JP2507699B2 - Breaker for elevator hoist - Google Patents

Description

TECHNICAL FIELD The present invention relates to a brake device for an elevator hoist, which is provided in an elevator hoist and stops rotation of a sheave.

[Prior Art] FIG. 8 shows, for example, Japanese Utility Model Publication No. 54-159556 and Japanese Patent Laid-Open No. 57-57556.
Fig. 9 is a front view showing the main part of a conventional elevator similar to that shown in the -33183 publication, and Fig. 9 is a plan view of Fig. 8.

In the figure, a sheave (3) and a deflector (4) are provided in the machine room (2) above the hoistway (1).
A rope (5) is wound around the sheave (3) and the deflector (4). A car (6) is attached to one end of the rope (5), and a counterweight (7) is attached to the other end. The car (6) and the counterweight (7) move up and down in the hoistway (1) by the rotation of the sheave (3). The sheave (3) is connected to a motor (9) via a gear (not shown) housed in a gear case (8).

A cylindrical brake drum (11) is fixed to the input shaft (10) of the gear. A pair of arms (13) having shoes (12) on both sides of the brake drum (11).
Are provided so that they can freely come into contact with and separate from the outer peripheral surface of the brake drum (11). The arm (13) is constantly urged toward the brake drum (11) by the spring (14). The electromagnetic magnet (15) is located above the brake drum (11).
Is provided, and by exciting the electromagnetic magnet (15), the arm (13) is separated from the brake drum (11) against the spring (14).

With the brake drum (11), shoe (12), arm (13), spring (14) and electromagnetic magnet (15),
A braking device (16) is configured. A hoisting machine (17) is constituted by the sheave (3), the deflector (4), the gear, the motor (9) and the brake device (16).

In the conventional elevator constructed as described above, the driving force of the motor (9) is transmitted to the sheave (3) through the gear, and the car (6) moves up and down in the hoistway (1). . At this time, the electromagnetic magnet (15) is excited, and the arm (13) is separated from the brake drum (11), that is, the brake is released.

Further, by stopping the energization of the electromagnetic magnet (15) and pressing the arm (13) against the outer peripheral surface of the brake drum (11) by the spring (14), the shoe (12) and the brake drum (11) are separated. The frictional force between them stops the rotation of the input shaft (10) and stops the lifting and lowering of the car (6).

[Problems to be Solved by the Invention] In the conventional brake device (16) configured as described above, since the outer peripheral surface of the brake drum (11) is used as the braking surface, the brake drum (11) is axially moved in the axial direction. There is a problem that the size is inevitably increased, which increases the size of the entire hoisting machine (17) in the axial direction of the motor (9). Moreover, since the arm (13) and the spring (14) are arranged in the radial direction of the brake drum (11),
There is also a problem that the overall size of the hoisting machine (17) in the direction perpendicular to the axial direction of the motor (9) becomes large.
Furthermore, since a maintenance space of a predetermined size (for example, 50 cm or more) is required around the hoisting machine (17) between the wall surface or the pillar of the machine room (2), as described above. There was also a problem that as the size of (17) became larger, the machine room (2) also needed to be expanded.

The present invention has been made to solve the above problems, and an elevator capable of downsizing a hoist and disposing the hoist in a smaller machine room. The purpose is to obtain a braking device for a hoisting machine.

[Means for Solving the Problems] A brake device for an elevator hoisting machine according to the present invention has a brake disc fixed to a rotating shaft, and shoes arranged so as to be able to come into contact with and separate from a part of both surfaces of the brake disc. , A spring for urging the shoe toward the brake disc is arranged parallel to the rotation axis, and a sub-assembly having an arm, a shoe and a spring is provided on the reference surface of the gear case on the side opposite to the sheave with respect to the input shaft. It is attached together.

[Operation] In the present invention, the rotation of the brake disc is braked by the frictional force between the brake disc and the shoe, and the brake is released by pulling the shoe away from the brake disc.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
1 is a plan view showing a main part of an elevator hoisting machine according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a sectional view of FIG. 1, and FIG. 8 and FIG. 9 that are the same as or equivalent to those in FIG. 9 are assigned the same reference numerals and explanations thereof are omitted.

In the figure, the motor (9) is fixed to a support portion (8a) provided integrally with the gear case (8). A brake disc (21) is fixed to an input shaft (10) which is a rotating shaft for transmitting the rotation of the motor (9) to the sheave (3). An example of this brake disc (21) is the fourth
It is shown in FIGS.

A sub-assembly (22) as shown in FIGS. 6 and 7 is arranged at an end of the gear case (8) opposite to the sheave. The metal sub-assembly (22) includes a housing (23), a pair of arms (24), a pair of shoes (25), a pair of screw rods (26), a pair of springs (27) and a pair of levers (28). Has become.

The housing (23) among the parts constituting these sub-assemblies (22) includes a positioning part (23a) (seventh part).
(Fig.), And is positioned by aligning the positioning part (23a) with the reference surface provided on the upper part of the support part (8a) and the end of the gear case (8) on the side opposite the sheave, and the support part It is fixed to (8a).

A pair of arms (24) are attached to the housing (23) by pins (2
It is attached so that it can rotate around 9). A shoe (25) is fixed to one end of each arm (24), and is brought into contact with and separated from both sides of the brake disc (21) by the rotation of the arm (24). A screw rod (26) reciprocally movable in the axial direction, that is, the axial direction of the motor (9) is fixed to the other end of each arm (24). Each threaded rod (26) is constantly biased by a spring (27), which causes each shoe (25) to engage the brake disc (2).
It is always urged to the side that contacts 1).

Each lever (28) is rotatably attached to the upper part of the housing (23), and when the lever (28) is rotated, the arm (24) is rotated against the spring (27). , The shoe (25) is separated from the brake disc (21).

An electromagnetic magnet (15) is positioned and fixed on the gear case (8). The electromagnetic magnet (15) has a rod (15a) that can reciprocate in the axial direction, and the tip of this rod (15a) presses the lever (28) to rotate it. A brake releasing means (31) is configured by the electromagnetic magnet (15) and the lever (28).

The brake device of this embodiment is composed of a brake disc (21), a subassembly (22) and an electromagnetic magnet (15).

In the braking device configured as described above, the electromagnetic magnet (15) is not energized when the car is stopped, and the spring (2
The pressing force of 7) causes the shoes (25) to be pressed against both sides of the brake disc (21). Therefore, the frictional force between the brake disc (21) and the shoe (25) prevents rotation of the input shaft (10), that is, the sheave (3).

On the other hand, at startup, the electromagnetic magnet (15) is excited and the rod (15a) is pushed out. As a result, the lever (28) rotates, the arm (24) rotates against the spring (27), the shoe (25) is separated from the brake disc (21), and the input shaft (10) rotates. It will be possible.

In such a braking device, the brake disc (2
Since the dimension of 1) in the axial direction (horizontal direction in FIG. 5) is smaller, the motor (9) is closer to the gear case (8) than before, and the axial direction of the motor (9) (up and down direction in FIG. 1). Direction), the overall size of the hoisting machine is smaller.

Moreover, since the components such as the screw rod (26) and the spring (27) are arranged parallel to the input shaft (10), that is, are provided in the axial direction of the motor (9), the axial direction of the motor (9). The overall size of the hoisting machine in the direction (right and left direction in FIG. 1) perpendicular to is also smaller than the conventional size.

Since the hoisting machine is downsized in this way, the machine room in which the hoisting machine is installed can be made small. That is, the hoisting machine of the above embodiment can be installed in a machine room smaller than the conventional one.

Further, in the conventional example, as shown in FIG. 9, the arm (13) and the spring (14) are also arranged on the side of the sheave (3) side of the brake drum (11), but this portion is Since it is surrounded by the gear case (8), the brake drum (11), the motor (9) and the sheave (3), the assembly and maintenance work is very troublesome. On the other hand, in the brake device of the above-described embodiment, the sub-assembly (22) is arranged on the side opposite to the sheave of the input shaft (10), so that assembly and maintenance inspection work is easy.

Further, in the above embodiment, the main components of the brake device are assembled as the sub-assembly (22), which is attached according to the reference surface provided on the gear case (8). The whole exchange is included.) Has become easier.

In the above embodiment, the input shaft (10) is shown as the rotary shaft to which the brake disc (21) is fixed, but the output shaft (3
It may be 0).

In the above embodiment, the gear is interposed between the motor (9) and the sheave (3), but the sheave (3) may be directly connected to the motor (9). In this case, the brake disc (21) is the motor or sheave (3).
It suffices if it is fixed to the rotating shaft of the above, and the effect of the present invention can be obtained also by this.

[Advantages of the Invention] As described above, since the brake device of the elevator hoisting machine of the present invention uses the brake disc instead of the conventional brake drum, the overall size of the hoisting machine in the axial direction of the motor is reduced. Since the shoe is arranged so that it can be brought into contact with and separated from a part of both sides of the brake disc, and the spring is arranged parallel to the rotation axis, the hoisting machine in the direction perpendicular to the axial direction of the motor. The overall size can be reduced, and as a result, the hoisting machine can be downsized as a whole, and the hoisting machine can be arranged in a small machine room. Furthermore, the arm, shoe, and spring are incorporated into the sub-assembly, and the sub-assembly is attached to the reference shaft provided on the gear case on the side opposite to the input shaft on the sheave side. There is also an effect that maintenance inspection including replacement becomes easier.

[Brief description of drawings]

1 is a plan view showing an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a sectional view of FIG. 1, and FIG.
FIG. 5 is a front view showing an example of the brake disc of FIG. 5, FIG. 5 is a sectional view of FIG. 4, FIG. 6 is a front view showing the sub-assembly of FIG. 1, FIG. 7 is a side view of FIG. FIG. 9 is a front view showing a conventional device, and FIG. 9 is a plan view of FIG. In the figure, (3) is a sheave, (9) is a motor, (10) is an input shaft (rotating shaft), (15) is an electromagnetic magnet, (21) is a brake disc, (25) is a shoe, (27). Is a spring,
(31) is a brake releasing means. In each figure, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-236189 (JP, A) JP-A-2-158591 (JP, A) Jitsuko Sho 52-40314 (JP, Y2)

Claims (1)

(57) [Claims] 1. A brake disc fixed to a rotary shaft for transmitting the rotation of a motor to a sheave, a pair of rotatable arms arranged on both sides of the brake disc, and a pair of rotatable arms supported by these arms. A pair of shoes that come into contact with and separate from the brake disc by rotation, and a spring that is arranged in parallel with the rotation shaft and that biases the arm toward the side where the shoe comes into contact with the brake disc, A sub-assembly mounted on the side opposite to the sheave in alignment with the reference surface of the gear case; and an electromagnetic magnet, and brake release means for pulling the shoe away from the brake disc against the force of the spring. Brake device for elevator hoisting machine.