JPH0881158A - Cylindrical liner motor for elevator - Google Patents

Abstract

PURPOSE: To provide a linear motor for an elevator, capable of being easily assembled, and preventing its temperature rise. CONSTITUTION: In each iron core 1, a through hole through which studs penetrate are formed after iron core trimmed plates manufactured by the same trimming die are stacked. The iron core trimmed plates and end plates 1c select the depths of slots 1b so that the projecting size after the assembly may be larger than the outside diameter of a coil 2 by a size F. In assembling of each iron core 1, the coil 2 is inserted after three iron cores 1 are fixed to a cover 4, finally, one iron core 1 is incorporated so as to complete assembly work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to an elevator cylindrical linear motor incorporated in an elevator which employs a linear motor as a drive source.

[0002]

2. Description of the Related Art FIG. 9 showing an example of a conventional rope traction type elevator and FIG. 10 showing a plan view of FIG.
In, the machine room 28 is installed above the hoistway 29 installed in a corner of the building where the elevator is installed.
A machine beam 31 made of a shaped steel material is installed on the upper surface of the floor 20 of the machine room 28, and a hoist 32 is installed on the upper surface of the machine beam 31 via a machine bed.

An electric motor 37 for driving is attached to the hoisting machine 32 via a mounting leg projecting like a cantilever on the rear side surface, and an output shaft of the electric motor 37 is coupled with a coupling 37a. An input shaft of a speed reducer (not shown) is connected. In FIGS. 9 and 10 of this speed reducer, a non-excitation actuated disc brake 38 is attached.

The hoisting machine 32 is provided with a main sheave 33 at the end of the output shaft which projects forward from the left side of the hoisting machine 32, and a plurality of main ropes 34 are wound on the main sheave 33. It is equipped. At the lower end of this main rope 34 on one side, a car 35 is shown in FIG.
It is suspended as shown in, and at the lower end of the other end of the main rope 34,
A counterweight 36 is suspended.

In the thus constructed elevator, the electric motor 37 is speed-controlled and accelerated / decelerated by an inverter (not shown) installed in the machine room 28, and the car 35 is landed on a predetermined floor.

On the other hand, in an elevator, a method of directly raising and lowering a car with a linear motor has been tried instead of the conventional driving method using the above-described hoisting machine composed of a hoisting electric motor and a speed reducer. . This is for the following reason.

In an elevator using a three-phase induction motor and a speed reducer which have been conventionally used, FIG. 9 and FIG.
As shown in the single-lap rope traction elevator of FIG. 10 showing the plan view of FIG. 10, it is necessary to install the hoisting machine 32 for raising and lowering the car 35 and the counterweight 36 and the baffle sheave 33 above the car 35. Therefore, in addition to the car 35 and the counterweight 36, the machine room 28 must be provided above the hoistway 29.

Then, since the machine room 28 occupies a large space, the machine room 28 is located on the roof of the building, especially in urban areas.
In order to install the building, the building must be lowered due to the regulation of the diagonal line on the north side. In addition, if the elevator is to be installed in a sunny place on the south side in order to avoid the regulation of the diagonal line on the north side, it will be greatly restricted in the construction of the building.

Therefore, an elevator using a cylindrical linear motor (hereinafter, simply referred to as a linear motor) as shown in FIG. 11 has been developed and partially put into practical use. In an elevator using this linear motor, a linear motor 23 is housed in the center of a counterweight 22, and a reaction rod 24, which serves as a secondary conductor, is coaxially passed through the shaft center of the linear motor 23.

Then, the counterweight 22 can be moved up and down along the reaction rod 24 by the thrust force by the electromagnetic force generated between the linear motor 23 and the reaction rod, and the counterweight 22 is attached to the counterweight 22. The machine shown in FIG. 10, which is required in an elevator using a conventional drive motor, by raising and lowering the car 27 in a slipping manner through the rope 25 and the warping sheaves 26A and 26B around which the rope 25 is wound. Room 28 is unnecessary.

In FIG. 11, the linear motor 23 is vertically fixed to the center of a counterweight frame 40 made of channel steel in a frame shape. The counterweight frame 40 is suspended by the rope 25 from the deflecting sheaves 26A and 26B, and the rope 25 is provided on the ceiling of the hoistway to deflect the sheaves 26A and 26B.
Is connected to the car 27 via the car 1 and the counterweight frame 22
Can be moved up and down in a sliding manner.

Further, a counterweight 39 made of an iron plate and having a total weight of 100 kg is loaded on both sides of the linear motor 23 on the counterweight frame 40, and the details of the lower sides of the linear motor 23 are omitted. An electromagnetic brake is provided.

FIG. 12 is an enlarged vertical cross-sectional view of the linear motor 23 shown in FIG. 11. The linear motor 23 shown in FIG. FIG. 13 is a vertical sectional view of FIG.

In FIGS. 12 and 13, the linear motor 23
Is an iron core 11 shown in an enlarged perspective view of FIG. 14, which will be described later, a cylindrical coil 12 inserted into a plurality of slots 11b formed on the inner periphery of the iron core 11, and four iron cores 12 at equal intervals on the inner surface. A cylindrical frame 13 to be fixed to the frame 13 and annular covers 14 fixed to both ends of the frame 13,
The thrust is generated by the electromagnetic force acting between the cylindrical secondary conductor 8 and the cylindrical secondary conductor 8 penetrating the axis of the cylindrical coil 12.

Of these, the iron core 11 has a substantially prismatic shape as shown in FIG. 14, and in FIG. 12, the iron core punched plate 11a having a slot 11b formed in a comb shape on one side which is the inner peripheral side is provided with a slot 11b. The core side is formed into a prismatic shape by laminating the side so as to form an inner peripheral surface coaxial with the cylindrical side secondary conductor 8, and the iron core 11 surrounds the cylindrical secondary conductor 8 as shown in FIG. 4 pieces are radially arranged at 90 ° intervals.

An annular coil 12 having an insulating layer formed on the outer periphery is inserted into each slot 11b of the iron core 11 as shown in FIGS. 12 and 13, and together with the iron core 11, a cylindrical frame is formed.
After being axially inserted into 13, frame 15 with fixing bolts 15.
It is fixed from the outside of 13. The left and right annular covers 14 are also fixed to both ends of the frame 13 by bolts 14 a, and form a linear motor 23. On the inner circumference of the frame 13, a band-plate-shaped seat is welded to a location where the arc-shaped surface on the outer circumference of the iron core 11 is fixed, and the inner circumference of the seat is arc-shaped and cut by an NC processing machine. .

In the linear motor configured as described above,
Gap G is formed evenly between the iron cores 11 coaxially assembled and the cylindrical secondary conductor 8 as shown in FIGS. 12 and 13, and the cylindrical secondary conductor 8 is generated by the moving magnetic field generated in the linear motor 23. 11, a linear motor 23 moves up and down the hoistway along the cylindrical secondary conductor 8 in FIG.

Further, in the linear motor constructed as described above, as long as the gap G is equal between the four iron cores 11 and the cylindrical secondary conductors 8, there is a gap between each iron core 11 and the cylindrical secondary conductor 8. The attraction forces acting are equal and cancel each other out, and the force exerted on a guide roller (not shown) that maintains the gap G between the iron core 11 and the cylindrical secondary conductor 8 is reduced, resulting in a lightweight and compact design. It constitutes a linear motor.

By the way, the slot of the iron core 11 shown in FIG.
An enlarged detailed view of the YY cross section of the portion 11b is shown in FIG. That is, in FIG. 16, in order to arrange the gap G between the inner peripheral surface of the iron core 11 and the outer periphery of the cylindrical secondary conductor 8 to be equal, the radius R + G of the cylindrical secondary conductor 8 should be set. The iron plates 11a are slightly shifted one by one, and are laminated so that the inner and outer peripheries have an arc shape with a radius Rs shown in FIG.

[0020]

However, in the linear motor constructed as described above, the depth A of the slot 11b formed in the iron core 11 is determined by the curvature Rs of the outer circumference of the coil 12.
The studs that change the position one by one depending on the stacking position, and also fix the cores 11 after stacking them.
In order to align the positions of the 16 through holes 16a, the dimension B from the bottom of the slot must be changed one by one.

Therefore, in order to manufacture one iron core, it is not possible to construct the iron core 11 with one type of iron core punching plate, and it is necessary to prepare many types like the iron cores 11a1 to 11a6 shown in FIG. In addition, the work for laminating the plates takes time, and the assembly takes a long time.

Further, the iron core 11 constructed as described above is shown in FIG.
As shown in, if the angle C of the opening when the iron core 11 is combined is at least 180 ° or more, the coil 12 and the slot 11b interfere with each other by the difference D, and the coil 12 cannot be inserted into the coil 12. Since it is necessary to assemble the iron cores in two groups adjacent to each other, each slot of several tens of iron cores is removed.
It takes a lot of time to adjust the pitch of 11b.

On the other hand, as shown in FIG. 11, the linear motor 23
Since the cage 27 is opposed to the hoistway, it is required to reduce the thickness in the car direction in order to reduce the area occupied by the hoistway.

Therefore, an object of the invention described in claims 1 and 2 is to obtain a cylindrical linear motor for an elevator which is easy to assemble and whose thickness can be reduced, and
An object of the invention described in claim 3 is to obtain an elevator cylindrical linear motor which is easy to assemble and can improve efficiency.

[0025]

According to a first aspect of the present invention, there is provided a cylindrical linear motor for an elevator according to claim 1, wherein a plurality of iron cores are formed by stacking a plurality of iron cores, each of which has an arc-shaped bottom portion of a core punched plate having comb-shaped slots formed on one side thereof. In a cylindrical linear motor for elevators that are arranged radially opposite to each other and form a primary side core group, a plurality of through holes into which fasteners are inserted are formed in the laminated iron core. Characterize.

Further, in the cylindrical linear motor for elevator according to a second aspect of the present invention, a plurality of iron cores are arranged symmetrically in a radial direction with one side facing each other and having arcuate bottom slots formed in a comb shape. In an elevator cylindrical linear motor having an annular coil inserted in a slot of an iron core and a secondary conductor coaxially loosely fitted in the center of the coil, the projected diameter between the ends of the slots of the iron core facing each other. Is larger than the outer diameter of the coil.

Further, in the cylindrical linear motor for elevators according to a third aspect of the present invention, a plurality of iron cores are arranged symmetrically in a radial direction with one side facing each other having arc-shaped slots formed in a comb shape at their bottoms and facing each other. In a cylindrical linear motor for elevator having an annular coil inserted in a slot and a secondary conductor coaxially fitted in the center of the coil, a plurality of spacers are provided in the center of the iron core in a direction orthogonal to the axial direction. It is characterized in that the projected diameter between the ends of the slots of the opposing iron cores is larger than the outer diameter of the coil.

[0028]

In the invention described in claim 1, all the core punched plates to be laminated are common. Further, in the invention according to the second aspect, the coils can be inserted after the facing iron cores are fixed. Further, in the invention according to claim 3, a cooling air passage is formed in the central portion of the iron core by the spacer inserted in the central portion of the iron core, and the cooling air flowing through the passage forms a cooling air passage in each iron core. The temperature rise is reduced.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a cylindrical linear motor for elevator according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of an elevator cylindrical linear motor of the present invention, which corresponds to FIG. 13 shown in the prior art,
FIG. 2 is an enlarged detailed view of the “A” portion of FIG. 1, and FIG. 3 is a partially enlarged detailed view of FIGS. 1 and 2, which is shown in the prior art.
It is a figure corresponding to 16.

In FIGS. 1, 2 and 3, the slot 1b formed on the inner peripheral side of the iron core 1 has the depth A at both end portions shown in FIG. 2 and the outer diameter of the coil 2 shown in FIG. It is deeper than the slot 11b of the iron core 11 shown in the prior art so as to form a gap F which is smaller than the projected dimension E. The same applies to the end plates 1c at both ends of the iron core 1.

That is, each iron core blank 1a shown in FIG.
Similar to FIG. 16 shown in the prior art, a predetermined number of layers are stacked so that the gap formed between the outer circumference of the cylindrical secondary conductor 3 becomes G shown in FIG. Each of the laminated core punched plates 1a has an end plate 1c made of a mild steel plate punched in the same shape as the core punched plate 1a on both end faces, as shown in FIGS.
As shown in FIG. 3, they are stacked from the outside and temporarily fixed to the inner core punched plate 1a by spot welding.

The iron core 1 to which the end plates 1c are temporarily attached to both end faces is in a state where its shape is maintained by a jig (not shown),
Through holes 6a for inserting the studs 6 are machined in a drilling machine, and tightened by the studs 6 inserted into the respective through holes 6a and nuts 7 screwed from both ends of the studs 6.

Next, the procedure for assembling the linear motor using the iron core 1 thus assembled will be described with reference to FIGS. 4, 5 and 6.
Described in. First, the three iron cores 1 are fixed to the inner surface side of the cover 4 on one side at 90 ° intervals by the bolts 4a shown in FIG. 6 to form the openings of the angle C1 shown in FIG.

Next, the coil 2 is inserted from the direction of the opening as shown by the arrow in FIG. 4, and the remaining one iron core 1 is inserted as shown by the arrow in FIG. It is fixed by bolts 4a as shown in FIG. Finally, the cover 4 on the other side is fixed to each iron core 1 with bolts 4a as shown in FIG. The coil 2 is fixed to each iron core 1 with an epoxy resin.

Therefore, in the linear motor of the present invention, each iron core 1 only needs to fix both ends in the axial direction to the cover 4, and the frame 13 shown in FIGS. 12 and 13 shown in the prior art is unnecessary. . Therefore, not only the assembly is facilitated, but also the size can be reduced.

Further, since the iron core blank 1a is of one type, not only is it easy to manufacture including the die, but also the coaxiality between the iron core 1 and the coil 2 is easily adjusted. The electromagnetic force acting between the iron core 1 and the cylindrical secondary conductor 8 can be balanced, the pressing force between the guide roller and the cylindrical secondary conductor 8 is reduced, and the running frictional resistance is reduced. Therefore, the propulsive force of the linear motor can be increased.

Next, FIG. 7 is a partial vertical cross-sectional view showing another embodiment of the cylindrical linear motor for an elevator of the present invention, which corresponds to FIG. 2, and FIG. 8A is a plan view of FIG. Then, Fig. 6
8B is a diagram corresponding to a partially enlarged view of FIG.
FIG. 9 is a partially enlarged perspective view of FIGS. 7 and 8.

In FIGS. 7 and 8, a plurality of rod-shaped spacers 5 each having an H-shaped cross section are formed at the center of the iron core 1 in the stacking direction.
8 is inserted in the middle position of each coil 2 in FIG. 8, and then is tightened together with the core punched plate and the end plate by the stud 6 shown in FIG. The gap formed by the spacer 5 serves as a passage for cooling air generated by moving up and down the elevator hoistway, as shown by the arrow in FIG. 7.

In the elevator cylindrical linear motor having the iron cores as described above, the iron cores 1 and the coils 2 are cooled by the cooling air flowing through the cooling air passages formed between the spacers 5. . Therefore, since it is possible to prevent the temperature rise of each of the iron cores 1 and the coils 2, it is possible to reduce the size of the cylindrical linear motor by reducing the loss.

[0040]

As described above, according to the invention of claim 1,
A cylinder for an elevator that forms a primary core group by radially symmetricly arranging a plurality of iron cores in which the bottoms of slots of an iron core punched plate having comb-shaped slots formed on one side are laminated in an arc shape with the slot sides facing each other. In linear motors, by forming multiple through-holes into which fasteners are inserted in the laminated iron cores, all laminated core cores are made common, making it easy to manufacture cylindrical cylinders for elevators. A linear motor can be obtained.

According to the second aspect of the present invention, a plurality of iron cores are formed symmetrically in a radial direction with one side facing each other and having arcuate bottom slots formed in a comb shape. In a cylindrical linear motor for an elevator having an inserted annular coil and a secondary conductor coaxially loosely fitted in the center of the coil, the projected diameter between the ends of the slots of the opposing iron cores is set to the outside of the coil. By making the diameter larger than the diameter, the coils can be inserted after the opposing iron cores are fixed, so that an elevator linear motor that is easy to manufacture can be obtained.

Further, according to the invention described in claim 3,
A plurality of iron cores, which are formed symmetrically in a radial direction with one side facing each other and have arc-shaped slots with a bottom-shaped slot, an annular coil inserted into the slots of the iron core, and coaxially with the center of the coil. In a cylindrical linear motor for elevators with a secondary conductor that is loosely fitted, insert a plurality of spacers in the center of the iron core in the direction orthogonal to the axial direction, and project the projected diameter between the ends of the opposing core slots. By making the coil larger than the outer diameter of the coil, a spacer inserted in the center of the iron core forms a passage for cooling air in the center of the iron core, and the cooling air flowing through this passage forms the temperature of each iron core. Since the rise is reduced, it is possible to obtain a cylindrical linear motor for elevator that is easy to manufacture and can improve efficiency.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of an elevator cylindrical linear motor of the present invention.

FIG. 2 is an enlarged detailed view of part A of FIG.

FIG. 3 is a partially enlarged cross-sectional view showing an embodiment of a cylindrical linear motor for elevator according to the present invention.

FIG. 4 is a partial cross-sectional view showing the operation of the elevator cylindrical linear motor of the present invention.

FIG. 5 is a partial cross-sectional view showing an operation of the cylindrical linear motor for elevator according to the present invention, which is different from FIG.

FIG. 6 is a front view showing a cylindrical linear motor for an elevator according to the present invention.

FIG. 7 is a partial cross-sectional view showing a cylindrical linear motor for elevator according to the present invention.

FIG. 8 is a partial plan view of FIG. 7;

FIG. 9 is a diagram showing an example of a conventional single-wrap rope traction elevator.

FIG. 10 is a plan view of FIG.

FIG. 11 is a perspective view showing an example of an elevator that employs a conventional cylindrical linear motor for an elevator.

FIG. 12 is a vertical cross-sectional view showing an example of a conventional cylindrical linear motor for an elevator.

13 is a partial cross-sectional view of FIG.

FIG. 14 is a schematic view of an iron core incorporated in a conventional cylindrical linear motor for an elevator.

FIG. 15 is an explanatory diagram showing an operation of a conventional elevator cylindrical linear motor.

FIG. 16 is a view of a conventional cylindrical linear motor for elevators.
Explanatory drawing which shows the effect different from 15.

[Explanation of symbols]

1 ... Iron core, 1a ... Iron core blank, 1b ... Slot, 1c ... End plate, 2 ... Coil, 3 ... Secondary cylindrical conductor, 4 ... Cover, 5
… Spacers, 6… Studs, 7… Nuts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshikatsu Hasegawa No.1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu factory inside

Claims (3)

[Claims] 1. A primary-side core group in which a plurality of iron cores, which are formed by stacking arc-shaped bottoms of core slots of an iron core punched plate having a comb-shaped slot formed on one side, are arranged radially symmetrically with the slot sides facing each other. A cylindrical linear motor for elevators, wherein a plurality of through holes into which fasteners are inserted are formed in the laminated iron cores. 2. A plurality of iron cores having arcuate bottom slots formed in a comb shape and arranged radially symmetrically with one side facing each other, an annular coil inserted into the slots of the iron core, and the coil. In a cylindrical linear motor for elevator having a secondary conductor coaxially loosely fitted in the center of the, the projected diameter between the ends of the slots of the opposing iron cores is made larger than the outer diameter of the coil. Cylindrical linear motor for elevators. 3. A plurality of iron cores having arcuate bottom slots formed in a comb shape and arranged radially symmetrically with one side facing each other, an annular coil inserted into the slots of the iron core, and the coil. In a cylindrical linear motor for elevator equipped with a secondary conductor coaxially loosely fitted in the central part of the core core, a plurality of spacers are inserted in the central part of the iron core in a direction orthogonal to the axial direction, and A cylindrical linear motor for an elevator, wherein the projected diameter between the ends of the slots is larger than the outer diameter of the coil.