JPH08324925A - Linear motor-driven elevator - Google Patents

Abstract

PURPOSE: To prevent generating an abnormal sound and vibration by decreasing local thermal deformation generated in a secondary conductor connecting part of a linear motor-driven elevator. CONSTITUTION: A protruded part 10c is provided in a connecting part of a secondary conductor 10, to connect this protruded part by a connecting member 21. Parallelly arranged walls 21a are provided in the connecting member 21, to fit a groove 21b to the protruded part 10c. In this way, a cross section of the secondary conductor 10, including the connecting member 21, is symmetrically formed, to equalize heat capacity and rigidity of the connected secondary conductors 10, 10, so as to prevent local thermal deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator driven by a linear motor.

[0002]

9 to 12 are views showing a conventional linear motor drive elevator disclosed in Japanese Patent Laid-Open No. 5-43167, FIG. 9 is an overall perspective view, FIG. 10 is a cross-sectional view of a hoistway, and FIG. 11 is a vertical cross-sectional view of the hoistway, and FIG. 12 is a front view of the secondary conductor connecting portion, and the same reference numerals indicate the same portions.

9 to 11, 1 is a hoistway wall, 2
Is a hoistway, 3 is a car-side guide rail fixed to the hoistway wall 1, 4 is a car, and 5 is a guide rail provided on the car 4.
A car-side guide shoe that engages with the car 4 to guide the car 4, a brake 6 provided on the car 4 for exerting a braking force between the car 4, and a return wheel 7 provided on the upper part of the hoistway 2, 8 is a counterweight, 9 is wrapped around the return wheel 7,
It is a main rope in which a car 4 and a counterweight 8 are respectively connected to the ends.

10 is a guide rail 1 on the side of the counterweight 8
The secondary conductor of the linear induction motor fixed to the hoistway wall 1 via 1 and also serving as the weight side guide rail, 12 is provided on the counterweight 8 and engages with the longitudinal edge of the secondary conductor 10 to counterbalance. Weight-side guide shoe for guiding the weight 8, 1
3 is a primary winding of a linear induction motor mounted on the counterweight 8 and facing the secondary conductor 10, and 14 is a moving cable suspended between the counterweight 8 and the hoistway wall 1.

In FIG. 12, 10a is a concave portion formed in the connecting portion of the secondary conductor 10, 10b is a convex portion, and 15 is a rivet for fastening the concave portion 10a and the convex portion 10b.

The conventional linear motor driven elevator is constructed as described above, and when the primary winding 13 mounted on the counterweight 8 is excited, a relative thrust is generated between the secondary conductors 10, The counterweight 8 is driven, and the counterweight 8 moves up and down while being guided by the guide shoe 12 along the edge of the secondary conductor 10. The movement of this counterweight 8 is the main rope 9
Is transmitted to the car 4 via the guide rail 4, and the car 4 is guided by the guide shoe 5 along the guide rail 3 and moves up and down. At the time of stop or emergency stop, the brake 6 holds the guide rail 3 to hold the car 4.

Here, since a plurality of secondary conductors 10 are connected to stand up and down along the hoistway 2, it is necessary to reduce the torque ripple generated when the primary winding 13 passes through this connecting portion. is there. Therefore, the concave portion 10a and the convex portion 10b are brought into contact with the connecting portion to form a lap joint, and the joint is fastened with the rivet 15.

[0008]

In the conventional linear motor drive elevator as described above, since the connecting portion of the secondary conductor 10 is lap joint, the deformed shape of the secondary conductor 10 due to the temperature change is the recess 10a. And the convex portion 10b is different,
Non-uniform deformation occurs locally. As a result, the primary winding 1
There is a problem that the gap between the third conductor 10 and the secondary conductor 10 is eliminated, and the two come into contact with each other, causing abnormal noise and vibration, and causing damage to the equipment. Further, at the seam portion, due to the difference in the left and right thermal deformation shapes, stress is applied to the rivet 15 and the rivet 15 is loosened so that a constant gap cannot be maintained between the primary winding 13 and the secondary conductor 10. There is a problem in that there is a possibility that the above problem may occur.

The present invention has been made in order to solve the above problems, and it is possible to reduce local thermal deformation and to eliminate abnormal noise and vibration caused by the connecting portion of the secondary conductor. An object is to provide a motor-driven elevator.

[0010]

A linear motor drive elevator according to a first aspect of the present invention includes a connecting member interposed between connecting portions of the secondary conductor, and a cross section of the secondary conductor including the connecting member. Is configured to have a symmetrical shape.

A linear motor drive elevator according to a second aspect of the present invention is the elevator of the first aspect, wherein the connecting member is made of a material having a high thermal conductivity.

A linear motor drive elevator according to a third aspect of the present invention is the elevator of the first and second aspects, wherein the connecting member is bonded to the secondary conductor with an adhesive.

[0013]

In the first aspect of the present invention, since the connecting member is interposed in the secondary conductor connecting portion so that the cross section of the secondary conductor including the connecting member is symmetrical, the secondary conductor of the connecting portion is formed. The mutual heat capacities and rigidity are equalized, and locally non-uniform deformation due to temperature change is reduced.

Further, in the second invention, since the connecting member is made of a material having a high thermal conductivity, the heat of one of the secondary conductors is immediately transmitted to the other through the connecting member.

Further, in the third invention, since the connecting member is adhered to the secondary conductor with the adhesive, the connecting work becomes easy.

[0016]

【Example】

Example 1. 1 to 3 are views showing an embodiment of the first invention of the present invention, FIG. 1 is an exploded perspective view of a secondary conductor connecting portion, and FIG.
Similarly, FIG. 3 is a front view, and FIG. 3 is a plan view of the connecting member. The same parts as those of the conventional device are indicated by the same reference numerals (the same applies to the following embodiments).

In the figure, 10c is a convex portion formed on the connecting portion of the secondary conductor 10, and the width of the convex portion 10c is formed thinner than the plate thickness of the secondary conductor 10. Reference numeral 21 denotes a connecting member that is interposed between the connecting portions of the secondary conductor 10, and is a secondary conductor 1
The wall 21a is made of the same material as that of 0, and has two parallel walls 21a and a groove 21b sandwiched between the walls 21a and 21a.
This groove 21b fits with the convex portion 10c of the connecting portion of the secondary conductor 10, and at this time, the outer dimensions of the walls 21a, 21a are the same as those of the secondary conductor 1.
It is formed to have a width of 0.

In the elevator driven by the linear motor constructed as described above, the secondary conductors 10, 10 are connected by the interposition of the connecting member 21, and the transverse cross section at the position shown by the chain line A in FIG. Has become. Therefore, the left and right heat capacities of the secondary conductor 10 become equal, and the rigidity becomes equal. Therefore, the change in shape of the secondary conductor 10 due to the temperature change becomes equal on the left and right sides. As a result, non-uniform deformation hardly occurs locally, and since the gap between the primary winding 13 and the secondary conductor 10 is kept constant, abnormal noise and vibration are reduced.

Since the nonuniform deformation of the secondary conductor 10 is not locally generated, the secondary conductor 10 and the connecting member 2 are not deformed.
1 and 1 can be bonded with an adhesive agent, and cost reduction is expected. Also, the installation workability is improved.

Example 2. 4 to 6 are views showing another embodiment of the first invention of the present invention, FIG. 4 is an exploded perspective view of a secondary conductor connecting portion, FIG. 5 is a front view of the same, and FIG. 6 is a plan view of a connecting member. Is. In this embodiment, the portions of the wall 21a and the groove 21b shown in FIGS. 1 to 3 are formed into a tubular portion 21c, and the outer dimension of the width of the tubular portion 21c is equal to the width dimension of the secondary conductor 10. Has been formed.

That is, the convex portion 1 of the connecting portion of the secondary conductor 10
0c is inserted into the cylindrical portion 21c and is connected via the connecting member 21. Now, the two secondary conductors 1 to be connected
Since the heat capacities of 0 are the same and the rigidity is also the same, the same operation and effect as those of the first embodiment can be obtained.

Example 3. 7 and 8 show a second embodiment of the present invention.
7 is an exploded perspective view of the secondary conductor connecting portion, and FIG. 8 is a front view of the same. In this embodiment, a concave portion 10a is provided in one connecting portion of the secondary conductor 10 and a convex portion 10b is provided in the other connecting portion, and a space formed between the concave and convex portions 10a and 10b is formed like copper, for example. A connecting member 22 made of a material having high thermal conductivity is sandwiched and connected.

As a result, the heat of one of the secondary conductors 10 is immediately transferred to the other of the secondary conductors 10 via the connecting member 22, so that the heat capacity of the two connected secondary conductors 10, 10 is increased. The same case is obtained, and the same operation and effect as those of the first embodiment can be obtained.

The uneven portions 10a, 10 of the secondary conductor 10
It is also possible to bond b and the connecting member 22 with an adhesive agent, and it is possible to reduce the cost and improve the installation workability.

[0025]

As described above, in the first invention of the present invention, the connecting member is interposed in the secondary conductor connecting portion so that the cross section of the secondary conductor including the connecting member is symmetrical. The heat capacities and rigidity of the secondary conductors of the connecting part are equal, local non-uniform changes due to temperature changes are reduced, the gap between the primary winding and the secondary conductor is kept constant, and noise and vibration There is an effect that can realize an elevator that is not comfortable to ride.

Further, in the second invention, since the connecting member is made of a material having a high thermal conductivity, the heat of one of the secondary conductors is immediately transmitted to the other via the connecting member, and the two connected members are connected. This is similar to the case where the heat capacities of the secondary conductors are equal, and has the same effect as the first invention.

Further, in the third aspect of the invention, since the connecting member is adhered to the secondary conductor with an adhesive, the connecting work is facilitated.
In addition to the effects of the invention, there is an effect that cost can be reduced and installation workability can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a secondary conductor connecting portion showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

3 is a plan view of the connecting member of FIG. 1. FIG.

FIG. 4 is an exploded perspective view of a secondary conductor connecting portion showing a second embodiment of the present invention.

FIG. 5 is a front view of FIG. 4;

6 is a plan view of the connecting member of FIG.

FIG. 7 is an exploded perspective view of a secondary conductor connecting portion showing a third embodiment of the present invention.

FIG. 8 is a front view of FIG. 7.

FIG. 9 is an overall perspective view showing a conventional linear motor drive elevator.

FIG. 10 is a transverse cross-sectional view of a hoistway showing a conventional linear motor driven elevator.

FIG. 11 is a vertical cross-sectional view of a hoistway showing a conventional linear motor driven elevator.

FIG. 12 is a front view of the secondary conductor connecting portion of FIG. 9.

[Explanation of symbols] 2 hoistways, 8 counterweights, 10 secondary conductors, 10
a concave portion, 10b, 10c convex portion, 13 primary winding, 2
1 connecting member, 21a wall, 21b groove, 21c tubular portion, 22 connecting member,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Sugita 1 Hishimachi, Inazawa City Mitsubishi Electric Co., Ltd. Inazawa Factory

Claims (3)

[Claims] 1. An elevator comprising a primary winding of a linear motor mounted on a counterweight and a secondary conductor formed of a plurality of longitudinal members connected in the hoistway and engaged with the primary winding, A linear motor drive elevator, comprising a connecting member interposed between the connecting portions of the secondary conductor, and the secondary conductor including the connecting member is configured so that a cross section thereof has a symmetrical shape. 2. The linear motor driven elevator according to claim 1, wherein the connecting member is made of a material having high thermal conductivity. 3. The linear motor drive elevator according to claim 1, wherein the connecting member is bonded to the secondary conductor with an adhesive.