-made
- the resin-made bobbin 10 is manufactured, for example, by using an injection molding machine, and has predetermined insulating properties. Also, since the resin-made bobbin 10 has a substantially rectangular ring shape having a high slenderness ratio, the self-melting wire 11 and the like wound in a coil form on the resin-made bobbin 10 also have a substantially rectangular ring shape having a high slenderness ratio, which is long in the up and down direction and short in the right and left direction, and each of the corner portions thereof is formed by a curved surface having a predetermined curvature. On the outside of one corner portion having a curved surface shape of the self-melting wire 11 wound in a coil form, the wire connecting portion 14 and the resin-made holder 15 are provided.
- the wire connecting portion 14 and the resin-made holder 15 are arranged so as not to project in the up and down direction and in the right and left direction by wrapping the resin-made holder 15 to the inside with the glass cloth tape 16 wound on the outside of the resin-made holder 15. That is to say, the wire connecting portion 14 and the resin-made holder 15 are arranged so that the width in the up and down direction and the width in the right and left direction of the magnet coil 8 are uniform regardless of the presence of the resin-made holder 15.
- the prepreg tape 12 and the glass cloth tape 16 are wound so as to have a width slightly wider than the U-shaped portion of the resin-made bobbin 10, and both edge portions thereof are bent so as to face to side surfaces in the U-shaped portion of the resin-made bobbin 10.
- the magnet coil 8 having the above-described construction is arranged in the storage portion 7b and is fixed to the fixed iron core 7 by bonding the resin-made bobbin 10 to the fixed iron core 7.
- a cold-setting two-component acrylic adhesive 17 is used to fix the resin-made bobbin 10 to the fixed iron core 7.
- the cold-setting two-component acrylic adhesive 17 is filled into a gap between the resin-made bobbin 10 and the fixed iron core 7 so that the whole of the inner peripheral surface and one side surface of the resin-made bobbin 10 is fixed by the cold-setting two-component acrylic adhesive 17.
- the self-melting wire 11 is wound a predetermined number of turns in a coil form in the U-shaped portion of the resin-made bobbin 10 by using a winding machine (not shown).
- the prepreg tape 12 that has been treated into a semi-hardened state by impregnating a resin into a heat-resistant substrate is wound several turns on the outside of the self-melting wire 11 so as to cover the whole of the outer peripheral surface of the self-melting wire 11 wound in a coil form on the resin-made bobbin 10.
- the resin-made holder 15 is arranged on the self-melting wire 11 so as to cover the whole of the wire connecting portion 14 to which the lead wire 13 is connected, and the glass cloth tape 16 is wound on the outside of the prepreg tape 12 so as to wrap the resin-made holder 15 to the inside, by which the wire connecting portion 14 and the resin-made holder 15 are fixed to the prepreg tape 12.
- the self-melting wire 11 After the self-melting wire 11, the prepreg tape 12, and the glass cloth tape 16 have been wound in the U-shaped portion of the resin-made bobbin 10, a pressure is applied to the glass cloth tape 16 forming the outermost layer from the outside to the inside, namely, to the prepreg tape 12 side, and the self-melting wire 11 is energized while this pressure applying state is maintained.
- Figure 6 is an explanatory view for explaining the manufacturing method for the braking device for an elevator traction machine in embodiment 1 of the present invention, showing a state in which a pressure is applied to the glass cloth tape 16 from the outside before the self-melting wire 11 is energized.
- symbols 18a to 18d denote pressure plates that are arranged in the centers of long sides and in the centers of short sides of the magnet coil 8 having a substantially rectangular ring shape to apply a pressure to the glass cloth tape 16 toward the inside from four directions with a predetermined force.
- the pressure plates 18a and 18b arranged in the centers of long sides of the magnet coil 8 and the pressure plates 18c and 18d arranged in the centers of short sides of the magnet coil 8 apply pressures to the glass cloth tape 16 so that a distance between pressure surfaces contacting with the glass cloth tape 16 takes a predetermined value.
- the pressure surfaces of the pressure plates 18a to 18d are arranged so as to come into contact with the glass cloth tape 16 only when the pressures are applied.
- the self-melting wire 11 By energizing the self-melting wire 11, the self-melting wire 11 is heated, and the resin of the self-melting wire 11 is melted. Also, the self-melting wire 11 is heated and hence the prepreg tape 12 is heated, by which the resin impregnated into the prepreg tape 12 is also melted. Therefore, by energizing the self-melting wire 11, the glass cloth tape 16 is stuck fast to the prepreg tape 12 by the resin impregnated into the prepreg tape 12.
- a gap formed between the self-melting wires 11 are filled with the resin, and by the melting of the resin impregnated into the prepreg tape 12, a gap formed between the self-melting wire 11 and the prepreg tape 12 and a gap formed between the prepreg tape 12 and the glass cloth tape 16 are filled with the resin.
- the pressure plates 18a to 18d are separated from the surface of the glass cloth tape 16 and are removed, and the magnet coil 8 is arranged at a predetermined position in the storage portion 7b of the fixed iron core 7.
- the pressure plates 18a to 18d are arranged so that the pressure surfaces come into contact with the glass cloth tape 16 only, a trouble such that the prepreg tape 12 and the pressure plates 18a to 18d are stuck fast to each other by the resin impregnated into the prepreg tape 12 when the self-melting wire 11 is energized so that the pressure plates 18a to 18d cannot be removed, or that the surface state of the prepreg tape 12 is deteriorated when the pressure plates 18a to 18d are removed so that the insulating properties cannot be secured can be prevented.
- the cold-setting two-component acrylic adhesive 17 is filled into a gap formed between the resin-made bobbin 10 and the fixed iron core 7, and thereby a predetermined surface of the resin-made bobbin 10 is bondingly fixed to the fixed iron core 7.
- the braking device 3 manufactured by the above-described manufacturing method can be made thin and small easily, and has high reliability and productivity.
- a predetermined thickness of mold resin is not needed, so that the magnet coil 8 can be made thin and small easily.
- the resin-made bobbin 10 Since the resin-made bobbin 10 has a substantially rectangular ring shape having a high slenderness ratio, when the self-melting wire 11, etc. are wound on the resin-made bobbin 10, the center of long side and the center of short side tend to expand to the outside. Therefore, by applying a pressure from the outside using the pressure plates 18a to 18d when the self-melting wire 11 is energized, the widths in the up and down direction and the right and left direction of the magnet coil 8 can be kept within a predetermined size, and thereby the braking device 3 can be made thin and small.
- the wire connecting portion 14 and the resin-made holder 15 are arranged on the outside of one corner portion having a curved surface shape of the self-melting wire 11 and do not project in the up and down direction and the right and left direction of the magnet coil 8, a part of the magnet coil 8 does not protrude from the fixed iron core 7, and also the area of one side surface 7a of the fixed iron core 7, which exerts a great influence on the brake characteristics because it stores the magnet coil 8, need not be reduced or changed.
- the reliability of the braking device 3 functions of protection, fixture, and heat release of the coil (the self-melting wire 11) and the wire connecting portion 14, which have conventionally provided by the mold resin, can be fulfilled sufficiently even by the above-described method. Specifically, the protection and insulation of the self-melting wire 11 can be secured sufficiently by the prepreg tape 12 wound on the outside of the self-melting wire 11.
- the prepreg tape 12 is wound so as to have a width slightly wider than the width of the U-shaped portion of the resin-made bobbin 10, even if the positions of the self-melting wire 11 and the prepreg tape 12 somewhat shift at the time of melting, the self-melting wire 11 is not exposed, so that the self-melting wire 11 can be protected and insulated surely.
- the wire connecting portion 14 is surely protected from a shock and vibration applied from the outside by the resin-made holder 15.
- the outer peripheral surface of the resin-made holder 15 is fixed by the adhesion force of the glass cloth tape 16, and the glass cloth tape 16 for fixing the resin-made holder 15 is stuck fast to the prepreg tape 12 by melting the resin impregnated into the prepreg tape 12. Therefore, the resin-made holder 15 is fixed surely to prevent the positional shift of the wire connecting portion 14, and thereby the deterioration in insulating properties caused by the positional shift of the wire connecting portion 14 can be prevented surely.
- the glass cloth tape 16 Since a pressure is applied to the glass cloth tape 16 toward the inside, namely, toward the prepreg tape 12 side by the pressure plates 18a to 18d when the self-melting wire 11 is energized, the glass cloth tape 16 can be fixed surely to the prepreg tape 12.
- the length of the self-melting wire 11 coming from the portion wound in a coil shape to the outside can be decreased as compared with the case where the wire connecting portion 14 is provided at a place separate from the portion wound in a coil form of the self-melting wire 11, so that the protecting construction can be simplified and the reliability of insulation can be increased.
- the lead wire 13 is staked to the self-melting wire 11, and thereafter the staking portion is insulated by an insulating tape, insulating tube, or the like.
- the resin-made bobbin 10 is manufactured by using an injection molding machine etc., at the time of cooling after molding, deformation such as warp or torsion occurs. Therefore, when the resin-made bobbin 10 is fixed to the fixed iron core 7, the method is used in which the cold-setting two-component acrylic adhesive 17 is filled into the gap formed between the resin-made bobbin 10 and the fixed iron core 7, by which the load is distributed to the whole of the attachment surface of the resin-made bobbin 10 to release stresses, and thereby damage to the resin-made bobbin 10 caused by stress concentration, creep, or the like can be prevented.
- the gap between the self-melting wires 11, the gap between the self-melting wire 11 and the resin-made bobbin 10, the gap between the self-melting wire 11 and the prepreg tape 12, and the gap between the prepreg tape 12 and the glass cloth tape 16 are filled with the resin, sufficient thermal conductivity is secured, and thereby the Joule's heat generated in the self-melting wire 11 when the brake is applied can be released to the outside efficiently. Since the gap formed between the resin-made bobbin 10 and the fixed iron core 7 is filled with the cold-setting two-component acrylic adhesive 17, the thermal conductivity between the resin-made bobbin 10 and the fixed iron core 7 can also be secured sufficiently.
- the Joule's heat generated in the self-melting wire 11 when the brake is applied can also be transmitted to the fixed iron core 7 efficiently, so that a local rise in temperature of the portion formed into a coil shape of the self-melting wire 11 can also be prevented.
- the electromagnet can be manufactured by a step of winding the self-melting wire 11, the prepreg tape 12, and the glass cloth tape 16, a step of melting the resin of the self-melting wire 11 by the energization of the self-melting wire 11 and melting the resin impregnated into the prepreg tape 12 to stick the glass cloth tape 16 fast to the prepreg tape 12, and a step of bonding the magnet coil 8 to the fixed iron core 7.
- the manufacturing process can be simplified, and the manufacturing time can be shortened.
- the fixing of the glass cloth tape 16 can be performed with the melting of the resin of the self-melting wire 11 and the resin impregnated into the prepreg tape 12, so that the work process can be simplified significantly.
- the braking device for an elevator traction machine in accordance with the present invention can be made thin and small easily, so that the elevator traction machine itself can be made thin and small. Therefore, the present invention achieves effects especially in a machine room-less elevator system in which the installation space of the traction machine is limited. Also, since the braking device has high reliability and productivity, various effects such as a reduction in cost and a shortened delivery period can be anticipated.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Braking Arrangements (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Electromagnets (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Description
- The present invention relates to a braking device for braking the turning of a driving sheave of an elevator traction machine and a manufacturing method therefor.
- As a braking device for braking the turning of a driving sheave of an elevator traction machine, there is available a braking device that is arranged in a rotor drum turning in association with the driving sheave so that a brake is operated, namely, a braking force is generated by pressing a brake lining on the inner peripheral surface (braking surface) of the rotor drum. The braking device having the above-described construction is especially used for a thin traction machine provided in an elevator shaft of a machine room-less elevator system. The braking device having such a construction usually includes a pressing spring for operating the brake by pressing the brake lining on the inner peripheral surface of rotor drum, and an electromagnet for releasing the brake by moving the brake lining against the urging force of the pressing spring.
- Also, as a conventional art of the brake device, there has been disclosed a molding method for fixing a magnet coil of the electromagnet to a shell, in which after the magnet coil has been arranged in the shell, a resin composition is poured to between the shell and the magnet coil, and these elements are put into a thermostatic oven to heat harden the resin composition (for example, refer to Patent Document 1).
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- Patent Document 1: Japanese Patent Laid-Open No.
H11-136911 Figure 3 ) - Patent Document 2:
JP 2005 194076 A claim 1. - In the case where a method in which a mold resin is poured and heat hardened is used as a method for fixing the magnet coil to the shell as described in
Patent Document 1, a predetermined peel strength and a thickness not smaller than a predetermined size capable of resisting a shock of some degree are required for the mold resin, so that the requirement has been a cause for a hindrance to making the braking device small and thin. Also, in the above-described molding method, many various manufacturing steps such as mixing and agitating of mold resin before pouring, preheating of the mold resin and shell, pouring, heating in the thermostatic oven, and edge treatment after the hardening of mold resin are needed, which arises a problem of remarkably decreased productivity. - The present invention has been made to solve the above problems, and accordingly an object thereof is to provide a braking device for an elevator traction machine, which can be made thin and small easily and has high reliability and productivity, and a manufacturing method therefor.
- A braking device for an elevator traction machine comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, and a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape.
- A braking device for an elevator traction machine comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape, and a fixed iron core provided in a rotor drum turning in association with a driving sheave of elevator, to which the bobbin is fixed.
- A manufacturing method for a braking device for an elevator traction machine comprises the steps of winding a self-melting wire a predetermined number of turns on a bobbin, winding a prepreg tape on the outside of the self-melting wire, winding a glass tape on the outside of the prepreg tape to fix a wire connecting portion in which a lead wire is connected to the self-melting wire to the prepreg tape, and melting the self-melting wire by energizing the self-melting wire, and sticking the glass tape fast to the prepreg tape by the resin impregnated into the prepreg tape.
- The present invention is configured so that the braking device comprises a self-melting wire wound a predetermined number of turns on a bobbin and melted, a prepreg tape wound on the outside of the self-melting wire, a wire connecting portion in which a lead wire is connected to the self-melting wire, and a glass tape stuck fast to the prepreg tape by the resin impregnated into the prepreg tape to fix the wire connecting portion to the prepreg tape. Thereupon, the braking device can be made thin and small easily and has high reliability and productivity.
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Figure 1 is a front view of a braking device for an elevator traction machine inembodiment 1 of the present invention. -
Figure 2 is a view taken in the direction of the arrows along the line A-A ofFigure 1 . -
Figure 3 is a detail view of portion B inFigure 2 . -
Figure 4 is a view taken in the direction of the arrows along the line C-C ofFigure 2 . -
Figure 5 is a detail view of the magnet coil shown inFigure 4 . -
Figure 6 is an explanatory view for explaining the manufacturing method for the braking device for an elevator traction machine inembodiment 1 of the present invention. -
- 1 housing, 2 rotor drum, 3 braking device, 4 brake lining,
- 5 spherical washer, 6 moving iron core, 7 fixed iron core,
- 7a one side surface, 7b storage portion, 8 magnet coil,
- 9 pressing spring, 10 resin-made bobbin, 11 self-melting wire,
- 12 prepreg tape, 13 lead wire, 14 wire connecting portion,
- 15 resin-made holder, 16 glass cloth tape,
- 17 cold-setting two-component acrylic adhesive 18a pressure plate,
- 18b pressure plate, 18c pressure plate, 18d pressure plate
- The present invention will now be described in more detail with reference to the accompanying drawings. In the figures, the same symbols are applied to the identical or equivalent elements, and a duplicated explanation thereof is simplified or omitted.
-
Figure 1 is a front view of a braking device for an elevator traction machine inembodiment 1 of the present invention. InFigure 1 ,reference numeral 1 denotes a housing of a thin traction machine provided in an elevator shaft of a machine room-less elevator system, 2 denotes a rotor drum that turns in association with a driving sheave (not shown) around which a main rope (not shown) of elevator is set, and 3 denotes a braking device that is provided in therotor drum 2 to brake the turning of the rotor drum 2 (driving sheave). - The
braking device 3 includes abrake lining 4 arranged so as to face to the inner peripheral surface (braking surface) of therotor drum 2, a movingiron core 6 that supports thebrake lining 4 viaspherical washers 5, afixed iron core 7 that is arranged so as to face to the movingiron core 6 and fixed to thehousing 1 via a fixing member etc., amagnet coil 8 provided on one side surface 7a facing to the movingiron core 6 of the fixediron core 7, and pressingsprings 9 that are provided in the fixediron core 7 to always urge the movingiron core 6 toward the outside so as to press thebrake lining 4 on the inner peripheral surface of therotor drum 2. In thebraking device 3 having the above-described construction, thebrake lining 4 is pressed on the inner peripheral surface of therotor drum 2 by the urging force of thepressing springs 9, by which a braking force is generated and hence a brake is operated. Also, themagnet coil 8 is energized and hence the attraction force of electromagnet is generated, by which the movingiron core 6 is moved to the one side surface 7a side of the fixediron core 7 against the urging force of thepressing spring 9, and thereby the brake is released. When the brake is released, a predetermined gap is formed between the inner peripheral surface of therotor drum 2 and thebrake lining 4. - Also,
Figure 2 is a view taken in the direction of the arrows along the line A-A ofFigure 1 ,Figure 3 is a detail view of portion B inFigure 2 ,Figure 4 is a view taken in the direction of the arrows along the line C-C ofFigure 2 , andFigure 5 is a detail view of the magnet coil shown inFigure 4 .Figures 2 to 5 show the construction of an electromagnet of thebraking device 3 provided with the fixediron core 7 and themagnet coil 8. InFigures 2 to 5 , the fixediron core 7 has a substantially rectangular shape such that the one side surface 7a facing to the movingiron core 6 is long in the up and down direction and short in the thickness direction (the right and left direction of the one side surface 7a) of the traction machine (the braking device 3), and on the one side surface 7a, astorage portion 7b in which themagnet coil 8 is stored and fixed is formed by cutting etc. - The
magnet coil 8 includes a substantially rectangular ring-shaped resin-madebobbin 10 having a high slenderness ratio, which is long in the up and down direction and short in the right and left direction (the thickness direction of traction machine), a self-meltingwire 11 that is wound a predetermined number of turns in a coil form and meltedly installed in a U-shaped portion of the resin-madebobbin 10, aninsulating prepreg tape 12 that is wound several turns on the outside of the self-meltingwire 11 so as to cover the whole of the outer peripheral surface of the self-meltingwire 11 wound in a coil shape on the resin-madebobbin 10, awire connecting portion 14 in which alead wire 13 is connected to the self-meltingwire 11, a resin-madeholder 15 for protecting and insulating thewire connecting portion 14 by covering the whole of thewire connecting portion 14 from the outside of theprepreg tape 12, and aglass cloth tape 16 forming the outermost layer, which is wound on the outside of theprepreg tape 12 and the resin-madeholder 15 to fix thewire connecting portion 14 and the resin-madeholder 15 to theprepreg tape 12, and is stuck fast to theprepreg tape 12 by the resin having been impregnated into theprepreg tape 12. - The resin-made
bobbin 10 is manufactured, for example, by using an injection molding machine, and has predetermined insulating properties. Also, since the resin-madebobbin 10 has a substantially rectangular ring shape having a high slenderness ratio, the self-meltingwire 11 and the like wound in a coil form on the resin-madebobbin 10 also have a substantially rectangular ring shape having a high slenderness ratio, which is long in the up and down direction and short in the right and left direction, and each of the corner portions thereof is formed by a curved surface having a predetermined curvature. On the outside of one corner portion having a curved surface shape of the self-meltingwire 11 wound in a coil form, thewire connecting portion 14 and the resin-madeholder 15 are provided. Thewire connecting portion 14 and the resin-madeholder 15 are arranged so as not to project in the up and down direction and in the right and left direction by wrapping the resin-madeholder 15 to the inside with theglass cloth tape 16 wound on the outside of the resin-madeholder 15. That is to say, thewire connecting portion 14 and the resin-madeholder 15 are arranged so that the width in the up and down direction and the width in the right and left direction of themagnet coil 8 are uniform regardless of the presence of the resin-madeholder 15. - Also, the
prepreg tape 12 and theglass cloth tape 16 are wound so as to have a width slightly wider than the U-shaped portion of the resin-madebobbin 10, and both edge portions thereof are bent so as to face to side surfaces in the U-shaped portion of the resin-madebobbin 10. - The
magnet coil 8 having the above-described construction is arranged in thestorage portion 7b and is fixed to the fixediron core 7 by bonding the resin-madebobbin 10 to the fixediron core 7. To fix the resin-madebobbin 10 to the fixediron core 7, for example, a cold-setting two-componentacrylic adhesive 17 is used. To secure a predetermined bonding area, for example, the cold-setting two-componentacrylic adhesive 17 is filled into a gap between the resin-madebobbin 10 and the fixediron core 7 so that the whole of the inner peripheral surface and one side surface of the resin-madebobbin 10 is fixed by the cold-setting two-componentacrylic adhesive 17. - Next, a manufacturing method for the
braking device 3 having the above-described construction is explained. In manufacturing the electromagnet, first, the self-meltingwire 11 is wound a predetermined number of turns in a coil form in the U-shaped portion of the resin-madebobbin 10 by using a winding machine (not shown). Next, theprepreg tape 12 that has been treated into a semi-hardened state by impregnating a resin into a heat-resistant substrate is wound several turns on the outside of the self-meltingwire 11 so as to cover the whole of the outer peripheral surface of the self-meltingwire 11 wound in a coil form on the resin-madebobbin 10. After theprepreg tape 12 has been wound on the outside of the self-meltingwire 11, the resin-madeholder 15 is arranged on the self-meltingwire 11 so as to cover the whole of thewire connecting portion 14 to which thelead wire 13 is connected, and theglass cloth tape 16 is wound on the outside of theprepreg tape 12 so as to wrap the resin-madeholder 15 to the inside, by which thewire connecting portion 14 and the resin-madeholder 15 are fixed to theprepreg tape 12. After the self-meltingwire 11, theprepreg tape 12, and theglass cloth tape 16 have been wound in the U-shaped portion of the resin-madebobbin 10, a pressure is applied to theglass cloth tape 16 forming the outermost layer from the outside to the inside, namely, to theprepreg tape 12 side, and the self-meltingwire 11 is energized while this pressure applying state is maintained. -
Figure 6 is an explanatory view for explaining the manufacturing method for the braking device for an elevator traction machine inembodiment 1 of the present invention, showing a state in which a pressure is applied to theglass cloth tape 16 from the outside before the self-meltingwire 11 is energized. InFigure 6 ,symbols 18a to 18d denote pressure plates that are arranged in the centers of long sides and in the centers of short sides of themagnet coil 8 having a substantially rectangular ring shape to apply a pressure to theglass cloth tape 16 toward the inside from four directions with a predetermined force. Thepressure plates magnet coil 8 and thepressure plates magnet coil 8 apply pressures to theglass cloth tape 16 so that a distance between pressure surfaces contacting with theglass cloth tape 16 takes a predetermined value. The pressure surfaces of thepressure plates 18a to 18d are arranged so as to come into contact with theglass cloth tape 16 only when the pressures are applied. - By energizing the self-melting
wire 11, the self-meltingwire 11 is heated, and the resin of the self-meltingwire 11 is melted. Also, the self-meltingwire 11 is heated and hence theprepreg tape 12 is heated, by which the resin impregnated into theprepreg tape 12 is also melted. Therefore, by energizing the self-meltingwire 11, theglass cloth tape 16 is stuck fast to theprepreg tape 12 by the resin impregnated into theprepreg tape 12. By the energization of the self-meltingwire 11, a gap formed between the self-meltingwires 11 are filled with the resin, and by the melting of the resin impregnated into theprepreg tape 12, a gap formed between the self-meltingwire 11 and theprepreg tape 12 and a gap formed between theprepreg tape 12 and theglass cloth tape 16 are filled with the resin. - After the self-melting
wire 11 has been energized for a predetermined period of time to melt the resin, thepressure plates 18a to 18d are separated from the surface of theglass cloth tape 16 and are removed, and themagnet coil 8 is arranged at a predetermined position in thestorage portion 7b of the fixediron core 7. Since thepressure plates 18a to 18d are arranged so that the pressure surfaces come into contact with theglass cloth tape 16 only, a trouble such that theprepreg tape 12 and thepressure plates 18a to 18d are stuck fast to each other by the resin impregnated into theprepreg tape 12 when the self-meltingwire 11 is energized so that thepressure plates 18a to 18d cannot be removed, or that the surface state of theprepreg tape 12 is deteriorated when thepressure plates 18a to 18d are removed so that the insulating properties cannot be secured can be prevented. - After the
magnet coil 8 has been arranged in thestorage portion 7b of the fixediron core 7, the cold-setting two-component acrylic adhesive 17 is filled into a gap formed between the resin-madebobbin 10 and the fixediron core 7, and thereby a predetermined surface of the resin-madebobbin 10 is bondingly fixed to the fixediron core 7. - The
braking device 3 manufactured by the above-described manufacturing method can be made thin and small easily, and has high reliability and productivity. Regarding the thinning and downsizing of thebraking device 3, since no mold resin is used unlike the conventional example to protect and fix the self-meltingwire 11 and thewire connecting portion 14, a predetermined thickness of mold resin is not needed, so that themagnet coil 8 can be made thin and small easily. - Since the resin-made
bobbin 10 has a substantially rectangular ring shape having a high slenderness ratio, when the self-meltingwire 11, etc. are wound on the resin-madebobbin 10, the center of long side and the center of short side tend to expand to the outside. Therefore, by applying a pressure from the outside using thepressure plates 18a to 18d when the self-meltingwire 11 is energized, the widths in the up and down direction and the right and left direction of themagnet coil 8 can be kept within a predetermined size, and thereby thebraking device 3 can be made thin and small. Also, since thewire connecting portion 14 and the resin-madeholder 15 are arranged on the outside of one corner portion having a curved surface shape of the self-meltingwire 11 and do not project in the up and down direction and the right and left direction of themagnet coil 8, a part of themagnet coil 8 does not protrude from the fixediron core 7, and also the area of one side surface 7a of the fixediron core 7, which exerts a great influence on the brake characteristics because it stores themagnet coil 8, need not be reduced or changed. - On the other hand, regarding the reliability of the
braking device 3, functions of protection, fixture, and heat release of the coil (the self-melting wire 11) and thewire connecting portion 14, which have conventionally provided by the mold resin, can be fulfilled sufficiently even by the above-described method. Specifically, the protection and insulation of the self-meltingwire 11 can be secured sufficiently by theprepreg tape 12 wound on the outside of the self-meltingwire 11. Since theprepreg tape 12 is wound so as to have a width slightly wider than the width of the U-shaped portion of the resin-madebobbin 10, even if the positions of the self-meltingwire 11 and theprepreg tape 12 somewhat shift at the time of melting, the self-meltingwire 11 is not exposed, so that the self-meltingwire 11 can be protected and insulated surely. - Also, the
wire connecting portion 14 is surely protected from a shock and vibration applied from the outside by the resin-madeholder 15. The outer peripheral surface of the resin-madeholder 15 is fixed by the adhesion force of theglass cloth tape 16, and theglass cloth tape 16 for fixing the resin-madeholder 15 is stuck fast to theprepreg tape 12 by melting the resin impregnated into theprepreg tape 12. Therefore, the resin-madeholder 15 is fixed surely to prevent the positional shift of thewire connecting portion 14, and thereby the deterioration in insulating properties caused by the positional shift of thewire connecting portion 14 can be prevented surely. Since a pressure is applied to theglass cloth tape 16 toward the inside, namely, toward theprepreg tape 12 side by thepressure plates 18a to 18d when the self-meltingwire 11 is energized, theglass cloth tape 16 can be fixed surely to theprepreg tape 12. - Also, by providing the
wire connecting portion 14 just outside one corner portion having a curved surface shape of the self-meltingwire 11 wound in a coil form, the length of the self-meltingwire 11 coming from the portion wound in a coil shape to the outside can be decreased as compared with the case where thewire connecting portion 14 is provided at a place separate from the portion wound in a coil form of the self-meltingwire 11, so that the protecting construction can be simplified and the reliability of insulation can be increased. To secure the predetermined insulating properties of thewire connecting portion 14, for example, thelead wire 13 is staked to the self-meltingwire 11, and thereafter the staking portion is insulated by an insulating tape, insulating tube, or the like. - Also, since the resin-made
bobbin 10 is manufactured by using an injection molding machine etc., at the time of cooling after molding, deformation such as warp or torsion occurs. Therefore, when the resin-madebobbin 10 is fixed to the fixediron core 7, the method is used in which the cold-setting two-component acrylic adhesive 17 is filled into the gap formed between the resin-madebobbin 10 and the fixediron core 7, by which the load is distributed to the whole of the attachment surface of the resin-madebobbin 10 to release stresses, and thereby damage to the resin-madebobbin 10 caused by stress concentration, creep, or the like can be prevented. - On the other hand, regarding the heat release properties of the electromagnet, since the gap between the self-melting
wires 11, the gap between the self-meltingwire 11 and the resin-madebobbin 10, the gap between the self-meltingwire 11 and theprepreg tape 12, and the gap between theprepreg tape 12 and theglass cloth tape 16 are filled with the resin, sufficient thermal conductivity is secured, and thereby the Joule's heat generated in the self-meltingwire 11 when the brake is applied can be released to the outside efficiently. Since the gap formed between the resin-madebobbin 10 and the fixediron core 7 is filled with the cold-setting two-component acrylic adhesive 17, the thermal conductivity between the resin-madebobbin 10 and the fixediron core 7 can also be secured sufficiently. Therefore, the Joule's heat generated in the self-meltingwire 11 when the brake is applied can also be transmitted to the fixediron core 7 efficiently, so that a local rise in temperature of the portion formed into a coil shape of the self-meltingwire 11 can also be prevented. - Also, regarding the productivity of the
braking device 3, the electromagnet can be manufactured by a step of winding the self-meltingwire 11, theprepreg tape 12, and theglass cloth tape 16, a step of melting the resin of the self-meltingwire 11 by the energization of the self-meltingwire 11 and melting the resin impregnated into theprepreg tape 12 to stick theglass cloth tape 16 fast to theprepreg tape 12, and a step of bonding themagnet coil 8 to the fixediron core 7. As compared with the conventional molding method, the manufacturing process can be simplified, and the manufacturing time can be shortened. In particular, only by energizing the self-meltingwire 11, the fixing of theglass cloth tape 16 can be performed with the melting of the resin of the self-meltingwire 11 and the resin impregnated into theprepreg tape 12, so that the work process can be simplified significantly. - Also, by using a cold setting adhesive to bond the resin-made
bobbin 10 to the fixediron core 7, a need for a thermostatic oven is eliminated, and the work efficiency can also be enhanced. A method in which the resin-madeholder 15 for protecting thewire connecting portion 14 is affixed onto the outer peripheral surface of theprepreg tape 12 by using an adhesive etc. is also conceivable. However, this method is disadvantageous because the resin-madeholder 15 must be held until the adhesive cures and thereby the manufacturing process and manufacturing time are increased. - As described above, according to the braking device for an elevator traction machine in accordance with the present invention, the braking device can be made thin and small easily, so that the elevator traction machine itself can be made thin and small. Therefore, the present invention achieves effects especially in a machine room-less elevator system in which the installation space of the traction machine is limited. Also, since the braking device has high reliability and productivity, various effects such as a reduction in cost and a shortened delivery period can be anticipated.
Claims (8)
- A braking device for an elevator traction machine comprising:a self-melting wired (11) wound a predetermined number of turns on a bobbin(10) and melted;a prepreg tape(12) wound on the outside of the self-melting wire(11);characterised in that it further comprisesa wire connecting portion(14) in which a lead wire(13) is connected to the self-melting wire(11); anda glass tape(16) stuck fast to the prepreg tape(12) by the resin impregnated into the prepreg tape(12) to fix the wire connecting portion(14) to the prepreg tape(12).
- A braking device for an elevator traction machine according to claim 1, characterised in that it further comprises:
a fixed iron core(7) provided in a rotor drum(2) turning in association with a driving sheave of elevator, to which the bobbin(10) is fixed. - The braking device for an elevator traction machine according to claim 1 or 2, characterized in that
the wire connecting portion(14) is provided on the outside of one corner portion having a curved surface shape of the self-melting wire(11), and
a holder(15) for protecting and insulating the wire connecting portion(14) by covering the wire connecting portion(14) from the outside of the prepreg tape(12) is provided on the outside of the one corner portion of the self-melting wired(11). - The braking device for an elevator traction machine according to claim 3, characterized in that the self-melting wire(11) wound on the bobbin(10) has a rectangular ring shape that is long in the up and down direction and short in the right and left direction.
- The braking device for an elevator traction machine according to claim 3 or 4, characterized in that the glass tape(16) is wound on the outside of the prepreg tape(12) and the holder(15) to fix the holder(15) to the prepreg tape(12), and is stuck fast to the prepreg tape(12) by the resin impregnated into the prepreg tape(12).
- A manufacturing method for a braking device for an elevator traction machine comprising the steps of:winding a self-melting wire(11) a predetermined number of turns on a bobbin(10);winding a prepreg tape(12) on the outside of the self-melting wire(11);winding a glass tape(16) on the outside of the prepreg tape(12) to fix a wire connecting portion(14) in which a lead wire(13) is connected to the self-melting wire(11) to the prepreg tape(12); andmelting the self-melting wire(11) by energizing the self-melting wire(11), and sticking the glass tape(16) fast to the prepreg tape(12) by the resin impregnated into the prepreg tape(12).
- The manufacturing method for a braking device for an elevator traction machine according to claim 6, characterized by further comprising a step of applying a pressure to the glass tape(16) wound on the outside of the prepreg tape(12) toward the inside before the self-melting wire(11) is energized.
- The manufacturing method for a braking device for an elevator traction machine according to claim 6 or 7, characterized by further comprising a step of bondingly fixing the bobbin(10) to a fixed iron core(7) after the self-melting wire(11) has been energized.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2006/303149 WO2007096955A1 (en) | 2006-02-22 | 2006-02-22 | Brake unit of elevator hoist machine and process for manufacturing the same |
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EP1988051A1 EP1988051A1 (en) | 2008-11-05 |
EP1988051A4 EP1988051A4 (en) | 2018-02-07 |
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EP (1) | EP1988051B1 (en) |
JP (1) | JP5050848B2 (en) |
KR (1) | KR100928115B1 (en) |
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JP2014190531A (en) * | 2013-03-28 | 2014-10-06 | Mitsubishi Electric Corp | Braking device and method of manufacturing the same |
DE112013006988B4 (en) * | 2013-04-24 | 2022-03-03 | Mitsubishi Electric Corp. | Braking device and elevator hoist using the same |
WO2018033986A1 (en) * | 2016-08-18 | 2018-02-22 | 三菱電機株式会社 | Electromagnet and method for producing electromagnet |
JP7034350B1 (en) * | 2021-03-08 | 2022-03-11 | 三菱電機株式会社 | Electromagnetic magnets, electromagnetic brakes, and elevator hoisting machines |
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JPS5941133A (en) * | 1982-08-30 | 1984-03-07 | Shinko Electric Co Ltd | Insulating method for coil of electromagnetic clutch brake |
JPS59218708A (en) * | 1983-05-27 | 1984-12-10 | Sumitomo Electric Ind Ltd | Coil for electromagnet |
JPS60176448A (en) * | 1984-02-23 | 1985-09-10 | Matsushita Electric Ind Co Ltd | Manufacture of voice coil type coil of linear motor |
JPS6328249A (en) * | 1986-07-16 | 1988-02-05 | Nitto Electric Ind Co Ltd | Manufacture of stator |
JPS63174306A (en) * | 1987-01-14 | 1988-07-18 | Toshiba Corp | Manufacture of molded coil |
DE19815962A1 (en) * | 1998-04-09 | 1999-10-14 | Atb Antriebstechnik Ag | Electrical machine, in particular for elevator drives |
JP4727789B2 (en) * | 2000-07-11 | 2011-07-20 | 株式会社日立製作所 | Rotating machine and manufacturing method thereof |
JP2003244881A (en) * | 2002-02-14 | 2003-08-29 | Hitachi Ltd | Rotary electric motor and manufacturing method for coil used therefor |
JP2004152822A (en) * | 2002-10-29 | 2004-05-27 | Mitsumi Electric Co Ltd | Solenoid coil and method of covering the same |
JP4455891B2 (en) * | 2004-01-09 | 2010-04-21 | 三菱電機株式会社 | Brake machine of hoisting machine |
-
2006
- 2006-02-22 JP JP2007519551A patent/JP5050848B2/en active Active
- 2006-02-22 WO PCT/JP2006/303149 patent/WO2007096955A1/en active Application Filing
- 2006-02-22 KR KR1020077012392A patent/KR100928115B1/en active IP Right Grant
- 2006-02-22 EP EP06714289.3A patent/EP1988051B1/en active Active
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CN101128385A (en) | 2008-02-20 |
WO2007096955A1 (en) | 2007-08-30 |
JP5050848B2 (en) | 2012-10-17 |
KR20070106688A (en) | 2007-11-05 |
EP1988051A1 (en) | 2008-11-05 |
JPWO2007096955A1 (en) | 2009-07-09 |
CN100590056C (en) | 2010-02-17 |
KR100928115B1 (en) | 2009-11-24 |
EP1988051A4 (en) | 2018-02-07 |
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