JPH04121048A - Moving element for linear motor - Google Patents

Abstract

PURPOSE:To hold a fixed interval between a moving element and a stator by providing a deforming part for limiting a space from the stator to a substrate of the element by an attraction force, and mounting a space limiting member for limiting the approaching movement to the stator. CONSTITUTION:A moving element 12 has a substrate 26 as a reaction plate. That is, a deforming part 44 separably movable at a stator by bendably deforming to a stator 14 is provided at one or a plurality of positions of an intermediate part in a moving direction along the stator 14 of the substrate 26. Wheels 36, 38 and 52, 54 are mounted as space limiting members for limiting the approaching movement of the substrate 26 to the stator 14 to hold the interval to the stator constant. Thus, the element 12 is always limited to be spaced from the stator 14 by an attraction force, with approaching the stator 14 limited by the wheels 36, 38, and 52, 54, and hence the interval between the element and the stator can be held constant.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mover for a linear motor that is provided corresponding to a stator and constitutes a linear motor together with the stator.

[Prior Art] A linear motor used in elevator equipment, high-speed moving railways, etc. is composed of a stator and a mover that is provided corresponding to the stator and moves along the stator by the action of thrust. ing.

Here, for stable thrust generation and control of the movable element, the distance between the stator and the movable element must be kept constant regardless of the moving position of the movable element.

By the way, between the stator and the mover, there is a large thrust acting in the moving direction of the mover (for example, 5 to 10 of the thrust).
(double) suction force is applied. In this case, if the movable element is deformed due to the action of a large suction force, the distance between the movable element and the stator changes (the interval becomes uneven), making it impossible to stably control the thrust of the movable element.

Therefore, even when a large suction force is applied, the distance between the stator and the stator can be maintained constant without deformation.
The mover needed to have high rigidity.

Therefore, as shown in FIG. 10, in the conventional mover 80,
A predetermined strength and rigidity were ensured by combining relatively thick members into a box shape and also providing reinforcing ribs 82 and the like.

This makes it possible to apply a large suction force to the movable element together with the thrust force, thereby achieving stable thrust force control.

[Problems to be Solved by the Invention] However, although such conventional movers can maintain high rigidity as described above, their weight increases, and due to this, it is necessary to increase the capacity of the linear motor. occured. For this reason, the linear motor itself becomes large and inevitably requires a large installation space, which has the drawback of increasing construction costs for high-speed moving railways and the like in which such a linear motor is used.

Moreover, with such conventional movers, although the mover itself has high rigidity and does not deform, it is important to note that when manufacturing and assembling the linear motor, or when installing it on-site, the installation position of the stator, etc. If an error occurs (for example,
(e.g., when the stator is installed curved, or when the stator is installed linearly but the locus of movement of the mover is curved, etc.), the relative relationship between the stator and mover may change. The spacing becomes uneven, making it impossible to stably control the thrust of the mover.

In consideration of the above facts, the present invention provides a linear motor mover that can maintain a constant distance from the stator regardless of the installation state of the stator, and can also reduce weight and cost. That is the purpose.

Means for Solving Problem 1] A mover of a linear motor according to the invention according to claim (1) is provided corresponding to a stator, constitutes a linear motor together with the stator, and moves in a direction approaching the stator. A mover of a linear motor on which an attractive force acts and a moving force in a direction along a stator, the mover being provided with a movable element at one or more places in an intermediate portion in a direction of movement along the stator, with respect to the stator. a reaction plate provided with a deformable portion that can move toward and away from the stator by bending and deforming; and a reaction plate that is attached to the reaction plate and moves toward the stator by abutting against the stator. and a spacing limiting member that limits the spacing from the stator to maintain a constant spacing.

The linear motor mover of the invention according to claim (2) is the linear motor mover according to claim (1), wherein the interval limiting member is pivotally supported by the reaction plate, and a part of the outer periphery is connected to the stator. It is characterized by being a wheel that comes into contact with the

The linear motor mover of the invention according to claim (3) is the linear motor mover according to claim (1) or claim (2), wherein the reaction plate is a plurality of reaction plates adjacent to each other. It is characterized in that it is pivotally connected so as to be relatively rotatable, and this pivotally supported portion serves as the deformable portion.

[Function] In the linear motor mover according to claim (1), a suction force acts on the reaction plate to bring it closer to the stator, and the distance limiting member comes into contact with the stator, thereby causing the reaction plate to approach the stator. Movement is restricted. That is, in other words (!), the mover is always limited in its distance from the stator by the attractive force, and its approach to the stator is limited by the spacing limiting member. ?fI is held constant (minimum interval).

Also, for example, if the stator is installed in a curved manner, if the mover reaches a position where the distance from the stator is uneven,
The deformable portion of the reaction plate is deformed by the suction force acting on the reaction plate, and moves closer or further away depending on the curvature of the stator. Therefore, in combination with the separation limiting effect due to the suction force and the approach limiting effect due to the spacing limiting member, the distance from the stator is maintained constant.

In the linear motor mover according to claim (2), approach to the stator is restricted by the wheels in contact with the stator, so that the distance between the mover and the stator is maintained constant (minimum distance). Ru. Furthermore, the movable element can be smoothly moved along the stator.

In the linear motor mover according to claim (3), the shaft supports of the reaction plates, which are pivotally connected to each other so as to be relatively rotatable, bend and deform in accordance with the curvature of the stator, and move toward or away from the stator. Therefore, the distance from the stator is reliably maintained constant.

[Embodiment] FIG. 1 shows a linear motor 10 according to a first embodiment of the present invention.
An elevator device 16 is an example to which the mover 12 of
It is shown. Further, FIG. 2 shows a sectional view of the mover 12 taken along line 1--2 in FIG. 1, and FIG. 3 shows a perspective view of essential parts of the mover 12.

Guide rollers 22 are attached to the cage 18 of the elevator device 16 with guide rails 20 for raising and lowering sandwiched therebetween, and the cage 18 is movable while being guided by the guide rails 20. In addition, the arrow Up in the figure shows the upward direction of the cage 18, and the arrow Er1Down shows the downward direction of the cage 18.

A linear motor 10 is arranged on one outer wall surface of the cage 18. The linear motor 10 includes a stator 14 and a mover 12 corresponding to the stator 14. The stator 14 is fixed within an elevator shaft of a building along the movement locus of the cage 18 that moves while being guided by the guide rails 20.

On the other hand, the mover 12 is connected to the outer wall surface of the cage 18 via a pair of upper and lower brackets 24 .

The mover 12 includes a substrate 26 as a reaction plate. This substrate 26 has a cage I in its longitudinal direction.
It is formed along the moving direction of 8. As shown in FIGS. 2 and 3, side plates 28 are formed at both ends of the substrate 26 in the width direction, and are bent at right angles to the substrate 26 toward the cage 18 and parallel to each other. Also, the board 2
A pair of intermediate plates 30 are formed at the center in the width direction of 6 so as to stand upright at right angles to the substrate 26 and parallel to the side plates 28, similar to the side plates 28. As a result, the mover 12 has a cross-sectional shape in which members having a U-shaped cross section are connected in parallel, and is symmetrical with respect to an axis passing through the center portion in the width direction.

As shown in detail in FIG. 3, each side plate 28 and intermediate plate 30
Elongated holes 32 are formed on the same axis at both ends in the longitudinal direction (up and down direction), and a support shaft 34 is inserted therethrough. The elongated hole 32 is formed so that its longitudinal direction corresponds to the thickness direction of the substrate 26, and the support shaft 34 is movable along the longitudinal direction of the elongated hole 32. Wheels 36.38 as spacing limiting members are attached to both ends and an intermediate portion of the support shaft 34, and these wheels 36.38 are attached to both ends and an intermediate portion of the stator 14 in the width direction. They abut rails 40 and 42, respectively.

Note that FIG. 3 shows only the support shaft 34 and wheels 36 and 38 provided at the upper end of the mover 12.

Furthermore, deformable portions 44 are provided at three locations at substantially intermediate portions of each of the side plates 28 and the intermediate plate 30 in the longitudinal direction.

Each deformed portion 44 is formed by cutting out the side plate 28 and the intermediate plate 30, and therefore, in these deformed portions 44, the side plate 28 and the intermediate plate 30 have low bending rigidity. In other words, these deformable parts 44 of the mover 12 can be bent and deformed, and the deformable parts 44
The movable element 12 is configured to be able to move toward and away from the stator 14 by bending and deforming the movable element 12 relative to the stator 14.

Each deformed portion 44 has a bearing portion 46 formed therein and a through hole 48 formed on the same axis, into which a support shaft 50 is inserted. Wheels 52, 54 as spacing limiting members are attached to both ends and an intermediate portion of the support shaft 50, and these wheels 52, 54, like the wheels 36, 38, respectively contact the rails 40, 42. are in contact with each other. Note that FIG. 3 shows only one support shaft 50 and wheels 52 and 54.

In the mover 12 configured as described above, a thrust force mainly acts on the substrate 26 due to the action with the stator 14, and an attraction force acts in the direction approaching the stator 14, and the stator moves while imparting a moving force to the cage 18. 14.

Next, the operation of this embodiment will be explained.

In the movable element 12 of the linear motor 10 configured as described above, suction force acts on the movable element 12 so as to approach the stator 14, and the wheel 36
．． 38 and wheels 52 and 54 are the stator 14 (rail 40
, 42) of the base plate 26.
Access to the area is restricted. In other words, the mover 12 is always limited in its separation from the stator 14 by the bow-sucking force, and the wheels 36.38 and 52.5
4 restricts the approach to the stator 14, thereby keeping the distance between the mover 12 and the stator 14 constant (minimum distance).

Furthermore, for example, if the stator 14 is installed in a curved manner (in other words, in a part where the distance from the guide rail 20 is uneven), the mover 1 may be placed in a position where the distance from the guide rail 20 is uneven.
2, the deformable portion 44 of the substrate 26 bends and deforms due to the suction force acting on the movable element 12, and approaches or separates according to the curvature of the stator 14. For this reason, the separation limiting effect due to the suction force and the wheels 36.38 and 52.54 (
Coupled with the approach restriction effect provided by the spacing limiting member), the spacing from the stator 14 is maintained constant. Therefore, a stable thrust can be generated in the moving element 12, and its control can be performed easily and stably.

In addition, since the mover 12 does not need to be made extremely rigid, it is not necessary to use thick members or provide reinforcing ribs, etc., and the weight can be reduced. Therefore, the capacity of the linear morph 10 itself It is also possible to make the size smaller, eliminating the need for a large installation space and reducing costs.

In the first embodiment, the deformable portion 44 that can be bent and deformed is simply provided on the substrate 26, and the deformed portion 44 is bent and deformed by the suction force acting on the mover 12, and the stator 14 is
However, in order to assist the bending deformation of the deformable portion 44 and reliably bring it closer to or away from the stator 14, a compression spring or the like is disposed between the deformable portion 44 and the cage 18. You can. In this case, when the movable element 12 reaches a position where the distance from the guide rail 20 is uneven, the deformable portion 44 is bent and deformed more reliably, and the distance from the stator 14 is maintained constant. Stable thrust control can be performed.

Next, a second embodiment of the present invention will be described. Note that parts that are basically the same as those in the first embodiment are given the same reference numerals as in the first embodiment, and their explanations are omitted.

FIG. 4 shows an elevator apparatus 66 as an example to which the mover 62 of the linear motor 60 according to the second embodiment is applied.

The cage 18 of the elevator device 66 is guided by the guide rail 20 for lifting and lowering, and is guided by the arrow Up or Down in FIG.
It is movable in the n direction.

As shown in detail in FIGS. 5 and 9, the mover 62 is
It is composed of a plurality of reaction plates 68. As shown in detail in FIG. 6, the reaction plates 68 are connected to each other by a connecting shaft 72 of a hinge portion 70 as a deformable portion to form a so-called caterpillar type plate, and as in the first embodiment, These hinge parts 70 can be bent around a connecting shaft 72.

Therefore, also in the mover 62, each hinge portion 70 bends and deforms with respect to the stator 64, so that the mover 62
2 has a structure that can move towards and away from the stator 64.

Guide rollers 74 are attached to both ends of each connecting shaft 72, and are fitted into a plurality of rails 76 fixed to the outer wall surface of the cage 18, respectively. As shown in FIG. 9, each rail 76 extends horizontally from the cage 18 toward the stator 64 at right angles to the traveling direction. Further, the guide roller 74 is housed within the guide surface 76A of the rail 76, and is movable only in the longitudinal direction of the rail 76 (in the six directions of arrows). As a result, each reaction plate 68, that is, the mover 62 is connected to the cage 18 via each guide roller 74, and the cage 18 moves up and down together with the mover 62.
2 (reaction play) 68) is the guide roller 74
within the range in which it can move along the rail 76 (in the six directions of arrows)
, and is movable relative to the cage 18.

A linear bearing 78 as a spacing limiting member is attached to the surface of each reaction plate 68 opposite to the cage 18. Each linear bearing 78 is in contact with the stator 64, and can slide smoothly on the surface of the stator 64.

In the second embodiment as well, the suction force acts on the mover 62 so that it approaches the stator 64, and the linear bearing 78 comes into contact with the stator 64, causing the mover 62 to move closer to the stator 64.
access is restricted. That is, the distance of the mover 62 from the stator 64 is always limited by the attraction force, and the approach to the stator 64 is limited by the linear bearing 78, so that the distance between the mover 62 and the stator 64 is limited. is kept constant (minimum interval).

Also in the second embodiment, if the mover 62 reaches a position where the distance from the stator 64 is uneven, each hinge portion 70 of the mover 62 will bend due to the suction force acting on the mover 62. so that each reaction plate 68 is connected to the stator 6
approach or move away depending on the curvature of 4. Therefore, in combination with the separation limiting effect due to the suction force and the approach limiting effect due to the linear bearing 78, the distance from the stator 64 is maintained constant.

Therefore, in this embodiment as well, a stable thrust can be generated in the moving element 62, and its control can be performed easily and stably.

Furthermore, it is possible to reduce the weight of the mover 62, and therefore it is also possible to reduce the capacity of the linear motor 60 itself, eliminating the need for a large installation space and reducing costs.

[Effects of the Invention] As explained above, in the linear motor mover according to the present invention, the distance from the stator can be maintained constant regardless of the installation state of the stator, and weight and cost can also be reduced. It has the effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an elevator apparatus to which a linear motor mover according to a first embodiment of the present invention is applied;
FIG. 2 is a cross-sectional view of the linear motor taken along the line ■-■ in FIG. FIG. 5 is a front view of an elevator apparatus to which a moving element of a linear motor according to the above is applied, and FIG.
Fig. 6 is an enlarged view of the fixed part, Fig. 4 is a vertical cross-sectional view taken along line VI-VI showing the hinge part of the reaction plate, and Fig. 7 is a partially broken view showing the installation state of the guide roller and rail. Fig. 4 is a view taken along the line ■-■, Fig. 8 is an enlarged view of the seventh fixed part, Fig. 9 is a perspective view of the main parts of the mover according to the second embodiment, and Fig.
FIG. 0 is a perspective view showing a conventional mover. DESCRIPTION OF SYMBOLS 10... Linear motor, 12... Mover, 14... Stator, 26... Board (reaction plate), 28...
Side plate, 30... Intermediate plate, 36.38... Wheel (distance limiting member), 44... Deformed part, 52.54... Wheel (distance limiting member), 60... Linear motor, 62 ... Mover, 64... Stator, 68... Reaction plate, 70... Hinge portion (deformed portion), 78... Linear bearing (space limiting member). 10... Linear motor 12 - Mover 14... - Stator 26... Board (reaction play date 28...
Side (reverse 30...Intermediate plate 36.38...Wheel (distance limiting member) 44...-Deformed portion 52.54...Wheel (distance limiting member) Figure 1゜Figure 60 ・ ・Linear motor 62 ・ Mover / Stator / Rear Kun Yong Prelinear to 7 rings (space limiting member) Fig. Hinge part (deformable part) Fig. Fig.

Claims (3)

[Claims] (1) A mover of the linear motor that is provided corresponding to the stator and constitutes a linear motor together with the stator, and receives an attractive force in the direction approaching the stator and a moving force in the direction along the stator. a reaction plate, the reaction plate having a deformable portion movable towards and away from the stator by being bent and deformed relative to the stator, at one or more locations in an intermediate portion in the direction of movement along the stator; , a spacing limiting member attached to the reaction plate and abutting against the stator to limit movement of the reaction plate toward the stator and maintain a constant distance from the stator; A linear motor mover featuring: (2) The linear motor mover according to claim 1, wherein the interval limiting member is a wheel that is pivotally supported by the reaction plate and has a portion of its outer periphery in contact with the stator. (3) A plurality of the reaction plates are pivotably connected to mutually adjacent reaction plates so as to be relatively rotatable, and the pivot support is the deformable portion (
1) or the linear motor mover according to claim (2).